From 2969c3107ce2ada0958f0e30b7a105e875f89fc4 Mon Sep 17 00:00:00 2001
From: Niklas Kiefer <niklas.kiefer@camunda.com>
Date: Fri, 28 Jul 2023 10:58:44 +0200
Subject: [PATCH] feat: update to form-js@1.1.0

---
 src/main/resources/public/css/form-js.css     |    17 +-
 .../resources/public/js/form-viewer.umd.js    | 40843 ++++++++--------
 2 files changed, 19795 insertions(+), 21065 deletions(-)

diff --git a/src/main/resources/public/css/form-js.css b/src/main/resources/public/css/form-js.css
index 6768d0b..ca3bdf2 100644
--- a/src/main/resources/public/css/form-js.css
+++ b/src/main/resources/public/css/form-js.css
@@ -32,7 +32,7 @@
    * Specify color variables in the following schema:
    * 1 - use specified layer
    * 2 - use layer one
-   * 3 - use fallback
+   * 3 - use fallback 
    */
   --color-background: var(
     --cds-field,
@@ -160,6 +160,10 @@
   position: relative;
 }
 
+.fjs-container .fjs-layout-row:empty {
+  display: none;
+}
+
 .fjs-container .fjs-column {
   flex-grow: 1;
 }
@@ -350,6 +354,13 @@
   margin: auto;
 }
 
+.fjs-container .fjs-form-field-spacer {
+  background-color: transparent;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
 .fjs-container .fjs-input[type=text],
 .fjs-container .fjs-input[type=email],
 .fjs-container .fjs-input[type=tel],
@@ -689,6 +700,10 @@
   list-style-type: none;
 }
 
+.fjs-container .fjs-form-field-text {
+  overflow-wrap: break-word;
+}
+
 .fjs-container .fjs-form-field-text a {
   color: var(--color-accent);
 }
diff --git a/src/main/resources/public/js/form-viewer.umd.js b/src/main/resources/public/js/form-viewer.umd.js
index 1133039..93526f6 100644
--- a/src/main/resources/public/js/form-viewer.umd.js
+++ b/src/main/resources/public/js/form-viewer.umd.js
@@ -174,7 +174,7 @@
    *
    * @return {Array<?>}
    */
-  function flatten$3(arr) {
+  function flatten$2(arr) {
     return Array.prototype.concat.apply([], arr);
   }
 
@@ -193,7 +193,7 @@
     return obj == null;
   }
 
-  function isArray$3(obj) {
+  function isArray$2(obj) {
     return nativeToString.call(obj) === '[object Array]';
   }
 
@@ -201,7 +201,7 @@
     return nativeToString.call(obj) === '[object Object]';
   }
 
-  function isNumber$3(obj) {
+  function isNumber$2(obj) {
     return nativeToString.call(obj) === '[object Number]';
   }
 
@@ -217,7 +217,7 @@
     );
   }
 
-  function isString$3(obj) {
+  function isString$2(obj) {
     return nativeToString.call(obj) === '[object String]';
   }
 
@@ -246,7 +246,7 @@
 
     matcher = toMatcher(matcher);
 
-    let idx = isArray$3(collection) ? -1 : undefined;
+    let idx = isArray$2(collection) ? -1 : undefined;
 
     forEach(collection, function(val, key) {
       if (matcher(val, key)) {
@@ -278,7 +278,7 @@
       return;
     }
 
-    const convertKey = isArray$3(collection) ? toNum : identity;
+    const convertKey = isArray$2(collection) ? toNum : identity;
 
     for (let key in collection) {
 
@@ -295,6 +295,27 @@
   }
 
 
+  /**
+   * Transform a collection into another collection
+   * by piping each member through the given fn.
+   *
+   * @param  {Object|Array}   collection
+   * @param  {Function} fn
+   *
+   * @return {Array} transformed collection
+   */
+  function map(collection, fn) {
+
+    let result = [];
+
+    forEach(collection, function(val, key) {
+      result.push(fn(val, key));
+    });
+
+    return result;
+  }
+
+
   /**
    * Group collection members by attribute.
    *
@@ -323,6 +344,22 @@
   }
 
 
+  function uniqueBy(extractor, ...collections) {
+
+    extractor = toExtractor(extractor);
+
+    let grouped = {};
+
+    forEach(collections, (c) => groupBy(c, extractor, grouped));
+
+    let result = map(grouped, function(val, key) {
+      return val[0];
+    });
+
+    return result;
+  }
+
+
   function toExtractor(extractor) {
     return isFunction(extractor) ? extractor : (e) => {
       return e[extractor];
@@ -444,6 +481,1031 @@
     return isUndefined$1(currentTarget) ? defaultValue : currentTarget;
   }
 
+  /*
+   *  big.js v6.2.1
+   *  A small, fast, easy-to-use library for arbitrary-precision decimal arithmetic.
+   *  Copyright (c) 2022 Michael Mclaughlin
+   *  https://github.com/MikeMcl/big.js/LICENCE.md
+   */
+
+
+  /************************************** EDITABLE DEFAULTS *****************************************/
+
+
+    // The default values below must be integers within the stated ranges.
+
+    /*
+     * The maximum number of decimal places (DP) of the results of operations involving division:
+     * div and sqrt, and pow with negative exponents.
+     */
+  var DP = 20,          // 0 to MAX_DP
+
+    /*
+     * The rounding mode (RM) used when rounding to the above decimal places.
+     *
+     *  0  Towards zero (i.e. truncate, no rounding).       (ROUND_DOWN)
+     *  1  To nearest neighbour. If equidistant, round up.  (ROUND_HALF_UP)
+     *  2  To nearest neighbour. If equidistant, to even.   (ROUND_HALF_EVEN)
+     *  3  Away from zero.                                  (ROUND_UP)
+     */
+    RM = 1,             // 0, 1, 2 or 3
+
+    // The maximum value of DP and Big.DP.
+    MAX_DP = 1E6,       // 0 to 1000000
+
+    // The maximum magnitude of the exponent argument to the pow method.
+    MAX_POWER = 1E6,    // 1 to 1000000
+
+    /*
+     * The negative exponent (NE) at and beneath which toString returns exponential notation.
+     * (JavaScript numbers: -7)
+     * -1000000 is the minimum recommended exponent value of a Big.
+     */
+    NE = -7,            // 0 to -1000000
+
+    /*
+     * The positive exponent (PE) at and above which toString returns exponential notation.
+     * (JavaScript numbers: 21)
+     * 1000000 is the maximum recommended exponent value of a Big, but this limit is not enforced.
+     */
+    PE = 21,            // 0 to 1000000
+
+    /*
+     * When true, an error will be thrown if a primitive number is passed to the Big constructor,
+     * or if valueOf is called, or if toNumber is called on a Big which cannot be converted to a
+     * primitive number without a loss of precision.
+     */
+    STRICT = false,     // true or false
+
+
+  /**************************************************************************************************/
+
+
+    // Error messages.
+    NAME = '[big.js] ',
+    INVALID$3 = NAME + 'Invalid ',
+    INVALID_DP = INVALID$3 + 'decimal places',
+    INVALID_RM = INVALID$3 + 'rounding mode',
+    DIV_BY_ZERO = NAME + 'Division by zero',
+
+    // The shared prototype object.
+    P$2 = {},
+    UNDEFINED = void 0,
+    NUMERIC = /^-?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i;
+
+
+  /*
+   * Create and return a Big constructor.
+   */
+  function _Big_() {
+
+    /*
+     * The Big constructor and exported function.
+     * Create and return a new instance of a Big number object.
+     *
+     * n {number|string|Big} A numeric value.
+     */
+    function Big(n) {
+      var x = this;
+
+      // Enable constructor usage without new.
+      if (!(x instanceof Big)) return n === UNDEFINED ? _Big_() : new Big(n);
+
+      // Duplicate.
+      if (n instanceof Big) {
+        x.s = n.s;
+        x.e = n.e;
+        x.c = n.c.slice();
+      } else {
+        if (typeof n !== 'string') {
+          if (Big.strict === true && typeof n !== 'bigint') {
+            throw TypeError(INVALID$3 + 'value');
+          }
+
+          // Minus zero?
+          n = n === 0 && 1 / n < 0 ? '-0' : String(n);
+        }
+
+        parse$1(x, n);
+      }
+
+      // Retain a reference to this Big constructor.
+      // Shadow Big.prototype.constructor which points to Object.
+      x.constructor = Big;
+    }
+
+    Big.prototype = P$2;
+    Big.DP = DP;
+    Big.RM = RM;
+    Big.NE = NE;
+    Big.PE = PE;
+    Big.strict = STRICT;
+    Big.roundDown = 0;
+    Big.roundHalfUp = 1;
+    Big.roundHalfEven = 2;
+    Big.roundUp = 3;
+
+    return Big;
+  }
+
+
+  /*
+   * Parse the number or string value passed to a Big constructor.
+   *
+   * x {Big} A Big number instance.
+   * n {number|string} A numeric value.
+   */
+  function parse$1(x, n) {
+    var e, i, nl;
+
+    if (!NUMERIC.test(n)) {
+      throw Error(INVALID$3 + 'number');
+    }
+
+    // Determine sign.
+    x.s = n.charAt(0) == '-' ? (n = n.slice(1), -1) : 1;
+
+    // Decimal point?
+    if ((e = n.indexOf('.')) > -1) n = n.replace('.', '');
+
+    // Exponential form?
+    if ((i = n.search(/e/i)) > 0) {
+
+      // Determine exponent.
+      if (e < 0) e = i;
+      e += +n.slice(i + 1);
+      n = n.substring(0, i);
+    } else if (e < 0) {
+
+      // Integer.
+      e = n.length;
+    }
+
+    nl = n.length;
+
+    // Determine leading zeros.
+    for (i = 0; i < nl && n.charAt(i) == '0';) ++i;
+
+    if (i == nl) {
+
+      // Zero.
+      x.c = [x.e = 0];
+    } else {
+
+      // Determine trailing zeros.
+      for (; nl > 0 && n.charAt(--nl) == '0';);
+      x.e = e - i - 1;
+      x.c = [];
+
+      // Convert string to array of digits without leading/trailing zeros.
+      for (e = 0; i <= nl;) x.c[e++] = +n.charAt(i++);
+    }
+
+    return x;
+  }
+
+
+  /*
+   * Round Big x to a maximum of sd significant digits using rounding mode rm.
+   *
+   * x {Big} The Big to round.
+   * sd {number} Significant digits: integer, 0 to MAX_DP inclusive.
+   * rm {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
+   * [more] {boolean} Whether the result of division was truncated.
+   */
+  function round$1(x, sd, rm, more) {
+    var xc = x.c;
+
+    if (rm === UNDEFINED) rm = x.constructor.RM;
+    if (rm !== 0 && rm !== 1 && rm !== 2 && rm !== 3) {
+      throw Error(INVALID_RM);
+    }
+
+    if (sd < 1) {
+      more =
+        rm === 3 && (more || !!xc[0]) || sd === 0 && (
+        rm === 1 && xc[0] >= 5 ||
+        rm === 2 && (xc[0] > 5 || xc[0] === 5 && (more || xc[1] !== UNDEFINED))
+      );
+
+      xc.length = 1;
+
+      if (more) {
+
+        // 1, 0.1, 0.01, 0.001, 0.0001 etc.
+        x.e = x.e - sd + 1;
+        xc[0] = 1;
+      } else {
+
+        // Zero.
+        xc[0] = x.e = 0;
+      }
+    } else if (sd < xc.length) {
+
+      // xc[sd] is the digit after the digit that may be rounded up.
+      more =
+        rm === 1 && xc[sd] >= 5 ||
+        rm === 2 && (xc[sd] > 5 || xc[sd] === 5 &&
+          (more || xc[sd + 1] !== UNDEFINED || xc[sd - 1] & 1)) ||
+        rm === 3 && (more || !!xc[0]);
+
+      // Remove any digits after the required precision.
+      xc.length = sd;
+
+      // Round up?
+      if (more) {
+
+        // Rounding up may mean the previous digit has to be rounded up.
+        for (; ++xc[--sd] > 9;) {
+          xc[sd] = 0;
+          if (sd === 0) {
+            ++x.e;
+            xc.unshift(1);
+            break;
+          }
+        }
+      }
+
+      // Remove trailing zeros.
+      for (sd = xc.length; !xc[--sd];) xc.pop();
+    }
+
+    return x;
+  }
+
+
+  /*
+   * Return a string representing the value of Big x in normal or exponential notation.
+   * Handles P.toExponential, P.toFixed, P.toJSON, P.toPrecision, P.toString and P.valueOf.
+   */
+  function stringify(x, doExponential, isNonzero) {
+    var e = x.e,
+      s = x.c.join(''),
+      n = s.length;
+
+    // Exponential notation?
+    if (doExponential) {
+      s = s.charAt(0) + (n > 1 ? '.' + s.slice(1) : '') + (e < 0 ? 'e' : 'e+') + e;
+
+    // Normal notation.
+    } else if (e < 0) {
+      for (; ++e;) s = '0' + s;
+      s = '0.' + s;
+    } else if (e > 0) {
+      if (++e > n) {
+        for (e -= n; e--;) s += '0';
+      } else if (e < n) {
+        s = s.slice(0, e) + '.' + s.slice(e);
+      }
+    } else if (n > 1) {
+      s = s.charAt(0) + '.' + s.slice(1);
+    }
+
+    return x.s < 0 && isNonzero ? '-' + s : s;
+  }
+
+
+  // Prototype/instance methods
+
+
+  /*
+   * Return a new Big whose value is the absolute value of this Big.
+   */
+  P$2.abs = function () {
+    var x = new this.constructor(this);
+    x.s = 1;
+    return x;
+  };
+
+
+  /*
+   * Return 1 if the value of this Big is greater than the value of Big y,
+   *       -1 if the value of this Big is less than the value of Big y, or
+   *        0 if they have the same value.
+   */
+  P$2.cmp = function (y) {
+    var isneg,
+      x = this,
+      xc = x.c,
+      yc = (y = new x.constructor(y)).c,
+      i = x.s,
+      j = y.s,
+      k = x.e,
+      l = y.e;
+
+    // Either zero?
+    if (!xc[0] || !yc[0]) return !xc[0] ? !yc[0] ? 0 : -j : i;
+
+    // Signs differ?
+    if (i != j) return i;
+
+    isneg = i < 0;
+
+    // Compare exponents.
+    if (k != l) return k > l ^ isneg ? 1 : -1;
+
+    j = (k = xc.length) < (l = yc.length) ? k : l;
+
+    // Compare digit by digit.
+    for (i = -1; ++i < j;) {
+      if (xc[i] != yc[i]) return xc[i] > yc[i] ^ isneg ? 1 : -1;
+    }
+
+    // Compare lengths.
+    return k == l ? 0 : k > l ^ isneg ? 1 : -1;
+  };
+
+
+  /*
+   * Return a new Big whose value is the value of this Big divided by the value of Big y, rounded,
+   * if necessary, to a maximum of Big.DP decimal places using rounding mode Big.RM.
+   */
+  P$2.div = function (y) {
+    var x = this,
+      Big = x.constructor,
+      a = x.c,                  // dividend
+      b = (y = new Big(y)).c,   // divisor
+      k = x.s == y.s ? 1 : -1,
+      dp = Big.DP;
+
+    if (dp !== ~~dp || dp < 0 || dp > MAX_DP) {
+      throw Error(INVALID_DP);
+    }
+
+    // Divisor is zero?
+    if (!b[0]) {
+      throw Error(DIV_BY_ZERO);
+    }
+
+    // Dividend is 0? Return +-0.
+    if (!a[0]) {
+      y.s = k;
+      y.c = [y.e = 0];
+      return y;
+    }
+
+    var bl, bt, n, cmp, ri,
+      bz = b.slice(),
+      ai = bl = b.length,
+      al = a.length,
+      r = a.slice(0, bl),   // remainder
+      rl = r.length,
+      q = y,                // quotient
+      qc = q.c = [],
+      qi = 0,
+      p = dp + (q.e = x.e - y.e) + 1;    // precision of the result
+
+    q.s = k;
+    k = p < 0 ? 0 : p;
+
+    // Create version of divisor with leading zero.
+    bz.unshift(0);
+
+    // Add zeros to make remainder as long as divisor.
+    for (; rl++ < bl;) r.push(0);
+
+    do {
+
+      // n is how many times the divisor goes into current remainder.
+      for (n = 0; n < 10; n++) {
+
+        // Compare divisor and remainder.
+        if (bl != (rl = r.length)) {
+          cmp = bl > rl ? 1 : -1;
+        } else {
+          for (ri = -1, cmp = 0; ++ri < bl;) {
+            if (b[ri] != r[ri]) {
+              cmp = b[ri] > r[ri] ? 1 : -1;
+              break;
+            }
+          }
+        }
+
+        // If divisor < remainder, subtract divisor from remainder.
+        if (cmp < 0) {
+
+          // Remainder can't be more than 1 digit longer than divisor.
+          // Equalise lengths using divisor with extra leading zero?
+          for (bt = rl == bl ? b : bz; rl;) {
+            if (r[--rl] < bt[rl]) {
+              ri = rl;
+              for (; ri && !r[--ri];) r[ri] = 9;
+              --r[ri];
+              r[rl] += 10;
+            }
+            r[rl] -= bt[rl];
+          }
+
+          for (; !r[0];) r.shift();
+        } else {
+          break;
+        }
+      }
+
+      // Add the digit n to the result array.
+      qc[qi++] = cmp ? n : ++n;
+
+      // Update the remainder.
+      if (r[0] && cmp) r[rl] = a[ai] || 0;
+      else r = [a[ai]];
+
+    } while ((ai++ < al || r[0] !== UNDEFINED) && k--);
+
+    // Leading zero? Do not remove if result is simply zero (qi == 1).
+    if (!qc[0] && qi != 1) {
+
+      // There can't be more than one zero.
+      qc.shift();
+      q.e--;
+      p--;
+    }
+
+    // Round?
+    if (qi > p) round$1(q, p, Big.RM, r[0] !== UNDEFINED);
+
+    return q;
+  };
+
+
+  /*
+   * Return true if the value of this Big is equal to the value of Big y, otherwise return false.
+   */
+  P$2.eq = function (y) {
+    return this.cmp(y) === 0;
+  };
+
+
+  /*
+   * Return true if the value of this Big is greater than the value of Big y, otherwise return
+   * false.
+   */
+  P$2.gt = function (y) {
+    return this.cmp(y) > 0;
+  };
+
+
+  /*
+   * Return true if the value of this Big is greater than or equal to the value of Big y, otherwise
+   * return false.
+   */
+  P$2.gte = function (y) {
+    return this.cmp(y) > -1;
+  };
+
+
+  /*
+   * Return true if the value of this Big is less than the value of Big y, otherwise return false.
+   */
+  P$2.lt = function (y) {
+    return this.cmp(y) < 0;
+  };
+
+
+  /*
+   * Return true if the value of this Big is less than or equal to the value of Big y, otherwise
+   * return false.
+   */
+  P$2.lte = function (y) {
+    return this.cmp(y) < 1;
+  };
+
+
+  /*
+   * Return a new Big whose value is the value of this Big minus the value of Big y.
+   */
+  P$2.minus = P$2.sub = function (y) {
+    var i, j, t, xlty,
+      x = this,
+      Big = x.constructor,
+      a = x.s,
+      b = (y = new Big(y)).s;
+
+    // Signs differ?
+    if (a != b) {
+      y.s = -b;
+      return x.plus(y);
+    }
+
+    var xc = x.c.slice(),
+      xe = x.e,
+      yc = y.c,
+      ye = y.e;
+
+    // Either zero?
+    if (!xc[0] || !yc[0]) {
+      if (yc[0]) {
+        y.s = -b;
+      } else if (xc[0]) {
+        y = new Big(x);
+      } else {
+        y.s = 1;
+      }
+      return y;
+    }
+
+    // Determine which is the bigger number. Prepend zeros to equalise exponents.
+    if (a = xe - ye) {
+
+      if (xlty = a < 0) {
+        a = -a;
+        t = xc;
+      } else {
+        ye = xe;
+        t = yc;
+      }
+
+      t.reverse();
+      for (b = a; b--;) t.push(0);
+      t.reverse();
+    } else {
+
+      // Exponents equal. Check digit by digit.
+      j = ((xlty = xc.length < yc.length) ? xc : yc).length;
+
+      for (a = b = 0; b < j; b++) {
+        if (xc[b] != yc[b]) {
+          xlty = xc[b] < yc[b];
+          break;
+        }
+      }
+    }
+
+    // x < y? Point xc to the array of the bigger number.
+    if (xlty) {
+      t = xc;
+      xc = yc;
+      yc = t;
+      y.s = -y.s;
+    }
+
+    /*
+     * Append zeros to xc if shorter. No need to add zeros to yc if shorter as subtraction only
+     * needs to start at yc.length.
+     */
+    if ((b = (j = yc.length) - (i = xc.length)) > 0) for (; b--;) xc[i++] = 0;
+
+    // Subtract yc from xc.
+    for (b = i; j > a;) {
+      if (xc[--j] < yc[j]) {
+        for (i = j; i && !xc[--i];) xc[i] = 9;
+        --xc[i];
+        xc[j] += 10;
+      }
+
+      xc[j] -= yc[j];
+    }
+
+    // Remove trailing zeros.
+    for (; xc[--b] === 0;) xc.pop();
+
+    // Remove leading zeros and adjust exponent accordingly.
+    for (; xc[0] === 0;) {
+      xc.shift();
+      --ye;
+    }
+
+    if (!xc[0]) {
+
+      // n - n = +0
+      y.s = 1;
+
+      // Result must be zero.
+      xc = [ye = 0];
+    }
+
+    y.c = xc;
+    y.e = ye;
+
+    return y;
+  };
+
+
+  /*
+   * Return a new Big whose value is the value of this Big modulo the value of Big y.
+   */
+  P$2.mod = function (y) {
+    var ygtx,
+      x = this,
+      Big = x.constructor,
+      a = x.s,
+      b = (y = new Big(y)).s;
+
+    if (!y.c[0]) {
+      throw Error(DIV_BY_ZERO);
+    }
+
+    x.s = y.s = 1;
+    ygtx = y.cmp(x) == 1;
+    x.s = a;
+    y.s = b;
+
+    if (ygtx) return new Big(x);
+
+    a = Big.DP;
+    b = Big.RM;
+    Big.DP = Big.RM = 0;
+    x = x.div(y);
+    Big.DP = a;
+    Big.RM = b;
+
+    return this.minus(x.times(y));
+  };
+
+
+  /*
+   * Return a new Big whose value is the value of this Big negated.
+   */
+  P$2.neg = function () {
+    var x = new this.constructor(this);
+    x.s = -x.s;
+    return x;
+  };
+
+
+  /*
+   * Return a new Big whose value is the value of this Big plus the value of Big y.
+   */
+  P$2.plus = P$2.add = function (y) {
+    var e, k, t,
+      x = this,
+      Big = x.constructor;
+
+    y = new Big(y);
+
+    // Signs differ?
+    if (x.s != y.s) {
+      y.s = -y.s;
+      return x.minus(y);
+    }
+
+    var xe = x.e,
+      xc = x.c,
+      ye = y.e,
+      yc = y.c;
+
+    // Either zero?
+    if (!xc[0] || !yc[0]) {
+      if (!yc[0]) {
+        if (xc[0]) {
+          y = new Big(x);
+        } else {
+          y.s = x.s;
+        }
+      }
+      return y;
+    }
+
+    xc = xc.slice();
+
+    // Prepend zeros to equalise exponents.
+    // Note: reverse faster than unshifts.
+    if (e = xe - ye) {
+      if (e > 0) {
+        ye = xe;
+        t = yc;
+      } else {
+        e = -e;
+        t = xc;
+      }
+
+      t.reverse();
+      for (; e--;) t.push(0);
+      t.reverse();
+    }
+
+    // Point xc to the longer array.
+    if (xc.length - yc.length < 0) {
+      t = yc;
+      yc = xc;
+      xc = t;
+    }
+
+    e = yc.length;
+
+    // Only start adding at yc.length - 1 as the further digits of xc can be left as they are.
+    for (k = 0; e; xc[e] %= 10) k = (xc[--e] = xc[e] + yc[e] + k) / 10 | 0;
+
+    // No need to check for zero, as +x + +y != 0 && -x + -y != 0
+
+    if (k) {
+      xc.unshift(k);
+      ++ye;
+    }
+
+    // Remove trailing zeros.
+    for (e = xc.length; xc[--e] === 0;) xc.pop();
+
+    y.c = xc;
+    y.e = ye;
+
+    return y;
+  };
+
+
+  /*
+   * Return a Big whose value is the value of this Big raised to the power n.
+   * If n is negative, round to a maximum of Big.DP decimal places using rounding
+   * mode Big.RM.
+   *
+   * n {number} Integer, -MAX_POWER to MAX_POWER inclusive.
+   */
+  P$2.pow = function (n) {
+    var x = this,
+      one = new x.constructor('1'),
+      y = one,
+      isneg = n < 0;
+
+    if (n !== ~~n || n < -MAX_POWER || n > MAX_POWER) {
+      throw Error(INVALID$3 + 'exponent');
+    }
+
+    if (isneg) n = -n;
+
+    for (;;) {
+      if (n & 1) y = y.times(x);
+      n >>= 1;
+      if (!n) break;
+      x = x.times(x);
+    }
+
+    return isneg ? one.div(y) : y;
+  };
+
+
+  /*
+   * Return a new Big whose value is the value of this Big rounded to a maximum precision of sd
+   * significant digits using rounding mode rm, or Big.RM if rm is not specified.
+   *
+   * sd {number} Significant digits: integer, 1 to MAX_DP inclusive.
+   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
+   */
+  P$2.prec = function (sd, rm) {
+    if (sd !== ~~sd || sd < 1 || sd > MAX_DP) {
+      throw Error(INVALID$3 + 'precision');
+    }
+    return round$1(new this.constructor(this), sd, rm);
+  };
+
+
+  /*
+   * Return a new Big whose value is the value of this Big rounded to a maximum of dp decimal places
+   * using rounding mode rm, or Big.RM if rm is not specified.
+   * If dp is negative, round to an integer which is a multiple of 10**-dp.
+   * If dp is not specified, round to 0 decimal places.
+   *
+   * dp? {number} Integer, -MAX_DP to MAX_DP inclusive.
+   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
+   */
+  P$2.round = function (dp, rm) {
+    if (dp === UNDEFINED) dp = 0;
+    else if (dp !== ~~dp || dp < -MAX_DP || dp > MAX_DP) {
+      throw Error(INVALID_DP);
+    }
+    return round$1(new this.constructor(this), dp + this.e + 1, rm);
+  };
+
+
+  /*
+   * Return a new Big whose value is the square root of the value of this Big, rounded, if
+   * necessary, to a maximum of Big.DP decimal places using rounding mode Big.RM.
+   */
+  P$2.sqrt = function () {
+    var r, c, t,
+      x = this,
+      Big = x.constructor,
+      s = x.s,
+      e = x.e,
+      half = new Big('0.5');
+
+    // Zero?
+    if (!x.c[0]) return new Big(x);
+
+    // Negative?
+    if (s < 0) {
+      throw Error(NAME + 'No square root');
+    }
+
+    // Estimate.
+    s = Math.sqrt(x + '');
+
+    // Math.sqrt underflow/overflow?
+    // Re-estimate: pass x coefficient to Math.sqrt as integer, then adjust the result exponent.
+    if (s === 0 || s === 1 / 0) {
+      c = x.c.join('');
+      if (!(c.length + e & 1)) c += '0';
+      s = Math.sqrt(c);
+      e = ((e + 1) / 2 | 0) - (e < 0 || e & 1);
+      r = new Big((s == 1 / 0 ? '5e' : (s = s.toExponential()).slice(0, s.indexOf('e') + 1)) + e);
+    } else {
+      r = new Big(s + '');
+    }
+
+    e = r.e + (Big.DP += 4);
+
+    // Newton-Raphson iteration.
+    do {
+      t = r;
+      r = half.times(t.plus(x.div(t)));
+    } while (t.c.slice(0, e).join('') !== r.c.slice(0, e).join(''));
+
+    return round$1(r, (Big.DP -= 4) + r.e + 1, Big.RM);
+  };
+
+
+  /*
+   * Return a new Big whose value is the value of this Big times the value of Big y.
+   */
+  P$2.times = P$2.mul = function (y) {
+    var c,
+      x = this,
+      Big = x.constructor,
+      xc = x.c,
+      yc = (y = new Big(y)).c,
+      a = xc.length,
+      b = yc.length,
+      i = x.e,
+      j = y.e;
+
+    // Determine sign of result.
+    y.s = x.s == y.s ? 1 : -1;
+
+    // Return signed 0 if either 0.
+    if (!xc[0] || !yc[0]) {
+      y.c = [y.e = 0];
+      return y;
+    }
+
+    // Initialise exponent of result as x.e + y.e.
+    y.e = i + j;
+
+    // If array xc has fewer digits than yc, swap xc and yc, and lengths.
+    if (a < b) {
+      c = xc;
+      xc = yc;
+      yc = c;
+      j = a;
+      a = b;
+      b = j;
+    }
+
+    // Initialise coefficient array of result with zeros.
+    for (c = new Array(j = a + b); j--;) c[j] = 0;
+
+    // Multiply.
+
+    // i is initially xc.length.
+    for (i = b; i--;) {
+      b = 0;
+
+      // a is yc.length.
+      for (j = a + i; j > i;) {
+
+        // Current sum of products at this digit position, plus carry.
+        b = c[j] + yc[i] * xc[j - i - 1] + b;
+        c[j--] = b % 10;
+
+        // carry
+        b = b / 10 | 0;
+      }
+
+      c[j] = b;
+    }
+
+    // Increment result exponent if there is a final carry, otherwise remove leading zero.
+    if (b) ++y.e;
+    else c.shift();
+
+    // Remove trailing zeros.
+    for (i = c.length; !c[--i];) c.pop();
+    y.c = c;
+
+    return y;
+  };
+
+
+  /*
+   * Return a string representing the value of this Big in exponential notation rounded to dp fixed
+   * decimal places using rounding mode rm, or Big.RM if rm is not specified.
+   *
+   * dp? {number} Decimal places: integer, 0 to MAX_DP inclusive.
+   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
+   */
+  P$2.toExponential = function (dp, rm) {
+    var x = this,
+      n = x.c[0];
+
+    if (dp !== UNDEFINED) {
+      if (dp !== ~~dp || dp < 0 || dp > MAX_DP) {
+        throw Error(INVALID_DP);
+      }
+      x = round$1(new x.constructor(x), ++dp, rm);
+      for (; x.c.length < dp;) x.c.push(0);
+    }
+
+    return stringify(x, true, !!n);
+  };
+
+
+  /*
+   * Return a string representing the value of this Big in normal notation rounded to dp fixed
+   * decimal places using rounding mode rm, or Big.RM if rm is not specified.
+   *
+   * dp? {number} Decimal places: integer, 0 to MAX_DP inclusive.
+   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
+   *
+   * (-0).toFixed(0) is '0', but (-0.1).toFixed(0) is '-0'.
+   * (-0).toFixed(1) is '0.0', but (-0.01).toFixed(1) is '-0.0'.
+   */
+  P$2.toFixed = function (dp, rm) {
+    var x = this,
+      n = x.c[0];
+
+    if (dp !== UNDEFINED) {
+      if (dp !== ~~dp || dp < 0 || dp > MAX_DP) {
+        throw Error(INVALID_DP);
+      }
+      x = round$1(new x.constructor(x), dp + x.e + 1, rm);
+
+      // x.e may have changed if the value is rounded up.
+      for (dp = dp + x.e + 1; x.c.length < dp;) x.c.push(0);
+    }
+
+    return stringify(x, false, !!n);
+  };
+
+
+  /*
+   * Return a string representing the value of this Big.
+   * Return exponential notation if this Big has a positive exponent equal to or greater than
+   * Big.PE, or a negative exponent equal to or less than Big.NE.
+   * Omit the sign for negative zero.
+   */
+  P$2[Symbol.for('nodejs.util.inspect.custom')] = P$2.toJSON = P$2.toString = function () {
+    var x = this,
+      Big = x.constructor;
+    return stringify(x, x.e <= Big.NE || x.e >= Big.PE, !!x.c[0]);
+  };
+
+
+  /*
+   * Return the value of this Big as a primitve number.
+   */
+  P$2.toNumber = function () {
+    var n = Number(stringify(this, true, true));
+    if (this.constructor.strict === true && !this.eq(n.toString())) {
+      throw Error(NAME + 'Imprecise conversion');
+    }
+    return n;
+  };
+
+
+  /*
+   * Return a string representing the value of this Big rounded to sd significant digits using
+   * rounding mode rm, or Big.RM if rm is not specified.
+   * Use exponential notation if sd is less than the number of digits necessary to represent
+   * the integer part of the value in normal notation.
+   *
+   * sd {number} Significant digits: integer, 1 to MAX_DP inclusive.
+   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
+   */
+  P$2.toPrecision = function (sd, rm) {
+    var x = this,
+      Big = x.constructor,
+      n = x.c[0];
+
+    if (sd !== UNDEFINED) {
+      if (sd !== ~~sd || sd < 1 || sd > MAX_DP) {
+        throw Error(INVALID$3 + 'precision');
+      }
+      x = round$1(new Big(x), sd, rm);
+      for (; x.c.length < sd;) x.c.push(0);
+    }
+
+    return stringify(x, sd <= x.e || x.e <= Big.NE || x.e >= Big.PE, !!n);
+  };
+
+
+  /*
+   * Return a string representing the value of this Big.
+   * Return exponential notation if this Big has a positive exponent equal to or greater than
+   * Big.PE, or a negative exponent equal to or less than Big.NE.
+   * Include the sign for negative zero.
+   */
+  P$2.valueOf = function () {
+    var x = this,
+      Big = x.constructor;
+    if (Big.strict === true) {
+      throw Error(NAME + 'valueOf disallowed');
+    }
+    return stringify(x, x.e <= Big.NE || x.e >= Big.PE, true);
+  };
+
+
+  // Export
+
+
+  var Big = _Big_();
+
   // these aren't really private, but nor are they really useful to document
 
   /**
@@ -1643,13 +2705,13 @@
       return defaultZone;
     } else if (input instanceof Zone) {
       return input;
-    } else if (isString$2(input)) {
+    } else if (isString$1(input)) {
       const lowered = input.toLowerCase();
       if (lowered === "default") return defaultZone;
       else if (lowered === "local" || lowered === "system") return SystemZone.instance;
       else if (lowered === "utc" || lowered === "gmt") return FixedOffsetZone.utcInstance;
       else return FixedOffsetZone.parseSpecifier(lowered) || IANAZone.create(input);
-    } else if (isNumber$2(input)) {
+    } else if (isNumber$1(input)) {
       return FixedOffsetZone.instance(input);
     } else if (typeof input === "object" && input.offset && typeof input.offset === "number") {
       // This is dumb, but the instanceof check above doesn't seem to really work
@@ -1819,7 +2881,7 @@
     return typeof o === "undefined";
   }
 
-  function isNumber$2(o) {
+  function isNumber$1(o) {
     return typeof o === "number";
   }
 
@@ -1827,7 +2889,7 @@
     return typeof o === "number" && o % 1 === 0;
   }
 
-  function isString$2(o) {
+  function isString$1(o) {
     return typeof o === "string";
   }
 
@@ -2670,7 +3732,7 @@
         .slice(0, 2);
   }
 
-  function parse$1(s, ...patterns) {
+  function parse(s, ...patterns) {
     if (s == null) {
       return [null, null];
     }
@@ -2915,7 +3977,7 @@
    */
 
   function parseISODate(s) {
-    return parse$1(
+    return parse(
       s,
       [isoYmdWithTimeExtensionRegex, extractISOYmdTimeAndOffset],
       [isoWeekWithTimeExtensionRegex, extractISOWeekTimeAndOffset],
@@ -2925,11 +3987,11 @@
   }
 
   function parseRFC2822Date(s) {
-    return parse$1(preprocessRFC2822(s), [rfc2822, extractRFC2822]);
+    return parse(preprocessRFC2822(s), [rfc2822, extractRFC2822]);
   }
 
   function parseHTTPDate(s) {
-    return parse$1(
+    return parse(
       s,
       [rfc1123, extractRFC1123Or850],
       [rfc850, extractRFC1123Or850],
@@ -2938,13 +4000,13 @@
   }
 
   function parseISODuration(s) {
-    return parse$1(s, [isoDuration, extractISODuration]);
+    return parse(s, [isoDuration, extractISODuration]);
   }
 
   const extractISOTimeOnly = combineExtractors(extractISOTime);
 
   function parseISOTimeOnly(s) {
-    return parse$1(s, [isoTimeOnly, extractISOTimeOnly]);
+    return parse(s, [isoTimeOnly, extractISOTimeOnly]);
   }
 
   const sqlYmdWithTimeExtensionRegex = combineRegexes(sqlYmdRegex, sqlTimeExtensionRegex);
@@ -2957,14 +4019,14 @@
   );
 
   function parseSQL(s) {
-    return parse$1(
+    return parse(
       s,
       [sqlYmdWithTimeExtensionRegex, extractISOYmdTimeAndOffset],
       [sqlTimeCombinedRegex, extractISOTimeOffsetAndIANAZone]
     );
   }
 
-  const INVALID$3 = "Invalid Duration";
+  const INVALID$2 = "Invalid Duration";
 
   // unit conversion constants
   const lowOrderMatrix = {
@@ -3229,7 +4291,7 @@
      * @return {Duration}
      */
     static fromDurationLike(durationLike) {
-      if (isNumber$2(durationLike)) {
+      if (isNumber$1(durationLike)) {
         return Duration.fromMillis(durationLike);
       } else if (Duration.isDuration(durationLike)) {
         return durationLike;
@@ -3396,7 +4458,7 @@
       };
       return this.isValid
         ? Formatter.create(this.loc, fmtOpts).formatDurationFromString(this, fmt)
-        : INVALID$3;
+        : INVALID$2;
     }
 
     /**
@@ -3706,7 +4768,7 @@
           }
 
           // plus anything that's already in this unit
-          if (isNumber$2(vals[k])) {
+          if (isNumber$1(vals[k])) {
             own += vals[k];
           }
 
@@ -3721,7 +4783,7 @@
             }
           }
           // otherwise, keep it in the wings to boil it later
-        } else if (isNumber$2(vals[k])) {
+        } else if (isNumber$1(vals[k])) {
           accumulated[k] = vals[k];
         }
       }
@@ -3898,7 +4960,7 @@
     }
   }
 
-  const INVALID$2 = "Invalid Interval";
+  const INVALID$1 = "Invalid Interval";
 
   // checks if the start is equal to or before the end
   function validateStartEnd(start, end) {
@@ -4419,7 +5481,7 @@
      * @return {string}
      */
     toString() {
-      if (!this.isValid) return INVALID$2;
+      if (!this.isValid) return INVALID$1;
       return `[${this.s.toISO()} – ${this.e.toISO()})`;
     }
 
@@ -4444,7 +5506,7 @@
     toLocaleString(formatOpts = DATE_SHORT, opts = {}) {
       return this.isValid
         ? Formatter.create(this.s.loc.clone(opts), formatOpts).formatInterval(this)
-        : INVALID$2;
+        : INVALID$1;
     }
 
     /**
@@ -4454,7 +5516,7 @@
      * @return {string}
      */
     toISO(opts) {
-      if (!this.isValid) return INVALID$2;
+      if (!this.isValid) return INVALID$1;
       return `${this.s.toISO(opts)}/${this.e.toISO(opts)}`;
     }
 
@@ -4465,7 +5527,7 @@
      * @return {string}
      */
     toISODate() {
-      if (!this.isValid) return INVALID$2;
+      if (!this.isValid) return INVALID$1;
       return `${this.s.toISODate()}/${this.e.toISODate()}`;
     }
 
@@ -4477,7 +5539,7 @@
      * @return {string}
      */
     toISOTime(opts) {
-      if (!this.isValid) return INVALID$2;
+      if (!this.isValid) return INVALID$1;
       return `${this.s.toISOTime(opts)}/${this.e.toISOTime(opts)}`;
     }
 
@@ -4493,7 +5555,7 @@
      * @return {string}
      */
     toFormat(dateFormat, { separator = " – " } = {}) {
-      if (!this.isValid) return INVALID$2;
+      if (!this.isValid) return INVALID$1;
       return `${this.s.toFormat(dateFormat)}${separator}${this.e.toFormat(dateFormat)}`;
     }
 
@@ -5423,7 +6485,7 @@
     } else return false;
   }
 
-  const INVALID$1 = "Invalid DateTime";
+  const INVALID = "Invalid DateTime";
   const MAX_DATE = 8.64e15;
 
   function unsupportedZone(zone) {
@@ -5973,7 +7035,7 @@
      * @return {DateTime}
      */
     static fromMillis(milliseconds, options = {}) {
-      if (!isNumber$2(milliseconds)) {
+      if (!isNumber$1(milliseconds)) {
         throw new InvalidArgumentError(
           `fromMillis requires a numerical input, but received a ${typeof milliseconds} with value ${milliseconds}`
         );
@@ -6000,7 +7062,7 @@
      * @return {DateTime}
      */
     static fromSeconds(seconds, options = {}) {
-      if (!isNumber$2(seconds)) {
+      if (!isNumber$1(seconds)) {
         throw new InvalidArgumentError("fromSeconds requires a numerical input");
       } else {
         return new DateTime({
@@ -6913,7 +7975,7 @@
     toFormat(fmt, opts = {}) {
       return this.isValid
         ? Formatter.create(this.loc.redefaultToEN(opts)).formatDateTimeFromString(this, fmt)
-        : INVALID$1;
+        : INVALID;
     }
 
     /**
@@ -6938,7 +8000,7 @@
     toLocaleString(formatOpts = DATE_SHORT, opts = {}) {
       return this.isValid
         ? Formatter.create(this.loc.clone(opts), formatOpts).formatDateTime(this)
-        : INVALID$1;
+        : INVALID;
     }
 
     /**
@@ -7147,7 +8209,7 @@
      * @return {string}
      */
     toString() {
-      return this.isValid ? this.toISO() : INVALID$1;
+      return this.isValid ? this.toISO() : INVALID;
     }
 
     /**
@@ -7609,7 +8671,7 @@
   function friendlyDateTime(dateTimeish) {
     if (DateTime.isDateTime(dateTimeish)) {
       return dateTimeish;
-    } else if (dateTimeish && dateTimeish.valueOf && isNumber$2(dateTimeish.valueOf())) {
+    } else if (dateTimeish && dateTimeish.valueOf && isNumber$1(dateTimeish.valueOf())) {
       return DateTime.fromJSDate(dateTimeish);
     } else if (dateTimeish && typeof dateTimeish === "object") {
       return DateTime.fromObject(dateTimeish);
@@ -7625,7 +8687,7 @@
   /// The default maximum length of a `TreeBuffer` node.
   const DefaultBufferLength = 1024;
   let nextPropID = 0;
-  let Range$3 = class Range {
+  let Range$2 = class Range {
       constructor(from, to) {
           this.from = from;
           this.to = to;
@@ -7712,8 +8774,8 @@
       /// Define a node type.
       static define(spec) {
           let props = spec.props && spec.props.length ? Object.create(null) : noProps;
-          let flags = (spec.top ? 1 /* Top */ : 0) | (spec.skipped ? 2 /* Skipped */ : 0) |
-              (spec.error ? 4 /* Error */ : 0) | (spec.name == null ? 8 /* Anonymous */ : 0);
+          let flags = (spec.top ? 1 /* NodeFlag.Top */ : 0) | (spec.skipped ? 2 /* NodeFlag.Skipped */ : 0) |
+              (spec.error ? 4 /* NodeFlag.Error */ : 0) | (spec.name == null ? 8 /* NodeFlag.Anonymous */ : 0);
           let type = new NodeType(spec.name || "", props, spec.id, flags);
           if (spec.props)
               for (let src of spec.props) {
@@ -7731,14 +8793,14 @@
       /// the prop isn't present on this node.
       prop(prop) { return this.props[prop.id]; }
       /// True when this is the top node of a grammar.
-      get isTop() { return (this.flags & 1 /* Top */) > 0; }
+      get isTop() { return (this.flags & 1 /* NodeFlag.Top */) > 0; }
       /// True when this node is produced by a skip rule.
-      get isSkipped() { return (this.flags & 2 /* Skipped */) > 0; }
+      get isSkipped() { return (this.flags & 2 /* NodeFlag.Skipped */) > 0; }
       /// Indicates whether this is an error node.
-      get isError() { return (this.flags & 4 /* Error */) > 0; }
+      get isError() { return (this.flags & 4 /* NodeFlag.Error */) > 0; }
       /// When true, this node type doesn't correspond to a user-declared
       /// named node, for example because it is used to cache repetition.
-      get isAnonymous() { return (this.flags & 8 /* Anonymous */) > 0; }
+      get isAnonymous() { return (this.flags & 8 /* NodeFlag.Anonymous */) > 0; }
       /// Returns true when this node's name or one of its
       /// [groups](#common.NodeProp^group) matches the given string.
       is(name) {
@@ -7771,7 +8833,7 @@
       }
   }
   /// An empty dummy node type to use when no actual type is available.
-  NodeType.none = new NodeType("", Object.create(null), 0, 8 /* Anonymous */);
+  NodeType.none = new NodeType("", Object.create(null), 0, 8 /* NodeFlag.Anonymous */);
   /// A node set holds a collection of node types. It is used to
   /// compactly represent trees by storing their type ids, rather than a
   /// full pointer to the type object, in a numeric array. Each parser
@@ -7943,15 +9005,16 @@
       /// not have its children iterated over (or `leave` called).
       iterate(spec) {
           let { enter, leave, from = 0, to = this.length } = spec;
-          for (let c = this.cursor((spec.mode || 0) | IterMode.IncludeAnonymous);;) {
+          let mode = spec.mode || 0, anon = (mode & IterMode.IncludeAnonymous) > 0;
+          for (let c = this.cursor(mode | IterMode.IncludeAnonymous);;) {
               let entered = false;
-              if (c.from <= to && c.to >= from && (c.type.isAnonymous || enter(c) !== false)) {
+              if (c.from <= to && c.to >= from && (!anon && c.type.isAnonymous || enter(c) !== false)) {
                   if (c.firstChild())
                       continue;
                   entered = true;
               }
               for (;;) {
-                  if (entered && leave && !c.type.isAnonymous)
+                  if (entered && leave && (anon || !c.type.isAnonymous))
                       leave(c);
                   if (c.nextSibling())
                       break;
@@ -7980,7 +9043,7 @@
       /// which may have children grouped into subtrees with type
       /// [`NodeType.none`](#common.NodeType^none).
       balance(config = {}) {
-          return this.children.length <= 8 /* BranchFactor */ ? this :
+          return this.children.length <= 8 /* Balance.BranchFactor */ ? this :
               balanceRange(NodeType.none, this.children, this.positions, 0, this.children.length, 0, this.length, (children, positions, length) => new Tree(this.type, children, positions, length, this.propValues), config.makeTree || ((children, positions, length) => new Tree(NodeType.none, children, positions, length)));
       }
       /// Build a tree from a postfix-ordered buffer of node information,
@@ -8059,26 +9122,27 @@
           return pick;
       }
       /// @internal
-      slice(startI, endI, from, to) {
+      slice(startI, endI, from) {
           let b = this.buffer;
-          let copy = new Uint16Array(endI - startI);
+          let copy = new Uint16Array(endI - startI), len = 0;
           for (let i = startI, j = 0; i < endI;) {
               copy[j++] = b[i++];
               copy[j++] = b[i++] - from;
-              copy[j++] = b[i++] - from;
+              let to = copy[j++] = b[i++] - from;
               copy[j++] = b[i++] - startI;
+              len = Math.max(len, to);
           }
-          return new TreeBuffer(copy, to - from, this.set);
+          return new TreeBuffer(copy, len, this.set);
       }
   }
   function checkSide(side, pos, from, to) {
       switch (side) {
-          case -2 /* Before */: return from < pos;
-          case -1 /* AtOrBefore */: return to >= pos && from < pos;
-          case 0 /* Around */: return from < pos && to > pos;
-          case 1 /* AtOrAfter */: return from <= pos && to > pos;
-          case 2 /* After */: return to > pos;
-          case 4 /* DontCare */: return true;
+          case -2 /* Side.Before */: return from < pos;
+          case -1 /* Side.AtOrBefore */: return to >= pos && from < pos;
+          case 0 /* Side.Around */: return from < pos && to > pos;
+          case 1 /* Side.AtOrAfter */: return from <= pos && to > pos;
+          case 2 /* Side.After */: return to > pos;
+          case 4 /* Side.DontCare */: return true;
       }
   }
   function enterUnfinishedNodesBefore(node, pos) {
@@ -8168,10 +9232,10 @@
                   return null;
           }
       }
-      get firstChild() { return this.nextChild(0, 1, 0, 4 /* DontCare */); }
-      get lastChild() { return this.nextChild(this._tree.children.length - 1, -1, 0, 4 /* DontCare */); }
-      childAfter(pos) { return this.nextChild(0, 1, pos, 2 /* After */); }
-      childBefore(pos) { return this.nextChild(this._tree.children.length - 1, -1, pos, -2 /* Before */); }
+      get firstChild() { return this.nextChild(0, 1, 0, 4 /* Side.DontCare */); }
+      get lastChild() { return this.nextChild(this._tree.children.length - 1, -1, 0, 4 /* Side.DontCare */); }
+      childAfter(pos) { return this.nextChild(0, 1, pos, 2 /* Side.After */); }
+      childBefore(pos) { return this.nextChild(this._tree.children.length - 1, -1, pos, -2 /* Side.Before */); }
       enter(pos, side, mode = 0) {
           let mounted;
           if (!(mode & IterMode.IgnoreOverlays) && (mounted = this._tree.prop(NodeProp.mounted)) && mounted.overlay) {
@@ -8194,10 +9258,10 @@
           return this._parent ? this._parent.nextSignificantParent() : null;
       }
       get nextSibling() {
-          return this._parent && this.index >= 0 ? this._parent.nextChild(this.index + 1, 1, 0, 4 /* DontCare */) : null;
+          return this._parent && this.index >= 0 ? this._parent.nextChild(this.index + 1, 1, 0, 4 /* Side.DontCare */) : null;
       }
       get prevSibling() {
-          return this._parent && this.index >= 0 ? this._parent.nextChild(this.index - 1, -1, 0, 4 /* DontCare */) : null;
+          return this._parent && this.index >= 0 ? this._parent.nextChild(this.index - 1, -1, 0, 4 /* Side.DontCare */) : null;
       }
       cursor(mode = 0) { return new TreeCursor(this, mode); }
       get tree() { return this._tree; }
@@ -8259,24 +9323,24 @@
       }
   }
   class BufferNode {
+      get name() { return this.type.name; }
+      get from() { return this.context.start + this.context.buffer.buffer[this.index + 1]; }
+      get to() { return this.context.start + this.context.buffer.buffer[this.index + 2]; }
       constructor(context, _parent, index) {
           this.context = context;
           this._parent = _parent;
           this.index = index;
           this.type = context.buffer.set.types[context.buffer.buffer[index]];
       }
-      get name() { return this.type.name; }
-      get from() { return this.context.start + this.context.buffer.buffer[this.index + 1]; }
-      get to() { return this.context.start + this.context.buffer.buffer[this.index + 2]; }
       child(dir, pos, side) {
           let { buffer } = this.context;
           let index = buffer.findChild(this.index + 4, buffer.buffer[this.index + 3], dir, pos - this.context.start, side);
           return index < 0 ? null : new BufferNode(this.context, this, index);
       }
-      get firstChild() { return this.child(1, 0, 4 /* DontCare */); }
-      get lastChild() { return this.child(-1, 0, 4 /* DontCare */); }
-      childAfter(pos) { return this.child(1, pos, 2 /* After */); }
-      childBefore(pos) { return this.child(-1, pos, -2 /* Before */); }
+      get firstChild() { return this.child(1, 0, 4 /* Side.DontCare */); }
+      get lastChild() { return this.child(-1, 0, 4 /* Side.DontCare */); }
+      childAfter(pos) { return this.child(1, pos, 2 /* Side.After */); }
+      childBefore(pos) { return this.child(-1, pos, -2 /* Side.Before */); }
       enter(pos, side, mode = 0) {
           if (mode & IterMode.ExcludeBuffers)
               return null;
@@ -8288,7 +9352,7 @@
           return this._parent || this.context.parent.nextSignificantParent();
       }
       externalSibling(dir) {
-          return this._parent ? null : this.context.parent.nextChild(this.context.index + dir, dir, 0, 4 /* DontCare */);
+          return this._parent ? null : this.context.parent.nextChild(this.context.index + dir, dir, 0, 4 /* Side.DontCare */);
       }
       get nextSibling() {
           let { buffer } = this.context;
@@ -8302,7 +9366,7 @@
           let parentStart = this._parent ? this._parent.index + 4 : 0;
           if (this.index == parentStart)
               return this.externalSibling(-1);
-          return new BufferNode(this.context, this._parent, buffer.findChild(parentStart, this.index, -1, 0, 4 /* DontCare */));
+          return new BufferNode(this.context, this._parent, buffer.findChild(parentStart, this.index, -1, 0, 4 /* Side.DontCare */));
       }
       cursor(mode = 0) { return new TreeCursor(this, mode); }
       get tree() { return null; }
@@ -8311,8 +9375,8 @@
           let { buffer } = this.context;
           let startI = this.index + 4, endI = buffer.buffer[this.index + 3];
           if (endI > startI) {
-              let from = buffer.buffer[this.index + 1], to = buffer.buffer[this.index + 2];
-              children.push(buffer.slice(startI, endI, from, to));
+              let from = buffer.buffer[this.index + 1];
+              children.push(buffer.slice(startI, endI, from));
               positions.push(0);
           }
           return new Tree(this.type, children, positions, this.to - this.from);
@@ -8339,6 +9403,8 @@
   /// A tree cursor object focuses on a given node in a syntax tree, and
   /// allows you to move to adjacent nodes.
   class TreeCursor {
+      /// Shorthand for `.type.name`.
+      get name() { return this.type.name; }
       /// @internal
       constructor(node, 
       /// @internal
@@ -8362,8 +9428,6 @@
               this.yieldBuf(node.index);
           }
       }
-      /// Shorthand for `.type.name`.
-      get name() { return this.type.name; }
       yieldNode(node) {
           if (!node)
               return false;
@@ -8408,13 +9472,13 @@
       }
       /// Move the cursor to this node's first child. When this returns
       /// false, the node has no child, and the cursor has not been moved.
-      firstChild() { return this.enterChild(1, 0, 4 /* DontCare */); }
+      firstChild() { return this.enterChild(1, 0, 4 /* Side.DontCare */); }
       /// Move the cursor to this node's last child.
-      lastChild() { return this.enterChild(-1, 0, 4 /* DontCare */); }
+      lastChild() { return this.enterChild(-1, 0, 4 /* Side.DontCare */); }
       /// Move the cursor to the first child that ends after `pos`.
-      childAfter(pos) { return this.enterChild(1, pos, 2 /* After */); }
+      childAfter(pos) { return this.enterChild(1, pos, 2 /* Side.After */); }
       /// Move to the last child that starts before `pos`.
-      childBefore(pos) { return this.enterChild(-1, pos, -2 /* Before */); }
+      childBefore(pos) { return this.enterChild(-1, pos, -2 /* Side.Before */); }
       /// Move the cursor to the child around `pos`. If side is -1 the
       /// child may end at that position, when 1 it may start there. This
       /// will also enter [overlaid](#common.MountedTree.overlay)
@@ -8440,19 +9504,19 @@
           if (!this.buffer)
               return !this._tree._parent ? false
                   : this.yield(this._tree.index < 0 ? null
-                      : this._tree._parent.nextChild(this._tree.index + dir, dir, 0, 4 /* DontCare */, this.mode));
+                      : this._tree._parent.nextChild(this._tree.index + dir, dir, 0, 4 /* Side.DontCare */, this.mode));
           let { buffer } = this.buffer, d = this.stack.length - 1;
           if (dir < 0) {
               let parentStart = d < 0 ? 0 : this.stack[d] + 4;
               if (this.index != parentStart)
-                  return this.yieldBuf(buffer.findChild(parentStart, this.index, -1, 0, 4 /* DontCare */));
+                  return this.yieldBuf(buffer.findChild(parentStart, this.index, -1, 0, 4 /* Side.DontCare */));
           }
           else {
               let after = buffer.buffer[this.index + 3];
               if (after < (d < 0 ? buffer.buffer.length : buffer.buffer[this.stack[d] + 3]))
                   return this.yieldBuf(after);
           }
-          return d < 0 ? this.yield(this.buffer.parent.nextChild(this.buffer.index + dir, dir, 0, 4 /* DontCare */, this.mode)) : false;
+          return d < 0 ? this.yield(this.buffer.parent.nextChild(this.buffer.index + dir, dir, 0, 4 /* Side.DontCare */, this.mode)) : false;
       }
       /// Move to this node's next sibling, if any.
       nextSibling() { return this.sibling(1); }
@@ -8489,7 +9553,7 @@
           return true;
       }
       move(dir, enter) {
-          if (enter && this.enterChild(dir, 0, 4 /* DontCare */))
+          if (enter && this.enterChild(dir, 0, 4 /* Side.DontCare */))
               return true;
           for (;;) {
               if (this.sibling(dir))
@@ -8499,7 +9563,7 @@
           }
       }
       /// Move to the next node in a
-      /// [pre-order](https://en.wikipedia.org/wiki/Tree_traversal#Pre-order_(NLR))
+      /// [pre-order](https://en.wikipedia.org/wiki/Tree_traversal#Pre-order,_NLR)
       /// traversal, going from a node to its first child or, if the
       /// current node is empty or `enter` is false, its next sibling or
       /// the next sibling of the first parent node that has one.
@@ -8615,17 +9679,17 @@
           let lookAheadAtStart = lookAhead;
           while (size < 0) {
               cursor.next();
-              if (size == -1 /* Reuse */) {
+              if (size == -1 /* SpecialRecord.Reuse */) {
                   let node = reused[id];
                   children.push(node);
                   positions.push(start - parentStart);
                   return;
               }
-              else if (size == -3 /* ContextChange */) { // Context change
+              else if (size == -3 /* SpecialRecord.ContextChange */) { // Context change
                   contextHash = id;
                   return;
               }
-              else if (size == -4 /* LookAhead */) {
+              else if (size == -4 /* SpecialRecord.LookAhead */) {
                   lookAhead = id;
                   return;
               }
@@ -8742,7 +9806,7 @@
               fork.next();
               while (fork.pos > startPos) {
                   if (fork.size < 0) {
-                      if (fork.size == -3 /* ContextChange */)
+                      if (fork.size == -3 /* SpecialRecord.ContextChange */)
                           localSkipped += 4;
                       else
                           break scan;
@@ -8778,10 +9842,10 @@
               buffer[--index] = start - bufferStart;
               buffer[--index] = id;
           }
-          else if (size == -3 /* ContextChange */) {
+          else if (size == -3 /* SpecialRecord.ContextChange */) {
               contextHash = id;
           }
-          else if (size == -4 /* LookAhead */) {
+          else if (size == -4 /* SpecialRecord.LookAhead */) {
               lookAhead = id;
           }
           return index;
@@ -8828,7 +9892,7 @@
       let total = 0;
       for (let i = from; i < to; i++)
           total += nodeSize(balanceType, children[i]);
-      let maxChild = Math.ceil((total * 1.5) / 8 /* BranchFactor */);
+      let maxChild = Math.ceil((total * 1.5) / 8 /* Balance.BranchFactor */);
       let localChildren = [], localPositions = [];
       function divide(children, positions, from, to, offset) {
           for (let i = from; i < to;) {
@@ -8889,16 +9953,16 @@
           this.to = to;
           this.tree = tree;
           this.offset = offset;
-          this.open = (openStart ? 1 /* Start */ : 0) | (openEnd ? 2 /* End */ : 0);
+          this.open = (openStart ? 1 /* Open.Start */ : 0) | (openEnd ? 2 /* Open.End */ : 0);
       }
       /// Whether the start of the fragment represents the start of a
       /// parse, or the end of a change. (In the second case, it may not
       /// be safe to reuse some nodes at the start, depending on the
       /// parsing algorithm.)
-      get openStart() { return (this.open & 1 /* Start */) > 0; }
+      get openStart() { return (this.open & 1 /* Open.Start */) > 0; }
       /// Whether the end of the fragment represents the end of a
       /// full-document parse, or the start of a change.
-      get openEnd() { return (this.open & 2 /* End */) > 0; }
+      get openEnd() { return (this.open & 2 /* Open.End */) > 0; }
       /// Create a set of fragments from a freshly parsed tree, or update
       /// an existing set of fragments by replacing the ones that overlap
       /// with a tree with content from the new tree. When `partial` is
@@ -8957,7 +10021,7 @@
       startParse(input, fragments, ranges) {
           if (typeof input == "string")
               input = new StringInput(input);
-          ranges = !ranges ? [new Range$3(0, input.length)] : ranges.length ? ranges.map(r => new Range$3(r.from, r.to)) : [new Range$3(0, 0)];
+          ranges = !ranges ? [new Range$2(0, input.length)] : ranges.length ? ranges.map(r => new Range$2(r.from, r.to)) : [new Range$2(0, 0)];
           return this.createParse(input, fragments || [], ranges);
       }
       /// Run a full parse, returning the resulting tree.
@@ -9066,7 +10130,8 @@
       // Apply a reduce action
       /// @internal
       reduce(action) {
-          let depth = action >> 19 /* ReduceDepthShift */, type = action & 65535 /* ValueMask */;
+          var _a;
+          let depth = action >> 19 /* Action.ReduceDepthShift */, type = action & 65535 /* Action.ValueMask */;
           let { parser } = this.p;
           let dPrec = parser.dynamicPrecedence(type);
           if (dPrec)
@@ -9085,15 +10150,29 @@
           // consume two extra frames (the dummy parent node for the skipped
           // expression and the state that we'll be staying in, which should
           // be moved to `this.state`).
-          let base = this.stack.length - ((depth - 1) * 3) - (action & 262144 /* StayFlag */ ? 6 : 0);
-          let start = this.stack[base - 2];
-          let bufferBase = this.stack[base - 1], count = this.bufferBase + this.buffer.length - bufferBase;
+          let base = this.stack.length - ((depth - 1) * 3) - (action & 262144 /* Action.StayFlag */ ? 6 : 0);
+          let start = base ? this.stack[base - 2] : this.p.ranges[0].from, size = this.reducePos - start;
+          // This is a kludge to try and detect overly deep left-associative
+          // trees, which will not increase the parse stack depth and thus
+          // won't be caught by the regular stack-depth limit check.
+          if (size >= 2000 /* Recover.MinBigReduction */ && !((_a = this.p.parser.nodeSet.types[type]) === null || _a === void 0 ? void 0 : _a.isAnonymous)) {
+              if (start == this.p.lastBigReductionStart) {
+                  this.p.bigReductionCount++;
+                  this.p.lastBigReductionSize = size;
+              }
+              else if (this.p.lastBigReductionSize < size) {
+                  this.p.bigReductionCount = 1;
+                  this.p.lastBigReductionStart = start;
+                  this.p.lastBigReductionSize = size;
+              }
+          }
+          let bufferBase = base ? this.stack[base - 1] : 0, count = this.bufferBase + this.buffer.length - bufferBase;
           // Store normal terms or `R -> R R` repeat reductions
-          if (type < parser.minRepeatTerm || (action & 131072 /* RepeatFlag */)) {
-              let pos = parser.stateFlag(this.state, 1 /* Skipped */) ? this.pos : this.reducePos;
+          if (type < parser.minRepeatTerm || (action & 131072 /* Action.RepeatFlag */)) {
+              let pos = parser.stateFlag(this.state, 1 /* StateFlag.Skipped */) ? this.pos : this.reducePos;
               this.storeNode(type, start, pos, count + 4, true);
           }
-          if (action & 262144 /* StayFlag */) {
+          if (action & 262144 /* Action.StayFlag */) {
               this.state = this.stack[base];
           }
           else {
@@ -9107,7 +10186,7 @@
       // Shift a value into the buffer
       /// @internal
       storeNode(term, start, end, size = 4, isReduce = false) {
-          if (term == 0 /* Err */ &&
+          if (term == 0 /* Term.Err */ &&
               (!this.stack.length || this.stack[this.stack.length - 1] < this.buffer.length + this.bufferBase)) {
               // Try to omit/merge adjacent error nodes
               let cur = this, top = this.buffer.length;
@@ -9115,7 +10194,7 @@
                   top = cur.bufferBase - cur.parent.bufferBase;
                   cur = cur.parent;
               }
-              if (top > 0 && cur.buffer[top - 4] == 0 /* Err */ && cur.buffer[top - 1] > -1) {
+              if (top > 0 && cur.buffer[top - 4] == 0 /* Term.Err */ && cur.buffer[top - 1] > -1) {
                   if (start == end)
                       return;
                   if (cur.buffer[top - 2] >= start) {
@@ -9129,7 +10208,7 @@
           }
           else { // There may be skipped nodes that have to be moved forward
               let index = this.buffer.length;
-              if (index > 0 && this.buffer[index - 4] != 0 /* Err */)
+              if (index > 0 && this.buffer[index - 4] != 0 /* Term.Err */)
                   while (index > 0 && this.buffer[index - 2] > end) {
                       // Move this record forward
                       this.buffer[index] = this.buffer[index - 4];
@@ -9150,14 +10229,14 @@
       /// @internal
       shift(action, next, nextEnd) {
           let start = this.pos;
-          if (action & 131072 /* GotoFlag */) {
-              this.pushState(action & 65535 /* ValueMask */, this.pos);
+          if (action & 131072 /* Action.GotoFlag */) {
+              this.pushState(action & 65535 /* Action.ValueMask */, this.pos);
           }
-          else if ((action & 262144 /* StayFlag */) == 0) { // Regular shift
+          else if ((action & 262144 /* Action.StayFlag */) == 0) { // Regular shift
               let nextState = action, { parser } = this.p;
               if (nextEnd > this.pos || next <= parser.maxNode) {
                   this.pos = nextEnd;
-                  if (!parser.stateFlag(nextState, 1 /* Skipped */))
+                  if (!parser.stateFlag(nextState, 1 /* StateFlag.Skipped */))
                       this.reducePos = nextEnd;
               }
               this.pushState(nextState, start);
@@ -9175,7 +10254,7 @@
       // Apply an action
       /// @internal
       apply(action, next, nextEnd) {
-          if (action & 65536 /* ReduceFlag */)
+          if (action & 65536 /* Action.ReduceFlag */)
               this.reduce(action);
           else
               this.shift(action, next, nextEnd);
@@ -9220,9 +10299,9 @@
           let isNode = next <= this.p.parser.maxNode;
           if (isNode)
               this.storeNode(next, this.pos, nextEnd, 4);
-          this.storeNode(0 /* Err */, this.pos, nextEnd, isNode ? 8 : 4);
+          this.storeNode(0 /* Term.Err */, this.pos, nextEnd, isNode ? 8 : 4);
           this.pos = this.reducePos = nextEnd;
-          this.score -= 190 /* Delete */;
+          this.score -= 190 /* Recover.Delete */;
       }
       /// Check if the given term would be able to be shifted (optionally
       /// after some reductions) on this stack. This can be useful for
@@ -9230,10 +10309,10 @@
       /// given token when it applies.
       canShift(term) {
           for (let sim = new SimulatedStack(this);;) {
-              let action = this.p.parser.stateSlot(sim.state, 4 /* DefaultReduce */) || this.p.parser.hasAction(sim.state, term);
+              let action = this.p.parser.stateSlot(sim.state, 4 /* ParseState.DefaultReduce */) || this.p.parser.hasAction(sim.state, term);
               if (action == 0)
                   return false;
-              if ((action & 65536 /* ReduceFlag */) == 0)
+              if ((action & 65536 /* Action.ReduceFlag */) == 0)
                   return true;
               sim.reduce(action);
           }
@@ -9242,17 +10321,17 @@
       // inserts some missing token or rule.
       /// @internal
       recoverByInsert(next) {
-          if (this.stack.length >= 300 /* MaxInsertStackDepth */)
+          if (this.stack.length >= 300 /* Recover.MaxInsertStackDepth */)
               return [];
           let nextStates = this.p.parser.nextStates(this.state);
-          if (nextStates.length > 4 /* MaxNext */ << 1 || this.stack.length >= 120 /* DampenInsertStackDepth */) {
+          if (nextStates.length > 4 /* Recover.MaxNext */ << 1 || this.stack.length >= 120 /* Recover.DampenInsertStackDepth */) {
               let best = [];
               for (let i = 0, s; i < nextStates.length; i += 2) {
                   if ((s = nextStates[i + 1]) != this.state && this.p.parser.hasAction(s, next))
                       best.push(nextStates[i], s);
               }
-              if (this.stack.length < 120 /* DampenInsertStackDepth */)
-                  for (let i = 0; best.length < 4 /* MaxNext */ << 1 && i < nextStates.length; i += 2) {
+              if (this.stack.length < 120 /* Recover.DampenInsertStackDepth */)
+                  for (let i = 0; best.length < 4 /* Recover.MaxNext */ << 1 && i < nextStates.length; i += 2) {
                       let s = nextStates[i + 1];
                       if (!best.some((v, i) => (i & 1) && v == s))
                           best.push(nextStates[i], s);
@@ -9260,15 +10339,15 @@
               nextStates = best;
           }
           let result = [];
-          for (let i = 0; i < nextStates.length && result.length < 4 /* MaxNext */; i += 2) {
+          for (let i = 0; i < nextStates.length && result.length < 4 /* Recover.MaxNext */; i += 2) {
               let s = nextStates[i + 1];
               if (s == this.state)
                   continue;
               let stack = this.split();
               stack.pushState(s, this.pos);
-              stack.storeNode(0 /* Err */, stack.pos, stack.pos, 4, true);
+              stack.storeNode(0 /* Term.Err */, stack.pos, stack.pos, 4, true);
               stack.shiftContext(nextStates[i], this.pos);
-              stack.score -= 200 /* Insert */;
+              stack.score -= 200 /* Recover.Insert */;
               result.push(stack);
           }
           return result;
@@ -9277,27 +10356,59 @@
       // be done.
       /// @internal
       forceReduce() {
-          let reduce = this.p.parser.stateSlot(this.state, 5 /* ForcedReduce */);
-          if ((reduce & 65536 /* ReduceFlag */) == 0)
-              return false;
           let { parser } = this.p;
+          let reduce = parser.stateSlot(this.state, 5 /* ParseState.ForcedReduce */);
+          if ((reduce & 65536 /* Action.ReduceFlag */) == 0)
+              return false;
           if (!parser.validAction(this.state, reduce)) {
-              let depth = reduce >> 19 /* ReduceDepthShift */, term = reduce & 65535 /* ValueMask */;
+              let depth = reduce >> 19 /* Action.ReduceDepthShift */, term = reduce & 65535 /* Action.ValueMask */;
               let target = this.stack.length - depth * 3;
-              if (target < 0 || parser.getGoto(this.stack[target], term, false) < 0)
-                  return false;
-              this.storeNode(0 /* Err */, this.reducePos, this.reducePos, 4, true);
-              this.score -= 100 /* Reduce */;
+              if (target < 0 || parser.getGoto(this.stack[target], term, false) < 0) {
+                  let backup = this.findForcedReduction();
+                  if (backup == null)
+                      return false;
+                  reduce = backup;
+              }
+              this.storeNode(0 /* Term.Err */, this.pos, this.pos, 4, true);
+              this.score -= 100 /* Recover.Reduce */;
           }
           this.reducePos = this.pos;
           this.reduce(reduce);
           return true;
       }
+      /// Try to scan through the automaton to find some kind of reduction
+      /// that can be applied. Used when the regular ForcedReduce field
+      /// isn't a valid action. @internal
+      findForcedReduction() {
+          let { parser } = this.p, seen = [];
+          let explore = (state, depth) => {
+              if (seen.includes(state))
+                  return;
+              seen.push(state);
+              return parser.allActions(state, (action) => {
+                  if (action & (262144 /* Action.StayFlag */ | 131072 /* Action.GotoFlag */)) ;
+                  else if (action & 65536 /* Action.ReduceFlag */) {
+                      let rDepth = (action >> 19 /* Action.ReduceDepthShift */) - depth;
+                      if (rDepth > 1) {
+                          let term = action & 65535 /* Action.ValueMask */, target = this.stack.length - rDepth * 3;
+                          if (target >= 0 && parser.getGoto(this.stack[target], term, false) >= 0)
+                              return (rDepth << 19 /* Action.ReduceDepthShift */) | 65536 /* Action.ReduceFlag */ | term;
+                      }
+                  }
+                  else {
+                      let found = explore(action, depth + 1);
+                      if (found != null)
+                          return found;
+                  }
+              });
+          };
+          return explore(this.state, 0);
+      }
       /// @internal
       forceAll() {
-          while (!this.p.parser.stateFlag(this.state, 2 /* Accepting */)) {
+          while (!this.p.parser.stateFlag(this.state, 2 /* StateFlag.Accepting */)) {
               if (!this.forceReduce()) {
-                  this.storeNode(0 /* Err */, this.pos, this.pos, 4, true);
+                  this.storeNode(0 /* Term.Err */, this.pos, this.pos, 4, true);
                   break;
               }
           }
@@ -9310,8 +10421,8 @@
           if (this.stack.length != 3)
               return false;
           let { parser } = this.p;
-          return parser.data[parser.stateSlot(this.state, 1 /* Actions */)] == 65535 /* End */ &&
-              !parser.stateSlot(this.state, 4 /* DefaultReduce */);
+          return parser.data[parser.stateSlot(this.state, 1 /* ParseState.Actions */)] == 65535 /* Seq.End */ &&
+              !parser.stateSlot(this.state, 4 /* ParseState.DefaultReduce */);
       }
       /// Restart the stack (put it back in its start state). Only safe
       /// when this.stack.length == 3 (state is directly below the top
@@ -9346,13 +10457,13 @@
       emitContext() {
           let last = this.buffer.length - 1;
           if (last < 0 || this.buffer[last] != -3)
-              this.buffer.push(this.curContext.hash, this.reducePos, this.reducePos, -3);
+              this.buffer.push(this.curContext.hash, this.pos, this.pos, -3);
       }
       /// @internal
       emitLookAhead() {
           let last = this.buffer.length - 1;
           if (last < 0 || this.buffer[last] != -4)
-              this.buffer.push(this.lookAhead, this.reducePos, this.reducePos, -4);
+              this.buffer.push(this.lookAhead, this.pos, this.pos, -4);
       }
       updateContext(context) {
           if (context != this.curContext.context) {
@@ -9392,6 +10503,7 @@
       Recover[Recover["MaxNext"] = 4] = "MaxNext";
       Recover[Recover["MaxInsertStackDepth"] = 300] = "MaxInsertStackDepth";
       Recover[Recover["DampenInsertStackDepth"] = 120] = "DampenInsertStackDepth";
+      Recover[Recover["MinBigReduction"] = 2000] = "MinBigReduction";
   })(Recover || (Recover = {}));
   // Used to cheaply run some reductions to scan ahead without mutating
   // an entire stack
@@ -9403,7 +10515,7 @@
           this.base = this.stack.length;
       }
       reduce(action) {
-          let term = action & 65535 /* ValueMask */, depth = action >> 19 /* ReduceDepthShift */;
+          let term = action & 65535 /* Action.ValueMask */, depth = action >> 19 /* Action.ReduceDepthShift */;
           if (depth == 0) {
               if (this.stack == this.start.stack)
                   this.stack = this.stack.slice();
@@ -9454,6 +10566,42 @@
       }
   }
 
+  // See lezer-generator/src/encode.ts for comments about the encoding
+  // used here
+  function decodeArray(input, Type = Uint16Array) {
+      if (typeof input != "string")
+          return input;
+      let array = null;
+      for (let pos = 0, out = 0; pos < input.length;) {
+          let value = 0;
+          for (;;) {
+              let next = input.charCodeAt(pos++), stop = false;
+              if (next == 126 /* Encode.BigValCode */) {
+                  value = 65535 /* Encode.BigVal */;
+                  break;
+              }
+              if (next >= 92 /* Encode.Gap2 */)
+                  next--;
+              if (next >= 34 /* Encode.Gap1 */)
+                  next--;
+              let digit = next - 32 /* Encode.Start */;
+              if (digit >= 46 /* Encode.Base */) {
+                  digit -= 46 /* Encode.Base */;
+                  stop = true;
+              }
+              value += digit;
+              if (stop)
+                  break;
+              value *= 46 /* Encode.Base */;
+          }
+          if (array)
+              array[out++] = value;
+          else
+              array = new Type(value);
+      }
+      return array;
+  }
+
   class CachedToken {
       constructor() {
           this.start = -1;
@@ -9678,9 +10826,13 @@
           this.data = data;
           this.id = id;
       }
-      token(input, stack) { readToken(this.data, input, stack, this.id); }
+      token(input, stack) {
+          let { parser } = stack.p;
+          readToken(this.data, input, stack, this.id, parser.data, parser.tokenPrecTable);
+      }
   }
   TokenGroup.prototype.contextual = TokenGroup.prototype.fallback = TokenGroup.prototype.extend = false;
+  TokenGroup.prototype.fallback = TokenGroup.prototype.extend = false;
   /// `@external tokens` declarations in the grammar should resolve to
   /// an instance of this class.
   class ExternalTokenizer {
@@ -9718,8 +10870,8 @@
   // This function interprets that data, running through a stream as
   // long as new states with the a matching group mask can be reached,
   // and updating `input.token` when it matches a token.
-  function readToken(data, input, stack, group) {
-      let state = 0, groupMask = 1 << group, { parser } = stack.p, { dialect } = parser;
+  function readToken(data, input, stack, group, precTable, precOffset) {
+      let state = 0, groupMask = 1 << group, { dialect } = stack.p.parser;
       scan: for (;;) {
           if ((groupMask & data[state]) == 0)
               break;
@@ -9731,14 +10883,15 @@
               if ((data[i + 1] & groupMask) > 0) {
                   let term = data[i];
                   if (dialect.allows(term) &&
-                      (input.token.value == -1 || input.token.value == term || parser.overrides(term, input.token.value))) {
+                      (input.token.value == -1 || input.token.value == term ||
+                          overrides(term, input.token.value, precTable, precOffset))) {
                       input.acceptToken(term);
                       break;
                   }
               }
           let next = input.next, low = 0, high = data[state + 2];
           // Special case for EOF
-          if (input.next < 0 && high > low && data[accEnd + high * 3 - 3] == 65535 /* End */ && data[accEnd + high * 3 - 3] == 65535 /* End */) {
+          if (input.next < 0 && high > low && data[accEnd + high * 3 - 3] == 65535 /* Seq.End */ && data[accEnd + high * 3 - 3] == 65535 /* Seq.End */) {
               state = data[accEnd + high * 3 - 1];
               continue scan;
           }
@@ -9760,41 +10913,15 @@
           break;
       }
   }
-
-  // See lezer-generator/src/encode.ts for comments about the encoding
-  // used here
-  function decodeArray(input, Type = Uint16Array) {
-      if (typeof input != "string")
-          return input;
-      let array = null;
-      for (let pos = 0, out = 0; pos < input.length;) {
-          let value = 0;
-          for (;;) {
-              let next = input.charCodeAt(pos++), stop = false;
-              if (next == 126 /* BigValCode */) {
-                  value = 65535 /* BigVal */;
-                  break;
-              }
-              if (next >= 92 /* Gap2 */)
-                  next--;
-              if (next >= 34 /* Gap1 */)
-                  next--;
-              let digit = next - 32 /* Start */;
-              if (digit >= 46 /* Base */) {
-                  digit -= 46 /* Base */;
-                  stop = true;
-              }
-              value += digit;
-              if (stop)
-                  break;
-              value *= 46 /* Base */;
-          }
-          if (array)
-              array[out++] = value;
-          else
-              array = new Type(value);
-      }
-      return array;
+  function findOffset(data, start, term) {
+      for (let i = start, next; (next = data[i]) != 65535 /* Seq.End */; i++)
+          if (next == term)
+              return i - start;
+      return -1;
+  }
+  function overrides(token, prev, tableData, tableOffset) {
+      let iPrev = findOffset(tableData, tableOffset, prev);
+      return iPrev < 0 || findOffset(tableData, tableOffset, token) < iPrev;
   }
 
   // Environment variable used to control console output
@@ -9811,8 +10938,8 @@
           if (!(side < 0 ? cursor.childBefore(pos) : cursor.childAfter(pos)))
               for (;;) {
                   if ((side < 0 ? cursor.to < pos : cursor.from > pos) && !cursor.type.isError)
-                      return side < 0 ? Math.max(0, Math.min(cursor.to - 1, pos - 25 /* Margin */))
-                          : Math.min(tree.length, Math.max(cursor.from + 1, pos + 25 /* Margin */));
+                      return side < 0 ? Math.max(0, Math.min(cursor.to - 1, pos - 25 /* Safety.Margin */))
+                          : Math.min(tree.length, Math.max(cursor.from + 1, pos + 25 /* Safety.Margin */));
                   if (side < 0 ? cursor.prevSibling() : cursor.nextSibling())
                       break;
                   if (!cursor.parent())
@@ -9916,7 +11043,7 @@
           let actionIndex = 0;
           let main = null;
           let { parser } = stack.p, { tokenizers } = parser;
-          let mask = parser.stateSlot(stack.state, 3 /* TokenizerMask */);
+          let mask = parser.stateSlot(stack.state, 3 /* ParseState.TokenizerMask */);
           let context = stack.curContext ? stack.curContext.hash : 0;
           let lookAhead = 0;
           for (let i = 0; i < tokenizers.length; i++) {
@@ -9930,9 +11057,9 @@
                   token.mask = mask;
                   token.context = context;
               }
-              if (token.lookAhead > token.end + 25 /* Margin */)
+              if (token.lookAhead > token.end + 25 /* Safety.Margin */)
                   lookAhead = Math.max(token.lookAhead, lookAhead);
-              if (token.value != 0 /* Err */) {
+              if (token.value != 0 /* Term.Err */) {
                   let startIndex = actionIndex;
                   if (token.extended > -1)
                       actionIndex = this.addActions(stack, token.extended, token.end, actionIndex);
@@ -9963,7 +11090,7 @@
           let main = new CachedToken, { pos, p } = stack;
           main.start = pos;
           main.end = Math.min(pos + 1, p.stream.end);
-          main.value = pos == p.stream.end ? p.parser.eofTerm : 0 /* Err */;
+          main.value = pos == p.stream.end ? p.parser.eofTerm : 0 /* Term.Err */;
           return main;
       }
       updateCachedToken(token, tokenizer, stack) {
@@ -9975,7 +11102,7 @@
                   if (parser.specialized[i] == token.value) {
                       let result = parser.specializers[i](this.stream.read(token.start, token.end), stack);
                       if (result >= 0 && stack.p.parser.dialect.allows(result >> 1)) {
-                          if ((result & 1) == 0 /* Specialize */)
+                          if ((result & 1) == 0 /* Specialize.Specialize */)
                               token.value = result >> 1;
                           else
                               token.extended = result >> 1;
@@ -9984,7 +11111,7 @@
                   }
           }
           else {
-              token.value = 0 /* Err */;
+              token.value = 0 /* Term.Err */;
               token.end = this.stream.clipPos(start + 1);
           }
       }
@@ -10001,13 +11128,13 @@
       addActions(stack, token, end, index) {
           let { state } = stack, { parser } = stack.p, { data } = parser;
           for (let set = 0; set < 2; set++) {
-              for (let i = parser.stateSlot(state, set ? 2 /* Skip */ : 1 /* Actions */);; i += 3) {
-                  if (data[i] == 65535 /* End */) {
-                      if (data[i + 1] == 1 /* Next */) {
+              for (let i = parser.stateSlot(state, set ? 2 /* ParseState.Skip */ : 1 /* ParseState.Actions */);; i += 3) {
+                  if (data[i] == 65535 /* Seq.End */) {
+                      if (data[i + 1] == 1 /* Seq.Next */) {
                           i = pair(data, i + 2);
                       }
                       else {
-                          if (index == 0 && data[i + 1] == 2 /* Other */)
+                          if (index == 0 && data[i + 1] == 2 /* Seq.Other */)
                               index = this.putAction(pair(data, i + 2), token, end, index);
                           break;
                       }
@@ -10032,6 +11159,11 @@
       // on recursive traversal.
       Rec[Rec["CutDepth"] = 15000] = "CutDepth";
       Rec[Rec["CutTo"] = 9000] = "CutTo";
+      Rec[Rec["MaxLeftAssociativeReductionCount"] = 300] = "MaxLeftAssociativeReductionCount";
+      // The maximum number of non-recovering stacks to explore (to avoid
+      // getting bogged down with exponentially multiplying stacks in
+      // ambiguous content)
+      Rec[Rec["MaxStackCount"] = 12] = "MaxStackCount";
   })(Rec || (Rec = {}));
   class Parse {
       constructor(parser, input, fragments, ranges) {
@@ -10043,6 +11175,9 @@
           this.minStackPos = 0;
           this.reused = [];
           this.stoppedAt = null;
+          this.lastBigReductionStart = -1;
+          this.lastBigReductionSize = 0;
+          this.bigReductionCount = 0;
           this.stream = new InputStream(input, ranges);
           this.tokens = new TokenCache(parser, this.stream);
           this.topTerm = parser.top[1];
@@ -10065,6 +11200,18 @@
           // This will hold stacks beyond `pos`.
           let newStacks = this.stacks = [];
           let stopped, stoppedTokens;
+          // If a large amount of reductions happened with the same start
+          // position, force the stack out of that production in order to
+          // avoid creating a tree too deep to recurse through.
+          // (This is an ugly kludge, because unfortunately there is no
+          // straightforward, cheap way to check for this happening, due to
+          // the history of reductions only being available in an
+          // expensive-to-access format in the stack buffers.)
+          if (this.bigReductionCount > 300 /* Rec.MaxLeftAssociativeReductionCount */ && stacks.length == 1) {
+              let [s] = stacks;
+              while (s.forceReduce() && s.stack.length && s.stack[s.stack.length - 2] >= this.lastBigReductionStart) { }
+              this.bigReductionCount = this.lastBigReductionSize = 0;
+          }
           // Keep advancing any stacks at `pos` until they either move
           // forward or can't be advanced. Gather stacks that can't be
           // advanced further in `stopped`.
@@ -10100,7 +11247,7 @@
                   throw new SyntaxError("No parse at " + pos);
               }
               if (!this.recovering)
-                  this.recovering = 5 /* Distance */;
+                  this.recovering = 5 /* Rec.Distance */;
           }
           if (this.recovering && stopped) {
               let finished = this.stoppedAt != null && stopped[0].pos > this.stoppedAt ? stopped[0]
@@ -10109,7 +11256,7 @@
                   return this.stackToTree(finished.forceAll());
           }
           if (this.recovering) {
-              let maxRemaining = this.recovering == 1 ? 1 : this.recovering * 3 /* MaxRemainingPerStep */;
+              let maxRemaining = this.recovering == 1 ? 1 : this.recovering * 3 /* Rec.MaxRemainingPerStep */;
               if (newStacks.length > maxRemaining) {
                   newStacks.sort((a, b) => b.score - a.score);
                   while (newStacks.length > maxRemaining)
@@ -10127,7 +11274,7 @@
                   for (let j = i + 1; j < newStacks.length; j++) {
                       let other = newStacks[j];
                       if (stack.sameState(other) ||
-                          stack.buffer.length > 500 /* MinBufferLengthPrune */ && other.buffer.length > 500 /* MinBufferLengthPrune */) {
+                          stack.buffer.length > 500 /* Rec.MinBufferLengthPrune */ && other.buffer.length > 500 /* Rec.MinBufferLengthPrune */) {
                           if (((stack.score - other.score) || (stack.buffer.length - other.buffer.length)) > 0) {
                               newStacks.splice(j--, 1);
                           }
@@ -10138,6 +11285,8 @@
                       }
                   }
               }
+              if (newStacks.length > 12 /* Rec.MaxStackCount */)
+                  newStacks.splice(12 /* Rec.MaxStackCount */, newStacks.length - 12 /* Rec.MaxStackCount */);
           }
           this.minStackPos = newStacks[0].pos;
           for (let i = 1; i < newStacks.length; i++)
@@ -10178,15 +11327,15 @@
                       break;
               }
           }
-          let defaultReduce = parser.stateSlot(stack.state, 4 /* DefaultReduce */);
+          let defaultReduce = parser.stateSlot(stack.state, 4 /* ParseState.DefaultReduce */);
           if (defaultReduce > 0) {
               stack.reduce(defaultReduce);
               if (verbose)
-                  console.log(base + this.stackID(stack) + ` (via always-reduce ${parser.getName(defaultReduce & 65535 /* ValueMask */)})`);
+                  console.log(base + this.stackID(stack) + ` (via always-reduce ${parser.getName(defaultReduce & 65535 /* Action.ValueMask */)})`);
               return true;
           }
-          if (stack.stack.length >= 15000 /* CutDepth */) {
-              while (stack.stack.length > 9000 /* CutTo */ && stack.forceReduce()) { }
+          if (stack.stack.length >= 15000 /* Rec.CutDepth */) {
+              while (stack.stack.length > 9000 /* Rec.CutTo */ && stack.forceReduce()) { }
           }
           let actions = this.tokens.getActions(stack);
           for (let i = 0; i < actions.length;) {
@@ -10195,8 +11344,8 @@
               let localStack = last ? stack : stack.split();
               localStack.apply(action, term, end);
               if (verbose)
-                  console.log(base + this.stackID(localStack) + ` (via ${(action & 65536 /* ReduceFlag */) == 0 ? "shift"
-                    : `reduce of ${parser.getName(action & 65535 /* ValueMask */)}`} for ${parser.getName(term)} @ ${start}${localStack == stack ? "" : ", split"})`);
+                  console.log(base + this.stackID(localStack) + ` (via ${(action & 65536 /* Action.ReduceFlag */) == 0 ? "shift"
+                    : `reduce of ${parser.getName(action & 65535 /* Action.ValueMask */)}`} for ${parser.getName(term)} @ ${start}${localStack == stack ? "" : ", split"})`);
               if (last)
                   return true;
               else if (localStack.pos > start)
@@ -10237,7 +11386,7 @@
                       continue;
               }
               let force = stack.split(), forceBase = base;
-              for (let j = 0; force.forceReduce() && j < 10 /* ForceReduceLimit */; j++) {
+              for (let j = 0; force.forceReduce() && j < 10 /* Rec.ForceReduceLimit */; j++) {
                   if (verbose)
                       console.log(forceBase + this.stackID(force) + " (via force-reduce)");
                   let done = this.advanceFully(force, newStacks);
@@ -10254,7 +11403,7 @@
               if (this.stream.end > stack.pos) {
                   if (tokenEnd == stack.pos) {
                       tokenEnd++;
-                      token = 0 /* Err */;
+                      token = 0 /* Term.Err */;
                   }
                   stack.recoverByDelete(token, tokenEnd);
                   if (verbose)
@@ -10336,8 +11485,8 @@
           super();
           /// @internal
           this.wrappers = [];
-          if (spec.version != 14 /* Version */)
-              throw new RangeError(`Parser version (${spec.version}) doesn't match runtime version (${14 /* Version */})`);
+          if (spec.version != 14 /* File.Version */)
+              throw new RangeError(`Parser version (${spec.version}) doesn't match runtime version (${14 /* File.Version */})`);
           let nodeNames = spec.nodeNames.split(" ");
           this.minRepeatTerm = nodeNames.length;
           for (let i = 0; i < spec.repeatNodeCount; i++)
@@ -10427,16 +11576,16 @@
       hasAction(state, terminal) {
           let data = this.data;
           for (let set = 0; set < 2; set++) {
-              for (let i = this.stateSlot(state, set ? 2 /* Skip */ : 1 /* Actions */), next;; i += 3) {
-                  if ((next = data[i]) == 65535 /* End */) {
-                      if (data[i + 1] == 1 /* Next */)
+              for (let i = this.stateSlot(state, set ? 2 /* ParseState.Skip */ : 1 /* ParseState.Actions */), next;; i += 3) {
+                  if ((next = data[i]) == 65535 /* Seq.End */) {
+                      if (data[i + 1] == 1 /* Seq.Next */)
                           next = data[i = pair(data, i + 2)];
-                      else if (data[i + 1] == 2 /* Other */)
+                      else if (data[i + 1] == 2 /* Seq.Other */)
                           return pair(data, i + 2);
                       else
                           break;
                   }
-                  if (next == terminal || next == 0 /* Err */)
+                  if (next == terminal || next == 0 /* Term.Err */)
                       return pair(data, i + 1);
               }
           }
@@ -10444,39 +11593,43 @@
       }
       /// @internal
       stateSlot(state, slot) {
-          return this.states[(state * 6 /* Size */) + slot];
+          return this.states[(state * 6 /* ParseState.Size */) + slot];
       }
       /// @internal
       stateFlag(state, flag) {
-          return (this.stateSlot(state, 0 /* Flags */) & flag) > 0;
+          return (this.stateSlot(state, 0 /* ParseState.Flags */) & flag) > 0;
       }
       /// @internal
       validAction(state, action) {
-          if (action == this.stateSlot(state, 4 /* DefaultReduce */))
-              return true;
-          for (let i = this.stateSlot(state, 1 /* Actions */);; i += 3) {
-              if (this.data[i] == 65535 /* End */) {
-                  if (this.data[i + 1] == 1 /* Next */)
+          return !!this.allActions(state, a => a == action ? true : null);
+      }
+      /// @internal
+      allActions(state, action) {
+          let deflt = this.stateSlot(state, 4 /* ParseState.DefaultReduce */);
+          let result = deflt ? action(deflt) : undefined;
+          for (let i = this.stateSlot(state, 1 /* ParseState.Actions */); result == null; i += 3) {
+              if (this.data[i] == 65535 /* Seq.End */) {
+                  if (this.data[i + 1] == 1 /* Seq.Next */)
                       i = pair(this.data, i + 2);
                   else
-                      return false;
+                      break;
               }
-              if (action == pair(this.data, i + 1))
-                  return true;
+              result = action(pair(this.data, i + 1));
           }
+          return result;
       }
       /// Get the states that can follow this one through shift actions or
       /// goto jumps. @internal
       nextStates(state) {
           let result = [];
-          for (let i = this.stateSlot(state, 1 /* Actions */);; i += 3) {
-              if (this.data[i] == 65535 /* End */) {
-                  if (this.data[i + 1] == 1 /* Next */)
+          for (let i = this.stateSlot(state, 1 /* ParseState.Actions */);; i += 3) {
+              if (this.data[i] == 65535 /* Seq.End */) {
+                  if (this.data[i + 1] == 1 /* Seq.Next */)
                       i = pair(this.data, i + 2);
                   else
                       break;
               }
-              if ((this.data[i + 2] & (65536 /* ReduceFlag */ >> 16)) == 0) {
+              if ((this.data[i + 2] & (65536 /* Action.ReduceFlag */ >> 16)) == 0) {
                   let value = this.data[i + 1];
                   if (!result.some((v, i) => (i & 1) && v == value))
                       result.push(this.data[i], value);
@@ -10484,11 +11637,6 @@
           }
           return result;
       }
-      /// @internal
-      overrides(token, prev) {
-          let iPrev = findOffset(this.data, this.tokenPrecTable, prev);
-          return iPrev < 0 || findOffset(this.data, this.tokenPrecTable, token) < iPrev;
-      }
       /// Configure the parser. Returns a new parser instance that has the
       /// given settings modified. Settings not provided in `config` are
       /// kept from the original parser.
@@ -10566,30 +11714,24 @@
           let disabled = null;
           for (let i = 0; i < values.length; i++)
               if (!flags[i]) {
-                  for (let j = this.dialects[values[i]], id; (id = this.data[j++]) != 65535 /* End */;)
+                  for (let j = this.dialects[values[i]], id; (id = this.data[j++]) != 65535 /* Seq.End */;)
                       (disabled || (disabled = new Uint8Array(this.maxTerm + 1)))[id] = 1;
               }
           return new Dialect(dialect, flags, disabled);
       }
       /// Used by the output of the parser generator. Not available to
-      /// user code.
+      /// user code. @hide
       static deserialize(spec) {
           return new LRParser(spec);
       }
   }
   function pair(data, off) { return data[off] | (data[off + 1] << 16); }
-  function findOffset(data, start, term) {
-      for (let i = start, next; (next = data[i]) != 65535 /* End */; i++)
-          if (next == term)
-              return i - start;
-      return -1;
-  }
   function findFinished(stacks) {
       let best = null;
       for (let stack of stacks) {
           let stopped = stack.p.stoppedAt;
           if ((stack.pos == stack.p.stream.end || stopped != null && stack.pos > stopped) &&
-              stack.p.parser.stateFlag(stack.state, 2 /* Accepting */) &&
+              stack.p.parser.stateFlag(stack.state, 2 /* StateFlag.Accepting */) &&
               (!best || best.score < stack.score))
               best = stack;
       }
@@ -10597,7 +11739,7 @@
   }
   function getSpecializer(spec) {
       if (spec.external) {
-          let mask = spec.extend ? 1 /* Extend */ : 0 /* Specialize */;
+          let mask = spec.extend ? 1 /* Specialize.Extend */ : 0 /* Specialize.Specialize */;
           return (value, stack) => (spec.external(value, stack) << 1) | mask;
       }
       return spec.get;
@@ -10933,7 +12075,7 @@
               if (rule.mode == 1 /* Inherit */)
                   inheritedClass += (inheritedClass ? " " : "") + tagCls;
           }
-          this.startSpan(cursor.from, cls);
+          this.startSpan(Math.max(from, start), cls);
           if (rule.opaque)
               return;
           let mounted = cursor.tree && cursor.tree.prop(NodeProp.mounted);
@@ -10957,14 +12099,16 @@
                       break;
                   pos = next.to + start;
                   if (pos > from) {
-                      this.highlightRange(inner.cursor(), Math.max(from, next.from + start), Math.min(to, pos), inheritedClass, innerHighlighters);
-                      this.startSpan(pos, cls);
+                      this.highlightRange(inner.cursor(), Math.max(from, next.from + start), Math.min(to, pos), "", innerHighlighters);
+                      this.startSpan(Math.min(to, pos), cls);
                   }
               }
               if (hasChild)
                   cursor.parent();
           }
           else if (cursor.firstChild()) {
+              if (mounted)
+                  inheritedClass = "";
               do {
                   if (cursor.to <= from)
                       continue;
@@ -11458,68 +12602,78 @@
   ]);
 
   // This file was generated by lezer-generator. You probably shouldn't edit it.
-  const propertyIdentifier$1 = 147,
-    identifier$1 = 148,
-    nameIdentifier$1 = 149,
-    insertSemi$1 = 150,
-    expression0$1 = 154,
-    ForExpression$1 = 4,
-    forExpressionStart$1 = 157,
-    ForInExpression$1 = 7,
-    Name$1 = 8,
-    Identifier$1 = 9,
-    AdditionalIdentifier$1 = 10,
-    forExpressionBodyStart$1 = 165,
-    IfExpression$1 = 18,
-    ifExpressionStart$1 = 166,
-    QuantifiedExpression$1 = 22,
-    quantifiedExpressionStart$1 = 167,
-    QuantifiedInExpression$1 = 26,
-    PositiveUnaryTest$1 = 36,
-    ArithmeticExpression$1 = 40,
-    arithmeticPlusStart$1 = 171,
-    arithmeticTimesStart$1 = 172,
-    arithmeticExpStart$1 = 173,
-    arithmeticUnaryStart$1 = 174,
-    VariableName$1 = 47,
-    PathExpression$1 = 67,
-    pathExpressionStart$1 = 179,
-    FilterExpression$1 = 69,
-    filterExpressionStart$1 = 180,
-    FunctionInvocation$1 = 71,
-    functionInvocationStart$1 = 181,
-    ParameterName$1 = 103,
-    nil$1 = 186,
-    NumericLiteral$1 = 106,
-    StringLiteral$1 = 107,
-    BooleanLiteral$1 = 108,
-    FunctionDefinition$1 = 117,
-    functionDefinitionStart$1 = 194,
-    Context$1 = 124,
-    contextStart$1 = 196,
-    ContextEntry$1 = 125,
-    PropertyName$1 = 127,
-    PropertyIdentifier$1 = 128;
-
-  const LOG_PARSE$1 = typeof process != 'undefined' && process.env && /\bfparse(:dbg)?\b/.test(process.env.LOG);
-  const LOG_PARSE_DEBUG$1 = typeof process != 'undefined' && process.env && /\fparse:dbg\b/.test(process.env.LOG);
-  const LOG_VARS$1 = typeof process != 'undefined' && process.env && /\bcontext?\b/.test(process.env.LOG);
-
-  const spaceChars$1 = [
+  const propertyIdentifier = 120,
+    identifier = 121,
+    nameIdentifier = 122,
+    insertSemi = 123,
+    expression0 = 127,
+    ForExpression = 4,
+    forExpressionStart = 130,
+    ForInExpression = 7,
+    Name = 8,
+    Identifier = 9,
+    AdditionalIdentifier = 10,
+    forExpressionBodyStart = 138,
+    IfExpression = 19,
+    ifExpressionStart = 139,
+    QuantifiedExpression = 23,
+    quantifiedExpressionStart = 140,
+    QuantifiedInExpression = 27,
+    PositiveUnaryTest = 37,
+    ArithmeticExpression = 41,
+    arithmeticPlusStart = 144,
+    arithmeticTimesStart = 145,
+    arithmeticExpStart = 146,
+    arithmeticUnaryStart = 147,
+    VariableName = 47,
+    PathExpression = 67,
+    pathExpressionStart = 152,
+    FilterExpression = 69,
+    filterExpressionStart = 153,
+    FunctionInvocation = 71,
+    functionInvocationStart = 154,
+    ParameterName = 75,
+    nil = 159,
+    NumericLiteral = 78,
+    StringLiteral = 79,
+    BooleanLiteral = 80,
+    List = 88,
+    listStart = 170,
+    FunctionDefinition = 89,
+    functionDefinitionStart = 172,
+    Context = 96,
+    contextStart = 174,
+    ContextEntry = 97,
+    PropertyName = 99,
+    PropertyIdentifier = 100;
+
+  /* global console,process */
+
+  const LOG_PARSE = typeof process != 'undefined' && process.env && /\bfparse(:dbg)?\b/.test(process.env.LOG);
+  const LOG_PARSE_DEBUG = typeof process != 'undefined' && process.env && /\bfparse:dbg\b/.test(process.env.LOG);
+  const LOG_VARS = typeof process != 'undefined' && process.env && /\bcontext\b/.test(process.env.LOG);
+
+  const spaceChars = [
     9, 11, 12, 32, 133, 160,
     5760, 8192, 8193, 8194, 8195, 8196, 8197, 8198,
     8199, 8200, 8201, 8202, 8232, 8233, 8239, 8287, 12288
   ];
 
-  const newlineChars$1 = chars$3('\n\r');
+  const newlineChars = chars$1('\n\r');
+
+  const asterix = '*'.charCodeAt(0);
 
-  const additionalNameChars$1 = chars$3("'./-+*");
+  const additionalNameChars = chars$1("'./-+*^");
+
+  /**
+   * @typedef { VariableContext | any } ContextValue
+   */
 
   /**
    * @param { string } str
    * @return { number[] }
    */
-  function chars$3(str) {
+  function chars$1(str) {
     return Array.from(str).map(s => s.charCodeAt(0));
   }
 
@@ -11527,7 +12681,7 @@
    * @param { number } ch
    * @return { boolean }
    */
-  function isStartChar$1(ch) {
+  function isStartChar(ch) {
     return (
       ch === 63 // ?
     ) || (
@@ -11537,7 +12691,7 @@
     ) || (
       ch >= 97 && ch <= 122 // a-z
     ) || (
-      ch >= 161 && !isPartChar$1(ch) && !isSpace$1(ch)
+      ch >= 161 && !isPartChar(ch) && !isSpace(ch)
     );
   }
 
@@ -11545,15 +12699,15 @@
    * @param { number } ch
    * @return { boolean }
    */
-  function isAdditional$1(ch) {
-    return additionalNameChars$1.includes(ch);
+  function isAdditional(ch) {
+    return additionalNameChars.includes(ch);
   }
 
   /**
    * @param { number } ch
    * @return { boolean }
    */
-  function isPartChar$1(ch) {
+  function isPartChar(ch) {
     return (
       ch >= 48 && ch <= 57 // 0-9
     ) || (
@@ -11569,12 +12723,12 @@
    * @param { number } ch
    * @return { boolean }
    */
-  function isSpace$1(ch) {
-    return spaceChars$1.includes(ch);
+  function isSpace(ch) {
+    return spaceChars.includes(ch);
   }
 
   // eslint-disable-next-line
-  function indent$1(str, spaces) {
+  function indent(str, spaces) {
     return spaces.concat(
       str.split(/\n/g).join('\n' + spaces)
     );
@@ -11583,15 +12737,22 @@
   /**
    * @param { import('@lezer/lr').InputStream } input
    * @param  { number } [offset]
-   * @param { boolean } [includeOperators]
    *
    * @return { { token: string, offset: number } | null }
    */
-  function parseAdditionalSymbol$1(input, offset = 0) {
+  function parseAdditionalSymbol(input, offset = 0) {
 
     const next = input.peek(offset);
 
-    if (isAdditional$1(next)) {
+    if (next === asterix && input.peek(offset + 1) === asterix) {
+
+      return {
+        offset: 2,
+        token: '**'
+      };
+    }
+
+    if (isAdditional(next)) {
       return {
         offset: 1,
         token: String.fromCharCode(next)
@@ -11608,11 +12769,11 @@
    *
    * @return { { token: string, offset: number } | null }
    */
-  function parseIdentifier$1(input, offset = 0, namePart = false) {
+  function parseIdentifier(input, offset = 0, namePart = false) {
     for (let inside = false, chars = [], i = 0;; i++) {
       const next = input.peek(offset + i);
 
-      if (isStartChar$1(next) || ((inside || namePart) && isPartChar$1(next))) {
+      if (isStartChar(next) || ((inside || namePart) && isPartChar(next))) {
         if (!inside) {
           inside = true;
         }
@@ -11638,12 +12799,12 @@
    *
    * @return { { token: string, offset: number } | null }
    */
-  function parseSpaces$1(input, offset) {
+  function parseSpaces(input, offset) {
 
     for (let inside = false, i = 0;; i++) {
       let next = input.peek(offset + i);
 
-      if (isSpace$1(next)) {
+      if (isSpace(next)) {
         if (!inside) {
           inside = true;
         }
@@ -11668,7 +12829,7 @@
    *
    * @return { { token: string, offset: number, term: number } | null }
    */
-  function parseName$1(input, variables) {
+  function parseName(input, variables) {
     const contextKeys = variables.contextKeys();
 
     const start = variables.tokens;
@@ -11679,9 +12840,9 @@
       const maybeSpace = tokens.length > 0;
 
       const match = (
-        parseIdentifier$1(input, i, namePart) ||
-        namePart && parseAdditionalSymbol$1(input, i) ||
-        maybeSpace && parseSpaces$1(input, i)
+        parseIdentifier(input, i, namePart) ||
+        namePart && parseAdditionalSymbol(input, i) ||
+        maybeSpace && parseSpaces(input, i)
       );
 
       // match is required
@@ -11710,11 +12871,11 @@
         nextMatch = {
           token,
           offset: token.length,
-          term: nameIdentifier$1
+          term: nameIdentifier
         };
       }
 
-      if (dateTimeIdentifiers$1.some(el => el === name)) {
+      if (dateTimeIdentifiers.some(el => el === name)) {
         const token = tokens[0];
 
         // parse date time identifiers as normal
@@ -11724,13 +12885,13 @@
         nextMatch = {
           token,
           offset: token.length,
-          term: identifier$1
+          term: identifier
         };
       }
 
       if (
         !contextKeys.some(el => el.startsWith(name)) &&
-        !dateTimeIdentifiers$1.some(el => el.startsWith(name))
+        !dateTimeIdentifiers.some(el => el.startsWith(name))
       ) {
         return nextMatch;
       }
@@ -11738,50 +12899,50 @@
 
   }
 
-  const identifiersMap$1 = {
-    [ identifier$1 ]: 'identifier',
-    [ nameIdentifier$1 ]: 'nameIdentifier'
+  const identifiersMap = {
+    [ identifier ]: 'identifier',
+    [ nameIdentifier ]: 'nameIdentifier'
   };
 
-  const identifiers$1 = new ExternalTokenizer((input, stack) => {
+  const identifiers = new ExternalTokenizer((input, stack) => {
 
-    LOG_PARSE_DEBUG$1 && console.log('%s: T <identifier | nameIdentifier>', input.pos);
+    LOG_PARSE_DEBUG && console.log('%s: T <identifier | nameIdentifier>', input.pos);
 
-    const nameMatch = parseName$1(input, stack.context);
+    const nameMatch = parseName(input, stack.context);
 
     const start = stack.context.tokens;
 
-    const match = nameMatch || parseIdentifier$1(input, 0, start.length > 0);
+    const match = nameMatch || parseIdentifier(input, 0, start.length > 0);
 
     if (match) {
       input.advance(match.offset);
-      input.acceptToken(nameMatch ? nameMatch.term : identifier$1);
+      input.acceptToken(nameMatch ? nameMatch.term : identifier);
 
-      LOG_PARSE$1 && console.log('%s: MATCH <%s> <%s>', input.pos, nameMatch ? identifiersMap$1[nameMatch.term] : 'identifier', match.token);
+      LOG_PARSE && console.log('%s: MATCH <%s> <%s>', input.pos, nameMatch ? identifiersMap[nameMatch.term] : 'identifier', match.token);
     }
   }, { contextual: true });
 
 
-  const propertyIdentifiers$1 = new ExternalTokenizer((input, stack) => {
+  const propertyIdentifiers = new ExternalTokenizer((input, stack) => {
 
-    LOG_PARSE_DEBUG$1 && console.log('%s: T <propertyIdentifier>', input.pos);
+    LOG_PARSE_DEBUG && console.log('%s: T <propertyIdentifier>', input.pos);
 
     const start = stack.context.tokens;
 
-    const match = parseIdentifier$1(input, 0, start.length > 0);
+    const match = parseIdentifier(input, 0, start.length > 0);
 
     if (match) {
       input.advance(match.offset);
-      input.acceptToken(propertyIdentifier$1);
+      input.acceptToken(propertyIdentifier);
 
-      LOG_PARSE$1 && console.log('%s: MATCH <propertyIdentifier> <%s>', input.pos, match.token);
+      LOG_PARSE && console.log('%s: MATCH <propertyIdentifier> <%s>', input.pos, match.token);
     }
   });
 
 
-  const insertSemicolon$1 = new ExternalTokenizer((input, stack) => {
+  const insertSemicolon = new ExternalTokenizer((input, stack) => {
 
-    LOG_PARSE_DEBUG$1 && console.log('%s: T <insertSemi>', input.pos);
+    LOG_PARSE_DEBUG && console.log('%s: T <insertSemi>', input.pos);
 
     let offset;
     let insert = false;
@@ -11789,11 +12950,11 @@
     for (offset = 0;; offset++) {
       const char = input.peek(offset);
 
-      if (spaceChars$1.includes(char)) {
+      if (spaceChars.includes(char)) {
         continue;
       }
 
-      if (newlineChars$1.includes(char)) {
+      if (newlineChars.includes(char)) {
         insert = true;
       }
 
@@ -11802,45 +12963,47 @@
 
     if (insert) {
 
-      const identifier = parseIdentifier$1(input, offset + 1);
-      const spaces = parseSpaces$1(input, offset + 1);
+      const identifier = parseIdentifier(input, offset + 1);
+      const spaces = parseSpaces(input, offset + 1);
 
       if (spaces || identifier && /^(then|else|return|satisfies)$/.test(identifier.token)) {
         return;
       }
 
-      LOG_PARSE$1 && console.log('%s: MATCH <insertSemi>', input.pos);
-      input.acceptToken(insertSemi$1);
+      LOG_PARSE && console.log('%s: MATCH <insertSemi>', input.pos);
+      input.acceptToken(insertSemi);
     }
   });
 
-  const prefixedContextStarts$1 = {
-    [ functionInvocationStart$1 ]: 'FunctionInvocation',
-    [ filterExpressionStart$1 ]: 'FilterExpression',
-    [ pathExpressionStart$1 ]: 'PathExpression'
+  const prefixedContextStarts = {
+    [ functionInvocationStart ]: 'FunctionInvocation',
+    [ filterExpressionStart ]: 'FilterExpression',
+    [ pathExpressionStart ]: 'PathExpression'
   };
 
-  const contextStarts$1 = {
-    [ contextStart$1 ]: 'Context',
-    [ functionDefinitionStart$1 ]: 'FunctionDefinition',
-    [ forExpressionStart$1 ]: 'ForExpression',
-    [ ifExpressionStart$1 ]: 'IfExpression',
-    [ quantifiedExpressionStart$1 ]: 'QuantifiedExpression'
+  const contextStarts = {
+    [ contextStart ]: 'Context',
+    [ functionDefinitionStart ]: 'FunctionDefinition',
+    [ forExpressionStart ]: 'ForExpression',
+    [ listStart ]: 'List',
+    [ ifExpressionStart ]: 'IfExpression',
+    [ quantifiedExpressionStart ]: 'QuantifiedExpression'
   };
 
-  const contextEnds$1 = {
-    [ Context$1 ]: 'Context',
-    [ FunctionDefinition$1 ]: 'FunctionDefinition',
-    [ ForExpression$1 ]: 'ForExpression',
-    [ IfExpression$1 ]: 'IfExpression',
-    [ QuantifiedExpression$1 ]: 'QuantifiedExpression',
-    [ PathExpression$1 ]: 'PathExpression',
-    [ FunctionInvocation$1 ]: 'FunctionInvocation',
-    [ FilterExpression$1 ]: 'FilterExpression',
-    [ ArithmeticExpression$1 ]: 'ArithmeticExpression'
+  const contextEnds = {
+    [ Context ]: 'Context',
+    [ FunctionDefinition ]: 'FunctionDefinition',
+    [ ForExpression ]: 'ForExpression',
+    [ List ]: 'List',
+    [ IfExpression ]: 'IfExpression',
+    [ QuantifiedExpression ]: 'QuantifiedExpression',
+    [ PathExpression ]: 'PathExpression',
+    [ FunctionInvocation ]: 'FunctionInvocation',
+    [ FilterExpression ]: 'FilterExpression',
+    [ ArithmeticExpression ]: 'ArithmeticExpression'
   };
 
-  let ValueProducer$1 = class ValueProducer {
+  class ValueProducer {
 
     /**
      * @param { Function } fn
@@ -11862,25 +13025,131 @@
       return new ValueProducer(fn);
     }
 
-  };
+  }
 
-  const dateTimeLiterals$1 = {
+  const dateTimeLiterals = {
     'date and time': 1,
     'date': 1,
     'time': 1,
     'duration': 1
   };
 
-  const dateTimeIdentifiers$1 = Object.keys(dateTimeLiterals$1);
+  const dateTimeIdentifiers = Object.keys(dateTimeLiterals);
+
+
+  /**
+   * A basic key-value store to hold context values.
+   */
+  class VariableContext {
+
+    /**
+     * Creates a new context from a JavaScript object.
+     *
+     * @param {any} value
+     */
+    constructor(value = {}) {
+
+      /**
+       * @protected
+       */
+      this.value = value;
+    }
+
+    /**
+     * Return all defined keys of the context.
+     *
+     * @returns {Array<string>} the keys of the context
+     */
+    getKeys() {
+      return Object.keys(this.value);
+    }
+
+    /**
+     * Returns the value of the given key.
+     *
+     * If the value represents a context itself, it should be wrapped in a
+     * context class.
+     *
+     * @param {String} key
+     * @returns {VariableContext|ValueProducer|null}
+     */
+    get(key) {
+      const result = this.value[key];
+
+      if (this.constructor.isAtomic(result)) {
+        return result;
+      }
+
+      return this.constructor.of(result);
+    }
+
+    /**
+     * Creates a new context with the given key added.
+     *
+     * @param {String} key
+     * @param {any} value
+     * @returns {VariableContext} new context with the given key added
+     */
+    set(key, value) {
+      return this.constructor.of({
+        ...this.value,
+        [key]: value
+      });
+    }
+
+    /**
+     * Wether the given value is atomic. Non-atomic values need to be wrapped in a
+     * context Class.
+     *
+     * @param {any} value
+     * @returns {Boolean}
+     */
+    static isAtomic(value) {
+      return !value ||
+            value instanceof this ||
+            value instanceof ValueProducer ||
+            typeof value !== 'object';
+    }
+
+    /**
+     * Takes any number of Contexts and merges them into a single Context.
+     *
+     * @param  {...Context} contexts
+     * @returns {VariableContext}
+     */
+    static of(...contexts) {
+      const unwrap = (context) => {
+        if (!context || typeof context !== 'object') {
+          return {};
+        }
+
+        if (context instanceof this) {
+          return context.value;
+        }
 
-  let Variables$1 = class Variables {
+        return { ...context };
+      };
+
+      const merged = contexts.reduce((merged, context) => {
+        return {
+          ...merged,
+          ...unwrap(context)
+        };
+      }, {});
+
+      return new this(merged);
+    }
+
+  }
+
+  class Variables {
 
     constructor({
       name = 'Expressions',
       tokens = [],
       children = [],
       parent = null,
-      context = { },
+      context,
       value,
       raw
     } = {}) {
@@ -11900,7 +13169,7 @@
         parent: this
       });
 
-      LOG_VARS$1 && console.log('[%s] enter', childScope.path, childScope.context);
+      LOG_VARS && console.log('[%s] enter', childScope.path, childScope.context);
 
       return childScope;
     }
@@ -11908,19 +13177,19 @@
     exitScope(str) {
 
       if (!this.parent) {
-        LOG_VARS$1 && console.log('[%s] NO exit %o\n%s', this.path, this.context, indent$1(str, '  '));
+        LOG_VARS && console.log('[%s] NO exit %o\n%s', this.path, this.context, indent(str, '  '));
 
         return this;
       }
 
-      LOG_VARS$1 && console.log('[%s] exit %o\n%s', this.path, this.context, indent$1(str, '  '));
+      LOG_VARS && console.log('[%s] exit %o\n%s', this.path, this.context, indent(str, '  '));
 
       return this.parent.pushChild(this);
     }
 
     token(part) {
 
-      LOG_VARS$1 && console.log('[%s] token <%s> + <%s>', this.path, this.tokens.join(' '), part);
+      LOG_VARS && console.log('[%s] token <%s> + <%s>', this.path, this.tokens.join(' '), part);
 
       return this.assign({
         tokens: [ ...this.tokens, part ]
@@ -11929,7 +13198,7 @@
 
     literal(value) {
 
-      LOG_VARS$1 && console.log('[%s] literal %o', this.path, value);
+      LOG_VARS && console.log('[%s] literal %o', this.path, value);
 
       return this.pushChild(this.of({
         name: 'Literal',
@@ -11943,7 +13212,7 @@
      * @return {any}
      */
     computedValue() {
-      for (let scope = this;;scope = scope.children.slice(-1)[0]) {
+      for (let scope = this;;scope = last(scope.children)) {
 
         if (!scope) {
           return null;
@@ -11956,7 +13225,7 @@
     }
 
     contextKeys() {
-      return Object.keys(this.context).map(normalizeContextKey$1);
+      return this.context.getKeys().map(normalizeContextKey);
     }
 
     get path() {
@@ -11971,19 +13240,19 @@
      */
     get(variable) {
 
-      const names = [ variable, variable && normalizeContextKey$1(variable) ];
+      const names = [ variable, variable && normalizeContextKey(variable) ];
 
-      const contextKey = Object.keys(this.context).find(
-        key => names.includes(normalizeContextKey$1(key))
+      const contextKey = this.context.getKeys().find(
+        key => names.includes(normalizeContextKey(key))
       );
 
       if (typeof contextKey === 'undefined') {
         return undefined;
       }
 
-      const val = this.context[contextKey];
+      const val = this.context.get(contextKey);
 
-      if (val instanceof ValueProducer$1) {
+      if (val instanceof ValueProducer) {
         return val.get(this);
       } else {
         return val;
@@ -12006,7 +13275,7 @@
         raw: variable
       });
 
-      LOG_VARS$1 && console.log('[%s] resolve name <%s=%s>', variableScope.path, variable, this.get(variable));
+      LOG_VARS && console.log('[%s] resolve name <%s=%s>', variableScope.path, variable, this.get(variable));
 
       return parentScope.pushChild(variableScope);
     }
@@ -12045,7 +13314,7 @@
 
       const variableName = this.tokens.join(' ');
 
-      LOG_VARS$1 && console.log('[%s] declareName <%s>', this.path, variableName);
+      LOG_VARS && console.log('[%s] declareName <%s>', this.path, variableName);
 
       return this.assign({
         tokens: []
@@ -12060,17 +13329,14 @@
     define(name, value) {
 
       if (typeof name !== 'string') {
-        LOG_VARS$1 && console.log('[%s] no define <%s=%s>', this.path, name, value);
+        LOG_VARS && console.log('[%s] no define <%s=%s>', this.path, name, value);
 
         return this;
       }
 
-      LOG_VARS$1 && console.log('[%s] define <%s=%s>', this.path, name, value);
+      LOG_VARS && console.log('[%s] define <%s=%s>', this.path, name, value);
 
-      const context = {
-        ...this.context,
-        [name]: value
-      };
+      const context = this.context.set(name, value);
 
       return this.assign({
         context
@@ -12109,38 +13375,41 @@
     }
 
     static of(options) {
+
       const {
         name,
         tokens = [],
         children = [],
         parent = null,
-        context = {},
+        context,
         value,
         raw
       } = options;
 
+      if (!context) {
+        throw new Error('must provide <context>');
+      }
+
       return new Variables({
         name,
         tokens: [ ...tokens ],
         children: [ ...children ],
-        context: {
-          ...context
-        },
+        context,
         parent,
         value,
         raw
       });
     }
 
-  };
+  }
 
   /**
    * @param { string } name
    *
    * @return { string } normalizedName
    */
-  function normalizeContextKey$1(name) {
-    return name.replace(/\s*([./\-'+*])\s*/g, ' $1 ').replace(/\s{2,}/g, ' ').trim();
+  function normalizeContextKey(name) {
+    return name.replace(/\s*([./\-'+]|\*\*?)\s*/g, ' $1 ').replace(/\s{2,}/g, ' ').trim();
   }
 
   /**
@@ -12151,7 +13420,7 @@
    * @param { string } code
    * @return { Variables }
    */
-  function wrap$1(variables, scopeName, code) {
+  function wrap(variables, scopeName, code) {
 
     const parts = variables.children.filter(c => c.name !== scopeName);
     const children = variables.children.filter(c => c.name === scopeName);
@@ -12173,38 +13442,43 @@
   }
 
   /**
-   * @param { any } context
+   * @param { ContextValue } [context]
+   * @param { typeof VariableContext } [Context]
    *
    * @return { ContextTracker<Variables> }
    */
-  function trackVariables$1(context = {}) {
+  function trackVariables(context = {}, Context = VariableContext) {
 
-    const start = Variables$1.of({
-      context
+    const start = Variables.of({
+      context: Context.of(context)
     });
 
     return new ContextTracker({
       start,
       reduce(variables, term, stack, input) {
 
-        if (term === Context$1) {
+        if (term === IfExpression) {
+          const [ thenPart, elsePart ] = variables.children.slice(-2);
+
           variables = variables.assign({
-            value: variables.context
+            value: Context.of(
+              thenPart?.computedValue(),
+              elsePart?.computedValue()
+            )
           });
         }
 
-        if (term === IfExpression$1) {
-          const [ thenPart, elsePart ] = variables.children.slice(-2);
-
+        if (term === List) {
           variables = variables.assign({
-            value: {
-              ...thenPart?.computedValue(),
-              ...elsePart?.computedValue()
-            }
+            value: Context.of(
+              ...variables.children.map(
+                c => c?.computedValue()
+              )
+            )
           });
         }
 
-        if (term === FilterExpression$1) {
+        if (term === FilterExpression) {
           const [ sourcePart, _ ] = variables.children.slice(-2);
 
           variables = variables.assign({
@@ -12212,7 +13486,7 @@
           });
         }
 
-        if (term === FunctionInvocation$1) {
+        if (term === FunctionInvocation) {
 
           const [
             name,
@@ -12221,70 +13495,94 @@
 
           // preserve type information through `get value(context, key)` utility
           if (name?.raw === 'get value') {
-            variables = getContextValue$1(variables, args);
+            variables = getContextValue(variables, args);
           }
         }
 
-        const start = contextStarts$1[term];
+        const start = contextStarts[term];
 
         if (start) {
           return variables.enterScope(start);
         }
 
-        const prefixedStart = prefixedContextStarts$1[term];
+        const prefixedStart = prefixedContextStarts[term];
 
         // pull <expression> into new <prefixedStart> context
         if (prefixedStart) {
 
-          const children = variables.children.slice(0, -1);
-          const lastChild = variables.children.slice(-1)[0];
+          const {
+            children: currentChildren,
+            context: currentContext,
+          } = variables;
 
-          return variables.assign({
-            children
-          }).enterScope(prefixedStart).pushChild(lastChild).assign({
-            context: {
-              ...variables.context,
-              ...lastChild?.computedValue()
-            }
-          });
+          const children = currentChildren.slice(0, -1);
+          const lastChild = last(currentChildren);
+
+          let newContext = null;
+
+          if (term === pathExpressionStart) {
+            newContext = Context.of(lastChild?.computedValue());
+          }
+
+          if (term === filterExpressionStart) {
+            newContext = Context.of(
+              currentContext,
+              lastChild?.computedValue()
+            ).set('item', lastChild?.computedValue());
+          }
+
+          return variables
+            .assign({ children })
+            .enterScope(prefixedStart)
+            .pushChild(lastChild)
+            .assign({ context: newContext || currentContext });
         }
 
         const code = input.read(input.pos, stack.pos);
 
-        const end = contextEnds$1[term];
+        const end = contextEnds[term];
 
         if (end) {
           return variables.exitScope(code);
         }
 
-        if (term === ContextEntry$1) {
-          return wrap$1(variables, 'ContextEntry', code);
+        if (term === ContextEntry) {
+          const parts = variables.children.filter(c => c.name !== 'ContextEntry');
+
+          const name = parts[0];
+          const value = last(parts);
+
+          return wrap(variables, 'ContextEntry', code).assign(
+            {
+              value: Context
+                .of(variables.value)
+                .set(name.computedValue(), value?.computedValue())
+            }
+          );
         }
 
         if (
-          term === ForInExpression$1 ||
-          term === QuantifiedInExpression$1
+          term === ForInExpression ||
+          term === QuantifiedInExpression
         ) {
-          return wrap$1(variables, 'InExpression', code);
+          return wrap(variables, 'InExpression', code);
         }
 
         // define <partial> within ForExpression body
-        if (term === forExpressionBodyStart$1) {
+        if (term === forExpressionBodyStart) {
 
           return variables.define(
             'partial',
-            ValueProducer$1.of(variables => {
-              return variables.children[variables.children.length - 1]?.computedValue();
+            ValueProducer.of(variables => {
+              return last(variables.children)?.computedValue();
             })
           );
         }
 
         if (
-          term === ParameterName$1
+          term === ParameterName
         ) {
-          const [ left ] = variables.children.slice(-1);
-
-          const name = left.computedValue();
+          const name = last(variables.children).computedValue();
 
           // TODO: attach type information
           return variables.define(name, 1);
@@ -12292,71 +13590,71 @@
 
         // pull <expression> into ArithmeticExpression child
         if (
-          term === arithmeticPlusStart$1 ||
-          term === arithmeticTimesStart$1 ||
-          term === arithmeticExpStart$1
+          term === arithmeticPlusStart ||
+          term === arithmeticTimesStart ||
+          term === arithmeticExpStart
         ) {
           const children = variables.children.slice(0, -1);
-          const lastChild = variables.children.slice(-1)[0];
+          const lastChild = last(variables.children);
 
           return variables.assign({
             children
           }).enterScope('ArithmeticExpression').pushChild(lastChild);
         }
 
-        if (term === arithmeticUnaryStart$1) {
+        if (term === arithmeticUnaryStart) {
           return variables.enterScope('ArithmeticExpression');
         }
 
         if (
-          term === Identifier$1 ||
-          term === AdditionalIdentifier$1 ||
-          term === PropertyIdentifier$1
+          term === Identifier ||
+          term === AdditionalIdentifier ||
+          term === PropertyIdentifier
         ) {
           return variables.token(code);
         }
 
         if (
-          term === StringLiteral$1
+          term === StringLiteral
         ) {
           return variables.literal(code.replace(/^"|"$/g, ''));
         }
 
-        if (term === BooleanLiteral$1) {
+        if (term === BooleanLiteral) {
           return variables.literal(code === 'true' ? true : false);
         }
 
-        if (term === NumericLiteral$1) {
+        if (term === NumericLiteral) {
           return variables.literal(parseFloat(code));
         }
 
-        if (term === nil$1) {
+        if (term === nil) {
           return variables.literal(null);
         }
 
         if (
-          term === VariableName$1
+          term === VariableName
         ) {
           return variables.resolveName();
         }
 
         if (
-          term === Name$1 ||
-          term === PropertyName$1
+          term === Name ||
+          term === PropertyName
         ) {
           return variables.declareName();
         }
 
         if (
-          term === expression0$1 ||
-          term === PositiveUnaryTest$1
+          term === expression0 ||
+          term === PositiveUnaryTest
         ) {
           if (variables.tokens.length > 0) {
             throw new Error('uncleared name');
           }
         }
 
-        if (term === expression0$1) {
+        if (term === expression0) {
 
           let parent = variables;
 
@@ -12372,12 +13670,12 @@
     });
   }
 
-  const variableTracker$1 = trackVariables$1({});
+  const variableTracker = trackVariables({});
 
 
   // helpers //////////////
 
-  function getContextValue$1(variables, args) {
+  function getContextValue(variables, args) {
 
     if (!args.length) {
       return variables.assign({
@@ -12386,7 +13684,7 @@
     }
 
     if (args[0].name === 'Name') {
-      args = extractNamedArgs$1(args, [ 'm', 'key' ]);
+      args = extractNamedArgs(args, [ 'm', 'key' ]);
     }
 
     if (args.length !== 2) {
@@ -12412,17 +13710,13 @@
     }
 
     return variables.assign({
-      value: [ normalizeContextKey$1(keyValue), keyValue ].reduce((value, keyValue) => {
-        if (keyValue in contextValue) {
-          return contextValue[keyValue];
-        }
-
-        return value;
+      value: [ normalizeContextKey(keyValue), keyValue ].reduce((value, keyValue) => {
+        return contextValue.get(keyValue) || value;
       }, null)
     });
   }
 
-  function extractNamedArgs$1(args, argNames) {
+  function extractNamedArgs(args, argNames) {
 
     const context = {};
 
@@ -12435,181 +13729,106 @@
     return argNames.map(name => context[name]);
   }
 
-  const feelHighlighting$1 = styleTags({
-    'StringLiteral': tags.string,
-    'NumericLiteral': tags.number,
-    'BooleanLiteral': tags.bool,
-    'Name QualifiedName': tags.name,
-    'CompareOp': tags.compareOperator,
-    'ArithOp': tags.arithmeticOperator,
-    'PropertyName PathExpression/Name Key': tags.propertyName,
-    'for if then else some every satisfies between': tags.controlKeyword,
-    'in return instance of and or': tags.operatorKeyword,
-    'function': tags.definitionKeyword,
-    'FormalParameter/Type!': tags.typeName,
-    'as': tags.keyword,
-    'Wildcard': tags.special,
-    'null': tags.null,
-    ',': tags.separator,
+  function last(arr) {
+    return arr[arr.length - 1];
+  }
+
+  const feelHighlighting = styleTags({
+    StringLiteral: tags.string,
+    NumericLiteral: tags.number,
+    BooleanLiteral: tags.bool,
+    'AtLiteral!': tags.special(tags.string),
+    CompareOp: tags.compareOperator,
+    ArithOp: tags.arithmeticOperator,
+    'for if then else some every satisfies between return': tags.controlKeyword,
+    'in instance of and or': tags.operatorKeyword,
+    function: tags.definitionKeyword,
+    as: tags.keyword,
+    'Type/...': tags.typeName,
+    Wildcard: tags.special,
+    null: tags.null,
+    LineComment: tags.lineComment,
+    BlockComment: tags.blockComment,
+    'VariableName! "?"': tags.variableName,
+    'DateTimeConstructor! SpecialFunctionName!': tags.function(tags.special(tags.variableName)),
+    'List Interval': tags.list,
+    Context: tags.definition(tags.literal),
+    'Name!': tags.definition(tags.variableName),
+    'Key/Name! ContextEntryType/Name!': tags.definition(tags.propertyName),
+    'PathExpression/VariableName!': tags.function(tags.propertyName),
+    'FormalParameter/ParameterName!': tags.function(tags.definition(tags.variableName)),
+    '( )': tags.paren,
     '[ ]': tags.squareBracket,
     '{ }': tags.brace,
-    '( )': tags.paren,
-    'LineComment': tags.lineComment,
-    'BlockComment': tags.blockComment,
-    'ParameterName VariableName ?': tags.variableName,
-    'DateTimeConstructor! SpecialFunctionName BuiltInFunctionName': tags.function(tags.special(tags.variableName)),
-    'FunctionInvocation/VariableName': tags.function(tags.variableName),
-    'List Interval': tags.list,
-    'BuiltInType ListType ContextType FunctionType': tags.function(tags.typeName),
-    'Context': tags.definition(tags.literal),
-    'ContextEntry/Key': tags.variableName,
-    'InExpression/Name': tags.local(tags.variableName),
-    'ParameterName/Name': tags.local(tags.variableName),
-    'IterationContext/".." Interval/".." "."': tags.punctuation
+    '.': tags.derefOperator,
+    ', ;': tags.separator,
+    '..': tags.punctuation
   });
 
   // This file was generated by lezer-generator. You probably shouldn't edit it.
-  const spec_identifier$1 = {__proto__:null,for:10, in:30, return:34, if:38, then:40, else:42, some:46, every:48, satisfies:55, or:58, and:62, between:70, instance:86, of:89, days:99, time:101, duration:103, years:105, months:107, date:109, list:115, context:121, function:128, string:147, length:149, upper:151, case:153, lower:155, substring:157, before:159, after:161, starts:163, with:165, ends:167, contains:169, insert:171, index:173, distinct:175, values:177, met:179, by:181, overlaps:183, finished:185, started:187, day:189, year:191, week:193, month:195, get:197, value:199, entries:201, null:210, true:380, false:380, "?":224, external:240, not:263};
-  const parser$2 = LRParser.deserialize({
+  const spec_identifier = {__proto__:null,for:10, in:32, return:36, if:40, then:42, else:44, some:48, every:50, satisfies:57, or:60, and:64, between:72, instance:86, of:89, days:99, time:101, duration:103, years:105, months:107, date:109, list:115, context:121, function:128, null:154, true:326, false:326, "?":168, external:184, not:209};
+  const parser$1 = LRParser.deserialize({
     version: 14,
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+    context: variableTracker,
     nodeProps: [
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-      ["closedBy", 37,")",70,"]",123,"}"],
-      ["openedBy", 39,"(",68,"[",122,"{"]
+      ["closedBy", 38,")",70,"]",95,"}"],
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+      ["group", -5,77,78,79,80,81,"Literal"]
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-    propSources: [feelHighlighting$1],
+    propSources: [feelHighlighting],
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-    specialized: [{term: 148, get: value => spec_identifier$1[value] || -1}],
-    tokenPrec: 0
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   });
 
-  function parseParameterNames$1(fn) {
-      if (Array.isArray(fn.$args)) {
-          return fn.$args;
-      }
-      const code = fn.toString();
-      const match = /^(?:[^(]*\s*)?\(([^)]+)?\)/.exec(code);
-      if (!match) {
-          throw new Error('failed to parse params: ' + code);
-      }
-      const [_, params] = match;
-      if (!params) {
-          return [];
-      }
-      return params.split(',').map(p => p.trim());
-  }
-  function notImplemented$1(thing) {
-      return new Error(`not implemented: ${thing}`);
-  }
-  /**
-   * @param {string} name
-   * @param {Record<string, any>} context
-   *
-   * @return {any}
-   */
-  function getFromContext$1(name, context) {
-      if (['nil', 'boolean', 'number', 'string'].includes(getType$1(context))) {
-          return null;
-      }
-      if (name in context) {
-          return context[name];
-      }
-      const normalizedName = normalizeContextKey$1(name);
-      if (normalizedName in context) {
-          return context[normalizedName];
-      }
-      const entry = Object.entries(context).find(([key]) => normalizedName === normalizeContextKey$1(key));
-      if (entry) {
-          return entry[1];
-      }
-      return null;
+  function isContext(e) {
+      return Object.getPrototypeOf(e) === Object.prototype;
   }
-
-  function isDateTime$1(obj) {
+  function isDateTime(obj) {
       return DateTime.isDateTime(obj);
   }
-  function isDuration$1(obj) {
+  function isDuration(obj) {
       return Duration.isDuration(obj);
   }
-  function duration$2(opts) {
-      if (typeof opts === 'number') {
-          return Duration.fromMillis(opts);
-      }
-      return Duration.fromISO(opts);
-  }
-  function date$1(str = null, time = null, zone = null) {
-      if (time) {
-          if (str) {
-              throw new Error('<str> and <time> provided');
-          }
-          return date$1(`1900-01-01T${time}`);
-      }
-      if (typeof str === 'string') {
-          if (str.startsWith('-')) {
-              throw notImplemented$1('negative date');
-          }
-          if (!str.includes('T')) {
-              // raw dates are in UTC time zone
-              return date$1(str + 'T00:00:00.000Z');
-          }
-          if (str.includes('@')) {
-              if (zone) {
-                  throw new Error('<zone> already provided');
-              }
-              const [datePart, zonePart] = str.split('@');
-              return date$1(datePart, null, Info.normalizeZone(zonePart));
-          }
-          return DateTime.fromISO(str.toUpperCase(), {
-              setZone: true,
-              zone
-          });
-      }
-      return DateTime.now();
-  }
-
-  function isContext$1(e) {
-      return Object.getPrototypeOf(e) === Object.prototype;
-  }
-  function isArray$2(e) {
+  function isArray$1(e) {
       return Array.isArray(e);
   }
-  function isBoolean$1(e) {
+  function isBoolean(e) {
       return typeof e === 'boolean';
   }
-  function getType$1(e) {
+  function getType(e) {
       if (e === null || e === undefined) {
           return 'nil';
       }
-      if (isBoolean$1(e)) {
+      if (isBoolean(e)) {
           return 'boolean';
       }
-      if (isNumber$1(e)) {
+      if (isNumber(e)) {
           return 'number';
       }
-      if (isString$1(e)) {
+      if (isString(e)) {
           return 'string';
       }
-      if (isContext$1(e)) {
+      if (isContext(e)) {
           return 'context';
       }
-      if (isArray$2(e)) {
+      if (isArray$1(e)) {
           return 'list';
       }
-      if (isDuration$1(e)) {
+      if (isDuration(e)) {
           return 'duration';
       }
-      if (isDateTime$1(e)) {
+      if (isDateTime(e)) {
           if (e.year === 1900 &&
               e.month === 1 &&
               e.day === 1) {
@@ -12624,19 +13843,19 @@
           }
           return 'date time';
       }
-      if (e instanceof Range$2) {
+      if (e instanceof Range$1) {
           return 'range';
       }
-      if (e instanceof FunctionWrapper$1) {
+      if (e instanceof FunctionWrapper) {
           return 'function';
       }
       return 'literal';
   }
-  function isType$1(el, type) {
-      return getType$1(el) === type;
+  function isType(el, type) {
+      return getType(el) === type;
   }
-  function typeCast$1(obj, type) {
-      if (isDateTime$1(obj)) {
+  function typeCast(obj, type) {
+      if (isDateTime(obj)) {
           if (type === 'time') {
               return obj.set({
                   year: 1900,
@@ -12653,30 +13872,30 @@
       }
       return null;
   }
-  let Range$2 = class Range {
+  let Range$1 = class Range {
       constructor(props) {
           Object.assign(this, props);
       }
   };
-  function isNumber$1(obj) {
+  function isNumber(obj) {
       return typeof obj === 'number';
   }
-  function isString$1(obj) {
+  function isString(obj) {
       return typeof obj === 'string';
   }
-  function equals$1(a, b) {
+  function equals(a, b) {
       if (a === null && b !== null ||
           a !== null && b === null) {
           return false;
       }
-      if (isArray$2(a) && a.length < 2) {
+      if (isArray$1(a) && a.length < 2) {
           a = a[0];
       }
-      if (isArray$2(b) && b.length < 2) {
+      if (isArray$1(b) && b.length < 2) {
           b = b[0];
       }
-      const aType = getType$1(a);
-      const bType = getType$1(b);
+      const aType = getType(a);
+      const bType = getType(b);
       if (aType !== bType) {
           return null;
       }
@@ -12687,7 +13906,7 @@
           if (a.length !== b.length) {
               return false;
           }
-          return a.every((element, idx) => equals$1(element, b[idx]));
+          return a.every((element, idx) => equals(element, b[idx]));
       }
       if (aType === 'date time' || aType === 'time' || aType === 'date') {
           return (a.toUTC().valueOf() === b.toUTC().valueOf());
@@ -12708,7 +13927,7 @@
           if (aEntries.length !== bEntries.length) {
               return false;
           }
-          return aEntries.every(([key, value]) => key in b && equals$1(value, b[key]));
+          return aEntries.every(([key, value]) => key in b && equals(value, b[key]));
       }
       if (aType === 'range') {
           return [
@@ -12723,14 +13942,14 @@
       }
       return aType === bType ? false : null;
   }
-  let FunctionWrapper$1 = class FunctionWrapper {
+  class FunctionWrapper {
       constructor(fn, parameterNames) {
           this.fn = fn;
           this.parameterNames = parameterNames;
       }
       invoke(contextOrArgs) {
           let params;
-          if (isArray$2(contextOrArgs)) {
+          if (isArray$1(contextOrArgs)) {
               params = contextOrArgs;
           }
           else {
@@ -12738,89 +13957,167 @@
           }
           return this.fn.call(null, ...params);
       }
-  };
+  }
+
+  function parseParameterNames(fn) {
+      if (Array.isArray(fn.$args)) {
+          return fn.$args;
+      }
+      const code = fn.toString();
+      const match = /^(?:[^(]*\s*)?\(([^)]+)?\)/.exec(code);
+      if (!match) {
+          throw new Error('failed to parse params: ' + code);
+      }
+      const [_, params] = match;
+      if (!params) {
+          return [];
+      }
+      return params.split(',').map(p => p.trim());
+  }
+  function notImplemented(thing) {
+      return new Error(`not implemented: ${thing}`);
+  }
+  /**
+   * @param {string} name
+   * @param {Record<string, any>} context
+   *
+   * @return {any}
+   */
+  function getFromContext(name, context) {
+      if (['nil', 'boolean', 'number', 'string'].includes(getType(context))) {
+          return null;
+      }
+      if (name in context) {
+          return context[name];
+      }
+      const normalizedName = normalizeContextKey(name);
+      if (normalizedName in context) {
+          return context[normalizedName];
+      }
+      const entry = Object.entries(context).find(([key]) => normalizedName === normalizeContextKey(key));
+      if (entry) {
+          return entry[1];
+      }
+      return null;
+  }
+
+  function duration$1(opts) {
+      if (typeof opts === 'number') {
+          return Duration.fromMillis(opts);
+      }
+      return Duration.fromISO(opts);
+  }
+  function date(str = null, time = null, zone = null) {
+      if (time) {
+          if (str) {
+              throw new Error('<str> and <time> provided');
+          }
+          return date(`1900-01-01T${time}`);
+      }
+      if (typeof str === 'string') {
+          if (str.startsWith('-')) {
+              throw notImplemented('negative date');
+          }
+          if (!str.includes('T')) {
+              // raw dates are in UTC time zone
+              return date(str + 'T00:00:00.000Z');
+          }
+          if (str.includes('@')) {
+              if (zone) {
+                  throw new Error('<zone> already provided');
+              }
+              const [datePart, zonePart] = str.split('@');
+              return date(datePart, null, Info.normalizeZone(zonePart));
+          }
+          return DateTime.fromISO(str.toUpperCase(), {
+              setZone: true,
+              zone
+          });
+      }
+      return DateTime.now();
+  }
 
   // 10.3.4 Built-in functions
-  const builtins$1 = {
+  const builtins = {
       // 10.3.4.1 Conversion functions
       'number': function () {
-          throw notImplemented$1('number');
+          throw notImplemented('number');
       },
-      'string': fn$1(function (from) {
+      'string': fn(function (from) {
           if (arguments.length !== 1) {
               return null;
           }
-          return toString$1(from);
+          return toString(from);
       }, ['any']),
       // date(from) => date string
       // date(from) => date and time
       // date(year, month, day)
-      'date': fn$1(function (year, month, day, from) {
-          if (!from && !isNumber$1(year)) {
+      'date': fn(function (year, month, day, from) {
+          if (!from && !isNumber(year)) {
               from = year;
               year = null;
           }
           let d;
-          if (isString$1(from)) {
-              d = date$1(from);
+          if (isString(from)) {
+              d = date(from);
           }
-          if (isDateTime$1(from)) {
+          if (isDateTime(from)) {
               d = from;
           }
           if (year) {
-              d = date$1().setZone('utc').set({
+              d = date().setZone('utc').set({
                   year,
                   month,
                   day
               });
           }
-          return d && ifValid$1(d.setZone('utc').startOf('day')) || null;
+          return d && ifValid(d.setZone('utc').startOf('day')) || null;
       }, ['any?', 'number?', 'number?', 'any?']),
       // date and time(from) => date time string
       // date and time(date, time)
-      'date and time': fn$1(function (d, time, from) {
+      'date and time': fn(function (d, time, from) {
           let dt;
-          if (isDateTime$1(d) && isDateTime$1(time)) {
+          if (isDateTime(d) && isDateTime(time)) {
               dt = time.set({
                   year: d.year,
                   month: d.month,
                   day: d.day
               });
           }
-          if (isString$1(d)) {
+          if (isString(d)) {
               from = d;
               d = null;
           }
-          if (isString$1(from)) {
-              dt = date$1(from);
+          if (isString(from)) {
+              dt = date(from);
           }
-          return dt && ifValid$1(dt) || null;
+          return dt && ifValid(dt) || null;
       }, ['any?', 'time?', 'string?'], ['date', 'time', 'from']),
       // time(from) => time string
       // time(from) => time, date and time
       // time(hour, minute, second, offset?) => ...
-      'time': fn$1(function (hour, minute, second, offset, from) {
+      'time': fn(function (hour, minute, second, offset, from) {
           let t;
           if (offset) {
-              throw notImplemented$1('time(..., offset)');
+              throw notImplemented('time(..., offset)');
           }
-          if (isString$1(hour) || isDateTime$1(hour)) {
+          if (isString(hour) || isDateTime(hour)) {
               from = hour;
               hour = null;
           }
-          if (isString$1(from)) {
-              t = date$1(null, from);
+          if (isString(from)) {
+              t = date(null, from);
           }
-          if (isDateTime$1(from)) {
+          if (isDateTime(from)) {
               t = from.set({
                   year: 1900,
                   month: 1,
                   day: 1
               });
           }
-          if (isNumber$1(hour)) {
+          if (isNumber(hour)) {
               // TODO: support offset = days and time duration
-              t = date$1().set({
+              t = date().set({
                   hour,
                   minute,
                   second
@@ -12831,104 +14128,104 @@
                   millisecond: 0
               });
           }
-          return t && ifValid$1(t) || null;
+          return t && ifValid(t) || null;
       }, ['any?', 'number?', 'number?', 'any?', 'any?']),
-      'duration': fn$1(function (from) {
-          return ifValid$1(duration$2(from));
+      'duration': fn(function (from) {
+          return ifValid(duration$1(from));
       }, ['string']),
-      'years and months duration': fn$1(function (from, to) {
-          return ifValid$1(to.diff(from, ['years', 'months']));
+      'years and months duration': fn(function (from, to) {
+          return ifValid(to.diff(from, ['years', 'months']));
       }, ['date', 'date']),
-      '@': fn$1(function (string) {
+      '@': fn(function (string) {
           let t;
           if (/^-?P/.test(string)) {
-              t = duration$2(string);
+              t = duration$1(string);
           }
           else if (/^[\d]{1,2}:[\d]{1,2}:[\d]{1,2}/.test(string)) {
-              t = date$1(null, string);
+              t = date(null, string);
           }
           else {
-              t = date$1(string);
+              t = date(string);
           }
-          return t && ifValid$1(t) || null;
+          return t && ifValid(t) || null;
       }, ['string']),
-      'now': fn$1(function () {
-          return date$1();
+      'now': fn(function () {
+          return date();
       }, []),
-      'today': fn$1(function () {
-          return date$1().startOf('day');
+      'today': fn(function () {
+          return date().startOf('day');
       }, []),
       // 10.3.4.2 Boolean function
-      'not': fn$1(function (bool) {
-          return isType$1(bool, 'boolean') ? !bool : null;
+      'not': fn(function (bool) {
+          return isType(bool, 'boolean') ? !bool : null;
       }, ['any']),
       // 10.3.4.3 String functions
-      'substring': fn$1(function (string, start, length) {
+      'substring': fn(function (string, start, length) {
           const _start = (start < 0 ? string.length + start : start - 1);
           const arr = Array.from(string);
           return (typeof length !== 'undefined'
               ? arr.slice(_start, _start + length)
               : arr.slice(_start)).join('');
       }, ['string', 'number', 'number?'], ['string', 'start position', 'length']),
-      'string length': fn$1(function (string) {
-          return countSymbols$1(string);
+      'string length': fn(function (string) {
+          return countSymbols(string);
       }, ['string']),
-      'upper case': fn$1(function (string) {
+      'upper case': fn(function (string) {
           return string.toUpperCase();
       }, ['string']),
-      'lower case': fn$1(function (string) {
+      'lower case': fn(function (string) {
           return string.toLowerCase();
       }, ['string']),
-      'substring before': fn$1(function (string, match) {
+      'substring before': fn(function (string, match) {
           const index = string.indexOf(match);
           if (index === -1) {
               return '';
           }
           return string.substring(0, index);
       }, ['string', 'string']),
-      'substring after': fn$1(function (string, match) {
+      'substring after': fn(function (string, match) {
           const index = string.indexOf(match);
           if (index === -1) {
               return '';
           }
           return string.substring(index + match.length);
       }, ['string', 'string']),
-      'replace': fn$1(function (input, pattern, replacement, flags) {
+      'replace': fn(function (input, pattern, replacement, flags) {
           return input.replace(new RegExp(pattern, 'ug' + (flags || '').replace(/[x]/g, '')), replacement.replace(/\$0/g, '$$&'));
       }, ['string', 'string', 'string', 'string?']),
-      'contains': fn$1(function (string, match) {
+      'contains': fn(function (string, match) {
           return string.includes(match);
       }, ['string', 'string']),
-      'starts with': fn$1(function (string, match) {
+      'starts with': fn(function (string, match) {
           return string.startsWith(match);
       }, ['string', 'string']),
-      'ends with': fn$1(function (string, match) {
+      'ends with': fn(function (string, match) {
           return string.endsWith(match);
       }, ['string', 'string']),
-      'split': fn$1(function (string, delimiter) {
+      'split': fn(function (string, delimiter) {
           return string.split(new RegExp(delimiter, 'u'));
       }, ['string', 'string']),
       // 10.3.4.4 List functions
-      'list contains': fn$1(function (list, element) {
-          return list.some(el => matches$1(el, element));
+      'list contains': fn(function (list, element) {
+          return list.some(el => matches(el, element));
       }, ['list', 'any?']),
-      'count': fn$1(function (list) {
+      'count': fn(function (list) {
           return list.length;
       }, ['list']),
-      'min': listFn$1(function (list) {
+      'min': listFn(function (list) {
           return list.reduce((min, el) => min === null ? el : Math.min(min, el), null);
       }, 'number'),
-      'max': listFn$1(function (list) {
+      'max': listFn(function (list) {
           return list.reduce((max, el) => max === null ? el : Math.max(max, el), null);
       }, 'number'),
-      'sum': listFn$1(function (list) {
-          return sum$1(list);
+      'sum': listFn(function (list) {
+          return sum(list);
       }, 'number'),
-      'mean': listFn$1(function (list) {
-          const s = sum$1(list);
+      'mean': listFn(function (list) {
+          const s = sum(list);
           return s === null ? s : s / list.length;
       }, 'number'),
-      'all': listFn$1(function (list) {
+      'all': listFn(function (list) {
           let nonBool = false;
           for (const o of list) {
               if (o === false) {
@@ -12940,7 +14237,7 @@
           }
           return nonBool ? null : true;
       }, 'any?'),
-      'any': listFn$1(function (list) {
+      'any': listFn(function (list) {
           let nonBool = false;
           for (const o of list) {
               if (o === true) {
@@ -12952,47 +14249,47 @@
           }
           return nonBool ? null : false;
       }, 'any?'),
-      'sublist': fn$1(function (list, start, length) {
+      'sublist': fn(function (list, start, length) {
           const _start = (start < 0 ? list.length + start : start - 1);
           return (typeof length !== 'undefined'
               ? list.slice(_start, _start + length)
               : list.slice(_start));
       }, ['list', 'number', 'number?']),
-      'append': fn$1(function (list, ...items) {
+      'append': fn(function (list, ...items) {
           return list.concat(items);
       }, ['list', 'any?']),
-      'concatenate': fn$1(function (...args) {
+      'concatenate': fn(function (...args) {
           return args.reduce((result, arg) => {
               return result.concat(arg);
           }, []);
       }, ['any']),
-      'insert before': fn$1(function (list, position, newItem) {
+      'insert before': fn(function (list, position, newItem) {
           return list.slice(0, position - 1).concat([newItem], list.slice(position - 1));
       }, ['list', 'number', 'any?']),
-      'remove': fn$1(function (list, position) {
+      'remove': fn(function (list, position) {
           return list.slice(0, position - 1).concat(list.slice(position));
       }, ['list', 'number']),
-      'reverse': fn$1(function (list) {
+      'reverse': fn(function (list) {
           return list.slice().reverse();
       }, ['list']),
-      'index of': fn$1(function (list, match) {
+      'index of': fn(function (list, match) {
           return list.reduce(function (result, element, index) {
-              if (matches$1(element, match)) {
+              if (matches(element, match)) {
                   result.push(index + 1);
               }
               return result;
           }, []);
       }, ['list', 'any']),
-      'union': fn$1(function (..._lists) {
-          throw notImplemented$1('union');
+      'union': fn(function (..._lists) {
+          throw notImplemented('union');
       }, ['list']),
-      'distinct values': fn$1(function (_list) {
-          throw notImplemented$1('distinct values');
+      'distinct values': fn(function (_list) {
+          throw notImplemented('distinct values');
       }, ['list']),
-      'flatten': fn$1(function (list) {
-          return flatten$2(list);
+      'flatten': fn(function (list) {
+          return flatten$1(list);
       }, ['list']),
-      'product': listFn$1(function (list) {
+      'product': listFn(function (list) {
           if (list.length === 0) {
               return null;
           }
@@ -13000,42 +14297,42 @@
               return result * n;
           }, 1);
       }, 'number'),
-      'median': listFn$1(function (list) {
+      'median': listFn(function (list) {
           if (list.length === 0) {
               return null;
           }
-          return median$1(list);
+          return median(list);
       }, 'number'),
-      'stddev': listFn$1(function (list) {
+      'stddev': listFn(function (list) {
           if (list.length < 2) {
               return null;
           }
-          return stddev$1(list);
+          return stddev(list);
       }, 'number'),
-      'mode': listFn$1(function (list) {
-          return mode$1(list);
+      'mode': listFn(function (list) {
+          return mode(list);
       }, 'number'),
       // 10.3.4.5 Numeric functions
-      'decimal': fn$1(function (n, scale) {
+      'decimal': fn(function (n, scale) {
           if (!scale) {
-              return round$2(n);
+              return round(n);
           }
           const offset = Math.pow(10, scale);
-          return round$2(n * offset) / (offset);
+          return round(n * offset) / (offset);
       }, ['number', 'number']),
-      'floor': fn$1(function (n) {
+      'floor': fn(function (n) {
           return Math.floor(n);
       }, ['number']),
-      'ceiling': fn$1(function (n) {
+      'ceiling': fn(function (n) {
           return Math.ceil(n) + 0;
       }, ['number']),
-      'abs': fn$1(function (n) {
+      'abs': fn(function (n) {
           if (typeof n !== 'number') {
               return null;
           }
           return Math.abs(n);
       }, ['number']),
-      'modulo': fn$1(function (dividend, divisor) {
+      'modulo': fn(function (dividend, divisor) {
           if (!divisor) {
               return null;
           }
@@ -13046,99 +14343,99 @@
           // variant is prone to rounding errors
           return Math.round((dividend % divisor + divisor) % divisor * adjust) / adjust;
       }, ['number', 'number']),
-      'sqrt': fn$1(function (number) {
+      'sqrt': fn(function (number) {
           if (number < 0) {
               return null;
           }
           return Math.sqrt(number);
       }, ['number']),
-      'log': fn$1(function (number) {
+      'log': fn(function (number) {
           if (number <= 0) {
               return null;
           }
           return Math.log(number);
       }, ['number']),
-      'exp': fn$1(function (number) {
+      'exp': fn(function (number) {
           return Math.exp(number);
       }, ['number']),
-      'odd': fn$1(function (number) {
+      'odd': fn(function (number) {
           return Math.abs(number) % 2 === 1;
       }, ['number']),
-      'even': fn$1(function (number) {
+      'even': fn(function (number) {
           return Math.abs(number) % 2 === 0;
       }, ['number']),
       // 10.3.4.6 Date and time functions
-      'is': fn$1(function (value1, value2) {
+      'is': fn(function (value1, value2) {
           if (typeof value1 === 'undefined' || typeof value2 === 'undefined') {
               return false;
           }
-          return equals$1(value1, value2);
+          return equals(value1, value2);
       }, ['any?', 'any?']),
       // 10.3.4.7 Range Functions
-      'before': fn$1(function (a, b) {
-          return before$1(a, b);
+      'before': fn(function (a, b) {
+          return before(a, b);
       }, ['any', 'any']),
-      'after': fn$1(function (a, b) {
-          return before$1(b, a);
+      'after': fn(function (a, b) {
+          return before(b, a);
       }, ['any', 'any']),
-      'meets': fn$1(function (a, b) {
-          return meets$1(a, b);
+      'meets': fn(function (a, b) {
+          return meets(a, b);
       }, ['range', 'range']),
-      'met by': fn$1(function (a, b) {
-          return meets$1(b, a);
+      'met by': fn(function (a, b) {
+          return meets(b, a);
       }, ['range', 'range']),
-      'overlaps': fn$1(function () {
-          throw notImplemented$1('overlaps');
+      'overlaps': fn(function () {
+          throw notImplemented('overlaps');
       }, ['any?']),
-      'overlaps before': fn$1(function () {
-          throw notImplemented$1('overlaps before');
+      'overlaps before': fn(function () {
+          throw notImplemented('overlaps before');
       }, ['any?']),
-      'overlaps after': fn$1(function () {
-          throw notImplemented$1('overlaps after');
+      'overlaps after': fn(function () {
+          throw notImplemented('overlaps after');
       }, ['any?']),
-      'finishes': fn$1(function () {
-          throw notImplemented$1('finishes');
+      'finishes': fn(function () {
+          throw notImplemented('finishes');
       }, ['any?']),
-      'finished by': fn$1(function () {
-          throw notImplemented$1('finished by');
+      'finished by': fn(function () {
+          throw notImplemented('finished by');
       }, ['any?']),
-      'includes': fn$1(function () {
-          throw notImplemented$1('includes');
+      'includes': fn(function () {
+          throw notImplemented('includes');
       }, ['any?']),
-      'during': fn$1(function () {
-          throw notImplemented$1('during');
+      'during': fn(function () {
+          throw notImplemented('during');
       }, ['any?']),
-      'starts': fn$1(function () {
-          throw notImplemented$1('starts');
+      'starts': fn(function () {
+          throw notImplemented('starts');
       }, ['any?']),
-      'started by': fn$1(function () {
-          throw notImplemented$1('started by');
+      'started by': fn(function () {
+          throw notImplemented('started by');
       }, ['any?']),
-      'coincides': fn$1(function () {
-          throw notImplemented$1('coincides');
+      'coincides': fn(function () {
+          throw notImplemented('coincides');
       }, ['any?']),
       // 10.3.4.8 Temporal built-in functions
-      'day of year': fn$1(function () {
-          throw notImplemented$1('day of year');
+      'day of year': fn(function () {
+          throw notImplemented('day of year');
       }, ['any?']),
-      'day of week': fn$1(function () {
-          throw notImplemented$1('day of week');
+      'day of week': fn(function () {
+          throw notImplemented('day of week');
       }, ['any?']),
-      'month of year': fn$1(function () {
-          throw notImplemented$1('month of year');
+      'month of year': fn(function () {
+          throw notImplemented('month of year');
       }, ['any?']),
-      'week of year': fn$1(function () {
-          throw notImplemented$1('week of year');
+      'week of year': fn(function () {
+          throw notImplemented('week of year');
       }, ['any?']),
       // 10.3.4.9 Sort
       'sort': function () {
-          throw notImplemented$1('sort');
+          throw notImplemented('sort');
       },
       // 10.3.4.10 Context function
-      'get value': fn$1(function (m, key) {
-          return getFromContext$1(key, m);
+      'get value': fn(function (m, key) {
+          return getFromContext(key, m);
       }, ['context', 'string']),
-      'get entries': fn$1(function (m) {
+      'get entries': fn(function (m) {
           if (arguments.length !== 1) {
               return null;
           }
@@ -13147,21 +14444,21 @@
           }
           return Object.entries(m).map(([key, value]) => ({ key, value }));
       }, ['context']),
-      'context': listFn$1(function (_contexts) {
-          throw notImplemented$1('context');
+      'context': listFn(function (_contexts) {
+          throw notImplemented('context');
       }, 'context'),
-      'context merge': listFn$1(function (_contexts) {
-          throw notImplemented$1('context merge');
+      'context merge': listFn(function (_contexts) {
+          throw notImplemented('context merge');
       }, 'context'),
-      'context put': fn$1(function (_context, _keys, _value) {
-          throw notImplemented$1('context put');
+      'context put': fn(function (_context, _keys, _value) {
+          throw notImplemented('context put');
       }, ['context', 'list', 'any'])
   };
-  function matches$1(a, b) {
+  function matches(a, b) {
       return a === b;
   }
-  const FALSE$1 = {};
-  function createArgTester$1(arg) {
+  const FALSE = {};
+  function createArgTester(arg) {
       const optional = arg.endsWith('?');
       const type = optional ? arg.substring(0, arg.length - 1) : arg;
       return function (obj) {
@@ -13180,20 +14477,20 @@
               obj = obj[0];
           }
           if (type === 'range') {
-              return obj instanceof Range$2 ? obj : FALSE$1;
+              return obj instanceof Range$1 ? obj : FALSE;
           }
-          const objType = getType$1(obj);
+          const objType = getType(obj);
           if (objType === 'nil') {
-              return (optional ? obj : FALSE$1);
+              return (optional ? obj : FALSE);
           }
           if (type === 'any' || type === objType) {
               return obj;
           }
-          return typeCast$1(obj, type) || FALSE$1;
+          return typeCast(obj, type) || FALSE;
       };
   }
-  function createArgsValidator$1(argDefinitions) {
-      const tests = argDefinitions.map(createArgTester$1);
+  function createArgsValidator(argDefinitions) {
+      const tests = argDefinitions.map(createArgTester);
       return function (args) {
           while (args.length < argDefinitions.length) {
               args.push(undefined);
@@ -13204,7 +14501,7 @@
               }
               const test = tests[index];
               const conversion = test ? test(arg) : arg;
-              if (conversion === FALSE$1) {
+              if (conversion === FALSE) {
                   return false;
               }
               result.push(conversion);
@@ -13219,8 +14516,8 @@
    *
    * @return {Function}
    */
-  function listFn$1(fnDefinition, type, parameterNames = null) {
-      const tester = createArgTester$1(type);
+  function listFn(fnDefinition, type, parameterNames = null) {
+      const tester = createArgTester(type);
       const wrappedFn = function (...args) {
           if (args.length === 0) {
               return null;
@@ -13229,12 +14526,12 @@
           if (Array.isArray(args[0]) && args.length === 1) {
               args = args[0];
           }
-          if (!args.every(arg => tester(arg) !== FALSE$1)) {
+          if (!args.every(arg => tester(arg) !== FALSE)) {
               return null;
           }
           return fnDefinition(args);
       };
-      wrappedFn.$args = parameterNames || parseParameterNames$1(fnDefinition);
+      wrappedFn.$args = parameterNames || parseParameterNames(fnDefinition);
       return wrappedFn;
   }
   /**
@@ -13244,9 +14541,9 @@
    *
    * @return {Function}
    */
-  function fn$1(fnDefinition, argDefinitions, parameterNames = null) {
-      const checkArgs = createArgsValidator$1(argDefinitions);
-      parameterNames = parameterNames || parseParameterNames$1(fnDefinition);
+  function fn(fnDefinition, argDefinitions, parameterNames = null) {
+      const checkArgs = createArgsValidator(argDefinitions);
+      parameterNames = parameterNames || parseParameterNames(fnDefinition);
       const wrappedFn = function (...args) {
           const convertedArgs = checkArgs(args);
           if (!convertedArgs) {
@@ -13257,63 +14554,63 @@
       wrappedFn.$args = parameterNames;
       return wrappedFn;
   }
-  function meets$1(a, b) {
+  function meets(a, b) {
       return [
           (a.end === b.start),
           (a['end included'] === true),
           (b['start included'] === true)
       ].every(v => v);
   }
-  function before$1(a, b) {
-      if (a instanceof Range$2 && b instanceof Range$2) {
+  function before(a, b) {
+      if (a instanceof Range$1 && b instanceof Range$1) {
           return (a.end < b.start || (!a['end included'] || !b['start included']) && a.end == b.start);
       }
-      if (a instanceof Range$2) {
+      if (a instanceof Range$1) {
           return (a.end < b || (!a['end included'] && a.end === b));
       }
-      if (b instanceof Range$2) {
+      if (b instanceof Range$1) {
           return (b.start > a || (!b['start included'] && b.start === a));
       }
       return a < b;
   }
-  function sum$1(list) {
+  function sum(list) {
       return list.reduce((sum, el) => sum === null ? el : sum + el, null);
   }
-  function flatten$2([x, ...xs]) {
+  function flatten$1([x, ...xs]) {
       return (x !== undefined
-          ? [...Array.isArray(x) ? flatten$2(x) : [x], ...flatten$2(xs)]
+          ? [...Array.isArray(x) ? flatten$1(x) : [x], ...flatten$1(xs)]
           : []);
   }
-  function toKeyString$1(key) {
+  function toKeyString(key) {
       if (typeof key === 'string' && /\W/.test(key)) {
-          return toString$1(key, true);
+          return toString(key, true);
       }
       return key;
   }
-  function toDeepString$1(obj) {
-      return toString$1(obj, true);
+  function toDeepString(obj) {
+      return toString(obj, true);
   }
-  function escapeStr$1(str) {
+  function escapeStr(str) {
       return str.replace(/("|\\)/g, '\\$1');
   }
-  function toString$1(obj, wrap = false) {
+  function toString(obj, wrap = false) {
       var _a, _b, _c, _d;
-      const type = getType$1(obj);
+      const type = getType(obj);
       if (type === 'nil') {
           return 'null';
       }
       if (type === 'string') {
-          return wrap ? `"${escapeStr$1(obj)}"` : obj;
+          return wrap ? `"${escapeStr(obj)}"` : obj;
       }
       if (type === 'boolean' || type === 'number') {
           return String(obj);
       }
       if (type === 'list') {
-          return '[' + obj.map(toDeepString$1).join(', ') + ']';
+          return '[' + obj.map(toDeepString).join(', ') + ']';
       }
       if (type === 'context') {
           return '{' + Object.entries(obj).map(([key, value]) => {
-              return toKeyString$1(key) + ': ' + toDeepString$1(value);
+              return toKeyString(key) + ': ' + toDeepString(value);
           }).join(', ') + '}';
       }
       if (type === 'duration') {
@@ -13340,13 +14637,13 @@
       if (type === 'function') {
           return '<function>';
       }
-      throw notImplemented$1('string(' + type + ')');
+      throw notImplemented('string(' + type + ')');
   }
-  function countSymbols$1(str) {
+  function countSymbols(str) {
       // cf. https://mathiasbynens.be/notes/javascript-unicode
       return str.replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, '_').length;
   }
-  function round$2(n) {
+  function round(n) {
       const integral = Math.trunc(n);
       if (n - integral > .5) {
           return integral + 1;
@@ -13356,12 +14653,12 @@
       }
   }
   // adapted from https://stackoverflow.com/a/53577159
-  function stddev$1(array) {
+  function stddev(array) {
       const n = array.length;
       const mean = array.reduce((a, b) => a + b) / n;
       return Math.sqrt(array.map(x => Math.pow(x - mean, 2)).reduce((a, b) => a + b) / (n - 1));
   }
-  function median$1(array) {
+  function median(array) {
       const n = array.length;
       const sorted = array.slice().sort();
       const mid = n / 2 - 1;
@@ -13373,7 +14670,7 @@
       // uneven
       return sorted[index];
   }
-  function mode$1(array) {
+  function mode(array) {
       if (array.length < 2) {
           return array;
       }
@@ -13384,24 +14681,24 @@
       const sorted = Object.entries(buckets).sort((a, b) => b[1] - a[1]);
       return sorted.filter(s => s[1] === sorted[0][1]).map(e => +e[0]);
   }
-  function ifValid$1(o) {
+  function ifValid(o) {
       return o.isValid ? o : null;
   }
 
-  function parseExpressions$1(expression, context = {}) {
-      return parser$2.configure({
-          top: 'Expressions',
-          contextTracker: trackVariables$1(context)
+  function parseExpression(expression, context = {}) {
+      return parser$1.configure({
+          top: 'Expression',
+          contextTracker: trackVariables(context)
       }).parse(expression);
   }
-  function parseUnaryTests$1(expression, context = {}) {
-      return parser$2.configure({
+  function parseUnaryTests(expression, context = {}) {
+      return parser$1.configure({
           top: 'UnaryTests',
-          contextTracker: trackVariables$1(context)
+          contextTracker: trackVariables(context)
       }).parse(expression);
   }
 
-  let Interpreter$1 = class Interpreter {
+  class Interpreter {
       _buildExecutionTree(tree, input) {
           const root = { args: [], nodeInput: input };
           const stack = [root];
@@ -13427,14 +14724,14 @@
                   }
                   const { nodeInput, args } = stack.pop();
                   const parent = stack[stack.length - 1];
-                  const expr = evalNode$1(nodeRef, nodeInput, args);
+                  const expr = evalNode(nodeRef, nodeInput, args);
                   parent.args.push(expr);
               }
           });
           return root.args[root.args.length - 1];
       }
       evaluate(expression, context = {}) {
-          const parseTree = parseExpressions$1(expression, context);
+          const parseTree = parseExpression(expression, context);
           const root = this._buildExecutionTree(parseTree, expression);
           return {
               parseTree,
@@ -13442,47 +14739,41 @@
           };
       }
       unaryTest(expression, context = {}) {
-          const parseTree = parseUnaryTests$1(expression, context);
+          const parseTree = parseUnaryTests(expression, context);
           const root = this._buildExecutionTree(parseTree, expression);
           return {
               parseTree,
               root
           };
       }
-  };
-  const interpreter$1 = new Interpreter$1();
+  }
+  const interpreter = new Interpreter();
   function unaryTest(expression, context = {}) {
       const value = context['?'] || null;
-      const { root } = interpreter$1.unaryTest(expression, context);
+      const { root } = interpreter.unaryTest(expression, context);
       // root = fn(ctx) => test(val)
       const test = root(context);
       return test(value);
   }
-  function evaluate$2(expression, context = {}) {
-      const { root } = interpreter$1.evaluate(expression, context);
-      // root = [ fn(ctx) ]
-      const results = root(context);
-      if (results.length === 1) {
-          return results[0];
-      }
-      else {
-          return results;
-      }
+  function evaluate$1(expression, context = {}) {
+      const { root } = interpreter.evaluate(expression, context);
+      // root = Expression :: fn(ctx)
+      return root(context);
   }
-  function evalNode$1(node, input, args) {
+  function evalNode(node, input, args) {
       switch (node.name) {
           case 'ArithOp': return (context) => {
               const nullable = (op, types = ['number']) => (a, b) => {
                   const left = a(context);
                   const right = b(context);
-                  if (isArray$2(left)) {
+                  if (isArray$1(left)) {
                       return null;
                   }
-                  if (isArray$2(right)) {
+                  if (isArray$1(right)) {
                       return null;
                   }
-                  const leftType = getType$1(left);
-                  const rightType = getType$1(right);
+                  const leftType = getType(left);
+                  const rightType = getType(right);
                   if (leftType !== rightType ||
                       !types.includes(leftType)) {
                       return null;
@@ -13498,21 +14789,21 @@
                   case '^': return nullable((a, b) => Math.pow(a, b));
               }
           };
-          case 'CompareOp': return tag$1(() => {
+          case 'CompareOp': return tag(() => {
               switch (input) {
-                  case '>': return (b) => createRange$1(b, null, false, false);
-                  case '>=': return (b) => createRange$1(b, null, true, false);
-                  case '<': return (b) => createRange$1(null, b, false, false);
-                  case '<=': return (b) => createRange$1(null, b, false, true);
-                  case '=': return (b) => (a) => equals$1(a, b);
-                  case '!=': return (b) => (a) => !equals$1(a, b);
-              }
-          }, Test$1('boolean'));
+                  case '>': return (b) => createRange(b, null, false, false);
+                  case '>=': return (b) => createRange(b, null, true, false);
+                  case '<': return (b) => createRange(null, b, false, false);
+                  case '<=': return (b) => createRange(null, b, false, true);
+                  case '=': return (b) => (a) => equals(a, b);
+                  case '!=': return (b) => (a) => !equals(a, b);
+              }
+          }, Test('boolean'));
           case 'Wildcard': return (_context) => true;
           case 'null': return (_context) => {
               return null;
           };
-          case 'Disjunction': return tag$1((context) => {
+          case 'Disjunction': return tag((context) => {
               const left = args[0](context);
               const right = args[2](context);
               const matrix = [
@@ -13529,8 +14820,8 @@
               const a = typeof left === 'boolean' ? left : null;
               const b = typeof right === 'boolean' ? right : null;
               return matrix.find(el => el[0] === a && el[1] === b)[2];
-          }, Test$1('boolean'));
-          case 'Conjunction': return tag$1((context) => {
+          }, Test('boolean'));
+          case 'Conjunction': return tag((context) => {
               const left = args[0](context);
               const right = args[2](context);
               const matrix = [
@@ -13547,7 +14838,7 @@
               const a = typeof left === 'boolean' ? left : null;
               const b = typeof right === 'boolean' ? right : null;
               return matrix.find(el => el[0] === a && el[1] === b)[2];
-          }, Test$1('boolean'));
+          }, Test('boolean'));
           case 'Context': return (context) => {
               return args.slice(1, -1).reduce((obj, arg) => {
                   const [key, value] = arg(Object.assign(Object.assign({}, context), obj));
@@ -13561,7 +14852,7 @@
           case 'FunctionDefinition': return (context) => {
               const parameterNames = args[2];
               const fnBody = args[4];
-              return wrapFunction$1((...args) => {
+              return wrapFunction((...args) => {
                   const fnContext = parameterNames.reduce((context, name, idx) => {
                       // support positional parameters
                       context[name] = args[idx];
@@ -13577,33 +14868,33 @@
           };
           case 'Key': return args[0];
           case 'Identifier': return input;
-          case 'SpecialFunctionName': return (context) => getBuiltin$1(input);
+          case 'SpecialFunctionName': return (context) => getBuiltin(input);
           // preserve spaces in name, but compact multiple
           // spaces into one (token)
           case 'Name': return input.replace(/\s{2,}/g, ' ');
           case 'VariableName': return (context) => {
               const name = args.join(' ');
-              return getBuiltin$1(name) || getFromContext$1(name, context);
+              return getBuiltin(name) || getFromContext(name, context);
           };
           case 'QualifiedName': return (context) => {
               return args.reduce((context, arg) => arg(context), context);
           };
-          case '?': return (context) => getFromContext$1('?', context);
+          case '?': return (context) => getFromContext('?', context);
           // expression
           // expression ".." expression
           case 'IterationContext': return (context) => {
               const a = args[0](context);
               const b = args[1] && args[1](context);
-              return b ? createRange$1(a, b) : a;
+              return b ? createRange(a, b) : a;
           };
           case 'Type': return args[0];
           case 'InExpressions': return (context) => {
               const iterationContexts = args.map(ctx => ctx(context));
-              if (iterationContexts.some(ctx => getType$1(ctx) !== 'list')) {
+              if (iterationContexts.some(ctx => getType(ctx) !== 'list')) {
                   return null;
               }
-              return cartesianProduct$1(iterationContexts).map(ctx => {
-                  if (!isArray$2(ctx)) {
+              return cartesianProduct(iterationContexts).map(ctx => {
+                  if (!isArray$1(ctx)) {
                       ctx = [ctx];
                   }
                   return Object.assign({}, context, ...ctx);
@@ -13611,35 +14902,35 @@
           };
           // Name kw<"in"> Expr
           case 'InExpression': return (context) => {
-              return extractValue$1(context, args[0], args[2]);
+              return extractValue(context, args[0], args[2]);
           };
-          case 'SpecialType': throw notImplemented$1('SpecialType');
-          case 'InstanceOfExpression': return tag$1((context) => {
+          case 'SpecialType': throw notImplemented('SpecialType');
+          case 'InstanceOfExpression': return tag((context) => {
               const a = args[0](context);
               const b = args[3](context);
               return a instanceof b;
-          }, Test$1('boolean'));
-          case 'every': return tag$1((context) => {
+          }, Test('boolean'));
+          case 'every': return tag((context) => {
               return (_contexts, _condition) => {
                   const contexts = _contexts(context);
-                  if (getType$1(contexts) !== 'list') {
+                  if (getType(contexts) !== 'list') {
                       return contexts;
                   }
-                  return contexts.every(ctx => isTruthy$1(_condition(ctx)));
+                  return contexts.every(ctx => isTruthy(_condition(ctx)));
               };
-          }, Test$1('boolean'));
-          case 'some': return tag$1((context) => {
+          }, Test('boolean'));
+          case 'some': return tag((context) => {
               return (_contexts, _condition) => {
                   const contexts = _contexts(context);
-                  if (getType$1(contexts) !== 'list') {
+                  if (getType(contexts) !== 'list') {
                       return contexts;
                   }
-                  return contexts.some(ctx => isTruthy$1(_condition(ctx)));
+                  return contexts.some(ctx => isTruthy(_condition(ctx)));
               };
-          }, Test$1('boolean'));
-          case 'NumericLiteral': return tag$1((_context) => input.includes('.') ? parseFloat(input) : parseInt(input), 'number');
-          case 'BooleanLiteral': return tag$1((_context) => input === 'true' ? true : false, 'boolean');
-          case 'StringLiteral': return tag$1((_context) => parseString$1(input), 'string');
+          }, Test('boolean'));
+          case 'NumericLiteral': return tag((_context) => input.includes('.') ? parseFloat(input) : parseInt(input), 'number');
+          case 'BooleanLiteral': return tag((_context) => input === 'true' ? true : false, 'boolean');
+          case 'StringLiteral': return tag((_context) => parseString(input), 'string');
           case 'PositionalParameters': return (context) => args.map(arg => arg(context));
           case 'NamedParameter': return (context) => {
               const name = args[0];
@@ -13652,7 +14943,7 @@
               return args;
           }, {});
           case 'DateTimeConstructor': return (context) => {
-              return getBuiltin$1(input);
+              return getBuiltin(input);
           };
           case 'DateTimeLiteral': return (context) => {
               // AtLiteral
@@ -13661,25 +14952,31 @@
               }
               // FunctionInvocation
               else {
-                  const wrappedFn = wrapFunction$1(args[0](context));
+                  const wrappedFn = wrapFunction(args[0](context));
+                  // TODO(nikku): indicate as error
+                  // throw new Error(`Failed to evaluate ${input}: Target is not a function`);
                   if (!wrappedFn) {
-                      throw new Error(`Failed to evaluate ${input}: Target is not a function`);
+                      return null;
                   }
                   const contextOrArgs = args[2](context);
                   return wrappedFn.invoke(contextOrArgs);
               }
           };
           case 'AtLiteral': return (context) => {
-              const wrappedFn = wrapFunction$1(getBuiltin$1('@'));
+              const wrappedFn = wrapFunction(getBuiltin('@'));
+              // TODO(nikku): indicate as error
+              // throw new Error(`Failed to evaluate ${input}: Target is not a function`);
               if (!wrappedFn) {
-                  throw new Error(`Failed to evaluate ${input}: Target is not a function`);
+                  return null;
               }
               return wrappedFn.invoke([args[0](context)]);
           };
           case 'FunctionInvocation': return (context) => {
-              const wrappedFn = wrapFunction$1(args[0](context));
+              const wrappedFn = wrapFunction(args[0](context));
+              // TODO(nikku): indicate error at node
+              // throw new Error(`Failed to evaluate ${input}: Target is not a function`);
               if (!wrappedFn) {
-                  throw new Error(`Failed to evaluate ${input}: Target is not a function`);
+                  return null;
               }
               const contextOrArgs = args[2](context);
               return wrappedFn.invoke(contextOrArgs);
@@ -13688,9 +14985,9 @@
               const ifCondition = args[1];
               const thenValue = args[3];
               const elseValue = args[5];
-              const type = coalecenseTypes$1(thenValue, elseValue);
-              return tag$1((context) => {
-                  if (isTruthy$1(ifCondition(context))) {
+              const type = coalecenseTypes(thenValue, elseValue);
+              return tag((context) => {
+                  if (isTruthy(ifCondition(context))) {
                       return thenValue(context);
                   }
                   else {
@@ -13704,7 +15001,7 @@
               // expression !compare kw<"in"> PositiveUnaryTest |
               // expression !compare kw<"in"> !unaryTest "(" PositiveUnaryTests ")"
               if (operator === 'in') {
-                  return compareIn$1(args[0](context), (args[3] || args[2])(context));
+                  return compareIn(args[0](context), (args[3] || args[2])(context));
               }
               // expression !compare kw<"between"> expression kw<"and"> expression
               if (operator === 'between') {
@@ -13713,14 +15010,14 @@
                   if (start === null || end === null) {
                       return null;
                   }
-                  return createRange$1(start, end).includes(args[0](context));
+                  return createRange(start, end).includes(args[0](context));
               }
               // expression !compare CompareOp<"=" | "!="> expression |
               // expression !compare CompareOp<Gt | Gte | Lt | Lte> expression |
               const left = args[0](context);
               const right = args[2](context);
               const test = operator()(right);
-              return compareValue$1(test, left);
+              return compareValue(test, left);
           };
           case 'QuantifiedExpression': return (context) => {
               const testFn = args[0](context);
@@ -13733,7 +15030,7 @@
           case 'ForExpression': return (context) => {
               const extractor = args[args.length - 1];
               const iterationContexts = args[1](context);
-              if (getType$1(iterationContexts) !== 'list') {
+              if (getType(iterationContexts) !== 'list') {
                   return iterationContexts;
               }
               const partial = [];
@@ -13746,14 +15043,14 @@
               // binary expression (a + b)
               if (args.length === 3) {
                   const [a, op, b] = args;
-                  return tag$1((context) => {
+                  return tag((context) => {
                       return op(context)(a, b);
-                  }, coalecenseTypes$1(a, b));
+                  }, coalecenseTypes(a, b));
               }
               // unary expression (-b)
               if (args.length === 2) {
                   const [op, value] = args;
-                  return tag$1((context) => {
+                  return tag((context) => {
                       return op(context)(() => 0, value);
                   }, value.type);
               }
@@ -13761,10 +15058,10 @@
           case 'PositiveUnaryTest': return args[0];
           case 'ParenthesizedExpression': return args[1];
           case 'PathExpression': return (context) => {
-              const pathTarget = args[0](context);
+              const pathTarget = coerceSingleton(args[0](context));
               const pathProp = args[1];
-              if (isArray$2(pathTarget)) {
-                  return coerceSingleton$1(pathTarget.map(pathProp));
+              if (isArray$1(pathTarget)) {
+                  return pathTarget.map(pathProp);
               }
               else {
                   return pathProp(pathTarget);
@@ -13774,7 +15071,7 @@
           case 'FilterExpression': return (context) => {
               const target = args[0](context);
               const filterFn = args[2];
-              const filterTarget = isArray$2(target) ? target : [target];
+              const filterTarget = isArray$1(target) ? target : [target];
               // null[..]
               if (target === null) {
                   return null;
@@ -13811,16 +15108,16 @@
                   if (typeof result === 'function') {
                       result = result(el);
                   }
-                  if (result instanceof Range$2) {
+                  if (result instanceof Range$1) {
                       result = result.includes(el);
                   }
                   if (result === true) {
                       return el;
                   }
                   return result;
-              }).filter(isTruthy$1);
+              }).filter(isTruthy);
           };
-          case 'SimplePositiveUnaryTest': return tag$1((context) => {
+          case 'SimplePositiveUnaryTest': return tag((context) => {
               // <Interval>
               if (args.length === 1) {
                   return args[0](context);
@@ -13831,23 +15128,26 @@
           case 'List': return (context) => {
               return args.slice(1, -1).map(arg => arg(context));
           };
-          case 'Interval': return tag$1((context) => {
+          case 'Interval': return tag((context) => {
               const left = args[1](context);
               const right = args[2](context);
               const startIncluded = left !== null && args[0] === '[';
               const endIncluded = right !== null && args[3] === ']';
-              return createRange$1(left, right, startIncluded, endIncluded);
-          }, Test$1('boolean'));
+              return createRange(left, right, startIncluded, endIncluded);
+          }, Test('boolean'));
           case 'PositiveUnaryTests':
           case 'Expressions': return (context) => {
               return args.map(a => a(context));
           };
+          case 'Expression': return (context) => {
+              return args[0](context);
+          };
           case 'UnaryTests': return (context) => {
               return (value = null) => {
                   const negate = args[0] === 'not';
                   const tests = negate ? args.slice(2, -1) : args;
                   const matches = tests.map(test => test(context)).flat(1).map(test => {
-                      if (isArray$2(test)) {
+                      if (isArray$1(test)) {
                           return test.includes(value);
                       }
                       if (test === null) {
@@ -13856,80 +15156,95 @@
                       if (typeof test === 'boolean') {
                           return test;
                       }
-                      return compareValue$1(test, value);
-                  }).reduce(combineResult$1, undefined);
+                      return compareValue(test, value);
+                  }).reduce(combineResult, undefined);
                   return matches === null ? null : (negate ? !matches : matches);
               };
           };
           default: return node.name;
       }
   }
-  function getBuiltin$1(name, _context) {
-      return getFromContext$1(name, builtins$1);
+  function getBuiltin(name, _context) {
+      return getFromContext(name, builtins);
   }
-  function extractValue$1(context, prop, _target) {
+  function extractValue(context, prop, _target) {
       const target = _target(context);
-      if (['list', 'range'].includes(getType$1(target))) {
+      if (['list', 'range'].includes(getType(target))) {
           return target.map(t => ({ [prop]: t }));
       }
       return null;
   }
-  function compareIn$1(value, tests) {
-      if (!isArray$2(tests)) {
-          if (getType$1(tests) === 'nil') {
+  function compareIn(value, tests) {
+      if (!isArray$1(tests)) {
+          if (getType(tests) === 'nil') {
               return null;
           }
           tests = [tests];
       }
-      return tests.some(test => compareValue$1(test, value));
+      return tests.some(test => compareValue(test, value));
   }
-  function compareValue$1(test, value) {
+  function compareValue(test, value) {
       if (typeof test === 'function') {
           return test(value);
       }
-      if (test instanceof Range$2) {
+      if (test instanceof Range$1) {
           return test.includes(value);
       }
-      return equals$1(test, value);
+      return equals(test, value);
   }
-  const chars$2 = Array.from('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
-  function isTyped$1(type, values) {
-      return (values.some(e => getType$1(e) === type) &&
-          values.every(e => e === null || getType$1(e) === type));
+  const chars = Array.from('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
+  function isTyped(type, values) {
+      return (values.some(e => getType(e) === type) &&
+          values.every(e => e === null || getType(e) === type));
   }
-  function createRange$1(start, end, startIncluded = true, endIncluded = true) {
-      if (isTyped$1('string', [start, end])) {
-          return createStringRange$1(start, end, startIncluded, endIncluded);
+  const nullRange = new Range$1({
+      start: null,
+      end: null,
+      'start included': false,
+      'end included': false,
+      map() {
+          return [];
+      },
+      includes() {
+          return null;
+      }
+  });
+  function createRange(start, end, startIncluded = true, endIncluded = true) {
+      if (isTyped('string', [start, end])) {
+          return createStringRange(start, end, startIncluded, endIncluded);
+      }
+      if (isTyped('number', [start, end])) {
+          return createNumberRange(start, end, startIncluded, endIncluded);
       }
-      if (isTyped$1('number', [start, end])) {
-          return createNumberRange$1(start, end, startIncluded, endIncluded);
+      if (isTyped('duration', [start, end])) {
+          throw notImplemented('range<duration>');
       }
-      if (isTyped$1('duration', [start, end])) {
-          throw notImplemented$1('range<duration>');
+      if (isTyped('time', [start, end])) {
+          throw notImplemented('range<time>');
       }
-      if (isTyped$1('time', [start, end])) {
-          throw notImplemented$1('range<time>');
+      if (isTyped('date time', [start, end])) {
+          throw notImplemented('range<date and time>');
       }
-      if (isTyped$1('date time', [start, end])) {
-          throw notImplemented$1('range<date and time>');
+      if (isTyped('date', [start, end])) {
+          throw notImplemented('range<date>');
       }
-      if (isTyped$1('date', [start, end])) {
-          throw notImplemented$1('range<date>');
+      if (start === null && end === null) {
+          return nullRange;
       }
       throw new Error(`unsupported range: ${start}..${end}`);
   }
-  function noopMap$1() {
+  function noopMap() {
       return () => {
           throw new Error('unsupported range operation: map');
       };
   }
-  function valuesMap$1(values) {
+  function valuesMap(values) {
       return (fn) => values.map(fn);
   }
-  function valuesIncludes$1(values) {
+  function valuesIncludes(values) {
       return (value) => values.includes(value);
   }
-  function numberMap$1(start, end, startIncluded, endIncluded) {
+  function numberMap(start, end, startIncluded, endIncluded) {
       const direction = start > end ? -1 : 1;
       return (fn) => {
           const result = [];
@@ -13948,7 +15263,7 @@
           return result;
       };
   }
-  function includesStart$1(n, inclusive) {
+  function includesStart(n, inclusive) {
       if (inclusive) {
           return (value) => n <= value;
       }
@@ -13956,7 +15271,7 @@
           return (value) => n < value;
       }
   }
-  function includesEnd$1(n, inclusive) {
+  function includesEnd(n, inclusive) {
       if (inclusive) {
           return (value) => n >= value;
       }
@@ -13964,45 +15279,48 @@
           return (value) => n > value;
       }
   }
-  function anyIncludes$1(start, end, startIncluded, endIncluded) {
+  function anyIncludes(start, end, startIncluded, endIncluded) {
       let tests = [];
+      if (start === null && end === null) {
+          return () => null;
+      }
       if (start !== null && end !== null) {
           if (start > end) {
               tests = [
-                  includesStart$1(end, endIncluded),
-                  includesEnd$1(start, startIncluded)
+                  includesStart(end, endIncluded),
+                  includesEnd(start, startIncluded)
               ];
           }
           else {
               tests = [
-                  includesStart$1(start, startIncluded),
-                  includesEnd$1(end, endIncluded)
+                  includesStart(start, startIncluded),
+                  includesEnd(end, endIncluded)
               ];
           }
       }
       else if (end !== null) {
           tests = [
-              includesEnd$1(end, endIncluded)
+              includesEnd(end, endIncluded)
           ];
       }
       else if (start !== null) {
           tests = [
-              includesStart$1(start, startIncluded)
+              includesStart(start, startIncluded)
           ];
       }
-      return (value) => tests.every(t => t(value));
+      return (value) => value === null ? null : tests.every(t => t(value));
   }
-  function createStringRange$1(start, end, startIncluded = true, endIncluded = true) {
-      if (start !== null && !chars$2.includes(start)) {
+  function createStringRange(start, end, startIncluded = true, endIncluded = true) {
+      if (start !== null && !chars.includes(start)) {
           throw new Error('illegal range start: ' + start);
       }
-      if (end !== null && !chars$2.includes(end)) {
+      if (end !== null && !chars.includes(end)) {
           throw new Error('illegal range end: ' + end);
       }
       let values;
       if (start !== null && end !== null) {
-          let startIdx = chars$2.indexOf(start);
-          let endIdx = chars$2.indexOf(end);
+          let startIdx = chars.indexOf(start);
+          let endIdx = chars.indexOf(end);
           const direction = startIdx > endIdx ? -1 : 1;
           if (startIncluded === false) {
               startIdx += direction;
@@ -14010,11 +15328,11 @@
           if (endIncluded === false) {
               endIdx -= direction;
           }
-          values = chars$2.slice(startIdx, endIdx + 1);
+          values = chars.slice(startIdx, endIdx + 1);
       }
-      const map = values ? valuesMap$1(values) : noopMap$1();
-      const includes = values ? valuesIncludes$1(values) : anyIncludes$1(start, end, startIncluded, endIncluded);
-      return new Range$2({
+      const map = values ? valuesMap(values) : noopMap();
+      const includes = values ? valuesIncludes(values) : anyIncludes(start, end, startIncluded, endIncluded);
+      return new Range$1({
           start,
           end,
           'start included': startIncluded,
@@ -14023,10 +15341,10 @@
           includes
       });
   }
-  function createNumberRange$1(start, end, startIncluded, endIncluded) {
-      const map = start !== null && end !== null ? numberMap$1(start, end, startIncluded, endIncluded) : noopMap$1();
-      const includes = anyIncludes$1(start, end, startIncluded, endIncluded);
-      return new Range$2({
+  function createNumberRange(start, end, startIncluded, endIncluded) {
+      const map = start !== null && end !== null ? numberMap(start, end, startIncluded, endIncluded) : noopMap();
+      const includes = anyIncludes(start, end, startIncluded, endIncluded);
+      return new Range$1({
           start,
           end,
           'start included': startIncluded,
@@ -14035,15 +15353,15 @@
           includes
       });
   }
-  function cartesianProduct$1(arrays) {
-      if (arrays.some(arr => getType$1(arr) === 'nil')) {
+  function cartesianProduct(arrays) {
+      if (arrays.some(arr => getType(arr) === 'nil')) {
           return null;
       }
       const f = (a, b) => [].concat(...a.map(d => b.map(e => [].concat(d, e))));
       const cartesian = (a, b, ...c) => (b ? cartesian(f(a, b), ...c) : a || []);
       return cartesian(...arrays);
   }
-  function coalecenseTypes$1(a, b) {
+  function coalecenseTypes(a, b) {
       if (!b) {
           return a.type;
       }
@@ -14052,7 +15370,7 @@
       }
       return 'any';
   }
-  function tag$1(fn, type) {
+  function tag(fn, type) {
       return Object.assign(fn, {
           type,
           toString() {
@@ -14060,16 +15378,16 @@
           }
       });
   }
-  function combineResult$1(result, match) {
+  function combineResult(result, match) {
       if (!result) {
           return match;
       }
       return result;
   }
-  function isTruthy$1(obj) {
+  function isTruthy(obj) {
       return obj !== false && obj !== null;
   }
-  function Test$1(type) {
+  function Test(type) {
       return `Test<${type}>`;
   }
   /**
@@ -14078,19 +15396,22 @@
    *
    * @return {FunctionWrapper}
    */
-  function wrapFunction$1(fn, parameterNames = null) {
+  function wrapFunction(fn, parameterNames = null) {
       if (!fn) {
           return null;
       }
-      if (fn instanceof FunctionWrapper$1) {
+      if (fn instanceof FunctionWrapper) {
           return fn;
       }
-      if (fn instanceof Range$2) {
-          return new FunctionWrapper$1((value) => fn.includes(value), ['value']);
+      if (fn instanceof Range$1) {
+          return new FunctionWrapper((value) => fn.includes(value), ['value']);
+      }
+      if (typeof fn !== 'function') {
+          return null;
       }
-      return new FunctionWrapper$1(fn, parameterNames || parseParameterNames$1(fn));
+      return new FunctionWrapper(fn, parameterNames || parseParameterNames(fn));
   }
-  function coerceSingleton$1(values) {
+  function coerceSingleton(values) {
       if (Array.isArray(values) && values.length === 1) {
           return values[0];
       }
@@ -14098,7 +15419,7 @@
           return values;
       }
   }
-  function parseString$1(str) {
+  function parseString(str) {
       if (str.startsWith('"')) {
           str = str.slice(1);
       }
@@ -14130,13590 +15451,11264 @@
       });
   }
 
-  // This file was generated by lezer-generator. You probably shouldn't edit it.
-  const propertyIdentifier = 119,
-    identifier = 120,
-    nameIdentifier = 121,
-    insertSemi = 122,
-    expression0 = 126,
-    ForExpression = 4,
-    forExpressionStart = 129,
-    ForInExpression = 7,
-    Name = 8,
-    Identifier = 9,
-    AdditionalIdentifier = 10,
-    forExpressionBodyStart = 137,
-    IfExpression = 18,
-    ifExpressionStart = 138,
-    QuantifiedExpression = 22,
-    quantifiedExpressionStart = 139,
-    QuantifiedInExpression = 26,
-    PositiveUnaryTest = 36,
-    ArithmeticExpression = 40,
-    arithmeticPlusStart = 143,
-    arithmeticTimesStart = 144,
-    arithmeticExpStart = 145,
-    arithmeticUnaryStart = 146,
-    VariableName = 47,
-    PathExpression = 67,
-    pathExpressionStart = 151,
-    FilterExpression = 69,
-    filterExpressionStart = 152,
-    FunctionInvocation = 71,
-    functionInvocationStart = 153,
-    ParameterName = 75,
-    nil = 158,
-    NumericLiteral = 78,
-    StringLiteral = 79,
-    BooleanLiteral = 80,
-    List = 88,
-    listStart = 169,
-    FunctionDefinition = 89,
-    functionDefinitionStart = 171,
-    Context = 96,
-    contextStart = 173,
-    ContextEntry = 97,
-    PropertyName = 99,
-    PropertyIdentifier = 100;
-
-  /* global console,process */
-
-  const LOG_PARSE = typeof process != 'undefined' && process.env && /\bfparse(:dbg)?\b/.test(process.env.LOG);
-  const LOG_PARSE_DEBUG = typeof process != 'undefined' && process.env && /\bfparse:dbg\b/.test(process.env.LOG);
-  const LOG_VARS = typeof process != 'undefined' && process.env && /\bcontext\b/.test(process.env.LOG);
-
-  const spaceChars = [
-    9, 11, 12, 32, 133, 160,
-    5760, 8192, 8193, 8194, 8195, 8196, 8197, 8198,
-    8199, 8200, 8201, 8202, 8232, 8233, 8239, 8287, 12288
-  ];
-
-  const newlineChars = chars$1('\n\r');
-
-  const additionalNameChars = chars$1("'./-+*");
-
-  /**
-   * @param { string } str
-   * @return { number[] }
-   */
-  function chars$1(str) {
-    return Array.from(str).map(s => s.charCodeAt(0));
-  }
-
-  /**
-   * @param { number } ch
-   * @return { boolean }
-   */
-  function isStartChar(ch) {
-    return (
-      ch === 63 // ?
-    ) || (
-      ch === 95 // _
-    ) || (
-      ch >= 65 && ch <= 90 // A-Z
-    ) || (
-      ch >= 97 && ch <= 122 // a-z
-    ) || (
-      ch >= 161 && !isPartChar(ch) && !isSpace(ch)
-    );
-  }
-
-  /**
-   * @param { number } ch
-   * @return { boolean }
-   */
-  function isAdditional(ch) {
-    return additionalNameChars.includes(ch);
-  }
-
-  /**
-   * @param { number } ch
-   * @return { boolean }
-   */
-  function isPartChar(ch) {
-    return (
-      ch >= 48 && ch <= 57 // 0-9
-    ) || (
-      ch === 0xB7
-    ) || (
-      ch >= 0x0300 && ch <= 0x036F
-    ) || (
-      ch >= 0x203F && ch <= 0x2040
-    );
-  }
-
-  /**
-   * @param { number } ch
-   * @return { boolean }
-   */
-  function isSpace(ch) {
-    return spaceChars.includes(ch);
-  }
-
-  // eslint-disable-next-line
-  function indent(str, spaces) {
-    return spaces.concat(
-      str.split(/\n/g).join('\n' + spaces)
-    );
-  }
-
-  /**
-   * @param { import('@lezer/lr').InputStream } input
-   * @param  { number } [offset]
-   * @param { boolean } [includeOperators]
-   *
-   * @return { { token: string, offset: number } | null }
-   */
-  function parseAdditionalSymbol(input, offset = 0) {
-
-    const next = input.peek(offset);
-
-    if (isAdditional(next)) {
-      return {
-        offset: 1,
-        token: String.fromCharCode(next)
-      };
-    }
-
-    return null;
-  }
-
-  /**
-   * @param { import('@lezer/lr').InputStream } input
-   * @param { number } [offset]
-   * @param { boolean } [namePart]
-   *
-   * @return { { token: string, offset: number } | null }
-   */
-  function parseIdentifier(input, offset = 0, namePart = false) {
-    for (let inside = false, chars = [], i = 0;; i++) {
-      const next = input.peek(offset + i);
-
-      if (isStartChar(next) || ((inside || namePart) && isPartChar(next))) {
-        if (!inside) {
-          inside = true;
-        }
-
-        chars.push(next);
-      } else {
-
-        if (chars.length) {
-          return {
-            token: String.fromCharCode(...chars),
-            offset: i
-          };
-        }
-
-        return null;
-      }
-    }
-  }
-
   /**
-   * @param { import('@lezer/lr').InputStream } input
-   * @param  { number } offset
-   *
-   * @return { { token: string, offset: number } | null }
-   */
-  function parseSpaces(input, offset) {
-
-    for (let inside = false, i = 0;; i++) {
-      let next = input.peek(offset + i);
-
-      if (isSpace(next)) {
-        if (!inside) {
-          inside = true;
-        }
-      } else {
-        if (inside) {
-          return {
-            token: ' ',
-            offset: i
-          };
-        }
-
-        return null;
+  The data structure for documents. @nonabstract
+  */
+  let Text$1 = class Text {
+      /**
+      Get the line description around the given position.
+      */
+      lineAt(pos) {
+          if (pos < 0 || pos > this.length)
+              throw new RangeError(`Invalid position ${pos} in document of length ${this.length}`);
+          return this.lineInner(pos, false, 1, 0);
       }
-    }
-  }
-
-  /**
-   * Parse a name from the input and return the first match, if any.
-   *
-   * @param { import('@lezer/lr').InputStream } input
-   * @param { Variables } variables
-   *
-   * @return { { token: string, offset: number, term: number } | null }
-   */
-  function parseName(input, variables) {
-    const contextKeys = variables.contextKeys();
-
-    const start = variables.tokens;
-
-    for (let i = 0, tokens = [], nextMatch = null;;) {
-
-      const namePart = (start.length + tokens.length) > 0;
-      const maybeSpace = tokens.length > 0;
-
-      const match = (
-        parseIdentifier(input, i, namePart) ||
-        namePart && parseAdditionalSymbol(input, i) ||
-        maybeSpace && parseSpaces(input, i)
-      );
-
-      // match is required
-      if (!match) {
-        return nextMatch;
+      /**
+      Get the description for the given (1-based) line number.
+      */
+      line(n) {
+          if (n < 1 || n > this.lines)
+              throw new RangeError(`Invalid line number ${n} in ${this.lines}-line document`);
+          return this.lineInner(n, true, 1, 0);
       }
-
-      const {
-        token,
-        offset
-      } = match;
-
-      i += offset;
-
-      if (token === ' ') {
-        continue;
+      /**
+      Replace a range of the text with the given content.
+      */
+      replace(from, to, text) {
+          let parts = [];
+          this.decompose(0, from, parts, 2 /* Open.To */);
+          if (text.length)
+              text.decompose(0, text.length, parts, 1 /* Open.From */ | 2 /* Open.To */);
+          this.decompose(to, this.length, parts, 1 /* Open.From */);
+          return TextNode.from(parts, this.length - (to - from) + text.length);
       }
-
-      tokens = [ ...tokens, token ];
-
-      const name = [ ...start, ...tokens ].join(' ');
-
-      if (contextKeys.some(el => el === name)) {
-        const token = tokens[0];
-
-        nextMatch = {
-          token,
-          offset: token.length,
-          term: nameIdentifier
-        };
+      /**
+      Append another document to this one.
+      */
+      append(other) {
+          return this.replace(this.length, this.length, other);
       }
-
-      if (dateTimeIdentifiers.some(el => el === name)) {
-        const token = tokens[0];
-
-        // parse date time identifiers as normal
-        // identifiers to allow specialization to kick in
-        //
-        // cf. https://github.com/nikku/lezer-feel/issues/8
-        nextMatch = {
-          token,
-          offset: token.length,
-          term: identifier
-        };
+      /**
+      Retrieve the text between the given points.
+      */
+      slice(from, to = this.length) {
+          let parts = [];
+          this.decompose(from, to, parts, 0);
+          return TextNode.from(parts, to - from);
       }
-
-      if (
-        !contextKeys.some(el => el.startsWith(name)) &&
-        !dateTimeIdentifiers.some(el => el.startsWith(name))
-      ) {
-        return nextMatch;
+      /**
+      Test whether this text is equal to another instance.
+      */
+      eq(other) {
+          if (other == this)
+              return true;
+          if (other.length != this.length || other.lines != this.lines)
+              return false;
+          let start = this.scanIdentical(other, 1), end = this.length - this.scanIdentical(other, -1);
+          let a = new RawTextCursor(this), b = new RawTextCursor(other);
+          for (let skip = start, pos = start;;) {
+              a.next(skip);
+              b.next(skip);
+              skip = 0;
+              if (a.lineBreak != b.lineBreak || a.done != b.done || a.value != b.value)
+                  return false;
+              pos += a.value.length;
+              if (a.done || pos >= end)
+                  return true;
+          }
       }
-    }
-
-  }
-
-  const identifiersMap = {
-    [ identifier ]: 'identifier',
-    [ nameIdentifier ]: 'nameIdentifier'
-  };
-
-  const identifiers = new ExternalTokenizer((input, stack) => {
-
-    LOG_PARSE_DEBUG && console.log('%s: T <identifier | nameIdentifier>', input.pos);
-
-    const nameMatch = parseName(input, stack.context);
-
-    const start = stack.context.tokens;
-
-    const match = nameMatch || parseIdentifier(input, 0, start.length > 0);
-
-    if (match) {
-      input.advance(match.offset);
-      input.acceptToken(nameMatch ? nameMatch.term : identifier);
-
-      LOG_PARSE && console.log('%s: MATCH <%s> <%s>', input.pos, nameMatch ? identifiersMap[nameMatch.term] : 'identifier', match.token);
-    }
-  }, { contextual: true });
-
-
-  const propertyIdentifiers = new ExternalTokenizer((input, stack) => {
-
-    LOG_PARSE_DEBUG && console.log('%s: T <propertyIdentifier>', input.pos);
-
-    const start = stack.context.tokens;
-
-    const match = parseIdentifier(input, 0, start.length > 0);
-
-    if (match) {
-      input.advance(match.offset);
-      input.acceptToken(propertyIdentifier);
-
-      LOG_PARSE && console.log('%s: MATCH <propertyIdentifier> <%s>', input.pos, match.token);
-    }
-  });
-
-
-  const insertSemicolon = new ExternalTokenizer((input, stack) => {
-
-    LOG_PARSE_DEBUG && console.log('%s: T <insertSemi>', input.pos);
-
-    let offset;
-    let insert = false;
-
-    for (offset = 0;; offset++) {
-      const char = input.peek(offset);
-
-      if (spaceChars.includes(char)) {
-        continue;
+      /**
+      Iterate over the text. When `dir` is `-1`, iteration happens
+      from end to start. This will return lines and the breaks between
+      them as separate strings.
+      */
+      iter(dir = 1) { return new RawTextCursor(this, dir); }
+      /**
+      Iterate over a range of the text. When `from` > `to`, the
+      iterator will run in reverse.
+      */
+      iterRange(from, to = this.length) { return new PartialTextCursor(this, from, to); }
+      /**
+      Return a cursor that iterates over the given range of lines,
+      _without_ returning the line breaks between, and yielding empty
+      strings for empty lines.
+      
+      When `from` and `to` are given, they should be 1-based line numbers.
+      */
+      iterLines(from, to) {
+          let inner;
+          if (from == null) {
+              inner = this.iter();
+          }
+          else {
+              if (to == null)
+                  to = this.lines + 1;
+              let start = this.line(from).from;
+              inner = this.iterRange(start, Math.max(start, to == this.lines + 1 ? this.length : to <= 1 ? 0 : this.line(to - 1).to));
+          }
+          return new LineCursor(inner);
       }
-
-      if (newlineChars.includes(char)) {
-        insert = true;
+      /**
+      Return the document as a string, using newline characters to
+      separate lines.
+      */
+      toString() { return this.sliceString(0); }
+      /**
+      Convert the document to an array of lines (which can be
+      deserialized again via [`Text.of`](https://codemirror.net/6/docs/ref/#state.Text^of)).
+      */
+      toJSON() {
+          let lines = [];
+          this.flatten(lines);
+          return lines;
       }
-
-      break;
-    }
-
-    if (insert) {
-
-      const identifier = parseIdentifier(input, offset + 1);
-      const spaces = parseSpaces(input, offset + 1);
-
-      if (spaces || identifier && /^(then|else|return|satisfies)$/.test(identifier.token)) {
-        return;
+      /**
+      @internal
+      */
+      constructor() { }
+      /**
+      Create a `Text` instance for the given array of lines.
+      */
+      static of(text) {
+          if (text.length == 0)
+              throw new RangeError("A document must have at least one line");
+          if (text.length == 1 && !text[0])
+              return Text.empty;
+          return text.length <= 32 /* Tree.Branch */ ? new TextLeaf(text) : TextNode.from(TextLeaf.split(text, []));
       }
-
-      LOG_PARSE && console.log('%s: MATCH <insertSemi>', input.pos);
-      input.acceptToken(insertSemi);
-    }
-  });
-
-  const prefixedContextStarts = {
-    [ functionInvocationStart ]: 'FunctionInvocation',
-    [ filterExpressionStart ]: 'FilterExpression',
-    [ pathExpressionStart ]: 'PathExpression'
-  };
-
-  const contextStarts = {
-    [ contextStart ]: 'Context',
-    [ functionDefinitionStart ]: 'FunctionDefinition',
-    [ forExpressionStart ]: 'ForExpression',
-    [ listStart ]: 'List',
-    [ ifExpressionStart ]: 'IfExpression',
-    [ quantifiedExpressionStart ]: 'QuantifiedExpression'
-  };
-
-  const contextEnds = {
-    [ Context ]: 'Context',
-    [ FunctionDefinition ]: 'FunctionDefinition',
-    [ ForExpression ]: 'ForExpression',
-    [ List ]: 'List',
-    [ IfExpression ]: 'IfExpression',
-    [ QuantifiedExpression ]: 'QuantifiedExpression',
-    [ PathExpression ]: 'PathExpression',
-    [ FunctionInvocation ]: 'FunctionInvocation',
-    [ FilterExpression ]: 'FilterExpression',
-    [ ArithmeticExpression ]: 'ArithmeticExpression'
-  };
-
-  class ValueProducer {
-
-    /**
-     * @param { Function } fn
-     */
-    constructor(fn) {
-      this.fn = fn;
-    }
-
-    get(variables) {
-      return this.fn(variables);
-    }
-
-    /**
-     * @param { Function }
-     *
-     * @return { ValueProducer }
-     */
-    static of(fn) {
-      return new ValueProducer(fn);
-    }
-
-  }
-
-  const dateTimeLiterals = {
-    'date and time': 1,
-    'date': 1,
-    'time': 1,
-    'duration': 1
   };
-
-  const dateTimeIdentifiers = Object.keys(dateTimeLiterals);
-
-  class Variables {
-
-    constructor({
-      name = 'Expressions',
-      tokens = [],
-      children = [],
-      parent = null,
-      context = { },
-      value,
-      raw
-    } = {}) {
-      this.name = name;
-      this.tokens = tokens;
-      this.children = children;
-      this.parent = parent;
-      this.context = context;
-      this.value = value;
-      this.raw = raw;
-    }
-
-    enterScope(name) {
-
-      const childScope = this.of({
-        name,
-        parent: this
-      });
-
-      LOG_VARS && console.log('[%s] enter', childScope.path, childScope.context);
-
-      return childScope;
-    }
-
-    exitScope(str) {
-
-      if (!this.parent) {
-        LOG_VARS && console.log('[%s] NO exit %o\n%s', this.path, this.context, indent(str, '  '));
-
-        return this;
-      }
-
-      LOG_VARS && console.log('[%s] exit %o\n%s', this.path, this.context, indent(str, '  '));
-
-      return this.parent.pushChild(this);
-    }
-
-    token(part) {
-
-      LOG_VARS && console.log('[%s] token <%s> + <%s>', this.path, this.tokens.join(' '), part);
-
-      return this.assign({
-        tokens: [ ...this.tokens, part ]
-      });
-    }
-
-    literal(value) {
-
-      LOG_VARS && console.log('[%s] literal %o', this.path, value);
-
-      return this.pushChild(this.of({
-        name: 'Literal',
-        value
-      }));
-    }
-
-    /**
-     * Return computed scope value
-     *
-     * @return {any}
-     */
-    computedValue() {
-      for (let scope = this;;scope = last(scope.children)) {
-
-        if (!scope) {
-          return null;
-        }
-
-        if (scope.value) {
-          return scope.value;
-        }
+  // Leaves store an array of line strings. There are always line breaks
+  // between these strings. Leaves are limited in size and have to be
+  // contained in TextNode instances for bigger documents.
+  class TextLeaf extends Text$1 {
+      constructor(text, length = textLength(text)) {
+          super();
+          this.text = text;
+          this.length = length;
       }
-    }
-
-    contextKeys() {
-      return Object.keys(this.context).map(normalizeContextKey);
-    }
-
-    get path() {
-      return this.parent?.path?.concat(' > ', this.name) || this.name;
-    }
-
-    /**
-     * Return value of variable.
-     *
-     * @param { string } variable
-     * @return { any } value
-     */
-    get(variable) {
-
-      const names = [ variable, variable && normalizeContextKey(variable) ];
-
-      const contextKey = Object.keys(this.context).find(
-        key => names.includes(normalizeContextKey(key))
-      );
-
-      if (typeof contextKey === 'undefined') {
-        return undefined;
+      get lines() { return this.text.length; }
+      get children() { return null; }
+      lineInner(target, isLine, line, offset) {
+          for (let i = 0;; i++) {
+              let string = this.text[i], end = offset + string.length;
+              if ((isLine ? line : end) >= target)
+                  return new Line$1(offset, end, line, string);
+              offset = end + 1;
+              line++;
+          }
       }
-
-      const val = this.context[contextKey];
-
-      if (val instanceof ValueProducer) {
-        return val.get(this);
-      } else {
-        return val;
+      decompose(from, to, target, open) {
+          let text = from <= 0 && to >= this.length ? this
+              : new TextLeaf(sliceText(this.text, from, to), Math.min(to, this.length) - Math.max(0, from));
+          if (open & 1 /* Open.From */) {
+              let prev = target.pop();
+              let joined = appendText(text.text, prev.text.slice(), 0, text.length);
+              if (joined.length <= 32 /* Tree.Branch */) {
+                  target.push(new TextLeaf(joined, prev.length + text.length));
+              }
+              else {
+                  let mid = joined.length >> 1;
+                  target.push(new TextLeaf(joined.slice(0, mid)), new TextLeaf(joined.slice(mid)));
+              }
+          }
+          else {
+              target.push(text);
+          }
       }
-    }
-
-    resolveName() {
-
-      const variable = this.tokens.join(' ');
-      const tokens = [];
-
-      const parentScope = this.assign({
-        tokens
-      });
-
-      const variableScope = this.of({
-        name: 'VariableName',
-        parent: parentScope,
-        value: this.get(variable),
-        raw: variable
-      });
-
-      LOG_VARS && console.log('[%s] resolve name <%s=%s>', variableScope.path, variable, this.get(variable));
-
-      return parentScope.pushChild(variableScope);
-    }
-
-    pushChild(child) {
-
-      if (!child) {
-        return this;
+      replace(from, to, text) {
+          if (!(text instanceof TextLeaf))
+              return super.replace(from, to, text);
+          let lines = appendText(this.text, appendText(text.text, sliceText(this.text, 0, from)), to);
+          let newLen = this.length + text.length - (to - from);
+          if (lines.length <= 32 /* Tree.Branch */)
+              return new TextLeaf(lines, newLen);
+          return TextNode.from(TextLeaf.split(lines, []), newLen);
       }
-
-      const parent = this.assign({
-        children: [ ...this.children, child ]
-      });
-
-      child.parent = parent;
-
-      return parent;
-    }
-
-    pushChildren(children) {
-
-      let parent = this;
-
-      for (const child of children) {
-        parent = parent.pushChild(child);
+      sliceString(from, to = this.length, lineSep = "\n") {
+          let result = "";
+          for (let pos = 0, i = 0; pos <= to && i < this.text.length; i++) {
+              let line = this.text[i], end = pos + line.length;
+              if (pos > from && i)
+                  result += lineSep;
+              if (from < end && to > pos)
+                  result += line.slice(Math.max(0, from - pos), to - pos);
+              pos = end + 1;
+          }
+          return result;
       }
-
-      return parent;
-    }
-
-    declareName() {
-
-      if (this.tokens.length === 0) {
-        throw Error('no tokens to declare name');
+      flatten(target) {
+          for (let line of this.text)
+              target.push(line);
       }
-
-      const variableName = this.tokens.join(' ');
-
-      LOG_VARS && console.log('[%s] declareName <%s>', this.path, variableName);
-
-      return this.assign({
-        tokens: []
-      }).pushChild(
-        this.of({
-          name: 'Name',
-          value: variableName
-        })
-      );
-    }
-
-    define(name, value) {
-
-      if (typeof name !== 'string') {
-        LOG_VARS && console.log('[%s] no define <%s=%s>', this.path, name, value);
-
-        return this;
+      scanIdentical() { return 0; }
+      static split(text, target) {
+          let part = [], len = -1;
+          for (let line of text) {
+              part.push(line);
+              len += line.length + 1;
+              if (part.length == 32 /* Tree.Branch */) {
+                  target.push(new TextLeaf(part, len));
+                  part = [];
+                  len = -1;
+              }
+          }
+          if (len > -1)
+              target.push(new TextLeaf(part, len));
+          return target;
       }
-
-      LOG_VARS && console.log('[%s] define <%s=%s>', this.path, name, value);
-
-      const context = {
-        ...this.context,
-        [name]: value
-      };
-
-      return this.assign({
-        context
-      });
-    }
-
-    /**
-     * @param { Record<string, any> } [options]
-     *
-     * @return { Variables }
-     */
-    assign(options = {}) {
-
-      return Variables.of({
-        ...this,
-        ...options
-      });
-    }
-
-    /**
-     * @param { Record<string, any> } [options]
-     *
-     * @return { Variables }
-     */
-    of(options = {}) {
-
-      const defaultOptions = {
-        context: this.context,
-        parent: this.parent
-      };
-
-      return Variables.of({
-        ...defaultOptions,
-        ...options
-      });
-    }
-
-    static of(options) {
-      const {
-        name,
-        tokens = [],
-        children = [],
-        parent = null,
-        context = {},
-        value,
-        raw
-      } = options;
-
-      return new Variables({
-        name,
-        tokens: [ ...tokens ],
-        children: [ ...children ],
-        context: {
-          ...context
-        },
-        parent,
-        value,
-        raw
-      });
-    }
-
-  }
-
-  /**
-   * @param { string } name
-   *
-   * @return { string } normalizedName
-   */
-  function normalizeContextKey(name) {
-    return name.replace(/\s*([./\-'+*])\s*/g, ' $1 ').replace(/\s{2,}/g, ' ').trim();
   }
-
-  /**
-   * Wrap children of variables under the given named child.
-   *
-   * @param { Variables } variables
-   * @param { string } name
-   * @param { string } code
-   * @return { Variables }
-   */
-  function wrap(variables, scopeName, code) {
-
-    const parts = variables.children.filter(c => c.name !== scopeName);
-    const children = variables.children.filter(c => c.name === scopeName);
-
-    const namePart = parts[0];
-    const valuePart = parts[Math.max(1, parts.length - 1)];
-
-    const name = namePart.computedValue();
-    const value = valuePart?.computedValue() || null;
-
-    return variables
-      .assign({
-        children
-      })
-      .enterScope(scopeName)
-      .pushChildren(parts)
-      .exitScope(code)
-      .define(name, value);
-  }
-
-  /**
-   * @param { any } context
-   *
-   * @return { ContextTracker<Variables> }
-   */
-  function trackVariables(context = {}) {
-
-    const start = Variables.of({
-      context
-    });
-
-    return new ContextTracker({
-      start,
-      reduce(variables, term, stack, input) {
-
-        if (term === IfExpression) {
-          const [ thenPart, elsePart ] = variables.children.slice(-2);
-
-          variables = variables.assign({
-            value: {
-              ...thenPart?.computedValue(),
-              ...elsePart?.computedValue()
-            }
-          });
-        }
-
-        if (term === List) {
-          variables = variables.assign({
-            value: variables.children.reduce((value, child) => {
-              return {
-                ...value,
-                ...child?.computedValue()
-              };
-            }, {})
-          });
-        }
-
-        if (term === FilterExpression) {
-          const [ sourcePart, _ ] = variables.children.slice(-2);
-
-          variables = variables.assign({
-            value: sourcePart?.computedValue()
-          });
-        }
-
-        if (term === FunctionInvocation) {
-
-          const [
-            name,
-            ...args
-          ] = variables.children;
-
-          // preserve type information through `get value(context, key)` utility
-          if (name?.raw === 'get value') {
-            variables = getContextValue(variables, args);
-          }
-        }
-
-        const start = contextStarts[term];
-
-        if (start) {
-          return variables.enterScope(start);
-        }
-
-        const prefixedStart = prefixedContextStarts[term];
-
-        // pull <expression> into new <prefixedStart> context
-        if (prefixedStart) {
-
-          const {
-            children: currentChildren,
-            context: currentContext,
-          } = variables;
-
-          const children = currentChildren.slice(0, -1);
-          const lastChild = last(currentChildren);
-
-          let newContext = null;
-
-          if (term === pathExpressionStart) {
-            newContext = lastChild?.computedValue();
-          }
-
-          if (term === filterExpressionStart) {
-            newContext = {
-              ...currentContext,
-              ...lastChild?.computedValue(),
-              item: lastChild?.computedValue()
-            };
+  // Nodes provide the tree structure of the `Text` type. They store a
+  // number of other nodes or leaves, taking care to balance themselves
+  // on changes. There are implied line breaks _between_ the children of
+  // a node (but not before the first or after the last child).
+  class TextNode extends Text$1 {
+      constructor(children, length) {
+          super();
+          this.children = children;
+          this.length = length;
+          this.lines = 0;
+          for (let child of children)
+              this.lines += child.lines;
+      }
+      lineInner(target, isLine, line, offset) {
+          for (let i = 0;; i++) {
+              let child = this.children[i], end = offset + child.length, endLine = line + child.lines - 1;
+              if ((isLine ? endLine : end) >= target)
+                  return child.lineInner(target, isLine, line, offset);
+              offset = end + 1;
+              line = endLine + 1;
           }
-
-          return variables.assign({
-            children
-          }).enterScope(prefixedStart).pushChild(lastChild).assign({
-            context: newContext || currentContext
-          });
-        }
-
-        const code = input.read(input.pos, stack.pos);
-
-        const end = contextEnds[term];
-
-        if (end) {
-          return variables.exitScope(code);
-        }
-
-        if (term === ContextEntry) {
-          const parts = variables.children.filter(c => c.name !== 'ContextEntry');
-
-          const name = parts[0];
-          const value = last(parts);
-
-          return wrap(variables, 'ContextEntry', code).assign(
-            {
-              value: {
-                ...variables.value,
-                [name.computedValue()] : value?.computedValue()
+      }
+      decompose(from, to, target, open) {
+          for (let i = 0, pos = 0; pos <= to && i < this.children.length; i++) {
+              let child = this.children[i], end = pos + child.length;
+              if (from <= end && to >= pos) {
+                  let childOpen = open & ((pos <= from ? 1 /* Open.From */ : 0) | (end >= to ? 2 /* Open.To */ : 0));
+                  if (pos >= from && end <= to && !childOpen)
+                      target.push(child);
+                  else
+                      child.decompose(from - pos, to - pos, target, childOpen);
               }
-            }
-          );
-        }
-
-        if (
-          term === ForInExpression ||
-          term === QuantifiedInExpression
-        ) {
-          return wrap(variables, 'InExpression', code);
-        }
-
-        // define <partial> within ForExpression body
-        if (term === forExpressionBodyStart) {
-
-          return variables.define(
-            'partial',
-            ValueProducer.of(variables => {
-              return last(variables.children)?.computedValue();
-            })
-          );
-        }
-
-        if (
-          term === ParameterName
-        ) {
-          const name = last(variables.children).computedValue();
-
-          // TODO: attach type information
-          return variables.define(name, 1);
-        }
-
-        // pull <expression> into ArithmeticExpression child
-        if (
-          term === arithmeticPlusStart ||
-          term === arithmeticTimesStart ||
-          term === arithmeticExpStart
-        ) {
-          const children = variables.children.slice(0, -1);
-          const lastChild = last(variables.children);
-
-          return variables.assign({
-            children
-          }).enterScope('ArithmeticExpression').pushChild(lastChild);
-        }
-
-        if (term === arithmeticUnaryStart) {
-          return variables.enterScope('ArithmeticExpression');
-        }
-
-        if (
-          term === Identifier ||
-          term === AdditionalIdentifier ||
-          term === PropertyIdentifier
-        ) {
-          return variables.token(code);
-        }
-
-        if (
-          term === StringLiteral
-        ) {
-          return variables.literal(code.replace(/^"|"$/g, ''));
-        }
-
-        if (term === BooleanLiteral) {
-          return variables.literal(code === 'true' ? true : false);
-        }
-
-        if (term === NumericLiteral) {
-          return variables.literal(parseFloat(code));
-        }
-
-        if (term === nil) {
-          return variables.literal(null);
-        }
-
-        if (
-          term === VariableName
-        ) {
-          return variables.resolveName();
-        }
-
-        if (
-          term === Name ||
-          term === PropertyName
-        ) {
-          return variables.declareName();
-        }
-
-        if (
-          term === expression0 ||
-          term === PositiveUnaryTest
-        ) {
-          if (variables.tokens.length > 0) {
-            throw new Error('uncleared name');
-          }
-        }
-
-        if (term === expression0) {
-
-          let parent = variables;
-
-          while (parent.parent) {
-            parent = parent.exitScope(code);
+              pos = end + 1;
           }
-
-          return parent;
-        }
-
-        return variables;
-      }
-    });
-  }
-
-  const variableTracker = trackVariables({});
-
-
-  // helpers //////////////
-
-  function getContextValue(variables, args) {
-
-    if (!args.length) {
-      return variables.assign({
-        value: null
-      });
-    }
-
-    if (args[0].name === 'Name') {
-      args = extractNamedArgs(args, [ 'm', 'key' ]);
-    }
-
-    if (args.length !== 2) {
-      return variables.assign({
-        value: null
-      });
-    }
-
-    const [
-      context,
-      key
-    ] = args;
-
-    const keyValue = key?.computedValue();
-    const contextValue = context?.computedValue();
-
-    if (
-      (!contextValue || typeof contextValue !== 'object') || typeof keyValue !== 'string'
-    ) {
-      return variables.assign({
-        value: null
-      });
-    }
-
-    return variables.assign({
-      value: [ normalizeContextKey(keyValue), keyValue ].reduce((value, keyValue) => {
-        if (keyValue in contextValue) {
-          return contextValue[keyValue];
-        }
-
-        return value;
-      }, null)
-    });
-  }
-
-  function extractNamedArgs(args, argNames) {
-
-    const context = {};
-
-    for (let i = 0; i < args.length; i += 2) {
-      const [ name, value ] = args.slice(i, i + 2);
-
-      context[name.value] = value;
-    }
-
-    return argNames.map(name => context[name]);
-  }
-
-  function last(arr) {
-    return arr[arr.length - 1];
-  }
-
-  const feelHighlighting = styleTags({
-    StringLiteral: tags.string,
-    NumericLiteral: tags.number,
-    BooleanLiteral: tags.bool,
-    'AtLiteral!': tags.special(tags.string),
-    CompareOp: tags.compareOperator,
-    ArithOp: tags.arithmeticOperator,
-    'for if then else some every satisfies between return': tags.controlKeyword,
-    'in instance of and or': tags.operatorKeyword,
-    function: tags.definitionKeyword,
-    as: tags.keyword,
-    'Type/...': tags.typeName,
-    Wildcard: tags.special,
-    null: tags.null,
-    LineComment: tags.lineComment,
-    BlockComment: tags.blockComment,
-    'VariableName! "?"': tags.variableName,
-    'DateTimeConstructor! SpecialFunctionName!': tags.function(tags.special(tags.variableName)),
-    'List Interval': tags.list,
-    Context: tags.definition(tags.literal),
-    'Name!': tags.definition(tags.variableName),
-    'Key/Name! ContextEntryType/Name!': tags.definition(tags.propertyName),
-    'PathExpression/VariableName!': tags.function(tags.propertyName),
-    'FormalParameter/ParameterName!': tags.function(tags.definition(tags.variableName)),
-    '( )': tags.paren,
-    '[ ]': tags.squareBracket,
-    '{ }': tags.brace,
-    '.': tags.derefOperator,
-    ', ;': tags.separator,
-    '..': tags.punctuation
-  });
-
-  // This file was generated by lezer-generator. You probably shouldn't edit it.
-  const spec_identifier = {__proto__:null,for:10, in:30, return:34, if:38, then:40, else:42, some:46, every:48, satisfies:55, or:58, and:62, between:70, instance:86, of:89, days:99, time:101, duration:103, years:105, months:107, date:109, list:115, context:121, function:128, null:154, true:324, false:324, "?":168, external:184, not:207};
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-    nodeNames: "⚠ LineComment BlockComment Expressions ForExpression for InExpressions InExpression Name Identifier Identifier ArithOp ArithOp ArithOp ArithOp in IterationContext return IfExpression if then else QuantifiedExpression some every InExpressions InExpression satisfies Disjunction or Conjunction and Comparison CompareOp CompareOp between PositiveUnaryTest ( PositiveUnaryTests ) ArithmeticExpression ArithOp InstanceOfExpression instance of Type QualifiedName VariableName SpecialType days time duration years months date > ListType list < ContextType context ContextEntryTypes ContextEntryType FunctionType function ArgumentTypes ArgumentType PathExpression ] FilterExpression [ FunctionInvocation SpecialFunctionName NamedParameters NamedParameter ParameterName PositionalParameters null NumericLiteral StringLiteral BooleanLiteral DateTimeLiteral DateTimeConstructor AtLiteral ? SimplePositiveUnaryTest Interval ParenthesizedExpression List FunctionDefinition FormalParameters FormalParameter external FunctionBody } { Context ContextEntry Key Name Identifier UnaryTests Wildcard not",
-    maxTerm: 175,
-    context: variableTracker,
-    nodeProps: [
-      ["group", -17,4,18,22,28,30,32,40,42,67,69,71,84,85,87,88,89,96,"Expression",47,"Expression Expression",-5,77,78,79,80,81,"Expression Literal"],
-      ["closedBy", 37,")",70,"]",95,"}"],
-      ["openedBy", 39,"(",68,"[",94,"{"]
-    ],
-    propSources: [feelHighlighting],
-    skippedNodes: [0,1,2],
-    repeatNodeCount: 14,
-    tokenData: "+l~RuXY#fYZ$ZZ[#f]^$Zpq#fqr$`rs$kwx&cxy&hyz&mz{&r{|'P|}'U}!O'Z!O!P'h!P!Q(Q!Q![){![!]*^!]!^*c!^!_*h!_!`$f!`!a*w!b!c+R!}#O+W#P#Q+]#Q#R&z#o#p+b#q#r+g$f$g#f#BY#BZ#f$IS$I_#f$I|$I}$Z$I}$JO$Z$JT$JU#f$KV$KW#f&FU&FV#f?HT?HU#f~#kY#p~XY#fZ[#fpq#f$f$g#f#BY#BZ#f$IS$I_#f$JT$JU#f$KV$KW#f&FU&FV#f?HT?HU#f~$`O#q~~$cP!_!`$f~$kOq~~$pW$g~OY$kZr$krs%Ys#O$k#O#P%_#P;'S$k;'S;=`&]<%lO$k~%_O$g~~%bRO;'S$k;'S;=`%k;=`O$k~%pX$g~OY$kZr$krs%Ys#O$k#O#P%_#P;'S$k;'S;=`&];=`<%l$k<%lO$k~&`P;=`<%l$k~&hO#y~~&mOu~~&rOw~~&wP^~z{&z~'POy~~'UO[~~'ZO#|~R'`PZP!`!a'cQ'hO$[Q~'mQ#x~!O!P's!Q!['x~'xO#{~~'}P$f~!Q!['x~(VQ]~z{(]!P!Q)d~(`TOz(]z{(o{;'S(];'S;=`)^<%lO(]~(rVOz(]z{(o{!P(]!P!Q)X!Q;'S(];'S;=`)^<%lO(]~)^OQ~~)aP;=`<%l(]~)iSP~OY)dZ;'S)d;'S;=`)u<%lO)d~)xP;=`<%l)d~*QQ$f~!O!P*W!Q![){~*ZP!Q!['x~*cO$Y~~*hO$u~R*oP![QrP!_!`*rP*wOrPR+OP!XQrP!_!`*r~+WO$i~~+]O!h~~+bO!f~~+gO#R~~+lO#Q~",
-    tokenizers: [propertyIdentifiers, identifiers, insertSemicolon, 0, 1],
-    topRules: {"Expressions":[0,3],"UnaryTests":[1,101]},
-    dynamicPrecedences: {"30":-1,"71":-1,"73":-1,"126":-1},
-    specialized: [{term: 120, get: value => spec_identifier[value] || -1}],
-    tokenPrec: 0
-  });
-
-  function isContext(e) {
-      return Object.getPrototypeOf(e) === Object.prototype;
-  }
-  function isDateTime(obj) {
-      return DateTime.isDateTime(obj);
-  }
-  function isDuration(obj) {
-      return Duration.isDuration(obj);
-  }
-  function isArray$1(e) {
-      return Array.isArray(e);
-  }
-  function isBoolean(e) {
-      return typeof e === 'boolean';
-  }
-  function getType(e) {
-      if (e === null || e === undefined) {
-          return 'nil';
-      }
-      if (isBoolean(e)) {
-          return 'boolean';
-      }
-      if (isNumber(e)) {
-          return 'number';
       }
-      if (isString(e)) {
-          return 'string';
+      replace(from, to, text) {
+          if (text.lines < this.lines)
+              for (let i = 0, pos = 0; i < this.children.length; i++) {
+                  let child = this.children[i], end = pos + child.length;
+                  // Fast path: if the change only affects one child and the
+                  // child's size remains in the acceptable range, only update
+                  // that child
+                  if (from >= pos && to <= end) {
+                      let updated = child.replace(from - pos, to - pos, text);
+                      let totalLines = this.lines - child.lines + updated.lines;
+                      if (updated.lines < (totalLines >> (5 /* Tree.BranchShift */ - 1)) &&
+                          updated.lines > (totalLines >> (5 /* Tree.BranchShift */ + 1))) {
+                          let copy = this.children.slice();
+                          copy[i] = updated;
+                          return new TextNode(copy, this.length - (to - from) + text.length);
+                      }
+                      return super.replace(pos, end, updated);
+                  }
+                  pos = end + 1;
+              }
+          return super.replace(from, to, text);
       }
-      if (isContext(e)) {
-          return 'context';
+      sliceString(from, to = this.length, lineSep = "\n") {
+          let result = "";
+          for (let i = 0, pos = 0; i < this.children.length && pos <= to; i++) {
+              let child = this.children[i], end = pos + child.length;
+              if (pos > from && i)
+                  result += lineSep;
+              if (from < end && to > pos)
+                  result += child.sliceString(from - pos, to - pos, lineSep);
+              pos = end + 1;
+          }
+          return result;
       }
-      if (isArray$1(e)) {
-          return 'list';
+      flatten(target) {
+          for (let child of this.children)
+              child.flatten(target);
       }
-      if (isDuration(e)) {
-          return 'duration';
+      scanIdentical(other, dir) {
+          if (!(other instanceof TextNode))
+              return 0;
+          let length = 0;
+          let [iA, iB, eA, eB] = dir > 0 ? [0, 0, this.children.length, other.children.length]
+              : [this.children.length - 1, other.children.length - 1, -1, -1];
+          for (;; iA += dir, iB += dir) {
+              if (iA == eA || iB == eB)
+                  return length;
+              let chA = this.children[iA], chB = other.children[iB];
+              if (chA != chB)
+                  return length + chA.scanIdentical(chB, dir);
+              length += chA.length + 1;
+          }
       }
-      if (isDateTime(e)) {
-          if (e.year === 1900 &&
-              e.month === 1 &&
-              e.day === 1) {
-              return 'time';
+      static from(children, length = children.reduce((l, ch) => l + ch.length + 1, -1)) {
+          let lines = 0;
+          for (let ch of children)
+              lines += ch.lines;
+          if (lines < 32 /* Tree.Branch */) {
+              let flat = [];
+              for (let ch of children)
+                  ch.flatten(flat);
+              return new TextLeaf(flat, length);
           }
-          if (e.hour === 0 &&
-              e.minute === 0 &&
-              e.second === 0 &&
-              e.millisecond === 0 &&
-              e.zone === FixedOffsetZone.utcInstance) {
-              return 'date';
+          let chunk = Math.max(32 /* Tree.Branch */, lines >> 5 /* Tree.BranchShift */), maxChunk = chunk << 1, minChunk = chunk >> 1;
+          let chunked = [], currentLines = 0, currentLen = -1, currentChunk = [];
+          function add(child) {
+              let last;
+              if (child.lines > maxChunk && child instanceof TextNode) {
+                  for (let node of child.children)
+                      add(node);
+              }
+              else if (child.lines > minChunk && (currentLines > minChunk || !currentLines)) {
+                  flush();
+                  chunked.push(child);
+              }
+              else if (child instanceof TextLeaf && currentLines &&
+                  (last = currentChunk[currentChunk.length - 1]) instanceof TextLeaf &&
+                  child.lines + last.lines <= 32 /* Tree.Branch */) {
+                  currentLines += child.lines;
+                  currentLen += child.length + 1;
+                  currentChunk[currentChunk.length - 1] = new TextLeaf(last.text.concat(child.text), last.length + 1 + child.length);
+              }
+              else {
+                  if (currentLines + child.lines > chunk)
+                      flush();
+                  currentLines += child.lines;
+                  currentLen += child.length + 1;
+                  currentChunk.push(child);
+              }
           }
-          return 'date time';
-      }
-      if (e instanceof Range$1) {
-          return 'range';
-      }
-      if (e instanceof FunctionWrapper) {
-          return 'function';
+          function flush() {
+              if (currentLines == 0)
+                  return;
+              chunked.push(currentChunk.length == 1 ? currentChunk[0] : TextNode.from(currentChunk, currentLen));
+              currentLen = -1;
+              currentLines = currentChunk.length = 0;
+          }
+          for (let child of children)
+              add(child);
+          flush();
+          return chunked.length == 1 ? chunked[0] : new TextNode(chunked, length);
       }
-      return 'literal';
   }
-  function isType(el, type) {
-      return getType(el) === type;
+  Text$1.empty = /*@__PURE__*/new TextLeaf([""], 0);
+  function textLength(text) {
+      let length = -1;
+      for (let line of text)
+          length += line.length + 1;
+      return length;
   }
-  function typeCast(obj, type) {
-      if (isDateTime(obj)) {
-          if (type === 'time') {
-              return obj.set({
-                  year: 1900,
-                  month: 1,
-                  day: 1
-              });
-          }
-          if (type === 'date') {
-              return obj.setZone('utc', { keepLocalTime: true }).startOf('day');
-          }
-          if (type === 'date time') {
-              return obj;
+  function appendText(text, target, from = 0, to = 1e9) {
+      for (let pos = 0, i = 0, first = true; i < text.length && pos <= to; i++) {
+          let line = text[i], end = pos + line.length;
+          if (end >= from) {
+              if (end > to)
+                  line = line.slice(0, to - pos);
+              if (pos < from)
+                  line = line.slice(from - pos);
+              if (first) {
+                  target[target.length - 1] += line;
+                  first = false;
+              }
+              else
+                  target.push(line);
           }
+          pos = end + 1;
       }
-      return null;
-  }
-  let Range$1 = class Range {
-      constructor(props) {
-          Object.assign(this, props);
-      }
-  };
-  function isNumber(obj) {
-      return typeof obj === 'number';
+      return target;
   }
-  function isString(obj) {
-      return typeof obj === 'string';
+  function sliceText(text, from, to) {
+      return appendText(text, [""], from, to);
   }
-  function equals(a, b) {
-      if (a === null && b !== null ||
-          a !== null && b === null) {
-          return false;
-      }
-      if (isArray$1(a) && a.length < 2) {
-          a = a[0];
-      }
-      if (isArray$1(b) && b.length < 2) {
-          b = b[0];
-      }
-      const aType = getType(a);
-      const bType = getType(b);
-      if (aType !== bType) {
-          return null;
-      }
-      if (aType === 'nil') {
-          return true;
+  class RawTextCursor {
+      constructor(text, dir = 1) {
+          this.dir = dir;
+          this.done = false;
+          this.lineBreak = false;
+          this.value = "";
+          this.nodes = [text];
+          this.offsets = [dir > 0 ? 1 : (text instanceof TextLeaf ? text.text.length : text.children.length) << 1];
       }
-      if (aType === 'list') {
-          if (a.length !== b.length) {
-              return false;
+      nextInner(skip, dir) {
+          this.done = this.lineBreak = false;
+          for (;;) {
+              let last = this.nodes.length - 1;
+              let top = this.nodes[last], offsetValue = this.offsets[last], offset = offsetValue >> 1;
+              let size = top instanceof TextLeaf ? top.text.length : top.children.length;
+              if (offset == (dir > 0 ? size : 0)) {
+                  if (last == 0) {
+                      this.done = true;
+                      this.value = "";
+                      return this;
+                  }
+                  if (dir > 0)
+                      this.offsets[last - 1]++;
+                  this.nodes.pop();
+                  this.offsets.pop();
+              }
+              else if ((offsetValue & 1) == (dir > 0 ? 0 : 1)) {
+                  this.offsets[last] += dir;
+                  if (skip == 0) {
+                      this.lineBreak = true;
+                      this.value = "\n";
+                      return this;
+                  }
+                  skip--;
+              }
+              else if (top instanceof TextLeaf) {
+                  // Move to the next string
+                  let next = top.text[offset + (dir < 0 ? -1 : 0)];
+                  this.offsets[last] += dir;
+                  if (next.length > Math.max(0, skip)) {
+                      this.value = skip == 0 ? next : dir > 0 ? next.slice(skip) : next.slice(0, next.length - skip);
+                      return this;
+                  }
+                  skip -= next.length;
+              }
+              else {
+                  let next = top.children[offset + (dir < 0 ? -1 : 0)];
+                  if (skip > next.length) {
+                      skip -= next.length;
+                      this.offsets[last] += dir;
+                  }
+                  else {
+                      if (dir < 0)
+                          this.offsets[last]--;
+                      this.nodes.push(next);
+                      this.offsets.push(dir > 0 ? 1 : (next instanceof TextLeaf ? next.text.length : next.children.length) << 1);
+                  }
+              }
           }
-          return a.every((element, idx) => equals(element, b[idx]));
-      }
-      if (aType === 'date time' || aType === 'time' || aType === 'date') {
-          return (a.toUTC().valueOf() === b.toUTC().valueOf());
       }
-      if (aType === 'duration') {
-          // years and months duration -> months
-          if (Math.abs(a.as('days')) > 180) {
-              return Math.trunc(a.minus(b).as('months')) === 0;
-          }
-          // days and time duration -> seconds
-          else {
-              return Math.trunc(a.minus(b).as('seconds')) === 0;
+      next(skip = 0) {
+          if (skip < 0) {
+              this.nextInner(-skip, (-this.dir));
+              skip = this.value.length;
           }
+          return this.nextInner(skip, this.dir);
       }
-      if (aType === 'context') {
-          const aEntries = Object.entries(a);
-          const bEntries = Object.entries(b);
-          if (aEntries.length !== bEntries.length) {
-              return false;
-          }
-          return aEntries.every(([key, value]) => key in b && equals(value, b[key]));
+  }
+  class PartialTextCursor {
+      constructor(text, start, end) {
+          this.value = "";
+          this.done = false;
+          this.cursor = new RawTextCursor(text, start > end ? -1 : 1);
+          this.pos = start > end ? text.length : 0;
+          this.from = Math.min(start, end);
+          this.to = Math.max(start, end);
       }
-      if (aType === 'range') {
-          return [
-              [a.start, b.start],
-              [a.end, b.end],
-              [a['start included'], b['start included']],
-              [a['end included'], b['end included']]
-          ].every(([a, b]) => a === b);
+      nextInner(skip, dir) {
+          if (dir < 0 ? this.pos <= this.from : this.pos >= this.to) {
+              this.value = "";
+              this.done = true;
+              return this;
+          }
+          skip += Math.max(0, dir < 0 ? this.pos - this.to : this.from - this.pos);
+          let limit = dir < 0 ? this.pos - this.from : this.to - this.pos;
+          if (skip > limit)
+              skip = limit;
+          limit -= skip;
+          let { value } = this.cursor.next(skip);
+          this.pos += (value.length + skip) * dir;
+          this.value = value.length <= limit ? value : dir < 0 ? value.slice(value.length - limit) : value.slice(0, limit);
+          this.done = !this.value;
+          return this;
       }
-      if (a == b) {
-          return true;
+      next(skip = 0) {
+          if (skip < 0)
+              skip = Math.max(skip, this.from - this.pos);
+          else if (skip > 0)
+              skip = Math.min(skip, this.to - this.pos);
+          return this.nextInner(skip, this.cursor.dir);
       }
-      return aType === bType ? false : null;
+      get lineBreak() { return this.cursor.lineBreak && this.value != ""; }
   }
-  class FunctionWrapper {
-      constructor(fn, parameterNames) {
-          this.fn = fn;
-          this.parameterNames = parameterNames;
+  class LineCursor {
+      constructor(inner) {
+          this.inner = inner;
+          this.afterBreak = true;
+          this.value = "";
+          this.done = false;
       }
-      invoke(contextOrArgs) {
-          let params;
-          if (isArray$1(contextOrArgs)) {
-              params = contextOrArgs;
+      next(skip = 0) {
+          let { done, lineBreak, value } = this.inner.next(skip);
+          if (done) {
+              this.done = true;
+              this.value = "";
+          }
+          else if (lineBreak) {
+              if (this.afterBreak) {
+                  this.value = "";
+              }
+              else {
+                  this.afterBreak = true;
+                  this.next();
+              }
           }
           else {
-              params = this.parameterNames.map(n => contextOrArgs[n]);
+              this.value = value;
+              this.afterBreak = false;
           }
-          return this.fn.call(null, ...params);
+          return this;
       }
+      get lineBreak() { return false; }
   }
-
-  function parseParameterNames(fn) {
-      if (Array.isArray(fn.$args)) {
-          return fn.$args;
-      }
-      const code = fn.toString();
-      const match = /^(?:[^(]*\s*)?\(([^)]+)?\)/.exec(code);
-      if (!match) {
-          throw new Error('failed to parse params: ' + code);
-      }
-      const [_, params] = match;
-      if (!params) {
-          return [];
+  if (typeof Symbol != "undefined") {
+      Text$1.prototype[Symbol.iterator] = function () { return this.iter(); };
+      RawTextCursor.prototype[Symbol.iterator] = PartialTextCursor.prototype[Symbol.iterator] =
+          LineCursor.prototype[Symbol.iterator] = function () { return this; };
+  }
+  /**
+  This type describes a line in the document. It is created
+  on-demand when lines are [queried](https://codemirror.net/6/docs/ref/#state.Text.lineAt).
+  */
+  let Line$1 = class Line {
+      /**
+      @internal
+      */
+      constructor(
+      /**
+      The position of the start of the line.
+      */
+      from, 
+      /**
+      The position at the end of the line (_before_ the line break,
+      or at the end of document for the last line).
+      */
+      to, 
+      /**
+      This line's line number (1-based).
+      */
+      number, 
+      /**
+      The line's content.
+      */
+      text) {
+          this.from = from;
+          this.to = to;
+          this.number = number;
+          this.text = text;
       }
-      return params.split(',').map(p => p.trim());
+      /**
+      The length of the line (not including any line break after it).
+      */
+      get length() { return this.to - this.from; }
+  };
+
+  // Compressed representation of the Grapheme_Cluster_Break=Extend
+  // information from
+  // http://www.unicode.org/Public/13.0.0/ucd/auxiliary/GraphemeBreakProperty.txt.
+  // Each pair of elements represents a range, as an offet from the
+  // previous range and a length. Numbers are in base-36, with the empty
+  // string being a shorthand for 1.
+  let extend = /*@__PURE__*/"lc,34,7n,7,7b,19,,,,2,,2,,,20,b,1c,l,g,,2t,7,2,6,2,2,,4,z,,u,r,2j,b,1m,9,9,,o,4,,9,,3,,5,17,3,3b,f,,w,1j,,,,4,8,4,,3,7,a,2,t,,1m,,,,2,4,8,,9,,a,2,q,,2,2,1l,,4,2,4,2,2,3,3,,u,2,3,,b,2,1l,,4,5,,2,4,,k,2,m,6,,,1m,,,2,,4,8,,7,3,a,2,u,,1n,,,,c,,9,,14,,3,,1l,3,5,3,,4,7,2,b,2,t,,1m,,2,,2,,3,,5,2,7,2,b,2,s,2,1l,2,,,2,4,8,,9,,a,2,t,,20,,4,,2,3,,,8,,29,,2,7,c,8,2q,,2,9,b,6,22,2,r,,,,,,1j,e,,5,,2,5,b,,10,9,,2u,4,,6,,2,2,2,p,2,4,3,g,4,d,,2,2,6,,f,,jj,3,qa,3,t,3,t,2,u,2,1s,2,,7,8,,2,b,9,,19,3,3b,2,y,,3a,3,4,2,9,,6,3,63,2,2,,1m,,,7,,,,,2,8,6,a,2,,1c,h,1r,4,1c,7,,,5,,14,9,c,2,w,4,2,2,,3,1k,,,2,3,,,3,1m,8,2,2,48,3,,d,,7,4,,6,,3,2,5i,1m,,5,ek,,5f,x,2da,3,3x,,2o,w,fe,6,2x,2,n9w,4,,a,w,2,28,2,7k,,3,,4,,p,2,5,,47,2,q,i,d,,12,8,p,b,1a,3,1c,,2,4,2,2,13,,1v,6,2,2,2,2,c,,8,,1b,,1f,,,3,2,2,5,2,,,16,2,8,,6m,,2,,4,,fn4,,kh,g,g,g,a6,2,gt,,6a,,45,5,1ae,3,,2,5,4,14,3,4,,4l,2,fx,4,ar,2,49,b,4w,,1i,f,1k,3,1d,4,2,2,1x,3,10,5,,8,1q,,c,2,1g,9,a,4,2,,2n,3,2,,,2,6,,4g,,3,8,l,2,1l,2,,,,,m,,e,7,3,5,5f,8,2,3,,,n,,29,,2,6,,,2,,,2,,2,6j,,2,4,6,2,,2,r,2,2d,8,2,,,2,2y,,,,2,6,,,2t,3,2,4,,5,77,9,,2,6t,,a,2,,,4,,40,4,2,2,4,,w,a,14,6,2,4,8,,9,6,2,3,1a,d,,2,ba,7,,6,,,2a,m,2,7,,2,,2,3e,6,3,,,2,,7,,,20,2,3,,,,9n,2,f0b,5,1n,7,t4,,1r,4,29,,f5k,2,43q,,,3,4,5,8,8,2,7,u,4,44,3,1iz,1j,4,1e,8,,e,,m,5,,f,11s,7,,h,2,7,,2,,5,79,7,c5,4,15s,7,31,7,240,5,gx7k,2o,3k,6o".split(",").map(s => s ? parseInt(s, 36) : 1);
+  // Convert offsets into absolute values
+  for (let i = 1; i < extend.length; i++)
+      extend[i] += extend[i - 1];
+  function isExtendingChar(code) {
+      for (let i = 1; i < extend.length; i += 2)
+          if (extend[i] > code)
+              return extend[i - 1] <= code;
+      return false;
   }
-  function notImplemented(thing) {
-      return new Error(`not implemented: ${thing}`);
+  function isRegionalIndicator(code) {
+      return code >= 0x1F1E6 && code <= 0x1F1FF;
   }
+  const ZWJ = 0x200d;
   /**
-   * @param {string} name
-   * @param {Record<string, any>} context
-   *
-   * @return {any}
-   */
-  function getFromContext(name, context) {
-      if (['nil', 'boolean', 'number', 'string'].includes(getType(context))) {
-          return null;
-      }
-      if (name in context) {
-          return context[name];
-      }
-      const normalizedName = normalizeContextKey(name);
-      if (normalizedName in context) {
-          return context[normalizedName];
+  Returns a next grapheme cluster break _after_ (not equal to)
+  `pos`, if `forward` is true, or before otherwise. Returns `pos`
+  itself if no further cluster break is available in the string.
+  Moves across surrogate pairs, extending characters (when
+  `includeExtending` is true), characters joined with zero-width
+  joiners, and flag emoji.
+  */
+  function findClusterBreak(str, pos, forward = true, includeExtending = true) {
+      return (forward ? nextClusterBreak : prevClusterBreak)(str, pos, includeExtending);
+  }
+  function nextClusterBreak(str, pos, includeExtending) {
+      if (pos == str.length)
+          return pos;
+      // If pos is in the middle of a surrogate pair, move to its start
+      if (pos && surrogateLow(str.charCodeAt(pos)) && surrogateHigh(str.charCodeAt(pos - 1)))
+          pos--;
+      let prev = codePointAt(str, pos);
+      pos += codePointSize(prev);
+      while (pos < str.length) {
+          let next = codePointAt(str, pos);
+          if (prev == ZWJ || next == ZWJ || includeExtending && isExtendingChar(next)) {
+              pos += codePointSize(next);
+              prev = next;
+          }
+          else if (isRegionalIndicator(next)) {
+              let countBefore = 0, i = pos - 2;
+              while (i >= 0 && isRegionalIndicator(codePointAt(str, i))) {
+                  countBefore++;
+                  i -= 2;
+              }
+              if (countBefore % 2 == 0)
+                  break;
+              else
+                  pos += 2;
+          }
+          else {
+              break;
+          }
       }
-      const entry = Object.entries(context).find(([key]) => normalizedName === normalizeContextKey(key));
-      if (entry) {
-          return entry[1];
+      return pos;
+  }
+  function prevClusterBreak(str, pos, includeExtending) {
+      while (pos > 0) {
+          let found = nextClusterBreak(str, pos - 2, includeExtending);
+          if (found < pos)
+              return found;
+          pos--;
       }
-      return null;
+      return 0;
+  }
+  function surrogateLow(ch) { return ch >= 0xDC00 && ch < 0xE000; }
+  function surrogateHigh(ch) { return ch >= 0xD800 && ch < 0xDC00; }
+  /**
+  Find the code point at the given position in a string (like the
+  [`codePointAt`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/codePointAt)
+  string method).
+  */
+  function codePointAt(str, pos) {
+      let code0 = str.charCodeAt(pos);
+      if (!surrogateHigh(code0) || pos + 1 == str.length)
+          return code0;
+      let code1 = str.charCodeAt(pos + 1);
+      if (!surrogateLow(code1))
+          return code0;
+      return ((code0 - 0xd800) << 10) + (code1 - 0xdc00) + 0x10000;
   }
+  /**
+  The amount of positions a character takes up a JavaScript string.
+  */
+  function codePointSize(code) { return code < 0x10000 ? 1 : 2; }
 
-  function duration$1(opts) {
-      if (typeof opts === 'number') {
-          return Duration.fromMillis(opts);
+  const DefaultSplit = /\r\n?|\n/;
+  /**
+  Distinguishes different ways in which positions can be mapped.
+  */
+  var MapMode = /*@__PURE__*/(function (MapMode) {
+      /**
+      Map a position to a valid new position, even when its context
+      was deleted.
+      */
+      MapMode[MapMode["Simple"] = 0] = "Simple";
+      /**
+      Return null if deletion happens across the position.
+      */
+      MapMode[MapMode["TrackDel"] = 1] = "TrackDel";
+      /**
+      Return null if the character _before_ the position is deleted.
+      */
+      MapMode[MapMode["TrackBefore"] = 2] = "TrackBefore";
+      /**
+      Return null if the character _after_ the position is deleted.
+      */
+      MapMode[MapMode["TrackAfter"] = 3] = "TrackAfter";
+  return MapMode})(MapMode || (MapMode = {}));
+  /**
+  A change description is a variant of [change set](https://codemirror.net/6/docs/ref/#state.ChangeSet)
+  that doesn't store the inserted text. As such, it can't be
+  applied, but is cheaper to store and manipulate.
+  */
+  class ChangeDesc {
+      // Sections are encoded as pairs of integers. The first is the
+      // length in the current document, and the second is -1 for
+      // unaffected sections, and the length of the replacement content
+      // otherwise. So an insertion would be (0, n>0), a deletion (n>0,
+      // 0), and a replacement two positive numbers.
+      /**
+      @internal
+      */
+      constructor(
+      /**
+      @internal
+      */
+      sections) {
+          this.sections = sections;
       }
-      return Duration.fromISO(opts);
-  }
-  function date(str = null, time = null, zone = null) {
-      if (time) {
-          if (str) {
-              throw new Error('<str> and <time> provided');
-          }
-          return date(`1900-01-01T${time}`);
+      /**
+      The length of the document before the change.
+      */
+      get length() {
+          let result = 0;
+          for (let i = 0; i < this.sections.length; i += 2)
+              result += this.sections[i];
+          return result;
       }
-      if (typeof str === 'string') {
-          if (str.startsWith('-')) {
-              throw notImplemented('negative date');
-          }
-          if (!str.includes('T')) {
-              // raw dates are in UTC time zone
-              return date(str + 'T00:00:00.000Z');
+      /**
+      The length of the document after the change.
+      */
+      get newLength() {
+          let result = 0;
+          for (let i = 0; i < this.sections.length; i += 2) {
+              let ins = this.sections[i + 1];
+              result += ins < 0 ? this.sections[i] : ins;
           }
-          if (str.includes('@')) {
-              if (zone) {
-                  throw new Error('<zone> already provided');
+          return result;
+      }
+      /**
+      False when there are actual changes in this set.
+      */
+      get empty() { return this.sections.length == 0 || this.sections.length == 2 && this.sections[1] < 0; }
+      /**
+      Iterate over the unchanged parts left by these changes. `posA`
+      provides the position of the range in the old document, `posB`
+      the new position in the changed document.
+      */
+      iterGaps(f) {
+          for (let i = 0, posA = 0, posB = 0; i < this.sections.length;) {
+              let len = this.sections[i++], ins = this.sections[i++];
+              if (ins < 0) {
+                  f(posA, posB, len);
+                  posB += len;
               }
-              const [datePart, zonePart] = str.split('@');
-              return date(datePart, null, Info.normalizeZone(zonePart));
+              else {
+                  posB += ins;
+              }
+              posA += len;
           }
-          return DateTime.fromISO(str.toUpperCase(), {
-              setZone: true,
-              zone
-          });
       }
-      return DateTime.now();
-  }
-
-  // 10.3.4 Built-in functions
-  const builtins = {
-      // 10.3.4.1 Conversion functions
-      'number': function () {
-          throw notImplemented('number');
-      },
-      'string': fn(function (from) {
-          if (arguments.length !== 1) {
-              return null;
-          }
-          return toString(from);
-      }, ['any']),
-      // date(from) => date string
-      // date(from) => date and time
-      // date(year, month, day)
-      'date': fn(function (year, month, day, from) {
-          if (!from && !isNumber(year)) {
-              from = year;
-              year = null;
-          }
-          let d;
-          if (isString(from)) {
-              d = date(from);
-          }
-          if (isDateTime(from)) {
-              d = from;
-          }
-          if (year) {
-              d = date().setZone('utc').set({
-                  year,
-                  month,
-                  day
-              });
-          }
-          return d && ifValid(d.setZone('utc').startOf('day')) || null;
-      }, ['any?', 'number?', 'number?', 'any?']),
-      // date and time(from) => date time string
-      // date and time(date, time)
-      'date and time': fn(function (d, time, from) {
-          let dt;
-          if (isDateTime(d) && isDateTime(time)) {
-              dt = time.set({
-                  year: d.year,
-                  month: d.month,
-                  day: d.day
-              });
-          }
-          if (isString(d)) {
-              from = d;
-              d = null;
-          }
-          if (isString(from)) {
-              dt = date(from);
-          }
-          return dt && ifValid(dt) || null;
-      }, ['any?', 'time?', 'string?'], ['date', 'time', 'from']),
-      // time(from) => time string
-      // time(from) => time, date and time
-      // time(hour, minute, second, offset?) => ...
-      'time': fn(function (hour, minute, second, offset, from) {
-          let t;
-          if (offset) {
-              throw notImplemented('time(..., offset)');
-          }
-          if (isString(hour) || isDateTime(hour)) {
-              from = hour;
-              hour = null;
-          }
-          if (isString(from)) {
-              t = date(null, from);
+      /**
+      Iterate over the ranges changed by these changes. (See
+      [`ChangeSet.iterChanges`](https://codemirror.net/6/docs/ref/#state.ChangeSet.iterChanges) for a
+      variant that also provides you with the inserted text.)
+      `fromA`/`toA` provides the extent of the change in the starting
+      document, `fromB`/`toB` the extent of the replacement in the
+      changed document.
+      
+      When `individual` is true, adjacent changes (which are kept
+      separate for [position mapping](https://codemirror.net/6/docs/ref/#state.ChangeDesc.mapPos)) are
+      reported separately.
+      */
+      iterChangedRanges(f, individual = false) {
+          iterChanges(this, f, individual);
+      }
+      /**
+      Get a description of the inverted form of these changes.
+      */
+      get invertedDesc() {
+          let sections = [];
+          for (let i = 0; i < this.sections.length;) {
+              let len = this.sections[i++], ins = this.sections[i++];
+              if (ins < 0)
+                  sections.push(len, ins);
+              else
+                  sections.push(ins, len);
           }
-          if (isDateTime(from)) {
-              t = from.set({
-                  year: 1900,
-                  month: 1,
-                  day: 1
-              });
+          return new ChangeDesc(sections);
+      }
+      /**
+      Compute the combined effect of applying another set of changes
+      after this one. The length of the document after this set should
+      match the length before `other`.
+      */
+      composeDesc(other) { return this.empty ? other : other.empty ? this : composeSets(this, other); }
+      /**
+      Map this description, which should start with the same document
+      as `other`, over another set of changes, so that it can be
+      applied after it. When `before` is true, map as if the changes
+      in `other` happened before the ones in `this`.
+      */
+      mapDesc(other, before = false) { return other.empty ? this : mapSet(this, other, before); }
+      mapPos(pos, assoc = -1, mode = MapMode.Simple) {
+          let posA = 0, posB = 0;
+          for (let i = 0; i < this.sections.length;) {
+              let len = this.sections[i++], ins = this.sections[i++], endA = posA + len;
+              if (ins < 0) {
+                  if (endA > pos)
+                      return posB + (pos - posA);
+                  posB += len;
+              }
+              else {
+                  if (mode != MapMode.Simple && endA >= pos &&
+                      (mode == MapMode.TrackDel && posA < pos && endA > pos ||
+                          mode == MapMode.TrackBefore && posA < pos ||
+                          mode == MapMode.TrackAfter && endA > pos))
+                      return null;
+                  if (endA > pos || endA == pos && assoc < 0 && !len)
+                      return pos == posA || assoc < 0 ? posB : posB + ins;
+                  posB += ins;
+              }
+              posA = endA;
           }
-          if (isNumber(hour)) {
-              // TODO: support offset = days and time duration
-              t = date().set({
-                  hour,
-                  minute,
-                  second
-              }).set({
-                  year: 1900,
-                  month: 1,
-                  day: 1,
-                  millisecond: 0
-              });
+          if (pos > posA)
+              throw new RangeError(`Position ${pos} is out of range for changeset of length ${posA}`);
+          return posB;
+      }
+      /**
+      Check whether these changes touch a given range. When one of the
+      changes entirely covers the range, the string `"cover"` is
+      returned.
+      */
+      touchesRange(from, to = from) {
+          for (let i = 0, pos = 0; i < this.sections.length && pos <= to;) {
+              let len = this.sections[i++], ins = this.sections[i++], end = pos + len;
+              if (ins >= 0 && pos <= to && end >= from)
+                  return pos < from && end > to ? "cover" : true;
+              pos = end;
           }
-          return t && ifValid(t) || null;
-      }, ['any?', 'number?', 'number?', 'any?', 'any?']),
-      'duration': fn(function (from) {
-          return ifValid(duration$1(from));
-      }, ['string']),
-      'years and months duration': fn(function (from, to) {
-          return ifValid(to.diff(from, ['years', 'months']));
-      }, ['date', 'date']),
-      '@': fn(function (string) {
-          let t;
-          if (/^-?P/.test(string)) {
-              t = duration$1(string);
+          return false;
+      }
+      /**
+      @internal
+      */
+      toString() {
+          let result = "";
+          for (let i = 0; i < this.sections.length;) {
+              let len = this.sections[i++], ins = this.sections[i++];
+              result += (result ? " " : "") + len + (ins >= 0 ? ":" + ins : "");
           }
-          else if (/^[\d]{1,2}:[\d]{1,2}:[\d]{1,2}/.test(string)) {
-              t = date(null, string);
+          return result;
+      }
+      /**
+      Serialize this change desc to a JSON-representable value.
+      */
+      toJSON() { return this.sections; }
+      /**
+      Create a change desc from its JSON representation (as produced
+      by [`toJSON`](https://codemirror.net/6/docs/ref/#state.ChangeDesc.toJSON).
+      */
+      static fromJSON(json) {
+          if (!Array.isArray(json) || json.length % 2 || json.some(a => typeof a != "number"))
+              throw new RangeError("Invalid JSON representation of ChangeDesc");
+          return new ChangeDesc(json);
+      }
+      /**
+      @internal
+      */
+      static create(sections) { return new ChangeDesc(sections); }
+  }
+  /**
+  A change set represents a group of modifications to a document. It
+  stores the document length, and can only be applied to documents
+  with exactly that length.
+  */
+  class ChangeSet extends ChangeDesc {
+      constructor(sections, 
+      /**
+      @internal
+      */
+      inserted) {
+          super(sections);
+          this.inserted = inserted;
+      }
+      /**
+      Apply the changes to a document, returning the modified
+      document.
+      */
+      apply(doc) {
+          if (this.length != doc.length)
+              throw new RangeError("Applying change set to a document with the wrong length");
+          iterChanges(this, (fromA, toA, fromB, _toB, text) => doc = doc.replace(fromB, fromB + (toA - fromA), text), false);
+          return doc;
+      }
+      mapDesc(other, before = false) { return mapSet(this, other, before, true); }
+      /**
+      Given the document as it existed _before_ the changes, return a
+      change set that represents the inverse of this set, which could
+      be used to go from the document created by the changes back to
+      the document as it existed before the changes.
+      */
+      invert(doc) {
+          let sections = this.sections.slice(), inserted = [];
+          for (let i = 0, pos = 0; i < sections.length; i += 2) {
+              let len = sections[i], ins = sections[i + 1];
+              if (ins >= 0) {
+                  sections[i] = ins;
+                  sections[i + 1] = len;
+                  let index = i >> 1;
+                  while (inserted.length < index)
+                      inserted.push(Text$1.empty);
+                  inserted.push(len ? doc.slice(pos, pos + len) : Text$1.empty);
+              }
+              pos += len;
           }
-          else {
-              t = date(string);
+          return new ChangeSet(sections, inserted);
+      }
+      /**
+      Combine two subsequent change sets into a single set. `other`
+      must start in the document produced by `this`. If `this` goes
+      `docA` → `docB` and `other` represents `docB` → `docC`, the
+      returned value will represent the change `docA` → `docC`.
+      */
+      compose(other) { return this.empty ? other : other.empty ? this : composeSets(this, other, true); }
+      /**
+      Given another change set starting in the same document, maps this
+      change set over the other, producing a new change set that can be
+      applied to the document produced by applying `other`. When
+      `before` is `true`, order changes as if `this` comes before
+      `other`, otherwise (the default) treat `other` as coming first.
+      
+      Given two changes `A` and `B`, `A.compose(B.map(A))` and
+      `B.compose(A.map(B, true))` will produce the same document. This
+      provides a basic form of [operational
+      transformation](https://en.wikipedia.org/wiki/Operational_transformation),
+      and can be used for collaborative editing.
+      */
+      map(other, before = false) { return other.empty ? this : mapSet(this, other, before, true); }
+      /**
+      Iterate over the changed ranges in the document, calling `f` for
+      each, with the range in the original document (`fromA`-`toA`)
+      and the range that replaces it in the new document
+      (`fromB`-`toB`).
+      
+      When `individual` is true, adjacent changes are reported
+      separately.
+      */
+      iterChanges(f, individual = false) {
+          iterChanges(this, f, individual);
+      }
+      /**
+      Get a [change description](https://codemirror.net/6/docs/ref/#state.ChangeDesc) for this change
+      set.
+      */
+      get desc() { return ChangeDesc.create(this.sections); }
+      /**
+      @internal
+      */
+      filter(ranges) {
+          let resultSections = [], resultInserted = [], filteredSections = [];
+          let iter = new SectionIter(this);
+          done: for (let i = 0, pos = 0;;) {
+              let next = i == ranges.length ? 1e9 : ranges[i++];
+              while (pos < next || pos == next && iter.len == 0) {
+                  if (iter.done)
+                      break done;
+                  let len = Math.min(iter.len, next - pos);
+                  addSection(filteredSections, len, -1);
+                  let ins = iter.ins == -1 ? -1 : iter.off == 0 ? iter.ins : 0;
+                  addSection(resultSections, len, ins);
+                  if (ins > 0)
+                      addInsert(resultInserted, resultSections, iter.text);
+                  iter.forward(len);
+                  pos += len;
+              }
+              let end = ranges[i++];
+              while (pos < end) {
+                  if (iter.done)
+                      break done;
+                  let len = Math.min(iter.len, end - pos);
+                  addSection(resultSections, len, -1);
+                  addSection(filteredSections, len, iter.ins == -1 ? -1 : iter.off == 0 ? iter.ins : 0);
+                  iter.forward(len);
+                  pos += len;
+              }
           }
-          return t && ifValid(t) || null;
-      }, ['string']),
-      'now': fn(function () {
-          return date();
-      }, []),
-      'today': fn(function () {
-          return date().startOf('day');
-      }, []),
-      // 10.3.4.2 Boolean function
-      'not': fn(function (bool) {
-          return isType(bool, 'boolean') ? !bool : null;
-      }, ['any']),
-      // 10.3.4.3 String functions
-      'substring': fn(function (string, start, length) {
-          const _start = (start < 0 ? string.length + start : start - 1);
-          const arr = Array.from(string);
-          return (typeof length !== 'undefined'
-              ? arr.slice(_start, _start + length)
-              : arr.slice(_start)).join('');
-      }, ['string', 'number', 'number?'], ['string', 'start position', 'length']),
-      'string length': fn(function (string) {
-          return countSymbols(string);
-      }, ['string']),
-      'upper case': fn(function (string) {
-          return string.toUpperCase();
-      }, ['string']),
-      'lower case': fn(function (string) {
-          return string.toLowerCase();
-      }, ['string']),
-      'substring before': fn(function (string, match) {
-          const index = string.indexOf(match);
-          if (index === -1) {
-              return '';
+          return { changes: new ChangeSet(resultSections, resultInserted),
+              filtered: ChangeDesc.create(filteredSections) };
+      }
+      /**
+      Serialize this change set to a JSON-representable value.
+      */
+      toJSON() {
+          let parts = [];
+          for (let i = 0; i < this.sections.length; i += 2) {
+              let len = this.sections[i], ins = this.sections[i + 1];
+              if (ins < 0)
+                  parts.push(len);
+              else if (ins == 0)
+                  parts.push([len]);
+              else
+                  parts.push([len].concat(this.inserted[i >> 1].toJSON()));
           }
-          return string.substring(0, index);
-      }, ['string', 'string']),
-      'substring after': fn(function (string, match) {
-          const index = string.indexOf(match);
-          if (index === -1) {
-              return '';
+          return parts;
+      }
+      /**
+      Create a change set for the given changes, for a document of the
+      given length, using `lineSep` as line separator.
+      */
+      static of(changes, length, lineSep) {
+          let sections = [], inserted = [], pos = 0;
+          let total = null;
+          function flush(force = false) {
+              if (!force && !sections.length)
+                  return;
+              if (pos < length)
+                  addSection(sections, length - pos, -1);
+              let set = new ChangeSet(sections, inserted);
+              total = total ? total.compose(set.map(total)) : set;
+              sections = [];
+              inserted = [];
+              pos = 0;
           }
-          return string.substring(index + match.length);
-      }, ['string', 'string']),
-      'replace': fn(function (input, pattern, replacement, flags) {
-          return input.replace(new RegExp(pattern, 'ug' + (flags || '').replace(/[x]/g, '')), replacement.replace(/\$0/g, '$$&'));
-      }, ['string', 'string', 'string', 'string?']),
-      'contains': fn(function (string, match) {
-          return string.includes(match);
-      }, ['string', 'string']),
-      'starts with': fn(function (string, match) {
-          return string.startsWith(match);
-      }, ['string', 'string']),
-      'ends with': fn(function (string, match) {
-          return string.endsWith(match);
-      }, ['string', 'string']),
-      'split': fn(function (string, delimiter) {
-          return string.split(new RegExp(delimiter, 'u'));
-      }, ['string', 'string']),
-      // 10.3.4.4 List functions
-      'list contains': fn(function (list, element) {
-          return list.some(el => matches(el, element));
-      }, ['list', 'any?']),
-      'count': fn(function (list) {
-          return list.length;
-      }, ['list']),
-      'min': listFn(function (list) {
-          return list.reduce((min, el) => min === null ? el : Math.min(min, el), null);
-      }, 'number'),
-      'max': listFn(function (list) {
-          return list.reduce((max, el) => max === null ? el : Math.max(max, el), null);
-      }, 'number'),
-      'sum': listFn(function (list) {
-          return sum(list);
-      }, 'number'),
-      'mean': listFn(function (list) {
-          const s = sum(list);
-          return s === null ? s : s / list.length;
-      }, 'number'),
-      'all': listFn(function (list) {
-          let nonBool = false;
-          for (const o of list) {
-              if (o === false) {
-                  return false;
+          function process(spec) {
+              if (Array.isArray(spec)) {
+                  for (let sub of spec)
+                      process(sub);
               }
-              if (typeof o !== 'boolean') {
-                  nonBool = true;
+              else if (spec instanceof ChangeSet) {
+                  if (spec.length != length)
+                      throw new RangeError(`Mismatched change set length (got ${spec.length}, expected ${length})`);
+                  flush();
+                  total = total ? total.compose(spec.map(total)) : spec;
+              }
+              else {
+                  let { from, to = from, insert } = spec;
+                  if (from > to || from < 0 || to > length)
+                      throw new RangeError(`Invalid change range ${from} to ${to} (in doc of length ${length})`);
+                  let insText = !insert ? Text$1.empty : typeof insert == "string" ? Text$1.of(insert.split(lineSep || DefaultSplit)) : insert;
+                  let insLen = insText.length;
+                  if (from == to && insLen == 0)
+                      return;
+                  if (from < pos)
+                      flush();
+                  if (from > pos)
+                      addSection(sections, from - pos, -1);
+                  addSection(sections, to - from, insLen);
+                  addInsert(inserted, sections, insText);
+                  pos = to;
               }
           }
-          return nonBool ? null : true;
-      }, 'any?'),
-      'any': listFn(function (list) {
-          let nonBool = false;
-          for (const o of list) {
-              if (o === true) {
-                  return true;
+          process(changes);
+          flush(!total);
+          return total;
+      }
+      /**
+      Create an empty changeset of the given length.
+      */
+      static empty(length) {
+          return new ChangeSet(length ? [length, -1] : [], []);
+      }
+      /**
+      Create a changeset from its JSON representation (as produced by
+      [`toJSON`](https://codemirror.net/6/docs/ref/#state.ChangeSet.toJSON).
+      */
+      static fromJSON(json) {
+          if (!Array.isArray(json))
+              throw new RangeError("Invalid JSON representation of ChangeSet");
+          let sections = [], inserted = [];
+          for (let i = 0; i < json.length; i++) {
+              let part = json[i];
+              if (typeof part == "number") {
+                  sections.push(part, -1);
               }
-              if (typeof o !== 'boolean') {
-                  nonBool = true;
+              else if (!Array.isArray(part) || typeof part[0] != "number" || part.some((e, i) => i && typeof e != "string")) {
+                  throw new RangeError("Invalid JSON representation of ChangeSet");
               }
-          }
-          return nonBool ? null : false;
-      }, 'any?'),
-      'sublist': fn(function (list, start, length) {
-          const _start = (start < 0 ? list.length + start : start - 1);
-          return (typeof length !== 'undefined'
-              ? list.slice(_start, _start + length)
-              : list.slice(_start));
-      }, ['list', 'number', 'number?']),
-      'append': fn(function (list, ...items) {
-          return list.concat(items);
-      }, ['list', 'any?']),
-      'concatenate': fn(function (...args) {
-          return args.reduce((result, arg) => {
-              return result.concat(arg);
-          }, []);
-      }, ['any']),
-      'insert before': fn(function (list, position, newItem) {
-          return list.slice(0, position - 1).concat([newItem], list.slice(position - 1));
-      }, ['list', 'number', 'any?']),
-      'remove': fn(function (list, position) {
-          return list.slice(0, position - 1).concat(list.slice(position));
-      }, ['list', 'number']),
-      'reverse': fn(function (list) {
-          return list.slice().reverse();
-      }, ['list']),
-      'index of': fn(function (list, match) {
-          return list.reduce(function (result, element, index) {
-              if (matches(element, match)) {
-                  result.push(index + 1);
+              else if (part.length == 1) {
+                  sections.push(part[0], 0);
+              }
+              else {
+                  while (inserted.length < i)
+                      inserted.push(Text$1.empty);
+                  inserted[i] = Text$1.of(part.slice(1));
+                  sections.push(part[0], inserted[i].length);
               }
-              return result;
-          }, []);
-      }, ['list', 'any']),
-      'union': fn(function (..._lists) {
-          throw notImplemented('union');
-      }, ['list']),
-      'distinct values': fn(function (_list) {
-          throw notImplemented('distinct values');
-      }, ['list']),
-      'flatten': fn(function (list) {
-          return flatten$1(list);
-      }, ['list']),
-      'product': listFn(function (list) {
-          if (list.length === 0) {
-              return null;
-          }
-          return list.reduce((result, n) => {
-              return result * n;
-          }, 1);
-      }, 'number'),
-      'median': listFn(function (list) {
-          if (list.length === 0) {
-              return null;
-          }
-          return median(list);
-      }, 'number'),
-      'stddev': listFn(function (list) {
-          if (list.length < 2) {
-              return null;
-          }
-          return stddev(list);
-      }, 'number'),
-      'mode': listFn(function (list) {
-          return mode(list);
-      }, 'number'),
-      // 10.3.4.5 Numeric functions
-      'decimal': fn(function (n, scale) {
-          if (!scale) {
-              return round$1(n);
           }
-          const offset = Math.pow(10, scale);
-          return round$1(n * offset) / (offset);
-      }, ['number', 'number']),
-      'floor': fn(function (n) {
-          return Math.floor(n);
-      }, ['number']),
-      'ceiling': fn(function (n) {
-          return Math.ceil(n) + 0;
-      }, ['number']),
-      'abs': fn(function (n) {
-          if (typeof n !== 'number') {
-              return null;
+          return new ChangeSet(sections, inserted);
+      }
+      /**
+      @internal
+      */
+      static createSet(sections, inserted) {
+          return new ChangeSet(sections, inserted);
+      }
+  }
+  function addSection(sections, len, ins, forceJoin = false) {
+      if (len == 0 && ins <= 0)
+          return;
+      let last = sections.length - 2;
+      if (last >= 0 && ins <= 0 && ins == sections[last + 1])
+          sections[last] += len;
+      else if (len == 0 && sections[last] == 0)
+          sections[last + 1] += ins;
+      else if (forceJoin) {
+          sections[last] += len;
+          sections[last + 1] += ins;
+      }
+      else
+          sections.push(len, ins);
+  }
+  function addInsert(values, sections, value) {
+      if (value.length == 0)
+          return;
+      let index = (sections.length - 2) >> 1;
+      if (index < values.length) {
+          values[values.length - 1] = values[values.length - 1].append(value);
+      }
+      else {
+          while (values.length < index)
+              values.push(Text$1.empty);
+          values.push(value);
+      }
+  }
+  function iterChanges(desc, f, individual) {
+      let inserted = desc.inserted;
+      for (let posA = 0, posB = 0, i = 0; i < desc.sections.length;) {
+          let len = desc.sections[i++], ins = desc.sections[i++];
+          if (ins < 0) {
+              posA += len;
+              posB += len;
           }
-          return Math.abs(n);
-      }, ['number']),
-      'modulo': fn(function (dividend, divisor) {
-          if (!divisor) {
-              return null;
+          else {
+              let endA = posA, endB = posB, text = Text$1.empty;
+              for (;;) {
+                  endA += len;
+                  endB += ins;
+                  if (ins && inserted)
+                      text = text.append(inserted[(i - 2) >> 1]);
+                  if (individual || i == desc.sections.length || desc.sections[i + 1] < 0)
+                      break;
+                  len = desc.sections[i++];
+                  ins = desc.sections[i++];
+              }
+              f(posA, endA, posB, endB, text);
+              posA = endA;
+              posB = endB;
           }
-          const adjust = 1000000000;
-          // cf. https://dustinpfister.github.io/2017/09/02/js-whats-wrong-with-modulo/
-          //
-          // need to round here as using this custom modulo
-          // variant is prone to rounding errors
-          return Math.round((dividend % divisor + divisor) % divisor * adjust) / adjust;
-      }, ['number', 'number']),
-      'sqrt': fn(function (number) {
-          if (number < 0) {
-              return null;
+      }
+  }
+  function mapSet(setA, setB, before, mkSet = false) {
+      // Produce a copy of setA that applies to the document after setB
+      // has been applied (assuming both start at the same document).
+      let sections = [], insert = mkSet ? [] : null;
+      let a = new SectionIter(setA), b = new SectionIter(setB);
+      // Iterate over both sets in parallel. inserted tracks, for changes
+      // in A that have to be processed piece-by-piece, whether their
+      // content has been inserted already, and refers to the section
+      // index.
+      for (let inserted = -1;;) {
+          if (a.ins == -1 && b.ins == -1) {
+              // Move across ranges skipped by both sets.
+              let len = Math.min(a.len, b.len);
+              addSection(sections, len, -1);
+              a.forward(len);
+              b.forward(len);
           }
-          return Math.sqrt(number);
-      }, ['number']),
-      'log': fn(function (number) {
-          if (number <= 0) {
-              return null;
+          else if (b.ins >= 0 && (a.ins < 0 || inserted == a.i || a.off == 0 && (b.len < a.len || b.len == a.len && !before))) {
+              // If there's a change in B that comes before the next change in
+              // A (ordered by start pos, then len, then before flag), skip
+              // that (and process any changes in A it covers).
+              let len = b.len;
+              addSection(sections, b.ins, -1);
+              while (len) {
+                  let piece = Math.min(a.len, len);
+                  if (a.ins >= 0 && inserted < a.i && a.len <= piece) {
+                      addSection(sections, 0, a.ins);
+                      if (insert)
+                          addInsert(insert, sections, a.text);
+                      inserted = a.i;
+                  }
+                  a.forward(piece);
+                  len -= piece;
+              }
+              b.next();
           }
-          return Math.log(number);
-      }, ['number']),
-      'exp': fn(function (number) {
-          return Math.exp(number);
-      }, ['number']),
-      'odd': fn(function (number) {
-          return Math.abs(number) % 2 === 1;
-      }, ['number']),
-      'even': fn(function (number) {
-          return Math.abs(number) % 2 === 0;
-      }, ['number']),
-      // 10.3.4.6 Date and time functions
-      'is': fn(function (value1, value2) {
-          if (typeof value1 === 'undefined' || typeof value2 === 'undefined') {
-              return false;
+          else if (a.ins >= 0) {
+              // Process the part of a change in A up to the start of the next
+              // non-deletion change in B (if overlapping).
+              let len = 0, left = a.len;
+              while (left) {
+                  if (b.ins == -1) {
+                      let piece = Math.min(left, b.len);
+                      len += piece;
+                      left -= piece;
+                      b.forward(piece);
+                  }
+                  else if (b.ins == 0 && b.len < left) {
+                      left -= b.len;
+                      b.next();
+                  }
+                  else {
+                      break;
+                  }
+              }
+              addSection(sections, len, inserted < a.i ? a.ins : 0);
+              if (insert && inserted < a.i)
+                  addInsert(insert, sections, a.text);
+              inserted = a.i;
+              a.forward(a.len - left);
           }
-          return equals(value1, value2);
-      }, ['any?', 'any?']),
-      // 10.3.4.7 Range Functions
-      'before': fn(function (a, b) {
-          return before(a, b);
-      }, ['any', 'any']),
-      'after': fn(function (a, b) {
-          return before(b, a);
-      }, ['any', 'any']),
-      'meets': fn(function (a, b) {
-          return meets(a, b);
-      }, ['range', 'range']),
-      'met by': fn(function (a, b) {
-          return meets(b, a);
-      }, ['range', 'range']),
-      'overlaps': fn(function () {
-          throw notImplemented('overlaps');
-      }, ['any?']),
-      'overlaps before': fn(function () {
-          throw notImplemented('overlaps before');
-      }, ['any?']),
-      'overlaps after': fn(function () {
-          throw notImplemented('overlaps after');
-      }, ['any?']),
-      'finishes': fn(function () {
-          throw notImplemented('finishes');
-      }, ['any?']),
-      'finished by': fn(function () {
-          throw notImplemented('finished by');
-      }, ['any?']),
-      'includes': fn(function () {
-          throw notImplemented('includes');
-      }, ['any?']),
-      'during': fn(function () {
-          throw notImplemented('during');
-      }, ['any?']),
-      'starts': fn(function () {
-          throw notImplemented('starts');
-      }, ['any?']),
-      'started by': fn(function () {
-          throw notImplemented('started by');
-      }, ['any?']),
-      'coincides': fn(function () {
-          throw notImplemented('coincides');
-      }, ['any?']),
-      // 10.3.4.8 Temporal built-in functions
-      'day of year': fn(function () {
-          throw notImplemented('day of year');
-      }, ['any?']),
-      'day of week': fn(function () {
-          throw notImplemented('day of week');
-      }, ['any?']),
-      'month of year': fn(function () {
-          throw notImplemented('month of year');
-      }, ['any?']),
-      'week of year': fn(function () {
-          throw notImplemented('week of year');
-      }, ['any?']),
-      // 10.3.4.9 Sort
-      'sort': function () {
-          throw notImplemented('sort');
-      },
-      // 10.3.4.10 Context function
-      'get value': fn(function (m, key) {
-          return getFromContext(key, m);
-      }, ['context', 'string']),
-      'get entries': fn(function (m) {
-          if (arguments.length !== 1) {
-              return null;
+          else if (a.done && b.done) {
+              return insert ? ChangeSet.createSet(sections, insert) : ChangeDesc.create(sections);
           }
-          if (Array.isArray(m)) {
-              return null;
+          else {
+              throw new Error("Mismatched change set lengths");
           }
-          return Object.entries(m).map(([key, value]) => ({ key, value }));
-      }, ['context']),
-      'context': listFn(function (_contexts) {
-          throw notImplemented('context');
-      }, 'context'),
-      'context merge': listFn(function (_contexts) {
-          throw notImplemented('context merge');
-      }, 'context'),
-      'context put': fn(function (_context, _keys, _value) {
-          throw notImplemented('context put');
-      }, ['context', 'list', 'any'])
-  };
-  function matches(a, b) {
-      return a === b;
+      }
   }
-  const FALSE = {};
-  function createArgTester(arg) {
-      const optional = arg.endsWith('?');
-      const type = optional ? arg.substring(0, arg.length - 1) : arg;
-      return function (obj) {
-          const arr = Array.isArray(obj);
-          if (type === 'list') {
-              if (arr || optional && typeof obj === 'undefined') {
-                  return obj;
-              }
-              else {
-                  // implicit conversion obj => [ obj ]
-                  return [obj];
-              }
-          }
-          if (type !== 'any' && arr && obj.length === 1) {
-              // implicit conversion [ obj ] => obj
-              obj = obj[0];
-          }
-          if (type === 'range') {
-              return obj instanceof Range$1 ? obj : FALSE;
+  function composeSets(setA, setB, mkSet = false) {
+      let sections = [];
+      let insert = mkSet ? [] : null;
+      let a = new SectionIter(setA), b = new SectionIter(setB);
+      for (let open = false;;) {
+          if (a.done && b.done) {
+              return insert ? ChangeSet.createSet(sections, insert) : ChangeDesc.create(sections);
           }
-          const objType = getType(obj);
-          if (objType === 'nil') {
-              return (optional ? obj : FALSE);
+          else if (a.ins == 0) { // Deletion in A
+              addSection(sections, a.len, 0, open);
+              a.next();
           }
-          if (type === 'any' || type === objType) {
-              return obj;
+          else if (b.len == 0 && !b.done) { // Insertion in B
+              addSection(sections, 0, b.ins, open);
+              if (insert)
+                  addInsert(insert, sections, b.text);
+              b.next();
           }
-          return typeCast(obj, type) || FALSE;
-      };
-  }
-  function createArgsValidator(argDefinitions) {
-      const tests = argDefinitions.map(createArgTester);
-      return function (args) {
-          while (args.length < argDefinitions.length) {
-              args.push(undefined);
+          else if (a.done || b.done) {
+              throw new Error("Mismatched change set lengths");
           }
-          return args.reduce((result, arg, index) => {
-              if (result === false) {
-                  return result;
+          else {
+              let len = Math.min(a.len2, b.len), sectionLen = sections.length;
+              if (a.ins == -1) {
+                  let insB = b.ins == -1 ? -1 : b.off ? 0 : b.ins;
+                  addSection(sections, len, insB, open);
+                  if (insert && insB)
+                      addInsert(insert, sections, b.text);
               }
-              const test = tests[index];
-              const conversion = test ? test(arg) : arg;
-              if (conversion === FALSE) {
-                  return false;
+              else if (b.ins == -1) {
+                  addSection(sections, a.off ? 0 : a.len, len, open);
+                  if (insert)
+                      addInsert(insert, sections, a.textBit(len));
               }
-              result.push(conversion);
-              return result;
-          }, []);
-      };
-  }
-  /**
-   * @param {Function} fnDefinition
-   * @param {string} type
-   * @param {string[]} [parameterNames]
-   *
-   * @return {Function}
-   */
-  function listFn(fnDefinition, type, parameterNames = null) {
-      const tester = createArgTester(type);
-      const wrappedFn = function (...args) {
-          if (args.length === 0) {
-              return null;
-          }
-          // unwrap first arg
-          if (Array.isArray(args[0]) && args.length === 1) {
-              args = args[0];
-          }
-          if (!args.every(arg => tester(arg) !== FALSE)) {
-              return null;
-          }
-          return fnDefinition(args);
-      };
-      wrappedFn.$args = parameterNames || parseParameterNames(fnDefinition);
-      return wrappedFn;
-  }
-  /**
-   * @param {Function} fnDefinition
-   * @param {string[]} argDefinitions
-   * @param {string[]} [parameterNames]
-   *
-   * @return {Function}
-   */
-  function fn(fnDefinition, argDefinitions, parameterNames = null) {
-      const checkArgs = createArgsValidator(argDefinitions);
-      parameterNames = parameterNames || parseParameterNames(fnDefinition);
-      const wrappedFn = function (...args) {
-          const convertedArgs = checkArgs(args);
-          if (!convertedArgs) {
-              return null;
+              else {
+                  addSection(sections, a.off ? 0 : a.len, b.off ? 0 : b.ins, open);
+                  if (insert && !b.off)
+                      addInsert(insert, sections, b.text);
+              }
+              open = (a.ins > len || b.ins >= 0 && b.len > len) && (open || sections.length > sectionLen);
+              a.forward2(len);
+              b.forward(len);
           }
-          return fnDefinition(...convertedArgs);
-      };
-      wrappedFn.$args = parameterNames;
-      return wrappedFn;
-  }
-  function meets(a, b) {
-      return [
-          (a.end === b.start),
-          (a['end included'] === true),
-          (b['start included'] === true)
-      ].every(v => v);
-  }
-  function before(a, b) {
-      if (a instanceof Range$1 && b instanceof Range$1) {
-          return (a.end < b.start || (!a['end included'] || !b['start included']) && a.end == b.start);
-      }
-      if (a instanceof Range$1) {
-          return (a.end < b || (!a['end included'] && a.end === b));
-      }
-      if (b instanceof Range$1) {
-          return (b.start > a || (!b['start included'] && b.start === a));
-      }
-      return a < b;
-  }
-  function sum(list) {
-      return list.reduce((sum, el) => sum === null ? el : sum + el, null);
-  }
-  function flatten$1([x, ...xs]) {
-      return (x !== undefined
-          ? [...Array.isArray(x) ? flatten$1(x) : [x], ...flatten$1(xs)]
-          : []);
-  }
-  function toKeyString(key) {
-      if (typeof key === 'string' && /\W/.test(key)) {
-          return toString(key, true);
       }
-      return key;
-  }
-  function toDeepString(obj) {
-      return toString(obj, true);
-  }
-  function escapeStr(str) {
-      return str.replace(/("|\\)/g, '\\$1');
   }
-  function toString(obj, wrap = false) {
-      var _a, _b, _c, _d;
-      const type = getType(obj);
-      if (type === 'nil') {
-          return 'null';
-      }
-      if (type === 'string') {
-          return wrap ? `"${escapeStr(obj)}"` : obj;
+  class SectionIter {
+      constructor(set) {
+          this.set = set;
+          this.i = 0;
+          this.next();
       }
-      if (type === 'boolean' || type === 'number') {
-          return String(obj);
+      next() {
+          let { sections } = this.set;
+          if (this.i < sections.length) {
+              this.len = sections[this.i++];
+              this.ins = sections[this.i++];
+          }
+          else {
+              this.len = 0;
+              this.ins = -2;
+          }
+          this.off = 0;
       }
-      if (type === 'list') {
-          return '[' + obj.map(toDeepString).join(', ') + ']';
+      get done() { return this.ins == -2; }
+      get len2() { return this.ins < 0 ? this.len : this.ins; }
+      get text() {
+          let { inserted } = this.set, index = (this.i - 2) >> 1;
+          return index >= inserted.length ? Text$1.empty : inserted[index];
       }
-      if (type === 'context') {
-          return '{' + Object.entries(obj).map(([key, value]) => {
-              return toKeyString(key) + ': ' + toDeepString(value);
-          }).join(', ') + '}';
+      textBit(len) {
+          let { inserted } = this.set, index = (this.i - 2) >> 1;
+          return index >= inserted.length && !len ? Text$1.empty
+              : inserted[index].slice(this.off, len == null ? undefined : this.off + len);
       }
-      if (type === 'duration') {
-          return obj.shiftTo('years', 'months', 'days', 'hours', 'minutes', 'seconds').normalize().toISO();
+      forward(len) {
+          if (len == this.len)
+              this.next();
+          else {
+              this.len -= len;
+              this.off += len;
+          }
       }
-      if (type === 'date time') {
-          if ((_a = obj.zone) === null || _a === void 0 ? void 0 : _a.zoneName) {
-              return obj.toISO({ suppressMilliseconds: true, includeOffset: false }) + '@' + ((_b = obj.zone) === null || _b === void 0 ? void 0 : _b.zoneName);
+      forward2(len) {
+          if (this.ins == -1)
+              this.forward(len);
+          else if (len == this.ins)
+              this.next();
+          else {
+              this.ins -= len;
+              this.off += len;
           }
-          return obj.toISO({ suppressMilliseconds: true });
       }
-      if (type === 'date') {
-          return obj.toISODate();
+  }
+
+  /**
+  A single selection range. When
+  [`allowMultipleSelections`](https://codemirror.net/6/docs/ref/#state.EditorState^allowMultipleSelections)
+  is enabled, a [selection](https://codemirror.net/6/docs/ref/#state.EditorSelection) may hold
+  multiple ranges. By default, selections hold exactly one range.
+  */
+  class SelectionRange {
+      constructor(
+      /**
+      The lower boundary of the range.
+      */
+      from, 
+      /**
+      The upper boundary of the range.
+      */
+      to, flags) {
+          this.from = from;
+          this.to = to;
+          this.flags = flags;
       }
-      if (type === 'range') {
-          return '<range>';
+      /**
+      The anchor of the range—the side that doesn't move when you
+      extend it.
+      */
+      get anchor() { return this.flags & 16 /* RangeFlag.Inverted */ ? this.to : this.from; }
+      /**
+      The head of the range, which is moved when the range is
+      [extended](https://codemirror.net/6/docs/ref/#state.SelectionRange.extend).
+      */
+      get head() { return this.flags & 16 /* RangeFlag.Inverted */ ? this.from : this.to; }
+      /**
+      True when `anchor` and `head` are at the same position.
+      */
+      get empty() { return this.from == this.to; }
+      /**
+      If this is a cursor that is explicitly associated with the
+      character on one of its sides, this returns the side. -1 means
+      the character before its position, 1 the character after, and 0
+      means no association.
+      */
+      get assoc() { return this.flags & 4 /* RangeFlag.AssocBefore */ ? -1 : this.flags & 8 /* RangeFlag.AssocAfter */ ? 1 : 0; }
+      /**
+      The bidirectional text level associated with this cursor, if
+      any.
+      */
+      get bidiLevel() {
+          let level = this.flags & 3 /* RangeFlag.BidiLevelMask */;
+          return level == 3 ? null : level;
       }
-      if (type === 'time') {
-          if ((_c = obj.zone) === null || _c === void 0 ? void 0 : _c.zoneName) {
-              return obj.toISOTime({ suppressMilliseconds: true, includeOffset: false }) + '@' + ((_d = obj.zone) === null || _d === void 0 ? void 0 : _d.zoneName);
+      /**
+      The goal column (stored vertical offset) associated with a
+      cursor. This is used to preserve the vertical position when
+      [moving](https://codemirror.net/6/docs/ref/#view.EditorView.moveVertically) across
+      lines of different length.
+      */
+      get goalColumn() {
+          let value = this.flags >> 5 /* RangeFlag.GoalColumnOffset */;
+          return value == 33554431 /* RangeFlag.NoGoalColumn */ ? undefined : value;
+      }
+      /**
+      Map this range through a change, producing a valid range in the
+      updated document.
+      */
+      map(change, assoc = -1) {
+          let from, to;
+          if (this.empty) {
+              from = to = change.mapPos(this.from, assoc);
           }
-          return obj.toISOTime({ suppressMilliseconds: true });
+          else {
+              from = change.mapPos(this.from, 1);
+              to = change.mapPos(this.to, -1);
+          }
+          return from == this.from && to == this.to ? this : new SelectionRange(from, to, this.flags);
       }
-      if (type === 'function') {
-          return '<function>';
+      /**
+      Extend this range to cover at least `from` to `to`.
+      */
+      extend(from, to = from) {
+          if (from <= this.anchor && to >= this.anchor)
+              return EditorSelection.range(from, to);
+          let head = Math.abs(from - this.anchor) > Math.abs(to - this.anchor) ? from : to;
+          return EditorSelection.range(this.anchor, head);
       }
-      throw notImplemented('string(' + type + ')');
-  }
-  function countSymbols(str) {
-      // cf. https://mathiasbynens.be/notes/javascript-unicode
-      return str.replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, '_').length;
-  }
-  function round$1(n) {
-      const integral = Math.trunc(n);
-      if (n - integral > .5) {
-          return integral + 1;
+      /**
+      Compare this range to another range.
+      */
+      eq(other) {
+          return this.anchor == other.anchor && this.head == other.head;
       }
-      else {
-          return integral;
+      /**
+      Return a JSON-serializable object representing the range.
+      */
+      toJSON() { return { anchor: this.anchor, head: this.head }; }
+      /**
+      Convert a JSON representation of a range to a `SelectionRange`
+      instance.
+      */
+      static fromJSON(json) {
+          if (!json || typeof json.anchor != "number" || typeof json.head != "number")
+              throw new RangeError("Invalid JSON representation for SelectionRange");
+          return EditorSelection.range(json.anchor, json.head);
       }
-  }
-  // adapted from https://stackoverflow.com/a/53577159
-  function stddev(array) {
-      const n = array.length;
-      const mean = array.reduce((a, b) => a + b) / n;
-      return Math.sqrt(array.map(x => Math.pow(x - mean, 2)).reduce((a, b) => a + b) / (n - 1));
-  }
-  function median(array) {
-      const n = array.length;
-      const sorted = array.slice().sort();
-      const mid = n / 2 - 1;
-      const index = Math.ceil(mid);
-      // even
-      if (mid === index) {
-          return (sorted[index] + sorted[index + 1]) / 2;
+      /**
+      @internal
+      */
+      static create(from, to, flags) {
+          return new SelectionRange(from, to, flags);
       }
-      // uneven
-      return sorted[index];
   }
-  function mode(array) {
-      if (array.length < 2) {
-          return array;
+  /**
+  An editor selection holds one or more selection ranges.
+  */
+  class EditorSelection {
+      constructor(
+      /**
+      The ranges in the selection, sorted by position. Ranges cannot
+      overlap (but they may touch, if they aren't empty).
+      */
+      ranges, 
+      /**
+      The index of the _main_ range in the selection (which is
+      usually the range that was added last).
+      */
+      mainIndex) {
+          this.ranges = ranges;
+          this.mainIndex = mainIndex;
       }
-      const buckets = {};
-      for (const n of array) {
-          buckets[n] = (buckets[n] || 0) + 1;
+      /**
+      Map a selection through a change. Used to adjust the selection
+      position for changes.
+      */
+      map(change, assoc = -1) {
+          if (change.empty)
+              return this;
+          return EditorSelection.create(this.ranges.map(r => r.map(change, assoc)), this.mainIndex);
+      }
+      /**
+      Compare this selection to another selection.
+      */
+      eq(other) {
+          if (this.ranges.length != other.ranges.length ||
+              this.mainIndex != other.mainIndex)
+              return false;
+          for (let i = 0; i < this.ranges.length; i++)
+              if (!this.ranges[i].eq(other.ranges[i]))
+                  return false;
+          return true;
+      }
+      /**
+      Get the primary selection range. Usually, you should make sure
+      your code applies to _all_ ranges, by using methods like
+      [`changeByRange`](https://codemirror.net/6/docs/ref/#state.EditorState.changeByRange).
+      */
+      get main() { return this.ranges[this.mainIndex]; }
+      /**
+      Make sure the selection only has one range. Returns a selection
+      holding only the main range from this selection.
+      */
+      asSingle() {
+          return this.ranges.length == 1 ? this : new EditorSelection([this.main], 0);
+      }
+      /**
+      Extend this selection with an extra range.
+      */
+      addRange(range, main = true) {
+          return EditorSelection.create([range].concat(this.ranges), main ? 0 : this.mainIndex + 1);
+      }
+      /**
+      Replace a given range with another range, and then normalize the
+      selection to merge and sort ranges if necessary.
+      */
+      replaceRange(range, which = this.mainIndex) {
+          let ranges = this.ranges.slice();
+          ranges[which] = range;
+          return EditorSelection.create(ranges, this.mainIndex);
+      }
+      /**
+      Convert this selection to an object that can be serialized to
+      JSON.
+      */
+      toJSON() {
+          return { ranges: this.ranges.map(r => r.toJSON()), main: this.mainIndex };
+      }
+      /**
+      Create a selection from a JSON representation.
+      */
+      static fromJSON(json) {
+          if (!json || !Array.isArray(json.ranges) || typeof json.main != "number" || json.main >= json.ranges.length)
+              throw new RangeError("Invalid JSON representation for EditorSelection");
+          return new EditorSelection(json.ranges.map((r) => SelectionRange.fromJSON(r)), json.main);
+      }
+      /**
+      Create a selection holding a single range.
+      */
+      static single(anchor, head = anchor) {
+          return new EditorSelection([EditorSelection.range(anchor, head)], 0);
+      }
+      /**
+      Sort and merge the given set of ranges, creating a valid
+      selection.
+      */
+      static create(ranges, mainIndex = 0) {
+          if (ranges.length == 0)
+              throw new RangeError("A selection needs at least one range");
+          for (let pos = 0, i = 0; i < ranges.length; i++) {
+              let range = ranges[i];
+              if (range.empty ? range.from <= pos : range.from < pos)
+                  return EditorSelection.normalized(ranges.slice(), mainIndex);
+              pos = range.to;
+          }
+          return new EditorSelection(ranges, mainIndex);
+      }
+      /**
+      Create a cursor selection range at the given position. You can
+      safely ignore the optional arguments in most situations.
+      */
+      static cursor(pos, assoc = 0, bidiLevel, goalColumn) {
+          return SelectionRange.create(pos, pos, (assoc == 0 ? 0 : assoc < 0 ? 4 /* RangeFlag.AssocBefore */ : 8 /* RangeFlag.AssocAfter */) |
+              (bidiLevel == null ? 3 : Math.min(2, bidiLevel)) |
+              ((goalColumn !== null && goalColumn !== void 0 ? goalColumn : 33554431 /* RangeFlag.NoGoalColumn */) << 5 /* RangeFlag.GoalColumnOffset */));
+      }
+      /**
+      Create a selection range.
+      */
+      static range(anchor, head, goalColumn, bidiLevel) {
+          let flags = ((goalColumn !== null && goalColumn !== void 0 ? goalColumn : 33554431 /* RangeFlag.NoGoalColumn */) << 5 /* RangeFlag.GoalColumnOffset */) |
+              (bidiLevel == null ? 3 : Math.min(2, bidiLevel));
+          return head < anchor ? SelectionRange.create(head, anchor, 16 /* RangeFlag.Inverted */ | 8 /* RangeFlag.AssocAfter */ | flags)
+              : SelectionRange.create(anchor, head, (head > anchor ? 4 /* RangeFlag.AssocBefore */ : 0) | flags);
+      }
+      /**
+      @internal
+      */
+      static normalized(ranges, mainIndex = 0) {
+          let main = ranges[mainIndex];
+          ranges.sort((a, b) => a.from - b.from);
+          mainIndex = ranges.indexOf(main);
+          for (let i = 1; i < ranges.length; i++) {
+              let range = ranges[i], prev = ranges[i - 1];
+              if (range.empty ? range.from <= prev.to : range.from < prev.to) {
+                  let from = prev.from, to = Math.max(range.to, prev.to);
+                  if (i <= mainIndex)
+                      mainIndex--;
+                  ranges.splice(--i, 2, range.anchor > range.head ? EditorSelection.range(to, from) : EditorSelection.range(from, to));
+              }
+          }
+          return new EditorSelection(ranges, mainIndex);
       }
-      const sorted = Object.entries(buckets).sort((a, b) => b[1] - a[1]);
-      return sorted.filter(s => s[1] === sorted[0][1]).map(e => +e[0]);
   }
-  function ifValid(o) {
-      return o.isValid ? o : null;
+  function checkSelection(selection, docLength) {
+      for (let range of selection.ranges)
+          if (range.to > docLength)
+              throw new RangeError("Selection points outside of document");
   }
 
-  function parseExpressions(expression, context = {}) {
-      return parser$1.configure({
-          top: 'Expressions',
-          contextTracker: trackVariables(context)
-      }).parse(expression);
-  }
-  function parseUnaryTests(expression, context = {}) {
-      return parser$1.configure({
-          top: 'UnaryTests',
-          contextTracker: trackVariables(context)
-      }).parse(expression);
-  }
+  let nextID = 0;
+  /**
+  A facet is a labeled value that is associated with an editor
+  state. It takes inputs from any number of extensions, and combines
+  those into a single output value.
 
-  class Interpreter {
-      _buildExecutionTree(tree, input) {
-          const root = { args: [], nodeInput: input };
-          const stack = [root];
-          tree.iterate({
-              enter(nodeRef) {
-                  const { isError, isSkipped } = nodeRef.type;
-                  const { from, to } = nodeRef;
-                  if (isError) {
-                      throw new Error(`Statement unparseable at [${from}, ${to}]`);
-                  }
-                  if (isSkipped) {
-                      return false;
-                  }
-                  const nodeInput = input.slice(from, to);
-                  stack.push({
-                      nodeInput,
-                      args: []
-                  });
-              },
-              leave(nodeRef) {
-                  if (nodeRef.type.isSkipped) {
-                      return;
-                  }
-                  const { nodeInput, args } = stack.pop();
-                  const parent = stack[stack.length - 1];
-                  const expr = evalNode(nodeRef, nodeInput, args);
-                  parent.args.push(expr);
-              }
-          });
-          return root.args[root.args.length - 1];
+  Examples of uses of facets are the [tab
+  size](https://codemirror.net/6/docs/ref/#state.EditorState^tabSize), [editor
+  attributes](https://codemirror.net/6/docs/ref/#view.EditorView^editorAttributes), and [update
+  listeners](https://codemirror.net/6/docs/ref/#view.EditorView^updateListener).
+  */
+  class Facet {
+      constructor(
+      /**
+      @internal
+      */
+      combine, 
+      /**
+      @internal
+      */
+      compareInput, 
+      /**
+      @internal
+      */
+      compare, isStatic, enables) {
+          this.combine = combine;
+          this.compareInput = compareInput;
+          this.compare = compare;
+          this.isStatic = isStatic;
+          /**
+          @internal
+          */
+          this.id = nextID++;
+          this.default = combine([]);
+          this.extensions = typeof enables == "function" ? enables(this) : enables;
       }
-      evaluate(expression, context = {}) {
-          const parseTree = parseExpressions(expression, context);
-          const root = this._buildExecutionTree(parseTree, expression);
-          return {
-              parseTree,
-              root
-          };
+      /**
+      Define a new facet.
+      */
+      static define(config = {}) {
+          return new Facet(config.combine || ((a) => a), config.compareInput || ((a, b) => a === b), config.compare || (!config.combine ? sameArray : (a, b) => a === b), !!config.static, config.enables);
       }
-      unaryTest(expression, context = {}) {
-          const parseTree = parseUnaryTests(expression, context);
-          const root = this._buildExecutionTree(parseTree, expression);
-          return {
-              parseTree,
-              root
-          };
+      /**
+      Returns an extension that adds the given value to this facet.
+      */
+      of(value) {
+          return new FacetProvider([], this, 0 /* Provider.Static */, value);
       }
-  }
-  const interpreter = new Interpreter();
-  function evaluate$1(expression, context = {}) {
-      const { root } = interpreter.evaluate(expression, context);
-      // root = [ fn(ctx) ]
-      const results = root(context);
-      if (results.length === 1) {
-          return results[0];
+      /**
+      Create an extension that computes a value for the facet from a
+      state. You must take care to declare the parts of the state that
+      this value depends on, since your function is only called again
+      for a new state when one of those parts changed.
+      
+      In cases where your value depends only on a single field, you'll
+      want to use the [`from`](https://codemirror.net/6/docs/ref/#state.Facet.from) method instead.
+      */
+      compute(deps, get) {
+          if (this.isStatic)
+              throw new Error("Can't compute a static facet");
+          return new FacetProvider(deps, this, 1 /* Provider.Single */, get);
       }
-      else {
-          return results;
+      /**
+      Create an extension that computes zero or more values for this
+      facet from a state.
+      */
+      computeN(deps, get) {
+          if (this.isStatic)
+              throw new Error("Can't compute a static facet");
+          return new FacetProvider(deps, this, 2 /* Provider.Multi */, get);
+      }
+      from(field, get) {
+          if (!get)
+              get = x => x;
+          return this.compute([field], state => get(state.field(field)));
       }
   }
-  function evalNode(node, input, args) {
-      switch (node.name) {
-          case 'ArithOp': return (context) => {
-              const nullable = (op, types = ['number']) => (a, b) => {
-                  const left = a(context);
-                  const right = b(context);
-                  if (isArray$1(left)) {
-                      return null;
+  function sameArray(a, b) {
+      return a == b || a.length == b.length && a.every((e, i) => e === b[i]);
+  }
+  class FacetProvider {
+      constructor(dependencies, facet, type, value) {
+          this.dependencies = dependencies;
+          this.facet = facet;
+          this.type = type;
+          this.value = value;
+          this.id = nextID++;
+      }
+      dynamicSlot(addresses) {
+          var _a;
+          let getter = this.value;
+          let compare = this.facet.compareInput;
+          let id = this.id, idx = addresses[id] >> 1, multi = this.type == 2 /* Provider.Multi */;
+          let depDoc = false, depSel = false, depAddrs = [];
+          for (let dep of this.dependencies) {
+              if (dep == "doc")
+                  depDoc = true;
+              else if (dep == "selection")
+                  depSel = true;
+              else if ((((_a = addresses[dep.id]) !== null && _a !== void 0 ? _a : 1) & 1) == 0)
+                  depAddrs.push(addresses[dep.id]);
+          }
+          return {
+              create(state) {
+                  state.values[idx] = getter(state);
+                  return 1 /* SlotStatus.Changed */;
+              },
+              update(state, tr) {
+                  if ((depDoc && tr.docChanged) || (depSel && (tr.docChanged || tr.selection)) || ensureAll(state, depAddrs)) {
+                      let newVal = getter(state);
+                      if (multi ? !compareArray(newVal, state.values[idx], compare) : !compare(newVal, state.values[idx])) {
+                          state.values[idx] = newVal;
+                          return 1 /* SlotStatus.Changed */;
+                      }
                   }
-                  if (isArray$1(right)) {
-                      return null;
+                  return 0;
+              },
+              reconfigure: (state, oldState) => {
+                  let newVal, oldAddr = oldState.config.address[id];
+                  if (oldAddr != null) {
+                      let oldVal = getAddr(oldState, oldAddr);
+                      if (this.dependencies.every(dep => {
+                          return dep instanceof Facet ? oldState.facet(dep) === state.facet(dep) :
+                              dep instanceof StateField ? oldState.field(dep, false) == state.field(dep, false) : true;
+                      }) || (multi ? compareArray(newVal = getter(state), oldVal, compare) : compare(newVal = getter(state), oldVal))) {
+                          state.values[idx] = oldVal;
+                          return 0;
+                      }
                   }
-                  const leftType = getType(left);
-                  const rightType = getType(right);
-                  if (leftType !== rightType ||
-                      !types.includes(leftType)) {
-                      return null;
+                  else {
+                      newVal = getter(state);
                   }
-                  return op(left, right);
-              };
-              switch (input) {
-                  case '+': return nullable((a, b) => a + b, ['string', 'number']);
-                  case '-': return nullable((a, b) => a - b);
-                  case '*': return nullable((a, b) => a * b);
-                  case '/': return nullable((a, b) => !b ? null : a / b);
-                  case '**':
-                  case '^': return nullable((a, b) => Math.pow(a, b));
+                  state.values[idx] = newVal;
+                  return 1 /* SlotStatus.Changed */;
               }
           };
-          case 'CompareOp': return tag(() => {
-              switch (input) {
-                  case '>': return (b) => createRange(b, null, false, false);
-                  case '>=': return (b) => createRange(b, null, true, false);
-                  case '<': return (b) => createRange(null, b, false, false);
-                  case '<=': return (b) => createRange(null, b, false, true);
-                  case '=': return (b) => (a) => equals(a, b);
-                  case '!=': return (b) => (a) => !equals(a, b);
-              }
-          }, Test('boolean'));
-          case 'Wildcard': return (_context) => true;
-          case 'null': return (_context) => {
-              return null;
-          };
-          case 'Disjunction': return tag((context) => {
-              const left = args[0](context);
-              const right = args[2](context);
-              const matrix = [
-                  [true, true, true],
-                  [true, false, true],
-                  [true, null, true],
-                  [false, true, true],
-                  [false, false, false],
-                  [false, null, null],
-                  [null, true, true],
-                  [null, false, null],
-                  [null, null, null],
-              ];
-              const a = typeof left === 'boolean' ? left : null;
-              const b = typeof right === 'boolean' ? right : null;
-              return matrix.find(el => el[0] === a && el[1] === b)[2];
-          }, Test('boolean'));
-          case 'Conjunction': return tag((context) => {
-              const left = args[0](context);
-              const right = args[2](context);
-              const matrix = [
-                  [true, true, true],
-                  [true, false, false],
-                  [true, null, null],
-                  [false, true, false],
-                  [false, false, false],
-                  [false, null, false],
-                  [null, true, null],
-                  [null, false, false],
-                  [null, null, null],
-              ];
-              const a = typeof left === 'boolean' ? left : null;
-              const b = typeof right === 'boolean' ? right : null;
-              return matrix.find(el => el[0] === a && el[1] === b)[2];
-          }, Test('boolean'));
-          case 'Context': return (context) => {
-              return args.slice(1, -1).reduce((obj, arg) => {
-                  const [key, value] = arg(Object.assign(Object.assign({}, context), obj));
-                  return Object.assign(Object.assign({}, obj), { [key]: value });
-              }, {});
-          };
-          case 'FunctionBody': return args[0];
-          case 'FormalParameters': return args;
-          case 'FormalParameter': return args[0];
-          case 'ParameterName': return args.join(' ');
-          case 'FunctionDefinition': return (context) => {
-              const parameterNames = args[2];
-              const fnBody = args[4];
-              return wrapFunction((...args) => {
-                  const fnContext = parameterNames.reduce((context, name, idx) => {
-                      // support positional parameters
-                      context[name] = args[idx];
-                      return context;
-                  }, Object.assign({}, context));
-                  return fnBody(fnContext);
-              }, parameterNames);
-          };
-          case 'ContextEntry': return (context) => {
-              const key = typeof args[0] === 'function' ? args[0](context) : args[0];
-              const value = args[1](context);
-              return [key, value];
-          };
-          case 'Key': return args[0];
-          case 'Identifier': return input;
-          case 'SpecialFunctionName': return (context) => getBuiltin(input);
-          // preserve spaces in name, but compact multiple
-          // spaces into one (token)
-          case 'Name': return input.replace(/\s{2,}/g, ' ');
-          case 'VariableName': return (context) => {
-              const name = args.join(' ');
-              return getBuiltin(name) || getFromContext(name, context);
-          };
-          case 'QualifiedName': return (context) => {
-              return args.reduce((context, arg) => arg(context), context);
-          };
-          case '?': return (context) => getFromContext('?', context);
-          // expression
-          // expression ".." expression
-          case 'IterationContext': return (context) => {
-              const a = args[0](context);
-              const b = args[1] && args[1](context);
-              return b ? createRange(a, b) : a;
-          };
-          case 'Type': return args[0];
-          case 'InExpressions': return (context) => {
-              const iterationContexts = args.map(ctx => ctx(context));
-              if (iterationContexts.some(ctx => getType(ctx) !== 'list')) {
-                  return null;
-              }
-              return cartesianProduct(iterationContexts).map(ctx => {
-                  if (!isArray$1(ctx)) {
-                      ctx = [ctx];
-                  }
-                  return Object.assign({}, context, ...ctx);
-              });
-          };
-          // Name kw<"in"> Expr
-          case 'InExpression': return (context) => {
-              return extractValue(context, args[0], args[2]);
-          };
-          case 'SpecialType': throw notImplemented('SpecialType');
-          case 'InstanceOfExpression': return tag((context) => {
-              const a = args[0](context);
-              const b = args[3](context);
-              return a instanceof b;
-          }, Test('boolean'));
-          case 'every': return tag((context) => {
-              return (_contexts, _condition) => {
-                  const contexts = _contexts(context);
-                  if (getType(contexts) !== 'list') {
-                      return contexts;
-                  }
-                  return contexts.every(ctx => isTruthy(_condition(ctx)));
-              };
-          }, Test('boolean'));
-          case 'some': return tag((context) => {
-              return (_contexts, _condition) => {
-                  const contexts = _contexts(context);
-                  if (getType(contexts) !== 'list') {
-                      return contexts;
-                  }
-                  return contexts.some(ctx => isTruthy(_condition(ctx)));
-              };
-          }, Test('boolean'));
-          case 'NumericLiteral': return tag((_context) => input.includes('.') ? parseFloat(input) : parseInt(input), 'number');
-          case 'BooleanLiteral': return tag((_context) => input === 'true' ? true : false, 'boolean');
-          case 'StringLiteral': return tag((_context) => parseString(input), 'string');
-          case 'PositionalParameters': return (context) => args.map(arg => arg(context));
-          case 'NamedParameter': return (context) => {
-              const name = args[0];
-              const value = args[1](context);
-              return [name, value];
-          };
-          case 'NamedParameters': return (context) => args.reduce((args, arg) => {
-              const [name, value] = arg(context);
-              args[name] = value;
-              return args;
-          }, {});
-          case 'DateTimeConstructor': return (context) => {
-              return getBuiltin(input);
-          };
-          case 'DateTimeLiteral': return (context) => {
-              // AtLiteral
-              if (args.length === 1) {
-                  return args[0](context);
-              }
-              // FunctionInvocation
-              else {
-                  const wrappedFn = wrapFunction(args[0](context));
-                  if (!wrappedFn) {
-                      throw new Error(`Failed to evaluate ${input}: Target is not a function`);
-                  }
-                  const contextOrArgs = args[2](context);
-                  return wrappedFn.invoke(contextOrArgs);
-              }
-          };
-          case 'AtLiteral': return (context) => {
-              const wrappedFn = wrapFunction(getBuiltin('@'));
-              if (!wrappedFn) {
-                  throw new Error(`Failed to evaluate ${input}: Target is not a function`);
-              }
-              return wrappedFn.invoke([args[0](context)]);
-          };
-          case 'FunctionInvocation': return (context) => {
-              const wrappedFn = wrapFunction(args[0](context));
-              if (!wrappedFn) {
-                  throw new Error(`Failed to evaluate ${input}: Target is not a function`);
-              }
-              const contextOrArgs = args[2](context);
-              return wrappedFn.invoke(contextOrArgs);
-          };
-          case 'IfExpression': return (function () {
-              const ifCondition = args[1];
-              const thenValue = args[3];
-              const elseValue = args[5];
-              const type = coalecenseTypes(thenValue, elseValue);
-              return tag((context) => {
-                  if (isTruthy(ifCondition(context))) {
-                      return thenValue(context);
-                  }
-                  else {
-                      return elseValue ? elseValue(context) : null;
-                  }
-              }, type);
-          })();
-          case 'Parameters': return args.length === 3 ? args[1] : (_context) => [];
-          case 'Comparison': return (context) => {
-              const operator = args[1];
-              // expression !compare kw<"in"> PositiveUnaryTest |
-              // expression !compare kw<"in"> !unaryTest "(" PositiveUnaryTests ")"
-              if (operator === 'in') {
-                  return compareIn(args[0](context), (args[3] || args[2])(context));
-              }
-              // expression !compare kw<"between"> expression kw<"and"> expression
-              if (operator === 'between') {
-                  const start = args[2](context);
-                  const end = args[4](context);
-                  if (start === null || end === null) {
-                      return null;
-                  }
-                  return createRange(start, end).includes(args[0](context));
-              }
-              // expression !compare CompareOp<"=" | "!="> expression |
-              // expression !compare CompareOp<Gt | Gte | Lt | Lte> expression |
-              const left = args[0](context);
-              const right = args[2](context);
-              const test = operator()(right);
-              return compareValue(test, left);
-          };
-          case 'QuantifiedExpression': return (context) => {
-              const testFn = args[0](context);
-              const contexts = args[1];
-              const condition = args[3];
-              return testFn(contexts, condition);
-          };
-          // DMN 1.2 - 10.3.2.14
-          // kw<"for"> commaSep1<InExpression<IterationContext>> kw<"return"> expression
-          case 'ForExpression': return (context) => {
-              const extractor = args[args.length - 1];
-              const iterationContexts = args[1](context);
-              if (getType(iterationContexts) !== 'list') {
-                  return iterationContexts;
-              }
-              const partial = [];
-              for (const ctx of iterationContexts) {
-                  partial.push(extractor(Object.assign(Object.assign({}, ctx), { partial })));
-              }
-              return partial;
-          };
-          case 'ArithmeticExpression': return (function () {
-              // binary expression (a + b)
-              if (args.length === 3) {
-                  const [a, op, b] = args;
-                  return tag((context) => {
-                      return op(context)(a, b);
-                  }, coalecenseTypes(a, b));
-              }
-              // unary expression (-b)
-              if (args.length === 2) {
-                  const [op, value] = args;
-                  return tag((context) => {
-                      return op(context)(() => 0, value);
-                  }, value.type);
-              }
-          })();
-          case 'PositiveUnaryTest': return args[0];
-          case 'ParenthesizedExpression': return args[1];
-          case 'PathExpression': return (context) => {
-              const pathTarget = coerceSingleton(args[0](context));
-              const pathProp = args[1];
-              if (isArray$1(pathTarget)) {
-                  return pathTarget.map(pathProp).filter(e => e !== null);
-              }
-              else {
-                  return pathProp(pathTarget);
-              }
-          };
-          // expression !filter "[" expression "]"
-          case 'FilterExpression': return (context) => {
-              const target = args[0](context);
-              const filterFn = args[2];
-              const filterTarget = isArray$1(target) ? target : [target];
-              // null[..]
-              if (target === null) {
-                  return null;
-              }
-              // a[1]
-              if (filterFn.type === 'number') {
-                  const idx = filterFn(context);
-                  const value = filterTarget[idx < 0 ? filterTarget.length + idx : idx - 1];
-                  if (typeof value === 'undefined') {
-                      return null;
-                  }
-                  else {
-                      return value;
-                  }
-              }
-              // a[true]
-              if (filterFn.type === 'boolean') {
-                  if (filterFn(context)) {
-                      return filterTarget;
-                  }
-                  else {
-                      return [];
-                  }
-              }
-              if (filterFn.type === 'string') {
-                  const value = filterFn(context);
-                  return filterTarget.filter(el => el === value);
-              }
-              // a[test]
-              return filterTarget.map(el => {
-                  const iterationContext = Object.assign(Object.assign(Object.assign({}, context), { item: el }), el);
-                  let result = filterFn(iterationContext);
-                  // test is fn(val) => boolean SimpleUnaryTest
-                  if (typeof result === 'function') {
-                      result = result(el);
-                  }
-                  if (result instanceof Range$1) {
-                      result = result.includes(el);
-                  }
-                  if (result === true) {
-                      return el;
-                  }
-                  return result;
-              }).filter(isTruthy);
-          };
-          case 'SimplePositiveUnaryTest': return tag((context) => {
-              // <Interval>
-              if (args.length === 1) {
-                  return args[0](context);
-              }
-              // <CompareOp> <Expr>
-              return args[0](context)(args[1](context));
-          }, 'test');
-          case 'List': return (context) => {
-              return args.slice(1, -1).map(arg => arg(context));
-          };
-          case 'Interval': return tag((context) => {
-              const left = args[1](context);
-              const right = args[2](context);
-              const startIncluded = left !== null && args[0] === '[';
-              const endIncluded = right !== null && args[3] === ']';
-              return createRange(left, right, startIncluded, endIncluded);
-          }, Test('boolean'));
-          case 'PositiveUnaryTests':
-          case 'Expressions': return (context) => {
-              return args.map(a => a(context));
-          };
-          case 'UnaryTests': return (context) => {
-              return (value = null) => {
-                  const negate = args[0] === 'not';
-                  const tests = negate ? args.slice(2, -1) : args;
-                  const matches = tests.map(test => test(context)).flat(1).map(test => {
-                      if (isArray$1(test)) {
-                          return test.includes(value);
-                      }
-                      if (test === null) {
-                          return null;
-                      }
-                      if (typeof test === 'boolean') {
-                          return test;
-                      }
-                      return compareValue(test, value);
-                  }).reduce(combineResult, undefined);
-                  return matches === null ? null : (negate ? !matches : matches);
-              };
-          };
-          default: return node.name;
       }
   }
-  function getBuiltin(name, _context) {
-      return getFromContext(name, builtins);
+  function compareArray(a, b, compare) {
+      if (a.length != b.length)
+          return false;
+      for (let i = 0; i < a.length; i++)
+          if (!compare(a[i], b[i]))
+              return false;
+      return true;
   }
-  function extractValue(context, prop, _target) {
-      const target = _target(context);
-      if (['list', 'range'].includes(getType(target))) {
-          return target.map(t => ({ [prop]: t }));
-      }
-      return null;
+  function ensureAll(state, addrs) {
+      let changed = false;
+      for (let addr of addrs)
+          if (ensureAddr(state, addr) & 1 /* SlotStatus.Changed */)
+              changed = true;
+      return changed;
   }
-  function compareIn(value, tests) {
-      if (!isArray$1(tests)) {
-          if (getType(tests) === 'nil') {
-              return null;
+  function dynamicFacetSlot(addresses, facet, providers) {
+      let providerAddrs = providers.map(p => addresses[p.id]);
+      let providerTypes = providers.map(p => p.type);
+      let dynamic = providerAddrs.filter(p => !(p & 1));
+      let idx = addresses[facet.id] >> 1;
+      function get(state) {
+          let values = [];
+          for (let i = 0; i < providerAddrs.length; i++) {
+              let value = getAddr(state, providerAddrs[i]);
+              if (providerTypes[i] == 2 /* Provider.Multi */)
+                  for (let val of value)
+                      values.push(val);
+              else
+                  values.push(value);
           }
-          tests = [tests];
-      }
-      return tests.some(test => compareValue(test, value));
-  }
-  function compareValue(test, value) {
-      if (typeof test === 'function') {
-          return test(value);
-      }
-      if (test instanceof Range$1) {
-          return test.includes(value);
-      }
-      return equals(test, value);
-  }
-  const chars = Array.from('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
-  function isTyped(type, values) {
-      return (values.some(e => getType(e) === type) &&
-          values.every(e => e === null || getType(e) === type));
-  }
-  const nullRange = new Range$1({
-      start: null,
-      end: null,
-      'start included': false,
-      'end included': false,
-      map() {
-          return [];
-      },
-      includes() {
-          return null;
-      }
-  });
-  function createRange(start, end, startIncluded = true, endIncluded = true) {
-      if (isTyped('string', [start, end])) {
-          return createStringRange(start, end, startIncluded, endIncluded);
-      }
-      if (isTyped('number', [start, end])) {
-          return createNumberRange(start, end, startIncluded, endIncluded);
-      }
-      if (isTyped('duration', [start, end])) {
-          throw notImplemented('range<duration>');
-      }
-      if (isTyped('time', [start, end])) {
-          throw notImplemented('range<time>');
-      }
-      if (isTyped('date time', [start, end])) {
-          throw notImplemented('range<date and time>');
-      }
-      if (isTyped('date', [start, end])) {
-          throw notImplemented('range<date>');
-      }
-      if (start === null && end === null) {
-          return nullRange;
+          return facet.combine(values);
       }
-      throw new Error(`unsupported range: ${start}..${end}`);
-  }
-  function noopMap() {
-      return () => {
-          throw new Error('unsupported range operation: map');
-      };
-  }
-  function valuesMap(values) {
-      return (fn) => values.map(fn);
-  }
-  function valuesIncludes(values) {
-      return (value) => values.includes(value);
-  }
-  function numberMap(start, end, startIncluded, endIncluded) {
-      const direction = start > end ? -1 : 1;
-      return (fn) => {
-          const result = [];
-          for (let i = start;; i += direction) {
-              if (i === 0 && !startIncluded) {
-                  continue;
-              }
-              if (i === end && !endIncluded) {
-                  break;
+      return {
+          create(state) {
+              for (let addr of providerAddrs)
+                  ensureAddr(state, addr);
+              state.values[idx] = get(state);
+              return 1 /* SlotStatus.Changed */;
+          },
+          update(state, tr) {
+              if (!ensureAll(state, dynamic))
+                  return 0;
+              let value = get(state);
+              if (facet.compare(value, state.values[idx]))
+                  return 0;
+              state.values[idx] = value;
+              return 1 /* SlotStatus.Changed */;
+          },
+          reconfigure(state, oldState) {
+              let depChanged = ensureAll(state, providerAddrs);
+              let oldProviders = oldState.config.facets[facet.id], oldValue = oldState.facet(facet);
+              if (oldProviders && !depChanged && sameArray(providers, oldProviders)) {
+                  state.values[idx] = oldValue;
+                  return 0;
               }
-              result.push(fn(i));
-              if (i === end) {
-                  break;
+              let value = get(state);
+              if (facet.compare(value, oldValue)) {
+                  state.values[idx] = oldValue;
+                  return 0;
               }
+              state.values[idx] = value;
+              return 1 /* SlotStatus.Changed */;
           }
-          return result;
       };
   }
-  function includesStart(n, inclusive) {
-      if (inclusive) {
-          return (value) => n <= value;
-      }
-      else {
-          return (value) => n < value;
-      }
-  }
-  function includesEnd(n, inclusive) {
-      if (inclusive) {
-          return (value) => n >= value;
-      }
-      else {
-          return (value) => n > value;
-      }
-  }
-  function anyIncludes(start, end, startIncluded, endIncluded) {
-      let tests = [];
-      if (start === null && end === null) {
-          return () => null;
-      }
-      if (start !== null && end !== null) {
-          if (start > end) {
-              tests = [
-                  includesStart(end, endIncluded),
-                  includesEnd(start, startIncluded)
-              ];
-          }
-          else {
-              tests = [
-                  includesStart(start, startIncluded),
-                  includesEnd(end, endIncluded)
-              ];
-          }
-      }
-      else if (end !== null) {
-          tests = [
-              includesEnd(end, endIncluded)
-          ];
-      }
-      else if (start !== null) {
-          tests = [
-              includesStart(start, startIncluded)
-          ];
-      }
-      return (value) => value === null ? null : tests.every(t => t(value));
-  }
-  function createStringRange(start, end, startIncluded = true, endIncluded = true) {
-      if (start !== null && !chars.includes(start)) {
-          throw new Error('illegal range start: ' + start);
-      }
-      if (end !== null && !chars.includes(end)) {
-          throw new Error('illegal range end: ' + end);
-      }
-      let values;
-      if (start !== null && end !== null) {
-          let startIdx = chars.indexOf(start);
-          let endIdx = chars.indexOf(end);
-          const direction = startIdx > endIdx ? -1 : 1;
-          if (startIncluded === false) {
-              startIdx += direction;
-          }
-          if (endIncluded === false) {
-              endIdx -= direction;
-          }
-          values = chars.slice(startIdx, endIdx + 1);
-      }
-      const map = values ? valuesMap(values) : noopMap();
-      const includes = values ? valuesIncludes(values) : anyIncludes(start, end, startIncluded, endIncluded);
-      return new Range$1({
-          start,
-          end,
-          'start included': startIncluded,
-          'end included': endIncluded,
-          map,
-          includes
-      });
-  }
-  function createNumberRange(start, end, startIncluded, endIncluded) {
-      const map = start !== null && end !== null ? numberMap(start, end, startIncluded, endIncluded) : noopMap();
-      const includes = anyIncludes(start, end, startIncluded, endIncluded);
-      return new Range$1({
-          start,
-          end,
-          'start included': startIncluded,
-          'end included': endIncluded,
-          map,
-          includes
-      });
-  }
-  function cartesianProduct(arrays) {
-      if (arrays.some(arr => getType(arr) === 'nil')) {
-          return null;
-      }
-      const f = (a, b) => [].concat(...a.map(d => b.map(e => [].concat(d, e))));
-      const cartesian = (a, b, ...c) => (b ? cartesian(f(a, b), ...c) : a || []);
-      return cartesian(...arrays);
-  }
-  function coalecenseTypes(a, b) {
-      if (!b) {
-          return a.type;
-      }
-      if (a.type === b.type) {
-          return a.type;
-      }
-      return 'any';
-  }
-  function tag(fn, type) {
-      return Object.assign(fn, {
-          type,
-          toString() {
-              return `TaggedFunction[${type}] ${Function.prototype.toString.call(fn)}`;
-          }
-      });
-  }
-  function combineResult(result, match) {
-      if (!result) {
-          return match;
-      }
-      return result;
-  }
-  function isTruthy(obj) {
-      return obj !== false && obj !== null;
-  }
-  function Test(type) {
-      return `Test<${type}>`;
-  }
-  /**
-   * @param {Function} fn
-   * @param {string[]} [parameterNames]
-   *
-   * @return {FunctionWrapper}
-   */
-  function wrapFunction(fn, parameterNames = null) {
-      if (!fn) {
-          return null;
-      }
-      if (fn instanceof FunctionWrapper) {
-          return fn;
-      }
-      if (fn instanceof Range$1) {
-          return new FunctionWrapper((value) => fn.includes(value), ['value']);
-      }
-      return new FunctionWrapper(fn, parameterNames || parseParameterNames(fn));
-  }
-  function coerceSingleton(values) {
-      if (Array.isArray(values) && values.length === 1) {
-          return values[0];
-      }
-      else {
-          return values;
-      }
-  }
-  function parseString(str) {
-      if (str.startsWith('"')) {
-          str = str.slice(1);
-      }
-      if (str.endsWith('"')) {
-          str = str.slice(0, -1);
-      }
-      return str.replace(/(\\")|(\\\\)|(\\u[a-fA-F0-9]{5,6})|((?:\\u[a-fA-F0-9]{1,4})+)/ig, function (substring, ...groups) {
-          const [quotes, escape, codePoint, charCodes] = groups;
-          if (quotes) {
-              return '"';
-          }
-          if (escape) {
-              return '\\';
-          }
-          const escapePattern = /\\u([a-fA-F0-9]+)/ig;
-          if (codePoint) {
-              const codePointMatch = escapePattern.exec(codePoint);
-              return String.fromCodePoint(parseInt(codePointMatch[1], 16));
-          }
-          if (charCodes) {
-              const chars = [];
-              let charCodeMatch;
-              while ((charCodeMatch = escapePattern.exec(substring)) !== null) {
-                  chars.push(parseInt(charCodeMatch[1], 16));
-              }
-              return String.fromCharCode(...chars);
-          }
-          throw new Error('illegal match');
-      });
-  }
-
+  const initField = /*@__PURE__*/Facet.define({ static: true });
   /**
-  The data structure for documents. @nonabstract
+  Fields can store additional information in an editor state, and
+  keep it in sync with the rest of the state.
   */
-  let Text$1 = class Text {
+  class StateField {
+      constructor(
       /**
       @internal
       */
-      constructor() { }
+      id, createF, updateF, compareF, 
       /**
-      Get the line description around the given position.
+      @internal
       */
-      lineAt(pos) {
-          if (pos < 0 || pos > this.length)
-              throw new RangeError(`Invalid position ${pos} in document of length ${this.length}`);
-          return this.lineInner(pos, false, 1, 0);
+      spec) {
+          this.id = id;
+          this.createF = createF;
+          this.updateF = updateF;
+          this.compareF = compareF;
+          this.spec = spec;
+          /**
+          @internal
+          */
+          this.provides = undefined;
       }
       /**
-      Get the description for the given (1-based) line number.
+      Define a state field.
       */
-      line(n) {
-          if (n < 1 || n > this.lines)
-              throw new RangeError(`Invalid line number ${n} in ${this.lines}-line document`);
-          return this.lineInner(n, true, 1, 0);
+      static define(config) {
+          let field = new StateField(nextID++, config.create, config.update, config.compare || ((a, b) => a === b), config);
+          if (config.provide)
+              field.provides = config.provide(field);
+          return field;
+      }
+      create(state) {
+          let init = state.facet(initField).find(i => i.field == this);
+          return ((init === null || init === void 0 ? void 0 : init.create) || this.createF)(state);
       }
       /**
-      Replace a range of the text with the given content.
+      @internal
       */
-      replace(from, to, text) {
-          let parts = [];
-          this.decompose(0, from, parts, 2 /* Open.To */);
-          if (text.length)
-              text.decompose(0, text.length, parts, 1 /* Open.From */ | 2 /* Open.To */);
-          this.decompose(to, this.length, parts, 1 /* Open.From */);
-          return TextNode.from(parts, this.length - (to - from) + text.length);
+      slot(addresses) {
+          let idx = addresses[this.id] >> 1;
+          return {
+              create: (state) => {
+                  state.values[idx] = this.create(state);
+                  return 1 /* SlotStatus.Changed */;
+              },
+              update: (state, tr) => {
+                  let oldVal = state.values[idx];
+                  let value = this.updateF(oldVal, tr);
+                  if (this.compareF(oldVal, value))
+                      return 0;
+                  state.values[idx] = value;
+                  return 1 /* SlotStatus.Changed */;
+              },
+              reconfigure: (state, oldState) => {
+                  if (oldState.config.address[this.id] != null) {
+                      state.values[idx] = oldState.field(this);
+                      return 0;
+                  }
+                  state.values[idx] = this.create(state);
+                  return 1 /* SlotStatus.Changed */;
+              }
+          };
       }
       /**
-      Append another document to this one.
+      Returns an extension that enables this field and overrides the
+      way it is initialized. Can be useful when you need to provide a
+      non-default starting value for the field.
       */
-      append(other) {
-          return this.replace(this.length, this.length, other);
+      init(create) {
+          return [this, initField.of({ field: this, create })];
       }
       /**
-      Retrieve the text between the given points.
+      State field instances can be used as
+      [`Extension`](https://codemirror.net/6/docs/ref/#state.Extension) values to enable the field in a
+      given state.
       */
-      slice(from, to = this.length) {
-          let parts = [];
-          this.decompose(from, to, parts, 0);
-          return TextNode.from(parts, to - from);
-      }
+      get extension() { return this; }
+  }
+  const Prec_ = { lowest: 4, low: 3, default: 2, high: 1, highest: 0 };
+  function prec(value) {
+      return (ext) => new PrecExtension(ext, value);
+  }
+  /**
+  By default extensions are registered in the order they are found
+  in the flattened form of nested array that was provided.
+  Individual extension values can be assigned a precedence to
+  override this. Extensions that do not have a precedence set get
+  the precedence of the nearest parent with a precedence, or
+  [`default`](https://codemirror.net/6/docs/ref/#state.Prec.default) if there is no such parent. The
+  final ordering of extensions is determined by first sorting by
+  precedence and then by order within each precedence.
+  */
+  const Prec = {
       /**
-      Test whether this text is equal to another instance.
+      The highest precedence level, for extensions that should end up
+      near the start of the precedence ordering.
       */
-      eq(other) {
-          if (other == this)
-              return true;
-          if (other.length != this.length || other.lines != this.lines)
-              return false;
-          let start = this.scanIdentical(other, 1), end = this.length - this.scanIdentical(other, -1);
-          let a = new RawTextCursor(this), b = new RawTextCursor(other);
-          for (let skip = start, pos = start;;) {
-              a.next(skip);
-              b.next(skip);
-              skip = 0;
-              if (a.lineBreak != b.lineBreak || a.done != b.done || a.value != b.value)
-                  return false;
-              pos += a.value.length;
-              if (a.done || pos >= end)
-                  return true;
-          }
-      }
+      highest: /*@__PURE__*/prec(Prec_.highest),
       /**
-      Iterate over the text. When `dir` is `-1`, iteration happens
-      from end to start. This will return lines and the breaks between
-      them as separate strings.
+      A higher-than-default precedence, for extensions that should
+      come before those with default precedence.
       */
-      iter(dir = 1) { return new RawTextCursor(this, dir); }
+      high: /*@__PURE__*/prec(Prec_.high),
       /**
-      Iterate over a range of the text. When `from` > `to`, the
-      iterator will run in reverse.
+      The default precedence, which is also used for extensions
+      without an explicit precedence.
       */
-      iterRange(from, to = this.length) { return new PartialTextCursor(this, from, to); }
+      default: /*@__PURE__*/prec(Prec_.default),
       /**
-      Return a cursor that iterates over the given range of lines,
-      _without_ returning the line breaks between, and yielding empty
-      strings for empty lines.
-      
-      When `from` and `to` are given, they should be 1-based line numbers.
+      A lower-than-default precedence.
       */
-      iterLines(from, to) {
-          let inner;
-          if (from == null) {
-              inner = this.iter();
-          }
-          else {
-              if (to == null)
-                  to = this.lines + 1;
-              let start = this.line(from).from;
-              inner = this.iterRange(start, Math.max(start, to == this.lines + 1 ? this.length : to <= 1 ? 0 : this.line(to - 1).to));
-          }
-          return new LineCursor(inner);
+      low: /*@__PURE__*/prec(Prec_.low),
+      /**
+      The lowest precedence level. Meant for things that should end up
+      near the end of the extension order.
+      */
+      lowest: /*@__PURE__*/prec(Prec_.lowest)
+  };
+  class PrecExtension {
+      constructor(inner, prec) {
+          this.inner = inner;
+          this.prec = prec;
       }
+  }
+  /**
+  Extension compartments can be used to make a configuration
+  dynamic. By [wrapping](https://codemirror.net/6/docs/ref/#state.Compartment.of) part of your
+  configuration in a compartment, you can later
+  [replace](https://codemirror.net/6/docs/ref/#state.Compartment.reconfigure) that part through a
+  transaction.
+  */
+  class Compartment {
       /**
-      @internal
+      Create an instance of this compartment to add to your [state
+      configuration](https://codemirror.net/6/docs/ref/#state.EditorStateConfig.extensions).
       */
-      toString() { return this.sliceString(0); }
+      of(ext) { return new CompartmentInstance(this, ext); }
       /**
-      Convert the document to an array of lines (which can be
-      deserialized again via [`Text.of`](https://codemirror.net/6/docs/ref/#state.Text^of)).
+      Create an [effect](https://codemirror.net/6/docs/ref/#state.TransactionSpec.effects) that
+      reconfigures this compartment.
       */
-      toJSON() {
-          let lines = [];
-          this.flatten(lines);
-          return lines;
+      reconfigure(content) {
+          return Compartment.reconfigure.of({ compartment: this, extension: content });
       }
       /**
-      Create a `Text` instance for the given array of lines.
+      Get the current content of the compartment in the state, or
+      `undefined` if it isn't present.
       */
-      static of(text) {
-          if (text.length == 0)
-              throw new RangeError("A document must have at least one line");
-          if (text.length == 1 && !text[0])
-              return Text.empty;
-          return text.length <= 32 /* Tree.Branch */ ? new TextLeaf(text) : TextNode.from(TextLeaf.split(text, []));
+      get(state) {
+          return state.config.compartments.get(this);
       }
-  };
-  // Leaves store an array of line strings. There are always line breaks
-  // between these strings. Leaves are limited in size and have to be
-  // contained in TextNode instances for bigger documents.
-  class TextLeaf extends Text$1 {
-      constructor(text, length = textLength(text)) {
-          super();
-          this.text = text;
-          this.length = length;
+  }
+  class CompartmentInstance {
+      constructor(compartment, inner) {
+          this.compartment = compartment;
+          this.inner = inner;
       }
-      get lines() { return this.text.length; }
-      get children() { return null; }
-      lineInner(target, isLine, line, offset) {
-          for (let i = 0;; i++) {
-              let string = this.text[i], end = offset + string.length;
-              if ((isLine ? line : end) >= target)
-                  return new Line$1(offset, end, line, string);
-              offset = end + 1;
-              line++;
-          }
+  }
+  class Configuration {
+      constructor(base, compartments, dynamicSlots, address, staticValues, facets) {
+          this.base = base;
+          this.compartments = compartments;
+          this.dynamicSlots = dynamicSlots;
+          this.address = address;
+          this.staticValues = staticValues;
+          this.facets = facets;
+          this.statusTemplate = [];
+          while (this.statusTemplate.length < dynamicSlots.length)
+              this.statusTemplate.push(0 /* SlotStatus.Unresolved */);
       }
-      decompose(from, to, target, open) {
-          let text = from <= 0 && to >= this.length ? this
-              : new TextLeaf(sliceText(this.text, from, to), Math.min(to, this.length) - Math.max(0, from));
-          if (open & 1 /* Open.From */) {
-              let prev = target.pop();
-              let joined = appendText(text.text, prev.text.slice(), 0, text.length);
-              if (joined.length <= 32 /* Tree.Branch */) {
-                  target.push(new TextLeaf(joined, prev.length + text.length));
+      staticFacet(facet) {
+          let addr = this.address[facet.id];
+          return addr == null ? facet.default : this.staticValues[addr >> 1];
+      }
+      static resolve(base, compartments, oldState) {
+          let fields = [];
+          let facets = Object.create(null);
+          let newCompartments = new Map();
+          for (let ext of flatten(base, compartments, newCompartments)) {
+              if (ext instanceof StateField)
+                  fields.push(ext);
+              else
+                  (facets[ext.facet.id] || (facets[ext.facet.id] = [])).push(ext);
+          }
+          let address = Object.create(null);
+          let staticValues = [];
+          let dynamicSlots = [];
+          for (let field of fields) {
+              address[field.id] = dynamicSlots.length << 1;
+              dynamicSlots.push(a => field.slot(a));
+          }
+          let oldFacets = oldState === null || oldState === void 0 ? void 0 : oldState.config.facets;
+          for (let id in facets) {
+              let providers = facets[id], facet = providers[0].facet;
+              let oldProviders = oldFacets && oldFacets[id] || [];
+              if (providers.every(p => p.type == 0 /* Provider.Static */)) {
+                  address[facet.id] = (staticValues.length << 1) | 1;
+                  if (sameArray(oldProviders, providers)) {
+                      staticValues.push(oldState.facet(facet));
+                  }
+                  else {
+                      let value = facet.combine(providers.map(p => p.value));
+                      staticValues.push(oldState && facet.compare(value, oldState.facet(facet)) ? oldState.facet(facet) : value);
+                  }
               }
               else {
-                  let mid = joined.length >> 1;
-                  target.push(new TextLeaf(joined.slice(0, mid)), new TextLeaf(joined.slice(mid)));
+                  for (let p of providers) {
+                      if (p.type == 0 /* Provider.Static */) {
+                          address[p.id] = (staticValues.length << 1) | 1;
+                          staticValues.push(p.value);
+                      }
+                      else {
+                          address[p.id] = dynamicSlots.length << 1;
+                          dynamicSlots.push(a => p.dynamicSlot(a));
+                      }
+                  }
+                  address[facet.id] = dynamicSlots.length << 1;
+                  dynamicSlots.push(a => dynamicFacetSlot(a, facet, providers));
               }
           }
-          else {
-              target.push(text);
-          }
-      }
-      replace(from, to, text) {
-          if (!(text instanceof TextLeaf))
-              return super.replace(from, to, text);
-          let lines = appendText(this.text, appendText(text.text, sliceText(this.text, 0, from)), to);
-          let newLen = this.length + text.length - (to - from);
-          if (lines.length <= 32 /* Tree.Branch */)
-              return new TextLeaf(lines, newLen);
-          return TextNode.from(TextLeaf.split(lines, []), newLen);
+          let dynamic = dynamicSlots.map(f => f(address));
+          return new Configuration(base, newCompartments, dynamic, address, staticValues, facets);
       }
-      sliceString(from, to = this.length, lineSep = "\n") {
-          let result = "";
-          for (let pos = 0, i = 0; pos <= to && i < this.text.length; i++) {
-              let line = this.text[i], end = pos + line.length;
-              if (pos > from && i)
-                  result += lineSep;
-              if (from < end && to > pos)
-                  result += line.slice(Math.max(0, from - pos), to - pos);
-              pos = end + 1;
+  }
+  function flatten(extension, compartments, newCompartments) {
+      let result = [[], [], [], [], []];
+      let seen = new Map();
+      function inner(ext, prec) {
+          let known = seen.get(ext);
+          if (known != null) {
+              if (known <= prec)
+                  return;
+              let found = result[known].indexOf(ext);
+              if (found > -1)
+                  result[known].splice(found, 1);
+              if (ext instanceof CompartmentInstance)
+                  newCompartments.delete(ext.compartment);
           }
-          return result;
-      }
-      flatten(target) {
-          for (let line of this.text)
-              target.push(line);
-      }
-      scanIdentical() { return 0; }
-      static split(text, target) {
-          let part = [], len = -1;
-          for (let line of text) {
-              part.push(line);
-              len += line.length + 1;
-              if (part.length == 32 /* Tree.Branch */) {
-                  target.push(new TextLeaf(part, len));
-                  part = [];
-                  len = -1;
-              }
-          }
-          if (len > -1)
-              target.push(new TextLeaf(part, len));
-          return target;
-      }
-  }
-  // Nodes provide the tree structure of the `Text` type. They store a
-  // number of other nodes or leaves, taking care to balance themselves
-  // on changes. There are implied line breaks _between_ the children of
-  // a node (but not before the first or after the last child).
-  class TextNode extends Text$1 {
-      constructor(children, length) {
-          super();
-          this.children = children;
-          this.length = length;
-          this.lines = 0;
-          for (let child of children)
-              this.lines += child.lines;
-      }
-      lineInner(target, isLine, line, offset) {
-          for (let i = 0;; i++) {
-              let child = this.children[i], end = offset + child.length, endLine = line + child.lines - 1;
-              if ((isLine ? endLine : end) >= target)
-                  return child.lineInner(target, isLine, line, offset);
-              offset = end + 1;
-              line = endLine + 1;
-          }
-      }
-      decompose(from, to, target, open) {
-          for (let i = 0, pos = 0; pos <= to && i < this.children.length; i++) {
-              let child = this.children[i], end = pos + child.length;
-              if (from <= end && to >= pos) {
-                  let childOpen = open & ((pos <= from ? 1 /* Open.From */ : 0) | (end >= to ? 2 /* Open.To */ : 0));
-                  if (pos >= from && end <= to && !childOpen)
-                      target.push(child);
-                  else
-                      child.decompose(from - pos, to - pos, target, childOpen);
-              }
-              pos = end + 1;
+          seen.set(ext, prec);
+          if (Array.isArray(ext)) {
+              for (let e of ext)
+                  inner(e, prec);
           }
-      }
-      replace(from, to, text) {
-          if (text.lines < this.lines)
-              for (let i = 0, pos = 0; i < this.children.length; i++) {
-                  let child = this.children[i], end = pos + child.length;
-                  // Fast path: if the change only affects one child and the
-                  // child's size remains in the acceptable range, only update
-                  // that child
-                  if (from >= pos && to <= end) {
-                      let updated = child.replace(from - pos, to - pos, text);
-                      let totalLines = this.lines - child.lines + updated.lines;
-                      if (updated.lines < (totalLines >> (5 /* Tree.BranchShift */ - 1)) &&
-                          updated.lines > (totalLines >> (5 /* Tree.BranchShift */ + 1))) {
-                          let copy = this.children.slice();
-                          copy[i] = updated;
-                          return new TextNode(copy, this.length - (to - from) + text.length);
-                      }
-                      return super.replace(pos, end, updated);
-                  }
-                  pos = end + 1;
-              }
-          return super.replace(from, to, text);
-      }
-      sliceString(from, to = this.length, lineSep = "\n") {
-          let result = "";
-          for (let i = 0, pos = 0; i < this.children.length && pos <= to; i++) {
-              let child = this.children[i], end = pos + child.length;
-              if (pos > from && i)
-                  result += lineSep;
-              if (from < end && to > pos)
-                  result += child.sliceString(from - pos, to - pos, lineSep);
-              pos = end + 1;
+          else if (ext instanceof CompartmentInstance) {
+              if (newCompartments.has(ext.compartment))
+                  throw new RangeError(`Duplicate use of compartment in extensions`);
+              let content = compartments.get(ext.compartment) || ext.inner;
+              newCompartments.set(ext.compartment, content);
+              inner(content, prec);
           }
-          return result;
-      }
-      flatten(target) {
-          for (let child of this.children)
-              child.flatten(target);
-      }
-      scanIdentical(other, dir) {
-          if (!(other instanceof TextNode))
-              return 0;
-          let length = 0;
-          let [iA, iB, eA, eB] = dir > 0 ? [0, 0, this.children.length, other.children.length]
-              : [this.children.length - 1, other.children.length - 1, -1, -1];
-          for (;; iA += dir, iB += dir) {
-              if (iA == eA || iB == eB)
-                  return length;
-              let chA = this.children[iA], chB = other.children[iB];
-              if (chA != chB)
-                  return length + chA.scanIdentical(chB, dir);
-              length += chA.length + 1;
+          else if (ext instanceof PrecExtension) {
+              inner(ext.inner, ext.prec);
           }
-      }
-      static from(children, length = children.reduce((l, ch) => l + ch.length + 1, -1)) {
-          let lines = 0;
-          for (let ch of children)
-              lines += ch.lines;
-          if (lines < 32 /* Tree.Branch */) {
-              let flat = [];
-              for (let ch of children)
-                  ch.flatten(flat);
-              return new TextLeaf(flat, length);
+          else if (ext instanceof StateField) {
+              result[prec].push(ext);
+              if (ext.provides)
+                  inner(ext.provides, prec);
           }
-          let chunk = Math.max(32 /* Tree.Branch */, lines >> 5 /* Tree.BranchShift */), maxChunk = chunk << 1, minChunk = chunk >> 1;
-          let chunked = [], currentLines = 0, currentLen = -1, currentChunk = [];
-          function add(child) {
-              let last;
-              if (child.lines > maxChunk && child instanceof TextNode) {
-                  for (let node of child.children)
-                      add(node);
-              }
-              else if (child.lines > minChunk && (currentLines > minChunk || !currentLines)) {
-                  flush();
-                  chunked.push(child);
-              }
-              else if (child instanceof TextLeaf && currentLines &&
-                  (last = currentChunk[currentChunk.length - 1]) instanceof TextLeaf &&
-                  child.lines + last.lines <= 32 /* Tree.Branch */) {
-                  currentLines += child.lines;
-                  currentLen += child.length + 1;
-                  currentChunk[currentChunk.length - 1] = new TextLeaf(last.text.concat(child.text), last.length + 1 + child.length);
-              }
-              else {
-                  if (currentLines + child.lines > chunk)
-                      flush();
-                  currentLines += child.lines;
-                  currentLen += child.length + 1;
-                  currentChunk.push(child);
-              }
+          else if (ext instanceof FacetProvider) {
+              result[prec].push(ext);
+              if (ext.facet.extensions)
+                  inner(ext.facet.extensions, Prec_.default);
           }
-          function flush() {
-              if (currentLines == 0)
-                  return;
-              chunked.push(currentChunk.length == 1 ? currentChunk[0] : TextNode.from(currentChunk, currentLen));
-              currentLen = -1;
-              currentLines = currentChunk.length = 0;
+          else {
+              let content = ext.extension;
+              if (!content)
+                  throw new Error(`Unrecognized extension value in extension set (${ext}). This sometimes happens because multiple instances of @codemirror/state are loaded, breaking instanceof checks.`);
+              inner(content, prec);
           }
-          for (let child of children)
-              add(child);
-          flush();
-          return chunked.length == 1 ? chunked[0] : new TextNode(chunked, length);
       }
+      inner(extension, Prec_.default);
+      return result.reduce((a, b) => a.concat(b));
   }
-  Text$1.empty = /*@__PURE__*/new TextLeaf([""], 0);
-  function textLength(text) {
-      let length = -1;
-      for (let line of text)
-          length += line.length + 1;
-      return length;
-  }
-  function appendText(text, target, from = 0, to = 1e9) {
-      for (let pos = 0, i = 0, first = true; i < text.length && pos <= to; i++) {
-          let line = text[i], end = pos + line.length;
-          if (end >= from) {
-              if (end > to)
-                  line = line.slice(0, to - pos);
-              if (pos < from)
-                  line = line.slice(from - pos);
-              if (first) {
-                  target[target.length - 1] += line;
-                  first = false;
-              }
-              else
-                  target.push(line);
-          }
-          pos = end + 1;
-      }
-      return target;
+  function ensureAddr(state, addr) {
+      if (addr & 1)
+          return 2 /* SlotStatus.Computed */;
+      let idx = addr >> 1;
+      let status = state.status[idx];
+      if (status == 4 /* SlotStatus.Computing */)
+          throw new Error("Cyclic dependency between fields and/or facets");
+      if (status & 2 /* SlotStatus.Computed */)
+          return status;
+      state.status[idx] = 4 /* SlotStatus.Computing */;
+      let changed = state.computeSlot(state, state.config.dynamicSlots[idx]);
+      return state.status[idx] = 2 /* SlotStatus.Computed */ | changed;
   }
-  function sliceText(text, from, to) {
-      return appendText(text, [""], from, to);
+  function getAddr(state, addr) {
+      return addr & 1 ? state.config.staticValues[addr >> 1] : state.values[addr >> 1];
   }
-  class RawTextCursor {
-      constructor(text, dir = 1) {
-          this.dir = dir;
-          this.done = false;
-          this.lineBreak = false;
-          this.value = "";
-          this.nodes = [text];
-          this.offsets = [dir > 0 ? 1 : (text instanceof TextLeaf ? text.text.length : text.children.length) << 1];
-      }
-      nextInner(skip, dir) {
-          this.done = this.lineBreak = false;
-          for (;;) {
-              let last = this.nodes.length - 1;
-              let top = this.nodes[last], offsetValue = this.offsets[last], offset = offsetValue >> 1;
-              let size = top instanceof TextLeaf ? top.text.length : top.children.length;
-              if (offset == (dir > 0 ? size : 0)) {
-                  if (last == 0) {
-                      this.done = true;
-                      this.value = "";
-                      return this;
-                  }
-                  if (dir > 0)
-                      this.offsets[last - 1]++;
-                  this.nodes.pop();
-                  this.offsets.pop();
-              }
-              else if ((offsetValue & 1) == (dir > 0 ? 0 : 1)) {
-                  this.offsets[last] += dir;
-                  if (skip == 0) {
-                      this.lineBreak = true;
-                      this.value = "\n";
-                      return this;
-                  }
-                  skip--;
-              }
-              else if (top instanceof TextLeaf) {
-                  // Move to the next string
-                  let next = top.text[offset + (dir < 0 ? -1 : 0)];
-                  this.offsets[last] += dir;
-                  if (next.length > Math.max(0, skip)) {
-                      this.value = skip == 0 ? next : dir > 0 ? next.slice(skip) : next.slice(0, next.length - skip);
-                      return this;
-                  }
-                  skip -= next.length;
-              }
-              else {
-                  let next = top.children[offset + (dir < 0 ? -1 : 0)];
-                  if (skip > next.length) {
-                      skip -= next.length;
-                      this.offsets[last] += dir;
-                  }
-                  else {
-                      if (dir < 0)
-                          this.offsets[last]--;
-                      this.nodes.push(next);
-                      this.offsets.push(dir > 0 ? 1 : (next instanceof TextLeaf ? next.text.length : next.children.length) << 1);
-                  }
-              }
-          }
-      }
-      next(skip = 0) {
-          if (skip < 0) {
-              this.nextInner(-skip, (-this.dir));
-              skip = this.value.length;
-          }
-          return this.nextInner(skip, this.dir);
+
+  const languageData = /*@__PURE__*/Facet.define();
+  const allowMultipleSelections = /*@__PURE__*/Facet.define({
+      combine: values => values.some(v => v),
+      static: true
+  });
+  const lineSeparator = /*@__PURE__*/Facet.define({
+      combine: values => values.length ? values[0] : undefined,
+      static: true
+  });
+  const changeFilter = /*@__PURE__*/Facet.define();
+  const transactionFilter = /*@__PURE__*/Facet.define();
+  const transactionExtender = /*@__PURE__*/Facet.define();
+  const readOnly = /*@__PURE__*/Facet.define({
+      combine: values => values.length ? values[0] : false
+  });
+
+  /**
+  Annotations are tagged values that are used to add metadata to
+  transactions in an extensible way. They should be used to model
+  things that effect the entire transaction (such as its [time
+  stamp](https://codemirror.net/6/docs/ref/#state.Transaction^time) or information about its
+  [origin](https://codemirror.net/6/docs/ref/#state.Transaction^userEvent)). For effects that happen
+  _alongside_ the other changes made by the transaction, [state
+  effects](https://codemirror.net/6/docs/ref/#state.StateEffect) are more appropriate.
+  */
+  class Annotation {
+      /**
+      @internal
+      */
+      constructor(
+      /**
+      The annotation type.
+      */
+      type, 
+      /**
+      The value of this annotation.
+      */
+      value) {
+          this.type = type;
+          this.value = value;
       }
+      /**
+      Define a new type of annotation.
+      */
+      static define() { return new AnnotationType(); }
   }
-  class PartialTextCursor {
-      constructor(text, start, end) {
-          this.value = "";
-          this.done = false;
-          this.cursor = new RawTextCursor(text, start > end ? -1 : 1);
-          this.pos = start > end ? text.length : 0;
-          this.from = Math.min(start, end);
-          this.to = Math.max(start, end);
-      }
-      nextInner(skip, dir) {
-          if (dir < 0 ? this.pos <= this.from : this.pos >= this.to) {
-              this.value = "";
-              this.done = true;
-              return this;
-          }
-          skip += Math.max(0, dir < 0 ? this.pos - this.to : this.from - this.pos);
-          let limit = dir < 0 ? this.pos - this.from : this.to - this.pos;
-          if (skip > limit)
-              skip = limit;
-          limit -= skip;
-          let { value } = this.cursor.next(skip);
-          this.pos += (value.length + skip) * dir;
-          this.value = value.length <= limit ? value : dir < 0 ? value.slice(value.length - limit) : value.slice(0, limit);
-          this.done = !this.value;
-          return this;
-      }
-      next(skip = 0) {
-          if (skip < 0)
-              skip = Math.max(skip, this.from - this.pos);
-          else if (skip > 0)
-              skip = Math.min(skip, this.to - this.pos);
-          return this.nextInner(skip, this.cursor.dir);
-      }
-      get lineBreak() { return this.cursor.lineBreak && this.value != ""; }
+  /**
+  Marker that identifies a type of [annotation](https://codemirror.net/6/docs/ref/#state.Annotation).
+  */
+  class AnnotationType {
+      /**
+      Create an instance of this annotation.
+      */
+      of(value) { return new Annotation(this, value); }
   }
-  class LineCursor {
-      constructor(inner) {
-          this.inner = inner;
-          this.afterBreak = true;
-          this.value = "";
-          this.done = false;
-      }
-      next(skip = 0) {
-          let { done, lineBreak, value } = this.inner.next(skip);
-          if (done) {
-              this.done = true;
-              this.value = "";
-          }
-          else if (lineBreak) {
-              if (this.afterBreak) {
-                  this.value = "";
-              }
-              else {
-                  this.afterBreak = true;
-                  this.next();
-              }
-          }
-          else {
-              this.value = value;
-              this.afterBreak = false;
-          }
-          return this;
+  /**
+  Representation of a type of state effect. Defined with
+  [`StateEffect.define`](https://codemirror.net/6/docs/ref/#state.StateEffect^define).
+  */
+  class StateEffectType {
+      /**
+      @internal
+      */
+      constructor(
+      // The `any` types in these function types are there to work
+      // around TypeScript issue #37631, where the type guard on
+      // `StateEffect.is` mysteriously stops working when these properly
+      // have type `Value`.
+      /**
+      @internal
+      */
+      map) {
+          this.map = map;
       }
-      get lineBreak() { return false; }
-  }
-  if (typeof Symbol != "undefined") {
-      Text$1.prototype[Symbol.iterator] = function () { return this.iter(); };
-      RawTextCursor.prototype[Symbol.iterator] = PartialTextCursor.prototype[Symbol.iterator] =
-          LineCursor.prototype[Symbol.iterator] = function () { return this; };
+      /**
+      Create a [state effect](https://codemirror.net/6/docs/ref/#state.StateEffect) instance of this
+      type.
+      */
+      of(value) { return new StateEffect(this, value); }
   }
   /**
-  This type describes a line in the document. It is created
-  on-demand when lines are [queried](https://codemirror.net/6/docs/ref/#state.Text.lineAt).
+  State effects can be used to represent additional effects
+  associated with a [transaction](https://codemirror.net/6/docs/ref/#state.Transaction.effects). They
+  are often useful to model changes to custom [state
+  fields](https://codemirror.net/6/docs/ref/#state.StateField), when those changes aren't implicit in
+  document or selection changes.
   */
-  let Line$1 = class Line {
+  class StateEffect {
       /**
       @internal
       */
       constructor(
       /**
-      The position of the start of the line.
+      @internal
       */
-      from, 
+      type, 
       /**
-      The position at the end of the line (_before_ the line break,
-      or at the end of document for the last line).
+      The value of this effect.
       */
-      to, 
+      value) {
+          this.type = type;
+          this.value = value;
+      }
       /**
-      This line's line number (1-based).
+      Map this effect through a position mapping. Will return
+      `undefined` when that ends up deleting the effect.
       */
-      number, 
+      map(mapping) {
+          let mapped = this.type.map(this.value, mapping);
+          return mapped === undefined ? undefined : mapped == this.value ? this : new StateEffect(this.type, mapped);
+      }
       /**
-      The line's content.
+      Tells you whether this effect object is of a given
+      [type](https://codemirror.net/6/docs/ref/#state.StateEffectType).
       */
-      text) {
-          this.from = from;
-          this.to = to;
-          this.number = number;
-          this.text = text;
+      is(type) { return this.type == type; }
+      /**
+      Define a new effect type. The type parameter indicates the type
+      of values that his effect holds. It should be a type that
+      doesn't include `undefined`, since that is used in
+      [mapping](https://codemirror.net/6/docs/ref/#state.StateEffect.map) to indicate that an effect is
+      removed.
+      */
+      static define(spec = {}) {
+          return new StateEffectType(spec.map || (v => v));
       }
       /**
-      The length of the line (not including any line break after it).
+      Map an array of effects through a change set.
       */
-      get length() { return this.to - this.from; }
-  };
-
-  // Compressed representation of the Grapheme_Cluster_Break=Extend
-  // information from
-  // http://www.unicode.org/Public/13.0.0/ucd/auxiliary/GraphemeBreakProperty.txt.
-  // Each pair of elements represents a range, as an offet from the
-  // previous range and a length. Numbers are in base-36, with the empty
-  // string being a shorthand for 1.
-  let extend = /*@__PURE__*/"lc,34,7n,7,7b,19,,,,2,,2,,,20,b,1c,l,g,,2t,7,2,6,2,2,,4,z,,u,r,2j,b,1m,9,9,,o,4,,9,,3,,5,17,3,3b,f,,w,1j,,,,4,8,4,,3,7,a,2,t,,1m,,,,2,4,8,,9,,a,2,q,,2,2,1l,,4,2,4,2,2,3,3,,u,2,3,,b,2,1l,,4,5,,2,4,,k,2,m,6,,,1m,,,2,,4,8,,7,3,a,2,u,,1n,,,,c,,9,,14,,3,,1l,3,5,3,,4,7,2,b,2,t,,1m,,2,,2,,3,,5,2,7,2,b,2,s,2,1l,2,,,2,4,8,,9,,a,2,t,,20,,4,,2,3,,,8,,29,,2,7,c,8,2q,,2,9,b,6,22,2,r,,,,,,1j,e,,5,,2,5,b,,10,9,,2u,4,,6,,2,2,2,p,2,4,3,g,4,d,,2,2,6,,f,,jj,3,qa,3,t,3,t,2,u,2,1s,2,,7,8,,2,b,9,,19,3,3b,2,y,,3a,3,4,2,9,,6,3,63,2,2,,1m,,,7,,,,,2,8,6,a,2,,1c,h,1r,4,1c,7,,,5,,14,9,c,2,w,4,2,2,,3,1k,,,2,3,,,3,1m,8,2,2,48,3,,d,,7,4,,6,,3,2,5i,1m,,5,ek,,5f,x,2da,3,3x,,2o,w,fe,6,2x,2,n9w,4,,a,w,2,28,2,7k,,3,,4,,p,2,5,,47,2,q,i,d,,12,8,p,b,1a,3,1c,,2,4,2,2,13,,1v,6,2,2,2,2,c,,8,,1b,,1f,,,3,2,2,5,2,,,16,2,8,,6m,,2,,4,,fn4,,kh,g,g,g,a6,2,gt,,6a,,45,5,1ae,3,,2,5,4,14,3,4,,4l,2,fx,4,ar,2,49,b,4w,,1i,f,1k,3,1d,4,2,2,1x,3,10,5,,8,1q,,c,2,1g,9,a,4,2,,2n,3,2,,,2,6,,4g,,3,8,l,2,1l,2,,,,,m,,e,7,3,5,5f,8,2,3,,,n,,29,,2,6,,,2,,,2,,2,6j,,2,4,6,2,,2,r,2,2d,8,2,,,2,2y,,,,2,6,,,2t,3,2,4,,5,77,9,,2,6t,,a,2,,,4,,40,4,2,2,4,,w,a,14,6,2,4,8,,9,6,2,3,1a,d,,2,ba,7,,6,,,2a,m,2,7,,2,,2,3e,6,3,,,2,,7,,,20,2,3,,,,9n,2,f0b,5,1n,7,t4,,1r,4,29,,f5k,2,43q,,,3,4,5,8,8,2,7,u,4,44,3,1iz,1j,4,1e,8,,e,,m,5,,f,11s,7,,h,2,7,,2,,5,79,7,c5,4,15s,7,31,7,240,5,gx7k,2o,3k,6o".split(",").map(s => s ? parseInt(s, 36) : 1);
-  // Convert offsets into absolute values
-  for (let i = 1; i < extend.length; i++)
-      extend[i] += extend[i - 1];
-  function isExtendingChar(code) {
-      for (let i = 1; i < extend.length; i += 2)
-          if (extend[i] > code)
-              return extend[i - 1] <= code;
-      return false;
-  }
-  function isRegionalIndicator(code) {
-      return code >= 0x1F1E6 && code <= 0x1F1FF;
+      static mapEffects(effects, mapping) {
+          if (!effects.length)
+              return effects;
+          let result = [];
+          for (let effect of effects) {
+              let mapped = effect.map(mapping);
+              if (mapped)
+                  result.push(mapped);
+          }
+          return result;
+      }
   }
-  const ZWJ = 0x200d;
   /**
-  Returns a next grapheme cluster break _after_ (not equal to)
-  `pos`, if `forward` is true, or before otherwise. Returns `pos`
-  itself if no further cluster break is available in the string.
-  Moves across surrogate pairs, extending characters (when
-  `includeExtending` is true), characters joined with zero-width
-  joiners, and flag emoji.
-  */
-  function findClusterBreak(str, pos, forward = true, includeExtending = true) {
-      return (forward ? nextClusterBreak : prevClusterBreak)(str, pos, includeExtending);
-  }
-  function nextClusterBreak(str, pos, includeExtending) {
-      if (pos == str.length)
-          return pos;
-      // If pos is in the middle of a surrogate pair, move to its start
-      if (pos && surrogateLow(str.charCodeAt(pos)) && surrogateHigh(str.charCodeAt(pos - 1)))
-          pos--;
-      let prev = codePointAt(str, pos);
-      pos += codePointSize(prev);
-      while (pos < str.length) {
-          let next = codePointAt(str, pos);
-          if (prev == ZWJ || next == ZWJ || includeExtending && isExtendingChar(next)) {
-              pos += codePointSize(next);
-              prev = next;
-          }
-          else if (isRegionalIndicator(next)) {
-              let countBefore = 0, i = pos - 2;
-              while (i >= 0 && isRegionalIndicator(codePointAt(str, i))) {
-                  countBefore++;
-                  i -= 2;
-              }
-              if (countBefore % 2 == 0)
-                  break;
-              else
-                  pos += 2;
-          }
-          else {
-              break;
-          }
-      }
-      return pos;
-  }
-  function prevClusterBreak(str, pos, includeExtending) {
-      while (pos > 0) {
-          let found = nextClusterBreak(str, pos - 2, includeExtending);
-          if (found < pos)
-              return found;
-          pos--;
-      }
-      return 0;
-  }
-  function surrogateLow(ch) { return ch >= 0xDC00 && ch < 0xE000; }
-  function surrogateHigh(ch) { return ch >= 0xD800 && ch < 0xDC00; }
-  /**
-  Find the code point at the given position in a string (like the
-  [`codePointAt`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/codePointAt)
-  string method).
+  This effect can be used to reconfigure the root extensions of
+  the editor. Doing this will discard any extensions
+  [appended](https://codemirror.net/6/docs/ref/#state.StateEffect^appendConfig), but does not reset
+  the content of [reconfigured](https://codemirror.net/6/docs/ref/#state.Compartment.reconfigure)
+  compartments.
   */
-  function codePointAt(str, pos) {
-      let code0 = str.charCodeAt(pos);
-      if (!surrogateHigh(code0) || pos + 1 == str.length)
-          return code0;
-      let code1 = str.charCodeAt(pos + 1);
-      if (!surrogateLow(code1))
-          return code0;
-      return ((code0 - 0xd800) << 10) + (code1 - 0xdc00) + 0x10000;
-  }
+  StateEffect.reconfigure = /*@__PURE__*/StateEffect.define();
   /**
-  The amount of positions a character takes up a JavaScript string.
+  Append extensions to the top-level configuration of the editor.
   */
-  function codePointSize(code) { return code < 0x10000 ? 1 : 2; }
-
-  const DefaultSplit = /\r\n?|\n/;
+  StateEffect.appendConfig = /*@__PURE__*/StateEffect.define();
   /**
-  Distinguishes different ways in which positions can be mapped.
+  Changes to the editor state are grouped into transactions.
+  Typically, a user action creates a single transaction, which may
+  contain any number of document changes, may change the selection,
+  or have other effects. Create a transaction by calling
+  [`EditorState.update`](https://codemirror.net/6/docs/ref/#state.EditorState.update), or immediately
+  dispatch one by calling
+  [`EditorView.dispatch`](https://codemirror.net/6/docs/ref/#view.EditorView.dispatch).
   */
-  var MapMode = /*@__PURE__*/(function (MapMode) {
+  class Transaction {
+      constructor(
       /**
-      Map a position to a valid new position, even when its context
-      was deleted.
+      The state from which the transaction starts.
       */
-      MapMode[MapMode["Simple"] = 0] = "Simple";
+      startState, 
       /**
-      Return null if deletion happens across the position.
+      The document changes made by this transaction.
       */
-      MapMode[MapMode["TrackDel"] = 1] = "TrackDel";
+      changes, 
       /**
-      Return null if the character _before_ the position is deleted.
+      The selection set by this transaction, or undefined if it
+      doesn't explicitly set a selection.
       */
-      MapMode[MapMode["TrackBefore"] = 2] = "TrackBefore";
+      selection, 
       /**
-      Return null if the character _after_ the position is deleted.
+      The effects added to the transaction.
       */
-      MapMode[MapMode["TrackAfter"] = 3] = "TrackAfter";
-  return MapMode})(MapMode || (MapMode = {}));
-  /**
-  A change description is a variant of [change set](https://codemirror.net/6/docs/ref/#state.ChangeSet)
-  that doesn't store the inserted text. As such, it can't be
-  applied, but is cheaper to store and manipulate.
-  */
-  class ChangeDesc {
-      // Sections are encoded as pairs of integers. The first is the
-      // length in the current document, and the second is -1 for
-      // unaffected sections, and the length of the replacement content
-      // otherwise. So an insertion would be (0, n>0), a deletion (n>0,
-      // 0), and a replacement two positive numbers.
+      effects, 
       /**
       @internal
       */
-      constructor(
+      annotations, 
       /**
-      @internal
+      Whether the selection should be scrolled into view after this
+      transaction is dispatched.
       */
-      sections) {
-          this.sections = sections;
+      scrollIntoView) {
+          this.startState = startState;
+          this.changes = changes;
+          this.selection = selection;
+          this.effects = effects;
+          this.annotations = annotations;
+          this.scrollIntoView = scrollIntoView;
+          /**
+          @internal
+          */
+          this._doc = null;
+          /**
+          @internal
+          */
+          this._state = null;
+          if (selection)
+              checkSelection(selection, changes.newLength);
+          if (!annotations.some((a) => a.type == Transaction.time))
+              this.annotations = annotations.concat(Transaction.time.of(Date.now()));
       }
       /**
-      The length of the document before the change.
+      @internal
       */
-      get length() {
-          let result = 0;
-          for (let i = 0; i < this.sections.length; i += 2)
-              result += this.sections[i];
-          return result;
+      static create(startState, changes, selection, effects, annotations, scrollIntoView) {
+          return new Transaction(startState, changes, selection, effects, annotations, scrollIntoView);
       }
       /**
-      The length of the document after the change.
+      The new document produced by the transaction. Contrary to
+      [`.state`](https://codemirror.net/6/docs/ref/#state.Transaction.state)`.doc`, accessing this won't
+      force the entire new state to be computed right away, so it is
+      recommended that [transaction
+      filters](https://codemirror.net/6/docs/ref/#state.EditorState^transactionFilter) use this getter
+      when they need to look at the new document.
       */
-      get newLength() {
-          let result = 0;
-          for (let i = 0; i < this.sections.length; i += 2) {
-              let ins = this.sections[i + 1];
-              result += ins < 0 ? this.sections[i] : ins;
-          }
-          return result;
+      get newDoc() {
+          return this._doc || (this._doc = this.changes.apply(this.startState.doc));
       }
       /**
-      False when there are actual changes in this set.
+      The new selection produced by the transaction. If
+      [`this.selection`](https://codemirror.net/6/docs/ref/#state.Transaction.selection) is undefined,
+      this will [map](https://codemirror.net/6/docs/ref/#state.EditorSelection.map) the start state's
+      current selection through the changes made by the transaction.
       */
-      get empty() { return this.sections.length == 0 || this.sections.length == 2 && this.sections[1] < 0; }
+      get newSelection() {
+          return this.selection || this.startState.selection.map(this.changes);
+      }
       /**
-      Iterate over the unchanged parts left by these changes. `posA`
-      provides the position of the range in the old document, `posB`
-      the new position in the changed document.
+      The new state created by the transaction. Computed on demand
+      (but retained for subsequent access), so it is recommended not to
+      access it in [transaction
+      filters](https://codemirror.net/6/docs/ref/#state.EditorState^transactionFilter) when possible.
       */
-      iterGaps(f) {
-          for (let i = 0, posA = 0, posB = 0; i < this.sections.length;) {
-              let len = this.sections[i++], ins = this.sections[i++];
-              if (ins < 0) {
-                  f(posA, posB, len);
-                  posB += len;
-              }
-              else {
-                  posB += ins;
-              }
-              posA += len;
-          }
+      get state() {
+          if (!this._state)
+              this.startState.applyTransaction(this);
+          return this._state;
       }
       /**
-      Iterate over the ranges changed by these changes. (See
-      [`ChangeSet.iterChanges`](https://codemirror.net/6/docs/ref/#state.ChangeSet.iterChanges) for a
-      variant that also provides you with the inserted text.)
-      `fromA`/`toA` provides the extent of the change in the starting
-      document, `fromB`/`toB` the extent of the replacement in the
-      changed document.
-      
-      When `individual` is true, adjacent changes (which are kept
-      separate for [position mapping](https://codemirror.net/6/docs/ref/#state.ChangeDesc.mapPos)) are
-      reported separately.
+      Get the value of the given annotation type, if any.
       */
-      iterChangedRanges(f, individual = false) {
-          iterChanges(this, f, individual);
+      annotation(type) {
+          for (let ann of this.annotations)
+              if (ann.type == type)
+                  return ann.value;
+          return undefined;
       }
       /**
-      Get a description of the inverted form of these changes.
+      Indicates whether the transaction changed the document.
       */
-      get invertedDesc() {
-          let sections = [];
-          for (let i = 0; i < this.sections.length;) {
-              let len = this.sections[i++], ins = this.sections[i++];
-              if (ins < 0)
-                  sections.push(len, ins);
-              else
-                  sections.push(ins, len);
-          }
-          return new ChangeDesc(sections);
-      }
+      get docChanged() { return !this.changes.empty; }
       /**
-      Compute the combined effect of applying another set of changes
-      after this one. The length of the document after this set should
-      match the length before `other`.
+      Indicates whether this transaction reconfigures the state
+      (through a [configuration compartment](https://codemirror.net/6/docs/ref/#state.Compartment) or
+      with a top-level configuration
+      [effect](https://codemirror.net/6/docs/ref/#state.StateEffect^reconfigure).
       */
-      composeDesc(other) { return this.empty ? other : other.empty ? this : composeSets(this, other); }
+      get reconfigured() { return this.startState.config != this.state.config; }
       /**
-      Map this description, which should start with the same document
-      as `other`, over another set of changes, so that it can be
-      applied after it. When `before` is true, map as if the changes
-      in `other` happened before the ones in `this`.
+      Returns true if the transaction has a [user
+      event](https://codemirror.net/6/docs/ref/#state.Transaction^userEvent) annotation that is equal to
+      or more specific than `event`. For example, if the transaction
+      has `"select.pointer"` as user event, `"select"` and
+      `"select.pointer"` will match it.
       */
-      mapDesc(other, before = false) { return other.empty ? this : mapSet(this, other, before); }
-      mapPos(pos, assoc = -1, mode = MapMode.Simple) {
-          let posA = 0, posB = 0;
-          for (let i = 0; i < this.sections.length;) {
-              let len = this.sections[i++], ins = this.sections[i++], endA = posA + len;
-              if (ins < 0) {
-                  if (endA > pos)
-                      return posB + (pos - posA);
-                  posB += len;
-              }
-              else {
-                  if (mode != MapMode.Simple && endA >= pos &&
-                      (mode == MapMode.TrackDel && posA < pos && endA > pos ||
-                          mode == MapMode.TrackBefore && posA < pos ||
-                          mode == MapMode.TrackAfter && endA > pos))
-                      return null;
-                  if (endA > pos || endA == pos && assoc < 0 && !len)
-                      return pos == posA || assoc < 0 ? posB : posB + ins;
-                  posB += ins;
-              }
-              posA = endA;
+      isUserEvent(event) {
+          let e = this.annotation(Transaction.userEvent);
+          return !!(e && (e == event || e.length > event.length && e.slice(0, event.length) == event && e[event.length] == "."));
+      }
+  }
+  /**
+  Annotation used to store transaction timestamps. Automatically
+  added to every transaction, holding `Date.now()`.
+  */
+  Transaction.time = /*@__PURE__*/Annotation.define();
+  /**
+  Annotation used to associate a transaction with a user interface
+  event. Holds a string identifying the event, using a
+  dot-separated format to support attaching more specific
+  information. The events used by the core libraries are:
+
+   - `"input"` when content is entered
+     - `"input.type"` for typed input
+       - `"input.type.compose"` for composition
+     - `"input.paste"` for pasted input
+     - `"input.drop"` when adding content with drag-and-drop
+     - `"input.complete"` when autocompleting
+   - `"delete"` when the user deletes content
+     - `"delete.selection"` when deleting the selection
+     - `"delete.forward"` when deleting forward from the selection
+     - `"delete.backward"` when deleting backward from the selection
+     - `"delete.cut"` when cutting to the clipboard
+   - `"move"` when content is moved
+     - `"move.drop"` when content is moved within the editor through drag-and-drop
+   - `"select"` when explicitly changing the selection
+     - `"select.pointer"` when selecting with a mouse or other pointing device
+   - `"undo"` and `"redo"` for history actions
+
+  Use [`isUserEvent`](https://codemirror.net/6/docs/ref/#state.Transaction.isUserEvent) to check
+  whether the annotation matches a given event.
+  */
+  Transaction.userEvent = /*@__PURE__*/Annotation.define();
+  /**
+  Annotation indicating whether a transaction should be added to
+  the undo history or not.
+  */
+  Transaction.addToHistory = /*@__PURE__*/Annotation.define();
+  /**
+  Annotation indicating (when present and true) that a transaction
+  represents a change made by some other actor, not the user. This
+  is used, for example, to tag other people's changes in
+  collaborative editing.
+  */
+  Transaction.remote = /*@__PURE__*/Annotation.define();
+  function joinRanges(a, b) {
+      let result = [];
+      for (let iA = 0, iB = 0;;) {
+          let from, to;
+          if (iA < a.length && (iB == b.length || b[iB] >= a[iA])) {
+              from = a[iA++];
+              to = a[iA++];
           }
-          if (pos > posA)
-              throw new RangeError(`Position ${pos} is out of range for changeset of length ${posA}`);
-          return posB;
+          else if (iB < b.length) {
+              from = b[iB++];
+              to = b[iB++];
+          }
+          else
+              return result;
+          if (!result.length || result[result.length - 1] < from)
+              result.push(from, to);
+          else if (result[result.length - 1] < to)
+              result[result.length - 1] = to;
       }
-      /**
-      Check whether these changes touch a given range. When one of the
-      changes entirely covers the range, the string `"cover"` is
-      returned.
-      */
-      touchesRange(from, to = from) {
-          for (let i = 0, pos = 0; i < this.sections.length && pos <= to;) {
-              let len = this.sections[i++], ins = this.sections[i++], end = pos + len;
-              if (ins >= 0 && pos <= to && end >= from)
-                  return pos < from && end > to ? "cover" : true;
-              pos = end;
+  }
+  function mergeTransaction(a, b, sequential) {
+      var _a;
+      let mapForA, mapForB, changes;
+      if (sequential) {
+          mapForA = b.changes;
+          mapForB = ChangeSet.empty(b.changes.length);
+          changes = a.changes.compose(b.changes);
+      }
+      else {
+          mapForA = b.changes.map(a.changes);
+          mapForB = a.changes.mapDesc(b.changes, true);
+          changes = a.changes.compose(mapForA);
+      }
+      return {
+          changes,
+          selection: b.selection ? b.selection.map(mapForB) : (_a = a.selection) === null || _a === void 0 ? void 0 : _a.map(mapForA),
+          effects: StateEffect.mapEffects(a.effects, mapForA).concat(StateEffect.mapEffects(b.effects, mapForB)),
+          annotations: a.annotations.length ? a.annotations.concat(b.annotations) : b.annotations,
+          scrollIntoView: a.scrollIntoView || b.scrollIntoView
+      };
+  }
+  function resolveTransactionInner(state, spec, docSize) {
+      let sel = spec.selection, annotations = asArray(spec.annotations);
+      if (spec.userEvent)
+          annotations = annotations.concat(Transaction.userEvent.of(spec.userEvent));
+      return {
+          changes: spec.changes instanceof ChangeSet ? spec.changes
+              : ChangeSet.of(spec.changes || [], docSize, state.facet(lineSeparator)),
+          selection: sel && (sel instanceof EditorSelection ? sel : EditorSelection.single(sel.anchor, sel.head)),
+          effects: asArray(spec.effects),
+          annotations,
+          scrollIntoView: !!spec.scrollIntoView
+      };
+  }
+  function resolveTransaction(state, specs, filter) {
+      let s = resolveTransactionInner(state, specs.length ? specs[0] : {}, state.doc.length);
+      if (specs.length && specs[0].filter === false)
+          filter = false;
+      for (let i = 1; i < specs.length; i++) {
+          if (specs[i].filter === false)
+              filter = false;
+          let seq = !!specs[i].sequential;
+          s = mergeTransaction(s, resolveTransactionInner(state, specs[i], seq ? s.changes.newLength : state.doc.length), seq);
+      }
+      let tr = Transaction.create(state, s.changes, s.selection, s.effects, s.annotations, s.scrollIntoView);
+      return extendTransaction(filter ? filterTransaction(tr) : tr);
+  }
+  // Finish a transaction by applying filters if necessary.
+  function filterTransaction(tr) {
+      let state = tr.startState;
+      // Change filters
+      let result = true;
+      for (let filter of state.facet(changeFilter)) {
+          let value = filter(tr);
+          if (value === false) {
+              result = false;
+              break;
           }
-          return false;
+          if (Array.isArray(value))
+              result = result === true ? value : joinRanges(result, value);
       }
-      /**
-      @internal
-      */
-      toString() {
-          let result = "";
-          for (let i = 0; i < this.sections.length;) {
-              let len = this.sections[i++], ins = this.sections[i++];
-              result += (result ? " " : "") + len + (ins >= 0 ? ":" + ins : "");
+      if (result !== true) {
+          let changes, back;
+          if (result === false) {
+              back = tr.changes.invertedDesc;
+              changes = ChangeSet.empty(state.doc.length);
           }
-          return result;
+          else {
+              let filtered = tr.changes.filter(result);
+              changes = filtered.changes;
+              back = filtered.filtered.mapDesc(filtered.changes).invertedDesc;
+          }
+          tr = Transaction.create(state, changes, tr.selection && tr.selection.map(back), StateEffect.mapEffects(tr.effects, back), tr.annotations, tr.scrollIntoView);
       }
-      /**
-      Serialize this change desc to a JSON-representable value.
-      */
-      toJSON() { return this.sections; }
-      /**
-      Create a change desc from its JSON representation (as produced
-      by [`toJSON`](https://codemirror.net/6/docs/ref/#state.ChangeDesc.toJSON).
-      */
-      static fromJSON(json) {
-          if (!Array.isArray(json) || json.length % 2 || json.some(a => typeof a != "number"))
-              throw new RangeError("Invalid JSON representation of ChangeDesc");
-          return new ChangeDesc(json);
+      // Transaction filters
+      let filters = state.facet(transactionFilter);
+      for (let i = filters.length - 1; i >= 0; i--) {
+          let filtered = filters[i](tr);
+          if (filtered instanceof Transaction)
+              tr = filtered;
+          else if (Array.isArray(filtered) && filtered.length == 1 && filtered[0] instanceof Transaction)
+              tr = filtered[0];
+          else
+              tr = resolveTransaction(state, asArray(filtered), false);
       }
-      /**
-      @internal
-      */
-      static create(sections) { return new ChangeDesc(sections); }
+      return tr;
+  }
+  function extendTransaction(tr) {
+      let state = tr.startState, extenders = state.facet(transactionExtender), spec = tr;
+      for (let i = extenders.length - 1; i >= 0; i--) {
+          let extension = extenders[i](tr);
+          if (extension && Object.keys(extension).length)
+              spec = mergeTransaction(spec, resolveTransactionInner(state, extension, tr.changes.newLength), true);
+      }
+      return spec == tr ? tr : Transaction.create(state, tr.changes, tr.selection, spec.effects, spec.annotations, spec.scrollIntoView);
+  }
+  const none$1 = [];
+  function asArray(value) {
+      return value == null ? none$1 : Array.isArray(value) ? value : [value];
   }
+
   /**
-  A change set represents a group of modifications to a document. It
-  stores the document length, and can only be applied to documents
-  with exactly that length.
+  The categories produced by a [character
+  categorizer](https://codemirror.net/6/docs/ref/#state.EditorState.charCategorizer). These are used
+  do things like selecting by word.
   */
-  class ChangeSet extends ChangeDesc {
-      constructor(sections, 
+  var CharCategory = /*@__PURE__*/(function (CharCategory) {
       /**
-      @internal
+      Word characters.
       */
-      inserted) {
-          super(sections);
-          this.inserted = inserted;
-      }
+      CharCategory[CharCategory["Word"] = 0] = "Word";
       /**
-      Apply the changes to a document, returning the modified
-      document.
+      Whitespace.
       */
-      apply(doc) {
-          if (this.length != doc.length)
-              throw new RangeError("Applying change set to a document with the wrong length");
-          iterChanges(this, (fromA, toA, fromB, _toB, text) => doc = doc.replace(fromB, fromB + (toA - fromA), text), false);
-          return doc;
-      }
-      mapDesc(other, before = false) { return mapSet(this, other, before, true); }
+      CharCategory[CharCategory["Space"] = 1] = "Space";
       /**
-      Given the document as it existed _before_ the changes, return a
-      change set that represents the inverse of this set, which could
-      be used to go from the document created by the changes back to
-      the document as it existed before the changes.
+      Anything else.
       */
-      invert(doc) {
-          let sections = this.sections.slice(), inserted = [];
-          for (let i = 0, pos = 0; i < sections.length; i += 2) {
-              let len = sections[i], ins = sections[i + 1];
-              if (ins >= 0) {
-                  sections[i] = ins;
-                  sections[i + 1] = len;
-                  let index = i >> 1;
-                  while (inserted.length < index)
-                      inserted.push(Text$1.empty);
-                  inserted.push(len ? doc.slice(pos, pos + len) : Text$1.empty);
-              }
-              pos += len;
-          }
-          return new ChangeSet(sections, inserted);
-      }
-      /**
-      Combine two subsequent change sets into a single set. `other`
-      must start in the document produced by `this`. If `this` goes
-      `docA` → `docB` and `other` represents `docB` → `docC`, the
-      returned value will represent the change `docA` → `docC`.
-      */
-      compose(other) { return this.empty ? other : other.empty ? this : composeSets(this, other, true); }
+      CharCategory[CharCategory["Other"] = 2] = "Other";
+  return CharCategory})(CharCategory || (CharCategory = {}));
+  const nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
+  let wordChar;
+  try {
+      wordChar = /*@__PURE__*/new RegExp("[\\p{Alphabetic}\\p{Number}_]", "u");
+  }
+  catch (_) { }
+  function hasWordChar(str) {
+      if (wordChar)
+          return wordChar.test(str);
+      for (let i = 0; i < str.length; i++) {
+          let ch = str[i];
+          if (/\w/.test(ch) || ch > "\x80" && (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch)))
+              return true;
+      }
+      return false;
+  }
+  function makeCategorizer(wordChars) {
+      return (char) => {
+          if (!/\S/.test(char))
+              return CharCategory.Space;
+          if (hasWordChar(char))
+              return CharCategory.Word;
+          for (let i = 0; i < wordChars.length; i++)
+              if (char.indexOf(wordChars[i]) > -1)
+                  return CharCategory.Word;
+          return CharCategory.Other;
+      };
+  }
+
+  /**
+  The editor state class is a persistent (immutable) data structure.
+  To update a state, you [create](https://codemirror.net/6/docs/ref/#state.EditorState.update) a
+  [transaction](https://codemirror.net/6/docs/ref/#state.Transaction), which produces a _new_ state
+  instance, without modifying the original object.
+
+  As such, _never_ mutate properties of a state directly. That'll
+  just break things.
+  */
+  class EditorState {
+      constructor(
       /**
-      Given another change set starting in the same document, maps this
-      change set over the other, producing a new change set that can be
-      applied to the document produced by applying `other`. When
-      `before` is `true`, order changes as if `this` comes before
-      `other`, otherwise (the default) treat `other` as coming first.
-      
-      Given two changes `A` and `B`, `A.compose(B.map(A))` and
-      `B.compose(A.map(B, true))` will produce the same document. This
-      provides a basic form of [operational
-      transformation](https://en.wikipedia.org/wiki/Operational_transformation),
-      and can be used for collaborative editing.
+      @internal
       */
-      map(other, before = false) { return other.empty ? this : mapSet(this, other, before, true); }
+      config, 
       /**
-      Iterate over the changed ranges in the document, calling `f` for
-      each, with the range in the original document (`fromA`-`toA`)
-      and the range that replaces it in the new document
-      (`fromB`-`toB`).
-      
-      When `individual` is true, adjacent changes are reported
-      separately.
+      The current document.
       */
-      iterChanges(f, individual = false) {
-          iterChanges(this, f, individual);
-      }
+      doc, 
       /**
-      Get a [change description](https://codemirror.net/6/docs/ref/#state.ChangeDesc) for this change
-      set.
+      The current selection.
       */
-      get desc() { return ChangeDesc.create(this.sections); }
+      selection, 
       /**
       @internal
       */
-      filter(ranges) {
-          let resultSections = [], resultInserted = [], filteredSections = [];
-          let iter = new SectionIter(this);
-          done: for (let i = 0, pos = 0;;) {
-              let next = i == ranges.length ? 1e9 : ranges[i++];
-              while (pos < next || pos == next && iter.len == 0) {
-                  if (iter.done)
-                      break done;
-                  let len = Math.min(iter.len, next - pos);
-                  addSection(filteredSections, len, -1);
-                  let ins = iter.ins == -1 ? -1 : iter.off == 0 ? iter.ins : 0;
-                  addSection(resultSections, len, ins);
-                  if (ins > 0)
-                      addInsert(resultInserted, resultSections, iter.text);
-                  iter.forward(len);
-                  pos += len;
-              }
-              let end = ranges[i++];
-              while (pos < end) {
-                  if (iter.done)
-                      break done;
-                  let len = Math.min(iter.len, end - pos);
-                  addSection(resultSections, len, -1);
-                  addSection(filteredSections, len, iter.ins == -1 ? -1 : iter.off == 0 ? iter.ins : 0);
-                  iter.forward(len);
-                  pos += len;
-              }
+      values, computeSlot, tr) {
+          this.config = config;
+          this.doc = doc;
+          this.selection = selection;
+          this.values = values;
+          this.status = config.statusTemplate.slice();
+          this.computeSlot = computeSlot;
+          // Fill in the computed state immediately, so that further queries
+          // for it made during the update return this state
+          if (tr)
+              tr._state = this;
+          for (let i = 0; i < this.config.dynamicSlots.length; i++)
+              ensureAddr(this, i << 1);
+          this.computeSlot = null;
+      }
+      field(field, require = true) {
+          let addr = this.config.address[field.id];
+          if (addr == null) {
+              if (require)
+                  throw new RangeError("Field is not present in this state");
+              return undefined;
           }
-          return { changes: new ChangeSet(resultSections, resultInserted),
-              filtered: ChangeDesc.create(filteredSections) };
+          ensureAddr(this, addr);
+          return getAddr(this, addr);
       }
       /**
-      Serialize this change set to a JSON-representable value.
+      Create a [transaction](https://codemirror.net/6/docs/ref/#state.Transaction) that updates this
+      state. Any number of [transaction specs](https://codemirror.net/6/docs/ref/#state.TransactionSpec)
+      can be passed. Unless
+      [`sequential`](https://codemirror.net/6/docs/ref/#state.TransactionSpec.sequential) is set, the
+      [changes](https://codemirror.net/6/docs/ref/#state.TransactionSpec.changes) (if any) of each spec
+      are assumed to start in the _current_ document (not the document
+      produced by previous specs), and its
+      [selection](https://codemirror.net/6/docs/ref/#state.TransactionSpec.selection) and
+      [effects](https://codemirror.net/6/docs/ref/#state.TransactionSpec.effects) are assumed to refer
+      to the document created by its _own_ changes. The resulting
+      transaction contains the combined effect of all the different
+      specs. For [selection](https://codemirror.net/6/docs/ref/#state.TransactionSpec.selection), later
+      specs take precedence over earlier ones.
       */
-      toJSON() {
-          let parts = [];
-          for (let i = 0; i < this.sections.length; i += 2) {
-              let len = this.sections[i], ins = this.sections[i + 1];
-              if (ins < 0)
-                  parts.push(len);
-              else if (ins == 0)
-                  parts.push([len]);
-              else
-                  parts.push([len].concat(this.inserted[i >> 1].toJSON()));
-          }
-          return parts;
+      update(...specs) {
+          return resolveTransaction(this, specs, true);
       }
       /**
-      Create a change set for the given changes, for a document of the
-      given length, using `lineSep` as line separator.
+      @internal
       */
-      static of(changes, length, lineSep) {
-          let sections = [], inserted = [], pos = 0;
-          let total = null;
-          function flush(force = false) {
-              if (!force && !sections.length)
-                  return;
-              if (pos < length)
-                  addSection(sections, length - pos, -1);
-              let set = new ChangeSet(sections, inserted);
-              total = total ? total.compose(set.map(total)) : set;
-              sections = [];
-              inserted = [];
-              pos = 0;
-          }
-          function process(spec) {
-              if (Array.isArray(spec)) {
-                  for (let sub of spec)
-                      process(sub);
+      applyTransaction(tr) {
+          let conf = this.config, { base, compartments } = conf;
+          for (let effect of tr.effects) {
+              if (effect.is(Compartment.reconfigure)) {
+                  if (conf) {
+                      compartments = new Map;
+                      conf.compartments.forEach((val, key) => compartments.set(key, val));
+                      conf = null;
+                  }
+                  compartments.set(effect.value.compartment, effect.value.extension);
               }
-              else if (spec instanceof ChangeSet) {
-                  if (spec.length != length)
-                      throw new RangeError(`Mismatched change set length (got ${spec.length}, expected ${length})`);
-                  flush();
-                  total = total ? total.compose(spec.map(total)) : spec;
+              else if (effect.is(StateEffect.reconfigure)) {
+                  conf = null;
+                  base = effect.value;
               }
-              else {
-                  let { from, to = from, insert } = spec;
-                  if (from > to || from < 0 || to > length)
-                      throw new RangeError(`Invalid change range ${from} to ${to} (in doc of length ${length})`);
-                  let insText = !insert ? Text$1.empty : typeof insert == "string" ? Text$1.of(insert.split(lineSep || DefaultSplit)) : insert;
-                  let insLen = insText.length;
-                  if (from == to && insLen == 0)
-                      return;
-                  if (from < pos)
-                      flush();
-                  if (from > pos)
-                      addSection(sections, from - pos, -1);
-                  addSection(sections, to - from, insLen);
-                  addInsert(inserted, sections, insText);
-                  pos = to;
+              else if (effect.is(StateEffect.appendConfig)) {
+                  conf = null;
+                  base = asArray(base).concat(effect.value);
               }
           }
-          process(changes);
-          flush(!total);
-          return total;
+          let startValues;
+          if (!conf) {
+              conf = Configuration.resolve(base, compartments, this);
+              let intermediateState = new EditorState(conf, this.doc, this.selection, conf.dynamicSlots.map(() => null), (state, slot) => slot.reconfigure(state, this), null);
+              startValues = intermediateState.values;
+          }
+          else {
+              startValues = tr.startState.values.slice();
+          }
+          new EditorState(conf, tr.newDoc, tr.newSelection, startValues, (state, slot) => slot.update(state, tr), tr);
       }
       /**
-      Create an empty changeset of the given length.
+      Create a [transaction spec](https://codemirror.net/6/docs/ref/#state.TransactionSpec) that
+      replaces every selection range with the given content.
       */
-      static empty(length) {
-          return new ChangeSet(length ? [length, -1] : [], []);
+      replaceSelection(text) {
+          if (typeof text == "string")
+              text = this.toText(text);
+          return this.changeByRange(range => ({ changes: { from: range.from, to: range.to, insert: text },
+              range: EditorSelection.cursor(range.from + text.length) }));
       }
       /**
-      Create a changeset from its JSON representation (as produced by
-      [`toJSON`](https://codemirror.net/6/docs/ref/#state.ChangeSet.toJSON).
+      Create a set of changes and a new selection by running the given
+      function for each range in the active selection. The function
+      can return an optional set of changes (in the coordinate space
+      of the start document), plus an updated range (in the coordinate
+      space of the document produced by the call's own changes). This
+      method will merge all the changes and ranges into a single
+      changeset and selection, and return it as a [transaction
+      spec](https://codemirror.net/6/docs/ref/#state.TransactionSpec), which can be passed to
+      [`update`](https://codemirror.net/6/docs/ref/#state.EditorState.update).
       */
-      static fromJSON(json) {
-          if (!Array.isArray(json))
-              throw new RangeError("Invalid JSON representation of ChangeSet");
-          let sections = [], inserted = [];
-          for (let i = 0; i < json.length; i++) {
-              let part = json[i];
-              if (typeof part == "number") {
-                  sections.push(part, -1);
-              }
-              else if (!Array.isArray(part) || typeof part[0] != "number" || part.some((e, i) => i && typeof e != "string")) {
-                  throw new RangeError("Invalid JSON representation of ChangeSet");
-              }
-              else if (part.length == 1) {
-                  sections.push(part[0], 0);
-              }
-              else {
-                  while (inserted.length < i)
-                      inserted.push(Text$1.empty);
-                  inserted[i] = Text$1.of(part.slice(1));
-                  sections.push(part[0], inserted[i].length);
-              }
+      changeByRange(f) {
+          let sel = this.selection;
+          let result1 = f(sel.ranges[0]);
+          let changes = this.changes(result1.changes), ranges = [result1.range];
+          let effects = asArray(result1.effects);
+          for (let i = 1; i < sel.ranges.length; i++) {
+              let result = f(sel.ranges[i]);
+              let newChanges = this.changes(result.changes), newMapped = newChanges.map(changes);
+              for (let j = 0; j < i; j++)
+                  ranges[j] = ranges[j].map(newMapped);
+              let mapBy = changes.mapDesc(newChanges, true);
+              ranges.push(result.range.map(mapBy));
+              changes = changes.compose(newMapped);
+              effects = StateEffect.mapEffects(effects, newMapped).concat(StateEffect.mapEffects(asArray(result.effects), mapBy));
           }
-          return new ChangeSet(sections, inserted);
+          return {
+              changes,
+              selection: EditorSelection.create(ranges, sel.mainIndex),
+              effects
+          };
       }
       /**
-      @internal
+      Create a [change set](https://codemirror.net/6/docs/ref/#state.ChangeSet) from the given change
+      description, taking the state's document length and line
+      separator into account.
       */
-      static createSet(sections, inserted) {
-          return new ChangeSet(sections, inserted);
+      changes(spec = []) {
+          if (spec instanceof ChangeSet)
+              return spec;
+          return ChangeSet.of(spec, this.doc.length, this.facet(EditorState.lineSeparator));
       }
-  }
-  function addSection(sections, len, ins, forceJoin = false) {
-      if (len == 0 && ins <= 0)
-          return;
-      let last = sections.length - 2;
-      if (last >= 0 && ins <= 0 && ins == sections[last + 1])
-          sections[last] += len;
-      else if (len == 0 && sections[last] == 0)
-          sections[last + 1] += ins;
-      else if (forceJoin) {
-          sections[last] += len;
-          sections[last + 1] += ins;
+      /**
+      Using the state's [line
+      separator](https://codemirror.net/6/docs/ref/#state.EditorState^lineSeparator), create a
+      [`Text`](https://codemirror.net/6/docs/ref/#state.Text) instance from the given string.
+      */
+      toText(string) {
+          return Text$1.of(string.split(this.facet(EditorState.lineSeparator) || DefaultSplit));
       }
-      else
-          sections.push(len, ins);
-  }
-  function addInsert(values, sections, value) {
-      if (value.length == 0)
-          return;
-      let index = (sections.length - 2) >> 1;
-      if (index < values.length) {
-          values[values.length - 1] = values[values.length - 1].append(value);
+      /**
+      Return the given range of the document as a string.
+      */
+      sliceDoc(from = 0, to = this.doc.length) {
+          return this.doc.sliceString(from, to, this.lineBreak);
       }
-      else {
-          while (values.length < index)
-              values.push(Text$1.empty);
-          values.push(value);
+      /**
+      Get the value of a state [facet](https://codemirror.net/6/docs/ref/#state.Facet).
+      */
+      facet(facet) {
+          let addr = this.config.address[facet.id];
+          if (addr == null)
+              return facet.default;
+          ensureAddr(this, addr);
+          return getAddr(this, addr);
       }
-  }
-  function iterChanges(desc, f, individual) {
-      let inserted = desc.inserted;
-      for (let posA = 0, posB = 0, i = 0; i < desc.sections.length;) {
-          let len = desc.sections[i++], ins = desc.sections[i++];
-          if (ins < 0) {
-              posA += len;
-              posB += len;
-          }
-          else {
-              let endA = posA, endB = posB, text = Text$1.empty;
-              for (;;) {
-                  endA += len;
-                  endB += ins;
-                  if (ins && inserted)
-                      text = text.append(inserted[(i - 2) >> 1]);
-                  if (individual || i == desc.sections.length || desc.sections[i + 1] < 0)
-                      break;
-                  len = desc.sections[i++];
-                  ins = desc.sections[i++];
+      /**
+      Convert this state to a JSON-serializable object. When custom
+      fields should be serialized, you can pass them in as an object
+      mapping property names (in the resulting object, which should
+      not use `doc` or `selection`) to fields.
+      */
+      toJSON(fields) {
+          let result = {
+              doc: this.sliceDoc(),
+              selection: this.selection.toJSON()
+          };
+          if (fields)
+              for (let prop in fields) {
+                  let value = fields[prop];
+                  if (value instanceof StateField && this.config.address[value.id] != null)
+                      result[prop] = value.spec.toJSON(this.field(fields[prop]), this);
               }
-              f(posA, endA, posB, endB, text);
-              posA = endA;
-              posB = endB;
-          }
+          return result;
       }
-  }
-  function mapSet(setA, setB, before, mkSet = false) {
-      // Produce a copy of setA that applies to the document after setB
-      // has been applied (assuming both start at the same document).
-      let sections = [], insert = mkSet ? [] : null;
-      let a = new SectionIter(setA), b = new SectionIter(setB);
-      // Iterate over both sets in parallel. inserted tracks, for changes
-      // in A that have to be processed piece-by-piece, whether their
-      // content has been inserted already, and refers to the section
-      // index.
-      for (let inserted = -1;;) {
-          if (a.ins == -1 && b.ins == -1) {
-              // Move across ranges skipped by both sets.
-              let len = Math.min(a.len, b.len);
-              addSection(sections, len, -1);
-              a.forward(len);
-              b.forward(len);
-          }
-          else if (b.ins >= 0 && (a.ins < 0 || inserted == a.i || a.off == 0 && (b.len < a.len || b.len == a.len && !before))) {
-              // If there's a change in B that comes before the next change in
-              // A (ordered by start pos, then len, then before flag), skip
-              // that (and process any changes in A it covers).
-              let len = b.len;
-              addSection(sections, b.ins, -1);
-              while (len) {
-                  let piece = Math.min(a.len, len);
-                  if (a.ins >= 0 && inserted < a.i && a.len <= piece) {
-                      addSection(sections, 0, a.ins);
-                      if (insert)
-                          addInsert(insert, sections, a.text);
-                      inserted = a.i;
-                  }
-                  a.forward(piece);
-                  len -= piece;
-              }
-              b.next();
-          }
-          else if (a.ins >= 0) {
-              // Process the part of a change in A up to the start of the next
-              // non-deletion change in B (if overlapping).
-              let len = 0, left = a.len;
-              while (left) {
-                  if (b.ins == -1) {
-                      let piece = Math.min(left, b.len);
-                      len += piece;
-                      left -= piece;
-                      b.forward(piece);
-                  }
-                  else if (b.ins == 0 && b.len < left) {
-                      left -= b.len;
-                      b.next();
-                  }
-                  else {
-                      break;
+      /**
+      Deserialize a state from its JSON representation. When custom
+      fields should be deserialized, pass the same object you passed
+      to [`toJSON`](https://codemirror.net/6/docs/ref/#state.EditorState.toJSON) when serializing as
+      third argument.
+      */
+      static fromJSON(json, config = {}, fields) {
+          if (!json || typeof json.doc != "string")
+              throw new RangeError("Invalid JSON representation for EditorState");
+          let fieldInit = [];
+          if (fields)
+              for (let prop in fields) {
+                  if (Object.prototype.hasOwnProperty.call(json, prop)) {
+                      let field = fields[prop], value = json[prop];
+                      fieldInit.push(field.init(state => field.spec.fromJSON(value, state)));
                   }
               }
-              addSection(sections, len, inserted < a.i ? a.ins : 0);
-              if (insert && inserted < a.i)
-                  addInsert(insert, sections, a.text);
-              inserted = a.i;
-              a.forward(a.len - left);
-          }
-          else if (a.done && b.done) {
-              return insert ? ChangeSet.createSet(sections, insert) : ChangeDesc.create(sections);
-          }
-          else {
-              throw new Error("Mismatched change set lengths");
-          }
+          return EditorState.create({
+              doc: json.doc,
+              selection: EditorSelection.fromJSON(json.selection),
+              extensions: config.extensions ? fieldInit.concat([config.extensions]) : fieldInit
+          });
       }
-  }
-  function composeSets(setA, setB, mkSet = false) {
-      let sections = [];
-      let insert = mkSet ? [] : null;
-      let a = new SectionIter(setA), b = new SectionIter(setB);
-      for (let open = false;;) {
-          if (a.done && b.done) {
-              return insert ? ChangeSet.createSet(sections, insert) : ChangeDesc.create(sections);
-          }
-          else if (a.ins == 0) { // Deletion in A
-              addSection(sections, a.len, 0, open);
-              a.next();
-          }
-          else if (b.len == 0 && !b.done) { // Insertion in B
-              addSection(sections, 0, b.ins, open);
-              if (insert)
-                  addInsert(insert, sections, b.text);
-              b.next();
-          }
-          else if (a.done || b.done) {
-              throw new Error("Mismatched change set lengths");
-          }
-          else {
-              let len = Math.min(a.len2, b.len), sectionLen = sections.length;
-              if (a.ins == -1) {
-                  let insB = b.ins == -1 ? -1 : b.off ? 0 : b.ins;
-                  addSection(sections, len, insB, open);
-                  if (insert && insB)
-                      addInsert(insert, sections, b.text);
-              }
-              else if (b.ins == -1) {
-                  addSection(sections, a.off ? 0 : a.len, len, open);
-                  if (insert)
-                      addInsert(insert, sections, a.textBit(len));
-              }
-              else {
-                  addSection(sections, a.off ? 0 : a.len, b.off ? 0 : b.ins, open);
-                  if (insert && !b.off)
-                      addInsert(insert, sections, b.text);
-              }
-              open = (a.ins > len || b.ins >= 0 && b.len > len) && (open || sections.length > sectionLen);
-              a.forward2(len);
-              b.forward(len);
-          }
-      }
-  }
-  class SectionIter {
-      constructor(set) {
-          this.set = set;
-          this.i = 0;
-          this.next();
-      }
-      next() {
-          let { sections } = this.set;
-          if (this.i < sections.length) {
-              this.len = sections[this.i++];
-              this.ins = sections[this.i++];
-          }
-          else {
-              this.len = 0;
-              this.ins = -2;
-          }
-          this.off = 0;
-      }
-      get done() { return this.ins == -2; }
-      get len2() { return this.ins < 0 ? this.len : this.ins; }
-      get text() {
-          let { inserted } = this.set, index = (this.i - 2) >> 1;
-          return index >= inserted.length ? Text$1.empty : inserted[index];
-      }
-      textBit(len) {
-          let { inserted } = this.set, index = (this.i - 2) >> 1;
-          return index >= inserted.length && !len ? Text$1.empty
-              : inserted[index].slice(this.off, len == null ? undefined : this.off + len);
-      }
-      forward(len) {
-          if (len == this.len)
-              this.next();
-          else {
-              this.len -= len;
-              this.off += len;
-          }
-      }
-      forward2(len) {
-          if (this.ins == -1)
-              this.forward(len);
-          else if (len == this.ins)
-              this.next();
-          else {
-              this.ins -= len;
-              this.off += len;
-          }
-      }
-  }
-
-  /**
-  A single selection range. When
-  [`allowMultipleSelections`](https://codemirror.net/6/docs/ref/#state.EditorState^allowMultipleSelections)
-  is enabled, a [selection](https://codemirror.net/6/docs/ref/#state.EditorSelection) may hold
-  multiple ranges. By default, selections hold exactly one range.
-  */
-  class SelectionRange {
-      constructor(
-      /**
-      The lower boundary of the range.
-      */
-      from, 
       /**
-      The upper boundary of the range.
+      Create a new state. You'll usually only need this when
+      initializing an editor—updated states are created by applying
+      transactions.
       */
-      to, flags) {
-          this.from = from;
-          this.to = to;
-          this.flags = flags;
+      static create(config = {}) {
+          let configuration = Configuration.resolve(config.extensions || [], new Map);
+          let doc = config.doc instanceof Text$1 ? config.doc
+              : Text$1.of((config.doc || "").split(configuration.staticFacet(EditorState.lineSeparator) || DefaultSplit));
+          let selection = !config.selection ? EditorSelection.single(0)
+              : config.selection instanceof EditorSelection ? config.selection
+                  : EditorSelection.single(config.selection.anchor, config.selection.head);
+          checkSelection(selection, doc.length);
+          if (!configuration.staticFacet(allowMultipleSelections))
+              selection = selection.asSingle();
+          return new EditorState(configuration, doc, selection, configuration.dynamicSlots.map(() => null), (state, slot) => slot.create(state), null);
       }
       /**
-      The anchor of the range—the side that doesn't move when you
-      extend it.
+      The size (in columns) of a tab in the document, determined by
+      the [`tabSize`](https://codemirror.net/6/docs/ref/#state.EditorState^tabSize) facet.
       */
-      get anchor() { return this.flags & 16 /* RangeFlag.Inverted */ ? this.to : this.from; }
+      get tabSize() { return this.facet(EditorState.tabSize); }
       /**
-      The head of the range, which is moved when the range is
-      [extended](https://codemirror.net/6/docs/ref/#state.SelectionRange.extend).
+      Get the proper [line-break](https://codemirror.net/6/docs/ref/#state.EditorState^lineSeparator)
+      string for this state.
       */
-      get head() { return this.flags & 16 /* RangeFlag.Inverted */ ? this.from : this.to; }
+      get lineBreak() { return this.facet(EditorState.lineSeparator) || "\n"; }
       /**
-      True when `anchor` and `head` are at the same position.
+      Returns true when the editor is
+      [configured](https://codemirror.net/6/docs/ref/#state.EditorState^readOnly) to be read-only.
       */
-      get empty() { return this.from == this.to; }
+      get readOnly() { return this.facet(readOnly); }
       /**
-      If this is a cursor that is explicitly associated with the
-      character on one of its sides, this returns the side. -1 means
-      the character before its position, 1 the character after, and 0
-      means no association.
+      Look up a translation for the given phrase (via the
+      [`phrases`](https://codemirror.net/6/docs/ref/#state.EditorState^phrases) facet), or return the
+      original string if no translation is found.
+      
+      If additional arguments are passed, they will be inserted in
+      place of markers like `$1` (for the first value) and `$2`, etc.
+      A single `$` is equivalent to `$1`, and `$$` will produce a
+      literal dollar sign.
       */
-      get assoc() { return this.flags & 4 /* RangeFlag.AssocBefore */ ? -1 : this.flags & 8 /* RangeFlag.AssocAfter */ ? 1 : 0; }
+      phrase(phrase, ...insert) {
+          for (let map of this.facet(EditorState.phrases))
+              if (Object.prototype.hasOwnProperty.call(map, phrase)) {
+                  phrase = map[phrase];
+                  break;
+              }
+          if (insert.length)
+              phrase = phrase.replace(/\$(\$|\d*)/g, (m, i) => {
+                  if (i == "$")
+                      return "$";
+                  let n = +(i || 1);
+                  return !n || n > insert.length ? m : insert[n - 1];
+              });
+          return phrase;
+      }
       /**
-      The bidirectional text level associated with this cursor, if
-      any.
+      Find the values for a given language data field, provided by the
+      the [`languageData`](https://codemirror.net/6/docs/ref/#state.EditorState^languageData) facet.
+      
+      Examples of language data fields are...
+      
+      - [`"commentTokens"`](https://codemirror.net/6/docs/ref/#commands.CommentTokens) for specifying
+        comment syntax.
+      - [`"autocomplete"`](https://codemirror.net/6/docs/ref/#autocomplete.autocompletion^config.override)
+        for providing language-specific completion sources.
+      - [`"wordChars"`](https://codemirror.net/6/docs/ref/#state.EditorState.charCategorizer) for adding
+        characters that should be considered part of words in this
+        language.
+      - [`"closeBrackets"`](https://codemirror.net/6/docs/ref/#autocomplete.CloseBracketConfig) controls
+        bracket closing behavior.
       */
-      get bidiLevel() {
-          let level = this.flags & 3 /* RangeFlag.BidiLevelMask */;
-          return level == 3 ? null : level;
+      languageDataAt(name, pos, side = -1) {
+          let values = [];
+          for (let provider of this.facet(languageData)) {
+              for (let result of provider(this, pos, side)) {
+                  if (Object.prototype.hasOwnProperty.call(result, name))
+                      values.push(result[name]);
+              }
+          }
+          return values;
       }
       /**
-      The goal column (stored vertical offset) associated with a
-      cursor. This is used to preserve the vertical position when
-      [moving](https://codemirror.net/6/docs/ref/#view.EditorView.moveVertically) across
-      lines of different length.
+      Return a function that can categorize strings (expected to
+      represent a single [grapheme cluster](https://codemirror.net/6/docs/ref/#state.findClusterBreak))
+      into one of:
+      
+       - Word (contains an alphanumeric character or a character
+         explicitly listed in the local language's `"wordChars"`
+         language data, which should be a string)
+       - Space (contains only whitespace)
+       - Other (anything else)
       */
-      get goalColumn() {
-          let value = this.flags >> 5 /* RangeFlag.GoalColumnOffset */;
-          return value == 33554431 /* RangeFlag.NoGoalColumn */ ? undefined : value;
+      charCategorizer(at) {
+          return makeCategorizer(this.languageDataAt("wordChars", at).join(""));
       }
       /**
-      Map this range through a change, producing a valid range in the
-      updated document.
+      Find the word at the given position, meaning the range
+      containing all [word](https://codemirror.net/6/docs/ref/#state.CharCategory.Word) characters
+      around it. If no word characters are adjacent to the position,
+      this returns null.
       */
-      map(change, assoc = -1) {
-          let from, to;
-          if (this.empty) {
-              from = to = change.mapPos(this.from, assoc);
+      wordAt(pos) {
+          let { text, from, length } = this.doc.lineAt(pos);
+          let cat = this.charCategorizer(pos);
+          let start = pos - from, end = pos - from;
+          while (start > 0) {
+              let prev = findClusterBreak(text, start, false);
+              if (cat(text.slice(prev, start)) != CharCategory.Word)
+                  break;
+              start = prev;
           }
-          else {
-              from = change.mapPos(this.from, 1);
-              to = change.mapPos(this.to, -1);
+          while (end < length) {
+              let next = findClusterBreak(text, end);
+              if (cat(text.slice(end, next)) != CharCategory.Word)
+                  break;
+              end = next;
           }
-          return from == this.from && to == this.to ? this : new SelectionRange(from, to, this.flags);
+          return start == end ? null : EditorSelection.range(start + from, end + from);
+      }
+  }
+  /**
+  A facet that, when enabled, causes the editor to allow multiple
+  ranges to be selected. Be careful though, because by default the
+  editor relies on the native DOM selection, which cannot handle
+  multiple selections. An extension like
+  [`drawSelection`](https://codemirror.net/6/docs/ref/#view.drawSelection) can be used to make
+  secondary selections visible to the user.
+  */
+  EditorState.allowMultipleSelections = allowMultipleSelections;
+  /**
+  Configures the tab size to use in this state. The first
+  (highest-precedence) value of the facet is used. If no value is
+  given, this defaults to 4.
+  */
+  EditorState.tabSize = /*@__PURE__*/Facet.define({
+      combine: values => values.length ? values[0] : 4
+  });
+  /**
+  The line separator to use. By default, any of `"\n"`, `"\r\n"`
+  and `"\r"` is treated as a separator when splitting lines, and
+  lines are joined with `"\n"`.
+
+  When you configure a value here, only that precise separator
+  will be used, allowing you to round-trip documents through the
+  editor without normalizing line separators.
+  */
+  EditorState.lineSeparator = lineSeparator;
+  /**
+  This facet controls the value of the
+  [`readOnly`](https://codemirror.net/6/docs/ref/#state.EditorState.readOnly) getter, which is
+  consulted by commands and extensions that implement editing
+  functionality to determine whether they should apply. It
+  defaults to false, but when its highest-precedence value is
+  `true`, such functionality disables itself.
+
+  Not to be confused with
+  [`EditorView.editable`](https://codemirror.net/6/docs/ref/#view.EditorView^editable), which
+  controls whether the editor's DOM is set to be editable (and
+  thus focusable).
+  */
+  EditorState.readOnly = readOnly;
+  /**
+  Registers translation phrases. The
+  [`phrase`](https://codemirror.net/6/docs/ref/#state.EditorState.phrase) method will look through
+  all objects registered with this facet to find translations for
+  its argument.
+  */
+  EditorState.phrases = /*@__PURE__*/Facet.define({
+      compare(a, b) {
+          let kA = Object.keys(a), kB = Object.keys(b);
+          return kA.length == kB.length && kA.every(k => a[k] == b[k]);
       }
+  });
+  /**
+  A facet used to register [language
+  data](https://codemirror.net/6/docs/ref/#state.EditorState.languageDataAt) providers.
+  */
+  EditorState.languageData = languageData;
+  /**
+  Facet used to register change filters, which are called for each
+  transaction (unless explicitly
+  [disabled](https://codemirror.net/6/docs/ref/#state.TransactionSpec.filter)), and can suppress
+  part of the transaction's changes.
+
+  Such a function can return `true` to indicate that it doesn't
+  want to do anything, `false` to completely stop the changes in
+  the transaction, or a set of ranges in which changes should be
+  suppressed. Such ranges are represented as an array of numbers,
+  with each pair of two numbers indicating the start and end of a
+  range. So for example `[10, 20, 100, 110]` suppresses changes
+  between 10 and 20, and between 100 and 110.
+  */
+  EditorState.changeFilter = changeFilter;
+  /**
+  Facet used to register a hook that gets a chance to update or
+  replace transaction specs before they are applied. This will
+  only be applied for transactions that don't have
+  [`filter`](https://codemirror.net/6/docs/ref/#state.TransactionSpec.filter) set to `false`. You
+  can either return a single transaction spec (possibly the input
+  transaction), or an array of specs (which will be combined in
+  the same way as the arguments to
+  [`EditorState.update`](https://codemirror.net/6/docs/ref/#state.EditorState.update)).
+
+  When possible, it is recommended to avoid accessing
+  [`Transaction.state`](https://codemirror.net/6/docs/ref/#state.Transaction.state) in a filter,
+  since it will force creation of a state that will then be
+  discarded again, if the transaction is actually filtered.
+
+  (This functionality should be used with care. Indiscriminately
+  modifying transaction is likely to break something or degrade
+  the user experience.)
+  */
+  EditorState.transactionFilter = transactionFilter;
+  /**
+  This is a more limited form of
+  [`transactionFilter`](https://codemirror.net/6/docs/ref/#state.EditorState^transactionFilter),
+  which can only add
+  [annotations](https://codemirror.net/6/docs/ref/#state.TransactionSpec.annotations) and
+  [effects](https://codemirror.net/6/docs/ref/#state.TransactionSpec.effects). _But_, this type
+  of filter runs even if the transaction has disabled regular
+  [filtering](https://codemirror.net/6/docs/ref/#state.TransactionSpec.filter), making it suitable
+  for effects that don't need to touch the changes or selection,
+  but do want to process every transaction.
+
+  Extenders run _after_ filters, when both are present.
+  */
+  EditorState.transactionExtender = transactionExtender;
+  Compartment.reconfigure = /*@__PURE__*/StateEffect.define();
+
+  /**
+  Utility function for combining behaviors to fill in a config
+  object from an array of provided configs. `defaults` should hold
+  default values for all optional fields in `Config`.
+
+  The function will, by default, error
+  when a field gets two values that aren't `===`-equal, but you can
+  provide combine functions per field to do something else.
+  */
+  function combineConfig(configs, defaults, // Should hold only the optional properties of Config, but I haven't managed to express that
+  combine = {}) {
+      let result = {};
+      for (let config of configs)
+          for (let key of Object.keys(config)) {
+              let value = config[key], current = result[key];
+              if (current === undefined)
+                  result[key] = value;
+              else if (current === value || value === undefined) ; // No conflict
+              else if (Object.hasOwnProperty.call(combine, key))
+                  result[key] = combine[key](current, value);
+              else
+                  throw new Error("Config merge conflict for field " + key);
+          }
+      for (let key in defaults)
+          if (result[key] === undefined)
+              result[key] = defaults[key];
+      return result;
+  }
+
+  /**
+  Each range is associated with a value, which must inherit from
+  this class.
+  */
+  class RangeValue {
       /**
-      Extend this range to cover at least `from` to `to`.
+      Compare this value with another value. Used when comparing
+      rangesets. The default implementation compares by identity.
+      Unless you are only creating a fixed number of unique instances
+      of your value type, it is a good idea to implement this
+      properly.
       */
-      extend(from, to = from) {
-          if (from <= this.anchor && to >= this.anchor)
-              return EditorSelection.range(from, to);
-          let head = Math.abs(from - this.anchor) > Math.abs(to - this.anchor) ? from : to;
-          return EditorSelection.range(this.anchor, head);
-      }
+      eq(other) { return this == other; }
       /**
-      Compare this range to another range.
+      Create a [range](https://codemirror.net/6/docs/ref/#state.Range) with this value.
       */
-      eq(other) {
-          return this.anchor == other.anchor && this.head == other.head;
-      }
+      range(from, to = from) { return Range.create(from, to, this); }
+  }
+  RangeValue.prototype.startSide = RangeValue.prototype.endSide = 0;
+  RangeValue.prototype.point = false;
+  RangeValue.prototype.mapMode = MapMode.TrackDel;
+  /**
+  A range associates a value with a range of positions.
+  */
+  class Range {
+      constructor(
       /**
-      Return a JSON-serializable object representing the range.
+      The range's start position.
       */
-      toJSON() { return { anchor: this.anchor, head: this.head }; }
+      from, 
       /**
-      Convert a JSON representation of a range to a `SelectionRange`
-      instance.
+      Its end position.
       */
-      static fromJSON(json) {
-          if (!json || typeof json.anchor != "number" || typeof json.head != "number")
-              throw new RangeError("Invalid JSON representation for SelectionRange");
-          return EditorSelection.range(json.anchor, json.head);
+      to, 
+      /**
+      The value associated with this range.
+      */
+      value) {
+          this.from = from;
+          this.to = to;
+          this.value = value;
       }
       /**
       @internal
       */
-      static create(from, to, flags) {
-          return new SelectionRange(from, to, flags);
+      static create(from, to, value) {
+          return new Range(from, to, value);
+      }
+  }
+  function cmpRange(a, b) {
+      return a.from - b.from || a.value.startSide - b.value.startSide;
+  }
+  class Chunk {
+      constructor(from, to, value, 
+      // Chunks are marked with the largest point that occurs
+      // in them (or -1 for no points), so that scans that are
+      // only interested in points (such as the
+      // heightmap-related logic) can skip range-only chunks.
+      maxPoint) {
+          this.from = from;
+          this.to = to;
+          this.value = value;
+          this.maxPoint = maxPoint;
+      }
+      get length() { return this.to[this.to.length - 1]; }
+      // Find the index of the given position and side. Use the ranges'
+      // `from` pos when `end == false`, `to` when `end == true`.
+      findIndex(pos, side, end, startAt = 0) {
+          let arr = end ? this.to : this.from;
+          for (let lo = startAt, hi = arr.length;;) {
+              if (lo == hi)
+                  return lo;
+              let mid = (lo + hi) >> 1;
+              let diff = arr[mid] - pos || (end ? this.value[mid].endSide : this.value[mid].startSide) - side;
+              if (mid == lo)
+                  return diff >= 0 ? lo : hi;
+              if (diff >= 0)
+                  hi = mid;
+              else
+                  lo = mid + 1;
+          }
+      }
+      between(offset, from, to, f) {
+          for (let i = this.findIndex(from, -1000000000 /* C.Far */, true), e = this.findIndex(to, 1000000000 /* C.Far */, false, i); i < e; i++)
+              if (f(this.from[i] + offset, this.to[i] + offset, this.value[i]) === false)
+                  return false;
+      }
+      map(offset, changes) {
+          let value = [], from = [], to = [], newPos = -1, maxPoint = -1;
+          for (let i = 0; i < this.value.length; i++) {
+              let val = this.value[i], curFrom = this.from[i] + offset, curTo = this.to[i] + offset, newFrom, newTo;
+              if (curFrom == curTo) {
+                  let mapped = changes.mapPos(curFrom, val.startSide, val.mapMode);
+                  if (mapped == null)
+                      continue;
+                  newFrom = newTo = mapped;
+                  if (val.startSide != val.endSide) {
+                      newTo = changes.mapPos(curFrom, val.endSide);
+                      if (newTo < newFrom)
+                          continue;
+                  }
+              }
+              else {
+                  newFrom = changes.mapPos(curFrom, val.startSide);
+                  newTo = changes.mapPos(curTo, val.endSide);
+                  if (newFrom > newTo || newFrom == newTo && val.startSide > 0 && val.endSide <= 0)
+                      continue;
+              }
+              if ((newTo - newFrom || val.endSide - val.startSide) < 0)
+                  continue;
+              if (newPos < 0)
+                  newPos = newFrom;
+              if (val.point)
+                  maxPoint = Math.max(maxPoint, newTo - newFrom);
+              value.push(val);
+              from.push(newFrom - newPos);
+              to.push(newTo - newPos);
+          }
+          return { mapped: value.length ? new Chunk(from, to, value, maxPoint) : null, pos: newPos };
       }
   }
   /**
-  An editor selection holds one or more selection ranges.
+  A range set stores a collection of [ranges](https://codemirror.net/6/docs/ref/#state.Range) in a
+  way that makes them efficient to [map](https://codemirror.net/6/docs/ref/#state.RangeSet.map) and
+  [update](https://codemirror.net/6/docs/ref/#state.RangeSet.update). This is an immutable data
+  structure.
   */
-  class EditorSelection {
+  class RangeSet {
       constructor(
       /**
-      The ranges in the selection, sorted by position. Ranges cannot
-      overlap (but they may touch, if they aren't empty).
+      @internal
       */
-      ranges, 
+      chunkPos, 
       /**
-      The index of the _main_ range in the selection (which is
-      usually the range that was added last).
+      @internal
       */
-      mainIndex) {
-          this.ranges = ranges;
-          this.mainIndex = mainIndex;
-      }
+      chunk, 
       /**
-      Map a selection through a change. Used to adjust the selection
-      position for changes.
+      @internal
       */
-      map(change, assoc = -1) {
-          if (change.empty)
-              return this;
-          return EditorSelection.create(this.ranges.map(r => r.map(change, assoc)), this.mainIndex);
-      }
+      nextLayer, 
       /**
-      Compare this selection to another selection.
+      @internal
       */
-      eq(other) {
-          if (this.ranges.length != other.ranges.length ||
-              this.mainIndex != other.mainIndex)
-              return false;
-          for (let i = 0; i < this.ranges.length; i++)
-              if (!this.ranges[i].eq(other.ranges[i]))
-                  return false;
-          return true;
+      maxPoint) {
+          this.chunkPos = chunkPos;
+          this.chunk = chunk;
+          this.nextLayer = nextLayer;
+          this.maxPoint = maxPoint;
       }
       /**
-      Get the primary selection range. Usually, you should make sure
-      your code applies to _all_ ranges, by using methods like
-      [`changeByRange`](https://codemirror.net/6/docs/ref/#state.EditorState.changeByRange).
-      */
-      get main() { return this.ranges[this.mainIndex]; }
-      /**
-      Make sure the selection only has one range. Returns a selection
-      holding only the main range from this selection.
+      @internal
       */
-      asSingle() {
-          return this.ranges.length == 1 ? this : new EditorSelection([this.main], 0);
+      static create(chunkPos, chunk, nextLayer, maxPoint) {
+          return new RangeSet(chunkPos, chunk, nextLayer, maxPoint);
       }
       /**
-      Extend this selection with an extra range.
+      @internal
       */
-      addRange(range, main = true) {
-          return EditorSelection.create([range].concat(this.ranges), main ? 0 : this.mainIndex + 1);
+      get length() {
+          let last = this.chunk.length - 1;
+          return last < 0 ? 0 : Math.max(this.chunkEnd(last), this.nextLayer.length);
       }
       /**
-      Replace a given range with another range, and then normalize the
-      selection to merge and sort ranges if necessary.
+      The number of ranges in the set.
       */
-      replaceRange(range, which = this.mainIndex) {
-          let ranges = this.ranges.slice();
-          ranges[which] = range;
-          return EditorSelection.create(ranges, this.mainIndex);
+      get size() {
+          if (this.isEmpty)
+              return 0;
+          let size = this.nextLayer.size;
+          for (let chunk of this.chunk)
+              size += chunk.value.length;
+          return size;
       }
       /**
-      Convert this selection to an object that can be serialized to
-      JSON.
+      @internal
       */
-      toJSON() {
-          return { ranges: this.ranges.map(r => r.toJSON()), main: this.mainIndex };
+      chunkEnd(index) {
+          return this.chunkPos[index] + this.chunk[index].length;
       }
       /**
-      Create a selection from a JSON representation.
+      Update the range set, optionally adding new ranges or filtering
+      out existing ones.
+      
+      (Note: The type parameter is just there as a kludge to work
+      around TypeScript variance issues that prevented `RangeSet<X>`
+      from being a subtype of `RangeSet<Y>` when `X` is a subtype of
+      `Y`.)
       */
-      static fromJSON(json) {
-          if (!json || !Array.isArray(json.ranges) || typeof json.main != "number" || json.main >= json.ranges.length)
-              throw new RangeError("Invalid JSON representation for EditorSelection");
-          return new EditorSelection(json.ranges.map((r) => SelectionRange.fromJSON(r)), json.main);
+      update(updateSpec) {
+          let { add = [], sort = false, filterFrom = 0, filterTo = this.length } = updateSpec;
+          let filter = updateSpec.filter;
+          if (add.length == 0 && !filter)
+              return this;
+          if (sort)
+              add = add.slice().sort(cmpRange);
+          if (this.isEmpty)
+              return add.length ? RangeSet.of(add) : this;
+          let cur = new LayerCursor(this, null, -1).goto(0), i = 0, spill = [];
+          let builder = new RangeSetBuilder();
+          while (cur.value || i < add.length) {
+              if (i < add.length && (cur.from - add[i].from || cur.startSide - add[i].value.startSide) >= 0) {
+                  let range = add[i++];
+                  if (!builder.addInner(range.from, range.to, range.value))
+                      spill.push(range);
+              }
+              else if (cur.rangeIndex == 1 && cur.chunkIndex < this.chunk.length &&
+                  (i == add.length || this.chunkEnd(cur.chunkIndex) < add[i].from) &&
+                  (!filter || filterFrom > this.chunkEnd(cur.chunkIndex) || filterTo < this.chunkPos[cur.chunkIndex]) &&
+                  builder.addChunk(this.chunkPos[cur.chunkIndex], this.chunk[cur.chunkIndex])) {
+                  cur.nextChunk();
+              }
+              else {
+                  if (!filter || filterFrom > cur.to || filterTo < cur.from || filter(cur.from, cur.to, cur.value)) {
+                      if (!builder.addInner(cur.from, cur.to, cur.value))
+                          spill.push(Range.create(cur.from, cur.to, cur.value));
+                  }
+                  cur.next();
+              }
+          }
+          return builder.finishInner(this.nextLayer.isEmpty && !spill.length ? RangeSet.empty
+              : this.nextLayer.update({ add: spill, filter, filterFrom, filterTo }));
       }
       /**
-      Create a selection holding a single range.
+      Map this range set through a set of changes, return the new set.
       */
-      static single(anchor, head = anchor) {
-          return new EditorSelection([EditorSelection.range(anchor, head)], 0);
+      map(changes) {
+          if (changes.empty || this.isEmpty)
+              return this;
+          let chunks = [], chunkPos = [], maxPoint = -1;
+          for (let i = 0; i < this.chunk.length; i++) {
+              let start = this.chunkPos[i], chunk = this.chunk[i];
+              let touch = changes.touchesRange(start, start + chunk.length);
+              if (touch === false) {
+                  maxPoint = Math.max(maxPoint, chunk.maxPoint);
+                  chunks.push(chunk);
+                  chunkPos.push(changes.mapPos(start));
+              }
+              else if (touch === true) {
+                  let { mapped, pos } = chunk.map(start, changes);
+                  if (mapped) {
+                      maxPoint = Math.max(maxPoint, mapped.maxPoint);
+                      chunks.push(mapped);
+                      chunkPos.push(pos);
+                  }
+              }
+          }
+          let next = this.nextLayer.map(changes);
+          return chunks.length == 0 ? next : new RangeSet(chunkPos, chunks, next || RangeSet.empty, maxPoint);
       }
       /**
-      Sort and merge the given set of ranges, creating a valid
-      selection.
+      Iterate over the ranges that touch the region `from` to `to`,
+      calling `f` for each. There is no guarantee that the ranges will
+      be reported in any specific order. When the callback returns
+      `false`, iteration stops.
       */
-      static create(ranges, mainIndex = 0) {
-          if (ranges.length == 0)
-              throw new RangeError("A selection needs at least one range");
-          for (let pos = 0, i = 0; i < ranges.length; i++) {
-              let range = ranges[i];
-              if (range.empty ? range.from <= pos : range.from < pos)
-                  return EditorSelection.normalized(ranges.slice(), mainIndex);
-              pos = range.to;
+      between(from, to, f) {
+          if (this.isEmpty)
+              return;
+          for (let i = 0; i < this.chunk.length; i++) {
+              let start = this.chunkPos[i], chunk = this.chunk[i];
+              if (to >= start && from <= start + chunk.length &&
+                  chunk.between(start, from - start, to - start, f) === false)
+                  return;
           }
-          return new EditorSelection(ranges, mainIndex);
+          this.nextLayer.between(from, to, f);
       }
       /**
-      Create a cursor selection range at the given position. You can
-      safely ignore the optional arguments in most situations.
+      Iterate over the ranges in this set, in order, including all
+      ranges that end at or after `from`.
       */
-      static cursor(pos, assoc = 0, bidiLevel, goalColumn) {
-          return SelectionRange.create(pos, pos, (assoc == 0 ? 0 : assoc < 0 ? 4 /* RangeFlag.AssocBefore */ : 8 /* RangeFlag.AssocAfter */) |
-              (bidiLevel == null ? 3 : Math.min(2, bidiLevel)) |
-              ((goalColumn !== null && goalColumn !== void 0 ? goalColumn : 33554431 /* RangeFlag.NoGoalColumn */) << 5 /* RangeFlag.GoalColumnOffset */));
+      iter(from = 0) {
+          return HeapCursor.from([this]).goto(from);
       }
       /**
-      Create a selection range.
+      @internal
       */
-      static range(anchor, head, goalColumn) {
-          let goal = (goalColumn !== null && goalColumn !== void 0 ? goalColumn : 33554431 /* RangeFlag.NoGoalColumn */) << 5 /* RangeFlag.GoalColumnOffset */;
-          return head < anchor ? SelectionRange.create(head, anchor, 16 /* RangeFlag.Inverted */ | goal | 8 /* RangeFlag.AssocAfter */)
-              : SelectionRange.create(anchor, head, goal | (head > anchor ? 4 /* RangeFlag.AssocBefore */ : 0));
-      }
+      get isEmpty() { return this.nextLayer == this; }
       /**
-      @internal
+      Iterate over the ranges in a collection of sets, in order,
+      starting from `from`.
       */
-      static normalized(ranges, mainIndex = 0) {
-          let main = ranges[mainIndex];
-          ranges.sort((a, b) => a.from - b.from);
-          mainIndex = ranges.indexOf(main);
-          for (let i = 1; i < ranges.length; i++) {
-              let range = ranges[i], prev = ranges[i - 1];
-              if (range.empty ? range.from <= prev.to : range.from < prev.to) {
-                  let from = prev.from, to = Math.max(range.to, prev.to);
-                  if (i <= mainIndex)
-                      mainIndex--;
-                  ranges.splice(--i, 2, range.anchor > range.head ? EditorSelection.range(to, from) : EditorSelection.range(from, to));
-              }
-          }
-          return new EditorSelection(ranges, mainIndex);
+      static iter(sets, from = 0) {
+          return HeapCursor.from(sets).goto(from);
       }
-  }
-  function checkSelection(selection, docLength) {
-      for (let range of selection.ranges)
-          if (range.to > docLength)
-              throw new RangeError("Selection points outside of document");
-  }
-
-  let nextID = 0;
-  /**
-  A facet is a labeled value that is associated with an editor
-  state. It takes inputs from any number of extensions, and combines
-  those into a single output value.
-
-  Examples of uses of facets are the [tab
-  size](https://codemirror.net/6/docs/ref/#state.EditorState^tabSize), [editor
-  attributes](https://codemirror.net/6/docs/ref/#view.EditorView^editorAttributes), and [update
-  listeners](https://codemirror.net/6/docs/ref/#view.EditorView^updateListener).
-  */
-  class Facet {
-      constructor(
       /**
-      @internal
+      Iterate over two groups of sets, calling methods on `comparator`
+      to notify it of possible differences.
       */
-      combine, 
+      static compare(oldSets, newSets, 
       /**
-      @internal
+      This indicates how the underlying data changed between these
+      ranges, and is needed to synchronize the iteration.
       */
-      compareInput, 
+      textDiff, comparator, 
       /**
-      @internal
+      Can be used to ignore all non-point ranges, and points below
+      the given size. When -1, all ranges are compared.
       */
-      compare, isStatic, enables) {
-          this.combine = combine;
-          this.compareInput = compareInput;
-          this.compare = compare;
-          this.isStatic = isStatic;
-          /**
-          @internal
-          */
-          this.id = nextID++;
-          this.default = combine([]);
-          this.extensions = typeof enables == "function" ? enables(this) : enables;
+      minPointSize = -1) {
+          let a = oldSets.filter(set => set.maxPoint > 0 || !set.isEmpty && set.maxPoint >= minPointSize);
+          let b = newSets.filter(set => set.maxPoint > 0 || !set.isEmpty && set.maxPoint >= minPointSize);
+          let sharedChunks = findSharedChunks(a, b, textDiff);
+          let sideA = new SpanCursor(a, sharedChunks, minPointSize);
+          let sideB = new SpanCursor(b, sharedChunks, minPointSize);
+          textDiff.iterGaps((fromA, fromB, length) => compare(sideA, fromA, sideB, fromB, length, comparator));
+          if (textDiff.empty && textDiff.length == 0)
+              compare(sideA, 0, sideB, 0, 0, comparator);
       }
       /**
-      Define a new facet.
+      Compare the contents of two groups of range sets, returning true
+      if they are equivalent in the given range.
       */
-      static define(config = {}) {
-          return new Facet(config.combine || ((a) => a), config.compareInput || ((a, b) => a === b), config.compare || (!config.combine ? sameArray : (a, b) => a === b), !!config.static, config.enables);
+      static eq(oldSets, newSets, from = 0, to) {
+          if (to == null)
+              to = 1000000000 /* C.Far */ - 1;
+          let a = oldSets.filter(set => !set.isEmpty && newSets.indexOf(set) < 0);
+          let b = newSets.filter(set => !set.isEmpty && oldSets.indexOf(set) < 0);
+          if (a.length != b.length)
+              return false;
+          if (!a.length)
+              return true;
+          let sharedChunks = findSharedChunks(a, b);
+          let sideA = new SpanCursor(a, sharedChunks, 0).goto(from), sideB = new SpanCursor(b, sharedChunks, 0).goto(from);
+          for (;;) {
+              if (sideA.to != sideB.to ||
+                  !sameValues(sideA.active, sideB.active) ||
+                  sideA.point && (!sideB.point || !sideA.point.eq(sideB.point)))
+                  return false;
+              if (sideA.to > to)
+                  return true;
+              sideA.next();
+              sideB.next();
+          }
       }
       /**
-      Returns an extension that adds the given value to this facet.
+      Iterate over a group of range sets at the same time, notifying
+      the iterator about the ranges covering every given piece of
+      content. Returns the open count (see
+      [`SpanIterator.span`](https://codemirror.net/6/docs/ref/#state.SpanIterator.span)) at the end
+      of the iteration.
       */
-      of(value) {
-          return new FacetProvider([], this, 0 /* Provider.Static */, value);
-      }
+      static spans(sets, from, to, iterator, 
       /**
-      Create an extension that computes a value for the facet from a
-      state. You must take care to declare the parts of the state that
-      this value depends on, since your function is only called again
-      for a new state when one of those parts changed.
-      
-      In cases where your value depends only on a single field, you'll
-      want to use the [`from`](https://codemirror.net/6/docs/ref/#state.Facet.from) method instead.
+      When given and greater than -1, only points of at least this
+      size are taken into account.
       */
-      compute(deps, get) {
-          if (this.isStatic)
-              throw new Error("Can't compute a static facet");
-          return new FacetProvider(deps, this, 1 /* Provider.Single */, get);
+      minPointSize = -1) {
+          let cursor = new SpanCursor(sets, null, minPointSize).goto(from), pos = from;
+          let openRanges = cursor.openStart;
+          for (;;) {
+              let curTo = Math.min(cursor.to, to);
+              if (cursor.point) {
+                  let active = cursor.activeForPoint(cursor.to);
+                  let openCount = cursor.pointFrom < from ? active.length + 1 : Math.min(active.length, openRanges);
+                  iterator.point(pos, curTo, cursor.point, active, openCount, cursor.pointRank);
+                  openRanges = Math.min(cursor.openEnd(curTo), active.length);
+              }
+              else if (curTo > pos) {
+                  iterator.span(pos, curTo, cursor.active, openRanges);
+                  openRanges = cursor.openEnd(curTo);
+              }
+              if (cursor.to > to)
+                  return openRanges + (cursor.point && cursor.to > to ? 1 : 0);
+              pos = cursor.to;
+              cursor.next();
+          }
       }
       /**
-      Create an extension that computes zero or more values for this
-      facet from a state.
+      Create a range set for the given range or array of ranges. By
+      default, this expects the ranges to be _sorted_ (by start
+      position and, if two start at the same position,
+      `value.startSide`). You can pass `true` as second argument to
+      cause the method to sort them.
       */
-      computeN(deps, get) {
-          if (this.isStatic)
-              throw new Error("Can't compute a static facet");
-          return new FacetProvider(deps, this, 2 /* Provider.Multi */, get);
-      }
-      from(field, get) {
-          if (!get)
-              get = x => x;
-          return this.compute([field], state => get(state.field(field)));
-      }
-  }
-  function sameArray(a, b) {
-      return a == b || a.length == b.length && a.every((e, i) => e === b[i]);
-  }
-  class FacetProvider {
-      constructor(dependencies, facet, type, value) {
-          this.dependencies = dependencies;
-          this.facet = facet;
-          this.type = type;
-          this.value = value;
-          this.id = nextID++;
-      }
-      dynamicSlot(addresses) {
-          var _a;
-          let getter = this.value;
-          let compare = this.facet.compareInput;
-          let id = this.id, idx = addresses[id] >> 1, multi = this.type == 2 /* Provider.Multi */;
-          let depDoc = false, depSel = false, depAddrs = [];
-          for (let dep of this.dependencies) {
-              if (dep == "doc")
-                  depDoc = true;
-              else if (dep == "selection")
-                  depSel = true;
-              else if ((((_a = addresses[dep.id]) !== null && _a !== void 0 ? _a : 1) & 1) == 0)
-                  depAddrs.push(addresses[dep.id]);
-          }
-          return {
-              create(state) {
-                  state.values[idx] = getter(state);
-                  return 1 /* SlotStatus.Changed */;
-              },
-              update(state, tr) {
-                  if ((depDoc && tr.docChanged) || (depSel && (tr.docChanged || tr.selection)) || ensureAll(state, depAddrs)) {
-                      let newVal = getter(state);
-                      if (multi ? !compareArray(newVal, state.values[idx], compare) : !compare(newVal, state.values[idx])) {
-                          state.values[idx] = newVal;
-                          return 1 /* SlotStatus.Changed */;
-                      }
-                  }
-                  return 0;
-              },
-              reconfigure: (state, oldState) => {
-                  let newVal, oldAddr = oldState.config.address[id];
-                  if (oldAddr != null) {
-                      let oldVal = getAddr(oldState, oldAddr);
-                      if (this.dependencies.every(dep => {
-                          return dep instanceof Facet ? oldState.facet(dep) === state.facet(dep) :
-                              dep instanceof StateField ? oldState.field(dep, false) == state.field(dep, false) : true;
-                      }) || (multi ? compareArray(newVal = getter(state), oldVal, compare) : compare(newVal = getter(state), oldVal))) {
-                          state.values[idx] = oldVal;
-                          return 0;
-                      }
-                  }
-                  else {
-                      newVal = getter(state);
-                  }
-                  state.values[idx] = newVal;
-                  return 1 /* SlotStatus.Changed */;
-              }
-          };
+      static of(ranges, sort = false) {
+          let build = new RangeSetBuilder();
+          for (let range of ranges instanceof Range ? [ranges] : sort ? lazySort(ranges) : ranges)
+              build.add(range.from, range.to, range.value);
+          return build.finish();
       }
   }
-  function compareArray(a, b, compare) {
-      if (a.length != b.length)
-          return false;
-      for (let i = 0; i < a.length; i++)
-          if (!compare(a[i], b[i]))
-              return false;
-      return true;
-  }
-  function ensureAll(state, addrs) {
-      let changed = false;
-      for (let addr of addrs)
-          if (ensureAddr(state, addr) & 1 /* SlotStatus.Changed */)
-              changed = true;
-      return changed;
-  }
-  function dynamicFacetSlot(addresses, facet, providers) {
-      let providerAddrs = providers.map(p => addresses[p.id]);
-      let providerTypes = providers.map(p => p.type);
-      let dynamic = providerAddrs.filter(p => !(p & 1));
-      let idx = addresses[facet.id] >> 1;
-      function get(state) {
-          let values = [];
-          for (let i = 0; i < providerAddrs.length; i++) {
-              let value = getAddr(state, providerAddrs[i]);
-              if (providerTypes[i] == 2 /* Provider.Multi */)
-                  for (let val of value)
-                      values.push(val);
-              else
-                  values.push(value);
-          }
-          return facet.combine(values);
-      }
-      return {
-          create(state) {
-              for (let addr of providerAddrs)
-                  ensureAddr(state, addr);
-              state.values[idx] = get(state);
-              return 1 /* SlotStatus.Changed */;
-          },
-          update(state, tr) {
-              if (!ensureAll(state, dynamic))
-                  return 0;
-              let value = get(state);
-              if (facet.compare(value, state.values[idx]))
-                  return 0;
-              state.values[idx] = value;
-              return 1 /* SlotStatus.Changed */;
-          },
-          reconfigure(state, oldState) {
-              let depChanged = ensureAll(state, providerAddrs);
-              let oldProviders = oldState.config.facets[facet.id], oldValue = oldState.facet(facet);
-              if (oldProviders && !depChanged && sameArray(providers, oldProviders)) {
-                  state.values[idx] = oldValue;
-                  return 0;
-              }
-              let value = get(state);
-              if (facet.compare(value, oldValue)) {
-                  state.values[idx] = oldValue;
-                  return 0;
-              }
-              state.values[idx] = value;
-              return 1 /* SlotStatus.Changed */;
+  /**
+  The empty set of ranges.
+  */
+  RangeSet.empty = /*@__PURE__*/new RangeSet([], [], null, -1);
+  function lazySort(ranges) {
+      if (ranges.length > 1)
+          for (let prev = ranges[0], i = 1; i < ranges.length; i++) {
+              let cur = ranges[i];
+              if (cmpRange(prev, cur) > 0)
+                  return ranges.slice().sort(cmpRange);
+              prev = cur;
           }
-      };
+      return ranges;
   }
-  const initField = /*@__PURE__*/Facet.define({ static: true });
+  RangeSet.empty.nextLayer = RangeSet.empty;
   /**
-  Fields can store additional information in an editor state, and
-  keep it in sync with the rest of the state.
+  A range set builder is a data structure that helps build up a
+  [range set](https://codemirror.net/6/docs/ref/#state.RangeSet) directly, without first allocating
+  an array of [`Range`](https://codemirror.net/6/docs/ref/#state.Range) objects.
   */
-  class StateField {
-      constructor(
+  class RangeSetBuilder {
+      finishChunk(newArrays) {
+          this.chunks.push(new Chunk(this.from, this.to, this.value, this.maxPoint));
+          this.chunkPos.push(this.chunkStart);
+          this.chunkStart = -1;
+          this.setMaxPoint = Math.max(this.setMaxPoint, this.maxPoint);
+          this.maxPoint = -1;
+          if (newArrays) {
+              this.from = [];
+              this.to = [];
+              this.value = [];
+          }
+      }
       /**
-      @internal
+      Create an empty builder.
       */
-      id, createF, updateF, compareF, 
+      constructor() {
+          this.chunks = [];
+          this.chunkPos = [];
+          this.chunkStart = -1;
+          this.last = null;
+          this.lastFrom = -1000000000 /* C.Far */;
+          this.lastTo = -1000000000 /* C.Far */;
+          this.from = [];
+          this.to = [];
+          this.value = [];
+          this.maxPoint = -1;
+          this.setMaxPoint = -1;
+          this.nextLayer = null;
+      }
       /**
-      @internal
+      Add a range. Ranges should be added in sorted (by `from` and
+      `value.startSide`) order.
       */
-      spec) {
-          this.id = id;
-          this.createF = createF;
-          this.updateF = updateF;
-          this.compareF = compareF;
-          this.spec = spec;
-          /**
-          @internal
-          */
-          this.provides = undefined;
-      }
-      /**
-      Define a state field.
-      */
-      static define(config) {
-          let field = new StateField(nextID++, config.create, config.update, config.compare || ((a, b) => a === b), config);
-          if (config.provide)
-              field.provides = config.provide(field);
-          return field;
-      }
-      create(state) {
-          let init = state.facet(initField).find(i => i.field == this);
-          return ((init === null || init === void 0 ? void 0 : init.create) || this.createF)(state);
+      add(from, to, value) {
+          if (!this.addInner(from, to, value))
+              (this.nextLayer || (this.nextLayer = new RangeSetBuilder)).add(from, to, value);
       }
       /**
       @internal
       */
-      slot(addresses) {
-          let idx = addresses[this.id] >> 1;
-          return {
-              create: (state) => {
-                  state.values[idx] = this.create(state);
-                  return 1 /* SlotStatus.Changed */;
-              },
-              update: (state, tr) => {
-                  let oldVal = state.values[idx];
-                  let value = this.updateF(oldVal, tr);
-                  if (this.compareF(oldVal, value))
-                      return 0;
-                  state.values[idx] = value;
-                  return 1 /* SlotStatus.Changed */;
-              },
-              reconfigure: (state, oldState) => {
-                  if (oldState.config.address[this.id] != null) {
-                      state.values[idx] = oldState.field(this);
-                      return 0;
-                  }
-                  state.values[idx] = this.create(state);
-                  return 1 /* SlotStatus.Changed */;
-              }
-          };
-      }
-      /**
-      Returns an extension that enables this field and overrides the
-      way it is initialized. Can be useful when you need to provide a
-      non-default starting value for the field.
-      */
-      init(create) {
-          return [this, initField.of({ field: this, create })];
+      addInner(from, to, value) {
+          let diff = from - this.lastTo || value.startSide - this.last.endSide;
+          if (diff <= 0 && (from - this.lastFrom || value.startSide - this.last.startSide) < 0)
+              throw new Error("Ranges must be added sorted by `from` position and `startSide`");
+          if (diff < 0)
+              return false;
+          if (this.from.length == 250 /* C.ChunkSize */)
+              this.finishChunk(true);
+          if (this.chunkStart < 0)
+              this.chunkStart = from;
+          this.from.push(from - this.chunkStart);
+          this.to.push(to - this.chunkStart);
+          this.last = value;
+          this.lastFrom = from;
+          this.lastTo = to;
+          this.value.push(value);
+          if (value.point)
+              this.maxPoint = Math.max(this.maxPoint, to - from);
+          return true;
       }
       /**
-      State field instances can be used as
-      [`Extension`](https://codemirror.net/6/docs/ref/#state.Extension) values to enable the field in a
-      given state.
-      */
-      get extension() { return this; }
-  }
-  const Prec_ = { lowest: 4, low: 3, default: 2, high: 1, highest: 0 };
-  function prec(value) {
-      return (ext) => new PrecExtension(ext, value);
-  }
-  /**
-  By default extensions are registered in the order they are found
-  in the flattened form of nested array that was provided.
-  Individual extension values can be assigned a precedence to
-  override this. Extensions that do not have a precedence set get
-  the precedence of the nearest parent with a precedence, or
-  [`default`](https://codemirror.net/6/docs/ref/#state.Prec.default) if there is no such parent. The
-  final ordering of extensions is determined by first sorting by
-  precedence and then by order within each precedence.
-  */
-  const Prec = {
-      /**
-      The highest precedence level, for extensions that should end up
-      near the start of the precedence ordering.
-      */
-      highest: /*@__PURE__*/prec(Prec_.highest),
-      /**
-      A higher-than-default precedence, for extensions that should
-      come before those with default precedence.
-      */
-      high: /*@__PURE__*/prec(Prec_.high),
-      /**
-      The default precedence, which is also used for extensions
-      without an explicit precedence.
-      */
-      default: /*@__PURE__*/prec(Prec_.default),
-      /**
-      A lower-than-default precedence.
-      */
-      low: /*@__PURE__*/prec(Prec_.low),
-      /**
-      The lowest precedence level. Meant for things that should end up
-      near the end of the extension order.
+      @internal
       */
-      lowest: /*@__PURE__*/prec(Prec_.lowest)
-  };
-  class PrecExtension {
-      constructor(inner, prec) {
-          this.inner = inner;
-          this.prec = prec;
+      addChunk(from, chunk) {
+          if ((from - this.lastTo || chunk.value[0].startSide - this.last.endSide) < 0)
+              return false;
+          if (this.from.length)
+              this.finishChunk(true);
+          this.setMaxPoint = Math.max(this.setMaxPoint, chunk.maxPoint);
+          this.chunks.push(chunk);
+          this.chunkPos.push(from);
+          let last = chunk.value.length - 1;
+          this.last = chunk.value[last];
+          this.lastFrom = chunk.from[last] + from;
+          this.lastTo = chunk.to[last] + from;
+          return true;
       }
-  }
-  /**
-  Extension compartments can be used to make a configuration
-  dynamic. By [wrapping](https://codemirror.net/6/docs/ref/#state.Compartment.of) part of your
-  configuration in a compartment, you can later
-  [replace](https://codemirror.net/6/docs/ref/#state.Compartment.reconfigure) that part through a
-  transaction.
-  */
-  class Compartment {
-      /**
-      Create an instance of this compartment to add to your [state
-      configuration](https://codemirror.net/6/docs/ref/#state.EditorStateConfig.extensions).
-      */
-      of(ext) { return new CompartmentInstance(this, ext); }
       /**
-      Create an [effect](https://codemirror.net/6/docs/ref/#state.TransactionSpec.effects) that
-      reconfigures this compartment.
+      Finish the range set. Returns the new set. The builder can't be
+      used anymore after this has been called.
       */
-      reconfigure(content) {
-          return Compartment.reconfigure.of({ compartment: this, extension: content });
-      }
+      finish() { return this.finishInner(RangeSet.empty); }
       /**
-      Get the current content of the compartment in the state, or
-      `undefined` if it isn't present.
+      @internal
       */
-      get(state) {
-          return state.config.compartments.get(this);
+      finishInner(next) {
+          if (this.from.length)
+              this.finishChunk(false);
+          if (this.chunks.length == 0)
+              return next;
+          let result = RangeSet.create(this.chunkPos, this.chunks, this.nextLayer ? this.nextLayer.finishInner(next) : next, this.setMaxPoint);
+          this.from = null; // Make sure further `add` calls produce errors
+          return result;
       }
   }
-  class CompartmentInstance {
-      constructor(compartment, inner) {
-          this.compartment = compartment;
-          this.inner = inner;
-      }
+  function findSharedChunks(a, b, textDiff) {
+      let inA = new Map();
+      for (let set of a)
+          for (let i = 0; i < set.chunk.length; i++)
+              if (set.chunk[i].maxPoint <= 0)
+                  inA.set(set.chunk[i], set.chunkPos[i]);
+      let shared = new Set();
+      for (let set of b)
+          for (let i = 0; i < set.chunk.length; i++) {
+              let known = inA.get(set.chunk[i]);
+              if (known != null && (textDiff ? textDiff.mapPos(known) : known) == set.chunkPos[i] &&
+                  !(textDiff === null || textDiff === void 0 ? void 0 : textDiff.touchesRange(known, known + set.chunk[i].length)))
+                  shared.add(set.chunk[i]);
+          }
+      return shared;
   }
-  class Configuration {
-      constructor(base, compartments, dynamicSlots, address, staticValues, facets) {
-          this.base = base;
-          this.compartments = compartments;
-          this.dynamicSlots = dynamicSlots;
-          this.address = address;
-          this.staticValues = staticValues;
-          this.facets = facets;
-          this.statusTemplate = [];
-          while (this.statusTemplate.length < dynamicSlots.length)
-              this.statusTemplate.push(0 /* SlotStatus.Unresolved */);
+  class LayerCursor {
+      constructor(layer, skip, minPoint, rank = 0) {
+          this.layer = layer;
+          this.skip = skip;
+          this.minPoint = minPoint;
+          this.rank = rank;
       }
-      staticFacet(facet) {
-          let addr = this.address[facet.id];
-          return addr == null ? facet.default : this.staticValues[addr >> 1];
+      get startSide() { return this.value ? this.value.startSide : 0; }
+      get endSide() { return this.value ? this.value.endSide : 0; }
+      goto(pos, side = -1000000000 /* C.Far */) {
+          this.chunkIndex = this.rangeIndex = 0;
+          this.gotoInner(pos, side, false);
+          return this;
       }
-      static resolve(base, compartments, oldState) {
-          let fields = [];
-          let facets = Object.create(null);
-          let newCompartments = new Map();
-          for (let ext of flatten(base, compartments, newCompartments)) {
-              if (ext instanceof StateField)
-                  fields.push(ext);
-              else
-                  (facets[ext.facet.id] || (facets[ext.facet.id] = [])).push(ext);
+      gotoInner(pos, side, forward) {
+          while (this.chunkIndex < this.layer.chunk.length) {
+              let next = this.layer.chunk[this.chunkIndex];
+              if (!(this.skip && this.skip.has(next) ||
+                  this.layer.chunkEnd(this.chunkIndex) < pos ||
+                  next.maxPoint < this.minPoint))
+                  break;
+              this.chunkIndex++;
+              forward = false;
           }
-          let address = Object.create(null);
-          let staticValues = [];
-          let dynamicSlots = [];
-          for (let field of fields) {
-              address[field.id] = dynamicSlots.length << 1;
-              dynamicSlots.push(a => field.slot(a));
+          if (this.chunkIndex < this.layer.chunk.length) {
+              let rangeIndex = this.layer.chunk[this.chunkIndex].findIndex(pos - this.layer.chunkPos[this.chunkIndex], side, true);
+              if (!forward || this.rangeIndex < rangeIndex)
+                  this.setRangeIndex(rangeIndex);
           }
-          let oldFacets = oldState === null || oldState === void 0 ? void 0 : oldState.config.facets;
-          for (let id in facets) {
-              let providers = facets[id], facet = providers[0].facet;
-              let oldProviders = oldFacets && oldFacets[id] || [];
-              if (providers.every(p => p.type == 0 /* Provider.Static */)) {
-                  address[facet.id] = (staticValues.length << 1) | 1;
-                  if (sameArray(oldProviders, providers)) {
-                      staticValues.push(oldState.facet(facet));
-                  }
-                  else {
-                      let value = facet.combine(providers.map(p => p.value));
-                      staticValues.push(oldState && facet.compare(value, oldState.facet(facet)) ? oldState.facet(facet) : value);
-                  }
+          this.next();
+      }
+      forward(pos, side) {
+          if ((this.to - pos || this.endSide - side) < 0)
+              this.gotoInner(pos, side, true);
+      }
+      next() {
+          for (;;) {
+              if (this.chunkIndex == this.layer.chunk.length) {
+                  this.from = this.to = 1000000000 /* C.Far */;
+                  this.value = null;
+                  break;
               }
               else {
-                  for (let p of providers) {
-                      if (p.type == 0 /* Provider.Static */) {
-                          address[p.id] = (staticValues.length << 1) | 1;
-                          staticValues.push(p.value);
-                      }
-                      else {
-                          address[p.id] = dynamicSlots.length << 1;
-                          dynamicSlots.push(a => p.dynamicSlot(a));
-                      }
-                  }
-                  address[facet.id] = dynamicSlots.length << 1;
-                  dynamicSlots.push(a => dynamicFacetSlot(a, facet, providers));
+                  let chunkPos = this.layer.chunkPos[this.chunkIndex], chunk = this.layer.chunk[this.chunkIndex];
+                  let from = chunkPos + chunk.from[this.rangeIndex];
+                  this.from = from;
+                  this.to = chunkPos + chunk.to[this.rangeIndex];
+                  this.value = chunk.value[this.rangeIndex];
+                  this.setRangeIndex(this.rangeIndex + 1);
+                  if (this.minPoint < 0 || this.value.point && this.to - this.from >= this.minPoint)
+                      break;
               }
           }
-          let dynamic = dynamicSlots.map(f => f(address));
-          return new Configuration(base, newCompartments, dynamic, address, staticValues, facets);
       }
-  }
-  function flatten(extension, compartments, newCompartments) {
-      let result = [[], [], [], [], []];
-      let seen = new Map();
-      function inner(ext, prec) {
-          let known = seen.get(ext);
-          if (known != null) {
-              if (known <= prec)
-                  return;
-              let found = result[known].indexOf(ext);
-              if (found > -1)
-                  result[known].splice(found, 1);
-              if (ext instanceof CompartmentInstance)
-                  newCompartments.delete(ext.compartment);
-          }
-          seen.set(ext, prec);
-          if (Array.isArray(ext)) {
-              for (let e of ext)
-                  inner(e, prec);
-          }
-          else if (ext instanceof CompartmentInstance) {
-              if (newCompartments.has(ext.compartment))
-                  throw new RangeError(`Duplicate use of compartment in extensions`);
-              let content = compartments.get(ext.compartment) || ext.inner;
-              newCompartments.set(ext.compartment, content);
-              inner(content, prec);
+      setRangeIndex(index) {
+          if (index == this.layer.chunk[this.chunkIndex].value.length) {
+              this.chunkIndex++;
+              if (this.skip) {
+                  while (this.chunkIndex < this.layer.chunk.length && this.skip.has(this.layer.chunk[this.chunkIndex]))
+                      this.chunkIndex++;
+              }
+              this.rangeIndex = 0;
           }
-          else if (ext instanceof PrecExtension) {
-              inner(ext.inner, ext.prec);
+          else {
+              this.rangeIndex = index;
           }
-          else if (ext instanceof StateField) {
-              result[prec].push(ext);
-              if (ext.provides)
-                  inner(ext.provides, prec);
+      }
+      nextChunk() {
+          this.chunkIndex++;
+          this.rangeIndex = 0;
+          this.next();
+      }
+      compare(other) {
+          return this.from - other.from || this.startSide - other.startSide || this.rank - other.rank ||
+              this.to - other.to || this.endSide - other.endSide;
+      }
+  }
+  class HeapCursor {
+      constructor(heap) {
+          this.heap = heap;
+      }
+      static from(sets, skip = null, minPoint = -1) {
+          let heap = [];
+          for (let i = 0; i < sets.length; i++) {
+              for (let cur = sets[i]; !cur.isEmpty; cur = cur.nextLayer) {
+                  if (cur.maxPoint >= minPoint)
+                      heap.push(new LayerCursor(cur, skip, minPoint, i));
+              }
           }
-          else if (ext instanceof FacetProvider) {
-              result[prec].push(ext);
-              if (ext.facet.extensions)
-                  inner(ext.facet.extensions, Prec_.default);
+          return heap.length == 1 ? heap[0] : new HeapCursor(heap);
+      }
+      get startSide() { return this.value ? this.value.startSide : 0; }
+      goto(pos, side = -1000000000 /* C.Far */) {
+          for (let cur of this.heap)
+              cur.goto(pos, side);
+          for (let i = this.heap.length >> 1; i >= 0; i--)
+              heapBubble(this.heap, i);
+          this.next();
+          return this;
+      }
+      forward(pos, side) {
+          for (let cur of this.heap)
+              cur.forward(pos, side);
+          for (let i = this.heap.length >> 1; i >= 0; i--)
+              heapBubble(this.heap, i);
+          if ((this.to - pos || this.value.endSide - side) < 0)
+              this.next();
+      }
+      next() {
+          if (this.heap.length == 0) {
+              this.from = this.to = 1000000000 /* C.Far */;
+              this.value = null;
+              this.rank = -1;
           }
           else {
-              let content = ext.extension;
-              if (!content)
-                  throw new Error(`Unrecognized extension value in extension set (${ext}). This sometimes happens because multiple instances of @codemirror/state are loaded, breaking instanceof checks.`);
-              inner(content, prec);
+              let top = this.heap[0];
+              this.from = top.from;
+              this.to = top.to;
+              this.value = top.value;
+              this.rank = top.rank;
+              if (top.value)
+                  top.next();
+              heapBubble(this.heap, 0);
           }
       }
-      inner(extension, Prec_.default);
-      return result.reduce((a, b) => a.concat(b));
-  }
-  function ensureAddr(state, addr) {
-      if (addr & 1)
-          return 2 /* SlotStatus.Computed */;
-      let idx = addr >> 1;
-      let status = state.status[idx];
-      if (status == 4 /* SlotStatus.Computing */)
-          throw new Error("Cyclic dependency between fields and/or facets");
-      if (status & 2 /* SlotStatus.Computed */)
-          return status;
-      state.status[idx] = 4 /* SlotStatus.Computing */;
-      let changed = state.computeSlot(state, state.config.dynamicSlots[idx]);
-      return state.status[idx] = 2 /* SlotStatus.Computed */ | changed;
-  }
-  function getAddr(state, addr) {
-      return addr & 1 ? state.config.staticValues[addr >> 1] : state.values[addr >> 1];
   }
-
-  const languageData = /*@__PURE__*/Facet.define();
-  const allowMultipleSelections = /*@__PURE__*/Facet.define({
-      combine: values => values.some(v => v),
-      static: true
-  });
-  const lineSeparator = /*@__PURE__*/Facet.define({
-      combine: values => values.length ? values[0] : undefined,
-      static: true
-  });
-  const changeFilter = /*@__PURE__*/Facet.define();
-  const transactionFilter = /*@__PURE__*/Facet.define();
-  const transactionExtender = /*@__PURE__*/Facet.define();
-  const readOnly = /*@__PURE__*/Facet.define({
-      combine: values => values.length ? values[0] : false
-  });
-
-  /**
-  Annotations are tagged values that are used to add metadata to
-  transactions in an extensible way. They should be used to model
-  things that effect the entire transaction (such as its [time
-  stamp](https://codemirror.net/6/docs/ref/#state.Transaction^time) or information about its
-  [origin](https://codemirror.net/6/docs/ref/#state.Transaction^userEvent)). For effects that happen
-  _alongside_ the other changes made by the transaction, [state
-  effects](https://codemirror.net/6/docs/ref/#state.StateEffect) are more appropriate.
-  */
-  class Annotation {
-      /**
-      @internal
-      */
-      constructor(
-      /**
-      The annotation type.
-      */
-      type, 
-      /**
-      The value of this annotation.
-      */
-      value) {
-          this.type = type;
-          this.value = value;
+  function heapBubble(heap, index) {
+      for (let cur = heap[index];;) {
+          let childIndex = (index << 1) + 1;
+          if (childIndex >= heap.length)
+              break;
+          let child = heap[childIndex];
+          if (childIndex + 1 < heap.length && child.compare(heap[childIndex + 1]) >= 0) {
+              child = heap[childIndex + 1];
+              childIndex++;
+          }
+          if (cur.compare(child) < 0)
+              break;
+          heap[childIndex] = cur;
+          heap[index] = child;
+          index = childIndex;
       }
-      /**
-      Define a new type of annotation.
-      */
-      static define() { return new AnnotationType(); }
   }
-  /**
-  Marker that identifies a type of [annotation](https://codemirror.net/6/docs/ref/#state.Annotation).
-  */
-  class AnnotationType {
-      /**
-      Create an instance of this annotation.
-      */
-      of(value) { return new Annotation(this, value); }
-  }
-  /**
-  Representation of a type of state effect. Defined with
-  [`StateEffect.define`](https://codemirror.net/6/docs/ref/#state.StateEffect^define).
-  */
-  class StateEffectType {
-      /**
-      @internal
-      */
-      constructor(
-      // The `any` types in these function types are there to work
-      // around TypeScript issue #37631, where the type guard on
-      // `StateEffect.is` mysteriously stops working when these properly
-      // have type `Value`.
-      /**
-      @internal
-      */
-      map) {
-          this.map = map;
+  class SpanCursor {
+      constructor(sets, skip, minPoint) {
+          this.minPoint = minPoint;
+          this.active = [];
+          this.activeTo = [];
+          this.activeRank = [];
+          this.minActive = -1;
+          // A currently active point range, if any
+          this.point = null;
+          this.pointFrom = 0;
+          this.pointRank = 0;
+          this.to = -1000000000 /* C.Far */;
+          this.endSide = 0;
+          // The amount of open active ranges at the start of the iterator.
+          // Not including points.
+          this.openStart = -1;
+          this.cursor = HeapCursor.from(sets, skip, minPoint);
       }
-      /**
-      Create a [state effect](https://codemirror.net/6/docs/ref/#state.StateEffect) instance of this
-      type.
-      */
-      of(value) { return new StateEffect(this, value); }
-  }
-  /**
-  State effects can be used to represent additional effects
-  associated with a [transaction](https://codemirror.net/6/docs/ref/#state.Transaction.effects). They
-  are often useful to model changes to custom [state
-  fields](https://codemirror.net/6/docs/ref/#state.StateField), when those changes aren't implicit in
-  document or selection changes.
-  */
-  class StateEffect {
-      /**
-      @internal
-      */
-      constructor(
-      /**
-      @internal
-      */
-      type, 
-      /**
-      The value of this effect.
-      */
-      value) {
-          this.type = type;
-          this.value = value;
-      }
-      /**
-      Map this effect through a position mapping. Will return
-      `undefined` when that ends up deleting the effect.
-      */
-      map(mapping) {
-          let mapped = this.type.map(this.value, mapping);
-          return mapped === undefined ? undefined : mapped == this.value ? this : new StateEffect(this.type, mapped);
-      }
-      /**
-      Tells you whether this effect object is of a given
-      [type](https://codemirror.net/6/docs/ref/#state.StateEffectType).
-      */
-      is(type) { return this.type == type; }
-      /**
-      Define a new effect type. The type parameter indicates the type
-      of values that his effect holds.
-      */
-      static define(spec = {}) {
-          return new StateEffectType(spec.map || (v => v));
-      }
-      /**
-      Map an array of effects through a change set.
-      */
-      static mapEffects(effects, mapping) {
-          if (!effects.length)
-              return effects;
-          let result = [];
-          for (let effect of effects) {
-              let mapped = effect.map(mapping);
-              if (mapped)
-                  result.push(mapped);
-          }
-          return result;
-      }
-  }
-  /**
-  This effect can be used to reconfigure the root extensions of
-  the editor. Doing this will discard any extensions
-  [appended](https://codemirror.net/6/docs/ref/#state.StateEffect^appendConfig), but does not reset
-  the content of [reconfigured](https://codemirror.net/6/docs/ref/#state.Compartment.reconfigure)
-  compartments.
-  */
-  StateEffect.reconfigure = /*@__PURE__*/StateEffect.define();
-  /**
-  Append extensions to the top-level configuration of the editor.
-  */
-  StateEffect.appendConfig = /*@__PURE__*/StateEffect.define();
-  /**
-  Changes to the editor state are grouped into transactions.
-  Typically, a user action creates a single transaction, which may
-  contain any number of document changes, may change the selection,
-  or have other effects. Create a transaction by calling
-  [`EditorState.update`](https://codemirror.net/6/docs/ref/#state.EditorState.update), or immediately
-  dispatch one by calling
-  [`EditorView.dispatch`](https://codemirror.net/6/docs/ref/#view.EditorView.dispatch).
-  */
-  class Transaction {
-      constructor(
-      /**
-      The state from which the transaction starts.
-      */
-      startState, 
-      /**
-      The document changes made by this transaction.
-      */
-      changes, 
-      /**
-      The selection set by this transaction, or undefined if it
-      doesn't explicitly set a selection.
-      */
-      selection, 
-      /**
-      The effects added to the transaction.
-      */
-      effects, 
-      /**
-      @internal
-      */
-      annotations, 
-      /**
-      Whether the selection should be scrolled into view after this
-      transaction is dispatched.
-      */
-      scrollIntoView) {
-          this.startState = startState;
-          this.changes = changes;
-          this.selection = selection;
-          this.effects = effects;
-          this.annotations = annotations;
-          this.scrollIntoView = scrollIntoView;
-          /**
-          @internal
-          */
-          this._doc = null;
-          /**
-          @internal
-          */
-          this._state = null;
-          if (selection)
-              checkSelection(selection, changes.newLength);
-          if (!annotations.some((a) => a.type == Transaction.time))
-              this.annotations = annotations.concat(Transaction.time.of(Date.now()));
+      goto(pos, side = -1000000000 /* C.Far */) {
+          this.cursor.goto(pos, side);
+          this.active.length = this.activeTo.length = this.activeRank.length = 0;
+          this.minActive = -1;
+          this.to = pos;
+          this.endSide = side;
+          this.openStart = -1;
+          this.next();
+          return this;
       }
-      /**
-      @internal
-      */
-      static create(startState, changes, selection, effects, annotations, scrollIntoView) {
-          return new Transaction(startState, changes, selection, effects, annotations, scrollIntoView);
+      forward(pos, side) {
+          while (this.minActive > -1 && (this.activeTo[this.minActive] - pos || this.active[this.minActive].endSide - side) < 0)
+              this.removeActive(this.minActive);
+          this.cursor.forward(pos, side);
       }
-      /**
-      The new document produced by the transaction. Contrary to
-      [`.state`](https://codemirror.net/6/docs/ref/#state.Transaction.state)`.doc`, accessing this won't
-      force the entire new state to be computed right away, so it is
-      recommended that [transaction
-      filters](https://codemirror.net/6/docs/ref/#state.EditorState^transactionFilter) use this getter
-      when they need to look at the new document.
-      */
-      get newDoc() {
-          return this._doc || (this._doc = this.changes.apply(this.startState.doc));
+      removeActive(index) {
+          remove(this.active, index);
+          remove(this.activeTo, index);
+          remove(this.activeRank, index);
+          this.minActive = findMinIndex(this.active, this.activeTo);
       }
-      /**
-      The new selection produced by the transaction. If
-      [`this.selection`](https://codemirror.net/6/docs/ref/#state.Transaction.selection) is undefined,
-      this will [map](https://codemirror.net/6/docs/ref/#state.EditorSelection.map) the start state's
-      current selection through the changes made by the transaction.
-      */
-      get newSelection() {
-          return this.selection || this.startState.selection.map(this.changes);
+      addActive(trackOpen) {
+          let i = 0, { value, to, rank } = this.cursor;
+          while (i < this.activeRank.length && this.activeRank[i] <= rank)
+              i++;
+          insert(this.active, i, value);
+          insert(this.activeTo, i, to);
+          insert(this.activeRank, i, rank);
+          if (trackOpen)
+              insert(trackOpen, i, this.cursor.from);
+          this.minActive = findMinIndex(this.active, this.activeTo);
       }
-      /**
-      The new state created by the transaction. Computed on demand
-      (but retained for subsequent access), so it is recommended not to
-      access it in [transaction
-      filters](https://codemirror.net/6/docs/ref/#state.EditorState^transactionFilter) when possible.
-      */
-      get state() {
-          if (!this._state)
-              this.startState.applyTransaction(this);
-          return this._state;
+      // After calling this, if `this.point` != null, the next range is a
+      // point. Otherwise, it's a regular range, covered by `this.active`.
+      next() {
+          let from = this.to, wasPoint = this.point;
+          this.point = null;
+          let trackOpen = this.openStart < 0 ? [] : null;
+          for (;;) {
+              let a = this.minActive;
+              if (a > -1 && (this.activeTo[a] - this.cursor.from || this.active[a].endSide - this.cursor.startSide) < 0) {
+                  if (this.activeTo[a] > from) {
+                      this.to = this.activeTo[a];
+                      this.endSide = this.active[a].endSide;
+                      break;
+                  }
+                  this.removeActive(a);
+                  if (trackOpen)
+                      remove(trackOpen, a);
+              }
+              else if (!this.cursor.value) {
+                  this.to = this.endSide = 1000000000 /* C.Far */;
+                  break;
+              }
+              else if (this.cursor.from > from) {
+                  this.to = this.cursor.from;
+                  this.endSide = this.cursor.startSide;
+                  break;
+              }
+              else {
+                  let nextVal = this.cursor.value;
+                  if (!nextVal.point) { // Opening a range
+                      this.addActive(trackOpen);
+                      this.cursor.next();
+                  }
+                  else if (wasPoint && this.cursor.to == this.to && this.cursor.from < this.cursor.to) {
+                      // Ignore any non-empty points that end precisely at the end of the prev point
+                      this.cursor.next();
+                  }
+                  else { // New point
+                      this.point = nextVal;
+                      this.pointFrom = this.cursor.from;
+                      this.pointRank = this.cursor.rank;
+                      this.to = this.cursor.to;
+                      this.endSide = nextVal.endSide;
+                      this.cursor.next();
+                      this.forward(this.to, this.endSide);
+                      break;
+                  }
+              }
+          }
+          if (trackOpen) {
+              this.openStart = 0;
+              for (let i = trackOpen.length - 1; i >= 0 && trackOpen[i] < from; i--)
+                  this.openStart++;
+          }
       }
-      /**
-      Get the value of the given annotation type, if any.
-      */
-      annotation(type) {
-          for (let ann of this.annotations)
-              if (ann.type == type)
-                  return ann.value;
-          return undefined;
+      activeForPoint(to) {
+          if (!this.active.length)
+              return this.active;
+          let active = [];
+          for (let i = this.active.length - 1; i >= 0; i--) {
+              if (this.activeRank[i] < this.pointRank)
+                  break;
+              if (this.activeTo[i] > to || this.activeTo[i] == to && this.active[i].endSide >= this.point.endSide)
+                  active.push(this.active[i]);
+          }
+          return active.reverse();
       }
-      /**
-      Indicates whether the transaction changed the document.
-      */
-      get docChanged() { return !this.changes.empty; }
-      /**
-      Indicates whether this transaction reconfigures the state
-      (through a [configuration compartment](https://codemirror.net/6/docs/ref/#state.Compartment) or
-      with a top-level configuration
-      [effect](https://codemirror.net/6/docs/ref/#state.StateEffect^reconfigure).
-      */
-      get reconfigured() { return this.startState.config != this.state.config; }
-      /**
-      Returns true if the transaction has a [user
-      event](https://codemirror.net/6/docs/ref/#state.Transaction^userEvent) annotation that is equal to
-      or more specific than `event`. For example, if the transaction
-      has `"select.pointer"` as user event, `"select"` and
-      `"select.pointer"` will match it.
-      */
-      isUserEvent(event) {
-          let e = this.annotation(Transaction.userEvent);
-          return !!(e && (e == event || e.length > event.length && e.slice(0, event.length) == event && e[event.length] == "."));
+      openEnd(to) {
+          let open = 0;
+          for (let i = this.activeTo.length - 1; i >= 0 && this.activeTo[i] > to; i--)
+              open++;
+          return open;
       }
   }
-  /**
-  Annotation used to store transaction timestamps. Automatically
-  added to every transaction, holding `Date.now()`.
-  */
-  Transaction.time = /*@__PURE__*/Annotation.define();
-  /**
-  Annotation used to associate a transaction with a user interface
-  event. Holds a string identifying the event, using a
-  dot-separated format to support attaching more specific
-  information. The events used by the core libraries are:
-
-   - `"input"` when content is entered
-     - `"input.type"` for typed input
-       - `"input.type.compose"` for composition
-     - `"input.paste"` for pasted input
-     - `"input.drop"` when adding content with drag-and-drop
-     - `"input.complete"` when autocompleting
-   - `"delete"` when the user deletes content
-     - `"delete.selection"` when deleting the selection
-     - `"delete.forward"` when deleting forward from the selection
-     - `"delete.backward"` when deleting backward from the selection
-     - `"delete.cut"` when cutting to the clipboard
-   - `"move"` when content is moved
-     - `"move.drop"` when content is moved within the editor through drag-and-drop
-   - `"select"` when explicitly changing the selection
-     - `"select.pointer"` when selecting with a mouse or other pointing device
-   - `"undo"` and `"redo"` for history actions
-
-  Use [`isUserEvent`](https://codemirror.net/6/docs/ref/#state.Transaction.isUserEvent) to check
-  whether the annotation matches a given event.
-  */
-  Transaction.userEvent = /*@__PURE__*/Annotation.define();
-  /**
-  Annotation indicating whether a transaction should be added to
-  the undo history or not.
-  */
-  Transaction.addToHistory = /*@__PURE__*/Annotation.define();
-  /**
-  Annotation indicating (when present and true) that a transaction
-  represents a change made by some other actor, not the user. This
-  is used, for example, to tag other people's changes in
-  collaborative editing.
-  */
-  Transaction.remote = /*@__PURE__*/Annotation.define();
-  function joinRanges(a, b) {
-      let result = [];
-      for (let iA = 0, iB = 0;;) {
-          let from, to;
-          if (iA < a.length && (iB == b.length || b[iB] >= a[iA])) {
-              from = a[iA++];
-              to = a[iA++];
+  function compare(a, startA, b, startB, length, comparator) {
+      a.goto(startA);
+      b.goto(startB);
+      let endB = startB + length;
+      let pos = startB, dPos = startB - startA;
+      for (;;) {
+          let diff = (a.to + dPos) - b.to || a.endSide - b.endSide;
+          let end = diff < 0 ? a.to + dPos : b.to, clipEnd = Math.min(end, endB);
+          if (a.point || b.point) {
+              if (!(a.point && b.point && (a.point == b.point || a.point.eq(b.point)) &&
+                  sameValues(a.activeForPoint(a.to), b.activeForPoint(b.to))))
+                  comparator.comparePoint(pos, clipEnd, a.point, b.point);
           }
-          else if (iB < b.length) {
-              from = b[iB++];
-              to = b[iB++];
+          else {
+              if (clipEnd > pos && !sameValues(a.active, b.active))
+                  comparator.compareRange(pos, clipEnd, a.active, b.active);
           }
-          else
-              return result;
-          if (!result.length || result[result.length - 1] < from)
-              result.push(from, to);
-          else if (result[result.length - 1] < to)
-              result[result.length - 1] = to;
+          if (end > endB)
+              break;
+          pos = end;
+          if (diff <= 0)
+              a.next();
+          if (diff >= 0)
+              b.next();
       }
   }
-  function mergeTransaction(a, b, sequential) {
-      var _a;
-      let mapForA, mapForB, changes;
-      if (sequential) {
-          mapForA = b.changes;
-          mapForB = ChangeSet.empty(b.changes.length);
-          changes = a.changes.compose(b.changes);
-      }
-      else {
-          mapForA = b.changes.map(a.changes);
-          mapForB = a.changes.mapDesc(b.changes, true);
-          changes = a.changes.compose(mapForA);
-      }
-      return {
-          changes,
-          selection: b.selection ? b.selection.map(mapForB) : (_a = a.selection) === null || _a === void 0 ? void 0 : _a.map(mapForA),
-          effects: StateEffect.mapEffects(a.effects, mapForA).concat(StateEffect.mapEffects(b.effects, mapForB)),
-          annotations: a.annotations.length ? a.annotations.concat(b.annotations) : b.annotations,
-          scrollIntoView: a.scrollIntoView || b.scrollIntoView
-      };
+  function sameValues(a, b) {
+      if (a.length != b.length)
+          return false;
+      for (let i = 0; i < a.length; i++)
+          if (a[i] != b[i] && !a[i].eq(b[i]))
+              return false;
+      return true;
   }
-  function resolveTransactionInner(state, spec, docSize) {
-      let sel = spec.selection, annotations = asArray(spec.annotations);
-      if (spec.userEvent)
-          annotations = annotations.concat(Transaction.userEvent.of(spec.userEvent));
-      return {
-          changes: spec.changes instanceof ChangeSet ? spec.changes
-              : ChangeSet.of(spec.changes || [], docSize, state.facet(lineSeparator)),
-          selection: sel && (sel instanceof EditorSelection ? sel : EditorSelection.single(sel.anchor, sel.head)),
-          effects: asArray(spec.effects),
-          annotations,
-          scrollIntoView: !!spec.scrollIntoView
-      };
+  function remove(array, index) {
+      for (let i = index, e = array.length - 1; i < e; i++)
+          array[i] = array[i + 1];
+      array.pop();
   }
-  function resolveTransaction(state, specs, filter) {
-      let s = resolveTransactionInner(state, specs.length ? specs[0] : {}, state.doc.length);
-      if (specs.length && specs[0].filter === false)
-          filter = false;
-      for (let i = 1; i < specs.length; i++) {
-          if (specs[i].filter === false)
-              filter = false;
-          let seq = !!specs[i].sequential;
-          s = mergeTransaction(s, resolveTransactionInner(state, specs[i], seq ? s.changes.newLength : state.doc.length), seq);
-      }
-      let tr = Transaction.create(state, s.changes, s.selection, s.effects, s.annotations, s.scrollIntoView);
-      return extendTransaction(filter ? filterTransaction(tr) : tr);
+  function insert(array, index, value) {
+      for (let i = array.length - 1; i >= index; i--)
+          array[i + 1] = array[i];
+      array[index] = value;
   }
-  // Finish a transaction by applying filters if necessary.
-  function filterTransaction(tr) {
-      let state = tr.startState;
-      // Change filters
-      let result = true;
-      for (let filter of state.facet(changeFilter)) {
-          let value = filter(tr);
-          if (value === false) {
-              result = false;
-              break;
-          }
-          if (Array.isArray(value))
-              result = result === true ? value : joinRanges(result, value);
-      }
-      if (result !== true) {
-          let changes, back;
-          if (result === false) {
-              back = tr.changes.invertedDesc;
-              changes = ChangeSet.empty(state.doc.length);
-          }
-          else {
-              let filtered = tr.changes.filter(result);
-              changes = filtered.changes;
-              back = filtered.filtered.mapDesc(filtered.changes).invertedDesc;
+  function findMinIndex(value, array) {
+      let found = -1, foundPos = 1000000000 /* C.Far */;
+      for (let i = 0; i < array.length; i++)
+          if ((array[i] - foundPos || value[i].endSide - value[found].endSide) < 0) {
+              found = i;
+              foundPos = array[i];
           }
-          tr = Transaction.create(state, changes, tr.selection && tr.selection.map(back), StateEffect.mapEffects(tr.effects, back), tr.annotations, tr.scrollIntoView);
-      }
-      // Transaction filters
-      let filters = state.facet(transactionFilter);
-      for (let i = filters.length - 1; i >= 0; i--) {
-          let filtered = filters[i](tr);
-          if (filtered instanceof Transaction)
-              tr = filtered;
-          else if (Array.isArray(filtered) && filtered.length == 1 && filtered[0] instanceof Transaction)
-              tr = filtered[0];
-          else
-              tr = resolveTransaction(state, asArray(filtered), false);
-      }
-      return tr;
+      return found;
   }
-  function extendTransaction(tr) {
-      let state = tr.startState, extenders = state.facet(transactionExtender), spec = tr;
-      for (let i = extenders.length - 1; i >= 0; i--) {
-          let extension = extenders[i](tr);
-          if (extension && Object.keys(extension).length)
-              spec = mergeTransaction(spec, resolveTransactionInner(state, extension, tr.changes.newLength), true);
+  /**
+  Find the offset that corresponds to the given column position in a
+  string, taking extending characters and tab size into account. By
+  default, the string length is returned when it is too short to
+  reach the column. Pass `strict` true to make it return -1 in that
+  situation.
+  */
+  function findColumn(string, col, tabSize, strict) {
+      for (let i = 0, n = 0;;) {
+          if (n >= col)
+              return i;
+          if (i == string.length)
+              break;
+          n += string.charCodeAt(i) == 9 ? tabSize - (n % tabSize) : 1;
+          i = findClusterBreak(string, i);
       }
-      return spec == tr ? tr : Transaction.create(state, tr.changes, tr.selection, spec.effects, spec.annotations, spec.scrollIntoView);
-  }
-  const none$1 = [];
-  function asArray(value) {
-      return value == null ? none$1 : Array.isArray(value) ? value : [value];
+      return strict === true ? -1 : string.length;
   }
 
-  /**
-  The categories produced by a [character
-  categorizer](https://codemirror.net/6/docs/ref/#state.EditorState.charCategorizer). These are used
-  do things like selecting by word.
-  */
-  var CharCategory = /*@__PURE__*/(function (CharCategory) {
-      /**
-      Word characters.
-      */
-      CharCategory[CharCategory["Word"] = 0] = "Word";
-      /**
-      Whitespace.
-      */
-      CharCategory[CharCategory["Space"] = 1] = "Space";
-      /**
-      Anything else.
-      */
-      CharCategory[CharCategory["Other"] = 2] = "Other";
-  return CharCategory})(CharCategory || (CharCategory = {}));
-  const nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
-  let wordChar;
-  try {
-      wordChar = /*@__PURE__*/new RegExp("[\\p{Alphabetic}\\p{Number}_]", "u");
+  const C$2 = "\u037c";
+  const COUNT = typeof Symbol == "undefined" ? "__" + C$2 : Symbol.for(C$2);
+  const SET = typeof Symbol == "undefined" ? "__styleSet" + Math.floor(Math.random() * 1e8) : Symbol("styleSet");
+  const top = typeof globalThis != "undefined" ? globalThis : typeof window != "undefined" ? window : {};
+
+  // :: - Style modules encapsulate a set of CSS rules defined from
+  // JavaScript. Their definitions are only available in a given DOM
+  // root after it has been _mounted_ there with `StyleModule.mount`.
+  //
+  // Style modules should be created once and stored somewhere, as
+  // opposed to re-creating them every time you need them. The amount of
+  // CSS rules generated for a given DOM root is bounded by the amount
+  // of style modules that were used. So to avoid leaking rules, don't
+  // create these dynamically, but treat them as one-time allocations.
+  class StyleModule {
+    // :: (Object<Style>, ?{finish: ?(string) → string})
+    // Create a style module from the given spec.
+    //
+    // When `finish` is given, it is called on regular (non-`@`)
+    // selectors (after `&` expansion) to compute the final selector.
+    constructor(spec, options) {
+      this.rules = [];
+      let {finish} = options || {};
+
+      function splitSelector(selector) {
+        return /^@/.test(selector) ? [selector] : selector.split(/,\s*/)
+      }
+
+      function render(selectors, spec, target, isKeyframes) {
+        let local = [], isAt = /^@(\w+)\b/.exec(selectors[0]), keyframes = isAt && isAt[1] == "keyframes";
+        if (isAt && spec == null) return target.push(selectors[0] + ";")
+        for (let prop in spec) {
+          let value = spec[prop];
+          if (/&/.test(prop)) {
+            render(prop.split(/,\s*/).map(part => selectors.map(sel => part.replace(/&/, sel))).reduce((a, b) => a.concat(b)),
+                   value, target);
+          } else if (value && typeof value == "object") {
+            if (!isAt) throw new RangeError("The value of a property (" + prop + ") should be a primitive value.")
+            render(splitSelector(prop), value, local, keyframes);
+          } else if (value != null) {
+            local.push(prop.replace(/_.*/, "").replace(/[A-Z]/g, l => "-" + l.toLowerCase()) + ": " + value + ";");
+          }
+        }
+        if (local.length || keyframes) {
+          target.push((finish && !isAt && !isKeyframes ? selectors.map(finish) : selectors).join(", ") +
+                      " {" + local.join(" ") + "}");
+        }
+      }
+
+      for (let prop in spec) render(splitSelector(prop), spec[prop], this.rules);
+    }
+
+    // :: () → string
+    // Returns a string containing the module's CSS rules.
+    getRules() { return this.rules.join("\n") }
+
+    // :: () → string
+    // Generate a new unique CSS class name.
+    static newName() {
+      let id = top[COUNT] || 1;
+      top[COUNT] = id + 1;
+      return C$2 + id.toString(36)
+    }
+
+    // :: (union<Document, ShadowRoot>, union<[StyleModule], StyleModule>)
+    //
+    // Mount the given set of modules in the given DOM root, which ensures
+    // that the CSS rules defined by the module are available in that
+    // context.
+    //
+    // Rules are only added to the document once per root.
+    //
+    // Rule order will follow the order of the modules, so that rules from
+    // modules later in the array take precedence of those from earlier
+    // modules. If you call this function multiple times for the same root
+    // in a way that changes the order of already mounted modules, the old
+    // order will be changed.
+    static mount(root, modules) {
+      (root[SET] || new StyleSet(root)).mount(Array.isArray(modules) ? modules : [modules]);
+    }
   }
-  catch (_) { }
-  function hasWordChar(str) {
-      if (wordChar)
-          return wordChar.test(str);
-      for (let i = 0; i < str.length; i++) {
-          let ch = str[i];
-          if (/\w/.test(ch) || ch > "\x80" && (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch)))
-              return true;
+
+  let adoptedSet = null;
+
+  class StyleSet {
+    constructor(root) {
+      if (!root.head && root.adoptedStyleSheets && typeof CSSStyleSheet != "undefined") {
+        if (adoptedSet) {
+          root.adoptedStyleSheets = [adoptedSet.sheet].concat(root.adoptedStyleSheets);
+          return root[SET] = adoptedSet
+        }
+        this.sheet = new CSSStyleSheet;
+        root.adoptedStyleSheets = [this.sheet].concat(root.adoptedStyleSheets);
+        adoptedSet = this;
+      } else {
+        this.styleTag = (root.ownerDocument || root).createElement("style");
+        let target = root.head || root;
+        target.insertBefore(this.styleTag, target.firstChild);
       }
-      return false;
+      this.modules = [];
+      root[SET] = this;
+    }
+
+    mount(modules) {
+      let sheet = this.sheet;
+      let pos = 0 /* Current rule offset */, j = 0; /* Index into this.modules */
+      for (let i = 0; i < modules.length; i++) {
+        let mod = modules[i], index = this.modules.indexOf(mod);
+        if (index < j && index > -1) { // Ordering conflict
+          this.modules.splice(index, 1);
+          j--;
+          index = -1;
+        }
+        if (index == -1) {
+          this.modules.splice(j++, 0, mod);
+          if (sheet) for (let k = 0; k < mod.rules.length; k++)
+            sheet.insertRule(mod.rules[k], pos++);
+        } else {
+          while (j < index) pos += this.modules[j++].rules.length;
+          pos += mod.rules.length;
+          j++;
+        }
+      }
+
+      if (!sheet) {
+        let text = "";
+        for (let i = 0; i < this.modules.length; i++)
+          text += this.modules[i].getRules() + "\n";
+        this.styleTag.textContent = text;
+      }
+    }
   }
-  function makeCategorizer(wordChars) {
-      return (char) => {
-          if (!/\S/.test(char))
-              return CharCategory.Space;
-          if (hasWordChar(char))
-              return CharCategory.Word;
-          for (let i = 0; i < wordChars.length; i++)
-              if (char.indexOf(wordChars[i]) > -1)
-                  return CharCategory.Word;
-          return CharCategory.Other;
-      };
+
+  // Style::Object<union<Style,string>>
+  //
+  // A style is an object that, in the simple case, maps CSS property
+  // names to strings holding their values, as in `{color: "red",
+  // fontWeight: "bold"}`. The property names can be given in
+  // camel-case—the library will insert a dash before capital letters
+  // when converting them to CSS.
+  //
+  // If you include an underscore in a property name, it and everything
+  // after it will be removed from the output, which can be useful when
+  // providing a property multiple times, for browser compatibility
+  // reasons.
+  //
+  // A property in a style object can also be a sub-selector, which
+  // extends the current context to add a pseudo-selector or a child
+  // selector. Such a property should contain a `&` character, which
+  // will be replaced by the current selector. For example `{"&:before":
+  // {content: '"hi"'}}`. Sub-selectors and regular properties can
+  // freely be mixed in a given object. Any property containing a `&` is
+  // assumed to be a sub-selector.
+  //
+  // Finally, a property can specify an @-block to be wrapped around the
+  // styles defined inside the object that's the property's value. For
+  // example to create a media query you can do `{"@media screen and
+  // (min-width: 400px)": {...}}`.
+
+  var base = {
+    8: "Backspace",
+    9: "Tab",
+    10: "Enter",
+    12: "NumLock",
+    13: "Enter",
+    16: "Shift",
+    17: "Control",
+    18: "Alt",
+    20: "CapsLock",
+    27: "Escape",
+    32: " ",
+    33: "PageUp",
+    34: "PageDown",
+    35: "End",
+    36: "Home",
+    37: "ArrowLeft",
+    38: "ArrowUp",
+    39: "ArrowRight",
+    40: "ArrowDown",
+    44: "PrintScreen",
+    45: "Insert",
+    46: "Delete",
+    59: ";",
+    61: "=",
+    91: "Meta",
+    92: "Meta",
+    106: "*",
+    107: "+",
+    108: ",",
+    109: "-",
+    110: ".",
+    111: "/",
+    144: "NumLock",
+    145: "ScrollLock",
+    160: "Shift",
+    161: "Shift",
+    162: "Control",
+    163: "Control",
+    164: "Alt",
+    165: "Alt",
+    173: "-",
+    186: ";",
+    187: "=",
+    188: ",",
+    189: "-",
+    190: ".",
+    191: "/",
+    192: "`",
+    219: "[",
+    220: "\\",
+    221: "]",
+    222: "'"
+  };
+
+  var shift = {
+    48: ")",
+    49: "!",
+    50: "@",
+    51: "#",
+    52: "$",
+    53: "%",
+    54: "^",
+    55: "&",
+    56: "*",
+    57: "(",
+    59: ":",
+    61: "+",
+    173: "_",
+    186: ":",
+    187: "+",
+    188: "<",
+    189: "_",
+    190: ">",
+    191: "?",
+    192: "~",
+    219: "{",
+    220: "|",
+    221: "}",
+    222: "\""
+  };
+
+  var chrome$1 = typeof navigator != "undefined" && /Chrome\/(\d+)/.exec(navigator.userAgent);
+  var mac = typeof navigator != "undefined" && /Mac/.test(navigator.platform);
+  mac || chrome$1 && +chrome$1[1] < 57;
+
+  // Fill in the digit keys
+  for (var i$2 = 0; i$2 < 10; i$2++) base[48 + i$2] = base[96 + i$2] = String(i$2);
+
+  // The function keys
+  for (var i$2 = 1; i$2 <= 24; i$2++) base[i$2 + 111] = "F" + i$2;
+
+  // And the alphabetic keys
+  for (var i$2 = 65; i$2 <= 90; i$2++) {
+    base[i$2] = String.fromCharCode(i$2 + 32);
+    shift[i$2] = String.fromCharCode(i$2);
   }
 
-  /**
-  The editor state class is a persistent (immutable) data structure.
-  To update a state, you [create](https://codemirror.net/6/docs/ref/#state.EditorState.update) a
-  [transaction](https://codemirror.net/6/docs/ref/#state.Transaction), which produces a _new_ state
-  instance, without modifying the original object.
+  // For each code that doesn't have a shift-equivalent, copy the base name
+  for (var code in base) if (!shift.hasOwnProperty(code)) shift[code] = base[code];
 
-  As such, _never_ mutate properties of a state directly. That'll
-  just break things.
-  */
-  class EditorState {
-      constructor(
-      /**
-      @internal
-      */
-      config, 
-      /**
-      The current document.
-      */
-      doc, 
-      /**
-      The current selection.
-      */
-      selection, 
-      /**
-      @internal
-      */
-      values, computeSlot, tr) {
-          this.config = config;
-          this.doc = doc;
-          this.selection = selection;
-          this.values = values;
-          this.status = config.statusTemplate.slice();
-          this.computeSlot = computeSlot;
-          // Fill in the computed state immediately, so that further queries
-          // for it made during the update return this state
-          if (tr)
-              tr._state = this;
-          for (let i = 0; i < this.config.dynamicSlots.length; i++)
-              ensureAddr(this, i << 1);
-          this.computeSlot = null;
+  function getSelection(root) {
+      let target;
+      // Browsers differ on whether shadow roots have a getSelection
+      // method. If it exists, use that, otherwise, call it on the
+      // document.
+      if (root.nodeType == 11) { // Shadow root
+          target = root.getSelection ? root : root.ownerDocument;
       }
-      field(field, require = true) {
-          let addr = this.config.address[field.id];
-          if (addr == null) {
-              if (require)
-                  throw new RangeError("Field is not present in this state");
-              return undefined;
-          }
-          ensureAddr(this, addr);
-          return getAddr(this, addr);
+      else {
+          target = root;
       }
-      /**
-      Create a [transaction](https://codemirror.net/6/docs/ref/#state.Transaction) that updates this
-      state. Any number of [transaction specs](https://codemirror.net/6/docs/ref/#state.TransactionSpec)
-      can be passed. Unless
-      [`sequential`](https://codemirror.net/6/docs/ref/#state.TransactionSpec.sequential) is set, the
-      [changes](https://codemirror.net/6/docs/ref/#state.TransactionSpec.changes) (if any) of each spec
-      are assumed to start in the _current_ document (not the document
-      produced by previous specs), and its
-      [selection](https://codemirror.net/6/docs/ref/#state.TransactionSpec.selection) and
-      [effects](https://codemirror.net/6/docs/ref/#state.TransactionSpec.effects) are assumed to refer
-      to the document created by its _own_ changes. The resulting
-      transaction contains the combined effect of all the different
-      specs. For [selection](https://codemirror.net/6/docs/ref/#state.TransactionSpec.selection), later
-      specs take precedence over earlier ones.
-      */
-      update(...specs) {
-          return resolveTransaction(this, specs, true);
+      return target.getSelection();
+  }
+  function contains(dom, node) {
+      return node ? dom == node || dom.contains(node.nodeType != 1 ? node.parentNode : node) : false;
+  }
+  function deepActiveElement(doc) {
+      let elt = doc.activeElement;
+      while (elt && elt.shadowRoot)
+          elt = elt.shadowRoot.activeElement;
+      return elt;
+  }
+  function hasSelection(dom, selection) {
+      if (!selection.anchorNode)
+          return false;
+      try {
+          // Firefox will raise 'permission denied' errors when accessing
+          // properties of `sel.anchorNode` when it's in a generated CSS
+          // element.
+          return contains(dom, selection.anchorNode);
       }
-      /**
-      @internal
-      */
-      applyTransaction(tr) {
-          let conf = this.config, { base, compartments } = conf;
-          for (let effect of tr.effects) {
-              if (effect.is(Compartment.reconfigure)) {
-                  if (conf) {
-                      compartments = new Map;
-                      conf.compartments.forEach((val, key) => compartments.set(key, val));
-                      conf = null;
-                  }
-                  compartments.set(effect.value.compartment, effect.value.extension);
-              }
-              else if (effect.is(StateEffect.reconfigure)) {
-                  conf = null;
-                  base = effect.value;
-              }
-              else if (effect.is(StateEffect.appendConfig)) {
-                  conf = null;
-                  base = asArray(base).concat(effect.value);
-              }
+      catch (_) {
+          return false;
+      }
+  }
+  function clientRectsFor(dom) {
+      if (dom.nodeType == 3)
+          return textRange(dom, 0, dom.nodeValue.length).getClientRects();
+      else if (dom.nodeType == 1)
+          return dom.getClientRects();
+      else
+          return [];
+  }
+  // Scans forward and backward through DOM positions equivalent to the
+  // given one to see if the two are in the same place (i.e. after a
+  // text node vs at the end of that text node)
+  function isEquivalentPosition(node, off, targetNode, targetOff) {
+      return targetNode ? (scanFor(node, off, targetNode, targetOff, -1) ||
+          scanFor(node, off, targetNode, targetOff, 1)) : false;
+  }
+  function domIndex(node) {
+      for (var index = 0;; index++) {
+          node = node.previousSibling;
+          if (!node)
+              return index;
+      }
+  }
+  function scanFor(node, off, targetNode, targetOff, dir) {
+      for (;;) {
+          if (node == targetNode && off == targetOff)
+              return true;
+          if (off == (dir < 0 ? 0 : maxOffset(node))) {
+              if (node.nodeName == "DIV")
+                  return false;
+              let parent = node.parentNode;
+              if (!parent || parent.nodeType != 1)
+                  return false;
+              off = domIndex(node) + (dir < 0 ? 0 : 1);
+              node = parent;
           }
-          let startValues;
-          if (!conf) {
-              conf = Configuration.resolve(base, compartments, this);
-              let intermediateState = new EditorState(conf, this.doc, this.selection, conf.dynamicSlots.map(() => null), (state, slot) => slot.reconfigure(state, this), null);
-              startValues = intermediateState.values;
+          else if (node.nodeType == 1) {
+              node = node.childNodes[off + (dir < 0 ? -1 : 0)];
+              if (node.nodeType == 1 && node.contentEditable == "false")
+                  return false;
+              off = dir < 0 ? maxOffset(node) : 0;
           }
           else {
-              startValues = tr.startState.values.slice();
-          }
-          new EditorState(conf, tr.newDoc, tr.newSelection, startValues, (state, slot) => slot.update(state, tr), tr);
-      }
-      /**
-      Create a [transaction spec](https://codemirror.net/6/docs/ref/#state.TransactionSpec) that
-      replaces every selection range with the given content.
-      */
-      replaceSelection(text) {
-          if (typeof text == "string")
-              text = this.toText(text);
-          return this.changeByRange(range => ({ changes: { from: range.from, to: range.to, insert: text },
-              range: EditorSelection.cursor(range.from + text.length) }));
-      }
-      /**
-      Create a set of changes and a new selection by running the given
-      function for each range in the active selection. The function
-      can return an optional set of changes (in the coordinate space
-      of the start document), plus an updated range (in the coordinate
-      space of the document produced by the call's own changes). This
-      method will merge all the changes and ranges into a single
-      changeset and selection, and return it as a [transaction
-      spec](https://codemirror.net/6/docs/ref/#state.TransactionSpec), which can be passed to
-      [`update`](https://codemirror.net/6/docs/ref/#state.EditorState.update).
-      */
-      changeByRange(f) {
-          let sel = this.selection;
-          let result1 = f(sel.ranges[0]);
-          let changes = this.changes(result1.changes), ranges = [result1.range];
-          let effects = asArray(result1.effects);
-          for (let i = 1; i < sel.ranges.length; i++) {
-              let result = f(sel.ranges[i]);
-              let newChanges = this.changes(result.changes), newMapped = newChanges.map(changes);
-              for (let j = 0; j < i; j++)
-                  ranges[j] = ranges[j].map(newMapped);
-              let mapBy = changes.mapDesc(newChanges, true);
-              ranges.push(result.range.map(mapBy));
-              changes = changes.compose(newMapped);
-              effects = StateEffect.mapEffects(effects, newMapped).concat(StateEffect.mapEffects(asArray(result.effects), mapBy));
+              return false;
           }
-          return {
-              changes,
-              selection: EditorSelection.create(ranges, sel.mainIndex),
-              effects
-          };
-      }
-      /**
-      Create a [change set](https://codemirror.net/6/docs/ref/#state.ChangeSet) from the given change
-      description, taking the state's document length and line
-      separator into account.
-      */
-      changes(spec = []) {
-          if (spec instanceof ChangeSet)
-              return spec;
-          return ChangeSet.of(spec, this.doc.length, this.facet(EditorState.lineSeparator));
-      }
-      /**
-      Using the state's [line
-      separator](https://codemirror.net/6/docs/ref/#state.EditorState^lineSeparator), create a
-      [`Text`](https://codemirror.net/6/docs/ref/#state.Text) instance from the given string.
-      */
-      toText(string) {
-          return Text$1.of(string.split(this.facet(EditorState.lineSeparator) || DefaultSplit));
       }
-      /**
-      Return the given range of the document as a string.
-      */
-      sliceDoc(from = 0, to = this.doc.length) {
-          return this.doc.sliceString(from, to, this.lineBreak);
-      }
-      /**
-      Get the value of a state [facet](https://codemirror.net/6/docs/ref/#state.Facet).
-      */
-      facet(facet) {
-          let addr = this.config.address[facet.id];
-          if (addr == null)
-              return facet.default;
-          ensureAddr(this, addr);
-          return getAddr(this, addr);
-      }
-      /**
-      Convert this state to a JSON-serializable object. When custom
-      fields should be serialized, you can pass them in as an object
-      mapping property names (in the resulting object, which should
-      not use `doc` or `selection`) to fields.
-      */
-      toJSON(fields) {
-          let result = {
-              doc: this.sliceDoc(),
-              selection: this.selection.toJSON()
-          };
-          if (fields)
-              for (let prop in fields) {
-                  let value = fields[prop];
-                  if (value instanceof StateField && this.config.address[value.id] != null)
-                      result[prop] = value.spec.toJSON(this.field(fields[prop]), this);
+  }
+  function maxOffset(node) {
+      return node.nodeType == 3 ? node.nodeValue.length : node.childNodes.length;
+  }
+  function flattenRect(rect, left) {
+      let x = left ? rect.left : rect.right;
+      return { left: x, right: x, top: rect.top, bottom: rect.bottom };
+  }
+  function windowRect(win) {
+      return { left: 0, right: win.innerWidth,
+          top: 0, bottom: win.innerHeight };
+  }
+  function scrollRectIntoView(dom, rect, side, x, y, xMargin, yMargin, ltr) {
+      let doc = dom.ownerDocument, win = doc.defaultView || window;
+      for (let cur = dom; cur;) {
+          if (cur.nodeType == 1) { // Element
+              let bounding, top = cur == doc.body;
+              if (top) {
+                  bounding = windowRect(win);
               }
-          return result;
-      }
-      /**
-      Deserialize a state from its JSON representation. When custom
-      fields should be deserialized, pass the same object you passed
-      to [`toJSON`](https://codemirror.net/6/docs/ref/#state.EditorState.toJSON) when serializing as
-      third argument.
-      */
-      static fromJSON(json, config = {}, fields) {
-          if (!json || typeof json.doc != "string")
-              throw new RangeError("Invalid JSON representation for EditorState");
-          let fieldInit = [];
-          if (fields)
-              for (let prop in fields) {
-                  if (Object.prototype.hasOwnProperty.call(json, prop)) {
-                      let field = fields[prop], value = json[prop];
-                      fieldInit.push(field.init(state => field.spec.fromJSON(value, state)));
+              else {
+                  if (cur.scrollHeight <= cur.clientHeight && cur.scrollWidth <= cur.clientWidth) {
+                      cur = cur.assignedSlot || cur.parentNode;
+                      continue;
                   }
+                  let rect = cur.getBoundingClientRect();
+                  // Make sure scrollbar width isn't included in the rectangle
+                  bounding = { left: rect.left, right: rect.left + cur.clientWidth,
+                      top: rect.top, bottom: rect.top + cur.clientHeight };
               }
-          return EditorState.create({
-              doc: json.doc,
-              selection: EditorSelection.fromJSON(json.selection),
-              extensions: config.extensions ? fieldInit.concat([config.extensions]) : fieldInit
-          });
-      }
-      /**
-      Create a new state. You'll usually only need this when
-      initializing an editor—updated states are created by applying
-      transactions.
-      */
-      static create(config = {}) {
-          let configuration = Configuration.resolve(config.extensions || [], new Map);
-          let doc = config.doc instanceof Text$1 ? config.doc
-              : Text$1.of((config.doc || "").split(configuration.staticFacet(EditorState.lineSeparator) || DefaultSplit));
-          let selection = !config.selection ? EditorSelection.single(0)
-              : config.selection instanceof EditorSelection ? config.selection
-                  : EditorSelection.single(config.selection.anchor, config.selection.head);
-          checkSelection(selection, doc.length);
-          if (!configuration.staticFacet(allowMultipleSelections))
-              selection = selection.asSingle();
-          return new EditorState(configuration, doc, selection, configuration.dynamicSlots.map(() => null), (state, slot) => slot.create(state), null);
-      }
-      /**
-      The size (in columns) of a tab in the document, determined by
-      the [`tabSize`](https://codemirror.net/6/docs/ref/#state.EditorState^tabSize) facet.
-      */
-      get tabSize() { return this.facet(EditorState.tabSize); }
-      /**
-      Get the proper [line-break](https://codemirror.net/6/docs/ref/#state.EditorState^lineSeparator)
-      string for this state.
-      */
-      get lineBreak() { return this.facet(EditorState.lineSeparator) || "\n"; }
-      /**
-      Returns true when the editor is
-      [configured](https://codemirror.net/6/docs/ref/#state.EditorState^readOnly) to be read-only.
-      */
-      get readOnly() { return this.facet(readOnly); }
-      /**
-      Look up a translation for the given phrase (via the
-      [`phrases`](https://codemirror.net/6/docs/ref/#state.EditorState^phrases) facet), or return the
-      original string if no translation is found.
-      
-      If additional arguments are passed, they will be inserted in
-      place of markers like `$1` (for the first value) and `$2`, etc.
-      A single `$` is equivalent to `$1`, and `$$` will produce a
-      literal dollar sign.
-      */
-      phrase(phrase, ...insert) {
-          for (let map of this.facet(EditorState.phrases))
-              if (Object.prototype.hasOwnProperty.call(map, phrase)) {
-                  phrase = map[phrase];
-                  break;
+              let moveX = 0, moveY = 0;
+              if (y == "nearest") {
+                  if (rect.top < bounding.top) {
+                      moveY = -(bounding.top - rect.top + yMargin);
+                      if (side > 0 && rect.bottom > bounding.bottom + moveY)
+                          moveY = rect.bottom - bounding.bottom + moveY + yMargin;
+                  }
+                  else if (rect.bottom > bounding.bottom) {
+                      moveY = rect.bottom - bounding.bottom + yMargin;
+                      if (side < 0 && (rect.top - moveY) < bounding.top)
+                          moveY = -(bounding.top + moveY - rect.top + yMargin);
+                  }
               }
-          if (insert.length)
-              phrase = phrase.replace(/\$(\$|\d*)/g, (m, i) => {
-                  if (i == "$")
-                      return "$";
-                  let n = +(i || 1);
-                  return !n || n > insert.length ? m : insert[n - 1];
-              });
-          return phrase;
-      }
-      /**
-      Find the values for a given language data field, provided by the
-      the [`languageData`](https://codemirror.net/6/docs/ref/#state.EditorState^languageData) facet.
-      
-      Examples of language data fields are...
-      
-      - [`"commentTokens"`](https://codemirror.net/6/docs/ref/#commands.CommentTokens) for specifying
-        comment syntax.
-      - [`"autocomplete"`](https://codemirror.net/6/docs/ref/#autocomplete.autocompletion^config.override)
-        for providing language-specific completion sources.
-      - [`"wordChars"`](https://codemirror.net/6/docs/ref/#state.EditorState.charCategorizer) for adding
-        characters that should be considered part of words in this
-        language.
-      - [`"closeBrackets"`](https://codemirror.net/6/docs/ref/#autocomplete.CloseBracketConfig) controls
-        bracket closing behavior.
-      */
-      languageDataAt(name, pos, side = -1) {
-          let values = [];
-          for (let provider of this.facet(languageData)) {
-              for (let result of provider(this, pos, side)) {
-                  if (Object.prototype.hasOwnProperty.call(result, name))
-                      values.push(result[name]);
+              else {
+                  let rectHeight = rect.bottom - rect.top, boundingHeight = bounding.bottom - bounding.top;
+                  let targetTop = y == "center" && rectHeight <= boundingHeight ? rect.top + rectHeight / 2 - boundingHeight / 2 :
+                      y == "start" || y == "center" && side < 0 ? rect.top - yMargin :
+                          rect.bottom - boundingHeight + yMargin;
+                  moveY = targetTop - bounding.top;
               }
-          }
-          return values;
-      }
-      /**
-      Return a function that can categorize strings (expected to
-      represent a single [grapheme cluster](https://codemirror.net/6/docs/ref/#state.findClusterBreak))
-      into one of:
-      
-       - Word (contains an alphanumeric character or a character
-         explicitly listed in the local language's `"wordChars"`
-         language data, which should be a string)
-       - Space (contains only whitespace)
-       - Other (anything else)
-      */
-      charCategorizer(at) {
-          return makeCategorizer(this.languageDataAt("wordChars", at).join(""));
-      }
-      /**
-      Find the word at the given position, meaning the range
-      containing all [word](https://codemirror.net/6/docs/ref/#state.CharCategory.Word) characters
-      around it. If no word characters are adjacent to the position,
-      this returns null.
-      */
-      wordAt(pos) {
-          let { text, from, length } = this.doc.lineAt(pos);
-          let cat = this.charCategorizer(pos);
-          let start = pos - from, end = pos - from;
-          while (start > 0) {
-              let prev = findClusterBreak(text, start, false);
-              if (cat(text.slice(prev, start)) != CharCategory.Word)
+              if (x == "nearest") {
+                  if (rect.left < bounding.left) {
+                      moveX = -(bounding.left - rect.left + xMargin);
+                      if (side > 0 && rect.right > bounding.right + moveX)
+                          moveX = rect.right - bounding.right + moveX + xMargin;
+                  }
+                  else if (rect.right > bounding.right) {
+                      moveX = rect.right - bounding.right + xMargin;
+                      if (side < 0 && rect.left < bounding.left + moveX)
+                          moveX = -(bounding.left + moveX - rect.left + xMargin);
+                  }
+              }
+              else {
+                  let targetLeft = x == "center" ? rect.left + (rect.right - rect.left) / 2 - (bounding.right - bounding.left) / 2 :
+                      (x == "start") == ltr ? rect.left - xMargin :
+                          rect.right - (bounding.right - bounding.left) + xMargin;
+                  moveX = targetLeft - bounding.left;
+              }
+              if (moveX || moveY) {
+                  if (top) {
+                      win.scrollBy(moveX, moveY);
+                  }
+                  else {
+                      let movedX = 0, movedY = 0;
+                      if (moveY) {
+                          let start = cur.scrollTop;
+                          cur.scrollTop += moveY;
+                          movedY = cur.scrollTop - start;
+                      }
+                      if (moveX) {
+                          let start = cur.scrollLeft;
+                          cur.scrollLeft += moveX;
+                          movedX = cur.scrollLeft - start;
+                      }
+                      rect = { left: rect.left - movedX, top: rect.top - movedY,
+                          right: rect.right - movedX, bottom: rect.bottom - movedY };
+                      if (movedX && Math.abs(movedX - moveX) < 1)
+                          x = "nearest";
+                      if (movedY && Math.abs(movedY - moveY) < 1)
+                          y = "nearest";
+                  }
+              }
+              if (top)
                   break;
-              start = prev;
+              cur = cur.assignedSlot || cur.parentNode;
           }
-          while (end < length) {
-              let next = findClusterBreak(text, end);
-              if (cat(text.slice(end, next)) != CharCategory.Word)
-                  break;
-              end = next;
+          else if (cur.nodeType == 11) { // A shadow root
+              cur = cur.host;
+          }
+          else {
+              break;
           }
-          return start == end ? null : EditorSelection.range(start + from, end + from);
       }
   }
-  /**
-  A facet that, when enabled, causes the editor to allow multiple
-  ranges to be selected. Be careful though, because by default the
-  editor relies on the native DOM selection, which cannot handle
-  multiple selections. An extension like
-  [`drawSelection`](https://codemirror.net/6/docs/ref/#view.drawSelection) can be used to make
-  secondary selections visible to the user.
-  */
-  EditorState.allowMultipleSelections = allowMultipleSelections;
-  /**
-  Configures the tab size to use in this state. The first
-  (highest-precedence) value of the facet is used. If no value is
-  given, this defaults to 4.
-  */
-  EditorState.tabSize = /*@__PURE__*/Facet.define({
-      combine: values => values.length ? values[0] : 4
-  });
-  /**
-  The line separator to use. By default, any of `"\n"`, `"\r\n"`
-  and `"\r"` is treated as a separator when splitting lines, and
-  lines are joined with `"\n"`.
-
-  When you configure a value here, only that precise separator
-  will be used, allowing you to round-trip documents through the
-  editor without normalizing line separators.
-  */
-  EditorState.lineSeparator = lineSeparator;
-  /**
-  This facet controls the value of the
-  [`readOnly`](https://codemirror.net/6/docs/ref/#state.EditorState.readOnly) getter, which is
-  consulted by commands and extensions that implement editing
-  functionality to determine whether they should apply. It
-  defaults to false, but when its highest-precedence value is
-  `true`, such functionality disables itself.
-
-  Not to be confused with
-  [`EditorView.editable`](https://codemirror.net/6/docs/ref/#view.EditorView^editable), which
-  controls whether the editor's DOM is set to be editable (and
-  thus focusable).
-  */
-  EditorState.readOnly = readOnly;
-  /**
-  Registers translation phrases. The
-  [`phrase`](https://codemirror.net/6/docs/ref/#state.EditorState.phrase) method will look through
-  all objects registered with this facet to find translations for
-  its argument.
-  */
-  EditorState.phrases = /*@__PURE__*/Facet.define({
-      compare(a, b) {
-          let kA = Object.keys(a), kB = Object.keys(b);
-          return kA.length == kB.length && kA.every(k => a[k] == b[k]);
-      }
-  });
-  /**
-  A facet used to register [language
-  data](https://codemirror.net/6/docs/ref/#state.EditorState.languageDataAt) providers.
-  */
-  EditorState.languageData = languageData;
-  /**
-  Facet used to register change filters, which are called for each
-  transaction (unless explicitly
-  [disabled](https://codemirror.net/6/docs/ref/#state.TransactionSpec.filter)), and can suppress
-  part of the transaction's changes.
-
-  Such a function can return `true` to indicate that it doesn't
-  want to do anything, `false` to completely stop the changes in
-  the transaction, or a set of ranges in which changes should be
-  suppressed. Such ranges are represented as an array of numbers,
-  with each pair of two numbers indicating the start and end of a
-  range. So for example `[10, 20, 100, 110]` suppresses changes
-  between 10 and 20, and between 100 and 110.
-  */
-  EditorState.changeFilter = changeFilter;
-  /**
-  Facet used to register a hook that gets a chance to update or
-  replace transaction specs before they are applied. This will
-  only be applied for transactions that don't have
-  [`filter`](https://codemirror.net/6/docs/ref/#state.TransactionSpec.filter) set to `false`. You
-  can either return a single transaction spec (possibly the input
-  transaction), or an array of specs (which will be combined in
-  the same way as the arguments to
-  [`EditorState.update`](https://codemirror.net/6/docs/ref/#state.EditorState.update)).
-
-  When possible, it is recommended to avoid accessing
-  [`Transaction.state`](https://codemirror.net/6/docs/ref/#state.Transaction.state) in a filter,
-  since it will force creation of a state that will then be
-  discarded again, if the transaction is actually filtered.
-
-  (This functionality should be used with care. Indiscriminately
-  modifying transaction is likely to break something or degrade
-  the user experience.)
-  */
-  EditorState.transactionFilter = transactionFilter;
-  /**
-  This is a more limited form of
-  [`transactionFilter`](https://codemirror.net/6/docs/ref/#state.EditorState^transactionFilter),
-  which can only add
-  [annotations](https://codemirror.net/6/docs/ref/#state.TransactionSpec.annotations) and
-  [effects](https://codemirror.net/6/docs/ref/#state.TransactionSpec.effects). _But_, this type
-  of filter runs even if the transaction has disabled regular
-  [filtering](https://codemirror.net/6/docs/ref/#state.TransactionSpec.filter), making it suitable
-  for effects that don't need to touch the changes or selection,
-  but do want to process every transaction.
-
-  Extenders run _after_ filters, when both are present.
-  */
-  EditorState.transactionExtender = transactionExtender;
-  Compartment.reconfigure = /*@__PURE__*/StateEffect.define();
-
-  /**
-  Utility function for combining behaviors to fill in a config
-  object from an array of provided configs. `defaults` should hold
-  default values for all optional fields in `Config`.
-
-  The function will, by default, error
-  when a field gets two values that aren't `===`-equal, but you can
-  provide combine functions per field to do something else.
-  */
-  function combineConfig(configs, defaults, // Should hold only the optional properties of Config, but I haven't managed to express that
-  combine = {}) {
-      let result = {};
-      for (let config of configs)
-          for (let key of Object.keys(config)) {
-              let value = config[key], current = result[key];
-              if (current === undefined)
-                  result[key] = value;
-              else if (current === value || value === undefined) ; // No conflict
-              else if (Object.hasOwnProperty.call(combine, key))
-                  result[key] = combine[key](current, value);
-              else
-                  throw new Error("Config merge conflict for field " + key);
+  function scrollableParent(dom) {
+      let doc = dom.ownerDocument;
+      for (let cur = dom.parentNode; cur;) {
+          if (cur == doc.body) {
+              break;
           }
-      for (let key in defaults)
-          if (result[key] === undefined)
-              result[key] = defaults[key];
-      return result;
+          else if (cur.nodeType == 1) {
+              if (cur.scrollHeight > cur.clientHeight || cur.scrollWidth > cur.clientWidth)
+                  return cur;
+              cur = cur.assignedSlot || cur.parentNode;
+          }
+          else if (cur.nodeType == 11) {
+              cur = cur.host;
+          }
+          else {
+              break;
+          }
+      }
+      return null;
   }
-
-  /**
-  Each range is associated with a value, which must inherit from
-  this class.
-  */
-  class RangeValue {
-      /**
-      Compare this value with another value. Used when comparing
-      rangesets. The default implementation compares by identity.
-      Unless you are only creating a fixed number of unique instances
-      of your value type, it is a good idea to implement this
-      properly.
-      */
-      eq(other) { return this == other; }
-      /**
-      Create a [range](https://codemirror.net/6/docs/ref/#state.Range) with this value.
-      */
-      range(from, to = from) { return Range.create(from, to, this); }
+  class DOMSelectionState {
+      constructor() {
+          this.anchorNode = null;
+          this.anchorOffset = 0;
+          this.focusNode = null;
+          this.focusOffset = 0;
+      }
+      eq(domSel) {
+          return this.anchorNode == domSel.anchorNode && this.anchorOffset == domSel.anchorOffset &&
+              this.focusNode == domSel.focusNode && this.focusOffset == domSel.focusOffset;
+      }
+      setRange(range) {
+          let { anchorNode, focusNode } = range;
+          // Clip offsets to node size to avoid crashes when Safari reports bogus offsets (#1152)
+          this.set(anchorNode, Math.min(range.anchorOffset, anchorNode ? maxOffset(anchorNode) : 0), focusNode, Math.min(range.focusOffset, focusNode ? maxOffset(focusNode) : 0));
+      }
+      set(anchorNode, anchorOffset, focusNode, focusOffset) {
+          this.anchorNode = anchorNode;
+          this.anchorOffset = anchorOffset;
+          this.focusNode = focusNode;
+          this.focusOffset = focusOffset;
+      }
   }
-  RangeValue.prototype.startSide = RangeValue.prototype.endSide = 0;
-  RangeValue.prototype.point = false;
-  RangeValue.prototype.mapMode = MapMode.TrackDel;
-  /**
-  A range associates a value with a range of positions.
-  */
-  class Range {
-      constructor(
-      /**
-      The range's start position.
-      */
-      from, 
-      /**
-      Its end position.
-      */
-      to, 
-      /**
-      The value associated with this range.
-      */
-      value) {
-          this.from = from;
-          this.to = to;
-          this.value = value;
+  let preventScrollSupported = null;
+  // Feature-detects support for .focus({preventScroll: true}), and uses
+  // a fallback kludge when not supported.
+  function focusPreventScroll(dom) {
+      if (dom.setActive)
+          return dom.setActive(); // in IE
+      if (preventScrollSupported)
+          return dom.focus(preventScrollSupported);
+      let stack = [];
+      for (let cur = dom; cur; cur = cur.parentNode) {
+          stack.push(cur, cur.scrollTop, cur.scrollLeft);
+          if (cur == cur.ownerDocument)
+              break;
       }
-      /**
-      @internal
-      */
-      static create(from, to, value) {
-          return new Range(from, to, value);
+      dom.focus(preventScrollSupported == null ? {
+          get preventScroll() {
+              preventScrollSupported = { preventScroll: true };
+              return true;
+          }
+      } : undefined);
+      if (!preventScrollSupported) {
+          preventScrollSupported = false;
+          for (let i = 0; i < stack.length;) {
+              let elt = stack[i++], top = stack[i++], left = stack[i++];
+              if (elt.scrollTop != top)
+                  elt.scrollTop = top;
+              if (elt.scrollLeft != left)
+                  elt.scrollLeft = left;
+          }
       }
   }
-  function cmpRange(a, b) {
-      return a.from - b.from || a.value.startSide - b.value.startSide;
+  let scratchRange;
+  function textRange(node, from, to = from) {
+      let range = scratchRange || (scratchRange = document.createRange());
+      range.setEnd(node, to);
+      range.setStart(node, from);
+      return range;
   }
-  class Chunk {
-      constructor(from, to, value, 
-      // Chunks are marked with the largest point that occurs
-      // in them (or -1 for no points), so that scans that are
-      // only interested in points (such as the
-      // heightmap-related logic) can skip range-only chunks.
-      maxPoint) {
-          this.from = from;
-          this.to = to;
-          this.value = value;
-          this.maxPoint = maxPoint;
-      }
-      get length() { return this.to[this.to.length - 1]; }
-      // Find the index of the given position and side. Use the ranges'
-      // `from` pos when `end == false`, `to` when `end == true`.
-      findIndex(pos, side, end, startAt = 0) {
-          let arr = end ? this.to : this.from;
-          for (let lo = startAt, hi = arr.length;;) {
-              if (lo == hi)
-                  return lo;
-              let mid = (lo + hi) >> 1;
-              let diff = arr[mid] - pos || (end ? this.value[mid].endSide : this.value[mid].startSide) - side;
-              if (mid == lo)
-                  return diff >= 0 ? lo : hi;
-              if (diff >= 0)
-                  hi = mid;
-              else
-                  lo = mid + 1;
-          }
+  function dispatchKey(elt, name, code) {
+      let options = { key: name, code: name, keyCode: code, which: code, cancelable: true };
+      let down = new KeyboardEvent("keydown", options);
+      down.synthetic = true;
+      elt.dispatchEvent(down);
+      let up = new KeyboardEvent("keyup", options);
+      up.synthetic = true;
+      elt.dispatchEvent(up);
+      return down.defaultPrevented || up.defaultPrevented;
+  }
+  function getRoot(node) {
+      while (node) {
+          if (node && (node.nodeType == 9 || node.nodeType == 11 && node.host))
+              return node;
+          node = node.assignedSlot || node.parentNode;
       }
-      between(offset, from, to, f) {
-          for (let i = this.findIndex(from, -1000000000 /* C.Far */, true), e = this.findIndex(to, 1000000000 /* C.Far */, false, i); i < e; i++)
-              if (f(this.from[i] + offset, this.to[i] + offset, this.value[i]) === false)
+      return null;
+  }
+  function clearAttributes(node) {
+      while (node.attributes.length)
+          node.removeAttributeNode(node.attributes[0]);
+  }
+  function atElementStart(doc, selection) {
+      let node = selection.focusNode, offset = selection.focusOffset;
+      if (!node || selection.anchorNode != node || selection.anchorOffset != offset)
+          return false;
+      // Safari can report bogus offsets (#1152)
+      offset = Math.min(offset, maxOffset(node));
+      for (;;) {
+          if (offset) {
+              if (node.nodeType != 1)
                   return false;
-      }
-      map(offset, changes) {
-          let value = [], from = [], to = [], newPos = -1, maxPoint = -1;
-          for (let i = 0; i < this.value.length; i++) {
-              let val = this.value[i], curFrom = this.from[i] + offset, curTo = this.to[i] + offset, newFrom, newTo;
-              if (curFrom == curTo) {
-                  let mapped = changes.mapPos(curFrom, val.startSide, val.mapMode);
-                  if (mapped == null)
-                      continue;
-                  newFrom = newTo = mapped;
-                  if (val.startSide != val.endSide) {
-                      newTo = changes.mapPos(curFrom, val.endSide);
-                      if (newTo < newFrom)
-                          continue;
-                  }
-              }
+              let prev = node.childNodes[offset - 1];
+              if (prev.contentEditable == "false")
+                  offset--;
               else {
-                  newFrom = changes.mapPos(curFrom, val.startSide);
-                  newTo = changes.mapPos(curTo, val.endSide);
-                  if (newFrom > newTo || newFrom == newTo && val.startSide > 0 && val.endSide <= 0)
-                      continue;
+                  node = prev;
+                  offset = maxOffset(node);
               }
-              if ((newTo - newFrom || val.endSide - val.startSide) < 0)
-                  continue;
-              if (newPos < 0)
-                  newPos = newFrom;
-              if (val.point)
-                  maxPoint = Math.max(maxPoint, newTo - newFrom);
-              value.push(val);
-              from.push(newFrom - newPos);
-              to.push(newTo - newPos);
           }
-          return { mapped: value.length ? new Chunk(from, to, value, maxPoint) : null, pos: newPos };
+          else if (node == doc) {
+              return true;
+          }
+          else {
+              offset = domIndex(node);
+              node = node.parentNode;
+          }
       }
   }
-  /**
-  A range set stores a collection of [ranges](https://codemirror.net/6/docs/ref/#state.Range) in a
-  way that makes them efficient to [map](https://codemirror.net/6/docs/ref/#state.RangeSet.map) and
-  [update](https://codemirror.net/6/docs/ref/#state.RangeSet.update). This is an immutable data
-  structure.
-  */
-  class RangeSet {
-      constructor(
-      /**
-      @internal
-      */
-      chunkPos, 
-      /**
-      @internal
-      */
-      chunk, 
-      /**
-      @internal
-      */
-      nextLayer, 
-      /**
-      @internal
-      */
-      maxPoint) {
-          this.chunkPos = chunkPos;
-          this.chunk = chunk;
-          this.nextLayer = nextLayer;
-          this.maxPoint = maxPoint;
+
+  class DOMPos {
+      constructor(node, offset, precise = true) {
+          this.node = node;
+          this.offset = offset;
+          this.precise = precise;
       }
-      /**
-      @internal
-      */
-      static create(chunkPos, chunk, nextLayer, maxPoint) {
-          return new RangeSet(chunkPos, chunk, nextLayer, maxPoint);
+      static before(dom, precise) { return new DOMPos(dom.parentNode, domIndex(dom), precise); }
+      static after(dom, precise) { return new DOMPos(dom.parentNode, domIndex(dom) + 1, precise); }
+  }
+  const noChildren = [];
+  class ContentView {
+      constructor() {
+          this.parent = null;
+          this.dom = null;
+          this.dirty = 2 /* Node */;
       }
-      /**
-      @internal
-      */
-      get length() {
-          let last = this.chunk.length - 1;
-          return last < 0 ? 0 : Math.max(this.chunkEnd(last), this.nextLayer.length);
+      get overrideDOMText() { return null; }
+      get posAtStart() {
+          return this.parent ? this.parent.posBefore(this) : 0;
       }
-      /**
-      The number of ranges in the set.
-      */
-      get size() {
-          if (this.isEmpty)
-              return 0;
-          let size = this.nextLayer.size;
-          for (let chunk of this.chunk)
-              size += chunk.value.length;
-          return size;
+      get posAtEnd() {
+          return this.posAtStart + this.length;
       }
-      /**
-      @internal
-      */
-      chunkEnd(index) {
-          return this.chunkPos[index] + this.chunk[index].length;
+      posBefore(view) {
+          let pos = this.posAtStart;
+          for (let child of this.children) {
+              if (child == view)
+                  return pos;
+              pos += child.length + child.breakAfter;
+          }
+          throw new RangeError("Invalid child in posBefore");
       }
-      /**
-      Update the range set, optionally adding new ranges or filtering
-      out existing ones.
-      
-      (Note: The type parameter is just there as a kludge to work
-      around TypeScript variance issues that prevented `RangeSet<X>`
-      from being a subtype of `RangeSet<Y>` when `X` is a subtype of
-      `Y`.)
-      */
-      update(updateSpec) {
-          let { add = [], sort = false, filterFrom = 0, filterTo = this.length } = updateSpec;
-          let filter = updateSpec.filter;
-          if (add.length == 0 && !filter)
-              return this;
-          if (sort)
-              add = add.slice().sort(cmpRange);
-          if (this.isEmpty)
-              return add.length ? RangeSet.of(add) : this;
-          let cur = new LayerCursor(this, null, -1).goto(0), i = 0, spill = [];
-          let builder = new RangeSetBuilder();
-          while (cur.value || i < add.length) {
-              if (i < add.length && (cur.from - add[i].from || cur.startSide - add[i].value.startSide) >= 0) {
-                  let range = add[i++];
-                  if (!builder.addInner(range.from, range.to, range.value))
-                      spill.push(range);
-              }
-              else if (cur.rangeIndex == 1 && cur.chunkIndex < this.chunk.length &&
-                  (i == add.length || this.chunkEnd(cur.chunkIndex) < add[i].from) &&
-                  (!filter || filterFrom > this.chunkEnd(cur.chunkIndex) || filterTo < this.chunkPos[cur.chunkIndex]) &&
-                  builder.addChunk(this.chunkPos[cur.chunkIndex], this.chunk[cur.chunkIndex])) {
-                  cur.nextChunk();
+      posAfter(view) {
+          return this.posBefore(view) + view.length;
+      }
+      sync(view, track) {
+          if (this.dirty & 2 /* Node */) {
+              let parent = this.dom;
+              let prev = null, next;
+              for (let child of this.children) {
+                  if (child.dirty) {
+                      if (!child.dom && (next = prev ? prev.nextSibling : parent.firstChild)) {
+                          let contentView = ContentView.get(next);
+                          if (!contentView || !contentView.parent && contentView.canReuseDOM(child))
+                              child.reuseDOM(next);
+                      }
+                      child.sync(view, track);
+                      child.dirty = 0 /* Not */;
+                  }
+                  next = prev ? prev.nextSibling : parent.firstChild;
+                  if (track && !track.written && track.node == parent && next != child.dom)
+                      track.written = true;
+                  if (child.dom.parentNode == parent) {
+                      while (next && next != child.dom)
+                          next = rm$1(next);
+                  }
+                  else {
+                      parent.insertBefore(child.dom, next);
+                  }
+                  prev = child.dom;
               }
-              else {
-                  if (!filter || filterFrom > cur.to || filterTo < cur.from || filter(cur.from, cur.to, cur.value)) {
-                      if (!builder.addInner(cur.from, cur.to, cur.value))
-                          spill.push(Range.create(cur.from, cur.to, cur.value));
+              next = prev ? prev.nextSibling : parent.firstChild;
+              if (next && track && track.node == parent)
+                  track.written = true;
+              while (next)
+                  next = rm$1(next);
+          }
+          else if (this.dirty & 1 /* Child */) {
+              for (let child of this.children)
+                  if (child.dirty) {
+                      child.sync(view, track);
+                      child.dirty = 0 /* Not */;
                   }
-                  cur.next();
+          }
+      }
+      reuseDOM(_dom) { }
+      localPosFromDOM(node, offset) {
+          let after;
+          if (node == this.dom) {
+              after = this.dom.childNodes[offset];
+          }
+          else {
+              let bias = maxOffset(node) == 0 ? 0 : offset == 0 ? -1 : 1;
+              for (;;) {
+                  let parent = node.parentNode;
+                  if (parent == this.dom)
+                      break;
+                  if (bias == 0 && parent.firstChild != parent.lastChild) {
+                      if (node == parent.firstChild)
+                          bias = -1;
+                      else
+                          bias = 1;
+                  }
+                  node = parent;
               }
+              if (bias < 0)
+                  after = node;
+              else
+                  after = node.nextSibling;
+          }
+          if (after == this.dom.firstChild)
+              return 0;
+          while (after && !ContentView.get(after))
+              after = after.nextSibling;
+          if (!after)
+              return this.length;
+          for (let i = 0, pos = 0;; i++) {
+              let child = this.children[i];
+              if (child.dom == after)
+                  return pos;
+              pos += child.length + child.breakAfter;
           }
-          return builder.finishInner(this.nextLayer.isEmpty && !spill.length ? RangeSet.empty
-              : this.nextLayer.update({ add: spill, filter, filterFrom, filterTo }));
       }
-      /**
-      Map this range set through a set of changes, return the new set.
-      */
-      map(changes) {
-          if (changes.empty || this.isEmpty)
-              return this;
-          let chunks = [], chunkPos = [], maxPoint = -1;
-          for (let i = 0; i < this.chunk.length; i++) {
-              let start = this.chunkPos[i], chunk = this.chunk[i];
-              let touch = changes.touchesRange(start, start + chunk.length);
-              if (touch === false) {
-                  maxPoint = Math.max(maxPoint, chunk.maxPoint);
-                  chunks.push(chunk);
-                  chunkPos.push(changes.mapPos(start));
+      domBoundsAround(from, to, offset = 0) {
+          let fromI = -1, fromStart = -1, toI = -1, toEnd = -1;
+          for (let i = 0, pos = offset, prevEnd = offset; i < this.children.length; i++) {
+              let child = this.children[i], end = pos + child.length;
+              if (pos < from && end > to)
+                  return child.domBoundsAround(from, to, pos);
+              if (end >= from && fromI == -1) {
+                  fromI = i;
+                  fromStart = pos;
               }
-              else if (touch === true) {
-                  let { mapped, pos } = chunk.map(start, changes);
-                  if (mapped) {
-                      maxPoint = Math.max(maxPoint, mapped.maxPoint);
-                      chunks.push(mapped);
-                      chunkPos.push(pos);
-                  }
+              if (pos > to && child.dom.parentNode == this.dom) {
+                  toI = i;
+                  toEnd = prevEnd;
+                  break;
               }
+              prevEnd = end;
+              pos = end + child.breakAfter;
           }
-          let next = this.nextLayer.map(changes);
-          return chunks.length == 0 ? next : new RangeSet(chunkPos, chunks, next || RangeSet.empty, maxPoint);
+          return { from: fromStart, to: toEnd < 0 ? offset + this.length : toEnd,
+              startDOM: (fromI ? this.children[fromI - 1].dom.nextSibling : null) || this.dom.firstChild,
+              endDOM: toI < this.children.length && toI >= 0 ? this.children[toI].dom : null };
       }
-      /**
-      Iterate over the ranges that touch the region `from` to `to`,
-      calling `f` for each. There is no guarantee that the ranges will
-      be reported in any specific order. When the callback returns
-      `false`, iteration stops.
-      */
-      between(from, to, f) {
-          if (this.isEmpty)
-              return;
-          for (let i = 0; i < this.chunk.length; i++) {
-              let start = this.chunkPos[i], chunk = this.chunk[i];
-              if (to >= start && from <= start + chunk.length &&
-                  chunk.between(start, from - start, to - start, f) === false)
+      markDirty(andParent = false) {
+          this.dirty |= 2 /* Node */;
+          this.markParentsDirty(andParent);
+      }
+      markParentsDirty(childList) {
+          for (let parent = this.parent; parent; parent = parent.parent) {
+              if (childList)
+                  parent.dirty |= 2 /* Node */;
+              if (parent.dirty & 1 /* Child */)
                   return;
+              parent.dirty |= 1 /* Child */;
+              childList = false;
           }
-          this.nextLayer.between(from, to, f);
-      }
-      /**
-      Iterate over the ranges in this set, in order, including all
-      ranges that end at or after `from`.
-      */
-      iter(from = 0) {
-          return HeapCursor.from([this]).goto(from);
       }
-      /**
-      @internal
-      */
-      get isEmpty() { return this.nextLayer == this; }
-      /**
-      Iterate over the ranges in a collection of sets, in order,
-      starting from `from`.
-      */
-      static iter(sets, from = 0) {
-          return HeapCursor.from(sets).goto(from);
+      setParent(parent) {
+          if (this.parent != parent) {
+              this.parent = parent;
+              if (this.dirty)
+                  this.markParentsDirty(true);
+          }
       }
-      /**
-      Iterate over two groups of sets, calling methods on `comparator`
-      to notify it of possible differences.
-      */
-      static compare(oldSets, newSets, 
-      /**
-      This indicates how the underlying data changed between these
-      ranges, and is needed to synchronize the iteration. `from` and
-      `to` are coordinates in the _new_ space, after these changes.
-      */
-      textDiff, comparator, 
-      /**
-      Can be used to ignore all non-point ranges, and points below
-      the given size. When -1, all ranges are compared.
-      */
-      minPointSize = -1) {
-          let a = oldSets.filter(set => set.maxPoint > 0 || !set.isEmpty && set.maxPoint >= minPointSize);
-          let b = newSets.filter(set => set.maxPoint > 0 || !set.isEmpty && set.maxPoint >= minPointSize);
-          let sharedChunks = findSharedChunks(a, b, textDiff);
-          let sideA = new SpanCursor(a, sharedChunks, minPointSize);
-          let sideB = new SpanCursor(b, sharedChunks, minPointSize);
-          textDiff.iterGaps((fromA, fromB, length) => compare(sideA, fromA, sideB, fromB, length, comparator));
-          if (textDiff.empty && textDiff.length == 0)
-              compare(sideA, 0, sideB, 0, 0, comparator);
+      setDOM(dom) {
+          if (this.dom)
+              this.dom.cmView = null;
+          this.dom = dom;
+          dom.cmView = this;
       }
-      /**
-      Compare the contents of two groups of range sets, returning true
-      if they are equivalent in the given range.
-      */
-      static eq(oldSets, newSets, from = 0, to) {
-          if (to == null)
-              to = 1000000000 /* C.Far */ - 1;
-          let a = oldSets.filter(set => !set.isEmpty && newSets.indexOf(set) < 0);
-          let b = newSets.filter(set => !set.isEmpty && oldSets.indexOf(set) < 0);
-          if (a.length != b.length)
-              return false;
-          if (!a.length)
-              return true;
-          let sharedChunks = findSharedChunks(a, b);
-          let sideA = new SpanCursor(a, sharedChunks, 0).goto(from), sideB = new SpanCursor(b, sharedChunks, 0).goto(from);
-          for (;;) {
-              if (sideA.to != sideB.to ||
-                  !sameValues(sideA.active, sideB.active) ||
-                  sideA.point && (!sideB.point || !sideA.point.eq(sideB.point)))
-                  return false;
-              if (sideA.to > to)
-                  return true;
-              sideA.next();
-              sideB.next();
+      get rootView() {
+          for (let v = this;;) {
+              let parent = v.parent;
+              if (!parent)
+                  return v;
+              v = parent;
           }
       }
-      /**
-      Iterate over a group of range sets at the same time, notifying
-      the iterator about the ranges covering every given piece of
-      content. Returns the open count (see
-      [`SpanIterator.span`](https://codemirror.net/6/docs/ref/#state.SpanIterator.span)) at the end
-      of the iteration.
-      */
-      static spans(sets, from, to, iterator, 
-      /**
-      When given and greater than -1, only points of at least this
-      size are taken into account.
-      */
-      minPointSize = -1) {
-          let cursor = new SpanCursor(sets, null, minPointSize).goto(from), pos = from;
-          let openRanges = cursor.openStart;
-          for (;;) {
-              let curTo = Math.min(cursor.to, to);
-              if (cursor.point) {
-                  let active = cursor.activeForPoint(cursor.to);
-                  let openCount = cursor.pointFrom < from ? active.length + 1 : Math.min(active.length, openRanges);
-                  iterator.point(pos, curTo, cursor.point, active, openCount, cursor.pointRank);
-                  openRanges = Math.min(cursor.openEnd(curTo), active.length);
-              }
-              else if (curTo > pos) {
-                  iterator.span(pos, curTo, cursor.active, openRanges);
-                  openRanges = cursor.openEnd(curTo);
-              }
-              if (cursor.to > to)
-                  return openRanges + (cursor.point && cursor.to > to ? 1 : 0);
-              pos = cursor.to;
-              cursor.next();
+      replaceChildren(from, to, children = noChildren) {
+          this.markDirty();
+          for (let i = from; i < to; i++) {
+              let child = this.children[i];
+              if (child.parent == this)
+                  child.destroy();
           }
+          this.children.splice(from, to - from, ...children);
+          for (let i = 0; i < children.length; i++)
+              children[i].setParent(this);
       }
-      /**
-      Create a range set for the given range or array of ranges. By
-      default, this expects the ranges to be _sorted_ (by start
-      position and, if two start at the same position,
-      `value.startSide`). You can pass `true` as second argument to
-      cause the method to sort them.
-      */
-      static of(ranges, sort = false) {
-          let build = new RangeSetBuilder();
-          for (let range of ranges instanceof Range ? [ranges] : sort ? lazySort(ranges) : ranges)
-              build.add(range.from, range.to, range.value);
-          return build.finish();
+      ignoreMutation(_rec) { return false; }
+      ignoreEvent(_event) { return false; }
+      childCursor(pos = this.length) {
+          return new ChildCursor(this.children, pos, this.children.length);
+      }
+      childPos(pos, bias = 1) {
+          return this.childCursor().findPos(pos, bias);
+      }
+      toString() {
+          let name = this.constructor.name.replace("View", "");
+          return name + (this.children.length ? "(" + this.children.join() + ")" :
+              this.length ? "[" + (name == "Text" ? this.text : this.length) + "]" : "") +
+              (this.breakAfter ? "#" : "");
+      }
+      static get(node) { return node.cmView; }
+      get isEditable() { return true; }
+      get isWidget() { return false; }
+      get isHidden() { return false; }
+      merge(from, to, source, hasStart, openStart, openEnd) {
+          return false;
+      }
+      become(other) { return false; }
+      canReuseDOM(other) { return other.constructor == this.constructor; }
+      // When this is a zero-length view with a side, this should return a
+      // number <= 0 to indicate it is before its position, or a
+      // number > 0 when after its position.
+      getSide() { return 0; }
+      destroy() {
+          this.parent = null;
       }
   }
-  /**
-  The empty set of ranges.
-  */
-  RangeSet.empty = /*@__PURE__*/new RangeSet([], [], null, -1);
-  function lazySort(ranges) {
-      if (ranges.length > 1)
-          for (let prev = ranges[0], i = 1; i < ranges.length; i++) {
-              let cur = ranges[i];
-              if (cmpRange(prev, cur) > 0)
-                  return ranges.slice().sort(cmpRange);
-              prev = cur;
+  ContentView.prototype.breakAfter = 0;
+  // Remove a DOM node and return its next sibling.
+  function rm$1(dom) {
+      let next = dom.nextSibling;
+      dom.parentNode.removeChild(dom);
+      return next;
+  }
+  class ChildCursor {
+      constructor(children, pos, i) {
+          this.children = children;
+          this.pos = pos;
+          this.i = i;
+          this.off = 0;
+      }
+      findPos(pos, bias = 1) {
+          for (;;) {
+              if (pos > this.pos || pos == this.pos &&
+                  (bias > 0 || this.i == 0 || this.children[this.i - 1].breakAfter)) {
+                  this.off = pos - this.pos;
+                  return this;
+              }
+              let next = this.children[--this.i];
+              this.pos -= next.length + next.breakAfter;
           }
-      return ranges;
+      }
   }
-  RangeSet.empty.nextLayer = RangeSet.empty;
-  /**
-  A range set builder is a data structure that helps build up a
-  [range set](https://codemirror.net/6/docs/ref/#state.RangeSet) directly, without first allocating
-  an array of [`Range`](https://codemirror.net/6/docs/ref/#state.Range) objects.
-  */
-  class RangeSetBuilder {
-      /**
-      Create an empty builder.
-      */
-      constructor() {
-          this.chunks = [];
-          this.chunkPos = [];
-          this.chunkStart = -1;
-          this.last = null;
-          this.lastFrom = -1000000000 /* C.Far */;
-          this.lastTo = -1000000000 /* C.Far */;
-          this.from = [];
-          this.to = [];
-          this.value = [];
-          this.maxPoint = -1;
-          this.setMaxPoint = -1;
-          this.nextLayer = null;
+  function replaceRange(parent, fromI, fromOff, toI, toOff, insert, breakAtStart, openStart, openEnd) {
+      let { children } = parent;
+      let before = children.length ? children[fromI] : null;
+      let last = insert.length ? insert[insert.length - 1] : null;
+      let breakAtEnd = last ? last.breakAfter : breakAtStart;
+      // Change within a single child
+      if (fromI == toI && before && !breakAtStart && !breakAtEnd && insert.length < 2 &&
+          before.merge(fromOff, toOff, insert.length ? last : null, fromOff == 0, openStart, openEnd))
+          return;
+      if (toI < children.length) {
+          let after = children[toI];
+          // Make sure the end of the child after the update is preserved in `after`
+          if (after && toOff < after.length) {
+              // If we're splitting a child, separate part of it to avoid that
+              // being mangled when updating the child before the update.
+              if (fromI == toI) {
+                  after = after.split(toOff);
+                  toOff = 0;
+              }
+              // If the element after the replacement should be merged with
+              // the last replacing element, update `content`
+              if (!breakAtEnd && last && after.merge(0, toOff, last, true, 0, openEnd)) {
+                  insert[insert.length - 1] = after;
+              }
+              else {
+                  // Remove the start of the after element, if necessary, and
+                  // add it to `content`.
+                  if (toOff)
+                      after.merge(0, toOff, null, false, 0, openEnd);
+                  insert.push(after);
+              }
+          }
+          else if (after === null || after === void 0 ? void 0 : after.breakAfter) {
+              // The element at `toI` is entirely covered by this range.
+              // Preserve its line break, if any.
+              if (last)
+                  last.breakAfter = 1;
+              else
+                  breakAtStart = 1;
+          }
+          // Since we've handled the next element from the current elements
+          // now, make sure `toI` points after that.
+          toI++;
       }
-      finishChunk(newArrays) {
-          this.chunks.push(new Chunk(this.from, this.to, this.value, this.maxPoint));
-          this.chunkPos.push(this.chunkStart);
-          this.chunkStart = -1;
-          this.setMaxPoint = Math.max(this.setMaxPoint, this.maxPoint);
-          this.maxPoint = -1;
-          if (newArrays) {
-              this.from = [];
-              this.to = [];
-              this.value = [];
+      if (before) {
+          before.breakAfter = breakAtStart;
+          if (fromOff > 0) {
+              if (!breakAtStart && insert.length && before.merge(fromOff, before.length, insert[0], false, openStart, 0)) {
+                  before.breakAfter = insert.shift().breakAfter;
+              }
+              else if (fromOff < before.length || before.children.length && before.children[before.children.length - 1].length == 0) {
+                  before.merge(fromOff, before.length, null, false, openStart, 0);
+              }
+              fromI++;
           }
       }
-      /**
-      Add a range. Ranges should be added in sorted (by `from` and
-      `value.startSide`) order.
-      */
-      add(from, to, value) {
-          if (!this.addInner(from, to, value))
-              (this.nextLayer || (this.nextLayer = new RangeSetBuilder)).add(from, to, value);
+      // Try to merge widgets on the boundaries of the replacement
+      while (fromI < toI && insert.length) {
+          if (children[toI - 1].become(insert[insert.length - 1])) {
+              toI--;
+              insert.pop();
+              openEnd = insert.length ? 0 : openStart;
+          }
+          else if (children[fromI].become(insert[0])) {
+              fromI++;
+              insert.shift();
+              openStart = insert.length ? 0 : openEnd;
+          }
+          else {
+              break;
+          }
       }
-      /**
-      @internal
-      */
-      addInner(from, to, value) {
-          let diff = from - this.lastTo || value.startSide - this.last.endSide;
-          if (diff <= 0 && (from - this.lastFrom || value.startSide - this.last.startSide) < 0)
-              throw new Error("Ranges must be added sorted by `from` position and `startSide`");
-          if (diff < 0)
-              return false;
-          if (this.from.length == 250 /* C.ChunkSize */)
-              this.finishChunk(true);
-          if (this.chunkStart < 0)
-              this.chunkStart = from;
-          this.from.push(from - this.chunkStart);
-          this.to.push(to - this.chunkStart);
-          this.last = value;
-          this.lastFrom = from;
-          this.lastTo = to;
-          this.value.push(value);
-          if (value.point)
-              this.maxPoint = Math.max(this.maxPoint, to - from);
-          return true;
+      if (!insert.length && fromI && toI < children.length && !children[fromI - 1].breakAfter &&
+          children[toI].merge(0, 0, children[fromI - 1], false, openStart, openEnd))
+          fromI--;
+      if (fromI < toI || insert.length)
+          parent.replaceChildren(fromI, toI, insert);
+  }
+  function mergeChildrenInto(parent, from, to, insert, openStart, openEnd) {
+      let cur = parent.childCursor();
+      let { i: toI, off: toOff } = cur.findPos(to, 1);
+      let { i: fromI, off: fromOff } = cur.findPos(from, -1);
+      let dLen = from - to;
+      for (let view of insert)
+          dLen += view.length;
+      parent.length += dLen;
+      replaceRange(parent, fromI, fromOff, toI, toOff, insert, 0, openStart, openEnd);
+  }
+
+  let nav = typeof navigator != "undefined" ? navigator : { userAgent: "", vendor: "", platform: "" };
+  let doc = typeof document != "undefined" ? document : { documentElement: { style: {} } };
+  const ie_edge = /*@__PURE__*//Edge\/(\d+)/.exec(nav.userAgent);
+  const ie_upto10 = /*@__PURE__*//MSIE \d/.test(nav.userAgent);
+  const ie_11up = /*@__PURE__*//Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(nav.userAgent);
+  const ie = !!(ie_upto10 || ie_11up || ie_edge);
+  const gecko = !ie && /*@__PURE__*//gecko\/(\d+)/i.test(nav.userAgent);
+  const chrome = !ie && /*@__PURE__*//Chrome\/(\d+)/.exec(nav.userAgent);
+  const webkit = "webkitFontSmoothing" in doc.documentElement.style;
+  const safari = !ie && /*@__PURE__*//Apple Computer/.test(nav.vendor);
+  const ios = safari && (/*@__PURE__*//Mobile\/\w+/.test(nav.userAgent) || nav.maxTouchPoints > 2);
+  var browser = {
+      mac: ios || /*@__PURE__*//Mac/.test(nav.platform),
+      windows: /*@__PURE__*//Win/.test(nav.platform),
+      linux: /*@__PURE__*//Linux|X11/.test(nav.platform),
+      ie,
+      ie_version: ie_upto10 ? doc.documentMode || 6 : ie_11up ? +ie_11up[1] : ie_edge ? +ie_edge[1] : 0,
+      gecko,
+      gecko_version: gecko ? +(/*@__PURE__*//Firefox\/(\d+)/.exec(nav.userAgent) || [0, 0])[1] : 0,
+      chrome: !!chrome,
+      chrome_version: chrome ? +chrome[1] : 0,
+      ios,
+      android: /*@__PURE__*//Android\b/.test(nav.userAgent),
+      webkit,
+      safari,
+      webkit_version: webkit ? +(/*@__PURE__*//\bAppleWebKit\/(\d+)/.exec(navigator.userAgent) || [0, 0])[1] : 0,
+      tabSize: doc.documentElement.style.tabSize != null ? "tab-size" : "-moz-tab-size"
+  };
+
+  const MaxJoinLen = 256;
+  class TextView extends ContentView {
+      constructor(text) {
+          super();
+          this.text = text;
       }
-      /**
-      @internal
-      */
-      addChunk(from, chunk) {
-          if ((from - this.lastTo || chunk.value[0].startSide - this.last.endSide) < 0)
+      get length() { return this.text.length; }
+      createDOM(textDOM) {
+          this.setDOM(textDOM || document.createTextNode(this.text));
+      }
+      sync(view, track) {
+          if (!this.dom)
+              this.createDOM();
+          if (this.dom.nodeValue != this.text) {
+              if (track && track.node == this.dom)
+                  track.written = true;
+              this.dom.nodeValue = this.text;
+          }
+      }
+      reuseDOM(dom) {
+          if (dom.nodeType == 3)
+              this.createDOM(dom);
+      }
+      merge(from, to, source) {
+          if (source && (!(source instanceof TextView) || this.length - (to - from) + source.length > MaxJoinLen))
               return false;
-          if (this.from.length)
-              this.finishChunk(true);
-          this.setMaxPoint = Math.max(this.setMaxPoint, chunk.maxPoint);
-          this.chunks.push(chunk);
-          this.chunkPos.push(from);
-          let last = chunk.value.length - 1;
-          this.last = chunk.value[last];
-          this.lastFrom = chunk.from[last] + from;
-          this.lastTo = chunk.to[last] + from;
+          this.text = this.text.slice(0, from) + (source ? source.text : "") + this.text.slice(to);
+          this.markDirty();
           return true;
       }
-      /**
-      Finish the range set. Returns the new set. The builder can't be
-      used anymore after this has been called.
-      */
-      finish() { return this.finishInner(RangeSet.empty); }
-      /**
-      @internal
-      */
-      finishInner(next) {
-          if (this.from.length)
-              this.finishChunk(false);
-          if (this.chunks.length == 0)
-              return next;
-          let result = RangeSet.create(this.chunkPos, this.chunks, this.nextLayer ? this.nextLayer.finishInner(next) : next, this.setMaxPoint);
-          this.from = null; // Make sure further `add` calls produce errors
+      split(from) {
+          let result = new TextView(this.text.slice(from));
+          this.text = this.text.slice(0, from);
+          this.markDirty();
           return result;
       }
+      localPosFromDOM(node, offset) {
+          return node == this.dom ? offset : offset ? this.text.length : 0;
+      }
+      domAtPos(pos) { return new DOMPos(this.dom, pos); }
+      domBoundsAround(_from, _to, offset) {
+          return { from: offset, to: offset + this.length, startDOM: this.dom, endDOM: this.dom.nextSibling };
+      }
+      coordsAt(pos, side) {
+          return textCoords(this.dom, pos, side);
+      }
   }
-  function findSharedChunks(a, b, textDiff) {
-      let inA = new Map();
-      for (let set of a)
-          for (let i = 0; i < set.chunk.length; i++)
-              if (set.chunk[i].maxPoint <= 0)
-                  inA.set(set.chunk[i], set.chunkPos[i]);
-      let shared = new Set();
-      for (let set of b)
-          for (let i = 0; i < set.chunk.length; i++) {
-              let known = inA.get(set.chunk[i]);
-              if (known != null && (textDiff ? textDiff.mapPos(known) : known) == set.chunkPos[i] &&
-                  !(textDiff === null || textDiff === void 0 ? void 0 : textDiff.touchesRange(known, known + set.chunk[i].length)))
-                  shared.add(set.chunk[i]);
-          }
-      return shared;
-  }
-  class LayerCursor {
-      constructor(layer, skip, minPoint, rank = 0) {
-          this.layer = layer;
-          this.skip = skip;
-          this.minPoint = minPoint;
-          this.rank = rank;
+  class MarkView extends ContentView {
+      constructor(mark, children = [], length = 0) {
+          super();
+          this.mark = mark;
+          this.children = children;
+          this.length = length;
+          for (let ch of children)
+              ch.setParent(this);
       }
-      get startSide() { return this.value ? this.value.startSide : 0; }
-      get endSide() { return this.value ? this.value.endSide : 0; }
-      goto(pos, side = -1000000000 /* C.Far */) {
-          this.chunkIndex = this.rangeIndex = 0;
-          this.gotoInner(pos, side, false);
-          return this;
+      setAttrs(dom) {
+          clearAttributes(dom);
+          if (this.mark.class)
+              dom.className = this.mark.class;
+          if (this.mark.attrs)
+              for (let name in this.mark.attrs)
+                  dom.setAttribute(name, this.mark.attrs[name]);
+          return dom;
       }
-      gotoInner(pos, side, forward) {
-          while (this.chunkIndex < this.layer.chunk.length) {
-              let next = this.layer.chunk[this.chunkIndex];
-              if (!(this.skip && this.skip.has(next) ||
-                  this.layer.chunkEnd(this.chunkIndex) < pos ||
-                  next.maxPoint < this.minPoint))
-                  break;
-              this.chunkIndex++;
-              forward = false;
-          }
-          if (this.chunkIndex < this.layer.chunk.length) {
-              let rangeIndex = this.layer.chunk[this.chunkIndex].findIndex(pos - this.layer.chunkPos[this.chunkIndex], side, true);
-              if (!forward || this.rangeIndex < rangeIndex)
-                  this.setRangeIndex(rangeIndex);
+      reuseDOM(node) {
+          if (node.nodeName == this.mark.tagName.toUpperCase()) {
+              this.setDOM(node);
+              this.dirty |= 4 /* Attrs */ | 2 /* Node */;
           }
-          this.next();
       }
-      forward(pos, side) {
-          if ((this.to - pos || this.endSide - side) < 0)
-              this.gotoInner(pos, side, true);
+      sync(view, track) {
+          if (!this.dom)
+              this.setDOM(this.setAttrs(document.createElement(this.mark.tagName)));
+          else if (this.dirty & 4 /* Attrs */)
+              this.setAttrs(this.dom);
+          super.sync(view, track);
       }
-      next() {
-          for (;;) {
-              if (this.chunkIndex == this.layer.chunk.length) {
-                  this.from = this.to = 1000000000 /* C.Far */;
-                  this.value = null;
-                  break;
-              }
-              else {
-                  let chunkPos = this.layer.chunkPos[this.chunkIndex], chunk = this.layer.chunk[this.chunkIndex];
-                  let from = chunkPos + chunk.from[this.rangeIndex];
-                  this.from = from;
-                  this.to = chunkPos + chunk.to[this.rangeIndex];
-                  this.value = chunk.value[this.rangeIndex];
-                  this.setRangeIndex(this.rangeIndex + 1);
-                  if (this.minPoint < 0 || this.value.point && this.to - this.from >= this.minPoint)
-                      break;
-              }
-          }
+      merge(from, to, source, _hasStart, openStart, openEnd) {
+          if (source && (!(source instanceof MarkView && source.mark.eq(this.mark)) ||
+              (from && openStart <= 0) || (to < this.length && openEnd <= 0)))
+              return false;
+          mergeChildrenInto(this, from, to, source ? source.children : [], openStart - 1, openEnd - 1);
+          this.markDirty();
+          return true;
       }
-      setRangeIndex(index) {
-          if (index == this.layer.chunk[this.chunkIndex].value.length) {
-              this.chunkIndex++;
-              if (this.skip) {
-                  while (this.chunkIndex < this.layer.chunk.length && this.skip.has(this.layer.chunk[this.chunkIndex]))
-                      this.chunkIndex++;
-              }
-              this.rangeIndex = 0;
+      split(from) {
+          let result = [], off = 0, detachFrom = -1, i = 0;
+          for (let elt of this.children) {
+              let end = off + elt.length;
+              if (end > from)
+                  result.push(off < from ? elt.split(from - off) : elt);
+              if (detachFrom < 0 && off >= from)
+                  detachFrom = i;
+              off = end;
+              i++;
           }
-          else {
-              this.rangeIndex = index;
+          let length = this.length - from;
+          this.length = from;
+          if (detachFrom > -1) {
+              this.children.length = detachFrom;
+              this.markDirty();
           }
+          return new MarkView(this.mark, result, length);
       }
-      nextChunk() {
-          this.chunkIndex++;
-          this.rangeIndex = 0;
-          this.next();
+      domAtPos(pos) {
+          return inlineDOMAtPos(this, pos);
       }
-      compare(other) {
-          return this.from - other.from || this.startSide - other.startSide || this.rank - other.rank ||
-              this.to - other.to || this.endSide - other.endSide;
+      coordsAt(pos, side) {
+          return coordsInChildren(this, pos, side);
       }
   }
-  class HeapCursor {
-      constructor(heap) {
-          this.heap = heap;
-      }
-      static from(sets, skip = null, minPoint = -1) {
-          let heap = [];
-          for (let i = 0; i < sets.length; i++) {
-              for (let cur = sets[i]; !cur.isEmpty; cur = cur.nextLayer) {
-                  if (cur.maxPoint >= minPoint)
-                      heap.push(new LayerCursor(cur, skip, minPoint, i));
+  function textCoords(text, pos, side) {
+      let length = text.nodeValue.length;
+      if (pos > length)
+          pos = length;
+      let from = pos, to = pos, flatten = 0;
+      if (pos == 0 && side < 0 || pos == length && side >= 0) {
+          if (!(browser.chrome || browser.gecko)) { // These browsers reliably return valid rectangles for empty ranges
+              if (pos) {
+                  from--;
+                  flatten = 1;
+              } // FIXME this is wrong in RTL text
+              else if (to < length) {
+                  to++;
+                  flatten = -1;
               }
           }
-          return heap.length == 1 ? heap[0] : new HeapCursor(heap);
       }
-      get startSide() { return this.value ? this.value.startSide : 0; }
-      goto(pos, side = -1000000000 /* C.Far */) {
-          for (let cur of this.heap)
-              cur.goto(pos, side);
-          for (let i = this.heap.length >> 1; i >= 0; i--)
-              heapBubble(this.heap, i);
-          this.next();
-          return this;
+      else {
+          if (side < 0)
+              from--;
+          else if (to < length)
+              to++;
       }
-      forward(pos, side) {
-          for (let cur of this.heap)
-              cur.forward(pos, side);
-          for (let i = this.heap.length >> 1; i >= 0; i--)
-              heapBubble(this.heap, i);
-          if ((this.to - pos || this.value.endSide - side) < 0)
-              this.next();
+      let rects = textRange(text, from, to).getClientRects();
+      if (!rects.length)
+          return null;
+      let rect = rects[(flatten ? flatten < 0 : side >= 0) ? 0 : rects.length - 1];
+      if (browser.safari && !flatten && rect.width == 0)
+          rect = Array.prototype.find.call(rects, r => r.width) || rect;
+      return flatten ? flattenRect(rect, flatten < 0) : rect || null;
+  }
+  // Also used for collapsed ranges that don't have a placeholder widget!
+  class WidgetView extends ContentView {
+      constructor(widget, length, side) {
+          super();
+          this.widget = widget;
+          this.length = length;
+          this.side = side;
+          this.prevWidget = null;
       }
-      next() {
-          if (this.heap.length == 0) {
-              this.from = this.to = 1000000000 /* C.Far */;
-              this.value = null;
-              this.rank = -1;
-          }
-          else {
-              let top = this.heap[0];
-              this.from = top.from;
-              this.to = top.to;
-              this.value = top.value;
-              this.rank = top.rank;
-              if (top.value)
-                  top.next();
-              heapBubble(this.heap, 0);
-          }
+      static create(widget, length, side) {
+          return new (widget.customView || WidgetView)(widget, length, side);
       }
-  }
-  function heapBubble(heap, index) {
-      for (let cur = heap[index];;) {
-          let childIndex = (index << 1) + 1;
-          if (childIndex >= heap.length)
-              break;
-          let child = heap[childIndex];
-          if (childIndex + 1 < heap.length && child.compare(heap[childIndex + 1]) >= 0) {
-              child = heap[childIndex + 1];
-              childIndex++;
+      split(from) {
+          let result = WidgetView.create(this.widget, this.length - from, this.side);
+          this.length -= from;
+          return result;
+      }
+      sync(view) {
+          if (!this.dom || !this.widget.updateDOM(this.dom, view)) {
+              if (this.dom && this.prevWidget)
+                  this.prevWidget.destroy(this.dom);
+              this.prevWidget = null;
+              this.setDOM(this.widget.toDOM(view));
+              this.dom.contentEditable = "false";
           }
-          if (cur.compare(child) < 0)
-              break;
-          heap[childIndex] = cur;
-          heap[index] = child;
-          index = childIndex;
       }
-  }
-  class SpanCursor {
-      constructor(sets, skip, minPoint) {
-          this.minPoint = minPoint;
-          this.active = [];
-          this.activeTo = [];
-          this.activeRank = [];
-          this.minActive = -1;
-          // A currently active point range, if any
-          this.point = null;
-          this.pointFrom = 0;
-          this.pointRank = 0;
-          this.to = -1000000000 /* C.Far */;
-          this.endSide = 0;
-          // The amount of open active ranges at the start of the iterator.
-          // Not including points.
-          this.openStart = -1;
-          this.cursor = HeapCursor.from(sets, skip, minPoint);
-      }
-      goto(pos, side = -1000000000 /* C.Far */) {
-          this.cursor.goto(pos, side);
-          this.active.length = this.activeTo.length = this.activeRank.length = 0;
-          this.minActive = -1;
-          this.to = pos;
-          this.endSide = side;
-          this.openStart = -1;
-          this.next();
-          return this;
+      getSide() { return this.side; }
+      merge(from, to, source, hasStart, openStart, openEnd) {
+          if (source && (!(source instanceof WidgetView) || !this.widget.compare(source.widget) ||
+              from > 0 && openStart <= 0 || to < this.length && openEnd <= 0))
+              return false;
+          this.length = from + (source ? source.length : 0) + (this.length - to);
+          return true;
       }
-      forward(pos, side) {
-          while (this.minActive > -1 && (this.activeTo[this.minActive] - pos || this.active[this.minActive].endSide - side) < 0)
-              this.removeActive(this.minActive);
-          this.cursor.forward(pos, side);
+      become(other) {
+          if (other instanceof WidgetView && other.side == this.side &&
+              this.widget.constructor == other.widget.constructor) {
+              if (!this.widget.compare(other.widget))
+                  this.markDirty(true);
+              if (this.dom && !this.prevWidget)
+                  this.prevWidget = this.widget;
+              this.widget = other.widget;
+              this.length = other.length;
+              return true;
+          }
+          return false;
       }
-      removeActive(index) {
-          remove(this.active, index);
-          remove(this.activeTo, index);
-          remove(this.activeRank, index);
-          this.minActive = findMinIndex(this.active, this.activeTo);
+      ignoreMutation() { return true; }
+      ignoreEvent(event) { return this.widget.ignoreEvent(event); }
+      get overrideDOMText() {
+          if (this.length == 0)
+              return Text$1.empty;
+          let top = this;
+          while (top.parent)
+              top = top.parent;
+          let { view } = top, text = view && view.state.doc, start = this.posAtStart;
+          return text ? text.slice(start, start + this.length) : Text$1.empty;
       }
-      addActive(trackOpen) {
-          let i = 0, { value, to, rank } = this.cursor;
-          while (i < this.activeRank.length && this.activeRank[i] <= rank)
-              i++;
-          insert(this.active, i, value);
-          insert(this.activeTo, i, to);
-          insert(this.activeRank, i, rank);
-          if (trackOpen)
-              insert(trackOpen, i, this.cursor.from);
-          this.minActive = findMinIndex(this.active, this.activeTo);
+      domAtPos(pos) {
+          return (this.length ? pos == 0 : this.side > 0)
+              ? DOMPos.before(this.dom)
+              : DOMPos.after(this.dom, pos == this.length);
       }
-      // After calling this, if `this.point` != null, the next range is a
-      // point. Otherwise, it's a regular range, covered by `this.active`.
-      next() {
-          let from = this.to, wasPoint = this.point;
-          this.point = null;
-          let trackOpen = this.openStart < 0 ? [] : null;
-          for (;;) {
-              let a = this.minActive;
-              if (a > -1 && (this.activeTo[a] - this.cursor.from || this.active[a].endSide - this.cursor.startSide) < 0) {
-                  if (this.activeTo[a] > from) {
-                      this.to = this.activeTo[a];
-                      this.endSide = this.active[a].endSide;
-                      break;
-                  }
-                  this.removeActive(a);
-                  if (trackOpen)
-                      remove(trackOpen, a);
-              }
-              else if (!this.cursor.value) {
-                  this.to = this.endSide = 1000000000 /* C.Far */;
-                  break;
-              }
-              else if (this.cursor.from > from) {
-                  this.to = this.cursor.from;
-                  this.endSide = this.cursor.startSide;
+      domBoundsAround() { return null; }
+      coordsAt(pos, side) {
+          let custom = this.widget.coordsAt(this.dom, pos, side);
+          if (custom)
+              return custom;
+          let rects = this.dom.getClientRects(), rect = null;
+          if (!rects.length)
+              return null;
+          let fromBack = this.side ? this.side < 0 : pos > 0;
+          for (let i = fromBack ? rects.length - 1 : 0;; i += (fromBack ? -1 : 1)) {
+              rect = rects[i];
+              if (pos > 0 ? i == 0 : i == rects.length - 1 || rect.top < rect.bottom)
                   break;
+          }
+          return flattenRect(rect, !fromBack);
+      }
+      get isEditable() { return false; }
+      get isWidget() { return true; }
+      get isHidden() { return this.widget.isHidden; }
+      destroy() {
+          super.destroy();
+          if (this.dom)
+              this.widget.destroy(this.dom);
+      }
+  }
+  class CompositionView extends WidgetView {
+      domAtPos(pos) {
+          let { topView, text } = this.widget;
+          if (!topView)
+              return new DOMPos(text, Math.min(pos, text.nodeValue.length));
+          return scanCompositionTree(pos, 0, topView, text, this.length - topView.length, (v, p) => v.domAtPos(p), (text, p) => new DOMPos(text, Math.min(p, text.nodeValue.length)));
+      }
+      sync() { this.setDOM(this.widget.toDOM()); }
+      localPosFromDOM(node, offset) {
+          let { topView, text } = this.widget;
+          if (!topView)
+              return Math.min(offset, this.length);
+          return posFromDOMInCompositionTree(node, offset, topView, text, this.length - topView.length);
+      }
+      ignoreMutation() { return false; }
+      get overrideDOMText() { return null; }
+      coordsAt(pos, side) {
+          let { topView, text } = this.widget;
+          if (!topView)
+              return textCoords(text, pos, side);
+          return scanCompositionTree(pos, side, topView, text, this.length - topView.length, (v, pos, side) => v.coordsAt(pos, side), (text, pos, side) => textCoords(text, pos, side));
+      }
+      destroy() {
+          var _a;
+          super.destroy();
+          (_a = this.widget.topView) === null || _a === void 0 ? void 0 : _a.destroy();
+      }
+      get isEditable() { return true; }
+      canReuseDOM() { return true; }
+  }
+  // Uses the old structure of a chunk of content view frozen for
+  // composition to try and find a reasonable DOM location for the given
+  // offset.
+  function scanCompositionTree(pos, side, view, text, dLen, enterView, fromText) {
+      if (view instanceof MarkView) {
+          for (let child = view.dom.firstChild; child; child = child.nextSibling) {
+              let desc = ContentView.get(child);
+              if (!desc) {
+                  let inner = scanCompositionNode(pos, side, child, fromText);
+                  if (typeof inner != "number")
+                      return inner;
+                  pos = inner;
               }
               else {
-                  let nextVal = this.cursor.value;
-                  if (!nextVal.point) { // Opening a range
-                      this.addActive(trackOpen);
-                      this.cursor.next();
-                  }
-                  else if (wasPoint && this.cursor.to == this.to && this.cursor.from < this.cursor.to) {
-                      // Ignore any non-empty points that end precisely at the end of the prev point
-                      this.cursor.next();
-                  }
-                  else { // New point
-                      this.point = nextVal;
-                      this.pointFrom = this.cursor.from;
-                      this.pointRank = this.cursor.rank;
-                      this.to = this.cursor.to;
-                      this.endSide = nextVal.endSide;
-                      this.cursor.next();
-                      this.forward(this.to, this.endSide);
-                      break;
-                  }
+                  let hasComp = contains(child, text);
+                  let len = desc.length + (hasComp ? dLen : 0);
+                  if (pos < len || pos == len && desc.getSide() <= 0)
+                      return hasComp ? scanCompositionTree(pos, side, desc, text, dLen, enterView, fromText) : enterView(desc, pos, side);
+                  pos -= len;
               }
           }
-          if (trackOpen) {
-              this.openStart = 0;
-              for (let i = trackOpen.length - 1; i >= 0 && trackOpen[i] < from; i--)
-                  this.openStart++;
-          }
+          return enterView(view, view.length, -1);
       }
-      activeForPoint(to) {
-          if (!this.active.length)
-              return this.active;
-          let active = [];
-          for (let i = this.active.length - 1; i >= 0; i--) {
-              if (this.activeRank[i] < this.pointRank)
-                  break;
-              if (this.activeTo[i] > to || this.activeTo[i] == to && this.active[i].endSide >= this.point.endSide)
-                  active.push(this.active[i]);
-          }
-          return active.reverse();
+      else if (view.dom == text) {
+          return fromText(text, pos, side);
       }
-      openEnd(to) {
-          let open = 0;
-          for (let i = this.activeTo.length - 1; i >= 0 && this.activeTo[i] > to; i--)
-              open++;
-          return open;
+      else {
+          return enterView(view, pos, side);
       }
   }
-  function compare(a, startA, b, startB, length, comparator) {
-      a.goto(startA);
-      b.goto(startB);
-      let endB = startB + length;
-      let pos = startB, dPos = startB - startA;
-      for (;;) {
-          let diff = (a.to + dPos) - b.to || a.endSide - b.endSide;
-          let end = diff < 0 ? a.to + dPos : b.to, clipEnd = Math.min(end, endB);
-          if (a.point || b.point) {
-              if (!(a.point && b.point && (a.point == b.point || a.point.eq(b.point)) &&
-                  sameValues(a.activeForPoint(a.to + dPos), b.activeForPoint(b.to))))
-                  comparator.comparePoint(pos, clipEnd, a.point, b.point);
-          }
-          else {
-              if (clipEnd > pos && !sameValues(a.active, b.active))
-                  comparator.compareRange(pos, clipEnd, a.active, b.active);
+  function scanCompositionNode(pos, side, node, fromText) {
+      if (node.nodeType == 3) {
+          let len = node.nodeValue.length;
+          if (pos <= len)
+              return fromText(node, pos, side);
+          pos -= len;
+      }
+      else if (node.nodeType == 1 && node.contentEditable != "false") {
+          for (let child = node.firstChild; child; child = child.nextSibling) {
+              let inner = scanCompositionNode(pos, side, child, fromText);
+              if (typeof inner != "number")
+                  return inner;
+              pos = inner;
           }
-          if (end > endB)
-              break;
-          pos = end;
-          if (diff <= 0)
-              a.next();
-          if (diff >= 0)
-              b.next();
       }
+      return pos;
   }
-  function sameValues(a, b) {
-      if (a.length != b.length)
-          return false;
-      for (let i = 0; i < a.length; i++)
-          if (a[i] != b[i] && !a[i].eq(b[i]))
-              return false;
-      return true;
-  }
-  function remove(array, index) {
-      for (let i = index, e = array.length - 1; i < e; i++)
-          array[i] = array[i + 1];
-      array.pop();
+  function posFromDOMInCompositionTree(node, offset, view, text, dLen) {
+      if (view instanceof MarkView) {
+          let pos = 0;
+          for (let child = view.dom.firstChild; child; child = child.nextSibling) {
+              let childView = ContentView.get(child);
+              if (childView) {
+                  let hasComp = contains(child, text);
+                  if (contains(child, node))
+                      return pos + (hasComp ? posFromDOMInCompositionTree(node, offset, childView, text, dLen)
+                          : childView.localPosFromDOM(node, offset));
+                  pos += childView.length + (hasComp ? dLen : 0);
+              }
+              else {
+                  let inner = posFromDOMInOpaqueNode(node, offset, child);
+                  if (inner.result != null)
+                      return pos + inner.result;
+                  pos += inner.size;
+              }
+          }
+      }
+      else if (view.dom == text) {
+          return Math.min(offset, text.nodeValue.length);
+      }
+      return view.localPosFromDOM(node, offset);
   }
-  function insert(array, index, value) {
-      for (let i = array.length - 1; i >= index; i--)
-          array[i + 1] = array[i];
-      array[index] = value;
+  function posFromDOMInOpaqueNode(node, offset, target) {
+      if (target.nodeType == 3) {
+          return node == target ? { result: offset } : { size: target.nodeValue.length };
+      }
+      else if (target.nodeType == 1 && target.contentEditable != "false") {
+          let pos = 0;
+          for (let child = target.firstChild, i = 0;; child = child.nextSibling, i++) {
+              if (node == target && i == offset)
+                  return { result: pos };
+              if (!child)
+                  return { size: pos };
+              let inner = posFromDOMInOpaqueNode(node, offset, child);
+              if (inner.result != null)
+                  return { result: offset + inner.result };
+              pos += inner.size;
+          }
+      }
+      else {
+          return target.contains(node) ? { result: 0 } : { size: 0 };
+      }
   }
-  function findMinIndex(value, array) {
-      let found = -1, foundPos = 1000000000 /* C.Far */;
-      for (let i = 0; i < array.length; i++)
-          if ((array[i] - foundPos || value[i].endSide - value[found].endSide) < 0) {
-              found = i;
-              foundPos = array[i];
+  // These are drawn around uneditable widgets to avoid a number of
+  // browser bugs that show up when the cursor is directly next to
+  // uneditable inline content.
+  class WidgetBufferView extends ContentView {
+      constructor(side) {
+          super();
+          this.side = side;
+      }
+      get length() { return 0; }
+      merge() { return false; }
+      become(other) {
+          return other instanceof WidgetBufferView && other.side == this.side;
+      }
+      split() { return new WidgetBufferView(this.side); }
+      sync() {
+          if (!this.dom) {
+              let dom = document.createElement("img");
+              dom.className = "cm-widgetBuffer";
+              dom.setAttribute("aria-hidden", "true");
+              this.setDOM(dom);
           }
-      return found;
+      }
+      getSide() { return this.side; }
+      domAtPos(pos) { return this.side > 0 ? DOMPos.before(this.dom) : DOMPos.after(this.dom); }
+      localPosFromDOM() { return 0; }
+      domBoundsAround() { return null; }
+      coordsAt(pos) {
+          return this.dom.getBoundingClientRect();
+      }
+      get overrideDOMText() {
+          return Text$1.empty;
+      }
+      get isHidden() { return true; }
   }
-  /**
-  Find the offset that corresponds to the given column position in a
-  string, taking extending characters and tab size into account. By
-  default, the string length is returned when it is too short to
-  reach the column. Pass `strict` true to make it return -1 in that
-  situation.
-  */
-  function findColumn(string, col, tabSize, strict) {
-      for (let i = 0, n = 0;;) {
-          if (n >= col)
-              return i;
-          if (i == string.length)
+  TextView.prototype.children = WidgetView.prototype.children = WidgetBufferView.prototype.children = noChildren;
+  function inlineDOMAtPos(parent, pos) {
+      let dom = parent.dom, { children } = parent, i = 0;
+      for (let off = 0; i < children.length; i++) {
+          let child = children[i], end = off + child.length;
+          if (end == off && child.getSide() <= 0)
+              continue;
+          if (pos > off && pos < end && child.dom.parentNode == dom)
+              return child.domAtPos(pos - off);
+          if (pos <= off)
               break;
-          n += string.charCodeAt(i) == 9 ? tabSize - (n % tabSize) : 1;
-          i = findClusterBreak(string, i);
+          off = end;
       }
-      return strict === true ? -1 : string.length;
+      for (let j = i; j > 0; j--) {
+          let prev = children[j - 1];
+          if (prev.dom.parentNode == dom)
+              return prev.domAtPos(prev.length);
+      }
+      for (let j = i; j < children.length; j++) {
+          let next = children[j];
+          if (next.dom.parentNode == dom)
+              return next.domAtPos(0);
+      }
+      return new DOMPos(dom, 0);
   }
-
-  const C$2 = "\u037c";
-  const COUNT = typeof Symbol == "undefined" ? "__" + C$2 : Symbol.for(C$2);
-  const SET = typeof Symbol == "undefined" ? "__styleSet" + Math.floor(Math.random() * 1e8) : Symbol("styleSet");
-  const top = typeof globalThis != "undefined" ? globalThis : typeof window != "undefined" ? window : {};
-
-  // :: - Style modules encapsulate a set of CSS rules defined from
-  // JavaScript. Their definitions are only available in a given DOM
-  // root after it has been _mounted_ there with `StyleModule.mount`.
-  //
-  // Style modules should be created once and stored somewhere, as
-  // opposed to re-creating them every time you need them. The amount of
-  // CSS rules generated for a given DOM root is bounded by the amount
-  // of style modules that were used. So to avoid leaking rules, don't
-  // create these dynamically, but treat them as one-time allocations.
-  class StyleModule {
-    // :: (Object<Style>, ?{finish: ?(string) → string})
-    // Create a style module from the given spec.
-    //
-    // When `finish` is given, it is called on regular (non-`@`)
-    // selectors (after `&` expansion) to compute the final selector.
-    constructor(spec, options) {
-      this.rules = [];
-      let {finish} = options || {};
-
-      function splitSelector(selector) {
-        return /^@/.test(selector) ? [selector] : selector.split(/,\s*/)
+  // Assumes `view`, if a mark view, has precisely 1 child.
+  function joinInlineInto(parent, view, open) {
+      let last, { children } = parent;
+      if (open > 0 && view instanceof MarkView && children.length &&
+          (last = children[children.length - 1]) instanceof MarkView && last.mark.eq(view.mark)) {
+          joinInlineInto(last, view.children[0], open - 1);
       }
-
-      function render(selectors, spec, target, isKeyframes) {
-        let local = [], isAt = /^@(\w+)\b/.exec(selectors[0]), keyframes = isAt && isAt[1] == "keyframes";
-        if (isAt && spec == null) return target.push(selectors[0] + ";")
-        for (let prop in spec) {
-          let value = spec[prop];
-          if (/&/.test(prop)) {
-            render(prop.split(/,\s*/).map(part => selectors.map(sel => part.replace(/&/, sel))).reduce((a, b) => a.concat(b)),
-                   value, target);
-          } else if (value && typeof value == "object") {
-            if (!isAt) throw new RangeError("The value of a property (" + prop + ") should be a primitive value.")
-            render(splitSelector(prop), value, local, keyframes);
-          } else if (value != null) {
-            local.push(prop.replace(/_.*/, "").replace(/[A-Z]/g, l => "-" + l.toLowerCase()) + ": " + value + ";");
-          }
-        }
-        if (local.length || keyframes) {
-          target.push((finish && !isAt && !isKeyframes ? selectors.map(finish) : selectors).join(", ") +
-                      " {" + local.join(" ") + "}");
-        }
+      else {
+          children.push(view);
+          view.setParent(parent);
       }
-
-      for (let prop in spec) render(splitSelector(prop), spec[prop], this.rules);
-    }
-
-    // :: () → string
-    // Returns a string containing the module's CSS rules.
-    getRules() { return this.rules.join("\n") }
-
-    // :: () → string
-    // Generate a new unique CSS class name.
-    static newName() {
-      let id = top[COUNT] || 1;
-      top[COUNT] = id + 1;
-      return C$2 + id.toString(36)
-    }
-
-    // :: (union<Document, ShadowRoot>, union<[StyleModule], StyleModule>)
-    //
-    // Mount the given set of modules in the given DOM root, which ensures
-    // that the CSS rules defined by the module are available in that
-    // context.
-    //
-    // Rules are only added to the document once per root.
-    //
-    // Rule order will follow the order of the modules, so that rules from
-    // modules later in the array take precedence of those from earlier
-    // modules. If you call this function multiple times for the same root
-    // in a way that changes the order of already mounted modules, the old
-    // order will be changed.
-    static mount(root, modules) {
-      (root[SET] || new StyleSet(root)).mount(Array.isArray(modules) ? modules : [modules]);
-    }
+      parent.length += view.length;
   }
-
-  let adoptedSet = null;
-
-  class StyleSet {
-    constructor(root) {
-      if (!root.head && root.adoptedStyleSheets && typeof CSSStyleSheet != "undefined") {
-        if (adoptedSet) {
-          root.adoptedStyleSheets = [adoptedSet.sheet].concat(root.adoptedStyleSheets);
-          return root[SET] = adoptedSet
-        }
-        this.sheet = new CSSStyleSheet;
-        root.adoptedStyleSheets = [this.sheet].concat(root.adoptedStyleSheets);
-        adoptedSet = this;
-      } else {
-        this.styleTag = (root.ownerDocument || root).createElement("style");
-        let target = root.head || root;
-        target.insertBefore(this.styleTag, target.firstChild);
+  function coordsInChildren(view, pos, side) {
+      let before = null, beforePos = -1, after = null, afterPos = -1;
+      function scan(view, pos) {
+          for (let i = 0, off = 0; i < view.children.length && off <= pos; i++) {
+              let child = view.children[i], end = off + child.length;
+              if (end >= pos) {
+                  if (child.children.length) {
+                      scan(child, pos - off);
+                  }
+                  else if ((!after || after.isHidden && side > 0) &&
+                      (end > pos || off == end && child.getSide() > 0)) {
+                      after = child;
+                      afterPos = pos - off;
+                  }
+                  else if (off < pos || (off == end && child.getSide() < 0) && !child.isHidden) {
+                      before = child;
+                      beforePos = pos - off;
+                  }
+              }
+              off = end;
+          }
       }
-      this.modules = [];
-      root[SET] = this;
-    }
+      scan(view, pos);
+      let target = (side < 0 ? before : after) || before || after;
+      if (target)
+          return target.coordsAt(Math.max(0, target == before ? beforePos : afterPos), side);
+      return fallbackRect(view);
+  }
+  function fallbackRect(view) {
+      let last = view.dom.lastChild;
+      if (!last)
+          return view.dom.getBoundingClientRect();
+      let rects = clientRectsFor(last);
+      return rects[rects.length - 1] || null;
+  }
 
-    mount(modules) {
-      let sheet = this.sheet;
-      let pos = 0 /* Current rule offset */, j = 0; /* Index into this.modules */
-      for (let i = 0; i < modules.length; i++) {
-        let mod = modules[i], index = this.modules.indexOf(mod);
-        if (index < j && index > -1) { // Ordering conflict
-          this.modules.splice(index, 1);
-          j--;
-          index = -1;
-        }
-        if (index == -1) {
-          this.modules.splice(j++, 0, mod);
-          if (sheet) for (let k = 0; k < mod.rules.length; k++)
-            sheet.insertRule(mod.rules[k], pos++);
-        } else {
-          while (j < index) pos += this.modules[j++].rules.length;
-          pos += mod.rules.length;
-          j++;
-        }
+  function combineAttrs(source, target) {
+      for (let name in source) {
+          if (name == "class" && target.class)
+              target.class += " " + source.class;
+          else if (name == "style" && target.style)
+              target.style += ";" + source.style;
+          else
+              target[name] = source[name];
       }
-
-      if (!sheet) {
-        let text = "";
-        for (let i = 0; i < this.modules.length; i++)
-          text += this.modules[i].getRules() + "\n";
-        this.styleTag.textContent = text;
+      return target;
+  }
+  function attrsEq(a, b) {
+      if (a == b)
+          return true;
+      if (!a || !b)
+          return false;
+      let keysA = Object.keys(a), keysB = Object.keys(b);
+      if (keysA.length != keysB.length)
+          return false;
+      for (let key of keysA) {
+          if (keysB.indexOf(key) == -1 || a[key] !== b[key])
+              return false;
       }
-    }
+      return true;
   }
-
-  // Style::Object<union<Style,string>>
-  //
-  // A style is an object that, in the simple case, maps CSS property
-  // names to strings holding their values, as in `{color: "red",
-  // fontWeight: "bold"}`. The property names can be given in
-  // camel-case—the library will insert a dash before capital letters
-  // when converting them to CSS.
-  //
-  // If you include an underscore in a property name, it and everything
-  // after it will be removed from the output, which can be useful when
-  // providing a property multiple times, for browser compatibility
-  // reasons.
-  //
-  // A property in a style object can also be a sub-selector, which
-  // extends the current context to add a pseudo-selector or a child
-  // selector. Such a property should contain a `&` character, which
-  // will be replaced by the current selector. For example `{"&:before":
-  // {content: '"hi"'}}`. Sub-selectors and regular properties can
-  // freely be mixed in a given object. Any property containing a `&` is
-  // assumed to be a sub-selector.
-  //
-  // Finally, a property can specify an @-block to be wrapped around the
-  // styles defined inside the object that's the property's value. For
-  // example to create a media query you can do `{"@media screen and
-  // (min-width: 400px)": {...}}`.
-
-  var base = {
-    8: "Backspace",
-    9: "Tab",
-    10: "Enter",
-    12: "NumLock",
-    13: "Enter",
-    16: "Shift",
-    17: "Control",
-    18: "Alt",
-    20: "CapsLock",
-    27: "Escape",
-    32: " ",
-    33: "PageUp",
-    34: "PageDown",
-    35: "End",
-    36: "Home",
-    37: "ArrowLeft",
-    38: "ArrowUp",
-    39: "ArrowRight",
-    40: "ArrowDown",
-    44: "PrintScreen",
-    45: "Insert",
-    46: "Delete",
-    59: ";",
-    61: "=",
-    91: "Meta",
-    92: "Meta",
-    106: "*",
-    107: "+",
-    108: ",",
-    109: "-",
-    110: ".",
-    111: "/",
-    144: "NumLock",
-    145: "ScrollLock",
-    160: "Shift",
-    161: "Shift",
-    162: "Control",
-    163: "Control",
-    164: "Alt",
-    165: "Alt",
-    173: "-",
-    186: ";",
-    187: "=",
-    188: ",",
-    189: "-",
-    190: ".",
-    191: "/",
-    192: "`",
-    219: "[",
-    220: "\\",
-    221: "]",
-    222: "'"
-  };
-
-  var shift = {
-    48: ")",
-    49: "!",
-    50: "@",
-    51: "#",
-    52: "$",
-    53: "%",
-    54: "^",
-    55: "&",
-    56: "*",
-    57: "(",
-    59: ":",
-    61: "+",
-    173: "_",
-    186: ":",
-    187: "+",
-    188: "<",
-    189: "_",
-    190: ">",
-    191: "?",
-    192: "~",
-    219: "{",
-    220: "|",
-    221: "}",
-    222: "\""
-  };
-
-  var chrome$1 = typeof navigator != "undefined" && /Chrome\/(\d+)/.exec(navigator.userAgent);
-  var mac = typeof navigator != "undefined" && /Mac/.test(navigator.platform);
-  mac || chrome$1 && +chrome$1[1] < 57;
-
-  // Fill in the digit keys
-  for (var i$2 = 0; i$2 < 10; i$2++) base[48 + i$2] = base[96 + i$2] = String(i$2);
-
-  // The function keys
-  for (var i$2 = 1; i$2 <= 24; i$2++) base[i$2 + 111] = "F" + i$2;
-
-  // And the alphabetic keys
-  for (var i$2 = 65; i$2 <= 90; i$2++) {
-    base[i$2] = String.fromCharCode(i$2 + 32);
-    shift[i$2] = String.fromCharCode(i$2);
+  function updateAttrs(dom, prev, attrs) {
+      let changed = null;
+      if (prev)
+          for (let name in prev)
+              if (!(attrs && name in attrs))
+                  dom.removeAttribute(changed = name);
+      if (attrs)
+          for (let name in attrs)
+              if (!(prev && prev[name] == attrs[name]))
+                  dom.setAttribute(changed = name, attrs[name]);
+      return !!changed;
   }
 
-  // For each code that doesn't have a shift-equivalent, copy the base name
-  for (var code in base) if (!shift.hasOwnProperty(code)) shift[code] = base[code];
-
-  function getSelection(root) {
-      let target;
-      // Browsers differ on whether shadow roots have a getSelection
-      // method. If it exists, use that, otherwise, call it on the
-      // document.
-      if (root.nodeType == 11) { // Shadow root
-          target = root.getSelection ? root : root.ownerDocument;
-      }
-      else {
-          target = root;
+  /**
+  Widgets added to the content are described by subclasses of this
+  class. Using a description object like that makes it possible to
+  delay creating of the DOM structure for a widget until it is
+  needed, and to avoid redrawing widgets even if the decorations
+  that define them are recreated.
+  */
+  class WidgetType {
+      /**
+      Compare this instance to another instance of the same type.
+      (TypeScript can't express this, but only instances of the same
+      specific class will be passed to this method.) This is used to
+      avoid redrawing widgets when they are replaced by a new
+      decoration of the same type. The default implementation just
+      returns `false`, which will cause new instances of the widget to
+      always be redrawn.
+      */
+      eq(widget) { return false; }
+      /**
+      Update a DOM element created by a widget of the same type (but
+      different, non-`eq` content) to reflect this widget. May return
+      true to indicate that it could update, false to indicate it
+      couldn't (in which case the widget will be redrawn). The default
+      implementation just returns false.
+      */
+      updateDOM(dom, view) { return false; }
+      /**
+      @internal
+      */
+      compare(other) {
+          return this == other || this.constructor == other.constructor && this.eq(other);
       }
-      return target.getSelection();
-  }
-  function contains(dom, node) {
-      return node ? dom == node || dom.contains(node.nodeType != 1 ? node.parentNode : node) : false;
-  }
-  function deepActiveElement(doc) {
-      let elt = doc.activeElement;
-      while (elt && elt.shadowRoot)
-          elt = elt.shadowRoot.activeElement;
-      return elt;
+      /**
+      The estimated height this widget will have, to be used when
+      estimating the height of content that hasn't been drawn. May
+      return -1 to indicate you don't know. The default implementation
+      returns -1.
+      */
+      get estimatedHeight() { return -1; }
+      /**
+      For inline widgets that are displayed inline (as opposed to
+      `inline-block`) and introduce line breaks (through `<br>` tags
+      or textual newlines), this must indicate the amount of line
+      breaks they introduce. Defaults to 0.
+      */
+      get lineBreaks() { return 0; }
+      /**
+      Can be used to configure which kinds of events inside the widget
+      should be ignored by the editor. The default is to ignore all
+      events.
+      */
+      ignoreEvent(event) { return true; }
+      /**
+      Override the way screen coordinates for positions at/in the
+      widget are found. `pos` will be the offset into the widget, and
+      `side` the side of the position that is being queried—less than
+      zero for before, greater than zero for after, and zero for
+      directly at that position.
+      */
+      coordsAt(dom, pos, side) { return null; }
+      /**
+      @internal
+      */
+      get customView() { return null; }
+      /**
+      @internal
+      */
+      get isHidden() { return false; }
+      /**
+      This is called when the an instance of the widget is removed
+      from the editor view.
+      */
+      destroy(dom) { }
   }
-  function hasSelection(dom, selection) {
-      if (!selection.anchorNode)
-          return false;
-      try {
-          // Firefox will raise 'permission denied' errors when accessing
-          // properties of `sel.anchorNode` when it's in a generated CSS
-          // element.
-          return contains(dom, selection.anchorNode);
+  /**
+  The different types of blocks that can occur in an editor view.
+  */
+  var BlockType = /*@__PURE__*/(function (BlockType) {
+      /**
+      A line of text.
+      */
+      BlockType[BlockType["Text"] = 0] = "Text";
+      /**
+      A block widget associated with the position after it.
+      */
+      BlockType[BlockType["WidgetBefore"] = 1] = "WidgetBefore";
+      /**
+      A block widget associated with the position before it.
+      */
+      BlockType[BlockType["WidgetAfter"] = 2] = "WidgetAfter";
+      /**
+      A block widget [replacing](https://codemirror.net/6/docs/ref/#view.Decoration^replace) a range of content.
+      */
+      BlockType[BlockType["WidgetRange"] = 3] = "WidgetRange";
+  return BlockType})(BlockType || (BlockType = {}));
+  /**
+  A decoration provides information on how to draw or style a piece
+  of content. You'll usually use it wrapped in a
+  [`Range`](https://codemirror.net/6/docs/ref/#state.Range), which adds a start and end position.
+  @nonabstract
+  */
+  class Decoration extends RangeValue {
+      constructor(
+      /**
+      @internal
+      */
+      startSide, 
+      /**
+      @internal
+      */
+      endSide, 
+      /**
+      @internal
+      */
+      widget, 
+      /**
+      The config object used to create this decoration. You can
+      include additional properties in there to store metadata about
+      your decoration.
+      */
+      spec) {
+          super();
+          this.startSide = startSide;
+          this.endSide = endSide;
+          this.widget = widget;
+          this.spec = spec;
       }
-      catch (_) {
-          return false;
+      /**
+      @internal
+      */
+      get heightRelevant() { return false; }
+      /**
+      Create a mark decoration, which influences the styling of the
+      content in its range. Nested mark decorations will cause nested
+      DOM elements to be created. Nesting order is determined by
+      precedence of the [facet](https://codemirror.net/6/docs/ref/#view.EditorView^decorations), with
+      the higher-precedence decorations creating the inner DOM nodes.
+      Such elements are split on line boundaries and on the boundaries
+      of lower-precedence decorations.
+      */
+      static mark(spec) {
+          return new MarkDecoration(spec);
       }
-  }
-  function clientRectsFor(dom) {
-      if (dom.nodeType == 3)
-          return textRange(dom, 0, dom.nodeValue.length).getClientRects();
-      else if (dom.nodeType == 1)
-          return dom.getClientRects();
-      else
-          return [];
-  }
-  // Scans forward and backward through DOM positions equivalent to the
-  // given one to see if the two are in the same place (i.e. after a
-  // text node vs at the end of that text node)
-  function isEquivalentPosition(node, off, targetNode, targetOff) {
-      return targetNode ? (scanFor(node, off, targetNode, targetOff, -1) ||
-          scanFor(node, off, targetNode, targetOff, 1)) : false;
-  }
-  function domIndex(node) {
-      for (var index = 0;; index++) {
-          node = node.previousSibling;
-          if (!node)
-              return index;
+      /**
+      Create a widget decoration, which displays a DOM element at the
+      given position.
+      */
+      static widget(spec) {
+          let side = Math.max(-10000, Math.min(10000, spec.side || 0)), block = !!spec.block;
+          side += (block && !spec.inlineOrder)
+              ? (side > 0 ? 300000000 /* BlockAfter */ : -400000000 /* BlockBefore */)
+              : (side > 0 ? 100000000 /* InlineAfter */ : -100000000 /* InlineBefore */);
+          return new PointDecoration(spec, side, side, block, spec.widget || null, false);
       }
-  }
-  function scanFor(node, off, targetNode, targetOff, dir) {
-      for (;;) {
-          if (node == targetNode && off == targetOff)
-              return true;
-          if (off == (dir < 0 ? 0 : maxOffset(node))) {
-              if (node.nodeName == "DIV")
-                  return false;
-              let parent = node.parentNode;
-              if (!parent || parent.nodeType != 1)
-                  return false;
-              off = domIndex(node) + (dir < 0 ? 0 : 1);
-              node = parent;
-          }
-          else if (node.nodeType == 1) {
-              node = node.childNodes[off + (dir < 0 ? -1 : 0)];
-              if (node.nodeType == 1 && node.contentEditable == "false")
-                  return false;
-              off = dir < 0 ? maxOffset(node) : 0;
+      /**
+      Create a replace decoration which replaces the given range with
+      a widget, or simply hides it.
+      */
+      static replace(spec) {
+          let block = !!spec.block, startSide, endSide;
+          if (spec.isBlockGap) {
+              startSide = -500000000 /* GapStart */;
+              endSide = 400000000 /* GapEnd */;
           }
           else {
-              return false;
+              let { start, end } = getInclusive(spec, block);
+              startSide = (start ? (block ? -300000000 /* BlockIncStart */ : -1 /* InlineIncStart */) : 500000000 /* NonIncStart */) - 1;
+              endSide = (end ? (block ? 200000000 /* BlockIncEnd */ : 1 /* InlineIncEnd */) : -600000000 /* NonIncEnd */) + 1;
           }
+          return new PointDecoration(spec, startSide, endSide, block, spec.widget || null, true);
       }
-  }
-  function maxOffset(node) {
-      return node.nodeType == 3 ? node.nodeValue.length : node.childNodes.length;
-  }
-  const Rect0 = { left: 0, right: 0, top: 0, bottom: 0 };
-  function flattenRect(rect, left) {
-      let x = left ? rect.left : rect.right;
-      return { left: x, right: x, top: rect.top, bottom: rect.bottom };
-  }
-  function windowRect(win) {
-      return { left: 0, right: win.innerWidth,
-          top: 0, bottom: win.innerHeight };
-  }
-  function scrollRectIntoView(dom, rect, side, x, y, xMargin, yMargin, ltr) {
-      let doc = dom.ownerDocument, win = doc.defaultView || window;
-      for (let cur = dom; cur;) {
-          if (cur.nodeType == 1) { // Element
-              let bounding, top = cur == doc.body;
-              if (top) {
-                  bounding = windowRect(win);
-              }
-              else {
-                  if (cur.scrollHeight <= cur.clientHeight && cur.scrollWidth <= cur.clientWidth) {
-                      cur = cur.assignedSlot || cur.parentNode;
-                      continue;
-                  }
-                  let rect = cur.getBoundingClientRect();
-                  // Make sure scrollbar width isn't included in the rectangle
-                  bounding = { left: rect.left, right: rect.left + cur.clientWidth,
-                      top: rect.top, bottom: rect.top + cur.clientHeight };
-              }
-              let moveX = 0, moveY = 0;
-              if (y == "nearest") {
-                  if (rect.top < bounding.top) {
-                      moveY = -(bounding.top - rect.top + yMargin);
-                      if (side > 0 && rect.bottom > bounding.bottom + moveY)
-                          moveY = rect.bottom - bounding.bottom + moveY + yMargin;
-                  }
-                  else if (rect.bottom > bounding.bottom) {
-                      moveY = rect.bottom - bounding.bottom + yMargin;
-                      if (side < 0 && (rect.top - moveY) < bounding.top)
-                          moveY = -(bounding.top + moveY - rect.top + yMargin);
-                  }
-              }
-              else {
-                  let rectHeight = rect.bottom - rect.top, boundingHeight = bounding.bottom - bounding.top;
-                  let targetTop = y == "center" && rectHeight <= boundingHeight ? rect.top + rectHeight / 2 - boundingHeight / 2 :
-                      y == "start" || y == "center" && side < 0 ? rect.top - yMargin :
-                          rect.bottom - boundingHeight + yMargin;
-                  moveY = targetTop - bounding.top;
-              }
-              if (x == "nearest") {
-                  if (rect.left < bounding.left) {
-                      moveX = -(bounding.left - rect.left + xMargin);
-                      if (side > 0 && rect.right > bounding.right + moveX)
-                          moveX = rect.right - bounding.right + moveX + xMargin;
-                  }
-                  else if (rect.right > bounding.right) {
-                      moveX = rect.right - bounding.right + xMargin;
-                      if (side < 0 && rect.left < bounding.left + moveX)
-                          moveX = -(bounding.left + moveX - rect.left + xMargin);
-                  }
-              }
-              else {
-                  let targetLeft = x == "center" ? rect.left + (rect.right - rect.left) / 2 - (bounding.right - bounding.left) / 2 :
-                      (x == "start") == ltr ? rect.left - xMargin :
-                          rect.right - (bounding.right - bounding.left) + xMargin;
-                  moveX = targetLeft - bounding.left;
-              }
-              if (moveX || moveY) {
-                  if (top) {
-                      win.scrollBy(moveX, moveY);
-                  }
-                  else {
-                      let movedX = 0, movedY = 0;
-                      if (moveY) {
-                          let start = cur.scrollTop;
-                          cur.scrollTop += moveY;
-                          movedY = cur.scrollTop - start;
-                      }
-                      if (moveX) {
-                          let start = cur.scrollLeft;
-                          cur.scrollLeft += moveX;
-                          movedX = cur.scrollLeft - start;
-                      }
-                      rect = { left: rect.left - movedX, top: rect.top - movedY,
-                          right: rect.right - movedX, bottom: rect.bottom - movedY };
-                      if (movedX && Math.abs(movedX - moveX) < 1)
-                          x = "nearest";
-                      if (movedY && Math.abs(movedY - moveY) < 1)
-                          y = "nearest";
-                  }
-              }
-              if (top)
-                  break;
-              cur = cur.assignedSlot || cur.parentNode;
-          }
-          else if (cur.nodeType == 11) { // A shadow root
-              cur = cur.host;
-          }
-          else {
-              break;
-          }
+      /**
+      Create a line decoration, which can add DOM attributes to the
+      line starting at the given position.
+      */
+      static line(spec) {
+          return new LineDecoration(spec);
+      }
+      /**
+      Build a [`DecorationSet`](https://codemirror.net/6/docs/ref/#view.DecorationSet) from the given
+      decorated range or ranges. If the ranges aren't already sorted,
+      pass `true` for `sort` to make the library sort them for you.
+      */
+      static set(of, sort = false) {
+          return RangeSet.of(of, sort);
       }
+      /**
+      @internal
+      */
+      hasHeight() { return this.widget ? this.widget.estimatedHeight > -1 : false; }
   }
-  class DOMSelectionState {
-      constructor() {
-          this.anchorNode = null;
-          this.anchorOffset = 0;
-          this.focusNode = null;
-          this.focusOffset = 0;
+  /**
+  The empty set of decorations.
+  */
+  Decoration.none = RangeSet.empty;
+  class MarkDecoration extends Decoration {
+      constructor(spec) {
+          let { start, end } = getInclusive(spec);
+          super(start ? -1 /* InlineIncStart */ : 500000000 /* NonIncStart */, end ? 1 /* InlineIncEnd */ : -600000000 /* NonIncEnd */, null, spec);
+          this.tagName = spec.tagName || "span";
+          this.class = spec.class || "";
+          this.attrs = spec.attributes || null;
       }
-      eq(domSel) {
-          return this.anchorNode == domSel.anchorNode && this.anchorOffset == domSel.anchorOffset &&
-              this.focusNode == domSel.focusNode && this.focusOffset == domSel.focusOffset;
+      eq(other) {
+          return this == other ||
+              other instanceof MarkDecoration &&
+                  this.tagName == other.tagName &&
+                  this.class == other.class &&
+                  attrsEq(this.attrs, other.attrs);
       }
-      setRange(range) {
-          this.set(range.anchorNode, range.anchorOffset, range.focusNode, range.focusOffset);
+      range(from, to = from) {
+          if (from >= to)
+              throw new RangeError("Mark decorations may not be empty");
+          return super.range(from, to);
       }
-      set(anchorNode, anchorOffset, focusNode, focusOffset) {
-          this.anchorNode = anchorNode;
-          this.anchorOffset = anchorOffset;
-          this.focusNode = focusNode;
-          this.focusOffset = focusOffset;
+  }
+  MarkDecoration.prototype.point = false;
+  class LineDecoration extends Decoration {
+      constructor(spec) {
+          super(-200000000 /* Line */, -200000000 /* Line */, null, spec);
+      }
+      eq(other) {
+          return other instanceof LineDecoration &&
+              this.spec.class == other.spec.class &&
+              attrsEq(this.spec.attributes, other.spec.attributes);
+      }
+      range(from, to = from) {
+          if (to != from)
+              throw new RangeError("Line decoration ranges must be zero-length");
+          return super.range(from, to);
       }
   }
-  let preventScrollSupported = null;
-  // Feature-detects support for .focus({preventScroll: true}), and uses
-  // a fallback kludge when not supported.
-  function focusPreventScroll(dom) {
-      if (dom.setActive)
-          return dom.setActive(); // in IE
-      if (preventScrollSupported)
-          return dom.focus(preventScrollSupported);
-      let stack = [];
-      for (let cur = dom; cur; cur = cur.parentNode) {
-          stack.push(cur, cur.scrollTop, cur.scrollLeft);
-          if (cur == cur.ownerDocument)
-              break;
+  LineDecoration.prototype.mapMode = MapMode.TrackBefore;
+  LineDecoration.prototype.point = true;
+  class PointDecoration extends Decoration {
+      constructor(spec, startSide, endSide, block, widget, isReplace) {
+          super(startSide, endSide, widget, spec);
+          this.block = block;
+          this.isReplace = isReplace;
+          this.mapMode = !block ? MapMode.TrackDel : startSide <= 0 ? MapMode.TrackBefore : MapMode.TrackAfter;
       }
-      dom.focus(preventScrollSupported == null ? {
-          get preventScroll() {
-              preventScrollSupported = { preventScroll: true };
-              return true;
-          }
-      } : undefined);
-      if (!preventScrollSupported) {
-          preventScrollSupported = false;
-          for (let i = 0; i < stack.length;) {
-              let elt = stack[i++], top = stack[i++], left = stack[i++];
-              if (elt.scrollTop != top)
-                  elt.scrollTop = top;
-              if (elt.scrollLeft != left)
-                  elt.scrollLeft = left;
-          }
+      // Only relevant when this.block == true
+      get type() {
+          return this.startSide < this.endSide ? BlockType.WidgetRange
+              : this.startSide <= 0 ? BlockType.WidgetBefore : BlockType.WidgetAfter;
+      }
+      get heightRelevant() {
+          return this.block || !!this.widget && (this.widget.estimatedHeight >= 5 || this.widget.lineBreaks > 0);
+      }
+      eq(other) {
+          return other instanceof PointDecoration &&
+              widgetsEq(this.widget, other.widget) &&
+              this.block == other.block &&
+              this.startSide == other.startSide && this.endSide == other.endSide;
+      }
+      range(from, to = from) {
+          if (this.isReplace && (from > to || (from == to && this.startSide > 0 && this.endSide <= 0)))
+              throw new RangeError("Invalid range for replacement decoration");
+          if (!this.isReplace && to != from)
+              throw new RangeError("Widget decorations can only have zero-length ranges");
+          return super.range(from, to);
       }
   }
-  let scratchRange;
-  function textRange(node, from, to = from) {
-      let range = scratchRange || (scratchRange = document.createRange());
-      range.setEnd(node, to);
-      range.setStart(node, from);
-      return range;
-  }
-  function dispatchKey(elt, name, code) {
-      let options = { key: name, code: name, keyCode: code, which: code, cancelable: true };
-      let down = new KeyboardEvent("keydown", options);
-      down.synthetic = true;
-      elt.dispatchEvent(down);
-      let up = new KeyboardEvent("keyup", options);
-      up.synthetic = true;
-      elt.dispatchEvent(up);
-      return down.defaultPrevented || up.defaultPrevented;
+  PointDecoration.prototype.point = true;
+  function getInclusive(spec, block = false) {
+      let { inclusiveStart: start, inclusiveEnd: end } = spec;
+      if (start == null)
+          start = spec.inclusive;
+      if (end == null)
+          end = spec.inclusive;
+      return { start: start !== null && start !== void 0 ? start : block, end: end !== null && end !== void 0 ? end : block };
   }
-  function getRoot(node) {
-      while (node) {
-          if (node && (node.nodeType == 9 || node.nodeType == 11 && node.host))
-              return node;
-          node = node.assignedSlot || node.parentNode;
-      }
-      return null;
+  function widgetsEq(a, b) {
+      return a == b || !!(a && b && a.compare(b));
   }
-  function clearAttributes(node) {
-      while (node.attributes.length)
-          node.removeAttributeNode(node.attributes[0]);
+  function addRange(from, to, ranges, margin = 0) {
+      let last = ranges.length - 1;
+      if (last >= 0 && ranges[last] + margin >= from)
+          ranges[last] = Math.max(ranges[last], to);
+      else
+          ranges.push(from, to);
   }
-  function atElementStart(doc, selection) {
-      let node = selection.focusNode, offset = selection.focusOffset;
-      if (!node || selection.anchorNode != node || selection.anchorOffset != offset)
-          return false;
-      for (;;) {
-          if (offset) {
-              if (node.nodeType != 1)
+
+  class LineView extends ContentView {
+      constructor() {
+          super(...arguments);
+          this.children = [];
+          this.length = 0;
+          this.prevAttrs = undefined;
+          this.attrs = null;
+          this.breakAfter = 0;
+      }
+      // Consumes source
+      merge(from, to, source, hasStart, openStart, openEnd) {
+          if (source) {
+              if (!(source instanceof LineView))
                   return false;
-              let prev = node.childNodes[offset - 1];
-              if (prev.contentEditable == "false")
-                  offset--;
-              else {
-                  node = prev;
-                  offset = maxOffset(node);
-              }
-          }
-          else if (node == doc) {
-              return true;
-          }
-          else {
-              offset = domIndex(node);
-              node = node.parentNode;
+              if (!this.dom)
+                  source.transferDOM(this); // Reuse source.dom when appropriate
           }
+          if (hasStart)
+              this.setDeco(source ? source.attrs : null);
+          mergeChildrenInto(this, from, to, source ? source.children : [], openStart, openEnd);
+          return true;
       }
-  }
-
-  class DOMPos {
-      constructor(node, offset, precise = true) {
-          this.node = node;
-          this.offset = offset;
-          this.precise = precise;
+      split(at) {
+          let end = new LineView;
+          end.breakAfter = this.breakAfter;
+          if (this.length == 0)
+              return end;
+          let { i, off } = this.childPos(at);
+          if (off) {
+              end.append(this.children[i].split(off), 0);
+              this.children[i].merge(off, this.children[i].length, null, false, 0, 0);
+              i++;
+          }
+          for (let j = i; j < this.children.length; j++)
+              end.append(this.children[j], 0);
+          while (i > 0 && this.children[i - 1].length == 0)
+              this.children[--i].destroy();
+          this.children.length = i;
+          this.markDirty();
+          this.length = at;
+          return end;
       }
-      static before(dom, precise) { return new DOMPos(dom.parentNode, domIndex(dom), precise); }
-      static after(dom, precise) { return new DOMPos(dom.parentNode, domIndex(dom) + 1, precise); }
-  }
-  const noChildren = [];
-  class ContentView {
-      constructor() {
-          this.parent = null;
+      transferDOM(other) {
+          if (!this.dom)
+              return;
+          this.markDirty();
+          other.setDOM(this.dom);
+          other.prevAttrs = this.prevAttrs === undefined ? this.attrs : this.prevAttrs;
+          this.prevAttrs = undefined;
           this.dom = null;
-          this.dirty = 2 /* Dirty.Node */;
       }
-      get editorView() {
-          if (!this.parent)
-              throw new Error("Accessing view in orphan content view");
-          return this.parent.editorView;
-      }
-      get overrideDOMText() { return null; }
-      get posAtStart() {
-          return this.parent ? this.parent.posBefore(this) : 0;
+      setDeco(attrs) {
+          if (!attrsEq(this.attrs, attrs)) {
+              if (this.dom) {
+                  this.prevAttrs = this.attrs;
+                  this.markDirty();
+              }
+              this.attrs = attrs;
+          }
       }
-      get posAtEnd() {
-          return this.posAtStart + this.length;
+      append(child, openStart) {
+          joinInlineInto(this, child, openStart);
       }
-      posBefore(view) {
-          let pos = this.posAtStart;
-          for (let child of this.children) {
-              if (child == view)
-                  return pos;
-              pos += child.length + child.breakAfter;
-          }
-          throw new RangeError("Invalid child in posBefore");
+      // Only called when building a line view in ContentBuilder
+      addLineDeco(deco) {
+          let attrs = deco.spec.attributes, cls = deco.spec.class;
+          if (attrs)
+              this.attrs = combineAttrs(attrs, this.attrs || {});
+          if (cls)
+              this.attrs = combineAttrs({ class: cls }, this.attrs || {});
       }
-      posAfter(view) {
-          return this.posBefore(view) + view.length;
+      domAtPos(pos) {
+          return inlineDOMAtPos(this, pos);
       }
-      // Will return a rectangle directly before (when side < 0), after
-      // (side > 0) or directly on (when the browser supports it) the
-      // given position.
-      coordsAt(_pos, _side) { return null; }
-      sync(track) {
-          if (this.dirty & 2 /* Dirty.Node */) {
-              let parent = this.dom;
-              let prev = null, next;
-              for (let child of this.children) {
-                  if (child.dirty) {
-                      if (!child.dom && (next = prev ? prev.nextSibling : parent.firstChild)) {
-                          let contentView = ContentView.get(next);
-                          if (!contentView || !contentView.parent && contentView.canReuseDOM(child))
-                              child.reuseDOM(next);
-                      }
-                      child.sync(track);
-                      child.dirty = 0 /* Dirty.Not */;
-                  }
-                  next = prev ? prev.nextSibling : parent.firstChild;
-                  if (track && !track.written && track.node == parent && next != child.dom)
-                      track.written = true;
-                  if (child.dom.parentNode == parent) {
-                      while (next && next != child.dom)
-                          next = rm$1(next);
-                  }
-                  else {
-                      parent.insertBefore(child.dom, next);
-                  }
-                  prev = child.dom;
-              }
-              next = prev ? prev.nextSibling : parent.firstChild;
-              if (next && track && track.node == parent)
-                  track.written = true;
-              while (next)
-                  next = rm$1(next);
-          }
-          else if (this.dirty & 1 /* Dirty.Child */) {
-              for (let child of this.children)
-                  if (child.dirty) {
-                      child.sync(track);
-                      child.dirty = 0 /* Dirty.Not */;
-                  }
+      reuseDOM(node) {
+          if (node.nodeName == "DIV") {
+              this.setDOM(node);
+              this.dirty |= 4 /* Attrs */ | 2 /* Node */;
           }
       }
-      reuseDOM(_dom) { }
-      localPosFromDOM(node, offset) {
-          let after;
-          if (node == this.dom) {
-              after = this.dom.childNodes[offset];
+      sync(view, track) {
+          var _a;
+          if (!this.dom) {
+              this.setDOM(document.createElement("div"));
+              this.dom.className = "cm-line";
+              this.prevAttrs = this.attrs ? null : undefined;
           }
-          else {
-              let bias = maxOffset(node) == 0 ? 0 : offset == 0 ? -1 : 1;
-              for (;;) {
-                  let parent = node.parentNode;
-                  if (parent == this.dom)
-                      break;
-                  if (bias == 0 && parent.firstChild != parent.lastChild) {
-                      if (node == parent.firstChild)
-                          bias = -1;
-                      else
-                          bias = 1;
-                  }
-                  node = parent;
-              }
-              if (bias < 0)
-                  after = node;
-              else
-                  after = node.nextSibling;
+          else if (this.dirty & 4 /* Attrs */) {
+              clearAttributes(this.dom);
+              this.dom.className = "cm-line";
+              this.prevAttrs = this.attrs ? null : undefined;
           }
-          if (after == this.dom.firstChild)
-              return 0;
-          while (after && !ContentView.get(after))
-              after = after.nextSibling;
-          if (!after)
-              return this.length;
-          for (let i = 0, pos = 0;; i++) {
-              let child = this.children[i];
-              if (child.dom == after)
-                  return pos;
-              pos += child.length + child.breakAfter;
+          if (this.prevAttrs !== undefined) {
+              updateAttrs(this.dom, this.prevAttrs, this.attrs);
+              this.dom.classList.add("cm-line");
+              this.prevAttrs = undefined;
           }
-      }
-      domBoundsAround(from, to, offset = 0) {
-          let fromI = -1, fromStart = -1, toI = -1, toEnd = -1;
-          for (let i = 0, pos = offset, prevEnd = offset; i < this.children.length; i++) {
-              let child = this.children[i], end = pos + child.length;
-              if (pos < from && end > to)
-                  return child.domBoundsAround(from, to, pos);
-              if (end >= from && fromI == -1) {
-                  fromI = i;
-                  fromStart = pos;
-              }
-              if (pos > to && child.dom.parentNode == this.dom) {
-                  toI = i;
-                  toEnd = prevEnd;
-                  break;
-              }
-              prevEnd = end;
-              pos = end + child.breakAfter;
+          super.sync(view, track);
+          let last = this.dom.lastChild;
+          while (last && ContentView.get(last) instanceof MarkView)
+              last = last.lastChild;
+          if (!last || !this.length ||
+              last.nodeName != "BR" && ((_a = ContentView.get(last)) === null || _a === void 0 ? void 0 : _a.isEditable) == false &&
+                  (!browser.ios || !this.children.some(ch => ch instanceof TextView))) {
+              let hack = document.createElement("BR");
+              hack.cmIgnore = true;
+              this.dom.appendChild(hack);
           }
-          return { from: fromStart, to: toEnd < 0 ? offset + this.length : toEnd,
-              startDOM: (fromI ? this.children[fromI - 1].dom.nextSibling : null) || this.dom.firstChild,
-              endDOM: toI < this.children.length && toI >= 0 ? this.children[toI].dom : null };
       }
-      markDirty(andParent = false) {
-          this.dirty |= 2 /* Dirty.Node */;
-          this.markParentsDirty(andParent);
+      measureTextSize() {
+          if (this.children.length == 0 || this.length > 20)
+              return null;
+          let totalWidth = 0, textHeight;
+          for (let child of this.children) {
+              if (!(child instanceof TextView) || /[^ -~]/.test(child.text))
+                  return null;
+              let rects = clientRectsFor(child.dom);
+              if (rects.length != 1)
+                  return null;
+              totalWidth += rects[0].width;
+              textHeight = rects[0].height;
+          }
+          return !totalWidth ? null : {
+              lineHeight: this.dom.getBoundingClientRect().height,
+              charWidth: totalWidth / this.length,
+              textHeight
+          };
       }
-      markParentsDirty(childList) {
-          for (let parent = this.parent; parent; parent = parent.parent) {
-              if (childList)
-                  parent.dirty |= 2 /* Dirty.Node */;
-              if (parent.dirty & 1 /* Dirty.Child */)
-                  return;
-              parent.dirty |= 1 /* Dirty.Child */;
-              childList = false;
+      coordsAt(pos, side) {
+          let rect = coordsInChildren(this, pos, side);
+          // Correct rectangle height for empty lines when the returned
+          // height is larger than the text height.
+          if (!this.children.length && rect && this.parent) {
+              let { heightOracle } = this.parent.view.viewState, height = rect.bottom - rect.top;
+              if (Math.abs(height - heightOracle.lineHeight) < 2 && heightOracle.textHeight < height) {
+                  let dist = (height - heightOracle.textHeight) / 2;
+                  return { top: rect.top + dist, bottom: rect.bottom - dist, left: rect.left, right: rect.left };
+              }
           }
+          return rect;
       }
-      setParent(parent) {
-          if (this.parent != parent) {
-              this.parent = parent;
-              if (this.dirty)
-                  this.markParentsDirty(true);
+      become(_other) { return false; }
+      get type() { return BlockType.Text; }
+      static find(docView, pos) {
+          for (let i = 0, off = 0; i < docView.children.length; i++) {
+              let block = docView.children[i], end = off + block.length;
+              if (end >= pos) {
+                  if (block instanceof LineView)
+                      return block;
+                  if (end > pos)
+                      break;
+              }
+              off = end + block.breakAfter;
           }
+          return null;
       }
-      setDOM(dom) {
-          if (this.dom)
-              this.dom.cmView = null;
-          this.dom = dom;
-          dom.cmView = this;
+  }
+  class BlockWidgetView extends ContentView {
+      constructor(widget, length, type) {
+          super();
+          this.widget = widget;
+          this.length = length;
+          this.type = type;
+          this.breakAfter = 0;
+          this.prevWidget = null;
       }
-      get rootView() {
-          for (let v = this;;) {
-              let parent = v.parent;
-              if (!parent)
-                  return v;
-              v = parent;
-          }
+      merge(from, to, source, _takeDeco, openStart, openEnd) {
+          if (source && (!(source instanceof BlockWidgetView) || !this.widget.compare(source.widget) ||
+              from > 0 && openStart <= 0 || to < this.length && openEnd <= 0))
+              return false;
+          this.length = from + (source ? source.length : 0) + (this.length - to);
+          return true;
       }
-      replaceChildren(from, to, children = noChildren) {
-          this.markDirty();
-          for (let i = from; i < to; i++) {
-              let child = this.children[i];
-              if (child.parent == this)
-                  child.destroy();
-          }
-          this.children.splice(from, to - from, ...children);
-          for (let i = 0; i < children.length; i++)
-              children[i].setParent(this);
+      domAtPos(pos) {
+          return pos == 0 ? DOMPos.before(this.dom) : DOMPos.after(this.dom, pos == this.length);
       }
-      ignoreMutation(_rec) { return false; }
-      ignoreEvent(_event) { return false; }
-      childCursor(pos = this.length) {
-          return new ChildCursor(this.children, pos, this.children.length);
+      split(at) {
+          let len = this.length - at;
+          this.length = at;
+          let end = new BlockWidgetView(this.widget, len, this.type);
+          end.breakAfter = this.breakAfter;
+          return end;
       }
-      childPos(pos, bias = 1) {
-          return this.childCursor().findPos(pos, bias);
+      get children() { return noChildren; }
+      sync(view) {
+          if (!this.dom || !this.widget.updateDOM(this.dom, view)) {
+              if (this.dom && this.prevWidget)
+                  this.prevWidget.destroy(this.dom);
+              this.prevWidget = null;
+              this.setDOM(this.widget.toDOM(view));
+              this.dom.contentEditable = "false";
+          }
       }
-      toString() {
-          let name = this.constructor.name.replace("View", "");
-          return name + (this.children.length ? "(" + this.children.join() + ")" :
-              this.length ? "[" + (name == "Text" ? this.text : this.length) + "]" : "") +
-              (this.breakAfter ? "#" : "");
+      get overrideDOMText() {
+          return this.parent ? this.parent.view.state.doc.slice(this.posAtStart, this.posAtEnd) : Text$1.empty;
       }
-      static get(node) { return node.cmView; }
-      get isEditable() { return true; }
-      merge(from, to, source, hasStart, openStart, openEnd) {
+      domBoundsAround() { return null; }
+      become(other) {
+          if (other instanceof BlockWidgetView &&
+              other.widget.constructor == this.widget.constructor) {
+              if (!other.widget.compare(this.widget))
+                  this.markDirty(true);
+              if (this.dom && !this.prevWidget)
+                  this.prevWidget = this.widget;
+              this.widget = other.widget;
+              this.length = other.length;
+              this.type = other.type;
+              this.breakAfter = other.breakAfter;
+              return true;
+          }
           return false;
       }
-      become(other) { return false; }
-      canReuseDOM(other) { return other.constructor == this.constructor; }
-      // When this is a zero-length view with a side, this should return a
-      // number <= 0 to indicate it is before its position, or a
-      // number > 0 when after its position.
-      getSide() { return 0; }
+      ignoreMutation() { return true; }
+      ignoreEvent(event) { return this.widget.ignoreEvent(event); }
+      get isEditable() { return false; }
+      get isWidget() { return true; }
+      coordsAt(pos, side) {
+          return this.widget.coordsAt(this.dom, pos, side);
+      }
       destroy() {
-          this.parent = null;
+          super.destroy();
+          if (this.dom)
+              this.widget.destroy(this.dom);
       }
   }
-  ContentView.prototype.breakAfter = 0;
-  // Remove a DOM node and return its next sibling.
-  function rm$1(dom) {
-      let next = dom.nextSibling;
-      dom.parentNode.removeChild(dom);
-      return next;
-  }
-  class ChildCursor {
-      constructor(children, pos, i) {
-          this.children = children;
+
+  class ContentBuilder {
+      constructor(doc, pos, end, disallowBlockEffectsFor) {
+          this.doc = doc;
           this.pos = pos;
-          this.i = i;
-          this.off = 0;
+          this.end = end;
+          this.disallowBlockEffectsFor = disallowBlockEffectsFor;
+          this.content = [];
+          this.curLine = null;
+          this.breakAtStart = 0;
+          this.pendingBuffer = 0 /* No */;
+          this.bufferMarks = [];
+          // Set to false directly after a widget that covers the position after it
+          this.atCursorPos = true;
+          this.openStart = -1;
+          this.openEnd = -1;
+          this.text = "";
+          this.textOff = 0;
+          this.cursor = doc.iter();
+          this.skip = pos;
       }
-      findPos(pos, bias = 1) {
-          for (;;) {
-              if (pos > this.pos || pos == this.pos &&
-                  (bias > 0 || this.i == 0 || this.children[this.i - 1].breakAfter)) {
-                  this.off = pos - this.pos;
-                  return this;
-              }
-              let next = this.children[--this.i];
-              this.pos -= next.length + next.breakAfter;
+      posCovered() {
+          if (this.content.length == 0)
+              return !this.breakAtStart && this.doc.lineAt(this.pos).from != this.pos;
+          let last = this.content[this.content.length - 1];
+          return !last.breakAfter && !(last instanceof BlockWidgetView && last.type == BlockType.WidgetBefore);
+      }
+      getLine() {
+          if (!this.curLine) {
+              this.content.push(this.curLine = new LineView);
+              this.atCursorPos = true;
           }
+          return this.curLine;
       }
-  }
-  function replaceRange(parent, fromI, fromOff, toI, toOff, insert, breakAtStart, openStart, openEnd) {
-      let { children } = parent;
-      let before = children.length ? children[fromI] : null;
-      let last = insert.length ? insert[insert.length - 1] : null;
-      let breakAtEnd = last ? last.breakAfter : breakAtStart;
-      // Change within a single child
-      if (fromI == toI && before && !breakAtStart && !breakAtEnd && insert.length < 2 &&
-          before.merge(fromOff, toOff, insert.length ? last : null, fromOff == 0, openStart, openEnd))
-          return;
-      if (toI < children.length) {
-          let after = children[toI];
-          // Make sure the end of the child after the update is preserved in `after`
-          if (after && toOff < after.length) {
-              // If we're splitting a child, separate part of it to avoid that
-              // being mangled when updating the child before the update.
-              if (fromI == toI) {
-                  after = after.split(toOff);
-                  toOff = 0;
+      flushBuffer(active = this.bufferMarks) {
+          if (this.pendingBuffer) {
+              this.curLine.append(wrapMarks(new WidgetBufferView(-1), active), active.length);
+              this.pendingBuffer = 0 /* No */;
+          }
+      }
+      addBlockWidget(view) {
+          this.flushBuffer();
+          this.curLine = null;
+          this.content.push(view);
+      }
+      finish(openEnd) {
+          if (this.pendingBuffer && openEnd <= this.bufferMarks.length)
+              this.flushBuffer();
+          else
+              this.pendingBuffer = 0 /* No */;
+          if (!this.posCovered())
+              this.getLine();
+      }
+      buildText(length, active, openStart) {
+          while (length > 0) {
+              if (this.textOff == this.text.length) {
+                  let { value, lineBreak, done } = this.cursor.next(this.skip);
+                  this.skip = 0;
+                  if (done)
+                      throw new Error("Ran out of text content when drawing inline views");
+                  if (lineBreak) {
+                      if (!this.posCovered())
+                          this.getLine();
+                      if (this.content.length)
+                          this.content[this.content.length - 1].breakAfter = 1;
+                      else
+                          this.breakAtStart = 1;
+                      this.flushBuffer();
+                      this.curLine = null;
+                      this.atCursorPos = true;
+                      length--;
+                      continue;
+                  }
+                  else {
+                      this.text = value;
+                      this.textOff = 0;
+                  }
               }
-              // If the element after the replacement should be merged with
-              // the last replacing element, update `content`
-              if (!breakAtEnd && last && after.merge(0, toOff, last, true, 0, openEnd)) {
-                  insert[insert.length - 1] = after;
+              let take = Math.min(this.text.length - this.textOff, length, 512 /* Chunk */);
+              this.flushBuffer(active.slice(active.length - openStart));
+              this.getLine().append(wrapMarks(new TextView(this.text.slice(this.textOff, this.textOff + take)), active), openStart);
+              this.atCursorPos = true;
+              this.textOff += take;
+              length -= take;
+              openStart = 0;
+          }
+      }
+      span(from, to, active, openStart) {
+          this.buildText(to - from, active, openStart);
+          this.pos = to;
+          if (this.openStart < 0)
+              this.openStart = openStart;
+      }
+      point(from, to, deco, active, openStart, index) {
+          if (this.disallowBlockEffectsFor[index] && deco instanceof PointDecoration) {
+              if (deco.block)
+                  throw new RangeError("Block decorations may not be specified via plugins");
+              if (to > this.doc.lineAt(this.pos).to)
+                  throw new RangeError("Decorations that replace line breaks may not be specified via plugins");
+          }
+          let len = to - from;
+          if (deco instanceof PointDecoration) {
+              if (deco.block) {
+                  let { type } = deco;
+                  if (type == BlockType.WidgetAfter && !this.posCovered())
+                      this.getLine();
+                  this.addBlockWidget(new BlockWidgetView(deco.widget || new NullWidget("div"), len, type));
               }
               else {
-                  // Remove the start of the after element, if necessary, and
-                  // add it to `content`.
-                  if (toOff)
-                      after.merge(0, toOff, null, false, 0, openEnd);
-                  insert.push(after);
+                  let view = WidgetView.create(deco.widget || new NullWidget("span"), len, len ? 0 : deco.startSide);
+                  let cursorBefore = this.atCursorPos && !view.isEditable && openStart <= active.length &&
+                      (from < to || deco.startSide > 0);
+                  let cursorAfter = !view.isEditable && (from < to || openStart > active.length || deco.startSide <= 0);
+                  let line = this.getLine();
+                  if (this.pendingBuffer == 2 /* IfCursor */ && !cursorBefore && !view.isEditable)
+                      this.pendingBuffer = 0 /* No */;
+                  this.flushBuffer(active);
+                  if (cursorBefore) {
+                      line.append(wrapMarks(new WidgetBufferView(1), active), openStart);
+                      openStart = active.length + Math.max(0, openStart - active.length);
+                  }
+                  line.append(wrapMarks(view, active), openStart);
+                  this.atCursorPos = cursorAfter;
+                  this.pendingBuffer = !cursorAfter ? 0 /* No */ : from < to || openStart > active.length ? 1 /* Yes */ : 2 /* IfCursor */;
+                  if (this.pendingBuffer)
+                      this.bufferMarks = active.slice();
               }
           }
-          else if (after === null || after === void 0 ? void 0 : after.breakAfter) {
-              // The element at `toI` is entirely covered by this range.
-              // Preserve its line break, if any.
-              if (last)
-                  last.breakAfter = 1;
-              else
-                  breakAtStart = 1;
+          else if (this.doc.lineAt(this.pos).from == this.pos) { // Line decoration
+              this.getLine().addLineDeco(deco);
           }
-          // Since we've handled the next element from the current elements
-          // now, make sure `toI` points after that.
-          toI++;
-      }
-      if (before) {
-          before.breakAfter = breakAtStart;
-          if (fromOff > 0) {
-              if (!breakAtStart && insert.length && before.merge(fromOff, before.length, insert[0], false, openStart, 0)) {
-                  before.breakAfter = insert.shift().breakAfter;
+          if (len) {
+              // Advance the iterator past the replaced content
+              if (this.textOff + len <= this.text.length) {
+                  this.textOff += len;
               }
-              else if (fromOff < before.length || before.children.length && before.children[before.children.length - 1].length == 0) {
-                  before.merge(fromOff, before.length, null, false, openStart, 0);
+              else {
+                  this.skip += len - (this.text.length - this.textOff);
+                  this.text = "";
+                  this.textOff = 0;
               }
-              fromI++;
+              this.pos = to;
           }
+          if (this.openStart < 0)
+              this.openStart = openStart;
       }
-      // Try to merge widgets on the boundaries of the replacement
-      while (fromI < toI && insert.length) {
-          if (children[toI - 1].become(insert[insert.length - 1])) {
-              toI--;
-              insert.pop();
-              openEnd = insert.length ? 0 : openStart;
-          }
-          else if (children[fromI].become(insert[0])) {
-              fromI++;
-              insert.shift();
-              openStart = insert.length ? 0 : openEnd;
-          }
-          else {
-              break;
-          }
+      static build(text, from, to, decorations, dynamicDecorationMap) {
+          let builder = new ContentBuilder(text, from, to, dynamicDecorationMap);
+          builder.openEnd = RangeSet.spans(decorations, from, to, builder);
+          if (builder.openStart < 0)
+              builder.openStart = builder.openEnd;
+          builder.finish(builder.openEnd);
+          return builder;
       }
-      if (!insert.length && fromI && toI < children.length && !children[fromI - 1].breakAfter &&
-          children[toI].merge(0, 0, children[fromI - 1], false, openStart, openEnd))
-          fromI--;
-      if (fromI < toI || insert.length)
-          parent.replaceChildren(fromI, toI, insert);
   }
-  function mergeChildrenInto(parent, from, to, insert, openStart, openEnd) {
-      let cur = parent.childCursor();
-      let { i: toI, off: toOff } = cur.findPos(to, 1);
-      let { i: fromI, off: fromOff } = cur.findPos(from, -1);
-      let dLen = from - to;
-      for (let view of insert)
-          dLen += view.length;
-      parent.length += dLen;
-      replaceRange(parent, fromI, fromOff, toI, toOff, insert, 0, openStart, openEnd);
+  function wrapMarks(view, active) {
+      for (let mark of active)
+          view = new MarkView(mark, [view], view.length);
+      return view;
   }
-
-  let nav = typeof navigator != "undefined" ? navigator : { userAgent: "", vendor: "", platform: "" };
-  let doc = typeof document != "undefined" ? document : { documentElement: { style: {} } };
-  const ie_edge = /*@__PURE__*//Edge\/(\d+)/.exec(nav.userAgent);
-  const ie_upto10 = /*@__PURE__*//MSIE \d/.test(nav.userAgent);
-  const ie_11up = /*@__PURE__*//Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(nav.userAgent);
-  const ie = !!(ie_upto10 || ie_11up || ie_edge);
-  const gecko = !ie && /*@__PURE__*//gecko\/(\d+)/i.test(nav.userAgent);
-  const chrome = !ie && /*@__PURE__*//Chrome\/(\d+)/.exec(nav.userAgent);
-  const webkit = "webkitFontSmoothing" in doc.documentElement.style;
-  const safari = !ie && /*@__PURE__*//Apple Computer/.test(nav.vendor);
-  const ios = safari && (/*@__PURE__*//Mobile\/\w+/.test(nav.userAgent) || nav.maxTouchPoints > 2);
-  var browser = {
-      mac: ios || /*@__PURE__*//Mac/.test(nav.platform),
-      windows: /*@__PURE__*//Win/.test(nav.platform),
-      linux: /*@__PURE__*//Linux|X11/.test(nav.platform),
-      ie,
-      ie_version: ie_upto10 ? doc.documentMode || 6 : ie_11up ? +ie_11up[1] : ie_edge ? +ie_edge[1] : 0,
-      gecko,
-      gecko_version: gecko ? +(/*@__PURE__*//Firefox\/(\d+)/.exec(nav.userAgent) || [0, 0])[1] : 0,
-      chrome: !!chrome,
-      chrome_version: chrome ? +chrome[1] : 0,
-      ios,
-      android: /*@__PURE__*//Android\b/.test(nav.userAgent),
-      webkit,
-      safari,
-      webkit_version: webkit ? +(/*@__PURE__*//\bAppleWebKit\/(\d+)/.exec(navigator.userAgent) || [0, 0])[1] : 0,
-      tabSize: doc.documentElement.style.tabSize != null ? "tab-size" : "-moz-tab-size"
-  };
-
-  const MaxJoinLen = 256;
-  class TextView extends ContentView {
-      constructor(text) {
+  class NullWidget extends WidgetType {
+      constructor(tag) {
           super();
-          this.text = text;
-      }
-      get length() { return this.text.length; }
-      createDOM(textDOM) {
-          this.setDOM(textDOM || document.createTextNode(this.text));
-      }
-      sync(track) {
-          if (!this.dom)
-              this.createDOM();
-          if (this.dom.nodeValue != this.text) {
-              if (track && track.node == this.dom)
-                  track.written = true;
-              this.dom.nodeValue = this.text;
-          }
-      }
-      reuseDOM(dom) {
-          if (dom.nodeType == 3)
-              this.createDOM(dom);
-      }
-      merge(from, to, source) {
-          if (source && (!(source instanceof TextView) || this.length - (to - from) + source.length > MaxJoinLen))
-              return false;
-          this.text = this.text.slice(0, from) + (source ? source.text : "") + this.text.slice(to);
-          this.markDirty();
-          return true;
-      }
-      split(from) {
-          let result = new TextView(this.text.slice(from));
-          this.text = this.text.slice(0, from);
-          this.markDirty();
-          return result;
-      }
-      localPosFromDOM(node, offset) {
-          return node == this.dom ? offset : offset ? this.text.length : 0;
+          this.tag = tag;
       }
-      domAtPos(pos) { return new DOMPos(this.dom, pos); }
-      domBoundsAround(_from, _to, offset) {
-          return { from: offset, to: offset + this.length, startDOM: this.dom, endDOM: this.dom.nextSibling };
+      eq(other) { return other.tag == this.tag; }
+      toDOM() { return document.createElement(this.tag); }
+      updateDOM(elt) { return elt.nodeName.toLowerCase() == this.tag; }
+      get isHidden() { return true; }
+  }
+
+  const clickAddsSelectionRange = /*@__PURE__*/Facet.define();
+  const dragMovesSelection$1 = /*@__PURE__*/Facet.define();
+  const mouseSelectionStyle = /*@__PURE__*/Facet.define();
+  const exceptionSink = /*@__PURE__*/Facet.define();
+  const updateListener = /*@__PURE__*/Facet.define();
+  const inputHandler = /*@__PURE__*/Facet.define();
+  const focusChangeEffect = /*@__PURE__*/Facet.define();
+  const perLineTextDirection = /*@__PURE__*/Facet.define({
+      combine: values => values.some(x => x)
+  });
+  const nativeSelectionHidden = /*@__PURE__*/Facet.define({
+      combine: values => values.some(x => x)
+  });
+  class ScrollTarget {
+      constructor(range, y = "nearest", x = "nearest", yMargin = 5, xMargin = 5) {
+          this.range = range;
+          this.y = y;
+          this.x = x;
+          this.yMargin = yMargin;
+          this.xMargin = xMargin;
       }
-      coordsAt(pos, side) {
-          return textCoords(this.dom, pos, side);
+      map(changes) {
+          return changes.empty ? this : new ScrollTarget(this.range.map(changes), this.y, this.x, this.yMargin, this.xMargin);
       }
   }
-  class MarkView extends ContentView {
-      constructor(mark, children = [], length = 0) {
-          super();
-          this.mark = mark;
-          this.children = children;
-          this.length = length;
-          for (let ch of children)
-              ch.setParent(this);
-      }
-      setAttrs(dom) {
-          clearAttributes(dom);
-          if (this.mark.class)
-              dom.className = this.mark.class;
-          if (this.mark.attrs)
-              for (let name in this.mark.attrs)
-                  dom.setAttribute(name, this.mark.attrs[name]);
-          return dom;
+  const scrollIntoView = /*@__PURE__*/StateEffect.define({ map: (t, ch) => t.map(ch) });
+  /**
+  Log or report an unhandled exception in client code. Should
+  probably only be used by extension code that allows client code to
+  provide functions, and calls those functions in a context where an
+  exception can't be propagated to calling code in a reasonable way
+  (for example when in an event handler).
+
+  Either calls a handler registered with
+  [`EditorView.exceptionSink`](https://codemirror.net/6/docs/ref/#view.EditorView^exceptionSink),
+  `window.onerror`, if defined, or `console.error` (in which case
+  it'll pass `context`, when given, as first argument).
+  */
+  function logException(state, exception, context) {
+      let handler = state.facet(exceptionSink);
+      if (handler.length)
+          handler[0](exception);
+      else if (window.onerror)
+          window.onerror(String(exception), context, undefined, undefined, exception);
+      else if (context)
+          console.error(context + ":", exception);
+      else
+          console.error(exception);
+  }
+  const editable = /*@__PURE__*/Facet.define({ combine: values => values.length ? values[0] : true });
+  let nextPluginID = 0;
+  const viewPlugin = /*@__PURE__*/Facet.define();
+  /**
+  View plugins associate stateful values with a view. They can
+  influence the way the content is drawn, and are notified of things
+  that happen in the view.
+  */
+  class ViewPlugin {
+      constructor(
+      /**
+      @internal
+      */
+      id, 
+      /**
+      @internal
+      */
+      create, 
+      /**
+      @internal
+      */
+      domEventHandlers, buildExtensions) {
+          this.id = id;
+          this.create = create;
+          this.domEventHandlers = domEventHandlers;
+          this.extension = buildExtensions(this);
       }
-      reuseDOM(node) {
-          if (node.nodeName == this.mark.tagName.toUpperCase()) {
-              this.setDOM(node);
-              this.dirty |= 4 /* Dirty.Attrs */ | 2 /* Dirty.Node */;
-          }
+      /**
+      Define a plugin from a constructor function that creates the
+      plugin's value, given an editor view.
+      */
+      static define(create, spec) {
+          const { eventHandlers, provide, decorations: deco } = spec || {};
+          return new ViewPlugin(nextPluginID++, create, eventHandlers, plugin => {
+              let ext = [viewPlugin.of(plugin)];
+              if (deco)
+                  ext.push(decorations.of(view => {
+                      let pluginInst = view.plugin(plugin);
+                      return pluginInst ? deco(pluginInst) : Decoration.none;
+                  }));
+              if (provide)
+                  ext.push(provide(plugin));
+              return ext;
+          });
       }
-      sync(track) {
-          if (!this.dom)
-              this.setDOM(this.setAttrs(document.createElement(this.mark.tagName)));
-          else if (this.dirty & 4 /* Dirty.Attrs */)
-              this.setAttrs(this.dom);
-          super.sync(track);
+      /**
+      Create a plugin for a class whose constructor takes a single
+      editor view as argument.
+      */
+      static fromClass(cls, spec) {
+          return ViewPlugin.define(view => new cls(view), spec);
       }
-      merge(from, to, source, _hasStart, openStart, openEnd) {
-          if (source && (!(source instanceof MarkView && source.mark.eq(this.mark)) ||
-              (from && openStart <= 0) || (to < this.length && openEnd <= 0)))
-              return false;
-          mergeChildrenInto(this, from, to, source ? source.children : [], openStart - 1, openEnd - 1);
-          this.markDirty();
-          return true;
+  }
+  class PluginInstance {
+      constructor(spec) {
+          this.spec = spec;
+          // When starting an update, all plugins have this field set to the
+          // update object, indicating they need to be updated. When finished
+          // updating, it is set to `false`. Retrieving a plugin that needs to
+          // be updated with `view.plugin` forces an eager update.
+          this.mustUpdate = null;
+          // This is null when the plugin is initially created, but
+          // initialized on the first update.
+          this.value = null;
       }
-      split(from) {
-          let result = [], off = 0, detachFrom = -1, i = 0;
-          for (let elt of this.children) {
-              let end = off + elt.length;
-              if (end > from)
-                  result.push(off < from ? elt.split(from - off) : elt);
-              if (detachFrom < 0 && off >= from)
-                  detachFrom = i;
-              off = end;
-              i++;
+      update(view) {
+          if (!this.value) {
+              if (this.spec) {
+                  try {
+                      this.value = this.spec.create(view);
+                  }
+                  catch (e) {
+                      logException(view.state, e, "CodeMirror plugin crashed");
+                      this.deactivate();
+                  }
+              }
           }
-          let length = this.length - from;
-          this.length = from;
-          if (detachFrom > -1) {
-              this.children.length = detachFrom;
-              this.markDirty();
+          else if (this.mustUpdate) {
+              let update = this.mustUpdate;
+              this.mustUpdate = null;
+              if (this.value.update) {
+                  try {
+                      this.value.update(update);
+                  }
+                  catch (e) {
+                      logException(update.state, e, "CodeMirror plugin crashed");
+                      if (this.value.destroy)
+                          try {
+                              this.value.destroy();
+                          }
+                          catch (_) { }
+                      this.deactivate();
+                  }
+              }
           }
-          return new MarkView(this.mark, result, length);
-      }
-      domAtPos(pos) {
-          return inlineDOMAtPos(this, pos);
-      }
-      coordsAt(pos, side) {
-          return coordsInChildren(this, pos, side);
+          return this;
       }
-  }
-  function textCoords(text, pos, side) {
-      let length = text.nodeValue.length;
-      if (pos > length)
-          pos = length;
-      let from = pos, to = pos, flatten = 0;
-      if (pos == 0 && side < 0 || pos == length && side >= 0) {
-          if (!(browser.chrome || browser.gecko)) { // These browsers reliably return valid rectangles for empty ranges
-              if (pos) {
-                  from--;
-                  flatten = 1;
-              } // FIXME this is wrong in RTL text
-              else if (to < length) {
-                  to++;
-                  flatten = -1;
+      destroy(view) {
+          var _a;
+          if ((_a = this.value) === null || _a === void 0 ? void 0 : _a.destroy) {
+              try {
+                  this.value.destroy();
+              }
+              catch (e) {
+                  logException(view.state, e, "CodeMirror plugin crashed");
               }
           }
       }
-      else {
-          if (side < 0)
-              from--;
-          else if (to < length)
-              to++;
+      deactivate() {
+          this.spec = this.value = null;
       }
-      let rects = textRange(text, from, to).getClientRects();
-      if (!rects.length)
-          return Rect0;
-      let rect = rects[(flatten ? flatten < 0 : side >= 0) ? 0 : rects.length - 1];
-      if (browser.safari && !flatten && rect.width == 0)
-          rect = Array.prototype.find.call(rects, r => r.width) || rect;
-      return flatten ? flattenRect(rect, flatten < 0) : rect || null;
   }
-  // Also used for collapsed ranges that don't have a placeholder widget!
-  class WidgetView extends ContentView {
-      constructor(widget, length, side) {
-          super();
-          this.widget = widget;
-          this.length = length;
-          this.side = side;
-          this.prevWidget = null;
-      }
-      static create(widget, length, side) {
-          return new (widget.customView || WidgetView)(widget, length, side);
-      }
-      split(from) {
-          let result = WidgetView.create(this.widget, this.length - from, this.side);
-          this.length -= from;
-          return result;
+  const editorAttributes = /*@__PURE__*/Facet.define();
+  const contentAttributes = /*@__PURE__*/Facet.define();
+  // Provide decorations
+  const decorations = /*@__PURE__*/Facet.define();
+  const atomicRanges = /*@__PURE__*/Facet.define();
+  const scrollMargins = /*@__PURE__*/Facet.define();
+  function getScrollMargins(view) {
+      let left = 0, right = 0, top = 0, bottom = 0;
+      for (let source of view.state.facet(scrollMargins)) {
+          let m = source(view);
+          if (m) {
+              if (m.left != null)
+                  left = Math.max(left, m.left);
+              if (m.right != null)
+                  right = Math.max(right, m.right);
+              if (m.top != null)
+                  top = Math.max(top, m.top);
+              if (m.bottom != null)
+                  bottom = Math.max(bottom, m.bottom);
+          }
+      }
+      return { left, right, top, bottom };
+  }
+  const styleModule = /*@__PURE__*/Facet.define();
+  class ChangedRange {
+      constructor(fromA, toA, fromB, toB) {
+          this.fromA = fromA;
+          this.toA = toA;
+          this.fromB = fromB;
+          this.toB = toB;
       }
-      sync() {
-          if (!this.dom || !this.widget.updateDOM(this.dom)) {
-              if (this.dom && this.prevWidget)
-                  this.prevWidget.destroy(this.dom);
-              this.prevWidget = null;
-              this.setDOM(this.widget.toDOM(this.editorView));
-              this.dom.contentEditable = "false";
-          }
+      join(other) {
+          return new ChangedRange(Math.min(this.fromA, other.fromA), Math.max(this.toA, other.toA), Math.min(this.fromB, other.fromB), Math.max(this.toB, other.toB));
       }
-      getSide() { return this.side; }
-      merge(from, to, source, hasStart, openStart, openEnd) {
-          if (source && (!(source instanceof WidgetView) || !this.widget.compare(source.widget) ||
-              from > 0 && openStart <= 0 || to < this.length && openEnd <= 0))
-              return false;
-          this.length = from + (source ? source.length : 0) + (this.length - to);
-          return true;
-      }
-      become(other) {
-          if (other.length == this.length && other instanceof WidgetView && other.side == this.side) {
-              if (this.widget.constructor == other.widget.constructor) {
-                  if (!this.widget.eq(other.widget))
-                      this.markDirty(true);
-                  if (this.dom && !this.prevWidget)
-                      this.prevWidget = this.widget;
-                  this.widget = other.widget;
-                  return true;
-              }
-          }
-          return false;
-      }
-      ignoreMutation() { return true; }
-      ignoreEvent(event) { return this.widget.ignoreEvent(event); }
-      get overrideDOMText() {
-          if (this.length == 0)
-              return Text$1.empty;
-          let top = this;
-          while (top.parent)
-              top = top.parent;
-          let view = top.editorView, text = view && view.state.doc, start = this.posAtStart;
-          return text ? text.slice(start, start + this.length) : Text$1.empty;
-      }
-      domAtPos(pos) {
-          return pos == 0 ? DOMPos.before(this.dom) : DOMPos.after(this.dom, pos == this.length);
-      }
-      domBoundsAround() { return null; }
-      coordsAt(pos, side) {
-          let rects = this.dom.getClientRects(), rect = null;
-          if (!rects.length)
-              return Rect0;
-          for (let i = pos > 0 ? rects.length - 1 : 0;; i += (pos > 0 ? -1 : 1)) {
-              rect = rects[i];
-              if (pos > 0 ? i == 0 : i == rects.length - 1 || rect.top < rect.bottom)
+      addToSet(set) {
+          let i = set.length, me = this;
+          for (; i > 0; i--) {
+              let range = set[i - 1];
+              if (range.fromA > me.toA)
+                  continue;
+              if (range.toA < me.fromA)
                   break;
+              me = me.join(range);
+              set.splice(i - 1, 1);
           }
-          return this.length ? rect : flattenRect(rect, this.side > 0);
-      }
-      get isEditable() { return false; }
-      destroy() {
-          super.destroy();
-          if (this.dom)
-              this.widget.destroy(this.dom);
-      }
-  }
-  class CompositionView extends WidgetView {
-      domAtPos(pos) {
-          let { topView, text } = this.widget;
-          if (!topView)
-              return new DOMPos(text, Math.min(pos, text.nodeValue.length));
-          return scanCompositionTree(pos, 0, topView, text, (v, p) => v.domAtPos(p), p => new DOMPos(text, Math.min(p, text.nodeValue.length)));
-      }
-      sync() { this.setDOM(this.widget.toDOM()); }
-      localPosFromDOM(node, offset) {
-          let { topView, text } = this.widget;
-          if (!topView)
-              return Math.min(offset, this.length);
-          return posFromDOMInCompositionTree(node, offset, topView, text);
-      }
-      ignoreMutation() { return false; }
-      get overrideDOMText() { return null; }
-      coordsAt(pos, side) {
-          let { topView, text } = this.widget;
-          if (!topView)
-              return textCoords(text, pos, side);
-          return scanCompositionTree(pos, side, topView, text, (v, pos, side) => v.coordsAt(pos, side), (pos, side) => textCoords(text, pos, side));
-      }
-      destroy() {
-          var _a;
-          super.destroy();
-          (_a = this.widget.topView) === null || _a === void 0 ? void 0 : _a.destroy();
-      }
-      get isEditable() { return true; }
-      canReuseDOM() { return true; }
-  }
-  // Uses the old structure of a chunk of content view frozen for
-  // composition to try and find a reasonable DOM location for the given
-  // offset.
-  function scanCompositionTree(pos, side, view, text, enterView, fromText) {
-      if (view instanceof MarkView) {
-          for (let child = view.dom.firstChild; child; child = child.nextSibling) {
-              let desc = ContentView.get(child);
-              if (!desc)
-                  return fromText(pos, side);
-              let hasComp = contains(child, text);
-              let len = desc.length + (hasComp ? text.nodeValue.length : 0);
-              if (pos < len || pos == len && desc.getSide() <= 0)
-                  return hasComp ? scanCompositionTree(pos, side, desc, text, enterView, fromText) : enterView(desc, pos, side);
-              pos -= len;
-          }
-          return enterView(view, view.length, -1);
-      }
-      else if (view.dom == text) {
-          return fromText(pos, side);
-      }
-      else {
-          return enterView(view, pos, side);
-      }
-  }
-  function posFromDOMInCompositionTree(node, offset, view, text) {
-      if (view instanceof MarkView) {
-          for (let child of view.children) {
-              let pos = 0, hasComp = contains(child.dom, text);
-              if (contains(child.dom, node))
-                  return pos + (hasComp ? posFromDOMInCompositionTree(node, offset, child, text) : child.localPosFromDOM(node, offset));
-              pos += hasComp ? text.nodeValue.length : child.length;
-          }
-      }
-      else if (view.dom == text) {
-          return Math.min(offset, text.nodeValue.length);
-      }
-      return view.localPosFromDOM(node, offset);
-  }
-  // These are drawn around uneditable widgets to avoid a number of
-  // browser bugs that show up when the cursor is directly next to
-  // uneditable inline content.
-  class WidgetBufferView extends ContentView {
-      constructor(side) {
-          super();
-          this.side = side;
-      }
-      get length() { return 0; }
-      merge() { return false; }
-      become(other) {
-          return other instanceof WidgetBufferView && other.side == this.side;
-      }
-      split() { return new WidgetBufferView(this.side); }
-      sync() {
-          if (!this.dom) {
-              let dom = document.createElement("img");
-              dom.className = "cm-widgetBuffer";
-              dom.setAttribute("aria-hidden", "true");
-              this.setDOM(dom);
-          }
-      }
-      getSide() { return this.side; }
-      domAtPos(pos) { return DOMPos.before(this.dom); }
-      localPosFromDOM() { return 0; }
-      domBoundsAround() { return null; }
-      coordsAt(pos) {
-          let imgRect = this.dom.getBoundingClientRect();
-          // Since the <img> height doesn't correspond to text height, try
-          // to borrow the height from some sibling node.
-          let siblingRect = inlineSiblingRect(this, this.side > 0 ? -1 : 1);
-          return siblingRect && siblingRect.top < imgRect.bottom && siblingRect.bottom > imgRect.top
-              ? { left: imgRect.left, right: imgRect.right, top: siblingRect.top, bottom: siblingRect.bottom } : imgRect;
-      }
-      get overrideDOMText() {
-          return Text$1.empty;
-      }
-  }
-  TextView.prototype.children = WidgetView.prototype.children = WidgetBufferView.prototype.children = noChildren;
-  function inlineSiblingRect(view, side) {
-      let parent = view.parent, index = parent ? parent.children.indexOf(view) : -1;
-      while (parent && index >= 0) {
-          if (side < 0 ? index > 0 : index < parent.children.length) {
-              let next = parent.children[index + side];
-              if (next instanceof TextView) {
-                  let nextRect = next.coordsAt(side < 0 ? next.length : 0, side);
-                  if (nextRect)
-                      return nextRect;
-              }
-              index += side;
-          }
-          else if (parent instanceof MarkView && parent.parent) {
-              index = parent.parent.children.indexOf(parent) + (side < 0 ? 0 : 1);
-              parent = parent.parent;
-          }
-          else {
-              let last = parent.dom.lastChild;
-              if (last && last.nodeName == "BR")
-                  return last.getClientRects()[0];
-              break;
-          }
-      }
-      return undefined;
-  }
-  function inlineDOMAtPos(parent, pos) {
-      let dom = parent.dom, { children } = parent, i = 0;
-      for (let off = 0; i < children.length; i++) {
-          let child = children[i], end = off + child.length;
-          if (end == off && child.getSide() <= 0)
-              continue;
-          if (pos > off && pos < end && child.dom.parentNode == dom)
-              return child.domAtPos(pos - off);
-          if (pos <= off)
-              break;
-          off = end;
-      }
-      for (let j = i; j > 0; j--) {
-          let prev = children[j - 1];
-          if (prev.dom.parentNode == dom)
-              return prev.domAtPos(prev.length);
-      }
-      for (let j = i; j < children.length; j++) {
-          let next = children[j];
-          if (next.dom.parentNode == dom)
-              return next.domAtPos(0);
-      }
-      return new DOMPos(dom, 0);
-  }
-  // Assumes `view`, if a mark view, has precisely 1 child.
-  function joinInlineInto(parent, view, open) {
-      let last, { children } = parent;
-      if (open > 0 && view instanceof MarkView && children.length &&
-          (last = children[children.length - 1]) instanceof MarkView && last.mark.eq(view.mark)) {
-          joinInlineInto(last, view.children[0], open - 1);
-      }
-      else {
-          children.push(view);
-          view.setParent(parent);
+          set.splice(i, 0, me);
+          return set;
       }
-      parent.length += view.length;
-  }
-  function coordsInChildren(view, pos, side) {
-      let before = null, beforePos = -1, after = null, afterPos = -1;
-      function scan(view, pos) {
-          for (let i = 0, off = 0; i < view.children.length && off <= pos; i++) {
-              let child = view.children[i], end = off + child.length;
-              if (end >= pos) {
-                  if (child.children.length) {
-                      scan(child, pos - off);
-                  }
-                  else if (!after && (end > pos || off == end && child.getSide() > 0)) {
-                      after = child;
-                      afterPos = pos - off;
-                  }
-                  else if (off < pos || (off == end && child.getSide() < 0)) {
-                      before = child;
-                      beforePos = pos - off;
-                  }
+      static extendWithRanges(diff, ranges) {
+          if (ranges.length == 0)
+              return diff;
+          let result = [];
+          for (let dI = 0, rI = 0, posA = 0, posB = 0;; dI++) {
+              let next = dI == diff.length ? null : diff[dI], off = posA - posB;
+              let end = next ? next.fromB : 1e9;
+              while (rI < ranges.length && ranges[rI] < end) {
+                  let from = ranges[rI], to = ranges[rI + 1];
+                  let fromB = Math.max(posB, from), toB = Math.min(end, to);
+                  if (fromB <= toB)
+                      new ChangedRange(fromB + off, toB + off, fromB, toB).addToSet(result);
+                  if (to > end)
+                      break;
+                  else
+                      rI += 2;
               }
-              off = end;
+              if (!next)
+                  return result;
+              new ChangedRange(next.fromA, next.toA, next.fromB, next.toB).addToSet(result);
+              posA = next.toA;
+              posB = next.toB;
           }
       }
-      scan(view, pos);
-      let target = (side < 0 ? before : after) || before || after;
-      if (target)
-          return target.coordsAt(Math.max(0, target == before ? beforePos : afterPos), side);
-      return fallbackRect(view);
-  }
-  function fallbackRect(view) {
-      let last = view.dom.lastChild;
-      if (!last)
-          return view.dom.getBoundingClientRect();
-      let rects = clientRectsFor(last);
-      return rects[rects.length - 1] || null;
-  }
-
-  function combineAttrs(source, target) {
-      for (let name in source) {
-          if (name == "class" && target.class)
-              target.class += " " + source.class;
-          else if (name == "style" && target.style)
-              target.style += ";" + source.style;
-          else
-              target[name] = source[name];
-      }
-      return target;
-  }
-  function attrsEq(a, b) {
-      if (a == b)
-          return true;
-      if (!a || !b)
-          return false;
-      let keysA = Object.keys(a), keysB = Object.keys(b);
-      if (keysA.length != keysB.length)
-          return false;
-      for (let key of keysA) {
-          if (keysB.indexOf(key) == -1 || a[key] !== b[key])
-              return false;
-      }
-      return true;
-  }
-  function updateAttrs(dom, prev, attrs) {
-      let changed = null;
-      if (prev)
-          for (let name in prev)
-              if (!(attrs && name in attrs))
-                  dom.removeAttribute(changed = name);
-      if (attrs)
-          for (let name in attrs)
-              if (!(prev && prev[name] == attrs[name]))
-                  dom.setAttribute(changed = name, attrs[name]);
-      return !!changed;
   }
-
   /**
-  Widgets added to the content are described by subclasses of this
-  class. Using a description object like that makes it possible to
-  delay creating of the DOM structure for a widget until it is
-  needed, and to avoid redrawing widgets even if the decorations
-  that define them are recreated.
+  View [plugins](https://codemirror.net/6/docs/ref/#view.ViewPlugin) are given instances of this
+  class, which describe what happened, whenever the view is updated.
   */
-  class WidgetType {
+  class ViewUpdate {
+      constructor(
       /**
-      Compare this instance to another instance of the same type.
-      (TypeScript can't express this, but only instances of the same
-      specific class will be passed to this method.) This is used to
-      avoid redrawing widgets when they are replaced by a new
-      decoration of the same type. The default implementation just
-      returns `false`, which will cause new instances of the widget to
-      always be redrawn.
+      The editor view that the update is associated with.
       */
-      eq(widget) { return false; }
+      view, 
       /**
-      Update a DOM element created by a widget of the same type (but
-      different, non-`eq` content) to reflect this widget. May return
-      true to indicate that it could update, false to indicate it
-      couldn't (in which case the widget will be redrawn). The default
-      implementation just returns false.
+      The new editor state.
       */
-      updateDOM(dom) { return false; }
+      state, 
       /**
-      @internal
+      The transactions involved in the update. May be empty.
       */
-      compare(other) {
-          return this == other || this.constructor == other.constructor && this.eq(other);
+      transactions) {
+          this.view = view;
+          this.state = state;
+          this.transactions = transactions;
+          /**
+          @internal
+          */
+          this.flags = 0;
+          this.startState = view.state;
+          this.changes = ChangeSet.empty(this.startState.doc.length);
+          for (let tr of transactions)
+              this.changes = this.changes.compose(tr.changes);
+          let changedRanges = [];
+          this.changes.iterChangedRanges((fromA, toA, fromB, toB) => changedRanges.push(new ChangedRange(fromA, toA, fromB, toB)));
+          this.changedRanges = changedRanges;
       }
       /**
-      The estimated height this widget will have, to be used when
-      estimating the height of content that hasn't been drawn. May
-      return -1 to indicate you don't know. The default implementation
-      returns -1.
-      */
-      get estimatedHeight() { return -1; }
-      /**
-      Can be used to configure which kinds of events inside the widget
-      should be ignored by the editor. The default is to ignore all
-      events.
-      */
-      ignoreEvent(event) { return true; }
-      /**
       @internal
       */
-      get customView() { return null; }
+      static create(view, state, transactions) {
+          return new ViewUpdate(view, state, transactions);
+      }
       /**
-      This is called when the an instance of the widget is removed
-      from the editor view.
+      Tells you whether the [viewport](https://codemirror.net/6/docs/ref/#view.EditorView.viewport) or
+      [visible ranges](https://codemirror.net/6/docs/ref/#view.EditorView.visibleRanges) changed in this
+      update.
       */
-      destroy(dom) { }
-  }
-  /**
-  The different types of blocks that can occur in an editor view.
-  */
-  var BlockType = /*@__PURE__*/(function (BlockType) {
+      get viewportChanged() {
+          return (this.flags & 4 /* Viewport */) > 0;
+      }
       /**
-      A line of text.
+      Indicates whether the height of a block element in the editor
+      changed in this update.
       */
-      BlockType[BlockType["Text"] = 0] = "Text";
+      get heightChanged() {
+          return (this.flags & 2 /* Height */) > 0;
+      }
       /**
-      A block widget associated with the position after it.
+      Returns true when the document was modified or the size of the
+      editor, or elements within the editor, changed.
       */
-      BlockType[BlockType["WidgetBefore"] = 1] = "WidgetBefore";
+      get geometryChanged() {
+          return this.docChanged || (this.flags & (8 /* Geometry */ | 2 /* Height */)) > 0;
+      }
       /**
-      A block widget associated with the position before it.
+      True when this update indicates a focus change.
       */
-      BlockType[BlockType["WidgetAfter"] = 2] = "WidgetAfter";
+      get focusChanged() {
+          return (this.flags & 1 /* Focus */) > 0;
+      }
       /**
-      A block widget [replacing](https://codemirror.net/6/docs/ref/#view.Decoration^replace) a range of content.
+      Whether the document changed in this update.
       */
-      BlockType[BlockType["WidgetRange"] = 3] = "WidgetRange";
-  return BlockType})(BlockType || (BlockType = {}));
-  /**
-  A decoration provides information on how to draw or style a piece
-  of content. You'll usually use it wrapped in a
-  [`Range`](https://codemirror.net/6/docs/ref/#state.Range), which adds a start and end position.
-  @nonabstract
-  */
-  class Decoration extends RangeValue {
-      constructor(
+      get docChanged() {
+          return !this.changes.empty;
+      }
       /**
-      @internal
+      Whether the selection was explicitly set in this update.
       */
-      startSide, 
+      get selectionSet() {
+          return this.transactions.some(tr => tr.selection);
+      }
       /**
       @internal
       */
-      endSide, 
+      get empty() { return this.flags == 0 && this.transactions.length == 0; }
+  }
+
+  /**
+  Used to indicate [text direction](https://codemirror.net/6/docs/ref/#view.EditorView.textDirection).
+  */
+  var Direction = /*@__PURE__*/(function (Direction) {
+      // (These are chosen to match the base levels, in bidi algorithm
+      // terms, of spans in that direction.)
       /**
-      @internal
+      Left-to-right.
       */
-      widget, 
+      Direction[Direction["LTR"] = 0] = "LTR";
       /**
-      The config object used to create this decoration. You can
-      include additional properties in there to store metadata about
-      your decoration.
+      Right-to-left.
       */
-      spec) {
-          super();
-          this.startSide = startSide;
-          this.endSide = endSide;
-          this.widget = widget;
-          this.spec = spec;
-      }
+      Direction[Direction["RTL"] = 1] = "RTL";
+  return Direction})(Direction || (Direction = {}));
+  const LTR = Direction.LTR, RTL = Direction.RTL;
+  // Decode a string with each type encoded as log2(type)
+  function dec(str) {
+      let result = [];
+      for (let i = 0; i < str.length; i++)
+          result.push(1 << +str[i]);
+      return result;
+  }
+  // Character types for codepoints 0 to 0xf8
+  const LowTypes = /*@__PURE__*/dec("88888888888888888888888888888888888666888888787833333333337888888000000000000000000000000008888880000000000000000000000000088888888888888888888888888888888888887866668888088888663380888308888800000000000000000000000800000000000000000000000000000008");
+  // Character types for codepoints 0x600 to 0x6f9
+  const ArabicTypes = /*@__PURE__*/dec("4444448826627288999999999992222222222222222222222222222222222222222222222229999999999999999999994444444444644222822222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222999999949999999229989999223333333333");
+  const Brackets = /*@__PURE__*/Object.create(null), BracketStack = [];
+  // There's a lot more in
+  // https://www.unicode.org/Public/UCD/latest/ucd/BidiBrackets.txt,
+  // which are left out to keep code size down.
+  for (let p of ["()", "[]", "{}"]) {
+      let l = /*@__PURE__*/p.charCodeAt(0), r = /*@__PURE__*/p.charCodeAt(1);
+      Brackets[l] = r;
+      Brackets[r] = -l;
+  }
+  function charType(ch) {
+      return ch <= 0xf7 ? LowTypes[ch] :
+          0x590 <= ch && ch <= 0x5f4 ? 2 /* R */ :
+              0x600 <= ch && ch <= 0x6f9 ? ArabicTypes[ch - 0x600] :
+                  0x6ee <= ch && ch <= 0x8ac ? 4 /* AL */ :
+                      0x2000 <= ch && ch <= 0x200b ? 256 /* NI */ :
+                          0xfb50 <= ch && ch <= 0xfdff ? 4 /* AL */ :
+                              ch == 0x200c ? 256 /* NI */ : 1 /* L */;
+  }
+  const BidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac\ufb50-\ufdff]/;
+  /**
+  Represents a contiguous range of text that has a single direction
+  (as in left-to-right or right-to-left).
+  */
+  class BidiSpan {
       /**
       @internal
       */
-      get heightRelevant() { return false; }
+      constructor(
       /**
-      Create a mark decoration, which influences the styling of the
-      content in its range. Nested mark decorations will cause nested
-      DOM elements to be created. Nesting order is determined by
-      precedence of the [facet](https://codemirror.net/6/docs/ref/#view.EditorView^decorations), with
-      the higher-precedence decorations creating the inner DOM nodes.
-      Such elements are split on line boundaries and on the boundaries
-      of lower-precedence decorations.
+      The start of the span (relative to the start of the line).
       */
-      static mark(spec) {
-          return new MarkDecoration(spec);
-      }
+      from, 
       /**
-      Create a widget decoration, which displays a DOM element at the
-      given position.
+      The end of the span.
       */
-      static widget(spec) {
-          let side = spec.side || 0, block = !!spec.block;
-          side += block ? (side > 0 ? 300000000 /* Side.BlockAfter */ : -400000000 /* Side.BlockBefore */) : (side > 0 ? 100000000 /* Side.InlineAfter */ : -100000000 /* Side.InlineBefore */);
-          return new PointDecoration(spec, side, side, block, spec.widget || null, false);
-      }
+      to, 
       /**
-      Create a replace decoration which replaces the given range with
-      a widget, or simply hides it.
+      The ["bidi
+      level"](https://unicode.org/reports/tr9/#Basic_Display_Algorithm)
+      of the span (in this context, 0 means
+      left-to-right, 1 means right-to-left, 2 means left-to-right
+      number inside right-to-left text).
       */
-      static replace(spec) {
-          let block = !!spec.block, startSide, endSide;
-          if (spec.isBlockGap) {
-              startSide = -500000000 /* Side.GapStart */;
-              endSide = 400000000 /* Side.GapEnd */;
-          }
-          else {
-              let { start, end } = getInclusive(spec, block);
-              startSide = (start ? (block ? -300000000 /* Side.BlockIncStart */ : -1 /* Side.InlineIncStart */) : 500000000 /* Side.NonIncStart */) - 1;
-              endSide = (end ? (block ? 200000000 /* Side.BlockIncEnd */ : 1 /* Side.InlineIncEnd */) : -600000000 /* Side.NonIncEnd */) + 1;
-          }
-          return new PointDecoration(spec, startSide, endSide, block, spec.widget || null, true);
+      level) {
+          this.from = from;
+          this.to = to;
+          this.level = level;
       }
       /**
-      Create a line decoration, which can add DOM attributes to the
-      line starting at the given position.
+      The direction of this span.
       */
-      static line(spec) {
-          return new LineDecoration(spec);
-      }
+      get dir() { return this.level % 2 ? RTL : LTR; }
       /**
-      Build a [`DecorationSet`](https://codemirror.net/6/docs/ref/#view.DecorationSet) from the given
-      decorated range or ranges. If the ranges aren't already sorted,
-      pass `true` for `sort` to make the library sort them for you.
+      @internal
       */
-      static set(of, sort = false) {
-          return RangeSet.of(of, sort);
-      }
+      side(end, dir) { return (this.dir == dir) == end ? this.to : this.from; }
       /**
       @internal
       */
-      hasHeight() { return this.widget ? this.widget.estimatedHeight > -1 : false; }
+      static find(order, index, level, assoc) {
+          let maybe = -1;
+          for (let i = 0; i < order.length; i++) {
+              let span = order[i];
+              if (span.from <= index && span.to >= index) {
+                  if (span.level == level)
+                      return i;
+                  // When multiple spans match, if assoc != 0, take the one that
+                  // covers that side, otherwise take the one with the minimum
+                  // level.
+                  if (maybe < 0 || (assoc != 0 ? (assoc < 0 ? span.from < index : span.to > index) : order[maybe].level > span.level))
+                      maybe = i;
+              }
+          }
+          if (maybe < 0)
+              throw new RangeError("Index out of range");
+          return maybe;
+      }
   }
-  /**
-  The empty set of decorations.
-  */
-  Decoration.none = RangeSet.empty;
-  class MarkDecoration extends Decoration {
-      constructor(spec) {
-          let { start, end } = getInclusive(spec);
-          super(start ? -1 /* Side.InlineIncStart */ : 500000000 /* Side.NonIncStart */, end ? 1 /* Side.InlineIncEnd */ : -600000000 /* Side.NonIncEnd */, null, spec);
-          this.tagName = spec.tagName || "span";
-          this.class = spec.class || "";
-          this.attrs = spec.attributes || null;
-      }
-      eq(other) {
-          return this == other ||
-              other instanceof MarkDecoration &&
-                  this.tagName == other.tagName &&
-                  this.class == other.class &&
-                  attrsEq(this.attrs, other.attrs);
-      }
-      range(from, to = from) {
-          if (from >= to)
-              throw new RangeError("Mark decorations may not be empty");
-          return super.range(from, to);
-      }
-  }
-  MarkDecoration.prototype.point = false;
-  class LineDecoration extends Decoration {
-      constructor(spec) {
-          super(-200000000 /* Side.Line */, -200000000 /* Side.Line */, null, spec);
-      }
-      eq(other) {
-          return other instanceof LineDecoration && attrsEq(this.spec.attributes, other.spec.attributes);
+  // Reused array of character types
+  const types = [];
+  function computeOrder(line, direction) {
+      let len = line.length, outerType = direction == LTR ? 1 /* L */ : 2 /* R */, oppositeType = direction == LTR ? 2 /* R */ : 1 /* L */;
+      if (!line || outerType == 1 /* L */ && !BidiRE.test(line))
+          return trivialOrder(len);
+      // W1. Examine each non-spacing mark (NSM) in the level run, and
+      // change the type of the NSM to the type of the previous
+      // character. If the NSM is at the start of the level run, it will
+      // get the type of sor.
+      // W2. Search backwards from each instance of a European number
+      // until the first strong type (R, L, AL, or sor) is found. If an
+      // AL is found, change the type of the European number to Arabic
+      // number.
+      // W3. Change all ALs to R.
+      // (Left after this: L, R, EN, AN, ET, CS, NI)
+      for (let i = 0, prev = outerType, prevStrong = outerType; i < len; i++) {
+          let type = charType(line.charCodeAt(i));
+          if (type == 512 /* NSM */)
+              type = prev;
+          else if (type == 8 /* EN */ && prevStrong == 4 /* AL */)
+              type = 16 /* AN */;
+          types[i] = type == 4 /* AL */ ? 2 /* R */ : type;
+          if (type & 7 /* Strong */)
+              prevStrong = type;
+          prev = type;
       }
-      range(from, to = from) {
-          if (to != from)
-              throw new RangeError("Line decoration ranges must be zero-length");
-          return super.range(from, to);
+      // W5. A sequence of European terminators adjacent to European
+      // numbers changes to all European numbers.
+      // W6. Otherwise, separators and terminators change to Other
+      // Neutral.
+      // W7. Search backwards from each instance of a European number
+      // until the first strong type (R, L, or sor) is found. If an L is
+      // found, then change the type of the European number to L.
+      // (Left after this: L, R, EN+AN, NI)
+      for (let i = 0, prev = outerType, prevStrong = outerType; i < len; i++) {
+          let type = types[i];
+          if (type == 128 /* CS */) {
+              if (i < len - 1 && prev == types[i + 1] && (prev & 24 /* Num */))
+                  type = types[i] = prev;
+              else
+                  types[i] = 256 /* NI */;
+          }
+          else if (type == 64 /* ET */) {
+              let end = i + 1;
+              while (end < len && types[end] == 64 /* ET */)
+                  end++;
+              let replace = (i && prev == 8 /* EN */) || (end < len && types[end] == 8 /* EN */) ? (prevStrong == 1 /* L */ ? 1 /* L */ : 8 /* EN */) : 256 /* NI */;
+              for (let j = i; j < end; j++)
+                  types[j] = replace;
+              i = end - 1;
+          }
+          else if (type == 8 /* EN */ && prevStrong == 1 /* L */) {
+              types[i] = 1 /* L */;
+          }
+          prev = type;
+          if (type & 7 /* Strong */)
+              prevStrong = type;
       }
-  }
-  LineDecoration.prototype.mapMode = MapMode.TrackBefore;
-  LineDecoration.prototype.point = true;
-  class PointDecoration extends Decoration {
-      constructor(spec, startSide, endSide, block, widget, isReplace) {
-          super(startSide, endSide, widget, spec);
-          this.block = block;
-          this.isReplace = isReplace;
-          this.mapMode = !block ? MapMode.TrackDel : startSide <= 0 ? MapMode.TrackBefore : MapMode.TrackAfter;
+      // N0. Process bracket pairs in an isolating run sequence
+      // sequentially in the logical order of the text positions of the
+      // opening paired brackets using the logic given below. Within this
+      // scope, bidirectional types EN and AN are treated as R.
+      for (let i = 0, sI = 0, context = 0, ch, br, type; i < len; i++) {
+          // Keeps [startIndex, type, strongSeen] triples for each open
+          // bracket on BracketStack.
+          if (br = Brackets[ch = line.charCodeAt(i)]) {
+              if (br < 0) { // Closing bracket
+                  for (let sJ = sI - 3; sJ >= 0; sJ -= 3) {
+                      if (BracketStack[sJ + 1] == -br) {
+                          let flags = BracketStack[sJ + 2];
+                          let type = (flags & 2 /* EmbedInside */) ? outerType :
+                              !(flags & 4 /* OppositeInside */) ? 0 :
+                                  (flags & 1 /* OppositeBefore */) ? oppositeType : outerType;
+                          if (type)
+                              types[i] = types[BracketStack[sJ]] = type;
+                          sI = sJ;
+                          break;
+                      }
+                  }
+              }
+              else if (BracketStack.length == 189 /* MaxDepth */) {
+                  break;
+              }
+              else {
+                  BracketStack[sI++] = i;
+                  BracketStack[sI++] = ch;
+                  BracketStack[sI++] = context;
+              }
+          }
+          else if ((type = types[i]) == 2 /* R */ || type == 1 /* L */) {
+              let embed = type == outerType;
+              context = embed ? 0 : 1 /* OppositeBefore */;
+              for (let sJ = sI - 3; sJ >= 0; sJ -= 3) {
+                  let cur = BracketStack[sJ + 2];
+                  if (cur & 2 /* EmbedInside */)
+                      break;
+                  if (embed) {
+                      BracketStack[sJ + 2] |= 2 /* EmbedInside */;
+                  }
+                  else {
+                      if (cur & 4 /* OppositeInside */)
+                          break;
+                      BracketStack[sJ + 2] |= 4 /* OppositeInside */;
+                  }
+              }
+          }
       }
-      // Only relevant when this.block == true
-      get type() {
-          return this.startSide < this.endSide ? BlockType.WidgetRange
-              : this.startSide <= 0 ? BlockType.WidgetBefore : BlockType.WidgetAfter;
+      // N1. A sequence of neutrals takes the direction of the
+      // surrounding strong text if the text on both sides has the same
+      // direction. European and Arabic numbers act as if they were R in
+      // terms of their influence on neutrals. Start-of-level-run (sor)
+      // and end-of-level-run (eor) are used at level run boundaries.
+      // N2. Any remaining neutrals take the embedding direction.
+      // (Left after this: L, R, EN+AN)
+      for (let i = 0; i < len; i++) {
+          if (types[i] == 256 /* NI */) {
+              let end = i + 1;
+              while (end < len && types[end] == 256 /* NI */)
+                  end++;
+              let beforeL = (i ? types[i - 1] : outerType) == 1 /* L */;
+              let afterL = (end < len ? types[end] : outerType) == 1 /* L */;
+              let replace = beforeL == afterL ? (beforeL ? 1 /* L */ : 2 /* R */) : outerType;
+              for (let j = i; j < end; j++)
+                  types[j] = replace;
+              i = end - 1;
+          }
       }
-      get heightRelevant() { return this.block || !!this.widget && this.widget.estimatedHeight >= 5; }
-      eq(other) {
-          return other instanceof PointDecoration &&
-              widgetsEq(this.widget, other.widget) &&
-              this.block == other.block &&
-              this.startSide == other.startSide && this.endSide == other.endSide;
+      // Here we depart from the documented algorithm, in order to avoid
+      // building up an actual levels array. Since there are only three
+      // levels (0, 1, 2) in an implementation that doesn't take
+      // explicit embedding into account, we can build up the order on
+      // the fly, without following the level-based algorithm.
+      let order = [];
+      if (outerType == 1 /* L */) {
+          for (let i = 0; i < len;) {
+              let start = i, rtl = types[i++] != 1 /* L */;
+              while (i < len && rtl == (types[i] != 1 /* L */))
+                  i++;
+              if (rtl) {
+                  for (let j = i; j > start;) {
+                      let end = j, l = types[--j] != 2 /* R */;
+                      while (j > start && l == (types[j - 1] != 2 /* R */))
+                          j--;
+                      order.push(new BidiSpan(j, end, l ? 2 : 1));
+                  }
+              }
+              else {
+                  order.push(new BidiSpan(start, i, 0));
+              }
+          }
       }
-      range(from, to = from) {
-          if (this.isReplace && (from > to || (from == to && this.startSide > 0 && this.endSide <= 0)))
-              throw new RangeError("Invalid range for replacement decoration");
-          if (!this.isReplace && to != from)
-              throw new RangeError("Widget decorations can only have zero-length ranges");
-          return super.range(from, to);
+      else {
+          for (let i = 0; i < len;) {
+              let start = i, rtl = types[i++] == 2 /* R */;
+              while (i < len && rtl == (types[i] == 2 /* R */))
+                  i++;
+              order.push(new BidiSpan(start, i, rtl ? 1 : 2));
+          }
       }
+      return order;
   }
-  PointDecoration.prototype.point = true;
-  function getInclusive(spec, block = false) {
-      let { inclusiveStart: start, inclusiveEnd: end } = spec;
-      if (start == null)
-          start = spec.inclusive;
-      if (end == null)
-          end = spec.inclusive;
-      return { start: start !== null && start !== void 0 ? start : block, end: end !== null && end !== void 0 ? end : block };
-  }
-  function widgetsEq(a, b) {
-      return a == b || !!(a && b && a.compare(b));
-  }
-  function addRange(from, to, ranges, margin = 0) {
-      let last = ranges.length - 1;
-      if (last >= 0 && ranges[last] + margin >= from)
-          ranges[last] = Math.max(ranges[last], to);
-      else
-          ranges.push(from, to);
+  function trivialOrder(length) {
+      return [new BidiSpan(0, length, 0)];
   }
-
-  class LineView extends ContentView {
-      constructor() {
-          super(...arguments);
-          this.children = [];
-          this.length = 0;
-          this.prevAttrs = undefined;
-          this.attrs = null;
-          this.breakAfter = 0;
-      }
-      // Consumes source
-      merge(from, to, source, hasStart, openStart, openEnd) {
-          if (source) {
-              if (!(source instanceof LineView))
-                  return false;
-              if (!this.dom)
-                  source.transferDOM(this); // Reuse source.dom when appropriate
+  let movedOver = "";
+  function moveVisually(line, order, dir, start, forward) {
+      var _a;
+      let startIndex = start.head - line.from, spanI = -1;
+      if (startIndex == 0) {
+          if (!forward || !line.length)
+              return null;
+          if (order[0].level != dir) {
+              startIndex = order[0].side(false, dir);
+              spanI = 0;
           }
-          if (hasStart)
-              this.setDeco(source ? source.attrs : null);
-          mergeChildrenInto(this, from, to, source ? source.children : [], openStart, openEnd);
-          return true;
       }
-      split(at) {
-          let end = new LineView;
-          end.breakAfter = this.breakAfter;
-          if (this.length == 0)
-              return end;
-          let { i, off } = this.childPos(at);
-          if (off) {
-              end.append(this.children[i].split(off), 0);
-              this.children[i].merge(off, this.children[i].length, null, false, 0, 0);
-              i++;
+      else if (startIndex == line.length) {
+          if (forward)
+              return null;
+          let last = order[order.length - 1];
+          if (last.level != dir) {
+              startIndex = last.side(true, dir);
+              spanI = order.length - 1;
           }
-          for (let j = i; j < this.children.length; j++)
-              end.append(this.children[j], 0);
-          while (i > 0 && this.children[i - 1].length == 0)
-              this.children[--i].destroy();
-          this.children.length = i;
-          this.markDirty();
-          this.length = at;
-          return end;
       }
-      transferDOM(other) {
-          if (!this.dom)
-              return;
-          this.markDirty();
-          other.setDOM(this.dom);
-          other.prevAttrs = this.prevAttrs === undefined ? this.attrs : this.prevAttrs;
-          this.prevAttrs = undefined;
-          this.dom = null;
+      if (spanI < 0)
+          spanI = BidiSpan.find(order, startIndex, (_a = start.bidiLevel) !== null && _a !== void 0 ? _a : -1, start.assoc);
+      let span = order[spanI];
+      // End of span. (But not end of line--that was checked for above.)
+      if (startIndex == span.side(forward, dir)) {
+          span = order[spanI += forward ? 1 : -1];
+          startIndex = span.side(!forward, dir);
       }
-      setDeco(attrs) {
-          if (!attrsEq(this.attrs, attrs)) {
-              if (this.dom) {
-                  this.prevAttrs = this.attrs;
-                  this.markDirty();
-              }
-              this.attrs = attrs;
-          }
+      let indexForward = forward == (span.dir == dir);
+      let nextIndex = findClusterBreak(line.text, startIndex, indexForward);
+      movedOver = line.text.slice(Math.min(startIndex, nextIndex), Math.max(startIndex, nextIndex));
+      if (nextIndex != span.side(forward, dir))
+          return EditorSelection.cursor(nextIndex + line.from, indexForward ? -1 : 1, span.level);
+      let nextSpan = spanI == (forward ? order.length - 1 : 0) ? null : order[spanI + (forward ? 1 : -1)];
+      if (!nextSpan && span.level != dir)
+          return EditorSelection.cursor(forward ? line.to : line.from, forward ? -1 : 1, dir);
+      if (nextSpan && nextSpan.level < span.level)
+          return EditorSelection.cursor(nextSpan.side(!forward, dir) + line.from, forward ? 1 : -1, nextSpan.level);
+      return EditorSelection.cursor(nextIndex + line.from, forward ? -1 : 1, span.level);
+  }
+
+  const LineBreakPlaceholder = "\uffff";
+  class DOMReader {
+      constructor(points, state) {
+          this.points = points;
+          this.text = "";
+          this.lineSeparator = state.facet(EditorState.lineSeparator);
       }
-      append(child, openStart) {
-          joinInlineInto(this, child, openStart);
+      append(text) {
+          this.text += text;
       }
-      // Only called when building a line view in ContentBuilder
-      addLineDeco(deco) {
-          let attrs = deco.spec.attributes, cls = deco.spec.class;
-          if (attrs)
-              this.attrs = combineAttrs(attrs, this.attrs || {});
-          if (cls)
-              this.attrs = combineAttrs({ class: cls }, this.attrs || {});
+      lineBreak() {
+          this.text += LineBreakPlaceholder;
       }
-      domAtPos(pos) {
-          return inlineDOMAtPos(this, pos);
+      readRange(start, end) {
+          if (!start)
+              return this;
+          let parent = start.parentNode;
+          for (let cur = start;;) {
+              this.findPointBefore(parent, cur);
+              let oldLen = this.text.length;
+              this.readNode(cur);
+              let next = cur.nextSibling;
+              if (next == end)
+                  break;
+              let view = ContentView.get(cur), nextView = ContentView.get(next);
+              if (view && nextView ? view.breakAfter :
+                  (view ? view.breakAfter : isBlockElement(cur)) ||
+                      (isBlockElement(next) && (cur.nodeName != "BR" || cur.cmIgnore) && this.text.length > oldLen))
+                  this.lineBreak();
+              cur = next;
+          }
+          this.findPointBefore(parent, end);
+          return this;
       }
-      reuseDOM(node) {
-          if (node.nodeName == "DIV") {
-              this.setDOM(node);
-              this.dirty |= 4 /* Dirty.Attrs */ | 2 /* Dirty.Node */;
+      readTextNode(node) {
+          let text = node.nodeValue;
+          for (let point of this.points)
+              if (point.node == node)
+                  point.pos = this.text.length + Math.min(point.offset, text.length);
+          for (let off = 0, re = this.lineSeparator ? null : /\r\n?|\n/g;;) {
+              let nextBreak = -1, breakSize = 1, m;
+              if (this.lineSeparator) {
+                  nextBreak = text.indexOf(this.lineSeparator, off);
+                  breakSize = this.lineSeparator.length;
+              }
+              else if (m = re.exec(text)) {
+                  nextBreak = m.index;
+                  breakSize = m[0].length;
+              }
+              this.append(text.slice(off, nextBreak < 0 ? text.length : nextBreak));
+              if (nextBreak < 0)
+                  break;
+              this.lineBreak();
+              if (breakSize > 1)
+                  for (let point of this.points)
+                      if (point.node == node && point.pos > this.text.length)
+                          point.pos -= breakSize - 1;
+              off = nextBreak + breakSize;
           }
       }
-      sync(track) {
-          var _a;
-          if (!this.dom) {
-              this.setDOM(document.createElement("div"));
-              this.dom.className = "cm-line";
-              this.prevAttrs = this.attrs ? null : undefined;
+      readNode(node) {
+          if (node.cmIgnore)
+              return;
+          let view = ContentView.get(node);
+          let fromView = view && view.overrideDOMText;
+          if (fromView != null) {
+              this.findPointInside(node, fromView.length);
+              for (let i = fromView.iter(); !i.next().done;) {
+                  if (i.lineBreak)
+                      this.lineBreak();
+                  else
+                      this.append(i.value);
+              }
           }
-          else if (this.dirty & 4 /* Dirty.Attrs */) {
-              clearAttributes(this.dom);
-              this.dom.className = "cm-line";
-              this.prevAttrs = this.attrs ? null : undefined;
+          else if (node.nodeType == 3) {
+              this.readTextNode(node);
           }
-          if (this.prevAttrs !== undefined) {
-              updateAttrs(this.dom, this.prevAttrs, this.attrs);
-              this.dom.classList.add("cm-line");
-              this.prevAttrs = undefined;
+          else if (node.nodeName == "BR") {
+              if (node.nextSibling)
+                  this.lineBreak();
           }
-          super.sync(track);
-          let last = this.dom.lastChild;
-          while (last && ContentView.get(last) instanceof MarkView)
-              last = last.lastChild;
-          if (!last || !this.length ||
-              last.nodeName != "BR" && ((_a = ContentView.get(last)) === null || _a === void 0 ? void 0 : _a.isEditable) == false &&
-                  (!browser.ios || !this.children.some(ch => ch instanceof TextView))) {
-              let hack = document.createElement("BR");
-              hack.cmIgnore = true;
-              this.dom.appendChild(hack);
+          else if (node.nodeType == 1) {
+              this.readRange(node.firstChild, null);
           }
       }
-      measureTextSize() {
-          if (this.children.length == 0 || this.length > 20)
-              return null;
-          let totalWidth = 0;
-          for (let child of this.children) {
-              if (!(child instanceof TextView) || /[^ -~]/.test(child.text))
-                  return null;
-              let rects = clientRectsFor(child.dom);
-              if (rects.length != 1)
-                  return null;
-              totalWidth += rects[0].width;
-          }
-          return !totalWidth ? null : {
-              lineHeight: this.dom.getBoundingClientRect().height,
-              charWidth: totalWidth / this.length
-          };
+      findPointBefore(node, next) {
+          for (let point of this.points)
+              if (point.node == node && node.childNodes[point.offset] == next)
+                  point.pos = this.text.length;
       }
-      coordsAt(pos, side) {
-          return coordsInChildren(this, pos, side);
+      findPointInside(node, maxLen) {
+          for (let point of this.points)
+              if (node.nodeType == 3 ? point.node == node : node.contains(point.node))
+                  point.pos = this.text.length + Math.min(maxLen, point.offset);
       }
-      become(_other) { return false; }
-      get type() { return BlockType.Text; }
-      static find(docView, pos) {
-          for (let i = 0, off = 0; i < docView.children.length; i++) {
-              let block = docView.children[i], end = off + block.length;
-              if (end >= pos) {
-                  if (block instanceof LineView)
-                      return block;
-                  if (end > pos)
-                      break;
-              }
-              off = end + block.breakAfter;
-          }
-          return null;
+  }
+  function isBlockElement(node) {
+      return node.nodeType == 1 && /^(DIV|P|LI|UL|OL|BLOCKQUOTE|DD|DT|H\d|SECTION|PRE)$/.test(node.nodeName);
+  }
+  class DOMPoint {
+      constructor(node, offset) {
+          this.node = node;
+          this.offset = offset;
+          this.pos = -1;
       }
   }
-  class BlockWidgetView extends ContentView {
-      constructor(widget, length, type) {
+
+  class DocView extends ContentView {
+      constructor(view) {
           super();
-          this.widget = widget;
-          this.length = length;
-          this.type = type;
-          this.breakAfter = 0;
-          this.prevWidget = null;
-      }
-      merge(from, to, source, _takeDeco, openStart, openEnd) {
-          if (source && (!(source instanceof BlockWidgetView) || !this.widget.compare(source.widget) ||
-              from > 0 && openStart <= 0 || to < this.length && openEnd <= 0))
-              return false;
-          this.length = from + (source ? source.length : 0) + (this.length - to);
-          return true;
-      }
-      domAtPos(pos) {
-          return pos == 0 ? DOMPos.before(this.dom) : DOMPos.after(this.dom, pos == this.length);
-      }
-      split(at) {
-          let len = this.length - at;
-          this.length = at;
-          let end = new BlockWidgetView(this.widget, len, this.type);
-          end.breakAfter = this.breakAfter;
-          return end;
+          this.view = view;
+          this.compositionDeco = Decoration.none;
+          this.decorations = [];
+          this.dynamicDecorationMap = [];
+          // Track a minimum width for the editor. When measuring sizes in
+          // measureVisibleLineHeights, this is updated to point at the width
+          // of a given element and its extent in the document. When a change
+          // happens in that range, these are reset. That way, once we've seen
+          // a line/element of a given length, we keep the editor wide enough
+          // to fit at least that element, until it is changed, at which point
+          // we forget it again.
+          this.minWidth = 0;
+          this.minWidthFrom = 0;
+          this.minWidthTo = 0;
+          // Track whether the DOM selection was set in a lossy way, so that
+          // we don't mess it up when reading it back it
+          this.impreciseAnchor = null;
+          this.impreciseHead = null;
+          this.forceSelection = false;
+          // Used by the resize observer to ignore resizes that we caused
+          // ourselves
+          this.lastUpdate = Date.now();
+          this.setDOM(view.contentDOM);
+          this.children = [new LineView];
+          this.children[0].setParent(this);
+          this.updateDeco();
+          this.updateInner([new ChangedRange(0, 0, 0, view.state.doc.length)], 0);
       }
-      get children() { return noChildren; }
-      sync() {
-          if (!this.dom || !this.widget.updateDOM(this.dom)) {
-              if (this.dom && this.prevWidget)
-                  this.prevWidget.destroy(this.dom);
-              this.prevWidget = null;
-              this.setDOM(this.widget.toDOM(this.editorView));
-              this.dom.contentEditable = "false";
+      get length() { return this.view.state.doc.length; }
+      // Update the document view to a given state.
+      update(update) {
+          let changedRanges = update.changedRanges;
+          if (this.minWidth > 0 && changedRanges.length) {
+              if (!changedRanges.every(({ fromA, toA }) => toA < this.minWidthFrom || fromA > this.minWidthTo)) {
+                  this.minWidth = this.minWidthFrom = this.minWidthTo = 0;
+              }
+              else {
+                  this.minWidthFrom = update.changes.mapPos(this.minWidthFrom, 1);
+                  this.minWidthTo = update.changes.mapPos(this.minWidthTo, 1);
+              }
           }
-      }
-      get overrideDOMText() {
-          return this.parent ? this.parent.view.state.doc.slice(this.posAtStart, this.posAtEnd) : Text$1.empty;
-      }
-      domBoundsAround() { return null; }
-      become(other) {
-          if (other instanceof BlockWidgetView && other.type == this.type &&
-              other.widget.constructor == this.widget.constructor) {
-              if (!other.widget.eq(this.widget))
-                  this.markDirty(true);
-              if (this.dom && !this.prevWidget)
-                  this.prevWidget = this.widget;
-              this.widget = other.widget;
-              this.length = other.length;
-              this.breakAfter = other.breakAfter;
+          if (this.view.inputState.composing < 0)
+              this.compositionDeco = Decoration.none;
+          else if (update.transactions.length || this.dirty)
+              this.compositionDeco = computeCompositionDeco(this.view, update.changes);
+          // When the DOM nodes around the selection are moved to another
+          // parent, Chrome sometimes reports a different selection through
+          // getSelection than the one that it actually shows to the user.
+          // This forces a selection update when lines are joined to work
+          // around that. Issue #54
+          if ((browser.ie || browser.chrome) && !this.compositionDeco.size && update &&
+              update.state.doc.lines != update.startState.doc.lines)
+              this.forceSelection = true;
+          let prevDeco = this.decorations, deco = this.updateDeco();
+          let decoDiff = findChangedDeco(prevDeco, deco, update.changes);
+          changedRanges = ChangedRange.extendWithRanges(changedRanges, decoDiff);
+          if (this.dirty == 0 /* Not */ && changedRanges.length == 0) {
+              return false;
+          }
+          else {
+              this.updateInner(changedRanges, update.startState.doc.length);
+              if (update.transactions.length)
+                  this.lastUpdate = Date.now();
               return true;
           }
-          return false;
-      }
-      ignoreMutation() { return true; }
-      ignoreEvent(event) { return this.widget.ignoreEvent(event); }
-      destroy() {
-          super.destroy();
-          if (this.dom)
-              this.widget.destroy(this.dom);
-      }
-  }
-
-  class ContentBuilder {
-      constructor(doc, pos, end, disallowBlockEffectsFor) {
-          this.doc = doc;
-          this.pos = pos;
-          this.end = end;
-          this.disallowBlockEffectsFor = disallowBlockEffectsFor;
-          this.content = [];
-          this.curLine = null;
-          this.breakAtStart = 0;
-          this.pendingBuffer = 0 /* Buf.No */;
-          this.bufferMarks = [];
-          // Set to false directly after a widget that covers the position after it
-          this.atCursorPos = true;
-          this.openStart = -1;
-          this.openEnd = -1;
-          this.text = "";
-          this.textOff = 0;
-          this.cursor = doc.iter();
-          this.skip = pos;
       }
-      posCovered() {
-          if (this.content.length == 0)
-              return !this.breakAtStart && this.doc.lineAt(this.pos).from != this.pos;
-          let last = this.content[this.content.length - 1];
-          return !last.breakAfter && !(last instanceof BlockWidgetView && last.type == BlockType.WidgetBefore);
+      // Used by update and the constructor do perform the actual DOM
+      // update
+      updateInner(changes, oldLength) {
+          this.view.viewState.mustMeasureContent = true;
+          this.updateChildren(changes, oldLength);
+          let { observer } = this.view;
+          observer.ignore(() => {
+              // Lock the height during redrawing, since Chrome sometimes
+              // messes with the scroll position during DOM mutation (though
+              // no relayout is triggered and I cannot imagine how it can
+              // recompute the scroll position without a layout)
+              this.dom.style.height = this.view.viewState.contentHeight + "px";
+              this.dom.style.flexBasis = this.minWidth ? this.minWidth + "px" : "";
+              // Chrome will sometimes, when DOM mutations occur directly
+              // around the selection, get confused and report a different
+              // selection from the one it displays (issue #218). This tries
+              // to detect that situation.
+              let track = browser.chrome || browser.ios ? { node: observer.selectionRange.focusNode, written: false } : undefined;
+              this.sync(this.view, track);
+              this.dirty = 0 /* Not */;
+              if (track && (track.written || observer.selectionRange.focusNode != track.node))
+                  this.forceSelection = true;
+              this.dom.style.height = "";
+          });
+          let gaps = [];
+          if (this.view.viewport.from || this.view.viewport.to < this.view.state.doc.length)
+              for (let child of this.children)
+                  if (child instanceof BlockWidgetView && child.widget instanceof BlockGapWidget)
+                      gaps.push(child.dom);
+          observer.updateGaps(gaps);
       }
-      getLine() {
-          if (!this.curLine) {
-              this.content.push(this.curLine = new LineView);
-              this.atCursorPos = true;
+      updateChildren(changes, oldLength) {
+          let cursor = this.childCursor(oldLength);
+          for (let i = changes.length - 1;; i--) {
+              let next = i >= 0 ? changes[i] : null;
+              if (!next)
+                  break;
+              let { fromA, toA, fromB, toB } = next;
+              let { content, breakAtStart, openStart, openEnd } = ContentBuilder.build(this.view.state.doc, fromB, toB, this.decorations, this.dynamicDecorationMap);
+              let { i: toI, off: toOff } = cursor.findPos(toA, 1);
+              let { i: fromI, off: fromOff } = cursor.findPos(fromA, -1);
+              replaceRange(this, fromI, fromOff, toI, toOff, content, breakAtStart, openStart, openEnd);
           }
-          return this.curLine;
       }
-      flushBuffer(active = this.bufferMarks) {
-          if (this.pendingBuffer) {
-              this.curLine.append(wrapMarks(new WidgetBufferView(-1), active), active.length);
-              this.pendingBuffer = 0 /* Buf.No */;
+      // Sync the DOM selection to this.state.selection
+      updateSelection(mustRead = false, fromPointer = false) {
+          if (mustRead || !this.view.observer.selectionRange.focusNode)
+              this.view.observer.readSelectionRange();
+          let activeElt = this.view.root.activeElement, focused = activeElt == this.dom;
+          let selectionNotFocus = !focused &&
+              hasSelection(this.dom, this.view.observer.selectionRange) && !(activeElt && this.dom.contains(activeElt));
+          if (!(focused || fromPointer || selectionNotFocus))
+              return;
+          let force = this.forceSelection;
+          this.forceSelection = false;
+          let main = this.view.state.selection.main;
+          // FIXME need to handle the case where the selection falls inside a block range
+          let anchor = this.domAtPos(main.anchor);
+          let head = main.empty ? anchor : this.domAtPos(main.head);
+          // Always reset on Firefox when next to an uneditable node to
+          // avoid invisible cursor bugs (#111)
+          if (browser.gecko && main.empty && !this.compositionDeco.size && betweenUneditable(anchor)) {
+              let dummy = document.createTextNode("");
+              this.view.observer.ignore(() => anchor.node.insertBefore(dummy, anchor.node.childNodes[anchor.offset] || null));
+              anchor = head = new DOMPos(dummy, 0);
+              force = true;
           }
-      }
-      addBlockWidget(view) {
-          this.flushBuffer();
-          this.curLine = null;
-          this.content.push(view);
-      }
-      finish(openEnd) {
-          if (this.pendingBuffer && openEnd <= this.bufferMarks.length)
-              this.flushBuffer();
-          else
-              this.pendingBuffer = 0 /* Buf.No */;
-          if (!this.posCovered())
-              this.getLine();
-      }
-      buildText(length, active, openStart) {
-          while (length > 0) {
-              if (this.textOff == this.text.length) {
-                  let { value, lineBreak, done } = this.cursor.next(this.skip);
-                  this.skip = 0;
-                  if (done)
-                      throw new Error("Ran out of text content when drawing inline views");
-                  if (lineBreak) {
-                      if (!this.posCovered())
-                          this.getLine();
-                      if (this.content.length)
-                          this.content[this.content.length - 1].breakAfter = 1;
-                      else
-                          this.breakAtStart = 1;
-                      this.flushBuffer();
-                      this.curLine = null;
-                      this.atCursorPos = true;
-                      length--;
-                      continue;
+          let domSel = this.view.observer.selectionRange;
+          // If the selection is already here, or in an equivalent position, don't touch it
+          if (force || !domSel.focusNode ||
+              !isEquivalentPosition(anchor.node, anchor.offset, domSel.anchorNode, domSel.anchorOffset) ||
+              !isEquivalentPosition(head.node, head.offset, domSel.focusNode, domSel.focusOffset)) {
+              this.view.observer.ignore(() => {
+                  // Chrome Android will hide the virtual keyboard when tapping
+                  // inside an uneditable node, and not bring it back when we
+                  // move the cursor to its proper position. This tries to
+                  // restore the keyboard by cycling focus.
+                  if (browser.android && browser.chrome && this.dom.contains(domSel.focusNode) &&
+                      inUneditable(domSel.focusNode, this.dom)) {
+                      this.dom.blur();
+                      this.dom.focus({ preventScroll: true });
+                  }
+                  let rawSel = getSelection(this.view.root);
+                  if (!rawSel) ;
+                  else if (main.empty) {
+                      // Work around https://bugzilla.mozilla.org/show_bug.cgi?id=1612076
+                      if (browser.gecko) {
+                          let nextTo = nextToUneditable(anchor.node, anchor.offset);
+                          if (nextTo && nextTo != (1 /* Before */ | 2 /* After */)) {
+                              let text = nearbyTextNode(anchor.node, anchor.offset, nextTo == 1 /* Before */ ? 1 : -1);
+                              if (text)
+                                  anchor = new DOMPos(text, nextTo == 1 /* Before */ ? 0 : text.nodeValue.length);
+                          }
+                      }
+                      rawSel.collapse(anchor.node, anchor.offset);
+                      if (main.bidiLevel != null && domSel.cursorBidiLevel != null)
+                          domSel.cursorBidiLevel = main.bidiLevel;
+                  }
+                  else if (rawSel.extend) {
+                      // Selection.extend can be used to create an 'inverted' selection
+                      // (one where the focus is before the anchor), but not all
+                      // browsers support it yet.
+                      rawSel.collapse(anchor.node, anchor.offset);
+                      // Safari will ignore the call above when the editor is
+                      // hidden, and then raise an error on the call to extend
+                      // (#940).
+                      try {
+                          rawSel.extend(head.node, head.offset);
+                      }
+                      catch (_) { }
                   }
                   else {
-                      this.text = value;
-                      this.textOff = 0;
+                      // Primitive (IE) way
+                      let range = document.createRange();
+                      if (main.anchor > main.head)
+                          [anchor, head] = [head, anchor];
+                      range.setEnd(head.node, head.offset);
+                      range.setStart(anchor.node, anchor.offset);
+                      rawSel.removeAllRanges();
+                      rawSel.addRange(range);
                   }
-              }
-              let take = Math.min(this.text.length - this.textOff, length, 512 /* T.Chunk */);
-              this.flushBuffer(active.slice(active.length - openStart));
-              this.getLine().append(wrapMarks(new TextView(this.text.slice(this.textOff, this.textOff + take)), active), openStart);
-              this.atCursorPos = true;
-              this.textOff += take;
-              length -= take;
-              openStart = 0;
+                  if (selectionNotFocus && this.view.root.activeElement == this.dom) {
+                      this.dom.blur();
+                      if (activeElt)
+                          activeElt.focus();
+                  }
+              });
+              this.view.observer.setSelectionRange(anchor, head);
           }
+          this.impreciseAnchor = anchor.precise ? null : new DOMPos(domSel.anchorNode, domSel.anchorOffset);
+          this.impreciseHead = head.precise ? null : new DOMPos(domSel.focusNode, domSel.focusOffset);
       }
-      span(from, to, active, openStart) {
-          this.buildText(to - from, active, openStart);
-          this.pos = to;
-          if (this.openStart < 0)
-              this.openStart = openStart;
+      enforceCursorAssoc() {
+          if (this.compositionDeco.size)
+              return;
+          let { view } = this, cursor = view.state.selection.main;
+          let sel = getSelection(view.root);
+          let { anchorNode, anchorOffset } = view.observer.selectionRange;
+          if (!sel || !cursor.empty || !cursor.assoc || !sel.modify)
+              return;
+          let line = LineView.find(this, cursor.head);
+          if (!line)
+              return;
+          let lineStart = line.posAtStart;
+          if (cursor.head == lineStart || cursor.head == lineStart + line.length)
+              return;
+          let before = this.coordsAt(cursor.head, -1), after = this.coordsAt(cursor.head, 1);
+          if (!before || !after || before.bottom > after.top)
+              return;
+          let dom = this.domAtPos(cursor.head + cursor.assoc);
+          sel.collapse(dom.node, dom.offset);
+          sel.modify("move", cursor.assoc < 0 ? "forward" : "backward", "lineboundary");
+          // This can go wrong in corner cases like single-character lines,
+          // so check and reset if necessary.
+          view.observer.readSelectionRange();
+          let newRange = view.observer.selectionRange;
+          if (view.docView.posFromDOM(newRange.anchorNode, newRange.anchorOffset) != cursor.from)
+              sel.collapse(anchorNode, anchorOffset);
       }
-      point(from, to, deco, active, openStart, index) {
-          if (this.disallowBlockEffectsFor[index] && deco instanceof PointDecoration) {
-              if (deco.block)
-                  throw new RangeError("Block decorations may not be specified via plugins");
-              if (to > this.doc.lineAt(this.pos).to)
-                  throw new RangeError("Decorations that replace line breaks may not be specified via plugins");
+      nearest(dom) {
+          for (let cur = dom; cur;) {
+              let domView = ContentView.get(cur);
+              if (domView && domView.rootView == this)
+                  return domView;
+              cur = cur.parentNode;
           }
-          let len = to - from;
-          if (deco instanceof PointDecoration) {
-              if (deco.block) {
-                  let { type } = deco;
-                  if (type == BlockType.WidgetAfter && !this.posCovered())
-                      this.getLine();
-                  this.addBlockWidget(new BlockWidgetView(deco.widget || new NullWidget("div"), len, type));
-              }
-              else {
-                  let view = WidgetView.create(deco.widget || new NullWidget("span"), len, len ? 0 : deco.startSide);
-                  let cursorBefore = this.atCursorPos && !view.isEditable && openStart <= active.length && (from < to || deco.startSide > 0);
-                  let cursorAfter = !view.isEditable && (from < to || openStart > active.length || deco.startSide <= 0);
-                  let line = this.getLine();
-                  if (this.pendingBuffer == 2 /* Buf.IfCursor */ && !cursorBefore)
-                      this.pendingBuffer = 0 /* Buf.No */;
-                  this.flushBuffer(active);
-                  if (cursorBefore) {
-                      line.append(wrapMarks(new WidgetBufferView(1), active), openStart);
-                      openStart = active.length + Math.max(0, openStart - active.length);
+          return null;
+      }
+      posFromDOM(node, offset) {
+          let view = this.nearest(node);
+          if (!view)
+              throw new RangeError("Trying to find position for a DOM position outside of the document");
+          return view.localPosFromDOM(node, offset) + view.posAtStart;
+      }
+      domAtPos(pos) {
+          let { i, off } = this.childCursor().findPos(pos, -1);
+          for (; i < this.children.length - 1;) {
+              let child = this.children[i];
+              if (off < child.length || child instanceof LineView)
+                  break;
+              i++;
+              off = 0;
+          }
+          return this.children[i].domAtPos(off);
+      }
+      coordsAt(pos, side) {
+          for (let off = this.length, i = this.children.length - 1;; i--) {
+              let child = this.children[i], start = off - child.breakAfter - child.length;
+              if (pos > start ||
+                  (pos == start && child.type != BlockType.WidgetBefore && child.type != BlockType.WidgetAfter &&
+                      (!i || side == 2 || this.children[i - 1].breakAfter ||
+                          (this.children[i - 1].type == BlockType.WidgetBefore && side > -2))))
+                  return child.coordsAt(pos - start, side);
+              off = start;
+          }
+      }
+      measureVisibleLineHeights(viewport) {
+          let result = [], { from, to } = viewport;
+          let contentWidth = this.view.contentDOM.clientWidth;
+          let isWider = contentWidth > Math.max(this.view.scrollDOM.clientWidth, this.minWidth) + 1;
+          let widest = -1, ltr = this.view.textDirection == Direction.LTR;
+          for (let pos = 0, i = 0; i < this.children.length; i++) {
+              let child = this.children[i], end = pos + child.length;
+              if (end > to)
+                  break;
+              if (pos >= from) {
+                  let childRect = child.dom.getBoundingClientRect();
+                  result.push(childRect.height);
+                  if (isWider) {
+                      let last = child.dom.lastChild;
+                      let rects = last ? clientRectsFor(last) : [];
+                      if (rects.length) {
+                          let rect = rects[rects.length - 1];
+                          let width = ltr ? rect.right - childRect.left : childRect.right - rect.left;
+                          if (width > widest) {
+                              widest = width;
+                              this.minWidth = contentWidth;
+                              this.minWidthFrom = pos;
+                              this.minWidthTo = end;
+                          }
+                      }
                   }
-                  line.append(wrapMarks(view, active), openStart);
-                  this.atCursorPos = cursorAfter;
-                  this.pendingBuffer = !cursorAfter ? 0 /* Buf.No */ : from < to || openStart > active.length ? 1 /* Buf.Yes */ : 2 /* Buf.IfCursor */;
-                  if (this.pendingBuffer)
-                      this.bufferMarks = active.slice();
               }
+              pos = end + child.breakAfter;
           }
-          else if (this.doc.lineAt(this.pos).from == this.pos) { // Line decoration
-              this.getLine().addLineDeco(deco);
-          }
-          if (len) {
-              // Advance the iterator past the replaced content
-              if (this.textOff + len <= this.text.length) {
-                  this.textOff += len;
+          return result;
+      }
+      textDirectionAt(pos) {
+          let { i } = this.childPos(pos, 1);
+          return getComputedStyle(this.children[i].dom).direction == "rtl" ? Direction.RTL : Direction.LTR;
+      }
+      measureTextSize() {
+          for (let child of this.children) {
+              if (child instanceof LineView) {
+                  let measure = child.measureTextSize();
+                  if (measure)
+                      return measure;
               }
-              else {
-                  this.skip += len - (this.text.length - this.textOff);
-                  this.text = "";
-                  this.textOff = 0;
+          }
+          // If no workable line exists, force a layout of a measurable element
+          let dummy = document.createElement("div"), lineHeight, charWidth, textHeight;
+          dummy.className = "cm-line";
+          dummy.style.width = "99999px";
+          dummy.textContent = "abc def ghi jkl mno pqr stu";
+          this.view.observer.ignore(() => {
+              this.dom.appendChild(dummy);
+              let rect = clientRectsFor(dummy.firstChild)[0];
+              lineHeight = dummy.getBoundingClientRect().height;
+              charWidth = rect ? rect.width / 27 : 7;
+              textHeight = rect ? rect.height : lineHeight;
+              dummy.remove();
+          });
+          return { lineHeight, charWidth, textHeight };
+      }
+      childCursor(pos = this.length) {
+          // Move back to start of last element when possible, so that
+          // `ChildCursor.findPos` doesn't have to deal with the edge case
+          // of being after the last element.
+          let i = this.children.length;
+          if (i)
+              pos -= this.children[--i].length;
+          return new ChildCursor(this.children, pos, i);
+      }
+      computeBlockGapDeco() {
+          let deco = [], vs = this.view.viewState;
+          for (let pos = 0, i = 0;; i++) {
+              let next = i == vs.viewports.length ? null : vs.viewports[i];
+              let end = next ? next.from - 1 : this.length;
+              if (end > pos) {
+                  let height = vs.lineBlockAt(end).bottom - vs.lineBlockAt(pos).top;
+                  deco.push(Decoration.replace({
+                      widget: new BlockGapWidget(height),
+                      block: true,
+                      inclusive: true,
+                      isBlockGap: true,
+                  }).range(pos, end));
               }
-              this.pos = to;
+              if (!next)
+                  break;
+              pos = next.to + 1;
           }
-          if (this.openStart < 0)
-              this.openStart = openStart;
+          return Decoration.set(deco);
       }
-      static build(text, from, to, decorations, dynamicDecorationMap) {
-          let builder = new ContentBuilder(text, from, to, dynamicDecorationMap);
-          builder.openEnd = RangeSet.spans(decorations, from, to, builder);
-          if (builder.openStart < 0)
-              builder.openStart = builder.openEnd;
-          builder.finish(builder.openEnd);
-          return builder;
+      updateDeco() {
+          let allDeco = this.view.state.facet(decorations).map((d, i) => {
+              let dynamic = this.dynamicDecorationMap[i] = typeof d == "function";
+              return dynamic ? d(this.view) : d;
+          });
+          for (let i = allDeco.length; i < allDeco.length + 3; i++)
+              this.dynamicDecorationMap[i] = false;
+          return this.decorations = [
+              ...allDeco,
+              this.compositionDeco,
+              this.computeBlockGapDeco(),
+              this.view.viewState.lineGapDeco
+          ];
+      }
+      scrollIntoView(target) {
+          let { range } = target;
+          let rect = this.coordsAt(range.head, range.empty ? range.assoc : range.head > range.anchor ? -1 : 1), other;
+          if (!rect)
+              return;
+          if (!range.empty && (other = this.coordsAt(range.anchor, range.anchor > range.head ? -1 : 1)))
+              rect = { left: Math.min(rect.left, other.left), top: Math.min(rect.top, other.top),
+                  right: Math.max(rect.right, other.right), bottom: Math.max(rect.bottom, other.bottom) };
+          let margins = getScrollMargins(this.view);
+          let targetRect = {
+              left: rect.left - margins.left, top: rect.top - margins.top,
+              right: rect.right + margins.right, bottom: rect.bottom + margins.bottom
+          };
+          scrollRectIntoView(this.view.scrollDOM, targetRect, range.head < range.anchor ? -1 : 1, target.x, target.y, target.xMargin, target.yMargin, this.view.textDirection == Direction.LTR);
       }
   }
-  function wrapMarks(view, active) {
-      for (let mark of active)
-          view = new MarkView(mark, [view], view.length);
-      return view;
+  function betweenUneditable(pos) {
+      return pos.node.nodeType == 1 && pos.node.firstChild &&
+          (pos.offset == 0 || pos.node.childNodes[pos.offset - 1].contentEditable == "false") &&
+          (pos.offset == pos.node.childNodes.length || pos.node.childNodes[pos.offset].contentEditable == "false");
   }
-  class NullWidget extends WidgetType {
-      constructor(tag) {
+  class BlockGapWidget extends WidgetType {
+      constructor(height) {
           super();
-          this.tag = tag;
+          this.height = height;
       }
-      eq(other) { return other.tag == this.tag; }
-      toDOM() { return document.createElement(this.tag); }
-      updateDOM(elt) { return elt.nodeName.toLowerCase() == this.tag; }
-  }
-
-  const clickAddsSelectionRange = /*@__PURE__*/Facet.define();
-  const dragMovesSelection$1 = /*@__PURE__*/Facet.define();
-  const mouseSelectionStyle = /*@__PURE__*/Facet.define();
-  const exceptionSink = /*@__PURE__*/Facet.define();
-  const updateListener = /*@__PURE__*/Facet.define();
-  const inputHandler = /*@__PURE__*/Facet.define();
-  const perLineTextDirection = /*@__PURE__*/Facet.define({
-      combine: values => values.some(x => x)
-  });
-  const nativeSelectionHidden = /*@__PURE__*/Facet.define({
-      combine: values => values.some(x => x)
-  });
-  class ScrollTarget {
-      constructor(range, y = "nearest", x = "nearest", yMargin = 5, xMargin = 5) {
-          this.range = range;
-          this.y = y;
-          this.x = x;
-          this.yMargin = yMargin;
-          this.xMargin = xMargin;
+      toDOM() {
+          let elt = document.createElement("div");
+          this.updateDOM(elt);
+          return elt;
       }
-      map(changes) {
-          return changes.empty ? this : new ScrollTarget(this.range.map(changes), this.y, this.x, this.yMargin, this.xMargin);
+      eq(other) { return other.height == this.height; }
+      updateDOM(elt) {
+          elt.style.height = this.height + "px";
+          return true;
       }
+      get estimatedHeight() { return this.height; }
   }
-  const scrollIntoView = /*@__PURE__*/StateEffect.define({ map: (t, ch) => t.map(ch) });
-  /**
-  Log or report an unhandled exception in client code. Should
-  probably only be used by extension code that allows client code to
-  provide functions, and calls those functions in a context where an
-  exception can't be propagated to calling code in a reasonable way
-  (for example when in an event handler).
-
-  Either calls a handler registered with
-  [`EditorView.exceptionSink`](https://codemirror.net/6/docs/ref/#view.EditorView^exceptionSink),
-  `window.onerror`, if defined, or `console.error` (in which case
-  it'll pass `context`, when given, as first argument).
-  */
-  function logException(state, exception, context) {
-      let handler = state.facet(exceptionSink);
-      if (handler.length)
-          handler[0](exception);
-      else if (window.onerror)
-          window.onerror(String(exception), context, undefined, undefined, exception);
-      else if (context)
-          console.error(context + ":", exception);
-      else
-          console.error(exception);
-  }
-  const editable = /*@__PURE__*/Facet.define({ combine: values => values.length ? values[0] : true });
-  let nextPluginID = 0;
-  const viewPlugin = /*@__PURE__*/Facet.define();
-  /**
-  View plugins associate stateful values with a view. They can
-  influence the way the content is drawn, and are notified of things
-  that happen in the view.
-  */
-  class ViewPlugin {
-      constructor(
-      /**
-      @internal
-      */
-      id, 
-      /**
-      @internal
-      */
-      create, 
-      /**
-      @internal
-      */
-      domEventHandlers, buildExtensions) {
-          this.id = id;
-          this.create = create;
-          this.domEventHandlers = domEventHandlers;
-          this.extension = buildExtensions(this);
+  function compositionSurroundingNode(view) {
+      let sel = view.observer.selectionRange;
+      let textNode = sel.focusNode && nearbyTextNode(sel.focusNode, sel.focusOffset, 0);
+      if (!textNode)
+          return null;
+      let cView = view.docView.nearest(textNode);
+      if (!cView)
+          return null;
+      if (cView instanceof LineView) {
+          let topNode = textNode;
+          while (topNode.parentNode != cView.dom)
+              topNode = topNode.parentNode;
+          let prev = topNode.previousSibling;
+          while (prev && !ContentView.get(prev))
+              prev = prev.previousSibling;
+          let pos = prev ? ContentView.get(prev).posAtEnd : cView.posAtStart;
+          return { from: pos, to: pos, node: topNode, text: textNode };
       }
-      /**
-      Define a plugin from a constructor function that creates the
-      plugin's value, given an editor view.
-      */
-      static define(create, spec) {
-          const { eventHandlers, provide, decorations: deco } = spec || {};
-          return new ViewPlugin(nextPluginID++, create, eventHandlers, plugin => {
-              let ext = [viewPlugin.of(plugin)];
-              if (deco)
-                  ext.push(decorations.of(view => {
-                      let pluginInst = view.plugin(plugin);
-                      return pluginInst ? deco(pluginInst) : Decoration.none;
-                  }));
-              if (provide)
-                  ext.push(provide(plugin));
-              return ext;
-          });
+      else {
+          for (;;) {
+              let { parent } = cView;
+              if (!parent)
+                  return null;
+              if (parent instanceof LineView)
+                  break;
+              cView = parent;
+          }
+          let from = cView.posAtStart;
+          return { from, to: from + cView.length, node: cView.dom, text: textNode };
       }
-      /**
-      Create a plugin for a class whose constructor takes a single
-      editor view as argument.
-      */
-      static fromClass(cls, spec) {
-          return ViewPlugin.define(view => new cls(view), spec);
+  }
+  function computeCompositionDeco(view, changes) {
+      let surrounding = compositionSurroundingNode(view);
+      if (!surrounding)
+          return Decoration.none;
+      let { from, to, node, text: textNode } = surrounding;
+      let newFrom = changes.mapPos(from, 1), newTo = Math.max(newFrom, changes.mapPos(to, -1));
+      let { state } = view, reader = new DOMReader([], state);
+      if (node.nodeType == 3)
+          reader.readTextNode(node);
+      else
+          reader.readRange(node.firstChild, null);
+      let { text } = reader;
+      if (text.indexOf(LineBreakPlaceholder) > -1)
+          return Decoration.none; // Don't try to preserve multi-line compositions
+      if (newTo - newFrom < text.length) {
+          if (state.doc.sliceString(newFrom, Math.min(state.doc.length, newFrom + text.length)) == text)
+              newTo = newFrom + text.length;
+          else if (state.doc.sliceString(Math.max(0, newTo - text.length), newTo) == text)
+              newFrom = newTo - text.length;
+          else
+              return Decoration.none;
       }
+      else if (state.doc.sliceString(newFrom, newTo) != text) {
+          return Decoration.none;
+      }
+      let topView = ContentView.get(node);
+      if (topView instanceof CompositionView)
+          topView = topView.widget.topView;
+      else if (topView)
+          topView.parent = null;
+      return Decoration.set(Decoration.replace({ widget: new CompositionWidget(node, textNode, topView), inclusive: true })
+          .range(newFrom, newTo));
   }
-  class PluginInstance {
-      constructor(spec) {
-          this.spec = spec;
-          // When starting an update, all plugins have this field set to the
-          // update object, indicating they need to be updated. When finished
-          // updating, it is set to `false`. Retrieving a plugin that needs to
-          // be updated with `view.plugin` forces an eager update.
-          this.mustUpdate = null;
-          // This is null when the plugin is initially created, but
-          // initialized on the first update.
-          this.value = null;
+  class CompositionWidget extends WidgetType {
+      constructor(top, text, topView) {
+          super();
+          this.top = top;
+          this.text = text;
+          this.topView = topView;
       }
-      update(view) {
-          if (!this.value) {
-              if (this.spec) {
-                  try {
-                      this.value = this.spec.create(view);
-                  }
-                  catch (e) {
-                      logException(view.state, e, "CodeMirror plugin crashed");
-                      this.deactivate();
-                  }
+      eq(other) { return this.top == other.top && this.text == other.text; }
+      toDOM() { return this.top; }
+      ignoreEvent() { return false; }
+      get customView() { return CompositionView; }
+  }
+  function nearbyTextNode(startNode, startOffset, side) {
+      if (side <= 0)
+          for (let node = startNode, offset = startOffset;;) {
+              if (node.nodeType == 3)
+                  return node;
+              if (node.nodeType == 1 && offset > 0) {
+                  node = node.childNodes[offset - 1];
+                  offset = maxOffset(node);
               }
-          }
-          else if (this.mustUpdate) {
-              let update = this.mustUpdate;
-              this.mustUpdate = null;
-              if (this.value.update) {
-                  try {
-                      this.value.update(update);
-                  }
-                  catch (e) {
-                      logException(update.state, e, "CodeMirror plugin crashed");
-                      if (this.value.destroy)
-                          try {
-                              this.value.destroy();
-                          }
-                          catch (_) { }
-                      this.deactivate();
-                  }
+              else {
+                  break;
               }
           }
-          return this;
-      }
-      destroy(view) {
-          var _a;
-          if ((_a = this.value) === null || _a === void 0 ? void 0 : _a.destroy) {
-              try {
-                  this.value.destroy();
+      if (side >= 0)
+          for (let node = startNode, offset = startOffset;;) {
+              if (node.nodeType == 3)
+                  return node;
+              if (node.nodeType == 1 && offset < node.childNodes.length && side >= 0) {
+                  node = node.childNodes[offset];
+                  offset = 0;
               }
-              catch (e) {
-                  logException(view.state, e, "CodeMirror plugin crashed");
+              else {
+                  break;
               }
           }
+      return null;
+  }
+  function nextToUneditable(node, offset) {
+      if (node.nodeType != 1)
+          return 0;
+      return (offset && node.childNodes[offset - 1].contentEditable == "false" ? 1 /* Before */ : 0) |
+          (offset < node.childNodes.length && node.childNodes[offset].contentEditable == "false" ? 2 /* After */ : 0);
+  }
+  class DecorationComparator$1 {
+      constructor() {
+          this.changes = [];
       }
-      deactivate() {
-          this.spec = this.value = null;
+      compareRange(from, to) { addRange(from, to, this.changes); }
+      comparePoint(from, to) { addRange(from, to, this.changes); }
+  }
+  function findChangedDeco(a, b, diff) {
+      let comp = new DecorationComparator$1;
+      RangeSet.compare(a, b, diff, comp);
+      return comp.changes;
+  }
+  function inUneditable(node, inside) {
+      for (let cur = node; cur && cur != inside; cur = cur.assignedSlot || cur.parentNode) {
+          if (cur.nodeType == 1 && cur.contentEditable == 'false') {
+              return true;
+          }
       }
+      return false;
   }
-  const editorAttributes = /*@__PURE__*/Facet.define();
-  const contentAttributes = /*@__PURE__*/Facet.define();
-  // Provide decorations
-  const decorations = /*@__PURE__*/Facet.define();
-  const atomicRanges = /*@__PURE__*/Facet.define();
-  const scrollMargins = /*@__PURE__*/Facet.define();
-  const styleModule = /*@__PURE__*/Facet.define();
-  class ChangedRange {
-      constructor(fromA, toA, fromB, toB) {
-          this.fromA = fromA;
-          this.toA = toA;
-          this.fromB = fromB;
-          this.toB = toB;
+
+  function groupAt(state, pos, bias = 1) {
+      let categorize = state.charCategorizer(pos);
+      let line = state.doc.lineAt(pos), linePos = pos - line.from;
+      if (line.length == 0)
+          return EditorSelection.cursor(pos);
+      if (linePos == 0)
+          bias = 1;
+      else if (linePos == line.length)
+          bias = -1;
+      let from = linePos, to = linePos;
+      if (bias < 0)
+          from = findClusterBreak(line.text, linePos, false);
+      else
+          to = findClusterBreak(line.text, linePos);
+      let cat = categorize(line.text.slice(from, to));
+      while (from > 0) {
+          let prev = findClusterBreak(line.text, from, false);
+          if (categorize(line.text.slice(prev, from)) != cat)
+              break;
+          from = prev;
       }
-      join(other) {
-          return new ChangedRange(Math.min(this.fromA, other.fromA), Math.max(this.toA, other.toA), Math.min(this.fromB, other.fromB), Math.max(this.toB, other.toB));
+      while (to < line.length) {
+          let next = findClusterBreak(line.text, to);
+          if (categorize(line.text.slice(to, next)) != cat)
+              break;
+          to = next;
       }
-      addToSet(set) {
-          let i = set.length, me = this;
-          for (; i > 0; i--) {
-              let range = set[i - 1];
-              if (range.fromA > me.toA)
-                  continue;
-              if (range.toA < me.fromA)
-                  break;
-              me = me.join(range);
-              set.splice(i - 1, 1);
+      return EditorSelection.range(from + line.from, to + line.from);
+  }
+  // Search the DOM for the {node, offset} position closest to the given
+  // coordinates. Very inefficient and crude, but can usually be avoided
+  // by calling caret(Position|Range)FromPoint instead.
+  function getdx(x, rect) {
+      return rect.left > x ? rect.left - x : Math.max(0, x - rect.right);
+  }
+  function getdy(y, rect) {
+      return rect.top > y ? rect.top - y : Math.max(0, y - rect.bottom);
+  }
+  function yOverlap(a, b) {
+      return a.top < b.bottom - 1 && a.bottom > b.top + 1;
+  }
+  function upTop(rect, top) {
+      return top < rect.top ? { top, left: rect.left, right: rect.right, bottom: rect.bottom } : rect;
+  }
+  function upBot(rect, bottom) {
+      return bottom > rect.bottom ? { top: rect.top, left: rect.left, right: rect.right, bottom } : rect;
+  }
+  function domPosAtCoords(parent, x, y) {
+      let closest, closestRect, closestX, closestY, closestOverlap = false;
+      let above, below, aboveRect, belowRect;
+      for (let child = parent.firstChild; child; child = child.nextSibling) {
+          let rects = clientRectsFor(child);
+          for (let i = 0; i < rects.length; i++) {
+              let rect = rects[i];
+              if (closestRect && yOverlap(closestRect, rect))
+                  rect = upTop(upBot(rect, closestRect.bottom), closestRect.top);
+              let dx = getdx(x, rect), dy = getdy(y, rect);
+              if (dx == 0 && dy == 0)
+                  return child.nodeType == 3 ? domPosInText(child, x, y) : domPosAtCoords(child, x, y);
+              if (!closest || closestY > dy || closestY == dy && closestX > dx) {
+                  closest = child;
+                  closestRect = rect;
+                  closestX = dx;
+                  closestY = dy;
+                  let side = dy ? (y < rect.top ? -1 : 1) : dx ? (x < rect.left ? -1 : 1) : 0;
+                  closestOverlap = !side || (side > 0 ? i < rects.length - 1 : i > 0);
+              }
+              if (dx == 0) {
+                  if (y > rect.bottom && (!aboveRect || aboveRect.bottom < rect.bottom)) {
+                      above = child;
+                      aboveRect = rect;
+                  }
+                  else if (y < rect.top && (!belowRect || belowRect.top > rect.top)) {
+                      below = child;
+                      belowRect = rect;
+                  }
+              }
+              else if (aboveRect && yOverlap(aboveRect, rect)) {
+                  aboveRect = upBot(aboveRect, rect.bottom);
+              }
+              else if (belowRect && yOverlap(belowRect, rect)) {
+                  belowRect = upTop(belowRect, rect.top);
+              }
           }
-          set.splice(i, 0, me);
-          return set;
       }
-      static extendWithRanges(diff, ranges) {
-          if (ranges.length == 0)
-              return diff;
-          let result = [];
-          for (let dI = 0, rI = 0, posA = 0, posB = 0;; dI++) {
-              let next = dI == diff.length ? null : diff[dI], off = posA - posB;
-              let end = next ? next.fromB : 1e9;
-              while (rI < ranges.length && ranges[rI] < end) {
-                  let from = ranges[rI], to = ranges[rI + 1];
-                  let fromB = Math.max(posB, from), toB = Math.min(end, to);
-                  if (fromB <= toB)
-                      new ChangedRange(fromB + off, toB + off, fromB, toB).addToSet(result);
-                  if (to > end)
-                      break;
-                  else
-                      rI += 2;
+      if (aboveRect && aboveRect.bottom >= y) {
+          closest = above;
+          closestRect = aboveRect;
+      }
+      else if (belowRect && belowRect.top <= y) {
+          closest = below;
+          closestRect = belowRect;
+      }
+      if (!closest)
+          return { node: parent, offset: 0 };
+      let clipX = Math.max(closestRect.left, Math.min(closestRect.right, x));
+      if (closest.nodeType == 3)
+          return domPosInText(closest, clipX, y);
+      if (closestOverlap && closest.contentEditable != "false")
+          return domPosAtCoords(closest, clipX, y);
+      let offset = Array.prototype.indexOf.call(parent.childNodes, closest) +
+          (x >= (closestRect.left + closestRect.right) / 2 ? 1 : 0);
+      return { node: parent, offset };
+  }
+  function domPosInText(node, x, y) {
+      let len = node.nodeValue.length;
+      let closestOffset = -1, closestDY = 1e9, generalSide = 0;
+      for (let i = 0; i < len; i++) {
+          let rects = textRange(node, i, i + 1).getClientRects();
+          for (let j = 0; j < rects.length; j++) {
+              let rect = rects[j];
+              if (rect.top == rect.bottom)
+                  continue;
+              if (!generalSide)
+                  generalSide = x - rect.left;
+              let dy = (rect.top > y ? rect.top - y : y - rect.bottom) - 1;
+              if (rect.left - 1 <= x && rect.right + 1 >= x && dy < closestDY) {
+                  let right = x >= (rect.left + rect.right) / 2, after = right;
+                  if (browser.chrome || browser.gecko) {
+                      // Check for RTL on browsers that support getting client
+                      // rects for empty ranges.
+                      let rectBefore = textRange(node, i).getBoundingClientRect();
+                      if (rectBefore.left == rect.right)
+                          after = !right;
+                  }
+                  if (dy <= 0)
+                      return { node, offset: i + (after ? 1 : 0) };
+                  closestOffset = i + (after ? 1 : 0);
+                  closestDY = dy;
               }
-              if (!next)
-                  return result;
-              new ChangedRange(next.fromA, next.toA, next.fromB, next.toB).addToSet(result);
-              posA = next.toA;
-              posB = next.toB;
           }
       }
+      return { node, offset: closestOffset > -1 ? closestOffset : generalSide > 0 ? node.nodeValue.length : 0 };
   }
-  /**
-  View [plugins](https://codemirror.net/6/docs/ref/#view.ViewPlugin) are given instances of this
-  class, which describe what happened, whenever the view is updated.
-  */
-  class ViewUpdate {
-      constructor(
-      /**
-      The editor view that the update is associated with.
-      */
-      view, 
-      /**
-      The new editor state.
-      */
-      state, 
-      /**
-      The transactions involved in the update. May be empty.
-      */
-      transactions) {
-          this.view = view;
-          this.state = state;
-          this.transactions = transactions;
-          /**
-          @internal
-          */
-          this.flags = 0;
-          this.startState = view.state;
-          this.changes = ChangeSet.empty(this.startState.doc.length);
-          for (let tr of transactions)
-              this.changes = this.changes.compose(tr.changes);
-          let changedRanges = [];
-          this.changes.iterChangedRanges((fromA, toA, fromB, toB) => changedRanges.push(new ChangedRange(fromA, toA, fromB, toB)));
-          this.changedRanges = changedRanges;
-          let focus = view.hasFocus;
-          if (focus != view.inputState.notifiedFocused) {
-              view.inputState.notifiedFocused = focus;
-              this.flags |= 1 /* UpdateFlag.Focus */;
+  function posAtCoords(view, coords, precise, bias = -1) {
+      var _a, _b;
+      let content = view.contentDOM.getBoundingClientRect(), docTop = content.top + view.viewState.paddingTop;
+      let block, { docHeight } = view.viewState;
+      let { x, y } = coords, yOffset = y - docTop;
+      if (yOffset < 0)
+          return 0;
+      if (yOffset > docHeight)
+          return view.state.doc.length;
+      // Scan for a text block near the queried y position
+      for (let halfLine = view.viewState.heightOracle.textHeight / 2, bounced = false;;) {
+          block = view.elementAtHeight(yOffset);
+          if (block.type == BlockType.Text)
+              break;
+          for (;;) {
+              // Move the y position out of this block
+              yOffset = bias > 0 ? block.bottom + halfLine : block.top - halfLine;
+              if (yOffset >= 0 && yOffset <= docHeight)
+                  break;
+              // If the document consists entirely of replaced widgets, we
+              // won't find a text block, so return 0
+              if (bounced)
+                  return precise ? null : 0;
+              bounced = true;
+              bias = -bias;
           }
       }
-      /**
-      @internal
-      */
-      static create(view, state, transactions) {
-          return new ViewUpdate(view, state, transactions);
-      }
-      /**
-      Tells you whether the [viewport](https://codemirror.net/6/docs/ref/#view.EditorView.viewport) or
-      [visible ranges](https://codemirror.net/6/docs/ref/#view.EditorView.visibleRanges) changed in this
-      update.
-      */
-      get viewportChanged() {
-          return (this.flags & 4 /* UpdateFlag.Viewport */) > 0;
+      y = docTop + yOffset;
+      let lineStart = block.from;
+      // If this is outside of the rendered viewport, we can't determine a position
+      if (lineStart < view.viewport.from)
+          return view.viewport.from == 0 ? 0 : precise ? null : posAtCoordsImprecise(view, content, block, x, y);
+      if (lineStart > view.viewport.to)
+          return view.viewport.to == view.state.doc.length ? view.state.doc.length :
+              precise ? null : posAtCoordsImprecise(view, content, block, x, y);
+      // Prefer ShadowRootOrDocument.elementFromPoint if present, fall back to document if not
+      let doc = view.dom.ownerDocument;
+      let root = view.root.elementFromPoint ? view.root : doc;
+      let element = root.elementFromPoint(x, y);
+      if (element && !view.contentDOM.contains(element))
+          element = null;
+      // If the element is unexpected, clip x at the sides of the content area and try again
+      if (!element) {
+          x = Math.max(content.left + 1, Math.min(content.right - 1, x));
+          element = root.elementFromPoint(x, y);
+          if (element && !view.contentDOM.contains(element))
+              element = null;
       }
-      /**
-      Indicates whether the height of a block element in the editor
-      changed in this update.
-      */
-      get heightChanged() {
-          return (this.flags & 2 /* UpdateFlag.Height */) > 0;
+      // There's visible editor content under the point, so we can try
+      // using caret(Position|Range)FromPoint as a shortcut
+      let node, offset = -1;
+      if (element && ((_a = view.docView.nearest(element)) === null || _a === void 0 ? void 0 : _a.isEditable) != false) {
+          if (doc.caretPositionFromPoint) {
+              let pos = doc.caretPositionFromPoint(x, y);
+              if (pos)
+                  ({ offsetNode: node, offset } = pos);
+          }
+          else if (doc.caretRangeFromPoint) {
+              let range = doc.caretRangeFromPoint(x, y);
+              if (range) {
+                  ({ startContainer: node, startOffset: offset } = range);
+                  if (!view.contentDOM.contains(node) ||
+                      browser.safari && isSuspiciousSafariCaretResult(node, offset, x) ||
+                      browser.chrome && isSuspiciousChromeCaretResult(node, offset, x))
+                      node = undefined;
+              }
+          }
       }
-      /**
-      Returns true when the document was modified or the size of the
-      editor, or elements within the editor, changed.
-      */
-      get geometryChanged() {
-          return this.docChanged || (this.flags & (8 /* UpdateFlag.Geometry */ | 2 /* UpdateFlag.Height */)) > 0;
+      // No luck, do our own (potentially expensive) search
+      if (!node || !view.docView.dom.contains(node)) {
+          let line = LineView.find(view.docView, lineStart);
+          if (!line)
+              return yOffset > block.top + block.height / 2 ? block.to : block.from;
+          ({ node, offset } = domPosAtCoords(line.dom, x, y));
       }
-      /**
-      True when this update indicates a focus change.
-      */
-      get focusChanged() {
-          return (this.flags & 1 /* UpdateFlag.Focus */) > 0;
+      let nearest = view.docView.nearest(node);
+      if (!nearest)
+          return null;
+      if (nearest.isWidget && ((_b = nearest.dom) === null || _b === void 0 ? void 0 : _b.nodeType) == 1) {
+          let rect = nearest.dom.getBoundingClientRect();
+          return coords.y < rect.top || coords.y <= rect.bottom && coords.x <= (rect.left + rect.right) / 2
+              ? nearest.posAtStart : nearest.posAtEnd;
       }
-      /**
-      Whether the document changed in this update.
-      */
-      get docChanged() {
-          return !this.changes.empty;
+      else {
+          return nearest.localPosFromDOM(node, offset) + nearest.posAtStart;
       }
-      /**
-      Whether the selection was explicitly set in this update.
-      */
-      get selectionSet() {
-          return this.transactions.some(tr => tr.selection);
+  }
+  function posAtCoordsImprecise(view, contentRect, block, x, y) {
+      let into = Math.round((x - contentRect.left) * view.defaultCharacterWidth);
+      if (view.lineWrapping && block.height > view.defaultLineHeight * 1.5) {
+          let textHeight = view.viewState.heightOracle.textHeight;
+          let line = Math.floor((y - block.top - (view.defaultLineHeight - textHeight) * 0.5) / textHeight);
+          into += line * view.viewState.heightOracle.lineLength;
       }
-      /**
-      @internal
-      */
-      get empty() { return this.flags == 0 && this.transactions.length == 0; }
+      let content = view.state.sliceDoc(block.from, block.to);
+      return block.from + findColumn(content, into, view.state.tabSize);
   }
-
-  /**
-  Used to indicate [text direction](https://codemirror.net/6/docs/ref/#view.EditorView.textDirection).
-  */
-  var Direction = /*@__PURE__*/(function (Direction) {
-      // (These are chosen to match the base levels, in bidi algorithm
-      // terms, of spans in that direction.)
-      /**
-      Left-to-right.
-      */
-      Direction[Direction["LTR"] = 0] = "LTR";
-      /**
-      Right-to-left.
-      */
-      Direction[Direction["RTL"] = 1] = "RTL";
-  return Direction})(Direction || (Direction = {}));
-  const LTR = Direction.LTR, RTL = Direction.RTL;
-  // Decode a string with each type encoded as log2(type)
-  function dec(str) {
-      let result = [];
-      for (let i = 0; i < str.length; i++)
-          result.push(1 << +str[i]);
-      return result;
+  // In case of a high line height, Safari's caretRangeFromPoint treats
+  // the space between lines as belonging to the last character of the
+  // line before. This is used to detect such a result so that it can be
+  // ignored (issue #401).
+  function isSuspiciousSafariCaretResult(node, offset, x) {
+      let len;
+      if (node.nodeType != 3 || offset != (len = node.nodeValue.length))
+          return false;
+      for (let next = node.nextSibling; next; next = next.nextSibling)
+          if (next.nodeType != 1 || next.nodeName != "BR")
+              return false;
+      return textRange(node, len - 1, len).getBoundingClientRect().left > x;
   }
-  // Character types for codepoints 0 to 0xf8
-  const LowTypes = /*@__PURE__*/dec("88888888888888888888888888888888888666888888787833333333337888888000000000000000000000000008888880000000000000000000000000088888888888888888888888888888888888887866668888088888663380888308888800000000000000000000000800000000000000000000000000000008");
-  // Character types for codepoints 0x600 to 0x6f9
-  const ArabicTypes = /*@__PURE__*/dec("4444448826627288999999999992222222222222222222222222222222222222222222222229999999999999999999994444444444644222822222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222999999949999999229989999223333333333");
-  const Brackets = /*@__PURE__*/Object.create(null), BracketStack = [];
-  // There's a lot more in
-  // https://www.unicode.org/Public/UCD/latest/ucd/BidiBrackets.txt,
-  // which are left out to keep code size down.
-  for (let p of ["()", "[]", "{}"]) {
-      let l = /*@__PURE__*/p.charCodeAt(0), r = /*@__PURE__*/p.charCodeAt(1);
-      Brackets[l] = r;
-      Brackets[r] = -l;
+  // Chrome will move positions between lines to the start of the next line
+  function isSuspiciousChromeCaretResult(node, offset, x) {
+      if (offset != 0)
+          return false;
+      for (let cur = node;;) {
+          let parent = cur.parentNode;
+          if (!parent || parent.nodeType != 1 || parent.firstChild != cur)
+              return false;
+          if (parent.classList.contains("cm-line"))
+              break;
+          cur = parent;
+      }
+      let rect = node.nodeType == 1 ? node.getBoundingClientRect()
+          : textRange(node, 0, Math.max(node.nodeValue.length, 1)).getBoundingClientRect();
+      return x - rect.left > 5;
   }
-  function charType(ch) {
-      return ch <= 0xf7 ? LowTypes[ch] :
-          0x590 <= ch && ch <= 0x5f4 ? 2 /* T.R */ :
-              0x600 <= ch && ch <= 0x6f9 ? ArabicTypes[ch - 0x600] :
-                  0x6ee <= ch && ch <= 0x8ac ? 4 /* T.AL */ :
-                      0x2000 <= ch && ch <= 0x200b ? 256 /* T.NI */ :
-                          0xfb50 <= ch && ch <= 0xfdff ? 4 /* T.AL */ :
-                              ch == 0x200c ? 256 /* T.NI */ : 1 /* T.L */;
+  function blockAt(view, pos) {
+      let line = view.lineBlockAt(pos);
+      if (Array.isArray(line.type))
+          for (let l of line.type) {
+              if (l.to > pos || l.to == pos && (l.to == line.to || l.type == BlockType.Text))
+                  return l;
+          }
+      return line;
   }
-  const BidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac\ufb50-\ufdff]/;
-  /**
-  Represents a contiguous range of text that has a single direction
-  (as in left-to-right or right-to-left).
-  */
-  class BidiSpan {
-      /**
-      @internal
-      */
-      constructor(
-      /**
-      The start of the span (relative to the start of the line).
-      */
-      from, 
-      /**
-      The end of the span.
-      */
-      to, 
-      /**
-      The ["bidi
-      level"](https://unicode.org/reports/tr9/#Basic_Display_Algorithm)
-      of the span (in this context, 0 means
-      left-to-right, 1 means right-to-left, 2 means left-to-right
-      number inside right-to-left text).
-      */
-      level) {
-          this.from = from;
-          this.to = to;
-          this.level = level;
+  function moveToLineBoundary(view, start, forward, includeWrap) {
+      let line = blockAt(view, start.head);
+      let coords = !includeWrap || line.type != BlockType.Text || !(view.lineWrapping || line.widgetLineBreaks) ? null
+          : view.coordsAtPos(start.assoc < 0 && start.head > line.from ? start.head - 1 : start.head);
+      if (coords) {
+          let editorRect = view.dom.getBoundingClientRect();
+          let direction = view.textDirectionAt(line.from);
+          let pos = view.posAtCoords({ x: forward == (direction == Direction.LTR) ? editorRect.right - 1 : editorRect.left + 1,
+              y: (coords.top + coords.bottom) / 2 });
+          if (pos != null)
+              return EditorSelection.cursor(pos, forward ? -1 : 1);
       }
-      /**
-      The direction of this span.
-      */
-      get dir() { return this.level % 2 ? RTL : LTR; }
-      /**
-      @internal
-      */
-      side(end, dir) { return (this.dir == dir) == end ? this.to : this.from; }
-      /**
-      @internal
-      */
-      static find(order, index, level, assoc) {
-          let maybe = -1;
-          for (let i = 0; i < order.length; i++) {
-              let span = order[i];
-              if (span.from <= index && span.to >= index) {
-                  if (span.level == level)
-                      return i;
-                  // When multiple spans match, if assoc != 0, take the one that
-                  // covers that side, otherwise take the one with the minimum
-                  // level.
-                  if (maybe < 0 || (assoc != 0 ? (assoc < 0 ? span.from < index : span.to > index) : order[maybe].level > span.level))
-                      maybe = i;
-              }
+      return EditorSelection.cursor(forward ? line.to : line.from, forward ? -1 : 1);
+  }
+  function moveByChar(view, start, forward, by) {
+      let line = view.state.doc.lineAt(start.head), spans = view.bidiSpans(line);
+      let direction = view.textDirectionAt(line.from);
+      for (let cur = start, check = null;;) {
+          let next = moveVisually(line, spans, direction, cur, forward), char = movedOver;
+          if (!next) {
+              if (line.number == (forward ? view.state.doc.lines : 1))
+                  return cur;
+              char = "\n";
+              line = view.state.doc.line(line.number + (forward ? 1 : -1));
+              spans = view.bidiSpans(line);
+              next = EditorSelection.cursor(forward ? line.from : line.to);
           }
-          if (maybe < 0)
-              throw new RangeError("Index out of range");
-          return maybe;
+          if (!check) {
+              if (!by)
+                  return next;
+              check = by(char);
+          }
+          else if (!check(char)) {
+              return cur;
+          }
+          cur = next;
       }
   }
-  // Reused array of character types
-  const types = [];
-  function computeOrder(line, direction) {
-      let len = line.length, outerType = direction == LTR ? 1 /* T.L */ : 2 /* T.R */, oppositeType = direction == LTR ? 2 /* T.R */ : 1 /* T.L */;
-      if (!line || outerType == 1 /* T.L */ && !BidiRE.test(line))
-          return trivialOrder(len);
-      // W1. Examine each non-spacing mark (NSM) in the level run, and
-      // change the type of the NSM to the type of the previous
-      // character. If the NSM is at the start of the level run, it will
-      // get the type of sor.
-      // W2. Search backwards from each instance of a European number
-      // until the first strong type (R, L, AL, or sor) is found. If an
-      // AL is found, change the type of the European number to Arabic
-      // number.
-      // W3. Change all ALs to R.
-      // (Left after this: L, R, EN, AN, ET, CS, NI)
-      for (let i = 0, prev = outerType, prevStrong = outerType; i < len; i++) {
-          let type = charType(line.charCodeAt(i));
-          if (type == 512 /* T.NSM */)
-              type = prev;
-          else if (type == 8 /* T.EN */ && prevStrong == 4 /* T.AL */)
-              type = 16 /* T.AN */;
-          types[i] = type == 4 /* T.AL */ ? 2 /* T.R */ : type;
-          if (type & 7 /* T.Strong */)
-              prevStrong = type;
-          prev = type;
+  function byGroup(view, pos, start) {
+      let categorize = view.state.charCategorizer(pos);
+      let cat = categorize(start);
+      return (next) => {
+          let nextCat = categorize(next);
+          if (cat == CharCategory.Space)
+              cat = nextCat;
+          return cat == nextCat;
+      };
+  }
+  function moveVertically(view, start, forward, distance) {
+      let startPos = start.head, dir = forward ? 1 : -1;
+      if (startPos == (forward ? view.state.doc.length : 0))
+          return EditorSelection.cursor(startPos, start.assoc);
+      let goal = start.goalColumn, startY;
+      let rect = view.contentDOM.getBoundingClientRect();
+      let startCoords = view.coordsAtPos(startPos), docTop = view.documentTop;
+      if (startCoords) {
+          if (goal == null)
+              goal = startCoords.left - rect.left;
+          startY = dir < 0 ? startCoords.top : startCoords.bottom;
       }
-      // W5. A sequence of European terminators adjacent to European
-      // numbers changes to all European numbers.
-      // W6. Otherwise, separators and terminators change to Other
-      // Neutral.
-      // W7. Search backwards from each instance of a European number
-      // until the first strong type (R, L, or sor) is found. If an L is
-      // found, then change the type of the European number to L.
-      // (Left after this: L, R, EN+AN, NI)
-      for (let i = 0, prev = outerType, prevStrong = outerType; i < len; i++) {
-          let type = types[i];
-          if (type == 128 /* T.CS */) {
-              if (i < len - 1 && prev == types[i + 1] && (prev & 24 /* T.Num */))
-                  type = types[i] = prev;
-              else
-                  types[i] = 256 /* T.NI */;
+      else {
+          let line = view.viewState.lineBlockAt(startPos);
+          if (goal == null)
+              goal = Math.min(rect.right - rect.left, view.defaultCharacterWidth * (startPos - line.from));
+          startY = (dir < 0 ? line.top : line.bottom) + docTop;
+      }
+      let resolvedGoal = rect.left + goal;
+      let dist = distance !== null && distance !== void 0 ? distance : (view.viewState.heightOracle.textHeight >> 1);
+      for (let extra = 0;; extra += 10) {
+          let curY = startY + (dist + extra) * dir;
+          let pos = posAtCoords(view, { x: resolvedGoal, y: curY }, false, dir);
+          if (curY < rect.top || curY > rect.bottom || (dir < 0 ? pos < startPos : pos > startPos))
+              return EditorSelection.cursor(pos, start.assoc, undefined, goal);
+      }
+  }
+  function skipAtomicRanges(atoms, pos, bias) {
+      for (;;) {
+          let moved = 0;
+          for (let set of atoms) {
+              set.between(pos - 1, pos + 1, (from, to, value) => {
+                  if (pos > from && pos < to) {
+                      let side = moved || bias || (pos - from < to - pos ? -1 : 1);
+                      pos = side < 0 ? from : to;
+                      moved = side;
+                  }
+              });
           }
-          else if (type == 64 /* T.ET */) {
-              let end = i + 1;
-              while (end < len && types[end] == 64 /* T.ET */)
-                  end++;
-              let replace = (i && prev == 8 /* T.EN */) || (end < len && types[end] == 8 /* T.EN */) ? (prevStrong == 1 /* T.L */ ? 1 /* T.L */ : 8 /* T.EN */) : 256 /* T.NI */;
-              for (let j = i; j < end; j++)
-                  types[j] = replace;
-              i = end - 1;
+          if (!moved)
+              return pos;
+      }
+  }
+  function skipAtoms(view, oldPos, pos) {
+      let newPos = skipAtomicRanges(view.state.facet(atomicRanges).map(f => f(view)), pos.from, oldPos.head > pos.from ? -1 : 1);
+      return newPos == pos.from ? pos : EditorSelection.cursor(newPos, newPos < pos.from ? 1 : -1);
+  }
+
+  // This will also be where dragging info and such goes
+  class InputState {
+      constructor(view) {
+          this.lastKeyCode = 0;
+          this.lastKeyTime = 0;
+          this.lastTouchTime = 0;
+          this.lastFocusTime = 0;
+          this.lastScrollTop = 0;
+          this.lastScrollLeft = 0;
+          this.chromeScrollHack = -1;
+          // On iOS, some keys need to have their default behavior happen
+          // (after which we retroactively handle them and reset the DOM) to
+          // avoid messing up the virtual keyboard state.
+          this.pendingIOSKey = undefined;
+          this.lastSelectionOrigin = null;
+          this.lastSelectionTime = 0;
+          this.lastEscPress = 0;
+          this.lastContextMenu = 0;
+          this.scrollHandlers = [];
+          this.registeredEvents = [];
+          this.customHandlers = [];
+          // -1 means not in a composition. Otherwise, this counts the number
+          // of changes made during the composition. The count is used to
+          // avoid treating the start state of the composition, before any
+          // changes have been made, as part of the composition.
+          this.composing = -1;
+          // Tracks whether the next change should be marked as starting the
+          // composition (null means no composition, true means next is the
+          // first, false means first has already been marked for this
+          // composition)
+          this.compositionFirstChange = null;
+          // End time of the previous composition
+          this.compositionEndedAt = 0;
+          // Used in a kludge to detect when an Enter keypress should be
+          // considered part of the composition on Safari, which fires events
+          // in the wrong order
+          this.compositionPendingKey = false;
+          // Used to categorize changes as part of a composition, even when
+          // the mutation events fire shortly after the compositionend event
+          this.compositionPendingChange = false;
+          this.mouseSelection = null;
+          let handleEvent = (handler, event) => {
+              if (this.ignoreDuringComposition(event))
+                  return;
+              if (event.type == "keydown" && this.keydown(view, event))
+                  return;
+              if (this.mustFlushObserver(event))
+                  view.observer.forceFlush();
+              if (this.runCustomHandlers(event.type, view, event))
+                  event.preventDefault();
+              else
+                  handler(view, event);
+          };
+          for (let type in handlers) {
+              let handler = handlers[type];
+              view.contentDOM.addEventListener(type, event => {
+                  if (eventBelongsToEditor(view, event))
+                      handleEvent(handler, event);
+              }, handlerOptions[type]);
+              this.registeredEvents.push(type);
           }
-          else if (type == 8 /* T.EN */ && prevStrong == 1 /* T.L */) {
-              types[i] = 1 /* T.L */;
+          view.scrollDOM.addEventListener("mousedown", (event) => {
+              if (event.target == view.scrollDOM && event.clientY > view.contentDOM.getBoundingClientRect().bottom) {
+                  handleEvent(handlers.mousedown, event);
+                  if (!event.defaultPrevented && event.button == 2) {
+                      // Make sure the content covers the entire scroller height, in order
+                      // to catch a native context menu click below it
+                      let start = view.contentDOM.style.minHeight;
+                      view.contentDOM.style.minHeight = "100%";
+                      setTimeout(() => view.contentDOM.style.minHeight = start, 200);
+                  }
+              }
+          });
+          view.scrollDOM.addEventListener("drop", (event) => {
+              if (event.target == view.scrollDOM && event.clientY > view.contentDOM.getBoundingClientRect().bottom)
+                  handleEvent(handlers.drop, event);
+          });
+          if (browser.chrome && browser.chrome_version == 102) { // FIXME remove at some point
+              // On Chrome 102, viewport updates somehow stop wheel-based
+              // scrolling. Turning off pointer events during the scroll seems
+              // to avoid the issue.
+              view.scrollDOM.addEventListener("wheel", () => {
+                  if (this.chromeScrollHack < 0)
+                      view.contentDOM.style.pointerEvents = "none";
+                  else
+                      window.clearTimeout(this.chromeScrollHack);
+                  this.chromeScrollHack = setTimeout(() => {
+                      this.chromeScrollHack = -1;
+                      view.contentDOM.style.pointerEvents = "";
+                  }, 100);
+              }, { passive: true });
           }
-          prev = type;
-          if (type & 7 /* T.Strong */)
-              prevStrong = type;
+          this.notifiedFocused = view.hasFocus;
+          // On Safari adding an input event handler somehow prevents an
+          // issue where the composition vanishes when you press enter.
+          if (browser.safari)
+              view.contentDOM.addEventListener("input", () => null);
       }
-      // N0. Process bracket pairs in an isolating run sequence
-      // sequentially in the logical order of the text positions of the
-      // opening paired brackets using the logic given below. Within this
-      // scope, bidirectional types EN and AN are treated as R.
-      for (let i = 0, sI = 0, context = 0, ch, br, type; i < len; i++) {
-          // Keeps [startIndex, type, strongSeen] triples for each open
-          // bracket on BracketStack.
-          if (br = Brackets[ch = line.charCodeAt(i)]) {
-              if (br < 0) { // Closing bracket
-                  for (let sJ = sI - 3; sJ >= 0; sJ -= 3) {
-                      if (BracketStack[sJ + 1] == -br) {
-                          let flags = BracketStack[sJ + 2];
-                          let type = (flags & 2 /* Bracketed.EmbedInside */) ? outerType :
-                              !(flags & 4 /* Bracketed.OppositeInside */) ? 0 :
-                                  (flags & 1 /* Bracketed.OppositeBefore */) ? oppositeType : outerType;
-                          if (type)
-                              types[i] = types[BracketStack[sJ]] = type;
-                          sI = sJ;
-                          break;
+      setSelectionOrigin(origin) {
+          this.lastSelectionOrigin = origin;
+          this.lastSelectionTime = Date.now();
+      }
+      ensureHandlers(view, plugins) {
+          var _a;
+          let handlers;
+          this.customHandlers = [];
+          for (let plugin of plugins)
+              if (handlers = (_a = plugin.update(view).spec) === null || _a === void 0 ? void 0 : _a.domEventHandlers) {
+                  this.customHandlers.push({ plugin: plugin.value, handlers });
+                  for (let type in handlers)
+                      if (this.registeredEvents.indexOf(type) < 0 && type != "scroll") {
+                          this.registeredEvents.push(type);
+                          view.contentDOM.addEventListener(type, (event) => {
+                              if (!eventBelongsToEditor(view, event))
+                                  return;
+                              if (this.runCustomHandlers(type, view, event))
+                                  event.preventDefault();
+                          });
                       }
-                  }
-              }
-              else if (BracketStack.length == 189 /* Bracketed.MaxDepth */) {
-                  break;
-              }
-              else {
-                  BracketStack[sI++] = i;
-                  BracketStack[sI++] = ch;
-                  BracketStack[sI++] = context;
               }
-          }
-          else if ((type = types[i]) == 2 /* T.R */ || type == 1 /* T.L */) {
-              let embed = type == outerType;
-              context = embed ? 0 : 1 /* Bracketed.OppositeBefore */;
-              for (let sJ = sI - 3; sJ >= 0; sJ -= 3) {
-                  let cur = BracketStack[sJ + 2];
-                  if (cur & 2 /* Bracketed.EmbedInside */)
-                      break;
-                  if (embed) {
-                      BracketStack[sJ + 2] |= 2 /* Bracketed.EmbedInside */;
+      }
+      runCustomHandlers(type, view, event) {
+          for (let set of this.customHandlers) {
+              let handler = set.handlers[type];
+              if (handler) {
+                  try {
+                      if (handler.call(set.plugin, event, view) || event.defaultPrevented)
+                          return true;
                   }
-                  else {
-                      if (cur & 4 /* Bracketed.OppositeInside */)
-                          break;
-                      BracketStack[sJ + 2] |= 4 /* Bracketed.OppositeInside */;
+                  catch (e) {
+                      logException(view.state, e);
                   }
               }
           }
+          return false;
       }
-      // N1. A sequence of neutrals takes the direction of the
-      // surrounding strong text if the text on both sides has the same
-      // direction. European and Arabic numbers act as if they were R in
-      // terms of their influence on neutrals. Start-of-level-run (sor)
-      // and end-of-level-run (eor) are used at level run boundaries.
-      // N2. Any remaining neutrals take the embedding direction.
-      // (Left after this: L, R, EN+AN)
-      for (let i = 0; i < len; i++) {
-          if (types[i] == 256 /* T.NI */) {
-              let end = i + 1;
-              while (end < len && types[end] == 256 /* T.NI */)
-                  end++;
-              let beforeL = (i ? types[i - 1] : outerType) == 1 /* T.L */;
-              let afterL = (end < len ? types[end] : outerType) == 1 /* T.L */;
-              let replace = beforeL == afterL ? (beforeL ? 1 /* T.L */ : 2 /* T.R */) : outerType;
-              for (let j = i; j < end; j++)
-                  types[j] = replace;
-              i = end - 1;
-          }
-      }
-      // Here we depart from the documented algorithm, in order to avoid
-      // building up an actual levels array. Since there are only three
-      // levels (0, 1, 2) in an implementation that doesn't take
-      // explicit embedding into account, we can build up the order on
-      // the fly, without following the level-based algorithm.
-      let order = [];
-      if (outerType == 1 /* T.L */) {
-          for (let i = 0; i < len;) {
-              let start = i, rtl = types[i++] != 1 /* T.L */;
-              while (i < len && rtl == (types[i] != 1 /* T.L */))
-                  i++;
-              if (rtl) {
-                  for (let j = i; j > start;) {
-                      let end = j, l = types[--j] != 2 /* T.R */;
-                      while (j > start && l == (types[j - 1] != 2 /* T.R */))
-                          j--;
-                      order.push(new BidiSpan(j, end, l ? 2 : 1));
+      runScrollHandlers(view, event) {
+          this.lastScrollTop = view.scrollDOM.scrollTop;
+          this.lastScrollLeft = view.scrollDOM.scrollLeft;
+          for (let set of this.customHandlers) {
+              let handler = set.handlers.scroll;
+              if (handler) {
+                  try {
+                      handler.call(set.plugin, event, view);
+                  }
+                  catch (e) {
+                      logException(view.state, e);
                   }
-              }
-              else {
-                  order.push(new BidiSpan(start, i, 0));
               }
           }
       }
-      else {
-          for (let i = 0; i < len;) {
-              let start = i, rtl = types[i++] == 2 /* T.R */;
-              while (i < len && rtl == (types[i] == 2 /* T.R */))
-                  i++;
-              order.push(new BidiSpan(start, i, rtl ? 1 : 2));
+      keydown(view, event) {
+          // Must always run, even if a custom handler handled the event
+          this.lastKeyCode = event.keyCode;
+          this.lastKeyTime = Date.now();
+          if (event.keyCode == 9 && Date.now() < this.lastEscPress + 2000)
+              return true;
+          if (event.keyCode != 27 && modifierCodes.indexOf(event.keyCode) < 0)
+              view.inputState.lastEscPress = 0;
+          // Chrome for Android usually doesn't fire proper key events, but
+          // occasionally does, usually surrounded by a bunch of complicated
+          // composition changes. When an enter or backspace key event is
+          // seen, hold off on handling DOM events for a bit, and then
+          // dispatch it.
+          if (browser.android && browser.chrome && !event.synthetic &&
+              (event.keyCode == 13 || event.keyCode == 8)) {
+              view.observer.delayAndroidKey(event.key, event.keyCode);
+              return true;
           }
-      }
-      return order;
-  }
-  function trivialOrder(length) {
-      return [new BidiSpan(0, length, 0)];
-  }
-  let movedOver = "";
-  function moveVisually(line, order, dir, start, forward) {
-      var _a;
-      let startIndex = start.head - line.from, spanI = -1;
-      if (startIndex == 0) {
-          if (!forward || !line.length)
-              return null;
-          if (order[0].level != dir) {
-              startIndex = order[0].side(false, dir);
-              spanI = 0;
+          // Prevent the default behavior of Enter on iOS makes the
+          // virtual keyboard get stuck in the wrong (lowercase)
+          // state. So we let it go through, and then, in
+          // applyDOMChange, notify key handlers of it and reset to
+          // the state they produce.
+          let pending;
+          if (browser.ios && !event.synthetic && !event.altKey && !event.metaKey &&
+              ((pending = PendingKeys.find(key => key.keyCode == event.keyCode)) && !event.ctrlKey ||
+                  EmacsyPendingKeys.indexOf(event.key) > -1 && event.ctrlKey && !event.shiftKey)) {
+              this.pendingIOSKey = pending || event;
+              setTimeout(() => this.flushIOSKey(view), 250);
+              return true;
           }
+          return false;
       }
-      else if (startIndex == line.length) {
-          if (forward)
-              return null;
-          let last = order[order.length - 1];
-          if (last.level != dir) {
-              startIndex = last.side(true, dir);
-              spanI = order.length - 1;
+      flushIOSKey(view) {
+          let key = this.pendingIOSKey;
+          if (!key)
+              return false;
+          this.pendingIOSKey = undefined;
+          return dispatchKey(view.contentDOM, key.key, key.keyCode);
+      }
+      ignoreDuringComposition(event) {
+          if (!/^key/.test(event.type))
+              return false;
+          if (this.composing > 0)
+              return true;
+          // See https://www.stum.de/2016/06/24/handling-ime-events-in-javascript/.
+          // On some input method editors (IMEs), the Enter key is used to
+          // confirm character selection. On Safari, when Enter is pressed,
+          // compositionend and keydown events are sometimes emitted in the
+          // wrong order. The key event should still be ignored, even when
+          // it happens after the compositionend event.
+          if (browser.safari && !browser.ios && this.compositionPendingKey && Date.now() - this.compositionEndedAt < 100) {
+              this.compositionPendingKey = false;
+              return true;
           }
+          return false;
       }
-      if (spanI < 0)
-          spanI = BidiSpan.find(order, startIndex, (_a = start.bidiLevel) !== null && _a !== void 0 ? _a : -1, start.assoc);
-      let span = order[spanI];
-      // End of span. (But not end of line--that was checked for above.)
-      if (startIndex == span.side(forward, dir)) {
-          span = order[spanI += forward ? 1 : -1];
-          startIndex = span.side(!forward, dir);
+      mustFlushObserver(event) {
+          return event.type == "keydown" && event.keyCode != 229;
       }
-      let indexForward = forward == (span.dir == dir);
-      let nextIndex = findClusterBreak(line.text, startIndex, indexForward);
-      movedOver = line.text.slice(Math.min(startIndex, nextIndex), Math.max(startIndex, nextIndex));
-      if (nextIndex != span.side(forward, dir))
-          return EditorSelection.cursor(nextIndex + line.from, indexForward ? -1 : 1, span.level);
-      let nextSpan = spanI == (forward ? order.length - 1 : 0) ? null : order[spanI + (forward ? 1 : -1)];
-      if (!nextSpan && span.level != dir)
-          return EditorSelection.cursor(forward ? line.to : line.from, forward ? -1 : 1, dir);
-      if (nextSpan && nextSpan.level < span.level)
-          return EditorSelection.cursor(nextSpan.side(!forward, dir) + line.from, forward ? 1 : -1, nextSpan.level);
-      return EditorSelection.cursor(nextIndex + line.from, forward ? -1 : 1, span.level);
-  }
-
-  const LineBreakPlaceholder = "\uffff";
-  class DOMReader {
-      constructor(points, state) {
-          this.points = points;
-          this.text = "";
-          this.lineSeparator = state.facet(EditorState.lineSeparator);
+      startMouseSelection(mouseSelection) {
+          if (this.mouseSelection)
+              this.mouseSelection.destroy();
+          this.mouseSelection = mouseSelection;
       }
-      append(text) {
-          this.text += text;
+      update(update) {
+          if (this.mouseSelection)
+              this.mouseSelection.update(update);
+          if (update.transactions.length)
+              this.lastKeyCode = this.lastSelectionTime = 0;
       }
-      lineBreak() {
-          this.text += LineBreakPlaceholder;
+      destroy() {
+          if (this.mouseSelection)
+              this.mouseSelection.destroy();
       }
-      readRange(start, end) {
-          if (!start)
-              return this;
-          let parent = start.parentNode;
-          for (let cur = start;;) {
-              this.findPointBefore(parent, cur);
-              this.readNode(cur);
-              let next = cur.nextSibling;
-              if (next == end)
-                  break;
-              let view = ContentView.get(cur), nextView = ContentView.get(next);
-              if (view && nextView ? view.breakAfter :
-                  (view ? view.breakAfter : isBlockElement(cur)) ||
-                      (isBlockElement(next) && (cur.nodeName != "BR" || cur.cmIgnore)))
-                  this.lineBreak();
-              cur = next;
-          }
-          this.findPointBefore(parent, end);
-          return this;
+  }
+  const PendingKeys = [
+      { key: "Backspace", keyCode: 8, inputType: "deleteContentBackward" },
+      { key: "Enter", keyCode: 13, inputType: "insertParagraph" },
+      { key: "Delete", keyCode: 46, inputType: "deleteContentForward" }
+  ];
+  const EmacsyPendingKeys = "dthko";
+  // Key codes for modifier keys
+  const modifierCodes = [16, 17, 18, 20, 91, 92, 224, 225];
+  const dragScrollMargin = 6;
+  function dragScrollSpeed(dist) {
+      return Math.max(0, dist) * 0.7 + 8;
+  }
+  class MouseSelection {
+      constructor(view, startEvent, style, mustSelect) {
+          this.view = view;
+          this.style = style;
+          this.mustSelect = mustSelect;
+          this.scrollSpeed = { x: 0, y: 0 };
+          this.scrolling = -1;
+          this.lastEvent = startEvent;
+          this.scrollParent = scrollableParent(view.contentDOM);
+          this.atoms = view.state.facet(atomicRanges).map(f => f(view));
+          let doc = view.contentDOM.ownerDocument;
+          doc.addEventListener("mousemove", this.move = this.move.bind(this));
+          doc.addEventListener("mouseup", this.up = this.up.bind(this));
+          this.extend = startEvent.shiftKey;
+          this.multiple = view.state.facet(EditorState.allowMultipleSelections) && addsSelectionRange(view, startEvent);
+          this.dragging = isInPrimarySelection(view, startEvent) && getClickType(startEvent) == 1 ? null : false;
       }
-      readTextNode(node) {
-          let text = node.nodeValue;
-          for (let point of this.points)
-              if (point.node == node)
-                  point.pos = this.text.length + Math.min(point.offset, text.length);
-          for (let off = 0, re = this.lineSeparator ? null : /\r\n?|\n/g;;) {
-              let nextBreak = -1, breakSize = 1, m;
-              if (this.lineSeparator) {
-                  nextBreak = text.indexOf(this.lineSeparator, off);
-                  breakSize = this.lineSeparator.length;
-              }
-              else if (m = re.exec(text)) {
-                  nextBreak = m.index;
-                  breakSize = m[0].length;
-              }
-              this.append(text.slice(off, nextBreak < 0 ? text.length : nextBreak));
-              if (nextBreak < 0)
-                  break;
-              this.lineBreak();
-              if (breakSize > 1)
-                  for (let point of this.points)
-                      if (point.node == node && point.pos > this.text.length)
-                          point.pos -= breakSize - 1;
-              off = nextBreak + breakSize;
+      start(event) {
+          // When clicking outside of the selection, immediately apply the
+          // effect of starting the selection
+          if (this.dragging === false) {
+              event.preventDefault();
+              this.select(event);
           }
       }
-      readNode(node) {
-          if (node.cmIgnore)
+      move(event) {
+          var _a;
+          if (event.buttons == 0)
+              return this.destroy();
+          if (this.dragging !== false)
               return;
-          let view = ContentView.get(node);
-          let fromView = view && view.overrideDOMText;
-          if (fromView != null) {
-              this.findPointInside(node, fromView.length);
-              for (let i = fromView.iter(); !i.next().done;) {
-                  if (i.lineBreak)
-                      this.lineBreak();
-                  else
-                      this.append(i.value);
-              }
+          this.select(this.lastEvent = event);
+          let sx = 0, sy = 0;
+          let rect = ((_a = this.scrollParent) === null || _a === void 0 ? void 0 : _a.getBoundingClientRect())
+              || { left: 0, top: 0, right: this.view.win.innerWidth, bottom: this.view.win.innerHeight };
+          let margins = getScrollMargins(this.view);
+          if (event.clientX - margins.left <= rect.left + dragScrollMargin)
+              sx = -dragScrollSpeed(rect.left - event.clientX);
+          else if (event.clientX + margins.right >= rect.right - dragScrollMargin)
+              sx = dragScrollSpeed(event.clientX - rect.right);
+          if (event.clientY - margins.top <= rect.top + dragScrollMargin)
+              sy = -dragScrollSpeed(rect.top - event.clientY);
+          else if (event.clientY + margins.bottom >= rect.bottom - dragScrollMargin)
+              sy = dragScrollSpeed(event.clientY - rect.bottom);
+          this.setScrollSpeed(sx, sy);
+      }
+      up(event) {
+          if (this.dragging == null)
+              this.select(this.lastEvent);
+          if (!this.dragging)
+              event.preventDefault();
+          this.destroy();
+      }
+      destroy() {
+          this.setScrollSpeed(0, 0);
+          let doc = this.view.contentDOM.ownerDocument;
+          doc.removeEventListener("mousemove", this.move);
+          doc.removeEventListener("mouseup", this.up);
+          this.view.inputState.mouseSelection = null;
+      }
+      setScrollSpeed(sx, sy) {
+          this.scrollSpeed = { x: sx, y: sy };
+          if (sx || sy) {
+              if (this.scrolling < 0)
+                  this.scrolling = setInterval(() => this.scroll(), 50);
           }
-          else if (node.nodeType == 3) {
-              this.readTextNode(node);
+          else if (this.scrolling > -1) {
+              clearInterval(this.scrolling);
+              this.scrolling = -1;
           }
-          else if (node.nodeName == "BR") {
-              if (node.nextSibling)
-                  this.lineBreak();
+      }
+      scroll() {
+          if (this.scrollParent) {
+              this.scrollParent.scrollLeft += this.scrollSpeed.x;
+              this.scrollParent.scrollTop += this.scrollSpeed.y;
           }
-          else if (node.nodeType == 1) {
-              this.readRange(node.firstChild, null);
+          else {
+              this.view.win.scrollBy(this.scrollSpeed.x, this.scrollSpeed.y);
           }
+          if (this.dragging === false)
+              this.select(this.lastEvent);
       }
-      findPointBefore(node, next) {
-          for (let point of this.points)
-              if (point.node == node && node.childNodes[point.offset] == next)
-                  point.pos = this.text.length;
+      skipAtoms(sel) {
+          let ranges = null;
+          for (let i = 0; i < sel.ranges.length; i++) {
+              let range = sel.ranges[i], updated = null;
+              if (range.empty) {
+                  let pos = skipAtomicRanges(this.atoms, range.from, 0);
+                  if (pos != range.from)
+                      updated = EditorSelection.cursor(pos, -1);
+              }
+              else {
+                  let from = skipAtomicRanges(this.atoms, range.from, -1);
+                  let to = skipAtomicRanges(this.atoms, range.to, 1);
+                  if (from != range.from || to != range.to)
+                      updated = EditorSelection.range(range.from == range.anchor ? from : to, range.from == range.head ? from : to);
+              }
+              if (updated) {
+                  if (!ranges)
+                      ranges = sel.ranges.slice();
+                  ranges[i] = updated;
+              }
+          }
+          return ranges ? EditorSelection.create(ranges, sel.mainIndex) : sel;
       }
-      findPointInside(node, maxLen) {
-          for (let point of this.points)
-              if (node.nodeType == 3 ? point.node == node : node.contains(point.node))
-                  point.pos = this.text.length + Math.min(maxLen, point.offset);
+      select(event) {
+          let { view } = this, selection = this.skipAtoms(this.style.get(event, this.extend, this.multiple));
+          if (this.mustSelect || !selection.eq(view.state.selection) ||
+              selection.main.assoc != view.state.selection.main.assoc)
+              this.view.dispatch({
+                  selection,
+                  userEvent: "select.pointer"
+              });
+          this.mustSelect = false;
+      }
+      update(update) {
+          if (update.docChanged && this.dragging)
+              this.dragging = this.dragging.map(update.changes);
+          if (this.style.update(update))
+              setTimeout(() => this.select(this.lastEvent), 20);
       }
   }
-  function isBlockElement(node) {
-      return node.nodeType == 1 && /^(DIV|P|LI|UL|OL|BLOCKQUOTE|DD|DT|H\d|SECTION|PRE)$/.test(node.nodeName);
+  function addsSelectionRange(view, event) {
+      let facet = view.state.facet(clickAddsSelectionRange);
+      return facet.length ? facet[0](event) : browser.mac ? event.metaKey : event.ctrlKey;
   }
-  class DOMPoint {
-      constructor(node, offset) {
-          this.node = node;
-          this.offset = offset;
-          this.pos = -1;
-      }
+  function dragMovesSelection(view, event) {
+      let facet = view.state.facet(dragMovesSelection$1);
+      return facet.length ? facet[0](event) : browser.mac ? !event.altKey : !event.ctrlKey;
   }
-
-  class DocView extends ContentView {
-      constructor(view) {
-          super();
-          this.view = view;
-          this.compositionDeco = Decoration.none;
-          this.decorations = [];
-          this.dynamicDecorationMap = [];
-          // Track a minimum width for the editor. When measuring sizes in
-          // measureVisibleLineHeights, this is updated to point at the width
-          // of a given element and its extent in the document. When a change
-          // happens in that range, these are reset. That way, once we've seen
-          // a line/element of a given length, we keep the editor wide enough
-          // to fit at least that element, until it is changed, at which point
-          // we forget it again.
-          this.minWidth = 0;
-          this.minWidthFrom = 0;
-          this.minWidthTo = 0;
-          // Track whether the DOM selection was set in a lossy way, so that
-          // we don't mess it up when reading it back it
-          this.impreciseAnchor = null;
-          this.impreciseHead = null;
-          this.forceSelection = false;
-          // Used by the resize observer to ignore resizes that we caused
-          // ourselves
-          this.lastUpdate = Date.now();
-          this.setDOM(view.contentDOM);
-          this.children = [new LineView];
-          this.children[0].setParent(this);
-          this.updateDeco();
-          this.updateInner([new ChangedRange(0, 0, 0, view.state.doc.length)], 0);
-      }
-      get editorView() { return this.view; }
-      get length() { return this.view.state.doc.length; }
-      // Update the document view to a given state. scrollIntoView can be
-      // used as a hint to compute a new viewport that includes that
-      // position, if we know the editor is going to scroll that position
-      // into view.
-      update(update) {
-          let changedRanges = update.changedRanges;
-          if (this.minWidth > 0 && changedRanges.length) {
-              if (!changedRanges.every(({ fromA, toA }) => toA < this.minWidthFrom || fromA > this.minWidthTo)) {
-                  this.minWidth = this.minWidthFrom = this.minWidthTo = 0;
-              }
-              else {
-                  this.minWidthFrom = update.changes.mapPos(this.minWidthFrom, 1);
-                  this.minWidthTo = update.changes.mapPos(this.minWidthTo, 1);
-              }
-          }
-          if (this.view.inputState.composing < 0)
-              this.compositionDeco = Decoration.none;
-          else if (update.transactions.length || this.dirty)
-              this.compositionDeco = computeCompositionDeco(this.view, update.changes);
-          // When the DOM nodes around the selection are moved to another
-          // parent, Chrome sometimes reports a different selection through
-          // getSelection than the one that it actually shows to the user.
-          // This forces a selection update when lines are joined to work
-          // around that. Issue #54
-          if ((browser.ie || browser.chrome) && !this.compositionDeco.size && update &&
-              update.state.doc.lines != update.startState.doc.lines)
-              this.forceSelection = true;
-          let prevDeco = this.decorations, deco = this.updateDeco();
-          let decoDiff = findChangedDeco(prevDeco, deco, update.changes);
-          changedRanges = ChangedRange.extendWithRanges(changedRanges, decoDiff);
-          if (this.dirty == 0 /* Dirty.Not */ && changedRanges.length == 0) {
-              return false;
-          }
-          else {
-              this.updateInner(changedRanges, update.startState.doc.length);
-              if (update.transactions.length)
-                  this.lastUpdate = Date.now();
+  function isInPrimarySelection(view, event) {
+      let { main } = view.state.selection;
+      if (main.empty)
+          return false;
+      // On boundary clicks, check whether the coordinates are inside the
+      // selection's client rectangles
+      let sel = getSelection(view.root);
+      if (!sel || sel.rangeCount == 0)
+          return true;
+      let rects = sel.getRangeAt(0).getClientRects();
+      for (let i = 0; i < rects.length; i++) {
+          let rect = rects[i];
+          if (rect.left <= event.clientX && rect.right >= event.clientX &&
+              rect.top <= event.clientY && rect.bottom >= event.clientY)
               return true;
-          }
       }
-      // Used by update and the constructor do perform the actual DOM
-      // update
-      updateInner(changes, oldLength) {
-          this.view.viewState.mustMeasureContent = true;
-          this.updateChildren(changes, oldLength);
-          let { observer } = this.view;
-          observer.ignore(() => {
-              // Lock the height during redrawing, since Chrome sometimes
-              // messes with the scroll position during DOM mutation (though
-              // no relayout is triggered and I cannot imagine how it can
-              // recompute the scroll position without a layout)
-              this.dom.style.height = this.view.viewState.contentHeight + "px";
-              this.dom.style.flexBasis = this.minWidth ? this.minWidth + "px" : "";
-              // Chrome will sometimes, when DOM mutations occur directly
-              // around the selection, get confused and report a different
-              // selection from the one it displays (issue #218). This tries
-              // to detect that situation.
-              let track = browser.chrome || browser.ios ? { node: observer.selectionRange.focusNode, written: false } : undefined;
-              this.sync(track);
-              this.dirty = 0 /* Dirty.Not */;
-              if (track && (track.written || observer.selectionRange.focusNode != track.node))
-                  this.forceSelection = true;
-              this.dom.style.height = "";
+      return false;
+  }
+  function eventBelongsToEditor(view, event) {
+      if (!event.bubbles)
+          return true;
+      if (event.defaultPrevented)
+          return false;
+      for (let node = event.target, cView; node != view.contentDOM; node = node.parentNode)
+          if (!node || node.nodeType == 11 || ((cView = ContentView.get(node)) && cView.ignoreEvent(event)))
+              return false;
+      return true;
+  }
+  const handlers = /*@__PURE__*/Object.create(null);
+  const handlerOptions = /*@__PURE__*/Object.create(null);
+  // This is very crude, but unfortunately both these browsers _pretend_
+  // that they have a clipboard API—all the objects and methods are
+  // there, they just don't work, and they are hard to test.
+  const brokenClipboardAPI = (browser.ie && browser.ie_version < 15) ||
+      (browser.ios && browser.webkit_version < 604);
+  function capturePaste(view) {
+      let parent = view.dom.parentNode;
+      if (!parent)
+          return;
+      let target = parent.appendChild(document.createElement("textarea"));
+      target.style.cssText = "position: fixed; left: -10000px; top: 10px";
+      target.focus();
+      setTimeout(() => {
+          view.focus();
+          target.remove();
+          doPaste(view, target.value);
+      }, 50);
+  }
+  function doPaste(view, input) {
+      let { state } = view, changes, i = 1, text = state.toText(input);
+      let byLine = text.lines == state.selection.ranges.length;
+      let linewise = lastLinewiseCopy != null && state.selection.ranges.every(r => r.empty) && lastLinewiseCopy == text.toString();
+      if (linewise) {
+          let lastLine = -1;
+          changes = state.changeByRange(range => {
+              let line = state.doc.lineAt(range.from);
+              if (line.from == lastLine)
+                  return { range };
+              lastLine = line.from;
+              let insert = state.toText((byLine ? text.line(i++).text : input) + state.lineBreak);
+              return { changes: { from: line.from, insert },
+                  range: EditorSelection.cursor(range.from + insert.length) };
           });
-          let gaps = [];
-          if (this.view.viewport.from || this.view.viewport.to < this.view.state.doc.length)
-              for (let child of this.children)
-                  if (child instanceof BlockWidgetView && child.widget instanceof BlockGapWidget)
-                      gaps.push(child.dom);
-          observer.updateGaps(gaps);
       }
-      updateChildren(changes, oldLength) {
-          let cursor = this.childCursor(oldLength);
-          for (let i = changes.length - 1;; i--) {
-              let next = i >= 0 ? changes[i] : null;
-              if (!next)
-                  break;
-              let { fromA, toA, fromB, toB } = next;
-              let { content, breakAtStart, openStart, openEnd } = ContentBuilder.build(this.view.state.doc, fromB, toB, this.decorations, this.dynamicDecorationMap);
-              let { i: toI, off: toOff } = cursor.findPos(toA, 1);
-              let { i: fromI, off: fromOff } = cursor.findPos(fromA, -1);
-              replaceRange(this, fromI, fromOff, toI, toOff, content, breakAtStart, openStart, openEnd);
-          }
+      else if (byLine) {
+          changes = state.changeByRange(range => {
+              let line = text.line(i++);
+              return { changes: { from: range.from, to: range.to, insert: line.text },
+                  range: EditorSelection.cursor(range.from + line.length) };
+          });
       }
-      // Sync the DOM selection to this.state.selection
-      updateSelection(mustRead = false, fromPointer = false) {
-          if (mustRead || !this.view.observer.selectionRange.focusNode)
-              this.view.observer.readSelectionRange();
-          if (!(fromPointer || this.mayControlSelection()))
-              return;
-          let force = this.forceSelection;
-          this.forceSelection = false;
-          let main = this.view.state.selection.main;
-          // FIXME need to handle the case where the selection falls inside a block range
-          let anchor = this.domAtPos(main.anchor);
-          let head = main.empty ? anchor : this.domAtPos(main.head);
-          // Always reset on Firefox when next to an uneditable node to
-          // avoid invisible cursor bugs (#111)
-          if (browser.gecko && main.empty && betweenUneditable(anchor)) {
-              let dummy = document.createTextNode("");
-              this.view.observer.ignore(() => anchor.node.insertBefore(dummy, anchor.node.childNodes[anchor.offset] || null));
-              anchor = head = new DOMPos(dummy, 0);
-              force = true;
-          }
-          let domSel = this.view.observer.selectionRange;
-          // If the selection is already here, or in an equivalent position, don't touch it
-          if (force || !domSel.focusNode ||
-              !isEquivalentPosition(anchor.node, anchor.offset, domSel.anchorNode, domSel.anchorOffset) ||
-              !isEquivalentPosition(head.node, head.offset, domSel.focusNode, domSel.focusOffset)) {
-              this.view.observer.ignore(() => {
-                  // Chrome Android will hide the virtual keyboard when tapping
-                  // inside an uneditable node, and not bring it back when we
-                  // move the cursor to its proper position. This tries to
-                  // restore the keyboard by cycling focus.
-                  if (browser.android && browser.chrome && this.dom.contains(domSel.focusNode) &&
-                      inUneditable(domSel.focusNode, this.dom)) {
-                      this.dom.blur();
-                      this.dom.focus({ preventScroll: true });
-                  }
-                  let rawSel = getSelection(this.view.root);
-                  if (!rawSel) ;
-                  else if (main.empty) {
-                      // Work around https://bugzilla.mozilla.org/show_bug.cgi?id=1612076
-                      if (browser.gecko) {
-                          let nextTo = nextToUneditable(anchor.node, anchor.offset);
-                          if (nextTo && nextTo != (1 /* NextTo.Before */ | 2 /* NextTo.After */)) {
-                              let text = nearbyTextNode(anchor.node, anchor.offset, nextTo == 1 /* NextTo.Before */ ? 1 : -1);
-                              if (text)
-                                  anchor = new DOMPos(text, nextTo == 1 /* NextTo.Before */ ? 0 : text.nodeValue.length);
-                          }
-                      }
-                      rawSel.collapse(anchor.node, anchor.offset);
-                      if (main.bidiLevel != null && domSel.cursorBidiLevel != null)
-                          domSel.cursorBidiLevel = main.bidiLevel;
-                  }
-                  else if (rawSel.extend) {
-                      // Selection.extend can be used to create an 'inverted' selection
-                      // (one where the focus is before the anchor), but not all
-                      // browsers support it yet.
-                      rawSel.collapse(anchor.node, anchor.offset);
-                      // Safari will ignore the call above when the editor is
-                      // hidden, and then raise an error on the call to extend
-                      // (#940).
-                      try {
-                          rawSel.extend(head.node, head.offset);
-                      }
-                      catch (_) { }
-                  }
-                  else {
-                      // Primitive (IE) way
-                      let range = document.createRange();
-                      if (main.anchor > main.head)
-                          [anchor, head] = [head, anchor];
-                      range.setEnd(head.node, head.offset);
-                      range.setStart(anchor.node, anchor.offset);
-                      rawSel.removeAllRanges();
-                      rawSel.addRange(range);
-                  }
-              });
-              this.view.observer.setSelectionRange(anchor, head);
-          }
-          this.impreciseAnchor = anchor.precise ? null : new DOMPos(domSel.anchorNode, domSel.anchorOffset);
-          this.impreciseHead = head.precise ? null : new DOMPos(domSel.focusNode, domSel.focusOffset);
+      else {
+          changes = state.replaceSelection(text);
       }
-      enforceCursorAssoc() {
-          if (this.compositionDeco.size)
-              return;
-          let { view } = this, cursor = view.state.selection.main;
-          let sel = getSelection(view.root);
-          let { anchorNode, anchorOffset } = view.observer.selectionRange;
-          if (!sel || !cursor.empty || !cursor.assoc || !sel.modify)
-              return;
-          let line = LineView.find(this, cursor.head);
-          if (!line)
-              return;
-          let lineStart = line.posAtStart;
-          if (cursor.head == lineStart || cursor.head == lineStart + line.length)
-              return;
-          let before = this.coordsAt(cursor.head, -1), after = this.coordsAt(cursor.head, 1);
-          if (!before || !after || before.bottom > after.top)
-              return;
-          let dom = this.domAtPos(cursor.head + cursor.assoc);
-          sel.collapse(dom.node, dom.offset);
-          sel.modify("move", cursor.assoc < 0 ? "forward" : "backward", "lineboundary");
-          // This can go wrong in corner cases like single-character lines,
-          // so check and reset if necessary.
-          view.observer.readSelectionRange();
-          let newRange = view.observer.selectionRange;
-          if (view.docView.posFromDOM(newRange.anchorNode, newRange.anchorOffset) != cursor.from)
-              sel.collapse(anchorNode, anchorOffset);
+      view.dispatch(changes, {
+          userEvent: "input.paste",
+          scrollIntoView: true
+      });
+  }
+  handlers.keydown = (view, event) => {
+      view.inputState.setSelectionOrigin("select");
+      if (event.keyCode == 27)
+          view.inputState.lastEscPress = Date.now();
+  };
+  handlers.touchstart = (view, e) => {
+      view.inputState.lastTouchTime = Date.now();
+      view.inputState.setSelectionOrigin("select.pointer");
+  };
+  handlers.touchmove = view => {
+      view.inputState.setSelectionOrigin("select.pointer");
+  };
+  handlerOptions.touchstart = handlerOptions.touchmove = { passive: true };
+  handlers.mousedown = (view, event) => {
+      view.observer.flush();
+      if (view.inputState.lastTouchTime > Date.now() - 2000)
+          return; // Ignore touch interaction
+      let style = null;
+      for (let makeStyle of view.state.facet(mouseSelectionStyle)) {
+          style = makeStyle(view, event);
+          if (style)
+              break;
       }
-      mayControlSelection() {
-          let active = this.view.root.activeElement;
-          return active == this.dom ||
-              hasSelection(this.dom, this.view.observer.selectionRange) && !(active && this.dom.contains(active));
+      if (!style && event.button == 0)
+          style = basicMouseSelection(view, event);
+      if (style) {
+          let mustFocus = view.root.activeElement != view.contentDOM;
+          view.inputState.startMouseSelection(new MouseSelection(view, event, style, mustFocus));
+          if (mustFocus)
+              view.observer.ignore(() => focusPreventScroll(view.contentDOM));
+          if (view.inputState.mouseSelection)
+              view.inputState.mouseSelection.start(event);
       }
-      nearest(dom) {
-          for (let cur = dom; cur;) {
-              let domView = ContentView.get(cur);
-              if (domView && domView.rootView == this)
-                  return domView;
-              cur = cur.parentNode;
-          }
-          return null;
+  };
+  function rangeForClick(view, pos, bias, type) {
+      if (type == 1) { // Single click
+          return EditorSelection.cursor(pos, bias);
       }
-      posFromDOM(node, offset) {
-          let view = this.nearest(node);
-          if (!view)
-              throw new RangeError("Trying to find position for a DOM position outside of the document");
-          return view.localPosFromDOM(node, offset) + view.posAtStart;
+      else if (type == 2) { // Double click
+          return groupAt(view.state, pos, bias);
       }
-      domAtPos(pos) {
-          let { i, off } = this.childCursor().findPos(pos, -1);
-          for (; i < this.children.length - 1;) {
-              let child = this.children[i];
-              if (off < child.length || child instanceof LineView)
-                  break;
-              i++;
-              off = 0;
-          }
-          return this.children[i].domAtPos(off);
+      else { // Triple click
+          let visual = LineView.find(view.docView, pos), line = view.state.doc.lineAt(visual ? visual.posAtEnd : pos);
+          let from = visual ? visual.posAtStart : line.from, to = visual ? visual.posAtEnd : line.to;
+          if (to < view.state.doc.length && to == line.to)
+              to++;
+          return EditorSelection.range(from, to);
       }
-      coordsAt(pos, side) {
-          for (let off = this.length, i = this.children.length - 1;; i--) {
-              let child = this.children[i], start = off - child.breakAfter - child.length;
-              if (pos > start ||
-                  (pos == start && child.type != BlockType.WidgetBefore && child.type != BlockType.WidgetAfter &&
-                      (!i || side == 2 || this.children[i - 1].breakAfter ||
-                          (this.children[i - 1].type == BlockType.WidgetBefore && side > -2))))
-                  return child.coordsAt(pos - start, side);
-              off = start;
-          }
-      }
-      measureVisibleLineHeights(viewport) {
-          let result = [], { from, to } = viewport;
-          let contentWidth = this.view.contentDOM.clientWidth;
-          let isWider = contentWidth > Math.max(this.view.scrollDOM.clientWidth, this.minWidth) + 1;
-          let widest = -1, ltr = this.view.textDirection == Direction.LTR;
-          for (let pos = 0, i = 0; i < this.children.length; i++) {
-              let child = this.children[i], end = pos + child.length;
-              if (end > to)
-                  break;
-              if (pos >= from) {
-                  let childRect = child.dom.getBoundingClientRect();
-                  result.push(childRect.height);
-                  if (isWider) {
-                      let last = child.dom.lastChild;
-                      let rects = last ? clientRectsFor(last) : [];
-                      if (rects.length) {
-                          let rect = rects[rects.length - 1];
-                          let width = ltr ? rect.right - childRect.left : childRect.right - rect.left;
-                          if (width > widest) {
-                              widest = width;
-                              this.minWidth = contentWidth;
-                              this.minWidthFrom = pos;
-                              this.minWidthTo = end;
-                          }
-                      }
-                  }
+  }
+  let insideY = (y, rect) => y >= rect.top && y <= rect.bottom;
+  let inside = (x, y, rect) => insideY(y, rect) && x >= rect.left && x <= rect.right;
+  // Try to determine, for the given coordinates, associated with the
+  // given position, whether they are related to the element before or
+  // the element after the position.
+  function findPositionSide(view, pos, x, y) {
+      let line = LineView.find(view.docView, pos);
+      if (!line)
+          return 1;
+      let off = pos - line.posAtStart;
+      // Line boundaries point into the line
+      if (off == 0)
+          return 1;
+      if (off == line.length)
+          return -1;
+      // Positions on top of an element point at that element
+      let before = line.coordsAt(off, -1);
+      if (before && inside(x, y, before))
+          return -1;
+      let after = line.coordsAt(off, 1);
+      if (after && inside(x, y, after))
+          return 1;
+      // This is probably a line wrap point. Pick before if the point is
+      // beside it.
+      return before && insideY(y, before) ? -1 : 1;
+  }
+  function queryPos(view, event) {
+      let pos = view.posAtCoords({ x: event.clientX, y: event.clientY }, false);
+      return { pos, bias: findPositionSide(view, pos, event.clientX, event.clientY) };
+  }
+  const BadMouseDetail = browser.ie && browser.ie_version <= 11;
+  let lastMouseDown = null, lastMouseDownCount = 0, lastMouseDownTime = 0;
+  function getClickType(event) {
+      if (!BadMouseDetail)
+          return event.detail;
+      let last = lastMouseDown, lastTime = lastMouseDownTime;
+      lastMouseDown = event;
+      lastMouseDownTime = Date.now();
+      return lastMouseDownCount = !last || (lastTime > Date.now() - 400 && Math.abs(last.clientX - event.clientX) < 2 &&
+          Math.abs(last.clientY - event.clientY) < 2) ? (lastMouseDownCount + 1) % 3 : 1;
+  }
+  function basicMouseSelection(view, event) {
+      let start = queryPos(view, event), type = getClickType(event);
+      let startSel = view.state.selection;
+      return {
+          update(update) {
+              if (update.docChanged) {
+                  start.pos = update.changes.mapPos(start.pos);
+                  startSel = startSel.map(update.changes);
               }
-              pos = end + child.breakAfter;
+          },
+          get(event, extend, multiple) {
+              let cur = queryPos(view, event), removed;
+              let range = rangeForClick(view, cur.pos, cur.bias, type);
+              if (start.pos != cur.pos && !extend) {
+                  let startRange = rangeForClick(view, start.pos, start.bias, type);
+                  let from = Math.min(startRange.from, range.from), to = Math.max(startRange.to, range.to);
+                  range = from < range.from ? EditorSelection.range(from, to) : EditorSelection.range(to, from);
+              }
+              if (extend)
+                  return startSel.replaceRange(startSel.main.extend(range.from, range.to));
+              else if (multiple && type == 1 && startSel.ranges.length > 1 && (removed = removeRangeAround(startSel, cur.pos)))
+                  return removed;
+              else if (multiple)
+                  return startSel.addRange(range);
+              else
+                  return EditorSelection.create([range]);
           }
-          return result;
+      };
+  }
+  function removeRangeAround(sel, pos) {
+      for (let i = 0; i < sel.ranges.length; i++) {
+          let { from, to } = sel.ranges[i];
+          if (from <= pos && to >= pos)
+              return EditorSelection.create(sel.ranges.slice(0, i).concat(sel.ranges.slice(i + 1)), sel.mainIndex == i ? 0 : sel.mainIndex - (sel.mainIndex > i ? 1 : 0));
       }
-      textDirectionAt(pos) {
-          let { i } = this.childPos(pos, 1);
-          return getComputedStyle(this.children[i].dom).direction == "rtl" ? Direction.RTL : Direction.LTR;
+      return null;
+  }
+  handlers.dragstart = (view, event) => {
+      let { selection: { main } } = view.state;
+      let { mouseSelection } = view.inputState;
+      if (mouseSelection)
+          mouseSelection.dragging = main;
+      if (event.dataTransfer) {
+          event.dataTransfer.setData("Text", view.state.sliceDoc(main.from, main.to));
+          event.dataTransfer.effectAllowed = "copyMove";
       }
-      measureTextSize() {
-          for (let child of this.children) {
-              if (child instanceof LineView) {
-                  let measure = child.measureTextSize();
-                  if (measure)
-                      return measure;
-              }
+  };
+  function dropText(view, event, text, direct) {
+      if (!text)
+          return;
+      let dropPos = view.posAtCoords({ x: event.clientX, y: event.clientY }, false);
+      event.preventDefault();
+      let { mouseSelection } = view.inputState;
+      let del = direct && mouseSelection && mouseSelection.dragging && dragMovesSelection(view, event) ?
+          { from: mouseSelection.dragging.from, to: mouseSelection.dragging.to } : null;
+      let ins = { from: dropPos, insert: text };
+      let changes = view.state.changes(del ? [del, ins] : ins);
+      view.focus();
+      view.dispatch({
+          changes,
+          selection: { anchor: changes.mapPos(dropPos, -1), head: changes.mapPos(dropPos, 1) },
+          userEvent: del ? "move.drop" : "input.drop"
+      });
+  }
+  handlers.drop = (view, event) => {
+      if (!event.dataTransfer)
+          return;
+      if (view.state.readOnly)
+          return event.preventDefault();
+      let files = event.dataTransfer.files;
+      if (files && files.length) { // For a file drop, read the file's text.
+          event.preventDefault();
+          let text = Array(files.length), read = 0;
+          let finishFile = () => {
+              if (++read == files.length)
+                  dropText(view, event, text.filter(s => s != null).join(view.state.lineBreak), false);
+          };
+          for (let i = 0; i < files.length; i++) {
+              let reader = new FileReader;
+              reader.onerror = finishFile;
+              reader.onload = () => {
+                  if (!/[\x00-\x08\x0e-\x1f]{2}/.test(reader.result))
+                      text[i] = reader.result;
+                  finishFile();
+              };
+              reader.readAsText(files[i]);
           }
-          // If no workable line exists, force a layout of a measurable element
-          let dummy = document.createElement("div"), lineHeight, charWidth;
-          dummy.className = "cm-line";
-          dummy.style.width = "99999px";
-          dummy.textContent = "abc def ghi jkl mno pqr stu";
-          this.view.observer.ignore(() => {
-              this.dom.appendChild(dummy);
-              let rect = clientRectsFor(dummy.firstChild)[0];
-              lineHeight = dummy.getBoundingClientRect().height;
-              charWidth = rect ? rect.width / 27 : 7;
-              dummy.remove();
-          });
-          return { lineHeight, charWidth };
       }
-      childCursor(pos = this.length) {
-          // Move back to start of last element when possible, so that
-          // `ChildCursor.findPos` doesn't have to deal with the edge case
-          // of being after the last element.
-          let i = this.children.length;
-          if (i)
-              pos -= this.children[--i].length;
-          return new ChildCursor(this.children, pos, i);
+      else {
+          dropText(view, event, event.dataTransfer.getData("Text"), true);
       }
-      computeBlockGapDeco() {
-          let deco = [], vs = this.view.viewState;
-          for (let pos = 0, i = 0;; i++) {
-              let next = i == vs.viewports.length ? null : vs.viewports[i];
-              let end = next ? next.from - 1 : this.length;
-              if (end > pos) {
-                  let height = vs.lineBlockAt(end).bottom - vs.lineBlockAt(pos).top;
-                  deco.push(Decoration.replace({
-                      widget: new BlockGapWidget(height),
-                      block: true,
-                      inclusive: true,
-                      isBlockGap: true,
-                  }).range(pos, end));
+  };
+  handlers.paste = (view, event) => {
+      if (view.state.readOnly)
+          return event.preventDefault();
+      view.observer.flush();
+      let data = brokenClipboardAPI ? null : event.clipboardData;
+      if (data) {
+          doPaste(view, data.getData("text/plain") || data.getData("text/uri-text"));
+          event.preventDefault();
+      }
+      else {
+          capturePaste(view);
+      }
+  };
+  function captureCopy(view, text) {
+      // The extra wrapper is somehow necessary on IE/Edge to prevent the
+      // content from being mangled when it is put onto the clipboard
+      let parent = view.dom.parentNode;
+      if (!parent)
+          return;
+      let target = parent.appendChild(document.createElement("textarea"));
+      target.style.cssText = "position: fixed; left: -10000px; top: 10px";
+      target.value = text;
+      target.focus();
+      target.selectionEnd = text.length;
+      target.selectionStart = 0;
+      setTimeout(() => {
+          target.remove();
+          view.focus();
+      }, 50);
+  }
+  function copiedRange(state) {
+      let content = [], ranges = [], linewise = false;
+      for (let range of state.selection.ranges)
+          if (!range.empty) {
+              content.push(state.sliceDoc(range.from, range.to));
+              ranges.push(range);
+          }
+      if (!content.length) {
+          // Nothing selected, do a line-wise copy
+          let upto = -1;
+          for (let { from } of state.selection.ranges) {
+              let line = state.doc.lineAt(from);
+              if (line.number > upto) {
+                  content.push(line.text);
+                  ranges.push({ from: line.from, to: Math.min(state.doc.length, line.to + 1) });
               }
-              if (!next)
-                  break;
-              pos = next.to + 1;
+              upto = line.number;
           }
-          return Decoration.set(deco);
+          linewise = true;
       }
-      updateDeco() {
-          let allDeco = this.view.state.facet(decorations).map((d, i) => {
-              let dynamic = this.dynamicDecorationMap[i] = typeof d == "function";
-              return dynamic ? d(this.view) : d;
-          });
-          for (let i = allDeco.length; i < allDeco.length + 3; i++)
-              this.dynamicDecorationMap[i] = false;
-          return this.decorations = [
-              ...allDeco,
-              this.compositionDeco,
-              this.computeBlockGapDeco(),
-              this.view.viewState.lineGapDeco
-          ];
+      return { text: content.join(state.lineBreak), ranges, linewise };
+  }
+  let lastLinewiseCopy = null;
+  handlers.copy = handlers.cut = (view, event) => {
+      let { text, ranges, linewise } = copiedRange(view.state);
+      if (!text && !linewise)
+          return;
+      lastLinewiseCopy = linewise ? text : null;
+      let data = brokenClipboardAPI ? null : event.clipboardData;
+      if (data) {
+          event.preventDefault();
+          data.clearData();
+          data.setData("text/plain", text);
       }
-      scrollIntoView(target) {
-          let { range } = target;
-          let rect = this.coordsAt(range.head, range.empty ? range.assoc : range.head > range.anchor ? -1 : 1), other;
-          if (!rect)
-              return;
-          if (!range.empty && (other = this.coordsAt(range.anchor, range.anchor > range.head ? -1 : 1)))
-              rect = { left: Math.min(rect.left, other.left), top: Math.min(rect.top, other.top),
-                  right: Math.max(rect.right, other.right), bottom: Math.max(rect.bottom, other.bottom) };
-          let mLeft = 0, mRight = 0, mTop = 0, mBottom = 0;
-          for (let margins of this.view.state.facet(scrollMargins).map(f => f(this.view)))
-              if (margins) {
-                  let { left, right, top, bottom } = margins;
-                  if (left != null)
-                      mLeft = Math.max(mLeft, left);
-                  if (right != null)
-                      mRight = Math.max(mRight, right);
-                  if (top != null)
-                      mTop = Math.max(mTop, top);
-                  if (bottom != null)
-                      mBottom = Math.max(mBottom, bottom);
-              }
-          let targetRect = {
-              left: rect.left - mLeft, top: rect.top - mTop,
-              right: rect.right + mRight, bottom: rect.bottom + mBottom
-          };
-          scrollRectIntoView(this.view.scrollDOM, targetRect, range.head < range.anchor ? -1 : 1, target.x, target.y, target.xMargin, target.yMargin, this.view.textDirection == Direction.LTR);
+      else {
+          captureCopy(view, text);
+      }
+      if (event.type == "cut" && !view.state.readOnly)
+          view.dispatch({
+              changes: ranges,
+              scrollIntoView: true,
+              userEvent: "delete.cut"
+          });
+  };
+  const isFocusChange = /*@__PURE__*/Annotation.define();
+  function focusChangeTransaction(state, focus) {
+      let effects = [];
+      for (let getEffect of state.facet(focusChangeEffect)) {
+          let effect = getEffect(state, focus);
+          if (effect)
+              effects.push(effect);
       }
+      return effects ? state.update({ effects, annotations: isFocusChange.of(true) }) : null;
   }
-  function betweenUneditable(pos) {
-      return pos.node.nodeType == 1 && pos.node.firstChild &&
-          (pos.offset == 0 || pos.node.childNodes[pos.offset - 1].contentEditable == "false") &&
-          (pos.offset == pos.node.childNodes.length || pos.node.childNodes[pos.offset].contentEditable == "false");
+  function updateForFocusChange(view) {
+      setTimeout(() => {
+          let focus = view.hasFocus;
+          if (focus != view.inputState.notifiedFocused) {
+              let tr = focusChangeTransaction(view.state, focus);
+              if (tr)
+                  view.dispatch(tr);
+              else
+                  view.update([]);
+          }
+      }, 10);
   }
-  class BlockGapWidget extends WidgetType {
-      constructor(height) {
-          super();
-          this.height = height;
+  handlers.focus = view => {
+      view.inputState.lastFocusTime = Date.now();
+      // When focusing reset the scroll position, move it back to where it was
+      if (!view.scrollDOM.scrollTop && (view.inputState.lastScrollTop || view.inputState.lastScrollLeft)) {
+          view.scrollDOM.scrollTop = view.inputState.lastScrollTop;
+          view.scrollDOM.scrollLeft = view.inputState.lastScrollLeft;
       }
-      toDOM() {
-          let elt = document.createElement("div");
-          this.updateDOM(elt);
-          return elt;
+      updateForFocusChange(view);
+  };
+  handlers.blur = view => {
+      view.observer.clearSelectionRange();
+      updateForFocusChange(view);
+  };
+  handlers.compositionstart = handlers.compositionupdate = view => {
+      if (view.inputState.compositionFirstChange == null)
+          view.inputState.compositionFirstChange = true;
+      if (view.inputState.composing < 0) {
+          // FIXME possibly set a timeout to clear it again on Android
+          view.inputState.composing = 0;
       }
-      eq(other) { return other.height == this.height; }
-      updateDOM(elt) {
-          elt.style.height = this.height + "px";
-          return true;
+  };
+  handlers.compositionend = view => {
+      view.inputState.composing = -1;
+      view.inputState.compositionEndedAt = Date.now();
+      view.inputState.compositionPendingKey = true;
+      view.inputState.compositionPendingChange = view.observer.pendingRecords().length > 0;
+      view.inputState.compositionFirstChange = null;
+      if (browser.chrome && browser.android) {
+          // Delay flushing for a bit on Android because it'll often fire a
+          // bunch of contradictory changes in a row at end of compositon
+          view.observer.flushSoon();
       }
-      get estimatedHeight() { return this.height; }
-  }
-  function compositionSurroundingNode(view) {
-      let sel = view.observer.selectionRange;
-      let textNode = sel.focusNode && nearbyTextNode(sel.focusNode, sel.focusOffset, 0);
-      if (!textNode)
-          return null;
-      let cView = view.docView.nearest(textNode);
-      if (!cView)
-          return null;
-      if (cView instanceof LineView) {
-          let topNode = textNode;
-          while (topNode.parentNode != cView.dom)
-              topNode = topNode.parentNode;
-          let prev = topNode.previousSibling;
-          while (prev && !ContentView.get(prev))
-              prev = prev.previousSibling;
-          let pos = prev ? ContentView.get(prev).posAtEnd : cView.posAtStart;
-          return { from: pos, to: pos, node: topNode, text: textNode };
+      else if (view.inputState.compositionPendingChange) {
+          // If we found pending records, schedule a flush.
+          Promise.resolve().then(() => view.observer.flush());
       }
       else {
-          for (;;) {
-              let { parent } = cView;
-              if (!parent)
-                  return null;
-              if (parent instanceof LineView)
-                  break;
-              cView = parent;
+          // Otherwise, make sure that, if no changes come in soon, the
+          // composition view is cleared.
+          setTimeout(() => {
+              if (view.inputState.composing < 0 && view.docView.compositionDeco.size)
+                  view.update([]);
+          }, 50);
+      }
+  };
+  handlers.contextmenu = view => {
+      view.inputState.lastContextMenu = Date.now();
+  };
+  handlers.beforeinput = (view, event) => {
+      var _a;
+      // Because Chrome Android doesn't fire useful key events, use
+      // beforeinput to detect backspace (and possibly enter and delete,
+      // but those usually don't even seem to fire beforeinput events at
+      // the moment) and fake a key event for it.
+      //
+      // (preventDefault on beforeinput, though supported in the spec,
+      // seems to do nothing at all on Chrome).
+      let pending;
+      if (browser.chrome && browser.android && (pending = PendingKeys.find(key => key.inputType == event.inputType))) {
+          view.observer.delayAndroidKey(pending.key, pending.keyCode);
+          if (pending.key == "Backspace" || pending.key == "Delete") {
+              let startViewHeight = ((_a = window.visualViewport) === null || _a === void 0 ? void 0 : _a.height) || 0;
+              setTimeout(() => {
+                  var _a;
+                  // Backspacing near uneditable nodes on Chrome Android sometimes
+                  // closes the virtual keyboard. This tries to crudely detect
+                  // that and refocus to get it back.
+                  if ((((_a = window.visualViewport) === null || _a === void 0 ? void 0 : _a.height) || 0) > startViewHeight + 10 && view.hasFocus) {
+                      view.contentDOM.blur();
+                      view.focus();
+                  }
+              }, 100);
           }
-          let from = cView.posAtStart;
-          return { from, to: from + cView.length, node: cView.dom, text: textNode };
       }
-  }
-  function computeCompositionDeco(view, changes) {
-      let surrounding = compositionSurroundingNode(view);
-      if (!surrounding)
-          return Decoration.none;
-      let { from, to, node, text: textNode } = surrounding;
-      let newFrom = changes.mapPos(from, 1), newTo = Math.max(newFrom, changes.mapPos(to, -1));
-      let { state } = view, text = node.nodeType == 3 ? node.nodeValue :
-          new DOMReader([], state).readRange(node.firstChild, null).text;
-      if (newTo - newFrom < text.length) {
-          if (state.doc.sliceString(newFrom, Math.min(state.doc.length, newFrom + text.length), LineBreakPlaceholder) == text)
-              newTo = newFrom + text.length;
-          else if (state.doc.sliceString(Math.max(0, newTo - text.length), newTo, LineBreakPlaceholder) == text)
-              newFrom = newTo - text.length;
-          else
-              return Decoration.none;
+  };
+
+  const wrappingWhiteSpace = ["pre-wrap", "normal", "pre-line", "break-spaces"];
+  class HeightOracle {
+      constructor(lineWrapping) {
+          this.lineWrapping = lineWrapping;
+          this.doc = Text$1.empty;
+          this.heightSamples = {};
+          this.lineHeight = 14; // The height of an entire line (line-height)
+          this.charWidth = 7;
+          this.textHeight = 14; // The height of the actual font (font-size)
+          this.lineLength = 30;
+          // Used to track, during updateHeight, if any actual heights changed
+          this.heightChanged = false;
       }
-      else if (state.doc.sliceString(newFrom, newTo, LineBreakPlaceholder) != text) {
-          return Decoration.none;
+      heightForGap(from, to) {
+          let lines = this.doc.lineAt(to).number - this.doc.lineAt(from).number + 1;
+          if (this.lineWrapping)
+              lines += Math.max(0, Math.ceil(((to - from) - (lines * this.lineLength * 0.5)) / this.lineLength));
+          return this.lineHeight * lines;
       }
-      let topView = ContentView.get(node);
-      if (topView instanceof CompositionView)
-          topView = topView.widget.topView;
-      else if (topView)
-          topView.parent = null;
-      return Decoration.set(Decoration.replace({ widget: new CompositionWidget(node, textNode, topView), inclusive: true })
-          .range(newFrom, newTo));
-  }
-  class CompositionWidget extends WidgetType {
-      constructor(top, text, topView) {
-          super();
-          this.top = top;
-          this.text = text;
-          this.topView = topView;
+      heightForLine(length) {
+          if (!this.lineWrapping)
+              return this.lineHeight;
+          let lines = 1 + Math.max(0, Math.ceil((length - this.lineLength) / (this.lineLength - 5)));
+          return lines * this.lineHeight;
       }
-      eq(other) { return this.top == other.top && this.text == other.text; }
-      toDOM() { return this.top; }
-      ignoreEvent() { return false; }
-      get customView() { return CompositionView; }
-  }
-  function nearbyTextNode(node, offset, side) {
-      for (;;) {
-          if (node.nodeType == 3)
-              return node;
-          if (node.nodeType == 1 && offset > 0 && side <= 0) {
-              node = node.childNodes[offset - 1];
-              offset = maxOffset(node);
-          }
-          else if (node.nodeType == 1 && offset < node.childNodes.length && side >= 0) {
-              node = node.childNodes[offset];
-              offset = 0;
+      setDoc(doc) { this.doc = doc; return this; }
+      mustRefreshForWrapping(whiteSpace) {
+          return (wrappingWhiteSpace.indexOf(whiteSpace) > -1) != this.lineWrapping;
+      }
+      mustRefreshForHeights(lineHeights) {
+          let newHeight = false;
+          for (let i = 0; i < lineHeights.length; i++) {
+              let h = lineHeights[i];
+              if (h < 0) {
+                  i++;
+              }
+              else if (!this.heightSamples[Math.floor(h * 10)]) { // Round to .1 pixels
+                  newHeight = true;
+                  this.heightSamples[Math.floor(h * 10)] = true;
+              }
           }
-          else {
-              return null;
+          return newHeight;
+      }
+      refresh(whiteSpace, lineHeight, charWidth, textHeight, lineLength, knownHeights) {
+          let lineWrapping = wrappingWhiteSpace.indexOf(whiteSpace) > -1;
+          let changed = Math.round(lineHeight) != Math.round(this.lineHeight) || this.lineWrapping != lineWrapping;
+          this.lineWrapping = lineWrapping;
+          this.lineHeight = lineHeight;
+          this.charWidth = charWidth;
+          this.textHeight = textHeight;
+          this.lineLength = lineLength;
+          if (changed) {
+              this.heightSamples = {};
+              for (let i = 0; i < knownHeights.length; i++) {
+                  let h = knownHeights[i];
+                  if (h < 0)
+                      i++;
+                  else
+                      this.heightSamples[Math.floor(h * 10)] = true;
+              }
           }
+          return changed;
       }
   }
-  function nextToUneditable(node, offset) {
-      if (node.nodeType != 1)
-          return 0;
-      return (offset && node.childNodes[offset - 1].contentEditable == "false" ? 1 /* NextTo.Before */ : 0) |
-          (offset < node.childNodes.length && node.childNodes[offset].contentEditable == "false" ? 2 /* NextTo.After */ : 0);
-  }
-  class DecorationComparator$1 {
-      constructor() {
-          this.changes = [];
+  // This object is used by `updateHeight` to make DOM measurements
+  // arrive at the right nides. The `heights` array is a sequence of
+  // block heights, starting from position `from`.
+  class MeasuredHeights {
+      constructor(from, heights) {
+          this.from = from;
+          this.heights = heights;
+          this.index = 0;
       }
-      compareRange(from, to) { addRange(from, to, this.changes); }
-      comparePoint(from, to) { addRange(from, to, this.changes); }
-  }
-  function findChangedDeco(a, b, diff) {
-      let comp = new DecorationComparator$1;
-      RangeSet.compare(a, b, diff, comp);
-      return comp.changes;
+      get more() { return this.index < this.heights.length; }
   }
-  function inUneditable(node, inside) {
-      for (let cur = node; cur && cur != inside; cur = cur.assignedSlot || cur.parentNode) {
-          if (cur.nodeType == 1 && cur.contentEditable == 'false') {
-              return true;
-          }
+  /**
+  Record used to represent information about a block-level element
+  in the editor view.
+  */
+  class BlockInfo {
+      /**
+      @internal
+      */
+      constructor(
+      /**
+      The start of the element in the document.
+      */
+      from, 
+      /**
+      The length of the element.
+      */
+      length, 
+      /**
+      The top position of the element (relative to the top of the
+      document).
+      */
+      top, 
+      /**
+      Its height.
+      */
+      height, 
+      /**
+      @internal Weird packed field that holds an array of children
+      for composite blocks, a decoration for block widgets, and a
+      number indicating the amount of widget-create line breaks for
+      text blocks.
+      */
+      _content) {
+          this.from = from;
+          this.length = length;
+          this.top = top;
+          this.height = height;
+          this._content = _content;
       }
-      return false;
-  }
-
-  function groupAt(state, pos, bias = 1) {
-      let categorize = state.charCategorizer(pos);
-      let line = state.doc.lineAt(pos), linePos = pos - line.from;
-      if (line.length == 0)
-          return EditorSelection.cursor(pos);
-      if (linePos == 0)
-          bias = 1;
-      else if (linePos == line.length)
-          bias = -1;
-      let from = linePos, to = linePos;
-      if (bias < 0)
-          from = findClusterBreak(line.text, linePos, false);
-      else
-          to = findClusterBreak(line.text, linePos);
-      let cat = categorize(line.text.slice(from, to));
-      while (from > 0) {
-          let prev = findClusterBreak(line.text, from, false);
-          if (categorize(line.text.slice(prev, from)) != cat)
-              break;
-          from = prev;
+      /**
+      The type of element this is. When querying lines, this may be
+      an array of all the blocks that make up the line.
+      */
+      get type() {
+          return typeof this._content == "number" ? BlockType.Text :
+              Array.isArray(this._content) ? this._content : this._content.type;
       }
-      while (to < line.length) {
-          let next = findClusterBreak(line.text, to);
-          if (categorize(line.text.slice(to, next)) != cat)
-              break;
-          to = next;
+      /**
+      The end of the element as a document position.
+      */
+      get to() { return this.from + this.length; }
+      /**
+      The bottom position of the element.
+      */
+      get bottom() { return this.top + this.height; }
+      /**
+      If this is a widget block, this will return the widget
+      associated with it.
+      */
+      get widget() {
+          return this._content instanceof PointDecoration ? this._content.widget : null;
+      }
+      /**
+      If this is a textblock, this holds the number of line breaks
+      that appear in widgets inside the block.
+      */
+      get widgetLineBreaks() {
+          return typeof this._content == "number" ? this._content : 0;
+      }
+      /**
+      @internal
+      */
+      join(other) {
+          let content = (Array.isArray(this._content) ? this._content : [this])
+              .concat(Array.isArray(other._content) ? other._content : [other]);
+          return new BlockInfo(this.from, this.length + other.length, this.top, this.height + other.height, content);
       }
-      return EditorSelection.range(from + line.from, to + line.from);
-  }
-  // Search the DOM for the {node, offset} position closest to the given
-  // coordinates. Very inefficient and crude, but can usually be avoided
-  // by calling caret(Position|Range)FromPoint instead.
-  function getdx(x, rect) {
-      return rect.left > x ? rect.left - x : Math.max(0, x - rect.right);
-  }
-  function getdy(y, rect) {
-      return rect.top > y ? rect.top - y : Math.max(0, y - rect.bottom);
-  }
-  function yOverlap(a, b) {
-      return a.top < b.bottom - 1 && a.bottom > b.top + 1;
-  }
-  function upTop(rect, top) {
-      return top < rect.top ? { top, left: rect.left, right: rect.right, bottom: rect.bottom } : rect;
-  }
-  function upBot(rect, bottom) {
-      return bottom > rect.bottom ? { top: rect.top, left: rect.left, right: rect.right, bottom } : rect;
   }
-  function domPosAtCoords(parent, x, y) {
-      let closest, closestRect, closestX, closestY, closestOverlap = false;
-      let above, below, aboveRect, belowRect;
-      for (let child = parent.firstChild; child; child = child.nextSibling) {
-          let rects = clientRectsFor(child);
-          for (let i = 0; i < rects.length; i++) {
-              let rect = rects[i];
-              if (closestRect && yOverlap(closestRect, rect))
-                  rect = upTop(upBot(rect, closestRect.bottom), closestRect.top);
-              let dx = getdx(x, rect), dy = getdy(y, rect);
-              if (dx == 0 && dy == 0)
-                  return child.nodeType == 3 ? domPosInText(child, x, y) : domPosAtCoords(child, x, y);
-              if (!closest || closestY > dy || closestY == dy && closestX > dx) {
-                  closest = child;
-                  closestRect = rect;
-                  closestX = dx;
-                  closestY = dy;
-                  closestOverlap = !dx || (dx > 0 ? i < rects.length - 1 : i > 0);
+  var QueryType = /*@__PURE__*/(function (QueryType) {
+      QueryType[QueryType["ByPos"] = 0] = "ByPos";
+      QueryType[QueryType["ByHeight"] = 1] = "ByHeight";
+      QueryType[QueryType["ByPosNoHeight"] = 2] = "ByPosNoHeight";
+  return QueryType})(QueryType || (QueryType = {}));
+  const Epsilon = 1e-3;
+  class HeightMap {
+      constructor(length, // The number of characters covered
+      height, // Height of this part of the document
+      flags = 2 /* Outdated */) {
+          this.length = length;
+          this.height = height;
+          this.flags = flags;
+      }
+      get outdated() { return (this.flags & 2 /* Outdated */) > 0; }
+      set outdated(value) { this.flags = (value ? 2 /* Outdated */ : 0) | (this.flags & ~2 /* Outdated */); }
+      setHeight(oracle, height) {
+          if (this.height != height) {
+              if (Math.abs(this.height - height) > Epsilon)
+                  oracle.heightChanged = true;
+              this.height = height;
+          }
+      }
+      // Base case is to replace a leaf node, which simply builds a tree
+      // from the new nodes and returns that (HeightMapBranch and
+      // HeightMapGap override this to actually use from/to)
+      replace(_from, _to, nodes) {
+          return HeightMap.of(nodes);
+      }
+      // Again, these are base cases, and are overridden for branch and gap nodes.
+      decomposeLeft(_to, result) { result.push(this); }
+      decomposeRight(_from, result) { result.push(this); }
+      applyChanges(decorations, oldDoc, oracle, changes) {
+          let me = this, doc = oracle.doc;
+          for (let i = changes.length - 1; i >= 0; i--) {
+              let { fromA, toA, fromB, toB } = changes[i];
+              let start = me.lineAt(fromA, QueryType.ByPosNoHeight, oracle.setDoc(oldDoc), 0, 0);
+              let end = start.to >= toA ? start : me.lineAt(toA, QueryType.ByPosNoHeight, oracle, 0, 0);
+              toB += end.to - toA;
+              toA = end.to;
+              while (i > 0 && start.from <= changes[i - 1].toA) {
+                  fromA = changes[i - 1].fromA;
+                  fromB = changes[i - 1].fromB;
+                  i--;
+                  if (fromA < start.from)
+                      start = me.lineAt(fromA, QueryType.ByPosNoHeight, oracle, 0, 0);
               }
-              if (dx == 0) {
-                  if (y > rect.bottom && (!aboveRect || aboveRect.bottom < rect.bottom)) {
-                      above = child;
-                      aboveRect = rect;
+              fromB += start.from - fromA;
+              fromA = start.from;
+              let nodes = NodeBuilder.build(oracle.setDoc(doc), decorations, fromB, toB);
+              me = me.replace(fromA, toA, nodes);
+          }
+          return me.updateHeight(oracle, 0);
+      }
+      static empty() { return new HeightMapText(0, 0); }
+      // nodes uses null values to indicate the position of line breaks.
+      // There are never line breaks at the start or end of the array, or
+      // two line breaks next to each other, and the array isn't allowed
+      // to be empty (same restrictions as return value from the builder).
+      static of(nodes) {
+          if (nodes.length == 1)
+              return nodes[0];
+          let i = 0, j = nodes.length, before = 0, after = 0;
+          for (;;) {
+              if (i == j) {
+                  if (before > after * 2) {
+                      let split = nodes[i - 1];
+                      if (split.break)
+                          nodes.splice(--i, 1, split.left, null, split.right);
+                      else
+                          nodes.splice(--i, 1, split.left, split.right);
+                      j += 1 + split.break;
+                      before -= split.size;
                   }
-                  else if (y < rect.top && (!belowRect || belowRect.top > rect.top)) {
-                      below = child;
-                      belowRect = rect;
+                  else if (after > before * 2) {
+                      let split = nodes[j];
+                      if (split.break)
+                          nodes.splice(j, 1, split.left, null, split.right);
+                      else
+                          nodes.splice(j, 1, split.left, split.right);
+                      j += 2 + split.break;
+                      after -= split.size;
+                  }
+                  else {
+                      break;
                   }
               }
-              else if (aboveRect && yOverlap(aboveRect, rect)) {
-                  aboveRect = upBot(aboveRect, rect.bottom);
+              else if (before < after) {
+                  let next = nodes[i++];
+                  if (next)
+                      before += next.size;
               }
-              else if (belowRect && yOverlap(belowRect, rect)) {
-                  belowRect = upTop(belowRect, rect.top);
+              else {
+                  let next = nodes[--j];
+                  if (next)
+                      after += next.size;
               }
           }
+          let brk = 0;
+          if (nodes[i - 1] == null) {
+              brk = 1;
+              i--;
+          }
+          else if (nodes[i] == null) {
+              brk = 1;
+              j++;
+          }
+          return new HeightMapBranch(HeightMap.of(nodes.slice(0, i)), brk, HeightMap.of(nodes.slice(j)));
       }
-      if (aboveRect && aboveRect.bottom >= y) {
-          closest = above;
-          closestRect = aboveRect;
+  }
+  HeightMap.prototype.size = 1;
+  class HeightMapBlock extends HeightMap {
+      constructor(length, height, deco) {
+          super(length, height);
+          this.deco = deco;
       }
-      else if (belowRect && belowRect.top <= y) {
-          closest = below;
-          closestRect = belowRect;
+      blockAt(_height, _oracle, top, offset) {
+          return new BlockInfo(offset, this.length, top, this.height, this.deco || 0);
       }
-      if (!closest)
-          return { node: parent, offset: 0 };
-      let clipX = Math.max(closestRect.left, Math.min(closestRect.right, x));
-      if (closest.nodeType == 3)
-          return domPosInText(closest, clipX, y);
-      if (closestOverlap && closest.contentEditable != "false")
-          return domPosAtCoords(closest, clipX, y);
-      let offset = Array.prototype.indexOf.call(parent.childNodes, closest) +
-          (x >= (closestRect.left + closestRect.right) / 2 ? 1 : 0);
-      return { node: parent, offset };
-  }
-  function domPosInText(node, x, y) {
-      let len = node.nodeValue.length;
-      let closestOffset = -1, closestDY = 1e9, generalSide = 0;
-      for (let i = 0; i < len; i++) {
-          let rects = textRange(node, i, i + 1).getClientRects();
-          for (let j = 0; j < rects.length; j++) {
-              let rect = rects[j];
-              if (rect.top == rect.bottom)
-                  continue;
-              if (!generalSide)
-                  generalSide = x - rect.left;
-              let dy = (rect.top > y ? rect.top - y : y - rect.bottom) - 1;
-              if (rect.left - 1 <= x && rect.right + 1 >= x && dy < closestDY) {
-                  let right = x >= (rect.left + rect.right) / 2, after = right;
-                  if (browser.chrome || browser.gecko) {
-                      // Check for RTL on browsers that support getting client
-                      // rects for empty ranges.
-                      let rectBefore = textRange(node, i).getBoundingClientRect();
-                      if (rectBefore.left == rect.right)
-                          after = !right;
-                  }
-                  if (dy <= 0)
-                      return { node, offset: i + (after ? 1 : 0) };
-                  closestOffset = i + (after ? 1 : 0);
-                  closestDY = dy;
-              }
-          }
+      lineAt(_value, _type, oracle, top, offset) {
+          return this.blockAt(0, oracle, top, offset);
       }
-      return { node, offset: closestOffset > -1 ? closestOffset : generalSide > 0 ? node.nodeValue.length : 0 };
+      forEachLine(from, to, oracle, top, offset, f) {
+          if (from <= offset + this.length && to >= offset)
+              f(this.blockAt(0, oracle, top, offset));
+      }
+      updateHeight(oracle, offset = 0, _force = false, measured) {
+          if (measured && measured.from <= offset && measured.more)
+              this.setHeight(oracle, measured.heights[measured.index++]);
+          this.outdated = false;
+          return this;
+      }
+      toString() { return `block(${this.length})`; }
   }
-  function posAtCoords(view, { x, y }, precise, bias = -1) {
-      var _a;
-      let content = view.contentDOM.getBoundingClientRect(), docTop = content.top + view.viewState.paddingTop;
-      let block, { docHeight } = view.viewState;
-      let yOffset = y - docTop;
-      if (yOffset < 0)
-          return 0;
-      if (yOffset > docHeight)
-          return view.state.doc.length;
-      // Scan for a text block near the queried y position
-      for (let halfLine = view.defaultLineHeight / 2, bounced = false;;) {
-          block = view.elementAtHeight(yOffset);
-          if (block.type == BlockType.Text)
-              break;
-          for (;;) {
-              // Move the y position out of this block
-              yOffset = bias > 0 ? block.bottom + halfLine : block.top - halfLine;
-              if (yOffset >= 0 && yOffset <= docHeight)
-                  break;
-              // If the document consists entirely of replaced widgets, we
-              // won't find a text block, so return 0
-              if (bounced)
-                  return precise ? null : 0;
-              bounced = true;
-              bias = -bias;
-          }
+  class HeightMapText extends HeightMapBlock {
+      constructor(length, height) {
+          super(length, height, null);
+          this.collapsed = 0; // Amount of collapsed content in the line
+          this.widgetHeight = 0; // Maximum inline widget height
+          this.breaks = 0; // Number of widget-introduced line breaks on the line
       }
-      y = docTop + yOffset;
-      let lineStart = block.from;
-      // If this is outside of the rendered viewport, we can't determine a position
-      if (lineStart < view.viewport.from)
-          return view.viewport.from == 0 ? 0 : precise ? null : posAtCoordsImprecise(view, content, block, x, y);
-      if (lineStart > view.viewport.to)
-          return view.viewport.to == view.state.doc.length ? view.state.doc.length :
-              precise ? null : posAtCoordsImprecise(view, content, block, x, y);
-      // Prefer ShadowRootOrDocument.elementFromPoint if present, fall back to document if not
-      let doc = view.dom.ownerDocument;
-      let root = view.root.elementFromPoint ? view.root : doc;
-      let element = root.elementFromPoint(x, y);
-      if (element && !view.contentDOM.contains(element))
-          element = null;
-      // If the element is unexpected, clip x at the sides of the content area and try again
-      if (!element) {
-          x = Math.max(content.left + 1, Math.min(content.right - 1, x));
-          element = root.elementFromPoint(x, y);
-          if (element && !view.contentDOM.contains(element))
-              element = null;
+      blockAt(_height, _oracle, top, offset) {
+          return new BlockInfo(offset, this.length, top, this.height, this.breaks);
       }
-      // There's visible editor content under the point, so we can try
-      // using caret(Position|Range)FromPoint as a shortcut
-      let node, offset = -1;
-      if (element && ((_a = view.docView.nearest(element)) === null || _a === void 0 ? void 0 : _a.isEditable) != false) {
-          if (doc.caretPositionFromPoint) {
-              let pos = doc.caretPositionFromPoint(x, y);
-              if (pos)
-                  ({ offsetNode: node, offset } = pos);
+      replace(_from, _to, nodes) {
+          let node = nodes[0];
+          if (nodes.length == 1 && (node instanceof HeightMapText || node instanceof HeightMapGap && (node.flags & 4 /* SingleLine */)) &&
+              Math.abs(this.length - node.length) < 10) {
+              if (node instanceof HeightMapGap)
+                  node = new HeightMapText(node.length, this.height);
+              else
+                  node.height = this.height;
+              if (!this.outdated)
+                  node.outdated = false;
+              return node;
           }
-          else if (doc.caretRangeFromPoint) {
-              let range = doc.caretRangeFromPoint(x, y);
-              if (range) {
-                  ({ startContainer: node, startOffset: offset } = range);
-                  if (!view.contentDOM.contains(node) ||
-                      browser.safari && isSuspiciousSafariCaretResult(node, offset, x) ||
-                      browser.chrome && isSuspiciousChromeCaretResult(node, offset, x))
-                      node = undefined;
-              }
+          else {
+              return HeightMap.of(nodes);
           }
       }
-      // No luck, do our own (potentially expensive) search
-      if (!node || !view.docView.dom.contains(node)) {
-          let line = LineView.find(view.docView, lineStart);
-          if (!line)
-              return yOffset > block.top + block.height / 2 ? block.to : block.from;
-          ({ node, offset } = domPosAtCoords(line.dom, x, y));
-      }
-      return view.docView.posFromDOM(node, offset);
-  }
-  function posAtCoordsImprecise(view, contentRect, block, x, y) {
-      let into = Math.round((x - contentRect.left) * view.defaultCharacterWidth);
-      if (view.lineWrapping && block.height > view.defaultLineHeight * 1.5) {
-          let line = Math.floor((y - block.top) / view.defaultLineHeight);
-          into += line * view.viewState.heightOracle.lineLength;
-      }
-      let content = view.state.sliceDoc(block.from, block.to);
-      return block.from + findColumn(content, into, view.state.tabSize);
-  }
-  // In case of a high line height, Safari's caretRangeFromPoint treats
-  // the space between lines as belonging to the last character of the
-  // line before. This is used to detect such a result so that it can be
-  // ignored (issue #401).
-  function isSuspiciousSafariCaretResult(node, offset, x) {
-      let len;
-      if (node.nodeType != 3 || offset != (len = node.nodeValue.length))
-          return false;
-      for (let next = node.nextSibling; next; next = next.nextSibling)
-          if (next.nodeType != 1 || next.nodeName != "BR")
-              return false;
-      return textRange(node, len - 1, len).getBoundingClientRect().left > x;
-  }
-  // Chrome will move positions between lines to the start of the next line
-  function isSuspiciousChromeCaretResult(node, offset, x) {
-      if (offset != 0)
-          return false;
-      for (let cur = node;;) {
-          let parent = cur.parentNode;
-          if (!parent || parent.nodeType != 1 || parent.firstChild != cur)
-              return false;
-          if (parent.classList.contains("cm-line"))
-              break;
-          cur = parent;
+      updateHeight(oracle, offset = 0, force = false, measured) {
+          if (measured && measured.from <= offset && measured.more)
+              this.setHeight(oracle, measured.heights[measured.index++]);
+          else if (force || this.outdated)
+              this.setHeight(oracle, Math.max(this.widgetHeight, oracle.heightForLine(this.length - this.collapsed)) +
+                  this.breaks * oracle.lineHeight);
+          this.outdated = false;
+          return this;
       }
-      let rect = node.nodeType == 1 ? node.getBoundingClientRect()
-          : textRange(node, 0, Math.max(node.nodeValue.length, 1)).getBoundingClientRect();
-      return x - rect.left > 5;
-  }
-  function moveToLineBoundary(view, start, forward, includeWrap) {
-      let line = view.state.doc.lineAt(start.head);
-      let coords = !includeWrap || !view.lineWrapping ? null
-          : view.coordsAtPos(start.assoc < 0 && start.head > line.from ? start.head - 1 : start.head);
-      if (coords) {
-          let editorRect = view.dom.getBoundingClientRect();
-          let direction = view.textDirectionAt(line.from);
-          let pos = view.posAtCoords({ x: forward == (direction == Direction.LTR) ? editorRect.right - 1 : editorRect.left + 1,
-              y: (coords.top + coords.bottom) / 2 });
-          if (pos != null)
-              return EditorSelection.cursor(pos, forward ? -1 : 1);
+      toString() {
+          return `line(${this.length}${this.collapsed ? -this.collapsed : ""}${this.widgetHeight ? ":" + this.widgetHeight : ""})`;
       }
-      let lineView = LineView.find(view.docView, start.head);
-      let end = lineView ? (forward ? lineView.posAtEnd : lineView.posAtStart) : (forward ? line.to : line.from);
-      return EditorSelection.cursor(end, forward ? -1 : 1);
   }
-  function moveByChar(view, start, forward, by) {
-      let line = view.state.doc.lineAt(start.head), spans = view.bidiSpans(line);
-      let direction = view.textDirectionAt(line.from);
-      for (let cur = start, check = null;;) {
-          let next = moveVisually(line, spans, direction, cur, forward), char = movedOver;
-          if (!next) {
-              if (line.number == (forward ? view.state.doc.lines : 1))
-                  return cur;
-              char = "\n";
-              line = view.state.doc.line(line.number + (forward ? 1 : -1));
-              spans = view.bidiSpans(line);
-              next = EditorSelection.cursor(forward ? line.from : line.to);
+  class HeightMapGap extends HeightMap {
+      constructor(length) { super(length, 0); }
+      heightMetrics(oracle, offset) {
+          let firstLine = oracle.doc.lineAt(offset).number, lastLine = oracle.doc.lineAt(offset + this.length).number;
+          let lines = lastLine - firstLine + 1;
+          let perLine, perChar = 0;
+          if (oracle.lineWrapping) {
+              let totalPerLine = Math.min(this.height, oracle.lineHeight * lines);
+              perLine = totalPerLine / lines;
+              if (this.length > lines + 1)
+                  perChar = (this.height - totalPerLine) / (this.length - lines - 1);
           }
-          if (!check) {
-              if (!by)
-                  return next;
-              check = by(char);
+          else {
+              perLine = this.height / lines;
           }
-          else if (!check(char)) {
-              return cur;
+          return { firstLine, lastLine, perLine, perChar };
+      }
+      blockAt(height, oracle, top, offset) {
+          let { firstLine, lastLine, perLine, perChar } = this.heightMetrics(oracle, offset);
+          if (oracle.lineWrapping) {
+              let guess = offset + Math.round(Math.max(0, Math.min(1, (height - top) / this.height)) * this.length);
+              let line = oracle.doc.lineAt(guess), lineHeight = perLine + line.length * perChar;
+              let lineTop = Math.max(top, height - lineHeight / 2);
+              return new BlockInfo(line.from, line.length, lineTop, lineHeight, 0);
+          }
+          else {
+              let line = Math.max(0, Math.min(lastLine - firstLine, Math.floor((height - top) / perLine)));
+              let { from, length } = oracle.doc.line(firstLine + line);
+              return new BlockInfo(from, length, top + perLine * line, perLine, 0);
           }
-          cur = next;
       }
-  }
-  function byGroup(view, pos, start) {
-      let categorize = view.state.charCategorizer(pos);
-      let cat = categorize(start);
-      return (next) => {
-          let nextCat = categorize(next);
-          if (cat == CharCategory.Space)
-              cat = nextCat;
-          return cat == nextCat;
-      };
-  }
-  function moveVertically(view, start, forward, distance) {
-      let startPos = start.head, dir = forward ? 1 : -1;
-      if (startPos == (forward ? view.state.doc.length : 0))
-          return EditorSelection.cursor(startPos, start.assoc);
-      let goal = start.goalColumn, startY;
-      let rect = view.contentDOM.getBoundingClientRect();
-      let startCoords = view.coordsAtPos(startPos), docTop = view.documentTop;
-      if (startCoords) {
-          if (goal == null)
-              goal = startCoords.left - rect.left;
-          startY = dir < 0 ? startCoords.top : startCoords.bottom;
+      lineAt(value, type, oracle, top, offset) {
+          if (type == QueryType.ByHeight)
+              return this.blockAt(value, oracle, top, offset);
+          if (type == QueryType.ByPosNoHeight) {
+              let { from, to } = oracle.doc.lineAt(value);
+              return new BlockInfo(from, to - from, 0, 0, 0);
+          }
+          let { firstLine, perLine, perChar } = this.heightMetrics(oracle, offset);
+          let line = oracle.doc.lineAt(value), lineHeight = perLine + line.length * perChar;
+          let linesAbove = line.number - firstLine;
+          let lineTop = top + perLine * linesAbove + perChar * (line.from - offset - linesAbove);
+          return new BlockInfo(line.from, line.length, Math.max(top, Math.min(lineTop, top + this.height - lineHeight)), lineHeight, 0);
+      }
+      forEachLine(from, to, oracle, top, offset, f) {
+          from = Math.max(from, offset);
+          to = Math.min(to, offset + this.length);
+          let { firstLine, perLine, perChar } = this.heightMetrics(oracle, offset);
+          for (let pos = from, lineTop = top; pos <= to;) {
+              let line = oracle.doc.lineAt(pos);
+              if (pos == from) {
+                  let linesAbove = line.number - firstLine;
+                  lineTop += perLine * linesAbove + perChar * (from - offset - linesAbove);
+              }
+              let lineHeight = perLine + perChar * line.length;
+              f(new BlockInfo(line.from, line.length, lineTop, lineHeight, 0));
+              lineTop += lineHeight;
+              pos = line.to + 1;
+          }
       }
-      else {
-          let line = view.viewState.lineBlockAt(startPos);
-          if (goal == null)
-              goal = Math.min(rect.right - rect.left, view.defaultCharacterWidth * (startPos - line.from));
-          startY = (dir < 0 ? line.top : line.bottom) + docTop;
+      replace(from, to, nodes) {
+          let after = this.length - to;
+          if (after > 0) {
+              let last = nodes[nodes.length - 1];
+              if (last instanceof HeightMapGap)
+                  nodes[nodes.length - 1] = new HeightMapGap(last.length + after);
+              else
+                  nodes.push(null, new HeightMapGap(after - 1));
+          }
+          if (from > 0) {
+              let first = nodes[0];
+              if (first instanceof HeightMapGap)
+                  nodes[0] = new HeightMapGap(from + first.length);
+              else
+                  nodes.unshift(new HeightMapGap(from - 1), null);
+          }
+          return HeightMap.of(nodes);
       }
-      let resolvedGoal = rect.left + goal;
-      let dist = distance !== null && distance !== void 0 ? distance : (view.defaultLineHeight >> 1);
-      for (let extra = 0;; extra += 10) {
-          let curY = startY + (dist + extra) * dir;
-          let pos = posAtCoords(view, { x: resolvedGoal, y: curY }, false, dir);
-          if (curY < rect.top || curY > rect.bottom || (dir < 0 ? pos < startPos : pos > startPos))
-              return EditorSelection.cursor(pos, start.assoc, undefined, goal);
+      decomposeLeft(to, result) {
+          result.push(new HeightMapGap(to - 1), null);
       }
-  }
-  function skipAtoms(view, oldPos, pos) {
-      let atoms = view.state.facet(atomicRanges).map(f => f(view));
-      for (;;) {
-          let moved = false;
-          for (let set of atoms) {
-              set.between(pos.from - 1, pos.from + 1, (from, to, value) => {
-                  if (pos.from > from && pos.from < to) {
-                      pos = oldPos.head > pos.from ? EditorSelection.cursor(from, 1) : EditorSelection.cursor(to, -1);
-                      moved = true;
-                  }
-              });
-          }
-          if (!moved)
-              return pos;
+      decomposeRight(from, result) {
+          result.push(null, new HeightMapGap(this.length - from - 1));
       }
-  }
-
-  // This will also be where dragging info and such goes
-  class InputState {
-      constructor(view) {
-          this.lastKeyCode = 0;
-          this.lastKeyTime = 0;
-          this.lastTouchTime = 0;
-          this.lastFocusTime = 0;
-          this.lastScrollTop = 0;
-          this.lastScrollLeft = 0;
-          this.chromeScrollHack = -1;
-          // On iOS, some keys need to have their default behavior happen
-          // (after which we retroactively handle them and reset the DOM) to
-          // avoid messing up the virtual keyboard state.
-          this.pendingIOSKey = undefined;
-          this.lastSelectionOrigin = null;
-          this.lastSelectionTime = 0;
-          this.lastEscPress = 0;
-          this.lastContextMenu = 0;
-          this.scrollHandlers = [];
-          this.registeredEvents = [];
-          this.customHandlers = [];
-          // -1 means not in a composition. Otherwise, this counts the number
-          // of changes made during the composition. The count is used to
-          // avoid treating the start state of the composition, before any
-          // changes have been made, as part of the composition.
-          this.composing = -1;
-          // Tracks whether the next change should be marked as starting the
-          // composition (null means no composition, true means next is the
-          // first, false means first has already been marked for this
-          // composition)
-          this.compositionFirstChange = null;
-          this.compositionEndedAt = 0;
-          this.mouseSelection = null;
-          for (let type in handlers) {
-              let handler = handlers[type];
-              view.contentDOM.addEventListener(type, (event) => {
-                  if (!eventBelongsToEditor(view, event) || this.ignoreDuringComposition(event))
-                      return;
-                  if (type == "keydown" && this.keydown(view, event))
-                      return;
-                  if (this.mustFlushObserver(event))
-                      view.observer.forceFlush();
-                  if (this.runCustomHandlers(type, view, event))
-                      event.preventDefault();
-                  else
-                      handler(view, event);
-              }, handlerOptions[type]);
-              this.registeredEvents.push(type);
+      updateHeight(oracle, offset = 0, force = false, measured) {
+          let end = offset + this.length;
+          if (measured && measured.from <= offset + this.length && measured.more) {
+              // Fill in part of this gap with measured lines. We know there
+              // can't be widgets or collapsed ranges in those lines, because
+              // they would already have been added to the heightmap (gaps
+              // only contain plain text).
+              let nodes = [], pos = Math.max(offset, measured.from), singleHeight = -1;
+              if (measured.from > offset)
+                  nodes.push(new HeightMapGap(measured.from - offset - 1).updateHeight(oracle, offset));
+              while (pos <= end && measured.more) {
+                  let len = oracle.doc.lineAt(pos).length;
+                  if (nodes.length)
+                      nodes.push(null);
+                  let height = measured.heights[measured.index++];
+                  if (singleHeight == -1)
+                      singleHeight = height;
+                  else if (Math.abs(height - singleHeight) >= Epsilon)
+                      singleHeight = -2;
+                  let line = new HeightMapText(len, height);
+                  line.outdated = false;
+                  nodes.push(line);
+                  pos += len + 1;
+              }
+              if (pos <= end)
+                  nodes.push(null, new HeightMapGap(end - pos).updateHeight(oracle, pos));
+              let result = HeightMap.of(nodes);
+              if (singleHeight < 0 || Math.abs(result.height - this.height) >= Epsilon ||
+                  Math.abs(singleHeight - this.heightMetrics(oracle, offset).perLine) >= Epsilon)
+                  oracle.heightChanged = true;
+              return result;
           }
-          if (browser.chrome && browser.chrome_version == 102) { // FIXME remove at some point
-              // On Chrome 102, viewport updates somehow stop wheel-based
-              // scrolling. Turning off pointer events during the scroll seems
-              // to avoid the issue.
-              view.scrollDOM.addEventListener("wheel", () => {
-                  if (this.chromeScrollHack < 0)
-                      view.contentDOM.style.pointerEvents = "none";
-                  else
-                      window.clearTimeout(this.chromeScrollHack);
-                  this.chromeScrollHack = setTimeout(() => {
-                      this.chromeScrollHack = -1;
-                      view.contentDOM.style.pointerEvents = "";
-                  }, 100);
-              }, { passive: true });
+          else if (force || this.outdated) {
+              this.setHeight(oracle, oracle.heightForGap(offset, offset + this.length));
+              this.outdated = false;
           }
-          this.notifiedFocused = view.hasFocus;
-          // On Safari adding an input event handler somehow prevents an
-          // issue where the composition vanishes when you press enter.
-          if (browser.safari)
-              view.contentDOM.addEventListener("input", () => null);
+          return this;
       }
-      setSelectionOrigin(origin) {
-          this.lastSelectionOrigin = origin;
-          this.lastSelectionTime = Date.now();
+      toString() { return `gap(${this.length})`; }
+  }
+  class HeightMapBranch extends HeightMap {
+      constructor(left, brk, right) {
+          super(left.length + brk + right.length, left.height + right.height, brk | (left.outdated || right.outdated ? 2 /* Outdated */ : 0));
+          this.left = left;
+          this.right = right;
+          this.size = left.size + right.size;
       }
-      ensureHandlers(view, plugins) {
-          var _a;
-          let handlers;
-          this.customHandlers = [];
-          for (let plugin of plugins)
-              if (handlers = (_a = plugin.update(view).spec) === null || _a === void 0 ? void 0 : _a.domEventHandlers) {
-                  this.customHandlers.push({ plugin: plugin.value, handlers });
-                  for (let type in handlers)
-                      if (this.registeredEvents.indexOf(type) < 0 && type != "scroll") {
-                          this.registeredEvents.push(type);
-                          view.contentDOM.addEventListener(type, (event) => {
-                              if (!eventBelongsToEditor(view, event))
-                                  return;
-                              if (this.runCustomHandlers(type, view, event))
-                                  event.preventDefault();
-                          });
-                      }
-              }
+      get break() { return this.flags & 1 /* Break */; }
+      blockAt(height, oracle, top, offset) {
+          let mid = top + this.left.height;
+          return height < mid ? this.left.blockAt(height, oracle, top, offset)
+              : this.right.blockAt(height, oracle, mid, offset + this.left.length + this.break);
       }
-      runCustomHandlers(type, view, event) {
-          for (let set of this.customHandlers) {
-              let handler = set.handlers[type];
-              if (handler) {
-                  try {
-                      if (handler.call(set.plugin, event, view) || event.defaultPrevented)
-                          return true;
-                  }
-                  catch (e) {
-                      logException(view.state, e);
-                  }
-              }
-          }
-          return false;
+      lineAt(value, type, oracle, top, offset) {
+          let rightTop = top + this.left.height, rightOffset = offset + this.left.length + this.break;
+          let left = type == QueryType.ByHeight ? value < rightTop : value < rightOffset;
+          let base = left ? this.left.lineAt(value, type, oracle, top, offset)
+              : this.right.lineAt(value, type, oracle, rightTop, rightOffset);
+          if (this.break || (left ? base.to < rightOffset : base.from > rightOffset))
+              return base;
+          let subQuery = type == QueryType.ByPosNoHeight ? QueryType.ByPosNoHeight : QueryType.ByPos;
+          if (left)
+              return base.join(this.right.lineAt(rightOffset, subQuery, oracle, rightTop, rightOffset));
+          else
+              return this.left.lineAt(rightOffset, subQuery, oracle, top, offset).join(base);
       }
-      runScrollHandlers(view, event) {
-          this.lastScrollTop = view.scrollDOM.scrollTop;
-          this.lastScrollLeft = view.scrollDOM.scrollLeft;
-          for (let set of this.customHandlers) {
-              let handler = set.handlers.scroll;
-              if (handler) {
-                  try {
-                      handler.call(set.plugin, event, view);
-                  }
-                  catch (e) {
-                      logException(view.state, e);
-                  }
-              }
+      forEachLine(from, to, oracle, top, offset, f) {
+          let rightTop = top + this.left.height, rightOffset = offset + this.left.length + this.break;
+          if (this.break) {
+              if (from < rightOffset)
+                  this.left.forEachLine(from, to, oracle, top, offset, f);
+              if (to >= rightOffset)
+                  this.right.forEachLine(from, to, oracle, rightTop, rightOffset, f);
+          }
+          else {
+              let mid = this.lineAt(rightOffset, QueryType.ByPos, oracle, top, offset);
+              if (from < mid.from)
+                  this.left.forEachLine(from, mid.from - 1, oracle, top, offset, f);
+              if (mid.to >= from && mid.from <= to)
+                  f(mid);
+              if (to > mid.to)
+                  this.right.forEachLine(mid.to + 1, to, oracle, rightTop, rightOffset, f);
           }
       }
-      keydown(view, event) {
-          // Must always run, even if a custom handler handled the event
-          this.lastKeyCode = event.keyCode;
-          this.lastKeyTime = Date.now();
-          if (event.keyCode == 9 && Date.now() < this.lastEscPress + 2000)
-              return true;
-          // Chrome for Android usually doesn't fire proper key events, but
-          // occasionally does, usually surrounded by a bunch of complicated
-          // composition changes. When an enter or backspace key event is
-          // seen, hold off on handling DOM events for a bit, and then
-          // dispatch it.
-          if (browser.android && browser.chrome && !event.synthetic &&
-              (event.keyCode == 13 || event.keyCode == 8)) {
-              view.observer.delayAndroidKey(event.key, event.keyCode);
-              return true;
+      replace(from, to, nodes) {
+          let rightStart = this.left.length + this.break;
+          if (to < rightStart)
+              return this.balanced(this.left.replace(from, to, nodes), this.right);
+          if (from > this.left.length)
+              return this.balanced(this.left, this.right.replace(from - rightStart, to - rightStart, nodes));
+          let result = [];
+          if (from > 0)
+              this.decomposeLeft(from, result);
+          let left = result.length;
+          for (let node of nodes)
+              result.push(node);
+          if (from > 0)
+              mergeGaps(result, left - 1);
+          if (to < this.length) {
+              let right = result.length;
+              this.decomposeRight(to, result);
+              mergeGaps(result, right);
           }
-          // Prevent the default behavior of Enter on iOS makes the
-          // virtual keyboard get stuck in the wrong (lowercase)
-          // state. So we let it go through, and then, in
-          // applyDOMChange, notify key handlers of it and reset to
-          // the state they produce.
-          let pending;
-          if (browser.ios && !event.synthetic && !event.altKey && !event.metaKey &&
-              ((pending = PendingKeys.find(key => key.keyCode == event.keyCode)) && !event.ctrlKey ||
-                  EmacsyPendingKeys.indexOf(event.key) > -1 && event.ctrlKey && !event.shiftKey)) {
-              this.pendingIOSKey = pending || event;
-              setTimeout(() => this.flushIOSKey(view), 250);
-              return true;
+          return HeightMap.of(result);
+      }
+      decomposeLeft(to, result) {
+          let left = this.left.length;
+          if (to <= left)
+              return this.left.decomposeLeft(to, result);
+          result.push(this.left);
+          if (this.break) {
+              left++;
+              if (to >= left)
+                  result.push(null);
           }
-          return false;
+          if (to > left)
+              this.right.decomposeLeft(to - left, result);
       }
-      flushIOSKey(view) {
-          let key = this.pendingIOSKey;
-          if (!key)
-              return false;
-          this.pendingIOSKey = undefined;
-          return dispatchKey(view.contentDOM, key.key, key.keyCode);
+      decomposeRight(from, result) {
+          let left = this.left.length, right = left + this.break;
+          if (from >= right)
+              return this.right.decomposeRight(from - right, result);
+          if (from < left)
+              this.left.decomposeRight(from, result);
+          if (this.break && from < right)
+              result.push(null);
+          result.push(this.right);
       }
-      ignoreDuringComposition(event) {
-          if (!/^key/.test(event.type))
-              return false;
-          if (this.composing > 0)
-              return true;
-          // See https://www.stum.de/2016/06/24/handling-ime-events-in-javascript/.
-          // On some input method editors (IMEs), the Enter key is used to
-          // confirm character selection. On Safari, when Enter is pressed,
-          // compositionend and keydown events are sometimes emitted in the
-          // wrong order. The key event should still be ignored, even when
-          // it happens after the compositionend event.
-          if (browser.safari && !browser.ios && Date.now() - this.compositionEndedAt < 100) {
-              this.compositionEndedAt = 0;
-              return true;
-          }
-          return false;
+      balanced(left, right) {
+          if (left.size > 2 * right.size || right.size > 2 * left.size)
+              return HeightMap.of(this.break ? [left, null, right] : [left, right]);
+          this.left = left;
+          this.right = right;
+          this.height = left.height + right.height;
+          this.outdated = left.outdated || right.outdated;
+          this.size = left.size + right.size;
+          this.length = left.length + this.break + right.length;
+          return this;
       }
-      mustFlushObserver(event) {
-          return event.type == "keydown" && event.keyCode != 229;
+      updateHeight(oracle, offset = 0, force = false, measured) {
+          let { left, right } = this, rightStart = offset + left.length + this.break, rebalance = null;
+          if (measured && measured.from <= offset + left.length && measured.more)
+              rebalance = left = left.updateHeight(oracle, offset, force, measured);
+          else
+              left.updateHeight(oracle, offset, force);
+          if (measured && measured.from <= rightStart + right.length && measured.more)
+              rebalance = right = right.updateHeight(oracle, rightStart, force, measured);
+          else
+              right.updateHeight(oracle, rightStart, force);
+          if (rebalance)
+              return this.balanced(left, right);
+          this.height = this.left.height + this.right.height;
+          this.outdated = false;
+          return this;
       }
-      startMouseSelection(mouseSelection) {
-          if (this.mouseSelection)
-              this.mouseSelection.destroy();
-          this.mouseSelection = mouseSelection;
+      toString() { return this.left + (this.break ? " " : "-") + this.right; }
+  }
+  function mergeGaps(nodes, around) {
+      let before, after;
+      if (nodes[around] == null &&
+          (before = nodes[around - 1]) instanceof HeightMapGap &&
+          (after = nodes[around + 1]) instanceof HeightMapGap)
+          nodes.splice(around - 1, 3, new HeightMapGap(before.length + 1 + after.length));
+  }
+  const relevantWidgetHeight = 5;
+  class NodeBuilder {
+      constructor(pos, oracle) {
+          this.pos = pos;
+          this.oracle = oracle;
+          this.nodes = [];
+          this.lineStart = -1;
+          this.lineEnd = -1;
+          this.covering = null;
+          this.writtenTo = pos;
       }
-      update(update) {
-          if (this.mouseSelection)
-              this.mouseSelection.update(update);
-          if (update.transactions.length)
-              this.lastKeyCode = this.lastSelectionTime = 0;
+      get isCovered() {
+          return this.covering && this.nodes[this.nodes.length - 1] == this.covering;
       }
-      destroy() {
-          if (this.mouseSelection)
-              this.mouseSelection.destroy();
+      span(_from, to) {
+          if (this.lineStart > -1) {
+              let end = Math.min(to, this.lineEnd), last = this.nodes[this.nodes.length - 1];
+              if (last instanceof HeightMapText)
+                  last.length += end - this.pos;
+              else if (end > this.pos || !this.isCovered)
+                  this.nodes.push(new HeightMapText(end - this.pos, -1));
+              this.writtenTo = end;
+              if (to > end) {
+                  this.nodes.push(null);
+                  this.writtenTo++;
+                  this.lineStart = -1;
+              }
+          }
+          this.pos = to;
       }
-  }
-  const PendingKeys = [
-      { key: "Backspace", keyCode: 8, inputType: "deleteContentBackward" },
-      { key: "Enter", keyCode: 13, inputType: "insertParagraph" },
-      { key: "Delete", keyCode: 46, inputType: "deleteContentForward" }
-  ];
-  const EmacsyPendingKeys = "dthko";
-  // Key codes for modifier keys
-  const modifierCodes = [16, 17, 18, 20, 91, 92, 224, 225];
-  class MouseSelection {
-      constructor(view, startEvent, style, mustSelect) {
-          this.view = view;
-          this.style = style;
-          this.mustSelect = mustSelect;
-          this.lastEvent = startEvent;
-          let doc = view.contentDOM.ownerDocument;
-          doc.addEventListener("mousemove", this.move = this.move.bind(this));
-          doc.addEventListener("mouseup", this.up = this.up.bind(this));
-          this.extend = startEvent.shiftKey;
-          this.multiple = view.state.facet(EditorState.allowMultipleSelections) && addsSelectionRange(view, startEvent);
-          this.dragMove = dragMovesSelection(view, startEvent);
-          this.dragging = isInPrimarySelection(view, startEvent) && getClickType(startEvent) == 1 ? null : false;
-          // When clicking outside of the selection, immediately apply the
-          // effect of starting the selection
-          if (this.dragging === false) {
-              startEvent.preventDefault();
-              this.select(startEvent);
+      point(from, to, deco) {
+          if (from < to || deco.heightRelevant) {
+              let height = deco.widget ? deco.widget.estimatedHeight : 0;
+              let breaks = deco.widget ? deco.widget.lineBreaks : 0;
+              if (height < 0)
+                  height = this.oracle.lineHeight;
+              let len = to - from;
+              if (deco.block) {
+                  this.addBlock(new HeightMapBlock(len, height, deco));
+              }
+              else if (len || breaks || height >= relevantWidgetHeight) {
+                  this.addLineDeco(height, breaks, len);
+              }
+          }
+          else if (to > from) {
+              this.span(from, to);
           }
+          if (this.lineEnd > -1 && this.lineEnd < this.pos)
+              this.lineEnd = this.oracle.doc.lineAt(this.pos).to;
       }
-      move(event) {
-          if (event.buttons == 0)
-              return this.destroy();
-          if (this.dragging !== false)
+      enterLine() {
+          if (this.lineStart > -1)
               return;
-          this.select(this.lastEvent = event);
+          let { from, to } = this.oracle.doc.lineAt(this.pos);
+          this.lineStart = from;
+          this.lineEnd = to;
+          if (this.writtenTo < from) {
+              if (this.writtenTo < from - 1 || this.nodes[this.nodes.length - 1] == null)
+                  this.nodes.push(this.blankContent(this.writtenTo, from - 1));
+              this.nodes.push(null);
+          }
+          if (this.pos > from)
+              this.nodes.push(new HeightMapText(this.pos - from, -1));
+          this.writtenTo = this.pos;
       }
-      up(event) {
-          if (this.dragging == null)
-              this.select(this.lastEvent);
-          if (!this.dragging)
-              event.preventDefault();
-          this.destroy();
+      blankContent(from, to) {
+          let gap = new HeightMapGap(to - from);
+          if (this.oracle.doc.lineAt(from).to == to)
+              gap.flags |= 4 /* SingleLine */;
+          return gap;
       }
-      destroy() {
-          let doc = this.view.contentDOM.ownerDocument;
-          doc.removeEventListener("mousemove", this.move);
-          doc.removeEventListener("mouseup", this.up);
-          this.view.inputState.mouseSelection = null;
+      ensureLine() {
+          this.enterLine();
+          let last = this.nodes.length ? this.nodes[this.nodes.length - 1] : null;
+          if (last instanceof HeightMapText)
+              return last;
+          let line = new HeightMapText(0, -1);
+          this.nodes.push(line);
+          return line;
       }
-      select(event) {
-          let selection = this.style.get(event, this.extend, this.multiple);
-          if (this.mustSelect || !selection.eq(this.view.state.selection) ||
-              selection.main.assoc != this.view.state.selection.main.assoc)
-              this.view.dispatch({
-                  selection,
-                  userEvent: "select.pointer",
-                  scrollIntoView: true
-              });
-          this.mustSelect = false;
+      addBlock(block) {
+          var _a;
+          this.enterLine();
+          let type = (_a = block.deco) === null || _a === void 0 ? void 0 : _a.type;
+          if (type == BlockType.WidgetAfter && !this.isCovered)
+              this.ensureLine();
+          this.nodes.push(block);
+          this.writtenTo = this.pos = this.pos + block.length;
+          if (type != BlockType.WidgetBefore)
+              this.covering = block;
       }
-      update(update) {
-          if (update.docChanged && this.dragging)
-              this.dragging = this.dragging.map(update.changes);
-          if (this.style.update(update))
-              setTimeout(() => this.select(this.lastEvent), 20);
+      addLineDeco(height, breaks, length) {
+          let line = this.ensureLine();
+          line.length += length;
+          line.collapsed += length;
+          line.widgetHeight = Math.max(line.widgetHeight, height);
+          line.breaks += breaks;
+          this.writtenTo = this.pos = this.pos + length;
+      }
+      finish(from) {
+          let last = this.nodes.length == 0 ? null : this.nodes[this.nodes.length - 1];
+          if (this.lineStart > -1 && !(last instanceof HeightMapText) && !this.isCovered)
+              this.nodes.push(new HeightMapText(0, -1));
+          else if (this.writtenTo < this.pos || last == null)
+              this.nodes.push(this.blankContent(this.writtenTo, this.pos));
+          let pos = from;
+          for (let node of this.nodes) {
+              if (node instanceof HeightMapText)
+                  node.updateHeight(this.oracle, pos);
+              pos += node ? node.length : 1;
+          }
+          return this.nodes;
+      }
+      // Always called with a region that on both sides either stretches
+      // to a line break or the end of the document.
+      // The returned array uses null to indicate line breaks, but never
+      // starts or ends in a line break, or has multiple line breaks next
+      // to each other.
+      static build(oracle, decorations, from, to) {
+          let builder = new NodeBuilder(from, oracle);
+          RangeSet.spans(decorations, from, to, builder, 0);
+          return builder.finish(from);
       }
   }
-  function addsSelectionRange(view, event) {
-      let facet = view.state.facet(clickAddsSelectionRange);
-      return facet.length ? facet[0](event) : browser.mac ? event.metaKey : event.ctrlKey;
-  }
-  function dragMovesSelection(view, event) {
-      let facet = view.state.facet(dragMovesSelection$1);
-      return facet.length ? facet[0](event) : browser.mac ? !event.altKey : !event.ctrlKey;
+  function heightRelevantDecoChanges(a, b, diff) {
+      let comp = new DecorationComparator;
+      RangeSet.compare(a, b, diff, comp, 0);
+      return comp.changes;
   }
-  function isInPrimarySelection(view, event) {
-      let { main } = view.state.selection;
-      if (main.empty)
-          return false;
-      // On boundary clicks, check whether the coordinates are inside the
-      // selection's client rectangles
-      let sel = getSelection(view.root);
-      if (!sel || sel.rangeCount == 0)
-          return true;
-      let rects = sel.getRangeAt(0).getClientRects();
-      for (let i = 0; i < rects.length; i++) {
-          let rect = rects[i];
-          if (rect.left <= event.clientX && rect.right >= event.clientX &&
-              rect.top <= event.clientY && rect.bottom >= event.clientY)
-              return true;
+  class DecorationComparator {
+      constructor() {
+          this.changes = [];
+      }
+      compareRange() { }
+      comparePoint(from, to, a, b) {
+          if (from < to || a && a.heightRelevant || b && b.heightRelevant)
+              addRange(from, to, this.changes, 5);
       }
-      return false;
-  }
-  function eventBelongsToEditor(view, event) {
-      if (!event.bubbles)
-          return true;
-      if (event.defaultPrevented)
-          return false;
-      for (let node = event.target, cView; node != view.contentDOM; node = node.parentNode)
-          if (!node || node.nodeType == 11 || ((cView = ContentView.get(node)) && cView.ignoreEvent(event)))
-              return false;
-      return true;
   }
-  const handlers = /*@__PURE__*/Object.create(null);
-  const handlerOptions = /*@__PURE__*/Object.create(null);
-  // This is very crude, but unfortunately both these browsers _pretend_
-  // that they have a clipboard API—all the objects and methods are
-  // there, they just don't work, and they are hard to test.
-  const brokenClipboardAPI = (browser.ie && browser.ie_version < 15) ||
-      (browser.ios && browser.webkit_version < 604);
-  function capturePaste(view) {
-      let parent = view.dom.parentNode;
-      if (!parent)
-          return;
-      let target = parent.appendChild(document.createElement("textarea"));
-      target.style.cssText = "position: fixed; left: -10000px; top: 10px";
-      target.focus();
-      setTimeout(() => {
-          view.focus();
-          target.remove();
-          doPaste(view, target.value);
-      }, 50);
-  }
-  function doPaste(view, input) {
-      let { state } = view, changes, i = 1, text = state.toText(input);
-      let byLine = text.lines == state.selection.ranges.length;
-      let linewise = lastLinewiseCopy != null && state.selection.ranges.every(r => r.empty) && lastLinewiseCopy == text.toString();
-      if (linewise) {
-          let lastLine = -1;
-          changes = state.changeByRange(range => {
-              let line = state.doc.lineAt(range.from);
-              if (line.from == lastLine)
-                  return { range };
-              lastLine = line.from;
-              let insert = state.toText((byLine ? text.line(i++).text : input) + state.lineBreak);
-              return { changes: { from: line.from, insert },
-                  range: EditorSelection.cursor(range.from + insert.length) };
-          });
-      }
-      else if (byLine) {
-          changes = state.changeByRange(range => {
-              let line = text.line(i++);
-              return { changes: { from: range.from, to: range.to, insert: line.text },
-                  range: EditorSelection.cursor(range.from + line.length) };
-          });
-      }
-      else {
-          changes = state.replaceSelection(text);
-      }
-      view.dispatch(changes, {
-          userEvent: "input.paste",
-          scrollIntoView: true
-      });
-  }
-  handlers.keydown = (view, event) => {
-      view.inputState.setSelectionOrigin("select");
-      if (event.keyCode == 27)
-          view.inputState.lastEscPress = Date.now();
-      else if (modifierCodes.indexOf(event.keyCode) < 0)
-          view.inputState.lastEscPress = 0;
-  };
-  handlers.touchstart = (view, e) => {
-      view.inputState.lastTouchTime = Date.now();
-      view.inputState.setSelectionOrigin("select.pointer");
-  };
-  handlers.touchmove = view => {
-      view.inputState.setSelectionOrigin("select.pointer");
-  };
-  handlerOptions.touchstart = handlerOptions.touchmove = { passive: true };
-  handlers.mousedown = (view, event) => {
-      view.observer.flush();
-      if (view.inputState.lastTouchTime > Date.now() - 2000)
-          return; // Ignore touch interaction
-      let style = null;
-      for (let makeStyle of view.state.facet(mouseSelectionStyle)) {
-          style = makeStyle(view, event);
-          if (style)
+
+  function visiblePixelRange(dom, paddingTop) {
+      let rect = dom.getBoundingClientRect();
+      let doc = dom.ownerDocument, win = doc.defaultView || window;
+      let left = Math.max(0, rect.left), right = Math.min(win.innerWidth, rect.right);
+      let top = Math.max(0, rect.top), bottom = Math.min(win.innerHeight, rect.bottom);
+      for (let parent = dom.parentNode; parent && parent != doc.body;) {
+          if (parent.nodeType == 1) {
+              let elt = parent;
+              let style = window.getComputedStyle(elt);
+              if ((elt.scrollHeight > elt.clientHeight || elt.scrollWidth > elt.clientWidth) &&
+                  style.overflow != "visible") {
+                  let parentRect = elt.getBoundingClientRect();
+                  left = Math.max(left, parentRect.left);
+                  right = Math.min(right, parentRect.right);
+                  top = Math.max(top, parentRect.top);
+                  bottom = parent == dom.parentNode ? parentRect.bottom : Math.min(bottom, parentRect.bottom);
+              }
+              parent = style.position == "absolute" || style.position == "fixed" ? elt.offsetParent : elt.parentNode;
+          }
+          else if (parent.nodeType == 11) { // Shadow root
+              parent = parent.host;
+          }
+          else {
               break;
+          }
       }
-      if (!style && event.button == 0)
-          style = basicMouseSelection(view, event);
-      if (style) {
-          let mustFocus = view.root.activeElement != view.contentDOM;
-          if (mustFocus)
-              view.observer.ignore(() => focusPreventScroll(view.contentDOM));
-          view.inputState.startMouseSelection(new MouseSelection(view, event, style, mustFocus));
-      }
-  };
-  function rangeForClick(view, pos, bias, type) {
-      if (type == 1) { // Single click
-          return EditorSelection.cursor(pos, bias);
+      return { left: left - rect.left, right: Math.max(left, right) - rect.left,
+          top: top - (rect.top + paddingTop), bottom: Math.max(top, bottom) - (rect.top + paddingTop) };
+  }
+  function fullPixelRange(dom, paddingTop) {
+      let rect = dom.getBoundingClientRect();
+      return { left: 0, right: rect.right - rect.left,
+          top: paddingTop, bottom: rect.bottom - (rect.top + paddingTop) };
+  }
+  // Line gaps are placeholder widgets used to hide pieces of overlong
+  // lines within the viewport, as a kludge to keep the editor
+  // responsive when a ridiculously long line is loaded into it.
+  class LineGap {
+      constructor(from, to, size) {
+          this.from = from;
+          this.to = to;
+          this.size = size;
       }
-      else if (type == 2) { // Double click
-          return groupAt(view.state, pos, bias);
+      static same(a, b) {
+          if (a.length != b.length)
+              return false;
+          for (let i = 0; i < a.length; i++) {
+              let gA = a[i], gB = b[i];
+              if (gA.from != gB.from || gA.to != gB.to || gA.size != gB.size)
+                  return false;
+          }
+          return true;
       }
-      else { // Triple click
-          let visual = LineView.find(view.docView, pos), line = view.state.doc.lineAt(visual ? visual.posAtEnd : pos);
-          let from = visual ? visual.posAtStart : line.from, to = visual ? visual.posAtEnd : line.to;
-          if (to < view.state.doc.length && to == line.to)
-              to++;
-          return EditorSelection.range(from, to);
+      draw(wrapping) {
+          return Decoration.replace({ widget: new LineGapWidget(this.size, wrapping) }).range(this.from, this.to);
       }
   }
-  let insideY = (y, rect) => y >= rect.top && y <= rect.bottom;
-  let inside = (x, y, rect) => insideY(y, rect) && x >= rect.left && x <= rect.right;
-  // Try to determine, for the given coordinates, associated with the
-  // given position, whether they are related to the element before or
-  // the element after the position.
-  function findPositionSide(view, pos, x, y) {
-      let line = LineView.find(view.docView, pos);
-      if (!line)
-          return 1;
-      let off = pos - line.posAtStart;
-      // Line boundaries point into the line
-      if (off == 0)
-          return 1;
-      if (off == line.length)
-          return -1;
-      // Positions on top of an element point at that element
-      let before = line.coordsAt(off, -1);
-      if (before && inside(x, y, before))
-          return -1;
-      let after = line.coordsAt(off, 1);
-      if (after && inside(x, y, after))
-          return 1;
-      // This is probably a line wrap point. Pick before if the point is
-      // beside it.
-      return before && insideY(y, before) ? -1 : 1;
-  }
-  function queryPos(view, event) {
-      let pos = view.posAtCoords({ x: event.clientX, y: event.clientY }, false);
-      return { pos, bias: findPositionSide(view, pos, event.clientX, event.clientY) };
-  }
-  const BadMouseDetail = browser.ie && browser.ie_version <= 11;
-  let lastMouseDown = null, lastMouseDownCount = 0, lastMouseDownTime = 0;
-  function getClickType(event) {
-      if (!BadMouseDetail)
-          return event.detail;
-      let last = lastMouseDown, lastTime = lastMouseDownTime;
-      lastMouseDown = event;
-      lastMouseDownTime = Date.now();
-      return lastMouseDownCount = !last || (lastTime > Date.now() - 400 && Math.abs(last.clientX - event.clientX) < 2 &&
-          Math.abs(last.clientY - event.clientY) < 2) ? (lastMouseDownCount + 1) % 3 : 1;
-  }
-  function basicMouseSelection(view, event) {
-      let start = queryPos(view, event), type = getClickType(event);
-      let startSel = view.state.selection;
-      let last = start, lastEvent = event;
-      return {
-          update(update) {
-              if (update.docChanged) {
-                  start.pos = update.changes.mapPos(start.pos);
-                  startSel = startSel.map(update.changes);
-                  lastEvent = null;
-              }
-          },
-          get(event, extend, multiple) {
-              let cur;
-              if (lastEvent && event.clientX == lastEvent.clientX && event.clientY == lastEvent.clientY)
-                  cur = last;
-              else {
-                  cur = last = queryPos(view, event);
-                  lastEvent = event;
-              }
-              let range = rangeForClick(view, cur.pos, cur.bias, type);
-              if (start.pos != cur.pos && !extend) {
-                  let startRange = rangeForClick(view, start.pos, start.bias, type);
-                  let from = Math.min(startRange.from, range.from), to = Math.max(startRange.to, range.to);
-                  range = from < range.from ? EditorSelection.range(from, to) : EditorSelection.range(to, from);
-              }
-              if (extend)
-                  return startSel.replaceRange(startSel.main.extend(range.from, range.to));
-              else if (multiple && startSel.ranges.length > 1 && startSel.ranges.some(r => r.eq(range)))
-                  return removeRange(startSel, range);
-              else if (multiple)
-                  return startSel.addRange(range);
-              else
-                  return EditorSelection.create([range]);
+  class LineGapWidget extends WidgetType {
+      constructor(size, vertical) {
+          super();
+          this.size = size;
+          this.vertical = vertical;
+      }
+      eq(other) { return other.size == this.size && other.vertical == this.vertical; }
+      toDOM() {
+          let elt = document.createElement("div");
+          if (this.vertical) {
+              elt.style.height = this.size + "px";
           }
-      };
-  }
-  function removeRange(sel, range) {
-      for (let i = 0;; i++) {
-          if (sel.ranges[i].eq(range))
-              return EditorSelection.create(sel.ranges.slice(0, i).concat(sel.ranges.slice(i + 1)), sel.mainIndex == i ? 0 : sel.mainIndex - (sel.mainIndex > i ? 1 : 0));
+          else {
+              elt.style.width = this.size + "px";
+              elt.style.height = "2px";
+              elt.style.display = "inline-block";
+          }
+          return elt;
       }
+      get estimatedHeight() { return this.vertical ? this.size : -1; }
   }
-  handlers.dragstart = (view, event) => {
-      let { selection: { main } } = view.state;
-      let { mouseSelection } = view.inputState;
-      if (mouseSelection)
-          mouseSelection.dragging = main;
-      if (event.dataTransfer) {
-          event.dataTransfer.setData("Text", view.state.sliceDoc(main.from, main.to));
-          event.dataTransfer.effectAllowed = "copyMove";
+  class ViewState {
+      constructor(state) {
+          this.state = state;
+          // These are contentDOM-local coordinates
+          this.pixelViewport = { left: 0, right: window.innerWidth, top: 0, bottom: 0 };
+          this.inView = true;
+          this.paddingTop = 0;
+          this.paddingBottom = 0;
+          this.contentDOMWidth = 0;
+          this.contentDOMHeight = 0;
+          this.editorHeight = 0;
+          this.editorWidth = 0;
+          this.scrollTop = 0;
+          this.scrolledToBottom = true;
+          // The vertical position (document-relative) to which to anchor the
+          // scroll position. -1 means anchor to the end of the document.
+          this.scrollAnchorPos = 0;
+          // The height at the anchor position. Set by the DOM update phase.
+          // -1 means no height available.
+          this.scrollAnchorHeight = -1;
+          // See VP.MaxDOMHeight
+          this.scaler = IdScaler;
+          this.scrollTarget = null;
+          // Briefly set to true when printing, to disable viewport limiting
+          this.printing = false;
+          // Flag set when editor content was redrawn, so that the next
+          // measure stage knows it must read DOM layout
+          this.mustMeasureContent = true;
+          this.defaultTextDirection = Direction.LTR;
+          this.visibleRanges = [];
+          // Cursor 'assoc' is only significant when the cursor is on a line
+          // wrap point, where it must stick to the character that it is
+          // associated with. Since browsers don't provide a reasonable
+          // interface to set or query this, when a selection is set that
+          // might cause this to be significant, this flag is set. The next
+          // measure phase will check whether the cursor is on a line-wrapping
+          // boundary and, if so, reset it to make sure it is positioned in
+          // the right place.
+          this.mustEnforceCursorAssoc = false;
+          let guessWrapping = state.facet(contentAttributes).some(v => typeof v != "function" && v.class == "cm-lineWrapping");
+          this.heightOracle = new HeightOracle(guessWrapping);
+          this.stateDeco = state.facet(decorations).filter(d => typeof d != "function");
+          this.heightMap = HeightMap.empty().applyChanges(this.stateDeco, Text$1.empty, this.heightOracle.setDoc(state.doc), [new ChangedRange(0, 0, 0, state.doc.length)]);
+          this.viewport = this.getViewport(0, null);
+          this.updateViewportLines();
+          this.updateForViewport();
+          this.lineGaps = this.ensureLineGaps([]);
+          this.lineGapDeco = Decoration.set(this.lineGaps.map(gap => gap.draw(false)));
+          this.computeVisibleRanges();
       }
-  };
-  function dropText(view, event, text, direct) {
-      if (!text)
-          return;
-      let dropPos = view.posAtCoords({ x: event.clientX, y: event.clientY }, false);
-      event.preventDefault();
-      let { mouseSelection } = view.inputState;
-      let del = direct && mouseSelection && mouseSelection.dragging && mouseSelection.dragMove ?
-          { from: mouseSelection.dragging.from, to: mouseSelection.dragging.to } : null;
-      let ins = { from: dropPos, insert: text };
-      let changes = view.state.changes(del ? [del, ins] : ins);
-      view.focus();
-      view.dispatch({
-          changes,
-          selection: { anchor: changes.mapPos(dropPos, -1), head: changes.mapPos(dropPos, 1) },
-          userEvent: del ? "move.drop" : "input.drop"
-      });
-  }
-  handlers.drop = (view, event) => {
-      if (!event.dataTransfer)
-          return;
-      if (view.state.readOnly)
-          return event.preventDefault();
-      let files = event.dataTransfer.files;
-      if (files && files.length) { // For a file drop, read the file's text.
-          event.preventDefault();
-          let text = Array(files.length), read = 0;
-          let finishFile = () => {
-              if (++read == files.length)
-                  dropText(view, event, text.filter(s => s != null).join(view.state.lineBreak), false);
-          };
-          for (let i = 0; i < files.length; i++) {
-              let reader = new FileReader;
-              reader.onerror = finishFile;
-              reader.onload = () => {
-                  if (!/[\x00-\x08\x0e-\x1f]{2}/.test(reader.result))
-                      text[i] = reader.result;
-                  finishFile();
-              };
-              reader.readAsText(files[i]);
+      updateForViewport() {
+          let viewports = [this.viewport], { main } = this.state.selection;
+          for (let i = 0; i <= 1; i++) {
+              let pos = i ? main.head : main.anchor;
+              if (!viewports.some(({ from, to }) => pos >= from && pos <= to)) {
+                  let { from, to } = this.lineBlockAt(pos);
+                  viewports.push(new Viewport(from, to));
+              }
           }
+          this.viewports = viewports.sort((a, b) => a.from - b.from);
+          this.scaler = this.heightMap.height <= 7000000 /* MaxDOMHeight */ ? IdScaler :
+              new BigScaler(this.heightOracle, this.heightMap, this.viewports);
       }
-      else {
-          dropText(view, event, event.dataTransfer.getData("Text"), true);
-      }
-  };
-  handlers.paste = (view, event) => {
-      if (view.state.readOnly)
-          return event.preventDefault();
-      view.observer.flush();
-      let data = brokenClipboardAPI ? null : event.clipboardData;
-      if (data) {
-          doPaste(view, data.getData("text/plain"));
-          event.preventDefault();
+      updateViewportLines() {
+          this.viewportLines = [];
+          this.heightMap.forEachLine(this.viewport.from, this.viewport.to, this.heightOracle.setDoc(this.state.doc), 0, 0, block => {
+              this.viewportLines.push(this.scaler.scale == 1 ? block : scaleBlock(block, this.scaler));
+          });
       }
-      else {
-          capturePaste(view);
+      update(update, scrollTarget = null) {
+          this.state = update.state;
+          let prevDeco = this.stateDeco;
+          this.stateDeco = this.state.facet(decorations).filter(d => typeof d != "function");
+          let contentChanges = update.changedRanges;
+          let heightChanges = ChangedRange.extendWithRanges(contentChanges, heightRelevantDecoChanges(prevDeco, this.stateDeco, update ? update.changes : ChangeSet.empty(this.state.doc.length)));
+          let prevHeight = this.heightMap.height;
+          let scrollAnchor = this.scrolledToBottom ? null : this.lineBlockAtHeight(this.scrollTop);
+          this.heightMap = this.heightMap.applyChanges(this.stateDeco, update.startState.doc, this.heightOracle.setDoc(this.state.doc), heightChanges);
+          if (this.heightMap.height != prevHeight)
+              update.flags |= 2 /* Height */;
+          if (scrollAnchor) {
+              this.scrollAnchorPos = update.changes.mapPos(scrollAnchor.from, -1);
+              this.scrollAnchorHeight = scrollAnchor.top;
+          }
+          else {
+              this.scrollAnchorPos = -1;
+              this.scrollAnchorHeight = this.heightMap.height;
+          }
+          let viewport = heightChanges.length ? this.mapViewport(this.viewport, update.changes) : this.viewport;
+          if (scrollTarget && (scrollTarget.range.head < viewport.from || scrollTarget.range.head > viewport.to) ||
+              !this.viewportIsAppropriate(viewport))
+              viewport = this.getViewport(0, scrollTarget);
+          let updateLines = !update.changes.empty || (update.flags & 2 /* Height */) ||
+              viewport.from != this.viewport.from || viewport.to != this.viewport.to;
+          this.viewport = viewport;
+          this.updateForViewport();
+          if (updateLines)
+              this.updateViewportLines();
+          if (this.lineGaps.length || this.viewport.to - this.viewport.from > (2000 /* Margin */ << 1))
+              this.updateLineGaps(this.ensureLineGaps(this.mapLineGaps(this.lineGaps, update.changes)));
+          update.flags |= this.computeVisibleRanges();
+          if (scrollTarget)
+              this.scrollTarget = scrollTarget;
+          if (!this.mustEnforceCursorAssoc && update.selectionSet && update.view.lineWrapping &&
+              update.state.selection.main.empty && update.state.selection.main.assoc &&
+              !update.state.facet(nativeSelectionHidden))
+              this.mustEnforceCursorAssoc = true;
       }
-  };
-  function captureCopy(view, text) {
-      // The extra wrapper is somehow necessary on IE/Edge to prevent the
-      // content from being mangled when it is put onto the clipboard
-      let parent = view.dom.parentNode;
-      if (!parent)
-          return;
-      let target = parent.appendChild(document.createElement("textarea"));
-      target.style.cssText = "position: fixed; left: -10000px; top: 10px";
-      target.value = text;
-      target.focus();
-      target.selectionEnd = text.length;
-      target.selectionStart = 0;
-      setTimeout(() => {
-          target.remove();
-          view.focus();
-      }, 50);
-  }
-  function copiedRange(state) {
-      let content = [], ranges = [], linewise = false;
-      for (let range of state.selection.ranges)
-          if (!range.empty) {
-              content.push(state.sliceDoc(range.from, range.to));
-              ranges.push(range);
+      measure(view) {
+          let dom = view.contentDOM, style = window.getComputedStyle(dom);
+          let oracle = this.heightOracle;
+          let whiteSpace = style.whiteSpace;
+          this.defaultTextDirection = style.direction == "rtl" ? Direction.RTL : Direction.LTR;
+          let refresh = this.heightOracle.mustRefreshForWrapping(whiteSpace);
+          let domRect = dom.getBoundingClientRect();
+          let measureContent = refresh || this.mustMeasureContent || this.contentDOMHeight != domRect.height;
+          this.contentDOMHeight = domRect.height;
+          this.mustMeasureContent = false;
+          let result = 0, bias = 0;
+          // Vertical padding
+          let paddingTop = parseInt(style.paddingTop) || 0, paddingBottom = parseInt(style.paddingBottom) || 0;
+          if (this.paddingTop != paddingTop || this.paddingBottom != paddingBottom) {
+              this.paddingTop = paddingTop;
+              this.paddingBottom = paddingBottom;
+              result |= 8 /* Geometry */ | 2 /* Height */;
           }
-      if (!content.length) {
-          // Nothing selected, do a line-wise copy
-          let upto = -1;
-          for (let { from } of state.selection.ranges) {
-              let line = state.doc.lineAt(from);
-              if (line.number > upto) {
-                  content.push(line.text);
-                  ranges.push({ from: line.from, to: Math.min(state.doc.length, line.to + 1) });
+          if (this.editorWidth != view.scrollDOM.clientWidth) {
+              if (oracle.lineWrapping)
+                  measureContent = true;
+              this.editorWidth = view.scrollDOM.clientWidth;
+              result |= 8 /* Geometry */;
+          }
+          if (this.scrollTop != view.scrollDOM.scrollTop) {
+              this.scrollAnchorHeight = -1;
+              this.scrollTop = view.scrollDOM.scrollTop;
+          }
+          this.scrolledToBottom = this.scrollTop > view.scrollDOM.scrollHeight - view.scrollDOM.clientHeight - 4;
+          // Pixel viewport
+          let pixelViewport = (this.printing ? fullPixelRange : visiblePixelRange)(dom, this.paddingTop);
+          let dTop = pixelViewport.top - this.pixelViewport.top, dBottom = pixelViewport.bottom - this.pixelViewport.bottom;
+          this.pixelViewport = pixelViewport;
+          let inView = this.pixelViewport.bottom > this.pixelViewport.top && this.pixelViewport.right > this.pixelViewport.left;
+          if (inView != this.inView) {
+              this.inView = inView;
+              if (inView)
+                  measureContent = true;
+          }
+          if (!this.inView && !this.scrollTarget)
+              return 0;
+          let contentWidth = domRect.width;
+          if (this.contentDOMWidth != contentWidth || this.editorHeight != view.scrollDOM.clientHeight) {
+              this.contentDOMWidth = domRect.width;
+              this.editorHeight = view.scrollDOM.clientHeight;
+              result |= 8 /* Geometry */;
+          }
+          if (measureContent) {
+              let lineHeights = view.docView.measureVisibleLineHeights(this.viewport);
+              if (oracle.mustRefreshForHeights(lineHeights))
+                  refresh = true;
+              if (refresh || oracle.lineWrapping && Math.abs(contentWidth - this.contentDOMWidth) > oracle.charWidth) {
+                  let { lineHeight, charWidth, textHeight } = view.docView.measureTextSize();
+                  refresh = lineHeight > 0 && oracle.refresh(whiteSpace, lineHeight, charWidth, textHeight, contentWidth / charWidth, lineHeights);
+                  if (refresh) {
+                      view.docView.minWidth = 0;
+                      result |= 8 /* Geometry */;
+                  }
               }
-              upto = line.number;
+              if (dTop > 0 && dBottom > 0)
+                  bias = Math.max(dTop, dBottom);
+              else if (dTop < 0 && dBottom < 0)
+                  bias = Math.min(dTop, dBottom);
+              oracle.heightChanged = false;
+              for (let vp of this.viewports) {
+                  let heights = vp.from == this.viewport.from ? lineHeights : view.docView.measureVisibleLineHeights(vp);
+                  this.heightMap = (refresh ? HeightMap.empty().applyChanges(this.stateDeco, Text$1.empty, this.heightOracle, [new ChangedRange(0, 0, 0, view.state.doc.length)]) : this.heightMap).updateHeight(oracle, 0, refresh, new MeasuredHeights(vp.from, heights));
+              }
+              if (oracle.heightChanged)
+                  result |= 2 /* Height */;
           }
-          linewise = true;
+          let viewportChange = !this.viewportIsAppropriate(this.viewport, bias) ||
+              this.scrollTarget && (this.scrollTarget.range.head < this.viewport.from ||
+                  this.scrollTarget.range.head > this.viewport.to);
+          if (viewportChange)
+              this.viewport = this.getViewport(bias, this.scrollTarget);
+          this.updateForViewport();
+          if ((result & 2 /* Height */) || viewportChange)
+              this.updateViewportLines();
+          if (this.lineGaps.length || this.viewport.to - this.viewport.from > (2000 /* Margin */ << 1))
+              this.updateLineGaps(this.ensureLineGaps(refresh ? [] : this.lineGaps, view));
+          result |= this.computeVisibleRanges();
+          if (this.mustEnforceCursorAssoc) {
+              this.mustEnforceCursorAssoc = false;
+              // This is done in the read stage, because moving the selection
+              // to a line end is going to trigger a layout anyway, so it
+              // can't be a pure write. It should be rare that it does any
+              // writing.
+              view.docView.enforceCursorAssoc();
+          }
+          return result;
       }
-      return { text: content.join(state.lineBreak), ranges, linewise };
-  }
-  let lastLinewiseCopy = null;
-  handlers.copy = handlers.cut = (view, event) => {
-      let { text, ranges, linewise } = copiedRange(view.state);
-      if (!text && !linewise)
-          return;
-      lastLinewiseCopy = linewise ? text : null;
-      let data = brokenClipboardAPI ? null : event.clipboardData;
-      if (data) {
-          event.preventDefault();
-          data.clearData();
-          data.setData("text/plain", text);
+      get visibleTop() { return this.scaler.fromDOM(this.pixelViewport.top); }
+      get visibleBottom() { return this.scaler.fromDOM(this.pixelViewport.bottom); }
+      getViewport(bias, scrollTarget) {
+          // This will divide VP.Margin between the top and the
+          // bottom, depending on the bias (the change in viewport position
+          // since the last update). It'll hold a number between 0 and 1
+          let marginTop = 0.5 - Math.max(-0.5, Math.min(0.5, bias / 1000 /* Margin */ / 2));
+          let map = this.heightMap, oracle = this.heightOracle;
+          let { visibleTop, visibleBottom } = this;
+          let viewport = new Viewport(map.lineAt(visibleTop - marginTop * 1000 /* Margin */, QueryType.ByHeight, oracle, 0, 0).from, map.lineAt(visibleBottom + (1 - marginTop) * 1000 /* Margin */, QueryType.ByHeight, oracle, 0, 0).to);
+          // If scrollTarget is given, make sure the viewport includes that position
+          if (scrollTarget) {
+              let { head } = scrollTarget.range;
+              if (head < viewport.from || head > viewport.to) {
+                  let viewHeight = Math.min(this.editorHeight, this.pixelViewport.bottom - this.pixelViewport.top);
+                  let block = map.lineAt(head, QueryType.ByPos, oracle, 0, 0), topPos;
+                  if (scrollTarget.y == "center")
+                      topPos = (block.top + block.bottom) / 2 - viewHeight / 2;
+                  else if (scrollTarget.y == "start" || scrollTarget.y == "nearest" && head < viewport.from)
+                      topPos = block.top;
+                  else
+                      topPos = block.bottom - viewHeight;
+                  viewport = new Viewport(map.lineAt(topPos - 1000 /* Margin */ / 2, QueryType.ByHeight, oracle, 0, 0).from, map.lineAt(topPos + viewHeight + 1000 /* Margin */ / 2, QueryType.ByHeight, oracle, 0, 0).to);
+              }
+          }
+          return viewport;
       }
-      else {
-          captureCopy(view, text);
+      mapViewport(viewport, changes) {
+          let from = changes.mapPos(viewport.from, -1), to = changes.mapPos(viewport.to, 1);
+          return new Viewport(this.heightMap.lineAt(from, QueryType.ByPos, this.heightOracle, 0, 0).from, this.heightMap.lineAt(to, QueryType.ByPos, this.heightOracle, 0, 0).to);
       }
-      if (event.type == "cut" && !view.state.readOnly)
-          view.dispatch({
-              changes: ranges,
-              scrollIntoView: true,
-              userEvent: "delete.cut"
-          });
-  };
-  function updateForFocusChange(view) {
-      setTimeout(() => {
-          if (view.hasFocus != view.inputState.notifiedFocused)
-              view.update([]);
-      }, 10);
-  }
-  handlers.focus = view => {
-      view.inputState.lastFocusTime = Date.now();
-      // When focusing reset the scroll position, move it back to where it was
-      if (!view.scrollDOM.scrollTop && (view.inputState.lastScrollTop || view.inputState.lastScrollLeft)) {
-          view.scrollDOM.scrollTop = view.inputState.lastScrollTop;
-          view.scrollDOM.scrollLeft = view.inputState.lastScrollLeft;
+      // Checks if a given viewport covers the visible part of the
+      // document and not too much beyond that.
+      viewportIsAppropriate({ from, to }, bias = 0) {
+          if (!this.inView)
+              return true;
+          let { top } = this.heightMap.lineAt(from, QueryType.ByPos, this.heightOracle, 0, 0);
+          let { bottom } = this.heightMap.lineAt(to, QueryType.ByPos, this.heightOracle, 0, 0);
+          let { visibleTop, visibleBottom } = this;
+          return (from == 0 || top <= visibleTop - Math.max(10 /* MinCoverMargin */, Math.min(-bias, 250 /* MaxCoverMargin */))) &&
+              (to == this.state.doc.length ||
+                  bottom >= visibleBottom + Math.max(10 /* MinCoverMargin */, Math.min(bias, 250 /* MaxCoverMargin */))) &&
+              (top > visibleTop - 2 * 1000 /* Margin */ && bottom < visibleBottom + 2 * 1000 /* Margin */);
       }
-      updateForFocusChange(view);
-  };
-  handlers.blur = view => {
-      view.observer.clearSelectionRange();
-      updateForFocusChange(view);
-  };
-  handlers.compositionstart = handlers.compositionupdate = view => {
-      if (view.inputState.compositionFirstChange == null)
-          view.inputState.compositionFirstChange = true;
-      if (view.inputState.composing < 0) {
-          // FIXME possibly set a timeout to clear it again on Android
-          view.inputState.composing = 0;
+      mapLineGaps(gaps, changes) {
+          if (!gaps.length || changes.empty)
+              return gaps;
+          let mapped = [];
+          for (let gap of gaps)
+              if (!changes.touchesRange(gap.from, gap.to))
+                  mapped.push(new LineGap(changes.mapPos(gap.from), changes.mapPos(gap.to), gap.size));
+          return mapped;
       }
-  };
-  handlers.compositionend = view => {
-      view.inputState.composing = -1;
-      view.inputState.compositionEndedAt = Date.now();
-      view.inputState.compositionFirstChange = null;
-      if (browser.chrome && browser.android)
-          view.observer.flushSoon();
-      setTimeout(() => {
-          // Force the composition state to be cleared if it hasn't already been
-          if (view.inputState.composing < 0 && view.docView.compositionDeco.size)
-              view.update([]);
-      }, 50);
-  };
-  handlers.contextmenu = view => {
-      view.inputState.lastContextMenu = Date.now();
-  };
-  handlers.beforeinput = (view, event) => {
-      var _a;
-      // Because Chrome Android doesn't fire useful key events, use
-      // beforeinput to detect backspace (and possibly enter and delete,
-      // but those usually don't even seem to fire beforeinput events at
-      // the moment) and fake a key event for it.
-      //
-      // (preventDefault on beforeinput, though supported in the spec,
-      // seems to do nothing at all on Chrome).
-      let pending;
-      if (browser.chrome && browser.android && (pending = PendingKeys.find(key => key.inputType == event.inputType))) {
-          view.observer.delayAndroidKey(pending.key, pending.keyCode);
-          if (pending.key == "Backspace" || pending.key == "Delete") {
-              let startViewHeight = ((_a = window.visualViewport) === null || _a === void 0 ? void 0 : _a.height) || 0;
-              setTimeout(() => {
-                  var _a;
-                  // Backspacing near uneditable nodes on Chrome Android sometimes
-                  // closes the virtual keyboard. This tries to crudely detect
-                  // that and refocus to get it back.
-                  if ((((_a = window.visualViewport) === null || _a === void 0 ? void 0 : _a.height) || 0) > startViewHeight + 10 && view.hasFocus) {
-                      view.contentDOM.blur();
-                      view.focus();
+      // Computes positions in the viewport where the start or end of a
+      // line should be hidden, trying to reuse existing line gaps when
+      // appropriate to avoid unneccesary redraws.
+      // Uses crude character-counting for the positioning and sizing,
+      // since actual DOM coordinates aren't always available and
+      // predictable. Relies on generous margins (see LG.Margin) to hide
+      // the artifacts this might produce from the user.
+      ensureLineGaps(current, mayMeasure) {
+          let wrapping = this.heightOracle.lineWrapping;
+          let margin = wrapping ? 10000 /* MarginWrap */ : 2000 /* Margin */, halfMargin = margin >> 1, doubleMargin = margin << 1;
+          // The non-wrapping logic won't work at all in predominantly right-to-left text.
+          if (this.defaultTextDirection != Direction.LTR && !wrapping)
+              return [];
+          let gaps = [];
+          let addGap = (from, to, line, structure) => {
+              if (to - from < halfMargin)
+                  return;
+              let sel = this.state.selection.main, avoid = [sel.from];
+              if (!sel.empty)
+                  avoid.push(sel.to);
+              for (let pos of avoid) {
+                  if (pos > from && pos < to) {
+                      addGap(from, pos - 10 /* SelectionMargin */, line, structure);
+                      addGap(pos + 10 /* SelectionMargin */, to, line, structure);
+                      return;
                   }
-              }, 100);
-          }
-      }
-  };
-
-  const wrappingWhiteSpace = ["pre-wrap", "normal", "pre-line", "break-spaces"];
-  class HeightOracle {
-      constructor(lineWrapping) {
-          this.lineWrapping = lineWrapping;
-          this.doc = Text$1.empty;
-          this.heightSamples = {};
-          this.lineHeight = 14;
-          this.charWidth = 7;
-          this.lineLength = 30;
-          // Used to track, during updateHeight, if any actual heights changed
-          this.heightChanged = false;
-      }
-      heightForGap(from, to) {
-          let lines = this.doc.lineAt(to).number - this.doc.lineAt(from).number + 1;
-          if (this.lineWrapping)
-              lines += Math.ceil(((to - from) - (lines * this.lineLength * 0.5)) / this.lineLength);
-          return this.lineHeight * lines;
-      }
-      heightForLine(length) {
-          if (!this.lineWrapping)
-              return this.lineHeight;
-          let lines = 1 + Math.max(0, Math.ceil((length - this.lineLength) / (this.lineLength - 5)));
-          return lines * this.lineHeight;
-      }
-      setDoc(doc) { this.doc = doc; return this; }
-      mustRefreshForWrapping(whiteSpace) {
-          return (wrappingWhiteSpace.indexOf(whiteSpace) > -1) != this.lineWrapping;
-      }
-      mustRefreshForHeights(lineHeights) {
-          let newHeight = false;
-          for (let i = 0; i < lineHeights.length; i++) {
-              let h = lineHeights[i];
-              if (h < 0) {
-                  i++;
-              }
-              else if (!this.heightSamples[Math.floor(h * 10)]) { // Round to .1 pixels
-                  newHeight = true;
-                  this.heightSamples[Math.floor(h * 10)] = true;
-              }
-          }
-          return newHeight;
-      }
-      refresh(whiteSpace, lineHeight, charWidth, lineLength, knownHeights) {
-          let lineWrapping = wrappingWhiteSpace.indexOf(whiteSpace) > -1;
-          let changed = Math.round(lineHeight) != Math.round(this.lineHeight) || this.lineWrapping != lineWrapping;
-          this.lineWrapping = lineWrapping;
-          this.lineHeight = lineHeight;
-          this.charWidth = charWidth;
-          this.lineLength = lineLength;
-          if (changed) {
-              this.heightSamples = {};
-              for (let i = 0; i < knownHeights.length; i++) {
-                  let h = knownHeights[i];
-                  if (h < 0)
-                      i++;
-                  else
-                      this.heightSamples[Math.floor(h * 10)] = true;
-              }
-          }
-          return changed;
-      }
-  }
-  // This object is used by `updateHeight` to make DOM measurements
-  // arrive at the right nides. The `heights` array is a sequence of
-  // block heights, starting from position `from`.
-  class MeasuredHeights {
-      constructor(from, heights) {
-          this.from = from;
-          this.heights = heights;
-          this.index = 0;
-      }
-      get more() { return this.index < this.heights.length; }
-  }
-  /**
-  Record used to represent information about a block-level element
-  in the editor view.
-  */
-  class BlockInfo {
-      /**
-      @internal
-      */
-      constructor(
-      /**
-      The start of the element in the document.
-      */
-      from, 
-      /**
-      The length of the element.
-      */
-      length, 
-      /**
-      The top position of the element (relative to the top of the
-      document).
-      */
-      top, 
-      /**
-      Its height.
-      */
-      height, 
-      /**
-      The type of element this is. When querying lines, this may be
-      an array of all the blocks that make up the line.
-      */
-      type) {
-          this.from = from;
-          this.length = length;
-          this.top = top;
-          this.height = height;
-          this.type = type;
-      }
-      /**
-      The end of the element as a document position.
-      */
-      get to() { return this.from + this.length; }
-      /**
-      The bottom position of the element.
-      */
-      get bottom() { return this.top + this.height; }
-      /**
-      @internal
-      */
-      join(other) {
-          let detail = (Array.isArray(this.type) ? this.type : [this])
-              .concat(Array.isArray(other.type) ? other.type : [other]);
-          return new BlockInfo(this.from, this.length + other.length, this.top, this.height + other.height, detail);
-      }
-  }
-  var QueryType = /*@__PURE__*/(function (QueryType) {
-      QueryType[QueryType["ByPos"] = 0] = "ByPos";
-      QueryType[QueryType["ByHeight"] = 1] = "ByHeight";
-      QueryType[QueryType["ByPosNoHeight"] = 2] = "ByPosNoHeight";
-  return QueryType})(QueryType || (QueryType = {}));
-  const Epsilon = 1e-3;
-  class HeightMap {
-      constructor(length, // The number of characters covered
-      height, // Height of this part of the document
-      flags = 2 /* Flag.Outdated */) {
-          this.length = length;
-          this.height = height;
-          this.flags = flags;
-      }
-      get outdated() { return (this.flags & 2 /* Flag.Outdated */) > 0; }
-      set outdated(value) { this.flags = (value ? 2 /* Flag.Outdated */ : 0) | (this.flags & ~2 /* Flag.Outdated */); }
-      setHeight(oracle, height) {
-          if (this.height != height) {
-              if (Math.abs(this.height - height) > Epsilon)
-                  oracle.heightChanged = true;
-              this.height = height;
-          }
-      }
-      // Base case is to replace a leaf node, which simply builds a tree
-      // from the new nodes and returns that (HeightMapBranch and
-      // HeightMapGap override this to actually use from/to)
-      replace(_from, _to, nodes) {
-          return HeightMap.of(nodes);
-      }
-      // Again, these are base cases, and are overridden for branch and gap nodes.
-      decomposeLeft(_to, result) { result.push(this); }
-      decomposeRight(_from, result) { result.push(this); }
-      applyChanges(decorations, oldDoc, oracle, changes) {
-          let me = this;
-          for (let i = changes.length - 1; i >= 0; i--) {
-              let { fromA, toA, fromB, toB } = changes[i];
-              let start = me.lineAt(fromA, QueryType.ByPosNoHeight, oldDoc, 0, 0);
-              let end = start.to >= toA ? start : me.lineAt(toA, QueryType.ByPosNoHeight, oldDoc, 0, 0);
-              toB += end.to - toA;
-              toA = end.to;
-              while (i > 0 && start.from <= changes[i - 1].toA) {
-                  fromA = changes[i - 1].fromA;
-                  fromB = changes[i - 1].fromB;
-                  i--;
-                  if (fromA < start.from)
-                      start = me.lineAt(fromA, QueryType.ByPosNoHeight, oldDoc, 0, 0);
               }
-              fromB += start.from - fromA;
-              fromA = start.from;
-              let nodes = NodeBuilder.build(oracle, decorations, fromB, toB);
-              me = me.replace(fromA, toA, nodes);
-          }
-          return me.updateHeight(oracle, 0);
-      }
-      static empty() { return new HeightMapText(0, 0); }
-      // nodes uses null values to indicate the position of line breaks.
-      // There are never line breaks at the start or end of the array, or
-      // two line breaks next to each other, and the array isn't allowed
-      // to be empty (same restrictions as return value from the builder).
-      static of(nodes) {
-          if (nodes.length == 1)
-              return nodes[0];
-          let i = 0, j = nodes.length, before = 0, after = 0;
-          for (;;) {
-              if (i == j) {
-                  if (before > after * 2) {
-                      let split = nodes[i - 1];
-                      if (split.break)
-                          nodes.splice(--i, 1, split.left, null, split.right);
-                      else
-                          nodes.splice(--i, 1, split.left, split.right);
-                      j += 1 + split.break;
-                      before -= split.size;
+              let gap = find(current, gap => gap.from >= line.from && gap.to <= line.to &&
+                  Math.abs(gap.from - from) < halfMargin && Math.abs(gap.to - to) < halfMargin &&
+                  !avoid.some(pos => gap.from < pos && gap.to > pos));
+              if (!gap) {
+                  // When scrolling down, snap gap ends to line starts to avoid shifts in wrapping
+                  if (to < line.to && mayMeasure && wrapping &&
+                      mayMeasure.visibleRanges.some(r => r.from <= to && r.to >= to)) {
+                      let lineStart = mayMeasure.moveToLineBoundary(EditorSelection.cursor(to), false, true).head;
+                      if (lineStart > from)
+                          to = lineStart;
                   }
-                  else if (after > before * 2) {
-                      let split = nodes[j];
-                      if (split.break)
-                          nodes.splice(j, 1, split.left, null, split.right);
-                      else
-                          nodes.splice(j, 1, split.left, split.right);
-                      j += 2 + split.break;
-                      after -= split.size;
+                  gap = new LineGap(from, to, this.gapSize(line, from, to, structure));
+              }
+              gaps.push(gap);
+          };
+          for (let line of this.viewportLines) {
+              if (line.length < doubleMargin)
+                  continue;
+              let structure = lineStructure(line.from, line.to, this.stateDeco);
+              if (structure.total < doubleMargin)
+                  continue;
+              let target = this.scrollTarget ? this.scrollTarget.range.head : null;
+              let viewFrom, viewTo;
+              if (wrapping) {
+                  let marginHeight = (margin / this.heightOracle.lineLength) * this.heightOracle.lineHeight;
+                  let top, bot;
+                  if (target != null) {
+                      let targetFrac = findFraction(structure, target);
+                      let spaceFrac = ((this.visibleBottom - this.visibleTop) / 2 + marginHeight) / line.height;
+                      top = targetFrac - spaceFrac;
+                      bot = targetFrac + spaceFrac;
                   }
                   else {
-                      break;
+                      top = (this.visibleTop - line.top - marginHeight) / line.height;
+                      bot = (this.visibleBottom - line.top + marginHeight) / line.height;
                   }
-              }
-              else if (before < after) {
-                  let next = nodes[i++];
-                  if (next)
-                      before += next.size;
+                  viewFrom = findPosition(structure, top);
+                  viewTo = findPosition(structure, bot);
               }
               else {
-                  let next = nodes[--j];
-                  if (next)
-                      after += next.size;
+                  let totalWidth = structure.total * this.heightOracle.charWidth;
+                  let marginWidth = margin * this.heightOracle.charWidth;
+                  let left, right;
+                  if (target != null) {
+                      let targetFrac = findFraction(structure, target);
+                      let spaceFrac = ((this.pixelViewport.right - this.pixelViewport.left) / 2 + marginWidth) / totalWidth;
+                      left = targetFrac - spaceFrac;
+                      right = targetFrac + spaceFrac;
+                  }
+                  else {
+                      left = (this.pixelViewport.left - marginWidth) / totalWidth;
+                      right = (this.pixelViewport.right + marginWidth) / totalWidth;
+                  }
+                  viewFrom = findPosition(structure, left);
+                  viewTo = findPosition(structure, right);
               }
+              if (viewFrom > line.from)
+                  addGap(line.from, viewFrom, line, structure);
+              if (viewTo < line.to)
+                  addGap(viewTo, line.to, line, structure);
           }
-          let brk = 0;
-          if (nodes[i - 1] == null) {
-              brk = 1;
-              i--;
+          return gaps;
+      }
+      gapSize(line, from, to, structure) {
+          let fraction = findFraction(structure, to) - findFraction(structure, from);
+          if (this.heightOracle.lineWrapping) {
+              return line.height * fraction;
           }
-          else if (nodes[i] == null) {
-              brk = 1;
-              j++;
+          else {
+              return structure.total * this.heightOracle.charWidth * fraction;
           }
-          return new HeightMapBranch(HeightMap.of(nodes.slice(0, i)), brk, HeightMap.of(nodes.slice(j)));
       }
-  }
-  HeightMap.prototype.size = 1;
-  class HeightMapBlock extends HeightMap {
-      constructor(length, height, type) {
-          super(length, height);
-          this.type = type;
+      updateLineGaps(gaps) {
+          if (!LineGap.same(gaps, this.lineGaps)) {
+              this.lineGaps = gaps;
+              this.lineGapDeco = Decoration.set(gaps.map(gap => gap.draw(this.heightOracle.lineWrapping)));
+          }
+      }
+      computeVisibleRanges() {
+          let deco = this.stateDeco;
+          if (this.lineGaps.length)
+              deco = deco.concat(this.lineGapDeco);
+          let ranges = [];
+          RangeSet.spans(deco, this.viewport.from, this.viewport.to, {
+              span(from, to) { ranges.push({ from, to }); },
+              point() { }
+          }, 20);
+          let changed = ranges.length != this.visibleRanges.length ||
+              this.visibleRanges.some((r, i) => r.from != ranges[i].from || r.to != ranges[i].to);
+          this.visibleRanges = ranges;
+          return changed ? 4 /* Viewport */ : 0;
       }
-      blockAt(_height, _doc, top, offset) {
-          return new BlockInfo(offset, this.length, top, this.height, this.type);
+      lineBlockAt(pos) {
+          return (pos >= this.viewport.from && pos <= this.viewport.to && this.viewportLines.find(b => b.from <= pos && b.to >= pos)) ||
+              scaleBlock(this.heightMap.lineAt(pos, QueryType.ByPos, this.heightOracle, 0, 0), this.scaler);
       }
-      lineAt(_value, _type, doc, top, offset) {
-          return this.blockAt(0, doc, top, offset);
+      lineBlockAtHeight(height) {
+          return scaleBlock(this.heightMap.lineAt(this.scaler.fromDOM(height), QueryType.ByHeight, this.heightOracle, 0, 0), this.scaler);
       }
-      forEachLine(from, to, doc, top, offset, f) {
-          if (from <= offset + this.length && to >= offset)
-              f(this.blockAt(0, doc, top, offset));
+      elementAtHeight(height) {
+          return scaleBlock(this.heightMap.blockAt(this.scaler.fromDOM(height), this.heightOracle, 0, 0), this.scaler);
       }
-      updateHeight(oracle, offset = 0, _force = false, measured) {
-          if (measured && measured.from <= offset && measured.more)
-              this.setHeight(oracle, measured.heights[measured.index++]);
-          this.outdated = false;
-          return this;
+      get docHeight() {
+          return this.scaler.toDOM(this.heightMap.height);
+      }
+      get contentHeight() {
+          return this.docHeight + this.paddingTop + this.paddingBottom;
       }
-      toString() { return `block(${this.length})`; }
   }
-  class HeightMapText extends HeightMapBlock {
-      constructor(length, height) {
-          super(length, height, BlockType.Text);
-          this.collapsed = 0; // Amount of collapsed content in the line
-          this.widgetHeight = 0; // Maximum inline widget height
+  class Viewport {
+      constructor(from, to) {
+          this.from = from;
+          this.to = to;
       }
-      replace(_from, _to, nodes) {
-          let node = nodes[0];
-          if (nodes.length == 1 && (node instanceof HeightMapText || node instanceof HeightMapGap && (node.flags & 4 /* Flag.SingleLine */)) &&
-              Math.abs(this.length - node.length) < 10) {
-              if (node instanceof HeightMapGap)
-                  node = new HeightMapText(node.length, this.height);
-              else
-                  node.height = this.height;
-              if (!this.outdated)
-                  node.outdated = false;
-              return node;
-          }
-          else {
-              return HeightMap.of(nodes);
+  }
+  function lineStructure(from, to, stateDeco) {
+      let ranges = [], pos = from, total = 0;
+      RangeSet.spans(stateDeco, from, to, {
+          span() { },
+          point(from, to) {
+              if (from > pos) {
+                  ranges.push({ from: pos, to: from });
+                  total += from - pos;
+              }
+              pos = to;
           }
+      }, 20); // We're only interested in collapsed ranges of a significant size
+      if (pos < to) {
+          ranges.push({ from: pos, to });
+          total += to - pos;
       }
-      updateHeight(oracle, offset = 0, force = false, measured) {
-          if (measured && measured.from <= offset && measured.more)
-              this.setHeight(oracle, measured.heights[measured.index++]);
-          else if (force || this.outdated)
-              this.setHeight(oracle, Math.max(this.widgetHeight, oracle.heightForLine(this.length - this.collapsed)));
-          this.outdated = false;
-          return this;
-      }
-      toString() {
-          return `line(${this.length}${this.collapsed ? -this.collapsed : ""}${this.widgetHeight ? ":" + this.widgetHeight : ""})`;
+      return { total, ranges };
+  }
+  function findPosition({ total, ranges }, ratio) {
+      if (ratio <= 0)
+          return ranges[0].from;
+      if (ratio >= 1)
+          return ranges[ranges.length - 1].to;
+      let dist = Math.floor(total * ratio);
+      for (let i = 0;; i++) {
+          let { from, to } = ranges[i], size = to - from;
+          if (dist <= size)
+              return from + dist;
+          dist -= size;
       }
   }
-  class HeightMapGap extends HeightMap {
-      constructor(length) { super(length, 0); }
-      lines(doc, offset) {
-          let firstLine = doc.lineAt(offset).number, lastLine = doc.lineAt(offset + this.length).number;
-          return { firstLine, lastLine, lineHeight: this.height / (lastLine - firstLine + 1) };
+  function findFraction(structure, pos) {
+      let counted = 0;
+      for (let { from, to } of structure.ranges) {
+          if (pos <= to) {
+              counted += pos - from;
+              break;
+          }
+          counted += to - from;
       }
-      blockAt(height, doc, top, offset) {
-          let { firstLine, lastLine, lineHeight } = this.lines(doc, offset);
-          let line = Math.max(0, Math.min(lastLine - firstLine, Math.floor((height - top) / lineHeight)));
-          let { from, length } = doc.line(firstLine + line);
-          return new BlockInfo(from, length, top + lineHeight * line, lineHeight, BlockType.Text);
+      return counted / structure.total;
+  }
+  function find(array, f) {
+      for (let val of array)
+          if (f(val))
+              return val;
+      return undefined;
+  }
+  // Don't scale when the document height is within the range of what
+  // the DOM can handle.
+  const IdScaler = {
+      toDOM(n) { return n; },
+      fromDOM(n) { return n; },
+      scale: 1
+  };
+  // When the height is too big (> VP.MaxDOMHeight), scale down the
+  // regions outside the viewports so that the total height is
+  // VP.MaxDOMHeight.
+  class BigScaler {
+      constructor(oracle, heightMap, viewports) {
+          let vpHeight = 0, base = 0, domBase = 0;
+          this.viewports = viewports.map(({ from, to }) => {
+              let top = heightMap.lineAt(from, QueryType.ByPos, oracle, 0, 0).top;
+              let bottom = heightMap.lineAt(to, QueryType.ByPos, oracle, 0, 0).bottom;
+              vpHeight += bottom - top;
+              return { from, to, top, bottom, domTop: 0, domBottom: 0 };
+          });
+          this.scale = (7000000 /* MaxDOMHeight */ - vpHeight) / (heightMap.height - vpHeight);
+          for (let obj of this.viewports) {
+              obj.domTop = domBase + (obj.top - base) * this.scale;
+              domBase = obj.domBottom = obj.domTop + (obj.bottom - obj.top);
+              base = obj.bottom;
+          }
       }
-      lineAt(value, type, doc, top, offset) {
-          if (type == QueryType.ByHeight)
-              return this.blockAt(value, doc, top, offset);
-          if (type == QueryType.ByPosNoHeight) {
-              let { from, to } = doc.lineAt(value);
-              return new BlockInfo(from, to - from, 0, 0, BlockType.Text);
-          }
-          let { firstLine, lineHeight } = this.lines(doc, offset);
-          let { from, length, number } = doc.lineAt(value);
-          return new BlockInfo(from, length, top + lineHeight * (number - firstLine), lineHeight, BlockType.Text);
-      }
-      forEachLine(from, to, doc, top, offset, f) {
-          let { firstLine, lineHeight } = this.lines(doc, offset);
-          for (let pos = Math.max(from, offset), end = Math.min(offset + this.length, to); pos <= end;) {
-              let line = doc.lineAt(pos);
-              if (pos == from)
-                  top += lineHeight * (line.number - firstLine);
-              f(new BlockInfo(line.from, line.length, top, lineHeight, BlockType.Text));
-              top += lineHeight;
-              pos = line.to + 1;
+      toDOM(n) {
+          for (let i = 0, base = 0, domBase = 0;; i++) {
+              let vp = i < this.viewports.length ? this.viewports[i] : null;
+              if (!vp || n < vp.top)
+                  return domBase + (n - base) * this.scale;
+              if (n <= vp.bottom)
+                  return vp.domTop + (n - vp.top);
+              base = vp.bottom;
+              domBase = vp.domBottom;
           }
       }
-      replace(from, to, nodes) {
-          let after = this.length - to;
-          if (after > 0) {
-              let last = nodes[nodes.length - 1];
-              if (last instanceof HeightMapGap)
-                  nodes[nodes.length - 1] = new HeightMapGap(last.length + after);
-              else
-                  nodes.push(null, new HeightMapGap(after - 1));
-          }
-          if (from > 0) {
-              let first = nodes[0];
-              if (first instanceof HeightMapGap)
-                  nodes[0] = new HeightMapGap(from + first.length);
-              else
-                  nodes.unshift(new HeightMapGap(from - 1), null);
+      fromDOM(n) {
+          for (let i = 0, base = 0, domBase = 0;; i++) {
+              let vp = i < this.viewports.length ? this.viewports[i] : null;
+              if (!vp || n < vp.domTop)
+                  return base + (n - domBase) / this.scale;
+              if (n <= vp.domBottom)
+                  return vp.top + (n - vp.domTop);
+              base = vp.bottom;
+              domBase = vp.domBottom;
           }
-          return HeightMap.of(nodes);
-      }
-      decomposeLeft(to, result) {
-          result.push(new HeightMapGap(to - 1), null);
       }
-      decomposeRight(from, result) {
-          result.push(null, new HeightMapGap(this.length - from - 1));
-      }
-      updateHeight(oracle, offset = 0, force = false, measured) {
-          let end = offset + this.length;
-          if (measured && measured.from <= offset + this.length && measured.more) {
-              // Fill in part of this gap with measured lines. We know there
-              // can't be widgets or collapsed ranges in those lines, because
-              // they would already have been added to the heightmap (gaps
-              // only contain plain text).
-              let nodes = [], pos = Math.max(offset, measured.from), singleHeight = -1;
-              let wasChanged = oracle.heightChanged;
-              if (measured.from > offset)
-                  nodes.push(new HeightMapGap(measured.from - offset - 1).updateHeight(oracle, offset));
-              while (pos <= end && measured.more) {
-                  let len = oracle.doc.lineAt(pos).length;
-                  if (nodes.length)
-                      nodes.push(null);
-                  let height = measured.heights[measured.index++];
-                  if (singleHeight == -1)
-                      singleHeight = height;
-                  else if (Math.abs(height - singleHeight) >= Epsilon)
-                      singleHeight = -2;
-                  let line = new HeightMapText(len, height);
-                  line.outdated = false;
-                  nodes.push(line);
-                  pos += len + 1;
-              }
-              if (pos <= end)
-                  nodes.push(null, new HeightMapGap(end - pos).updateHeight(oracle, pos));
-              let result = HeightMap.of(nodes);
-              oracle.heightChanged = wasChanged || singleHeight < 0 || Math.abs(result.height - this.height) >= Epsilon ||
-                  Math.abs(singleHeight - this.lines(oracle.doc, offset).lineHeight) >= Epsilon;
-              return result;
-          }
-          else if (force || this.outdated) {
-              this.setHeight(oracle, oracle.heightForGap(offset, offset + this.length));
-              this.outdated = false;
+  }
+  function scaleBlock(block, scaler) {
+      if (scaler.scale == 1)
+          return block;
+      let bTop = scaler.toDOM(block.top), bBottom = scaler.toDOM(block.bottom);
+      return new BlockInfo(block.from, block.length, bTop, bBottom - bTop, Array.isArray(block._content) ? block._content.map(b => scaleBlock(b, scaler)) : block._content);
+  }
+
+  const theme = /*@__PURE__*/Facet.define({ combine: strs => strs.join(" ") });
+  const darkTheme = /*@__PURE__*/Facet.define({ combine: values => values.indexOf(true) > -1 });
+  const baseThemeID = /*@__PURE__*/StyleModule.newName(), baseLightID = /*@__PURE__*/StyleModule.newName(), baseDarkID = /*@__PURE__*/StyleModule.newName();
+  const lightDarkIDs = { "&light": "." + baseLightID, "&dark": "." + baseDarkID };
+  function buildTheme(main, spec, scopes) {
+      return new StyleModule(spec, {
+          finish(sel) {
+              return /&/.test(sel) ? sel.replace(/&\w*/, m => {
+                  if (m == "&")
+                      return main;
+                  if (!scopes || !scopes[m])
+                      throw new RangeError(`Unsupported selector: ${m}`);
+                  return scopes[m];
+              }) : main + " " + sel;
           }
-          return this;
-      }
-      toString() { return `gap(${this.length})`; }
+      });
   }
-  class HeightMapBranch extends HeightMap {
-      constructor(left, brk, right) {
-          super(left.length + brk + right.length, left.height + right.height, brk | (left.outdated || right.outdated ? 2 /* Flag.Outdated */ : 0));
-          this.left = left;
-          this.right = right;
-          this.size = left.size + right.size;
-      }
-      get break() { return this.flags & 1 /* Flag.Break */; }
-      blockAt(height, doc, top, offset) {
-          let mid = top + this.left.height;
-          return height < mid ? this.left.blockAt(height, doc, top, offset)
-              : this.right.blockAt(height, doc, mid, offset + this.left.length + this.break);
-      }
-      lineAt(value, type, doc, top, offset) {
-          let rightTop = top + this.left.height, rightOffset = offset + this.left.length + this.break;
-          let left = type == QueryType.ByHeight ? value < rightTop : value < rightOffset;
-          let base = left ? this.left.lineAt(value, type, doc, top, offset)
-              : this.right.lineAt(value, type, doc, rightTop, rightOffset);
-          if (this.break || (left ? base.to < rightOffset : base.from > rightOffset))
-              return base;
-          let subQuery = type == QueryType.ByPosNoHeight ? QueryType.ByPosNoHeight : QueryType.ByPos;
-          if (left)
-              return base.join(this.right.lineAt(rightOffset, subQuery, doc, rightTop, rightOffset));
-          else
-              return this.left.lineAt(rightOffset, subQuery, doc, top, offset).join(base);
+  const baseTheme$1 = /*@__PURE__*/buildTheme("." + baseThemeID, {
+      "&": {
+          position: "relative !important",
+          boxSizing: "border-box",
+          "&.cm-focused": {
+              // Provide a simple default outline to make sure a focused
+              // editor is visually distinct. Can't leave the default behavior
+              // because that will apply to the content element, which is
+              // inside the scrollable container and doesn't include the
+              // gutters. We also can't use an 'auto' outline, since those
+              // are, for some reason, drawn behind the element content, which
+              // will cause things like the active line background to cover
+              // the outline (#297).
+              outline: "1px dotted #212121"
+          },
+          display: "flex !important",
+          flexDirection: "column"
+      },
+      ".cm-scroller": {
+          display: "flex !important",
+          alignItems: "flex-start !important",
+          fontFamily: "monospace",
+          lineHeight: 1.4,
+          height: "100%",
+          overflowX: "auto",
+          position: "relative",
+          zIndex: 0
+      },
+      ".cm-content": {
+          margin: 0,
+          flexGrow: 2,
+          flexShrink: 0,
+          display: "block",
+          whiteSpace: "pre",
+          wordWrap: "normal",
+          boxSizing: "border-box",
+          padding: "4px 0",
+          outline: "none",
+          "&[contenteditable=true]": {
+              WebkitUserModify: "read-write-plaintext-only",
+          }
+      },
+      ".cm-lineWrapping": {
+          whiteSpace_fallback: "pre-wrap",
+          whiteSpace: "break-spaces",
+          wordBreak: "break-word",
+          overflowWrap: "anywhere",
+          flexShrink: 1
+      },
+      "&light .cm-content": { caretColor: "black" },
+      "&dark .cm-content": { caretColor: "white" },
+      ".cm-line": {
+          display: "block",
+          padding: "0 2px 0 6px"
+      },
+      ".cm-layer": {
+          position: "absolute",
+          left: 0,
+          top: 0,
+          contain: "size style",
+          "& > *": {
+              position: "absolute"
+          }
+      },
+      "&light .cm-selectionBackground": {
+          background: "#d9d9d9"
+      },
+      "&dark .cm-selectionBackground": {
+          background: "#222"
+      },
+      "&light.cm-focused > .cm-scroller > .cm-selectionLayer .cm-selectionBackground": {
+          background: "#d7d4f0"
+      },
+      "&dark.cm-focused > .cm-scroller > .cm-selectionLayer .cm-selectionBackground": {
+          background: "#233"
+      },
+      ".cm-cursorLayer": {
+          pointerEvents: "none"
+      },
+      "&.cm-focused > .cm-scroller > .cm-cursorLayer": {
+          animation: "steps(1) cm-blink 1.2s infinite"
+      },
+      // Two animations defined so that we can switch between them to
+      // restart the animation without forcing another style
+      // recomputation.
+      "@keyframes cm-blink": { "0%": {}, "50%": { opacity: 0 }, "100%": {} },
+      "@keyframes cm-blink2": { "0%": {}, "50%": { opacity: 0 }, "100%": {} },
+      ".cm-cursor, .cm-dropCursor": {
+          borderLeft: "1.2px solid black",
+          marginLeft: "-0.6px",
+          pointerEvents: "none",
+      },
+      ".cm-cursor": {
+          display: "none"
+      },
+      "&dark .cm-cursor": {
+          borderLeftColor: "#444"
+      },
+      ".cm-dropCursor": {
+          position: "absolute"
+      },
+      "&.cm-focused > .cm-scroller > .cm-cursorLayer .cm-cursor": {
+          display: "block"
+      },
+      "&light .cm-activeLine": { backgroundColor: "#cceeff44" },
+      "&dark .cm-activeLine": { backgroundColor: "#99eeff33" },
+      "&light .cm-specialChar": { color: "red" },
+      "&dark .cm-specialChar": { color: "#f78" },
+      ".cm-gutters": {
+          flexShrink: 0,
+          display: "flex",
+          height: "100%",
+          boxSizing: "border-box",
+          left: 0,
+          zIndex: 200
+      },
+      "&light .cm-gutters": {
+          backgroundColor: "#f5f5f5",
+          color: "#6c6c6c",
+          borderRight: "1px solid #ddd"
+      },
+      "&dark .cm-gutters": {
+          backgroundColor: "#333338",
+          color: "#ccc"
+      },
+      ".cm-gutter": {
+          display: "flex !important",
+          flexDirection: "column",
+          flexShrink: 0,
+          boxSizing: "border-box",
+          minHeight: "100%",
+          overflow: "hidden"
+      },
+      ".cm-gutterElement": {
+          boxSizing: "border-box"
+      },
+      ".cm-lineNumbers .cm-gutterElement": {
+          padding: "0 3px 0 5px",
+          minWidth: "20px",
+          textAlign: "right",
+          whiteSpace: "nowrap"
+      },
+      "&light .cm-activeLineGutter": {
+          backgroundColor: "#e2f2ff"
+      },
+      "&dark .cm-activeLineGutter": {
+          backgroundColor: "#222227"
+      },
+      ".cm-panels": {
+          boxSizing: "border-box",
+          position: "sticky",
+          left: 0,
+          right: 0
+      },
+      "&light .cm-panels": {
+          backgroundColor: "#f5f5f5",
+          color: "black"
+      },
+      "&light .cm-panels-top": {
+          borderBottom: "1px solid #ddd"
+      },
+      "&light .cm-panels-bottom": {
+          borderTop: "1px solid #ddd"
+      },
+      "&dark .cm-panels": {
+          backgroundColor: "#333338",
+          color: "white"
+      },
+      ".cm-tab": {
+          display: "inline-block",
+          overflow: "hidden",
+          verticalAlign: "bottom"
+      },
+      ".cm-widgetBuffer": {
+          verticalAlign: "text-top",
+          height: "1em",
+          width: 0,
+          display: "inline"
+      },
+      ".cm-placeholder": {
+          color: "#888",
+          display: "inline-block",
+          verticalAlign: "top",
+      },
+      ".cm-highlightSpace:before": {
+          content: "attr(data-display)",
+          position: "absolute",
+          pointerEvents: "none",
+          color: "#888"
+      },
+      ".cm-highlightTab": {
+          backgroundImage: `url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="200" height="20"><path stroke="%23888" stroke-width="1" fill="none" d="M1 10H196L190 5M190 15L196 10M197 4L197 16"/></svg>')`,
+          backgroundSize: "auto 100%",
+          backgroundPosition: "right 90%",
+          backgroundRepeat: "no-repeat"
+      },
+      ".cm-trailingSpace": {
+          backgroundColor: "#ff332255"
+      },
+      ".cm-button": {
+          verticalAlign: "middle",
+          color: "inherit",
+          fontSize: "70%",
+          padding: ".2em 1em",
+          borderRadius: "1px"
+      },
+      "&light .cm-button": {
+          backgroundImage: "linear-gradient(#eff1f5, #d9d9df)",
+          border: "1px solid #888",
+          "&:active": {
+              backgroundImage: "linear-gradient(#b4b4b4, #d0d3d6)"
+          }
+      },
+      "&dark .cm-button": {
+          backgroundImage: "linear-gradient(#393939, #111)",
+          border: "1px solid #888",
+          "&:active": {
+              backgroundImage: "linear-gradient(#111, #333)"
+          }
+      },
+      ".cm-textfield": {
+          verticalAlign: "middle",
+          color: "inherit",
+          fontSize: "70%",
+          border: "1px solid silver",
+          padding: ".2em .5em"
+      },
+      "&light .cm-textfield": {
+          backgroundColor: "white"
+      },
+      "&dark .cm-textfield": {
+          border: "1px solid #555",
+          backgroundColor: "inherit"
       }
-      forEachLine(from, to, doc, top, offset, f) {
-          let rightTop = top + this.left.height, rightOffset = offset + this.left.length + this.break;
-          if (this.break) {
-              if (from < rightOffset)
-                  this.left.forEachLine(from, to, doc, top, offset, f);
-              if (to >= rightOffset)
-                  this.right.forEachLine(from, to, doc, rightTop, rightOffset, f);
+  }, lightDarkIDs);
+
+  class DOMChange {
+      constructor(view, start, end, typeOver) {
+          this.typeOver = typeOver;
+          this.bounds = null;
+          this.text = "";
+          let { impreciseHead: iHead, impreciseAnchor: iAnchor } = view.docView;
+          if (view.state.readOnly && start > -1) {
+              // Ignore changes when the editor is read-only
+              this.newSel = null;
+          }
+          else if (start > -1 && (this.bounds = view.docView.domBoundsAround(start, end, 0))) {
+              let selPoints = iHead || iAnchor ? [] : selectionPoints(view);
+              let reader = new DOMReader(selPoints, view.state);
+              reader.readRange(this.bounds.startDOM, this.bounds.endDOM);
+              this.text = reader.text;
+              this.newSel = selectionFromPoints(selPoints, this.bounds.from);
           }
           else {
-              let mid = this.lineAt(rightOffset, QueryType.ByPos, doc, top, offset);
-              if (from < mid.from)
-                  this.left.forEachLine(from, mid.from - 1, doc, top, offset, f);
-              if (mid.to >= from && mid.from <= to)
-                  f(mid);
-              if (to > mid.to)
-                  this.right.forEachLine(mid.to + 1, to, doc, rightTop, rightOffset, f);
+              let domSel = view.observer.selectionRange;
+              let head = iHead && iHead.node == domSel.focusNode && iHead.offset == domSel.focusOffset ||
+                  !contains(view.contentDOM, domSel.focusNode)
+                  ? view.state.selection.main.head
+                  : view.docView.posFromDOM(domSel.focusNode, domSel.focusOffset);
+              let anchor = iAnchor && iAnchor.node == domSel.anchorNode && iAnchor.offset == domSel.anchorOffset ||
+                  !contains(view.contentDOM, domSel.anchorNode)
+                  ? view.state.selection.main.anchor
+                  : view.docView.posFromDOM(domSel.anchorNode, domSel.anchorOffset);
+              this.newSel = EditorSelection.single(anchor, head);
           }
       }
-      replace(from, to, nodes) {
-          let rightStart = this.left.length + this.break;
-          if (to < rightStart)
-              return this.balanced(this.left.replace(from, to, nodes), this.right);
-          if (from > this.left.length)
-              return this.balanced(this.left, this.right.replace(from - rightStart, to - rightStart, nodes));
-          let result = [];
-          if (from > 0)
-              this.decomposeLeft(from, result);
-          let left = result.length;
-          for (let node of nodes)
-              result.push(node);
-          if (from > 0)
-              mergeGaps(result, left - 1);
-          if (to < this.length) {
-              let right = result.length;
-              this.decomposeRight(to, result);
-              mergeGaps(result, right);
+  }
+  function applyDOMChange(view, domChange) {
+      let change;
+      let { newSel } = domChange, sel = view.state.selection.main;
+      let lastKey = view.inputState.lastKeyTime > Date.now() - 100 ? view.inputState.lastKeyCode : -1;
+      if (domChange.bounds) {
+          let { from, to } = domChange.bounds;
+          let preferredPos = sel.from, preferredSide = null;
+          // Prefer anchoring to end when Backspace is pressed (or, on
+          // Android, when something was deleted)
+          if (lastKey === 8 || browser.android && domChange.text.length < to - from) {
+              preferredPos = sel.to;
+              preferredSide = "end";
           }
-          return HeightMap.of(result);
-      }
-      decomposeLeft(to, result) {
-          let left = this.left.length;
-          if (to <= left)
-              return this.left.decomposeLeft(to, result);
-          result.push(this.left);
-          if (this.break) {
-              left++;
-              if (to >= left)
-                  result.push(null);
+          let diff = findDiff(view.state.doc.sliceString(from, to, LineBreakPlaceholder), domChange.text, preferredPos - from, preferredSide);
+          if (diff) {
+              // Chrome inserts two newlines when pressing shift-enter at the
+              // end of a line. DomChange drops one of those.
+              if (browser.chrome && lastKey == 13 &&
+                  diff.toB == diff.from + 2 && domChange.text.slice(diff.from, diff.toB) == LineBreakPlaceholder + LineBreakPlaceholder)
+                  diff.toB--;
+              change = { from: from + diff.from, to: from + diff.toA,
+                  insert: Text$1.of(domChange.text.slice(diff.from, diff.toB).split(LineBreakPlaceholder)) };
           }
-          if (to > left)
-              this.right.decomposeLeft(to - left, result);
       }
-      decomposeRight(from, result) {
-          let left = this.left.length, right = left + this.break;
-          if (from >= right)
-              return this.right.decomposeRight(from - right, result);
-          if (from < left)
-              this.left.decomposeRight(from, result);
-          if (this.break && from < right)
-              result.push(null);
-          result.push(this.right);
+      else if (newSel && (!view.hasFocus && view.state.facet(editable) || newSel.main.eq(sel))) {
+          newSel = null;
       }
-      balanced(left, right) {
-          if (left.size > 2 * right.size || right.size > 2 * left.size)
-              return HeightMap.of(this.break ? [left, null, right] : [left, right]);
-          this.left = left;
-          this.right = right;
-          this.height = left.height + right.height;
-          this.outdated = left.outdated || right.outdated;
-          this.size = left.size + right.size;
-          this.length = left.length + this.break + right.length;
-          return this;
+      if (!change && !newSel)
+          return false;
+      if (!change && domChange.typeOver && !sel.empty && newSel && newSel.main.empty) {
+          // Heuristic to notice typing over a selected character
+          change = { from: sel.from, to: sel.to, insert: view.state.doc.slice(sel.from, sel.to) };
       }
-      updateHeight(oracle, offset = 0, force = false, measured) {
-          let { left, right } = this, rightStart = offset + left.length + this.break, rebalance = null;
-          if (measured && measured.from <= offset + left.length && measured.more)
-              rebalance = left = left.updateHeight(oracle, offset, force, measured);
-          else
-              left.updateHeight(oracle, offset, force);
-          if (measured && measured.from <= rightStart + right.length && measured.more)
-              rebalance = right = right.updateHeight(oracle, rightStart, force, measured);
-          else
-              right.updateHeight(oracle, rightStart, force);
-          if (rebalance)
-              return this.balanced(left, right);
-          this.height = this.left.height + this.right.height;
-          this.outdated = false;
-          return this;
+      else if (change && change.from >= sel.from && change.to <= sel.to &&
+          (change.from != sel.from || change.to != sel.to) &&
+          (sel.to - sel.from) - (change.to - change.from) <= 4) {
+          // If the change is inside the selection and covers most of it,
+          // assume it is a selection replace (with identical characters at
+          // the start/end not included in the diff)
+          change = {
+              from: sel.from, to: sel.to,
+              insert: view.state.doc.slice(sel.from, change.from).append(change.insert).append(view.state.doc.slice(change.to, sel.to))
+          };
       }
-      toString() { return this.left + (this.break ? " " : "-") + this.right; }
-  }
-  function mergeGaps(nodes, around) {
-      let before, after;
-      if (nodes[around] == null &&
-          (before = nodes[around - 1]) instanceof HeightMapGap &&
-          (after = nodes[around + 1]) instanceof HeightMapGap)
-          nodes.splice(around - 1, 3, new HeightMapGap(before.length + 1 + after.length));
-  }
-  const relevantWidgetHeight = 5;
-  class NodeBuilder {
-      constructor(pos, oracle) {
-          this.pos = pos;
-          this.oracle = oracle;
-          this.nodes = [];
-          this.lineStart = -1;
-          this.lineEnd = -1;
-          this.covering = null;
-          this.writtenTo = pos;
+      else if ((browser.mac || browser.android) && change && change.from == change.to && change.from == sel.head - 1 &&
+          /^\. ?$/.test(change.insert.toString()) && view.contentDOM.getAttribute("autocorrect") == "off") {
+          // Detect insert-period-on-double-space Mac and Android behavior,
+          // and transform it into a regular space insert.
+          if (newSel && change.insert.length == 2)
+              newSel = EditorSelection.single(newSel.main.anchor - 1, newSel.main.head - 1);
+          change = { from: sel.from, to: sel.to, insert: Text$1.of([" "]) };
       }
-      get isCovered() {
-          return this.covering && this.nodes[this.nodes.length - 1] == this.covering;
+      else if (browser.chrome && change && change.from == change.to && change.from == sel.head &&
+          change.insert.toString() == "\n " && view.lineWrapping) {
+          // In Chrome, if you insert a space at the start of a wrapped
+          // line, it will actually insert a newline and a space, causing a
+          // bogus new line to be created in CodeMirror (#968)
+          if (newSel)
+              newSel = EditorSelection.single(newSel.main.anchor - 1, newSel.main.head - 1);
+          change = { from: sel.from, to: sel.to, insert: Text$1.of([" "]) };
       }
-      span(_from, to) {
-          if (this.lineStart > -1) {
-              let end = Math.min(to, this.lineEnd), last = this.nodes[this.nodes.length - 1];
-              if (last instanceof HeightMapText)
-                  last.length += end - this.pos;
-              else if (end > this.pos || !this.isCovered)
-                  this.nodes.push(new HeightMapText(end - this.pos, -1));
-              this.writtenTo = end;
-              if (to > end) {
-                  this.nodes.push(null);
-                  this.writtenTo++;
-                  this.lineStart = -1;
-              }
+      if (change) {
+          let startState = view.state;
+          if (browser.ios && view.inputState.flushIOSKey(view))
+              return true;
+          // Android browsers don't fire reasonable key events for enter,
+          // backspace, or delete. So this detects changes that look like
+          // they're caused by those keys, and reinterprets them as key
+          // events. (Some of these keys are also handled by beforeinput
+          // events and the pendingAndroidKey mechanism, but that's not
+          // reliable in all situations.)
+          if (browser.android &&
+              ((change.from == sel.from && change.to == sel.to &&
+                  change.insert.length == 1 && change.insert.lines == 2 &&
+                  dispatchKey(view.contentDOM, "Enter", 13)) ||
+                  ((change.from == sel.from - 1 && change.to == sel.to && change.insert.length == 0 ||
+                      lastKey == 8 && change.insert.length < change.to - change.from) &&
+                      dispatchKey(view.contentDOM, "Backspace", 8)) ||
+                  (change.from == sel.from && change.to == sel.to + 1 && change.insert.length == 0 &&
+                      dispatchKey(view.contentDOM, "Delete", 46))))
+              return true;
+          let text = change.insert.toString();
+          if (view.state.facet(inputHandler).some(h => h(view, change.from, change.to, text)))
+              return true;
+          if (view.inputState.composing >= 0)
+              view.inputState.composing++;
+          let tr;
+          if (change.from >= sel.from && change.to <= sel.to && change.to - change.from >= (sel.to - sel.from) / 3 &&
+              (!newSel || newSel.main.empty && newSel.main.from == change.from + change.insert.length) &&
+              view.inputState.composing < 0) {
+              let before = sel.from < change.from ? startState.sliceDoc(sel.from, change.from) : "";
+              let after = sel.to > change.to ? startState.sliceDoc(change.to, sel.to) : "";
+              tr = startState.replaceSelection(view.state.toText(before + change.insert.sliceString(0, undefined, view.state.lineBreak) + after));
           }
-          this.pos = to;
-      }
-      point(from, to, deco) {
-          if (from < to || deco.heightRelevant) {
-              let height = deco.widget ? deco.widget.estimatedHeight : 0;
-              if (height < 0)
-                  height = this.oracle.lineHeight;
-              let len = to - from;
-              if (deco.block) {
-                  this.addBlock(new HeightMapBlock(len, height, deco.type));
+          else {
+              let changes = startState.changes(change);
+              let mainSel = newSel && newSel.main.to <= changes.newLength ? newSel.main : undefined;
+              // Try to apply a composition change to all cursors
+              if (startState.selection.ranges.length > 1 && view.inputState.composing >= 0 &&
+                  change.to <= sel.to && change.to >= sel.to - 10) {
+                  let replaced = view.state.sliceDoc(change.from, change.to);
+                  let compositionRange = compositionSurroundingNode(view) || view.state.doc.lineAt(sel.head);
+                  let offset = sel.to - change.to, size = sel.to - sel.from;
+                  tr = startState.changeByRange(range => {
+                      if (range.from == sel.from && range.to == sel.to)
+                          return { changes, range: mainSel || range.map(changes) };
+                      let to = range.to - offset, from = to - replaced.length;
+                      if (range.to - range.from != size || view.state.sliceDoc(from, to) != replaced ||
+                          // Unfortunately, there's no way to make multiple
+                          // changes in the same node work without aborting
+                          // composition, so cursors in the composition range are
+                          // ignored.
+                          compositionRange && range.to >= compositionRange.from && range.from <= compositionRange.to)
+                          return { range };
+                      let rangeChanges = startState.changes({ from, to, insert: change.insert }), selOff = range.to - sel.to;
+                      return {
+                          changes: rangeChanges,
+                          range: !mainSel ? range.map(rangeChanges) :
+                              EditorSelection.range(Math.max(0, mainSel.anchor + selOff), Math.max(0, mainSel.head + selOff))
+                      };
+                  });
               }
-              else if (len || height >= relevantWidgetHeight) {
-                  this.addLineDeco(height, len);
+              else {
+                  tr = {
+                      changes,
+                      selection: mainSel && startState.selection.replaceRange(mainSel)
+                  };
               }
           }
-          else if (to > from) {
-              this.span(from, to);
+          let userEvent = "input.type";
+          if (view.composing ||
+              view.inputState.compositionPendingChange && view.inputState.compositionEndedAt > Date.now() - 50) {
+              view.inputState.compositionPendingChange = false;
+              userEvent += ".compose";
+              if (view.inputState.compositionFirstChange) {
+                  userEvent += ".start";
+                  view.inputState.compositionFirstChange = false;
+              }
           }
-          if (this.lineEnd > -1 && this.lineEnd < this.pos)
-              this.lineEnd = this.oracle.doc.lineAt(this.pos).to;
+          view.dispatch(tr, { scrollIntoView: true, userEvent });
+          return true;
       }
-      enterLine() {
-          if (this.lineStart > -1)
-              return;
-          let { from, to } = this.oracle.doc.lineAt(this.pos);
-          this.lineStart = from;
-          this.lineEnd = to;
-          if (this.writtenTo < from) {
-              if (this.writtenTo < from - 1 || this.nodes[this.nodes.length - 1] == null)
-                  this.nodes.push(this.blankContent(this.writtenTo, from - 1));
-              this.nodes.push(null);
+      else if (newSel && !newSel.main.eq(sel)) {
+          let scrollIntoView = false, userEvent = "select";
+          if (view.inputState.lastSelectionTime > Date.now() - 50) {
+              if (view.inputState.lastSelectionOrigin == "select")
+                  scrollIntoView = true;
+              userEvent = view.inputState.lastSelectionOrigin;
           }
-          if (this.pos > from)
-              this.nodes.push(new HeightMapText(this.pos - from, -1));
-          this.writtenTo = this.pos;
-      }
-      blankContent(from, to) {
-          let gap = new HeightMapGap(to - from);
-          if (this.oracle.doc.lineAt(from).to == to)
-              gap.flags |= 4 /* Flag.SingleLine */;
-          return gap;
+          view.dispatch({ selection: newSel, scrollIntoView, userEvent });
+          return true;
       }
-      ensureLine() {
-          this.enterLine();
-          let last = this.nodes.length ? this.nodes[this.nodes.length - 1] : null;
-          if (last instanceof HeightMapText)
-              return last;
-          let line = new HeightMapText(0, -1);
-          this.nodes.push(line);
-          return line;
+      else {
+          return false;
       }
-      addBlock(block) {
-          this.enterLine();
-          if (block.type == BlockType.WidgetAfter && !this.isCovered)
-              this.ensureLine();
-          this.nodes.push(block);
-          this.writtenTo = this.pos = this.pos + block.length;
-          if (block.type != BlockType.WidgetBefore)
-              this.covering = block;
+  }
+  function findDiff(a, b, preferredPos, preferredSide) {
+      let minLen = Math.min(a.length, b.length);
+      let from = 0;
+      while (from < minLen && a.charCodeAt(from) == b.charCodeAt(from))
+          from++;
+      if (from == minLen && a.length == b.length)
+          return null;
+      let toA = a.length, toB = b.length;
+      while (toA > 0 && toB > 0 && a.charCodeAt(toA - 1) == b.charCodeAt(toB - 1)) {
+          toA--;
+          toB--;
       }
-      addLineDeco(height, length) {
-          let line = this.ensureLine();
-          line.length += length;
-          line.collapsed += length;
-          line.widgetHeight = Math.max(line.widgetHeight, height);
-          this.writtenTo = this.pos = this.pos + length;
+      if (preferredSide == "end") {
+          let adjust = Math.max(0, from - Math.min(toA, toB));
+          preferredPos -= toA + adjust - from;
       }
-      finish(from) {
-          let last = this.nodes.length == 0 ? null : this.nodes[this.nodes.length - 1];
-          if (this.lineStart > -1 && !(last instanceof HeightMapText) && !this.isCovered)
-              this.nodes.push(new HeightMapText(0, -1));
-          else if (this.writtenTo < this.pos || last == null)
-              this.nodes.push(this.blankContent(this.writtenTo, this.pos));
-          let pos = from;
-          for (let node of this.nodes) {
-              if (node instanceof HeightMapText)
-                  node.updateHeight(this.oracle, pos);
-              pos += node ? node.length : 1;
-          }
-          return this.nodes;
+      if (toA < from && a.length < b.length) {
+          let move = preferredPos <= from && preferredPos >= toA ? from - preferredPos : 0;
+          from -= move;
+          toB = from + (toB - toA);
+          toA = from;
       }
-      // Always called with a region that on both sides either stretches
-      // to a line break or the end of the document.
-      // The returned array uses null to indicate line breaks, but never
-      // starts or ends in a line break, or has multiple line breaks next
-      // to each other.
-      static build(oracle, decorations, from, to) {
-          let builder = new NodeBuilder(from, oracle);
-          RangeSet.spans(decorations, from, to, builder, 0);
-          return builder.finish(from);
+      else if (toB < from) {
+          let move = preferredPos <= from && preferredPos >= toB ? from - preferredPos : 0;
+          from -= move;
+          toA = from + (toA - toB);
+          toB = from;
       }
+      return { from, toA, toB };
   }
-  function heightRelevantDecoChanges(a, b, diff) {
-      let comp = new DecorationComparator;
-      RangeSet.compare(a, b, diff, comp, 0);
-      return comp.changes;
-  }
-  class DecorationComparator {
-      constructor() {
-          this.changes = [];
-      }
-      compareRange() { }
-      comparePoint(from, to, a, b) {
-          if (from < to || a && a.heightRelevant || b && b.heightRelevant)
-              addRange(from, to, this.changes, 5);
+  function selectionPoints(view) {
+      let result = [];
+      if (view.root.activeElement != view.contentDOM)
+          return result;
+      let { anchorNode, anchorOffset, focusNode, focusOffset } = view.observer.selectionRange;
+      if (anchorNode) {
+          result.push(new DOMPoint(anchorNode, anchorOffset));
+          if (focusNode != anchorNode || focusOffset != anchorOffset)
+              result.push(new DOMPoint(focusNode, focusOffset));
       }
+      return result;
+  }
+  function selectionFromPoints(points, base) {
+      if (points.length == 0)
+          return null;
+      let anchor = points[0].pos, head = points.length == 2 ? points[1].pos : anchor;
+      return anchor > -1 && head > -1 ? EditorSelection.single(anchor + base, head + base) : null;
   }
 
-  function visiblePixelRange(dom, paddingTop) {
-      let rect = dom.getBoundingClientRect();
-      let doc = dom.ownerDocument, win = doc.defaultView || window;
-      let left = Math.max(0, rect.left), right = Math.min(win.innerWidth, rect.right);
-      let top = Math.max(0, rect.top), bottom = Math.min(win.innerHeight, rect.bottom);
-      for (let parent = dom.parentNode; parent && parent != doc.body;) {
-          if (parent.nodeType == 1) {
-              let elt = parent;
-              let style = window.getComputedStyle(elt);
-              if ((elt.scrollHeight > elt.clientHeight || elt.scrollWidth > elt.clientWidth) &&
-                  style.overflow != "visible") {
-                  let parentRect = elt.getBoundingClientRect();
-                  left = Math.max(left, parentRect.left);
-                  right = Math.min(right, parentRect.right);
-                  top = Math.max(top, parentRect.top);
-                  bottom = parent == dom.parentNode ? parentRect.bottom : Math.min(bottom, parentRect.bottom);
-              }
-              parent = style.position == "absolute" || style.position == "fixed" ? elt.offsetParent : elt.parentNode;
+  const observeOptions = {
+      childList: true,
+      characterData: true,
+      subtree: true,
+      attributes: true,
+      characterDataOldValue: true
+  };
+  // IE11 has very broken mutation observers, so we also listen to
+  // DOMCharacterDataModified there
+  const useCharData = browser.ie && browser.ie_version <= 11;
+  class DOMObserver {
+      constructor(view) {
+          this.view = view;
+          this.active = false;
+          // The known selection. Kept in our own object, as opposed to just
+          // directly accessing the selection because:
+          //  - Safari doesn't report the right selection in shadow DOM
+          //  - Reading from the selection forces a DOM layout
+          //  - This way, we can ignore selectionchange events if we have
+          //    already seen the 'new' selection
+          this.selectionRange = new DOMSelectionState;
+          // Set when a selection change is detected, cleared on flush
+          this.selectionChanged = false;
+          this.delayedFlush = -1;
+          this.resizeTimeout = -1;
+          this.queue = [];
+          this.delayedAndroidKey = null;
+          this.flushingAndroidKey = -1;
+          this.lastChange = 0;
+          this.scrollTargets = [];
+          this.intersection = null;
+          this.resizeScroll = null;
+          this.resizeContent = null;
+          this.intersecting = false;
+          this.gapIntersection = null;
+          this.gaps = [];
+          // Timeout for scheduling check of the parents that need scroll handlers
+          this.parentCheck = -1;
+          this.dom = view.contentDOM;
+          this.observer = new MutationObserver(mutations => {
+              for (let mut of mutations)
+                  this.queue.push(mut);
+              // IE11 will sometimes (on typing over a selection or
+              // backspacing out a single character text node) call the
+              // observer callback before actually updating the DOM.
+              //
+              // Unrelatedly, iOS Safari will, when ending a composition,
+              // sometimes first clear it, deliver the mutations, and then
+              // reinsert the finished text. CodeMirror's handling of the
+              // deletion will prevent the reinsertion from happening,
+              // breaking composition.
+              if ((browser.ie && browser.ie_version <= 11 || browser.ios && view.composing) &&
+                  mutations.some(m => m.type == "childList" && m.removedNodes.length ||
+                      m.type == "characterData" && m.oldValue.length > m.target.nodeValue.length))
+                  this.flushSoon();
+              else
+                  this.flush();
+          });
+          if (useCharData)
+              this.onCharData = (event) => {
+                  this.queue.push({ target: event.target,
+                      type: "characterData",
+                      oldValue: event.prevValue });
+                  this.flushSoon();
+              };
+          this.onSelectionChange = this.onSelectionChange.bind(this);
+          this.onResize = this.onResize.bind(this);
+          this.onPrint = this.onPrint.bind(this);
+          this.onScroll = this.onScroll.bind(this);
+          if (typeof ResizeObserver == "function") {
+              this.resizeScroll = new ResizeObserver(() => {
+                  var _a;
+                  if (((_a = this.view.docView) === null || _a === void 0 ? void 0 : _a.lastUpdate) < Date.now() - 75)
+                      this.onResize();
+              });
+              this.resizeScroll.observe(view.scrollDOM);
+              this.resizeContent = new ResizeObserver(() => this.view.requestMeasure());
+              this.resizeContent.observe(view.contentDOM);
           }
-          else if (parent.nodeType == 11) { // Shadow root
-              parent = parent.host;
+          this.addWindowListeners(this.win = view.win);
+          this.start();
+          if (typeof IntersectionObserver == "function") {
+              this.intersection = new IntersectionObserver(entries => {
+                  if (this.parentCheck < 0)
+                      this.parentCheck = setTimeout(this.listenForScroll.bind(this), 1000);
+                  if (entries.length > 0 && (entries[entries.length - 1].intersectionRatio > 0) != this.intersecting) {
+                      this.intersecting = !this.intersecting;
+                      if (this.intersecting != this.view.inView)
+                          this.onScrollChanged(document.createEvent("Event"));
+                  }
+              }, { threshold: [0, .001] });
+              this.intersection.observe(this.dom);
+              this.gapIntersection = new IntersectionObserver(entries => {
+                  if (entries.length > 0 && entries[entries.length - 1].intersectionRatio > 0)
+                      this.onScrollChanged(document.createEvent("Event"));
+              }, {});
           }
-          else {
-              break;
+          this.listenForScroll();
+          this.readSelectionRange();
+      }
+      onScrollChanged(e) {
+          this.view.inputState.runScrollHandlers(this.view, e);
+          if (this.intersecting)
+              this.view.measure();
+      }
+      onScroll(e) {
+          if (this.intersecting)
+              this.flush(false);
+          this.onScrollChanged(e);
+      }
+      onResize() {
+          if (this.resizeTimeout < 0)
+              this.resizeTimeout = setTimeout(() => {
+                  this.resizeTimeout = -1;
+                  this.view.requestMeasure();
+              }, 50);
+      }
+      onPrint() {
+          this.view.viewState.printing = true;
+          this.view.measure();
+          setTimeout(() => {
+              this.view.viewState.printing = false;
+              this.view.requestMeasure();
+          }, 500);
+      }
+      updateGaps(gaps) {
+          if (this.gapIntersection && (gaps.length != this.gaps.length || this.gaps.some((g, i) => g != gaps[i]))) {
+              this.gapIntersection.disconnect();
+              for (let gap of gaps)
+                  this.gapIntersection.observe(gap);
+              this.gaps = gaps;
           }
       }
-      return { left: left - rect.left, right: Math.max(left, right) - rect.left,
-          top: top - (rect.top + paddingTop), bottom: Math.max(top, bottom) - (rect.top + paddingTop) };
-  }
-  function fullPixelRange(dom, paddingTop) {
-      let rect = dom.getBoundingClientRect();
-      return { left: 0, right: rect.right - rect.left,
-          top: paddingTop, bottom: rect.bottom - (rect.top + paddingTop) };
-  }
-  // Line gaps are placeholder widgets used to hide pieces of overlong
-  // lines within the viewport, as a kludge to keep the editor
-  // responsive when a ridiculously long line is loaded into it.
-  class LineGap {
-      constructor(from, to, size) {
-          this.from = from;
-          this.to = to;
-          this.size = size;
+      onSelectionChange(event) {
+          let wasChanged = this.selectionChanged;
+          if (!this.readSelectionRange() || this.delayedAndroidKey)
+              return;
+          let { view } = this, sel = this.selectionRange;
+          if (view.state.facet(editable) ? view.root.activeElement != this.dom : !hasSelection(view.dom, sel))
+              return;
+          let context = sel.anchorNode && view.docView.nearest(sel.anchorNode);
+          if (context && context.ignoreEvent(event)) {
+              if (!wasChanged)
+                  this.selectionChanged = false;
+              return;
+          }
+          // Deletions on IE11 fire their events in the wrong order, giving
+          // us a selection change event before the DOM changes are
+          // reported.
+          // Chrome Android has a similar issue when backspacing out a
+          // selection (#645).
+          if ((browser.ie && browser.ie_version <= 11 || browser.android && browser.chrome) && !view.state.selection.main.empty &&
+              // (Selection.isCollapsed isn't reliable on IE)
+              sel.focusNode && isEquivalentPosition(sel.focusNode, sel.focusOffset, sel.anchorNode, sel.anchorOffset))
+              this.flushSoon();
+          else
+              this.flush(false);
       }
-      static same(a, b) {
-          if (a.length != b.length)
+      readSelectionRange() {
+          let { view } = this;
+          // The Selection object is broken in shadow roots in Safari. See
+          // https://github.com/codemirror/dev/issues/414
+          let range = browser.safari && view.root.nodeType == 11 &&
+              deepActiveElement(this.dom.ownerDocument) == this.dom &&
+              safariSelectionRangeHack(this.view) || getSelection(view.root);
+          if (!range || this.selectionRange.eq(range))
+              return false;
+          let local = hasSelection(this.dom, range);
+          // Detect the situation where the browser has, on focus, moved the
+          // selection to the start of the content element. Reset it to the
+          // position from the editor state.
+          if (local && !this.selectionChanged &&
+              view.inputState.lastFocusTime > Date.now() - 200 &&
+              view.inputState.lastTouchTime < Date.now() - 300 &&
+              atElementStart(this.dom, range)) {
+              this.view.inputState.lastFocusTime = 0;
+              view.docView.updateSelection();
               return false;
-          for (let i = 0; i < a.length; i++) {
-              let gA = a[i], gB = b[i];
-              if (gA.from != gB.from || gA.to != gB.to || gA.size != gB.size)
-                  return false;
           }
+          this.selectionRange.setRange(range);
+          if (local)
+              this.selectionChanged = true;
           return true;
       }
-      draw(wrapping) {
-          return Decoration.replace({ widget: new LineGapWidget(this.size, wrapping) }).range(this.from, this.to);
+      setSelectionRange(anchor, head) {
+          this.selectionRange.set(anchor.node, anchor.offset, head.node, head.offset);
+          this.selectionChanged = false;
       }
-  }
-  class LineGapWidget extends WidgetType {
-      constructor(size, vertical) {
-          super();
-          this.size = size;
-          this.vertical = vertical;
+      clearSelectionRange() {
+          this.selectionRange.set(null, 0, null, 0);
       }
-      eq(other) { return other.size == this.size && other.vertical == this.vertical; }
-      toDOM() {
-          let elt = document.createElement("div");
-          if (this.vertical) {
-              elt.style.height = this.size + "px";
+      listenForScroll() {
+          this.parentCheck = -1;
+          let i = 0, changed = null;
+          for (let dom = this.dom; dom;) {
+              if (dom.nodeType == 1) {
+                  if (!changed && i < this.scrollTargets.length && this.scrollTargets[i] == dom)
+                      i++;
+                  else if (!changed)
+                      changed = this.scrollTargets.slice(0, i);
+                  if (changed)
+                      changed.push(dom);
+                  dom = dom.assignedSlot || dom.parentNode;
+              }
+              else if (dom.nodeType == 11) { // Shadow root
+                  dom = dom.host;
+              }
+              else {
+                  break;
+              }
           }
-          else {
-              elt.style.width = this.size + "px";
-              elt.style.height = "2px";
-              elt.style.display = "inline-block";
+          if (i < this.scrollTargets.length && !changed)
+              changed = this.scrollTargets.slice(0, i);
+          if (changed) {
+              for (let dom of this.scrollTargets)
+                  dom.removeEventListener("scroll", this.onScroll);
+              for (let dom of this.scrollTargets = changed)
+                  dom.addEventListener("scroll", this.onScroll);
           }
-          return elt;
       }
-      get estimatedHeight() { return this.vertical ? this.size : -1; }
-  }
-  class ViewState {
-      constructor(state) {
-          this.state = state;
-          // These are contentDOM-local coordinates
-          this.pixelViewport = { left: 0, right: window.innerWidth, top: 0, bottom: 0 };
-          this.inView = true;
-          this.paddingTop = 0;
-          this.paddingBottom = 0;
-          this.contentDOMWidth = 0;
-          this.contentDOMHeight = 0;
-          this.editorHeight = 0;
-          this.editorWidth = 0;
-          // See VP.MaxDOMHeight
-          this.scaler = IdScaler;
-          this.scrollTarget = null;
-          // Briefly set to true when printing, to disable viewport limiting
-          this.printing = false;
-          // Flag set when editor content was redrawn, so that the next
-          // measure stage knows it must read DOM layout
-          this.mustMeasureContent = true;
-          this.defaultTextDirection = Direction.LTR;
-          this.visibleRanges = [];
-          // Cursor 'assoc' is only significant when the cursor is on a line
-          // wrap point, where it must stick to the character that it is
-          // associated with. Since browsers don't provide a reasonable
-          // interface to set or query this, when a selection is set that
-          // might cause this to be significant, this flag is set. The next
-          // measure phase will check whether the cursor is on a line-wrapping
-          // boundary and, if so, reset it to make sure it is positioned in
-          // the right place.
-          this.mustEnforceCursorAssoc = false;
-          let guessWrapping = state.facet(contentAttributes).some(v => typeof v != "function" && v.class == "cm-lineWrapping");
-          this.heightOracle = new HeightOracle(guessWrapping);
-          this.stateDeco = state.facet(decorations).filter(d => typeof d != "function");
-          this.heightMap = HeightMap.empty().applyChanges(this.stateDeco, Text$1.empty, this.heightOracle.setDoc(state.doc), [new ChangedRange(0, 0, 0, state.doc.length)]);
-          this.viewport = this.getViewport(0, null);
-          this.updateViewportLines();
-          this.updateForViewport();
-          this.lineGaps = this.ensureLineGaps([]);
-          this.lineGapDeco = Decoration.set(this.lineGaps.map(gap => gap.draw(false)));
-          this.computeVisibleRanges();
-      }
-      updateForViewport() {
-          let viewports = [this.viewport], { main } = this.state.selection;
-          for (let i = 0; i <= 1; i++) {
-              let pos = i ? main.head : main.anchor;
-              if (!viewports.some(({ from, to }) => pos >= from && pos <= to)) {
-                  let { from, to } = this.lineBlockAt(pos);
-                  viewports.push(new Viewport(from, to));
-              }
+      ignore(f) {
+          if (!this.active)
+              return f();
+          try {
+              this.stop();
+              return f();
+          }
+          finally {
+              this.start();
+              this.clear();
           }
-          this.viewports = viewports.sort((a, b) => a.from - b.from);
-          this.scaler = this.heightMap.height <= 7000000 /* VP.MaxDOMHeight */ ? IdScaler :
-              new BigScaler(this.heightOracle.doc, this.heightMap, this.viewports);
       }
-      updateViewportLines() {
-          this.viewportLines = [];
-          this.heightMap.forEachLine(this.viewport.from, this.viewport.to, this.state.doc, 0, 0, block => {
-              this.viewportLines.push(this.scaler.scale == 1 ? block : scaleBlock(block, this.scaler));
-          });
+      start() {
+          if (this.active)
+              return;
+          this.observer.observe(this.dom, observeOptions);
+          if (useCharData)
+              this.dom.addEventListener("DOMCharacterDataModified", this.onCharData);
+          this.active = true;
       }
-      update(update, scrollTarget = null) {
-          this.state = update.state;
-          let prevDeco = this.stateDeco;
-          this.stateDeco = this.state.facet(decorations).filter(d => typeof d != "function");
-          let contentChanges = update.changedRanges;
-          let heightChanges = ChangedRange.extendWithRanges(contentChanges, heightRelevantDecoChanges(prevDeco, this.stateDeco, update ? update.changes : ChangeSet.empty(this.state.doc.length)));
-          let prevHeight = this.heightMap.height;
-          this.heightMap = this.heightMap.applyChanges(this.stateDeco, update.startState.doc, this.heightOracle.setDoc(this.state.doc), heightChanges);
-          if (this.heightMap.height != prevHeight)
-              update.flags |= 2 /* UpdateFlag.Height */;
-          let viewport = heightChanges.length ? this.mapViewport(this.viewport, update.changes) : this.viewport;
-          if (scrollTarget && (scrollTarget.range.head < viewport.from || scrollTarget.range.head > viewport.to) ||
-              !this.viewportIsAppropriate(viewport))
-              viewport = this.getViewport(0, scrollTarget);
-          let updateLines = !update.changes.empty || (update.flags & 2 /* UpdateFlag.Height */) ||
-              viewport.from != this.viewport.from || viewport.to != this.viewport.to;
-          this.viewport = viewport;
-          this.updateForViewport();
-          if (updateLines)
-              this.updateViewportLines();
-          if (this.lineGaps.length || this.viewport.to - this.viewport.from > (2000 /* LG.Margin */ << 1))
-              this.updateLineGaps(this.ensureLineGaps(this.mapLineGaps(this.lineGaps, update.changes)));
-          update.flags |= this.computeVisibleRanges();
-          if (scrollTarget)
-              this.scrollTarget = scrollTarget;
-          if (!this.mustEnforceCursorAssoc && update.selectionSet && update.view.lineWrapping &&
-              update.state.selection.main.empty && update.state.selection.main.assoc &&
-              !update.state.facet(nativeSelectionHidden))
-              this.mustEnforceCursorAssoc = true;
+      stop() {
+          if (!this.active)
+              return;
+          this.active = false;
+          this.observer.disconnect();
+          if (useCharData)
+              this.dom.removeEventListener("DOMCharacterDataModified", this.onCharData);
       }
-      measure(view) {
-          let dom = view.contentDOM, style = window.getComputedStyle(dom);
-          let oracle = this.heightOracle;
-          let whiteSpace = style.whiteSpace;
-          this.defaultTextDirection = style.direction == "rtl" ? Direction.RTL : Direction.LTR;
-          let refresh = this.heightOracle.mustRefreshForWrapping(whiteSpace);
-          let measureContent = refresh || this.mustMeasureContent || this.contentDOMHeight != dom.clientHeight;
-          this.contentDOMHeight = dom.clientHeight;
-          this.mustMeasureContent = false;
-          let result = 0, bias = 0;
-          // Vertical padding
-          let paddingTop = parseInt(style.paddingTop) || 0, paddingBottom = parseInt(style.paddingBottom) || 0;
-          if (this.paddingTop != paddingTop || this.paddingBottom != paddingBottom) {
-              this.paddingTop = paddingTop;
-              this.paddingBottom = paddingBottom;
-              result |= 8 /* UpdateFlag.Geometry */ | 2 /* UpdateFlag.Height */;
-          }
-          if (this.editorWidth != view.scrollDOM.clientWidth) {
-              if (oracle.lineWrapping)
-                  measureContent = true;
-              this.editorWidth = view.scrollDOM.clientWidth;
-              result |= 8 /* UpdateFlag.Geometry */;
-          }
-          // Pixel viewport
-          let pixelViewport = (this.printing ? fullPixelRange : visiblePixelRange)(dom, this.paddingTop);
-          let dTop = pixelViewport.top - this.pixelViewport.top, dBottom = pixelViewport.bottom - this.pixelViewport.bottom;
-          this.pixelViewport = pixelViewport;
-          let inView = this.pixelViewport.bottom > this.pixelViewport.top && this.pixelViewport.right > this.pixelViewport.left;
-          if (inView != this.inView) {
-              this.inView = inView;
-              if (inView)
-                  measureContent = true;
-          }
-          if (!this.inView && !this.scrollTarget)
-              return 0;
-          let contentWidth = dom.clientWidth;
-          if (this.contentDOMWidth != contentWidth || this.editorHeight != view.scrollDOM.clientHeight) {
-              this.contentDOMWidth = contentWidth;
-              this.editorHeight = view.scrollDOM.clientHeight;
-              result |= 8 /* UpdateFlag.Geometry */;
-          }
-          if (measureContent) {
-              let lineHeights = view.docView.measureVisibleLineHeights(this.viewport);
-              if (oracle.mustRefreshForHeights(lineHeights))
-                  refresh = true;
-              if (refresh || oracle.lineWrapping && Math.abs(contentWidth - this.contentDOMWidth) > oracle.charWidth) {
-                  let { lineHeight, charWidth } = view.docView.measureTextSize();
-                  refresh = lineHeight > 0 && oracle.refresh(whiteSpace, lineHeight, charWidth, contentWidth / charWidth, lineHeights);
-                  if (refresh) {
-                      view.docView.minWidth = 0;
-                      result |= 8 /* UpdateFlag.Geometry */;
+      // Throw away any pending changes
+      clear() {
+          this.processRecords();
+          this.queue.length = 0;
+          this.selectionChanged = false;
+      }
+      // Chrome Android, especially in combination with GBoard, not only
+      // doesn't reliably fire regular key events, but also often
+      // surrounds the effect of enter or backspace with a bunch of
+      // composition events that, when interrupted, cause text duplication
+      // or other kinds of corruption. This hack makes the editor back off
+      // from handling DOM changes for a moment when such a key is
+      // detected (via beforeinput or keydown), and then tries to flush
+      // them or, if that has no effect, dispatches the given key.
+      delayAndroidKey(key, keyCode) {
+          var _a;
+          if (!this.delayedAndroidKey) {
+              let flush = () => {
+                  let key = this.delayedAndroidKey;
+                  if (key) {
+                      this.clearDelayedAndroidKey();
+                      this.view.inputState.lastKeyCode = key.keyCode;
+                      this.view.inputState.lastKeyTime = Date.now();
+                      let flushed = this.flush();
+                      if (!flushed && key.force)
+                          dispatchKey(this.dom, key.key, key.keyCode);
                   }
-              }
-              if (dTop > 0 && dBottom > 0)
-                  bias = Math.max(dTop, dBottom);
-              else if (dTop < 0 && dBottom < 0)
-                  bias = Math.min(dTop, dBottom);
-              oracle.heightChanged = false;
-              for (let vp of this.viewports) {
-                  let heights = vp.from == this.viewport.from ? lineHeights : view.docView.measureVisibleLineHeights(vp);
-                  this.heightMap = (refresh ? HeightMap.empty().applyChanges(this.stateDeco, Text$1.empty, this.heightOracle, [new ChangedRange(0, 0, 0, view.state.doc.length)]) : this.heightMap).updateHeight(oracle, 0, refresh, new MeasuredHeights(vp.from, heights));
-              }
-              if (oracle.heightChanged)
-                  result |= 2 /* UpdateFlag.Height */;
-          }
-          let viewportChange = !this.viewportIsAppropriate(this.viewport, bias) ||
-              this.scrollTarget && (this.scrollTarget.range.head < this.viewport.from || this.scrollTarget.range.head > this.viewport.to);
-          if (viewportChange)
-              this.viewport = this.getViewport(bias, this.scrollTarget);
-          this.updateForViewport();
-          if ((result & 2 /* UpdateFlag.Height */) || viewportChange)
-              this.updateViewportLines();
-          if (this.lineGaps.length || this.viewport.to - this.viewport.from > (2000 /* LG.Margin */ << 1))
-              this.updateLineGaps(this.ensureLineGaps(refresh ? [] : this.lineGaps, view));
-          result |= this.computeVisibleRanges();
-          if (this.mustEnforceCursorAssoc) {
-              this.mustEnforceCursorAssoc = false;
-              // This is done in the read stage, because moving the selection
-              // to a line end is going to trigger a layout anyway, so it
-              // can't be a pure write. It should be rare that it does any
-              // writing.
-              view.docView.enforceCursorAssoc();
+              };
+              this.flushingAndroidKey = this.view.win.requestAnimationFrame(flush);
           }
-          return result;
+          // Since backspace beforeinput is sometimes signalled spuriously,
+          // Enter always takes precedence.
+          if (!this.delayedAndroidKey || key == "Enter")
+              this.delayedAndroidKey = {
+                  key, keyCode,
+                  // Only run the key handler when no changes are detected if
+                  // this isn't coming right after another change, in which case
+                  // it is probably part of a weird chain of updates, and should
+                  // be ignored if it returns the DOM to its previous state.
+                  force: this.lastChange < Date.now() - 50 || !!((_a = this.delayedAndroidKey) === null || _a === void 0 ? void 0 : _a.force)
+              };
       }
-      get visibleTop() { return this.scaler.fromDOM(this.pixelViewport.top); }
-      get visibleBottom() { return this.scaler.fromDOM(this.pixelViewport.bottom); }
-      getViewport(bias, scrollTarget) {
-          // This will divide VP.Margin between the top and the
-          // bottom, depending on the bias (the change in viewport position
-          // since the last update). It'll hold a number between 0 and 1
-          let marginTop = 0.5 - Math.max(-0.5, Math.min(0.5, bias / 1000 /* VP.Margin */ / 2));
-          let map = this.heightMap, doc = this.state.doc, { visibleTop, visibleBottom } = this;
-          let viewport = new Viewport(map.lineAt(visibleTop - marginTop * 1000 /* VP.Margin */, QueryType.ByHeight, doc, 0, 0).from, map.lineAt(visibleBottom + (1 - marginTop) * 1000 /* VP.Margin */, QueryType.ByHeight, doc, 0, 0).to);
-          // If scrollTarget is given, make sure the viewport includes that position
-          if (scrollTarget) {
-              let { head } = scrollTarget.range;
-              if (head < viewport.from || head > viewport.to) {
-                  let viewHeight = Math.min(this.editorHeight, this.pixelViewport.bottom - this.pixelViewport.top);
-                  let block = map.lineAt(head, QueryType.ByPos, doc, 0, 0), topPos;
-                  if (scrollTarget.y == "center")
-                      topPos = (block.top + block.bottom) / 2 - viewHeight / 2;
-                  else if (scrollTarget.y == "start" || scrollTarget.y == "nearest" && head < viewport.from)
-                      topPos = block.top;
-                  else
-                      topPos = block.bottom - viewHeight;
-                  viewport = new Viewport(map.lineAt(topPos - 1000 /* VP.Margin */ / 2, QueryType.ByHeight, doc, 0, 0).from, map.lineAt(topPos + viewHeight + 1000 /* VP.Margin */ / 2, QueryType.ByHeight, doc, 0, 0).to);
-              }
-          }
-          return viewport;
+      clearDelayedAndroidKey() {
+          this.win.cancelAnimationFrame(this.flushingAndroidKey);
+          this.delayedAndroidKey = null;
+          this.flushingAndroidKey = -1;
       }
-      mapViewport(viewport, changes) {
-          let from = changes.mapPos(viewport.from, -1), to = changes.mapPos(viewport.to, 1);
-          return new Viewport(this.heightMap.lineAt(from, QueryType.ByPos, this.state.doc, 0, 0).from, this.heightMap.lineAt(to, QueryType.ByPos, this.state.doc, 0, 0).to);
+      flushSoon() {
+          if (this.delayedFlush < 0)
+              this.delayedFlush = this.view.win.requestAnimationFrame(() => { this.delayedFlush = -1; this.flush(); });
       }
-      // Checks if a given viewport covers the visible part of the
-      // document and not too much beyond that.
-      viewportIsAppropriate({ from, to }, bias = 0) {
-          if (!this.inView)
-              return true;
-          let { top } = this.heightMap.lineAt(from, QueryType.ByPos, this.state.doc, 0, 0);
-          let { bottom } = this.heightMap.lineAt(to, QueryType.ByPos, this.state.doc, 0, 0);
-          let { visibleTop, visibleBottom } = this;
-          return (from == 0 || top <= visibleTop - Math.max(10 /* VP.MinCoverMargin */, Math.min(-bias, 250 /* VP.MaxCoverMargin */))) &&
-              (to == this.state.doc.length ||
-                  bottom >= visibleBottom + Math.max(10 /* VP.MinCoverMargin */, Math.min(bias, 250 /* VP.MaxCoverMargin */))) &&
-              (top > visibleTop - 2 * 1000 /* VP.Margin */ && bottom < visibleBottom + 2 * 1000 /* VP.Margin */);
+      forceFlush() {
+          if (this.delayedFlush >= 0) {
+              this.view.win.cancelAnimationFrame(this.delayedFlush);
+              this.delayedFlush = -1;
+          }
+          this.flush();
       }
-      mapLineGaps(gaps, changes) {
-          if (!gaps.length || changes.empty)
-              return gaps;
-          let mapped = [];
-          for (let gap of gaps)
-              if (!changes.touchesRange(gap.from, gap.to))
-                  mapped.push(new LineGap(changes.mapPos(gap.from), changes.mapPos(gap.to), gap.size));
-          return mapped;
+      pendingRecords() {
+          for (let mut of this.observer.takeRecords())
+              this.queue.push(mut);
+          return this.queue;
       }
-      // Computes positions in the viewport where the start or end of a
-      // line should be hidden, trying to reuse existing line gaps when
-      // appropriate to avoid unneccesary redraws.
-      // Uses crude character-counting for the positioning and sizing,
-      // since actual DOM coordinates aren't always available and
-      // predictable. Relies on generous margins (see LG.Margin) to hide
-      // the artifacts this might produce from the user.
-      ensureLineGaps(current, mayMeasure) {
-          let wrapping = this.heightOracle.lineWrapping;
-          let margin = wrapping ? 10000 /* LG.MarginWrap */ : 2000 /* LG.Margin */, halfMargin = margin >> 1, doubleMargin = margin << 1;
-          // The non-wrapping logic won't work at all in predominantly right-to-left text.
-          if (this.defaultTextDirection != Direction.LTR && !wrapping)
-              return [];
-          let gaps = [];
-          let addGap = (from, to, line, structure) => {
-              if (to - from < halfMargin)
-                  return;
-              let sel = this.state.selection.main, avoid = [sel.from];
-              if (!sel.empty)
-                  avoid.push(sel.to);
-              for (let pos of avoid) {
-                  if (pos > from && pos < to) {
-                      addGap(from, pos - 10 /* LG.SelectionMargin */, line, structure);
-                      addGap(pos + 10 /* LG.SelectionMargin */, to, line, structure);
-                      return;
-                  }
-              }
-              let gap = find(current, gap => gap.from >= line.from && gap.to <= line.to &&
-                  Math.abs(gap.from - from) < halfMargin && Math.abs(gap.to - to) < halfMargin &&
-                  !avoid.some(pos => gap.from < pos && gap.to > pos));
-              if (!gap) {
-                  // When scrolling down, snap gap ends to line starts to avoid shifts in wrapping
-                  if (to < line.to && mayMeasure && wrapping &&
-                      mayMeasure.visibleRanges.some(r => r.from <= to && r.to >= to)) {
-                      let lineStart = mayMeasure.moveToLineBoundary(EditorSelection.cursor(to), false, true).head;
-                      if (lineStart > from)
-                          to = lineStart;
-                  }
-                  gap = new LineGap(from, to, this.gapSize(line, from, to, structure));
-              }
-              gaps.push(gap);
-          };
-          for (let line of this.viewportLines) {
-              if (line.length < doubleMargin)
-                  continue;
-              let structure = lineStructure(line.from, line.to, this.stateDeco);
-              if (structure.total < doubleMargin)
+      processRecords() {
+          let records = this.pendingRecords();
+          if (records.length)
+              this.queue = [];
+          let from = -1, to = -1, typeOver = false;
+          for (let record of records) {
+              let range = this.readMutation(record);
+              if (!range)
                   continue;
-              let target = this.scrollTarget ? this.scrollTarget.range.head : null;
-              let viewFrom, viewTo;
-              if (wrapping) {
-                  let marginHeight = (margin / this.heightOracle.lineLength) * this.heightOracle.lineHeight;
-                  let top, bot;
-                  if (target != null) {
-                      let targetFrac = findFraction(structure, target);
-                      let spaceFrac = ((this.visibleBottom - this.visibleTop) / 2 + marginHeight) / line.height;
-                      top = targetFrac - spaceFrac;
-                      bot = targetFrac + spaceFrac;
-                  }
-                  else {
-                      top = (this.visibleTop - line.top - marginHeight) / line.height;
-                      bot = (this.visibleBottom - line.top + marginHeight) / line.height;
-                  }
-                  viewFrom = findPosition(structure, top);
-                  viewTo = findPosition(structure, bot);
+              if (range.typeOver)
+                  typeOver = true;
+              if (from == -1) {
+                  ({ from, to } = range);
               }
               else {
-                  let totalWidth = structure.total * this.heightOracle.charWidth;
-                  let marginWidth = margin * this.heightOracle.charWidth;
-                  let left, right;
-                  if (target != null) {
-                      let targetFrac = findFraction(structure, target);
-                      let spaceFrac = ((this.pixelViewport.right - this.pixelViewport.left) / 2 + marginWidth) / totalWidth;
-                      left = targetFrac - spaceFrac;
-                      right = targetFrac + spaceFrac;
-                  }
-                  else {
-                      left = (this.pixelViewport.left - marginWidth) / totalWidth;
-                      right = (this.pixelViewport.right + marginWidth) / totalWidth;
-                  }
-                  viewFrom = findPosition(structure, left);
-                  viewTo = findPosition(structure, right);
+                  from = Math.min(range.from, from);
+                  to = Math.max(range.to, to);
               }
-              if (viewFrom > line.from)
-                  addGap(line.from, viewFrom, line, structure);
-              if (viewTo < line.to)
-                  addGap(viewTo, line.to, line, structure);
           }
-          return gaps;
+          return { from, to, typeOver };
       }
-      gapSize(line, from, to, structure) {
-          let fraction = findFraction(structure, to) - findFraction(structure, from);
-          if (this.heightOracle.lineWrapping) {
-              return line.height * fraction;
+      readChange() {
+          let { from, to, typeOver } = this.processRecords();
+          let newSel = this.selectionChanged && hasSelection(this.dom, this.selectionRange);
+          if (from < 0 && !newSel)
+              return null;
+          if (from > -1)
+              this.lastChange = Date.now();
+          this.view.inputState.lastFocusTime = 0;
+          this.selectionChanged = false;
+          return new DOMChange(this.view, from, to, typeOver);
+      }
+      // Apply pending changes, if any
+      flush(readSelection = true) {
+          // Completely hold off flushing when pending keys are set—the code
+          // managing those will make sure processRecords is called and the
+          // view is resynchronized after
+          if (this.delayedFlush >= 0 || this.delayedAndroidKey)
+              return false;
+          if (readSelection)
+              this.readSelectionRange();
+          let domChange = this.readChange();
+          if (!domChange)
+              return false;
+          let startState = this.view.state;
+          let handled = applyDOMChange(this.view, domChange);
+          // The view wasn't updated
+          if (this.view.state == startState)
+              this.view.update([]);
+          return handled;
+      }
+      readMutation(rec) {
+          let cView = this.view.docView.nearest(rec.target);
+          if (!cView || cView.ignoreMutation(rec))
+              return null;
+          cView.markDirty(rec.type == "attributes");
+          if (rec.type == "attributes")
+              cView.dirty |= 4 /* Attrs */;
+          if (rec.type == "childList") {
+              let childBefore = findChild(cView, rec.previousSibling || rec.target.previousSibling, -1);
+              let childAfter = findChild(cView, rec.nextSibling || rec.target.nextSibling, 1);
+              return { from: childBefore ? cView.posAfter(childBefore) : cView.posAtStart,
+                  to: childAfter ? cView.posBefore(childAfter) : cView.posAtEnd, typeOver: false };
+          }
+          else if (rec.type == "characterData") {
+              return { from: cView.posAtStart, to: cView.posAtEnd, typeOver: rec.target.nodeValue == rec.oldValue };
           }
           else {
-              return structure.total * this.heightOracle.charWidth * fraction;
+              return null;
           }
       }
-      updateLineGaps(gaps) {
-          if (!LineGap.same(gaps, this.lineGaps)) {
-              this.lineGaps = gaps;
-              this.lineGapDeco = Decoration.set(gaps.map(gap => gap.draw(this.heightOracle.lineWrapping)));
+      setWindow(win) {
+          if (win != this.win) {
+              this.removeWindowListeners(this.win);
+              this.win = win;
+              this.addWindowListeners(this.win);
           }
       }
-      computeVisibleRanges() {
-          let deco = this.stateDeco;
-          if (this.lineGaps.length)
-              deco = deco.concat(this.lineGapDeco);
-          let ranges = [];
-          RangeSet.spans(deco, this.viewport.from, this.viewport.to, {
-              span(from, to) { ranges.push({ from, to }); },
-              point() { }
-          }, 20);
-          let changed = ranges.length != this.visibleRanges.length ||
-              this.visibleRanges.some((r, i) => r.from != ranges[i].from || r.to != ranges[i].to);
-          this.visibleRanges = ranges;
-          return changed ? 4 /* UpdateFlag.Viewport */ : 0;
-      }
-      lineBlockAt(pos) {
-          return (pos >= this.viewport.from && pos <= this.viewport.to && this.viewportLines.find(b => b.from <= pos && b.to >= pos)) ||
-              scaleBlock(this.heightMap.lineAt(pos, QueryType.ByPos, this.state.doc, 0, 0), this.scaler);
-      }
-      lineBlockAtHeight(height) {
-          return scaleBlock(this.heightMap.lineAt(this.scaler.fromDOM(height), QueryType.ByHeight, this.state.doc, 0, 0), this.scaler);
-      }
-      elementAtHeight(height) {
-          return scaleBlock(this.heightMap.blockAt(this.scaler.fromDOM(height), this.state.doc, 0, 0), this.scaler);
-      }
-      get docHeight() {
-          return this.scaler.toDOM(this.heightMap.height);
-      }
-      get contentHeight() {
-          return this.docHeight + this.paddingTop + this.paddingBottom;
+      addWindowListeners(win) {
+          win.addEventListener("resize", this.onResize);
+          win.addEventListener("beforeprint", this.onPrint);
+          win.addEventListener("scroll", this.onScroll);
+          win.document.addEventListener("selectionchange", this.onSelectionChange);
       }
-  }
-  class Viewport {
-      constructor(from, to) {
-          this.from = from;
-          this.to = to;
+      removeWindowListeners(win) {
+          win.removeEventListener("scroll", this.onScroll);
+          win.removeEventListener("resize", this.onResize);
+          win.removeEventListener("beforeprint", this.onPrint);
+          win.document.removeEventListener("selectionchange", this.onSelectionChange);
       }
-  }
-  function lineStructure(from, to, stateDeco) {
-      let ranges = [], pos = from, total = 0;
-      RangeSet.spans(stateDeco, from, to, {
-          span() { },
-          point(from, to) {
-              if (from > pos) {
-                  ranges.push({ from: pos, to: from });
-                  total += from - pos;
-              }
-              pos = to;
-          }
-      }, 20); // We're only interested in collapsed ranges of a significant size
-      if (pos < to) {
-          ranges.push({ from: pos, to });
-          total += to - pos;
+      destroy() {
+          var _a, _b, _c, _d;
+          this.stop();
+          (_a = this.intersection) === null || _a === void 0 ? void 0 : _a.disconnect();
+          (_b = this.gapIntersection) === null || _b === void 0 ? void 0 : _b.disconnect();
+          (_c = this.resizeScroll) === null || _c === void 0 ? void 0 : _c.disconnect();
+          (_d = this.resizeContent) === null || _d === void 0 ? void 0 : _d.disconnect();
+          for (let dom of this.scrollTargets)
+              dom.removeEventListener("scroll", this.onScroll);
+          this.removeWindowListeners(this.win);
+          clearTimeout(this.parentCheck);
+          clearTimeout(this.resizeTimeout);
+          this.win.cancelAnimationFrame(this.delayedFlush);
+          this.win.cancelAnimationFrame(this.flushingAndroidKey);
       }
-      return { total, ranges };
   }
-  function findPosition({ total, ranges }, ratio) {
-      if (ratio <= 0)
-          return ranges[0].from;
-      if (ratio >= 1)
-          return ranges[ranges.length - 1].to;
-      let dist = Math.floor(total * ratio);
-      for (let i = 0;; i++) {
-          let { from, to } = ranges[i], size = to - from;
-          if (dist <= size)
-              return from + dist;
-          dist -= size;
+  function findChild(cView, dom, dir) {
+      while (dom) {
+          let curView = ContentView.get(dom);
+          if (curView && curView.parent == cView)
+              return curView;
+          let parent = dom.parentNode;
+          dom = parent != cView.dom ? parent : dir > 0 ? dom.nextSibling : dom.previousSibling;
       }
+      return null;
   }
-  function findFraction(structure, pos) {
-      let counted = 0;
-      for (let { from, to } of structure.ranges) {
-          if (pos <= to) {
-              counted += pos - from;
-              break;
-          }
-          counted += to - from;
+  // Used to work around a Safari Selection/shadow DOM bug (#414)
+  function safariSelectionRangeHack(view) {
+      let found = null;
+      // Because Safari (at least in 2018-2021) doesn't provide regular
+      // access to the selection inside a shadowroot, we have to perform a
+      // ridiculous hack to get at it—using `execCommand` to trigger a
+      // `beforeInput` event so that we can read the target range from the
+      // event.
+      function read(event) {
+          event.preventDefault();
+          event.stopImmediatePropagation();
+          found = event.getTargetRanges()[0];
       }
-      return counted / structure.total;
-  }
-  function find(array, f) {
-      for (let val of array)
-          if (f(val))
-              return val;
-      return undefined;
+      view.contentDOM.addEventListener("beforeinput", read, true);
+      view.dom.ownerDocument.execCommand("indent");
+      view.contentDOM.removeEventListener("beforeinput", read, true);
+      if (!found)
+          return null;
+      let anchorNode = found.startContainer, anchorOffset = found.startOffset;
+      let focusNode = found.endContainer, focusOffset = found.endOffset;
+      let curAnchor = view.docView.domAtPos(view.state.selection.main.anchor);
+      // Since such a range doesn't distinguish between anchor and head,
+      // use a heuristic that flips it around if its end matches the
+      // current anchor.
+      if (isEquivalentPosition(curAnchor.node, curAnchor.offset, focusNode, focusOffset))
+          [anchorNode, anchorOffset, focusNode, focusOffset] = [focusNode, focusOffset, anchorNode, anchorOffset];
+      return { anchorNode, anchorOffset, focusNode, focusOffset };
   }
-  // Don't scale when the document height is within the range of what
-  // the DOM can handle.
-  const IdScaler = {
-      toDOM(n) { return n; },
-      fromDOM(n) { return n; },
-      scale: 1
-  };
-  // When the height is too big (> VP.MaxDOMHeight), scale down the
-  // regions outside the viewports so that the total height is
-  // VP.MaxDOMHeight.
-  class BigScaler {
-      constructor(doc, heightMap, viewports) {
-          let vpHeight = 0, base = 0, domBase = 0;
-          this.viewports = viewports.map(({ from, to }) => {
-              let top = heightMap.lineAt(from, QueryType.ByPos, doc, 0, 0).top;
-              let bottom = heightMap.lineAt(to, QueryType.ByPos, doc, 0, 0).bottom;
-              vpHeight += bottom - top;
-              return { from, to, top, bottom, domTop: 0, domBottom: 0 };
-          });
-          this.scale = (7000000 /* VP.MaxDOMHeight */ - vpHeight) / (heightMap.height - vpHeight);
-          for (let obj of this.viewports) {
-              obj.domTop = domBase + (obj.top - base) * this.scale;
-              domBase = obj.domBottom = obj.domTop + (obj.bottom - obj.top);
-              base = obj.bottom;
-          }
-      }
-      toDOM(n) {
-          for (let i = 0, base = 0, domBase = 0;; i++) {
-              let vp = i < this.viewports.length ? this.viewports[i] : null;
-              if (!vp || n < vp.top)
-                  return domBase + (n - base) * this.scale;
-              if (n <= vp.bottom)
-                  return vp.domTop + (n - vp.top);
-              base = vp.bottom;
-              domBase = vp.domBottom;
-          }
+
+  // The editor's update state machine looks something like this:
+  //
+  //     Idle → Updating ⇆ Idle (unchecked) → Measuring → Idle
+  //                                         ↑      ↓
+  //                                         Updating (measure)
+  //
+  // The difference between 'Idle' and 'Idle (unchecked)' lies in
+  // whether a layout check has been scheduled. A regular update through
+  // the `update` method updates the DOM in a write-only fashion, and
+  // relies on a check (scheduled with `requestAnimationFrame`) to make
+  // sure everything is where it should be and the viewport covers the
+  // visible code. That check continues to measure and then optionally
+  // update until it reaches a coherent state.
+  /**
+  An editor view represents the editor's user interface. It holds
+  the editable DOM surface, and possibly other elements such as the
+  line number gutter. It handles events and dispatches state
+  transactions for editing actions.
+  */
+  class EditorView {
+      /**
+      Construct a new view. You'll want to either provide a `parent`
+      option, or put `view.dom` into your document after creating a
+      view, so that the user can see the editor.
+      */
+      constructor(config = {}) {
+          this.plugins = [];
+          this.pluginMap = new Map;
+          this.editorAttrs = {};
+          this.contentAttrs = {};
+          this.bidiCache = [];
+          this.destroyed = false;
+          /**
+          @internal
+          */
+          this.updateState = 2 /* Updating */;
+          /**
+          @internal
+          */
+          this.measureScheduled = -1;
+          /**
+          @internal
+          */
+          this.measureRequests = [];
+          this.contentDOM = document.createElement("div");
+          this.scrollDOM = document.createElement("div");
+          this.scrollDOM.tabIndex = -1;
+          this.scrollDOM.className = "cm-scroller";
+          this.scrollDOM.appendChild(this.contentDOM);
+          this.announceDOM = document.createElement("div");
+          this.announceDOM.style.cssText = "position: fixed; top: -10000px";
+          this.announceDOM.setAttribute("aria-live", "polite");
+          this.dom = document.createElement("div");
+          this.dom.appendChild(this.announceDOM);
+          this.dom.appendChild(this.scrollDOM);
+          this._dispatch = config.dispatch || ((tr) => this.update([tr]));
+          this.dispatch = this.dispatch.bind(this);
+          this._root = (config.root || getRoot(config.parent) || document);
+          this.viewState = new ViewState(config.state || EditorState.create(config));
+          this.plugins = this.state.facet(viewPlugin).map(spec => new PluginInstance(spec));
+          for (let plugin of this.plugins)
+              plugin.update(this);
+          this.observer = new DOMObserver(this);
+          this.inputState = new InputState(this);
+          this.inputState.ensureHandlers(this, this.plugins);
+          this.docView = new DocView(this);
+          this.mountStyles();
+          this.updateAttrs();
+          this.updateState = 0 /* Idle */;
+          this.requestMeasure();
+          if (config.parent)
+              config.parent.appendChild(this.dom);
       }
-      fromDOM(n) {
-          for (let i = 0, base = 0, domBase = 0;; i++) {
-              let vp = i < this.viewports.length ? this.viewports[i] : null;
-              if (!vp || n < vp.domTop)
-                  return base + (n - domBase) / this.scale;
-              if (n <= vp.domBottom)
-                  return vp.top + (n - vp.domTop);
-              base = vp.bottom;
-              domBase = vp.domBottom;
-          }
+      /**
+      The current editor state.
+      */
+      get state() { return this.viewState.state; }
+      /**
+      To be able to display large documents without consuming too much
+      memory or overloading the browser, CodeMirror only draws the
+      code that is visible (plus a margin around it) to the DOM. This
+      property tells you the extent of the current drawn viewport, in
+      document positions.
+      */
+      get viewport() { return this.viewState.viewport; }
+      /**
+      When there are, for example, large collapsed ranges in the
+      viewport, its size can be a lot bigger than the actual visible
+      content. Thus, if you are doing something like styling the
+      content in the viewport, it is preferable to only do so for
+      these ranges, which are the subset of the viewport that is
+      actually drawn.
+      */
+      get visibleRanges() { return this.viewState.visibleRanges; }
+      /**
+      Returns false when the editor is entirely scrolled out of view
+      or otherwise hidden.
+      */
+      get inView() { return this.viewState.inView; }
+      /**
+      Indicates whether the user is currently composing text via
+      [IME](https://en.wikipedia.org/wiki/Input_method), and at least
+      one change has been made in the current composition.
+      */
+      get composing() { return this.inputState.composing > 0; }
+      /**
+      Indicates whether the user is currently in composing state. Note
+      that on some platforms, like Android, this will be the case a
+      lot, since just putting the cursor on a word starts a
+      composition there.
+      */
+      get compositionStarted() { return this.inputState.composing >= 0; }
+      /**
+      The document or shadow root that the view lives in.
+      */
+      get root() { return this._root; }
+      /**
+      @internal
+      */
+      get win() { return this.dom.ownerDocument.defaultView || window; }
+      dispatch(...input) {
+          let tr = input.length == 1 && input[0] instanceof Transaction ? input[0]
+              : this.state.update(...input);
+          this._dispatch(tr, this);
       }
-  }
-  function scaleBlock(block, scaler) {
-      if (scaler.scale == 1)
-          return block;
-      let bTop = scaler.toDOM(block.top), bBottom = scaler.toDOM(block.bottom);
-      return new BlockInfo(block.from, block.length, bTop, bBottom - bTop, Array.isArray(block.type) ? block.type.map(b => scaleBlock(b, scaler)) : block.type);
-  }
-
-  const theme = /*@__PURE__*/Facet.define({ combine: strs => strs.join(" ") });
-  const darkTheme = /*@__PURE__*/Facet.define({ combine: values => values.indexOf(true) > -1 });
-  const baseThemeID = /*@__PURE__*/StyleModule.newName(), baseLightID = /*@__PURE__*/StyleModule.newName(), baseDarkID = /*@__PURE__*/StyleModule.newName();
-  const lightDarkIDs = { "&light": "." + baseLightID, "&dark": "." + baseDarkID };
-  function buildTheme(main, spec, scopes) {
-      return new StyleModule(spec, {
-          finish(sel) {
-              return /&/.test(sel) ? sel.replace(/&\w*/, m => {
-                  if (m == "&")
-                      return main;
-                  if (!scopes || !scopes[m])
-                      throw new RangeError(`Unsupported selector: ${m}`);
-                  return scopes[m];
-              }) : main + " " + sel;
-          }
-      });
-  }
-  const baseTheme$1 = /*@__PURE__*/buildTheme("." + baseThemeID, {
-      "&.cm-editor": {
-          position: "relative !important",
-          boxSizing: "border-box",
-          "&.cm-focused": {
-              // Provide a simple default outline to make sure a focused
-              // editor is visually distinct. Can't leave the default behavior
-              // because that will apply to the content element, which is
-              // inside the scrollable container and doesn't include the
-              // gutters. We also can't use an 'auto' outline, since those
-              // are, for some reason, drawn behind the element content, which
-              // will cause things like the active line background to cover
-              // the outline (#297).
-              outline: "1px dotted #212121"
-          },
-          display: "flex !important",
-          flexDirection: "column"
-      },
-      ".cm-scroller": {
-          display: "flex !important",
-          alignItems: "flex-start !important",
-          fontFamily: "monospace",
-          lineHeight: 1.4,
-          height: "100%",
-          overflowX: "auto",
-          position: "relative",
-          zIndex: 0
-      },
-      ".cm-content": {
-          margin: 0,
-          flexGrow: 2,
-          flexShrink: 0,
-          display: "block",
-          whiteSpace: "pre",
-          wordWrap: "normal",
-          boxSizing: "border-box",
-          padding: "4px 0",
-          outline: "none",
-          "&[contenteditable=true]": {
-              WebkitUserModify: "read-write-plaintext-only",
-          }
-      },
-      ".cm-lineWrapping": {
-          whiteSpace_fallback: "pre-wrap",
-          whiteSpace: "break-spaces",
-          wordBreak: "break-word",
-          overflowWrap: "anywhere",
-          flexShrink: 1
-      },
-      "&light .cm-content": { caretColor: "black" },
-      "&dark .cm-content": { caretColor: "white" },
-      ".cm-line": {
-          display: "block",
-          padding: "0 2px 0 6px"
-      },
-      ".cm-layer": {
-          contain: "size style",
-          "& > *": {
-              position: "absolute"
+      /**
+      Update the view for the given array of transactions. This will
+      update the visible document and selection to match the state
+      produced by the transactions, and notify view plugins of the
+      change. You should usually call
+      [`dispatch`](https://codemirror.net/6/docs/ref/#view.EditorView.dispatch) instead, which uses this
+      as a primitive.
+      */
+      update(transactions) {
+          if (this.updateState != 0 /* Idle */)
+              throw new Error("Calls to EditorView.update are not allowed while an update is in progress");
+          let redrawn = false, attrsChanged = false, update;
+          let state = this.state;
+          for (let tr of transactions) {
+              if (tr.startState != state)
+                  throw new RangeError("Trying to update state with a transaction that doesn't start from the previous state.");
+              state = tr.state;
           }
-      },
-      "&light .cm-selectionBackground": {
-          background: "#d9d9d9"
-      },
-      "&dark .cm-selectionBackground": {
-          background: "#222"
-      },
-      "&light.cm-focused .cm-selectionBackground": {
-          background: "#d7d4f0"
-      },
-      "&dark.cm-focused .cm-selectionBackground": {
-          background: "#233"
-      },
-      ".cm-cursorLayer": {
-          pointerEvents: "none"
-      },
-      "&.cm-focused .cm-cursorLayer": {
-          animation: "steps(1) cm-blink 1.2s infinite"
-      },
-      // Two animations defined so that we can switch between them to
-      // restart the animation without forcing another style
-      // recomputation.
-      "@keyframes cm-blink": { "0%": {}, "50%": { opacity: 0 }, "100%": {} },
-      "@keyframes cm-blink2": { "0%": {}, "50%": { opacity: 0 }, "100%": {} },
-      ".cm-cursor, .cm-dropCursor": {
-          borderLeft: "1.2px solid black",
-          marginLeft: "-0.6px",
-          pointerEvents: "none",
-      },
-      ".cm-cursor": {
-          display: "none"
-      },
-      "&dark .cm-cursor": {
-          borderLeftColor: "#444"
-      },
-      "&.cm-focused .cm-cursor": {
-          display: "block"
-      },
-      "&light .cm-activeLine": { backgroundColor: "#cceeff44" },
-      "&dark .cm-activeLine": { backgroundColor: "#99eeff33" },
-      "&light .cm-specialChar": { color: "red" },
-      "&dark .cm-specialChar": { color: "#f78" },
-      ".cm-gutters": {
-          flexShrink: 0,
-          display: "flex",
-          height: "100%",
-          boxSizing: "border-box",
-          left: 0,
-          zIndex: 200
-      },
-      "&light .cm-gutters": {
-          backgroundColor: "#f5f5f5",
-          color: "#6c6c6c",
-          borderRight: "1px solid #ddd"
-      },
-      "&dark .cm-gutters": {
-          backgroundColor: "#333338",
-          color: "#ccc"
-      },
-      ".cm-gutter": {
-          display: "flex !important",
-          flexDirection: "column",
-          flexShrink: 0,
-          boxSizing: "border-box",
-          minHeight: "100%",
-          overflow: "hidden"
-      },
-      ".cm-gutterElement": {
-          boxSizing: "border-box"
-      },
-      ".cm-lineNumbers .cm-gutterElement": {
-          padding: "0 3px 0 5px",
-          minWidth: "20px",
-          textAlign: "right",
-          whiteSpace: "nowrap"
-      },
-      "&light .cm-activeLineGutter": {
-          backgroundColor: "#e2f2ff"
-      },
-      "&dark .cm-activeLineGutter": {
-          backgroundColor: "#222227"
-      },
-      ".cm-panels": {
-          boxSizing: "border-box",
-          position: "sticky",
-          left: 0,
-          right: 0
-      },
-      "&light .cm-panels": {
-          backgroundColor: "#f5f5f5",
-          color: "black"
-      },
-      "&light .cm-panels-top": {
-          borderBottom: "1px solid #ddd"
-      },
-      "&light .cm-panels-bottom": {
-          borderTop: "1px solid #ddd"
-      },
-      "&dark .cm-panels": {
-          backgroundColor: "#333338",
-          color: "white"
-      },
-      ".cm-tab": {
-          display: "inline-block",
-          overflow: "hidden",
-          verticalAlign: "bottom"
-      },
-      ".cm-widgetBuffer": {
-          verticalAlign: "text-top",
-          height: "1em",
-          width: 0,
-          display: "inline"
-      },
-      ".cm-placeholder": {
-          color: "#888",
-          display: "inline-block",
-          verticalAlign: "top",
-      },
-      ".cm-highlightSpace:before": {
-          content: "attr(data-display)",
-          position: "absolute",
-          pointerEvents: "none",
-          color: "#888"
-      },
-      ".cm-highlightTab": {
-          backgroundImage: `url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="200" height="20"><path stroke="%23888" stroke-width="1" fill="none" d="M1 10H196L190 5M190 15L196 10M197 4L197 16"/></svg>')`,
-          backgroundSize: "auto 100%",
-          backgroundPosition: "right 90%",
-          backgroundRepeat: "no-repeat"
-      },
-      ".cm-trailingSpace": {
-          backgroundColor: "#ff332255"
-      },
-      ".cm-button": {
-          verticalAlign: "middle",
-          color: "inherit",
-          fontSize: "70%",
-          padding: ".2em 1em",
-          borderRadius: "1px"
-      },
-      "&light .cm-button": {
-          backgroundImage: "linear-gradient(#eff1f5, #d9d9df)",
-          border: "1px solid #888",
-          "&:active": {
-              backgroundImage: "linear-gradient(#b4b4b4, #d0d3d6)"
+          if (this.destroyed) {
+              this.viewState.state = state;
+              return;
           }
-      },
-      "&dark .cm-button": {
-          backgroundImage: "linear-gradient(#393939, #111)",
-          border: "1px solid #888",
-          "&:active": {
-              backgroundImage: "linear-gradient(#111, #333)"
+          let focus = this.hasFocus, focusFlag = 0, dispatchFocus = null;
+          if (transactions.some(tr => tr.annotation(isFocusChange))) {
+              this.inputState.notifiedFocused = focus;
+              // If a focus-change transaction is being dispatched, set this update flag.
+              focusFlag = 1 /* Focus */;
           }
-      },
-      ".cm-textfield": {
-          verticalAlign: "middle",
-          color: "inherit",
-          fontSize: "70%",
-          border: "1px solid silver",
-          padding: ".2em .5em"
-      },
-      "&light .cm-textfield": {
-          backgroundColor: "white"
-      },
-      "&dark .cm-textfield": {
-          border: "1px solid #555",
-          backgroundColor: "inherit"
-      }
-  }, lightDarkIDs);
-
-  class DOMChange {
-      constructor(view, start, end, typeOver) {
-          this.typeOver = typeOver;
-          this.bounds = null;
-          this.text = "";
-          let { impreciseHead: iHead, impreciseAnchor: iAnchor } = view.docView;
-          if (view.state.readOnly && start > -1) {
-              // Ignore changes when the editor is read-only
-              this.newSel = null;
+          else if (focus != this.inputState.notifiedFocused) {
+              this.inputState.notifiedFocused = focus;
+              // Schedule a separate focus transaction if necessary, otherwise
+              // add a flag to this update
+              dispatchFocus = focusChangeTransaction(state, focus);
+              if (!dispatchFocus)
+                  focusFlag = 1 /* Focus */;
           }
-          else if (start > -1 && (this.bounds = view.docView.domBoundsAround(start, end, 0))) {
-              let selPoints = iHead || iAnchor ? [] : selectionPoints(view);
-              let reader = new DOMReader(selPoints, view.state);
-              reader.readRange(this.bounds.startDOM, this.bounds.endDOM);
-              this.text = reader.text;
-              this.newSel = selectionFromPoints(selPoints, this.bounds.from);
+          // If there was a pending DOM change, eagerly read it and try to
+          // apply it after the given transactions.
+          let pendingKey = this.observer.delayedAndroidKey, domChange = null;
+          if (pendingKey) {
+              this.observer.clearDelayedAndroidKey();
+              domChange = this.observer.readChange();
+              // Only try to apply DOM changes if the transactions didn't
+              // change the doc or selection.
+              if (domChange && !this.state.doc.eq(state.doc) || !this.state.selection.eq(state.selection))
+                  domChange = null;
           }
           else {
-              let domSel = view.observer.selectionRange;
-              let head = iHead && iHead.node == domSel.focusNode && iHead.offset == domSel.focusOffset ||
-                  !contains(view.contentDOM, domSel.focusNode)
-                  ? view.state.selection.main.head
-                  : view.docView.posFromDOM(domSel.focusNode, domSel.focusOffset);
-              let anchor = iAnchor && iAnchor.node == domSel.anchorNode && iAnchor.offset == domSel.anchorOffset ||
-                  !contains(view.contentDOM, domSel.anchorNode)
-                  ? view.state.selection.main.anchor
-                  : view.docView.posFromDOM(domSel.anchorNode, domSel.anchorOffset);
-              this.newSel = EditorSelection.single(anchor, head);
+              this.observer.clear();
           }
-      }
-  }
-  function applyDOMChange(view, domChange) {
-      let change;
-      let { newSel } = domChange, sel = view.state.selection.main;
-      if (domChange.bounds) {
-          let { from, to } = domChange.bounds;
-          let preferredPos = sel.from, preferredSide = null;
-          // Prefer anchoring to end when Backspace is pressed (or, on
-          // Android, when something was deleted)
-          if (view.inputState.lastKeyCode === 8 && view.inputState.lastKeyTime > Date.now() - 100 ||
-              browser.android && domChange.text.length < to - from) {
-              preferredPos = sel.to;
-              preferredSide = "end";
+          // When the phrases change, redraw the editor
+          if (state.facet(EditorState.phrases) != this.state.facet(EditorState.phrases))
+              return this.setState(state);
+          update = ViewUpdate.create(this, state, transactions);
+          update.flags |= focusFlag;
+          let scrollTarget = this.viewState.scrollTarget;
+          try {
+              this.updateState = 2 /* Updating */;
+              for (let tr of transactions) {
+                  if (scrollTarget)
+                      scrollTarget = scrollTarget.map(tr.changes);
+                  if (tr.scrollIntoView) {
+                      let { main } = tr.state.selection;
+                      scrollTarget = new ScrollTarget(main.empty ? main : EditorSelection.cursor(main.head, main.head > main.anchor ? -1 : 1));
+                  }
+                  for (let e of tr.effects)
+                      if (e.is(scrollIntoView))
+                          scrollTarget = e.value;
+              }
+              this.viewState.update(update, scrollTarget);
+              this.bidiCache = CachedOrder.update(this.bidiCache, update.changes);
+              if (!update.empty) {
+                  this.updatePlugins(update);
+                  this.inputState.update(update);
+              }
+              redrawn = this.docView.update(update);
+              if (this.state.facet(styleModule) != this.styleModules)
+                  this.mountStyles();
+              attrsChanged = this.updateAttrs();
+              this.showAnnouncements(transactions);
+              this.docView.updateSelection(redrawn, transactions.some(tr => tr.isUserEvent("select.pointer")));
           }
-          let diff = findDiff(view.state.doc.sliceString(from, to, LineBreakPlaceholder), domChange.text, preferredPos - from, preferredSide);
-          if (diff) {
-              // Chrome inserts two newlines when pressing shift-enter at the
-              // end of a line. DomChange drops one of those.
-              if (browser.chrome && view.inputState.lastKeyCode == 13 &&
-                  diff.toB == diff.from + 2 && domChange.text.slice(diff.from, diff.toB) == LineBreakPlaceholder + LineBreakPlaceholder)
-                  diff.toB--;
-              change = { from: from + diff.from, to: from + diff.toA,
-                  insert: Text$1.of(domChange.text.slice(diff.from, diff.toB).split(LineBreakPlaceholder)) };
+          finally {
+              this.updateState = 0 /* Idle */;
           }
+          if (update.startState.facet(theme) != update.state.facet(theme))
+              this.viewState.mustMeasureContent = true;
+          if (redrawn || attrsChanged || scrollTarget || this.viewState.mustEnforceCursorAssoc || this.viewState.mustMeasureContent)
+              this.requestMeasure();
+          if (!update.empty)
+              for (let listener of this.state.facet(updateListener))
+                  listener(update);
+          if (dispatchFocus || domChange)
+              Promise.resolve().then(() => {
+                  if (dispatchFocus && this.state == dispatchFocus.startState)
+                      this.dispatch(dispatchFocus);
+                  if (domChange) {
+                      if (!applyDOMChange(this, domChange) && pendingKey.force)
+                          dispatchKey(this.contentDOM, pendingKey.key, pendingKey.keyCode);
+                  }
+              });
       }
-      else if (newSel && (!view.hasFocus || !view.state.facet(editable) || newSel.main.eq(sel))) {
-          newSel = null;
-      }
-      if (!change && !newSel)
-          return false;
-      if (!change && domChange.typeOver && !sel.empty && newSel && newSel.main.empty) {
-          // Heuristic to notice typing over a selected character
-          change = { from: sel.from, to: sel.to, insert: view.state.doc.slice(sel.from, sel.to) };
-      }
-      else if (change && change.from >= sel.from && change.to <= sel.to &&
-          (change.from != sel.from || change.to != sel.to) &&
-          (sel.to - sel.from) - (change.to - change.from) <= 4) {
-          // If the change is inside the selection and covers most of it,
-          // assume it is a selection replace (with identical characters at
-          // the start/end not included in the diff)
-          change = {
-              from: sel.from, to: sel.to,
-              insert: view.state.doc.slice(sel.from, change.from).append(change.insert).append(view.state.doc.slice(change.to, sel.to))
-          };
-      }
-      else if ((browser.mac || browser.android) && change && change.from == change.to && change.from == sel.head - 1 &&
-          /^\. ?$/.test(change.insert.toString())) {
-          // Detect insert-period-on-double-space Mac and Android behavior,
-          // and transform it into a regular space insert.
-          if (newSel && change.insert.length == 2)
-              newSel = EditorSelection.single(newSel.main.anchor - 1, newSel.main.head - 1);
-          change = { from: sel.from, to: sel.to, insert: Text$1.of([" "]) };
-      }
-      else if (browser.chrome && change && change.from == change.to && change.from == sel.head &&
-          change.insert.toString() == "\n " && view.lineWrapping) {
-          // In Chrome, if you insert a space at the start of a wrapped
-          // line, it will actually insert a newline and a space, causing a
-          // bogus new line to be created in CodeMirror (#968)
-          if (newSel)
-              newSel = EditorSelection.single(newSel.main.anchor - 1, newSel.main.head - 1);
-          change = { from: sel.from, to: sel.to, insert: Text$1.of([" "]) };
+      /**
+      Reset the view to the given state. (This will cause the entire
+      document to be redrawn and all view plugins to be reinitialized,
+      so you should probably only use it when the new state isn't
+      derived from the old state. Otherwise, use
+      [`dispatch`](https://codemirror.net/6/docs/ref/#view.EditorView.dispatch) instead.)
+      */
+      setState(newState) {
+          if (this.updateState != 0 /* Idle */)
+              throw new Error("Calls to EditorView.setState are not allowed while an update is in progress");
+          if (this.destroyed) {
+              this.viewState.state = newState;
+              return;
+          }
+          this.updateState = 2 /* Updating */;
+          let hadFocus = this.hasFocus;
+          try {
+              for (let plugin of this.plugins)
+                  plugin.destroy(this);
+              this.viewState = new ViewState(newState);
+              this.plugins = newState.facet(viewPlugin).map(spec => new PluginInstance(spec));
+              this.pluginMap.clear();
+              for (let plugin of this.plugins)
+                  plugin.update(this);
+              this.docView = new DocView(this);
+              this.inputState.ensureHandlers(this, this.plugins);
+              this.mountStyles();
+              this.updateAttrs();
+              this.bidiCache = [];
+          }
+          finally {
+              this.updateState = 0 /* Idle */;
+          }
+          if (hadFocus)
+              this.focus();
+          this.requestMeasure();
       }
-      if (change) {
-          let startState = view.state;
-          if (browser.ios && view.inputState.flushIOSKey(view))
-              return true;
-          // Android browsers don't fire reasonable key events for enter,
-          // backspace, or delete. So this detects changes that look like
-          // they're caused by those keys, and reinterprets them as key
-          // events. (Some of these keys are also handled by beforeinput
-          // events and the pendingAndroidKey mechanism, but that's not
-          // reliable in all situations.)
-          if (browser.android &&
-              ((change.from == sel.from && change.to == sel.to &&
-                  change.insert.length == 1 && change.insert.lines == 2 &&
-                  dispatchKey(view.contentDOM, "Enter", 13)) ||
-                  (change.from == sel.from - 1 && change.to == sel.to && change.insert.length == 0 &&
-                      dispatchKey(view.contentDOM, "Backspace", 8)) ||
-                  (change.from == sel.from && change.to == sel.to + 1 && change.insert.length == 0 &&
-                      dispatchKey(view.contentDOM, "Delete", 46))))
-              return true;
-          let text = change.insert.toString();
-          if (view.state.facet(inputHandler).some(h => h(view, change.from, change.to, text)))
-              return true;
-          if (view.inputState.composing >= 0)
-              view.inputState.composing++;
-          let tr;
-          if (change.from >= sel.from && change.to <= sel.to && change.to - change.from >= (sel.to - sel.from) / 3 &&
-              (!newSel || newSel.main.empty && newSel.main.from == change.from + change.insert.length) &&
-              view.inputState.composing < 0) {
-              let before = sel.from < change.from ? startState.sliceDoc(sel.from, change.from) : "";
-              let after = sel.to > change.to ? startState.sliceDoc(change.to, sel.to) : "";
-              tr = startState.replaceSelection(view.state.toText(before + change.insert.sliceString(0, undefined, view.state.lineBreak) + after));
+      updatePlugins(update) {
+          let prevSpecs = update.startState.facet(viewPlugin), specs = update.state.facet(viewPlugin);
+          if (prevSpecs != specs) {
+              let newPlugins = [];
+              for (let spec of specs) {
+                  let found = prevSpecs.indexOf(spec);
+                  if (found < 0) {
+                      newPlugins.push(new PluginInstance(spec));
+                  }
+                  else {
+                      let plugin = this.plugins[found];
+                      plugin.mustUpdate = update;
+                      newPlugins.push(plugin);
+                  }
+              }
+              for (let plugin of this.plugins)
+                  if (plugin.mustUpdate != update)
+                      plugin.destroy(this);
+              this.plugins = newPlugins;
+              this.pluginMap.clear();
+              this.inputState.ensureHandlers(this, this.plugins);
           }
           else {
-              let changes = startState.changes(change);
-              let mainSel = newSel && !startState.selection.main.eq(newSel.main) && newSel.main.to <= changes.newLength
-                  ? newSel.main : undefined;
-              // Try to apply a composition change to all cursors
-              if (startState.selection.ranges.length > 1 && view.inputState.composing >= 0 &&
-                  change.to <= sel.to && change.to >= sel.to - 10) {
-                  let replaced = view.state.sliceDoc(change.from, change.to);
-                  let compositionRange = compositionSurroundingNode(view) || view.state.doc.lineAt(sel.head);
-                  let offset = sel.to - change.to, size = sel.to - sel.from;
-                  tr = startState.changeByRange(range => {
-                      if (range.from == sel.from && range.to == sel.to)
-                          return { changes, range: mainSel || range.map(changes) };
-                      let to = range.to - offset, from = to - replaced.length;
-                      if (range.to - range.from != size || view.state.sliceDoc(from, to) != replaced ||
-                          // Unfortunately, there's no way to make multiple
-                          // changes in the same node work without aborting
-                          // composition, so cursors in the composition range are
-                          // ignored.
-                          compositionRange && range.to >= compositionRange.from && range.from <= compositionRange.to)
-                          return { range };
-                      let rangeChanges = startState.changes({ from, to, insert: change.insert }), selOff = range.to - sel.to;
-                      return {
-                          changes: rangeChanges,
-                          range: !mainSel ? range.map(rangeChanges) :
-                              EditorSelection.range(Math.max(0, mainSel.anchor + selOff), Math.max(0, mainSel.head + selOff))
-                      };
-                  });
+              for (let p of this.plugins)
+                  p.mustUpdate = update;
+          }
+          for (let i = 0; i < this.plugins.length; i++)
+              this.plugins[i].update(this);
+      }
+      /**
+      @internal
+      */
+      measure(flush = true) {
+          if (this.destroyed)
+              return;
+          if (this.measureScheduled > -1)
+              this.win.cancelAnimationFrame(this.measureScheduled);
+          this.measureScheduled = 0; // Prevent requestMeasure calls from scheduling another animation frame
+          if (flush)
+              this.observer.forceFlush();
+          let updated = null;
+          let sDOM = this.scrollDOM, { scrollTop } = sDOM;
+          let { scrollAnchorPos, scrollAnchorHeight } = this.viewState;
+          this.viewState.scrollAnchorHeight = -1;
+          if (scrollAnchorHeight < 0 || scrollTop != this.viewState.scrollTop) {
+              if (scrollTop > sDOM.scrollHeight - sDOM.clientHeight - 4) {
+                  scrollAnchorPos = -1;
+                  scrollAnchorHeight = this.viewState.heightMap.height;
               }
               else {
-                  tr = {
-                      changes,
-                      selection: mainSel && startState.selection.replaceRange(mainSel)
-                  };
+                  let block = this.viewState.lineBlockAtHeight(scrollTop);
+                  scrollAnchorPos = block.from;
+                  scrollAnchorHeight = block.top;
               }
           }
-          let userEvent = "input.type";
-          if (view.composing) {
-              userEvent += ".compose";
-              if (view.inputState.compositionFirstChange) {
-                  userEvent += ".start";
-                  view.inputState.compositionFirstChange = false;
+          try {
+              for (let i = 0;; i++) {
+                  this.updateState = 1 /* Measuring */;
+                  let oldViewport = this.viewport;
+                  let changed = this.viewState.measure(this);
+                  if (!changed && !this.measureRequests.length && this.viewState.scrollTarget == null)
+                      break;
+                  if (i > 5) {
+                      console.warn(this.measureRequests.length
+                          ? "Measure loop restarted more than 5 times"
+                          : "Viewport failed to stabilize");
+                      break;
+                  }
+                  let measuring = [];
+                  // Only run measure requests in this cycle when the viewport didn't change
+                  if (!(changed & 4 /* Viewport */))
+                      [this.measureRequests, measuring] = [measuring, this.measureRequests];
+                  let measured = measuring.map(m => {
+                      try {
+                          return m.read(this);
+                      }
+                      catch (e) {
+                          logException(this.state, e);
+                          return BadMeasure;
+                      }
+                  });
+                  let update = ViewUpdate.create(this, this.state, []), redrawn = false, scrolled = false;
+                  update.flags |= changed;
+                  if (!updated)
+                      updated = update;
+                  else
+                      updated.flags |= changed;
+                  this.updateState = 2 /* Updating */;
+                  if (!update.empty) {
+                      this.updatePlugins(update);
+                      this.inputState.update(update);
+                      this.updateAttrs();
+                      redrawn = this.docView.update(update);
+                  }
+                  for (let i = 0; i < measuring.length; i++)
+                      if (measured[i] != BadMeasure) {
+                          try {
+                              let m = measuring[i];
+                              if (m.write)
+                                  m.write(measured[i], this);
+                          }
+                          catch (e) {
+                              logException(this.state, e);
+                          }
+                      }
+                  if (this.viewState.editorHeight) {
+                      if (this.viewState.scrollTarget) {
+                          this.docView.scrollIntoView(this.viewState.scrollTarget);
+                          this.viewState.scrollTarget = null;
+                          scrolled = true;
+                      }
+                      else if (scrollAnchorHeight > -1) {
+                          let newAnchorHeight = scrollAnchorPos < 0 ? this.viewState.heightMap.height :
+                              this.viewState.lineBlockAt(scrollAnchorPos).top;
+                          let diff = newAnchorHeight - scrollAnchorHeight;
+                          if (diff > 1 || diff < -1) {
+                              sDOM.scrollTop = scrollTop + diff;
+                              scrolled = true;
+                          }
+                      }
+                  }
+                  if (redrawn)
+                      this.docView.updateSelection(true);
+                  if (this.viewport.from == oldViewport.from && this.viewport.to == oldViewport.to &&
+                      !scrolled && this.measureRequests.length == 0)
+                      break;
+                  scrollAnchorHeight = -1;
               }
           }
-          view.dispatch(tr, { scrollIntoView: true, userEvent });
-          return true;
-      }
-      else if (newSel && !newSel.main.eq(sel)) {
-          let scrollIntoView = false, userEvent = "select";
-          if (view.inputState.lastSelectionTime > Date.now() - 50) {
-              if (view.inputState.lastSelectionOrigin == "select")
-                  scrollIntoView = true;
-              userEvent = view.inputState.lastSelectionOrigin;
+          finally {
+              this.updateState = 0 /* Idle */;
+              this.measureScheduled = -1;
           }
-          view.dispatch({ selection: newSel, scrollIntoView, userEvent });
-          return true;
-      }
-      else {
-          return false;
+          if (updated && !updated.empty)
+              for (let listener of this.state.facet(updateListener))
+                  listener(updated);
       }
-  }
-  function findDiff(a, b, preferredPos, preferredSide) {
-      let minLen = Math.min(a.length, b.length);
-      let from = 0;
-      while (from < minLen && a.charCodeAt(from) == b.charCodeAt(from))
-          from++;
-      if (from == minLen && a.length == b.length)
-          return null;
-      let toA = a.length, toB = b.length;
-      while (toA > 0 && toB > 0 && a.charCodeAt(toA - 1) == b.charCodeAt(toB - 1)) {
-          toA--;
-          toB--;
+      /**
+      Get the CSS classes for the currently active editor themes.
+      */
+      get themeClasses() {
+          return baseThemeID + " " +
+              (this.state.facet(darkTheme) ? baseDarkID : baseLightID) + " " +
+              this.state.facet(theme);
       }
-      if (preferredSide == "end") {
-          let adjust = Math.max(0, from - Math.min(toA, toB));
-          preferredPos -= toA + adjust - from;
+      updateAttrs() {
+          let editorAttrs = attrsFromFacet(this, editorAttributes, {
+              class: "cm-editor" + (this.hasFocus ? " cm-focused " : " ") + this.themeClasses
+          });
+          let contentAttrs = {
+              spellcheck: "false",
+              autocorrect: "off",
+              autocapitalize: "off",
+              translate: "no",
+              contenteditable: !this.state.facet(editable) ? "false" : "true",
+              class: "cm-content",
+              style: `${browser.tabSize}: ${this.state.tabSize}`,
+              role: "textbox",
+              "aria-multiline": "true"
+          };
+          if (this.state.readOnly)
+              contentAttrs["aria-readonly"] = "true";
+          attrsFromFacet(this, contentAttributes, contentAttrs);
+          let changed = this.observer.ignore(() => {
+              let changedContent = updateAttrs(this.contentDOM, this.contentAttrs, contentAttrs);
+              let changedEditor = updateAttrs(this.dom, this.editorAttrs, editorAttrs);
+              return changedContent || changedEditor;
+          });
+          this.editorAttrs = editorAttrs;
+          this.contentAttrs = contentAttrs;
+          return changed;
       }
-      if (toA < from && a.length < b.length) {
-          let move = preferredPos <= from && preferredPos >= toA ? from - preferredPos : 0;
-          from -= move;
-          toB = from + (toB - toA);
-          toA = from;
+      showAnnouncements(trs) {
+          let first = true;
+          for (let tr of trs)
+              for (let effect of tr.effects)
+                  if (effect.is(EditorView.announce)) {
+                      if (first)
+                          this.announceDOM.textContent = "";
+                      first = false;
+                      let div = this.announceDOM.appendChild(document.createElement("div"));
+                      div.textContent = effect.value;
+                  }
       }
-      else if (toB < from) {
-          let move = preferredPos <= from && preferredPos >= toB ? from - preferredPos : 0;
-          from -= move;
-          toA = from + (toA - toB);
-          toB = from;
+      mountStyles() {
+          this.styleModules = this.state.facet(styleModule);
+          StyleModule.mount(this.root, this.styleModules.concat(baseTheme$1).reverse());
       }
-      return { from, toA, toB };
-  }
-  function selectionPoints(view) {
-      let result = [];
-      if (view.root.activeElement != view.contentDOM)
-          return result;
-      let { anchorNode, anchorOffset, focusNode, focusOffset } = view.observer.selectionRange;
-      if (anchorNode) {
-          result.push(new DOMPoint(anchorNode, anchorOffset));
-          if (focusNode != anchorNode || focusOffset != anchorOffset)
-              result.push(new DOMPoint(focusNode, focusOffset));
+      readMeasured() {
+          if (this.updateState == 2 /* Updating */)
+              throw new Error("Reading the editor layout isn't allowed during an update");
+          if (this.updateState == 0 /* Idle */ && this.measureScheduled > -1)
+              this.measure(false);
       }
-      return result;
-  }
-  function selectionFromPoints(points, base) {
-      if (points.length == 0)
-          return null;
-      let anchor = points[0].pos, head = points.length == 2 ? points[1].pos : anchor;
-      return anchor > -1 && head > -1 ? EditorSelection.single(anchor + base, head + base) : null;
-  }
-
-  const observeOptions = {
-      childList: true,
-      characterData: true,
-      subtree: true,
-      attributes: true,
-      characterDataOldValue: true
-  };
-  // IE11 has very broken mutation observers, so we also listen to
-  // DOMCharacterDataModified there
-  const useCharData = browser.ie && browser.ie_version <= 11;
-  class DOMObserver {
-      constructor(view) {
-          this.view = view;
-          this.active = false;
-          // The known selection. Kept in our own object, as opposed to just
-          // directly accessing the selection because:
-          //  - Safari doesn't report the right selection in shadow DOM
-          //  - Reading from the selection forces a DOM layout
-          //  - This way, we can ignore selectionchange events if we have
-          //    already seen the 'new' selection
-          this.selectionRange = new DOMSelectionState;
-          // Set when a selection change is detected, cleared on flush
-          this.selectionChanged = false;
-          this.delayedFlush = -1;
-          this.resizeTimeout = -1;
-          this.queue = [];
-          this.delayedAndroidKey = null;
-          this.flushingAndroidKey = -1;
-          this.lastChange = 0;
-          this.scrollTargets = [];
-          this.intersection = null;
-          this.resizeScroll = null;
-          this.resizeContent = null;
-          this.intersecting = false;
-          this.gapIntersection = null;
-          this.gaps = [];
-          // Timeout for scheduling check of the parents that need scroll handlers
-          this.parentCheck = -1;
-          this.dom = view.contentDOM;
-          this.observer = new MutationObserver(mutations => {
-              for (let mut of mutations)
-                  this.queue.push(mut);
-              // IE11 will sometimes (on typing over a selection or
-              // backspacing out a single character text node) call the
-              // observer callback before actually updating the DOM.
-              //
-              // Unrelatedly, iOS Safari will, when ending a composition,
-              // sometimes first clear it, deliver the mutations, and then
-              // reinsert the finished text. CodeMirror's handling of the
-              // deletion will prevent the reinsertion from happening,
-              // breaking composition.
-              if ((browser.ie && browser.ie_version <= 11 || browser.ios && view.composing) &&
-                  mutations.some(m => m.type == "childList" && m.removedNodes.length ||
-                      m.type == "characterData" && m.oldValue.length > m.target.nodeValue.length))
-                  this.flushSoon();
-              else
-                  this.flush();
-          });
-          if (useCharData)
-              this.onCharData = (event) => {
-                  this.queue.push({ target: event.target,
-                      type: "characterData",
-                      oldValue: event.prevValue });
-                  this.flushSoon();
-              };
-          this.onSelectionChange = this.onSelectionChange.bind(this);
-          this.onResize = this.onResize.bind(this);
-          this.onPrint = this.onPrint.bind(this);
-          this.onScroll = this.onScroll.bind(this);
-          if (typeof ResizeObserver == "function") {
-              this.resizeScroll = new ResizeObserver(() => {
-                  var _a;
-                  if (((_a = this.view.docView) === null || _a === void 0 ? void 0 : _a.lastUpdate) < Date.now() - 75)
-                      this.onResize();
-              });
-              this.resizeScroll.observe(view.scrollDOM);
-              this.resizeContent = new ResizeObserver(() => this.view.requestMeasure());
-              this.resizeContent.observe(view.contentDOM);
-          }
-          this.addWindowListeners(this.win = view.win);
-          this.start();
-          if (typeof IntersectionObserver == "function") {
-              this.intersection = new IntersectionObserver(entries => {
-                  if (this.parentCheck < 0)
-                      this.parentCheck = setTimeout(this.listenForScroll.bind(this), 1000);
-                  if (entries.length > 0 && (entries[entries.length - 1].intersectionRatio > 0) != this.intersecting) {
-                      this.intersecting = !this.intersecting;
-                      if (this.intersecting != this.view.inView)
-                          this.onScrollChanged(document.createEvent("Event"));
+      /**
+      Schedule a layout measurement, optionally providing callbacks to
+      do custom DOM measuring followed by a DOM write phase. Using
+      this is preferable reading DOM layout directly from, for
+      example, an event handler, because it'll make sure measuring and
+      drawing done by other components is synchronized, avoiding
+      unnecessary DOM layout computations.
+      */
+      requestMeasure(request) {
+          if (this.measureScheduled < 0)
+              this.measureScheduled = this.win.requestAnimationFrame(() => this.measure());
+          if (request) {
+              if (this.measureRequests.indexOf(request) > -1)
+                  return;
+              if (request.key != null)
+                  for (let i = 0; i < this.measureRequests.length; i++) {
+                      if (this.measureRequests[i].key === request.key) {
+                          this.measureRequests[i] = request;
+                          return;
+                      }
                   }
-              }, {});
-              this.intersection.observe(this.dom);
-              this.gapIntersection = new IntersectionObserver(entries => {
-                  if (entries.length > 0 && entries[entries.length - 1].intersectionRatio > 0)
-                      this.onScrollChanged(document.createEvent("Event"));
-              }, {});
+              this.measureRequests.push(request);
           }
-          this.listenForScroll();
-          this.readSelectionRange();
-      }
-      onScrollChanged(e) {
-          this.view.inputState.runScrollHandlers(this.view, e);
-          if (this.intersecting)
-              this.view.measure();
       }
-      onScroll(e) {
-          if (this.intersecting)
-              this.flush(false);
-          this.onScrollChanged(e);
+      /**
+      Get the value of a specific plugin, if present. Note that
+      plugins that crash can be dropped from a view, so even when you
+      know you registered a given plugin, it is recommended to check
+      the return value of this method.
+      */
+      plugin(plugin) {
+          let known = this.pluginMap.get(plugin);
+          if (known === undefined || known && known.spec != plugin)
+              this.pluginMap.set(plugin, known = this.plugins.find(p => p.spec == plugin) || null);
+          return known && known.update(this).value;
       }
-      onResize() {
-          if (this.resizeTimeout < 0)
-              this.resizeTimeout = setTimeout(() => {
-                  this.resizeTimeout = -1;
-                  this.view.requestMeasure();
-              }, 50);
+      /**
+      The top position of the document, in screen coordinates. This
+      may be negative when the editor is scrolled down. Points
+      directly to the top of the first line, not above the padding.
+      */
+      get documentTop() {
+          return this.contentDOM.getBoundingClientRect().top + this.viewState.paddingTop;
       }
-      onPrint() {
-          this.view.viewState.printing = true;
-          this.view.measure();
-          setTimeout(() => {
-              this.view.viewState.printing = false;
-              this.view.requestMeasure();
-          }, 500);
+      /**
+      Reports the padding above and below the document.
+      */
+      get documentPadding() {
+          return { top: this.viewState.paddingTop, bottom: this.viewState.paddingBottom };
       }
-      updateGaps(gaps) {
-          if (this.gapIntersection && (gaps.length != this.gaps.length || this.gaps.some((g, i) => g != gaps[i]))) {
-              this.gapIntersection.disconnect();
-              for (let gap of gaps)
-                  this.gapIntersection.observe(gap);
-              this.gaps = gaps;
-          }
-      }
-      onSelectionChange(event) {
-          let wasChanged = this.selectionChanged;
-          if (!this.readSelectionRange() || this.delayedAndroidKey)
-              return;
-          let { view } = this, sel = this.selectionRange;
-          if (view.state.facet(editable) ? view.root.activeElement != this.dom : !hasSelection(view.dom, sel))
-              return;
-          let context = sel.anchorNode && view.docView.nearest(sel.anchorNode);
-          if (context && context.ignoreEvent(event)) {
-              if (!wasChanged)
-                  this.selectionChanged = false;
-              return;
-          }
-          // Deletions on IE11 fire their events in the wrong order, giving
-          // us a selection change event before the DOM changes are
-          // reported.
-          // Chrome Android has a similar issue when backspacing out a
-          // selection (#645).
-          if ((browser.ie && browser.ie_version <= 11 || browser.android && browser.chrome) && !view.state.selection.main.empty &&
-              // (Selection.isCollapsed isn't reliable on IE)
-              sel.focusNode && isEquivalentPosition(sel.focusNode, sel.focusOffset, sel.anchorNode, sel.anchorOffset))
-              this.flushSoon();
-          else
-              this.flush(false);
-      }
-      readSelectionRange() {
-          let { view } = this;
-          // The Selection object is broken in shadow roots in Safari. See
-          // https://github.com/codemirror/dev/issues/414
-          let range = browser.safari && view.root.nodeType == 11 &&
-              deepActiveElement(this.dom.ownerDocument) == this.dom &&
-              safariSelectionRangeHack(this.view) || getSelection(view.root);
-          if (!range || this.selectionRange.eq(range))
-              return false;
-          let local = hasSelection(this.dom, range);
-          // Detect the situation where the browser has, on focus, moved the
-          // selection to the start of the content element. Reset it to the
-          // position from the editor state.
-          if (local && !this.selectionChanged &&
-              view.inputState.lastFocusTime > Date.now() - 200 &&
-              view.inputState.lastTouchTime < Date.now() - 300 &&
-              atElementStart(this.dom, range)) {
-              this.view.inputState.lastFocusTime = 0;
-              view.docView.updateSelection();
-              return false;
-          }
-          this.selectionRange.setRange(range);
-          if (local)
-              this.selectionChanged = true;
-          return true;
-      }
-      setSelectionRange(anchor, head) {
-          this.selectionRange.set(anchor.node, anchor.offset, head.node, head.offset);
-          this.selectionChanged = false;
-      }
-      clearSelectionRange() {
-          this.selectionRange.set(null, 0, null, 0);
-      }
-      listenForScroll() {
-          this.parentCheck = -1;
-          let i = 0, changed = null;
-          for (let dom = this.dom; dom;) {
-              if (dom.nodeType == 1) {
-                  if (!changed && i < this.scrollTargets.length && this.scrollTargets[i] == dom)
-                      i++;
-                  else if (!changed)
-                      changed = this.scrollTargets.slice(0, i);
-                  if (changed)
-                      changed.push(dom);
-                  dom = dom.assignedSlot || dom.parentNode;
-              }
-              else if (dom.nodeType == 11) { // Shadow root
-                  dom = dom.host;
-              }
-              else {
-                  break;
-              }
-          }
-          if (i < this.scrollTargets.length && !changed)
-              changed = this.scrollTargets.slice(0, i);
-          if (changed) {
-              for (let dom of this.scrollTargets)
-                  dom.removeEventListener("scroll", this.onScroll);
-              for (let dom of this.scrollTargets = changed)
-                  dom.addEventListener("scroll", this.onScroll);
-          }
-      }
-      ignore(f) {
-          if (!this.active)
-              return f();
-          try {
-              this.stop();
-              return f();
-          }
-          finally {
-              this.start();
-              this.clear();
-          }
-      }
-      start() {
-          if (this.active)
-              return;
-          this.observer.observe(this.dom, observeOptions);
-          if (useCharData)
-              this.dom.addEventListener("DOMCharacterDataModified", this.onCharData);
-          this.active = true;
-      }
-      stop() {
-          if (!this.active)
-              return;
-          this.active = false;
-          this.observer.disconnect();
-          if (useCharData)
-              this.dom.removeEventListener("DOMCharacterDataModified", this.onCharData);
-      }
-      // Throw away any pending changes
-      clear() {
-          this.processRecords();
-          this.queue.length = 0;
-          this.selectionChanged = false;
-      }
-      // Chrome Android, especially in combination with GBoard, not only
-      // doesn't reliably fire regular key events, but also often
-      // surrounds the effect of enter or backspace with a bunch of
-      // composition events that, when interrupted, cause text duplication
-      // or other kinds of corruption. This hack makes the editor back off
-      // from handling DOM changes for a moment when such a key is
-      // detected (via beforeinput or keydown), and then tries to flush
-      // them or, if that has no effect, dispatches the given key.
-      delayAndroidKey(key, keyCode) {
-          var _a;
-          if (!this.delayedAndroidKey) {
-              let flush = () => {
-                  let key = this.delayedAndroidKey;
-                  if (key) {
-                      this.clearDelayedAndroidKey();
-                      if (!this.flush() && key.force)
-                          dispatchKey(this.dom, key.key, key.keyCode);
-                  }
-              };
-              this.flushingAndroidKey = this.view.win.requestAnimationFrame(flush);
-          }
-          // Since backspace beforeinput is sometimes signalled spuriously,
-          // Enter always takes precedence.
-          if (!this.delayedAndroidKey || key == "Enter")
-              this.delayedAndroidKey = {
-                  key, keyCode,
-                  // Only run the key handler when no changes are detected if
-                  // this isn't coming right after another change, in which case
-                  // it is probably part of a weird chain of updates, and should
-                  // be ignored if it returns the DOM to its previous state.
-                  force: this.lastChange < Date.now() - 50 || !!((_a = this.delayedAndroidKey) === null || _a === void 0 ? void 0 : _a.force)
-              };
-      }
-      clearDelayedAndroidKey() {
-          this.win.cancelAnimationFrame(this.flushingAndroidKey);
-          this.delayedAndroidKey = null;
-          this.flushingAndroidKey = -1;
-      }
-      flushSoon() {
-          if (this.delayedFlush < 0)
-              this.delayedFlush = this.view.win.requestAnimationFrame(() => { this.delayedFlush = -1; this.flush(); });
-      }
-      forceFlush() {
-          if (this.delayedFlush >= 0) {
-              this.view.win.cancelAnimationFrame(this.delayedFlush);
-              this.delayedFlush = -1;
-          }
-          this.flush();
-      }
-      processRecords() {
-          let records = this.queue;
-          for (let mut of this.observer.takeRecords())
-              records.push(mut);
-          if (records.length)
-              this.queue = [];
-          let from = -1, to = -1, typeOver = false;
-          for (let record of records) {
-              let range = this.readMutation(record);
-              if (!range)
-                  continue;
-              if (range.typeOver)
-                  typeOver = true;
-              if (from == -1) {
-                  ({ from, to } = range);
-              }
-              else {
-                  from = Math.min(range.from, from);
-                  to = Math.max(range.to, to);
-              }
-          }
-          return { from, to, typeOver };
-      }
-      readChange() {
-          let { from, to, typeOver } = this.processRecords();
-          let newSel = this.selectionChanged && hasSelection(this.dom, this.selectionRange);
-          if (from < 0 && !newSel)
-              return null;
-          if (from > -1)
-              this.lastChange = Date.now();
-          this.view.inputState.lastFocusTime = 0;
-          this.selectionChanged = false;
-          return new DOMChange(this.view, from, to, typeOver);
-      }
-      // Apply pending changes, if any
-      flush(readSelection = true) {
-          // Completely hold off flushing when pending keys are set—the code
-          // managing those will make sure processRecords is called and the
-          // view is resynchronized after
-          if (this.delayedFlush >= 0 || this.delayedAndroidKey)
-              return false;
-          if (readSelection)
-              this.readSelectionRange();
-          let domChange = this.readChange();
-          if (!domChange)
-              return false;
-          let startState = this.view.state;
-          let handled = applyDOMChange(this.view, domChange);
-          // The view wasn't updated
-          if (this.view.state == startState)
-              this.view.update([]);
-          return handled;
-      }
-      readMutation(rec) {
-          let cView = this.view.docView.nearest(rec.target);
-          if (!cView || cView.ignoreMutation(rec))
-              return null;
-          cView.markDirty(rec.type == "attributes");
-          if (rec.type == "attributes")
-              cView.dirty |= 4 /* Dirty.Attrs */;
-          if (rec.type == "childList") {
-              let childBefore = findChild(cView, rec.previousSibling || rec.target.previousSibling, -1);
-              let childAfter = findChild(cView, rec.nextSibling || rec.target.nextSibling, 1);
-              return { from: childBefore ? cView.posAfter(childBefore) : cView.posAtStart,
-                  to: childAfter ? cView.posBefore(childAfter) : cView.posAtEnd, typeOver: false };
-          }
-          else if (rec.type == "characterData") {
-              return { from: cView.posAtStart, to: cView.posAtEnd, typeOver: rec.target.nodeValue == rec.oldValue };
-          }
-          else {
-              return null;
-          }
-      }
-      setWindow(win) {
-          if (win != this.win) {
-              this.removeWindowListeners(this.win);
-              this.win = win;
-              this.addWindowListeners(this.win);
-          }
-      }
-      addWindowListeners(win) {
-          win.addEventListener("resize", this.onResize);
-          win.addEventListener("beforeprint", this.onPrint);
-          win.addEventListener("scroll", this.onScroll);
-          win.document.addEventListener("selectionchange", this.onSelectionChange);
-      }
-      removeWindowListeners(win) {
-          win.removeEventListener("scroll", this.onScroll);
-          win.removeEventListener("resize", this.onResize);
-          win.removeEventListener("beforeprint", this.onPrint);
-          win.document.removeEventListener("selectionchange", this.onSelectionChange);
-      }
-      destroy() {
-          var _a, _b, _c, _d;
-          this.stop();
-          (_a = this.intersection) === null || _a === void 0 ? void 0 : _a.disconnect();
-          (_b = this.gapIntersection) === null || _b === void 0 ? void 0 : _b.disconnect();
-          (_c = this.resizeScroll) === null || _c === void 0 ? void 0 : _c.disconnect();
-          (_d = this.resizeContent) === null || _d === void 0 ? void 0 : _d.disconnect();
-          for (let dom of this.scrollTargets)
-              dom.removeEventListener("scroll", this.onScroll);
-          this.removeWindowListeners(this.win);
-          clearTimeout(this.parentCheck);
-          clearTimeout(this.resizeTimeout);
-          this.win.cancelAnimationFrame(this.delayedFlush);
-          this.win.cancelAnimationFrame(this.flushingAndroidKey);
-      }
-  }
-  function findChild(cView, dom, dir) {
-      while (dom) {
-          let curView = ContentView.get(dom);
-          if (curView && curView.parent == cView)
-              return curView;
-          let parent = dom.parentNode;
-          dom = parent != cView.dom ? parent : dir > 0 ? dom.nextSibling : dom.previousSibling;
-      }
-      return null;
-  }
-  // Used to work around a Safari Selection/shadow DOM bug (#414)
-  function safariSelectionRangeHack(view) {
-      let found = null;
-      // Because Safari (at least in 2018-2021) doesn't provide regular
-      // access to the selection inside a shadowroot, we have to perform a
-      // ridiculous hack to get at it—using `execCommand` to trigger a
-      // `beforeInput` event so that we can read the target range from the
-      // event.
-      function read(event) {
-          event.preventDefault();
-          event.stopImmediatePropagation();
-          found = event.getTargetRanges()[0];
+      /**
+      Find the text line or block widget at the given vertical
+      position (which is interpreted as relative to the [top of the
+      document](https://codemirror.net/6/docs/ref/#view.EditorView.documentTop)).
+      */
+      elementAtHeight(height) {
+          this.readMeasured();
+          return this.viewState.elementAtHeight(height);
       }
-      view.contentDOM.addEventListener("beforeinput", read, true);
-      view.dom.ownerDocument.execCommand("indent");
-      view.contentDOM.removeEventListener("beforeinput", read, true);
-      if (!found)
-          return null;
-      let anchorNode = found.startContainer, anchorOffset = found.startOffset;
-      let focusNode = found.endContainer, focusOffset = found.endOffset;
-      let curAnchor = view.docView.domAtPos(view.state.selection.main.anchor);
-      // Since such a range doesn't distinguish between anchor and head,
-      // use a heuristic that flips it around if its end matches the
-      // current anchor.
-      if (isEquivalentPosition(curAnchor.node, curAnchor.offset, focusNode, focusOffset))
-          [anchorNode, anchorOffset, focusNode, focusOffset] = [focusNode, focusOffset, anchorNode, anchorOffset];
-      return { anchorNode, anchorOffset, focusNode, focusOffset };
-  }
-
-  // The editor's update state machine looks something like this:
-  //
-  //     Idle → Updating ⇆ Idle (unchecked) → Measuring → Idle
-  //                                         ↑      ↓
-  //                                         Updating (measure)
-  //
-  // The difference between 'Idle' and 'Idle (unchecked)' lies in
-  // whether a layout check has been scheduled. A regular update through
-  // the `update` method updates the DOM in a write-only fashion, and
-  // relies on a check (scheduled with `requestAnimationFrame`) to make
-  // sure everything is where it should be and the viewport covers the
-  // visible code. That check continues to measure and then optionally
-  // update until it reaches a coherent state.
-  /**
-  An editor view represents the editor's user interface. It holds
-  the editable DOM surface, and possibly other elements such as the
-  line number gutter. It handles events and dispatches state
-  transactions for editing actions.
-  */
-  class EditorView {
       /**
-      Construct a new view. You'll want to either provide a `parent`
-      option, or put `view.dom` into your document after creating a
-      view, so that the user can see the editor.
+      Find the line block (see
+      [`lineBlockAt`](https://codemirror.net/6/docs/ref/#view.EditorView.lineBlockAt) at the given
+      height, again interpreted relative to the [top of the
+      document](https://codemirror.net/6/docs/ref/#view.EditorView.documentTop).
       */
-      constructor(config = {}) {
-          this.plugins = [];
-          this.pluginMap = new Map;
-          this.editorAttrs = {};
-          this.contentAttrs = {};
-          this.bidiCache = [];
-          this.destroyed = false;
-          /**
-          @internal
-          */
-          this.updateState = 2 /* UpdateState.Updating */;
-          /**
-          @internal
-          */
-          this.measureScheduled = -1;
-          /**
-          @internal
-          */
-          this.measureRequests = [];
-          this.contentDOM = document.createElement("div");
-          this.scrollDOM = document.createElement("div");
-          this.scrollDOM.tabIndex = -1;
-          this.scrollDOM.className = "cm-scroller";
-          this.scrollDOM.appendChild(this.contentDOM);
-          this.announceDOM = document.createElement("div");
-          this.announceDOM.style.cssText = "position: fixed; top: -10000px";
-          this.announceDOM.setAttribute("aria-live", "polite");
-          this.dom = document.createElement("div");
-          this.dom.appendChild(this.announceDOM);
-          this.dom.appendChild(this.scrollDOM);
-          this._dispatch = config.dispatch || ((tr) => this.update([tr]));
-          this.dispatch = this.dispatch.bind(this);
-          this._root = (config.root || getRoot(config.parent) || document);
-          this.viewState = new ViewState(config.state || EditorState.create(config));
-          this.plugins = this.state.facet(viewPlugin).map(spec => new PluginInstance(spec));
-          for (let plugin of this.plugins)
-              plugin.update(this);
-          this.observer = new DOMObserver(this);
-          this.inputState = new InputState(this);
-          this.inputState.ensureHandlers(this, this.plugins);
-          this.docView = new DocView(this);
-          this.mountStyles();
-          this.updateAttrs();
-          this.updateState = 0 /* UpdateState.Idle */;
-          this.requestMeasure();
-          if (config.parent)
-              config.parent.appendChild(this.dom);
+      lineBlockAtHeight(height) {
+          this.readMeasured();
+          return this.viewState.lineBlockAtHeight(height);
       }
       /**
-      The current editor state.
+      Get the extent and vertical position of all [line
+      blocks](https://codemirror.net/6/docs/ref/#view.EditorView.lineBlockAt) in the viewport. Positions
+      are relative to the [top of the
+      document](https://codemirror.net/6/docs/ref/#view.EditorView.documentTop);
       */
-      get state() { return this.viewState.state; }
+      get viewportLineBlocks() {
+          return this.viewState.viewportLines;
+      }
       /**
-      To be able to display large documents without consuming too much
-      memory or overloading the browser, CodeMirror only draws the
-      code that is visible (plus a margin around it) to the DOM. This
-      property tells you the extent of the current drawn viewport, in
-      document positions.
+      Find the line block around the given document position. A line
+      block is a range delimited on both sides by either a
+      non-[hidden](https://codemirror.net/6/docs/ref/#view.Decoration^replace) line breaks, or the
+      start/end of the document. It will usually just hold a line of
+      text, but may be broken into multiple textblocks by block
+      widgets.
       */
-      get viewport() { return this.viewState.viewport; }
+      lineBlockAt(pos) {
+          return this.viewState.lineBlockAt(pos);
+      }
       /**
-      When there are, for example, large collapsed ranges in the
-      viewport, its size can be a lot bigger than the actual visible
-      content. Thus, if you are doing something like styling the
-      content in the viewport, it is preferable to only do so for
-      these ranges, which are the subset of the viewport that is
-      actually drawn.
+      The editor's total content height.
       */
-      get visibleRanges() { return this.viewState.visibleRanges; }
+      get contentHeight() {
+          return this.viewState.contentHeight;
+      }
       /**
-      Returns false when the editor is entirely scrolled out of view
-      or otherwise hidden.
+      Move a cursor position by [grapheme
+      cluster](https://codemirror.net/6/docs/ref/#state.findClusterBreak). `forward` determines whether
+      the motion is away from the line start, or towards it. In
+      bidirectional text, the line is traversed in visual order, using
+      the editor's [text direction](https://codemirror.net/6/docs/ref/#view.EditorView.textDirection).
+      When the start position was the last one on the line, the
+      returned position will be across the line break. If there is no
+      further line, the original position is returned.
+      
+      By default, this method moves over a single cluster. The
+      optional `by` argument can be used to move across more. It will
+      be called with the first cluster as argument, and should return
+      a predicate that determines, for each subsequent cluster,
+      whether it should also be moved over.
       */
-      get inView() { return this.viewState.inView; }
+      moveByChar(start, forward, by) {
+          return skipAtoms(this, start, moveByChar(this, start, forward, by));
+      }
       /**
-      Indicates whether the user is currently composing text via
-      [IME](https://en.wikipedia.org/wiki/Input_method), and at least
-      one change has been made in the current composition.
+      Move a cursor position across the next group of either
+      [letters](https://codemirror.net/6/docs/ref/#state.EditorState.charCategorizer) or non-letter
+      non-whitespace characters.
       */
-      get composing() { return this.inputState.composing > 0; }
+      moveByGroup(start, forward) {
+          return skipAtoms(this, start, moveByChar(this, start, forward, initial => byGroup(this, start.head, initial)));
+      }
       /**
-      Indicates whether the user is currently in composing state. Note
-      that on some platforms, like Android, this will be the case a
-      lot, since just putting the cursor on a word starts a
-      composition there.
+      Move to the next line boundary in the given direction. If
+      `includeWrap` is true, line wrapping is on, and there is a
+      further wrap point on the current line, the wrap point will be
+      returned. Otherwise this function will return the start or end
+      of the line.
       */
-      get compositionStarted() { return this.inputState.composing >= 0; }
+      moveToLineBoundary(start, forward, includeWrap = true) {
+          return moveToLineBoundary(this, start, forward, includeWrap);
+      }
       /**
-      The document or shadow root that the view lives in.
+      Move a cursor position vertically. When `distance` isn't given,
+      it defaults to moving to the next line (including wrapped
+      lines). Otherwise, `distance` should provide a positive distance
+      in pixels.
+      
+      When `start` has a
+      [`goalColumn`](https://codemirror.net/6/docs/ref/#state.SelectionRange.goalColumn), the vertical
+      motion will use that as a target horizontal position. Otherwise,
+      the cursor's own horizontal position is used. The returned
+      cursor will have its goal column set to whichever column was
+      used.
       */
-      get root() { return this._root; }
+      moveVertically(start, forward, distance) {
+          return skipAtoms(this, start, moveVertically(this, start, forward, distance));
+      }
       /**
-      @internal
+      Find the DOM parent node and offset (child offset if `node` is
+      an element, character offset when it is a text node) at the
+      given document position.
+      
+      Note that for positions that aren't currently in
+      `visibleRanges`, the resulting DOM position isn't necessarily
+      meaningful (it may just point before or after a placeholder
+      element).
       */
-      get win() { return this.dom.ownerDocument.defaultView || window; }
-      dispatch(...input) {
-          this._dispatch(input.length == 1 && input[0] instanceof Transaction ? input[0]
-              : this.state.update(...input));
-      }
-      /**
-      Update the view for the given array of transactions. This will
-      update the visible document and selection to match the state
-      produced by the transactions, and notify view plugins of the
-      change. You should usually call
-      [`dispatch`](https://codemirror.net/6/docs/ref/#view.EditorView.dispatch) instead, which uses this
-      as a primitive.
-      */
-      update(transactions) {
-          if (this.updateState != 0 /* UpdateState.Idle */)
-              throw new Error("Calls to EditorView.update are not allowed while an update is in progress");
-          let redrawn = false, attrsChanged = false, update;
-          let state = this.state;
-          for (let tr of transactions) {
-              if (tr.startState != state)
-                  throw new RangeError("Trying to update state with a transaction that doesn't start from the previous state.");
-              state = tr.state;
-          }
-          if (this.destroyed) {
-              this.viewState.state = state;
-              return;
-          }
-          // If there was a pending DOM change, eagerly read it and try to
-          // apply it after the given transactions.
-          let pendingKey = this.observer.delayedAndroidKey, domChange = null;
-          if (pendingKey) {
-              this.observer.clearDelayedAndroidKey();
-              domChange = this.observer.readChange();
-              // Only try to apply DOM changes if the transactions didn't
-              // change the doc or selection.
-              if (domChange && !this.state.doc.eq(state.doc) || !this.state.selection.eq(state.selection))
-                  domChange = null;
-          }
-          else {
-              this.observer.clear();
-          }
-          // When the phrases change, redraw the editor
-          if (state.facet(EditorState.phrases) != this.state.facet(EditorState.phrases))
-              return this.setState(state);
-          update = ViewUpdate.create(this, state, transactions);
-          let scrollTarget = this.viewState.scrollTarget;
-          try {
-              this.updateState = 2 /* UpdateState.Updating */;
-              for (let tr of transactions) {
-                  if (scrollTarget)
-                      scrollTarget = scrollTarget.map(tr.changes);
-                  if (tr.scrollIntoView) {
-                      let { main } = tr.state.selection;
-                      scrollTarget = new ScrollTarget(main.empty ? main : EditorSelection.cursor(main.head, main.head > main.anchor ? -1 : 1));
-                  }
-                  for (let e of tr.effects)
-                      if (e.is(scrollIntoView))
-                          scrollTarget = e.value;
-              }
-              this.viewState.update(update, scrollTarget);
-              this.bidiCache = CachedOrder.update(this.bidiCache, update.changes);
-              if (!update.empty) {
-                  this.updatePlugins(update);
-                  this.inputState.update(update);
-              }
-              redrawn = this.docView.update(update);
-              if (this.state.facet(styleModule) != this.styleModules)
-                  this.mountStyles();
-              attrsChanged = this.updateAttrs();
-              this.showAnnouncements(transactions);
-              this.docView.updateSelection(redrawn, transactions.some(tr => tr.isUserEvent("select.pointer")));
-          }
-          finally {
-              this.updateState = 0 /* UpdateState.Idle */;
-          }
-          if (update.startState.facet(theme) != update.state.facet(theme))
-              this.viewState.mustMeasureContent = true;
-          if (redrawn || attrsChanged || scrollTarget || this.viewState.mustEnforceCursorAssoc || this.viewState.mustMeasureContent)
-              this.requestMeasure();
-          if (!update.empty)
-              for (let listener of this.state.facet(updateListener))
-                  listener(update);
-          if (domChange) {
-              if (!applyDOMChange(this, domChange) && pendingKey.force)
-                  dispatchKey(this.contentDOM, pendingKey.key, pendingKey.keyCode);
-          }
-      }
-      /**
-      Reset the view to the given state. (This will cause the entire
-      document to be redrawn and all view plugins to be reinitialized,
-      so you should probably only use it when the new state isn't
-      derived from the old state. Otherwise, use
-      [`dispatch`](https://codemirror.net/6/docs/ref/#view.EditorView.dispatch) instead.)
-      */
-      setState(newState) {
-          if (this.updateState != 0 /* UpdateState.Idle */)
-              throw new Error("Calls to EditorView.setState are not allowed while an update is in progress");
-          if (this.destroyed) {
-              this.viewState.state = newState;
-              return;
-          }
-          this.updateState = 2 /* UpdateState.Updating */;
-          let hadFocus = this.hasFocus;
-          try {
-              for (let plugin of this.plugins)
-                  plugin.destroy(this);
-              this.viewState = new ViewState(newState);
-              this.plugins = newState.facet(viewPlugin).map(spec => new PluginInstance(spec));
-              this.pluginMap.clear();
-              for (let plugin of this.plugins)
-                  plugin.update(this);
-              this.docView = new DocView(this);
-              this.inputState.ensureHandlers(this, this.plugins);
-              this.mountStyles();
-              this.updateAttrs();
-              this.bidiCache = [];
-          }
-          finally {
-              this.updateState = 0 /* UpdateState.Idle */;
-          }
-          if (hadFocus)
-              this.focus();
-          this.requestMeasure();
-      }
-      updatePlugins(update) {
-          let prevSpecs = update.startState.facet(viewPlugin), specs = update.state.facet(viewPlugin);
-          if (prevSpecs != specs) {
-              let newPlugins = [];
-              for (let spec of specs) {
-                  let found = prevSpecs.indexOf(spec);
-                  if (found < 0) {
-                      newPlugins.push(new PluginInstance(spec));
-                  }
-                  else {
-                      let plugin = this.plugins[found];
-                      plugin.mustUpdate = update;
-                      newPlugins.push(plugin);
-                  }
-              }
-              for (let plugin of this.plugins)
-                  if (plugin.mustUpdate != update)
-                      plugin.destroy(this);
-              this.plugins = newPlugins;
-              this.pluginMap.clear();
-              this.inputState.ensureHandlers(this, this.plugins);
-          }
-          else {
-              for (let p of this.plugins)
-                  p.mustUpdate = update;
-          }
-          for (let i = 0; i < this.plugins.length; i++)
-              this.plugins[i].update(this);
-      }
-      /**
-      @internal
-      */
-      measure(flush = true) {
-          if (this.destroyed)
-              return;
-          if (this.measureScheduled > -1)
-              cancelAnimationFrame(this.measureScheduled);
-          this.measureScheduled = 0; // Prevent requestMeasure calls from scheduling another animation frame
-          if (flush)
-              this.observer.forceFlush();
-          let updated = null;
-          let { scrollHeight, scrollTop, clientHeight } = this.scrollDOM;
-          let refHeight = scrollTop > scrollHeight - clientHeight - 4 ? scrollHeight : scrollTop;
-          try {
-              for (let i = 0;; i++) {
-                  this.updateState = 1 /* UpdateState.Measuring */;
-                  let oldViewport = this.viewport;
-                  let refBlock = this.viewState.lineBlockAtHeight(refHeight);
-                  let changed = this.viewState.measure(this);
-                  if (!changed && !this.measureRequests.length && this.viewState.scrollTarget == null)
-                      break;
-                  if (i > 5) {
-                      console.warn(this.measureRequests.length
-                          ? "Measure loop restarted more than 5 times"
-                          : "Viewport failed to stabilize");
-                      break;
-                  }
-                  let measuring = [];
-                  // Only run measure requests in this cycle when the viewport didn't change
-                  if (!(changed & 4 /* UpdateFlag.Viewport */))
-                      [this.measureRequests, measuring] = [measuring, this.measureRequests];
-                  let measured = measuring.map(m => {
-                      try {
-                          return m.read(this);
-                      }
-                      catch (e) {
-                          logException(this.state, e);
-                          return BadMeasure;
-                      }
-                  });
-                  let update = ViewUpdate.create(this, this.state, []), redrawn = false, scrolled = false;
-                  update.flags |= changed;
-                  if (!updated)
-                      updated = update;
-                  else
-                      updated.flags |= changed;
-                  this.updateState = 2 /* UpdateState.Updating */;
-                  if (!update.empty) {
-                      this.updatePlugins(update);
-                      this.inputState.update(update);
-                      this.updateAttrs();
-                      redrawn = this.docView.update(update);
-                  }
-                  for (let i = 0; i < measuring.length; i++)
-                      if (measured[i] != BadMeasure) {
-                          try {
-                              let m = measuring[i];
-                              if (m.write)
-                                  m.write(measured[i], this);
-                          }
-                          catch (e) {
-                              logException(this.state, e);
-                          }
-                      }
-                  if (this.viewState.editorHeight) {
-                      if (this.viewState.scrollTarget) {
-                          this.docView.scrollIntoView(this.viewState.scrollTarget);
-                          this.viewState.scrollTarget = null;
-                          scrolled = true;
-                      }
-                      else {
-                          let diff = this.viewState.lineBlockAt(refBlock.from).top - refBlock.top;
-                          if (diff > 1 || diff < -1) {
-                              this.scrollDOM.scrollTop += diff;
-                              scrolled = true;
-                          }
-                      }
-                  }
-                  if (redrawn)
-                      this.docView.updateSelection(true);
-                  if (this.viewport.from == oldViewport.from && this.viewport.to == oldViewport.to &&
-                      !scrolled && this.measureRequests.length == 0)
-                      break;
-              }
-          }
-          finally {
-              this.updateState = 0 /* UpdateState.Idle */;
-              this.measureScheduled = -1;
-          }
-          if (updated && !updated.empty)
-              for (let listener of this.state.facet(updateListener))
-                  listener(updated);
-      }
-      /**
-      Get the CSS classes for the currently active editor themes.
-      */
-      get themeClasses() {
-          return baseThemeID + " " +
-              (this.state.facet(darkTheme) ? baseDarkID : baseLightID) + " " +
-              this.state.facet(theme);
-      }
-      updateAttrs() {
-          let editorAttrs = attrsFromFacet(this, editorAttributes, {
-              class: "cm-editor" + (this.hasFocus ? " cm-focused " : " ") + this.themeClasses
-          });
-          let contentAttrs = {
-              spellcheck: "false",
-              autocorrect: "off",
-              autocapitalize: "off",
-              translate: "no",
-              contenteditable: !this.state.facet(editable) ? "false" : "true",
-              class: "cm-content",
-              style: `${browser.tabSize}: ${this.state.tabSize}`,
-              role: "textbox",
-              "aria-multiline": "true"
-          };
-          if (this.state.readOnly)
-              contentAttrs["aria-readonly"] = "true";
-          attrsFromFacet(this, contentAttributes, contentAttrs);
-          let changed = this.observer.ignore(() => {
-              let changedContent = updateAttrs(this.contentDOM, this.contentAttrs, contentAttrs);
-              let changedEditor = updateAttrs(this.dom, this.editorAttrs, editorAttrs);
-              return changedContent || changedEditor;
-          });
-          this.editorAttrs = editorAttrs;
-          this.contentAttrs = contentAttrs;
-          return changed;
-      }
-      showAnnouncements(trs) {
-          let first = true;
-          for (let tr of trs)
-              for (let effect of tr.effects)
-                  if (effect.is(EditorView.announce)) {
-                      if (first)
-                          this.announceDOM.textContent = "";
-                      first = false;
-                      let div = this.announceDOM.appendChild(document.createElement("div"));
-                      div.textContent = effect.value;
-                  }
-      }
-      mountStyles() {
-          this.styleModules = this.state.facet(styleModule);
-          StyleModule.mount(this.root, this.styleModules.concat(baseTheme$1).reverse());
-      }
-      readMeasured() {
-          if (this.updateState == 2 /* UpdateState.Updating */)
-              throw new Error("Reading the editor layout isn't allowed during an update");
-          if (this.updateState == 0 /* UpdateState.Idle */ && this.measureScheduled > -1)
-              this.measure(false);
-      }
-      /**
-      Schedule a layout measurement, optionally providing callbacks to
-      do custom DOM measuring followed by a DOM write phase. Using
-      this is preferable reading DOM layout directly from, for
-      example, an event handler, because it'll make sure measuring and
-      drawing done by other components is synchronized, avoiding
-      unnecessary DOM layout computations.
-      */
-      requestMeasure(request) {
-          if (this.measureScheduled < 0)
-              this.measureScheduled = this.win.requestAnimationFrame(() => this.measure());
-          if (request) {
-              if (request.key != null)
-                  for (let i = 0; i < this.measureRequests.length; i++) {
-                      if (this.measureRequests[i].key === request.key) {
-                          this.measureRequests[i] = request;
-                          return;
-                      }
-                  }
-              this.measureRequests.push(request);
-          }
-      }
-      /**
-      Get the value of a specific plugin, if present. Note that
-      plugins that crash can be dropped from a view, so even when you
-      know you registered a given plugin, it is recommended to check
-      the return value of this method.
-      */
-      plugin(plugin) {
-          let known = this.pluginMap.get(plugin);
-          if (known === undefined || known && known.spec != plugin)
-              this.pluginMap.set(plugin, known = this.plugins.find(p => p.spec == plugin) || null);
-          return known && known.update(this).value;
-      }
-      /**
-      The top position of the document, in screen coordinates. This
-      may be negative when the editor is scrolled down. Points
-      directly to the top of the first line, not above the padding.
-      */
-      get documentTop() {
-          return this.contentDOM.getBoundingClientRect().top + this.viewState.paddingTop;
-      }
-      /**
-      Reports the padding above and below the document.
-      */
-      get documentPadding() {
-          return { top: this.viewState.paddingTop, bottom: this.viewState.paddingBottom };
-      }
-      /**
-      Find the text line or block widget at the given vertical
-      position (which is interpreted as relative to the [top of the
-      document](https://codemirror.net/6/docs/ref/#view.EditorView.documentTop)).
-      */
-      elementAtHeight(height) {
-          this.readMeasured();
-          return this.viewState.elementAtHeight(height);
-      }
-      /**
-      Find the line block (see
-      [`lineBlockAt`](https://codemirror.net/6/docs/ref/#view.EditorView.lineBlockAt) at the given
-      height, again interpreted relative to the [top of the
-      document](https://codemirror.net/6/docs/ref/#view.EditorView.documentTop).
-      */
-      lineBlockAtHeight(height) {
-          this.readMeasured();
-          return this.viewState.lineBlockAtHeight(height);
-      }
-      /**
-      Get the extent and vertical position of all [line
-      blocks](https://codemirror.net/6/docs/ref/#view.EditorView.lineBlockAt) in the viewport. Positions
-      are relative to the [top of the
-      document](https://codemirror.net/6/docs/ref/#view.EditorView.documentTop);
-      */
-      get viewportLineBlocks() {
-          return this.viewState.viewportLines;
-      }
-      /**
-      Find the line block around the given document position. A line
-      block is a range delimited on both sides by either a
-      non-[hidden](https://codemirror.net/6/docs/ref/#view.Decoration^replace) line breaks, or the
-      start/end of the document. It will usually just hold a line of
-      text, but may be broken into multiple textblocks by block
-      widgets.
-      */
-      lineBlockAt(pos) {
-          return this.viewState.lineBlockAt(pos);
-      }
-      /**
-      The editor's total content height.
-      */
-      get contentHeight() {
-          return this.viewState.contentHeight;
-      }
-      /**
-      Move a cursor position by [grapheme
-      cluster](https://codemirror.net/6/docs/ref/#state.findClusterBreak). `forward` determines whether
-      the motion is away from the line start, or towards it. In
-      bidirectional text, the line is traversed in visual order, using
-      the editor's [text direction](https://codemirror.net/6/docs/ref/#view.EditorView.textDirection).
-      When the start position was the last one on the line, the
-      returned position will be across the line break. If there is no
-      further line, the original position is returned.
-      
-      By default, this method moves over a single cluster. The
-      optional `by` argument can be used to move across more. It will
-      be called with the first cluster as argument, and should return
-      a predicate that determines, for each subsequent cluster,
-      whether it should also be moved over.
-      */
-      moveByChar(start, forward, by) {
-          return skipAtoms(this, start, moveByChar(this, start, forward, by));
-      }
-      /**
-      Move a cursor position across the next group of either
-      [letters](https://codemirror.net/6/docs/ref/#state.EditorState.charCategorizer) or non-letter
-      non-whitespace characters.
-      */
-      moveByGroup(start, forward) {
-          return skipAtoms(this, start, moveByChar(this, start, forward, initial => byGroup(this, start.head, initial)));
-      }
-      /**
-      Move to the next line boundary in the given direction. If
-      `includeWrap` is true, line wrapping is on, and there is a
-      further wrap point on the current line, the wrap point will be
-      returned. Otherwise this function will return the start or end
-      of the line.
-      */
-      moveToLineBoundary(start, forward, includeWrap = true) {
-          return moveToLineBoundary(this, start, forward, includeWrap);
-      }
-      /**
-      Move a cursor position vertically. When `distance` isn't given,
-      it defaults to moving to the next line (including wrapped
-      lines). Otherwise, `distance` should provide a positive distance
-      in pixels.
-      
-      When `start` has a
-      [`goalColumn`](https://codemirror.net/6/docs/ref/#state.SelectionRange.goalColumn), the vertical
-      motion will use that as a target horizontal position. Otherwise,
-      the cursor's own horizontal position is used. The returned
-      cursor will have its goal column set to whichever column was
-      used.
-      */
-      moveVertically(start, forward, distance) {
-          return skipAtoms(this, start, moveVertically(this, start, forward, distance));
-      }
-      /**
-      Find the DOM parent node and offset (child offset if `node` is
-      an element, character offset when it is a text node) at the
-      given document position.
-      
-      Note that for positions that aren't currently in
-      `visibleRanges`, the resulting DOM position isn't necessarily
-      meaningful (it may just point before or after a placeholder
-      element).
-      */
-      domAtPos(pos) {
-          return this.docView.domAtPos(pos);
+      domAtPos(pos) {
+          return this.docView.domAtPos(pos);
       }
       /**
       Find the document position at the given DOM node. Can be useful
@@ -27848,7 +26843,7 @@
           this.dom.remove();
           this.observer.destroy();
           if (this.measureScheduled > -1)
-              cancelAnimationFrame(this.measureScheduled);
+              this.win.cancelAnimationFrame(this.measureScheduled);
           this.destroyed = true;
       }
       /**
@@ -27937,6 +26932,11 @@
   */
   EditorView.inputHandler = inputHandler;
   /**
+  This facet can be used to provide functions that create effects
+  to be dispatched when the editor's focus state changes.
+  */
+  EditorView.focusChangeEffect = focusChangeEffect;
+  /**
   By default, the editor assumes all its content has the same
   [text direction](https://codemirror.net/6/docs/ref/#view.Direction). Configure this with a `true`
   value to make it read the text direction of every (rendered)
@@ -28158,6 +27158,7 @@
           });
       }
   });
+  const knownHeight = /*@__PURE__*/new WeakMap();
   const tooltipPlugin = /*@__PURE__*/ViewPlugin.fromClass(class {
       constructor(view) {
           this.view = view;
@@ -28273,6 +27274,7 @@
           };
       }
       writeMeasure(measured) {
+          var _a;
           let { editor, space } = measured;
           let others = [];
           for (let i = 0; i < this.manager.tooltips.length; i++) {
@@ -28287,12 +27289,12 @@
                   continue;
               }
               let arrow = tooltip.arrow ? tView.dom.querySelector(".cm-tooltip-arrow") : null;
-              let arrowHeight = arrow ? 7 /* Arrow.Size */ : 0;
-              let width = size.right - size.left, height = size.bottom - size.top;
+              let arrowHeight = arrow ? 7 /* Size */ : 0;
+              let width = size.right - size.left, height = (_a = knownHeight.get(tView)) !== null && _a !== void 0 ? _a : size.bottom - size.top;
               let offset = tView.offset || noOffset, ltr = this.view.textDirection == Direction.LTR;
               let left = size.width > space.right - space.left ? (ltr ? space.left : space.right - size.width)
-                  : ltr ? Math.min(pos.left - (arrow ? 14 /* Arrow.Offset */ : 0) + offset.x, space.right - width)
-                      : Math.max(space.left, pos.left - width + (arrow ? 14 /* Arrow.Offset */ : 0) - offset.x);
+                  : ltr ? Math.min(pos.left - (arrow ? 14 /* Offset */ : 0) + offset.x, space.right - width)
+                      : Math.max(space.left, pos.left - width + (arrow ? 14 /* Offset */ : 0) - offset.x);
               let above = !!tooltip.above;
               if (!tooltip.strictSide && (above
                   ? pos.top - (size.bottom - size.top) - offset.y < space.top
@@ -28305,6 +27307,7 @@
                       dom.style.top = Outside;
                       continue;
                   }
+                  knownHeight.set(tView, height);
                   dom.style.height = (height = spaceVert) + "px";
               }
               else if (dom.style.height) {
@@ -28325,7 +27328,7 @@
                   dom.style.left = left + "px";
               }
               if (arrow)
-                  arrow.style.left = `${pos.left + (ltr ? offset.x : -offset.x) - (left + 14 /* Arrow.Offset */ - 7 /* Arrow.Size */)}px`;
+                  arrow.style.left = `${pos.left + (ltr ? offset.x : -offset.x) - (left + 14 /* Offset */ - 7 /* Size */)}px`;
               if (tView.overlap !== true)
                   others.push({ left, top, right, bottom: top + height });
               dom.classList.toggle("cm-tooltip-above", above);
@@ -28368,8 +27371,8 @@
           color: "white"
       },
       ".cm-tooltip-arrow": {
-          height: `${7 /* Arrow.Size */}px`,
-          width: `${7 /* Arrow.Size */ * 2}px`,
+          height: `${7 /* Size */}px`,
+          width: `${7 /* Size */ * 2}px`,
           position: "absolute",
           zIndex: -1,
           overflow: "hidden",
@@ -28378,26 +27381,26 @@
               position: "absolute",
               width: 0,
               height: 0,
-              borderLeft: `${7 /* Arrow.Size */}px solid transparent`,
-              borderRight: `${7 /* Arrow.Size */}px solid transparent`,
+              borderLeft: `${7 /* Size */}px solid transparent`,
+              borderRight: `${7 /* Size */}px solid transparent`,
           },
           ".cm-tooltip-above &": {
-              bottom: `-${7 /* Arrow.Size */}px`,
+              bottom: `-${7 /* Size */}px`,
               "&:before": {
-                  borderTop: `${7 /* Arrow.Size */}px solid #bbb`,
+                  borderTop: `${7 /* Size */}px solid #bbb`,
               },
               "&:after": {
-                  borderTop: `${7 /* Arrow.Size */}px solid #f5f5f5`,
+                  borderTop: `${7 /* Size */}px solid #f5f5f5`,
                   bottom: "1px"
               }
           },
           ".cm-tooltip-below &": {
-              top: `-${7 /* Arrow.Size */}px`,
+              top: `-${7 /* Size */}px`,
               "&:before": {
-                  borderBottom: `${7 /* Arrow.Size */}px solid #bbb`,
+                  borderBottom: `${7 /* Size */}px solid #bbb`,
               },
               "&:after": {
-                  borderBottom: `${7 /* Arrow.Size */}px solid #f5f5f5`,
+                  borderBottom: `${7 /* Size */}px solid #f5f5f5`,
                   top: "1px"
               }
           },
@@ -28457,6 +27460,11 @@
       update(update) {
           this.manager.update(update);
       }
+      destroy() {
+          var _a;
+          for (let t of this.manager.tooltipViews)
+              (_a = t.destroy) === null || _a === void 0 ? void 0 : _a.call(t);
+      }
   }
   const showHoverTooltipHost = /*@__PURE__*/showTooltip.compute([showHoverTooltip], state => {
       let tooltips = state.facet(showHoverTooltip).filter(t => t);
@@ -28542,7 +27550,7 @@
           if (tooltip && !isInTooltip(this.lastMove.target) || this.pending) {
               let { pos } = tooltip || this.pending, end = (_a = tooltip === null || tooltip === void 0 ? void 0 : tooltip.end) !== null && _a !== void 0 ? _a : pos;
               if ((pos == end ? this.view.posAtCoords(this.lastMove) != pos
-                  : !isOverRange(this.view, pos, end, event.clientX, event.clientY, 6 /* Hover.MaxDist */))) {
+                  : !isOverRange(this.view, pos, end, event.clientX, event.clientY, 6 /* MaxDist */))) {
                   this.view.dispatch({ effects: this.setHover.of(null) });
                   this.pending = null;
               }
@@ -28624,7 +27632,7 @@
       });
       return [
           hoverState,
-          ViewPlugin.define(view => new HoverPlugin(view, source, hoverState, setHover, options.hoverTime || 300 /* Hover.Time */)),
+          ViewPlugin.define(view => new HoverPlugin(view, source, hoverState, setHover, options.hoverTime || 300 /* Time */)),
           showHoverTooltipHost
       ];
   }
@@ -28824,6 +27832,11 @@
   */
   const languageDataProp = /*@__PURE__*/new NodeProp();
   /**
+  Syntax node prop used to register sublanguages. Should be added to
+  the top level node type for the language.
+  */
+  const sublanguageProp = /*@__PURE__*/new NodeProp();
+  /**
   A language object manages parsing and per-language
   [metadata](https://codemirror.net/6/docs/ref/#state.EditorState.languageDataAt). Parse data is
   managed as a [Lezer](https://lezer.codemirror.net) tree. The class
@@ -28860,14 +27873,28 @@
           this.parser = parser;
           this.extension = [
               language.of(this),
-              EditorState.languageData.of((state, pos, side) => state.facet(languageDataFacetAt(state, pos, side)))
+              EditorState.languageData.of((state, pos, side) => {
+                  let top = topNodeAt(state, pos, side), data = top.type.prop(languageDataProp);
+                  if (!data)
+                      return [];
+                  let base = state.facet(data), sub = top.type.prop(sublanguageProp);
+                  if (sub) {
+                      let innerNode = top.resolve(pos - top.from, side);
+                      for (let sublang of sub)
+                          if (sublang.test(innerNode, state)) {
+                              let data = state.facet(sublang.facet);
+                              return sublang.type == "replace" ? data : data.concat(base);
+                          }
+                  }
+                  return base;
+              })
           ].concat(extraExtensions);
       }
       /**
       Query whether this language is active at the given position.
       */
       isActiveAt(state, pos, side = -1) {
-          return languageDataFacetAt(state, pos, side) == this.data;
+          return topNodeAt(state, pos, side).type.prop(languageDataProp) == this.data;
       }
       /**
       Find the document regions that were parsed using this language.
@@ -28922,16 +27949,14 @@
   @internal
   */
   Language.setState = /*@__PURE__*/StateEffect.define();
-  function languageDataFacetAt(state, pos, side) {
-      let topLang = state.facet(language);
-      if (!topLang)
-          return null;
-      let facet = topLang.data;
-      if (topLang.allowsNesting) {
-          for (let node = syntaxTree(state).topNode; node; node = node.enter(pos, side, IterMode.ExcludeBuffers))
-              facet = node.type.prop(languageDataProp) || facet;
+  function topNodeAt(state, pos, side) {
+      let topLang = state.facet(language), tree = syntaxTree(state).topNode;
+      if (!topLang || topLang.allowsNesting) {
+          for (let node = tree; node; node = node.enter(pos, side, IterMode.ExcludeBuffers))
+              if (node.type.isTop)
+                  tree = node;
       }
-      return facet;
+      return tree;
   }
   /**
   Get the syntax tree for a state, which is the current (possibly
@@ -28943,15 +27968,22 @@
       let field = state.field(Language.state, false);
       return field ? field.tree : Tree.empty;
   }
-  // Lezer-style Input object for a Text document.
+  /**
+  Lezer-style
+  [`Input`](https://lezer.codemirror.net/docs/ref#common.Input)
+  object for a [`Text`](https://codemirror.net/6/docs/ref/#state.Text) object.
+  */
   class DocInput {
-      constructor(doc, length = doc.length) {
+      /**
+      Create an input object for the given document.
+      */
+      constructor(doc) {
           this.doc = doc;
-          this.length = length;
           this.cursorPos = 0;
           this.string = "";
           this.cursor = doc.iter();
       }
+      get length() { return this.doc.length; }
       syncTo(pos) {
           this.string = this.cursor.next(pos - this.cursorPos).value;
           this.cursorPos = pos + this.string.length;
@@ -29230,14 +28262,14 @@
           // state updates with parse work beyond the viewport.
           let upto = this.context.treeLen == tr.startState.doc.length ? undefined
               : Math.max(tr.changes.mapPos(this.context.treeLen), newCx.viewport.to);
-          if (!newCx.work(20 /* Work.Apply */, upto))
+          if (!newCx.work(20 /* Apply */, upto))
               newCx.takeTree();
           return new LanguageState(newCx);
       }
       static init(state) {
-          let vpTo = Math.min(3000 /* Work.InitViewport */, state.doc.length);
+          let vpTo = Math.min(3000 /* InitViewport */, state.doc.length);
           let parseState = ParseContext.create(state.facet(language).parser, state, { from: 0, to: vpTo });
-          if (!parseState.work(20 /* Work.Apply */, vpTo))
+          if (!parseState.work(20 /* Apply */, vpTo))
               parseState.takeTree();
           return new LanguageState(parseState);
       }
@@ -29254,14 +28286,14 @@
       }
   });
   let requestIdle = (callback) => {
-      let timeout = setTimeout(() => callback(), 500 /* Work.MaxPause */);
+      let timeout = setTimeout(() => callback(), 500 /* MaxPause */);
       return () => clearTimeout(timeout);
   };
   if (typeof requestIdleCallback != "undefined")
       requestIdle = (callback) => {
           let idle = -1, timeout = setTimeout(() => {
-              idle = requestIdleCallback(callback, { timeout: 500 /* Work.MaxPause */ - 100 /* Work.MinPause */ });
-          }, 100 /* Work.MinPause */);
+              idle = requestIdleCallback(callback, { timeout: 500 /* MaxPause */ - 100 /* MinPause */ });
+          }, 100 /* MinPause */);
           return () => idle < 0 ? clearTimeout(timeout) : cancelIdleCallback(idle);
       };
   const isInputPending = typeof navigator != "undefined" && ((_a = navigator.scheduling) === null || _a === void 0 ? void 0 : _a.isInputPending)
@@ -29284,7 +28316,7 @@
               this.scheduleWork();
           if (update.docChanged) {
               if (this.view.hasFocus)
-                  this.chunkBudget += 50 /* Work.ChangeBonus */;
+                  this.chunkBudget += 50 /* ChangeBonus */;
               this.scheduleWork();
           }
           this.checkAsyncSchedule(cx);
@@ -29300,19 +28332,19 @@
           this.working = null;
           let now = Date.now();
           if (this.chunkEnd < now && (this.chunkEnd < 0 || this.view.hasFocus)) { // Start a new chunk
-              this.chunkEnd = now + 30000 /* Work.ChunkTime */;
-              this.chunkBudget = 3000 /* Work.ChunkBudget */;
+              this.chunkEnd = now + 30000 /* ChunkTime */;
+              this.chunkBudget = 3000 /* ChunkBudget */;
           }
           if (this.chunkBudget <= 0)
               return; // No more budget
           let { state, viewport: { to: vpTo } } = this.view, field = state.field(Language.state);
-          if (field.tree == field.context.tree && field.context.isDone(vpTo + 100000 /* Work.MaxParseAhead */))
+          if (field.tree == field.context.tree && field.context.isDone(vpTo + 100000 /* MaxParseAhead */))
               return;
-          let endTime = Date.now() + Math.min(this.chunkBudget, 100 /* Work.Slice */, deadline && !isInputPending ? Math.max(25 /* Work.MinSlice */, deadline.timeRemaining() - 5) : 1e9);
+          let endTime = Date.now() + Math.min(this.chunkBudget, 100 /* Slice */, deadline && !isInputPending ? Math.max(25 /* MinSlice */, deadline.timeRemaining() - 5) : 1e9);
           let viewportFirst = field.context.treeLen < vpTo && state.doc.length > vpTo + 1000;
           let done = field.context.work(() => {
               return isInputPending && isInputPending() || Date.now() > endTime;
-          }, vpTo + (viewportFirst ? 0 : 100000 /* Work.MaxParseAhead */));
+          }, vpTo + (viewportFirst ? 0 : 100000 /* MaxParseAhead */));
           this.chunkBudget -= Date.now() - now;
           if (done || this.chunkBudget <= 0) {
               field.context.takeTree();
@@ -29478,7 +28510,7 @@
   */
   /*@__PURE__*/HighlightStyle.define([
       { tag: tags.meta,
-          color: "#7a757a" },
+          color: "#404740" },
       { tag: tags.link,
           textDecoration: "underline" },
       { tag: tags.heading,
@@ -29628,7 +28660,7 @@
                       diagnostic: d
                   }).range(d.from)
                   : Decoration.mark({
-                      attributes: { class: "cm-lintRange cm-lintRange-" + d.severity },
+                      attributes: { class: "cm-lintRange cm-lintRange-" + d.severity + (d.markClass ? " " + d.markClass : "") },
                       diagnostic: d
                   }).range(d.from, d.to);
           }), true);
@@ -29646,20 +28678,11 @@
       return found;
   }
   function hideTooltip(tr, tooltip) {
-      return !!(tr.effects.some(e => e.is(setDiagnosticsEffect)) || tr.changes.touchesRange(tooltip.pos));
+      let line = tr.startState.doc.lineAt(tooltip.pos);
+      return !!(tr.effects.some(e => e.is(setDiagnosticsEffect)) || tr.changes.touchesRange(line.from, line.to));
   }
   function maybeEnableLint(state, effects) {
-      return state.field(lintState, false) ? effects : effects.concat(StateEffect.appendConfig.of([
-          lintState,
-          EditorView.decorations.compute([lintState], state => {
-              let { selected, panel } = state.field(lintState);
-              return !selected || !panel || selected.from == selected.to ? Decoration.none : Decoration.set([
-                  activeMark.range(selected.from, selected.to)
-              ]);
-          }),
-          hoverTooltip(lintTooltip, { hideOn: hideTooltip }),
-          baseTheme
-      ]));
+      return state.field(lintState, false) ? effects : effects.concat(StateEffect.appendConfig.of(lintExtensions));
   }
   /**
   Returns a transaction spec which updates the current set of
@@ -29773,7 +28796,8 @@
       }
       update(update) {
           let config = update.state.facet(lintConfig);
-          if (update.docChanged || config != update.startState.facet(lintConfig)) {
+          if (update.docChanged || config != update.startState.facet(lintConfig) ||
+              config.needsRefresh && config.needsRefresh(update)) {
               this.lintTime = Date.now() + config.delay;
               if (!this.set) {
                   this.set = true;
@@ -29796,10 +28820,12 @@
           return Object.assign({ sources: input.map(i => i.source) }, combineConfig(input.map(i => i.config), {
               delay: 750,
               markerFilter: null,
-              tooltipFilter: null
+              tooltipFilter: null,
+              needsRefresh: null
+          }, {
+              needsRefresh: (a, b) => !a ? b : !b ? a : u => a(u) || b(u)
           }));
-      },
-      enables: lintPlugin
+      }
   });
   /**
   Given a diagnostic source, this function returns an extension that
@@ -29807,7 +28833,11 @@
   editor is idle (after its content changed).
   */
   function linter(source, config = {}) {
-      return lintConfig.of({ source, config });
+      return [
+          lintConfig.of({ source, config }),
+          lintPlugin,
+          lintExtensions
+      ];
   }
   function assignKeys(actions) {
       let assigned = [];
@@ -29828,8 +28858,11 @@
       var _a;
       let keys = inPanel ? assignKeys(diagnostic.actions) : [];
       return crelt("li", { class: "cm-diagnostic cm-diagnostic-" + diagnostic.severity }, crelt("span", { class: "cm-diagnosticText" }, diagnostic.renderMessage ? diagnostic.renderMessage() : diagnostic.message), (_a = diagnostic.actions) === null || _a === void 0 ? void 0 : _a.map((action, i) => {
-          let click = (e) => {
+          let fired = false, click = (e) => {
               e.preventDefault();
+              if (fired)
+                  return;
+              fired = true;
               let found = findDiagnostic(view.state.field(lintState).diagnostics, diagnostic);
               if (found)
                   action.apply(view, found.from, found.to);
@@ -30049,6 +29082,7 @@
       ".cm-diagnostic-error": { borderLeft: "5px solid #d11" },
       ".cm-diagnostic-warning": { borderLeft: "5px solid orange" },
       ".cm-diagnostic-info": { borderLeft: "5px solid #999" },
+      ".cm-diagnostic-hint": { borderLeft: "5px solid #66d" },
       ".cm-diagnosticAction": {
           font: "inherit",
           border: "none",
@@ -30056,7 +29090,8 @@
           backgroundColor: "#444",
           color: "white",
           borderRadius: "3px",
-          marginLeft: "8px"
+          marginLeft: "8px",
+          cursor: "pointer"
       },
       ".cm-diagnosticSource": {
           fontSize: "70%",
@@ -30070,6 +29105,7 @@
       ".cm-lintRange-error": { backgroundImage: /*@__PURE__*/underline("#d11") },
       ".cm-lintRange-warning": { backgroundImage: /*@__PURE__*/underline("orange") },
       ".cm-lintRange-info": { backgroundImage: /*@__PURE__*/underline("#999") },
+      ".cm-lintRange-hint": { backgroundImage: /*@__PURE__*/underline("#66d") },
       ".cm-lintRange-active": { backgroundColor: "#ffdd9980" },
       ".cm-tooltip-lint": {
           padding: 0,
@@ -30093,6 +29129,9 @@
       ".cm-lintPoint-info": {
           "&:after": { borderBottomColor: "#999" }
       },
+      ".cm-lintPoint-hint": {
+          "&:after": { borderBottomColor: "#66d" }
+      },
       ".cm-panel.cm-panel-lint": {
           position: "relative",
           "& ul": {
@@ -30124,6 +29163,17 @@
           }
       }
   });
+  const lintExtensions = [
+      lintState,
+      /*@__PURE__*/EditorView.decorations.compute([lintState], state => {
+          let { selected, panel } = state.field(lintState);
+          return !selected || !panel || selected.from == selected.to ? Decoration.none : Decoration.set([
+              activeMark.range(selected.from, selected.to)
+          ]);
+      }),
+      /*@__PURE__*/hoverTooltip(lintTooltip, { hideOn: hideTooltip }),
+      baseTheme
+  ];
 
   class CompositeBlock {
       constructor(type, 
@@ -32140,365 +31190,365 @@
     }));
   };
 
-  syntaxHighlighting(HighlightStyle.define([
-    { tag: tags.strong, fontWeight: 'bold' },
-    { tag: tags.emphasis, fontStyle: 'italic' },
-  ]));
-
-  EditorView.theme({
-    '& .cm-lintRange': {
-      position: 'relative',
-    },
-    '& .cm-lintRange::after': {
-      content: '""',
-      width: '100%',
-      position: 'absolute',
-      left: '0px',
-      bottom: '-2px',
-      height: '3px',
-      backgroundRepeat: 'repeat-x',
-    },
-    '& .cm-lintRange.cm-lintRange-warning, & .cm-lintRange.cm-lintRange-error': {
-      backgroundImage: 'none',
-    },
-    '& .cm-lintPoint::after': {
-      bottom: '-2px'
-    }
-  });
-
-  const _urlify = (color) => `%23${color.slice(1)}`;
-
-  const colors = {
-    black: '#1f2b36',
-    darkGrey: '#2f3d58',
-    grey: '#404a5c',
-    midGrey: '#576071',
-    lightGrey: '#c5d1e5',
-    offWhite: '#d9e0f5',
-    snowWhite: '#eaf1ff',
-    white: '#ffffff',
-    mossGreen: '#7ab6aa',
-    iceBlue: '#6cbfd8',
-    waterBlue: '#065aaa',
-    brightBlue: '#0a56b9',
-    deepBlue: '#355472',
-    red: '#9f1c15',
-    orangeBrown: '#b4502f',
-    yellow: '#debd71',
-    lila: '#9a4890',
-    purple: '#5b2c83'
-  };
-
-  const colorByRole = {
-    lightBackground: colors.white,
-    darkBackground: colors.snowWhite,
-    selection: colors.snowWhite,
-    tooltipBackground: colors.offWhite,
-    error: colors.red,
-    warning: colors.yellow,
-    invalid: '#b40000'
-  };
-
-  EditorView.theme(
-    {
-      '&': { color: colors.black, backgroundColor: colorByRole.lightBackground },
-      '.cm-content': { caretColor: colors.darkGrey },
-      '.cm-cursor, .cm-dropCursor': { borderLeftColor: colors.darkGrey },
-      '&.cm-focused .cm-selectionBackground, .cm-selectionBackground, .cm-content ::selection':
-        { backgroundColor: colorByRole.selection },
-
-      '.cm-panels': { backgroundColor: colorByRole.darkBackground, color: colors.grey },
-      '.cm-panels.cm-panels-top': { borderBottom: `2px solid ${ colors.black }` },
-      '.cm-panels.cm-panels-bottom': { borderTop: `2px solid ${ colors.black }` },
-
-      '.cm-searchMatch': {
-        backgroundColor: '#72a1ff59',
-        outline: `1px solid ${colors.midGrey}`
-      },
-      '.cm-searchMatch.cm-searchMatch-selected': { backgroundColor: colors.offWhite },
-      '.cm-activeLine': { backgroundColor: colorByRole.selection },
-      '.cm-selectionMatch': { backgroundColor: colors.offWhite },
-
-      '&.cm-focused .cm-matchingBracket, &.cm-focused .cm-nonmatchingBracket': {
-        outline: `1px solid ${colors.grey}`
-      },
-
-      '&.cm-focused .cm-matchingBracket': {
-        backgroundColor: colors.snowWhite
-      },
-
-      '.cm-gutters': {
-        backgroundColor: '#f3f7fe',
-        color: '#52668d',
-        border: 'none',
-        padding: '0 5px'
-      },
-
-      '.cm-activeLineGutter': {
-        backgroundColor: colorByRole.selection
-      },
-
-      '.cm-foldPlaceholder': {
-        backgroundColor: 'transparent',
-        border: 'none',
-        color: '#ddd'
-      },
-
-      '.cm-tooltip': {
-        border: 'none',
-        backgroundColor: colorByRole.tooltipBackground
-      },
-      '.cm-tooltip .cm-tooltip-arrow:before': {
-        borderTopColor: 'transparent',
-        borderBottomColor: 'transparent'
-      },
-      '.cm-tooltip .cm-tooltip-arrow:after': {
-        borderTopColor: colorByRole.tooltipBackground,
-        borderBottomColor: colorByRole.tooltipBackground
-      },
-      '.cm-tooltip-autocomplete': {
-        '& > ul > li[aria-selected]': {
-          backgroundColor: colorByRole.darkBackground,
-          color: colors.midGrey
-        }
-      },
-      '& .cm-lintRange.cm-lintRange-warning::after': {
-        backgroundImage: `url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='6' height='3'><path d='m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0' stroke='${_urlify(colorByRole.warning)}' fill='none' stroke-width='1.2'/></svg>")`,
-      },
-      '& .cm-lintRange.cm-lintRange-error::after': {
-        backgroundImage: `url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='6' height='3'><path d='m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0' stroke='${_urlify(colorByRole.error)}' fill='none' stroke-width='1.2'/></svg>")`,
-      },
-      '& .cm-diagnostic-warning': {
-        border: `1px solid ${colorByRole.warning}`,
-        borderLeft: `5px solid ${colorByRole.warning}`,
-        background: colorByRole.lightBackground,
-      },
-      '& .cm-diagnostic-error': {
-        border: `1px solid ${colorByRole.error}`,
-        borderLeft: `5px solid ${colorByRole.error}`,
-        background: colorByRole.lightBackground
-      },
-      '& .cm-diagnostic': {
-        padding: '3px 8px'
-      }
-    },
-    { dark: false }
-  );
-
-  syntaxHighlighting(HighlightStyle.define([
-    {
-      tag: [ tags.macroName, tags.variableName ],
-      color: colors.waterBlue
-    },
-    {
-      tag: [ tags.special(tags.bracket) ],
-      color: colors.waterBlue,
-      fontWeight: 'bold'
-    },
-    {
-      tag: [ tags.color, tags.name, tags.definition(tags.name), tags.constant(tags.name), tags.standard(tags.name), tags.propertyName, ],
-      color: colors.deepBlue
-    },
-    {
-      tag: [ tags.definition(tags.variableName), tags.function(tags.variableName), tags.function(tags.propertyName) ],
-      color: colors.brightBlue,
-    },
-    { tag: [ tags.labelName ], color: colors.orangeBrown },
-    {
-      tag: [ tags.annotation ],
-      color: colorByRole.invalid
-    },
-    {
-      tag: [ tags.number, tags.changed, tags.annotation, tags.modifier, tags.self, tags.namespace, tags.atom, tags.bool, tags.special(tags.variableName) ],
-      color: colors.red
-    },
-    {
-      tag: [ tags.typeName, tags.className, tags.attributeName ],
-      color: colors.lila
-    },
-    {
-      tag: [ tags.operator, tags.operatorKeyword, tags.tagName, tags.keyword ],
-      color: colors.purple
-    },
-    {
-      tag: [ tags.angleBracket, tags.squareBracket, tags.brace, tags.separator, tags.punctuation ],
-      color: colors.midGrey
-    },
-    {
-      tag: [ tags.regexp ],
-      color: colors.deepBlue
-    },
-    {
-      tag: [ tags.quote ],
-      color: colors.darkGrey
-    },
-    { tag: [ tags.string, tags.character, tags.deleted ], color: colors.orangeBrown },
-    {
-      tag: tags.link,
-      color: colors.mossGreen,
-      textDecoration: 'underline',
-      textUnderlinePosition: 'under'
-    },
-    {
-      tag: [ tags.url, tags.escape, tags.special(tags.string) ],
-      color: colors.red
-    },
-    { tag: [ tags.meta ], color: colors.iceBlue },
-    { tag: [ tags.comment ], color: colors.midGrey, fontStyle: 'italic' },
-    { tag: tags.strong, fontWeight: 'bold', color: colors.deepBlue },
-    { tag: tags.emphasis, fontStyle: 'italic', color: colors.deepBlue },
-    { tag: tags.strikethrough, textDecoration: 'line-through' },
-    { tag: tags.heading, fontWeight: 'bold', color: colors.midGray },
-    { tag: tags.special(tags.heading1), fontWeight: 'bold', color: colors.darkGrey },
-    {
-      tag: [ tags.heading1, tags.heading2, tags.heading3, tags.heading4 ],
-      fontWeight: 'bold',
-      color: colors.midGrey
-    },
-    { tag: [ tags.heading5, tags.heading6, tags.processingInstruction, tags.inserted ], color: colors.grey },
-    {
-      tag: [ tags.contentSeparator ],
-      color: colors.yellow
-    },
-    { tag: tags.invalid, color: colors.midGrey, borderBottom: `1px dotted ${colorByRole.invalid}` }
-  ]));
-
-  const ivory = '#abb2bf',
-        peach = '#f07178',
-        stone = '#7d8799',
-        invalid = '#ffffff',
-        pastelYellow = '#fffce1',
-        pastelOrange = '#ec9e6f',
-        raisinBlack = '#21252b',
-        highlightBackground = 'rgba(0, 0, 0, 0.5)',
-        background = '#292d3e',
-        tooltipBackground = '#353a42',
-        selection = 'rgba(128, 203, 196, 0.2)',
-        cursor = '#ffcc00';
-
-  const urlHash = '%23';
-  const warningColorHex = 'fff890';
-  const errorColor = 'red';
-  const warningBackgroundColor = '#281e16';
-  const errorBackgroundColor = '#281616';
-
-  EditorView.theme(
-    {
-      '&': {
-        color: '#ffffff',
-        backgroundColor: background
-      },
-      '.cm-content': {
-        caretColor: cursor
-      },
-      '&.cm-focused .cm-cursor': {
-        borderLeftColor: cursor
-      },
-      '&.cm-focused .cm-selectionBackground, .cm-selectionBackground, .cm-content ::selection':
-        { backgroundColor: selection },
-      '.cm-panels': { backgroundColor: raisinBlack, color: '#ffffff' },
-      '.cm-panels.cm-panels-top': { borderBottom: '2px solid black' },
-      '.cm-panels.cm-panels-bottom': { borderTop: '2px solid black' },
-      '.cm-searchMatch': {
-        backgroundColor: '#72a1ff59',
-        outline: '1px solid #457dff'
-      },
-      '.cm-searchMatch.cm-searchMatch-selected': {
-        backgroundColor: '#6199ff2f'
-      },
-      '.cm-activeLine': { backgroundColor: highlightBackground },
-      '.cm-selectionMatch': { backgroundColor: '#aafe661a' },
-      '&.cm-focused .cm-matchingBracket, &.cm-focused .cm-nonmatchingBracket': {
-        backgroundColor: '#bad0f847',
-        outline: '1px solid #515a6b'
-      },
-      '.cm-gutters': {
-        background: '#292d3e',
-        color: '#676e95',
-        border: 'none',
-        padding: '0 5px'
-      },
-      '.cm-activeLineGutter': {
-        backgroundColor: highlightBackground
-      },
-      '.cm-foldPlaceholder': {
-        backgroundColor: 'transparent',
-        border: 'none',
-        color: '#ddd'
-      },
-      '.cm-tooltip': {
-        border: 'none',
-        backgroundColor: tooltipBackground
-      },
-      '.cm-tooltip .cm-tooltip-arrow:before': {
-        borderTopColor: 'transparent',
-        borderBottomColor: 'transparent'
-      },
-      '.cm-tooltip .cm-tooltip-arrow:after': {
-        borderTopColor: tooltipBackground,
-        borderBottomColor: tooltipBackground
-      },
-      '.cm-tooltip-autocomplete': {
-        '& > ul > li[aria-selected]': {
-          backgroundColor: highlightBackground,
-          color: ivory
-        }
-      },
-      '& .cm-lintRange.cm-lintRange-warning::after': {
-        backgroundImage: `url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='6' height='3'><path d='m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0' stroke='${urlHash + warningColorHex}' fill='none' stroke-width='1.2'/></svg>")`,
-      },
-      '& .cm-lintRange.cm-lintRange-error::after': {
-        backgroundImage: `url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='6' height='3'><path d='m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0' stroke='${errorColor}' fill='none' stroke-width='1.2'/></svg>")`,
-      },
-      '& .cm-diagnostic-warning': {
-        borderLeft: `5px solid #${warningColorHex}`,
-        background: warningBackgroundColor
-      },
-      '& .cm-diagnostic-error': {
-        borderLeft: `5px solid ${errorColor}`,
-        background: errorBackgroundColor
-      },
-      '& .cm-diagnostic': {
-        borderRadius: '2px',
-        padding: '3px 8px'
-      }
-    },
-    { dark: true }
-  );
-
-  syntaxHighlighting(HighlightStyle.define([
-
-    // Markdown headings
-    { tag: tags.heading1, color: pastelYellow },
-    { tag: tags.heading2, color: pastelYellow },
-    { tag: tags.heading3, color: pastelYellow },
-    { tag: tags.heading4, color: pastelYellow },
-    { tag: tags.heading5, color: pastelYellow },
-    { tag: tags.heading6, color: pastelYellow },
-
-    // Feelers
-    { tag: tags.special(tags.bracket), color: pastelOrange, fontWeight: 'bold' },
-
-    // Everything else
-    { tag: tags.keyword, color: '#c792ea' },
-    { tag: tags.operator, color: '#89ddff' },
-    { tag: tags.special(tags.variableName), color: '#eeffff' },
-    { tag: tags.typeName, color: '#f07178' },
-    { tag: tags.atom, color: '#f78c6c' },
-    { tag: tags.number, color: '#ff5370' },
-    { tag: tags.bool, color: '#ff5370' },
-    { tag: tags.definition(tags.variableName), color: '#82aaff' },
-    { tag: tags.string, color: '#c3e88d' },
-    { tag: tags.comment, color: stone },
-    { tag: tags.tagName, color: '#ff5370' },
-    { tag: tags.bracket, color: '#a2a1a4' },
-    { tag: tags.meta, color: '#ffcb6b' },
-    { tag: tags.special(tags.string), color: peach },
-    { tag: tags.propertyName, color: pastelOrange },
-    { tag: tags.variableName, color: pastelOrange },
-    { tag: tags.attributeName, color: peach },
-    { tag: tags.className, color: peach },
-    { tag: tags.invalid, color: invalid }
+  syntaxHighlighting(HighlightStyle.define([
+    { tag: tags.strong, fontWeight: 'bold' },
+    { tag: tags.emphasis, fontStyle: 'italic' },
+  ]));
+
+  EditorView.theme({
+    '& .cm-lintRange': {
+      position: 'relative',
+    },
+    '& .cm-lintRange::after': {
+      content: '""',
+      width: '100%',
+      position: 'absolute',
+      left: '0px',
+      bottom: '-2px',
+      height: '3px',
+      backgroundRepeat: 'repeat-x',
+    },
+    '& .cm-lintRange.cm-lintRange-warning, & .cm-lintRange.cm-lintRange-error': {
+      backgroundImage: 'none',
+    },
+    '& .cm-lintPoint::after': {
+      bottom: '-2px'
+    }
+  });
+
+  const _urlify = (color) => `%23${color.slice(1)}`;
+
+  const colors = {
+    black: '#1f2b36',
+    darkGrey: '#2f3d58',
+    grey: '#404a5c',
+    midGrey: '#576071',
+    lightGrey: '#c5d1e5',
+    offWhite: '#d9e0f5',
+    snowWhite: '#eaf1ff',
+    white: '#ffffff',
+    mossGreen: '#7ab6aa',
+    iceBlue: '#6cbfd8',
+    waterBlue: '#065aaa',
+    brightBlue: '#0a56b9',
+    deepBlue: '#355472',
+    red: '#9f1c15',
+    orangeBrown: '#b4502f',
+    yellow: '#debd71',
+    lila: '#9a4890',
+    purple: '#5b2c83'
+  };
+
+  const colorByRole = {
+    lightBackground: colors.white,
+    darkBackground: colors.snowWhite,
+    selection: colors.snowWhite,
+    tooltipBackground: colors.offWhite,
+    error: colors.red,
+    warning: colors.yellow,
+    invalid: '#b40000'
+  };
+
+  EditorView.theme(
+    {
+      '&': { color: colors.black, backgroundColor: colorByRole.lightBackground },
+      '.cm-content': { caretColor: colors.darkGrey },
+      '.cm-cursor, .cm-dropCursor': { borderLeftColor: colors.darkGrey },
+      '&.cm-focused .cm-selectionBackground, .cm-selectionBackground, .cm-content ::selection':
+        { backgroundColor: colorByRole.selection },
+
+      '.cm-panels': { backgroundColor: colorByRole.darkBackground, color: colors.grey },
+      '.cm-panels.cm-panels-top': { borderBottom: `2px solid ${ colors.black }` },
+      '.cm-panels.cm-panels-bottom': { borderTop: `2px solid ${ colors.black }` },
+
+      '.cm-searchMatch': {
+        backgroundColor: '#72a1ff59',
+        outline: `1px solid ${colors.midGrey}`
+      },
+      '.cm-searchMatch.cm-searchMatch-selected': { backgroundColor: colors.offWhite },
+      '.cm-activeLine': { backgroundColor: colorByRole.selection },
+      '.cm-selectionMatch': { backgroundColor: colors.offWhite },
+
+      '&.cm-focused .cm-matchingBracket, &.cm-focused .cm-nonmatchingBracket': {
+        outline: `1px solid ${colors.grey}`
+      },
+
+      '&.cm-focused .cm-matchingBracket': {
+        backgroundColor: colors.snowWhite
+      },
+
+      '.cm-gutters': {
+        backgroundColor: '#f3f7fe',
+        color: '#52668d',
+        border: 'none',
+        padding: '0 5px'
+      },
+
+      '.cm-activeLineGutter': {
+        backgroundColor: colorByRole.selection
+      },
+
+      '.cm-foldPlaceholder': {
+        backgroundColor: 'transparent',
+        border: 'none',
+        color: '#ddd'
+      },
+
+      '.cm-tooltip': {
+        border: 'none',
+        backgroundColor: colorByRole.tooltipBackground
+      },
+      '.cm-tooltip .cm-tooltip-arrow:before': {
+        borderTopColor: 'transparent',
+        borderBottomColor: 'transparent'
+      },
+      '.cm-tooltip .cm-tooltip-arrow:after': {
+        borderTopColor: colorByRole.tooltipBackground,
+        borderBottomColor: colorByRole.tooltipBackground
+      },
+      '.cm-tooltip-autocomplete': {
+        '& > ul > li[aria-selected]': {
+          backgroundColor: colorByRole.darkBackground,
+          color: colors.midGrey
+        }
+      },
+      '& .cm-lintRange.cm-lintRange-warning::after': {
+        backgroundImage: `url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='6' height='3'><path d='m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0' stroke='${_urlify(colorByRole.warning)}' fill='none' stroke-width='1.2'/></svg>")`,
+      },
+      '& .cm-lintRange.cm-lintRange-error::after': {
+        backgroundImage: `url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='6' height='3'><path d='m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0' stroke='${_urlify(colorByRole.error)}' fill='none' stroke-width='1.2'/></svg>")`,
+      },
+      '& .cm-diagnostic-warning': {
+        border: `1px solid ${colorByRole.warning}`,
+        borderLeft: `5px solid ${colorByRole.warning}`,
+        background: colorByRole.lightBackground,
+      },
+      '& .cm-diagnostic-error': {
+        border: `1px solid ${colorByRole.error}`,
+        borderLeft: `5px solid ${colorByRole.error}`,
+        background: colorByRole.lightBackground
+      },
+      '& .cm-diagnostic': {
+        padding: '3px 8px'
+      }
+    },
+    { dark: false }
+  );
+
+  syntaxHighlighting(HighlightStyle.define([
+    {
+      tag: [ tags.macroName, tags.variableName ],
+      color: colors.waterBlue
+    },
+    {
+      tag: [ tags.special(tags.bracket) ],
+      color: colors.waterBlue,
+      fontWeight: 'bold'
+    },
+    {
+      tag: [ tags.color, tags.name, tags.definition(tags.name), tags.constant(tags.name), tags.standard(tags.name), tags.propertyName, ],
+      color: colors.deepBlue
+    },
+    {
+      tag: [ tags.definition(tags.variableName), tags.function(tags.variableName), tags.function(tags.propertyName) ],
+      color: colors.brightBlue,
+    },
+    { tag: [ tags.labelName ], color: colors.orangeBrown },
+    {
+      tag: [ tags.annotation ],
+      color: colorByRole.invalid
+    },
+    {
+      tag: [ tags.number, tags.changed, tags.annotation, tags.modifier, tags.self, tags.namespace, tags.atom, tags.bool, tags.special(tags.variableName) ],
+      color: colors.red
+    },
+    {
+      tag: [ tags.typeName, tags.className, tags.attributeName ],
+      color: colors.lila
+    },
+    {
+      tag: [ tags.operator, tags.operatorKeyword, tags.tagName, tags.keyword ],
+      color: colors.purple
+    },
+    {
+      tag: [ tags.angleBracket, tags.squareBracket, tags.brace, tags.separator, tags.punctuation ],
+      color: colors.midGrey
+    },
+    {
+      tag: [ tags.regexp ],
+      color: colors.deepBlue
+    },
+    {
+      tag: [ tags.quote ],
+      color: colors.darkGrey
+    },
+    { tag: [ tags.string, tags.character, tags.deleted ], color: colors.orangeBrown },
+    {
+      tag: tags.link,
+      color: colors.mossGreen,
+      textDecoration: 'underline',
+      textUnderlinePosition: 'under'
+    },
+    {
+      tag: [ tags.url, tags.escape, tags.special(tags.string) ],
+      color: colors.red
+    },
+    { tag: [ tags.meta ], color: colors.iceBlue },
+    { tag: [ tags.comment ], color: colors.midGrey, fontStyle: 'italic' },
+    { tag: tags.strong, fontWeight: 'bold', color: colors.deepBlue },
+    { tag: tags.emphasis, fontStyle: 'italic', color: colors.deepBlue },
+    { tag: tags.strikethrough, textDecoration: 'line-through' },
+    { tag: tags.heading, fontWeight: 'bold', color: colors.midGray },
+    { tag: tags.special(tags.heading1), fontWeight: 'bold', color: colors.darkGrey },
+    {
+      tag: [ tags.heading1, tags.heading2, tags.heading3, tags.heading4 ],
+      fontWeight: 'bold',
+      color: colors.midGrey
+    },
+    { tag: [ tags.heading5, tags.heading6, tags.processingInstruction, tags.inserted ], color: colors.grey },
+    {
+      tag: [ tags.contentSeparator ],
+      color: colors.yellow
+    },
+    { tag: tags.invalid, color: colors.midGrey, borderBottom: `1px dotted ${colorByRole.invalid}` }
+  ]));
+
+  const ivory = '#abb2bf',
+        peach = '#f07178',
+        stone = '#7d8799',
+        invalid = '#ffffff',
+        pastelYellow = '#fffce1',
+        pastelOrange = '#ec9e6f',
+        raisinBlack = '#21252b',
+        highlightBackground = 'rgba(0, 0, 0, 0.5)',
+        background = '#292d3e',
+        tooltipBackground = '#353a42',
+        selection = 'rgba(128, 203, 196, 0.2)',
+        cursor = '#ffcc00';
+
+  const urlHash = '%23';
+  const warningColorHex = 'fff890';
+  const errorColor = 'red';
+  const warningBackgroundColor = '#281e16';
+  const errorBackgroundColor = '#281616';
+
+  EditorView.theme(
+    {
+      '&': {
+        color: '#ffffff',
+        backgroundColor: background
+      },
+      '.cm-content': {
+        caretColor: cursor
+      },
+      '&.cm-focused .cm-cursor': {
+        borderLeftColor: cursor
+      },
+      '&.cm-focused .cm-selectionBackground, .cm-selectionBackground, .cm-content ::selection':
+        { backgroundColor: selection },
+      '.cm-panels': { backgroundColor: raisinBlack, color: '#ffffff' },
+      '.cm-panels.cm-panels-top': { borderBottom: '2px solid black' },
+      '.cm-panels.cm-panels-bottom': { borderTop: '2px solid black' },
+      '.cm-searchMatch': {
+        backgroundColor: '#72a1ff59',
+        outline: '1px solid #457dff'
+      },
+      '.cm-searchMatch.cm-searchMatch-selected': {
+        backgroundColor: '#6199ff2f'
+      },
+      '.cm-activeLine': { backgroundColor: highlightBackground },
+      '.cm-selectionMatch': { backgroundColor: '#aafe661a' },
+      '&.cm-focused .cm-matchingBracket, &.cm-focused .cm-nonmatchingBracket': {
+        backgroundColor: '#bad0f847',
+        outline: '1px solid #515a6b'
+      },
+      '.cm-gutters': {
+        background: '#292d3e',
+        color: '#676e95',
+        border: 'none',
+        padding: '0 5px'
+      },
+      '.cm-activeLineGutter': {
+        backgroundColor: highlightBackground
+      },
+      '.cm-foldPlaceholder': {
+        backgroundColor: 'transparent',
+        border: 'none',
+        color: '#ddd'
+      },
+      '.cm-tooltip': {
+        border: 'none',
+        backgroundColor: tooltipBackground
+      },
+      '.cm-tooltip .cm-tooltip-arrow:before': {
+        borderTopColor: 'transparent',
+        borderBottomColor: 'transparent'
+      },
+      '.cm-tooltip .cm-tooltip-arrow:after': {
+        borderTopColor: tooltipBackground,
+        borderBottomColor: tooltipBackground
+      },
+      '.cm-tooltip-autocomplete': {
+        '& > ul > li[aria-selected]': {
+          backgroundColor: highlightBackground,
+          color: ivory
+        }
+      },
+      '& .cm-lintRange.cm-lintRange-warning::after': {
+        backgroundImage: `url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='6' height='3'><path d='m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0' stroke='${urlHash + warningColorHex}' fill='none' stroke-width='1.2'/></svg>")`,
+      },
+      '& .cm-lintRange.cm-lintRange-error::after': {
+        backgroundImage: `url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='6' height='3'><path d='m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0' stroke='${errorColor}' fill='none' stroke-width='1.2'/></svg>")`,
+      },
+      '& .cm-diagnostic-warning': {
+        borderLeft: `5px solid #${warningColorHex}`,
+        background: warningBackgroundColor
+      },
+      '& .cm-diagnostic-error': {
+        borderLeft: `5px solid ${errorColor}`,
+        background: errorBackgroundColor
+      },
+      '& .cm-diagnostic': {
+        borderRadius: '2px',
+        padding: '3px 8px'
+      }
+    },
+    { dark: true }
+  );
+
+  syntaxHighlighting(HighlightStyle.define([
+
+    // Markdown headings
+    { tag: tags.heading1, color: pastelYellow },
+    { tag: tags.heading2, color: pastelYellow },
+    { tag: tags.heading3, color: pastelYellow },
+    { tag: tags.heading4, color: pastelYellow },
+    { tag: tags.heading5, color: pastelYellow },
+    { tag: tags.heading6, color: pastelYellow },
+
+    // Feelers
+    { tag: tags.special(tags.bracket), color: pastelOrange, fontWeight: 'bold' },
+
+    // Everything else
+    { tag: tags.keyword, color: '#c792ea' },
+    { tag: tags.operator, color: '#89ddff' },
+    { tag: tags.special(tags.variableName), color: '#eeffff' },
+    { tag: tags.typeName, color: '#f07178' },
+    { tag: tags.atom, color: '#f78c6c' },
+    { tag: tags.number, color: '#ff5370' },
+    { tag: tags.bool, color: '#ff5370' },
+    { tag: tags.definition(tags.variableName), color: '#82aaff' },
+    { tag: tags.string, color: '#c3e88d' },
+    { tag: tags.comment, color: stone },
+    { tag: tags.tagName, color: '#ff5370' },
+    { tag: tags.bracket, color: '#a2a1a4' },
+    { tag: tags.meta, color: '#ffcb6b' },
+    { tag: tags.special(tags.string), color: peach },
+    { tag: tags.propertyName, color: pastelOrange },
+    { tag: tags.variableName, color: pastelOrange },
+    { tag: tags.attributeName, color: peach },
+    { tag: tags.className, color: peach },
+    { tag: tags.invalid, color: invalid }
   ]));
 
   // This file was generated by lezer-generator. You probably shouldn't edit it.
@@ -32506,85 +31556,85 @@
     FeelBlock = 2,
     SimpleTextBlock = 3;
 
-  /* global console */
-
-  const CHAR_TABLE = {
-    '{': 123,
-    '}': 125
-  };
-
-  const isClosingFeelScope = (input, offset = 0) => {
-
-    const isReadingCloseCurrent = input.peek(offset) === CHAR_TABLE['}'];
-    const isReadingCloseAhead = input.peek(offset + 1) === CHAR_TABLE['}'];
-
-    const isReadingClose = isReadingCloseCurrent && isReadingCloseAhead;
-
-    return isReadingClose || input.peek(offset) === -1;
-
-  };
-
-  const feelBlock = new ExternalTokenizer((input, stack) => {
-
-    let lookAhead = 0;
-
-    // check if we haven't reached the end of a templating tag
-    while (!isClosingFeelScope(input, lookAhead)) { lookAhead++; }
-
-    if (lookAhead > 0) {
-      input.advance(lookAhead);
-      input.acceptToken(FeelBlock);
-    }
-
-  });
-
-  const isClosingTextScope = (input, offset = 0) => {
-    const isReadingOpenCurrent = input.peek(offset) === CHAR_TABLE['{'];
-    const isReadingOpenAhead = input.peek(offset + 1) === CHAR_TABLE['{'];
-
-    const isReadOpen = isReadingOpenCurrent && isReadingOpenAhead;
-
-    return isReadOpen || input.peek(offset) === -1;
-  };
-
-
-  const simpleTextBlock = new ExternalTokenizer((input, stack) => {
-
-    let lookAhead = 0;
-
-    // check if we haven't reached the start of a templating tag
-    while (!isClosingTextScope(input, lookAhead)) { lookAhead++; }
-
-    if (lookAhead > 0) {
-      input.advance(lookAhead);
-      input.acceptToken(SimpleTextBlock);
-    }
-
-  });
-
-  // Anytime this tokenizer is run, simply tag the rest of the input as FEEL
-  const feel = new ExternalTokenizer((input, stack) => {
-
-    let lookAhead = 0;
-
-    while (input.peek(lookAhead) !== -1) { lookAhead++; }
-
-    if (lookAhead > 0) {
-      input.advance(lookAhead);
-      input.acceptToken(Feel);
-    }
-
+  /* global console */
+
+  const CHAR_TABLE = {
+    '{': 123,
+    '}': 125
+  };
+
+  const isClosingFeelScope = (input, offset = 0) => {
+
+    const isReadingCloseCurrent = input.peek(offset) === CHAR_TABLE['}'];
+    const isReadingCloseAhead = input.peek(offset + 1) === CHAR_TABLE['}'];
+
+    const isReadingClose = isReadingCloseCurrent && isReadingCloseAhead;
+
+    return isReadingClose || input.peek(offset) === -1;
+
+  };
+
+  const feelBlock = new ExternalTokenizer((input, stack) => {
+
+    let lookAhead = 0;
+
+    // check if we haven't reached the end of a templating tag
+    while (!isClosingFeelScope(input, lookAhead)) { lookAhead++; }
+
+    if (lookAhead > 0) {
+      input.advance(lookAhead);
+      input.acceptToken(FeelBlock);
+    }
+
+  });
+
+  const isClosingTextScope = (input, offset = 0) => {
+    const isReadingOpenCurrent = input.peek(offset) === CHAR_TABLE['{'];
+    const isReadingOpenAhead = input.peek(offset + 1) === CHAR_TABLE['{'];
+
+    const isReadOpen = isReadingOpenCurrent && isReadingOpenAhead;
+
+    return isReadOpen || input.peek(offset) === -1;
+  };
+
+
+  const simpleTextBlock = new ExternalTokenizer((input, stack) => {
+
+    let lookAhead = 0;
+
+    // check if we haven't reached the start of a templating tag
+    while (!isClosingTextScope(input, lookAhead)) { lookAhead++; }
+
+    if (lookAhead > 0) {
+      input.advance(lookAhead);
+      input.acceptToken(SimpleTextBlock);
+    }
+
+  });
+
+  // Anytime this tokenizer is run, simply tag the rest of the input as FEEL
+  const feel = new ExternalTokenizer((input, stack) => {
+
+    let lookAhead = 0;
+
+    while (input.peek(lookAhead) !== -1) { lookAhead++; }
+
+    if (lookAhead > 0) {
+      input.advance(lookAhead);
+      input.acceptToken(Feel);
+    }
+
   });
 
-  const feelersHighlighting = styleTags({
-    ConditionalSpanner: tags.special(tags.bracket),
-    ConditionalSpannerClose: tags.special(tags.bracket),
-    ConditionalSpannerCloseNl: tags.special(tags.bracket),
-    LoopSpanner: tags.special(tags.bracket),
-    LoopSpannerClose: tags.special(tags.bracket),
-    LoopSpannerCloseNl: tags.special(tags.bracket),
-    EmptyInsert: tags.special(tags.bracket),
-    Insert: tags.special(tags.bracket),
+  const feelersHighlighting = styleTags({
+    ConditionalSpanner: tags.special(tags.bracket),
+    ConditionalSpannerClose: tags.special(tags.bracket),
+    ConditionalSpannerCloseNl: tags.special(tags.bracket),
+    LoopSpanner: tags.special(tags.bracket),
+    LoopSpannerClose: tags.special(tags.bracket),
+    LoopSpannerCloseNl: tags.special(tags.bracket),
+    EmptyInsert: tags.special(tags.bracket),
+    Insert: tags.special(tags.bracket),
   });
 
   // This file was generated by lezer-generator. You probably shouldn't edit it.
@@ -32604,6444 +31654,359 @@
     tokenPrec: 0
   });
 
-  function buildSimpleTree(parseTree, templateString) {
-
-    const stack = [ { children: [] } ];
-    const isLeafNode = (node) => [ 'SimpleTextBlock', 'Feel', 'FeelBlock' ].includes(node.type.name);
-
-    parseTree.iterate({
-      enter: (node, pos, type) => {
-
-        const nodeRepresentation = {
-          name: node.type.name,
-          children: []
-        };
-
-        if (isLeafNode(node)) {
-          nodeRepresentation.content = templateString.slice(node.from, node.to);
-        }
-
-        stack.push(nodeRepresentation);
-      },
-      leave: (node, pos, type) => {
-        const result = stack.pop();
-        const parent = stack[stack.length - 1];
-        result.parent = parent;
-        parent.children.push(result);
-      }
-    });
-
-    return stack[0].children[0];
-  }
-
-  /**
-   * @typedef {object} EvaluationOptions
-   * @property {boolean} [debug=false] - whether to enable debug mode, which displays errors inline instead of throwing them
-   * @property {function} [buildDebugString=(e) => `{{ ${e.message.toLowerCase()} }}`] - function that takes an error and returns the string to display in debug mode
-   * @property {boolean} [strict=false] - whether to expect strict data types out of our FEEL expression, e.g. boolean for conditionals
-   */
-
-  /**
-   * @param {string} templateString - the template string to evaluate
-   * @param {object} [context={}] - the context object to evaluate the template string against
-   * @param {EvaluationOptions} [options={}] - options to configure the evaluation
-   * @return {string} the evaluated template string
-   */
-  const evaluate = (templateString, context = {}, options = {}) => {
-
-    const {
-      debug = false,
-      buildDebugString = (e) => `{{ ${e.message.toLowerCase()} }}`,
-      strict = false
-    } = options;
-
-    const parseTree = parser.parse(templateString);
-
-    const simpleTreeRoot = buildSimpleTree(parseTree, templateString);
-
-    const evaluateNode = buildNodeEvaluator(debug, buildDebugString, strict);
-
-    return evaluateNode(simpleTreeRoot, enhanceContext(context, null));
-
-  };
-
-  const buildNodeEvaluator = (debug, buildDebugString, strict) => {
-
-    const errorHandler = (error) => {
-
-      if (debug) {
-        return buildDebugString(error);
-      }
-
-      throw error;
-    };
-
-    const evaluateNodeValue = (node, context = {}) => {
-
-      switch (node.name) {
-
-      case 'SimpleTextBlock':
-        return node.content;
-
-      case 'Insert': {
-        const feel = node.children[0].content;
-
-        try {
-          return evaluate$1(feel, context);
-        }
-        catch {
-          return errorHandler(new Error(`FEEL expression ${feel} couldn't be evaluated`));
-        }
-      }
-
-      case 'EmptyInsert':
-        return '';
-
-      case 'Feel':
-      case 'FeelBlock': {
-        try {
-          return evaluate$1(node.content, context);
-        }
-        catch {
-          return errorHandler(new Error(`FEEL expression ${node.content} couldn't be evaluated`));
-        }
-      }
-
-      case 'Feelers':
-        return node.children.map(child => evaluateNode(child, context)).join('');
-
-      case 'ConditionalSpanner': {
-        const feel = node.children[0].content;
-        let shouldRender;
-
-        try {
-          shouldRender = evaluate$1(feel, context);
-        }
-        catch {
-          return errorHandler(new Error(`FEEL expression ${feel} couldn't be evaluated`));
-        }
-
-        if (strict && typeof(shouldRender) !== 'boolean') {
-          return errorHandler(new Error(`FEEL expression ${feel} expected to evaluate to a boolean`));
-        }
-
-        if (shouldRender) {
-          const children = node.children.slice(1, node.children.length - 1);
-          const innerRender = children.map(child => evaluateNode(child, context)).join('');
-
-          const closeNode = node.children[node.children.length - 1];
-          const shouldAddNewline = closeNode.name.endsWith('Nl') && !innerRender.endsWith('\n');
-
-          return innerRender + (shouldAddNewline ? '\n' : '');
-        }
-
-        return '';
-      }
-
-      case 'LoopSpanner': {
-        const feel = node.children[0].content;
-        let loopArray;
-
-        try {
-          loopArray = evaluate$1(feel, context);
-        }
-        catch {
-          return errorHandler(new Error(`FEEL expression ${feel} couldn't be evaluated`));
-        }
-
-        if (!Array.isArray(loopArray)) {
-
-          if (strict) {
-            return errorHandler(new Error(`FEEL expression ${feel} expected to evaluate to an array`));
-          }
-
-          // if not strict, we treat undefined/null as an empty array
-          else if (loopArray === undefined || loopArray === null) {
-            loopArray = [];
-          }
-
-          // if not strict, we treat a single item as an array with one item
-          else {
-            loopArray = [ loopArray ];
-          }
-
-        }
-
-        const childrenToLoop = node.children.slice(1, node.children.length - 1);
-
-        const evaluateChildren = (arrayElement, parentContext) => {
-          const childContext = enhanceContext(arrayElement, parentContext);
-          return childrenToLoop.map(child => evaluateNode(child, childContext)).join('');
-        };
-
-        const innerRender = loopArray.map(arrayElement => evaluateChildren(arrayElement, context)).join('');
-        const closeNode = node.children[node.children.length - 1];
-        const shouldAddNewline = closeNode.name.endsWith('Nl') && !innerRender.endsWith('\n');
-
-        return innerRender + (shouldAddNewline ? '\n' : '');
-      }}
-
-    };
-
-    const evaluateNode = (node, context = {}) => {
-      try {
-        return evaluateNodeValue(node, context);
-      } catch (error) {
-        return errorHandler(error);
-      }
-    };
-
-    return evaluateNode;
-
-  };
-
-  const enhanceContext = (context, parentContext) => {
-
-    if (typeof(context) === 'object') {
-      return { this: context, parent: parentContext, ...context, _this_: context, _parent_: parentContext };
-    }
-
-    return { this: context, parent: parentContext, _this_: context, _parent_: parentContext };
-
-  };
+  function buildSimpleTree(parseTree, templateString) {
+
+    const stack = [ { children: [] } ];
+    const isLeafNode = (node) => [ 'SimpleTextBlock', 'Feel', 'FeelBlock' ].includes(node.type.name);
+
+    parseTree.iterate({
+      enter: (node, pos, type) => {
+
+        const nodeRepresentation = {
+          name: node.type.name,
+          children: []
+        };
+
+        if (isLeafNode(node)) {
+          nodeRepresentation.content = templateString.slice(node.from, node.to);
+        }
+
+        stack.push(nodeRepresentation);
+      },
+      leave: (node, pos, type) => {
+        const result = stack.pop();
+        const parent = stack[stack.length - 1];
+        result.parent = parent;
+        parent.children.push(result);
+      }
+    });
 
-  /**
-   * Create warnings for empty inserts in the given tree.
-   *
-   * @param {Tree} syntaxTree
-   * @returns {LintMessage[]} array of syntax errors
-   */
-  function lintEmptyInserts(syntaxTree) {
-
-    const lintMessages = [];
-
-    syntaxTree.iterate({
-      enter: node => {
-        if (node.type.name === 'EmptyInsert') {
-          lintMessages.push(
-            {
-              from: node.from,
-              to: node.to,
-              severity: 'warning',
-              message: 'this insert is empty and will be ignored',
-              type: 'emptyInsert'
-            }
-          );
-        }
-      }
-    });
-
-    return lintMessages;
-  }
-
-  /**
-   * Generates lint messages for the given syntax tree.
-   *
-   * @param {Tree} syntaxTree
-   * @returns {LintMessage[]} array of all lint messages
-   */
-  function lintAll(syntaxTree) {
-
-    const lintMessages = [
-
-      ...lintEmptyInserts(syntaxTree)
-    ];
-
-    return lintMessages;
-  }
-
-
-  /**
-   * CodeMirror extension that provides linting for FEEL expressions.
-   *
-   * @param {EditorView} editorView
-   * @returns {Source} CodeMirror linting source
-   */
-  function cmFeelersLinter() {
-    const lintFeel = cmFeelLinter();
-    return editorView => {
-
-      const feelMessages = lintFeel(editorView);
-
-      // don't lint if the Editor is empty
-      if (editorView.state.doc.length === 0) {
-        return [];
-      }
-
-      const tree = syntaxTree(editorView.state);
-
-      const feelersMessages = lintAll(tree);
-
-      return [
-        ...feelMessages,
-        ...feelersMessages.map(message => ({
-          ...message,
-          source: 'feelers linter'
-        }))
-      ];
-    };
+    return stack[0].children[0];
   }
 
-  linter(cmFeelersLinter());
+  /**
+   * @typedef {object} EvaluationOptions
+   * @property {boolean} [debug=false] - whether to enable debug mode, which displays errors inline instead of throwing them
+   * @property {function} [buildDebugString=(e) => `{{ ${e.message.toLowerCase()} }}`] - function that takes an error and returns the string to display in debug mode
+   * @property {boolean} [strict=false] - whether to expect strict data types out of our FEEL expression, e.g. boolean for conditionals
+   */
 
-  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+  /**
+   * @param {string} templateString - the template string to evaluate
+   * @param {object} [context={}] - the context object to evaluate the template string against
+   * @param {EvaluationOptions} [options={}] - options to configure the evaluation
+   * @return {string} the evaluated template string
+   */
+  const evaluate = (templateString, context = {}, options = {}) => {
 
-  var showdownExports = {};
-  var showdown = {
-    get exports(){ return showdownExports; },
-    set exports(v){ showdownExports = v; },
-  };
+    const {
+      debug = false,
+      buildDebugString = (e) => `{{ ${e.message.toLowerCase()} }}`,
+      strict = false
+    } = options;
 
-  (function (module) {
-  	(function(){
-  	/**
-  	 * Created by Tivie on 13-07-2015.
-  	 */
+    const parseTree = parser.parse(templateString);
 
-  	function getDefaultOpts (simple) {
+    const simpleTreeRoot = buildSimpleTree(parseTree, templateString);
 
-  	  var defaultOptions = {
-  	    omitExtraWLInCodeBlocks: {
-  	      defaultValue: false,
-  	      describe: 'Omit the default extra whiteline added to code blocks',
-  	      type: 'boolean'
-  	    },
-  	    noHeaderId: {
-  	      defaultValue: false,
-  	      describe: 'Turn on/off generated header id',
-  	      type: 'boolean'
-  	    },
-  	    prefixHeaderId: {
-  	      defaultValue: false,
-  	      describe: 'Add a prefix to the generated header ids. Passing a string will prefix that string to the header id. Setting to true will add a generic \'section-\' prefix',
-  	      type: 'string'
-  	    },
-  	    rawPrefixHeaderId: {
-  	      defaultValue: false,
-  	      describe: 'Setting this option to true will prevent showdown from modifying the prefix. This might result in malformed IDs (if, for instance, the " char is used in the prefix)',
-  	      type: 'boolean'
-  	    },
-  	    ghCompatibleHeaderId: {
-  	      defaultValue: false,
-  	      describe: 'Generate header ids compatible with github style (spaces are replaced with dashes, a bunch of non alphanumeric chars are removed)',
-  	      type: 'boolean'
-  	    },
-  	    rawHeaderId: {
-  	      defaultValue: false,
-  	      describe: 'Remove only spaces, \' and " from generated header ids (including prefixes), replacing them with dashes (-). WARNING: This might result in malformed ids',
-  	      type: 'boolean'
-  	    },
-  	    headerLevelStart: {
-  	      defaultValue: false,
-  	      describe: 'The header blocks level start',
-  	      type: 'integer'
-  	    },
-  	    parseImgDimensions: {
-  	      defaultValue: false,
-  	      describe: 'Turn on/off image dimension parsing',
-  	      type: 'boolean'
-  	    },
-  	    simplifiedAutoLink: {
-  	      defaultValue: false,
-  	      describe: 'Turn on/off GFM autolink style',
-  	      type: 'boolean'
-  	    },
-  	    excludeTrailingPunctuationFromURLs: {
-  	      defaultValue: false,
-  	      describe: 'Excludes trailing punctuation from links generated with autoLinking',
-  	      type: 'boolean'
-  	    },
-  	    literalMidWordUnderscores: {
-  	      defaultValue: false,
-  	      describe: 'Parse midword underscores as literal underscores',
-  	      type: 'boolean'
-  	    },
-  	    literalMidWordAsterisks: {
-  	      defaultValue: false,
-  	      describe: 'Parse midword asterisks as literal asterisks',
-  	      type: 'boolean'
-  	    },
-  	    strikethrough: {
-  	      defaultValue: false,
-  	      describe: 'Turn on/off strikethrough support',
-  	      type: 'boolean'
-  	    },
-  	    tables: {
-  	      defaultValue: false,
-  	      describe: 'Turn on/off tables support',
-  	      type: 'boolean'
-  	    },
-  	    tablesHeaderId: {
-  	      defaultValue: false,
-  	      describe: 'Add an id to table headers',
-  	      type: 'boolean'
-  	    },
-  	    ghCodeBlocks: {
-  	      defaultValue: true,
-  	      describe: 'Turn on/off GFM fenced code blocks support',
-  	      type: 'boolean'
-  	    },
-  	    tasklists: {
-  	      defaultValue: false,
-  	      describe: 'Turn on/off GFM tasklist support',
-  	      type: 'boolean'
-  	    },
-  	    smoothLivePreview: {
-  	      defaultValue: false,
-  	      describe: 'Prevents weird effects in live previews due to incomplete input',
-  	      type: 'boolean'
-  	    },
-  	    smartIndentationFix: {
-  	      defaultValue: false,
-  	      describe: 'Tries to smartly fix indentation in es6 strings',
-  	      type: 'boolean'
-  	    },
-  	    disableForced4SpacesIndentedSublists: {
-  	      defaultValue: false,
-  	      describe: 'Disables the requirement of indenting nested sublists by 4 spaces',
-  	      type: 'boolean'
-  	    },
-  	    simpleLineBreaks: {
-  	      defaultValue: false,
-  	      describe: 'Parses simple line breaks as <br> (GFM Style)',
-  	      type: 'boolean'
-  	    },
-  	    requireSpaceBeforeHeadingText: {
-  	      defaultValue: false,
-  	      describe: 'Makes adding a space between `#` and the header text mandatory (GFM Style)',
-  	      type: 'boolean'
-  	    },
-  	    ghMentions: {
-  	      defaultValue: false,
-  	      describe: 'Enables github @mentions',
-  	      type: 'boolean'
-  	    },
-  	    ghMentionsLink: {
-  	      defaultValue: 'https://github.com/{u}',
-  	      describe: 'Changes the link generated by @mentions. Only applies if ghMentions option is enabled.',
-  	      type: 'string'
-  	    },
-  	    encodeEmails: {
-  	      defaultValue: true,
-  	      describe: 'Encode e-mail addresses through the use of Character Entities, transforming ASCII e-mail addresses into its equivalent decimal entities',
-  	      type: 'boolean'
-  	    },
-  	    openLinksInNewWindow: {
-  	      defaultValue: false,
-  	      describe: 'Open all links in new windows',
-  	      type: 'boolean'
-  	    },
-  	    backslashEscapesHTMLTags: {
-  	      defaultValue: false,
-  	      describe: 'Support for HTML Tag escaping. ex: \<div>foo\</div>',
-  	      type: 'boolean'
-  	    },
-  	    emoji: {
-  	      defaultValue: false,
-  	      describe: 'Enable emoji support. Ex: `this is a :smile: emoji`',
-  	      type: 'boolean'
-  	    },
-  	    underline: {
-  	      defaultValue: false,
-  	      describe: 'Enable support for underline. Syntax is double or triple underscores: `__underline word__`. With this option enabled, underscores no longer parses into `<em>` and `<strong>`',
-  	      type: 'boolean'
-  	    },
-  	    ellipsis: {
-  	      defaultValue: true,
-  	      describe: 'Replaces three dots with the ellipsis unicode character',
-  	      type: 'boolean'
-  	    },
-  	    completeHTMLDocument: {
-  	      defaultValue: false,
-  	      describe: 'Outputs a complete html document, including `<html>`, `<head>` and `<body>` tags',
-  	      type: 'boolean'
-  	    },
-  	    metadata: {
-  	      defaultValue: false,
-  	      describe: 'Enable support for document metadata (defined at the top of the document between `«««` and `»»»` or between `---` and `---`).',
-  	      type: 'boolean'
-  	    },
-  	    splitAdjacentBlockquotes: {
-  	      defaultValue: false,
-  	      describe: 'Split adjacent blockquote blocks',
-  	      type: 'boolean'
-  	    }
-  	  };
-  	  if (simple === false) {
-  	    return JSON.parse(JSON.stringify(defaultOptions));
-  	  }
-  	  var ret = {};
-  	  for (var opt in defaultOptions) {
-  	    if (defaultOptions.hasOwnProperty(opt)) {
-  	      ret[opt] = defaultOptions[opt].defaultValue;
-  	    }
-  	  }
-  	  return ret;
-  	}
+    const evaluateNode = buildNodeEvaluator(debug, buildDebugString, strict);
 
-  	function allOptionsOn () {
-  	  var options = getDefaultOpts(true),
-  	      ret = {};
-  	  for (var opt in options) {
-  	    if (options.hasOwnProperty(opt)) {
-  	      ret[opt] = true;
-  	    }
-  	  }
-  	  return ret;
-  	}
-
-  	/**
-  	 * Created by Tivie on 06-01-2015.
-  	 */
+    return evaluateNode(simpleTreeRoot, enhanceContext(context, null));
 
-  	// Private properties
-  	var showdown = {},
-  	    parsers = {},
-  	    extensions = {},
-  	    globalOptions = getDefaultOpts(true),
-  	    setFlavor = 'vanilla',
-  	    flavor = {
-  	      github: {
-  	        omitExtraWLInCodeBlocks:              true,
-  	        simplifiedAutoLink:                   true,
-  	        excludeTrailingPunctuationFromURLs:   true,
-  	        literalMidWordUnderscores:            true,
-  	        strikethrough:                        true,
-  	        tables:                               true,
-  	        tablesHeaderId:                       true,
-  	        ghCodeBlocks:                         true,
-  	        tasklists:                            true,
-  	        disableForced4SpacesIndentedSublists: true,
-  	        simpleLineBreaks:                     true,
-  	        requireSpaceBeforeHeadingText:        true,
-  	        ghCompatibleHeaderId:                 true,
-  	        ghMentions:                           true,
-  	        backslashEscapesHTMLTags:             true,
-  	        emoji:                                true,
-  	        splitAdjacentBlockquotes:             true
-  	      },
-  	      original: {
-  	        noHeaderId:                           true,
-  	        ghCodeBlocks:                         false
-  	      },
-  	      ghost: {
-  	        omitExtraWLInCodeBlocks:              true,
-  	        parseImgDimensions:                   true,
-  	        simplifiedAutoLink:                   true,
-  	        excludeTrailingPunctuationFromURLs:   true,
-  	        literalMidWordUnderscores:            true,
-  	        strikethrough:                        true,
-  	        tables:                               true,
-  	        tablesHeaderId:                       true,
-  	        ghCodeBlocks:                         true,
-  	        tasklists:                            true,
-  	        smoothLivePreview:                    true,
-  	        simpleLineBreaks:                     true,
-  	        requireSpaceBeforeHeadingText:        true,
-  	        ghMentions:                           false,
-  	        encodeEmails:                         true
-  	      },
-  	      vanilla: getDefaultOpts(true),
-  	      allOn: allOptionsOn()
-  	    };
+  };
 
-  	/**
-  	 * helper namespace
-  	 * @type {{}}
-  	 */
-  	showdown.helper = {};
+  const buildNodeEvaluator = (debug, buildDebugString, strict) => {
 
-  	/**
-  	 * TODO LEGACY SUPPORT CODE
-  	 * @type {{}}
-  	 */
-  	showdown.extensions = {};
+    const errorHandler = (error) => {
 
-  	/**
-  	 * Set a global option
-  	 * @static
-  	 * @param {string} key
-  	 * @param {*} value
-  	 * @returns {showdown}
-  	 */
-  	showdown.setOption = function (key, value) {
-  	  globalOptions[key] = value;
-  	  return this;
-  	};
+      if (debug) {
+        return buildDebugString(error);
+      }
 
-  	/**
-  	 * Get a global option
-  	 * @static
-  	 * @param {string} key
-  	 * @returns {*}
-  	 */
-  	showdown.getOption = function (key) {
-  	  return globalOptions[key];
-  	};
+      throw error;
+    };
 
-  	/**
-  	 * Get the global options
-  	 * @static
-  	 * @returns {{}}
-  	 */
-  	showdown.getOptions = function () {
-  	  return globalOptions;
-  	};
+    const evaluateNodeValue = (node, context = {}) => {
 
-  	/**
-  	 * Reset global options to the default values
-  	 * @static
-  	 */
-  	showdown.resetOptions = function () {
-  	  globalOptions = getDefaultOpts(true);
-  	};
+      switch (node.name) {
 
-  	/**
-  	 * Set the flavor showdown should use as default
-  	 * @param {string} name
-  	 */
-  	showdown.setFlavor = function (name) {
-  	  if (!flavor.hasOwnProperty(name)) {
-  	    throw Error(name + ' flavor was not found');
-  	  }
-  	  showdown.resetOptions();
-  	  var preset = flavor[name];
-  	  setFlavor = name;
-  	  for (var option in preset) {
-  	    if (preset.hasOwnProperty(option)) {
-  	      globalOptions[option] = preset[option];
-  	    }
-  	  }
-  	};
+      case 'SimpleTextBlock':
+        return node.content;
 
-  	/**
-  	 * Get the currently set flavor
-  	 * @returns {string}
-  	 */
-  	showdown.getFlavor = function () {
-  	  return setFlavor;
-  	};
+      case 'Insert': {
+        const feel = node.children[0].content;
 
-  	/**
-  	 * Get the options of a specified flavor. Returns undefined if the flavor was not found
-  	 * @param {string} name Name of the flavor
-  	 * @returns {{}|undefined}
-  	 */
-  	showdown.getFlavorOptions = function (name) {
-  	  if (flavor.hasOwnProperty(name)) {
-  	    return flavor[name];
-  	  }
-  	};
+        try {
+          return evaluate$1(feel, context);
+        }
+        catch {
+          return errorHandler(new Error(`FEEL expression ${feel} couldn't be evaluated`));
+        }
+      }
 
-  	/**
-  	 * Get the default options
-  	 * @static
-  	 * @param {boolean} [simple=true]
-  	 * @returns {{}}
-  	 */
-  	showdown.getDefaultOptions = function (simple) {
-  	  return getDefaultOpts(simple);
-  	};
+      case 'EmptyInsert':
+        return '';
 
-  	/**
-  	 * Get or set a subParser
-  	 *
-  	 * subParser(name)       - Get a registered subParser
-  	 * subParser(name, func) - Register a subParser
-  	 * @static
-  	 * @param {string} name
-  	 * @param {function} [func]
-  	 * @returns {*}
-  	 */
-  	showdown.subParser = function (name, func) {
-  	  if (showdown.helper.isString(name)) {
-  	    if (typeof func !== 'undefined') {
-  	      parsers[name] = func;
-  	    } else {
-  	      if (parsers.hasOwnProperty(name)) {
-  	        return parsers[name];
-  	      } else {
-  	        throw Error('SubParser named ' + name + ' not registered!');
-  	      }
-  	    }
-  	  }
-  	};
+      case 'Feel':
+      case 'FeelBlock': {
+        try {
+          return evaluate$1(node.content, context);
+        }
+        catch {
+          return errorHandler(new Error(`FEEL expression ${node.content} couldn't be evaluated`));
+        }
+      }
 
-  	/**
-  	 * Gets or registers an extension
-  	 * @static
-  	 * @param {string} name
-  	 * @param {object|object[]|function=} ext
-  	 * @returns {*}
-  	 */
-  	showdown.extension = function (name, ext) {
+      case 'Feelers':
+        return node.children.map(child => evaluateNode(child, context)).join('');
 
-  	  if (!showdown.helper.isString(name)) {
-  	    throw Error('Extension \'name\' must be a string');
-  	  }
+      case 'ConditionalSpanner': {
+        const feel = node.children[0].content;
+        let shouldRender;
 
-  	  name = showdown.helper.stdExtName(name);
+        try {
+          shouldRender = evaluate$1(feel, context);
+        }
+        catch {
+          return errorHandler(new Error(`FEEL expression ${feel} couldn't be evaluated`));
+        }
 
-  	  // Getter
-  	  if (showdown.helper.isUndefined(ext)) {
-  	    if (!extensions.hasOwnProperty(name)) {
-  	      throw Error('Extension named ' + name + ' is not registered!');
-  	    }
-  	    return extensions[name];
+        if (strict && typeof(shouldRender) !== 'boolean') {
+          return errorHandler(new Error(`FEEL expression ${feel} expected to evaluate to a boolean`));
+        }
 
-  	    // Setter
-  	  } else {
-  	    // Expand extension if it's wrapped in a function
-  	    if (typeof ext === 'function') {
-  	      ext = ext();
-  	    }
+        if (shouldRender) {
+          const children = node.children.slice(1, node.children.length - 1);
+          const innerRender = children.map(child => evaluateNode(child, context)).join('');
 
-  	    // Ensure extension is an array
-  	    if (!showdown.helper.isArray(ext)) {
-  	      ext = [ext];
-  	    }
+          const closeNode = node.children[node.children.length - 1];
+          const shouldAddNewline = closeNode.name.endsWith('Nl') && !innerRender.endsWith('\n');
 
-  	    var validExtension = validate(ext, name);
+          return innerRender + (shouldAddNewline ? '\n' : '');
+        }
 
-  	    if (validExtension.valid) {
-  	      extensions[name] = ext;
-  	    } else {
-  	      throw Error(validExtension.error);
-  	    }
-  	  }
-  	};
+        return '';
+      }
 
-  	/**
-  	 * Gets all extensions registered
-  	 * @returns {{}}
-  	 */
-  	showdown.getAllExtensions = function () {
-  	  return extensions;
-  	};
+      case 'LoopSpanner': {
+        const feel = node.children[0].content;
+        let loopArray;
 
-  	/**
-  	 * Remove an extension
-  	 * @param {string} name
-  	 */
-  	showdown.removeExtension = function (name) {
-  	  delete extensions[name];
-  	};
+        try {
+          loopArray = evaluate$1(feel, context);
+        }
+        catch {
+          return errorHandler(new Error(`FEEL expression ${feel} couldn't be evaluated`));
+        }
 
-  	/**
-  	 * Removes all extensions
-  	 */
-  	showdown.resetExtensions = function () {
-  	  extensions = {};
-  	};
+        if (!Array.isArray(loopArray)) {
 
-  	/**
-  	 * Validate extension
-  	 * @param {array} extension
-  	 * @param {string} name
-  	 * @returns {{valid: boolean, error: string}}
-  	 */
-  	function validate (extension, name) {
+          if (strict) {
+            return errorHandler(new Error(`FEEL expression ${feel} expected to evaluate to an array`));
+          }
 
-  	  var errMsg = (name) ? 'Error in ' + name + ' extension->' : 'Error in unnamed extension',
-  	      ret = {
-  	        valid: true,
-  	        error: ''
-  	      };
+          // if not strict, we treat undefined/null as an empty array
+          else if (loopArray === undefined || loopArray === null) {
+            loopArray = [];
+          }
 
-  	  if (!showdown.helper.isArray(extension)) {
-  	    extension = [extension];
-  	  }
+          // if not strict, we treat a single item as an array with one item
+          else {
+            loopArray = [ loopArray ];
+          }
 
-  	  for (var i = 0; i < extension.length; ++i) {
-  	    var baseMsg = errMsg + ' sub-extension ' + i + ': ',
-  	        ext = extension[i];
-  	    if (typeof ext !== 'object') {
-  	      ret.valid = false;
-  	      ret.error = baseMsg + 'must be an object, but ' + typeof ext + ' given';
-  	      return ret;
-  	    }
+        }
 
-  	    if (!showdown.helper.isString(ext.type)) {
-  	      ret.valid = false;
-  	      ret.error = baseMsg + 'property "type" must be a string, but ' + typeof ext.type + ' given';
-  	      return ret;
-  	    }
+        const childrenToLoop = node.children.slice(1, node.children.length - 1);
 
-  	    var type = ext.type = ext.type.toLowerCase();
+        const evaluateChildren = (arrayElement, parentContext) => {
+          const childContext = enhanceContext(arrayElement, parentContext);
+          return childrenToLoop.map(child => evaluateNode(child, childContext)).join('');
+        };
 
-  	    // normalize extension type
-  	    if (type === 'language') {
-  	      type = ext.type = 'lang';
-  	    }
+        const innerRender = loopArray.map(arrayElement => evaluateChildren(arrayElement, context)).join('');
+        const closeNode = node.children[node.children.length - 1];
+        const shouldAddNewline = closeNode.name.endsWith('Nl') && !innerRender.endsWith('\n');
 
-  	    if (type === 'html') {
-  	      type = ext.type = 'output';
-  	    }
+        return innerRender + (shouldAddNewline ? '\n' : '');
+      }}
 
-  	    if (type !== 'lang' && type !== 'output' && type !== 'listener') {
-  	      ret.valid = false;
-  	      ret.error = baseMsg + 'type ' + type + ' is not recognized. Valid values: "lang/language", "output/html" or "listener"';
-  	      return ret;
-  	    }
+    };
 
-  	    if (type === 'listener') {
-  	      if (showdown.helper.isUndefined(ext.listeners)) {
-  	        ret.valid = false;
-  	        ret.error = baseMsg + '. Extensions of type "listener" must have a property called "listeners"';
-  	        return ret;
-  	      }
-  	    } else {
-  	      if (showdown.helper.isUndefined(ext.filter) && showdown.helper.isUndefined(ext.regex)) {
-  	        ret.valid = false;
-  	        ret.error = baseMsg + type + ' extensions must define either a "regex" property or a "filter" method';
-  	        return ret;
-  	      }
-  	    }
+    const evaluateNode = (node, context = {}) => {
+      try {
+        return evaluateNodeValue(node, context);
+      } catch (error) {
+        return errorHandler(error);
+      }
+    };
 
-  	    if (ext.listeners) {
-  	      if (typeof ext.listeners !== 'object') {
-  	        ret.valid = false;
-  	        ret.error = baseMsg + '"listeners" property must be an object but ' + typeof ext.listeners + ' given';
-  	        return ret;
-  	      }
-  	      for (var ln in ext.listeners) {
-  	        if (ext.listeners.hasOwnProperty(ln)) {
-  	          if (typeof ext.listeners[ln] !== 'function') {
-  	            ret.valid = false;
-  	            ret.error = baseMsg + '"listeners" property must be an hash of [event name]: [callback]. listeners.' + ln +
-  	              ' must be a function but ' + typeof ext.listeners[ln] + ' given';
-  	            return ret;
-  	          }
-  	        }
-  	      }
-  	    }
+    return evaluateNode;
 
-  	    if (ext.filter) {
-  	      if (typeof ext.filter !== 'function') {
-  	        ret.valid = false;
-  	        ret.error = baseMsg + '"filter" must be a function, but ' + typeof ext.filter + ' given';
-  	        return ret;
-  	      }
-  	    } else if (ext.regex) {
-  	      if (showdown.helper.isString(ext.regex)) {
-  	        ext.regex = new RegExp(ext.regex, 'g');
-  	      }
-  	      if (!(ext.regex instanceof RegExp)) {
-  	        ret.valid = false;
-  	        ret.error = baseMsg + '"regex" property must either be a string or a RegExp object, but ' + typeof ext.regex + ' given';
-  	        return ret;
-  	      }
-  	      if (showdown.helper.isUndefined(ext.replace)) {
-  	        ret.valid = false;
-  	        ret.error = baseMsg + '"regex" extensions must implement a replace string or function';
-  	        return ret;
-  	      }
-  	    }
-  	  }
-  	  return ret;
-  	}
+  };
 
-  	/**
-  	 * Validate extension
-  	 * @param {object} ext
-  	 * @returns {boolean}
-  	 */
-  	showdown.validateExtension = function (ext) {
+  const enhanceContext = (context, parentContext) => {
 
-  	  var validateExtension = validate(ext, null);
-  	  if (!validateExtension.valid) {
-  	    console.warn(validateExtension.error);
-  	    return false;
-  	  }
-  	  return true;
-  	};
-
-  	/**
-  	 * showdownjs helper functions
-  	 */
+    if (typeof(context) === 'object') {
+      return { this: context, parent: parentContext, ...context, _this_: context, _parent_: parentContext };
+    }
 
-  	if (!showdown.hasOwnProperty('helper')) {
-  	  showdown.helper = {};
-  	}
+    return { this: context, parent: parentContext, _this_: context, _parent_: parentContext };
 
-  	/**
-  	 * Check if var is string
-  	 * @static
-  	 * @param {string} a
-  	 * @returns {boolean}
-  	 */
-  	showdown.helper.isString = function (a) {
-  	  return (typeof a === 'string' || a instanceof String);
-  	};
+  };
 
-  	/**
-  	 * Check if var is a function
-  	 * @static
-  	 * @param {*} a
-  	 * @returns {boolean}
-  	 */
-  	showdown.helper.isFunction = function (a) {
-  	  var getType = {};
-  	  return a && getType.toString.call(a) === '[object Function]';
-  	};
+  /**
+   * Create warnings for empty inserts in the given tree.
+   *
+   * @param {Tree} syntaxTree
+   * @returns {LintMessage[]} array of syntax errors
+   */
+  function lintEmptyInserts(syntaxTree) {
 
-  	/**
-  	 * isArray helper function
-  	 * @static
-  	 * @param {*} a
-  	 * @returns {boolean}
-  	 */
-  	showdown.helper.isArray = function (a) {
-  	  return Array.isArray(a);
-  	};
+    const lintMessages = [];
 
-  	/**
-  	 * Check if value is undefined
-  	 * @static
-  	 * @param {*} value The value to check.
-  	 * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
-  	 */
-  	showdown.helper.isUndefined = function (value) {
-  	  return typeof value === 'undefined';
-  	};
+    syntaxTree.iterate({
+      enter: node => {
+        if (node.type.name === 'EmptyInsert') {
+          lintMessages.push(
+            {
+              from: node.from,
+              to: node.to,
+              severity: 'warning',
+              message: 'this insert is empty and will be ignored',
+              type: 'emptyInsert'
+            }
+          );
+        }
+      }
+    });
 
-  	/**
-  	 * ForEach helper function
-  	 * Iterates over Arrays and Objects (own properties only)
-  	 * @static
-  	 * @param {*} obj
-  	 * @param {function} callback Accepts 3 params: 1. value, 2. key, 3. the original array/object
-  	 */
-  	showdown.helper.forEach = function (obj, callback) {
-  	  // check if obj is defined
-  	  if (showdown.helper.isUndefined(obj)) {
-  	    throw new Error('obj param is required');
-  	  }
+    return lintMessages;
+  }
 
-  	  if (showdown.helper.isUndefined(callback)) {
-  	    throw new Error('callback param is required');
-  	  }
+  /**
+   * Generates lint messages for the given syntax tree.
+   *
+   * @param {Tree} syntaxTree
+   * @returns {LintMessage[]} array of all lint messages
+   */
+  function lintAll(syntaxTree) {
 
-  	  if (!showdown.helper.isFunction(callback)) {
-  	    throw new Error('callback param must be a function/closure');
-  	  }
+    const lintMessages = [
 
-  	  if (typeof obj.forEach === 'function') {
-  	    obj.forEach(callback);
-  	  } else if (showdown.helper.isArray(obj)) {
-  	    for (var i = 0; i < obj.length; i++) {
-  	      callback(obj[i], i, obj);
-  	    }
-  	  } else if (typeof (obj) === 'object') {
-  	    for (var prop in obj) {
-  	      if (obj.hasOwnProperty(prop)) {
-  	        callback(obj[prop], prop, obj);
-  	      }
-  	    }
-  	  } else {
-  	    throw new Error('obj does not seem to be an array or an iterable object');
-  	  }
-  	};
+      ...lintEmptyInserts(syntaxTree)
+    ];
 
-  	/**
-  	 * Standardidize extension name
-  	 * @static
-  	 * @param {string} s extension name
-  	 * @returns {string}
-  	 */
-  	showdown.helper.stdExtName = function (s) {
-  	  return s.replace(/[_?*+\/\\.^-]/g, '').replace(/\s/g, '').toLowerCase();
-  	};
+    return lintMessages;
+  }
 
-  	function escapeCharactersCallback (wholeMatch, m1) {
-  	  var charCodeToEscape = m1.charCodeAt(0);
-  	  return '¨E' + charCodeToEscape + 'E';
-  	}
 
-  	/**
-  	 * Callback used to escape characters when passing through String.replace
-  	 * @static
-  	 * @param {string} wholeMatch
-  	 * @param {string} m1
-  	 * @returns {string}
-  	 */
-  	showdown.helper.escapeCharactersCallback = escapeCharactersCallback;
+  /**
+   * CodeMirror extension that provides linting for FEEL expressions.
+   *
+   * @param {EditorView} editorView
+   * @returns {Source} CodeMirror linting source
+   */
+  function cmFeelersLinter() {
+    const lintFeel = cmFeelLinter();
+    return editorView => {
 
-  	/**
-  	 * Escape characters in a string
-  	 * @static
-  	 * @param {string} text
-  	 * @param {string} charsToEscape
-  	 * @param {boolean} afterBackslash
-  	 * @returns {XML|string|void|*}
-  	 */
-  	showdown.helper.escapeCharacters = function (text, charsToEscape, afterBackslash) {
-  	  // First we have to escape the escape characters so that
-  	  // we can build a character class out of them
-  	  var regexString = '([' + charsToEscape.replace(/([\[\]\\])/g, '\\$1') + '])';
+      const feelMessages = lintFeel(editorView);
 
-  	  if (afterBackslash) {
-  	    regexString = '\\\\' + regexString;
-  	  }
+      // don't lint if the Editor is empty
+      if (editorView.state.doc.length === 0) {
+        return [];
+      }
 
-  	  var regex = new RegExp(regexString, 'g');
-  	  text = text.replace(regex, escapeCharactersCallback);
+      const tree = syntaxTree(editorView.state);
 
-  	  return text;
-  	};
+      const feelersMessages = lintAll(tree);
 
-  	/**
-  	 * Unescape HTML entities
-  	 * @param txt
-  	 * @returns {string}
-  	 */
-  	showdown.helper.unescapeHTMLEntities = function (txt) {
+      return [
+        ...feelMessages,
+        ...feelersMessages.map(message => ({
+          ...message,
+          source: 'feelers linter'
+        }))
+      ];
+    };
+  }
 
-  	  return txt
-  	    .replace(/&quot;/g, '"')
-  	    .replace(/&lt;/g, '<')
-  	    .replace(/&gt;/g, '>')
-  	    .replace(/&amp;/g, '&');
-  	};
+  linter(cmFeelersLinter());
 
-  	var rgxFindMatchPos = function (str, left, right, flags) {
-  	  var f = flags || '',
-  	      g = f.indexOf('g') > -1,
-  	      x = new RegExp(left + '|' + right, 'g' + f.replace(/g/g, '')),
-  	      l = new RegExp(left, f.replace(/g/g, '')),
-  	      pos = [],
-  	      t, s, m, start, end;
+  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
 
-  	  do {
-  	    t = 0;
-  	    while ((m = x.exec(str))) {
-  	      if (l.test(m[0])) {
-  	        if (!(t++)) {
-  	          s = x.lastIndex;
-  	          start = s - m[0].length;
-  	        }
-  	      } else if (t) {
-  	        if (!--t) {
-  	          end = m.index + m[0].length;
-  	          var obj = {
-  	            left: {start: start, end: s},
-  	            match: {start: s, end: m.index},
-  	            right: {start: m.index, end: end},
-  	            wholeMatch: {start: start, end: end}
-  	          };
-  	          pos.push(obj);
-  	          if (!g) {
-  	            return pos;
-  	          }
-  	        }
-  	      }
-  	    }
-  	  } while (t && (x.lastIndex = s));
+  function getDefaultExportFromCjs (x) {
+  	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
+  }
 
-  	  return pos;
-  	};
+  var classnames = {exports: {}};
 
-  	/**
-  	 * matchRecursiveRegExp
-  	 *
-  	 * (c) 2007 Steven Levithan <stevenlevithan.com>
-  	 * MIT License
-  	 *
-  	 * Accepts a string to search, a left and right format delimiter
-  	 * as regex patterns, and optional regex flags. Returns an array
-  	 * of matches, allowing nested instances of left/right delimiters.
-  	 * Use the "g" flag to return all matches, otherwise only the
-  	 * first is returned. Be careful to ensure that the left and
-  	 * right format delimiters produce mutually exclusive matches.
-  	 * Backreferences are not supported within the right delimiter
-  	 * due to how it is internally combined with the left delimiter.
-  	 * When matching strings whose format delimiters are unbalanced
-  	 * to the left or right, the output is intentionally as a
-  	 * conventional regex library with recursion support would
-  	 * produce, e.g. "<<x>" and "<x>>" both produce ["x"] when using
-  	 * "<" and ">" as the delimiters (both strings contain a single,
-  	 * balanced instance of "<x>").
-  	 *
-  	 * examples:
-  	 * matchRecursiveRegExp("test", "\\(", "\\)")
-  	 * returns: []
-  	 * matchRecursiveRegExp("<t<<e>><s>>t<>", "<", ">", "g")
-  	 * returns: ["t<<e>><s>", ""]
-  	 * matchRecursiveRegExp("<div id=\"x\">test</div>", "<div\\b[^>]*>", "</div>", "gi")
-  	 * returns: ["test"]
-  	 */
-  	showdown.helper.matchRecursiveRegExp = function (str, left, right, flags) {
+  /*!
+  	Copyright (c) 2018 Jed Watson.
+  	Licensed under the MIT License (MIT), see
+  	http://jedwatson.github.io/classnames
+  */
 
-  	  var matchPos = rgxFindMatchPos (str, left, right, flags),
-  	      results = [];
+  (function (module) {
+  	/* global define */
 
-  	  for (var i = 0; i < matchPos.length; ++i) {
-  	    results.push([
-  	      str.slice(matchPos[i].wholeMatch.start, matchPos[i].wholeMatch.end),
-  	      str.slice(matchPos[i].match.start, matchPos[i].match.end),
-  	      str.slice(matchPos[i].left.start, matchPos[i].left.end),
-  	      str.slice(matchPos[i].right.start, matchPos[i].right.end)
-  	    ]);
-  	  }
-  	  return results;
-  	};
+  	(function () {
 
-  	/**
-  	 *
-  	 * @param {string} str
-  	 * @param {string|function} replacement
-  	 * @param {string} left
-  	 * @param {string} right
-  	 * @param {string} flags
-  	 * @returns {string}
-  	 */
-  	showdown.helper.replaceRecursiveRegExp = function (str, replacement, left, right, flags) {
+  		var hasOwn = {}.hasOwnProperty;
 
-  	  if (!showdown.helper.isFunction(replacement)) {
-  	    var repStr = replacement;
-  	    replacement = function () {
-  	      return repStr;
-  	    };
-  	  }
+  		function classNames() {
+  			var classes = [];
 
-  	  var matchPos = rgxFindMatchPos(str, left, right, flags),
-  	      finalStr = str,
-  	      lng = matchPos.length;
+  			for (var i = 0; i < arguments.length; i++) {
+  				var arg = arguments[i];
+  				if (!arg) continue;
 
-  	  if (lng > 0) {
-  	    var bits = [];
-  	    if (matchPos[0].wholeMatch.start !== 0) {
-  	      bits.push(str.slice(0, matchPos[0].wholeMatch.start));
-  	    }
-  	    for (var i = 0; i < lng; ++i) {
-  	      bits.push(
-  	        replacement(
-  	          str.slice(matchPos[i].wholeMatch.start, matchPos[i].wholeMatch.end),
-  	          str.slice(matchPos[i].match.start, matchPos[i].match.end),
-  	          str.slice(matchPos[i].left.start, matchPos[i].left.end),
-  	          str.slice(matchPos[i].right.start, matchPos[i].right.end)
-  	        )
-  	      );
-  	      if (i < lng - 1) {
-  	        bits.push(str.slice(matchPos[i].wholeMatch.end, matchPos[i + 1].wholeMatch.start));
-  	      }
-  	    }
-  	    if (matchPos[lng - 1].wholeMatch.end < str.length) {
-  	      bits.push(str.slice(matchPos[lng - 1].wholeMatch.end));
-  	    }
-  	    finalStr = bits.join('');
-  	  }
-  	  return finalStr;
-  	};
+  				var argType = typeof arg;
 
-  	/**
-  	 * Returns the index within the passed String object of the first occurrence of the specified regex,
-  	 * starting the search at fromIndex. Returns -1 if the value is not found.
-  	 *
-  	 * @param {string} str string to search
-  	 * @param {RegExp} regex Regular expression to search
-  	 * @param {int} [fromIndex = 0] Index to start the search
-  	 * @returns {Number}
-  	 * @throws InvalidArgumentError
-  	 */
-  	showdown.helper.regexIndexOf = function (str, regex, fromIndex) {
-  	  if (!showdown.helper.isString(str)) {
-  	    throw 'InvalidArgumentError: first parameter of showdown.helper.regexIndexOf function must be a string';
-  	  }
-  	  if (regex instanceof RegExp === false) {
-  	    throw 'InvalidArgumentError: second parameter of showdown.helper.regexIndexOf function must be an instance of RegExp';
-  	  }
-  	  var indexOf = str.substring(fromIndex || 0).search(regex);
-  	  return (indexOf >= 0) ? (indexOf + (fromIndex || 0)) : indexOf;
-  	};
+  				if (argType === 'string' || argType === 'number') {
+  					classes.push(arg);
+  				} else if (Array.isArray(arg)) {
+  					if (arg.length) {
+  						var inner = classNames.apply(null, arg);
+  						if (inner) {
+  							classes.push(inner);
+  						}
+  					}
+  				} else if (argType === 'object') {
+  					if (arg.toString !== Object.prototype.toString && !arg.toString.toString().includes('[native code]')) {
+  						classes.push(arg.toString());
+  						continue;
+  					}
 
-  	/**
-  	 * Splits the passed string object at the defined index, and returns an array composed of the two substrings
-  	 * @param {string} str string to split
-  	 * @param {int} index index to split string at
-  	 * @returns {[string,string]}
-  	 * @throws InvalidArgumentError
-  	 */
-  	showdown.helper.splitAtIndex = function (str, index) {
-  	  if (!showdown.helper.isString(str)) {
-  	    throw 'InvalidArgumentError: first parameter of showdown.helper.regexIndexOf function must be a string';
-  	  }
-  	  return [str.substring(0, index), str.substring(index)];
-  	};
+  					for (var key in arg) {
+  						if (hasOwn.call(arg, key) && arg[key]) {
+  							classes.push(key);
+  						}
+  					}
+  				}
+  			}
 
-  	/**
-  	 * Obfuscate an e-mail address through the use of Character Entities,
-  	 * transforming ASCII characters into their equivalent decimal or hex entities.
-  	 *
-  	 * Since it has a random component, subsequent calls to this function produce different results
-  	 *
-  	 * @param {string} mail
-  	 * @returns {string}
-  	 */
-  	showdown.helper.encodeEmailAddress = function (mail) {
-  	  var encode = [
-  	    function (ch) {
-  	      return '&#' + ch.charCodeAt(0) + ';';
-  	    },
-  	    function (ch) {
-  	      return '&#x' + ch.charCodeAt(0).toString(16) + ';';
-  	    },
-  	    function (ch) {
-  	      return ch;
-  	    }
-  	  ];
+  			return classes.join(' ');
+  		}
 
-  	  mail = mail.replace(/./g, function (ch) {
-  	    if (ch === '@') {
-  	      // this *must* be encoded. I insist.
-  	      ch = encode[Math.floor(Math.random() * 2)](ch);
-  	    } else {
-  	      var r = Math.random();
-  	      // roughly 10% raw, 45% hex, 45% dec
-  	      ch = (
-  	        r > 0.9 ? encode[2](ch) : r > 0.45 ? encode[1](ch) : encode[0](ch)
-  	      );
-  	    }
-  	    return ch;
-  	  });
+  		if (module.exports) {
+  			classNames.default = classNames;
+  			module.exports = classNames;
+  		} else {
+  			window.classNames = classNames;
+  		}
+  	}()); 
+  } (classnames));
 
-  	  return mail;
-  	};
+  var classnamesExports = classnames.exports;
+  var classNames = /*@__PURE__*/getDefaultExportFromCjs(classnamesExports);
 
-  	/**
-  	 *
-  	 * @param str
-  	 * @param targetLength
-  	 * @param padString
-  	 * @returns {string}
-  	 */
-  	showdown.helper.padEnd = function padEnd (str, targetLength, padString) {
-  	  /*jshint bitwise: false*/
-  	  // eslint-disable-next-line space-infix-ops
-  	  targetLength = targetLength>>0; //floor if number or convert non-number to 0;
-  	  /*jshint bitwise: true*/
-  	  padString = String(padString || ' ');
-  	  if (str.length > targetLength) {
-  	    return String(str);
-  	  } else {
-  	    targetLength = targetLength - str.length;
-  	    if (targetLength > padString.length) {
-  	      padString += padString.repeat(targetLength / padString.length); //append to original to ensure we are longer than needed
-  	    }
-  	    return String(str) + padString.slice(0,targetLength);
-  	  }
-  	};
+  var n$1,l$2,u$1,t$1,o$3,r$1,f$1,e$3={},c$1=[],s$1=/acit|ex(?:s|g|n|p|$)|rph|grid|ows|mnc|ntw|ine[ch]|zoo|^ord|itera/i;function a$2(n,l){for(var u in l)n[u]=l[u];return n}function h$1(n){var l=n.parentNode;l&&l.removeChild(n);}function v$1(l,u,i){var t,o,r,f={};for(r in u)"key"==r?t=u[r]:"ref"==r?o=u[r]:f[r]=u[r];if(arguments.length>2&&(f.children=arguments.length>3?n$1.call(arguments,2):i),"function"==typeof l&&null!=l.defaultProps)for(r in l.defaultProps)void 0===f[r]&&(f[r]=l.defaultProps[r]);return y$1(l,f,t,o,null)}function y$1(n,i,t,o,r){var f={type:n,props:i,key:t,ref:o,__k:null,__:null,__b:0,__e:null,__d:void 0,__c:null,__h:null,constructor:void 0,__v:null==r?++u$1:r};return null!=l$2.vnode&&l$2.vnode(f),f}function d$1(n){return n.children}function _(n,l){this.props=n,this.context=l;}function k$1(n,l){if(null==l)return n.__?k$1(n.__,n.__.__k.indexOf(n)+1):null;for(var u;l<n.__k.length;l++)if(null!=(u=n.__k[l])&&null!=u.__e)return u.__e;return "function"==typeof 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-  	/**
-  	 * POLYFILLS
-  	 */
-  	// use this instead of builtin is undefined for IE8 compatibility
-  	if (typeof (console) === 'undefined') {
-  	  console = {
-  	    warn: function (msg) {
-  	      alert(msg);
-  	    },
-  	    log: function (msg) {
-  	      alert(msg);
-  	    },
-  	    error: function (msg) {
-  	      throw msg;
-  	    }
-  	  };
-  	}
+  var o$2=0;function e$2(_,e,n,t,f){var l,s,u={};for(s in e)"ref"==s?l=e[s]:u[s]=e[s];var a={type:_,props:u,key:n,ref:l,__k:null,__:null,__b:0,__e:null,__d:void 0,__c:null,__h:null,constructor:void 0,__v:--o$2,__source:t,__self:f};if("function"==typeof _&&(l=_.defaultProps))for(s in l)void 0===u[s]&&(u[s]=l[s]);return l$2.vnode&&l$2.vnode(a),a}
 
-  	/**
-  	 * Common regexes.
-  	 * We declare some common regexes to improve performance
-  	 */
-  	showdown.helper.regexes = {
-  	  asteriskDashAndColon: /([*_:~])/g
-  	};
-
-  	/**
-  	 * EMOJIS LIST
-  	 */
-  	showdown.helper.emojis = {
-  	  '+1':'\ud83d\udc4d',
-  	  '-1':'\ud83d\udc4e',
-  	  '100':'\ud83d\udcaf',
-  	  '1234':'\ud83d\udd22',
-  	  '1st_place_medal':'\ud83e\udd47',
-  	  '2nd_place_medal':'\ud83e\udd48',
-  	  '3rd_place_medal':'\ud83e\udd49',
-  	  '8ball':'\ud83c\udfb1',
-  	  'a':'\ud83c\udd70\ufe0f',
-  	  'ab':'\ud83c\udd8e',
-  	  'abc':'\ud83d\udd24',
-  	  'abcd':'\ud83d\udd21',
-  	  'accept':'\ud83c\ude51',
-  	  'aerial_tramway':'\ud83d\udea1',
-  	  'airplane':'\u2708\ufe0f',
-  	  'alarm_clock':'\u23f0',
-  	  'alembic':'\u2697\ufe0f',
-  	  'alien':'\ud83d\udc7d',
-  	  'ambulance':'\ud83d\ude91',
-  	  'amphora':'\ud83c\udffa',
-  	  'anchor':'\u2693\ufe0f',
-  	  'angel':'\ud83d\udc7c',
-  	  'anger':'\ud83d\udca2',
-  	  'angry':'\ud83d\ude20',
-  	  'anguished':'\ud83d\ude27',
-  	  'ant':'\ud83d\udc1c',
-  	  'apple':'\ud83c\udf4e',
-  	  'aquarius':'\u2652\ufe0f',
-  	  'aries':'\u2648\ufe0f',
-  	  'arrow_backward':'\u25c0\ufe0f',
-  	  'arrow_double_down':'\u23ec',
-  	  'arrow_double_up':'\u23eb',
-  	  'arrow_down':'\u2b07\ufe0f',
-  	  'arrow_down_small':'\ud83d\udd3d',
-  	  'arrow_forward':'\u25b6\ufe0f',
-  	  'arrow_heading_down':'\u2935\ufe0f',
-  	  'arrow_heading_up':'\u2934\ufe0f',
-  	  'arrow_left':'\u2b05\ufe0f',
-  	  'arrow_lower_left':'\u2199\ufe0f',
-  	  'arrow_lower_right':'\u2198\ufe0f',
-  	  'arrow_right':'\u27a1\ufe0f',
-  	  'arrow_right_hook':'\u21aa\ufe0f',
-  	  'arrow_up':'\u2b06\ufe0f',
-  	  'arrow_up_down':'\u2195\ufe0f',
-  	  'arrow_up_small':'\ud83d\udd3c',
-  	  'arrow_upper_left':'\u2196\ufe0f',
-  	  'arrow_upper_right':'\u2197\ufe0f',
-  	  'arrows_clockwise':'\ud83d\udd03',
-  	  'arrows_counterclockwise':'\ud83d\udd04',
-  	  'art':'\ud83c\udfa8',
-  	  'articulated_lorry':'\ud83d\ude9b',
-  	  'artificial_satellite':'\ud83d\udef0',
-  	  'astonished':'\ud83d\ude32',
-  	  'athletic_shoe':'\ud83d\udc5f',
-  	  'atm':'\ud83c\udfe7',
-  	  'atom_symbol':'\u269b\ufe0f',
-  	  'avocado':'\ud83e\udd51',
-  	  'b':'\ud83c\udd71\ufe0f',
-  	  'baby':'\ud83d\udc76',
-  	  'baby_bottle':'\ud83c\udf7c',
-  	  'baby_chick':'\ud83d\udc24',
-  	  'baby_symbol':'\ud83d\udebc',
-  	  'back':'\ud83d\udd19',
-  	  'bacon':'\ud83e\udd53',
-  	  'badminton':'\ud83c\udff8',
-  	  'baggage_claim':'\ud83d\udec4',
-  	  'baguette_bread':'\ud83e\udd56',
-  	  'balance_scale':'\u2696\ufe0f',
-  	  'balloon':'\ud83c\udf88',
-  	  'ballot_box':'\ud83d\uddf3',
-  	  'ballot_box_with_check':'\u2611\ufe0f',
-  	  'bamboo':'\ud83c\udf8d',
-  	  'banana':'\ud83c\udf4c',
-  	  'bangbang':'\u203c\ufe0f',
-  	  'bank':'\ud83c\udfe6',
-  	  'bar_chart':'\ud83d\udcca',
-  	  'barber':'\ud83d\udc88',
-  	  'baseball':'\u26be\ufe0f',
-  	  'basketball':'\ud83c\udfc0',
-  	  'basketball_man':'\u26f9\ufe0f',
-  	  'basketball_woman':'\u26f9\ufe0f&zwj;\u2640\ufe0f',
-  	  'bat':'\ud83e\udd87',
-  	  'bath':'\ud83d\udec0',
-  	  'bathtub':'\ud83d\udec1',
-  	  'battery':'\ud83d\udd0b',
-  	  'beach_umbrella':'\ud83c\udfd6',
-  	  'bear':'\ud83d\udc3b',
-  	  'bed':'\ud83d\udecf',
-  	  'bee':'\ud83d\udc1d',
-  	  'beer':'\ud83c\udf7a',
-  	  'beers':'\ud83c\udf7b',
-  	  'beetle':'\ud83d\udc1e',
-  	  'beginner':'\ud83d\udd30',
-  	  'bell':'\ud83d\udd14',
-  	  'bellhop_bell':'\ud83d\udece',
-  	  'bento':'\ud83c\udf71',
-  	  'biking_man':'\ud83d\udeb4',
-  	  'bike':'\ud83d\udeb2',
-  	  'biking_woman':'\ud83d\udeb4&zwj;\u2640\ufe0f',
-  	  'bikini':'\ud83d\udc59',
-  	  'biohazard':'\u2623\ufe0f',
-  	  'bird':'\ud83d\udc26',
-  	  'birthday':'\ud83c\udf82',
-  	  'black_circle':'\u26ab\ufe0f',
-  	  'black_flag':'\ud83c\udff4',
-  	  'black_heart':'\ud83d\udda4',
-  	  'black_joker':'\ud83c\udccf',
-  	  'black_large_square':'\u2b1b\ufe0f',
-  	  'black_medium_small_square':'\u25fe\ufe0f',
-  	  'black_medium_square':'\u25fc\ufe0f',
-  	  'black_nib':'\u2712\ufe0f',
-  	  'black_small_square':'\u25aa\ufe0f',
-  	  'black_square_button':'\ud83d\udd32',
-  	  'blonde_man':'\ud83d\udc71',
-  	  'blonde_woman':'\ud83d\udc71&zwj;\u2640\ufe0f',
-  	  'blossom':'\ud83c\udf3c',
-  	  'blowfish':'\ud83d\udc21',
-  	  'blue_book':'\ud83d\udcd8',
-  	  'blue_car':'\ud83d\ude99',
-  	  'blue_heart':'\ud83d\udc99',
-  	  'blush':'\ud83d\ude0a',
-  	  'boar':'\ud83d\udc17',
-  	  'boat':'\u26f5\ufe0f',
-  	  'bomb':'\ud83d\udca3',
-  	  'book':'\ud83d\udcd6',
-  	  'bookmark':'\ud83d\udd16',
-  	  'bookmark_tabs':'\ud83d\udcd1',
-  	  'books':'\ud83d\udcda',
-  	  'boom':'\ud83d\udca5',
-  	  'boot':'\ud83d\udc62',
-  	  'bouquet':'\ud83d\udc90',
-  	  'bowing_man':'\ud83d\ude47',
-  	  'bow_and_arrow':'\ud83c\udff9',
-  	  'bowing_woman':'\ud83d\ude47&zwj;\u2640\ufe0f',
-  	  'bowling':'\ud83c\udfb3',
-  	  'boxing_glove':'\ud83e\udd4a',
-  	  'boy':'\ud83d\udc66',
-  	  'bread':'\ud83c\udf5e',
-  	  'bride_with_veil':'\ud83d\udc70',
-  	  'bridge_at_night':'\ud83c\udf09',
-  	  'briefcase':'\ud83d\udcbc',
-  	  'broken_heart':'\ud83d\udc94',
-  	  'bug':'\ud83d\udc1b',
-  	  'building_construction':'\ud83c\udfd7',
-  	  'bulb':'\ud83d\udca1',
-  	  'bullettrain_front':'\ud83d\ude85',
-  	  'bullettrain_side':'\ud83d\ude84',
-  	  'burrito':'\ud83c\udf2f',
-  	  'bus':'\ud83d\ude8c',
-  	  'business_suit_levitating':'\ud83d\udd74',
-  	  'busstop':'\ud83d\ude8f',
-  	  'bust_in_silhouette':'\ud83d\udc64',
-  	  'busts_in_silhouette':'\ud83d\udc65',
-  	  'butterfly':'\ud83e\udd8b',
-  	  'cactus':'\ud83c\udf35',
-  	  'cake':'\ud83c\udf70',
-  	  'calendar':'\ud83d\udcc6',
-  	  'call_me_hand':'\ud83e\udd19',
-  	  'calling':'\ud83d\udcf2',
-  	  'camel':'\ud83d\udc2b',
-  	  'camera':'\ud83d\udcf7',
-  	  'camera_flash':'\ud83d\udcf8',
-  	  'camping':'\ud83c\udfd5',
-  	  'cancer':'\u264b\ufe0f',
-  	  'candle':'\ud83d\udd6f',
-  	  'candy':'\ud83c\udf6c',
-  	  'canoe':'\ud83d\udef6',
-  	  'capital_abcd':'\ud83d\udd20',
-  	  'capricorn':'\u2651\ufe0f',
-  	  'car':'\ud83d\ude97',
-  	  'card_file_box':'\ud83d\uddc3',
-  	  'card_index':'\ud83d\udcc7',
-  	  'card_index_dividers':'\ud83d\uddc2',
-  	  'carousel_horse':'\ud83c\udfa0',
-  	  'carrot':'\ud83e\udd55',
-  	  'cat':'\ud83d\udc31',
-  	  'cat2':'\ud83d\udc08',
-  	  'cd':'\ud83d\udcbf',
-  	  'chains':'\u26d3',
-  	  'champagne':'\ud83c\udf7e',
-  	  'chart':'\ud83d\udcb9',
-  	  'chart_with_downwards_trend':'\ud83d\udcc9',
-  	  'chart_with_upwards_trend':'\ud83d\udcc8',
-  	  'checkered_flag':'\ud83c\udfc1',
-  	  'cheese':'\ud83e\uddc0',
-  	  'cherries':'\ud83c\udf52',
-  	  'cherry_blossom':'\ud83c\udf38',
-  	  'chestnut':'\ud83c\udf30',
-  	  'chicken':'\ud83d\udc14',
-  	  'children_crossing':'\ud83d\udeb8',
-  	  'chipmunk':'\ud83d\udc3f',
-  	  'chocolate_bar':'\ud83c\udf6b',
-  	  'christmas_tree':'\ud83c\udf84',
-  	  'church':'\u26ea\ufe0f',
-  	  'cinema':'\ud83c\udfa6',
-  	  'circus_tent':'\ud83c\udfaa',
-  	  'city_sunrise':'\ud83c\udf07',
-  	  'city_sunset':'\ud83c\udf06',
-  	  'cityscape':'\ud83c\udfd9',
-  	  'cl':'\ud83c\udd91',
-  	  'clamp':'\ud83d\udddc',
-  	  'clap':'\ud83d\udc4f',
-  	  'clapper':'\ud83c\udfac',
-  	  'classical_building':'\ud83c\udfdb',
-  	  'clinking_glasses':'\ud83e\udd42',
-  	  'clipboard':'\ud83d\udccb',
-  	  'clock1':'\ud83d\udd50',
-  	  'clock10':'\ud83d\udd59',
-  	  'clock1030':'\ud83d\udd65',
-  	  'clock11':'\ud83d\udd5a',
-  	  'clock1130':'\ud83d\udd66',
-  	  'clock12':'\ud83d\udd5b',
-  	  'clock1230':'\ud83d\udd67',
-  	  'clock130':'\ud83d\udd5c',
-  	  'clock2':'\ud83d\udd51',
-  	  'clock230':'\ud83d\udd5d',
-  	  'clock3':'\ud83d\udd52',
-  	  'clock330':'\ud83d\udd5e',
-  	  'clock4':'\ud83d\udd53',
-  	  'clock430':'\ud83d\udd5f',
-  	  'clock5':'\ud83d\udd54',
-  	  'clock530':'\ud83d\udd60',
-  	  'clock6':'\ud83d\udd55',
-  	  'clock630':'\ud83d\udd61',
-  	  'clock7':'\ud83d\udd56',
-  	  'clock730':'\ud83d\udd62',
-  	  'clock8':'\ud83d\udd57',
-  	  'clock830':'\ud83d\udd63',
-  	  'clock9':'\ud83d\udd58',
-  	  'clock930':'\ud83d\udd64',
-  	  'closed_book':'\ud83d\udcd5',
-  	  'closed_lock_with_key':'\ud83d\udd10',
-  	  'closed_umbrella':'\ud83c\udf02',
-  	  'cloud':'\u2601\ufe0f',
-  	  'cloud_with_lightning':'\ud83c\udf29',
-  	  'cloud_with_lightning_and_rain':'\u26c8',
-  	  'cloud_with_rain':'\ud83c\udf27',
-  	  'cloud_with_snow':'\ud83c\udf28',
-  	  'clown_face':'\ud83e\udd21',
-  	  'clubs':'\u2663\ufe0f',
-  	  'cocktail':'\ud83c\udf78',
-  	  'coffee':'\u2615\ufe0f',
-  	  'coffin':'\u26b0\ufe0f',
-  	  'cold_sweat':'\ud83d\ude30',
-  	  'comet':'\u2604\ufe0f',
-  	  'computer':'\ud83d\udcbb',
-  	  'computer_mouse':'\ud83d\uddb1',
-  	  'confetti_ball':'\ud83c\udf8a',
-  	  'confounded':'\ud83d\ude16',
-  	  'confused':'\ud83d\ude15',
-  	  'congratulations':'\u3297\ufe0f',
-  	  'construction':'\ud83d\udea7',
-  	  'construction_worker_man':'\ud83d\udc77',
-  	  'construction_worker_woman':'\ud83d\udc77&zwj;\u2640\ufe0f',
-  	  'control_knobs':'\ud83c\udf9b',
-  	  'convenience_store':'\ud83c\udfea',
-  	  'cookie':'\ud83c\udf6a',
-  	  'cool':'\ud83c\udd92',
-  	  'policeman':'\ud83d\udc6e',
-  	  'copyright':'\u00a9\ufe0f',
-  	  'corn':'\ud83c\udf3d',
-  	  'couch_and_lamp':'\ud83d\udecb',
-  	  'couple':'\ud83d\udc6b',
-  	  'couple_with_heart_woman_man':'\ud83d\udc91',
-  	  'couple_with_heart_man_man':'\ud83d\udc68&zwj;\u2764\ufe0f&zwj;\ud83d\udc68',
-  	  'couple_with_heart_woman_woman':'\ud83d\udc69&zwj;\u2764\ufe0f&zwj;\ud83d\udc69',
-  	  'couplekiss_man_man':'\ud83d\udc68&zwj;\u2764\ufe0f&zwj;\ud83d\udc8b&zwj;\ud83d\udc68',
-  	  'couplekiss_man_woman':'\ud83d\udc8f',
-  	  'couplekiss_woman_woman':'\ud83d\udc69&zwj;\u2764\ufe0f&zwj;\ud83d\udc8b&zwj;\ud83d\udc69',
-  	  'cow':'\ud83d\udc2e',
-  	  'cow2':'\ud83d\udc04',
-  	  'cowboy_hat_face':'\ud83e\udd20',
-  	  'crab':'\ud83e\udd80',
-  	  'crayon':'\ud83d\udd8d',
-  	  'credit_card':'\ud83d\udcb3',
-  	  'crescent_moon':'\ud83c\udf19',
-  	  'cricket':'\ud83c\udfcf',
-  	  'crocodile':'\ud83d\udc0a',
-  	  'croissant':'\ud83e\udd50',
-  	  'crossed_fingers':'\ud83e\udd1e',
-  	  'crossed_flags':'\ud83c\udf8c',
-  	  'crossed_swords':'\u2694\ufe0f',
-  	  'crown':'\ud83d\udc51',
-  	  'cry':'\ud83d\ude22',
-  	  'crying_cat_face':'\ud83d\ude3f',
-  	  'crystal_ball':'\ud83d\udd2e',
-  	  'cucumber':'\ud83e\udd52',
-  	  'cupid':'\ud83d\udc98',
-  	  'curly_loop':'\u27b0',
-  	  'currency_exchange':'\ud83d\udcb1',
-  	  'curry':'\ud83c\udf5b',
-  	  'custard':'\ud83c\udf6e',
-  	  'customs':'\ud83d\udec3',
-  	  'cyclone':'\ud83c\udf00',
-  	  'dagger':'\ud83d\udde1',
-  	  'dancer':'\ud83d\udc83',
-  	  'dancing_women':'\ud83d\udc6f',
-  	  'dancing_men':'\ud83d\udc6f&zwj;\u2642\ufe0f',
-  	  'dango':'\ud83c\udf61',
-  	  'dark_sunglasses':'\ud83d\udd76',
-  	  'dart':'\ud83c\udfaf',
-  	  'dash':'\ud83d\udca8',
-  	  'date':'\ud83d\udcc5',
-  	  'deciduous_tree':'\ud83c\udf33',
-  	  'deer':'\ud83e\udd8c',
-  	  'department_store':'\ud83c\udfec',
-  	  'derelict_house':'\ud83c\udfda',
-  	  'desert':'\ud83c\udfdc',
-  	  'desert_island':'\ud83c\udfdd',
-  	  'desktop_computer':'\ud83d\udda5',
-  	  'male_detective':'\ud83d\udd75\ufe0f',
-  	  'diamond_shape_with_a_dot_inside':'\ud83d\udca0',
-  	  'diamonds':'\u2666\ufe0f',
-  	  'disappointed':'\ud83d\ude1e',
-  	  'disappointed_relieved':'\ud83d\ude25',
-  	  'dizzy':'\ud83d\udcab',
-  	  'dizzy_face':'\ud83d\ude35',
-  	  'do_not_litter':'\ud83d\udeaf',
-  	  'dog':'\ud83d\udc36',
-  	  'dog2':'\ud83d\udc15',
-  	  'dollar':'\ud83d\udcb5',
-  	  'dolls':'\ud83c\udf8e',
-  	  'dolphin':'\ud83d\udc2c',
-  	  'door':'\ud83d\udeaa',
-  	  'doughnut':'\ud83c\udf69',
-  	  'dove':'\ud83d\udd4a',
-  	  'dragon':'\ud83d\udc09',
-  	  'dragon_face':'\ud83d\udc32',
-  	  'dress':'\ud83d\udc57',
-  	  'dromedary_camel':'\ud83d\udc2a',
-  	  'drooling_face':'\ud83e\udd24',
-  	  'droplet':'\ud83d\udca7',
-  	  'drum':'\ud83e\udd41',
-  	  'duck':'\ud83e\udd86',
-  	  'dvd':'\ud83d\udcc0',
-  	  'e-mail':'\ud83d\udce7',
-  	  'eagle':'\ud83e\udd85',
-  	  'ear':'\ud83d\udc42',
-  	  'ear_of_rice':'\ud83c\udf3e',
-  	  'earth_africa':'\ud83c\udf0d',
-  	  'earth_americas':'\ud83c\udf0e',
-  	  'earth_asia':'\ud83c\udf0f',
-  	  'egg':'\ud83e\udd5a',
-  	  'eggplant':'\ud83c\udf46',
-  	  'eight_pointed_black_star':'\u2734\ufe0f',
-  	  'eight_spoked_asterisk':'\u2733\ufe0f',
-  	  'electric_plug':'\ud83d\udd0c',
-  	  'elephant':'\ud83d\udc18',
-  	  'email':'\u2709\ufe0f',
-  	  'end':'\ud83d\udd1a',
-  	  'envelope_with_arrow':'\ud83d\udce9',
-  	  'euro':'\ud83d\udcb6',
-  	  'european_castle':'\ud83c\udff0',
-  	  'european_post_office':'\ud83c\udfe4',
-  	  'evergreen_tree':'\ud83c\udf32',
-  	  'exclamation':'\u2757\ufe0f',
-  	  'expressionless':'\ud83d\ude11',
-  	  'eye':'\ud83d\udc41',
-  	  'eye_speech_bubble':'\ud83d\udc41&zwj;\ud83d\udde8',
-  	  'eyeglasses':'\ud83d\udc53',
-  	  'eyes':'\ud83d\udc40',
-  	  'face_with_head_bandage':'\ud83e\udd15',
-  	  'face_with_thermometer':'\ud83e\udd12',
-  	  'fist_oncoming':'\ud83d\udc4a',
-  	  'factory':'\ud83c\udfed',
-  	  'fallen_leaf':'\ud83c\udf42',
-  	  'family_man_woman_boy':'\ud83d\udc6a',
-  	  'family_man_boy':'\ud83d\udc68&zwj;\ud83d\udc66',
-  	  'family_man_boy_boy':'\ud83d\udc68&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
-  	  'family_man_girl':'\ud83d\udc68&zwj;\ud83d\udc67',
-  	  'family_man_girl_boy':'\ud83d\udc68&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
-  	  'family_man_girl_girl':'\ud83d\udc68&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
-  	  'family_man_man_boy':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc66',
-  	  'family_man_man_boy_boy':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
-  	  'family_man_man_girl':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc67',
-  	  'family_man_man_girl_boy':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
-  	  'family_man_man_girl_girl':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
-  	  'family_man_woman_boy_boy':'\ud83d\udc68&zwj;\ud83d\udc69&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
-  	  'family_man_woman_girl':'\ud83d\udc68&zwj;\ud83d\udc69&zwj;\ud83d\udc67',
-  	  'family_man_woman_girl_boy':'\ud83d\udc68&zwj;\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
-  	  'family_man_woman_girl_girl':'\ud83d\udc68&zwj;\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
-  	  'family_woman_boy':'\ud83d\udc69&zwj;\ud83d\udc66',
-  	  'family_woman_boy_boy':'\ud83d\udc69&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
-  	  'family_woman_girl':'\ud83d\udc69&zwj;\ud83d\udc67',
-  	  'family_woman_girl_boy':'\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
-  	  'family_woman_girl_girl':'\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
-  	  'family_woman_woman_boy':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc66',
-  	  'family_woman_woman_boy_boy':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
-  	  'family_woman_woman_girl':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc67',
-  	  'family_woman_woman_girl_boy':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
-  	  'family_woman_woman_girl_girl':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
-  	  'fast_forward':'\u23e9',
-  	  'fax':'\ud83d\udce0',
-  	  'fearful':'\ud83d\ude28',
-  	  'feet':'\ud83d\udc3e',
-  	  'female_detective':'\ud83d\udd75\ufe0f&zwj;\u2640\ufe0f',
-  	  'ferris_wheel':'\ud83c\udfa1',
-  	  'ferry':'\u26f4',
-  	  'field_hockey':'\ud83c\udfd1',
-  	  'file_cabinet':'\ud83d\uddc4',
-  	  'file_folder':'\ud83d\udcc1',
-  	  'film_projector':'\ud83d\udcfd',
-  	  'film_strip':'\ud83c\udf9e',
-  	  'fire':'\ud83d\udd25',
-  	  'fire_engine':'\ud83d\ude92',
-  	  'fireworks':'\ud83c\udf86',
-  	  'first_quarter_moon':'\ud83c\udf13',
-  	  'first_quarter_moon_with_face':'\ud83c\udf1b',
-  	  'fish':'\ud83d\udc1f',
-  	  'fish_cake':'\ud83c\udf65',
-  	  'fishing_pole_and_fish':'\ud83c\udfa3',
-  	  'fist_raised':'\u270a',
-  	  'fist_left':'\ud83e\udd1b',
-  	  'fist_right':'\ud83e\udd1c',
-  	  'flags':'\ud83c\udf8f',
-  	  'flashlight':'\ud83d\udd26',
-  	  'fleur_de_lis':'\u269c\ufe0f',
-  	  'flight_arrival':'\ud83d\udeec',
-  	  'flight_departure':'\ud83d\udeeb',
-  	  'floppy_disk':'\ud83d\udcbe',
-  	  'flower_playing_cards':'\ud83c\udfb4',
-  	  'flushed':'\ud83d\ude33',
-  	  'fog':'\ud83c\udf2b',
-  	  'foggy':'\ud83c\udf01',
-  	  'football':'\ud83c\udfc8',
-  	  'footprints':'\ud83d\udc63',
-  	  'fork_and_knife':'\ud83c\udf74',
-  	  'fountain':'\u26f2\ufe0f',
-  	  'fountain_pen':'\ud83d\udd8b',
-  	  'four_leaf_clover':'\ud83c\udf40',
-  	  'fox_face':'\ud83e\udd8a',
-  	  'framed_picture':'\ud83d\uddbc',
-  	  'free':'\ud83c\udd93',
-  	  'fried_egg':'\ud83c\udf73',
-  	  'fried_shrimp':'\ud83c\udf64',
-  	  'fries':'\ud83c\udf5f',
-  	  'frog':'\ud83d\udc38',
-  	  'frowning':'\ud83d\ude26',
-  	  'frowning_face':'\u2639\ufe0f',
-  	  'frowning_man':'\ud83d\ude4d&zwj;\u2642\ufe0f',
-  	  'frowning_woman':'\ud83d\ude4d',
-  	  'middle_finger':'\ud83d\udd95',
-  	  'fuelpump':'\u26fd\ufe0f',
-  	  'full_moon':'\ud83c\udf15',
-  	  'full_moon_with_face':'\ud83c\udf1d',
-  	  'funeral_urn':'\u26b1\ufe0f',
-  	  'game_die':'\ud83c\udfb2',
-  	  'gear':'\u2699\ufe0f',
-  	  'gem':'\ud83d\udc8e',
-  	  'gemini':'\u264a\ufe0f',
-  	  'ghost':'\ud83d\udc7b',
-  	  'gift':'\ud83c\udf81',
-  	  'gift_heart':'\ud83d\udc9d',
-  	  'girl':'\ud83d\udc67',
-  	  'globe_with_meridians':'\ud83c\udf10',
-  	  'goal_net':'\ud83e\udd45',
-  	  'goat':'\ud83d\udc10',
-  	  'golf':'\u26f3\ufe0f',
-  	  'golfing_man':'\ud83c\udfcc\ufe0f',
-  	  'golfing_woman':'\ud83c\udfcc\ufe0f&zwj;\u2640\ufe0f',
-  	  'gorilla':'\ud83e\udd8d',
-  	  'grapes':'\ud83c\udf47',
-  	  'green_apple':'\ud83c\udf4f',
-  	  'green_book':'\ud83d\udcd7',
-  	  'green_heart':'\ud83d\udc9a',
-  	  'green_salad':'\ud83e\udd57',
-  	  'grey_exclamation':'\u2755',
-  	  'grey_question':'\u2754',
-  	  'grimacing':'\ud83d\ude2c',
-  	  'grin':'\ud83d\ude01',
-  	  'grinning':'\ud83d\ude00',
-  	  'guardsman':'\ud83d\udc82',
-  	  'guardswoman':'\ud83d\udc82&zwj;\u2640\ufe0f',
-  	  'guitar':'\ud83c\udfb8',
-  	  'gun':'\ud83d\udd2b',
-  	  'haircut_woman':'\ud83d\udc87',
-  	  'haircut_man':'\ud83d\udc87&zwj;\u2642\ufe0f',
-  	  'hamburger':'\ud83c\udf54',
-  	  'hammer':'\ud83d\udd28',
-  	  'hammer_and_pick':'\u2692',
-  	  'hammer_and_wrench':'\ud83d\udee0',
-  	  'hamster':'\ud83d\udc39',
-  	  'hand':'\u270b',
-  	  'handbag':'\ud83d\udc5c',
-  	  'handshake':'\ud83e\udd1d',
-  	  'hankey':'\ud83d\udca9',
-  	  'hatched_chick':'\ud83d\udc25',
-  	  'hatching_chick':'\ud83d\udc23',
-  	  'headphones':'\ud83c\udfa7',
-  	  'hear_no_evil':'\ud83d\ude49',
-  	  'heart':'\u2764\ufe0f',
-  	  'heart_decoration':'\ud83d\udc9f',
-  	  'heart_eyes':'\ud83d\ude0d',
-  	  'heart_eyes_cat':'\ud83d\ude3b',
-  	  'heartbeat':'\ud83d\udc93',
-  	  'heartpulse':'\ud83d\udc97',
-  	  'hearts':'\u2665\ufe0f',
-  	  'heavy_check_mark':'\u2714\ufe0f',
-  	  'heavy_division_sign':'\u2797',
-  	  'heavy_dollar_sign':'\ud83d\udcb2',
-  	  'heavy_heart_exclamation':'\u2763\ufe0f',
-  	  'heavy_minus_sign':'\u2796',
-  	  'heavy_multiplication_x':'\u2716\ufe0f',
-  	  'heavy_plus_sign':'\u2795',
-  	  'helicopter':'\ud83d\ude81',
-  	  'herb':'\ud83c\udf3f',
-  	  'hibiscus':'\ud83c\udf3a',
-  	  'high_brightness':'\ud83d\udd06',
-  	  'high_heel':'\ud83d\udc60',
-  	  'hocho':'\ud83d\udd2a',
-  	  'hole':'\ud83d\udd73',
-  	  'honey_pot':'\ud83c\udf6f',
-  	  'horse':'\ud83d\udc34',
-  	  'horse_racing':'\ud83c\udfc7',
-  	  'hospital':'\ud83c\udfe5',
-  	  'hot_pepper':'\ud83c\udf36',
-  	  'hotdog':'\ud83c\udf2d',
-  	  'hotel':'\ud83c\udfe8',
-  	  'hotsprings':'\u2668\ufe0f',
-  	  'hourglass':'\u231b\ufe0f',
-  	  'hourglass_flowing_sand':'\u23f3',
-  	  'house':'\ud83c\udfe0',
-  	  'house_with_garden':'\ud83c\udfe1',
-  	  'houses':'\ud83c\udfd8',
-  	  'hugs':'\ud83e\udd17',
-  	  'hushed':'\ud83d\ude2f',
-  	  'ice_cream':'\ud83c\udf68',
-  	  'ice_hockey':'\ud83c\udfd2',
-  	  'ice_skate':'\u26f8',
-  	  'icecream':'\ud83c\udf66',
-  	  'id':'\ud83c\udd94',
-  	  'ideograph_advantage':'\ud83c\ude50',
-  	  'imp':'\ud83d\udc7f',
-  	  'inbox_tray':'\ud83d\udce5',
-  	  'incoming_envelope':'\ud83d\udce8',
-  	  'tipping_hand_woman':'\ud83d\udc81',
-  	  'information_source':'\u2139\ufe0f',
-  	  'innocent':'\ud83d\ude07',
-  	  'interrobang':'\u2049\ufe0f',
-  	  'iphone':'\ud83d\udcf1',
-  	  'izakaya_lantern':'\ud83c\udfee',
-  	  'jack_o_lantern':'\ud83c\udf83',
-  	  'japan':'\ud83d\uddfe',
-  	  'japanese_castle':'\ud83c\udfef',
-  	  'japanese_goblin':'\ud83d\udc7a',
-  	  'japanese_ogre':'\ud83d\udc79',
-  	  'jeans':'\ud83d\udc56',
-  	  'joy':'\ud83d\ude02',
-  	  'joy_cat':'\ud83d\ude39',
-  	  'joystick':'\ud83d\udd79',
-  	  'kaaba':'\ud83d\udd4b',
-  	  'key':'\ud83d\udd11',
-  	  'keyboard':'\u2328\ufe0f',
-  	  'keycap_ten':'\ud83d\udd1f',
-  	  'kick_scooter':'\ud83d\udef4',
-  	  'kimono':'\ud83d\udc58',
-  	  'kiss':'\ud83d\udc8b',
-  	  'kissing':'\ud83d\ude17',
-  	  'kissing_cat':'\ud83d\ude3d',
-  	  'kissing_closed_eyes':'\ud83d\ude1a',
-  	  'kissing_heart':'\ud83d\ude18',
-  	  'kissing_smiling_eyes':'\ud83d\ude19',
-  	  'kiwi_fruit':'\ud83e\udd5d',
-  	  'koala':'\ud83d\udc28',
-  	  'koko':'\ud83c\ude01',
-  	  'label':'\ud83c\udff7',
-  	  'large_blue_circle':'\ud83d\udd35',
-  	  'large_blue_diamond':'\ud83d\udd37',
-  	  'large_orange_diamond':'\ud83d\udd36',
-  	  'last_quarter_moon':'\ud83c\udf17',
-  	  'last_quarter_moon_with_face':'\ud83c\udf1c',
-  	  'latin_cross':'\u271d\ufe0f',
-  	  'laughing':'\ud83d\ude06',
-  	  'leaves':'\ud83c\udf43',
-  	  'ledger':'\ud83d\udcd2',
-  	  'left_luggage':'\ud83d\udec5',
-  	  'left_right_arrow':'\u2194\ufe0f',
-  	  'leftwards_arrow_with_hook':'\u21a9\ufe0f',
-  	  'lemon':'\ud83c\udf4b',
-  	  'leo':'\u264c\ufe0f',
-  	  'leopard':'\ud83d\udc06',
-  	  'level_slider':'\ud83c\udf9a',
-  	  'libra':'\u264e\ufe0f',
-  	  'light_rail':'\ud83d\ude88',
-  	  'link':'\ud83d\udd17',
-  	  'lion':'\ud83e\udd81',
-  	  'lips':'\ud83d\udc44',
-  	  'lipstick':'\ud83d\udc84',
-  	  'lizard':'\ud83e\udd8e',
-  	  'lock':'\ud83d\udd12',
-  	  'lock_with_ink_pen':'\ud83d\udd0f',
-  	  'lollipop':'\ud83c\udf6d',
-  	  'loop':'\u27bf',
-  	  'loud_sound':'\ud83d\udd0a',
-  	  'loudspeaker':'\ud83d\udce2',
-  	  'love_hotel':'\ud83c\udfe9',
-  	  'love_letter':'\ud83d\udc8c',
-  	  'low_brightness':'\ud83d\udd05',
-  	  'lying_face':'\ud83e\udd25',
-  	  'm':'\u24c2\ufe0f',
-  	  'mag':'\ud83d\udd0d',
-  	  'mag_right':'\ud83d\udd0e',
-  	  'mahjong':'\ud83c\udc04\ufe0f',
-  	  'mailbox':'\ud83d\udceb',
-  	  'mailbox_closed':'\ud83d\udcea',
-  	  'mailbox_with_mail':'\ud83d\udcec',
-  	  'mailbox_with_no_mail':'\ud83d\udced',
-  	  'man':'\ud83d\udc68',
-  	  'man_artist':'\ud83d\udc68&zwj;\ud83c\udfa8',
-  	  'man_astronaut':'\ud83d\udc68&zwj;\ud83d\ude80',
-  	  'man_cartwheeling':'\ud83e\udd38&zwj;\u2642\ufe0f',
-  	  'man_cook':'\ud83d\udc68&zwj;\ud83c\udf73',
-  	  'man_dancing':'\ud83d\udd7a',
-  	  'man_facepalming':'\ud83e\udd26&zwj;\u2642\ufe0f',
-  	  'man_factory_worker':'\ud83d\udc68&zwj;\ud83c\udfed',
-  	  'man_farmer':'\ud83d\udc68&zwj;\ud83c\udf3e',
-  	  'man_firefighter':'\ud83d\udc68&zwj;\ud83d\ude92',
-  	  'man_health_worker':'\ud83d\udc68&zwj;\u2695\ufe0f',
-  	  'man_in_tuxedo':'\ud83e\udd35',
-  	  'man_judge':'\ud83d\udc68&zwj;\u2696\ufe0f',
-  	  'man_juggling':'\ud83e\udd39&zwj;\u2642\ufe0f',
-  	  'man_mechanic':'\ud83d\udc68&zwj;\ud83d\udd27',
-  	  'man_office_worker':'\ud83d\udc68&zwj;\ud83d\udcbc',
-  	  'man_pilot':'\ud83d\udc68&zwj;\u2708\ufe0f',
-  	  'man_playing_handball':'\ud83e\udd3e&zwj;\u2642\ufe0f',
-  	  'man_playing_water_polo':'\ud83e\udd3d&zwj;\u2642\ufe0f',
-  	  'man_scientist':'\ud83d\udc68&zwj;\ud83d\udd2c',
-  	  'man_shrugging':'\ud83e\udd37&zwj;\u2642\ufe0f',
-  	  'man_singer':'\ud83d\udc68&zwj;\ud83c\udfa4',
-  	  'man_student':'\ud83d\udc68&zwj;\ud83c\udf93',
-  	  'man_teacher':'\ud83d\udc68&zwj;\ud83c\udfeb',
-  	  'man_technologist':'\ud83d\udc68&zwj;\ud83d\udcbb',
-  	  'man_with_gua_pi_mao':'\ud83d\udc72',
-  	  'man_with_turban':'\ud83d\udc73',
-  	  'tangerine':'\ud83c\udf4a',
-  	  'mans_shoe':'\ud83d\udc5e',
-  	  'mantelpiece_clock':'\ud83d\udd70',
-  	  'maple_leaf':'\ud83c\udf41',
-  	  'martial_arts_uniform':'\ud83e\udd4b',
-  	  'mask':'\ud83d\ude37',
-  	  'massage_woman':'\ud83d\udc86',
-  	  'massage_man':'\ud83d\udc86&zwj;\u2642\ufe0f',
-  	  'meat_on_bone':'\ud83c\udf56',
-  	  'medal_military':'\ud83c\udf96',
-  	  'medal_sports':'\ud83c\udfc5',
-  	  'mega':'\ud83d\udce3',
-  	  'melon':'\ud83c\udf48',
-  	  'memo':'\ud83d\udcdd',
-  	  'men_wrestling':'\ud83e\udd3c&zwj;\u2642\ufe0f',
-  	  'menorah':'\ud83d\udd4e',
-  	  'mens':'\ud83d\udeb9',
-  	  'metal':'\ud83e\udd18',
-  	  'metro':'\ud83d\ude87',
-  	  'microphone':'\ud83c\udfa4',
-  	  'microscope':'\ud83d\udd2c',
-  	  'milk_glass':'\ud83e\udd5b',
-  	  'milky_way':'\ud83c\udf0c',
-  	  'minibus':'\ud83d\ude90',
-  	  'minidisc':'\ud83d\udcbd',
-  	  'mobile_phone_off':'\ud83d\udcf4',
-  	  'money_mouth_face':'\ud83e\udd11',
-  	  'money_with_wings':'\ud83d\udcb8',
-  	  'moneybag':'\ud83d\udcb0',
-  	  'monkey':'\ud83d\udc12',
-  	  'monkey_face':'\ud83d\udc35',
-  	  'monorail':'\ud83d\ude9d',
-  	  'moon':'\ud83c\udf14',
-  	  'mortar_board':'\ud83c\udf93',
-  	  'mosque':'\ud83d\udd4c',
-  	  'motor_boat':'\ud83d\udee5',
-  	  'motor_scooter':'\ud83d\udef5',
-  	  'motorcycle':'\ud83c\udfcd',
-  	  'motorway':'\ud83d\udee3',
-  	  'mount_fuji':'\ud83d\uddfb',
-  	  'mountain':'\u26f0',
-  	  'mountain_biking_man':'\ud83d\udeb5',
-  	  'mountain_biking_woman':'\ud83d\udeb5&zwj;\u2640\ufe0f',
-  	  'mountain_cableway':'\ud83d\udea0',
-  	  'mountain_railway':'\ud83d\ude9e',
-  	  'mountain_snow':'\ud83c\udfd4',
-  	  'mouse':'\ud83d\udc2d',
-  	  'mouse2':'\ud83d\udc01',
-  	  'movie_camera':'\ud83c\udfa5',
-  	  'moyai':'\ud83d\uddff',
-  	  'mrs_claus':'\ud83e\udd36',
-  	  'muscle':'\ud83d\udcaa',
-  	  'mushroom':'\ud83c\udf44',
-  	  'musical_keyboard':'\ud83c\udfb9',
-  	  'musical_note':'\ud83c\udfb5',
-  	  'musical_score':'\ud83c\udfbc',
-  	  'mute':'\ud83d\udd07',
-  	  'nail_care':'\ud83d\udc85',
-  	  'name_badge':'\ud83d\udcdb',
-  	  'national_park':'\ud83c\udfde',
-  	  'nauseated_face':'\ud83e\udd22',
-  	  'necktie':'\ud83d\udc54',
-  	  'negative_squared_cross_mark':'\u274e',
-  	  'nerd_face':'\ud83e\udd13',
-  	  'neutral_face':'\ud83d\ude10',
-  	  'new':'\ud83c\udd95',
-  	  'new_moon':'\ud83c\udf11',
-  	  'new_moon_with_face':'\ud83c\udf1a',
-  	  'newspaper':'\ud83d\udcf0',
-  	  'newspaper_roll':'\ud83d\uddde',
-  	  'next_track_button':'\u23ed',
-  	  'ng':'\ud83c\udd96',
-  	  'no_good_man':'\ud83d\ude45&zwj;\u2642\ufe0f',
-  	  'no_good_woman':'\ud83d\ude45',
-  	  'night_with_stars':'\ud83c\udf03',
-  	  'no_bell':'\ud83d\udd15',
-  	  'no_bicycles':'\ud83d\udeb3',
-  	  'no_entry':'\u26d4\ufe0f',
-  	  'no_entry_sign':'\ud83d\udeab',
-  	  'no_mobile_phones':'\ud83d\udcf5',
-  	  'no_mouth':'\ud83d\ude36',
-  	  'no_pedestrians':'\ud83d\udeb7',
-  	  'no_smoking':'\ud83d\udead',
-  	  'non-potable_water':'\ud83d\udeb1',
-  	  'nose':'\ud83d\udc43',
-  	  'notebook':'\ud83d\udcd3',
-  	  'notebook_with_decorative_cover':'\ud83d\udcd4',
-  	  'notes':'\ud83c\udfb6',
-  	  'nut_and_bolt':'\ud83d\udd29',
-  	  'o':'\u2b55\ufe0f',
-  	  'o2':'\ud83c\udd7e\ufe0f',
-  	  'ocean':'\ud83c\udf0a',
-  	  'octopus':'\ud83d\udc19',
-  	  'oden':'\ud83c\udf62',
-  	  'office':'\ud83c\udfe2',
-  	  'oil_drum':'\ud83d\udee2',
-  	  'ok':'\ud83c\udd97',
-  	  'ok_hand':'\ud83d\udc4c',
-  	  'ok_man':'\ud83d\ude46&zwj;\u2642\ufe0f',
-  	  'ok_woman':'\ud83d\ude46',
-  	  'old_key':'\ud83d\udddd',
-  	  'older_man':'\ud83d\udc74',
-  	  'older_woman':'\ud83d\udc75',
-  	  'om':'\ud83d\udd49',
-  	  'on':'\ud83d\udd1b',
-  	  'oncoming_automobile':'\ud83d\ude98',
-  	  'oncoming_bus':'\ud83d\ude8d',
-  	  'oncoming_police_car':'\ud83d\ude94',
-  	  'oncoming_taxi':'\ud83d\ude96',
-  	  'open_file_folder':'\ud83d\udcc2',
-  	  'open_hands':'\ud83d\udc50',
-  	  'open_mouth':'\ud83d\ude2e',
-  	  'open_umbrella':'\u2602\ufe0f',
-  	  'ophiuchus':'\u26ce',
-  	  'orange_book':'\ud83d\udcd9',
-  	  'orthodox_cross':'\u2626\ufe0f',
-  	  'outbox_tray':'\ud83d\udce4',
-  	  'owl':'\ud83e\udd89',
-  	  'ox':'\ud83d\udc02',
-  	  'package':'\ud83d\udce6',
-  	  'page_facing_up':'\ud83d\udcc4',
-  	  'page_with_curl':'\ud83d\udcc3',
-  	  'pager':'\ud83d\udcdf',
-  	  'paintbrush':'\ud83d\udd8c',
-  	  'palm_tree':'\ud83c\udf34',
-  	  'pancakes':'\ud83e\udd5e',
-  	  'panda_face':'\ud83d\udc3c',
-  	  'paperclip':'\ud83d\udcce',
-  	  'paperclips':'\ud83d\udd87',
-  	  'parasol_on_ground':'\u26f1',
-  	  'parking':'\ud83c\udd7f\ufe0f',
-  	  'part_alternation_mark':'\u303d\ufe0f',
-  	  'partly_sunny':'\u26c5\ufe0f',
-  	  'passenger_ship':'\ud83d\udef3',
-  	  'passport_control':'\ud83d\udec2',
-  	  'pause_button':'\u23f8',
-  	  'peace_symbol':'\u262e\ufe0f',
-  	  'peach':'\ud83c\udf51',
-  	  'peanuts':'\ud83e\udd5c',
-  	  'pear':'\ud83c\udf50',
-  	  'pen':'\ud83d\udd8a',
-  	  'pencil2':'\u270f\ufe0f',
-  	  'penguin':'\ud83d\udc27',
-  	  'pensive':'\ud83d\ude14',
-  	  'performing_arts':'\ud83c\udfad',
-  	  'persevere':'\ud83d\ude23',
-  	  'person_fencing':'\ud83e\udd3a',
-  	  'pouting_woman':'\ud83d\ude4e',
-  	  'phone':'\u260e\ufe0f',
-  	  'pick':'\u26cf',
-  	  'pig':'\ud83d\udc37',
-  	  'pig2':'\ud83d\udc16',
-  	  'pig_nose':'\ud83d\udc3d',
-  	  'pill':'\ud83d\udc8a',
-  	  'pineapple':'\ud83c\udf4d',
-  	  'ping_pong':'\ud83c\udfd3',
-  	  'pisces':'\u2653\ufe0f',
-  	  'pizza':'\ud83c\udf55',
-  	  'place_of_worship':'\ud83d\uded0',
-  	  'plate_with_cutlery':'\ud83c\udf7d',
-  	  'play_or_pause_button':'\u23ef',
-  	  'point_down':'\ud83d\udc47',
-  	  'point_left':'\ud83d\udc48',
-  	  'point_right':'\ud83d\udc49',
-  	  'point_up':'\u261d\ufe0f',
-  	  'point_up_2':'\ud83d\udc46',
-  	  'police_car':'\ud83d\ude93',
-  	  'policewoman':'\ud83d\udc6e&zwj;\u2640\ufe0f',
-  	  'poodle':'\ud83d\udc29',
-  	  'popcorn':'\ud83c\udf7f',
-  	  'post_office':'\ud83c\udfe3',
-  	  'postal_horn':'\ud83d\udcef',
-  	  'postbox':'\ud83d\udcee',
-  	  'potable_water':'\ud83d\udeb0',
-  	  'potato':'\ud83e\udd54',
-  	  'pouch':'\ud83d\udc5d',
-  	  'poultry_leg':'\ud83c\udf57',
-  	  'pound':'\ud83d\udcb7',
-  	  'rage':'\ud83d\ude21',
-  	  'pouting_cat':'\ud83d\ude3e',
-  	  'pouting_man':'\ud83d\ude4e&zwj;\u2642\ufe0f',
-  	  'pray':'\ud83d\ude4f',
-  	  'prayer_beads':'\ud83d\udcff',
-  	  'pregnant_woman':'\ud83e\udd30',
-  	  'previous_track_button':'\u23ee',
-  	  'prince':'\ud83e\udd34',
-  	  'princess':'\ud83d\udc78',
-  	  'printer':'\ud83d\udda8',
-  	  'purple_heart':'\ud83d\udc9c',
-  	  'purse':'\ud83d\udc5b',
-  	  'pushpin':'\ud83d\udccc',
-  	  'put_litter_in_its_place':'\ud83d\udeae',
-  	  'question':'\u2753',
-  	  'rabbit':'\ud83d\udc30',
-  	  'rabbit2':'\ud83d\udc07',
-  	  'racehorse':'\ud83d\udc0e',
-  	  'racing_car':'\ud83c\udfce',
-  	  'radio':'\ud83d\udcfb',
-  	  'radio_button':'\ud83d\udd18',
-  	  'radioactive':'\u2622\ufe0f',
-  	  'railway_car':'\ud83d\ude83',
-  	  'railway_track':'\ud83d\udee4',
-  	  'rainbow':'\ud83c\udf08',
-  	  'rainbow_flag':'\ud83c\udff3\ufe0f&zwj;\ud83c\udf08',
-  	  'raised_back_of_hand':'\ud83e\udd1a',
-  	  'raised_hand_with_fingers_splayed':'\ud83d\udd90',
-  	  'raised_hands':'\ud83d\ude4c',
-  	  'raising_hand_woman':'\ud83d\ude4b',
-  	  'raising_hand_man':'\ud83d\ude4b&zwj;\u2642\ufe0f',
-  	  'ram':'\ud83d\udc0f',
-  	  'ramen':'\ud83c\udf5c',
-  	  'rat':'\ud83d\udc00',
-  	  'record_button':'\u23fa',
-  	  'recycle':'\u267b\ufe0f',
-  	  'red_circle':'\ud83d\udd34',
-  	  'registered':'\u00ae\ufe0f',
-  	  'relaxed':'\u263a\ufe0f',
-  	  'relieved':'\ud83d\ude0c',
-  	  'reminder_ribbon':'\ud83c\udf97',
-  	  'repeat':'\ud83d\udd01',
-  	  'repeat_one':'\ud83d\udd02',
-  	  'rescue_worker_helmet':'\u26d1',
-  	  'restroom':'\ud83d\udebb',
-  	  'revolving_hearts':'\ud83d\udc9e',
-  	  'rewind':'\u23ea',
-  	  'rhinoceros':'\ud83e\udd8f',
-  	  'ribbon':'\ud83c\udf80',
-  	  'rice':'\ud83c\udf5a',
-  	  'rice_ball':'\ud83c\udf59',
-  	  'rice_cracker':'\ud83c\udf58',
-  	  'rice_scene':'\ud83c\udf91',
-  	  'right_anger_bubble':'\ud83d\uddef',
-  	  'ring':'\ud83d\udc8d',
-  	  'robot':'\ud83e\udd16',
-  	  'rocket':'\ud83d\ude80',
-  	  'rofl':'\ud83e\udd23',
-  	  'roll_eyes':'\ud83d\ude44',
-  	  'roller_coaster':'\ud83c\udfa2',
-  	  'rooster':'\ud83d\udc13',
-  	  'rose':'\ud83c\udf39',
-  	  'rosette':'\ud83c\udff5',
-  	  'rotating_light':'\ud83d\udea8',
-  	  'round_pushpin':'\ud83d\udccd',
-  	  'rowing_man':'\ud83d\udea3',
-  	  'rowing_woman':'\ud83d\udea3&zwj;\u2640\ufe0f',
-  	  'rugby_football':'\ud83c\udfc9',
-  	  'running_man':'\ud83c\udfc3',
-  	  'running_shirt_with_sash':'\ud83c\udfbd',
-  	  'running_woman':'\ud83c\udfc3&zwj;\u2640\ufe0f',
-  	  'sa':'\ud83c\ude02\ufe0f',
-  	  'sagittarius':'\u2650\ufe0f',
-  	  'sake':'\ud83c\udf76',
-  	  'sandal':'\ud83d\udc61',
-  	  'santa':'\ud83c\udf85',
-  	  'satellite':'\ud83d\udce1',
-  	  'saxophone':'\ud83c\udfb7',
-  	  'school':'\ud83c\udfeb',
-  	  'school_satchel':'\ud83c\udf92',
-  	  'scissors':'\u2702\ufe0f',
-  	  'scorpion':'\ud83e\udd82',
-  	  'scorpius':'\u264f\ufe0f',
-  	  'scream':'\ud83d\ude31',
-  	  'scream_cat':'\ud83d\ude40',
-  	  'scroll':'\ud83d\udcdc',
-  	  'seat':'\ud83d\udcba',
-  	  'secret':'\u3299\ufe0f',
-  	  'see_no_evil':'\ud83d\ude48',
-  	  'seedling':'\ud83c\udf31',
-  	  'selfie':'\ud83e\udd33',
-  	  'shallow_pan_of_food':'\ud83e\udd58',
-  	  'shamrock':'\u2618\ufe0f',
-  	  'shark':'\ud83e\udd88',
-  	  'shaved_ice':'\ud83c\udf67',
-  	  'sheep':'\ud83d\udc11',
-  	  'shell':'\ud83d\udc1a',
-  	  'shield':'\ud83d\udee1',
-  	  'shinto_shrine':'\u26e9',
-  	  'ship':'\ud83d\udea2',
-  	  'shirt':'\ud83d\udc55',
-  	  'shopping':'\ud83d\udecd',
-  	  'shopping_cart':'\ud83d\uded2',
-  	  'shower':'\ud83d\udebf',
-  	  'shrimp':'\ud83e\udd90',
-  	  'signal_strength':'\ud83d\udcf6',
-  	  'six_pointed_star':'\ud83d\udd2f',
-  	  'ski':'\ud83c\udfbf',
-  	  'skier':'\u26f7',
-  	  'skull':'\ud83d\udc80',
-  	  'skull_and_crossbones':'\u2620\ufe0f',
-  	  'sleeping':'\ud83d\ude34',
-  	  'sleeping_bed':'\ud83d\udecc',
-  	  'sleepy':'\ud83d\ude2a',
-  	  'slightly_frowning_face':'\ud83d\ude41',
-  	  'slightly_smiling_face':'\ud83d\ude42',
-  	  'slot_machine':'\ud83c\udfb0',
-  	  'small_airplane':'\ud83d\udee9',
-  	  'small_blue_diamond':'\ud83d\udd39',
-  	  'small_orange_diamond':'\ud83d\udd38',
-  	  'small_red_triangle':'\ud83d\udd3a',
-  	  'small_red_triangle_down':'\ud83d\udd3b',
-  	  'smile':'\ud83d\ude04',
-  	  'smile_cat':'\ud83d\ude38',
-  	  'smiley':'\ud83d\ude03',
-  	  'smiley_cat':'\ud83d\ude3a',
-  	  'smiling_imp':'\ud83d\ude08',
-  	  'smirk':'\ud83d\ude0f',
-  	  'smirk_cat':'\ud83d\ude3c',
-  	  'smoking':'\ud83d\udeac',
-  	  'snail':'\ud83d\udc0c',
-  	  'snake':'\ud83d\udc0d',
-  	  'sneezing_face':'\ud83e\udd27',
-  	  'snowboarder':'\ud83c\udfc2',
-  	  'snowflake':'\u2744\ufe0f',
-  	  'snowman':'\u26c4\ufe0f',
-  	  'snowman_with_snow':'\u2603\ufe0f',
-  	  'sob':'\ud83d\ude2d',
-  	  'soccer':'\u26bd\ufe0f',
-  	  'soon':'\ud83d\udd1c',
-  	  'sos':'\ud83c\udd98',
-  	  'sound':'\ud83d\udd09',
-  	  'space_invader':'\ud83d\udc7e',
-  	  'spades':'\u2660\ufe0f',
-  	  'spaghetti':'\ud83c\udf5d',
-  	  'sparkle':'\u2747\ufe0f',
-  	  'sparkler':'\ud83c\udf87',
-  	  'sparkles':'\u2728',
-  	  'sparkling_heart':'\ud83d\udc96',
-  	  'speak_no_evil':'\ud83d\ude4a',
-  	  'speaker':'\ud83d\udd08',
-  	  'speaking_head':'\ud83d\udde3',
-  	  'speech_balloon':'\ud83d\udcac',
-  	  'speedboat':'\ud83d\udea4',
-  	  'spider':'\ud83d\udd77',
-  	  'spider_web':'\ud83d\udd78',
-  	  'spiral_calendar':'\ud83d\uddd3',
-  	  'spiral_notepad':'\ud83d\uddd2',
-  	  'spoon':'\ud83e\udd44',
-  	  'squid':'\ud83e\udd91',
-  	  'stadium':'\ud83c\udfdf',
-  	  'star':'\u2b50\ufe0f',
-  	  'star2':'\ud83c\udf1f',
-  	  'star_and_crescent':'\u262a\ufe0f',
-  	  'star_of_david':'\u2721\ufe0f',
-  	  'stars':'\ud83c\udf20',
-  	  'station':'\ud83d\ude89',
-  	  'statue_of_liberty':'\ud83d\uddfd',
-  	  'steam_locomotive':'\ud83d\ude82',
-  	  'stew':'\ud83c\udf72',
-  	  'stop_button':'\u23f9',
-  	  'stop_sign':'\ud83d\uded1',
-  	  'stopwatch':'\u23f1',
-  	  'straight_ruler':'\ud83d\udccf',
-  	  'strawberry':'\ud83c\udf53',
-  	  'stuck_out_tongue':'\ud83d\ude1b',
-  	  'stuck_out_tongue_closed_eyes':'\ud83d\ude1d',
-  	  'stuck_out_tongue_winking_eye':'\ud83d\ude1c',
-  	  'studio_microphone':'\ud83c\udf99',
-  	  'stuffed_flatbread':'\ud83e\udd59',
-  	  'sun_behind_large_cloud':'\ud83c\udf25',
-  	  'sun_behind_rain_cloud':'\ud83c\udf26',
-  	  'sun_behind_small_cloud':'\ud83c\udf24',
-  	  'sun_with_face':'\ud83c\udf1e',
-  	  'sunflower':'\ud83c\udf3b',
-  	  'sunglasses':'\ud83d\ude0e',
-  	  'sunny':'\u2600\ufe0f',
-  	  'sunrise':'\ud83c\udf05',
-  	  'sunrise_over_mountains':'\ud83c\udf04',
-  	  'surfing_man':'\ud83c\udfc4',
-  	  'surfing_woman':'\ud83c\udfc4&zwj;\u2640\ufe0f',
-  	  'sushi':'\ud83c\udf63',
-  	  'suspension_railway':'\ud83d\ude9f',
-  	  'sweat':'\ud83d\ude13',
-  	  'sweat_drops':'\ud83d\udca6',
-  	  'sweat_smile':'\ud83d\ude05',
-  	  'sweet_potato':'\ud83c\udf60',
-  	  'swimming_man':'\ud83c\udfca',
-  	  'swimming_woman':'\ud83c\udfca&zwj;\u2640\ufe0f',
-  	  'symbols':'\ud83d\udd23',
-  	  'synagogue':'\ud83d\udd4d',
-  	  'syringe':'\ud83d\udc89',
-  	  'taco':'\ud83c\udf2e',
-  	  'tada':'\ud83c\udf89',
-  	  'tanabata_tree':'\ud83c\udf8b',
-  	  'taurus':'\u2649\ufe0f',
-  	  'taxi':'\ud83d\ude95',
-  	  'tea':'\ud83c\udf75',
-  	  'telephone_receiver':'\ud83d\udcde',
-  	  'telescope':'\ud83d\udd2d',
-  	  'tennis':'\ud83c\udfbe',
-  	  'tent':'\u26fa\ufe0f',
-  	  'thermometer':'\ud83c\udf21',
-  	  'thinking':'\ud83e\udd14',
-  	  'thought_balloon':'\ud83d\udcad',
-  	  'ticket':'\ud83c\udfab',
-  	  'tickets':'\ud83c\udf9f',
-  	  'tiger':'\ud83d\udc2f',
-  	  'tiger2':'\ud83d\udc05',
-  	  'timer_clock':'\u23f2',
-  	  'tipping_hand_man':'\ud83d\udc81&zwj;\u2642\ufe0f',
-  	  'tired_face':'\ud83d\ude2b',
-  	  'tm':'\u2122\ufe0f',
-  	  'toilet':'\ud83d\udebd',
-  	  'tokyo_tower':'\ud83d\uddfc',
-  	  'tomato':'\ud83c\udf45',
-  	  'tongue':'\ud83d\udc45',
-  	  'top':'\ud83d\udd1d',
-  	  'tophat':'\ud83c\udfa9',
-  	  'tornado':'\ud83c\udf2a',
-  	  'trackball':'\ud83d\uddb2',
-  	  'tractor':'\ud83d\ude9c',
-  	  'traffic_light':'\ud83d\udea5',
-  	  'train':'\ud83d\ude8b',
-  	  'train2':'\ud83d\ude86',
-  	  'tram':'\ud83d\ude8a',
-  	  'triangular_flag_on_post':'\ud83d\udea9',
-  	  'triangular_ruler':'\ud83d\udcd0',
-  	  'trident':'\ud83d\udd31',
-  	  'triumph':'\ud83d\ude24',
-  	  'trolleybus':'\ud83d\ude8e',
-  	  'trophy':'\ud83c\udfc6',
-  	  'tropical_drink':'\ud83c\udf79',
-  	  'tropical_fish':'\ud83d\udc20',
-  	  'truck':'\ud83d\ude9a',
-  	  'trumpet':'\ud83c\udfba',
-  	  'tulip':'\ud83c\udf37',
-  	  'tumbler_glass':'\ud83e\udd43',
-  	  'turkey':'\ud83e\udd83',
-  	  'turtle':'\ud83d\udc22',
-  	  'tv':'\ud83d\udcfa',
-  	  'twisted_rightwards_arrows':'\ud83d\udd00',
-  	  'two_hearts':'\ud83d\udc95',
-  	  'two_men_holding_hands':'\ud83d\udc6c',
-  	  'two_women_holding_hands':'\ud83d\udc6d',
-  	  'u5272':'\ud83c\ude39',
-  	  'u5408':'\ud83c\ude34',
-  	  'u55b6':'\ud83c\ude3a',
-  	  'u6307':'\ud83c\ude2f\ufe0f',
-  	  'u6708':'\ud83c\ude37\ufe0f',
-  	  'u6709':'\ud83c\ude36',
-  	  'u6e80':'\ud83c\ude35',
-  	  'u7121':'\ud83c\ude1a\ufe0f',
-  	  'u7533':'\ud83c\ude38',
-  	  'u7981':'\ud83c\ude32',
-  	  'u7a7a':'\ud83c\ude33',
-  	  'umbrella':'\u2614\ufe0f',
-  	  'unamused':'\ud83d\ude12',
-  	  'underage':'\ud83d\udd1e',
-  	  'unicorn':'\ud83e\udd84',
-  	  'unlock':'\ud83d\udd13',
-  	  'up':'\ud83c\udd99',
-  	  'upside_down_face':'\ud83d\ude43',
-  	  'v':'\u270c\ufe0f',
-  	  'vertical_traffic_light':'\ud83d\udea6',
-  	  'vhs':'\ud83d\udcfc',
-  	  'vibration_mode':'\ud83d\udcf3',
-  	  'video_camera':'\ud83d\udcf9',
-  	  'video_game':'\ud83c\udfae',
-  	  'violin':'\ud83c\udfbb',
-  	  'virgo':'\u264d\ufe0f',
-  	  'volcano':'\ud83c\udf0b',
-  	  'volleyball':'\ud83c\udfd0',
-  	  'vs':'\ud83c\udd9a',
-  	  'vulcan_salute':'\ud83d\udd96',
-  	  'walking_man':'\ud83d\udeb6',
-  	  'walking_woman':'\ud83d\udeb6&zwj;\u2640\ufe0f',
-  	  'waning_crescent_moon':'\ud83c\udf18',
-  	  'waning_gibbous_moon':'\ud83c\udf16',
-  	  'warning':'\u26a0\ufe0f',
-  	  'wastebasket':'\ud83d\uddd1',
-  	  'watch':'\u231a\ufe0f',
-  	  'water_buffalo':'\ud83d\udc03',
-  	  'watermelon':'\ud83c\udf49',
-  	  'wave':'\ud83d\udc4b',
-  	  'wavy_dash':'\u3030\ufe0f',
-  	  'waxing_crescent_moon':'\ud83c\udf12',
-  	  'wc':'\ud83d\udebe',
-  	  'weary':'\ud83d\ude29',
-  	  'wedding':'\ud83d\udc92',
-  	  'weight_lifting_man':'\ud83c\udfcb\ufe0f',
-  	  'weight_lifting_woman':'\ud83c\udfcb\ufe0f&zwj;\u2640\ufe0f',
-  	  'whale':'\ud83d\udc33',
-  	  'whale2':'\ud83d\udc0b',
-  	  'wheel_of_dharma':'\u2638\ufe0f',
-  	  'wheelchair':'\u267f\ufe0f',
-  	  'white_check_mark':'\u2705',
-  	  'white_circle':'\u26aa\ufe0f',
-  	  'white_flag':'\ud83c\udff3\ufe0f',
-  	  'white_flower':'\ud83d\udcae',
-  	  'white_large_square':'\u2b1c\ufe0f',
-  	  'white_medium_small_square':'\u25fd\ufe0f',
-  	  'white_medium_square':'\u25fb\ufe0f',
-  	  'white_small_square':'\u25ab\ufe0f',
-  	  'white_square_button':'\ud83d\udd33',
-  	  'wilted_flower':'\ud83e\udd40',
-  	  'wind_chime':'\ud83c\udf90',
-  	  'wind_face':'\ud83c\udf2c',
-  	  'wine_glass':'\ud83c\udf77',
-  	  'wink':'\ud83d\ude09',
-  	  'wolf':'\ud83d\udc3a',
-  	  'woman':'\ud83d\udc69',
-  	  'woman_artist':'\ud83d\udc69&zwj;\ud83c\udfa8',
-  	  'woman_astronaut':'\ud83d\udc69&zwj;\ud83d\ude80',
-  	  'woman_cartwheeling':'\ud83e\udd38&zwj;\u2640\ufe0f',
-  	  'woman_cook':'\ud83d\udc69&zwj;\ud83c\udf73',
-  	  'woman_facepalming':'\ud83e\udd26&zwj;\u2640\ufe0f',
-  	  'woman_factory_worker':'\ud83d\udc69&zwj;\ud83c\udfed',
-  	  'woman_farmer':'\ud83d\udc69&zwj;\ud83c\udf3e',
-  	  'woman_firefighter':'\ud83d\udc69&zwj;\ud83d\ude92',
-  	  'woman_health_worker':'\ud83d\udc69&zwj;\u2695\ufe0f',
-  	  'woman_judge':'\ud83d\udc69&zwj;\u2696\ufe0f',
-  	  'woman_juggling':'\ud83e\udd39&zwj;\u2640\ufe0f',
-  	  'woman_mechanic':'\ud83d\udc69&zwj;\ud83d\udd27',
-  	  'woman_office_worker':'\ud83d\udc69&zwj;\ud83d\udcbc',
-  	  'woman_pilot':'\ud83d\udc69&zwj;\u2708\ufe0f',
-  	  'woman_playing_handball':'\ud83e\udd3e&zwj;\u2640\ufe0f',
-  	  'woman_playing_water_polo':'\ud83e\udd3d&zwj;\u2640\ufe0f',
-  	  'woman_scientist':'\ud83d\udc69&zwj;\ud83d\udd2c',
-  	  'woman_shrugging':'\ud83e\udd37&zwj;\u2640\ufe0f',
-  	  'woman_singer':'\ud83d\udc69&zwj;\ud83c\udfa4',
-  	  'woman_student':'\ud83d\udc69&zwj;\ud83c\udf93',
-  	  'woman_teacher':'\ud83d\udc69&zwj;\ud83c\udfeb',
-  	  'woman_technologist':'\ud83d\udc69&zwj;\ud83d\udcbb',
-  	  'woman_with_turban':'\ud83d\udc73&zwj;\u2640\ufe0f',
-  	  'womans_clothes':'\ud83d\udc5a',
-  	  'womans_hat':'\ud83d\udc52',
-  	  'women_wrestling':'\ud83e\udd3c&zwj;\u2640\ufe0f',
-  	  'womens':'\ud83d\udeba',
-  	  'world_map':'\ud83d\uddfa',
-  	  'worried':'\ud83d\ude1f',
-  	  'wrench':'\ud83d\udd27',
-  	  'writing_hand':'\u270d\ufe0f',
-  	  'x':'\u274c',
-  	  'yellow_heart':'\ud83d\udc9b',
-  	  'yen':'\ud83d\udcb4',
-  	  'yin_yang':'\u262f\ufe0f',
-  	  'yum':'\ud83d\ude0b',
-  	  'zap':'\u26a1\ufe0f',
-  	  'zipper_mouth_face':'\ud83e\udd10',
-  	  'zzz':'\ud83d\udca4',
-
-  	  /* special emojis :P */
-  	  'octocat':  '<img alt=":octocat:" height="20" width="20" align="absmiddle" src="https://assets-cdn.github.com/images/icons/emoji/octocat.png">',
-  	  'showdown': '<span style="font-family: \'Anonymous Pro\', monospace; text-decoration: underline; text-decoration-style: dashed; text-decoration-color: #3e8b8a;text-underline-position: under;">S</span>'
-  	};
-
-  	/**
-  	 * Created by Estevao on 31-05-2015.
-  	 */
-
-  	/**
-  	 * Showdown Converter class
-  	 * @class
-  	 * @param {object} [converterOptions]
-  	 * @returns {Converter}
-  	 */
-  	showdown.Converter = function (converterOptions) {
-
-  	  var
-  	      /**
-  	       * Options used by this converter
-  	       * @private
-  	       * @type {{}}
-  	       */
-  	      options = {},
-
-  	      /**
-  	       * Language extensions used by this converter
-  	       * @private
-  	       * @type {Array}
-  	       */
-  	      langExtensions = [],
-
-  	      /**
-  	       * Output modifiers extensions used by this converter
-  	       * @private
-  	       * @type {Array}
-  	       */
-  	      outputModifiers = [],
-
-  	      /**
-  	       * Event listeners
-  	       * @private
-  	       * @type {{}}
-  	       */
-  	      listeners = {},
-
-  	      /**
-  	       * The flavor set in this converter
-  	       */
-  	      setConvFlavor = setFlavor,
-
-  	      /**
-  	       * Metadata of the document
-  	       * @type {{parsed: {}, raw: string, format: string}}
-  	       */
-  	      metadata = {
-  	        parsed: {},
-  	        raw: '',
-  	        format: ''
-  	      };
-
-  	  _constructor();
-
-  	  /**
-  	   * Converter constructor
-  	   * @private
-  	   */
-  	  function _constructor () {
-  	    converterOptions = converterOptions || {};
-
-  	    for (var gOpt in globalOptions) {
-  	      if (globalOptions.hasOwnProperty(gOpt)) {
-  	        options[gOpt] = globalOptions[gOpt];
-  	      }
-  	    }
-
-  	    // Merge options
-  	    if (typeof converterOptions === 'object') {
-  	      for (var opt in converterOptions) {
-  	        if (converterOptions.hasOwnProperty(opt)) {
-  	          options[opt] = converterOptions[opt];
-  	        }
-  	      }
-  	    } else {
-  	      throw Error('Converter expects the passed parameter to be an object, but ' + typeof converterOptions +
-  	      ' was passed instead.');
-  	    }
-
-  	    if (options.extensions) {
-  	      showdown.helper.forEach(options.extensions, _parseExtension);
-  	    }
-  	  }
-
-  	  /**
-  	   * Parse extension
-  	   * @param {*} ext
-  	   * @param {string} [name='']
-  	   * @private
-  	   */
-  	  function _parseExtension (ext, name) {
-
-  	    name = name || null;
-  	    // If it's a string, the extension was previously loaded
-  	    if (showdown.helper.isString(ext)) {
-  	      ext = showdown.helper.stdExtName(ext);
-  	      name = ext;
-
-  	      // LEGACY_SUPPORT CODE
-  	      if (showdown.extensions[ext]) {
-  	        console.warn('DEPRECATION WARNING: ' + ext + ' is an old extension that uses a deprecated loading method.' +
-  	          'Please inform the developer that the extension should be updated!');
-  	        legacyExtensionLoading(showdown.extensions[ext], ext);
-  	        return;
-  	        // END LEGACY SUPPORT CODE
-
-  	      } else if (!showdown.helper.isUndefined(extensions[ext])) {
-  	        ext = extensions[ext];
-
-  	      } else {
-  	        throw Error('Extension "' + ext + '" could not be loaded. It was either not found or is not a valid extension.');
-  	      }
-  	    }
-
-  	    if (typeof ext === 'function') {
-  	      ext = ext();
-  	    }
-
-  	    if (!showdown.helper.isArray(ext)) {
-  	      ext = [ext];
-  	    }
-
-  	    var validExt = validate(ext, name);
-  	    if (!validExt.valid) {
-  	      throw Error(validExt.error);
-  	    }
-
-  	    for (var i = 0; i < ext.length; ++i) {
-  	      switch (ext[i].type) {
-
-  	        case 'lang':
-  	          langExtensions.push(ext[i]);
-  	          break;
-
-  	        case 'output':
-  	          outputModifiers.push(ext[i]);
-  	          break;
-  	      }
-  	      if (ext[i].hasOwnProperty('listeners')) {
-  	        for (var ln in ext[i].listeners) {
-  	          if (ext[i].listeners.hasOwnProperty(ln)) {
-  	            listen(ln, ext[i].listeners[ln]);
-  	          }
-  	        }
-  	      }
-  	    }
-
-  	  }
-
-  	  /**
-  	   * LEGACY_SUPPORT
-  	   * @param {*} ext
-  	   * @param {string} name
-  	   */
-  	  function legacyExtensionLoading (ext, name) {
-  	    if (typeof ext === 'function') {
-  	      ext = ext(new showdown.Converter());
-  	    }
-  	    if (!showdown.helper.isArray(ext)) {
-  	      ext = [ext];
-  	    }
-  	    var valid = validate(ext, name);
-
-  	    if (!valid.valid) {
-  	      throw Error(valid.error);
-  	    }
-
-  	    for (var i = 0; i < ext.length; ++i) {
-  	      switch (ext[i].type) {
-  	        case 'lang':
-  	          langExtensions.push(ext[i]);
-  	          break;
-  	        case 'output':
-  	          outputModifiers.push(ext[i]);
-  	          break;
-  	        default:// should never reach here
-  	          throw Error('Extension loader error: Type unrecognized!!!');
-  	      }
-  	    }
-  	  }
-
-  	  /**
-  	   * Listen to an event
-  	   * @param {string} name
-  	   * @param {function} callback
-  	   */
-  	  function listen (name, callback) {
-  	    if (!showdown.helper.isString(name)) {
-  	      throw Error('Invalid argument in converter.listen() method: name must be a string, but ' + typeof name + ' given');
-  	    }
-
-  	    if (typeof callback !== 'function') {
-  	      throw Error('Invalid argument in converter.listen() method: callback must be a function, but ' + typeof callback + ' given');
-  	    }
-
-  	    if (!listeners.hasOwnProperty(name)) {
-  	      listeners[name] = [];
-  	    }
-  	    listeners[name].push(callback);
-  	  }
-
-  	  function rTrimInputText (text) {
-  	    var rsp = text.match(/^\s*/)[0].length,
-  	        rgx = new RegExp('^\\s{0,' + rsp + '}', 'gm');
-  	    return text.replace(rgx, '');
-  	  }
-
-  	  /**
-  	   * Dispatch an event
-  	   * @private
-  	   * @param {string} evtName Event name
-  	   * @param {string} text Text
-  	   * @param {{}} options Converter Options
-  	   * @param {{}} globals
-  	   * @returns {string}
-  	   */
-  	  this._dispatch = function dispatch (evtName, text, options, globals) {
-  	    if (listeners.hasOwnProperty(evtName)) {
-  	      for (var ei = 0; ei < listeners[evtName].length; ++ei) {
-  	        var nText = listeners[evtName][ei](evtName, text, this, options, globals);
-  	        if (nText && typeof nText !== 'undefined') {
-  	          text = nText;
-  	        }
-  	      }
-  	    }
-  	    return text;
-  	  };
-
-  	  /**
-  	   * Listen to an event
-  	   * @param {string} name
-  	   * @param {function} callback
-  	   * @returns {showdown.Converter}
-  	   */
-  	  this.listen = function (name, callback) {
-  	    listen(name, callback);
-  	    return this;
-  	  };
-
-  	  /**
-  	   * Converts a markdown string into HTML
-  	   * @param {string} text
-  	   * @returns {*}
-  	   */
-  	  this.makeHtml = function (text) {
-  	    //check if text is not falsy
-  	    if (!text) {
-  	      return text;
-  	    }
-
-  	    var globals = {
-  	      gHtmlBlocks:     [],
-  	      gHtmlMdBlocks:   [],
-  	      gHtmlSpans:      [],
-  	      gUrls:           {},
-  	      gTitles:         {},
-  	      gDimensions:     {},
-  	      gListLevel:      0,
-  	      hashLinkCounts:  {},
-  	      langExtensions:  langExtensions,
-  	      outputModifiers: outputModifiers,
-  	      converter:       this,
-  	      ghCodeBlocks:    [],
-  	      metadata: {
-  	        parsed: {},
-  	        raw: '',
-  	        format: ''
-  	      }
-  	    };
-
-  	    // This lets us use ¨ trema as an escape char to avoid md5 hashes
-  	    // The choice of character is arbitrary; anything that isn't
-  	    // magic in Markdown will work.
-  	    text = text.replace(/¨/g, '¨T');
-
-  	    // Replace $ with ¨D
-  	    // RegExp interprets $ as a special character
-  	    // when it's in a replacement string
-  	    text = text.replace(/\$/g, '¨D');
-
-  	    // Standardize line endings
-  	    text = text.replace(/\r\n/g, '\n'); // DOS to Unix
-  	    text = text.replace(/\r/g, '\n'); // Mac to Unix
-
-  	    // Stardardize line spaces
-  	    text = text.replace(/\u00A0/g, '&nbsp;');
-
-  	    if (options.smartIndentationFix) {
-  	      text = rTrimInputText(text);
-  	    }
-
-  	    // Make sure text begins and ends with a couple of newlines:
-  	    text = '\n\n' + text + '\n\n';
-
-  	    // detab
-  	    text = showdown.subParser('detab')(text, options, globals);
-
-  	    /**
-  	     * Strip any lines consisting only of spaces and tabs.
-  	     * This makes subsequent regexs easier to write, because we can
-  	     * match consecutive blank lines with /\n+/ instead of something
-  	     * contorted like /[ \t]*\n+/
-  	     */
-  	    text = text.replace(/^[ \t]+$/mg, '');
-
-  	    //run languageExtensions
-  	    showdown.helper.forEach(langExtensions, function (ext) {
-  	      text = showdown.subParser('runExtension')(ext, text, options, globals);
-  	    });
-
-  	    // run the sub parsers
-  	    text = showdown.subParser('metadata')(text, options, globals);
-  	    text = showdown.subParser('hashPreCodeTags')(text, options, globals);
-  	    text = showdown.subParser('githubCodeBlocks')(text, options, globals);
-  	    text = showdown.subParser('hashHTMLBlocks')(text, options, globals);
-  	    text = showdown.subParser('hashCodeTags')(text, options, globals);
-  	    text = showdown.subParser('stripLinkDefinitions')(text, options, globals);
-  	    text = showdown.subParser('blockGamut')(text, options, globals);
-  	    text = showdown.subParser('unhashHTMLSpans')(text, options, globals);
-  	    text = showdown.subParser('unescapeSpecialChars')(text, options, globals);
-
-  	    // attacklab: Restore dollar signs
-  	    text = text.replace(/¨D/g, '$$');
-
-  	    // attacklab: Restore tremas
-  	    text = text.replace(/¨T/g, '¨');
-
-  	    // render a complete html document instead of a partial if the option is enabled
-  	    text = showdown.subParser('completeHTMLDocument')(text, options, globals);
-
-  	    // Run output modifiers
-  	    showdown.helper.forEach(outputModifiers, function (ext) {
-  	      text = showdown.subParser('runExtension')(ext, text, options, globals);
-  	    });
-
-  	    // update metadata
-  	    metadata = globals.metadata;
-  	    return text;
-  	  };
-
-  	  /**
-  	   * Converts an HTML string into a markdown string
-  	   * @param src
-  	   * @param [HTMLParser] A WHATWG DOM and HTML parser, such as JSDOM. If none is supplied, window.document will be used.
-  	   * @returns {string}
-  	   */
-  	  this.makeMarkdown = this.makeMd = function (src, HTMLParser) {
-
-  	    // replace \r\n with \n
-  	    src = src.replace(/\r\n/g, '\n');
-  	    src = src.replace(/\r/g, '\n'); // old macs
-
-  	    // due to an edge case, we need to find this: > <
-  	    // to prevent removing of non silent white spaces
-  	    // ex: <em>this is</em> <strong>sparta</strong>
-  	    src = src.replace(/>[ \t]+</, '>¨NBSP;<');
-
-  	    if (!HTMLParser) {
-  	      if (window && window.document) {
-  	        HTMLParser = window.document;
-  	      } else {
-  	        throw new Error('HTMLParser is undefined. If in a webworker or nodejs environment, you need to provide a WHATWG DOM and HTML such as JSDOM');
-  	      }
-  	    }
-
-  	    var doc = HTMLParser.createElement('div');
-  	    doc.innerHTML = src;
-
-  	    var globals = {
-  	      preList: substitutePreCodeTags(doc)
-  	    };
-
-  	    // remove all newlines and collapse spaces
-  	    clean(doc);
-
-  	    // some stuff, like accidental reference links must now be escaped
-  	    // TODO
-  	    // doc.innerHTML = doc.innerHTML.replace(/\[[\S\t ]]/);
-
-  	    var nodes = doc.childNodes,
-  	        mdDoc = '';
-
-  	    for (var i = 0; i < nodes.length; i++) {
-  	      mdDoc += showdown.subParser('makeMarkdown.node')(nodes[i], globals);
-  	    }
-
-  	    function clean (node) {
-  	      for (var n = 0; n < node.childNodes.length; ++n) {
-  	        var child = node.childNodes[n];
-  	        if (child.nodeType === 3) {
-  	          if (!/\S/.test(child.nodeValue) && !/^[ ]+$/.test(child.nodeValue)) {
-  	            node.removeChild(child);
-  	            --n;
-  	          } else {
-  	            child.nodeValue = child.nodeValue.split('\n').join(' ');
-  	            child.nodeValue = child.nodeValue.replace(/(\s)+/g, '$1');
-  	          }
-  	        } else if (child.nodeType === 1) {
-  	          clean(child);
-  	        }
-  	      }
-  	    }
-
-  	    // find all pre tags and replace contents with placeholder
-  	    // we need this so that we can remove all indentation from html
-  	    // to ease up parsing
-  	    function substitutePreCodeTags (doc) {
-
-  	      var pres = doc.querySelectorAll('pre'),
-  	          presPH = [];
-
-  	      for (var i = 0; i < pres.length; ++i) {
-
-  	        if (pres[i].childElementCount === 1 && pres[i].firstChild.tagName.toLowerCase() === 'code') {
-  	          var content = pres[i].firstChild.innerHTML.trim(),
-  	              language = pres[i].firstChild.getAttribute('data-language') || '';
-
-  	          // if data-language attribute is not defined, then we look for class language-*
-  	          if (language === '') {
-  	            var classes = pres[i].firstChild.className.split(' ');
-  	            for (var c = 0; c < classes.length; ++c) {
-  	              var matches = classes[c].match(/^language-(.+)$/);
-  	              if (matches !== null) {
-  	                language = matches[1];
-  	                break;
-  	              }
-  	            }
-  	          }
-
-  	          // unescape html entities in content
-  	          content = showdown.helper.unescapeHTMLEntities(content);
-
-  	          presPH.push(content);
-  	          pres[i].outerHTML = '<precode language="' + language + '" precodenum="' + i.toString() + '"></precode>';
-  	        } else {
-  	          presPH.push(pres[i].innerHTML);
-  	          pres[i].innerHTML = '';
-  	          pres[i].setAttribute('prenum', i.toString());
-  	        }
-  	      }
-  	      return presPH;
-  	    }
-
-  	    return mdDoc;
-  	  };
-
-  	  /**
-  	   * Set an option of this Converter instance
-  	   * @param {string} key
-  	   * @param {*} value
-  	   */
-  	  this.setOption = function (key, value) {
-  	    options[key] = value;
-  	  };
-
-  	  /**
-  	   * Get the option of this Converter instance
-  	   * @param {string} key
-  	   * @returns {*}
-  	   */
-  	  this.getOption = function (key) {
-  	    return options[key];
-  	  };
-
-  	  /**
-  	   * Get the options of this Converter instance
-  	   * @returns {{}}
-  	   */
-  	  this.getOptions = function () {
-  	    return options;
-  	  };
-
-  	  /**
-  	   * Add extension to THIS converter
-  	   * @param {{}} extension
-  	   * @param {string} [name=null]
-  	   */
-  	  this.addExtension = function (extension, name) {
-  	    name = name || null;
-  	    _parseExtension(extension, name);
-  	  };
-
-  	  /**
-  	   * Use a global registered extension with THIS converter
-  	   * @param {string} extensionName Name of the previously registered extension
-  	   */
-  	  this.useExtension = function (extensionName) {
-  	    _parseExtension(extensionName);
-  	  };
-
-  	  /**
-  	   * Set the flavor THIS converter should use
-  	   * @param {string} name
-  	   */
-  	  this.setFlavor = function (name) {
-  	    if (!flavor.hasOwnProperty(name)) {
-  	      throw Error(name + ' flavor was not found');
-  	    }
-  	    var preset = flavor[name];
-  	    setConvFlavor = name;
-  	    for (var option in preset) {
-  	      if (preset.hasOwnProperty(option)) {
-  	        options[option] = preset[option];
-  	      }
-  	    }
-  	  };
-
-  	  /**
-  	   * Get the currently set flavor of this converter
-  	   * @returns {string}
-  	   */
-  	  this.getFlavor = function () {
-  	    return setConvFlavor;
-  	  };
-
-  	  /**
-  	   * Remove an extension from THIS converter.
-  	   * Note: This is a costly operation. It's better to initialize a new converter
-  	   * and specify the extensions you wish to use
-  	   * @param {Array} extension
-  	   */
-  	  this.removeExtension = function (extension) {
-  	    if (!showdown.helper.isArray(extension)) {
-  	      extension = [extension];
-  	    }
-  	    for (var a = 0; a < extension.length; ++a) {
-  	      var ext = extension[a];
-  	      for (var i = 0; i < langExtensions.length; ++i) {
-  	        if (langExtensions[i] === ext) {
-  	          langExtensions.splice(i, 1);
-  	        }
-  	      }
-  	      for (var ii = 0; ii < outputModifiers.length; ++ii) {
-  	        if (outputModifiers[ii] === ext) {
-  	          outputModifiers.splice(ii, 1);
-  	        }
-  	      }
-  	    }
-  	  };
-
-  	  /**
-  	   * Get all extension of THIS converter
-  	   * @returns {{language: Array, output: Array}}
-  	   */
-  	  this.getAllExtensions = function () {
-  	    return {
-  	      language: langExtensions,
-  	      output: outputModifiers
-  	    };
-  	  };
-
-  	  /**
-  	   * Get the metadata of the previously parsed document
-  	   * @param raw
-  	   * @returns {string|{}}
-  	   */
-  	  this.getMetadata = function (raw) {
-  	    if (raw) {
-  	      return metadata.raw;
-  	    } else {
-  	      return metadata.parsed;
-  	    }
-  	  };
-
-  	  /**
-  	   * Get the metadata format of the previously parsed document
-  	   * @returns {string}
-  	   */
-  	  this.getMetadataFormat = function () {
-  	    return metadata.format;
-  	  };
-
-  	  /**
-  	   * Private: set a single key, value metadata pair
-  	   * @param {string} key
-  	   * @param {string} value
-  	   */
-  	  this._setMetadataPair = function (key, value) {
-  	    metadata.parsed[key] = value;
-  	  };
-
-  	  /**
-  	   * Private: set metadata format
-  	   * @param {string} format
-  	   */
-  	  this._setMetadataFormat = function (format) {
-  	    metadata.format = format;
-  	  };
-
-  	  /**
-  	   * Private: set metadata raw text
-  	   * @param {string} raw
-  	   */
-  	  this._setMetadataRaw = function (raw) {
-  	    metadata.raw = raw;
-  	  };
-  	};
-
-  	/**
-  	 * Turn Markdown link shortcuts into XHTML <a> tags.
-  	 */
-  	showdown.subParser('anchors', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('anchors.before', text, options, globals);
-
-  	  var writeAnchorTag = function (wholeMatch, linkText, linkId, url, m5, m6, title) {
-  	    if (showdown.helper.isUndefined(title)) {
-  	      title = '';
-  	    }
-  	    linkId = linkId.toLowerCase();
-
-  	    // Special case for explicit empty url
-  	    if (wholeMatch.search(/\(<?\s*>? ?(['"].*['"])?\)$/m) > -1) {
-  	      url = '';
-  	    } else if (!url) {
-  	      if (!linkId) {
-  	        // lower-case and turn embedded newlines into spaces
-  	        linkId = linkText.toLowerCase().replace(/ ?\n/g, ' ');
-  	      }
-  	      url = '#' + linkId;
-
-  	      if (!showdown.helper.isUndefined(globals.gUrls[linkId])) {
-  	        url = globals.gUrls[linkId];
-  	        if (!showdown.helper.isUndefined(globals.gTitles[linkId])) {
-  	          title = globals.gTitles[linkId];
-  	        }
-  	      } else {
-  	        return wholeMatch;
-  	      }
-  	    }
-
-  	    //url = showdown.helper.escapeCharacters(url, '*_', false); // replaced line to improve performance
-  	    url = url.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
-
-  	    var result = '<a href="' + url + '"';
-
-  	    if (title !== '' && title !== null) {
-  	      title = title.replace(/"/g, '&quot;');
-  	      //title = showdown.helper.escapeCharacters(title, '*_', false); // replaced line to improve performance
-  	      title = title.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
-  	      result += ' title="' + title + '"';
-  	    }
-
-  	    // optionLinksInNewWindow only applies
-  	    // to external links. Hash links (#) open in same page
-  	    if (options.openLinksInNewWindow && !/^#/.test(url)) {
-  	      // escaped _
-  	      result += ' rel="noopener noreferrer" target="¨E95Eblank"';
-  	    }
-
-  	    result += '>' + linkText + '</a>';
-
-  	    return result;
-  	  };
-
-  	  // First, handle reference-style links: [link text] [id]
-  	  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)] ?(?:\n *)?\[(.*?)]()()()()/g, writeAnchorTag);
-
-  	  // Next, inline-style links: [link text](url "optional title")
-  	  // cases with crazy urls like ./image/cat1).png
-  	  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)]()[ \t]*\([ \t]?<([^>]*)>(?:[ \t]*((["'])([^"]*?)\5))?[ \t]?\)/g,
-  	    writeAnchorTag);
-
-  	  // normal cases
-  	  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)]()[ \t]*\([ \t]?<?([\S]+?(?:\([\S]*?\)[\S]*?)?)>?(?:[ \t]*((["'])([^"]*?)\5))?[ \t]?\)/g,
-  	    writeAnchorTag);
-
-  	  // handle reference-style shortcuts: [link text]
-  	  // These must come last in case you've also got [link test][1]
-  	  // or [link test](/foo)
-  	  text = text.replace(/\[([^\[\]]+)]()()()()()/g, writeAnchorTag);
-
-  	  // Lastly handle GithubMentions if option is enabled
-  	  if (options.ghMentions) {
-  	    text = text.replace(/(^|\s)(\\)?(@([a-z\d]+(?:[a-z\d.-]+?[a-z\d]+)*))/gmi, function (wm, st, escape, mentions, username) {
-  	      if (escape === '\\') {
-  	        return st + mentions;
-  	      }
-
-  	      //check if options.ghMentionsLink is a string
-  	      if (!showdown.helper.isString(options.ghMentionsLink)) {
-  	        throw new Error('ghMentionsLink option must be a string');
-  	      }
-  	      var lnk = options.ghMentionsLink.replace(/\{u}/g, username),
-  	          target = '';
-  	      if (options.openLinksInNewWindow) {
-  	        target = ' rel="noopener noreferrer" target="¨E95Eblank"';
-  	      }
-  	      return st + '<a href="' + lnk + '"' + target + '>' + mentions + '</a>';
-  	    });
-  	  }
-
-  	  text = globals.converter._dispatch('anchors.after', text, options, globals);
-  	  return text;
-  	});
-
-  	// url allowed chars [a-z\d_.~:/?#[]@!$&'()*+,;=-]
-
-  	var simpleURLRegex  = /([*~_]+|\b)(((https?|ftp|dict):\/\/|www\.)[^'">\s]+?\.[^'">\s]+?)()(\1)?(?=\s|$)(?!["<>])/gi,
-  	    simpleURLRegex2 = /([*~_]+|\b)(((https?|ftp|dict):\/\/|www\.)[^'">\s]+\.[^'">\s]+?)([.!?,()\[\]])?(\1)?(?=\s|$)(?!["<>])/gi,
-  	    delimUrlRegex   = /()<(((https?|ftp|dict):\/\/|www\.)[^'">\s]+)()>()/gi,
-  	    simpleMailRegex = /(^|\s)(?:mailto:)?([A-Za-z0-9!#$%&'*+-/=?^_`{|}~.]+@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)(?=$|\s)/gmi,
-  	    delimMailRegex  = /<()(?:mailto:)?([-.\w]+@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
-
-  	    replaceLink = function (options) {
-  	      return function (wm, leadingMagicChars, link, m2, m3, trailingPunctuation, trailingMagicChars) {
-  	        link = link.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
-  	        var lnkTxt = link,
-  	            append = '',
-  	            target = '',
-  	            lmc    = leadingMagicChars || '',
-  	            tmc    = trailingMagicChars || '';
-  	        if (/^www\./i.test(link)) {
-  	          link = link.replace(/^www\./i, 'http://www.');
-  	        }
-  	        if (options.excludeTrailingPunctuationFromURLs && trailingPunctuation) {
-  	          append = trailingPunctuation;
-  	        }
-  	        if (options.openLinksInNewWindow) {
-  	          target = ' rel="noopener noreferrer" target="¨E95Eblank"';
-  	        }
-  	        return lmc + '<a href="' + link + '"' + target + '>' + lnkTxt + '</a>' + append + tmc;
-  	      };
-  	    },
-
-  	    replaceMail = function (options, globals) {
-  	      return function (wholeMatch, b, mail) {
-  	        var href = 'mailto:';
-  	        b = b || '';
-  	        mail = showdown.subParser('unescapeSpecialChars')(mail, options, globals);
-  	        if (options.encodeEmails) {
-  	          href = showdown.helper.encodeEmailAddress(href + mail);
-  	          mail = showdown.helper.encodeEmailAddress(mail);
-  	        } else {
-  	          href = href + mail;
-  	        }
-  	        return b + '<a href="' + href + '">' + mail + '</a>';
-  	      };
-  	    };
-
-  	showdown.subParser('autoLinks', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('autoLinks.before', text, options, globals);
-
-  	  text = text.replace(delimUrlRegex, replaceLink(options));
-  	  text = text.replace(delimMailRegex, replaceMail(options, globals));
-
-  	  text = globals.converter._dispatch('autoLinks.after', text, options, globals);
-
-  	  return text;
-  	});
-
-  	showdown.subParser('simplifiedAutoLinks', function (text, options, globals) {
-
-  	  if (!options.simplifiedAutoLink) {
-  	    return text;
-  	  }
-
-  	  text = globals.converter._dispatch('simplifiedAutoLinks.before', text, options, globals);
-
-  	  if (options.excludeTrailingPunctuationFromURLs) {
-  	    text = text.replace(simpleURLRegex2, replaceLink(options));
-  	  } else {
-  	    text = text.replace(simpleURLRegex, replaceLink(options));
-  	  }
-  	  text = text.replace(simpleMailRegex, replaceMail(options, globals));
-
-  	  text = globals.converter._dispatch('simplifiedAutoLinks.after', text, options, globals);
-
-  	  return text;
-  	});
-
-  	/**
-  	 * These are all the transformations that form block-level
-  	 * tags like paragraphs, headers, and list items.
-  	 */
-  	showdown.subParser('blockGamut', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('blockGamut.before', text, options, globals);
-
-  	  // we parse blockquotes first so that we can have headings and hrs
-  	  // inside blockquotes
-  	  text = showdown.subParser('blockQuotes')(text, options, globals);
-  	  text = showdown.subParser('headers')(text, options, globals);
-
-  	  // Do Horizontal Rules:
-  	  text = showdown.subParser('horizontalRule')(text, options, globals);
-
-  	  text = showdown.subParser('lists')(text, options, globals);
-  	  text = showdown.subParser('codeBlocks')(text, options, globals);
-  	  text = showdown.subParser('tables')(text, options, globals);
-
-  	  // We already ran _HashHTMLBlocks() before, in Markdown(), but that
-  	  // was to escape raw HTML in the original Markdown source. This time,
-  	  // we're escaping the markup we've just created, so that we don't wrap
-  	  // <p> tags around block-level tags.
-  	  text = showdown.subParser('hashHTMLBlocks')(text, options, globals);
-  	  text = showdown.subParser('paragraphs')(text, options, globals);
-
-  	  text = globals.converter._dispatch('blockGamut.after', text, options, globals);
-
-  	  return text;
-  	});
-
-  	showdown.subParser('blockQuotes', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('blockQuotes.before', text, options, globals);
-
-  	  // add a couple extra lines after the text and endtext mark
-  	  text = text + '\n\n';
-
-  	  var rgx = /(^ {0,3}>[ \t]?.+\n(.+\n)*\n*)+/gm;
-
-  	  if (options.splitAdjacentBlockquotes) {
-  	    rgx = /^ {0,3}>[\s\S]*?(?:\n\n)/gm;
-  	  }
-
-  	  text = text.replace(rgx, function (bq) {
-  	    // attacklab: hack around Konqueror 3.5.4 bug:
-  	    // "----------bug".replace(/^-/g,"") == "bug"
-  	    bq = bq.replace(/^[ \t]*>[ \t]?/gm, ''); // trim one level of quoting
-
-  	    // attacklab: clean up hack
-  	    bq = bq.replace(/¨0/g, '');
-
-  	    bq = bq.replace(/^[ \t]+$/gm, ''); // trim whitespace-only lines
-  	    bq = showdown.subParser('githubCodeBlocks')(bq, options, globals);
-  	    bq = showdown.subParser('blockGamut')(bq, options, globals); // recurse
-
-  	    bq = bq.replace(/(^|\n)/g, '$1  ');
-  	    // These leading spaces screw with <pre> content, so we need to fix that:
-  	    bq = bq.replace(/(\s*<pre>[^\r]+?<\/pre>)/gm, function (wholeMatch, m1) {
-  	      var pre = m1;
-  	      // attacklab: hack around Konqueror 3.5.4 bug:
-  	      pre = pre.replace(/^  /mg, '¨0');
-  	      pre = pre.replace(/¨0/g, '');
-  	      return pre;
-  	    });
-
-  	    return showdown.subParser('hashBlock')('<blockquote>\n' + bq + '\n</blockquote>', options, globals);
-  	  });
-
-  	  text = globals.converter._dispatch('blockQuotes.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Process Markdown `<pre><code>` blocks.
-  	 */
-  	showdown.subParser('codeBlocks', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('codeBlocks.before', text, options, globals);
-
-  	  // sentinel workarounds for lack of \A and \Z, safari\khtml bug
-  	  text += '¨0';
-
-  	  var pattern = /(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=¨0))/g;
-  	  text = text.replace(pattern, function (wholeMatch, m1, m2) {
-  	    var codeblock = m1,
-  	        nextChar = m2,
-  	        end = '\n';
-
-  	    codeblock = showdown.subParser('outdent')(codeblock, options, globals);
-  	    codeblock = showdown.subParser('encodeCode')(codeblock, options, globals);
-  	    codeblock = showdown.subParser('detab')(codeblock, options, globals);
-  	    codeblock = codeblock.replace(/^\n+/g, ''); // trim leading newlines
-  	    codeblock = codeblock.replace(/\n+$/g, ''); // trim trailing newlines
-
-  	    if (options.omitExtraWLInCodeBlocks) {
-  	      end = '';
-  	    }
-
-  	    codeblock = '<pre><code>' + codeblock + end + '</code></pre>';
-
-  	    return showdown.subParser('hashBlock')(codeblock, options, globals) + nextChar;
-  	  });
-
-  	  // strip sentinel
-  	  text = text.replace(/¨0/, '');
-
-  	  text = globals.converter._dispatch('codeBlocks.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 *
-  	 *   *  Backtick quotes are used for <code></code> spans.
-  	 *
-  	 *   *  You can use multiple backticks as the delimiters if you want to
-  	 *     include literal backticks in the code span. So, this input:
-  	 *
-  	 *         Just type ``foo `bar` baz`` at the prompt.
-  	 *
-  	 *       Will translate to:
-  	 *
-  	 *         <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
-  	 *
-  	 *    There's no arbitrary limit to the number of backticks you
-  	 *    can use as delimters. If you need three consecutive backticks
-  	 *    in your code, use four for delimiters, etc.
-  	 *
-  	 *  *  You can use spaces to get literal backticks at the edges:
-  	 *
-  	 *         ... type `` `bar` `` ...
-  	 *
-  	 *       Turns to:
-  	 *
-  	 *         ... type <code>`bar`</code> ...
-  	 */
-  	showdown.subParser('codeSpans', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('codeSpans.before', text, options, globals);
-
-  	  if (typeof (text) === 'undefined') {
-  	    text = '';
-  	  }
-  	  text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
-  	    function (wholeMatch, m1, m2, m3) {
-  	      var c = m3;
-  	      c = c.replace(/^([ \t]*)/g, '');	// leading whitespace
-  	      c = c.replace(/[ \t]*$/g, '');	// trailing whitespace
-  	      c = showdown.subParser('encodeCode')(c, options, globals);
-  	      c = m1 + '<code>' + c + '</code>';
-  	      c = showdown.subParser('hashHTMLSpans')(c, options, globals);
-  	      return c;
-  	    }
-  	  );
-
-  	  text = globals.converter._dispatch('codeSpans.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Create a full HTML document from the processed markdown
-  	 */
-  	showdown.subParser('completeHTMLDocument', function (text, options, globals) {
-
-  	  if (!options.completeHTMLDocument) {
-  	    return text;
-  	  }
-
-  	  text = globals.converter._dispatch('completeHTMLDocument.before', text, options, globals);
-
-  	  var doctype = 'html',
-  	      doctypeParsed = '<!DOCTYPE HTML>\n',
-  	      title = '',
-  	      charset = '<meta charset="utf-8">\n',
-  	      lang = '',
-  	      metadata = '';
-
-  	  if (typeof globals.metadata.parsed.doctype !== 'undefined') {
-  	    doctypeParsed = '<!DOCTYPE ' +  globals.metadata.parsed.doctype + '>\n';
-  	    doctype = globals.metadata.parsed.doctype.toString().toLowerCase();
-  	    if (doctype === 'html' || doctype === 'html5') {
-  	      charset = '<meta charset="utf-8">';
-  	    }
-  	  }
-
-  	  for (var meta in globals.metadata.parsed) {
-  	    if (globals.metadata.parsed.hasOwnProperty(meta)) {
-  	      switch (meta.toLowerCase()) {
-  	        case 'doctype':
-  	          break;
-
-  	        case 'title':
-  	          title = '<title>' +  globals.metadata.parsed.title + '</title>\n';
-  	          break;
-
-  	        case 'charset':
-  	          if (doctype === 'html' || doctype === 'html5') {
-  	            charset = '<meta charset="' + globals.metadata.parsed.charset + '">\n';
-  	          } else {
-  	            charset = '<meta name="charset" content="' + globals.metadata.parsed.charset + '">\n';
-  	          }
-  	          break;
-
-  	        case 'language':
-  	        case 'lang':
-  	          lang = ' lang="' + globals.metadata.parsed[meta] + '"';
-  	          metadata += '<meta name="' + meta + '" content="' + globals.metadata.parsed[meta] + '">\n';
-  	          break;
-
-  	        default:
-  	          metadata += '<meta name="' + meta + '" content="' + globals.metadata.parsed[meta] + '">\n';
-  	      }
-  	    }
-  	  }
-
-  	  text = doctypeParsed + '<html' + lang + '>\n<head>\n' + title + charset + metadata + '</head>\n<body>\n' + text.trim() + '\n</body>\n</html>';
-
-  	  text = globals.converter._dispatch('completeHTMLDocument.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Convert all tabs to spaces
-  	 */
-  	showdown.subParser('detab', function (text, options, globals) {
-  	  text = globals.converter._dispatch('detab.before', text, options, globals);
-
-  	  // expand first n-1 tabs
-  	  text = text.replace(/\t(?=\t)/g, '    '); // g_tab_width
-
-  	  // replace the nth with two sentinels
-  	  text = text.replace(/\t/g, '¨A¨B');
-
-  	  // use the sentinel to anchor our regex so it doesn't explode
-  	  text = text.replace(/¨B(.+?)¨A/g, function (wholeMatch, m1) {
-  	    var leadingText = m1,
-  	        numSpaces = 4 - leadingText.length % 4;  // g_tab_width
-
-  	    // there *must* be a better way to do this:
-  	    for (var i = 0; i < numSpaces; i++) {
-  	      leadingText += ' ';
-  	    }
-
-  	    return leadingText;
-  	  });
-
-  	  // clean up sentinels
-  	  text = text.replace(/¨A/g, '    ');  // g_tab_width
-  	  text = text.replace(/¨B/g, '');
-
-  	  text = globals.converter._dispatch('detab.after', text, options, globals);
-  	  return text;
-  	});
-
-  	showdown.subParser('ellipsis', function (text, options, globals) {
-
-  	  if (!options.ellipsis) {
-  	    return text;
-  	  }
-
-  	  text = globals.converter._dispatch('ellipsis.before', text, options, globals);
-
-  	  text = text.replace(/\.\.\./g, '…');
-
-  	  text = globals.converter._dispatch('ellipsis.after', text, options, globals);
-
-  	  return text;
-  	});
-
-  	/**
-  	 * Turn emoji codes into emojis
-  	 *
-  	 * List of supported emojis: https://github.com/showdownjs/showdown/wiki/Emojis
-  	 */
-  	showdown.subParser('emoji', function (text, options, globals) {
-
-  	  if (!options.emoji) {
-  	    return text;
-  	  }
-
-  	  text = globals.converter._dispatch('emoji.before', text, options, globals);
-
-  	  var emojiRgx = /:([\S]+?):/g;
-
-  	  text = text.replace(emojiRgx, function (wm, emojiCode) {
-  	    if (showdown.helper.emojis.hasOwnProperty(emojiCode)) {
-  	      return showdown.helper.emojis[emojiCode];
-  	    }
-  	    return wm;
-  	  });
-
-  	  text = globals.converter._dispatch('emoji.after', text, options, globals);
-
-  	  return text;
-  	});
-
-  	/**
-  	 * Smart processing for ampersands and angle brackets that need to be encoded.
-  	 */
-  	showdown.subParser('encodeAmpsAndAngles', function (text, options, globals) {
-  	  text = globals.converter._dispatch('encodeAmpsAndAngles.before', text, options, globals);
-
-  	  // Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
-  	  // http://bumppo.net/projects/amputator/
-  	  text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g, '&amp;');
-
-  	  // Encode naked <'s
-  	  text = text.replace(/<(?![a-z\/?$!])/gi, '&lt;');
-
-  	  // Encode <
-  	  text = text.replace(/</g, '&lt;');
-
-  	  // Encode >
-  	  text = text.replace(/>/g, '&gt;');
-
-  	  text = globals.converter._dispatch('encodeAmpsAndAngles.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Returns the string, with after processing the following backslash escape sequences.
-  	 *
-  	 * attacklab: The polite way to do this is with the new escapeCharacters() function:
-  	 *
-  	 *    text = escapeCharacters(text,"\\",true);
-  	 *    text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
-  	 *
-  	 * ...but we're sidestepping its use of the (slow) RegExp constructor
-  	 * as an optimization for Firefox.  This function gets called a LOT.
-  	 */
-  	showdown.subParser('encodeBackslashEscapes', function (text, options, globals) {
-  	  text = globals.converter._dispatch('encodeBackslashEscapes.before', text, options, globals);
-
-  	  text = text.replace(/\\(\\)/g, showdown.helper.escapeCharactersCallback);
-  	  text = text.replace(/\\([`*_{}\[\]()>#+.!~=|:-])/g, showdown.helper.escapeCharactersCallback);
-
-  	  text = globals.converter._dispatch('encodeBackslashEscapes.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Encode/escape certain characters inside Markdown code runs.
-  	 * The point is that in code, these characters are literals,
-  	 * and lose their special Markdown meanings.
-  	 */
-  	showdown.subParser('encodeCode', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('encodeCode.before', text, options, globals);
-
-  	  // Encode all ampersands; HTML entities are not
-  	  // entities within a Markdown code span.
-  	  text = text
-  	    .replace(/&/g, '&amp;')
-  	  // Do the angle bracket song and dance:
-  	    .replace(/</g, '&lt;')
-  	    .replace(/>/g, '&gt;')
-  	  // Now, escape characters that are magic in Markdown:
-  	    .replace(/([*_{}\[\]\\=~-])/g, showdown.helper.escapeCharactersCallback);
-
-  	  text = globals.converter._dispatch('encodeCode.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Within tags -- meaning between < and > -- encode [\ ` * _ ~ =] so they
-  	 * don't conflict with their use in Markdown for code, italics and strong.
-  	 */
-  	showdown.subParser('escapeSpecialCharsWithinTagAttributes', function (text, options, globals) {
-  	  text = globals.converter._dispatch('escapeSpecialCharsWithinTagAttributes.before', text, options, globals);
-
-  	  // Build a regex to find HTML tags.
-  	  var tags     = /<\/?[a-z\d_:-]+(?:[\s]+[\s\S]+?)?>/gi,
-  	      comments = /<!(--(?:(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>/gi;
-
-  	  text = text.replace(tags, function (wholeMatch) {
-  	    return wholeMatch
-  	      .replace(/(.)<\/?code>(?=.)/g, '$1`')
-  	      .replace(/([\\`*_~=|])/g, showdown.helper.escapeCharactersCallback);
-  	  });
-
-  	  text = text.replace(comments, function (wholeMatch) {
-  	    return wholeMatch
-  	      .replace(/([\\`*_~=|])/g, showdown.helper.escapeCharactersCallback);
-  	  });
-
-  	  text = globals.converter._dispatch('escapeSpecialCharsWithinTagAttributes.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Handle github codeblocks prior to running HashHTML so that
-  	 * HTML contained within the codeblock gets escaped properly
-  	 * Example:
-  	 * ```ruby
-  	 *     def hello_world(x)
-  	 *       puts "Hello, #{x}"
-  	 *     end
-  	 * ```
-  	 */
-  	showdown.subParser('githubCodeBlocks', function (text, options, globals) {
-
-  	  // early exit if option is not enabled
-  	  if (!options.ghCodeBlocks) {
-  	    return text;
-  	  }
-
-  	  text = globals.converter._dispatch('githubCodeBlocks.before', text, options, globals);
-
-  	  text += '¨0';
-
-  	  text = text.replace(/(?:^|\n)(?: {0,3})(```+|~~~+)(?: *)([^\s`~]*)\n([\s\S]*?)\n(?: {0,3})\1/g, function (wholeMatch, delim, language, codeblock) {
-  	    var end = (options.omitExtraWLInCodeBlocks) ? '' : '\n';
-
-  	    // First parse the github code block
-  	    codeblock = showdown.subParser('encodeCode')(codeblock, options, globals);
-  	    codeblock = showdown.subParser('detab')(codeblock, options, globals);
-  	    codeblock = codeblock.replace(/^\n+/g, ''); // trim leading newlines
-  	    codeblock = codeblock.replace(/\n+$/g, ''); // trim trailing whitespace
-
-  	    codeblock = '<pre><code' + (language ? ' class="' + language + ' language-' + language + '"' : '') + '>' + codeblock + end + '</code></pre>';
-
-  	    codeblock = showdown.subParser('hashBlock')(codeblock, options, globals);
-
-  	    // Since GHCodeblocks can be false positives, we need to
-  	    // store the primitive text and the parsed text in a global var,
-  	    // and then return a token
-  	    return '\n\n¨G' + (globals.ghCodeBlocks.push({text: wholeMatch, codeblock: codeblock}) - 1) + 'G\n\n';
-  	  });
-
-  	  // attacklab: strip sentinel
-  	  text = text.replace(/¨0/, '');
-
-  	  return globals.converter._dispatch('githubCodeBlocks.after', text, options, globals);
-  	});
-
-  	showdown.subParser('hashBlock', function (text, options, globals) {
-  	  text = globals.converter._dispatch('hashBlock.before', text, options, globals);
-  	  text = text.replace(/(^\n+|\n+$)/g, '');
-  	  text = '\n\n¨K' + (globals.gHtmlBlocks.push(text) - 1) + 'K\n\n';
-  	  text = globals.converter._dispatch('hashBlock.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Hash and escape <code> elements that should not be parsed as markdown
-  	 */
-  	showdown.subParser('hashCodeTags', function (text, options, globals) {
-  	  text = globals.converter._dispatch('hashCodeTags.before', text, options, globals);
-
-  	  var repFunc = function (wholeMatch, match, left, right) {
-  	    var codeblock = left + showdown.subParser('encodeCode')(match, options, globals) + right;
-  	    return '¨C' + (globals.gHtmlSpans.push(codeblock) - 1) + 'C';
-  	  };
-
-  	  // Hash naked <code>
-  	  text = showdown.helper.replaceRecursiveRegExp(text, repFunc, '<code\\b[^>]*>', '</code>', 'gim');
-
-  	  text = globals.converter._dispatch('hashCodeTags.after', text, options, globals);
-  	  return text;
-  	});
-
-  	showdown.subParser('hashElement', function (text, options, globals) {
-
-  	  return function (wholeMatch, m1) {
-  	    var blockText = m1;
-
-  	    // Undo double lines
-  	    blockText = blockText.replace(/\n\n/g, '\n');
-  	    blockText = blockText.replace(/^\n/, '');
-
-  	    // strip trailing blank lines
-  	    blockText = blockText.replace(/\n+$/g, '');
-
-  	    // Replace the element text with a marker ("¨KxK" where x is its key)
-  	    blockText = '\n\n¨K' + (globals.gHtmlBlocks.push(blockText) - 1) + 'K\n\n';
-
-  	    return blockText;
-  	  };
-  	});
-
-  	showdown.subParser('hashHTMLBlocks', function (text, options, globals) {
-  	  text = globals.converter._dispatch('hashHTMLBlocks.before', text, options, globals);
-
-  	  var blockTags = [
-  	        'pre',
-  	        'div',
-  	        'h1',
-  	        'h2',
-  	        'h3',
-  	        'h4',
-  	        'h5',
-  	        'h6',
-  	        'blockquote',
-  	        'table',
-  	        'dl',
-  	        'ol',
-  	        'ul',
-  	        'script',
-  	        'noscript',
-  	        'form',
-  	        'fieldset',
-  	        'iframe',
-  	        'math',
-  	        'style',
-  	        'section',
-  	        'header',
-  	        'footer',
-  	        'nav',
-  	        'article',
-  	        'aside',
-  	        'address',
-  	        'audio',
-  	        'canvas',
-  	        'figure',
-  	        'hgroup',
-  	        'output',
-  	        'video',
-  	        'p'
-  	      ],
-  	      repFunc = function (wholeMatch, match, left, right) {
-  	        var txt = wholeMatch;
-  	        // check if this html element is marked as markdown
-  	        // if so, it's contents should be parsed as markdown
-  	        if (left.search(/\bmarkdown\b/) !== -1) {
-  	          txt = left + globals.converter.makeHtml(match) + right;
-  	        }
-  	        return '\n\n¨K' + (globals.gHtmlBlocks.push(txt) - 1) + 'K\n\n';
-  	      };
-
-  	  if (options.backslashEscapesHTMLTags) {
-  	    // encode backslash escaped HTML tags
-  	    text = text.replace(/\\<(\/?[^>]+?)>/g, function (wm, inside) {
-  	      return '&lt;' + inside + '&gt;';
-  	    });
-  	  }
-
-  	  // hash HTML Blocks
-  	  for (var i = 0; i < blockTags.length; ++i) {
-
-  	    var opTagPos,
-  	        rgx1     = new RegExp('^ {0,3}(<' + blockTags[i] + '\\b[^>]*>)', 'im'),
-  	        patLeft  = '<' + blockTags[i] + '\\b[^>]*>',
-  	        patRight = '</' + blockTags[i] + '>';
-  	    // 1. Look for the first position of the first opening HTML tag in the text
-  	    while ((opTagPos = showdown.helper.regexIndexOf(text, rgx1)) !== -1) {
-
-  	      // if the HTML tag is \ escaped, we need to escape it and break
-
-
-  	      //2. Split the text in that position
-  	      var subTexts = showdown.helper.splitAtIndex(text, opTagPos),
-  	          //3. Match recursively
-  	          newSubText1 = showdown.helper.replaceRecursiveRegExp(subTexts[1], repFunc, patLeft, patRight, 'im');
-
-  	      // prevent an infinite loop
-  	      if (newSubText1 === subTexts[1]) {
-  	        break;
-  	      }
-  	      text = subTexts[0].concat(newSubText1);
-  	    }
-  	  }
-  	  // HR SPECIAL CASE
-  	  text = text.replace(/(\n {0,3}(<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,
-  	    showdown.subParser('hashElement')(text, options, globals));
-
-  	  // Special case for standalone HTML comments
-  	  text = showdown.helper.replaceRecursiveRegExp(text, function (txt) {
-  	    return '\n\n¨K' + (globals.gHtmlBlocks.push(txt) - 1) + 'K\n\n';
-  	  }, '^ {0,3}<!--', '-->', 'gm');
-
-  	  // PHP and ASP-style processor instructions (<?...?> and <%...%>)
-  	  text = text.replace(/(?:\n\n)( {0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,
-  	    showdown.subParser('hashElement')(text, options, globals));
-
-  	  text = globals.converter._dispatch('hashHTMLBlocks.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Hash span elements that should not be parsed as markdown
-  	 */
-  	showdown.subParser('hashHTMLSpans', function (text, options, globals) {
-  	  text = globals.converter._dispatch('hashHTMLSpans.before', text, options, globals);
-
-  	  function hashHTMLSpan (html) {
-  	    return '¨C' + (globals.gHtmlSpans.push(html) - 1) + 'C';
-  	  }
-
-  	  // Hash Self Closing tags
-  	  text = text.replace(/<[^>]+?\/>/gi, function (wm) {
-  	    return hashHTMLSpan(wm);
-  	  });
-
-  	  // Hash tags without properties
-  	  text = text.replace(/<([^>]+?)>[\s\S]*?<\/\1>/g, function (wm) {
-  	    return hashHTMLSpan(wm);
-  	  });
-
-  	  // Hash tags with properties
-  	  text = text.replace(/<([^>]+?)\s[^>]+?>[\s\S]*?<\/\1>/g, function (wm) {
-  	    return hashHTMLSpan(wm);
-  	  });
-
-  	  // Hash self closing tags without />
-  	  text = text.replace(/<[^>]+?>/gi, function (wm) {
-  	    return hashHTMLSpan(wm);
-  	  });
-
-  	  /*showdown.helper.matchRecursiveRegExp(text, '<code\\b[^>]*>', '</code>', 'gi');*/
-
-  	  text = globals.converter._dispatch('hashHTMLSpans.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Unhash HTML spans
-  	 */
-  	showdown.subParser('unhashHTMLSpans', function (text, options, globals) {
-  	  text = globals.converter._dispatch('unhashHTMLSpans.before', text, options, globals);
-
-  	  for (var i = 0; i < globals.gHtmlSpans.length; ++i) {
-  	    var repText = globals.gHtmlSpans[i],
-  	        // limiter to prevent infinite loop (assume 10 as limit for recurse)
-  	        limit = 0;
-
-  	    while (/¨C(\d+)C/.test(repText)) {
-  	      var num = RegExp.$1;
-  	      repText = repText.replace('¨C' + num + 'C', globals.gHtmlSpans[num]);
-  	      if (limit === 10) {
-  	        console.error('maximum nesting of 10 spans reached!!!');
-  	        break;
-  	      }
-  	      ++limit;
-  	    }
-  	    text = text.replace('¨C' + i + 'C', repText);
-  	  }
-
-  	  text = globals.converter._dispatch('unhashHTMLSpans.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Hash and escape <pre><code> elements that should not be parsed as markdown
-  	 */
-  	showdown.subParser('hashPreCodeTags', function (text, options, globals) {
-  	  text = globals.converter._dispatch('hashPreCodeTags.before', text, options, globals);
-
-  	  var repFunc = function (wholeMatch, match, left, right) {
-  	    // encode html entities
-  	    var codeblock = left + showdown.subParser('encodeCode')(match, options, globals) + right;
-  	    return '\n\n¨G' + (globals.ghCodeBlocks.push({text: wholeMatch, codeblock: codeblock}) - 1) + 'G\n\n';
-  	  };
-
-  	  // Hash <pre><code>
-  	  text = showdown.helper.replaceRecursiveRegExp(text, repFunc, '^ {0,3}<pre\\b[^>]*>\\s*<code\\b[^>]*>', '^ {0,3}</code>\\s*</pre>', 'gim');
-
-  	  text = globals.converter._dispatch('hashPreCodeTags.after', text, options, globals);
-  	  return text;
-  	});
-
-  	showdown.subParser('headers', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('headers.before', text, options, globals);
-
-  	  var headerLevelStart = (isNaN(parseInt(options.headerLevelStart))) ? 1 : parseInt(options.headerLevelStart),
-
-  	      // Set text-style headers:
-  	      //	Header 1
-  	      //	========
-  	      //
-  	      //	Header 2
-  	      //	--------
-  	      //
-  	      setextRegexH1 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n={2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n=+[ \t]*\n+/gm,
-  	      setextRegexH2 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n-{2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n-+[ \t]*\n+/gm;
-
-  	  text = text.replace(setextRegexH1, function (wholeMatch, m1) {
-
-  	    var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
-  	        hID = (options.noHeaderId) ? '' : ' id="' + headerId(m1) + '"',
-  	        hLevel = headerLevelStart,
-  	        hashBlock = '<h' + hLevel + hID + '>' + spanGamut + '</h' + hLevel + '>';
-  	    return showdown.subParser('hashBlock')(hashBlock, options, globals);
-  	  });
-
-  	  text = text.replace(setextRegexH2, function (matchFound, m1) {
-  	    var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
-  	        hID = (options.noHeaderId) ? '' : ' id="' + headerId(m1) + '"',
-  	        hLevel = headerLevelStart + 1,
-  	        hashBlock = '<h' + hLevel + hID + '>' + spanGamut + '</h' + hLevel + '>';
-  	    return showdown.subParser('hashBlock')(hashBlock, options, globals);
-  	  });
-
-  	  // atx-style headers:
-  	  //  # Header 1
-  	  //  ## Header 2
-  	  //  ## Header 2 with closing hashes ##
-  	  //  ...
-  	  //  ###### Header 6
-  	  //
-  	  var atxStyle = (options.requireSpaceBeforeHeadingText) ? /^(#{1,6})[ \t]+(.+?)[ \t]*#*\n+/gm : /^(#{1,6})[ \t]*(.+?)[ \t]*#*\n+/gm;
-
-  	  text = text.replace(atxStyle, function (wholeMatch, m1, m2) {
-  	    var hText = m2;
-  	    if (options.customizedHeaderId) {
-  	      hText = m2.replace(/\s?\{([^{]+?)}\s*$/, '');
-  	    }
-
-  	    var span = showdown.subParser('spanGamut')(hText, options, globals),
-  	        hID = (options.noHeaderId) ? '' : ' id="' + headerId(m2) + '"',
-  	        hLevel = headerLevelStart - 1 + m1.length,
-  	        header = '<h' + hLevel + hID + '>' + span + '</h' + hLevel + '>';
-
-  	    return showdown.subParser('hashBlock')(header, options, globals);
-  	  });
-
-  	  function headerId (m) {
-  	    var title,
-  	        prefix;
-
-  	    // It is separate from other options to allow combining prefix and customized
-  	    if (options.customizedHeaderId) {
-  	      var match = m.match(/\{([^{]+?)}\s*$/);
-  	      if (match && match[1]) {
-  	        m = match[1];
-  	      }
-  	    }
-
-  	    title = m;
-
-  	    // Prefix id to prevent causing inadvertent pre-existing style matches.
-  	    if (showdown.helper.isString(options.prefixHeaderId)) {
-  	      prefix = options.prefixHeaderId;
-  	    } else if (options.prefixHeaderId === true) {
-  	      prefix = 'section-';
-  	    } else {
-  	      prefix = '';
-  	    }
-
-  	    if (!options.rawPrefixHeaderId) {
-  	      title = prefix + title;
-  	    }
-
-  	    if (options.ghCompatibleHeaderId) {
-  	      title = title
-  	        .replace(/ /g, '-')
-  	        // replace previously escaped chars (&, ¨ and $)
-  	        .replace(/&amp;/g, '')
-  	        .replace(/¨T/g, '')
-  	        .replace(/¨D/g, '')
-  	        // replace rest of the chars (&~$ are repeated as they might have been escaped)
-  	        // borrowed from github's redcarpet (some they should produce similar results)
-  	        .replace(/[&+$,\/:;=?@"#{}|^¨~\[\]`\\*)(%.!'<>]/g, '')
-  	        .toLowerCase();
-  	    } else if (options.rawHeaderId) {
-  	      title = title
-  	        .replace(/ /g, '-')
-  	        // replace previously escaped chars (&, ¨ and $)
-  	        .replace(/&amp;/g, '&')
-  	        .replace(/¨T/g, '¨')
-  	        .replace(/¨D/g, '$')
-  	        // replace " and '
-  	        .replace(/["']/g, '-')
-  	        .toLowerCase();
-  	    } else {
-  	      title = title
-  	        .replace(/[^\w]/g, '')
-  	        .toLowerCase();
-  	    }
-
-  	    if (options.rawPrefixHeaderId) {
-  	      title = prefix + title;
-  	    }
-
-  	    if (globals.hashLinkCounts[title]) {
-  	      title = title + '-' + (globals.hashLinkCounts[title]++);
-  	    } else {
-  	      globals.hashLinkCounts[title] = 1;
-  	    }
-  	    return title;
-  	  }
-
-  	  text = globals.converter._dispatch('headers.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Turn Markdown link shortcuts into XHTML <a> tags.
-  	 */
-  	showdown.subParser('horizontalRule', function (text, options, globals) {
-  	  text = globals.converter._dispatch('horizontalRule.before', text, options, globals);
-
-  	  var key = showdown.subParser('hashBlock')('<hr />', options, globals);
-  	  text = text.replace(/^ {0,2}( ?-){3,}[ \t]*$/gm, key);
-  	  text = text.replace(/^ {0,2}( ?\*){3,}[ \t]*$/gm, key);
-  	  text = text.replace(/^ {0,2}( ?_){3,}[ \t]*$/gm, key);
-
-  	  text = globals.converter._dispatch('horizontalRule.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Turn Markdown image shortcuts into <img> tags.
-  	 */
-  	showdown.subParser('images', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('images.before', text, options, globals);
-
-  	  var inlineRegExp      = /!\[([^\]]*?)][ \t]*()\([ \t]?<?([\S]+?(?:\([\S]*?\)[\S]*?)?)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*(?:(["'])([^"]*?)\6)?[ \t]?\)/g,
-  	      crazyRegExp       = /!\[([^\]]*?)][ \t]*()\([ \t]?<([^>]*)>(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*(?:(?:(["'])([^"]*?)\6))?[ \t]?\)/g,
-  	      base64RegExp      = /!\[([^\]]*?)][ \t]*()\([ \t]?<?(data:.+?\/.+?;base64,[A-Za-z0-9+/=\n]+?)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*(?:(["'])([^"]*?)\6)?[ \t]?\)/g,
-  	      referenceRegExp   = /!\[([^\]]*?)] ?(?:\n *)?\[([\s\S]*?)]()()()()()/g,
-  	      refShortcutRegExp = /!\[([^\[\]]+)]()()()()()/g;
-
-  	  function writeImageTagBase64 (wholeMatch, altText, linkId, url, width, height, m5, title) {
-  	    url = url.replace(/\s/g, '');
-  	    return writeImageTag (wholeMatch, altText, linkId, url, width, height, m5, title);
-  	  }
-
-  	  function writeImageTag (wholeMatch, altText, linkId, url, width, height, m5, title) {
-
-  	    var gUrls   = globals.gUrls,
-  	        gTitles = globals.gTitles,
-  	        gDims   = globals.gDimensions;
-
-  	    linkId = linkId.toLowerCase();
-
-  	    if (!title) {
-  	      title = '';
-  	    }
-  	    // Special case for explicit empty url
-  	    if (wholeMatch.search(/\(<?\s*>? ?(['"].*['"])?\)$/m) > -1) {
-  	      url = '';
-
-  	    } else if (url === '' || url === null) {
-  	      if (linkId === '' || linkId === null) {
-  	        // lower-case and turn embedded newlines into spaces
-  	        linkId = altText.toLowerCase().replace(/ ?\n/g, ' ');
-  	      }
-  	      url = '#' + linkId;
-
-  	      if (!showdown.helper.isUndefined(gUrls[linkId])) {
-  	        url = gUrls[linkId];
-  	        if (!showdown.helper.isUndefined(gTitles[linkId])) {
-  	          title = gTitles[linkId];
-  	        }
-  	        if (!showdown.helper.isUndefined(gDims[linkId])) {
-  	          width = gDims[linkId].width;
-  	          height = gDims[linkId].height;
-  	        }
-  	      } else {
-  	        return wholeMatch;
-  	      }
-  	    }
-
-  	    altText = altText
-  	      .replace(/"/g, '&quot;')
-  	    //altText = showdown.helper.escapeCharacters(altText, '*_', false);
-  	      .replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
-  	    //url = showdown.helper.escapeCharacters(url, '*_', false);
-  	    url = url.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
-  	    var result = '<img src="' + url + '" alt="' + altText + '"';
-
-  	    if (title && showdown.helper.isString(title)) {
-  	      title = title
-  	        .replace(/"/g, '&quot;')
-  	      //title = showdown.helper.escapeCharacters(title, '*_', false);
-  	        .replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
-  	      result += ' title="' + title + '"';
-  	    }
-
-  	    if (width && height) {
-  	      width  = (width === '*') ? 'auto' : width;
-  	      height = (height === '*') ? 'auto' : height;
-
-  	      result += ' width="' + width + '"';
-  	      result += ' height="' + height + '"';
-  	    }
-
-  	    result += ' />';
-
-  	    return result;
-  	  }
-
-  	  // First, handle reference-style labeled images: ![alt text][id]
-  	  text = text.replace(referenceRegExp, writeImageTag);
-
-  	  // Next, handle inline images:  ![alt text](url =<width>x<height> "optional title")
-
-  	  // base64 encoded images
-  	  text = text.replace(base64RegExp, writeImageTagBase64);
-
-  	  // cases with crazy urls like ./image/cat1).png
-  	  text = text.replace(crazyRegExp, writeImageTag);
-
-  	  // normal cases
-  	  text = text.replace(inlineRegExp, writeImageTag);
-
-  	  // handle reference-style shortcuts: ![img text]
-  	  text = text.replace(refShortcutRegExp, writeImageTag);
-
-  	  text = globals.converter._dispatch('images.after', text, options, globals);
-  	  return text;
-  	});
-
-  	showdown.subParser('italicsAndBold', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('italicsAndBold.before', text, options, globals);
-
-  	  // it's faster to have 3 separate regexes for each case than have just one
-  	  // because of backtracing, in some cases, it could lead to an exponential effect
-  	  // called "catastrophic backtrace". Ominous!
-
-  	  function parseInside (txt, left, right) {
-  	    /*
-  	    if (options.simplifiedAutoLink) {
-  	      txt = showdown.subParser('simplifiedAutoLinks')(txt, options, globals);
-  	    }
-  	    */
-  	    return left + txt + right;
-  	  }
-
-  	  // Parse underscores
-  	  if (options.literalMidWordUnderscores) {
-  	    text = text.replace(/\b___(\S[\s\S]*?)___\b/g, function (wm, txt) {
-  	      return parseInside (txt, '<strong><em>', '</em></strong>');
-  	    });
-  	    text = text.replace(/\b__(\S[\s\S]*?)__\b/g, function (wm, txt) {
-  	      return parseInside (txt, '<strong>', '</strong>');
-  	    });
-  	    text = text.replace(/\b_(\S[\s\S]*?)_\b/g, function (wm, txt) {
-  	      return parseInside (txt, '<em>', '</em>');
-  	    });
-  	  } else {
-  	    text = text.replace(/___(\S[\s\S]*?)___/g, function (wm, m) {
-  	      return (/\S$/.test(m)) ? parseInside (m, '<strong><em>', '</em></strong>') : wm;
-  	    });
-  	    text = text.replace(/__(\S[\s\S]*?)__/g, function (wm, m) {
-  	      return (/\S$/.test(m)) ? parseInside (m, '<strong>', '</strong>') : wm;
-  	    });
-  	    text = text.replace(/_([^\s_][\s\S]*?)_/g, function (wm, m) {
-  	      // !/^_[^_]/.test(m) - test if it doesn't start with __ (since it seems redundant, we removed it)
-  	      return (/\S$/.test(m)) ? parseInside (m, '<em>', '</em>') : wm;
-  	    });
-  	  }
-
-  	  // Now parse asterisks
-  	  if (options.literalMidWordAsterisks) {
-  	    text = text.replace(/([^*]|^)\B\*\*\*(\S[\s\S]*?)\*\*\*\B(?!\*)/g, function (wm, lead, txt) {
-  	      return parseInside (txt, lead + '<strong><em>', '</em></strong>');
-  	    });
-  	    text = text.replace(/([^*]|^)\B\*\*(\S[\s\S]*?)\*\*\B(?!\*)/g, function (wm, lead, txt) {
-  	      return parseInside (txt, lead + '<strong>', '</strong>');
-  	    });
-  	    text = text.replace(/([^*]|^)\B\*(\S[\s\S]*?)\*\B(?!\*)/g, function (wm, lead, txt) {
-  	      return parseInside (txt, lead + '<em>', '</em>');
-  	    });
-  	  } else {
-  	    text = text.replace(/\*\*\*(\S[\s\S]*?)\*\*\*/g, function (wm, m) {
-  	      return (/\S$/.test(m)) ? parseInside (m, '<strong><em>', '</em></strong>') : wm;
-  	    });
-  	    text = text.replace(/\*\*(\S[\s\S]*?)\*\*/g, function (wm, m) {
-  	      return (/\S$/.test(m)) ? parseInside (m, '<strong>', '</strong>') : wm;
-  	    });
-  	    text = text.replace(/\*([^\s*][\s\S]*?)\*/g, function (wm, m) {
-  	      // !/^\*[^*]/.test(m) - test if it doesn't start with ** (since it seems redundant, we removed it)
-  	      return (/\S$/.test(m)) ? parseInside (m, '<em>', '</em>') : wm;
-  	    });
-  	  }
-
-
-  	  text = globals.converter._dispatch('italicsAndBold.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Form HTML ordered (numbered) and unordered (bulleted) lists.
-  	 */
-  	showdown.subParser('lists', function (text, options, globals) {
-
-  	  /**
-  	   * Process the contents of a single ordered or unordered list, splitting it
-  	   * into individual list items.
-  	   * @param {string} listStr
-  	   * @param {boolean} trimTrailing
-  	   * @returns {string}
-  	   */
-  	  function processListItems (listStr, trimTrailing) {
-  	    // The $g_list_level global keeps track of when we're inside a list.
-  	    // Each time we enter a list, we increment it; when we leave a list,
-  	    // we decrement. If it's zero, we're not in a list anymore.
-  	    //
-  	    // We do this because when we're not inside a list, we want to treat
-  	    // something like this:
-  	    //
-  	    //    I recommend upgrading to version
-  	    //    8. Oops, now this line is treated
-  	    //    as a sub-list.
-  	    //
-  	    // As a single paragraph, despite the fact that the second line starts
-  	    // with a digit-period-space sequence.
-  	    //
-  	    // Whereas when we're inside a list (or sub-list), that line will be
-  	    // treated as the start of a sub-list. What a kludge, huh? This is
-  	    // an aspect of Markdown's syntax that's hard to parse perfectly
-  	    // without resorting to mind-reading. Perhaps the solution is to
-  	    // change the syntax rules such that sub-lists must start with a
-  	    // starting cardinal number; e.g. "1." or "a.".
-  	    globals.gListLevel++;
-
-  	    // trim trailing blank lines:
-  	    listStr = listStr.replace(/\n{2,}$/, '\n');
-
-  	    // attacklab: add sentinel to emulate \z
-  	    listStr += '¨0';
-
-  	    var rgx = /(\n)?(^ {0,3})([*+-]|\d+[.])[ \t]+((\[(x|X| )?])?[ \t]*[^\r]+?(\n{1,2}))(?=\n*(¨0| {0,3}([*+-]|\d+[.])[ \t]+))/gm,
-  	        isParagraphed = (/\n[ \t]*\n(?!¨0)/.test(listStr));
-
-  	    // Since version 1.5, nesting sublists requires 4 spaces (or 1 tab) indentation,
-  	    // which is a syntax breaking change
-  	    // activating this option reverts to old behavior
-  	    if (options.disableForced4SpacesIndentedSublists) {
-  	      rgx = /(\n)?(^ {0,3})([*+-]|\d+[.])[ \t]+((\[(x|X| )?])?[ \t]*[^\r]+?(\n{1,2}))(?=\n*(¨0|\2([*+-]|\d+[.])[ \t]+))/gm;
-  	    }
-
-  	    listStr = listStr.replace(rgx, function (wholeMatch, m1, m2, m3, m4, taskbtn, checked) {
-  	      checked = (checked && checked.trim() !== '');
-
-  	      var item = showdown.subParser('outdent')(m4, options, globals),
-  	          bulletStyle = '';
-
-  	      // Support for github tasklists
-  	      if (taskbtn && options.tasklists) {
-  	        bulletStyle = ' class="task-list-item" style="list-style-type: none;"';
-  	        item = item.replace(/^[ \t]*\[(x|X| )?]/m, function () {
-  	          var otp = '<input type="checkbox" disabled style="margin: 0px 0.35em 0.25em -1.6em; vertical-align: middle;"';
-  	          if (checked) {
-  	            otp += ' checked';
-  	          }
-  	          otp += '>';
-  	          return otp;
-  	        });
-  	      }
-
-  	      // ISSUE #312
-  	      // This input: - - - a
-  	      // causes trouble to the parser, since it interprets it as:
-  	      // <ul><li><li><li>a</li></li></li></ul>
-  	      // instead of:
-  	      // <ul><li>- - a</li></ul>
-  	      // So, to prevent it, we will put a marker (¨A)in the beginning of the line
-  	      // Kind of hackish/monkey patching, but seems more effective than overcomplicating the list parser
-  	      item = item.replace(/^([-*+]|\d\.)[ \t]+[\S\n ]*/g, function (wm2) {
-  	        return '¨A' + wm2;
-  	      });
-
-  	      // m1 - Leading line or
-  	      // Has a double return (multi paragraph) or
-  	      // Has sublist
-  	      if (m1 || (item.search(/\n{2,}/) > -1)) {
-  	        item = showdown.subParser('githubCodeBlocks')(item, options, globals);
-  	        item = showdown.subParser('blockGamut')(item, options, globals);
-  	      } else {
-  	        // Recursion for sub-lists:
-  	        item = showdown.subParser('lists')(item, options, globals);
-  	        item = item.replace(/\n$/, ''); // chomp(item)
-  	        item = showdown.subParser('hashHTMLBlocks')(item, options, globals);
-
-  	        // Colapse double linebreaks
-  	        item = item.replace(/\n\n+/g, '\n\n');
-  	        if (isParagraphed) {
-  	          item = showdown.subParser('paragraphs')(item, options, globals);
-  	        } else {
-  	          item = showdown.subParser('spanGamut')(item, options, globals);
-  	        }
-  	      }
-
-  	      // now we need to remove the marker (¨A)
-  	      item = item.replace('¨A', '');
-  	      // we can finally wrap the line in list item tags
-  	      item =  '<li' + bulletStyle + '>' + item + '</li>\n';
-
-  	      return item;
-  	    });
-
-  	    // attacklab: strip sentinel
-  	    listStr = listStr.replace(/¨0/g, '');
-
-  	    globals.gListLevel--;
-
-  	    if (trimTrailing) {
-  	      listStr = listStr.replace(/\s+$/, '');
-  	    }
-
-  	    return listStr;
-  	  }
-
-  	  function styleStartNumber (list, listType) {
-  	    // check if ol and starts by a number different than 1
-  	    if (listType === 'ol') {
-  	      var res = list.match(/^ *(\d+)\./);
-  	      if (res && res[1] !== '1') {
-  	        return ' start="' + res[1] + '"';
-  	      }
-  	    }
-  	    return '';
-  	  }
-
-  	  /**
-  	   * Check and parse consecutive lists (better fix for issue #142)
-  	   * @param {string} list
-  	   * @param {string} listType
-  	   * @param {boolean} trimTrailing
-  	   * @returns {string}
-  	   */
-  	  function parseConsecutiveLists (list, listType, trimTrailing) {
-  	    // check if we caught 2 or more consecutive lists by mistake
-  	    // we use the counterRgx, meaning if listType is UL we look for OL and vice versa
-  	    var olRgx = (options.disableForced4SpacesIndentedSublists) ? /^ ?\d+\.[ \t]/gm : /^ {0,3}\d+\.[ \t]/gm,
-  	        ulRgx = (options.disableForced4SpacesIndentedSublists) ? /^ ?[*+-][ \t]/gm : /^ {0,3}[*+-][ \t]/gm,
-  	        counterRxg = (listType === 'ul') ? olRgx : ulRgx,
-  	        result = '';
-
-  	    if (list.search(counterRxg) !== -1) {
-  	      (function parseCL (txt) {
-  	        var pos = txt.search(counterRxg),
-  	            style = styleStartNumber(list, listType);
-  	        if (pos !== -1) {
-  	          // slice
-  	          result += '\n\n<' + listType + style + '>\n' + processListItems(txt.slice(0, pos), !!trimTrailing) + '</' + listType + '>\n';
-
-  	          // invert counterType and listType
-  	          listType = (listType === 'ul') ? 'ol' : 'ul';
-  	          counterRxg = (listType === 'ul') ? olRgx : ulRgx;
-
-  	          //recurse
-  	          parseCL(txt.slice(pos));
-  	        } else {
-  	          result += '\n\n<' + listType + style + '>\n' + processListItems(txt, !!trimTrailing) + '</' + listType + '>\n';
-  	        }
-  	      })(list);
-  	    } else {
-  	      var style = styleStartNumber(list, listType);
-  	      result = '\n\n<' + listType + style + '>\n' + processListItems(list, !!trimTrailing) + '</' + listType + '>\n';
-  	    }
-
-  	    return result;
-  	  }
-
-  	  /** Start of list parsing **/
-  	  text = globals.converter._dispatch('lists.before', text, options, globals);
-  	  // add sentinel to hack around khtml/safari bug:
-  	  // http://bugs.webkit.org/show_bug.cgi?id=11231
-  	  text += '¨0';
-
-  	  if (globals.gListLevel) {
-  	    text = text.replace(/^(( {0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(¨0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm,
-  	      function (wholeMatch, list, m2) {
-  	        var listType = (m2.search(/[*+-]/g) > -1) ? 'ul' : 'ol';
-  	        return parseConsecutiveLists(list, listType, true);
-  	      }
-  	    );
-  	  } else {
-  	    text = text.replace(/(\n\n|^\n?)(( {0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(¨0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm,
-  	      function (wholeMatch, m1, list, m3) {
-  	        var listType = (m3.search(/[*+-]/g) > -1) ? 'ul' : 'ol';
-  	        return parseConsecutiveLists(list, listType, false);
-  	      }
-  	    );
-  	  }
-
-  	  // strip sentinel
-  	  text = text.replace(/¨0/, '');
-  	  text = globals.converter._dispatch('lists.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Parse metadata at the top of the document
-  	 */
-  	showdown.subParser('metadata', function (text, options, globals) {
-
-  	  if (!options.metadata) {
-  	    return text;
-  	  }
-
-  	  text = globals.converter._dispatch('metadata.before', text, options, globals);
-
-  	  function parseMetadataContents (content) {
-  	    // raw is raw so it's not changed in any way
-  	    globals.metadata.raw = content;
-
-  	    // escape chars forbidden in html attributes
-  	    // double quotes
-  	    content = content
-  	      // ampersand first
-  	      .replace(/&/g, '&amp;')
-  	      // double quotes
-  	      .replace(/"/g, '&quot;');
-
-  	    content = content.replace(/\n {4}/g, ' ');
-  	    content.replace(/^([\S ]+): +([\s\S]+?)$/gm, function (wm, key, value) {
-  	      globals.metadata.parsed[key] = value;
-  	      return '';
-  	    });
-  	  }
-
-  	  text = text.replace(/^\s*«««+(\S*?)\n([\s\S]+?)\n»»»+\n/, function (wholematch, format, content) {
-  	    parseMetadataContents(content);
-  	    return '¨M';
-  	  });
-
-  	  text = text.replace(/^\s*---+(\S*?)\n([\s\S]+?)\n---+\n/, function (wholematch, format, content) {
-  	    if (format) {
-  	      globals.metadata.format = format;
-  	    }
-  	    parseMetadataContents(content);
-  	    return '¨M';
-  	  });
-
-  	  text = text.replace(/¨M/g, '');
-
-  	  text = globals.converter._dispatch('metadata.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 * Remove one level of line-leading tabs or spaces
-  	 */
-  	showdown.subParser('outdent', function (text, options, globals) {
-  	  text = globals.converter._dispatch('outdent.before', text, options, globals);
-
-  	  // attacklab: hack around Konqueror 3.5.4 bug:
-  	  // "----------bug".replace(/^-/g,"") == "bug"
-  	  text = text.replace(/^(\t|[ ]{1,4})/gm, '¨0'); // attacklab: g_tab_width
-
-  	  // attacklab: clean up hack
-  	  text = text.replace(/¨0/g, '');
-
-  	  text = globals.converter._dispatch('outdent.after', text, options, globals);
-  	  return text;
-  	});
-
-  	/**
-  	 *
-  	 */
-  	showdown.subParser('paragraphs', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('paragraphs.before', text, options, globals);
-  	  // Strip leading and trailing lines:
-  	  text = text.replace(/^\n+/g, '');
-  	  text = text.replace(/\n+$/g, '');
-
-  	  var grafs = text.split(/\n{2,}/g),
-  	      grafsOut = [],
-  	      end = grafs.length; // Wrap <p> tags
-
-  	  for (var i = 0; i < end; i++) {
-  	    var str = grafs[i];
-  	    // if this is an HTML marker, copy it
-  	    if (str.search(/¨(K|G)(\d+)\1/g) >= 0) {
-  	      grafsOut.push(str);
-
-  	    // test for presence of characters to prevent empty lines being parsed
-  	    // as paragraphs (resulting in undesired extra empty paragraphs)
-  	    } else if (str.search(/\S/) >= 0) {
-  	      str = showdown.subParser('spanGamut')(str, options, globals);
-  	      str = str.replace(/^([ \t]*)/g, '<p>');
-  	      str += '</p>';
-  	      grafsOut.push(str);
-  	    }
-  	  }
-
-  	  /** Unhashify HTML blocks */
-  	  end = grafsOut.length;
-  	  for (i = 0; i < end; i++) {
-  	    var blockText = '',
-  	        grafsOutIt = grafsOut[i],
-  	        codeFlag = false;
-  	    // if this is a marker for an html block...
-  	    // use RegExp.test instead of string.search because of QML bug
-  	    while (/¨(K|G)(\d+)\1/.test(grafsOutIt)) {
-  	      var delim = RegExp.$1,
-  	          num   = RegExp.$2;
-
-  	      if (delim === 'K') {
-  	        blockText = globals.gHtmlBlocks[num];
-  	      } else {
-  	        // we need to check if ghBlock is a false positive
-  	        if (codeFlag) {
-  	          // use encoded version of all text
-  	          blockText = showdown.subParser('encodeCode')(globals.ghCodeBlocks[num].text, options, globals);
-  	        } else {
-  	          blockText = globals.ghCodeBlocks[num].codeblock;
-  	        }
-  	      }
-  	      blockText = blockText.replace(/\$/g, '$$$$'); // Escape any dollar signs
-
-  	      grafsOutIt = grafsOutIt.replace(/(\n\n)?¨(K|G)\d+\2(\n\n)?/, blockText);
-  	      // Check if grafsOutIt is a pre->code
-  	      if (/^<pre\b[^>]*>\s*<code\b[^>]*>/.test(grafsOutIt)) {
-  	        codeFlag = true;
-  	      }
-  	    }
-  	    grafsOut[i] = grafsOutIt;
-  	  }
-  	  text = grafsOut.join('\n');
-  	  // Strip leading and trailing lines:
-  	  text = text.replace(/^\n+/g, '');
-  	  text = text.replace(/\n+$/g, '');
-  	  return globals.converter._dispatch('paragraphs.after', text, options, globals);
-  	});
-
-  	/**
-  	 * Run extension
-  	 */
-  	showdown.subParser('runExtension', function (ext, text, options, globals) {
-
-  	  if (ext.filter) {
-  	    text = ext.filter(text, globals.converter, options);
-
-  	  } else if (ext.regex) {
-  	    // TODO remove this when old extension loading mechanism is deprecated
-  	    var re = ext.regex;
-  	    if (!(re instanceof RegExp)) {
-  	      re = new RegExp(re, 'g');
-  	    }
-  	    text = text.replace(re, ext.replace);
-  	  }
-
-  	  return text;
-  	});
-
-  	/**
-  	 * These are all the transformations that occur *within* block-level
-  	 * tags like paragraphs, headers, and list items.
-  	 */
-  	showdown.subParser('spanGamut', function (text, options, globals) {
-
-  	  text = globals.converter._dispatch('spanGamut.before', text, options, globals);
-  	  text = showdown.subParser('codeSpans')(text, options, globals);
-  	  text = showdown.subParser('escapeSpecialCharsWithinTagAttributes')(text, options, globals);
-  	  text = showdown.subParser('encodeBackslashEscapes')(text, options, globals);
-
-  	  // Process anchor and image tags. Images must come first,
-  	  // because ![foo][f] looks like an anchor.
-  	  text = showdown.subParser('images')(text, options, globals);
-  	  text = showdown.subParser('anchors')(text, options, globals);
-
-  	  // Make links out of things like `<http://example.com/>`
-  	  // Must come after anchors, because you can use < and >
-  	  // delimiters in inline links like [this](<url>).
-  	  text = showdown.subParser('autoLinks')(text, options, globals);
-  	  text = showdown.subParser('simplifiedAutoLinks')(text, options, globals);
-  	  text = showdown.subParser('emoji')(text, options, globals);
-  	  text = showdown.subParser('underline')(text, options, globals);
-  	  text = showdown.subParser('italicsAndBold')(text, options, globals);
-  	  text = showdown.subParser('strikethrough')(text, options, globals);
-  	  text = showdown.subParser('ellipsis')(text, options, globals);
-
-  	  // we need to hash HTML tags inside spans
-  	  text = showdown.subParser('hashHTMLSpans')(text, options, globals);
-
-  	  // now we encode amps and angles
-  	  text = showdown.subParser('encodeAmpsAndAngles')(text, options, globals);
-
-  	  // Do hard breaks
-  	  if (options.simpleLineBreaks) {
-  	    // GFM style hard breaks
-  	    // only add line breaks if the text does not contain a block (special case for lists)
-  	    if (!/\n\n¨K/.test(text)) {
-  	      text = text.replace(/\n+/g, '<br />\n');
-  	    }
-  	  } else {
-  	    // Vanilla hard breaks
-  	    text = text.replace(/  +\n/g, '<br />\n');
-  	  }
-
-  	  text = globals.converter._dispatch('spanGamut.after', text, options, globals);
-  	  return text;
-  	});
-
-  	showdown.subParser('strikethrough', function (text, options, globals) {
-
-  	  function parseInside (txt) {
-  	    if (options.simplifiedAutoLink) {
-  	      txt = showdown.subParser('simplifiedAutoLinks')(txt, options, globals);
-  	    }
-  	    return '<del>' + txt + '</del>';
-  	  }
-
-  	  if (options.strikethrough) {
-  	    text = globals.converter._dispatch('strikethrough.before', text, options, globals);
-  	    text = text.replace(/(?:~){2}([\s\S]+?)(?:~){2}/g, function (wm, txt) { return parseInside(txt); });
-  	    text = globals.converter._dispatch('strikethrough.after', text, options, globals);
-  	  }
-
-  	  return text;
-  	});
-
-  	/**
-  	 * Strips link definitions from text, stores the URLs and titles in
-  	 * hash references.
-  	 * Link defs are in the form: ^[id]: url "optional title"
-  	 */
-  	showdown.subParser('stripLinkDefinitions', function (text, options, globals) {
-
-  	  var regex       = /^ {0,3}\[([^\]]+)]:[ \t]*\n?[ \t]*<?([^>\s]+)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*\n?[ \t]*(?:(\n*)["|'(](.+?)["|')][ \t]*)?(?:\n+|(?=¨0))/gm,
-  	      base64Regex = /^ {0,3}\[([^\]]+)]:[ \t]*\n?[ \t]*<?(data:.+?\/.+?;base64,[A-Za-z0-9+/=\n]+?)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*\n?[ \t]*(?:(\n*)["|'(](.+?)["|')][ \t]*)?(?:\n\n|(?=¨0)|(?=\n\[))/gm;
-
-  	  // attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
-  	  text += '¨0';
-
-  	  var replaceFunc = function (wholeMatch, linkId, url, width, height, blankLines, title) {
-
-  	    // if there aren't two instances of linkId it must not be a reference link so back out
-  	    linkId = linkId.toLowerCase();
-  	    if (text.toLowerCase().split(linkId).length - 1 < 2) {
-  	      return wholeMatch;
-  	    }
-  	    if (url.match(/^data:.+?\/.+?;base64,/)) {
-  	      // remove newlines
-  	      globals.gUrls[linkId] = url.replace(/\s/g, '');
-  	    } else {
-  	      globals.gUrls[linkId] = showdown.subParser('encodeAmpsAndAngles')(url, options, globals);  // Link IDs are case-insensitive
-  	    }
-
-  	    if (blankLines) {
-  	      // Oops, found blank lines, so it's not a title.
-  	      // Put back the parenthetical statement we stole.
-  	      return blankLines + title;
-
-  	    } else {
-  	      if (title) {
-  	        globals.gTitles[linkId] = title.replace(/"|'/g, '&quot;');
-  	      }
-  	      if (options.parseImgDimensions && width && height) {
-  	        globals.gDimensions[linkId] = {
-  	          width:  width,
-  	          height: height
-  	        };
-  	      }
-  	    }
-  	    // Completely remove the definition from the text
-  	    return '';
-  	  };
-
-  	  // first we try to find base64 link references
-  	  text = text.replace(base64Regex, replaceFunc);
-
-  	  text = text.replace(regex, replaceFunc);
-
-  	  // attacklab: strip sentinel
-  	  text = text.replace(/¨0/, '');
-
-  	  return text;
-  	});
-
-  	showdown.subParser('tables', function (text, options, globals) {
-
-  	  if (!options.tables) {
-  	    return text;
-  	  }
-
-  	  var tableRgx       = /^ {0,3}\|?.+\|.+\n {0,3}\|?[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*:?[ \t]*(?:[-=]){2,}[\s\S]+?(?:\n\n|¨0)/gm,
-  	      //singeColTblRgx = /^ {0,3}\|.+\|\n {0,3}\|[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*\n(?: {0,3}\|.+\|\n)+(?:\n\n|¨0)/gm;
-  	      singeColTblRgx = /^ {0,3}\|.+\|[ \t]*\n {0,3}\|[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*\n( {0,3}\|.+\|[ \t]*\n)*(?:\n|¨0)/gm;
-
-  	  function parseStyles (sLine) {
-  	    if (/^:[ \t]*--*$/.test(sLine)) {
-  	      return ' style="text-align:left;"';
-  	    } else if (/^--*[ \t]*:[ \t]*$/.test(sLine)) {
-  	      return ' style="text-align:right;"';
-  	    } else if (/^:[ \t]*--*[ \t]*:$/.test(sLine)) {
-  	      return ' style="text-align:center;"';
-  	    } else {
-  	      return '';
-  	    }
-  	  }
-
-  	  function parseHeaders (header, style) {
-  	    var id = '';
-  	    header = header.trim();
-  	    // support both tablesHeaderId and tableHeaderId due to error in documentation so we don't break backwards compatibility
-  	    if (options.tablesHeaderId || options.tableHeaderId) {
-  	      id = ' id="' + header.replace(/ /g, '_').toLowerCase() + '"';
-  	    }
-  	    header = showdown.subParser('spanGamut')(header, options, globals);
-
-  	    return '<th' + id + style + '>' + header + '</th>\n';
-  	  }
-
-  	  function parseCells (cell, style) {
-  	    var subText = showdown.subParser('spanGamut')(cell, options, globals);
-  	    return '<td' + style + '>' + subText + '</td>\n';
-  	  }
-
-  	  function buildTable (headers, cells) {
-  	    var tb = '<table>\n<thead>\n<tr>\n',
-  	        tblLgn = headers.length;
-
-  	    for (var i = 0; i < tblLgn; ++i) {
-  	      tb += headers[i];
-  	    }
-  	    tb += '</tr>\n</thead>\n<tbody>\n';
-
-  	    for (i = 0; i < cells.length; ++i) {
-  	      tb += '<tr>\n';
-  	      for (var ii = 0; ii < tblLgn; ++ii) {
-  	        tb += cells[i][ii];
-  	      }
-  	      tb += '</tr>\n';
-  	    }
-  	    tb += '</tbody>\n</table>\n';
-  	    return tb;
-  	  }
-
-  	  function parseTable (rawTable) {
-  	    var i, tableLines = rawTable.split('\n');
-
-  	    for (i = 0; i < tableLines.length; ++i) {
-  	      // strip wrong first and last column if wrapped tables are used
-  	      if (/^ {0,3}\|/.test(tableLines[i])) {
-  	        tableLines[i] = tableLines[i].replace(/^ {0,3}\|/, '');
-  	      }
-  	      if (/\|[ \t]*$/.test(tableLines[i])) {
-  	        tableLines[i] = tableLines[i].replace(/\|[ \t]*$/, '');
-  	      }
-  	      // parse code spans first, but we only support one line code spans
-  	      tableLines[i] = showdown.subParser('codeSpans')(tableLines[i], options, globals);
-  	    }
-
-  	    var rawHeaders = tableLines[0].split('|').map(function (s) { return s.trim();}),
-  	        rawStyles = tableLines[1].split('|').map(function (s) { return s.trim();}),
-  	        rawCells = [],
-  	        headers = [],
-  	        styles = [],
-  	        cells = [];
-
-  	    tableLines.shift();
-  	    tableLines.shift();
-
-  	    for (i = 0; i < tableLines.length; ++i) {
-  	      if (tableLines[i].trim() === '') {
-  	        continue;
-  	      }
-  	      rawCells.push(
-  	        tableLines[i]
-  	          .split('|')
-  	          .map(function (s) {
-  	            return s.trim();
-  	          })
-  	      );
-  	    }
-
-  	    if (rawHeaders.length < rawStyles.length) {
-  	      return rawTable;
-  	    }
-
-  	    for (i = 0; i < rawStyles.length; ++i) {
-  	      styles.push(parseStyles(rawStyles[i]));
-  	    }
-
-  	    for (i = 0; i < rawHeaders.length; ++i) {
-  	      if (showdown.helper.isUndefined(styles[i])) {
-  	        styles[i] = '';
-  	      }
-  	      headers.push(parseHeaders(rawHeaders[i], styles[i]));
-  	    }
-
-  	    for (i = 0; i < rawCells.length; ++i) {
-  	      var row = [];
-  	      for (var ii = 0; ii < headers.length; ++ii) {
-  	        if (showdown.helper.isUndefined(rawCells[i][ii])) ;
-  	        row.push(parseCells(rawCells[i][ii], styles[ii]));
-  	      }
-  	      cells.push(row);
-  	    }
-
-  	    return buildTable(headers, cells);
-  	  }
-
-  	  text = globals.converter._dispatch('tables.before', text, options, globals);
-
-  	  // find escaped pipe characters
-  	  text = text.replace(/\\(\|)/g, showdown.helper.escapeCharactersCallback);
-
-  	  // parse multi column tables
-  	  text = text.replace(tableRgx, parseTable);
-
-  	  // parse one column tables
-  	  text = text.replace(singeColTblRgx, parseTable);
-
-  	  text = globals.converter._dispatch('tables.after', text, options, globals);
-
-  	  return text;
-  	});
-
-  	showdown.subParser('underline', function (text, options, globals) {
-
-  	  if (!options.underline) {
-  	    return text;
-  	  }
-
-  	  text = globals.converter._dispatch('underline.before', text, options, globals);
-
-  	  if (options.literalMidWordUnderscores) {
-  	    text = text.replace(/\b___(\S[\s\S]*?)___\b/g, function (wm, txt) {
-  	      return '<u>' + txt + '</u>';
-  	    });
-  	    text = text.replace(/\b__(\S[\s\S]*?)__\b/g, function (wm, txt) {
-  	      return '<u>' + txt + '</u>';
-  	    });
-  	  } else {
-  	    text = text.replace(/___(\S[\s\S]*?)___/g, function (wm, m) {
-  	      return (/\S$/.test(m)) ? '<u>' + m + '</u>' : wm;
-  	    });
-  	    text = text.replace(/__(\S[\s\S]*?)__/g, function (wm, m) {
-  	      return (/\S$/.test(m)) ? '<u>' + m + '</u>' : wm;
-  	    });
-  	  }
-
-  	  // escape remaining underscores to prevent them being parsed by italic and bold
-  	  text = text.replace(/(_)/g, showdown.helper.escapeCharactersCallback);
-
-  	  text = globals.converter._dispatch('underline.after', text, options, globals);
-
-  	  return text;
-  	});
-
-  	/**
-  	 * Swap back in all the special characters we've hidden.
-  	 */
-  	showdown.subParser('unescapeSpecialChars', function (text, options, globals) {
-  	  text = globals.converter._dispatch('unescapeSpecialChars.before', text, options, globals);
-
-  	  text = text.replace(/¨E(\d+)E/g, function (wholeMatch, m1) {
-  	    var charCodeToReplace = parseInt(m1);
-  	    return String.fromCharCode(charCodeToReplace);
-  	  });
-
-  	  text = globals.converter._dispatch('unescapeSpecialChars.after', text, options, globals);
-  	  return text;
-  	});
-
-  	showdown.subParser('makeMarkdown.blockquote', function (node, globals) {
-
-  	  var txt = '';
-  	  if (node.hasChildNodes()) {
-  	    var children = node.childNodes,
-  	        childrenLength = children.length;
-
-  	    for (var i = 0; i < childrenLength; ++i) {
-  	      var innerTxt = showdown.subParser('makeMarkdown.node')(children[i], globals);
-
-  	      if (innerTxt === '') {
-  	        continue;
-  	      }
-  	      txt += innerTxt;
-  	    }
-  	  }
-  	  // cleanup
-  	  txt = txt.trim();
-  	  txt = '> ' + txt.split('\n').join('\n> ');
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.codeBlock', function (node, globals) {
-
-  	  var lang = node.getAttribute('language'),
-  	      num  = node.getAttribute('precodenum');
-  	  return '```' + lang + '\n' + globals.preList[num] + '\n```';
-  	});
-
-  	showdown.subParser('makeMarkdown.codeSpan', function (node) {
-
-  	  return '`' + node.innerHTML + '`';
-  	});
-
-  	showdown.subParser('makeMarkdown.emphasis', function (node, globals) {
-
-  	  var txt = '';
-  	  if (node.hasChildNodes()) {
-  	    txt += '*';
-  	    var children = node.childNodes,
-  	        childrenLength = children.length;
-  	    for (var i = 0; i < childrenLength; ++i) {
-  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
-  	    }
-  	    txt += '*';
-  	  }
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.header', function (node, globals, headerLevel) {
-
-  	  var headerMark = new Array(headerLevel + 1).join('#'),
-  	      txt = '';
-
-  	  if (node.hasChildNodes()) {
-  	    txt = headerMark + ' ';
-  	    var children = node.childNodes,
-  	        childrenLength = children.length;
-
-  	    for (var i = 0; i < childrenLength; ++i) {
-  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
-  	    }
-  	  }
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.hr', function () {
-
-  	  return '---';
-  	});
-
-  	showdown.subParser('makeMarkdown.image', function (node) {
-
-  	  var txt = '';
-  	  if (node.hasAttribute('src')) {
-  	    txt += '![' + node.getAttribute('alt') + '](';
-  	    txt += '<' + node.getAttribute('src') + '>';
-  	    if (node.hasAttribute('width') && node.hasAttribute('height')) {
-  	      txt += ' =' + node.getAttribute('width') + 'x' + node.getAttribute('height');
-  	    }
-
-  	    if (node.hasAttribute('title')) {
-  	      txt += ' "' + node.getAttribute('title') + '"';
-  	    }
-  	    txt += ')';
-  	  }
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.links', function (node, globals) {
-
-  	  var txt = '';
-  	  if (node.hasChildNodes() && node.hasAttribute('href')) {
-  	    var children = node.childNodes,
-  	        childrenLength = children.length;
-  	    txt = '[';
-  	    for (var i = 0; i < childrenLength; ++i) {
-  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
-  	    }
-  	    txt += '](';
-  	    txt += '<' + node.getAttribute('href') + '>';
-  	    if (node.hasAttribute('title')) {
-  	      txt += ' "' + node.getAttribute('title') + '"';
-  	    }
-  	    txt += ')';
-  	  }
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.list', function (node, globals, type) {
-
-  	  var txt = '';
-  	  if (!node.hasChildNodes()) {
-  	    return '';
-  	  }
-  	  var listItems       = node.childNodes,
-  	      listItemsLenght = listItems.length,
-  	      listNum = node.getAttribute('start') || 1;
-
-  	  for (var i = 0; i < listItemsLenght; ++i) {
-  	    if (typeof listItems[i].tagName === 'undefined' || listItems[i].tagName.toLowerCase() !== 'li') {
-  	      continue;
-  	    }
-
-  	    // define the bullet to use in list
-  	    var bullet = '';
-  	    if (type === 'ol') {
-  	      bullet = listNum.toString() + '. ';
-  	    } else {
-  	      bullet = '- ';
-  	    }
-
-  	    // parse list item
-  	    txt += bullet + showdown.subParser('makeMarkdown.listItem')(listItems[i], globals);
-  	    ++listNum;
-  	  }
-
-  	  // add comment at the end to prevent consecutive lists to be parsed as one
-  	  txt += '\n<!-- -->\n';
-  	  return txt.trim();
-  	});
-
-  	showdown.subParser('makeMarkdown.listItem', function (node, globals) {
-
-  	  var listItemTxt = '';
-
-  	  var children = node.childNodes,
-  	      childrenLenght = children.length;
-
-  	  for (var i = 0; i < childrenLenght; ++i) {
-  	    listItemTxt += showdown.subParser('makeMarkdown.node')(children[i], globals);
-  	  }
-  	  // if it's only one liner, we need to add a newline at the end
-  	  if (!/\n$/.test(listItemTxt)) {
-  	    listItemTxt += '\n';
-  	  } else {
-  	    // it's multiparagraph, so we need to indent
-  	    listItemTxt = listItemTxt
-  	      .split('\n')
-  	      .join('\n    ')
-  	      .replace(/^ {4}$/gm, '')
-  	      .replace(/\n\n+/g, '\n\n');
-  	  }
-
-  	  return listItemTxt;
-  	});
-
-
-
-  	showdown.subParser('makeMarkdown.node', function (node, globals, spansOnly) {
-
-  	  spansOnly = spansOnly || false;
-
-  	  var txt = '';
-
-  	  // edge case of text without wrapper paragraph
-  	  if (node.nodeType === 3) {
-  	    return showdown.subParser('makeMarkdown.txt')(node, globals);
-  	  }
-
-  	  // HTML comment
-  	  if (node.nodeType === 8) {
-  	    return '<!--' + node.data + '-->\n\n';
-  	  }
-
-  	  // process only node elements
-  	  if (node.nodeType !== 1) {
-  	    return '';
-  	  }
-
-  	  var tagName = node.tagName.toLowerCase();
-
-  	  switch (tagName) {
-
-  	    //
-  	    // BLOCKS
-  	    //
-  	    case 'h1':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 1) + '\n\n'; }
-  	      break;
-  	    case 'h2':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 2) + '\n\n'; }
-  	      break;
-  	    case 'h3':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 3) + '\n\n'; }
-  	      break;
-  	    case 'h4':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 4) + '\n\n'; }
-  	      break;
-  	    case 'h5':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 5) + '\n\n'; }
-  	      break;
-  	    case 'h6':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 6) + '\n\n'; }
-  	      break;
-
-  	    case 'p':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.paragraph')(node, globals) + '\n\n'; }
-  	      break;
-
-  	    case 'blockquote':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.blockquote')(node, globals) + '\n\n'; }
-  	      break;
-
-  	    case 'hr':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.hr')(node, globals) + '\n\n'; }
-  	      break;
-
-  	    case 'ol':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.list')(node, globals, 'ol') + '\n\n'; }
-  	      break;
-
-  	    case 'ul':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.list')(node, globals, 'ul') + '\n\n'; }
-  	      break;
-
-  	    case 'precode':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.codeBlock')(node, globals) + '\n\n'; }
-  	      break;
-
-  	    case 'pre':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.pre')(node, globals) + '\n\n'; }
-  	      break;
-
-  	    case 'table':
-  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.table')(node, globals) + '\n\n'; }
-  	      break;
-
-  	    //
-  	    // SPANS
-  	    //
-  	    case 'code':
-  	      txt = showdown.subParser('makeMarkdown.codeSpan')(node, globals);
-  	      break;
-
-  	    case 'em':
-  	    case 'i':
-  	      txt = showdown.subParser('makeMarkdown.emphasis')(node, globals);
-  	      break;
-
-  	    case 'strong':
-  	    case 'b':
-  	      txt = showdown.subParser('makeMarkdown.strong')(node, globals);
-  	      break;
-
-  	    case 'del':
-  	      txt = showdown.subParser('makeMarkdown.strikethrough')(node, globals);
-  	      break;
-
-  	    case 'a':
-  	      txt = showdown.subParser('makeMarkdown.links')(node, globals);
-  	      break;
-
-  	    case 'img':
-  	      txt = showdown.subParser('makeMarkdown.image')(node, globals);
-  	      break;
-
-  	    default:
-  	      txt = node.outerHTML + '\n\n';
-  	  }
-
-  	  // common normalization
-  	  // TODO eventually
-
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.paragraph', function (node, globals) {
-
-  	  var txt = '';
-  	  if (node.hasChildNodes()) {
-  	    var children = node.childNodes,
-  	        childrenLength = children.length;
-  	    for (var i = 0; i < childrenLength; ++i) {
-  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
-  	    }
-  	  }
-
-  	  // some text normalization
-  	  txt = txt.trim();
-
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.pre', function (node, globals) {
-
-  	  var num  = node.getAttribute('prenum');
-  	  return '<pre>' + globals.preList[num] + '</pre>';
-  	});
-
-  	showdown.subParser('makeMarkdown.strikethrough', function (node, globals) {
-
-  	  var txt = '';
-  	  if (node.hasChildNodes()) {
-  	    txt += '~~';
-  	    var children = node.childNodes,
-  	        childrenLength = children.length;
-  	    for (var i = 0; i < childrenLength; ++i) {
-  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
-  	    }
-  	    txt += '~~';
-  	  }
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.strong', function (node, globals) {
-
-  	  var txt = '';
-  	  if (node.hasChildNodes()) {
-  	    txt += '**';
-  	    var children = node.childNodes,
-  	        childrenLength = children.length;
-  	    for (var i = 0; i < childrenLength; ++i) {
-  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
-  	    }
-  	    txt += '**';
-  	  }
-  	  return txt;
-  	});
-
-  	showdown.subParser('makeMarkdown.table', function (node, globals) {
-
-  	  var txt = '',
-  	      tableArray = [[], []],
-  	      headings   = node.querySelectorAll('thead>tr>th'),
-  	      rows       = node.querySelectorAll('tbody>tr'),
-  	      i, ii;
-  	  for (i = 0; i < headings.length; ++i) {
-  	    var headContent = showdown.subParser('makeMarkdown.tableCell')(headings[i], globals),
-  	        allign = '---';
-
-  	    if (headings[i].hasAttribute('style')) {
-  	      var style = headings[i].getAttribute('style').toLowerCase().replace(/\s/g, '');
-  	      switch (style) {
-  	        case 'text-align:left;':
-  	          allign = ':---';
-  	          break;
-  	        case 'text-align:right;':
-  	          allign = '---:';
-  	          break;
-  	        case 'text-align:center;':
-  	          allign = ':---:';
-  	          break;
-  	      }
-  	    }
-  	    tableArray[0][i] = headContent.trim();
-  	    tableArray[1][i] = allign;
-  	  }
-
-  	  for (i = 0; i < rows.length; ++i) {
-  	    var r = tableArray.push([]) - 1,
-  	        cols = rows[i].getElementsByTagName('td');
-
-  	    for (ii = 0; ii < headings.length; ++ii) {
-  	      var cellContent = ' ';
-  	      if (typeof cols[ii] !== 'undefined') {
-  	        cellContent = showdown.subParser('makeMarkdown.tableCell')(cols[ii], globals);
-  	      }
-  	      tableArray[r].push(cellContent);
-  	    }
-  	  }
-
-  	  var cellSpacesCount = 3;
-  	  for (i = 0; i < tableArray.length; ++i) {
-  	    for (ii = 0; ii < tableArray[i].length; ++ii) {
-  	      var strLen = tableArray[i][ii].length;
-  	      if (strLen > cellSpacesCount) {
-  	        cellSpacesCount = strLen;
-  	      }
-  	    }
-  	  }
-
-  	  for (i = 0; i < tableArray.length; ++i) {
-  	    for (ii = 0; ii < tableArray[i].length; ++ii) {
-  	      if (i === 1) {
-  	        if (tableArray[i][ii].slice(-1) === ':') {
-  	          tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii].slice(-1), cellSpacesCount - 1, '-') + ':';
-  	        } else {
-  	          tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii], cellSpacesCount, '-');
-  	        }
-  	      } else {
-  	        tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii], cellSpacesCount);
-  	      }
-  	    }
-  	    txt += '| ' + tableArray[i].join(' | ') + ' |\n';
-  	  }
-
-  	  return txt.trim();
-  	});
-
-  	showdown.subParser('makeMarkdown.tableCell', function (node, globals) {
-
-  	  var txt = '';
-  	  if (!node.hasChildNodes()) {
-  	    return '';
-  	  }
-  	  var children = node.childNodes,
-  	      childrenLength = children.length;
-
-  	  for (var i = 0; i < childrenLength; ++i) {
-  	    txt += showdown.subParser('makeMarkdown.node')(children[i], globals, true);
-  	  }
-  	  return txt.trim();
-  	});
-
-  	showdown.subParser('makeMarkdown.txt', function (node) {
-
-  	  var txt = node.nodeValue;
-
-  	  // multiple spaces are collapsed
-  	  txt = txt.replace(/ +/g, ' ');
-
-  	  // replace the custom ¨NBSP; with a space
-  	  txt = txt.replace(/¨NBSP;/g, ' ');
-
-  	  // ", <, > and & should replace escaped html entities
-  	  txt = showdown.helper.unescapeHTMLEntities(txt);
-
-  	  // escape markdown magic characters
-  	  // emphasis, strong and strikethrough - can appear everywhere
-  	  // we also escape pipe (|) because of tables
-  	  // and escape ` because of code blocks and spans
-  	  txt = txt.replace(/([*_~|`])/g, '\\$1');
-
-  	  // escape > because of blockquotes
-  	  txt = txt.replace(/^(\s*)>/g, '\\$1>');
-
-  	  // hash character, only troublesome at the beginning of a line because of headers
-  	  txt = txt.replace(/^#/gm, '\\#');
-
-  	  // horizontal rules
-  	  txt = txt.replace(/^(\s*)([-=]{3,})(\s*)$/, '$1\\$2$3');
-
-  	  // dot, because of ordered lists, only troublesome at the beginning of a line when preceded by an integer
-  	  txt = txt.replace(/^( {0,3}\d+)\./gm, '$1\\.');
-
-  	  // +, * and -, at the beginning of a line becomes a list, so we need to escape them also (asterisk was already escaped)
-  	  txt = txt.replace(/^( {0,3})([+-])/gm, '$1\\$2');
-
-  	  // images and links, ] followed by ( is problematic, so we escape it
-  	  txt = txt.replace(/]([\s]*)\(/g, '\\]$1\\(');
-
-  	  // reference URIs must also be escaped
-  	  txt = txt.replace(/^ {0,3}\[([\S \t]*?)]:/gm, '\\[$1]:');
-
-  	  return txt;
-  	});
-
-  	var root = this;
-
-  	// AMD Loader
-  	if (module.exports) {
-  	  module.exports = showdown;
-
-  	// Regular Browser loader
-  	} else {
-  	  root.showdown = showdown;
-  	}
-  	}).call(commonjsGlobal);
-
-  	
-  } (showdown));
-
-  /*
-   *  big.js v6.2.1
-   *  A small, fast, easy-to-use library for arbitrary-precision decimal arithmetic.
-   *  Copyright (c) 2022 Michael Mclaughlin
-   *  https://github.com/MikeMcl/big.js/LICENCE.md
-   */
-
-
-  /************************************** EDITABLE DEFAULTS *****************************************/
-
-
-    // The default values below must be integers within the stated ranges.
-
-    /*
-     * The maximum number of decimal places (DP) of the results of operations involving division:
-     * div and sqrt, and pow with negative exponents.
-     */
-  var DP = 20,          // 0 to MAX_DP
-
-    /*
-     * The rounding mode (RM) used when rounding to the above decimal places.
-     *
-     *  0  Towards zero (i.e. truncate, no rounding).       (ROUND_DOWN)
-     *  1  To nearest neighbour. If equidistant, round up.  (ROUND_HALF_UP)
-     *  2  To nearest neighbour. If equidistant, to even.   (ROUND_HALF_EVEN)
-     *  3  Away from zero.                                  (ROUND_UP)
-     */
-    RM = 1,             // 0, 1, 2 or 3
-
-    // The maximum value of DP and Big.DP.
-    MAX_DP = 1E6,       // 0 to 1000000
-
-    // The maximum magnitude of the exponent argument to the pow method.
-    MAX_POWER = 1E6,    // 1 to 1000000
-
-    /*
-     * The negative exponent (NE) at and beneath which toString returns exponential notation.
-     * (JavaScript numbers: -7)
-     * -1000000 is the minimum recommended exponent value of a Big.
-     */
-    NE = -7,            // 0 to -1000000
-
-    /*
-     * The positive exponent (PE) at and above which toString returns exponential notation.
-     * (JavaScript numbers: 21)
-     * 1000000 is the maximum recommended exponent value of a Big, but this limit is not enforced.
-     */
-    PE = 21,            // 0 to 1000000
-
-    /*
-     * When true, an error will be thrown if a primitive number is passed to the Big constructor,
-     * or if valueOf is called, or if toNumber is called on a Big which cannot be converted to a
-     * primitive number without a loss of precision.
-     */
-    STRICT = false,     // true or false
-
-
-  /**************************************************************************************************/
-
-
-    // Error messages.
-    NAME = '[big.js] ',
-    INVALID = NAME + 'Invalid ',
-    INVALID_DP = INVALID + 'decimal places',
-    INVALID_RM = INVALID + 'rounding mode',
-    DIV_BY_ZERO = NAME + 'Division by zero',
-
-    // The shared prototype object.
-    P$2 = {},
-    UNDEFINED = void 0,
-    NUMERIC = /^-?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i;
-
-
-  /*
-   * Create and return a Big constructor.
-   */
-  function _Big_() {
-
-    /*
-     * The Big constructor and exported function.
-     * Create and return a new instance of a Big number object.
-     *
-     * n {number|string|Big} A numeric value.
-     */
-    function Big(n) {
-      var x = this;
-
-      // Enable constructor usage without new.
-      if (!(x instanceof Big)) return n === UNDEFINED ? _Big_() : new Big(n);
-
-      // Duplicate.
-      if (n instanceof Big) {
-        x.s = n.s;
-        x.e = n.e;
-        x.c = n.c.slice();
-      } else {
-        if (typeof n !== 'string') {
-          if (Big.strict === true && typeof n !== 'bigint') {
-            throw TypeError(INVALID + 'value');
-          }
-
-          // Minus zero?
-          n = n === 0 && 1 / n < 0 ? '-0' : String(n);
-        }
-
-        parse(x, n);
-      }
-
-      // Retain a reference to this Big constructor.
-      // Shadow Big.prototype.constructor which points to Object.
-      x.constructor = Big;
-    }
-
-    Big.prototype = P$2;
-    Big.DP = DP;
-    Big.RM = RM;
-    Big.NE = NE;
-    Big.PE = PE;
-    Big.strict = STRICT;
-    Big.roundDown = 0;
-    Big.roundHalfUp = 1;
-    Big.roundHalfEven = 2;
-    Big.roundUp = 3;
-
-    return Big;
-  }
-
-
-  /*
-   * Parse the number or string value passed to a Big constructor.
-   *
-   * x {Big} A Big number instance.
-   * n {number|string} A numeric value.
-   */
-  function parse(x, n) {
-    var e, i, nl;
-
-    if (!NUMERIC.test(n)) {
-      throw Error(INVALID + 'number');
-    }
-
-    // Determine sign.
-    x.s = n.charAt(0) == '-' ? (n = n.slice(1), -1) : 1;
-
-    // Decimal point?
-    if ((e = n.indexOf('.')) > -1) n = n.replace('.', '');
-
-    // Exponential form?
-    if ((i = n.search(/e/i)) > 0) {
-
-      // Determine exponent.
-      if (e < 0) e = i;
-      e += +n.slice(i + 1);
-      n = n.substring(0, i);
-    } else if (e < 0) {
-
-      // Integer.
-      e = n.length;
-    }
-
-    nl = n.length;
-
-    // Determine leading zeros.
-    for (i = 0; i < nl && n.charAt(i) == '0';) ++i;
-
-    if (i == nl) {
-
-      // Zero.
-      x.c = [x.e = 0];
-    } else {
-
-      // Determine trailing zeros.
-      for (; nl > 0 && n.charAt(--nl) == '0';);
-      x.e = e - i - 1;
-      x.c = [];
-
-      // Convert string to array of digits without leading/trailing zeros.
-      for (e = 0; i <= nl;) x.c[e++] = +n.charAt(i++);
-    }
-
-    return x;
-  }
-
-
-  /*
-   * Round Big x to a maximum of sd significant digits using rounding mode rm.
-   *
-   * x {Big} The Big to round.
-   * sd {number} Significant digits: integer, 0 to MAX_DP inclusive.
-   * rm {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
-   * [more] {boolean} Whether the result of division was truncated.
-   */
-  function round(x, sd, rm, more) {
-    var xc = x.c;
-
-    if (rm === UNDEFINED) rm = x.constructor.RM;
-    if (rm !== 0 && rm !== 1 && rm !== 2 && rm !== 3) {
-      throw Error(INVALID_RM);
-    }
-
-    if (sd < 1) {
-      more =
-        rm === 3 && (more || !!xc[0]) || sd === 0 && (
-        rm === 1 && xc[0] >= 5 ||
-        rm === 2 && (xc[0] > 5 || xc[0] === 5 && (more || xc[1] !== UNDEFINED))
-      );
-
-      xc.length = 1;
-
-      if (more) {
-
-        // 1, 0.1, 0.01, 0.001, 0.0001 etc.
-        x.e = x.e - sd + 1;
-        xc[0] = 1;
-      } else {
-
-        // Zero.
-        xc[0] = x.e = 0;
-      }
-    } else if (sd < xc.length) {
-
-      // xc[sd] is the digit after the digit that may be rounded up.
-      more =
-        rm === 1 && xc[sd] >= 5 ||
-        rm === 2 && (xc[sd] > 5 || xc[sd] === 5 &&
-          (more || xc[sd + 1] !== UNDEFINED || xc[sd - 1] & 1)) ||
-        rm === 3 && (more || !!xc[0]);
-
-      // Remove any digits after the required precision.
-      xc.length = sd;
-
-      // Round up?
-      if (more) {
-
-        // Rounding up may mean the previous digit has to be rounded up.
-        for (; ++xc[--sd] > 9;) {
-          xc[sd] = 0;
-          if (sd === 0) {
-            ++x.e;
-            xc.unshift(1);
-            break;
-          }
-        }
-      }
-
-      // Remove trailing zeros.
-      for (sd = xc.length; !xc[--sd];) xc.pop();
-    }
-
-    return x;
-  }
-
-
-  /*
-   * Return a string representing the value of Big x in normal or exponential notation.
-   * Handles P.toExponential, P.toFixed, P.toJSON, P.toPrecision, P.toString and P.valueOf.
-   */
-  function stringify(x, doExponential, isNonzero) {
-    var e = x.e,
-      s = x.c.join(''),
-      n = s.length;
-
-    // Exponential notation?
-    if (doExponential) {
-      s = s.charAt(0) + (n > 1 ? '.' + s.slice(1) : '') + (e < 0 ? 'e' : 'e+') + e;
-
-    // Normal notation.
-    } else if (e < 0) {
-      for (; ++e;) s = '0' + s;
-      s = '0.' + s;
-    } else if (e > 0) {
-      if (++e > n) {
-        for (e -= n; e--;) s += '0';
-      } else if (e < n) {
-        s = s.slice(0, e) + '.' + s.slice(e);
-      }
-    } else if (n > 1) {
-      s = s.charAt(0) + '.' + s.slice(1);
-    }
-
-    return x.s < 0 && isNonzero ? '-' + s : s;
-  }
-
-
-  // Prototype/instance methods
-
-
-  /*
-   * Return a new Big whose value is the absolute value of this Big.
-   */
-  P$2.abs = function () {
-    var x = new this.constructor(this);
-    x.s = 1;
-    return x;
-  };
-
-
-  /*
-   * Return 1 if the value of this Big is greater than the value of Big y,
-   *       -1 if the value of this Big is less than the value of Big y, or
-   *        0 if they have the same value.
-   */
-  P$2.cmp = function (y) {
-    var isneg,
-      x = this,
-      xc = x.c,
-      yc = (y = new x.constructor(y)).c,
-      i = x.s,
-      j = y.s,
-      k = x.e,
-      l = y.e;
-
-    // Either zero?
-    if (!xc[0] || !yc[0]) return !xc[0] ? !yc[0] ? 0 : -j : i;
-
-    // Signs differ?
-    if (i != j) return i;
-
-    isneg = i < 0;
-
-    // Compare exponents.
-    if (k != l) return k > l ^ isneg ? 1 : -1;
-
-    j = (k = xc.length) < (l = yc.length) ? k : l;
-
-    // Compare digit by digit.
-    for (i = -1; ++i < j;) {
-      if (xc[i] != yc[i]) return xc[i] > yc[i] ^ isneg ? 1 : -1;
-    }
-
-    // Compare lengths.
-    return k == l ? 0 : k > l ^ isneg ? 1 : -1;
-  };
-
-
-  /*
-   * Return a new Big whose value is the value of this Big divided by the value of Big y, rounded,
-   * if necessary, to a maximum of Big.DP decimal places using rounding mode Big.RM.
-   */
-  P$2.div = function (y) {
-    var x = this,
-      Big = x.constructor,
-      a = x.c,                  // dividend
-      b = (y = new Big(y)).c,   // divisor
-      k = x.s == y.s ? 1 : -1,
-      dp = Big.DP;
-
-    if (dp !== ~~dp || dp < 0 || dp > MAX_DP) {
-      throw Error(INVALID_DP);
-    }
-
-    // Divisor is zero?
-    if (!b[0]) {
-      throw Error(DIV_BY_ZERO);
-    }
-
-    // Dividend is 0? Return +-0.
-    if (!a[0]) {
-      y.s = k;
-      y.c = [y.e = 0];
-      return y;
-    }
-
-    var bl, bt, n, cmp, ri,
-      bz = b.slice(),
-      ai = bl = b.length,
-      al = a.length,
-      r = a.slice(0, bl),   // remainder
-      rl = r.length,
-      q = y,                // quotient
-      qc = q.c = [],
-      qi = 0,
-      p = dp + (q.e = x.e - y.e) + 1;    // precision of the result
-
-    q.s = k;
-    k = p < 0 ? 0 : p;
-
-    // Create version of divisor with leading zero.
-    bz.unshift(0);
-
-    // Add zeros to make remainder as long as divisor.
-    for (; rl++ < bl;) r.push(0);
-
-    do {
-
-      // n is how many times the divisor goes into current remainder.
-      for (n = 0; n < 10; n++) {
-
-        // Compare divisor and remainder.
-        if (bl != (rl = r.length)) {
-          cmp = bl > rl ? 1 : -1;
-        } else {
-          for (ri = -1, cmp = 0; ++ri < bl;) {
-            if (b[ri] != r[ri]) {
-              cmp = b[ri] > r[ri] ? 1 : -1;
-              break;
-            }
-          }
-        }
-
-        // If divisor < remainder, subtract divisor from remainder.
-        if (cmp < 0) {
-
-          // Remainder can't be more than 1 digit longer than divisor.
-          // Equalise lengths using divisor with extra leading zero?
-          for (bt = rl == bl ? b : bz; rl;) {
-            if (r[--rl] < bt[rl]) {
-              ri = rl;
-              for (; ri && !r[--ri];) r[ri] = 9;
-              --r[ri];
-              r[rl] += 10;
-            }
-            r[rl] -= bt[rl];
-          }
-
-          for (; !r[0];) r.shift();
-        } else {
-          break;
-        }
-      }
-
-      // Add the digit n to the result array.
-      qc[qi++] = cmp ? n : ++n;
-
-      // Update the remainder.
-      if (r[0] && cmp) r[rl] = a[ai] || 0;
-      else r = [a[ai]];
-
-    } while ((ai++ < al || r[0] !== UNDEFINED) && k--);
-
-    // Leading zero? Do not remove if result is simply zero (qi == 1).
-    if (!qc[0] && qi != 1) {
-
-      // There can't be more than one zero.
-      qc.shift();
-      q.e--;
-      p--;
-    }
-
-    // Round?
-    if (qi > p) round(q, p, Big.RM, r[0] !== UNDEFINED);
-
-    return q;
-  };
-
-
-  /*
-   * Return true if the value of this Big is equal to the value of Big y, otherwise return false.
-   */
-  P$2.eq = function (y) {
-    return this.cmp(y) === 0;
-  };
-
-
-  /*
-   * Return true if the value of this Big is greater than the value of Big y, otherwise return
-   * false.
-   */
-  P$2.gt = function (y) {
-    return this.cmp(y) > 0;
-  };
-
-
-  /*
-   * Return true if the value of this Big is greater than or equal to the value of Big y, otherwise
-   * return false.
-   */
-  P$2.gte = function (y) {
-    return this.cmp(y) > -1;
-  };
-
-
-  /*
-   * Return true if the value of this Big is less than the value of Big y, otherwise return false.
-   */
-  P$2.lt = function (y) {
-    return this.cmp(y) < 0;
-  };
-
-
-  /*
-   * Return true if the value of this Big is less than or equal to the value of Big y, otherwise
-   * return false.
-   */
-  P$2.lte = function (y) {
-    return this.cmp(y) < 1;
-  };
-
-
-  /*
-   * Return a new Big whose value is the value of this Big minus the value of Big y.
-   */
-  P$2.minus = P$2.sub = function (y) {
-    var i, j, t, xlty,
-      x = this,
-      Big = x.constructor,
-      a = x.s,
-      b = (y = new Big(y)).s;
-
-    // Signs differ?
-    if (a != b) {
-      y.s = -b;
-      return x.plus(y);
-    }
-
-    var xc = x.c.slice(),
-      xe = x.e,
-      yc = y.c,
-      ye = y.e;
-
-    // Either zero?
-    if (!xc[0] || !yc[0]) {
-      if (yc[0]) {
-        y.s = -b;
-      } else if (xc[0]) {
-        y = new Big(x);
-      } else {
-        y.s = 1;
-      }
-      return y;
-    }
-
-    // Determine which is the bigger number. Prepend zeros to equalise exponents.
-    if (a = xe - ye) {
-
-      if (xlty = a < 0) {
-        a = -a;
-        t = xc;
-      } else {
-        ye = xe;
-        t = yc;
-      }
-
-      t.reverse();
-      for (b = a; b--;) t.push(0);
-      t.reverse();
-    } else {
-
-      // Exponents equal. Check digit by digit.
-      j = ((xlty = xc.length < yc.length) ? xc : yc).length;
-
-      for (a = b = 0; b < j; b++) {
-        if (xc[b] != yc[b]) {
-          xlty = xc[b] < yc[b];
-          break;
-        }
-      }
-    }
-
-    // x < y? Point xc to the array of the bigger number.
-    if (xlty) {
-      t = xc;
-      xc = yc;
-      yc = t;
-      y.s = -y.s;
-    }
-
-    /*
-     * Append zeros to xc if shorter. No need to add zeros to yc if shorter as subtraction only
-     * needs to start at yc.length.
-     */
-    if ((b = (j = yc.length) - (i = xc.length)) > 0) for (; b--;) xc[i++] = 0;
-
-    // Subtract yc from xc.
-    for (b = i; j > a;) {
-      if (xc[--j] < yc[j]) {
-        for (i = j; i && !xc[--i];) xc[i] = 9;
-        --xc[i];
-        xc[j] += 10;
-      }
-
-      xc[j] -= yc[j];
-    }
-
-    // Remove trailing zeros.
-    for (; xc[--b] === 0;) xc.pop();
-
-    // Remove leading zeros and adjust exponent accordingly.
-    for (; xc[0] === 0;) {
-      xc.shift();
-      --ye;
-    }
-
-    if (!xc[0]) {
-
-      // n - n = +0
-      y.s = 1;
-
-      // Result must be zero.
-      xc = [ye = 0];
-    }
-
-    y.c = xc;
-    y.e = ye;
-
-    return y;
-  };
-
-
-  /*
-   * Return a new Big whose value is the value of this Big modulo the value of Big y.
-   */
-  P$2.mod = function (y) {
-    var ygtx,
-      x = this,
-      Big = x.constructor,
-      a = x.s,
-      b = (y = new Big(y)).s;
-
-    if (!y.c[0]) {
-      throw Error(DIV_BY_ZERO);
-    }
-
-    x.s = y.s = 1;
-    ygtx = y.cmp(x) == 1;
-    x.s = a;
-    y.s = b;
-
-    if (ygtx) return new Big(x);
-
-    a = Big.DP;
-    b = Big.RM;
-    Big.DP = Big.RM = 0;
-    x = x.div(y);
-    Big.DP = a;
-    Big.RM = b;
-
-    return this.minus(x.times(y));
-  };
-
-
-  /*
-   * Return a new Big whose value is the value of this Big negated.
-   */
-  P$2.neg = function () {
-    var x = new this.constructor(this);
-    x.s = -x.s;
-    return x;
-  };
-
-
-  /*
-   * Return a new Big whose value is the value of this Big plus the value of Big y.
-   */
-  P$2.plus = P$2.add = function (y) {
-    var e, k, t,
-      x = this,
-      Big = x.constructor;
-
-    y = new Big(y);
-
-    // Signs differ?
-    if (x.s != y.s) {
-      y.s = -y.s;
-      return x.minus(y);
-    }
-
-    var xe = x.e,
-      xc = x.c,
-      ye = y.e,
-      yc = y.c;
-
-    // Either zero?
-    if (!xc[0] || !yc[0]) {
-      if (!yc[0]) {
-        if (xc[0]) {
-          y = new Big(x);
-        } else {
-          y.s = x.s;
-        }
-      }
-      return y;
-    }
-
-    xc = xc.slice();
-
-    // Prepend zeros to equalise exponents.
-    // Note: reverse faster than unshifts.
-    if (e = xe - ye) {
-      if (e > 0) {
-        ye = xe;
-        t = yc;
-      } else {
-        e = -e;
-        t = xc;
-      }
-
-      t.reverse();
-      for (; e--;) t.push(0);
-      t.reverse();
-    }
-
-    // Point xc to the longer array.
-    if (xc.length - yc.length < 0) {
-      t = yc;
-      yc = xc;
-      xc = t;
-    }
-
-    e = yc.length;
-
-    // Only start adding at yc.length - 1 as the further digits of xc can be left as they are.
-    for (k = 0; e; xc[e] %= 10) k = (xc[--e] = xc[e] + yc[e] + k) / 10 | 0;
-
-    // No need to check for zero, as +x + +y != 0 && -x + -y != 0
-
-    if (k) {
-      xc.unshift(k);
-      ++ye;
-    }
-
-    // Remove trailing zeros.
-    for (e = xc.length; xc[--e] === 0;) xc.pop();
-
-    y.c = xc;
-    y.e = ye;
-
-    return y;
-  };
-
-
-  /*
-   * Return a Big whose value is the value of this Big raised to the power n.
-   * If n is negative, round to a maximum of Big.DP decimal places using rounding
-   * mode Big.RM.
-   *
-   * n {number} Integer, -MAX_POWER to MAX_POWER inclusive.
-   */
-  P$2.pow = function (n) {
-    var x = this,
-      one = new x.constructor('1'),
-      y = one,
-      isneg = n < 0;
-
-    if (n !== ~~n || n < -MAX_POWER || n > MAX_POWER) {
-      throw Error(INVALID + 'exponent');
-    }
-
-    if (isneg) n = -n;
-
-    for (;;) {
-      if (n & 1) y = y.times(x);
-      n >>= 1;
-      if (!n) break;
-      x = x.times(x);
-    }
-
-    return isneg ? one.div(y) : y;
-  };
-
-
-  /*
-   * Return a new Big whose value is the value of this Big rounded to a maximum precision of sd
-   * significant digits using rounding mode rm, or Big.RM if rm is not specified.
-   *
-   * sd {number} Significant digits: integer, 1 to MAX_DP inclusive.
-   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
-   */
-  P$2.prec = function (sd, rm) {
-    if (sd !== ~~sd || sd < 1 || sd > MAX_DP) {
-      throw Error(INVALID + 'precision');
-    }
-    return round(new this.constructor(this), sd, rm);
-  };
-
-
-  /*
-   * Return a new Big whose value is the value of this Big rounded to a maximum of dp decimal places
-   * using rounding mode rm, or Big.RM if rm is not specified.
-   * If dp is negative, round to an integer which is a multiple of 10**-dp.
-   * If dp is not specified, round to 0 decimal places.
-   *
-   * dp? {number} Integer, -MAX_DP to MAX_DP inclusive.
-   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
-   */
-  P$2.round = function (dp, rm) {
-    if (dp === UNDEFINED) dp = 0;
-    else if (dp !== ~~dp || dp < -MAX_DP || dp > MAX_DP) {
-      throw Error(INVALID_DP);
-    }
-    return round(new this.constructor(this), dp + this.e + 1, rm);
-  };
-
-
-  /*
-   * Return a new Big whose value is the square root of the value of this Big, rounded, if
-   * necessary, to a maximum of Big.DP decimal places using rounding mode Big.RM.
-   */
-  P$2.sqrt = function () {
-    var r, c, t,
-      x = this,
-      Big = x.constructor,
-      s = x.s,
-      e = x.e,
-      half = new Big('0.5');
-
-    // Zero?
-    if (!x.c[0]) return new Big(x);
-
-    // Negative?
-    if (s < 0) {
-      throw Error(NAME + 'No square root');
-    }
-
-    // Estimate.
-    s = Math.sqrt(x + '');
-
-    // Math.sqrt underflow/overflow?
-    // Re-estimate: pass x coefficient to Math.sqrt as integer, then adjust the result exponent.
-    if (s === 0 || s === 1 / 0) {
-      c = x.c.join('');
-      if (!(c.length + e & 1)) c += '0';
-      s = Math.sqrt(c);
-      e = ((e + 1) / 2 | 0) - (e < 0 || e & 1);
-      r = new Big((s == 1 / 0 ? '5e' : (s = s.toExponential()).slice(0, s.indexOf('e') + 1)) + e);
-    } else {
-      r = new Big(s + '');
-    }
-
-    e = r.e + (Big.DP += 4);
-
-    // Newton-Raphson iteration.
-    do {
-      t = r;
-      r = half.times(t.plus(x.div(t)));
-    } while (t.c.slice(0, e).join('') !== r.c.slice(0, e).join(''));
-
-    return round(r, (Big.DP -= 4) + r.e + 1, Big.RM);
-  };
-
-
-  /*
-   * Return a new Big whose value is the value of this Big times the value of Big y.
-   */
-  P$2.times = P$2.mul = function (y) {
-    var c,
-      x = this,
-      Big = x.constructor,
-      xc = x.c,
-      yc = (y = new Big(y)).c,
-      a = xc.length,
-      b = yc.length,
-      i = x.e,
-      j = y.e;
-
-    // Determine sign of result.
-    y.s = x.s == y.s ? 1 : -1;
-
-    // Return signed 0 if either 0.
-    if (!xc[0] || !yc[0]) {
-      y.c = [y.e = 0];
-      return y;
-    }
-
-    // Initialise exponent of result as x.e + y.e.
-    y.e = i + j;
-
-    // If array xc has fewer digits than yc, swap xc and yc, and lengths.
-    if (a < b) {
-      c = xc;
-      xc = yc;
-      yc = c;
-      j = a;
-      a = b;
-      b = j;
-    }
-
-    // Initialise coefficient array of result with zeros.
-    for (c = new Array(j = a + b); j--;) c[j] = 0;
-
-    // Multiply.
-
-    // i is initially xc.length.
-    for (i = b; i--;) {
-      b = 0;
-
-      // a is yc.length.
-      for (j = a + i; j > i;) {
-
-        // Current sum of products at this digit position, plus carry.
-        b = c[j] + yc[i] * xc[j - i - 1] + b;
-        c[j--] = b % 10;
-
-        // carry
-        b = b / 10 | 0;
-      }
-
-      c[j] = b;
-    }
-
-    // Increment result exponent if there is a final carry, otherwise remove leading zero.
-    if (b) ++y.e;
-    else c.shift();
-
-    // Remove trailing zeros.
-    for (i = c.length; !c[--i];) c.pop();
-    y.c = c;
-
-    return y;
-  };
-
-
-  /*
-   * Return a string representing the value of this Big in exponential notation rounded to dp fixed
-   * decimal places using rounding mode rm, or Big.RM if rm is not specified.
-   *
-   * dp? {number} Decimal places: integer, 0 to MAX_DP inclusive.
-   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
-   */
-  P$2.toExponential = function (dp, rm) {
-    var x = this,
-      n = x.c[0];
-
-    if (dp !== UNDEFINED) {
-      if (dp !== ~~dp || dp < 0 || dp > MAX_DP) {
-        throw Error(INVALID_DP);
-      }
-      x = round(new x.constructor(x), ++dp, rm);
-      for (; x.c.length < dp;) x.c.push(0);
-    }
-
-    return stringify(x, true, !!n);
-  };
-
-
-  /*
-   * Return a string representing the value of this Big in normal notation rounded to dp fixed
-   * decimal places using rounding mode rm, or Big.RM if rm is not specified.
-   *
-   * dp? {number} Decimal places: integer, 0 to MAX_DP inclusive.
-   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
-   *
-   * (-0).toFixed(0) is '0', but (-0.1).toFixed(0) is '-0'.
-   * (-0).toFixed(1) is '0.0', but (-0.01).toFixed(1) is '-0.0'.
-   */
-  P$2.toFixed = function (dp, rm) {
-    var x = this,
-      n = x.c[0];
-
-    if (dp !== UNDEFINED) {
-      if (dp !== ~~dp || dp < 0 || dp > MAX_DP) {
-        throw Error(INVALID_DP);
-      }
-      x = round(new x.constructor(x), dp + x.e + 1, rm);
-
-      // x.e may have changed if the value is rounded up.
-      for (dp = dp + x.e + 1; x.c.length < dp;) x.c.push(0);
-    }
-
-    return stringify(x, false, !!n);
-  };
-
-
-  /*
-   * Return a string representing the value of this Big.
-   * Return exponential notation if this Big has a positive exponent equal to or greater than
-   * Big.PE, or a negative exponent equal to or less than Big.NE.
-   * Omit the sign for negative zero.
-   */
-  P$2[Symbol.for('nodejs.util.inspect.custom')] = P$2.toJSON = P$2.toString = function () {
-    var x = this,
-      Big = x.constructor;
-    return stringify(x, x.e <= Big.NE || x.e >= Big.PE, !!x.c[0]);
-  };
-
-
-  /*
-   * Return the value of this Big as a primitve number.
-   */
-  P$2.toNumber = function () {
-    var n = Number(stringify(this, true, true));
-    if (this.constructor.strict === true && !this.eq(n.toString())) {
-      throw Error(NAME + 'Imprecise conversion');
-    }
-    return n;
-  };
-
-
-  /*
-   * Return a string representing the value of this Big rounded to sd significant digits using
-   * rounding mode rm, or Big.RM if rm is not specified.
-   * Use exponential notation if sd is less than the number of digits necessary to represent
-   * the integer part of the value in normal notation.
-   *
-   * sd {number} Significant digits: integer, 1 to MAX_DP inclusive.
-   * rm? {number} Rounding mode: 0 (down), 1 (half-up), 2 (half-even) or 3 (up).
-   */
-  P$2.toPrecision = function (sd, rm) {
-    var x = this,
-      Big = x.constructor,
-      n = x.c[0];
-
-    if (sd !== UNDEFINED) {
-      if (sd !== ~~sd || sd < 1 || sd > MAX_DP) {
-        throw Error(INVALID + 'precision');
-      }
-      x = round(new Big(x), sd, rm);
-      for (; x.c.length < sd;) x.c.push(0);
-    }
-
-    return stringify(x, sd <= x.e || x.e <= Big.NE || x.e >= Big.PE, !!n);
-  };
-
-
-  /*
-   * Return a string representing the value of this Big.
-   * Return exponential notation if this Big has a positive exponent equal to or greater than
-   * Big.PE, or a negative exponent equal to or less than Big.NE.
-   * Include the sign for negative zero.
-   */
-  P$2.valueOf = function () {
-    var x = this,
-      Big = x.constructor;
-    if (Big.strict === true) {
-      throw Error(NAME + 'valueOf disallowed');
-    }
-    return stringify(x, x.e <= Big.NE || x.e >= Big.PE, true);
-  };
-
-
-  // Export
-
-
-  var Big = _Big_();
-
-  var classnamesExports = {};
-  var classnames = {
-    get exports(){ return classnamesExports; },
-    set exports(v){ classnamesExports = v; },
-  };
-
-  /*!
-  	Copyright (c) 2018 Jed Watson.
-  	Licensed under the MIT License (MIT), see
-  	http://jedwatson.github.io/classnames
-  */
-
-  (function (module) {
-  	/* global define */
-
-  	(function () {
-
-  		var hasOwn = {}.hasOwnProperty;
-
-  		function classNames() {
-  			var classes = [];
-
-  			for (var i = 0; i < arguments.length; i++) {
-  				var arg = arguments[i];
-  				if (!arg) continue;
-
-  				var argType = typeof arg;
-
-  				if (argType === 'string' || argType === 'number') {
-  					classes.push(arg);
-  				} else if (Array.isArray(arg)) {
-  					if (arg.length) {
-  						var inner = classNames.apply(null, arg);
-  						if (inner) {
-  							classes.push(inner);
-  						}
-  					}
-  				} else if (argType === 'object') {
-  					if (arg.toString !== Object.prototype.toString && !arg.toString.toString().includes('[native code]')) {
-  						classes.push(arg.toString());
-  						continue;
-  					}
-
-  					for (var key in arg) {
-  						if (hasOwn.call(arg, key) && arg[key]) {
-  							classes.push(key);
-  						}
-  					}
-  				}
-  			}
-
-  			return classes.join(' ');
-  		}
-
-  		if (module.exports) {
-  			classNames.default = classNames;
-  			module.exports = classNames;
-  		} else {
-  			window.classNames = classNames;
-  		}
-  	}());
-  } (classnames));
-
-  var classNames = classnamesExports;
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+  var e,o={};function n(r,t,e){if(3===r.nodeType){var o="textContent"in r?r.textContent:r.nodeValue||"";if(!1!==n.options.trim){var a=0===t||t===e.length-1;if((!(o=o.match(/^[\s\n]+$/g)&&"all"!==n.options.trim?" ":o.replace(/(^[\s\n]+|[\s\n]+$)/g,"all"===n.options.trim||a?"":" "))||" "===o)&&e.length>1&&a)return null}return o}if(1!==r.nodeType)return null;var p=String(r.nodeName).toLowerCase();if("script"===p&&!n.options.allowScripts)return null;var l,s,u=n.h(p,function(r){var t=r&&r.length;if(!t)return null;for(var e={},o=0;o<t;o++){var a=r[o],i=a.name,p=a.value;"on"===i.substring(0,2)&&n.options.allowEvents&&(p=new Function(p)),e[i]=p;}return e}(r.attributes),(s=(l=r.childNodes)&&Array.prototype.map.call(l,n).filter(i))&&s.length?s:null);return n.visitor&&n.visitor(u),u}var a,i=function(r){return r},p={};function l(r){var t=(r.type||"").toLowerCase(),e=l.map;e&&e.hasOwnProperty(t)?(r.type=e[t],r.props=Object.keys(r.props||{}).reduce(function(t,e){var o;return t[(o=e,o.replace(/-(.)/g,function(r,t){return t.toUpperCase()}))]=r.props[e],t},{})):r.type=t.replace(/[^a-z0-9-]/i,"");}var Markup = (function(t){function i(){t.apply(this,arguments);}return t&&(i.__proto__=t),(i.prototype=Object.create(t&&t.prototype)).constructor=i,i.setReviver=function(r){a=r;},i.prototype.shouldComponentUpdate=function(r){var t=this.props;return r.wrap!==t.wrap||r.type!==t.type||r.markup!==t.markup},i.prototype.setComponents=function(r){if(this.map={},r)for(var t in r)if(r.hasOwnProperty(t)){var e=t.replace(/([A-Z]+)([A-Z][a-z0-9])|([a-z0-9]+)([A-Z])/g,"$1$3-$2$4").toLowerCase();this.map[e]=r[t];}},i.prototype.render=function(t){var i=t.wrap;void 0===i&&(i=!0);var s,u=t.type,c=t.markup,m=t.components,v=t.reviver,f=t.onError,d=t["allow-scripts"],h=t["allow-events"],y=t.trim,w=function(r,t){var e={};for(var o in r)Object.prototype.hasOwnProperty.call(r,o)&&-1===t.indexOf(o)&&(e[o]=r[o]);return e}(t,["wrap","type","markup","components","reviver","onError","allow-scripts","allow-events","trim"]),C=v||this.reviver||this.constructor.prototype.reviver||a||v$1;this.setComponents(m);var g={allowScripts:d,allowEvents:h,trim:y};try{s=function(r,t,a,i,s){var u=function(r,t){var o,n,a,i,p="html"===t?"text/html":"application/xml";"html"===t?(i="body",a="<!DOCTYPE html>\n<html><body>"+r+"</body></html>"):(i="xml",a='<?xml version="1.0" encoding="UTF-8"?>\n<xml>'+r+"</xml>");try{o=(new DOMParser).parseFromString(a,p);}catch(r){n=r;}if(o||"html"!==t||((o=e||(e=function(){if(document.implementation&&document.implementation.createHTMLDocument)return document.implementation.createHTMLDocument("");var r=document.createElement("iframe");return r.style.cssText="position:absolute; left:0; top:-999em; width:1px; height:1px; overflow:hidden;",r.setAttribute("sandbox","allow-forms"),document.body.appendChild(r),r.contentWindow.document}())).open(),o.write(a),o.close()),o){var l=o.getElementsByTagName(i)[0],s=l.firstChild;return r&&!s&&(l.error="Document parse failed."),s&&"parsererror"===String(s.nodeName).toLowerCase()&&(s.removeChild(s.firstChild),s.removeChild(s.lastChild),l.error=s.textContent||s.nodeValue||n||"Unknown error",l.removeChild(s)),l}}(r,t);if(u&&u.error)throw new Error(u.error);var c=u&&u.body||u;l.map=i||p;var m=c&&function(r,t,e,a){return n.visitor=t,n.h=e,n.options=a||o,n(r)}(c,l,a,s);return l.map=null,m&&m.props&&m.props.children||null}(c,u,C,this.map,g);}catch(r){f?f({error:r}):"undefined"!=typeof console&&console.error&&console.error("preact-markup: "+r);}if(!1===i)return s||null;var x=w.hasOwnProperty("className")?"className":"class",b=w[x];return b?b.splice?b.splice(0,0,"markup"):"string"==typeof b?w[x]+=" markup":"object"==typeof b&&(b.markup=!0):w[x]="markup",C("div",w,s||null)},i}(_));
+
+  const CLASS_PATTERN = /^class[ {]/;
+
+
+  /**
+   * @param {function} fn
+   *
+   * @return {boolean}
+   */
+  function isClass(fn) {
+    return CLASS_PATTERN.test(fn.toString());
+  }
+
+  /**
+   * @param {any} obj
+   *
+   * @return {boolean}
+   */
+  function isArray(obj) {
+    return Array.isArray(obj);
+  }
+
+  /**
+   * @param {any} obj
+   * @param {string} prop
+   *
+   * @return {boolean}
+   */
+  function hasOwnProp(obj, prop) {
+    return Object.prototype.hasOwnProperty.call(obj, prop);
+  }
+
+  /**
+   * @typedef {import('./index').InjectAnnotated } InjectAnnotated
+   */
+
+  /**
+   * @template T
+   *
+   * @params {[...string[], T] | ...string[], T} args
+   *
+   * @return {T & InjectAnnotated}
+   */
+  function annotate(...args) {
+
+    if (args.length === 1 && isArray(args[0])) {
+      args = args[0];
+    }
+
+    args = [ ...args ];
+
+    const fn = args.pop();
+
+    fn.$inject = args;
+
+    return fn;
+  }
+
+
+  // Current limitations:
+  // - can't put into "function arg" comments
+  // function /* (no parenthesis like this) */ (){}
+  // function abc( /* xx (no parenthesis like this) */ a, b) {}
+  //
+  // Just put the comment before function or inside:
+  // /* (((this is fine))) */ function(a, b) {}
+  // function abc(a) { /* (((this is fine))) */}
+  //
+  // - can't reliably auto-annotate constructor; we'll match the
+  // first constructor(...) pattern found which may be the one
+  // of a nested class, too.
+
+  const CONSTRUCTOR_ARGS = /constructor\s*[^(]*\(\s*([^)]*)\)/m;
+  const FN_ARGS = /^(?:async\s+)?(?:function\s*[^(]*)?(?:\(\s*([^)]*)\)|(\w+))/m;
+  const FN_ARG = /\/\*([^*]*)\*\//m;
+
+  /**
+   * @param {unknown} fn
+   *
+   * @return {string[]}
+   */
+  function parseAnnotations(fn) {
+
+    if (typeof fn !== 'function') {
+      throw new Error(`Cannot annotate "${fn}". Expected a function!`);
+    }
+
+    const match = fn.toString().match(isClass(fn) ? CONSTRUCTOR_ARGS : FN_ARGS);
+
+    // may parse class without constructor
+    if (!match) {
+      return [];
+    }
+
+    const args = match[1] || match[2];
+
+    return args && args.split(',').map(arg => {
+      const argMatch = arg.match(FN_ARG);
+      return (argMatch && argMatch[1] || arg).trim();
+    }) || [];
+  }
+
+  /**
+   * @typedef { import('./index').ModuleDeclaration } ModuleDeclaration
+   * @typedef { import('./index').ModuleDefinition } ModuleDefinition
+   * @typedef { import('./index').InjectorContext } InjectorContext
+   */
+
+  /**
+   * Create a new injector with the given modules.
+   *
+   * @param {ModuleDefinition[]} modules
+   * @param {InjectorContext} [parent]
+   */
+  function Injector(modules, parent) {
+    parent = parent || {
+      get: function(name, strict) {
+        currentlyResolving.push(name);
+
+        if (strict === false) {
+          return null;
+        } else {
+          throw error(`No provider for "${ name }"!`);
+        }
+      }
+    };
+
+    const currentlyResolving = [];
+    const providers = this._providers = Object.create(parent._providers || null);
+    const instances = this._instances = Object.create(null);
+
+    const self = instances.injector = this;
+
+    const error = function(msg) {
+      const stack = currentlyResolving.join(' -> ');
+      currentlyResolving.length = 0;
+      return new Error(stack ? `${ msg } (Resolving: ${ stack })` : msg);
+    };
+
+    /**
+     * Return a named service.
+     *
+     * @param {string} name
+     * @param {boolean} [strict=true] if false, resolve missing services to null
+     *
+     * @return {any}
+     */
+    function get(name, strict) {
+      if (!providers[name] && name.indexOf('.') !== -1) {
+        const parts = name.split('.');
+        let pivot = get(parts.shift());
+
+        while (parts.length) {
+          pivot = pivot[parts.shift()];
+        }
+
+        return pivot;
+      }
+
+      if (hasOwnProp(instances, name)) {
+        return instances[name];
+      }
+
+      if (hasOwnProp(providers, name)) {
+        if (currentlyResolving.indexOf(name) !== -1) {
+          currentlyResolving.push(name);
+          throw error('Cannot resolve circular dependency!');
+        }
+
+        currentlyResolving.push(name);
+        instances[name] = providers[name][0](providers[name][1]);
+        currentlyResolving.pop();
+
+        return instances[name];
+      }
+
+      return parent.get(name, strict);
+    }
+
+    function fnDef(fn, locals) {
+
+      if (typeof locals === 'undefined') {
+        locals = {};
+      }
+
+      if (typeof fn !== 'function') {
+        if (isArray(fn)) {
+          fn = annotate(fn.slice());
+        } else {
+          throw error(`Cannot invoke "${ fn }". Expected a function!`);
+        }
+      }
+
+      const inject = fn.$inject || parseAnnotations(fn);
+      const dependencies = inject.map(dep => {
+        if (hasOwnProp(locals, dep)) {
+          return locals[dep];
+        } else {
+          return get(dep);
+        }
+      });
+
+      return {
+        fn: fn,
+        dependencies: dependencies
+      };
+    }
+
+    function instantiate(Type) {
+      const {
+        fn,
+        dependencies
+      } = fnDef(Type);
+
+      // instantiate var args constructor
+      const Constructor = Function.prototype.bind.apply(fn, [ null ].concat(dependencies));
+
+      return new Constructor();
+    }
+
+    function invoke(func, context, locals) {
+      const {
+        fn,
+        dependencies
+      } = fnDef(func, locals);
+
+      return fn.apply(context, dependencies);
+    }
+
+    /**
+     * @param {Injector} childInjector
+     *
+     * @return {Function}
+     */
+    function createPrivateInjectorFactory(childInjector) {
+      return annotate(key => childInjector.get(key));
+    }
+
+    /**
+     * @param {ModuleDefinition[]} modules
+     * @param {string[]} [forceNewInstances]
+     *
+     * @return {Injector}
+     */
+    function createChild(modules, forceNewInstances) {
+      if (forceNewInstances && forceNewInstances.length) {
+        const fromParentModule = Object.create(null);
+        const matchedScopes = Object.create(null);
+
+        const privateInjectorsCache = [];
+        const privateChildInjectors = [];
+        const privateChildFactories = [];
+
+        let provider;
+        let cacheIdx;
+        let privateChildInjector;
+        let privateChildInjectorFactory;
+
+        for (let name in providers) {
+          provider = providers[name];
+
+          if (forceNewInstances.indexOf(name) !== -1) {
+            if (provider[2] === 'private') {
+              cacheIdx = privateInjectorsCache.indexOf(provider[3]);
+              if (cacheIdx === -1) {
+                privateChildInjector = provider[3].createChild([], forceNewInstances);
+                privateChildInjectorFactory = createPrivateInjectorFactory(privateChildInjector);
+                privateInjectorsCache.push(provider[3]);
+                privateChildInjectors.push(privateChildInjector);
+                privateChildFactories.push(privateChildInjectorFactory);
+                fromParentModule[name] = [ privateChildInjectorFactory, name, 'private', privateChildInjector ];
+              } else {
+                fromParentModule[name] = [ privateChildFactories[cacheIdx], name, 'private', privateChildInjectors[cacheIdx] ];
+              }
+            } else {
+              fromParentModule[name] = [ provider[2], provider[1] ];
+            }
+            matchedScopes[name] = true;
+          }
+
+          if ((provider[2] === 'factory' || provider[2] === 'type') && provider[1].$scope) {
+            /* jshint -W083 */
+            forceNewInstances.forEach(scope => {
+              if (provider[1].$scope.indexOf(scope) !== -1) {
+                fromParentModule[name] = [ provider[2], provider[1] ];
+                matchedScopes[scope] = true;
+              }
+            });
+          }
+        }
+
+        forceNewInstances.forEach(scope => {
+          if (!matchedScopes[scope]) {
+            throw new Error('No provider for "' + scope + '". Cannot use provider from the parent!');
+          }
+        });
+
+        modules.unshift(fromParentModule);
+      }
+
+      return new Injector(modules, self);
+    }
+
+    const factoryMap = {
+      factory: invoke,
+      type: instantiate,
+      value: function(value) {
+        return value;
+      }
+    };
+
+    /**
+     * @param {ModuleDefinition} moduleDefinition
+     * @param {Injector} injector
+     */
+    function createInitializer(moduleDefinition, injector) {
+
+      const initializers = moduleDefinition.__init__ || [];
+
+      return function() {
+        initializers.forEach(initializer => {
+
+          // eagerly resolve component (fn or string)
+          if (typeof initializer === 'string') {
+            injector.get(initializer);
+          } else {
+            injector.invoke(initializer);
+          }
+        });
+      };
+    }
+
+    /**
+     * @param {ModuleDefinition} moduleDefinition
+     */
+    function loadModule(moduleDefinition) {
+
+      const moduleExports = moduleDefinition.__exports__;
+
+      // private module
+      if (moduleExports) {
+        const nestedModules = moduleDefinition.__modules__;
+
+        const clonedModule = Object.keys(moduleDefinition).reduce((clonedModule, key) => {
+
+          if (key !== '__exports__' && key !== '__modules__' && key !== '__init__' && key !== '__depends__') {
+            clonedModule[key] = moduleDefinition[key];
+          }
+
+          return clonedModule;
+        }, Object.create(null));
+
+        const childModules = (nestedModules || []).concat(clonedModule);
+
+        const privateInjector = createChild(childModules);
+        const getFromPrivateInjector = annotate(function(key) {
+          return privateInjector.get(key);
+        });
+
+        moduleExports.forEach(function(key) {
+          providers[key] = [ getFromPrivateInjector, key, 'private', privateInjector ];
+        });
+
+        // ensure child injector initializes
+        const initializers = (moduleDefinition.__init__ || []).slice();
+
+        initializers.unshift(function() {
+          privateInjector.init();
+        });
+
+        moduleDefinition = Object.assign({}, moduleDefinition, {
+          __init__: initializers
+        });
+
+        return createInitializer(moduleDefinition, privateInjector);
+      }
+
+      // normal module
+      Object.keys(moduleDefinition).forEach(function(key) {
+
+        if (key === '__init__' || key === '__depends__') {
+          return;
+        }
+
+        if (moduleDefinition[key][2] === 'private') {
+          providers[key] = moduleDefinition[key];
+          return;
+        }
+
+        const type = moduleDefinition[key][0];
+        const value = moduleDefinition[key][1];
+
+        providers[key] = [ factoryMap[type], arrayUnwrap(type, value), type ];
+      });
+
+      return createInitializer(moduleDefinition, self);
+    }
+
+    /**
+     * @param {ModuleDefinition[]} moduleDefinitions
+     * @param {ModuleDefinition} moduleDefinition
+     *
+     * @return {ModuleDefinition[]}
+     */
+    function resolveDependencies(moduleDefinitions, moduleDefinition) {
+
+      if (moduleDefinitions.indexOf(moduleDefinition) !== -1) {
+        return moduleDefinitions;
+      }
+
+      moduleDefinitions = (moduleDefinition.__depends__ || []).reduce(resolveDependencies, moduleDefinitions);
+
+      if (moduleDefinitions.indexOf(moduleDefinition) !== -1) {
+        return moduleDefinitions;
+      }
+
+      return moduleDefinitions.concat(moduleDefinition);
+    }
+
+    /**
+     * @param {ModuleDefinition[]} moduleDefinitions
+     *
+     * @return { () => void } initializerFn
+     */
+    function bootstrap(moduleDefinitions) {
+
+      const initializers = moduleDefinitions
+        .reduce(resolveDependencies, [])
+        .map(loadModule);
+
+      let initialized = false;
+
+      return function() {
+
+        if (initialized) {
+          return;
+        }
+
+        initialized = true;
+
+        initializers.forEach(initializer => initializer());
+      };
+    }
+
+    // public API
+    this.get = get;
+    this.invoke = invoke;
+    this.instantiate = instantiate;
+    this.createChild = createChild;
+
+    // setup
+    this.init = bootstrap(modules);
+  }
+
+
+  // helpers ///////////////
+
+  function arrayUnwrap(type, value) {
+    if (type !== 'value' && isArray(value)) {
+      value = annotate(value.slice());
+    }
+
+    return value;
+  }
+
+  var showdown$1 = {exports: {}};
+
+  (function (module) {
+  	(function(){
+  	/**
+  	 * Created by Tivie on 13-07-2015.
+  	 */
+
+  	function getDefaultOpts (simple) {
+
+  	  var defaultOptions = {
+  	    omitExtraWLInCodeBlocks: {
+  	      defaultValue: false,
+  	      describe: 'Omit the default extra whiteline added to code blocks',
+  	      type: 'boolean'
+  	    },
+  	    noHeaderId: {
+  	      defaultValue: false,
+  	      describe: 'Turn on/off generated header id',
+  	      type: 'boolean'
+  	    },
+  	    prefixHeaderId: {
+  	      defaultValue: false,
+  	      describe: 'Add a prefix to the generated header ids. Passing a string will prefix that string to the header id. Setting to true will add a generic \'section-\' prefix',
+  	      type: 'string'
+  	    },
+  	    rawPrefixHeaderId: {
+  	      defaultValue: false,
+  	      describe: 'Setting this option to true will prevent showdown from modifying the prefix. This might result in malformed IDs (if, for instance, the " char is used in the prefix)',
+  	      type: 'boolean'
+  	    },
+  	    ghCompatibleHeaderId: {
+  	      defaultValue: false,
+  	      describe: 'Generate header ids compatible with github style (spaces are replaced with dashes, a bunch of non alphanumeric chars are removed)',
+  	      type: 'boolean'
+  	    },
+  	    rawHeaderId: {
+  	      defaultValue: false,
+  	      describe: 'Remove only spaces, \' and " from generated header ids (including prefixes), replacing them with dashes (-). WARNING: This might result in malformed ids',
+  	      type: 'boolean'
+  	    },
+  	    headerLevelStart: {
+  	      defaultValue: false,
+  	      describe: 'The header blocks level start',
+  	      type: 'integer'
+  	    },
+  	    parseImgDimensions: {
+  	      defaultValue: false,
+  	      describe: 'Turn on/off image dimension parsing',
+  	      type: 'boolean'
+  	    },
+  	    simplifiedAutoLink: {
+  	      defaultValue: false,
+  	      describe: 'Turn on/off GFM autolink style',
+  	      type: 'boolean'
+  	    },
+  	    excludeTrailingPunctuationFromURLs: {
+  	      defaultValue: false,
+  	      describe: 'Excludes trailing punctuation from links generated with autoLinking',
+  	      type: 'boolean'
+  	    },
+  	    literalMidWordUnderscores: {
+  	      defaultValue: false,
+  	      describe: 'Parse midword underscores as literal underscores',
+  	      type: 'boolean'
+  	    },
+  	    literalMidWordAsterisks: {
+  	      defaultValue: false,
+  	      describe: 'Parse midword asterisks as literal asterisks',
+  	      type: 'boolean'
+  	    },
+  	    strikethrough: {
+  	      defaultValue: false,
+  	      describe: 'Turn on/off strikethrough support',
+  	      type: 'boolean'
+  	    },
+  	    tables: {
+  	      defaultValue: false,
+  	      describe: 'Turn on/off tables support',
+  	      type: 'boolean'
+  	    },
+  	    tablesHeaderId: {
+  	      defaultValue: false,
+  	      describe: 'Add an id to table headers',
+  	      type: 'boolean'
+  	    },
+  	    ghCodeBlocks: {
+  	      defaultValue: true,
+  	      describe: 'Turn on/off GFM fenced code blocks support',
+  	      type: 'boolean'
+  	    },
+  	    tasklists: {
+  	      defaultValue: false,
+  	      describe: 'Turn on/off GFM tasklist support',
+  	      type: 'boolean'
+  	    },
+  	    smoothLivePreview: {
+  	      defaultValue: false,
+  	      describe: 'Prevents weird effects in live previews due to incomplete input',
+  	      type: 'boolean'
+  	    },
+  	    smartIndentationFix: {
+  	      defaultValue: false,
+  	      describe: 'Tries to smartly fix indentation in es6 strings',
+  	      type: 'boolean'
+  	    },
+  	    disableForced4SpacesIndentedSublists: {
+  	      defaultValue: false,
+  	      describe: 'Disables the requirement of indenting nested sublists by 4 spaces',
+  	      type: 'boolean'
+  	    },
+  	    simpleLineBreaks: {
+  	      defaultValue: false,
+  	      describe: 'Parses simple line breaks as <br> (GFM Style)',
+  	      type: 'boolean'
+  	    },
+  	    requireSpaceBeforeHeadingText: {
+  	      defaultValue: false,
+  	      describe: 'Makes adding a space between `#` and the header text mandatory (GFM Style)',
+  	      type: 'boolean'
+  	    },
+  	    ghMentions: {
+  	      defaultValue: false,
+  	      describe: 'Enables github @mentions',
+  	      type: 'boolean'
+  	    },
+  	    ghMentionsLink: {
+  	      defaultValue: 'https://github.com/{u}',
+  	      describe: 'Changes the link generated by @mentions. Only applies if ghMentions option is enabled.',
+  	      type: 'string'
+  	    },
+  	    encodeEmails: {
+  	      defaultValue: true,
+  	      describe: 'Encode e-mail addresses through the use of Character Entities, transforming ASCII e-mail addresses into its equivalent decimal entities',
+  	      type: 'boolean'
+  	    },
+  	    openLinksInNewWindow: {
+  	      defaultValue: false,
+  	      describe: 'Open all links in new windows',
+  	      type: 'boolean'
+  	    },
+  	    backslashEscapesHTMLTags: {
+  	      defaultValue: false,
+  	      describe: 'Support for HTML Tag escaping. ex: \<div>foo\</div>',
+  	      type: 'boolean'
+  	    },
+  	    emoji: {
+  	      defaultValue: false,
+  	      describe: 'Enable emoji support. Ex: `this is a :smile: emoji`',
+  	      type: 'boolean'
+  	    },
+  	    underline: {
+  	      defaultValue: false,
+  	      describe: 'Enable support for underline. Syntax is double or triple underscores: `__underline word__`. With this option enabled, underscores no longer parses into `<em>` and `<strong>`',
+  	      type: 'boolean'
+  	    },
+  	    ellipsis: {
+  	      defaultValue: true,
+  	      describe: 'Replaces three dots with the ellipsis unicode character',
+  	      type: 'boolean'
+  	    },
+  	    completeHTMLDocument: {
+  	      defaultValue: false,
+  	      describe: 'Outputs a complete html document, including `<html>`, `<head>` and `<body>` tags',
+  	      type: 'boolean'
+  	    },
+  	    metadata: {
+  	      defaultValue: false,
+  	      describe: 'Enable support for document metadata (defined at the top of the document between `«««` and `»»»` or between `---` and `---`).',
+  	      type: 'boolean'
+  	    },
+  	    splitAdjacentBlockquotes: {
+  	      defaultValue: false,
+  	      describe: 'Split adjacent blockquote blocks',
+  	      type: 'boolean'
+  	    }
+  	  };
+  	  if (simple === false) {
+  	    return JSON.parse(JSON.stringify(defaultOptions));
+  	  }
+  	  var ret = {};
+  	  for (var opt in defaultOptions) {
+  	    if (defaultOptions.hasOwnProperty(opt)) {
+  	      ret[opt] = defaultOptions[opt].defaultValue;
+  	    }
+  	  }
+  	  return ret;
+  	}
+
+  	function allOptionsOn () {
+  	  var options = getDefaultOpts(true),
+  	      ret = {};
+  	  for (var opt in options) {
+  	    if (options.hasOwnProperty(opt)) {
+  	      ret[opt] = true;
+  	    }
+  	  }
+  	  return ret;
+  	}
+
+  	/**
+  	 * Created by Tivie on 06-01-2015.
+  	 */
+
+  	// Private properties
+  	var showdown = {},
+  	    parsers = {},
+  	    extensions = {},
+  	    globalOptions = getDefaultOpts(true),
+  	    setFlavor = 'vanilla',
+  	    flavor = {
+  	      github: {
+  	        omitExtraWLInCodeBlocks:              true,
+  	        simplifiedAutoLink:                   true,
+  	        excludeTrailingPunctuationFromURLs:   true,
+  	        literalMidWordUnderscores:            true,
+  	        strikethrough:                        true,
+  	        tables:                               true,
+  	        tablesHeaderId:                       true,
+  	        ghCodeBlocks:                         true,
+  	        tasklists:                            true,
+  	        disableForced4SpacesIndentedSublists: true,
+  	        simpleLineBreaks:                     true,
+  	        requireSpaceBeforeHeadingText:        true,
+  	        ghCompatibleHeaderId:                 true,
+  	        ghMentions:                           true,
+  	        backslashEscapesHTMLTags:             true,
+  	        emoji:                                true,
+  	        splitAdjacentBlockquotes:             true
+  	      },
+  	      original: {
+  	        noHeaderId:                           true,
+  	        ghCodeBlocks:                         false
+  	      },
+  	      ghost: {
+  	        omitExtraWLInCodeBlocks:              true,
+  	        parseImgDimensions:                   true,
+  	        simplifiedAutoLink:                   true,
+  	        excludeTrailingPunctuationFromURLs:   true,
+  	        literalMidWordUnderscores:            true,
+  	        strikethrough:                        true,
+  	        tables:                               true,
+  	        tablesHeaderId:                       true,
+  	        ghCodeBlocks:                         true,
+  	        tasklists:                            true,
+  	        smoothLivePreview:                    true,
+  	        simpleLineBreaks:                     true,
+  	        requireSpaceBeforeHeadingText:        true,
+  	        ghMentions:                           false,
+  	        encodeEmails:                         true
+  	      },
+  	      vanilla: getDefaultOpts(true),
+  	      allOn: allOptionsOn()
+  	    };
+
+  	/**
+  	 * helper namespace
+  	 * @type {{}}
+  	 */
+  	showdown.helper = {};
+
+  	/**
+  	 * TODO LEGACY SUPPORT CODE
+  	 * @type {{}}
+  	 */
+  	showdown.extensions = {};
+
+  	/**
+  	 * Set a global option
+  	 * @static
+  	 * @param {string} key
+  	 * @param {*} value
+  	 * @returns {showdown}
+  	 */
+  	showdown.setOption = function (key, value) {
+  	  globalOptions[key] = value;
+  	  return this;
+  	};
+
+  	/**
+  	 * Get a global option
+  	 * @static
+  	 * @param {string} key
+  	 * @returns {*}
+  	 */
+  	showdown.getOption = function (key) {
+  	  return globalOptions[key];
+  	};
+
+  	/**
+  	 * Get the global options
+  	 * @static
+  	 * @returns {{}}
+  	 */
+  	showdown.getOptions = function () {
+  	  return globalOptions;
+  	};
+
+  	/**
+  	 * Reset global options to the default values
+  	 * @static
+  	 */
+  	showdown.resetOptions = function () {
+  	  globalOptions = getDefaultOpts(true);
+  	};
+
+  	/**
+  	 * Set the flavor showdown should use as default
+  	 * @param {string} name
+  	 */
+  	showdown.setFlavor = function (name) {
+  	  if (!flavor.hasOwnProperty(name)) {
+  	    throw Error(name + ' flavor was not found');
+  	  }
+  	  showdown.resetOptions();
+  	  var preset = flavor[name];
+  	  setFlavor = name;
+  	  for (var option in preset) {
+  	    if (preset.hasOwnProperty(option)) {
+  	      globalOptions[option] = preset[option];
+  	    }
+  	  }
+  	};
+
+  	/**
+  	 * Get the currently set flavor
+  	 * @returns {string}
+  	 */
+  	showdown.getFlavor = function () {
+  	  return setFlavor;
+  	};
+
+  	/**
+  	 * Get the options of a specified flavor. Returns undefined if the flavor was not found
+  	 * @param {string} name Name of the flavor
+  	 * @returns {{}|undefined}
+  	 */
+  	showdown.getFlavorOptions = function (name) {
+  	  if (flavor.hasOwnProperty(name)) {
+  	    return flavor[name];
+  	  }
+  	};
+
+  	/**
+  	 * Get the default options
+  	 * @static
+  	 * @param {boolean} [simple=true]
+  	 * @returns {{}}
+  	 */
+  	showdown.getDefaultOptions = function (simple) {
+  	  return getDefaultOpts(simple);
+  	};
+
+  	/**
+  	 * Get or set a subParser
+  	 *
+  	 * subParser(name)       - Get a registered subParser
+  	 * subParser(name, func) - Register a subParser
+  	 * @static
+  	 * @param {string} name
+  	 * @param {function} [func]
+  	 * @returns {*}
+  	 */
+  	showdown.subParser = function (name, func) {
+  	  if (showdown.helper.isString(name)) {
+  	    if (typeof func !== 'undefined') {
+  	      parsers[name] = func;
+  	    } else {
+  	      if (parsers.hasOwnProperty(name)) {
+  	        return parsers[name];
+  	      } else {
+  	        throw Error('SubParser named ' + name + ' not registered!');
+  	      }
+  	    }
+  	  }
+  	};
+
+  	/**
+  	 * Gets or registers an extension
+  	 * @static
+  	 * @param {string} name
+  	 * @param {object|object[]|function=} ext
+  	 * @returns {*}
+  	 */
+  	showdown.extension = function (name, ext) {
+
+  	  if (!showdown.helper.isString(name)) {
+  	    throw Error('Extension \'name\' must be a string');
+  	  }
+
+  	  name = showdown.helper.stdExtName(name);
+
+  	  // Getter
+  	  if (showdown.helper.isUndefined(ext)) {
+  	    if (!extensions.hasOwnProperty(name)) {
+  	      throw Error('Extension named ' + name + ' is not registered!');
+  	    }
+  	    return extensions[name];
+
+  	    // Setter
+  	  } else {
+  	    // Expand extension if it's wrapped in a function
+  	    if (typeof ext === 'function') {
+  	      ext = ext();
+  	    }
+
+  	    // Ensure extension is an array
+  	    if (!showdown.helper.isArray(ext)) {
+  	      ext = [ext];
+  	    }
+
+  	    var validExtension = validate(ext, name);
+
+  	    if (validExtension.valid) {
+  	      extensions[name] = ext;
+  	    } else {
+  	      throw Error(validExtension.error);
+  	    }
+  	  }
+  	};
+
+  	/**
+  	 * Gets all extensions registered
+  	 * @returns {{}}
+  	 */
+  	showdown.getAllExtensions = function () {
+  	  return extensions;
+  	};
+
+  	/**
+  	 * Remove an extension
+  	 * @param {string} name
+  	 */
+  	showdown.removeExtension = function (name) {
+  	  delete extensions[name];
+  	};
+
+  	/**
+  	 * Removes all extensions
+  	 */
+  	showdown.resetExtensions = function () {
+  	  extensions = {};
+  	};
+
+  	/**
+  	 * Validate extension
+  	 * @param {array} extension
+  	 * @param {string} name
+  	 * @returns {{valid: boolean, error: string}}
+  	 */
+  	function validate (extension, name) {
+
+  	  var errMsg = (name) ? 'Error in ' + name + ' extension->' : 'Error in unnamed extension',
+  	      ret = {
+  	        valid: true,
+  	        error: ''
+  	      };
+
+  	  if (!showdown.helper.isArray(extension)) {
+  	    extension = [extension];
+  	  }
+
+  	  for (var i = 0; i < extension.length; ++i) {
+  	    var baseMsg = errMsg + ' sub-extension ' + i + ': ',
+  	        ext = extension[i];
+  	    if (typeof ext !== 'object') {
+  	      ret.valid = false;
+  	      ret.error = baseMsg + 'must be an object, but ' + typeof ext + ' given';
+  	      return ret;
+  	    }
+
+  	    if (!showdown.helper.isString(ext.type)) {
+  	      ret.valid = false;
+  	      ret.error = baseMsg + 'property "type" must be a string, but ' + typeof ext.type + ' given';
+  	      return ret;
+  	    }
+
+  	    var type = ext.type = ext.type.toLowerCase();
+
+  	    // normalize extension type
+  	    if (type === 'language') {
+  	      type = ext.type = 'lang';
+  	    }
+
+  	    if (type === 'html') {
+  	      type = ext.type = 'output';
+  	    }
+
+  	    if (type !== 'lang' && type !== 'output' && type !== 'listener') {
+  	      ret.valid = false;
+  	      ret.error = baseMsg + 'type ' + type + ' is not recognized. Valid values: "lang/language", "output/html" or "listener"';
+  	      return ret;
+  	    }
+
+  	    if (type === 'listener') {
+  	      if (showdown.helper.isUndefined(ext.listeners)) {
+  	        ret.valid = false;
+  	        ret.error = baseMsg + '. Extensions of type "listener" must have a property called "listeners"';
+  	        return ret;
+  	      }
+  	    } else {
+  	      if (showdown.helper.isUndefined(ext.filter) && showdown.helper.isUndefined(ext.regex)) {
+  	        ret.valid = false;
+  	        ret.error = baseMsg + type + ' extensions must define either a "regex" property or a "filter" method';
+  	        return ret;
+  	      }
+  	    }
+
+  	    if (ext.listeners) {
+  	      if (typeof ext.listeners !== 'object') {
+  	        ret.valid = false;
+  	        ret.error = baseMsg + '"listeners" property must be an object but ' + typeof ext.listeners + ' given';
+  	        return ret;
+  	      }
+  	      for (var ln in ext.listeners) {
+  	        if (ext.listeners.hasOwnProperty(ln)) {
+  	          if (typeof ext.listeners[ln] !== 'function') {
+  	            ret.valid = false;
+  	            ret.error = baseMsg + '"listeners" property must be an hash of [event name]: [callback]. listeners.' + ln +
+  	              ' must be a function but ' + typeof ext.listeners[ln] + ' given';
+  	            return ret;
+  	          }
+  	        }
+  	      }
+  	    }
+
+  	    if (ext.filter) {
+  	      if (typeof ext.filter !== 'function') {
+  	        ret.valid = false;
+  	        ret.error = baseMsg + '"filter" must be a function, but ' + typeof ext.filter + ' given';
+  	        return ret;
+  	      }
+  	    } else if (ext.regex) {
+  	      if (showdown.helper.isString(ext.regex)) {
+  	        ext.regex = new RegExp(ext.regex, 'g');
+  	      }
+  	      if (!(ext.regex instanceof RegExp)) {
+  	        ret.valid = false;
+  	        ret.error = baseMsg + '"regex" property must either be a string or a RegExp object, but ' + typeof ext.regex + ' given';
+  	        return ret;
+  	      }
+  	      if (showdown.helper.isUndefined(ext.replace)) {
+  	        ret.valid = false;
+  	        ret.error = baseMsg + '"regex" extensions must implement a replace string or function';
+  	        return ret;
+  	      }
+  	    }
+  	  }
+  	  return ret;
+  	}
+
+  	/**
+  	 * Validate extension
+  	 * @param {object} ext
+  	 * @returns {boolean}
+  	 */
+  	showdown.validateExtension = function (ext) {
+
+  	  var validateExtension = validate(ext, null);
+  	  if (!validateExtension.valid) {
+  	    console.warn(validateExtension.error);
+  	    return false;
+  	  }
+  	  return true;
+  	};
+
+  	/**
+  	 * showdownjs helper functions
+  	 */
+
+  	if (!showdown.hasOwnProperty('helper')) {
+  	  showdown.helper = {};
+  	}
+
+  	/**
+  	 * Check if var is string
+  	 * @static
+  	 * @param {string} a
+  	 * @returns {boolean}
+  	 */
+  	showdown.helper.isString = function (a) {
+  	  return (typeof a === 'string' || a instanceof String);
+  	};
+
+  	/**
+  	 * Check if var is a function
+  	 * @static
+  	 * @param {*} a
+  	 * @returns {boolean}
+  	 */
+  	showdown.helper.isFunction = function (a) {
+  	  var getType = {};
+  	  return a && getType.toString.call(a) === '[object Function]';
+  	};
+
+  	/**
+  	 * isArray helper function
+  	 * @static
+  	 * @param {*} a
+  	 * @returns {boolean}
+  	 */
+  	showdown.helper.isArray = function (a) {
+  	  return Array.isArray(a);
+  	};
+
+  	/**
+  	 * Check if value is undefined
+  	 * @static
+  	 * @param {*} value The value to check.
+  	 * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+  	 */
+  	showdown.helper.isUndefined = function (value) {
+  	  return typeof value === 'undefined';
+  	};
+
+  	/**
+  	 * ForEach helper function
+  	 * Iterates over Arrays and Objects (own properties only)
+  	 * @static
+  	 * @param {*} obj
+  	 * @param {function} callback Accepts 3 params: 1. value, 2. key, 3. the original array/object
+  	 */
+  	showdown.helper.forEach = function (obj, callback) {
+  	  // check if obj is defined
+  	  if (showdown.helper.isUndefined(obj)) {
+  	    throw new Error('obj param is required');
+  	  }
+
+  	  if (showdown.helper.isUndefined(callback)) {
+  	    throw new Error('callback param is required');
+  	  }
+
+  	  if (!showdown.helper.isFunction(callback)) {
+  	    throw new Error('callback param must be a function/closure');
+  	  }
+
+  	  if (typeof obj.forEach === 'function') {
+  	    obj.forEach(callback);
+  	  } else if (showdown.helper.isArray(obj)) {
+  	    for (var i = 0; i < obj.length; i++) {
+  	      callback(obj[i], i, obj);
+  	    }
+  	  } else if (typeof (obj) === 'object') {
+  	    for (var prop in obj) {
+  	      if (obj.hasOwnProperty(prop)) {
+  	        callback(obj[prop], prop, obj);
+  	      }
+  	    }
+  	  } else {
+  	    throw new Error('obj does not seem to be an array or an iterable object');
+  	  }
+  	};
+
+  	/**
+  	 * Standardidize extension name
+  	 * @static
+  	 * @param {string} s extension name
+  	 * @returns {string}
+  	 */
+  	showdown.helper.stdExtName = function (s) {
+  	  return s.replace(/[_?*+\/\\.^-]/g, '').replace(/\s/g, '').toLowerCase();
+  	};
+
+  	function escapeCharactersCallback (wholeMatch, m1) {
+  	  var charCodeToEscape = m1.charCodeAt(0);
+  	  return '¨E' + charCodeToEscape + 'E';
+  	}
+
+  	/**
+  	 * Callback used to escape characters when passing through String.replace
+  	 * @static
+  	 * @param {string} wholeMatch
+  	 * @param {string} m1
+  	 * @returns {string}
+  	 */
+  	showdown.helper.escapeCharactersCallback = escapeCharactersCallback;
+
+  	/**
+  	 * Escape characters in a string
+  	 * @static
+  	 * @param {string} text
+  	 * @param {string} charsToEscape
+  	 * @param {boolean} afterBackslash
+  	 * @returns {XML|string|void|*}
+  	 */
+  	showdown.helper.escapeCharacters = function (text, charsToEscape, afterBackslash) {
+  	  // First we have to escape the escape characters so that
+  	  // we can build a character class out of them
+  	  var regexString = '([' + charsToEscape.replace(/([\[\]\\])/g, '\\$1') + '])';
+
+  	  if (afterBackslash) {
+  	    regexString = '\\\\' + regexString;
+  	  }
+
+  	  var regex = new RegExp(regexString, 'g');
+  	  text = text.replace(regex, escapeCharactersCallback);
+
+  	  return text;
+  	};
+
+  	/**
+  	 * Unescape HTML entities
+  	 * @param txt
+  	 * @returns {string}
+  	 */
+  	showdown.helper.unescapeHTMLEntities = function (txt) {
+
+  	  return txt
+  	    .replace(/&quot;/g, '"')
+  	    .replace(/&lt;/g, '<')
+  	    .replace(/&gt;/g, '>')
+  	    .replace(/&amp;/g, '&');
+  	};
+
+  	var rgxFindMatchPos = function (str, left, right, flags) {
+  	  var f = flags || '',
+  	      g = f.indexOf('g') > -1,
+  	      x = new RegExp(left + '|' + right, 'g' + f.replace(/g/g, '')),
+  	      l = new RegExp(left, f.replace(/g/g, '')),
+  	      pos = [],
+  	      t, s, m, start, end;
+
+  	  do {
+  	    t = 0;
+  	    while ((m = x.exec(str))) {
+  	      if (l.test(m[0])) {
+  	        if (!(t++)) {
+  	          s = x.lastIndex;
+  	          start = s - m[0].length;
+  	        }
+  	      } else if (t) {
+  	        if (!--t) {
+  	          end = m.index + m[0].length;
+  	          var obj = {
+  	            left: {start: start, end: s},
+  	            match: {start: s, end: m.index},
+  	            right: {start: m.index, end: end},
+  	            wholeMatch: {start: start, end: end}
+  	          };
+  	          pos.push(obj);
+  	          if (!g) {
+  	            return pos;
+  	          }
+  	        }
+  	      }
+  	    }
+  	  } while (t && (x.lastIndex = s));
+
+  	  return pos;
+  	};
+
+  	/**
+  	 * matchRecursiveRegExp
+  	 *
+  	 * (c) 2007 Steven Levithan <stevenlevithan.com>
+  	 * MIT License
+  	 *
+  	 * Accepts a string to search, a left and right format delimiter
+  	 * as regex patterns, and optional regex flags. Returns an array
+  	 * of matches, allowing nested instances of left/right delimiters.
+  	 * Use the "g" flag to return all matches, otherwise only the
+  	 * first is returned. Be careful to ensure that the left and
+  	 * right format delimiters produce mutually exclusive matches.
+  	 * Backreferences are not supported within the right delimiter
+  	 * due to how it is internally combined with the left delimiter.
+  	 * When matching strings whose format delimiters are unbalanced
+  	 * to the left or right, the output is intentionally as a
+  	 * conventional regex library with recursion support would
+  	 * produce, e.g. "<<x>" and "<x>>" both produce ["x"] when using
+  	 * "<" and ">" as the delimiters (both strings contain a single,
+  	 * balanced instance of "<x>").
+  	 *
+  	 * examples:
+  	 * matchRecursiveRegExp("test", "\\(", "\\)")
+  	 * returns: []
+  	 * matchRecursiveRegExp("<t<<e>><s>>t<>", "<", ">", "g")
+  	 * returns: ["t<<e>><s>", ""]
+  	 * matchRecursiveRegExp("<div id=\"x\">test</div>", "<div\\b[^>]*>", "</div>", "gi")
+  	 * returns: ["test"]
+  	 */
+  	showdown.helper.matchRecursiveRegExp = function (str, left, right, flags) {
+
+  	  var matchPos = rgxFindMatchPos (str, left, right, flags),
+  	      results = [];
+
+  	  for (var i = 0; i < matchPos.length; ++i) {
+  	    results.push([
+  	      str.slice(matchPos[i].wholeMatch.start, matchPos[i].wholeMatch.end),
+  	      str.slice(matchPos[i].match.start, matchPos[i].match.end),
+  	      str.slice(matchPos[i].left.start, matchPos[i].left.end),
+  	      str.slice(matchPos[i].right.start, matchPos[i].right.end)
+  	    ]);
+  	  }
+  	  return results;
+  	};
+
+  	/**
+  	 *
+  	 * @param {string} str
+  	 * @param {string|function} replacement
+  	 * @param {string} left
+  	 * @param {string} right
+  	 * @param {string} flags
+  	 * @returns {string}
+  	 */
+  	showdown.helper.replaceRecursiveRegExp = function (str, replacement, left, right, flags) {
+
+  	  if (!showdown.helper.isFunction(replacement)) {
+  	    var repStr = replacement;
+  	    replacement = function () {
+  	      return repStr;
+  	    };
+  	  }
+
+  	  var matchPos = rgxFindMatchPos(str, left, right, flags),
+  	      finalStr = str,
+  	      lng = matchPos.length;
+
+  	  if (lng > 0) {
+  	    var bits = [];
+  	    if (matchPos[0].wholeMatch.start !== 0) {
+  	      bits.push(str.slice(0, matchPos[0].wholeMatch.start));
+  	    }
+  	    for (var i = 0; i < lng; ++i) {
+  	      bits.push(
+  	        replacement(
+  	          str.slice(matchPos[i].wholeMatch.start, matchPos[i].wholeMatch.end),
+  	          str.slice(matchPos[i].match.start, matchPos[i].match.end),
+  	          str.slice(matchPos[i].left.start, matchPos[i].left.end),
+  	          str.slice(matchPos[i].right.start, matchPos[i].right.end)
+  	        )
+  	      );
+  	      if (i < lng - 1) {
+  	        bits.push(str.slice(matchPos[i].wholeMatch.end, matchPos[i + 1].wholeMatch.start));
+  	      }
+  	    }
+  	    if (matchPos[lng - 1].wholeMatch.end < str.length) {
+  	      bits.push(str.slice(matchPos[lng - 1].wholeMatch.end));
+  	    }
+  	    finalStr = bits.join('');
+  	  }
+  	  return finalStr;
+  	};
+
+  	/**
+  	 * Returns the index within the passed String object of the first occurrence of the specified regex,
+  	 * starting the search at fromIndex. Returns -1 if the value is not found.
+  	 *
+  	 * @param {string} str string to search
+  	 * @param {RegExp} regex Regular expression to search
+  	 * @param {int} [fromIndex = 0] Index to start the search
+  	 * @returns {Number}
+  	 * @throws InvalidArgumentError
+  	 */
+  	showdown.helper.regexIndexOf = function (str, regex, fromIndex) {
+  	  if (!showdown.helper.isString(str)) {
+  	    throw 'InvalidArgumentError: first parameter of showdown.helper.regexIndexOf function must be a string';
+  	  }
+  	  if (regex instanceof RegExp === false) {
+  	    throw 'InvalidArgumentError: second parameter of showdown.helper.regexIndexOf function must be an instance of RegExp';
+  	  }
+  	  var indexOf = str.substring(fromIndex || 0).search(regex);
+  	  return (indexOf >= 0) ? (indexOf + (fromIndex || 0)) : indexOf;
+  	};
+
+  	/**
+  	 * Splits the passed string object at the defined index, and returns an array composed of the two substrings
+  	 * @param {string} str string to split
+  	 * @param {int} index index to split string at
+  	 * @returns {[string,string]}
+  	 * @throws InvalidArgumentError
+  	 */
+  	showdown.helper.splitAtIndex = function (str, index) {
+  	  if (!showdown.helper.isString(str)) {
+  	    throw 'InvalidArgumentError: first parameter of showdown.helper.regexIndexOf function must be a string';
+  	  }
+  	  return [str.substring(0, index), str.substring(index)];
+  	};
+
+  	/**
+  	 * Obfuscate an e-mail address through the use of Character Entities,
+  	 * transforming ASCII characters into their equivalent decimal or hex entities.
+  	 *
+  	 * Since it has a random component, subsequent calls to this function produce different results
+  	 *
+  	 * @param {string} mail
+  	 * @returns {string}
+  	 */
+  	showdown.helper.encodeEmailAddress = function (mail) {
+  	  var encode = [
+  	    function (ch) {
+  	      return '&#' + ch.charCodeAt(0) + ';';
+  	    },
+  	    function (ch) {
+  	      return '&#x' + ch.charCodeAt(0).toString(16) + ';';
+  	    },
+  	    function (ch) {
+  	      return ch;
+  	    }
+  	  ];
+
+  	  mail = mail.replace(/./g, function (ch) {
+  	    if (ch === '@') {
+  	      // this *must* be encoded. I insist.
+  	      ch = encode[Math.floor(Math.random() * 2)](ch);
+  	    } else {
+  	      var r = Math.random();
+  	      // roughly 10% raw, 45% hex, 45% dec
+  	      ch = (
+  	        r > 0.9 ? encode[2](ch) : r > 0.45 ? encode[1](ch) : encode[0](ch)
+  	      );
+  	    }
+  	    return ch;
+  	  });
+
+  	  return mail;
+  	};
+
+  	/**
+  	 *
+  	 * @param str
+  	 * @param targetLength
+  	 * @param padString
+  	 * @returns {string}
+  	 */
+  	showdown.helper.padEnd = function padEnd (str, targetLength, padString) {
+  	  /*jshint bitwise: false*/
+  	  // eslint-disable-next-line space-infix-ops
+  	  targetLength = targetLength>>0; //floor if number or convert non-number to 0;
+  	  /*jshint bitwise: true*/
+  	  padString = String(padString || ' ');
+  	  if (str.length > targetLength) {
+  	    return String(str);
+  	  } else {
+  	    targetLength = targetLength - str.length;
+  	    if (targetLength > padString.length) {
+  	      padString += padString.repeat(targetLength / padString.length); //append to original to ensure we are longer than needed
+  	    }
+  	    return String(str) + padString.slice(0,targetLength);
+  	  }
+  	};
+
+  	/**
+  	 * POLYFILLS
+  	 */
+  	// use this instead of builtin is undefined for IE8 compatibility
+  	if (typeof (console) === 'undefined') {
+  	  console = {
+  	    warn: function (msg) {
+  	      alert(msg);
+  	    },
+  	    log: function (msg) {
+  	      alert(msg);
+  	    },
+  	    error: function (msg) {
+  	      throw msg;
+  	    }
+  	  };
+  	}
+
+  	/**
+  	 * Common regexes.
+  	 * We declare some common regexes to improve performance
+  	 */
+  	showdown.helper.regexes = {
+  	  asteriskDashAndColon: /([*_:~])/g
+  	};
+
+  	/**
+  	 * EMOJIS LIST
+  	 */
+  	showdown.helper.emojis = {
+  	  '+1':'\ud83d\udc4d',
+  	  '-1':'\ud83d\udc4e',
+  	  '100':'\ud83d\udcaf',
+  	  '1234':'\ud83d\udd22',
+  	  '1st_place_medal':'\ud83e\udd47',
+  	  '2nd_place_medal':'\ud83e\udd48',
+  	  '3rd_place_medal':'\ud83e\udd49',
+  	  '8ball':'\ud83c\udfb1',
+  	  'a':'\ud83c\udd70\ufe0f',
+  	  'ab':'\ud83c\udd8e',
+  	  'abc':'\ud83d\udd24',
+  	  'abcd':'\ud83d\udd21',
+  	  'accept':'\ud83c\ude51',
+  	  'aerial_tramway':'\ud83d\udea1',
+  	  'airplane':'\u2708\ufe0f',
+  	  'alarm_clock':'\u23f0',
+  	  'alembic':'\u2697\ufe0f',
+  	  'alien':'\ud83d\udc7d',
+  	  'ambulance':'\ud83d\ude91',
+  	  'amphora':'\ud83c\udffa',
+  	  'anchor':'\u2693\ufe0f',
+  	  'angel':'\ud83d\udc7c',
+  	  'anger':'\ud83d\udca2',
+  	  'angry':'\ud83d\ude20',
+  	  'anguished':'\ud83d\ude27',
+  	  'ant':'\ud83d\udc1c',
+  	  'apple':'\ud83c\udf4e',
+  	  'aquarius':'\u2652\ufe0f',
+  	  'aries':'\u2648\ufe0f',
+  	  'arrow_backward':'\u25c0\ufe0f',
+  	  'arrow_double_down':'\u23ec',
+  	  'arrow_double_up':'\u23eb',
+  	  'arrow_down':'\u2b07\ufe0f',
+  	  'arrow_down_small':'\ud83d\udd3d',
+  	  'arrow_forward':'\u25b6\ufe0f',
+  	  'arrow_heading_down':'\u2935\ufe0f',
+  	  'arrow_heading_up':'\u2934\ufe0f',
+  	  'arrow_left':'\u2b05\ufe0f',
+  	  'arrow_lower_left':'\u2199\ufe0f',
+  	  'arrow_lower_right':'\u2198\ufe0f',
+  	  'arrow_right':'\u27a1\ufe0f',
+  	  'arrow_right_hook':'\u21aa\ufe0f',
+  	  'arrow_up':'\u2b06\ufe0f',
+  	  'arrow_up_down':'\u2195\ufe0f',
+  	  'arrow_up_small':'\ud83d\udd3c',
+  	  'arrow_upper_left':'\u2196\ufe0f',
+  	  'arrow_upper_right':'\u2197\ufe0f',
+  	  'arrows_clockwise':'\ud83d\udd03',
+  	  'arrows_counterclockwise':'\ud83d\udd04',
+  	  'art':'\ud83c\udfa8',
+  	  'articulated_lorry':'\ud83d\ude9b',
+  	  'artificial_satellite':'\ud83d\udef0',
+  	  'astonished':'\ud83d\ude32',
+  	  'athletic_shoe':'\ud83d\udc5f',
+  	  'atm':'\ud83c\udfe7',
+  	  'atom_symbol':'\u269b\ufe0f',
+  	  'avocado':'\ud83e\udd51',
+  	  'b':'\ud83c\udd71\ufe0f',
+  	  'baby':'\ud83d\udc76',
+  	  'baby_bottle':'\ud83c\udf7c',
+  	  'baby_chick':'\ud83d\udc24',
+  	  'baby_symbol':'\ud83d\udebc',
+  	  'back':'\ud83d\udd19',
+  	  'bacon':'\ud83e\udd53',
+  	  'badminton':'\ud83c\udff8',
+  	  'baggage_claim':'\ud83d\udec4',
+  	  'baguette_bread':'\ud83e\udd56',
+  	  'balance_scale':'\u2696\ufe0f',
+  	  'balloon':'\ud83c\udf88',
+  	  'ballot_box':'\ud83d\uddf3',
+  	  'ballot_box_with_check':'\u2611\ufe0f',
+  	  'bamboo':'\ud83c\udf8d',
+  	  'banana':'\ud83c\udf4c',
+  	  'bangbang':'\u203c\ufe0f',
+  	  'bank':'\ud83c\udfe6',
+  	  'bar_chart':'\ud83d\udcca',
+  	  'barber':'\ud83d\udc88',
+  	  'baseball':'\u26be\ufe0f',
+  	  'basketball':'\ud83c\udfc0',
+  	  'basketball_man':'\u26f9\ufe0f',
+  	  'basketball_woman':'\u26f9\ufe0f&zwj;\u2640\ufe0f',
+  	  'bat':'\ud83e\udd87',
+  	  'bath':'\ud83d\udec0',
+  	  'bathtub':'\ud83d\udec1',
+  	  'battery':'\ud83d\udd0b',
+  	  'beach_umbrella':'\ud83c\udfd6',
+  	  'bear':'\ud83d\udc3b',
+  	  'bed':'\ud83d\udecf',
+  	  'bee':'\ud83d\udc1d',
+  	  'beer':'\ud83c\udf7a',
+  	  'beers':'\ud83c\udf7b',
+  	  'beetle':'\ud83d\udc1e',
+  	  'beginner':'\ud83d\udd30',
+  	  'bell':'\ud83d\udd14',
+  	  'bellhop_bell':'\ud83d\udece',
+  	  'bento':'\ud83c\udf71',
+  	  'biking_man':'\ud83d\udeb4',
+  	  'bike':'\ud83d\udeb2',
+  	  'biking_woman':'\ud83d\udeb4&zwj;\u2640\ufe0f',
+  	  'bikini':'\ud83d\udc59',
+  	  'biohazard':'\u2623\ufe0f',
+  	  'bird':'\ud83d\udc26',
+  	  'birthday':'\ud83c\udf82',
+  	  'black_circle':'\u26ab\ufe0f',
+  	  'black_flag':'\ud83c\udff4',
+  	  'black_heart':'\ud83d\udda4',
+  	  'black_joker':'\ud83c\udccf',
+  	  'black_large_square':'\u2b1b\ufe0f',
+  	  'black_medium_small_square':'\u25fe\ufe0f',
+  	  'black_medium_square':'\u25fc\ufe0f',
+  	  'black_nib':'\u2712\ufe0f',
+  	  'black_small_square':'\u25aa\ufe0f',
+  	  'black_square_button':'\ud83d\udd32',
+  	  'blonde_man':'\ud83d\udc71',
+  	  'blonde_woman':'\ud83d\udc71&zwj;\u2640\ufe0f',
+  	  'blossom':'\ud83c\udf3c',
+  	  'blowfish':'\ud83d\udc21',
+  	  'blue_book':'\ud83d\udcd8',
+  	  'blue_car':'\ud83d\ude99',
+  	  'blue_heart':'\ud83d\udc99',
+  	  'blush':'\ud83d\ude0a',
+  	  'boar':'\ud83d\udc17',
+  	  'boat':'\u26f5\ufe0f',
+  	  'bomb':'\ud83d\udca3',
+  	  'book':'\ud83d\udcd6',
+  	  'bookmark':'\ud83d\udd16',
+  	  'bookmark_tabs':'\ud83d\udcd1',
+  	  'books':'\ud83d\udcda',
+  	  'boom':'\ud83d\udca5',
+  	  'boot':'\ud83d\udc62',
+  	  'bouquet':'\ud83d\udc90',
+  	  'bowing_man':'\ud83d\ude47',
+  	  'bow_and_arrow':'\ud83c\udff9',
+  	  'bowing_woman':'\ud83d\ude47&zwj;\u2640\ufe0f',
+  	  'bowling':'\ud83c\udfb3',
+  	  'boxing_glove':'\ud83e\udd4a',
+  	  'boy':'\ud83d\udc66',
+  	  'bread':'\ud83c\udf5e',
+  	  'bride_with_veil':'\ud83d\udc70',
+  	  'bridge_at_night':'\ud83c\udf09',
+  	  'briefcase':'\ud83d\udcbc',
+  	  'broken_heart':'\ud83d\udc94',
+  	  'bug':'\ud83d\udc1b',
+  	  'building_construction':'\ud83c\udfd7',
+  	  'bulb':'\ud83d\udca1',
+  	  'bullettrain_front':'\ud83d\ude85',
+  	  'bullettrain_side':'\ud83d\ude84',
+  	  'burrito':'\ud83c\udf2f',
+  	  'bus':'\ud83d\ude8c',
+  	  'business_suit_levitating':'\ud83d\udd74',
+  	  'busstop':'\ud83d\ude8f',
+  	  'bust_in_silhouette':'\ud83d\udc64',
+  	  'busts_in_silhouette':'\ud83d\udc65',
+  	  'butterfly':'\ud83e\udd8b',
+  	  'cactus':'\ud83c\udf35',
+  	  'cake':'\ud83c\udf70',
+  	  'calendar':'\ud83d\udcc6',
+  	  'call_me_hand':'\ud83e\udd19',
+  	  'calling':'\ud83d\udcf2',
+  	  'camel':'\ud83d\udc2b',
+  	  'camera':'\ud83d\udcf7',
+  	  'camera_flash':'\ud83d\udcf8',
+  	  'camping':'\ud83c\udfd5',
+  	  'cancer':'\u264b\ufe0f',
+  	  'candle':'\ud83d\udd6f',
+  	  'candy':'\ud83c\udf6c',
+  	  'canoe':'\ud83d\udef6',
+  	  'capital_abcd':'\ud83d\udd20',
+  	  'capricorn':'\u2651\ufe0f',
+  	  'car':'\ud83d\ude97',
+  	  'card_file_box':'\ud83d\uddc3',
+  	  'card_index':'\ud83d\udcc7',
+  	  'card_index_dividers':'\ud83d\uddc2',
+  	  'carousel_horse':'\ud83c\udfa0',
+  	  'carrot':'\ud83e\udd55',
+  	  'cat':'\ud83d\udc31',
+  	  'cat2':'\ud83d\udc08',
+  	  'cd':'\ud83d\udcbf',
+  	  'chains':'\u26d3',
+  	  'champagne':'\ud83c\udf7e',
+  	  'chart':'\ud83d\udcb9',
+  	  'chart_with_downwards_trend':'\ud83d\udcc9',
+  	  'chart_with_upwards_trend':'\ud83d\udcc8',
+  	  'checkered_flag':'\ud83c\udfc1',
+  	  'cheese':'\ud83e\uddc0',
+  	  'cherries':'\ud83c\udf52',
+  	  'cherry_blossom':'\ud83c\udf38',
+  	  'chestnut':'\ud83c\udf30',
+  	  'chicken':'\ud83d\udc14',
+  	  'children_crossing':'\ud83d\udeb8',
+  	  'chipmunk':'\ud83d\udc3f',
+  	  'chocolate_bar':'\ud83c\udf6b',
+  	  'christmas_tree':'\ud83c\udf84',
+  	  'church':'\u26ea\ufe0f',
+  	  'cinema':'\ud83c\udfa6',
+  	  'circus_tent':'\ud83c\udfaa',
+  	  'city_sunrise':'\ud83c\udf07',
+  	  'city_sunset':'\ud83c\udf06',
+  	  'cityscape':'\ud83c\udfd9',
+  	  'cl':'\ud83c\udd91',
+  	  'clamp':'\ud83d\udddc',
+  	  'clap':'\ud83d\udc4f',
+  	  'clapper':'\ud83c\udfac',
+  	  'classical_building':'\ud83c\udfdb',
+  	  'clinking_glasses':'\ud83e\udd42',
+  	  'clipboard':'\ud83d\udccb',
+  	  'clock1':'\ud83d\udd50',
+  	  'clock10':'\ud83d\udd59',
+  	  'clock1030':'\ud83d\udd65',
+  	  'clock11':'\ud83d\udd5a',
+  	  'clock1130':'\ud83d\udd66',
+  	  'clock12':'\ud83d\udd5b',
+  	  'clock1230':'\ud83d\udd67',
+  	  'clock130':'\ud83d\udd5c',
+  	  'clock2':'\ud83d\udd51',
+  	  'clock230':'\ud83d\udd5d',
+  	  'clock3':'\ud83d\udd52',
+  	  'clock330':'\ud83d\udd5e',
+  	  'clock4':'\ud83d\udd53',
+  	  'clock430':'\ud83d\udd5f',
+  	  'clock5':'\ud83d\udd54',
+  	  'clock530':'\ud83d\udd60',
+  	  'clock6':'\ud83d\udd55',
+  	  'clock630':'\ud83d\udd61',
+  	  'clock7':'\ud83d\udd56',
+  	  'clock730':'\ud83d\udd62',
+  	  'clock8':'\ud83d\udd57',
+  	  'clock830':'\ud83d\udd63',
+  	  'clock9':'\ud83d\udd58',
+  	  'clock930':'\ud83d\udd64',
+  	  'closed_book':'\ud83d\udcd5',
+  	  'closed_lock_with_key':'\ud83d\udd10',
+  	  'closed_umbrella':'\ud83c\udf02',
+  	  'cloud':'\u2601\ufe0f',
+  	  'cloud_with_lightning':'\ud83c\udf29',
+  	  'cloud_with_lightning_and_rain':'\u26c8',
+  	  'cloud_with_rain':'\ud83c\udf27',
+  	  'cloud_with_snow':'\ud83c\udf28',
+  	  'clown_face':'\ud83e\udd21',
+  	  'clubs':'\u2663\ufe0f',
+  	  'cocktail':'\ud83c\udf78',
+  	  'coffee':'\u2615\ufe0f',
+  	  'coffin':'\u26b0\ufe0f',
+  	  'cold_sweat':'\ud83d\ude30',
+  	  'comet':'\u2604\ufe0f',
+  	  'computer':'\ud83d\udcbb',
+  	  'computer_mouse':'\ud83d\uddb1',
+  	  'confetti_ball':'\ud83c\udf8a',
+  	  'confounded':'\ud83d\ude16',
+  	  'confused':'\ud83d\ude15',
+  	  'congratulations':'\u3297\ufe0f',
+  	  'construction':'\ud83d\udea7',
+  	  'construction_worker_man':'\ud83d\udc77',
+  	  'construction_worker_woman':'\ud83d\udc77&zwj;\u2640\ufe0f',
+  	  'control_knobs':'\ud83c\udf9b',
+  	  'convenience_store':'\ud83c\udfea',
+  	  'cookie':'\ud83c\udf6a',
+  	  'cool':'\ud83c\udd92',
+  	  'policeman':'\ud83d\udc6e',
+  	  'copyright':'\u00a9\ufe0f',
+  	  'corn':'\ud83c\udf3d',
+  	  'couch_and_lamp':'\ud83d\udecb',
+  	  'couple':'\ud83d\udc6b',
+  	  'couple_with_heart_woman_man':'\ud83d\udc91',
+  	  'couple_with_heart_man_man':'\ud83d\udc68&zwj;\u2764\ufe0f&zwj;\ud83d\udc68',
+  	  'couple_with_heart_woman_woman':'\ud83d\udc69&zwj;\u2764\ufe0f&zwj;\ud83d\udc69',
+  	  'couplekiss_man_man':'\ud83d\udc68&zwj;\u2764\ufe0f&zwj;\ud83d\udc8b&zwj;\ud83d\udc68',
+  	  'couplekiss_man_woman':'\ud83d\udc8f',
+  	  'couplekiss_woman_woman':'\ud83d\udc69&zwj;\u2764\ufe0f&zwj;\ud83d\udc8b&zwj;\ud83d\udc69',
+  	  'cow':'\ud83d\udc2e',
+  	  'cow2':'\ud83d\udc04',
+  	  'cowboy_hat_face':'\ud83e\udd20',
+  	  'crab':'\ud83e\udd80',
+  	  'crayon':'\ud83d\udd8d',
+  	  'credit_card':'\ud83d\udcb3',
+  	  'crescent_moon':'\ud83c\udf19',
+  	  'cricket':'\ud83c\udfcf',
+  	  'crocodile':'\ud83d\udc0a',
+  	  'croissant':'\ud83e\udd50',
+  	  'crossed_fingers':'\ud83e\udd1e',
+  	  'crossed_flags':'\ud83c\udf8c',
+  	  'crossed_swords':'\u2694\ufe0f',
+  	  'crown':'\ud83d\udc51',
+  	  'cry':'\ud83d\ude22',
+  	  'crying_cat_face':'\ud83d\ude3f',
+  	  'crystal_ball':'\ud83d\udd2e',
+  	  'cucumber':'\ud83e\udd52',
+  	  'cupid':'\ud83d\udc98',
+  	  'curly_loop':'\u27b0',
+  	  'currency_exchange':'\ud83d\udcb1',
+  	  'curry':'\ud83c\udf5b',
+  	  'custard':'\ud83c\udf6e',
+  	  'customs':'\ud83d\udec3',
+  	  'cyclone':'\ud83c\udf00',
+  	  'dagger':'\ud83d\udde1',
+  	  'dancer':'\ud83d\udc83',
+  	  'dancing_women':'\ud83d\udc6f',
+  	  'dancing_men':'\ud83d\udc6f&zwj;\u2642\ufe0f',
+  	  'dango':'\ud83c\udf61',
+  	  'dark_sunglasses':'\ud83d\udd76',
+  	  'dart':'\ud83c\udfaf',
+  	  'dash':'\ud83d\udca8',
+  	  'date':'\ud83d\udcc5',
+  	  'deciduous_tree':'\ud83c\udf33',
+  	  'deer':'\ud83e\udd8c',
+  	  'department_store':'\ud83c\udfec',
+  	  'derelict_house':'\ud83c\udfda',
+  	  'desert':'\ud83c\udfdc',
+  	  'desert_island':'\ud83c\udfdd',
+  	  'desktop_computer':'\ud83d\udda5',
+  	  'male_detective':'\ud83d\udd75\ufe0f',
+  	  'diamond_shape_with_a_dot_inside':'\ud83d\udca0',
+  	  'diamonds':'\u2666\ufe0f',
+  	  'disappointed':'\ud83d\ude1e',
+  	  'disappointed_relieved':'\ud83d\ude25',
+  	  'dizzy':'\ud83d\udcab',
+  	  'dizzy_face':'\ud83d\ude35',
+  	  'do_not_litter':'\ud83d\udeaf',
+  	  'dog':'\ud83d\udc36',
+  	  'dog2':'\ud83d\udc15',
+  	  'dollar':'\ud83d\udcb5',
+  	  'dolls':'\ud83c\udf8e',
+  	  'dolphin':'\ud83d\udc2c',
+  	  'door':'\ud83d\udeaa',
+  	  'doughnut':'\ud83c\udf69',
+  	  'dove':'\ud83d\udd4a',
+  	  'dragon':'\ud83d\udc09',
+  	  'dragon_face':'\ud83d\udc32',
+  	  'dress':'\ud83d\udc57',
+  	  'dromedary_camel':'\ud83d\udc2a',
+  	  'drooling_face':'\ud83e\udd24',
+  	  'droplet':'\ud83d\udca7',
+  	  'drum':'\ud83e\udd41',
+  	  'duck':'\ud83e\udd86',
+  	  'dvd':'\ud83d\udcc0',
+  	  'e-mail':'\ud83d\udce7',
+  	  'eagle':'\ud83e\udd85',
+  	  'ear':'\ud83d\udc42',
+  	  'ear_of_rice':'\ud83c\udf3e',
+  	  'earth_africa':'\ud83c\udf0d',
+  	  'earth_americas':'\ud83c\udf0e',
+  	  'earth_asia':'\ud83c\udf0f',
+  	  'egg':'\ud83e\udd5a',
+  	  'eggplant':'\ud83c\udf46',
+  	  'eight_pointed_black_star':'\u2734\ufe0f',
+  	  'eight_spoked_asterisk':'\u2733\ufe0f',
+  	  'electric_plug':'\ud83d\udd0c',
+  	  'elephant':'\ud83d\udc18',
+  	  'email':'\u2709\ufe0f',
+  	  'end':'\ud83d\udd1a',
+  	  'envelope_with_arrow':'\ud83d\udce9',
+  	  'euro':'\ud83d\udcb6',
+  	  'european_castle':'\ud83c\udff0',
+  	  'european_post_office':'\ud83c\udfe4',
+  	  'evergreen_tree':'\ud83c\udf32',
+  	  'exclamation':'\u2757\ufe0f',
+  	  'expressionless':'\ud83d\ude11',
+  	  'eye':'\ud83d\udc41',
+  	  'eye_speech_bubble':'\ud83d\udc41&zwj;\ud83d\udde8',
+  	  'eyeglasses':'\ud83d\udc53',
+  	  'eyes':'\ud83d\udc40',
+  	  'face_with_head_bandage':'\ud83e\udd15',
+  	  'face_with_thermometer':'\ud83e\udd12',
+  	  'fist_oncoming':'\ud83d\udc4a',
+  	  'factory':'\ud83c\udfed',
+  	  'fallen_leaf':'\ud83c\udf42',
+  	  'family_man_woman_boy':'\ud83d\udc6a',
+  	  'family_man_boy':'\ud83d\udc68&zwj;\ud83d\udc66',
+  	  'family_man_boy_boy':'\ud83d\udc68&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
+  	  'family_man_girl':'\ud83d\udc68&zwj;\ud83d\udc67',
+  	  'family_man_girl_boy':'\ud83d\udc68&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
+  	  'family_man_girl_girl':'\ud83d\udc68&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
+  	  'family_man_man_boy':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc66',
+  	  'family_man_man_boy_boy':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
+  	  'family_man_man_girl':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc67',
+  	  'family_man_man_girl_boy':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
+  	  'family_man_man_girl_girl':'\ud83d\udc68&zwj;\ud83d\udc68&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
+  	  'family_man_woman_boy_boy':'\ud83d\udc68&zwj;\ud83d\udc69&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
+  	  'family_man_woman_girl':'\ud83d\udc68&zwj;\ud83d\udc69&zwj;\ud83d\udc67',
+  	  'family_man_woman_girl_boy':'\ud83d\udc68&zwj;\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
+  	  'family_man_woman_girl_girl':'\ud83d\udc68&zwj;\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
+  	  'family_woman_boy':'\ud83d\udc69&zwj;\ud83d\udc66',
+  	  'family_woman_boy_boy':'\ud83d\udc69&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
+  	  'family_woman_girl':'\ud83d\udc69&zwj;\ud83d\udc67',
+  	  'family_woman_girl_boy':'\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
+  	  'family_woman_girl_girl':'\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
+  	  'family_woman_woman_boy':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc66',
+  	  'family_woman_woman_boy_boy':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc66&zwj;\ud83d\udc66',
+  	  'family_woman_woman_girl':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc67',
+  	  'family_woman_woman_girl_boy':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc66',
+  	  'family_woman_woman_girl_girl':'\ud83d\udc69&zwj;\ud83d\udc69&zwj;\ud83d\udc67&zwj;\ud83d\udc67',
+  	  'fast_forward':'\u23e9',
+  	  'fax':'\ud83d\udce0',
+  	  'fearful':'\ud83d\ude28',
+  	  'feet':'\ud83d\udc3e',
+  	  'female_detective':'\ud83d\udd75\ufe0f&zwj;\u2640\ufe0f',
+  	  'ferris_wheel':'\ud83c\udfa1',
+  	  'ferry':'\u26f4',
+  	  'field_hockey':'\ud83c\udfd1',
+  	  'file_cabinet':'\ud83d\uddc4',
+  	  'file_folder':'\ud83d\udcc1',
+  	  'film_projector':'\ud83d\udcfd',
+  	  'film_strip':'\ud83c\udf9e',
+  	  'fire':'\ud83d\udd25',
+  	  'fire_engine':'\ud83d\ude92',
+  	  'fireworks':'\ud83c\udf86',
+  	  'first_quarter_moon':'\ud83c\udf13',
+  	  'first_quarter_moon_with_face':'\ud83c\udf1b',
+  	  'fish':'\ud83d\udc1f',
+  	  'fish_cake':'\ud83c\udf65',
+  	  'fishing_pole_and_fish':'\ud83c\udfa3',
+  	  'fist_raised':'\u270a',
+  	  'fist_left':'\ud83e\udd1b',
+  	  'fist_right':'\ud83e\udd1c',
+  	  'flags':'\ud83c\udf8f',
+  	  'flashlight':'\ud83d\udd26',
+  	  'fleur_de_lis':'\u269c\ufe0f',
+  	  'flight_arrival':'\ud83d\udeec',
+  	  'flight_departure':'\ud83d\udeeb',
+  	  'floppy_disk':'\ud83d\udcbe',
+  	  'flower_playing_cards':'\ud83c\udfb4',
+  	  'flushed':'\ud83d\ude33',
+  	  'fog':'\ud83c\udf2b',
+  	  'foggy':'\ud83c\udf01',
+  	  'football':'\ud83c\udfc8',
+  	  'footprints':'\ud83d\udc63',
+  	  'fork_and_knife':'\ud83c\udf74',
+  	  'fountain':'\u26f2\ufe0f',
+  	  'fountain_pen':'\ud83d\udd8b',
+  	  'four_leaf_clover':'\ud83c\udf40',
+  	  'fox_face':'\ud83e\udd8a',
+  	  'framed_picture':'\ud83d\uddbc',
+  	  'free':'\ud83c\udd93',
+  	  'fried_egg':'\ud83c\udf73',
+  	  'fried_shrimp':'\ud83c\udf64',
+  	  'fries':'\ud83c\udf5f',
+  	  'frog':'\ud83d\udc38',
+  	  'frowning':'\ud83d\ude26',
+  	  'frowning_face':'\u2639\ufe0f',
+  	  'frowning_man':'\ud83d\ude4d&zwj;\u2642\ufe0f',
+  	  'frowning_woman':'\ud83d\ude4d',
+  	  'middle_finger':'\ud83d\udd95',
+  	  'fuelpump':'\u26fd\ufe0f',
+  	  'full_moon':'\ud83c\udf15',
+  	  'full_moon_with_face':'\ud83c\udf1d',
+  	  'funeral_urn':'\u26b1\ufe0f',
+  	  'game_die':'\ud83c\udfb2',
+  	  'gear':'\u2699\ufe0f',
+  	  'gem':'\ud83d\udc8e',
+  	  'gemini':'\u264a\ufe0f',
+  	  'ghost':'\ud83d\udc7b',
+  	  'gift':'\ud83c\udf81',
+  	  'gift_heart':'\ud83d\udc9d',
+  	  'girl':'\ud83d\udc67',
+  	  'globe_with_meridians':'\ud83c\udf10',
+  	  'goal_net':'\ud83e\udd45',
+  	  'goat':'\ud83d\udc10',
+  	  'golf':'\u26f3\ufe0f',
+  	  'golfing_man':'\ud83c\udfcc\ufe0f',
+  	  'golfing_woman':'\ud83c\udfcc\ufe0f&zwj;\u2640\ufe0f',
+  	  'gorilla':'\ud83e\udd8d',
+  	  'grapes':'\ud83c\udf47',
+  	  'green_apple':'\ud83c\udf4f',
+  	  'green_book':'\ud83d\udcd7',
+  	  'green_heart':'\ud83d\udc9a',
+  	  'green_salad':'\ud83e\udd57',
+  	  'grey_exclamation':'\u2755',
+  	  'grey_question':'\u2754',
+  	  'grimacing':'\ud83d\ude2c',
+  	  'grin':'\ud83d\ude01',
+  	  'grinning':'\ud83d\ude00',
+  	  'guardsman':'\ud83d\udc82',
+  	  'guardswoman':'\ud83d\udc82&zwj;\u2640\ufe0f',
+  	  'guitar':'\ud83c\udfb8',
+  	  'gun':'\ud83d\udd2b',
+  	  'haircut_woman':'\ud83d\udc87',
+  	  'haircut_man':'\ud83d\udc87&zwj;\u2642\ufe0f',
+  	  'hamburger':'\ud83c\udf54',
+  	  'hammer':'\ud83d\udd28',
+  	  'hammer_and_pick':'\u2692',
+  	  'hammer_and_wrench':'\ud83d\udee0',
+  	  'hamster':'\ud83d\udc39',
+  	  'hand':'\u270b',
+  	  'handbag':'\ud83d\udc5c',
+  	  'handshake':'\ud83e\udd1d',
+  	  'hankey':'\ud83d\udca9',
+  	  'hatched_chick':'\ud83d\udc25',
+  	  'hatching_chick':'\ud83d\udc23',
+  	  'headphones':'\ud83c\udfa7',
+  	  'hear_no_evil':'\ud83d\ude49',
+  	  'heart':'\u2764\ufe0f',
+  	  'heart_decoration':'\ud83d\udc9f',
+  	  'heart_eyes':'\ud83d\ude0d',
+  	  'heart_eyes_cat':'\ud83d\ude3b',
+  	  'heartbeat':'\ud83d\udc93',
+  	  'heartpulse':'\ud83d\udc97',
+  	  'hearts':'\u2665\ufe0f',
+  	  'heavy_check_mark':'\u2714\ufe0f',
+  	  'heavy_division_sign':'\u2797',
+  	  'heavy_dollar_sign':'\ud83d\udcb2',
+  	  'heavy_heart_exclamation':'\u2763\ufe0f',
+  	  'heavy_minus_sign':'\u2796',
+  	  'heavy_multiplication_x':'\u2716\ufe0f',
+  	  'heavy_plus_sign':'\u2795',
+  	  'helicopter':'\ud83d\ude81',
+  	  'herb':'\ud83c\udf3f',
+  	  'hibiscus':'\ud83c\udf3a',
+  	  'high_brightness':'\ud83d\udd06',
+  	  'high_heel':'\ud83d\udc60',
+  	  'hocho':'\ud83d\udd2a',
+  	  'hole':'\ud83d\udd73',
+  	  'honey_pot':'\ud83c\udf6f',
+  	  'horse':'\ud83d\udc34',
+  	  'horse_racing':'\ud83c\udfc7',
+  	  'hospital':'\ud83c\udfe5',
+  	  'hot_pepper':'\ud83c\udf36',
+  	  'hotdog':'\ud83c\udf2d',
+  	  'hotel':'\ud83c\udfe8',
+  	  'hotsprings':'\u2668\ufe0f',
+  	  'hourglass':'\u231b\ufe0f',
+  	  'hourglass_flowing_sand':'\u23f3',
+  	  'house':'\ud83c\udfe0',
+  	  'house_with_garden':'\ud83c\udfe1',
+  	  'houses':'\ud83c\udfd8',
+  	  'hugs':'\ud83e\udd17',
+  	  'hushed':'\ud83d\ude2f',
+  	  'ice_cream':'\ud83c\udf68',
+  	  'ice_hockey':'\ud83c\udfd2',
+  	  'ice_skate':'\u26f8',
+  	  'icecream':'\ud83c\udf66',
+  	  'id':'\ud83c\udd94',
+  	  'ideograph_advantage':'\ud83c\ude50',
+  	  'imp':'\ud83d\udc7f',
+  	  'inbox_tray':'\ud83d\udce5',
+  	  'incoming_envelope':'\ud83d\udce8',
+  	  'tipping_hand_woman':'\ud83d\udc81',
+  	  'information_source':'\u2139\ufe0f',
+  	  'innocent':'\ud83d\ude07',
+  	  'interrobang':'\u2049\ufe0f',
+  	  'iphone':'\ud83d\udcf1',
+  	  'izakaya_lantern':'\ud83c\udfee',
+  	  'jack_o_lantern':'\ud83c\udf83',
+  	  'japan':'\ud83d\uddfe',
+  	  'japanese_castle':'\ud83c\udfef',
+  	  'japanese_goblin':'\ud83d\udc7a',
+  	  'japanese_ogre':'\ud83d\udc79',
+  	  'jeans':'\ud83d\udc56',
+  	  'joy':'\ud83d\ude02',
+  	  'joy_cat':'\ud83d\ude39',
+  	  'joystick':'\ud83d\udd79',
+  	  'kaaba':'\ud83d\udd4b',
+  	  'key':'\ud83d\udd11',
+  	  'keyboard':'\u2328\ufe0f',
+  	  'keycap_ten':'\ud83d\udd1f',
+  	  'kick_scooter':'\ud83d\udef4',
+  	  'kimono':'\ud83d\udc58',
+  	  'kiss':'\ud83d\udc8b',
+  	  'kissing':'\ud83d\ude17',
+  	  'kissing_cat':'\ud83d\ude3d',
+  	  'kissing_closed_eyes':'\ud83d\ude1a',
+  	  'kissing_heart':'\ud83d\ude18',
+  	  'kissing_smiling_eyes':'\ud83d\ude19',
+  	  'kiwi_fruit':'\ud83e\udd5d',
+  	  'koala':'\ud83d\udc28',
+  	  'koko':'\ud83c\ude01',
+  	  'label':'\ud83c\udff7',
+  	  'large_blue_circle':'\ud83d\udd35',
+  	  'large_blue_diamond':'\ud83d\udd37',
+  	  'large_orange_diamond':'\ud83d\udd36',
+  	  'last_quarter_moon':'\ud83c\udf17',
+  	  'last_quarter_moon_with_face':'\ud83c\udf1c',
+  	  'latin_cross':'\u271d\ufe0f',
+  	  'laughing':'\ud83d\ude06',
+  	  'leaves':'\ud83c\udf43',
+  	  'ledger':'\ud83d\udcd2',
+  	  'left_luggage':'\ud83d\udec5',
+  	  'left_right_arrow':'\u2194\ufe0f',
+  	  'leftwards_arrow_with_hook':'\u21a9\ufe0f',
+  	  'lemon':'\ud83c\udf4b',
+  	  'leo':'\u264c\ufe0f',
+  	  'leopard':'\ud83d\udc06',
+  	  'level_slider':'\ud83c\udf9a',
+  	  'libra':'\u264e\ufe0f',
+  	  'light_rail':'\ud83d\ude88',
+  	  'link':'\ud83d\udd17',
+  	  'lion':'\ud83e\udd81',
+  	  'lips':'\ud83d\udc44',
+  	  'lipstick':'\ud83d\udc84',
+  	  'lizard':'\ud83e\udd8e',
+  	  'lock':'\ud83d\udd12',
+  	  'lock_with_ink_pen':'\ud83d\udd0f',
+  	  'lollipop':'\ud83c\udf6d',
+  	  'loop':'\u27bf',
+  	  'loud_sound':'\ud83d\udd0a',
+  	  'loudspeaker':'\ud83d\udce2',
+  	  'love_hotel':'\ud83c\udfe9',
+  	  'love_letter':'\ud83d\udc8c',
+  	  'low_brightness':'\ud83d\udd05',
+  	  'lying_face':'\ud83e\udd25',
+  	  'm':'\u24c2\ufe0f',
+  	  'mag':'\ud83d\udd0d',
+  	  'mag_right':'\ud83d\udd0e',
+  	  'mahjong':'\ud83c\udc04\ufe0f',
+  	  'mailbox':'\ud83d\udceb',
+  	  'mailbox_closed':'\ud83d\udcea',
+  	  'mailbox_with_mail':'\ud83d\udcec',
+  	  'mailbox_with_no_mail':'\ud83d\udced',
+  	  'man':'\ud83d\udc68',
+  	  'man_artist':'\ud83d\udc68&zwj;\ud83c\udfa8',
+  	  'man_astronaut':'\ud83d\udc68&zwj;\ud83d\ude80',
+  	  'man_cartwheeling':'\ud83e\udd38&zwj;\u2642\ufe0f',
+  	  'man_cook':'\ud83d\udc68&zwj;\ud83c\udf73',
+  	  'man_dancing':'\ud83d\udd7a',
+  	  'man_facepalming':'\ud83e\udd26&zwj;\u2642\ufe0f',
+  	  'man_factory_worker':'\ud83d\udc68&zwj;\ud83c\udfed',
+  	  'man_farmer':'\ud83d\udc68&zwj;\ud83c\udf3e',
+  	  'man_firefighter':'\ud83d\udc68&zwj;\ud83d\ude92',
+  	  'man_health_worker':'\ud83d\udc68&zwj;\u2695\ufe0f',
+  	  'man_in_tuxedo':'\ud83e\udd35',
+  	  'man_judge':'\ud83d\udc68&zwj;\u2696\ufe0f',
+  	  'man_juggling':'\ud83e\udd39&zwj;\u2642\ufe0f',
+  	  'man_mechanic':'\ud83d\udc68&zwj;\ud83d\udd27',
+  	  'man_office_worker':'\ud83d\udc68&zwj;\ud83d\udcbc',
+  	  'man_pilot':'\ud83d\udc68&zwj;\u2708\ufe0f',
+  	  'man_playing_handball':'\ud83e\udd3e&zwj;\u2642\ufe0f',
+  	  'man_playing_water_polo':'\ud83e\udd3d&zwj;\u2642\ufe0f',
+  	  'man_scientist':'\ud83d\udc68&zwj;\ud83d\udd2c',
+  	  'man_shrugging':'\ud83e\udd37&zwj;\u2642\ufe0f',
+  	  'man_singer':'\ud83d\udc68&zwj;\ud83c\udfa4',
+  	  'man_student':'\ud83d\udc68&zwj;\ud83c\udf93',
+  	  'man_teacher':'\ud83d\udc68&zwj;\ud83c\udfeb',
+  	  'man_technologist':'\ud83d\udc68&zwj;\ud83d\udcbb',
+  	  'man_with_gua_pi_mao':'\ud83d\udc72',
+  	  'man_with_turban':'\ud83d\udc73',
+  	  'tangerine':'\ud83c\udf4a',
+  	  'mans_shoe':'\ud83d\udc5e',
+  	  'mantelpiece_clock':'\ud83d\udd70',
+  	  'maple_leaf':'\ud83c\udf41',
+  	  'martial_arts_uniform':'\ud83e\udd4b',
+  	  'mask':'\ud83d\ude37',
+  	  'massage_woman':'\ud83d\udc86',
+  	  'massage_man':'\ud83d\udc86&zwj;\u2642\ufe0f',
+  	  'meat_on_bone':'\ud83c\udf56',
+  	  'medal_military':'\ud83c\udf96',
+  	  'medal_sports':'\ud83c\udfc5',
+  	  'mega':'\ud83d\udce3',
+  	  'melon':'\ud83c\udf48',
+  	  'memo':'\ud83d\udcdd',
+  	  'men_wrestling':'\ud83e\udd3c&zwj;\u2642\ufe0f',
+  	  'menorah':'\ud83d\udd4e',
+  	  'mens':'\ud83d\udeb9',
+  	  'metal':'\ud83e\udd18',
+  	  'metro':'\ud83d\ude87',
+  	  'microphone':'\ud83c\udfa4',
+  	  'microscope':'\ud83d\udd2c',
+  	  'milk_glass':'\ud83e\udd5b',
+  	  'milky_way':'\ud83c\udf0c',
+  	  'minibus':'\ud83d\ude90',
+  	  'minidisc':'\ud83d\udcbd',
+  	  'mobile_phone_off':'\ud83d\udcf4',
+  	  'money_mouth_face':'\ud83e\udd11',
+  	  'money_with_wings':'\ud83d\udcb8',
+  	  'moneybag':'\ud83d\udcb0',
+  	  'monkey':'\ud83d\udc12',
+  	  'monkey_face':'\ud83d\udc35',
+  	  'monorail':'\ud83d\ude9d',
+  	  'moon':'\ud83c\udf14',
+  	  'mortar_board':'\ud83c\udf93',
+  	  'mosque':'\ud83d\udd4c',
+  	  'motor_boat':'\ud83d\udee5',
+  	  'motor_scooter':'\ud83d\udef5',
+  	  'motorcycle':'\ud83c\udfcd',
+  	  'motorway':'\ud83d\udee3',
+  	  'mount_fuji':'\ud83d\uddfb',
+  	  'mountain':'\u26f0',
+  	  'mountain_biking_man':'\ud83d\udeb5',
+  	  'mountain_biking_woman':'\ud83d\udeb5&zwj;\u2640\ufe0f',
+  	  'mountain_cableway':'\ud83d\udea0',
+  	  'mountain_railway':'\ud83d\ude9e',
+  	  'mountain_snow':'\ud83c\udfd4',
+  	  'mouse':'\ud83d\udc2d',
+  	  'mouse2':'\ud83d\udc01',
+  	  'movie_camera':'\ud83c\udfa5',
+  	  'moyai':'\ud83d\uddff',
+  	  'mrs_claus':'\ud83e\udd36',
+  	  'muscle':'\ud83d\udcaa',
+  	  'mushroom':'\ud83c\udf44',
+  	  'musical_keyboard':'\ud83c\udfb9',
+  	  'musical_note':'\ud83c\udfb5',
+  	  'musical_score':'\ud83c\udfbc',
+  	  'mute':'\ud83d\udd07',
+  	  'nail_care':'\ud83d\udc85',
+  	  'name_badge':'\ud83d\udcdb',
+  	  'national_park':'\ud83c\udfde',
+  	  'nauseated_face':'\ud83e\udd22',
+  	  'necktie':'\ud83d\udc54',
+  	  'negative_squared_cross_mark':'\u274e',
+  	  'nerd_face':'\ud83e\udd13',
+  	  'neutral_face':'\ud83d\ude10',
+  	  'new':'\ud83c\udd95',
+  	  'new_moon':'\ud83c\udf11',
+  	  'new_moon_with_face':'\ud83c\udf1a',
+  	  'newspaper':'\ud83d\udcf0',
+  	  'newspaper_roll':'\ud83d\uddde',
+  	  'next_track_button':'\u23ed',
+  	  'ng':'\ud83c\udd96',
+  	  'no_good_man':'\ud83d\ude45&zwj;\u2642\ufe0f',
+  	  'no_good_woman':'\ud83d\ude45',
+  	  'night_with_stars':'\ud83c\udf03',
+  	  'no_bell':'\ud83d\udd15',
+  	  'no_bicycles':'\ud83d\udeb3',
+  	  'no_entry':'\u26d4\ufe0f',
+  	  'no_entry_sign':'\ud83d\udeab',
+  	  'no_mobile_phones':'\ud83d\udcf5',
+  	  'no_mouth':'\ud83d\ude36',
+  	  'no_pedestrians':'\ud83d\udeb7',
+  	  'no_smoking':'\ud83d\udead',
+  	  'non-potable_water':'\ud83d\udeb1',
+  	  'nose':'\ud83d\udc43',
+  	  'notebook':'\ud83d\udcd3',
+  	  'notebook_with_decorative_cover':'\ud83d\udcd4',
+  	  'notes':'\ud83c\udfb6',
+  	  'nut_and_bolt':'\ud83d\udd29',
+  	  'o':'\u2b55\ufe0f',
+  	  'o2':'\ud83c\udd7e\ufe0f',
+  	  'ocean':'\ud83c\udf0a',
+  	  'octopus':'\ud83d\udc19',
+  	  'oden':'\ud83c\udf62',
+  	  'office':'\ud83c\udfe2',
+  	  'oil_drum':'\ud83d\udee2',
+  	  'ok':'\ud83c\udd97',
+  	  'ok_hand':'\ud83d\udc4c',
+  	  'ok_man':'\ud83d\ude46&zwj;\u2642\ufe0f',
+  	  'ok_woman':'\ud83d\ude46',
+  	  'old_key':'\ud83d\udddd',
+  	  'older_man':'\ud83d\udc74',
+  	  'older_woman':'\ud83d\udc75',
+  	  'om':'\ud83d\udd49',
+  	  'on':'\ud83d\udd1b',
+  	  'oncoming_automobile':'\ud83d\ude98',
+  	  'oncoming_bus':'\ud83d\ude8d',
+  	  'oncoming_police_car':'\ud83d\ude94',
+  	  'oncoming_taxi':'\ud83d\ude96',
+  	  'open_file_folder':'\ud83d\udcc2',
+  	  'open_hands':'\ud83d\udc50',
+  	  'open_mouth':'\ud83d\ude2e',
+  	  'open_umbrella':'\u2602\ufe0f',
+  	  'ophiuchus':'\u26ce',
+  	  'orange_book':'\ud83d\udcd9',
+  	  'orthodox_cross':'\u2626\ufe0f',
+  	  'outbox_tray':'\ud83d\udce4',
+  	  'owl':'\ud83e\udd89',
+  	  'ox':'\ud83d\udc02',
+  	  'package':'\ud83d\udce6',
+  	  'page_facing_up':'\ud83d\udcc4',
+  	  'page_with_curl':'\ud83d\udcc3',
+  	  'pager':'\ud83d\udcdf',
+  	  'paintbrush':'\ud83d\udd8c',
+  	  'palm_tree':'\ud83c\udf34',
+  	  'pancakes':'\ud83e\udd5e',
+  	  'panda_face':'\ud83d\udc3c',
+  	  'paperclip':'\ud83d\udcce',
+  	  'paperclips':'\ud83d\udd87',
+  	  'parasol_on_ground':'\u26f1',
+  	  'parking':'\ud83c\udd7f\ufe0f',
+  	  'part_alternation_mark':'\u303d\ufe0f',
+  	  'partly_sunny':'\u26c5\ufe0f',
+  	  'passenger_ship':'\ud83d\udef3',
+  	  'passport_control':'\ud83d\udec2',
+  	  'pause_button':'\u23f8',
+  	  'peace_symbol':'\u262e\ufe0f',
+  	  'peach':'\ud83c\udf51',
+  	  'peanuts':'\ud83e\udd5c',
+  	  'pear':'\ud83c\udf50',
+  	  'pen':'\ud83d\udd8a',
+  	  'pencil2':'\u270f\ufe0f',
+  	  'penguin':'\ud83d\udc27',
+  	  'pensive':'\ud83d\ude14',
+  	  'performing_arts':'\ud83c\udfad',
+  	  'persevere':'\ud83d\ude23',
+  	  'person_fencing':'\ud83e\udd3a',
+  	  'pouting_woman':'\ud83d\ude4e',
+  	  'phone':'\u260e\ufe0f',
+  	  'pick':'\u26cf',
+  	  'pig':'\ud83d\udc37',
+  	  'pig2':'\ud83d\udc16',
+  	  'pig_nose':'\ud83d\udc3d',
+  	  'pill':'\ud83d\udc8a',
+  	  'pineapple':'\ud83c\udf4d',
+  	  'ping_pong':'\ud83c\udfd3',
+  	  'pisces':'\u2653\ufe0f',
+  	  'pizza':'\ud83c\udf55',
+  	  'place_of_worship':'\ud83d\uded0',
+  	  'plate_with_cutlery':'\ud83c\udf7d',
+  	  'play_or_pause_button':'\u23ef',
+  	  'point_down':'\ud83d\udc47',
+  	  'point_left':'\ud83d\udc48',
+  	  'point_right':'\ud83d\udc49',
+  	  'point_up':'\u261d\ufe0f',
+  	  'point_up_2':'\ud83d\udc46',
+  	  'police_car':'\ud83d\ude93',
+  	  'policewoman':'\ud83d\udc6e&zwj;\u2640\ufe0f',
+  	  'poodle':'\ud83d\udc29',
+  	  'popcorn':'\ud83c\udf7f',
+  	  'post_office':'\ud83c\udfe3',
+  	  'postal_horn':'\ud83d\udcef',
+  	  'postbox':'\ud83d\udcee',
+  	  'potable_water':'\ud83d\udeb0',
+  	  'potato':'\ud83e\udd54',
+  	  'pouch':'\ud83d\udc5d',
+  	  'poultry_leg':'\ud83c\udf57',
+  	  'pound':'\ud83d\udcb7',
+  	  'rage':'\ud83d\ude21',
+  	  'pouting_cat':'\ud83d\ude3e',
+  	  'pouting_man':'\ud83d\ude4e&zwj;\u2642\ufe0f',
+  	  'pray':'\ud83d\ude4f',
+  	  'prayer_beads':'\ud83d\udcff',
+  	  'pregnant_woman':'\ud83e\udd30',
+  	  'previous_track_button':'\u23ee',
+  	  'prince':'\ud83e\udd34',
+  	  'princess':'\ud83d\udc78',
+  	  'printer':'\ud83d\udda8',
+  	  'purple_heart':'\ud83d\udc9c',
+  	  'purse':'\ud83d\udc5b',
+  	  'pushpin':'\ud83d\udccc',
+  	  'put_litter_in_its_place':'\ud83d\udeae',
+  	  'question':'\u2753',
+  	  'rabbit':'\ud83d\udc30',
+  	  'rabbit2':'\ud83d\udc07',
+  	  'racehorse':'\ud83d\udc0e',
+  	  'racing_car':'\ud83c\udfce',
+  	  'radio':'\ud83d\udcfb',
+  	  'radio_button':'\ud83d\udd18',
+  	  'radioactive':'\u2622\ufe0f',
+  	  'railway_car':'\ud83d\ude83',
+  	  'railway_track':'\ud83d\udee4',
+  	  'rainbow':'\ud83c\udf08',
+  	  'rainbow_flag':'\ud83c\udff3\ufe0f&zwj;\ud83c\udf08',
+  	  'raised_back_of_hand':'\ud83e\udd1a',
+  	  'raised_hand_with_fingers_splayed':'\ud83d\udd90',
+  	  'raised_hands':'\ud83d\ude4c',
+  	  'raising_hand_woman':'\ud83d\ude4b',
+  	  'raising_hand_man':'\ud83d\ude4b&zwj;\u2642\ufe0f',
+  	  'ram':'\ud83d\udc0f',
+  	  'ramen':'\ud83c\udf5c',
+  	  'rat':'\ud83d\udc00',
+  	  'record_button':'\u23fa',
+  	  'recycle':'\u267b\ufe0f',
+  	  'red_circle':'\ud83d\udd34',
+  	  'registered':'\u00ae\ufe0f',
+  	  'relaxed':'\u263a\ufe0f',
+  	  'relieved':'\ud83d\ude0c',
+  	  'reminder_ribbon':'\ud83c\udf97',
+  	  'repeat':'\ud83d\udd01',
+  	  'repeat_one':'\ud83d\udd02',
+  	  'rescue_worker_helmet':'\u26d1',
+  	  'restroom':'\ud83d\udebb',
+  	  'revolving_hearts':'\ud83d\udc9e',
+  	  'rewind':'\u23ea',
+  	  'rhinoceros':'\ud83e\udd8f',
+  	  'ribbon':'\ud83c\udf80',
+  	  'rice':'\ud83c\udf5a',
+  	  'rice_ball':'\ud83c\udf59',
+  	  'rice_cracker':'\ud83c\udf58',
+  	  'rice_scene':'\ud83c\udf91',
+  	  'right_anger_bubble':'\ud83d\uddef',
+  	  'ring':'\ud83d\udc8d',
+  	  'robot':'\ud83e\udd16',
+  	  'rocket':'\ud83d\ude80',
+  	  'rofl':'\ud83e\udd23',
+  	  'roll_eyes':'\ud83d\ude44',
+  	  'roller_coaster':'\ud83c\udfa2',
+  	  'rooster':'\ud83d\udc13',
+  	  'rose':'\ud83c\udf39',
+  	  'rosette':'\ud83c\udff5',
+  	  'rotating_light':'\ud83d\udea8',
+  	  'round_pushpin':'\ud83d\udccd',
+  	  'rowing_man':'\ud83d\udea3',
+  	  'rowing_woman':'\ud83d\udea3&zwj;\u2640\ufe0f',
+  	  'rugby_football':'\ud83c\udfc9',
+  	  'running_man':'\ud83c\udfc3',
+  	  'running_shirt_with_sash':'\ud83c\udfbd',
+  	  'running_woman':'\ud83c\udfc3&zwj;\u2640\ufe0f',
+  	  'sa':'\ud83c\ude02\ufe0f',
+  	  'sagittarius':'\u2650\ufe0f',
+  	  'sake':'\ud83c\udf76',
+  	  'sandal':'\ud83d\udc61',
+  	  'santa':'\ud83c\udf85',
+  	  'satellite':'\ud83d\udce1',
+  	  'saxophone':'\ud83c\udfb7',
+  	  'school':'\ud83c\udfeb',
+  	  'school_satchel':'\ud83c\udf92',
+  	  'scissors':'\u2702\ufe0f',
+  	  'scorpion':'\ud83e\udd82',
+  	  'scorpius':'\u264f\ufe0f',
+  	  'scream':'\ud83d\ude31',
+  	  'scream_cat':'\ud83d\ude40',
+  	  'scroll':'\ud83d\udcdc',
+  	  'seat':'\ud83d\udcba',
+  	  'secret':'\u3299\ufe0f',
+  	  'see_no_evil':'\ud83d\ude48',
+  	  'seedling':'\ud83c\udf31',
+  	  'selfie':'\ud83e\udd33',
+  	  'shallow_pan_of_food':'\ud83e\udd58',
+  	  'shamrock':'\u2618\ufe0f',
+  	  'shark':'\ud83e\udd88',
+  	  'shaved_ice':'\ud83c\udf67',
+  	  'sheep':'\ud83d\udc11',
+  	  'shell':'\ud83d\udc1a',
+  	  'shield':'\ud83d\udee1',
+  	  'shinto_shrine':'\u26e9',
+  	  'ship':'\ud83d\udea2',
+  	  'shirt':'\ud83d\udc55',
+  	  'shopping':'\ud83d\udecd',
+  	  'shopping_cart':'\ud83d\uded2',
+  	  'shower':'\ud83d\udebf',
+  	  'shrimp':'\ud83e\udd90',
+  	  'signal_strength':'\ud83d\udcf6',
+  	  'six_pointed_star':'\ud83d\udd2f',
+  	  'ski':'\ud83c\udfbf',
+  	  'skier':'\u26f7',
+  	  'skull':'\ud83d\udc80',
+  	  'skull_and_crossbones':'\u2620\ufe0f',
+  	  'sleeping':'\ud83d\ude34',
+  	  'sleeping_bed':'\ud83d\udecc',
+  	  'sleepy':'\ud83d\ude2a',
+  	  'slightly_frowning_face':'\ud83d\ude41',
+  	  'slightly_smiling_face':'\ud83d\ude42',
+  	  'slot_machine':'\ud83c\udfb0',
+  	  'small_airplane':'\ud83d\udee9',
+  	  'small_blue_diamond':'\ud83d\udd39',
+  	  'small_orange_diamond':'\ud83d\udd38',
+  	  'small_red_triangle':'\ud83d\udd3a',
+  	  'small_red_triangle_down':'\ud83d\udd3b',
+  	  'smile':'\ud83d\ude04',
+  	  'smile_cat':'\ud83d\ude38',
+  	  'smiley':'\ud83d\ude03',
+  	  'smiley_cat':'\ud83d\ude3a',
+  	  'smiling_imp':'\ud83d\ude08',
+  	  'smirk':'\ud83d\ude0f',
+  	  'smirk_cat':'\ud83d\ude3c',
+  	  'smoking':'\ud83d\udeac',
+  	  'snail':'\ud83d\udc0c',
+  	  'snake':'\ud83d\udc0d',
+  	  'sneezing_face':'\ud83e\udd27',
+  	  'snowboarder':'\ud83c\udfc2',
+  	  'snowflake':'\u2744\ufe0f',
+  	  'snowman':'\u26c4\ufe0f',
+  	  'snowman_with_snow':'\u2603\ufe0f',
+  	  'sob':'\ud83d\ude2d',
+  	  'soccer':'\u26bd\ufe0f',
+  	  'soon':'\ud83d\udd1c',
+  	  'sos':'\ud83c\udd98',
+  	  'sound':'\ud83d\udd09',
+  	  'space_invader':'\ud83d\udc7e',
+  	  'spades':'\u2660\ufe0f',
+  	  'spaghetti':'\ud83c\udf5d',
+  	  'sparkle':'\u2747\ufe0f',
+  	  'sparkler':'\ud83c\udf87',
+  	  'sparkles':'\u2728',
+  	  'sparkling_heart':'\ud83d\udc96',
+  	  'speak_no_evil':'\ud83d\ude4a',
+  	  'speaker':'\ud83d\udd08',
+  	  'speaking_head':'\ud83d\udde3',
+  	  'speech_balloon':'\ud83d\udcac',
+  	  'speedboat':'\ud83d\udea4',
+  	  'spider':'\ud83d\udd77',
+  	  'spider_web':'\ud83d\udd78',
+  	  'spiral_calendar':'\ud83d\uddd3',
+  	  'spiral_notepad':'\ud83d\uddd2',
+  	  'spoon':'\ud83e\udd44',
+  	  'squid':'\ud83e\udd91',
+  	  'stadium':'\ud83c\udfdf',
+  	  'star':'\u2b50\ufe0f',
+  	  'star2':'\ud83c\udf1f',
+  	  'star_and_crescent':'\u262a\ufe0f',
+  	  'star_of_david':'\u2721\ufe0f',
+  	  'stars':'\ud83c\udf20',
+  	  'station':'\ud83d\ude89',
+  	  'statue_of_liberty':'\ud83d\uddfd',
+  	  'steam_locomotive':'\ud83d\ude82',
+  	  'stew':'\ud83c\udf72',
+  	  'stop_button':'\u23f9',
+  	  'stop_sign':'\ud83d\uded1',
+  	  'stopwatch':'\u23f1',
+  	  'straight_ruler':'\ud83d\udccf',
+  	  'strawberry':'\ud83c\udf53',
+  	  'stuck_out_tongue':'\ud83d\ude1b',
+  	  'stuck_out_tongue_closed_eyes':'\ud83d\ude1d',
+  	  'stuck_out_tongue_winking_eye':'\ud83d\ude1c',
+  	  'studio_microphone':'\ud83c\udf99',
+  	  'stuffed_flatbread':'\ud83e\udd59',
+  	  'sun_behind_large_cloud':'\ud83c\udf25',
+  	  'sun_behind_rain_cloud':'\ud83c\udf26',
+  	  'sun_behind_small_cloud':'\ud83c\udf24',
+  	  'sun_with_face':'\ud83c\udf1e',
+  	  'sunflower':'\ud83c\udf3b',
+  	  'sunglasses':'\ud83d\ude0e',
+  	  'sunny':'\u2600\ufe0f',
+  	  'sunrise':'\ud83c\udf05',
+  	  'sunrise_over_mountains':'\ud83c\udf04',
+  	  'surfing_man':'\ud83c\udfc4',
+  	  'surfing_woman':'\ud83c\udfc4&zwj;\u2640\ufe0f',
+  	  'sushi':'\ud83c\udf63',
+  	  'suspension_railway':'\ud83d\ude9f',
+  	  'sweat':'\ud83d\ude13',
+  	  'sweat_drops':'\ud83d\udca6',
+  	  'sweat_smile':'\ud83d\ude05',
+  	  'sweet_potato':'\ud83c\udf60',
+  	  'swimming_man':'\ud83c\udfca',
+  	  'swimming_woman':'\ud83c\udfca&zwj;\u2640\ufe0f',
+  	  'symbols':'\ud83d\udd23',
+  	  'synagogue':'\ud83d\udd4d',
+  	  'syringe':'\ud83d\udc89',
+  	  'taco':'\ud83c\udf2e',
+  	  'tada':'\ud83c\udf89',
+  	  'tanabata_tree':'\ud83c\udf8b',
+  	  'taurus':'\u2649\ufe0f',
+  	  'taxi':'\ud83d\ude95',
+  	  'tea':'\ud83c\udf75',
+  	  'telephone_receiver':'\ud83d\udcde',
+  	  'telescope':'\ud83d\udd2d',
+  	  'tennis':'\ud83c\udfbe',
+  	  'tent':'\u26fa\ufe0f',
+  	  'thermometer':'\ud83c\udf21',
+  	  'thinking':'\ud83e\udd14',
+  	  'thought_balloon':'\ud83d\udcad',
+  	  'ticket':'\ud83c\udfab',
+  	  'tickets':'\ud83c\udf9f',
+  	  'tiger':'\ud83d\udc2f',
+  	  'tiger2':'\ud83d\udc05',
+  	  'timer_clock':'\u23f2',
+  	  'tipping_hand_man':'\ud83d\udc81&zwj;\u2642\ufe0f',
+  	  'tired_face':'\ud83d\ude2b',
+  	  'tm':'\u2122\ufe0f',
+  	  'toilet':'\ud83d\udebd',
+  	  'tokyo_tower':'\ud83d\uddfc',
+  	  'tomato':'\ud83c\udf45',
+  	  'tongue':'\ud83d\udc45',
+  	  'top':'\ud83d\udd1d',
+  	  'tophat':'\ud83c\udfa9',
+  	  'tornado':'\ud83c\udf2a',
+  	  'trackball':'\ud83d\uddb2',
+  	  'tractor':'\ud83d\ude9c',
+  	  'traffic_light':'\ud83d\udea5',
+  	  'train':'\ud83d\ude8b',
+  	  'train2':'\ud83d\ude86',
+  	  'tram':'\ud83d\ude8a',
+  	  'triangular_flag_on_post':'\ud83d\udea9',
+  	  'triangular_ruler':'\ud83d\udcd0',
+  	  'trident':'\ud83d\udd31',
+  	  'triumph':'\ud83d\ude24',
+  	  'trolleybus':'\ud83d\ude8e',
+  	  'trophy':'\ud83c\udfc6',
+  	  'tropical_drink':'\ud83c\udf79',
+  	  'tropical_fish':'\ud83d\udc20',
+  	  'truck':'\ud83d\ude9a',
+  	  'trumpet':'\ud83c\udfba',
+  	  'tulip':'\ud83c\udf37',
+  	  'tumbler_glass':'\ud83e\udd43',
+  	  'turkey':'\ud83e\udd83',
+  	  'turtle':'\ud83d\udc22',
+  	  'tv':'\ud83d\udcfa',
+  	  'twisted_rightwards_arrows':'\ud83d\udd00',
+  	  'two_hearts':'\ud83d\udc95',
+  	  'two_men_holding_hands':'\ud83d\udc6c',
+  	  'two_women_holding_hands':'\ud83d\udc6d',
+  	  'u5272':'\ud83c\ude39',
+  	  'u5408':'\ud83c\ude34',
+  	  'u55b6':'\ud83c\ude3a',
+  	  'u6307':'\ud83c\ude2f\ufe0f',
+  	  'u6708':'\ud83c\ude37\ufe0f',
+  	  'u6709':'\ud83c\ude36',
+  	  'u6e80':'\ud83c\ude35',
+  	  'u7121':'\ud83c\ude1a\ufe0f',
+  	  'u7533':'\ud83c\ude38',
+  	  'u7981':'\ud83c\ude32',
+  	  'u7a7a':'\ud83c\ude33',
+  	  'umbrella':'\u2614\ufe0f',
+  	  'unamused':'\ud83d\ude12',
+  	  'underage':'\ud83d\udd1e',
+  	  'unicorn':'\ud83e\udd84',
+  	  'unlock':'\ud83d\udd13',
+  	  'up':'\ud83c\udd99',
+  	  'upside_down_face':'\ud83d\ude43',
+  	  'v':'\u270c\ufe0f',
+  	  'vertical_traffic_light':'\ud83d\udea6',
+  	  'vhs':'\ud83d\udcfc',
+  	  'vibration_mode':'\ud83d\udcf3',
+  	  'video_camera':'\ud83d\udcf9',
+  	  'video_game':'\ud83c\udfae',
+  	  'violin':'\ud83c\udfbb',
+  	  'virgo':'\u264d\ufe0f',
+  	  'volcano':'\ud83c\udf0b',
+  	  'volleyball':'\ud83c\udfd0',
+  	  'vs':'\ud83c\udd9a',
+  	  'vulcan_salute':'\ud83d\udd96',
+  	  'walking_man':'\ud83d\udeb6',
+  	  'walking_woman':'\ud83d\udeb6&zwj;\u2640\ufe0f',
+  	  'waning_crescent_moon':'\ud83c\udf18',
+  	  'waning_gibbous_moon':'\ud83c\udf16',
+  	  'warning':'\u26a0\ufe0f',
+  	  'wastebasket':'\ud83d\uddd1',
+  	  'watch':'\u231a\ufe0f',
+  	  'water_buffalo':'\ud83d\udc03',
+  	  'watermelon':'\ud83c\udf49',
+  	  'wave':'\ud83d\udc4b',
+  	  'wavy_dash':'\u3030\ufe0f',
+  	  'waxing_crescent_moon':'\ud83c\udf12',
+  	  'wc':'\ud83d\udebe',
+  	  'weary':'\ud83d\ude29',
+  	  'wedding':'\ud83d\udc92',
+  	  'weight_lifting_man':'\ud83c\udfcb\ufe0f',
+  	  'weight_lifting_woman':'\ud83c\udfcb\ufe0f&zwj;\u2640\ufe0f',
+  	  'whale':'\ud83d\udc33',
+  	  'whale2':'\ud83d\udc0b',
+  	  'wheel_of_dharma':'\u2638\ufe0f',
+  	  'wheelchair':'\u267f\ufe0f',
+  	  'white_check_mark':'\u2705',
+  	  'white_circle':'\u26aa\ufe0f',
+  	  'white_flag':'\ud83c\udff3\ufe0f',
+  	  'white_flower':'\ud83d\udcae',
+  	  'white_large_square':'\u2b1c\ufe0f',
+  	  'white_medium_small_square':'\u25fd\ufe0f',
+  	  'white_medium_square':'\u25fb\ufe0f',
+  	  'white_small_square':'\u25ab\ufe0f',
+  	  'white_square_button':'\ud83d\udd33',
+  	  'wilted_flower':'\ud83e\udd40',
+  	  'wind_chime':'\ud83c\udf90',
+  	  'wind_face':'\ud83c\udf2c',
+  	  'wine_glass':'\ud83c\udf77',
+  	  'wink':'\ud83d\ude09',
+  	  'wolf':'\ud83d\udc3a',
+  	  'woman':'\ud83d\udc69',
+  	  'woman_artist':'\ud83d\udc69&zwj;\ud83c\udfa8',
+  	  'woman_astronaut':'\ud83d\udc69&zwj;\ud83d\ude80',
+  	  'woman_cartwheeling':'\ud83e\udd38&zwj;\u2640\ufe0f',
+  	  'woman_cook':'\ud83d\udc69&zwj;\ud83c\udf73',
+  	  'woman_facepalming':'\ud83e\udd26&zwj;\u2640\ufe0f',
+  	  'woman_factory_worker':'\ud83d\udc69&zwj;\ud83c\udfed',
+  	  'woman_farmer':'\ud83d\udc69&zwj;\ud83c\udf3e',
+  	  'woman_firefighter':'\ud83d\udc69&zwj;\ud83d\ude92',
+  	  'woman_health_worker':'\ud83d\udc69&zwj;\u2695\ufe0f',
+  	  'woman_judge':'\ud83d\udc69&zwj;\u2696\ufe0f',
+  	  'woman_juggling':'\ud83e\udd39&zwj;\u2640\ufe0f',
+  	  'woman_mechanic':'\ud83d\udc69&zwj;\ud83d\udd27',
+  	  'woman_office_worker':'\ud83d\udc69&zwj;\ud83d\udcbc',
+  	  'woman_pilot':'\ud83d\udc69&zwj;\u2708\ufe0f',
+  	  'woman_playing_handball':'\ud83e\udd3e&zwj;\u2640\ufe0f',
+  	  'woman_playing_water_polo':'\ud83e\udd3d&zwj;\u2640\ufe0f',
+  	  'woman_scientist':'\ud83d\udc69&zwj;\ud83d\udd2c',
+  	  'woman_shrugging':'\ud83e\udd37&zwj;\u2640\ufe0f',
+  	  'woman_singer':'\ud83d\udc69&zwj;\ud83c\udfa4',
+  	  'woman_student':'\ud83d\udc69&zwj;\ud83c\udf93',
+  	  'woman_teacher':'\ud83d\udc69&zwj;\ud83c\udfeb',
+  	  'woman_technologist':'\ud83d\udc69&zwj;\ud83d\udcbb',
+  	  'woman_with_turban':'\ud83d\udc73&zwj;\u2640\ufe0f',
+  	  'womans_clothes':'\ud83d\udc5a',
+  	  'womans_hat':'\ud83d\udc52',
+  	  'women_wrestling':'\ud83e\udd3c&zwj;\u2640\ufe0f',
+  	  'womens':'\ud83d\udeba',
+  	  'world_map':'\ud83d\uddfa',
+  	  'worried':'\ud83d\ude1f',
+  	  'wrench':'\ud83d\udd27',
+  	  'writing_hand':'\u270d\ufe0f',
+  	  'x':'\u274c',
+  	  'yellow_heart':'\ud83d\udc9b',
+  	  'yen':'\ud83d\udcb4',
+  	  'yin_yang':'\u262f\ufe0f',
+  	  'yum':'\ud83d\ude0b',
+  	  'zap':'\u26a1\ufe0f',
+  	  'zipper_mouth_face':'\ud83e\udd10',
+  	  'zzz':'\ud83d\udca4',
+
+  	  /* special emojis :P */
+  	  'octocat':  '<img alt=":octocat:" height="20" width="20" align="absmiddle" src="https://assets-cdn.github.com/images/icons/emoji/octocat.png">',
+  	  'showdown': '<span style="font-family: \'Anonymous Pro\', monospace; text-decoration: underline; text-decoration-style: dashed; text-decoration-color: #3e8b8a;text-underline-position: under;">S</span>'
+  	};
+
+  	/**
+  	 * Created by Estevao on 31-05-2015.
+  	 */
+
+  	/**
+  	 * Showdown Converter class
+  	 * @class
+  	 * @param {object} [converterOptions]
+  	 * @returns {Converter}
+  	 */
+  	showdown.Converter = function (converterOptions) {
+
+  	  var
+  	      /**
+  	       * Options used by this converter
+  	       * @private
+  	       * @type {{}}
+  	       */
+  	      options = {},
+
+  	      /**
+  	       * Language extensions used by this converter
+  	       * @private
+  	       * @type {Array}
+  	       */
+  	      langExtensions = [],
+
+  	      /**
+  	       * Output modifiers extensions used by this converter
+  	       * @private
+  	       * @type {Array}
+  	       */
+  	      outputModifiers = [],
+
+  	      /**
+  	       * Event listeners
+  	       * @private
+  	       * @type {{}}
+  	       */
+  	      listeners = {},
+
+  	      /**
+  	       * The flavor set in this converter
+  	       */
+  	      setConvFlavor = setFlavor,
+
+  	      /**
+  	       * Metadata of the document
+  	       * @type {{parsed: {}, raw: string, format: string}}
+  	       */
+  	      metadata = {
+  	        parsed: {},
+  	        raw: '',
+  	        format: ''
+  	      };
+
+  	  _constructor();
+
+  	  /**
+  	   * Converter constructor
+  	   * @private
+  	   */
+  	  function _constructor () {
+  	    converterOptions = converterOptions || {};
+
+  	    for (var gOpt in globalOptions) {
+  	      if (globalOptions.hasOwnProperty(gOpt)) {
+  	        options[gOpt] = globalOptions[gOpt];
+  	      }
+  	    }
+
+  	    // Merge options
+  	    if (typeof converterOptions === 'object') {
+  	      for (var opt in converterOptions) {
+  	        if (converterOptions.hasOwnProperty(opt)) {
+  	          options[opt] = converterOptions[opt];
+  	        }
+  	      }
+  	    } else {
+  	      throw Error('Converter expects the passed parameter to be an object, but ' + typeof converterOptions +
+  	      ' was passed instead.');
+  	    }
+
+  	    if (options.extensions) {
+  	      showdown.helper.forEach(options.extensions, _parseExtension);
+  	    }
+  	  }
+
+  	  /**
+  	   * Parse extension
+  	   * @param {*} ext
+  	   * @param {string} [name='']
+  	   * @private
+  	   */
+  	  function _parseExtension (ext, name) {
+
+  	    name = name || null;
+  	    // If it's a string, the extension was previously loaded
+  	    if (showdown.helper.isString(ext)) {
+  	      ext = showdown.helper.stdExtName(ext);
+  	      name = ext;
+
+  	      // LEGACY_SUPPORT CODE
+  	      if (showdown.extensions[ext]) {
+  	        console.warn('DEPRECATION WARNING: ' + ext + ' is an old extension that uses a deprecated loading method.' +
+  	          'Please inform the developer that the extension should be updated!');
+  	        legacyExtensionLoading(showdown.extensions[ext], ext);
+  	        return;
+  	        // END LEGACY SUPPORT CODE
+
+  	      } else if (!showdown.helper.isUndefined(extensions[ext])) {
+  	        ext = extensions[ext];
+
+  	      } else {
+  	        throw Error('Extension "' + ext + '" could not be loaded. It was either not found or is not a valid extension.');
+  	      }
+  	    }
+
+  	    if (typeof ext === 'function') {
+  	      ext = ext();
+  	    }
+
+  	    if (!showdown.helper.isArray(ext)) {
+  	      ext = [ext];
+  	    }
+
+  	    var validExt = validate(ext, name);
+  	    if (!validExt.valid) {
+  	      throw Error(validExt.error);
+  	    }
+
+  	    for (var i = 0; i < ext.length; ++i) {
+  	      switch (ext[i].type) {
+
+  	        case 'lang':
+  	          langExtensions.push(ext[i]);
+  	          break;
+
+  	        case 'output':
+  	          outputModifiers.push(ext[i]);
+  	          break;
+  	      }
+  	      if (ext[i].hasOwnProperty('listeners')) {
+  	        for (var ln in ext[i].listeners) {
+  	          if (ext[i].listeners.hasOwnProperty(ln)) {
+  	            listen(ln, ext[i].listeners[ln]);
+  	          }
+  	        }
+  	      }
+  	    }
+
+  	  }
+
+  	  /**
+  	   * LEGACY_SUPPORT
+  	   * @param {*} ext
+  	   * @param {string} name
+  	   */
+  	  function legacyExtensionLoading (ext, name) {
+  	    if (typeof ext === 'function') {
+  	      ext = ext(new showdown.Converter());
+  	    }
+  	    if (!showdown.helper.isArray(ext)) {
+  	      ext = [ext];
+  	    }
+  	    var valid = validate(ext, name);
+
+  	    if (!valid.valid) {
+  	      throw Error(valid.error);
+  	    }
+
+  	    for (var i = 0; i < ext.length; ++i) {
+  	      switch (ext[i].type) {
+  	        case 'lang':
+  	          langExtensions.push(ext[i]);
+  	          break;
+  	        case 'output':
+  	          outputModifiers.push(ext[i]);
+  	          break;
+  	        default:// should never reach here
+  	          throw Error('Extension loader error: Type unrecognized!!!');
+  	      }
+  	    }
+  	  }
+
+  	  /**
+  	   * Listen to an event
+  	   * @param {string} name
+  	   * @param {function} callback
+  	   */
+  	  function listen (name, callback) {
+  	    if (!showdown.helper.isString(name)) {
+  	      throw Error('Invalid argument in converter.listen() method: name must be a string, but ' + typeof name + ' given');
+  	    }
+
+  	    if (typeof callback !== 'function') {
+  	      throw Error('Invalid argument in converter.listen() method: callback must be a function, but ' + typeof callback + ' given');
+  	    }
+
+  	    if (!listeners.hasOwnProperty(name)) {
+  	      listeners[name] = [];
+  	    }
+  	    listeners[name].push(callback);
+  	  }
+
+  	  function rTrimInputText (text) {
+  	    var rsp = text.match(/^\s*/)[0].length,
+  	        rgx = new RegExp('^\\s{0,' + rsp + '}', 'gm');
+  	    return text.replace(rgx, '');
+  	  }
+
+  	  /**
+  	   * Dispatch an event
+  	   * @private
+  	   * @param {string} evtName Event name
+  	   * @param {string} text Text
+  	   * @param {{}} options Converter Options
+  	   * @param {{}} globals
+  	   * @returns {string}
+  	   */
+  	  this._dispatch = function dispatch (evtName, text, options, globals) {
+  	    if (listeners.hasOwnProperty(evtName)) {
+  	      for (var ei = 0; ei < listeners[evtName].length; ++ei) {
+  	        var nText = listeners[evtName][ei](evtName, text, this, options, globals);
+  	        if (nText && typeof nText !== 'undefined') {
+  	          text = nText;
+  	        }
+  	      }
+  	    }
+  	    return text;
+  	  };
+
+  	  /**
+  	   * Listen to an event
+  	   * @param {string} name
+  	   * @param {function} callback
+  	   * @returns {showdown.Converter}
+  	   */
+  	  this.listen = function (name, callback) {
+  	    listen(name, callback);
+  	    return this;
+  	  };
+
+  	  /**
+  	   * Converts a markdown string into HTML
+  	   * @param {string} text
+  	   * @returns {*}
+  	   */
+  	  this.makeHtml = function (text) {
+  	    //check if text is not falsy
+  	    if (!text) {
+  	      return text;
+  	    }
+
+  	    var globals = {
+  	      gHtmlBlocks:     [],
+  	      gHtmlMdBlocks:   [],
+  	      gHtmlSpans:      [],
+  	      gUrls:           {},
+  	      gTitles:         {},
+  	      gDimensions:     {},
+  	      gListLevel:      0,
+  	      hashLinkCounts:  {},
+  	      langExtensions:  langExtensions,
+  	      outputModifiers: outputModifiers,
+  	      converter:       this,
+  	      ghCodeBlocks:    [],
+  	      metadata: {
+  	        parsed: {},
+  	        raw: '',
+  	        format: ''
+  	      }
+  	    };
+
+  	    // This lets us use ¨ trema as an escape char to avoid md5 hashes
+  	    // The choice of character is arbitrary; anything that isn't
+  	    // magic in Markdown will work.
+  	    text = text.replace(/¨/g, '¨T');
+
+  	    // Replace $ with ¨D
+  	    // RegExp interprets $ as a special character
+  	    // when it's in a replacement string
+  	    text = text.replace(/\$/g, '¨D');
+
+  	    // Standardize line endings
+  	    text = text.replace(/\r\n/g, '\n'); // DOS to Unix
+  	    text = text.replace(/\r/g, '\n'); // Mac to Unix
+
+  	    // Stardardize line spaces
+  	    text = text.replace(/\u00A0/g, '&nbsp;');
+
+  	    if (options.smartIndentationFix) {
+  	      text = rTrimInputText(text);
+  	    }
+
+  	    // Make sure text begins and ends with a couple of newlines:
+  	    text = '\n\n' + text + '\n\n';
+
+  	    // detab
+  	    text = showdown.subParser('detab')(text, options, globals);
+
+  	    /**
+  	     * Strip any lines consisting only of spaces and tabs.
+  	     * This makes subsequent regexs easier to write, because we can
+  	     * match consecutive blank lines with /\n+/ instead of something
+  	     * contorted like /[ \t]*\n+/
+  	     */
+  	    text = text.replace(/^[ \t]+$/mg, '');
+
+  	    //run languageExtensions
+  	    showdown.helper.forEach(langExtensions, function (ext) {
+  	      text = showdown.subParser('runExtension')(ext, text, options, globals);
+  	    });
+
+  	    // run the sub parsers
+  	    text = showdown.subParser('metadata')(text, options, globals);
+  	    text = showdown.subParser('hashPreCodeTags')(text, options, globals);
+  	    text = showdown.subParser('githubCodeBlocks')(text, options, globals);
+  	    text = showdown.subParser('hashHTMLBlocks')(text, options, globals);
+  	    text = showdown.subParser('hashCodeTags')(text, options, globals);
+  	    text = showdown.subParser('stripLinkDefinitions')(text, options, globals);
+  	    text = showdown.subParser('blockGamut')(text, options, globals);
+  	    text = showdown.subParser('unhashHTMLSpans')(text, options, globals);
+  	    text = showdown.subParser('unescapeSpecialChars')(text, options, globals);
+
+  	    // attacklab: Restore dollar signs
+  	    text = text.replace(/¨D/g, '$$');
+
+  	    // attacklab: Restore tremas
+  	    text = text.replace(/¨T/g, '¨');
+
+  	    // render a complete html document instead of a partial if the option is enabled
+  	    text = showdown.subParser('completeHTMLDocument')(text, options, globals);
+
+  	    // Run output modifiers
+  	    showdown.helper.forEach(outputModifiers, function (ext) {
+  	      text = showdown.subParser('runExtension')(ext, text, options, globals);
+  	    });
+
+  	    // update metadata
+  	    metadata = globals.metadata;
+  	    return text;
+  	  };
+
+  	  /**
+  	   * Converts an HTML string into a markdown string
+  	   * @param src
+  	   * @param [HTMLParser] A WHATWG DOM and HTML parser, such as JSDOM. If none is supplied, window.document will be used.
+  	   * @returns {string}
+  	   */
+  	  this.makeMarkdown = this.makeMd = function (src, HTMLParser) {
+
+  	    // replace \r\n with \n
+  	    src = src.replace(/\r\n/g, '\n');
+  	    src = src.replace(/\r/g, '\n'); // old macs
+
+  	    // due to an edge case, we need to find this: > <
+  	    // to prevent removing of non silent white spaces
+  	    // ex: <em>this is</em> <strong>sparta</strong>
+  	    src = src.replace(/>[ \t]+</, '>¨NBSP;<');
+
+  	    if (!HTMLParser) {
+  	      if (window && window.document) {
+  	        HTMLParser = window.document;
+  	      } else {
+  	        throw new Error('HTMLParser is undefined. If in a webworker or nodejs environment, you need to provide a WHATWG DOM and HTML such as JSDOM');
+  	      }
+  	    }
+
+  	    var doc = HTMLParser.createElement('div');
+  	    doc.innerHTML = src;
+
+  	    var globals = {
+  	      preList: substitutePreCodeTags(doc)
+  	    };
+
+  	    // remove all newlines and collapse spaces
+  	    clean(doc);
+
+  	    // some stuff, like accidental reference links must now be escaped
+  	    // TODO
+  	    // doc.innerHTML = doc.innerHTML.replace(/\[[\S\t ]]/);
+
+  	    var nodes = doc.childNodes,
+  	        mdDoc = '';
+
+  	    for (var i = 0; i < nodes.length; i++) {
+  	      mdDoc += showdown.subParser('makeMarkdown.node')(nodes[i], globals);
+  	    }
+
+  	    function clean (node) {
+  	      for (var n = 0; n < node.childNodes.length; ++n) {
+  	        var child = node.childNodes[n];
+  	        if (child.nodeType === 3) {
+  	          if (!/\S/.test(child.nodeValue) && !/^[ ]+$/.test(child.nodeValue)) {
+  	            node.removeChild(child);
+  	            --n;
+  	          } else {
+  	            child.nodeValue = child.nodeValue.split('\n').join(' ');
+  	            child.nodeValue = child.nodeValue.replace(/(\s)+/g, '$1');
+  	          }
+  	        } else if (child.nodeType === 1) {
+  	          clean(child);
+  	        }
+  	      }
+  	    }
+
+  	    // find all pre tags and replace contents with placeholder
+  	    // we need this so that we can remove all indentation from html
+  	    // to ease up parsing
+  	    function substitutePreCodeTags (doc) {
+
+  	      var pres = doc.querySelectorAll('pre'),
+  	          presPH = [];
+
+  	      for (var i = 0; i < pres.length; ++i) {
+
+  	        if (pres[i].childElementCount === 1 && pres[i].firstChild.tagName.toLowerCase() === 'code') {
+  	          var content = pres[i].firstChild.innerHTML.trim(),
+  	              language = pres[i].firstChild.getAttribute('data-language') || '';
+
+  	          // if data-language attribute is not defined, then we look for class language-*
+  	          if (language === '') {
+  	            var classes = pres[i].firstChild.className.split(' ');
+  	            for (var c = 0; c < classes.length; ++c) {
+  	              var matches = classes[c].match(/^language-(.+)$/);
+  	              if (matches !== null) {
+  	                language = matches[1];
+  	                break;
+  	              }
+  	            }
+  	          }
+
+  	          // unescape html entities in content
+  	          content = showdown.helper.unescapeHTMLEntities(content);
+
+  	          presPH.push(content);
+  	          pres[i].outerHTML = '<precode language="' + language + '" precodenum="' + i.toString() + '"></precode>';
+  	        } else {
+  	          presPH.push(pres[i].innerHTML);
+  	          pres[i].innerHTML = '';
+  	          pres[i].setAttribute('prenum', i.toString());
+  	        }
+  	      }
+  	      return presPH;
+  	    }
+
+  	    return mdDoc;
+  	  };
+
+  	  /**
+  	   * Set an option of this Converter instance
+  	   * @param {string} key
+  	   * @param {*} value
+  	   */
+  	  this.setOption = function (key, value) {
+  	    options[key] = value;
+  	  };
+
+  	  /**
+  	   * Get the option of this Converter instance
+  	   * @param {string} key
+  	   * @returns {*}
+  	   */
+  	  this.getOption = function (key) {
+  	    return options[key];
+  	  };
+
+  	  /**
+  	   * Get the options of this Converter instance
+  	   * @returns {{}}
+  	   */
+  	  this.getOptions = function () {
+  	    return options;
+  	  };
+
+  	  /**
+  	   * Add extension to THIS converter
+  	   * @param {{}} extension
+  	   * @param {string} [name=null]
+  	   */
+  	  this.addExtension = function (extension, name) {
+  	    name = name || null;
+  	    _parseExtension(extension, name);
+  	  };
+
+  	  /**
+  	   * Use a global registered extension with THIS converter
+  	   * @param {string} extensionName Name of the previously registered extension
+  	   */
+  	  this.useExtension = function (extensionName) {
+  	    _parseExtension(extensionName);
+  	  };
+
+  	  /**
+  	   * Set the flavor THIS converter should use
+  	   * @param {string} name
+  	   */
+  	  this.setFlavor = function (name) {
+  	    if (!flavor.hasOwnProperty(name)) {
+  	      throw Error(name + ' flavor was not found');
+  	    }
+  	    var preset = flavor[name];
+  	    setConvFlavor = name;
+  	    for (var option in preset) {
+  	      if (preset.hasOwnProperty(option)) {
+  	        options[option] = preset[option];
+  	      }
+  	    }
+  	  };
+
+  	  /**
+  	   * Get the currently set flavor of this converter
+  	   * @returns {string}
+  	   */
+  	  this.getFlavor = function () {
+  	    return setConvFlavor;
+  	  };
+
+  	  /**
+  	   * Remove an extension from THIS converter.
+  	   * Note: This is a costly operation. It's better to initialize a new converter
+  	   * and specify the extensions you wish to use
+  	   * @param {Array} extension
+  	   */
+  	  this.removeExtension = function (extension) {
+  	    if (!showdown.helper.isArray(extension)) {
+  	      extension = [extension];
+  	    }
+  	    for (var a = 0; a < extension.length; ++a) {
+  	      var ext = extension[a];
+  	      for (var i = 0; i < langExtensions.length; ++i) {
+  	        if (langExtensions[i] === ext) {
+  	          langExtensions.splice(i, 1);
+  	        }
+  	      }
+  	      for (var ii = 0; ii < outputModifiers.length; ++ii) {
+  	        if (outputModifiers[ii] === ext) {
+  	          outputModifiers.splice(ii, 1);
+  	        }
+  	      }
+  	    }
+  	  };
+
+  	  /**
+  	   * Get all extension of THIS converter
+  	   * @returns {{language: Array, output: Array}}
+  	   */
+  	  this.getAllExtensions = function () {
+  	    return {
+  	      language: langExtensions,
+  	      output: outputModifiers
+  	    };
+  	  };
+
+  	  /**
+  	   * Get the metadata of the previously parsed document
+  	   * @param raw
+  	   * @returns {string|{}}
+  	   */
+  	  this.getMetadata = function (raw) {
+  	    if (raw) {
+  	      return metadata.raw;
+  	    } else {
+  	      return metadata.parsed;
+  	    }
+  	  };
+
+  	  /**
+  	   * Get the metadata format of the previously parsed document
+  	   * @returns {string}
+  	   */
+  	  this.getMetadataFormat = function () {
+  	    return metadata.format;
+  	  };
+
+  	  /**
+  	   * Private: set a single key, value metadata pair
+  	   * @param {string} key
+  	   * @param {string} value
+  	   */
+  	  this._setMetadataPair = function (key, value) {
+  	    metadata.parsed[key] = value;
+  	  };
+
+  	  /**
+  	   * Private: set metadata format
+  	   * @param {string} format
+  	   */
+  	  this._setMetadataFormat = function (format) {
+  	    metadata.format = format;
+  	  };
+
+  	  /**
+  	   * Private: set metadata raw text
+  	   * @param {string} raw
+  	   */
+  	  this._setMetadataRaw = function (raw) {
+  	    metadata.raw = raw;
+  	  };
+  	};
+
+  	/**
+  	 * Turn Markdown link shortcuts into XHTML <a> tags.
+  	 */
+  	showdown.subParser('anchors', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('anchors.before', text, options, globals);
+
+  	  var writeAnchorTag = function (wholeMatch, linkText, linkId, url, m5, m6, title) {
+  	    if (showdown.helper.isUndefined(title)) {
+  	      title = '';
+  	    }
+  	    linkId = linkId.toLowerCase();
+
+  	    // Special case for explicit empty url
+  	    if (wholeMatch.search(/\(<?\s*>? ?(['"].*['"])?\)$/m) > -1) {
+  	      url = '';
+  	    } else if (!url) {
+  	      if (!linkId) {
+  	        // lower-case and turn embedded newlines into spaces
+  	        linkId = linkText.toLowerCase().replace(/ ?\n/g, ' ');
+  	      }
+  	      url = '#' + linkId;
+
+  	      if (!showdown.helper.isUndefined(globals.gUrls[linkId])) {
+  	        url = globals.gUrls[linkId];
+  	        if (!showdown.helper.isUndefined(globals.gTitles[linkId])) {
+  	          title = globals.gTitles[linkId];
+  	        }
+  	      } else {
+  	        return wholeMatch;
+  	      }
+  	    }
+
+  	    //url = showdown.helper.escapeCharacters(url, '*_', false); // replaced line to improve performance
+  	    url = url.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
+
+  	    var result = '<a href="' + url + '"';
+
+  	    if (title !== '' && title !== null) {
+  	      title = title.replace(/"/g, '&quot;');
+  	      //title = showdown.helper.escapeCharacters(title, '*_', false); // replaced line to improve performance
+  	      title = title.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
+  	      result += ' title="' + title + '"';
+  	    }
+
+  	    // optionLinksInNewWindow only applies
+  	    // to external links. Hash links (#) open in same page
+  	    if (options.openLinksInNewWindow && !/^#/.test(url)) {
+  	      // escaped _
+  	      result += ' rel="noopener noreferrer" target="¨E95Eblank"';
+  	    }
+
+  	    result += '>' + linkText + '</a>';
+
+  	    return result;
+  	  };
+
+  	  // First, handle reference-style links: [link text] [id]
+  	  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)] ?(?:\n *)?\[(.*?)]()()()()/g, writeAnchorTag);
+
+  	  // Next, inline-style links: [link text](url "optional title")
+  	  // cases with crazy urls like ./image/cat1).png
+  	  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)]()[ \t]*\([ \t]?<([^>]*)>(?:[ \t]*((["'])([^"]*?)\5))?[ \t]?\)/g,
+  	    writeAnchorTag);
+
+  	  // normal cases
+  	  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)]()[ \t]*\([ \t]?<?([\S]+?(?:\([\S]*?\)[\S]*?)?)>?(?:[ \t]*((["'])([^"]*?)\5))?[ \t]?\)/g,
+  	    writeAnchorTag);
+
+  	  // handle reference-style shortcuts: [link text]
+  	  // These must come last in case you've also got [link test][1]
+  	  // or [link test](/foo)
+  	  text = text.replace(/\[([^\[\]]+)]()()()()()/g, writeAnchorTag);
+
+  	  // Lastly handle GithubMentions if option is enabled
+  	  if (options.ghMentions) {
+  	    text = text.replace(/(^|\s)(\\)?(@([a-z\d]+(?:[a-z\d.-]+?[a-z\d]+)*))/gmi, function (wm, st, escape, mentions, username) {
+  	      if (escape === '\\') {
+  	        return st + mentions;
+  	      }
+
+  	      //check if options.ghMentionsLink is a string
+  	      if (!showdown.helper.isString(options.ghMentionsLink)) {
+  	        throw new Error('ghMentionsLink option must be a string');
+  	      }
+  	      var lnk = options.ghMentionsLink.replace(/\{u}/g, username),
+  	          target = '';
+  	      if (options.openLinksInNewWindow) {
+  	        target = ' rel="noopener noreferrer" target="¨E95Eblank"';
+  	      }
+  	      return st + '<a href="' + lnk + '"' + target + '>' + mentions + '</a>';
+  	    });
+  	  }
+
+  	  text = globals.converter._dispatch('anchors.after', text, options, globals);
+  	  return text;
+  	});
+
+  	// url allowed chars [a-z\d_.~:/?#[]@!$&'()*+,;=-]
+
+  	var simpleURLRegex  = /([*~_]+|\b)(((https?|ftp|dict):\/\/|www\.)[^'">\s]+?\.[^'">\s]+?)()(\1)?(?=\s|$)(?!["<>])/gi,
+  	    simpleURLRegex2 = /([*~_]+|\b)(((https?|ftp|dict):\/\/|www\.)[^'">\s]+\.[^'">\s]+?)([.!?,()\[\]])?(\1)?(?=\s|$)(?!["<>])/gi,
+  	    delimUrlRegex   = /()<(((https?|ftp|dict):\/\/|www\.)[^'">\s]+)()>()/gi,
+  	    simpleMailRegex = /(^|\s)(?:mailto:)?([A-Za-z0-9!#$%&'*+-/=?^_`{|}~.]+@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)(?=$|\s)/gmi,
+  	    delimMailRegex  = /<()(?:mailto:)?([-.\w]+@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
+
+  	    replaceLink = function (options) {
+  	      return function (wm, leadingMagicChars, link, m2, m3, trailingPunctuation, trailingMagicChars) {
+  	        link = link.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
+  	        var lnkTxt = link,
+  	            append = '',
+  	            target = '',
+  	            lmc    = leadingMagicChars || '',
+  	            tmc    = trailingMagicChars || '';
+  	        if (/^www\./i.test(link)) {
+  	          link = link.replace(/^www\./i, 'http://www.');
+  	        }
+  	        if (options.excludeTrailingPunctuationFromURLs && trailingPunctuation) {
+  	          append = trailingPunctuation;
+  	        }
+  	        if (options.openLinksInNewWindow) {
+  	          target = ' rel="noopener noreferrer" target="¨E95Eblank"';
+  	        }
+  	        return lmc + '<a href="' + link + '"' + target + '>' + lnkTxt + '</a>' + append + tmc;
+  	      };
+  	    },
+
+  	    replaceMail = function (options, globals) {
+  	      return function (wholeMatch, b, mail) {
+  	        var href = 'mailto:';
+  	        b = b || '';
+  	        mail = showdown.subParser('unescapeSpecialChars')(mail, options, globals);
+  	        if (options.encodeEmails) {
+  	          href = showdown.helper.encodeEmailAddress(href + mail);
+  	          mail = showdown.helper.encodeEmailAddress(mail);
+  	        } else {
+  	          href = href + mail;
+  	        }
+  	        return b + '<a href="' + href + '">' + mail + '</a>';
+  	      };
+  	    };
+
+  	showdown.subParser('autoLinks', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('autoLinks.before', text, options, globals);
+
+  	  text = text.replace(delimUrlRegex, replaceLink(options));
+  	  text = text.replace(delimMailRegex, replaceMail(options, globals));
+
+  	  text = globals.converter._dispatch('autoLinks.after', text, options, globals);
+
+  	  return text;
+  	});
+
+  	showdown.subParser('simplifiedAutoLinks', function (text, options, globals) {
+
+  	  if (!options.simplifiedAutoLink) {
+  	    return text;
+  	  }
+
+  	  text = globals.converter._dispatch('simplifiedAutoLinks.before', text, options, globals);
+
+  	  if (options.excludeTrailingPunctuationFromURLs) {
+  	    text = text.replace(simpleURLRegex2, replaceLink(options));
+  	  } else {
+  	    text = text.replace(simpleURLRegex, replaceLink(options));
+  	  }
+  	  text = text.replace(simpleMailRegex, replaceMail(options, globals));
+
+  	  text = globals.converter._dispatch('simplifiedAutoLinks.after', text, options, globals);
+
+  	  return text;
+  	});
+
+  	/**
+  	 * These are all the transformations that form block-level
+  	 * tags like paragraphs, headers, and list items.
+  	 */
+  	showdown.subParser('blockGamut', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('blockGamut.before', text, options, globals);
+
+  	  // we parse blockquotes first so that we can have headings and hrs
+  	  // inside blockquotes
+  	  text = showdown.subParser('blockQuotes')(text, options, globals);
+  	  text = showdown.subParser('headers')(text, options, globals);
+
+  	  // Do Horizontal Rules:
+  	  text = showdown.subParser('horizontalRule')(text, options, globals);
+
+  	  text = showdown.subParser('lists')(text, options, globals);
+  	  text = showdown.subParser('codeBlocks')(text, options, globals);
+  	  text = showdown.subParser('tables')(text, options, globals);
+
+  	  // We already ran _HashHTMLBlocks() before, in Markdown(), but that
+  	  // was to escape raw HTML in the original Markdown source. This time,
+  	  // we're escaping the markup we've just created, so that we don't wrap
+  	  // <p> tags around block-level tags.
+  	  text = showdown.subParser('hashHTMLBlocks')(text, options, globals);
+  	  text = showdown.subParser('paragraphs')(text, options, globals);
+
+  	  text = globals.converter._dispatch('blockGamut.after', text, options, globals);
+
+  	  return text;
+  	});
+
+  	showdown.subParser('blockQuotes', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('blockQuotes.before', text, options, globals);
+
+  	  // add a couple extra lines after the text and endtext mark
+  	  text = text + '\n\n';
+
+  	  var rgx = /(^ {0,3}>[ \t]?.+\n(.+\n)*\n*)+/gm;
+
+  	  if (options.splitAdjacentBlockquotes) {
+  	    rgx = /^ {0,3}>[\s\S]*?(?:\n\n)/gm;
+  	  }
+
+  	  text = text.replace(rgx, function (bq) {
+  	    // attacklab: hack around Konqueror 3.5.4 bug:
+  	    // "----------bug".replace(/^-/g,"") == "bug"
+  	    bq = bq.replace(/^[ \t]*>[ \t]?/gm, ''); // trim one level of quoting
+
+  	    // attacklab: clean up hack
+  	    bq = bq.replace(/¨0/g, '');
+
+  	    bq = bq.replace(/^[ \t]+$/gm, ''); // trim whitespace-only lines
+  	    bq = showdown.subParser('githubCodeBlocks')(bq, options, globals);
+  	    bq = showdown.subParser('blockGamut')(bq, options, globals); // recurse
+
+  	    bq = bq.replace(/(^|\n)/g, '$1  ');
+  	    // These leading spaces screw with <pre> content, so we need to fix that:
+  	    bq = bq.replace(/(\s*<pre>[^\r]+?<\/pre>)/gm, function (wholeMatch, m1) {
+  	      var pre = m1;
+  	      // attacklab: hack around Konqueror 3.5.4 bug:
+  	      pre = pre.replace(/^  /mg, '¨0');
+  	      pre = pre.replace(/¨0/g, '');
+  	      return pre;
+  	    });
+
+  	    return showdown.subParser('hashBlock')('<blockquote>\n' + bq + '\n</blockquote>', options, globals);
+  	  });
+
+  	  text = globals.converter._dispatch('blockQuotes.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Process Markdown `<pre><code>` blocks.
+  	 */
+  	showdown.subParser('codeBlocks', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('codeBlocks.before', text, options, globals);
+
+  	  // sentinel workarounds for lack of \A and \Z, safari\khtml bug
+  	  text += '¨0';
+
+  	  var pattern = /(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=¨0))/g;
+  	  text = text.replace(pattern, function (wholeMatch, m1, m2) {
+  	    var codeblock = m1,
+  	        nextChar = m2,
+  	        end = '\n';
+
+  	    codeblock = showdown.subParser('outdent')(codeblock, options, globals);
+  	    codeblock = showdown.subParser('encodeCode')(codeblock, options, globals);
+  	    codeblock = showdown.subParser('detab')(codeblock, options, globals);
+  	    codeblock = codeblock.replace(/^\n+/g, ''); // trim leading newlines
+  	    codeblock = codeblock.replace(/\n+$/g, ''); // trim trailing newlines
+
+  	    if (options.omitExtraWLInCodeBlocks) {
+  	      end = '';
+  	    }
+
+  	    codeblock = '<pre><code>' + codeblock + end + '</code></pre>';
+
+  	    return showdown.subParser('hashBlock')(codeblock, options, globals) + nextChar;
+  	  });
+
+  	  // strip sentinel
+  	  text = text.replace(/¨0/, '');
+
+  	  text = globals.converter._dispatch('codeBlocks.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 *
+  	 *   *  Backtick quotes are used for <code></code> spans.
+  	 *
+  	 *   *  You can use multiple backticks as the delimiters if you want to
+  	 *     include literal backticks in the code span. So, this input:
+  	 *
+  	 *         Just type ``foo `bar` baz`` at the prompt.
+  	 *
+  	 *       Will translate to:
+  	 *
+  	 *         <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
+  	 *
+  	 *    There's no arbitrary limit to the number of backticks you
+  	 *    can use as delimters. If you need three consecutive backticks
+  	 *    in your code, use four for delimiters, etc.
+  	 *
+  	 *  *  You can use spaces to get literal backticks at the edges:
+  	 *
+  	 *         ... type `` `bar` `` ...
+  	 *
+  	 *       Turns to:
+  	 *
+  	 *         ... type <code>`bar`</code> ...
+  	 */
+  	showdown.subParser('codeSpans', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('codeSpans.before', text, options, globals);
+
+  	  if (typeof (text) === 'undefined') {
+  	    text = '';
+  	  }
+  	  text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
+  	    function (wholeMatch, m1, m2, m3) {
+  	      var c = m3;
+  	      c = c.replace(/^([ \t]*)/g, '');	// leading whitespace
+  	      c = c.replace(/[ \t]*$/g, '');	// trailing whitespace
+  	      c = showdown.subParser('encodeCode')(c, options, globals);
+  	      c = m1 + '<code>' + c + '</code>';
+  	      c = showdown.subParser('hashHTMLSpans')(c, options, globals);
+  	      return c;
+  	    }
+  	  );
+
+  	  text = globals.converter._dispatch('codeSpans.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Create a full HTML document from the processed markdown
+  	 */
+  	showdown.subParser('completeHTMLDocument', function (text, options, globals) {
+
+  	  if (!options.completeHTMLDocument) {
+  	    return text;
+  	  }
+
+  	  text = globals.converter._dispatch('completeHTMLDocument.before', text, options, globals);
+
+  	  var doctype = 'html',
+  	      doctypeParsed = '<!DOCTYPE HTML>\n',
+  	      title = '',
+  	      charset = '<meta charset="utf-8">\n',
+  	      lang = '',
+  	      metadata = '';
+
+  	  if (typeof globals.metadata.parsed.doctype !== 'undefined') {
+  	    doctypeParsed = '<!DOCTYPE ' +  globals.metadata.parsed.doctype + '>\n';
+  	    doctype = globals.metadata.parsed.doctype.toString().toLowerCase();
+  	    if (doctype === 'html' || doctype === 'html5') {
+  	      charset = '<meta charset="utf-8">';
+  	    }
+  	  }
+
+  	  for (var meta in globals.metadata.parsed) {
+  	    if (globals.metadata.parsed.hasOwnProperty(meta)) {
+  	      switch (meta.toLowerCase()) {
+  	        case 'doctype':
+  	          break;
+
+  	        case 'title':
+  	          title = '<title>' +  globals.metadata.parsed.title + '</title>\n';
+  	          break;
+
+  	        case 'charset':
+  	          if (doctype === 'html' || doctype === 'html5') {
+  	            charset = '<meta charset="' + globals.metadata.parsed.charset + '">\n';
+  	          } else {
+  	            charset = '<meta name="charset" content="' + globals.metadata.parsed.charset + '">\n';
+  	          }
+  	          break;
+
+  	        case 'language':
+  	        case 'lang':
+  	          lang = ' lang="' + globals.metadata.parsed[meta] + '"';
+  	          metadata += '<meta name="' + meta + '" content="' + globals.metadata.parsed[meta] + '">\n';
+  	          break;
+
+  	        default:
+  	          metadata += '<meta name="' + meta + '" content="' + globals.metadata.parsed[meta] + '">\n';
+  	      }
+  	    }
+  	  }
+
+  	  text = doctypeParsed + '<html' + lang + '>\n<head>\n' + title + charset + metadata + '</head>\n<body>\n' + text.trim() + '\n</body>\n</html>';
+
+  	  text = globals.converter._dispatch('completeHTMLDocument.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Convert all tabs to spaces
+  	 */
+  	showdown.subParser('detab', function (text, options, globals) {
+  	  text = globals.converter._dispatch('detab.before', text, options, globals);
+
+  	  // expand first n-1 tabs
+  	  text = text.replace(/\t(?=\t)/g, '    '); // g_tab_width
+
+  	  // replace the nth with two sentinels
+  	  text = text.replace(/\t/g, '¨A¨B');
+
+  	  // use the sentinel to anchor our regex so it doesn't explode
+  	  text = text.replace(/¨B(.+?)¨A/g, function (wholeMatch, m1) {
+  	    var leadingText = m1,
+  	        numSpaces = 4 - leadingText.length % 4;  // g_tab_width
+
+  	    // there *must* be a better way to do this:
+  	    for (var i = 0; i < numSpaces; i++) {
+  	      leadingText += ' ';
+  	    }
+
+  	    return leadingText;
+  	  });
+
+  	  // clean up sentinels
+  	  text = text.replace(/¨A/g, '    ');  // g_tab_width
+  	  text = text.replace(/¨B/g, '');
+
+  	  text = globals.converter._dispatch('detab.after', text, options, globals);
+  	  return text;
+  	});
+
+  	showdown.subParser('ellipsis', function (text, options, globals) {
+
+  	  if (!options.ellipsis) {
+  	    return text;
+  	  }
+
+  	  text = globals.converter._dispatch('ellipsis.before', text, options, globals);
+
+  	  text = text.replace(/\.\.\./g, '…');
+
+  	  text = globals.converter._dispatch('ellipsis.after', text, options, globals);
+
+  	  return text;
+  	});
+
+  	/**
+  	 * Turn emoji codes into emojis
+  	 *
+  	 * List of supported emojis: https://github.com/showdownjs/showdown/wiki/Emojis
+  	 */
+  	showdown.subParser('emoji', function (text, options, globals) {
+
+  	  if (!options.emoji) {
+  	    return text;
+  	  }
+
+  	  text = globals.converter._dispatch('emoji.before', text, options, globals);
+
+  	  var emojiRgx = /:([\S]+?):/g;
+
+  	  text = text.replace(emojiRgx, function (wm, emojiCode) {
+  	    if (showdown.helper.emojis.hasOwnProperty(emojiCode)) {
+  	      return showdown.helper.emojis[emojiCode];
+  	    }
+  	    return wm;
+  	  });
+
+  	  text = globals.converter._dispatch('emoji.after', text, options, globals);
+
+  	  return text;
+  	});
+
+  	/**
+  	 * Smart processing for ampersands and angle brackets that need to be encoded.
+  	 */
+  	showdown.subParser('encodeAmpsAndAngles', function (text, options, globals) {
+  	  text = globals.converter._dispatch('encodeAmpsAndAngles.before', text, options, globals);
+
+  	  // Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
+  	  // http://bumppo.net/projects/amputator/
+  	  text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g, '&amp;');
+
+  	  // Encode naked <'s
+  	  text = text.replace(/<(?![a-z\/?$!])/gi, '&lt;');
+
+  	  // Encode <
+  	  text = text.replace(/</g, '&lt;');
+
+  	  // Encode >
+  	  text = text.replace(/>/g, '&gt;');
+
+  	  text = globals.converter._dispatch('encodeAmpsAndAngles.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Returns the string, with after processing the following backslash escape sequences.
+  	 *
+  	 * attacklab: The polite way to do this is with the new escapeCharacters() function:
+  	 *
+  	 *    text = escapeCharacters(text,"\\",true);
+  	 *    text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
+  	 *
+  	 * ...but we're sidestepping its use of the (slow) RegExp constructor
+  	 * as an optimization for Firefox.  This function gets called a LOT.
+  	 */
+  	showdown.subParser('encodeBackslashEscapes', function (text, options, globals) {
+  	  text = globals.converter._dispatch('encodeBackslashEscapes.before', text, options, globals);
+
+  	  text = text.replace(/\\(\\)/g, showdown.helper.escapeCharactersCallback);
+  	  text = text.replace(/\\([`*_{}\[\]()>#+.!~=|:-])/g, showdown.helper.escapeCharactersCallback);
+
+  	  text = globals.converter._dispatch('encodeBackslashEscapes.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Encode/escape certain characters inside Markdown code runs.
+  	 * The point is that in code, these characters are literals,
+  	 * and lose their special Markdown meanings.
+  	 */
+  	showdown.subParser('encodeCode', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('encodeCode.before', text, options, globals);
+
+  	  // Encode all ampersands; HTML entities are not
+  	  // entities within a Markdown code span.
+  	  text = text
+  	    .replace(/&/g, '&amp;')
+  	  // Do the angle bracket song and dance:
+  	    .replace(/</g, '&lt;')
+  	    .replace(/>/g, '&gt;')
+  	  // Now, escape characters that are magic in Markdown:
+  	    .replace(/([*_{}\[\]\\=~-])/g, showdown.helper.escapeCharactersCallback);
+
+  	  text = globals.converter._dispatch('encodeCode.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Within tags -- meaning between < and > -- encode [\ ` * _ ~ =] so they
+  	 * don't conflict with their use in Markdown for code, italics and strong.
+  	 */
+  	showdown.subParser('escapeSpecialCharsWithinTagAttributes', function (text, options, globals) {
+  	  text = globals.converter._dispatch('escapeSpecialCharsWithinTagAttributes.before', text, options, globals);
+
+  	  // Build a regex to find HTML tags.
+  	  var tags     = /<\/?[a-z\d_:-]+(?:[\s]+[\s\S]+?)?>/gi,
+  	      comments = /<!(--(?:(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>/gi;
+
+  	  text = text.replace(tags, function (wholeMatch) {
+  	    return wholeMatch
+  	      .replace(/(.)<\/?code>(?=.)/g, '$1`')
+  	      .replace(/([\\`*_~=|])/g, showdown.helper.escapeCharactersCallback);
+  	  });
+
+  	  text = text.replace(comments, function (wholeMatch) {
+  	    return wholeMatch
+  	      .replace(/([\\`*_~=|])/g, showdown.helper.escapeCharactersCallback);
+  	  });
+
+  	  text = globals.converter._dispatch('escapeSpecialCharsWithinTagAttributes.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Handle github codeblocks prior to running HashHTML so that
+  	 * HTML contained within the codeblock gets escaped properly
+  	 * Example:
+  	 * ```ruby
+  	 *     def hello_world(x)
+  	 *       puts "Hello, #{x}"
+  	 *     end
+  	 * ```
+  	 */
+  	showdown.subParser('githubCodeBlocks', function (text, options, globals) {
+
+  	  // early exit if option is not enabled
+  	  if (!options.ghCodeBlocks) {
+  	    return text;
+  	  }
+
+  	  text = globals.converter._dispatch('githubCodeBlocks.before', text, options, globals);
+
+  	  text += '¨0';
+
+  	  text = text.replace(/(?:^|\n)(?: {0,3})(```+|~~~+)(?: *)([^\s`~]*)\n([\s\S]*?)\n(?: {0,3})\1/g, function (wholeMatch, delim, language, codeblock) {
+  	    var end = (options.omitExtraWLInCodeBlocks) ? '' : '\n';
+
+  	    // First parse the github code block
+  	    codeblock = showdown.subParser('encodeCode')(codeblock, options, globals);
+  	    codeblock = showdown.subParser('detab')(codeblock, options, globals);
+  	    codeblock = codeblock.replace(/^\n+/g, ''); // trim leading newlines
+  	    codeblock = codeblock.replace(/\n+$/g, ''); // trim trailing whitespace
+
+  	    codeblock = '<pre><code' + (language ? ' class="' + language + ' language-' + language + '"' : '') + '>' + codeblock + end + '</code></pre>';
+
+  	    codeblock = showdown.subParser('hashBlock')(codeblock, options, globals);
+
+  	    // Since GHCodeblocks can be false positives, we need to
+  	    // store the primitive text and the parsed text in a global var,
+  	    // and then return a token
+  	    return '\n\n¨G' + (globals.ghCodeBlocks.push({text: wholeMatch, codeblock: codeblock}) - 1) + 'G\n\n';
+  	  });
+
+  	  // attacklab: strip sentinel
+  	  text = text.replace(/¨0/, '');
+
+  	  return globals.converter._dispatch('githubCodeBlocks.after', text, options, globals);
+  	});
+
+  	showdown.subParser('hashBlock', function (text, options, globals) {
+  	  text = globals.converter._dispatch('hashBlock.before', text, options, globals);
+  	  text = text.replace(/(^\n+|\n+$)/g, '');
+  	  text = '\n\n¨K' + (globals.gHtmlBlocks.push(text) - 1) + 'K\n\n';
+  	  text = globals.converter._dispatch('hashBlock.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Hash and escape <code> elements that should not be parsed as markdown
+  	 */
+  	showdown.subParser('hashCodeTags', function (text, options, globals) {
+  	  text = globals.converter._dispatch('hashCodeTags.before', text, options, globals);
+
+  	  var repFunc = function (wholeMatch, match, left, right) {
+  	    var codeblock = left + showdown.subParser('encodeCode')(match, options, globals) + right;
+  	    return '¨C' + (globals.gHtmlSpans.push(codeblock) - 1) + 'C';
+  	  };
+
+  	  // Hash naked <code>
+  	  text = showdown.helper.replaceRecursiveRegExp(text, repFunc, '<code\\b[^>]*>', '</code>', 'gim');
+
+  	  text = globals.converter._dispatch('hashCodeTags.after', text, options, globals);
+  	  return text;
+  	});
+
+  	showdown.subParser('hashElement', function (text, options, globals) {
+
+  	  return function (wholeMatch, m1) {
+  	    var blockText = m1;
+
+  	    // Undo double lines
+  	    blockText = blockText.replace(/\n\n/g, '\n');
+  	    blockText = blockText.replace(/^\n/, '');
+
+  	    // strip trailing blank lines
+  	    blockText = blockText.replace(/\n+$/g, '');
+
+  	    // Replace the element text with a marker ("¨KxK" where x is its key)
+  	    blockText = '\n\n¨K' + (globals.gHtmlBlocks.push(blockText) - 1) + 'K\n\n';
+
+  	    return blockText;
+  	  };
+  	});
+
+  	showdown.subParser('hashHTMLBlocks', function (text, options, globals) {
+  	  text = globals.converter._dispatch('hashHTMLBlocks.before', text, options, globals);
+
+  	  var blockTags = [
+  	        'pre',
+  	        'div',
+  	        'h1',
+  	        'h2',
+  	        'h3',
+  	        'h4',
+  	        'h5',
+  	        'h6',
+  	        'blockquote',
+  	        'table',
+  	        'dl',
+  	        'ol',
+  	        'ul',
+  	        'script',
+  	        'noscript',
+  	        'form',
+  	        'fieldset',
+  	        'iframe',
+  	        'math',
+  	        'style',
+  	        'section',
+  	        'header',
+  	        'footer',
+  	        'nav',
+  	        'article',
+  	        'aside',
+  	        'address',
+  	        'audio',
+  	        'canvas',
+  	        'figure',
+  	        'hgroup',
+  	        'output',
+  	        'video',
+  	        'p'
+  	      ],
+  	      repFunc = function (wholeMatch, match, left, right) {
+  	        var txt = wholeMatch;
+  	        // check if this html element is marked as markdown
+  	        // if so, it's contents should be parsed as markdown
+  	        if (left.search(/\bmarkdown\b/) !== -1) {
+  	          txt = left + globals.converter.makeHtml(match) + right;
+  	        }
+  	        return '\n\n¨K' + (globals.gHtmlBlocks.push(txt) - 1) + 'K\n\n';
+  	      };
+
+  	  if (options.backslashEscapesHTMLTags) {
+  	    // encode backslash escaped HTML tags
+  	    text = text.replace(/\\<(\/?[^>]+?)>/g, function (wm, inside) {
+  	      return '&lt;' + inside + '&gt;';
+  	    });
+  	  }
+
+  	  // hash HTML Blocks
+  	  for (var i = 0; i < blockTags.length; ++i) {
+
+  	    var opTagPos,
+  	        rgx1     = new RegExp('^ {0,3}(<' + blockTags[i] + '\\b[^>]*>)', 'im'),
+  	        patLeft  = '<' + blockTags[i] + '\\b[^>]*>',
+  	        patRight = '</' + blockTags[i] + '>';
+  	    // 1. Look for the first position of the first opening HTML tag in the text
+  	    while ((opTagPos = showdown.helper.regexIndexOf(text, rgx1)) !== -1) {
+
+  	      // if the HTML tag is \ escaped, we need to escape it and break
+
+
+  	      //2. Split the text in that position
+  	      var subTexts = showdown.helper.splitAtIndex(text, opTagPos),
+  	          //3. Match recursively
+  	          newSubText1 = showdown.helper.replaceRecursiveRegExp(subTexts[1], repFunc, patLeft, patRight, 'im');
+
+  	      // prevent an infinite loop
+  	      if (newSubText1 === subTexts[1]) {
+  	        break;
+  	      }
+  	      text = subTexts[0].concat(newSubText1);
+  	    }
+  	  }
+  	  // HR SPECIAL CASE
+  	  text = text.replace(/(\n {0,3}(<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,
+  	    showdown.subParser('hashElement')(text, options, globals));
+
+  	  // Special case for standalone HTML comments
+  	  text = showdown.helper.replaceRecursiveRegExp(text, function (txt) {
+  	    return '\n\n¨K' + (globals.gHtmlBlocks.push(txt) - 1) + 'K\n\n';
+  	  }, '^ {0,3}<!--', '-->', 'gm');
+
+  	  // PHP and ASP-style processor instructions (<?...?> and <%...%>)
+  	  text = text.replace(/(?:\n\n)( {0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,
+  	    showdown.subParser('hashElement')(text, options, globals));
+
+  	  text = globals.converter._dispatch('hashHTMLBlocks.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Hash span elements that should not be parsed as markdown
+  	 */
+  	showdown.subParser('hashHTMLSpans', function (text, options, globals) {
+  	  text = globals.converter._dispatch('hashHTMLSpans.before', text, options, globals);
+
+  	  function hashHTMLSpan (html) {
+  	    return '¨C' + (globals.gHtmlSpans.push(html) - 1) + 'C';
+  	  }
+
+  	  // Hash Self Closing tags
+  	  text = text.replace(/<[^>]+?\/>/gi, function (wm) {
+  	    return hashHTMLSpan(wm);
+  	  });
+
+  	  // Hash tags without properties
+  	  text = text.replace(/<([^>]+?)>[\s\S]*?<\/\1>/g, function (wm) {
+  	    return hashHTMLSpan(wm);
+  	  });
+
+  	  // Hash tags with properties
+  	  text = text.replace(/<([^>]+?)\s[^>]+?>[\s\S]*?<\/\1>/g, function (wm) {
+  	    return hashHTMLSpan(wm);
+  	  });
+
+  	  // Hash self closing tags without />
+  	  text = text.replace(/<[^>]+?>/gi, function (wm) {
+  	    return hashHTMLSpan(wm);
+  	  });
+
+  	  /*showdown.helper.matchRecursiveRegExp(text, '<code\\b[^>]*>', '</code>', 'gi');*/
+
+  	  text = globals.converter._dispatch('hashHTMLSpans.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Unhash HTML spans
+  	 */
+  	showdown.subParser('unhashHTMLSpans', function (text, options, globals) {
+  	  text = globals.converter._dispatch('unhashHTMLSpans.before', text, options, globals);
+
+  	  for (var i = 0; i < globals.gHtmlSpans.length; ++i) {
+  	    var repText = globals.gHtmlSpans[i],
+  	        // limiter to prevent infinite loop (assume 10 as limit for recurse)
+  	        limit = 0;
+
+  	    while (/¨C(\d+)C/.test(repText)) {
+  	      var num = RegExp.$1;
+  	      repText = repText.replace('¨C' + num + 'C', globals.gHtmlSpans[num]);
+  	      if (limit === 10) {
+  	        console.error('maximum nesting of 10 spans reached!!!');
+  	        break;
+  	      }
+  	      ++limit;
+  	    }
+  	    text = text.replace('¨C' + i + 'C', repText);
+  	  }
+
+  	  text = globals.converter._dispatch('unhashHTMLSpans.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Hash and escape <pre><code> elements that should not be parsed as markdown
+  	 */
+  	showdown.subParser('hashPreCodeTags', function (text, options, globals) {
+  	  text = globals.converter._dispatch('hashPreCodeTags.before', text, options, globals);
+
+  	  var repFunc = function (wholeMatch, match, left, right) {
+  	    // encode html entities
+  	    var codeblock = left + showdown.subParser('encodeCode')(match, options, globals) + right;
+  	    return '\n\n¨G' + (globals.ghCodeBlocks.push({text: wholeMatch, codeblock: codeblock}) - 1) + 'G\n\n';
+  	  };
+
+  	  // Hash <pre><code>
+  	  text = showdown.helper.replaceRecursiveRegExp(text, repFunc, '^ {0,3}<pre\\b[^>]*>\\s*<code\\b[^>]*>', '^ {0,3}</code>\\s*</pre>', 'gim');
+
+  	  text = globals.converter._dispatch('hashPreCodeTags.after', text, options, globals);
+  	  return text;
+  	});
+
+  	showdown.subParser('headers', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('headers.before', text, options, globals);
+
+  	  var headerLevelStart = (isNaN(parseInt(options.headerLevelStart))) ? 1 : parseInt(options.headerLevelStart),
+
+  	      // Set text-style headers:
+  	      //	Header 1
+  	      //	========
+  	      //
+  	      //	Header 2
+  	      //	--------
+  	      //
+  	      setextRegexH1 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n={2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n=+[ \t]*\n+/gm,
+  	      setextRegexH2 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n-{2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n-+[ \t]*\n+/gm;
+
+  	  text = text.replace(setextRegexH1, function (wholeMatch, m1) {
+
+  	    var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
+  	        hID = (options.noHeaderId) ? '' : ' id="' + headerId(m1) + '"',
+  	        hLevel = headerLevelStart,
+  	        hashBlock = '<h' + hLevel + hID + '>' + spanGamut + '</h' + hLevel + '>';
+  	    return showdown.subParser('hashBlock')(hashBlock, options, globals);
+  	  });
+
+  	  text = text.replace(setextRegexH2, function (matchFound, m1) {
+  	    var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
+  	        hID = (options.noHeaderId) ? '' : ' id="' + headerId(m1) + '"',
+  	        hLevel = headerLevelStart + 1,
+  	        hashBlock = '<h' + hLevel + hID + '>' + spanGamut + '</h' + hLevel + '>';
+  	    return showdown.subParser('hashBlock')(hashBlock, options, globals);
+  	  });
+
+  	  // atx-style headers:
+  	  //  # Header 1
+  	  //  ## Header 2
+  	  //  ## Header 2 with closing hashes ##
+  	  //  ...
+  	  //  ###### Header 6
+  	  //
+  	  var atxStyle = (options.requireSpaceBeforeHeadingText) ? /^(#{1,6})[ \t]+(.+?)[ \t]*#*\n+/gm : /^(#{1,6})[ \t]*(.+?)[ \t]*#*\n+/gm;
+
+  	  text = text.replace(atxStyle, function (wholeMatch, m1, m2) {
+  	    var hText = m2;
+  	    if (options.customizedHeaderId) {
+  	      hText = m2.replace(/\s?\{([^{]+?)}\s*$/, '');
+  	    }
+
+  	    var span = showdown.subParser('spanGamut')(hText, options, globals),
+  	        hID = (options.noHeaderId) ? '' : ' id="' + headerId(m2) + '"',
+  	        hLevel = headerLevelStart - 1 + m1.length,
+  	        header = '<h' + hLevel + hID + '>' + span + '</h' + hLevel + '>';
+
+  	    return showdown.subParser('hashBlock')(header, options, globals);
+  	  });
+
+  	  function headerId (m) {
+  	    var title,
+  	        prefix;
+
+  	    // It is separate from other options to allow combining prefix and customized
+  	    if (options.customizedHeaderId) {
+  	      var match = m.match(/\{([^{]+?)}\s*$/);
+  	      if (match && match[1]) {
+  	        m = match[1];
+  	      }
+  	    }
+
+  	    title = m;
+
+  	    // Prefix id to prevent causing inadvertent pre-existing style matches.
+  	    if (showdown.helper.isString(options.prefixHeaderId)) {
+  	      prefix = options.prefixHeaderId;
+  	    } else if (options.prefixHeaderId === true) {
+  	      prefix = 'section-';
+  	    } else {
+  	      prefix = '';
+  	    }
+
+  	    if (!options.rawPrefixHeaderId) {
+  	      title = prefix + title;
+  	    }
+
+  	    if (options.ghCompatibleHeaderId) {
+  	      title = title
+  	        .replace(/ /g, '-')
+  	        // replace previously escaped chars (&, ¨ and $)
+  	        .replace(/&amp;/g, '')
+  	        .replace(/¨T/g, '')
+  	        .replace(/¨D/g, '')
+  	        // replace rest of the chars (&~$ are repeated as they might have been escaped)
+  	        // borrowed from github's redcarpet (some they should produce similar results)
+  	        .replace(/[&+$,\/:;=?@"#{}|^¨~\[\]`\\*)(%.!'<>]/g, '')
+  	        .toLowerCase();
+  	    } else if (options.rawHeaderId) {
+  	      title = title
+  	        .replace(/ /g, '-')
+  	        // replace previously escaped chars (&, ¨ and $)
+  	        .replace(/&amp;/g, '&')
+  	        .replace(/¨T/g, '¨')
+  	        .replace(/¨D/g, '$')
+  	        // replace " and '
+  	        .replace(/["']/g, '-')
+  	        .toLowerCase();
+  	    } else {
+  	      title = title
+  	        .replace(/[^\w]/g, '')
+  	        .toLowerCase();
+  	    }
+
+  	    if (options.rawPrefixHeaderId) {
+  	      title = prefix + title;
+  	    }
+
+  	    if (globals.hashLinkCounts[title]) {
+  	      title = title + '-' + (globals.hashLinkCounts[title]++);
+  	    } else {
+  	      globals.hashLinkCounts[title] = 1;
+  	    }
+  	    return title;
+  	  }
+
+  	  text = globals.converter._dispatch('headers.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Turn Markdown link shortcuts into XHTML <a> tags.
+  	 */
+  	showdown.subParser('horizontalRule', function (text, options, globals) {
+  	  text = globals.converter._dispatch('horizontalRule.before', text, options, globals);
+
+  	  var key = showdown.subParser('hashBlock')('<hr />', options, globals);
+  	  text = text.replace(/^ {0,2}( ?-){3,}[ \t]*$/gm, key);
+  	  text = text.replace(/^ {0,2}( ?\*){3,}[ \t]*$/gm, key);
+  	  text = text.replace(/^ {0,2}( ?_){3,}[ \t]*$/gm, key);
+
+  	  text = globals.converter._dispatch('horizontalRule.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Turn Markdown image shortcuts into <img> tags.
+  	 */
+  	showdown.subParser('images', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('images.before', text, options, globals);
+
+  	  var inlineRegExp      = /!\[([^\]]*?)][ \t]*()\([ \t]?<?([\S]+?(?:\([\S]*?\)[\S]*?)?)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*(?:(["'])([^"]*?)\6)?[ \t]?\)/g,
+  	      crazyRegExp       = /!\[([^\]]*?)][ \t]*()\([ \t]?<([^>]*)>(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*(?:(?:(["'])([^"]*?)\6))?[ \t]?\)/g,
+  	      base64RegExp      = /!\[([^\]]*?)][ \t]*()\([ \t]?<?(data:.+?\/.+?;base64,[A-Za-z0-9+/=\n]+?)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*(?:(["'])([^"]*?)\6)?[ \t]?\)/g,
+  	      referenceRegExp   = /!\[([^\]]*?)] ?(?:\n *)?\[([\s\S]*?)]()()()()()/g,
+  	      refShortcutRegExp = /!\[([^\[\]]+)]()()()()()/g;
+
+  	  function writeImageTagBase64 (wholeMatch, altText, linkId, url, width, height, m5, title) {
+  	    url = url.replace(/\s/g, '');
+  	    return writeImageTag (wholeMatch, altText, linkId, url, width, height, m5, title);
+  	  }
+
+  	  function writeImageTag (wholeMatch, altText, linkId, url, width, height, m5, title) {
+
+  	    var gUrls   = globals.gUrls,
+  	        gTitles = globals.gTitles,
+  	        gDims   = globals.gDimensions;
+
+  	    linkId = linkId.toLowerCase();
+
+  	    if (!title) {
+  	      title = '';
+  	    }
+  	    // Special case for explicit empty url
+  	    if (wholeMatch.search(/\(<?\s*>? ?(['"].*['"])?\)$/m) > -1) {
+  	      url = '';
+
+  	    } else if (url === '' || url === null) {
+  	      if (linkId === '' || linkId === null) {
+  	        // lower-case and turn embedded newlines into spaces
+  	        linkId = altText.toLowerCase().replace(/ ?\n/g, ' ');
+  	      }
+  	      url = '#' + linkId;
+
+  	      if (!showdown.helper.isUndefined(gUrls[linkId])) {
+  	        url = gUrls[linkId];
+  	        if (!showdown.helper.isUndefined(gTitles[linkId])) {
+  	          title = gTitles[linkId];
+  	        }
+  	        if (!showdown.helper.isUndefined(gDims[linkId])) {
+  	          width = gDims[linkId].width;
+  	          height = gDims[linkId].height;
+  	        }
+  	      } else {
+  	        return wholeMatch;
+  	      }
+  	    }
+
+  	    altText = altText
+  	      .replace(/"/g, '&quot;')
+  	    //altText = showdown.helper.escapeCharacters(altText, '*_', false);
+  	      .replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
+  	    //url = showdown.helper.escapeCharacters(url, '*_', false);
+  	    url = url.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
+  	    var result = '<img src="' + url + '" alt="' + altText + '"';
+
+  	    if (title && showdown.helper.isString(title)) {
+  	      title = title
+  	        .replace(/"/g, '&quot;')
+  	      //title = showdown.helper.escapeCharacters(title, '*_', false);
+  	        .replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
+  	      result += ' title="' + title + '"';
+  	    }
+
+  	    if (width && height) {
+  	      width  = (width === '*') ? 'auto' : width;
+  	      height = (height === '*') ? 'auto' : height;
+
+  	      result += ' width="' + width + '"';
+  	      result += ' height="' + height + '"';
+  	    }
+
+  	    result += ' />';
+
+  	    return result;
+  	  }
+
+  	  // First, handle reference-style labeled images: ![alt text][id]
+  	  text = text.replace(referenceRegExp, writeImageTag);
+
+  	  // Next, handle inline images:  ![alt text](url =<width>x<height> "optional title")
+
+  	  // base64 encoded images
+  	  text = text.replace(base64RegExp, writeImageTagBase64);
+
+  	  // cases with crazy urls like ./image/cat1).png
+  	  text = text.replace(crazyRegExp, writeImageTag);
+
+  	  // normal cases
+  	  text = text.replace(inlineRegExp, writeImageTag);
+
+  	  // handle reference-style shortcuts: ![img text]
+  	  text = text.replace(refShortcutRegExp, writeImageTag);
+
+  	  text = globals.converter._dispatch('images.after', text, options, globals);
+  	  return text;
+  	});
+
+  	showdown.subParser('italicsAndBold', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('italicsAndBold.before', text, options, globals);
+
+  	  // it's faster to have 3 separate regexes for each case than have just one
+  	  // because of backtracing, in some cases, it could lead to an exponential effect
+  	  // called "catastrophic backtrace". Ominous!
+
+  	  function parseInside (txt, left, right) {
+  	    /*
+  	    if (options.simplifiedAutoLink) {
+  	      txt = showdown.subParser('simplifiedAutoLinks')(txt, options, globals);
+  	    }
+  	    */
+  	    return left + txt + right;
+  	  }
+
+  	  // Parse underscores
+  	  if (options.literalMidWordUnderscores) {
+  	    text = text.replace(/\b___(\S[\s\S]*?)___\b/g, function (wm, txt) {
+  	      return parseInside (txt, '<strong><em>', '</em></strong>');
+  	    });
+  	    text = text.replace(/\b__(\S[\s\S]*?)__\b/g, function (wm, txt) {
+  	      return parseInside (txt, '<strong>', '</strong>');
+  	    });
+  	    text = text.replace(/\b_(\S[\s\S]*?)_\b/g, function (wm, txt) {
+  	      return parseInside (txt, '<em>', '</em>');
+  	    });
+  	  } else {
+  	    text = text.replace(/___(\S[\s\S]*?)___/g, function (wm, m) {
+  	      return (/\S$/.test(m)) ? parseInside (m, '<strong><em>', '</em></strong>') : wm;
+  	    });
+  	    text = text.replace(/__(\S[\s\S]*?)__/g, function (wm, m) {
+  	      return (/\S$/.test(m)) ? parseInside (m, '<strong>', '</strong>') : wm;
+  	    });
+  	    text = text.replace(/_([^\s_][\s\S]*?)_/g, function (wm, m) {
+  	      // !/^_[^_]/.test(m) - test if it doesn't start with __ (since it seems redundant, we removed it)
+  	      return (/\S$/.test(m)) ? parseInside (m, '<em>', '</em>') : wm;
+  	    });
+  	  }
+
+  	  // Now parse asterisks
+  	  if (options.literalMidWordAsterisks) {
+  	    text = text.replace(/([^*]|^)\B\*\*\*(\S[\s\S]*?)\*\*\*\B(?!\*)/g, function (wm, lead, txt) {
+  	      return parseInside (txt, lead + '<strong><em>', '</em></strong>');
+  	    });
+  	    text = text.replace(/([^*]|^)\B\*\*(\S[\s\S]*?)\*\*\B(?!\*)/g, function (wm, lead, txt) {
+  	      return parseInside (txt, lead + '<strong>', '</strong>');
+  	    });
+  	    text = text.replace(/([^*]|^)\B\*(\S[\s\S]*?)\*\B(?!\*)/g, function (wm, lead, txt) {
+  	      return parseInside (txt, lead + '<em>', '</em>');
+  	    });
+  	  } else {
+  	    text = text.replace(/\*\*\*(\S[\s\S]*?)\*\*\*/g, function (wm, m) {
+  	      return (/\S$/.test(m)) ? parseInside (m, '<strong><em>', '</em></strong>') : wm;
+  	    });
+  	    text = text.replace(/\*\*(\S[\s\S]*?)\*\*/g, function (wm, m) {
+  	      return (/\S$/.test(m)) ? parseInside (m, '<strong>', '</strong>') : wm;
+  	    });
+  	    text = text.replace(/\*([^\s*][\s\S]*?)\*/g, function (wm, m) {
+  	      // !/^\*[^*]/.test(m) - test if it doesn't start with ** (since it seems redundant, we removed it)
+  	      return (/\S$/.test(m)) ? parseInside (m, '<em>', '</em>') : wm;
+  	    });
+  	  }
+
+
+  	  text = globals.converter._dispatch('italicsAndBold.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Form HTML ordered (numbered) and unordered (bulleted) lists.
+  	 */
+  	showdown.subParser('lists', function (text, options, globals) {
+
+  	  /**
+  	   * Process the contents of a single ordered or unordered list, splitting it
+  	   * into individual list items.
+  	   * @param {string} listStr
+  	   * @param {boolean} trimTrailing
+  	   * @returns {string}
+  	   */
+  	  function processListItems (listStr, trimTrailing) {
+  	    // The $g_list_level global keeps track of when we're inside a list.
+  	    // Each time we enter a list, we increment it; when we leave a list,
+  	    // we decrement. If it's zero, we're not in a list anymore.
+  	    //
+  	    // We do this because when we're not inside a list, we want to treat
+  	    // something like this:
+  	    //
+  	    //    I recommend upgrading to version
+  	    //    8. Oops, now this line is treated
+  	    //    as a sub-list.
+  	    //
+  	    // As a single paragraph, despite the fact that the second line starts
+  	    // with a digit-period-space sequence.
+  	    //
+  	    // Whereas when we're inside a list (or sub-list), that line will be
+  	    // treated as the start of a sub-list. What a kludge, huh? This is
+  	    // an aspect of Markdown's syntax that's hard to parse perfectly
+  	    // without resorting to mind-reading. Perhaps the solution is to
+  	    // change the syntax rules such that sub-lists must start with a
+  	    // starting cardinal number; e.g. "1." or "a.".
+  	    globals.gListLevel++;
+
+  	    // trim trailing blank lines:
+  	    listStr = listStr.replace(/\n{2,}$/, '\n');
+
+  	    // attacklab: add sentinel to emulate \z
+  	    listStr += '¨0';
+
+  	    var rgx = /(\n)?(^ {0,3})([*+-]|\d+[.])[ \t]+((\[(x|X| )?])?[ \t]*[^\r]+?(\n{1,2}))(?=\n*(¨0| {0,3}([*+-]|\d+[.])[ \t]+))/gm,
+  	        isParagraphed = (/\n[ \t]*\n(?!¨0)/.test(listStr));
+
+  	    // Since version 1.5, nesting sublists requires 4 spaces (or 1 tab) indentation,
+  	    // which is a syntax breaking change
+  	    // activating this option reverts to old behavior
+  	    if (options.disableForced4SpacesIndentedSublists) {
+  	      rgx = /(\n)?(^ {0,3})([*+-]|\d+[.])[ \t]+((\[(x|X| )?])?[ \t]*[^\r]+?(\n{1,2}))(?=\n*(¨0|\2([*+-]|\d+[.])[ \t]+))/gm;
+  	    }
+
+  	    listStr = listStr.replace(rgx, function (wholeMatch, m1, m2, m3, m4, taskbtn, checked) {
+  	      checked = (checked && checked.trim() !== '');
+
+  	      var item = showdown.subParser('outdent')(m4, options, globals),
+  	          bulletStyle = '';
+
+  	      // Support for github tasklists
+  	      if (taskbtn && options.tasklists) {
+  	        bulletStyle = ' class="task-list-item" style="list-style-type: none;"';
+  	        item = item.replace(/^[ \t]*\[(x|X| )?]/m, function () {
+  	          var otp = '<input type="checkbox" disabled style="margin: 0px 0.35em 0.25em -1.6em; vertical-align: middle;"';
+  	          if (checked) {
+  	            otp += ' checked';
+  	          }
+  	          otp += '>';
+  	          return otp;
+  	        });
+  	      }
+
+  	      // ISSUE #312
+  	      // This input: - - - a
+  	      // causes trouble to the parser, since it interprets it as:
+  	      // <ul><li><li><li>a</li></li></li></ul>
+  	      // instead of:
+  	      // <ul><li>- - a</li></ul>
+  	      // So, to prevent it, we will put a marker (¨A)in the beginning of the line
+  	      // Kind of hackish/monkey patching, but seems more effective than overcomplicating the list parser
+  	      item = item.replace(/^([-*+]|\d\.)[ \t]+[\S\n ]*/g, function (wm2) {
+  	        return '¨A' + wm2;
+  	      });
+
+  	      // m1 - Leading line or
+  	      // Has a double return (multi paragraph) or
+  	      // Has sublist
+  	      if (m1 || (item.search(/\n{2,}/) > -1)) {
+  	        item = showdown.subParser('githubCodeBlocks')(item, options, globals);
+  	        item = showdown.subParser('blockGamut')(item, options, globals);
+  	      } else {
+  	        // Recursion for sub-lists:
+  	        item = showdown.subParser('lists')(item, options, globals);
+  	        item = item.replace(/\n$/, ''); // chomp(item)
+  	        item = showdown.subParser('hashHTMLBlocks')(item, options, globals);
+
+  	        // Colapse double linebreaks
+  	        item = item.replace(/\n\n+/g, '\n\n');
+  	        if (isParagraphed) {
+  	          item = showdown.subParser('paragraphs')(item, options, globals);
+  	        } else {
+  	          item = showdown.subParser('spanGamut')(item, options, globals);
+  	        }
+  	      }
+
+  	      // now we need to remove the marker (¨A)
+  	      item = item.replace('¨A', '');
+  	      // we can finally wrap the line in list item tags
+  	      item =  '<li' + bulletStyle + '>' + item + '</li>\n';
+
+  	      return item;
+  	    });
+
+  	    // attacklab: strip sentinel
+  	    listStr = listStr.replace(/¨0/g, '');
+
+  	    globals.gListLevel--;
+
+  	    if (trimTrailing) {
+  	      listStr = listStr.replace(/\s+$/, '');
+  	    }
+
+  	    return listStr;
+  	  }
+
+  	  function styleStartNumber (list, listType) {
+  	    // check if ol and starts by a number different than 1
+  	    if (listType === 'ol') {
+  	      var res = list.match(/^ *(\d+)\./);
+  	      if (res && res[1] !== '1') {
+  	        return ' start="' + res[1] + '"';
+  	      }
+  	    }
+  	    return '';
+  	  }
+
+  	  /**
+  	   * Check and parse consecutive lists (better fix for issue #142)
+  	   * @param {string} list
+  	   * @param {string} listType
+  	   * @param {boolean} trimTrailing
+  	   * @returns {string}
+  	   */
+  	  function parseConsecutiveLists (list, listType, trimTrailing) {
+  	    // check if we caught 2 or more consecutive lists by mistake
+  	    // we use the counterRgx, meaning if listType is UL we look for OL and vice versa
+  	    var olRgx = (options.disableForced4SpacesIndentedSublists) ? /^ ?\d+\.[ \t]/gm : /^ {0,3}\d+\.[ \t]/gm,
+  	        ulRgx = (options.disableForced4SpacesIndentedSublists) ? /^ ?[*+-][ \t]/gm : /^ {0,3}[*+-][ \t]/gm,
+  	        counterRxg = (listType === 'ul') ? olRgx : ulRgx,
+  	        result = '';
+
+  	    if (list.search(counterRxg) !== -1) {
+  	      (function parseCL (txt) {
+  	        var pos = txt.search(counterRxg),
+  	            style = styleStartNumber(list, listType);
+  	        if (pos !== -1) {
+  	          // slice
+  	          result += '\n\n<' + listType + style + '>\n' + processListItems(txt.slice(0, pos), !!trimTrailing) + '</' + listType + '>\n';
+
+  	          // invert counterType and listType
+  	          listType = (listType === 'ul') ? 'ol' : 'ul';
+  	          counterRxg = (listType === 'ul') ? olRgx : ulRgx;
+
+  	          //recurse
+  	          parseCL(txt.slice(pos));
+  	        } else {
+  	          result += '\n\n<' + listType + style + '>\n' + processListItems(txt, !!trimTrailing) + '</' + listType + '>\n';
+  	        }
+  	      })(list);
+  	    } else {
+  	      var style = styleStartNumber(list, listType);
+  	      result = '\n\n<' + listType + style + '>\n' + processListItems(list, !!trimTrailing) + '</' + listType + '>\n';
+  	    }
+
+  	    return result;
+  	  }
+
+  	  /** Start of list parsing **/
+  	  text = globals.converter._dispatch('lists.before', text, options, globals);
+  	  // add sentinel to hack around khtml/safari bug:
+  	  // http://bugs.webkit.org/show_bug.cgi?id=11231
+  	  text += '¨0';
+
+  	  if (globals.gListLevel) {
+  	    text = text.replace(/^(( {0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(¨0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm,
+  	      function (wholeMatch, list, m2) {
+  	        var listType = (m2.search(/[*+-]/g) > -1) ? 'ul' : 'ol';
+  	        return parseConsecutiveLists(list, listType, true);
+  	      }
+  	    );
+  	  } else {
+  	    text = text.replace(/(\n\n|^\n?)(( {0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(¨0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm,
+  	      function (wholeMatch, m1, list, m3) {
+  	        var listType = (m3.search(/[*+-]/g) > -1) ? 'ul' : 'ol';
+  	        return parseConsecutiveLists(list, listType, false);
+  	      }
+  	    );
+  	  }
+
+  	  // strip sentinel
+  	  text = text.replace(/¨0/, '');
+  	  text = globals.converter._dispatch('lists.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 * Parse metadata at the top of the document
+  	 */
+  	showdown.subParser('metadata', function (text, options, globals) {
+
+  	  if (!options.metadata) {
+  	    return text;
+  	  }
+
+  	  text = globals.converter._dispatch('metadata.before', text, options, globals);
+
+  	  function parseMetadataContents (content) {
+  	    // raw is raw so it's not changed in any way
+  	    globals.metadata.raw = content;
+
+  	    // escape chars forbidden in html attributes
+  	    // double quotes
+  	    content = content
+  	      // ampersand first
+  	      .replace(/&/g, '&amp;')
+  	      // double quotes
+  	      .replace(/"/g, '&quot;');
+
+  	    content = content.replace(/\n {4}/g, ' ');
+  	    content.replace(/^([\S ]+): +([\s\S]+?)$/gm, function (wm, key, value) {
+  	      globals.metadata.parsed[key] = value;
+  	      return '';
+  	    });
+  	  }
+
+  	  text = text.replace(/^\s*«««+(\S*?)\n([\s\S]+?)\n»»»+\n/, function (wholematch, format, content) {
+  	    parseMetadataContents(content);
+  	    return '¨M';
+  	  });
 
-  const CLASS_PATTERN = /^class[ {]/;
+  	  text = text.replace(/^\s*---+(\S*?)\n([\s\S]+?)\n---+\n/, function (wholematch, format, content) {
+  	    if (format) {
+  	      globals.metadata.format = format;
+  	    }
+  	    parseMetadataContents(content);
+  	    return '¨M';
+  	  });
 
+  	  text = text.replace(/¨M/g, '');
 
-  /**
-   * @param {function} fn
-   *
-   * @return {boolean}
-   */
-  function isClass(fn) {
-    return CLASS_PATTERN.test(fn.toString());
-  }
+  	  text = globals.converter._dispatch('metadata.after', text, options, globals);
+  	  return text;
+  	});
 
-  /**
-   * @param {any} obj
-   *
-   * @return {boolean}
-   */
-  function isArray(obj) {
-    return Array.isArray(obj);
-  }
+  	/**
+  	 * Remove one level of line-leading tabs or spaces
+  	 */
+  	showdown.subParser('outdent', function (text, options, globals) {
+  	  text = globals.converter._dispatch('outdent.before', text, options, globals);
 
-  /**
-   * @param {any} obj
-   * @param {string} prop
-   *
-   * @return {boolean}
-   */
-  function hasOwnProp(obj, prop) {
-    return Object.prototype.hasOwnProperty.call(obj, prop);
-  }
+  	  // attacklab: hack around Konqueror 3.5.4 bug:
+  	  // "----------bug".replace(/^-/g,"") == "bug"
+  	  text = text.replace(/^(\t|[ ]{1,4})/gm, '¨0'); // attacklab: g_tab_width
 
-  /**
-   * @typedef {import('./index').InjectAnnotated } InjectAnnotated
-   */
+  	  // attacklab: clean up hack
+  	  text = text.replace(/¨0/g, '');
 
-  /**
-   * @template T
-   *
-   * @params {[...string[], T] | ...string[], T} args
-   *
-   * @return {T & InjectAnnotated}
-   */
-  function annotate(...args) {
+  	  text = globals.converter._dispatch('outdent.after', text, options, globals);
+  	  return text;
+  	});
+
+  	/**
+  	 *
+  	 */
+  	showdown.subParser('paragraphs', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('paragraphs.before', text, options, globals);
+  	  // Strip leading and trailing lines:
+  	  text = text.replace(/^\n+/g, '');
+  	  text = text.replace(/\n+$/g, '');
+
+  	  var grafs = text.split(/\n{2,}/g),
+  	      grafsOut = [],
+  	      end = grafs.length; // Wrap <p> tags
+
+  	  for (var i = 0; i < end; i++) {
+  	    var str = grafs[i];
+  	    // if this is an HTML marker, copy it
+  	    if (str.search(/¨(K|G)(\d+)\1/g) >= 0) {
+  	      grafsOut.push(str);
+
+  	    // test for presence of characters to prevent empty lines being parsed
+  	    // as paragraphs (resulting in undesired extra empty paragraphs)
+  	    } else if (str.search(/\S/) >= 0) {
+  	      str = showdown.subParser('spanGamut')(str, options, globals);
+  	      str = str.replace(/^([ \t]*)/g, '<p>');
+  	      str += '</p>';
+  	      grafsOut.push(str);
+  	    }
+  	  }
+
+  	  /** Unhashify HTML blocks */
+  	  end = grafsOut.length;
+  	  for (i = 0; i < end; i++) {
+  	    var blockText = '',
+  	        grafsOutIt = grafsOut[i],
+  	        codeFlag = false;
+  	    // if this is a marker for an html block...
+  	    // use RegExp.test instead of string.search because of QML bug
+  	    while (/¨(K|G)(\d+)\1/.test(grafsOutIt)) {
+  	      var delim = RegExp.$1,
+  	          num   = RegExp.$2;
+
+  	      if (delim === 'K') {
+  	        blockText = globals.gHtmlBlocks[num];
+  	      } else {
+  	        // we need to check if ghBlock is a false positive
+  	        if (codeFlag) {
+  	          // use encoded version of all text
+  	          blockText = showdown.subParser('encodeCode')(globals.ghCodeBlocks[num].text, options, globals);
+  	        } else {
+  	          blockText = globals.ghCodeBlocks[num].codeblock;
+  	        }
+  	      }
+  	      blockText = blockText.replace(/\$/g, '$$$$'); // Escape any dollar signs
+
+  	      grafsOutIt = grafsOutIt.replace(/(\n\n)?¨(K|G)\d+\2(\n\n)?/, blockText);
+  	      // Check if grafsOutIt is a pre->code
+  	      if (/^<pre\b[^>]*>\s*<code\b[^>]*>/.test(grafsOutIt)) {
+  	        codeFlag = true;
+  	      }
+  	    }
+  	    grafsOut[i] = grafsOutIt;
+  	  }
+  	  text = grafsOut.join('\n');
+  	  // Strip leading and trailing lines:
+  	  text = text.replace(/^\n+/g, '');
+  	  text = text.replace(/\n+$/g, '');
+  	  return globals.converter._dispatch('paragraphs.after', text, options, globals);
+  	});
+
+  	/**
+  	 * Run extension
+  	 */
+  	showdown.subParser('runExtension', function (ext, text, options, globals) {
+
+  	  if (ext.filter) {
+  	    text = ext.filter(text, globals.converter, options);
+
+  	  } else if (ext.regex) {
+  	    // TODO remove this when old extension loading mechanism is deprecated
+  	    var re = ext.regex;
+  	    if (!(re instanceof RegExp)) {
+  	      re = new RegExp(re, 'g');
+  	    }
+  	    text = text.replace(re, ext.replace);
+  	  }
+
+  	  return text;
+  	});
+
+  	/**
+  	 * These are all the transformations that occur *within* block-level
+  	 * tags like paragraphs, headers, and list items.
+  	 */
+  	showdown.subParser('spanGamut', function (text, options, globals) {
+
+  	  text = globals.converter._dispatch('spanGamut.before', text, options, globals);
+  	  text = showdown.subParser('codeSpans')(text, options, globals);
+  	  text = showdown.subParser('escapeSpecialCharsWithinTagAttributes')(text, options, globals);
+  	  text = showdown.subParser('encodeBackslashEscapes')(text, options, globals);
+
+  	  // Process anchor and image tags. Images must come first,
+  	  // because ![foo][f] looks like an anchor.
+  	  text = showdown.subParser('images')(text, options, globals);
+  	  text = showdown.subParser('anchors')(text, options, globals);
+
+  	  // Make links out of things like `<http://example.com/>`
+  	  // Must come after anchors, because you can use < and >
+  	  // delimiters in inline links like [this](<url>).
+  	  text = showdown.subParser('autoLinks')(text, options, globals);
+  	  text = showdown.subParser('simplifiedAutoLinks')(text, options, globals);
+  	  text = showdown.subParser('emoji')(text, options, globals);
+  	  text = showdown.subParser('underline')(text, options, globals);
+  	  text = showdown.subParser('italicsAndBold')(text, options, globals);
+  	  text = showdown.subParser('strikethrough')(text, options, globals);
+  	  text = showdown.subParser('ellipsis')(text, options, globals);
+
+  	  // we need to hash HTML tags inside spans
+  	  text = showdown.subParser('hashHTMLSpans')(text, options, globals);
+
+  	  // now we encode amps and angles
+  	  text = showdown.subParser('encodeAmpsAndAngles')(text, options, globals);
+
+  	  // Do hard breaks
+  	  if (options.simpleLineBreaks) {
+  	    // GFM style hard breaks
+  	    // only add line breaks if the text does not contain a block (special case for lists)
+  	    if (!/\n\n¨K/.test(text)) {
+  	      text = text.replace(/\n+/g, '<br />\n');
+  	    }
+  	  } else {
+  	    // Vanilla hard breaks
+  	    text = text.replace(/  +\n/g, '<br />\n');
+  	  }
+
+  	  text = globals.converter._dispatch('spanGamut.after', text, options, globals);
+  	  return text;
+  	});
+
+  	showdown.subParser('strikethrough', function (text, options, globals) {
+
+  	  function parseInside (txt) {
+  	    if (options.simplifiedAutoLink) {
+  	      txt = showdown.subParser('simplifiedAutoLinks')(txt, options, globals);
+  	    }
+  	    return '<del>' + txt + '</del>';
+  	  }
+
+  	  if (options.strikethrough) {
+  	    text = globals.converter._dispatch('strikethrough.before', text, options, globals);
+  	    text = text.replace(/(?:~){2}([\s\S]+?)(?:~){2}/g, function (wm, txt) { return parseInside(txt); });
+  	    text = globals.converter._dispatch('strikethrough.after', text, options, globals);
+  	  }
+
+  	  return text;
+  	});
+
+  	/**
+  	 * Strips link definitions from text, stores the URLs and titles in
+  	 * hash references.
+  	 * Link defs are in the form: ^[id]: url "optional title"
+  	 */
+  	showdown.subParser('stripLinkDefinitions', function (text, options, globals) {
+
+  	  var regex       = /^ {0,3}\[([^\]]+)]:[ \t]*\n?[ \t]*<?([^>\s]+)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*\n?[ \t]*(?:(\n*)["|'(](.+?)["|')][ \t]*)?(?:\n+|(?=¨0))/gm,
+  	      base64Regex = /^ {0,3}\[([^\]]+)]:[ \t]*\n?[ \t]*<?(data:.+?\/.+?;base64,[A-Za-z0-9+/=\n]+?)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*\n?[ \t]*(?:(\n*)["|'(](.+?)["|')][ \t]*)?(?:\n\n|(?=¨0)|(?=\n\[))/gm;
+
+  	  // attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
+  	  text += '¨0';
+
+  	  var replaceFunc = function (wholeMatch, linkId, url, width, height, blankLines, title) {
+
+  	    // if there aren't two instances of linkId it must not be a reference link so back out
+  	    linkId = linkId.toLowerCase();
+  	    if (text.toLowerCase().split(linkId).length - 1 < 2) {
+  	      return wholeMatch;
+  	    }
+  	    if (url.match(/^data:.+?\/.+?;base64,/)) {
+  	      // remove newlines
+  	      globals.gUrls[linkId] = url.replace(/\s/g, '');
+  	    } else {
+  	      globals.gUrls[linkId] = showdown.subParser('encodeAmpsAndAngles')(url, options, globals);  // Link IDs are case-insensitive
+  	    }
+
+  	    if (blankLines) {
+  	      // Oops, found blank lines, so it's not a title.
+  	      // Put back the parenthetical statement we stole.
+  	      return blankLines + title;
+
+  	    } else {
+  	      if (title) {
+  	        globals.gTitles[linkId] = title.replace(/"|'/g, '&quot;');
+  	      }
+  	      if (options.parseImgDimensions && width && height) {
+  	        globals.gDimensions[linkId] = {
+  	          width:  width,
+  	          height: height
+  	        };
+  	      }
+  	    }
+  	    // Completely remove the definition from the text
+  	    return '';
+  	  };
+
+  	  // first we try to find base64 link references
+  	  text = text.replace(base64Regex, replaceFunc);
+
+  	  text = text.replace(regex, replaceFunc);
+
+  	  // attacklab: strip sentinel
+  	  text = text.replace(/¨0/, '');
+
+  	  return text;
+  	});
+
+  	showdown.subParser('tables', function (text, options, globals) {
+
+  	  if (!options.tables) {
+  	    return text;
+  	  }
+
+  	  var tableRgx       = /^ {0,3}\|?.+\|.+\n {0,3}\|?[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*:?[ \t]*(?:[-=]){2,}[\s\S]+?(?:\n\n|¨0)/gm,
+  	      //singeColTblRgx = /^ {0,3}\|.+\|\n {0,3}\|[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*\n(?: {0,3}\|.+\|\n)+(?:\n\n|¨0)/gm;
+  	      singeColTblRgx = /^ {0,3}\|.+\|[ \t]*\n {0,3}\|[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*\n( {0,3}\|.+\|[ \t]*\n)*(?:\n|¨0)/gm;
+
+  	  function parseStyles (sLine) {
+  	    if (/^:[ \t]*--*$/.test(sLine)) {
+  	      return ' style="text-align:left;"';
+  	    } else if (/^--*[ \t]*:[ \t]*$/.test(sLine)) {
+  	      return ' style="text-align:right;"';
+  	    } else if (/^:[ \t]*--*[ \t]*:$/.test(sLine)) {
+  	      return ' style="text-align:center;"';
+  	    } else {
+  	      return '';
+  	    }
+  	  }
+
+  	  function parseHeaders (header, style) {
+  	    var id = '';
+  	    header = header.trim();
+  	    // support both tablesHeaderId and tableHeaderId due to error in documentation so we don't break backwards compatibility
+  	    if (options.tablesHeaderId || options.tableHeaderId) {
+  	      id = ' id="' + header.replace(/ /g, '_').toLowerCase() + '"';
+  	    }
+  	    header = showdown.subParser('spanGamut')(header, options, globals);
+
+  	    return '<th' + id + style + '>' + header + '</th>\n';
+  	  }
+
+  	  function parseCells (cell, style) {
+  	    var subText = showdown.subParser('spanGamut')(cell, options, globals);
+  	    return '<td' + style + '>' + subText + '</td>\n';
+  	  }
+
+  	  function buildTable (headers, cells) {
+  	    var tb = '<table>\n<thead>\n<tr>\n',
+  	        tblLgn = headers.length;
+
+  	    for (var i = 0; i < tblLgn; ++i) {
+  	      tb += headers[i];
+  	    }
+  	    tb += '</tr>\n</thead>\n<tbody>\n';
+
+  	    for (i = 0; i < cells.length; ++i) {
+  	      tb += '<tr>\n';
+  	      for (var ii = 0; ii < tblLgn; ++ii) {
+  	        tb += cells[i][ii];
+  	      }
+  	      tb += '</tr>\n';
+  	    }
+  	    tb += '</tbody>\n</table>\n';
+  	    return tb;
+  	  }
+
+  	  function parseTable (rawTable) {
+  	    var i, tableLines = rawTable.split('\n');
+
+  	    for (i = 0; i < tableLines.length; ++i) {
+  	      // strip wrong first and last column if wrapped tables are used
+  	      if (/^ {0,3}\|/.test(tableLines[i])) {
+  	        tableLines[i] = tableLines[i].replace(/^ {0,3}\|/, '');
+  	      }
+  	      if (/\|[ \t]*$/.test(tableLines[i])) {
+  	        tableLines[i] = tableLines[i].replace(/\|[ \t]*$/, '');
+  	      }
+  	      // parse code spans first, but we only support one line code spans
+  	      tableLines[i] = showdown.subParser('codeSpans')(tableLines[i], options, globals);
+  	    }
+
+  	    var rawHeaders = tableLines[0].split('|').map(function (s) { return s.trim();}),
+  	        rawStyles = tableLines[1].split('|').map(function (s) { return s.trim();}),
+  	        rawCells = [],
+  	        headers = [],
+  	        styles = [],
+  	        cells = [];
+
+  	    tableLines.shift();
+  	    tableLines.shift();
+
+  	    for (i = 0; i < tableLines.length; ++i) {
+  	      if (tableLines[i].trim() === '') {
+  	        continue;
+  	      }
+  	      rawCells.push(
+  	        tableLines[i]
+  	          .split('|')
+  	          .map(function (s) {
+  	            return s.trim();
+  	          })
+  	      );
+  	    }
+
+  	    if (rawHeaders.length < rawStyles.length) {
+  	      return rawTable;
+  	    }
+
+  	    for (i = 0; i < rawStyles.length; ++i) {
+  	      styles.push(parseStyles(rawStyles[i]));
+  	    }
+
+  	    for (i = 0; i < rawHeaders.length; ++i) {
+  	      if (showdown.helper.isUndefined(styles[i])) {
+  	        styles[i] = '';
+  	      }
+  	      headers.push(parseHeaders(rawHeaders[i], styles[i]));
+  	    }
+
+  	    for (i = 0; i < rawCells.length; ++i) {
+  	      var row = [];
+  	      for (var ii = 0; ii < headers.length; ++ii) {
+  	        if (showdown.helper.isUndefined(rawCells[i][ii])) ;
+  	        row.push(parseCells(rawCells[i][ii], styles[ii]));
+  	      }
+  	      cells.push(row);
+  	    }
+
+  	    return buildTable(headers, cells);
+  	  }
+
+  	  text = globals.converter._dispatch('tables.before', text, options, globals);
+
+  	  // find escaped pipe characters
+  	  text = text.replace(/\\(\|)/g, showdown.helper.escapeCharactersCallback);
+
+  	  // parse multi column tables
+  	  text = text.replace(tableRgx, parseTable);
+
+  	  // parse one column tables
+  	  text = text.replace(singeColTblRgx, parseTable);
+
+  	  text = globals.converter._dispatch('tables.after', text, options, globals);
+
+  	  return text;
+  	});
+
+  	showdown.subParser('underline', function (text, options, globals) {
+
+  	  if (!options.underline) {
+  	    return text;
+  	  }
+
+  	  text = globals.converter._dispatch('underline.before', text, options, globals);
+
+  	  if (options.literalMidWordUnderscores) {
+  	    text = text.replace(/\b___(\S[\s\S]*?)___\b/g, function (wm, txt) {
+  	      return '<u>' + txt + '</u>';
+  	    });
+  	    text = text.replace(/\b__(\S[\s\S]*?)__\b/g, function (wm, txt) {
+  	      return '<u>' + txt + '</u>';
+  	    });
+  	  } else {
+  	    text = text.replace(/___(\S[\s\S]*?)___/g, function (wm, m) {
+  	      return (/\S$/.test(m)) ? '<u>' + m + '</u>' : wm;
+  	    });
+  	    text = text.replace(/__(\S[\s\S]*?)__/g, function (wm, m) {
+  	      return (/\S$/.test(m)) ? '<u>' + m + '</u>' : wm;
+  	    });
+  	  }
+
+  	  // escape remaining underscores to prevent them being parsed by italic and bold
+  	  text = text.replace(/(_)/g, showdown.helper.escapeCharactersCallback);
+
+  	  text = globals.converter._dispatch('underline.after', text, options, globals);
+
+  	  return text;
+  	});
+
+  	/**
+  	 * Swap back in all the special characters we've hidden.
+  	 */
+  	showdown.subParser('unescapeSpecialChars', function (text, options, globals) {
+  	  text = globals.converter._dispatch('unescapeSpecialChars.before', text, options, globals);
+
+  	  text = text.replace(/¨E(\d+)E/g, function (wholeMatch, m1) {
+  	    var charCodeToReplace = parseInt(m1);
+  	    return String.fromCharCode(charCodeToReplace);
+  	  });
+
+  	  text = globals.converter._dispatch('unescapeSpecialChars.after', text, options, globals);
+  	  return text;
+  	});
+
+  	showdown.subParser('makeMarkdown.blockquote', function (node, globals) {
+
+  	  var txt = '';
+  	  if (node.hasChildNodes()) {
+  	    var children = node.childNodes,
+  	        childrenLength = children.length;
+
+  	    for (var i = 0; i < childrenLength; ++i) {
+  	      var innerTxt = showdown.subParser('makeMarkdown.node')(children[i], globals);
+
+  	      if (innerTxt === '') {
+  	        continue;
+  	      }
+  	      txt += innerTxt;
+  	    }
+  	  }
+  	  // cleanup
+  	  txt = txt.trim();
+  	  txt = '> ' + txt.split('\n').join('\n> ');
+  	  return txt;
+  	});
+
+  	showdown.subParser('makeMarkdown.codeBlock', function (node, globals) {
+
+  	  var lang = node.getAttribute('language'),
+  	      num  = node.getAttribute('precodenum');
+  	  return '```' + lang + '\n' + globals.preList[num] + '\n```';
+  	});
+
+  	showdown.subParser('makeMarkdown.codeSpan', function (node) {
+
+  	  return '`' + node.innerHTML + '`';
+  	});
+
+  	showdown.subParser('makeMarkdown.emphasis', function (node, globals) {
+
+  	  var txt = '';
+  	  if (node.hasChildNodes()) {
+  	    txt += '*';
+  	    var children = node.childNodes,
+  	        childrenLength = children.length;
+  	    for (var i = 0; i < childrenLength; ++i) {
+  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
+  	    }
+  	    txt += '*';
+  	  }
+  	  return txt;
+  	});
 
-    if (args.length === 1 && isArray(args[0])) {
-      args = args[0];
-    }
+  	showdown.subParser('makeMarkdown.header', function (node, globals, headerLevel) {
 
-    args = [ ...args ];
+  	  var headerMark = new Array(headerLevel + 1).join('#'),
+  	      txt = '';
 
-    const fn = args.pop();
+  	  if (node.hasChildNodes()) {
+  	    txt = headerMark + ' ';
+  	    var children = node.childNodes,
+  	        childrenLength = children.length;
 
-    fn.$inject = args;
+  	    for (var i = 0; i < childrenLength; ++i) {
+  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
+  	    }
+  	  }
+  	  return txt;
+  	});
 
-    return fn;
-  }
+  	showdown.subParser('makeMarkdown.hr', function () {
 
+  	  return '---';
+  	});
 
-  // Current limitations:
-  // - can't put into "function arg" comments
-  // function /* (no parenthesis like this) */ (){}
-  // function abc( /* xx (no parenthesis like this) */ a, b) {}
-  //
-  // Just put the comment before function or inside:
-  // /* (((this is fine))) */ function(a, b) {}
-  // function abc(a) { /* (((this is fine))) */}
-  //
-  // - can't reliably auto-annotate constructor; we'll match the
-  // first constructor(...) pattern found which may be the one
-  // of a nested class, too.
+  	showdown.subParser('makeMarkdown.image', function (node) {
 
-  const CONSTRUCTOR_ARGS = /constructor\s*[^(]*\(\s*([^)]*)\)/m;
-  const FN_ARGS = /^(?:async\s+)?(?:function\s*[^(]*)?(?:\(\s*([^)]*)\)|(\w+))/m;
-  const FN_ARG = /\/\*([^*]*)\*\//m;
+  	  var txt = '';
+  	  if (node.hasAttribute('src')) {
+  	    txt += '![' + node.getAttribute('alt') + '](';
+  	    txt += '<' + node.getAttribute('src') + '>';
+  	    if (node.hasAttribute('width') && node.hasAttribute('height')) {
+  	      txt += ' =' + node.getAttribute('width') + 'x' + node.getAttribute('height');
+  	    }
 
-  /**
-   * @param {unknown} fn
-   *
-   * @return {string[]}
-   */
-  function parseAnnotations(fn) {
+  	    if (node.hasAttribute('title')) {
+  	      txt += ' "' + node.getAttribute('title') + '"';
+  	    }
+  	    txt += ')';
+  	  }
+  	  return txt;
+  	});
 
-    if (typeof fn !== 'function') {
-      throw new Error(`Cannot annotate "${fn}". Expected a function!`);
-    }
+  	showdown.subParser('makeMarkdown.links', function (node, globals) {
 
-    const match = fn.toString().match(isClass(fn) ? CONSTRUCTOR_ARGS : FN_ARGS);
+  	  var txt = '';
+  	  if (node.hasChildNodes() && node.hasAttribute('href')) {
+  	    var children = node.childNodes,
+  	        childrenLength = children.length;
+  	    txt = '[';
+  	    for (var i = 0; i < childrenLength; ++i) {
+  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
+  	    }
+  	    txt += '](';
+  	    txt += '<' + node.getAttribute('href') + '>';
+  	    if (node.hasAttribute('title')) {
+  	      txt += ' "' + node.getAttribute('title') + '"';
+  	    }
+  	    txt += ')';
+  	  }
+  	  return txt;
+  	});
 
-    // may parse class without constructor
-    if (!match) {
-      return [];
-    }
+  	showdown.subParser('makeMarkdown.list', function (node, globals, type) {
 
-    const args = match[1] || match[2];
+  	  var txt = '';
+  	  if (!node.hasChildNodes()) {
+  	    return '';
+  	  }
+  	  var listItems       = node.childNodes,
+  	      listItemsLenght = listItems.length,
+  	      listNum = node.getAttribute('start') || 1;
 
-    return args && args.split(',').map(arg => {
-      const argMatch = arg.match(FN_ARG);
-      return (argMatch && argMatch[1] || arg).trim();
-    }) || [];
-  }
+  	  for (var i = 0; i < listItemsLenght; ++i) {
+  	    if (typeof listItems[i].tagName === 'undefined' || listItems[i].tagName.toLowerCase() !== 'li') {
+  	      continue;
+  	    }
 
-  /**
-   * @typedef { import('./index').ModuleDeclaration } ModuleDeclaration
-   * @typedef { import('./index').ModuleDefinition } ModuleDefinition
-   * @typedef { import('./index').InjectorContext } InjectorContext
-   */
+  	    // define the bullet to use in list
+  	    var bullet = '';
+  	    if (type === 'ol') {
+  	      bullet = listNum.toString() + '. ';
+  	    } else {
+  	      bullet = '- ';
+  	    }
 
-  /**
-   * Create a new injector with the given modules.
-   *
-   * @param {ModuleDefinition[]} modules
-   * @param {InjectorContext} [parent]
-   */
-  function Injector(modules, parent) {
-    parent = parent || {
-      get: function(name, strict) {
-        currentlyResolving.push(name);
+  	    // parse list item
+  	    txt += bullet + showdown.subParser('makeMarkdown.listItem')(listItems[i], globals);
+  	    ++listNum;
+  	  }
 
-        if (strict === false) {
-          return null;
-        } else {
-          throw error(`No provider for "${ name }"!`);
-        }
-      }
-    };
+  	  // add comment at the end to prevent consecutive lists to be parsed as one
+  	  txt += '\n<!-- -->\n';
+  	  return txt.trim();
+  	});
 
-    const currentlyResolving = [];
-    const providers = this._providers = Object.create(parent._providers || null);
-    const instances = this._instances = Object.create(null);
+  	showdown.subParser('makeMarkdown.listItem', function (node, globals) {
 
-    const self = instances.injector = this;
+  	  var listItemTxt = '';
 
-    const error = function(msg) {
-      const stack = currentlyResolving.join(' -> ');
-      currentlyResolving.length = 0;
-      return new Error(stack ? `${ msg } (Resolving: ${ stack })` : msg);
-    };
+  	  var children = node.childNodes,
+  	      childrenLenght = children.length;
 
-    /**
-     * Return a named service.
-     *
-     * @param {string} name
-     * @param {boolean} [strict=true] if false, resolve missing services to null
-     *
-     * @return {any}
-     */
-    function get(name, strict) {
-      if (!providers[name] && name.indexOf('.') !== -1) {
-        const parts = name.split('.');
-        let pivot = get(parts.shift());
+  	  for (var i = 0; i < childrenLenght; ++i) {
+  	    listItemTxt += showdown.subParser('makeMarkdown.node')(children[i], globals);
+  	  }
+  	  // if it's only one liner, we need to add a newline at the end
+  	  if (!/\n$/.test(listItemTxt)) {
+  	    listItemTxt += '\n';
+  	  } else {
+  	    // it's multiparagraph, so we need to indent
+  	    listItemTxt = listItemTxt
+  	      .split('\n')
+  	      .join('\n    ')
+  	      .replace(/^ {4}$/gm, '')
+  	      .replace(/\n\n+/g, '\n\n');
+  	  }
 
-        while (parts.length) {
-          pivot = pivot[parts.shift()];
-        }
+  	  return listItemTxt;
+  	});
 
-        return pivot;
-      }
 
-      if (hasOwnProp(instances, name)) {
-        return instances[name];
-      }
 
-      if (hasOwnProp(providers, name)) {
-        if (currentlyResolving.indexOf(name) !== -1) {
-          currentlyResolving.push(name);
-          throw error('Cannot resolve circular dependency!');
-        }
+  	showdown.subParser('makeMarkdown.node', function (node, globals, spansOnly) {
 
-        currentlyResolving.push(name);
-        instances[name] = providers[name][0](providers[name][1]);
-        currentlyResolving.pop();
+  	  spansOnly = spansOnly || false;
 
-        return instances[name];
-      }
+  	  var txt = '';
 
-      return parent.get(name, strict);
-    }
+  	  // edge case of text without wrapper paragraph
+  	  if (node.nodeType === 3) {
+  	    return showdown.subParser('makeMarkdown.txt')(node, globals);
+  	  }
 
-    function fnDef(fn, locals) {
+  	  // HTML comment
+  	  if (node.nodeType === 8) {
+  	    return '<!--' + node.data + '-->\n\n';
+  	  }
 
-      if (typeof locals === 'undefined') {
-        locals = {};
-      }
+  	  // process only node elements
+  	  if (node.nodeType !== 1) {
+  	    return '';
+  	  }
 
-      if (typeof fn !== 'function') {
-        if (isArray(fn)) {
-          fn = annotate(fn.slice());
-        } else {
-          throw error(`Cannot invoke "${ fn }". Expected a function!`);
-        }
-      }
+  	  var tagName = node.tagName.toLowerCase();
 
-      const inject = fn.$inject || parseAnnotations(fn);
-      const dependencies = inject.map(dep => {
-        if (hasOwnProp(locals, dep)) {
-          return locals[dep];
-        } else {
-          return get(dep);
-        }
-      });
+  	  switch (tagName) {
 
-      return {
-        fn: fn,
-        dependencies: dependencies
-      };
-    }
+  	    //
+  	    // BLOCKS
+  	    //
+  	    case 'h1':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 1) + '\n\n'; }
+  	      break;
+  	    case 'h2':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 2) + '\n\n'; }
+  	      break;
+  	    case 'h3':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 3) + '\n\n'; }
+  	      break;
+  	    case 'h4':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 4) + '\n\n'; }
+  	      break;
+  	    case 'h5':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 5) + '\n\n'; }
+  	      break;
+  	    case 'h6':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.header')(node, globals, 6) + '\n\n'; }
+  	      break;
 
-    function instantiate(Type) {
-      const {
-        fn,
-        dependencies
-      } = fnDef(Type);
+  	    case 'p':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.paragraph')(node, globals) + '\n\n'; }
+  	      break;
 
-      // instantiate var args constructor
-      const Constructor = Function.prototype.bind.apply(fn, [ null ].concat(dependencies));
+  	    case 'blockquote':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.blockquote')(node, globals) + '\n\n'; }
+  	      break;
 
-      return new Constructor();
-    }
+  	    case 'hr':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.hr')(node, globals) + '\n\n'; }
+  	      break;
 
-    function invoke(func, context, locals) {
-      const {
-        fn,
-        dependencies
-      } = fnDef(func, locals);
+  	    case 'ol':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.list')(node, globals, 'ol') + '\n\n'; }
+  	      break;
 
-      return fn.apply(context, dependencies);
-    }
+  	    case 'ul':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.list')(node, globals, 'ul') + '\n\n'; }
+  	      break;
 
-    /**
-     * @param {Injector} childInjector
-     *
-     * @return {Function}
-     */
-    function createPrivateInjectorFactory(childInjector) {
-      return annotate(key => childInjector.get(key));
-    }
+  	    case 'precode':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.codeBlock')(node, globals) + '\n\n'; }
+  	      break;
 
-    /**
-     * @param {ModuleDefinition[]} modules
-     * @param {string[]} [forceNewInstances]
-     *
-     * @return {Injector}
-     */
-    function createChild(modules, forceNewInstances) {
-      if (forceNewInstances && forceNewInstances.length) {
-        const fromParentModule = Object.create(null);
-        const matchedScopes = Object.create(null);
+  	    case 'pre':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.pre')(node, globals) + '\n\n'; }
+  	      break;
 
-        const privateInjectorsCache = [];
-        const privateChildInjectors = [];
-        const privateChildFactories = [];
+  	    case 'table':
+  	      if (!spansOnly) { txt = showdown.subParser('makeMarkdown.table')(node, globals) + '\n\n'; }
+  	      break;
 
-        let provider;
-        let cacheIdx;
-        let privateChildInjector;
-        let privateChildInjectorFactory;
+  	    //
+  	    // SPANS
+  	    //
+  	    case 'code':
+  	      txt = showdown.subParser('makeMarkdown.codeSpan')(node, globals);
+  	      break;
 
-        for (let name in providers) {
-          provider = providers[name];
+  	    case 'em':
+  	    case 'i':
+  	      txt = showdown.subParser('makeMarkdown.emphasis')(node, globals);
+  	      break;
 
-          if (forceNewInstances.indexOf(name) !== -1) {
-            if (provider[2] === 'private') {
-              cacheIdx = privateInjectorsCache.indexOf(provider[3]);
-              if (cacheIdx === -1) {
-                privateChildInjector = provider[3].createChild([], forceNewInstances);
-                privateChildInjectorFactory = createPrivateInjectorFactory(privateChildInjector);
-                privateInjectorsCache.push(provider[3]);
-                privateChildInjectors.push(privateChildInjector);
-                privateChildFactories.push(privateChildInjectorFactory);
-                fromParentModule[name] = [ privateChildInjectorFactory, name, 'private', privateChildInjector ];
-              } else {
-                fromParentModule[name] = [ privateChildFactories[cacheIdx], name, 'private', privateChildInjectors[cacheIdx] ];
-              }
-            } else {
-              fromParentModule[name] = [ provider[2], provider[1] ];
-            }
-            matchedScopes[name] = true;
-          }
+  	    case 'strong':
+  	    case 'b':
+  	      txt = showdown.subParser('makeMarkdown.strong')(node, globals);
+  	      break;
 
-          if ((provider[2] === 'factory' || provider[2] === 'type') && provider[1].$scope) {
-            /* jshint -W083 */
-            forceNewInstances.forEach(scope => {
-              if (provider[1].$scope.indexOf(scope) !== -1) {
-                fromParentModule[name] = [ provider[2], provider[1] ];
-                matchedScopes[scope] = true;
-              }
-            });
-          }
-        }
+  	    case 'del':
+  	      txt = showdown.subParser('makeMarkdown.strikethrough')(node, globals);
+  	      break;
 
-        forceNewInstances.forEach(scope => {
-          if (!matchedScopes[scope]) {
-            throw new Error('No provider for "' + scope + '". Cannot use provider from the parent!');
-          }
-        });
+  	    case 'a':
+  	      txt = showdown.subParser('makeMarkdown.links')(node, globals);
+  	      break;
 
-        modules.unshift(fromParentModule);
-      }
+  	    case 'img':
+  	      txt = showdown.subParser('makeMarkdown.image')(node, globals);
+  	      break;
 
-      return new Injector(modules, self);
-    }
+  	    default:
+  	      txt = node.outerHTML + '\n\n';
+  	  }
 
-    const factoryMap = {
-      factory: invoke,
-      type: instantiate,
-      value: function(value) {
-        return value;
-      }
-    };
+  	  // common normalization
+  	  // TODO eventually
 
-    /**
-     * @param {ModuleDefinition} moduleDefinition
-     * @param {Injector} injector
-     */
-    function createInitializer(moduleDefinition, injector) {
+  	  return txt;
+  	});
 
-      const initializers = moduleDefinition.__init__ || [];
+  	showdown.subParser('makeMarkdown.paragraph', function (node, globals) {
 
-      return function() {
-        initializers.forEach(initializer => {
+  	  var txt = '';
+  	  if (node.hasChildNodes()) {
+  	    var children = node.childNodes,
+  	        childrenLength = children.length;
+  	    for (var i = 0; i < childrenLength; ++i) {
+  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
+  	    }
+  	  }
 
-          // eagerly resolve component (fn or string)
-          if (typeof initializer === 'string') {
-            injector.get(initializer);
-          } else {
-            injector.invoke(initializer);
-          }
-        });
-      };
-    }
+  	  // some text normalization
+  	  txt = txt.trim();
 
-    /**
-     * @param {ModuleDefinition} moduleDefinition
-     */
-    function loadModule(moduleDefinition) {
+  	  return txt;
+  	});
 
-      const moduleExports = moduleDefinition.__exports__;
+  	showdown.subParser('makeMarkdown.pre', function (node, globals) {
 
-      // private module
-      if (moduleExports) {
-        const nestedModules = moduleDefinition.__modules__;
+  	  var num  = node.getAttribute('prenum');
+  	  return '<pre>' + globals.preList[num] + '</pre>';
+  	});
 
-        const clonedModule = Object.keys(moduleDefinition).reduce((clonedModule, key) => {
+  	showdown.subParser('makeMarkdown.strikethrough', function (node, globals) {
 
-          if (key !== '__exports__' && key !== '__modules__' && key !== '__init__' && key !== '__depends__') {
-            clonedModule[key] = moduleDefinition[key];
-          }
+  	  var txt = '';
+  	  if (node.hasChildNodes()) {
+  	    txt += '~~';
+  	    var children = node.childNodes,
+  	        childrenLength = children.length;
+  	    for (var i = 0; i < childrenLength; ++i) {
+  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
+  	    }
+  	    txt += '~~';
+  	  }
+  	  return txt;
+  	});
 
-          return clonedModule;
-        }, Object.create(null));
+  	showdown.subParser('makeMarkdown.strong', function (node, globals) {
 
-        const childModules = (nestedModules || []).concat(clonedModule);
+  	  var txt = '';
+  	  if (node.hasChildNodes()) {
+  	    txt += '**';
+  	    var children = node.childNodes,
+  	        childrenLength = children.length;
+  	    for (var i = 0; i < childrenLength; ++i) {
+  	      txt += showdown.subParser('makeMarkdown.node')(children[i], globals);
+  	    }
+  	    txt += '**';
+  	  }
+  	  return txt;
+  	});
 
-        const privateInjector = createChild(childModules);
-        const getFromPrivateInjector = annotate(function(key) {
-          return privateInjector.get(key);
-        });
+  	showdown.subParser('makeMarkdown.table', function (node, globals) {
 
-        moduleExports.forEach(function(key) {
-          providers[key] = [ getFromPrivateInjector, key, 'private', privateInjector ];
-        });
+  	  var txt = '',
+  	      tableArray = [[], []],
+  	      headings   = node.querySelectorAll('thead>tr>th'),
+  	      rows       = node.querySelectorAll('tbody>tr'),
+  	      i, ii;
+  	  for (i = 0; i < headings.length; ++i) {
+  	    var headContent = showdown.subParser('makeMarkdown.tableCell')(headings[i], globals),
+  	        allign = '---';
 
-        // ensure child injector initializes
-        const initializers = (moduleDefinition.__init__ || []).slice();
+  	    if (headings[i].hasAttribute('style')) {
+  	      var style = headings[i].getAttribute('style').toLowerCase().replace(/\s/g, '');
+  	      switch (style) {
+  	        case 'text-align:left;':
+  	          allign = ':---';
+  	          break;
+  	        case 'text-align:right;':
+  	          allign = '---:';
+  	          break;
+  	        case 'text-align:center;':
+  	          allign = ':---:';
+  	          break;
+  	      }
+  	    }
+  	    tableArray[0][i] = headContent.trim();
+  	    tableArray[1][i] = allign;
+  	  }
 
-        initializers.unshift(function() {
-          privateInjector.init();
-        });
+  	  for (i = 0; i < rows.length; ++i) {
+  	    var r = tableArray.push([]) - 1,
+  	        cols = rows[i].getElementsByTagName('td');
 
-        moduleDefinition = Object.assign({}, moduleDefinition, {
-          __init__: initializers
-        });
+  	    for (ii = 0; ii < headings.length; ++ii) {
+  	      var cellContent = ' ';
+  	      if (typeof cols[ii] !== 'undefined') {
+  	        cellContent = showdown.subParser('makeMarkdown.tableCell')(cols[ii], globals);
+  	      }
+  	      tableArray[r].push(cellContent);
+  	    }
+  	  }
 
-        return createInitializer(moduleDefinition, privateInjector);
-      }
+  	  var cellSpacesCount = 3;
+  	  for (i = 0; i < tableArray.length; ++i) {
+  	    for (ii = 0; ii < tableArray[i].length; ++ii) {
+  	      var strLen = tableArray[i][ii].length;
+  	      if (strLen > cellSpacesCount) {
+  	        cellSpacesCount = strLen;
+  	      }
+  	    }
+  	  }
 
-      // normal module
-      Object.keys(moduleDefinition).forEach(function(key) {
+  	  for (i = 0; i < tableArray.length; ++i) {
+  	    for (ii = 0; ii < tableArray[i].length; ++ii) {
+  	      if (i === 1) {
+  	        if (tableArray[i][ii].slice(-1) === ':') {
+  	          tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii].slice(-1), cellSpacesCount - 1, '-') + ':';
+  	        } else {
+  	          tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii], cellSpacesCount, '-');
+  	        }
+  	      } else {
+  	        tableArray[i][ii] = showdown.helper.padEnd(tableArray[i][ii], cellSpacesCount);
+  	      }
+  	    }
+  	    txt += '| ' + tableArray[i].join(' | ') + ' |\n';
+  	  }
 
-        if (key === '__init__' || key === '__depends__') {
-          return;
-        }
+  	  return txt.trim();
+  	});
 
-        if (moduleDefinition[key][2] === 'private') {
-          providers[key] = moduleDefinition[key];
-          return;
-        }
+  	showdown.subParser('makeMarkdown.tableCell', function (node, globals) {
 
-        const type = moduleDefinition[key][0];
-        const value = moduleDefinition[key][1];
+  	  var txt = '';
+  	  if (!node.hasChildNodes()) {
+  	    return '';
+  	  }
+  	  var children = node.childNodes,
+  	      childrenLength = children.length;
 
-        providers[key] = [ factoryMap[type], arrayUnwrap(type, value), type ];
-      });
+  	  for (var i = 0; i < childrenLength; ++i) {
+  	    txt += showdown.subParser('makeMarkdown.node')(children[i], globals, true);
+  	  }
+  	  return txt.trim();
+  	});
 
-      return createInitializer(moduleDefinition, self);
-    }
+  	showdown.subParser('makeMarkdown.txt', function (node) {
 
-    /**
-     * @param {ModuleDefinition[]} moduleDefinitions
-     * @param {ModuleDefinition} moduleDefinition
-     *
-     * @return {ModuleDefinition[]}
-     */
-    function resolveDependencies(moduleDefinitions, moduleDefinition) {
+  	  var txt = node.nodeValue;
 
-      if (moduleDefinitions.indexOf(moduleDefinition) !== -1) {
-        return moduleDefinitions;
-      }
+  	  // multiple spaces are collapsed
+  	  txt = txt.replace(/ +/g, ' ');
 
-      moduleDefinitions = (moduleDefinition.__depends__ || []).reduce(resolveDependencies, moduleDefinitions);
+  	  // replace the custom ¨NBSP; with a space
+  	  txt = txt.replace(/¨NBSP;/g, ' ');
 
-      if (moduleDefinitions.indexOf(moduleDefinition) !== -1) {
-        return moduleDefinitions;
-      }
+  	  // ", <, > and & should replace escaped html entities
+  	  txt = showdown.helper.unescapeHTMLEntities(txt);
 
-      return moduleDefinitions.concat(moduleDefinition);
-    }
+  	  // escape markdown magic characters
+  	  // emphasis, strong and strikethrough - can appear everywhere
+  	  // we also escape pipe (|) because of tables
+  	  // and escape ` because of code blocks and spans
+  	  txt = txt.replace(/([*_~|`])/g, '\\$1');
 
-    /**
-     * @param {ModuleDefinition[]} moduleDefinitions
-     *
-     * @return { () => void } initializerFn
-     */
-    function bootstrap(moduleDefinitions) {
+  	  // escape > because of blockquotes
+  	  txt = txt.replace(/^(\s*)>/g, '\\$1>');
 
-      const initializers = moduleDefinitions
-        .reduce(resolveDependencies, [])
-        .map(loadModule);
+  	  // hash character, only troublesome at the beginning of a line because of headers
+  	  txt = txt.replace(/^#/gm, '\\#');
 
-      let initialized = false;
+  	  // horizontal rules
+  	  txt = txt.replace(/^(\s*)([-=]{3,})(\s*)$/, '$1\\$2$3');
 
-      return function() {
+  	  // dot, because of ordered lists, only troublesome at the beginning of a line when preceded by an integer
+  	  txt = txt.replace(/^( {0,3}\d+)\./gm, '$1\\.');
 
-        if (initialized) {
-          return;
-        }
+  	  // +, * and -, at the beginning of a line becomes a list, so we need to escape them also (asterisk was already escaped)
+  	  txt = txt.replace(/^( {0,3})([+-])/gm, '$1\\$2');
 
-        initialized = true;
+  	  // images and links, ] followed by ( is problematic, so we escape it
+  	  txt = txt.replace(/]([\s]*)\(/g, '\\]$1\\(');
 
-        initializers.forEach(initializer => initializer());
-      };
-    }
+  	  // reference URIs must also be escaped
+  	  txt = txt.replace(/^ {0,3}\[([\S \t]*?)]:/gm, '\\[$1]:');
 
-    // public API
-    this.get = get;
-    this.invoke = invoke;
-    this.instantiate = instantiate;
-    this.createChild = createChild;
+  	  return txt;
+  	});
 
-    // setup
-    this.init = bootstrap(modules);
-  }
+  	var root = this;
 
+  	// AMD Loader
+  	if (module.exports) {
+  	  module.exports = showdown;
 
-  // helpers ///////////////
+  	// Regular Browser loader
+  	} else {
+  	  root.showdown = showdown;
+  	}
+  	}).call(commonjsGlobal);
 
-  function arrayUnwrap(type, value) {
-    if (type !== 'value' && isArray(value)) {
-      value = annotate(value.slice());
-    }
+  	
+  } (showdown$1));
 
-    return value;
-  }
+  var showdownExports = showdown$1.exports;
+  var showdown = /*@__PURE__*/getDefaultExportFromCjs(showdownExports);
 
-  const getFlavouredFeelVariableNames = (feelString, feelFlavour, options = {}) => {
+  const getFlavouredFeelVariableNames = (feelString, feelFlavour = 'expression', options = {}) => {
     const {
       depth = 0,
       specialDepthAccessors = {}
     } = options;
     if (!['expression', 'unaryTest'].includes(feelFlavour)) return [];
-    const tree = feelFlavour === 'expression' ? parseExpressions$1(feelString) : parseUnaryTests$1(feelString);
+    const tree = feelFlavour === 'expression' ? parseExpression(feelString) : parseUnaryTests(feelString);
     const simpleExpressionTree = _buildSimpleFeelStructureTree(tree, feelString);
-    return function _unfoldVariables(node) {
+    const variables = function _unfoldVariables(node) {
       if (node.name === 'PathExpression') {
         if (Object.keys(specialDepthAccessors).length === 0) {
           return depth === 0 ? [_getVariableNameAtPathIndex(node, 0)] : [];
@@ -42087,12 +40112,16 @@
 
       // for any other kind of node, traverse its children and flatten the result
       if (node.children) {
-        return node.children.reduce((acc, child) => {
+        const variables = node.children.reduce((acc, child) => {
           return acc.concat(_unfoldVariables(child));
         }, []);
+
+        // if we are within a filter context, we need to remove the item variable as it is used for iteration there
+        return node.name === 'FilterContext' ? variables.filter(name => name !== 'item') : variables;
       }
       return [];
     }(simpleExpressionTree);
+    return [...new Set(variables)];
   };
 
   /**
@@ -42212,7 +40241,45 @@
         parent.children.push(result);
       }
     });
-    return stack[0].children[0];
+    return _extractFilterExpressions(stack[0].children[0]);
+  };
+
+  /**
+   * Restructure the tree in such a way to bring filters (which create new contexts) to the root of the tree.
+   * This is done to simplify the extraction of variables and match the context hierarchy.
+   */
+  const _extractFilterExpressions = tree => {
+    const flattenedExpressionTree = {
+      name: 'Root',
+      children: [tree]
+    };
+    const iterate = node => {
+      if (node.children) {
+        for (let x = 0; x < node.children.length; x++) {
+          if (node.children[x].name === 'FilterExpression') {
+            const filterTarget = node.children[x].children[0];
+            const filterExpression = node.children[x].children[2];
+
+            // bypass the filter expression
+            node.children[x] = filterTarget;
+            const taggedFilterExpression = {
+              name: 'FilterContext',
+              children: [filterExpression]
+            };
+
+            // append the filter expression to the root
+            flattenedExpressionTree.children.push(taggedFilterExpression);
+
+            // recursively iterate the expression
+            iterate(filterExpression);
+          } else {
+            iterate(node.children[x]);
+          }
+        }
+      }
+    };
+    iterate(tree);
+    return flattenedExpressionTree;
   };
 
   class FeelExpressionLanguage {
@@ -42228,7 +40295,7 @@
      *
      */
     isExpression(value) {
-      return isString$3(value) && value.startsWith('=');
+      return isString$2(value) && value.startsWith('=');
     }
 
     /**
@@ -42265,11 +40332,11 @@
       if (!expression) {
         return null;
       }
-      if (!isString$3(expression) || !expression.startsWith('=')) {
+      if (!isString$2(expression) || !expression.startsWith('=')) {
         return null;
       }
       try {
-        const result = evaluate$2(expression.slice(1), data);
+        const result = evaluate$1(expression.slice(1), data);
         return result;
       } catch (error) {
         this._eventBus.fire('error', {
@@ -42292,7 +40359,7 @@
      *
      */
     isTemplate(value) {
-      return isString$3(value) && (value.startsWith('=') || /{{.*?}}/.test(value));
+      return isString$2(value) && (value.startsWith('=') || /{{.*?}}/.test(value));
     }
 
     /**
@@ -42351,176 +40418,841 @@
       });
     }
 
-    /**
-    * @typedef {Object} ExpressionWithDepth
-    * @property {number} depth - The depth of the expression in the syntax tree.
-    * @property {string} expression - The extracted expression
-    */
+    /**
+    * @typedef {Object} ExpressionWithDepth
+    * @property {number} depth - The depth of the expression in the syntax tree.
+    * @property {string} expression - The extracted expression
+    */
+
+    /**
+    * Extracts all feel expressions in the template along with their depth in the syntax tree.
+    * The depth is incremented for child expressions of loops to account for context drilling.
+    * @name extractExpressionsWithDepth
+    * @param {string} template - A feelers template string.
+    * @returns {Array<ExpressionWithDepth>} An array of objects, each containing the depth and the extracted expression.
+    *
+    * @example
+    * const template = "Hello {{user}}, you have:{{#loop items}}\n- {{amount}} {{name}}{{/loop}}.";
+    * const extractedExpressions = _extractExpressionsWithDepth(template);
+    */
+    _extractExpressionsWithDepth(template) {
+      // build simplified feelers syntax tree
+      const parseTree = parser.parse(template);
+      const tree = buildSimpleTree(parseTree, template);
+      return function _traverse(n, depth = 0) {
+        if (['Feel', 'FeelBlock'].includes(n.name)) {
+          return [{
+            depth,
+            expression: n.content
+          }];
+        }
+        if (n.name === 'LoopSpanner') {
+          const loopExpression = n.children[0].content;
+          const childResults = n.children.slice(1).reduce((acc, child) => {
+            return acc.concat(_traverse(child, depth + 1));
+          }, []);
+          return [{
+            depth,
+            expression: loopExpression
+          }, ...childResults];
+        }
+        return n.children.reduce((acc, child) => {
+          return acc.concat(_traverse(child, depth));
+        }, []);
+      }(tree);
+    }
+  }
+  FeelersTemplating.$inject = [];
+
+  /**
+   * @typedef {object} Condition
+   * @property {string} [hide]
+   */
+
+  class ConditionChecker {
+    constructor(formFieldRegistry, eventBus) {
+      this._formFieldRegistry = formFieldRegistry;
+      this._eventBus = eventBus;
+    }
+
+    /**
+     * For given data, remove properties based on condition.
+     *
+     * @param {Object<string, any>} properties
+     * @param {Object<string, any>} data
+     */
+    applyConditions(properties, data = {}) {
+      const conditions = this._getConditions();
+      const newProperties = {
+        ...properties
+      };
+      for (const {
+        key,
+        condition
+      } of conditions) {
+        const shouldRemove = this._checkHideCondition(condition, data);
+        if (shouldRemove) {
+          delete newProperties[key];
+        }
+      }
+      return newProperties;
+    }
+
+    /**
+     * Check if given condition is met. Returns null for invalid/missing conditions.
+     *
+     * @param {string} condition
+     * @param {import('../../types').Data} [data]
+     *
+     * @returns {boolean|null}
+     */
+    check(condition, data = {}) {
+      if (!condition) {
+        return null;
+      }
+      if (!isString$2(condition) || !condition.startsWith('=')) {
+        return null;
+      }
+      try {
+        // cut off initial '='
+        const result = unaryTest(condition.slice(1), data);
+        return result;
+      } catch (error) {
+        this._eventBus.fire('error', {
+          error
+        });
+        return null;
+      }
+    }
+
+    /**
+     * Check if hide condition is met.
+     *
+     * @param {Condition} condition
+     * @param {Object<string, any>} data
+     * @returns {boolean}
+     */
+    _checkHideCondition(condition, data) {
+      if (!condition.hide) {
+        return false;
+      }
+      const result = this.check(condition.hide, data);
+      return result === true;
+    }
+    _getConditions() {
+      const formFields = this._formFieldRegistry.getAll();
+      return formFields.reduce((conditions, formField) => {
+        const {
+          key,
+          conditional: condition
+        } = formField;
+        if (key && condition) {
+          return [...conditions, {
+            key,
+            condition
+          }];
+        }
+        return conditions;
+      }, []);
+    }
+  }
+  ConditionChecker.$inject = ['formFieldRegistry', 'eventBus'];
+
+  var ExpressionLanguageModule = {
+    __init__: ['expressionLanguage', 'templating', 'conditionChecker'],
+    expressionLanguage: ['type', FeelExpressionLanguage],
+    templating: ['type', FeelersTemplating],
+    conditionChecker: ['type', ConditionChecker]
+  };
+
+  // bootstrap showdown to support github flavored markdown
+  showdown.setFlavor('github');
+  class MarkdownRenderer {
+    constructor() {
+      this._converter = new showdown.Converter();
+    }
+
+    /**
+     * Render markdown to HTML.
+     *
+     * @param {string} markdown - The markdown to render
+     *
+     * @returns {string} HTML
+     */
+    render(markdown) {
+      return this._converter.makeHtml(markdown);
+    }
+  }
+  MarkdownRenderer.$inject = [];
+
+  var MarkdownModule = {
+    __init__: ['markdownRenderer'],
+    markdownRenderer: ['type', MarkdownRenderer]
+  };
+
+  /**
+   * @typedef {import('didi').Injector} Injector
+   *
+   * @typedef {import('../core/Types').ElementLike} ElementLike
+   *
+   * @typedef {import('../core/EventBus').default} EventBus
+   * @typedef {import('./CommandHandler').default} CommandHandler
+   *
+   * @typedef { any } CommandContext
+   * @typedef { {
+   *   new (...args: any[]) : CommandHandler
+   * } } CommandHandlerConstructor
+   * @typedef { {
+   *   [key: string]: CommandHandler;
+   * } } CommandHandlerMap
+   * @typedef { {
+   *   command: string;
+   *   context: any;
+   *   id?: any;
+   * } } CommandStackAction
+   * @typedef { {
+   *   actions: CommandStackAction[];
+   *   dirty: ElementLike[];
+   *   trigger: 'execute' | 'undo' | 'redo' | 'clear' | null;
+   *   atomic?: boolean;
+   * } } CurrentExecution
+   */
+
+  /**
+   * A service that offers un- and redoable execution of commands.
+   *
+   * The command stack is responsible for executing modeling actions
+   * in a un- and redoable manner. To do this it delegates the actual
+   * command execution to {@link CommandHandler}s.
+   *
+   * Command handlers provide {@link CommandHandler#execute(ctx)} and
+   * {@link CommandHandler#revert(ctx)} methods to un- and redo a command
+   * identified by a command context.
+   *
+   *
+   * ## Life-Cycle events
+   *
+   * In the process the command stack fires a number of life-cycle events
+   * that other components to participate in the command execution.
+   *
+   *    * preExecute
+   *    * preExecuted
+   *    * execute
+   *    * executed
+   *    * postExecute
+   *    * postExecuted
+   *    * revert
+   *    * reverted
+   *
+   * A special event is used for validating, whether a command can be
+   * performed prior to its execution.
+   *
+   *    * canExecute
+   *
+   * Each of the events is fired as `commandStack.{eventName}` and
+   * `commandStack.{commandName}.{eventName}`, respectively. This gives
+   * components fine grained control on where to hook into.
+   *
+   * The event object fired transports `command`, the name of the
+   * command and `context`, the command context.
+   *
+   *
+   * ## Creating Command Handlers
+   *
+   * Command handlers should provide the {@link CommandHandler#execute(ctx)}
+   * and {@link CommandHandler#revert(ctx)} methods to implement
+   * redoing and undoing of a command.
+   *
+   * A command handler _must_ ensure undo is performed properly in order
+   * not to break the undo chain. It must also return the shapes that
+   * got changed during the `execute` and `revert` operations.
+   *
+   * Command handlers may execute other modeling operations (and thus
+   * commands) in their `preExecute(d)` and `postExecute(d)` phases. The command
+   * stack will properly group all commands together into a logical unit
+   * that may be re- and undone atomically.
+   *
+   * Command handlers must not execute other commands from within their
+   * core implementation (`execute`, `revert`).
+   *
+   *
+   * ## Change Tracking
+   *
+   * During the execution of the CommandStack it will keep track of all
+   * elements that have been touched during the command's execution.
+   *
+   * At the end of the CommandStack execution it will notify interested
+   * components via an 'elements.changed' event with all the dirty
+   * elements.
+   *
+   * The event can be picked up by components that are interested in the fact
+   * that elements have been changed. One use case for this is updating
+   * their graphical representation after moving / resizing or deletion.
+   *
+   * @see CommandHandler
+   *
+   * @param {EventBus} eventBus
+   * @param {Injector} injector
+   */
+  function CommandStack(eventBus, injector) {
+    /**
+     * A map of all registered command handlers.
+     *
+     * @type {CommandHandlerMap}
+     */
+    this._handlerMap = {};
+
+    /**
+     * A stack containing all re/undoable actions on the diagram
+     *
+     * @type {CommandStackAction[]}
+     */
+    this._stack = [];
+
+    /**
+     * The current index on the stack
+     *
+     * @type {number}
+     */
+    this._stackIdx = -1;
+
+    /**
+     * Current active commandStack execution
+     *
+     * @type {CurrentExecution}
+     */
+    this._currentExecution = {
+      actions: [],
+      dirty: [],
+      trigger: null
+    };
+
+    /**
+     * @type {Injector}
+     */
+    this._injector = injector;
+
+    /**
+     * @type EventBus
+     */
+    this._eventBus = eventBus;
+
+    /**
+     * @type { number }
+     */
+    this._uid = 1;
+    eventBus.on(['diagram.destroy', 'diagram.clear'], function () {
+      this.clear(false);
+    }, this);
+  }
+  CommandStack.$inject = ['eventBus', 'injector'];
+
+  /**
+   * Execute a command.
+   *
+   * @param {string} command The command to execute.
+   * @param {CommandContext} context The context with which to execute the command.
+   */
+  CommandStack.prototype.execute = function (command, context) {
+    if (!command) {
+      throw new Error('command required');
+    }
+    this._currentExecution.trigger = 'execute';
+    const action = {
+      command: command,
+      context: context
+    };
+    this._pushAction(action);
+    this._internalExecute(action);
+    this._popAction();
+  };
+
+  /**
+   * Check whether a command can be executed.
+   *
+   * Implementors may hook into the mechanism on two ways:
+   *
+   *   * in event listeners:
+   *
+   *     Users may prevent the execution via an event listener.
+   *     It must prevent the default action for `commandStack.(<command>.)canExecute` events.
+   *
+   *   * in command handlers:
+   *
+   *     If the method {@link CommandHandler#canExecute} is implemented in a handler
+   *     it will be called to figure out whether the execution is allowed.
+   *
+   * @param {string} command The command to execute.
+   * @param {CommandContext} context The context with which to execute the command.
+   *
+   * @return {boolean} Whether the command can be executed with the given context.
+   */
+  CommandStack.prototype.canExecute = function (command, context) {
+    const action = {
+      command: command,
+      context: context
+    };
+    const handler = this._getHandler(command);
+    let result = this._fire(command, 'canExecute', action);
+
+    // handler#canExecute will only be called if no listener
+    // decided on a result already
+    if (result === undefined) {
+      if (!handler) {
+        return false;
+      }
+      if (handler.canExecute) {
+        result = handler.canExecute(context);
+      }
+    }
+    return result;
+  };
+
+  /**
+   * Clear the command stack, erasing all undo / redo history.
+   *
+   * @param {boolean} [emit=true] Whether to fire an event. Defaults to `true`.
+   */
+  CommandStack.prototype.clear = function (emit) {
+    this._stack.length = 0;
+    this._stackIdx = -1;
+    if (emit !== false) {
+      this._fire('changed', {
+        trigger: 'clear'
+      });
+    }
+  };
+
+  /**
+   * Undo last command(s)
+   */
+  CommandStack.prototype.undo = function () {
+    let action = this._getUndoAction(),
+      next;
+    if (action) {
+      this._currentExecution.trigger = 'undo';
+      this._pushAction(action);
+      while (action) {
+        this._internalUndo(action);
+        next = this._getUndoAction();
+        if (!next || next.id !== action.id) {
+          break;
+        }
+        action = next;
+      }
+      this._popAction();
+    }
+  };
+
+  /**
+   * Redo last command(s)
+   */
+  CommandStack.prototype.redo = function () {
+    let action = this._getRedoAction(),
+      next;
+    if (action) {
+      this._currentExecution.trigger = 'redo';
+      this._pushAction(action);
+      while (action) {
+        this._internalExecute(action, true);
+        next = this._getRedoAction();
+        if (!next || next.id !== action.id) {
+          break;
+        }
+        action = next;
+      }
+      this._popAction();
+    }
+  };
+
+  /**
+   * Register a handler instance with the command stack.
+   *
+   * @param {string} command Command to be executed.
+   * @param {CommandHandler} handler Handler to execute the command.
+   */
+  CommandStack.prototype.register = function (command, handler) {
+    this._setHandler(command, handler);
+  };
+
+  /**
+   * Register a handler type with the command stack  by instantiating it and
+   * injecting its dependencies.
+   *
+   * @param {string} command Command to be executed.
+   * @param {CommandHandlerConstructor} handlerCls Constructor to instantiate a {@link CommandHandler}.
+   */
+  CommandStack.prototype.registerHandler = function (command, handlerCls) {
+    if (!command || !handlerCls) {
+      throw new Error('command and handlerCls must be defined');
+    }
+    const handler = this._injector.instantiate(handlerCls);
+    this.register(command, handler);
+  };
+
+  /**
+   * @return {boolean}
+   */
+  CommandStack.prototype.canUndo = function () {
+    return !!this._getUndoAction();
+  };
+
+  /**
+   * @return {boolean}
+   */
+  CommandStack.prototype.canRedo = function () {
+    return !!this._getRedoAction();
+  };
+
+  // stack access  //////////////////////
+
+  CommandStack.prototype._getRedoAction = function () {
+    return this._stack[this._stackIdx + 1];
+  };
+  CommandStack.prototype._getUndoAction = function () {
+    return this._stack[this._stackIdx];
+  };
+
+  // internal functionality //////////////////////
+
+  CommandStack.prototype._internalUndo = function (action) {
+    const command = action.command,
+      context = action.context;
+    const handler = this._getHandler(command);
+
+    // guard against illegal nested command stack invocations
+    this._atomicDo(() => {
+      this._fire(command, 'revert', action);
+      if (handler.revert) {
+        this._markDirty(handler.revert(context));
+      }
+      this._revertedAction(action);
+      this._fire(command, 'reverted', action);
+    });
+  };
+  CommandStack.prototype._fire = function (command, qualifier, event) {
+    if (arguments.length < 3) {
+      event = qualifier;
+      qualifier = null;
+    }
+    const names = qualifier ? [command + '.' + qualifier, qualifier] : [command];
+    let result;
+    event = this._eventBus.createEvent(event);
+    for (const name of names) {
+      result = this._eventBus.fire('commandStack.' + name, event);
+      if (event.cancelBubble) {
+        break;
+      }
+    }
+    return result;
+  };
+  CommandStack.prototype._createId = function () {
+    return this._uid++;
+  };
+  CommandStack.prototype._atomicDo = function (fn) {
+    const execution = this._currentExecution;
+    execution.atomic = true;
+    try {
+      fn();
+    } finally {
+      execution.atomic = false;
+    }
+  };
+  CommandStack.prototype._internalExecute = function (action, redo) {
+    const command = action.command,
+      context = action.context;
+    const handler = this._getHandler(command);
+    if (!handler) {
+      throw new Error('no command handler registered for <' + command + '>');
+    }
+    this._pushAction(action);
+    if (!redo) {
+      this._fire(command, 'preExecute', action);
+      if (handler.preExecute) {
+        handler.preExecute(context);
+      }
+      this._fire(command, 'preExecuted', action);
+    }
+
+    // guard against illegal nested command stack invocations
+    this._atomicDo(() => {
+      this._fire(command, 'execute', action);
+      if (handler.execute) {
+        // actual execute + mark return results as dirty
+        this._markDirty(handler.execute(context));
+      }
+
+      // log to stack
+      this._executedAction(action, redo);
+      this._fire(command, 'executed', action);
+    });
+    if (!redo) {
+      this._fire(command, 'postExecute', action);
+      if (handler.postExecute) {
+        handler.postExecute(context);
+      }
+      this._fire(command, 'postExecuted', action);
+    }
+    this._popAction();
+  };
+  CommandStack.prototype._pushAction = function (action) {
+    const execution = this._currentExecution,
+      actions = execution.actions;
+    const baseAction = actions[0];
+    if (execution.atomic) {
+      throw new Error('illegal invocation in <execute> or <revert> phase (action: ' + action.command + ')');
+    }
+    if (!action.id) {
+      action.id = baseAction && baseAction.id || this._createId();
+    }
+    actions.push(action);
+  };
+  CommandStack.prototype._popAction = function () {
+    const execution = this._currentExecution,
+      trigger = execution.trigger,
+      actions = execution.actions,
+      dirty = execution.dirty;
+    actions.pop();
+    if (!actions.length) {
+      this._eventBus.fire('elements.changed', {
+        elements: uniqueBy('id', dirty.reverse())
+      });
+      dirty.length = 0;
+      this._fire('changed', {
+        trigger: trigger
+      });
+      execution.trigger = null;
+    }
+  };
+  CommandStack.prototype._markDirty = function (elements) {
+    const execution = this._currentExecution;
+    if (!elements) {
+      return;
+    }
+    elements = isArray$2(elements) ? elements : [elements];
+    execution.dirty = execution.dirty.concat(elements);
+  };
+  CommandStack.prototype._executedAction = function (action, redo) {
+    const stackIdx = ++this._stackIdx;
+    if (!redo) {
+      this._stack.splice(stackIdx, this._stack.length, action);
+    }
+  };
+  CommandStack.prototype._revertedAction = function (action) {
+    this._stackIdx--;
+  };
+  CommandStack.prototype._getHandler = function (command) {
+    return this._handlerMap[command];
+  };
+  CommandStack.prototype._setHandler = function (command, handler) {
+    if (!command || !handler) {
+      throw new Error('command and handler required');
+    }
+    if (this._handlerMap[command]) {
+      throw new Error('overriding handler for command <' + command + '>');
+    }
+    this._handlerMap[command] = handler;
+  };
+
+  /**
+   * @type { import('didi').ModuleDeclaration }
+   */
+  var commandModule = {
+    commandStack: ['type', CommandStack]
+  };
 
-    /**
-    * Extracts all feel expressions in the template along with their depth in the syntax tree.
-    * The depth is incremented for child expressions of loops to account for context drilling.
-    * @name extractExpressionsWithDepth
-    * @param {string} template - A feelers template string.
-    * @returns {Array<ExpressionWithDepth>} An array of objects, each containing the depth and the extracted expression.
-    *
-    * @example
-    * const template = "Hello {{user}}, you have:{{#loop items}}\n- {{amount}} {{name}}{{/loop}}.";
-    * const extractedExpressions = _extractExpressionsWithDepth(template);
-    */
-    _extractExpressionsWithDepth(template) {
-      // build simplified feelers syntax tree
-      const parseTree = parser.parse(template);
-      const tree = buildSimpleTree(parseTree, template);
-      return function _traverse(n, depth = 0) {
-        if (['Feel', 'FeelBlock'].includes(n.name)) {
-          return [{
-            depth,
-            expression: n.content
-          }];
-        }
-        if (n.name === 'LoopSpanner') {
-          const loopExpression = n.children[0].content;
-          const childResults = n.children.slice(1).reduce((acc, child) => {
-            return acc.concat(_traverse(child, depth + 1));
-          }, []);
-          return [{
-            depth,
-            expression: loopExpression
-          }, ...childResults];
-        }
-        return n.children.reduce((acc, child) => {
-          return acc.concat(_traverse(child, depth));
-        }, []);
-      }(tree);
-    }
+  // config  ///////////////////
+
+  const MINUTES_IN_DAY = 60 * 24;
+  const DATETIME_SUBTYPES = {
+    DATE: 'date',
+    TIME: 'time',
+    DATETIME: 'datetime'
+  };
+  const TIME_SERIALISING_FORMATS = {
+    UTC_OFFSET: 'utc_offset',
+    UTC_NORMALIZED: 'utc_normalized',
+    NO_TIMEZONE: 'no_timezone'
+  };
+  const DATETIME_SUBTYPE_PATH = ['subtype'];
+  const DATE_LABEL_PATH = ['dateLabel'];
+
+  function createInjector(bootstrapModules) {
+    const injector = new Injector(bootstrapModules);
+    injector.init();
+    return injector;
   }
-  FeelersTemplating.$inject = [];
 
   /**
-   * @typedef {object} Condition
-   * @property {string} [hide]
+   * @param {string?} prefix
+   *
+   * @returns Element
    */
+  function createFormContainer(prefix = 'fjs') {
+    const container = document.createElement('div');
+    container.classList.add(`${prefix}-container`);
+    return container;
+  }
 
-  class ConditionChecker {
-    constructor(formFieldRegistry, eventBus) {
-      this._formFieldRegistry = formFieldRegistry;
-      this._eventBus = eventBus;
+  const EXPRESSION_PROPERTIES = ['alt', 'appearance.prefixAdorner', 'appearance.suffixAdorner', 'conditional.hide', 'description', 'label', 'source', 'readonly', 'text', 'validate.min', 'validate.max', 'validate.minLength', 'validate.maxLength', 'valuesExpression'];
+  const TEMPLATE_PROPERTIES = ['alt', 'appearance.prefixAdorner', 'appearance.suffixAdorner', 'description', 'label', 'source', 'text'];
+  function findErrors(errors, path) {
+    return errors[pathStringify(path)];
+  }
+  function pathStringify(path) {
+    if (!path) {
+      return '';
+    }
+    return path.join('.');
+  }
+  const indices = {};
+  function generateIndexForType(type) {
+    if (type in indices) {
+      indices[type]++;
+    } else {
+      indices[type] = 1;
     }
+    return indices[type];
+  }
+  function generateIdForType(type) {
+    return `${type}${generateIndexForType(type)}`;
+  }
 
-    /**
-     * For given data, remove properties based on condition.
-     *
-     * @param {Object<string, any>} properties
-     * @param {Object<string, any>} data
-     */
-    applyConditions(properties, data = {}) {
-      const conditions = this._getConditions();
-      const newProperties = {
-        ...properties
-      };
-      for (const {
+  /**
+   * @template T
+   * @param {T} data
+   * @param {(this: any, key: string, value: any) => any} [replacer]
+   * @return {T}
+   */
+  function clone(data, replacer) {
+    return JSON.parse(JSON.stringify(data, replacer));
+  }
+
+  /**
+   * Parse the schema for input variables a form might make use of
+   *
+   * @param {any} schema
+   *
+   * @return {string[]}
+   */
+  function getSchemaVariables(schema, options = {}) {
+    const {
+      expressionLanguage = new FeelExpressionLanguage(null),
+      templating = new FeelersTemplating(),
+      inputs = true,
+      outputs = true
+    } = options;
+    if (!schema.components) {
+      return [];
+    }
+    const variables = schema.components.reduce((variables, component) => {
+      const {
         key,
-        condition
-      } of conditions) {
-        const shouldRemove = this._checkHideCondition(condition, data);
-        if (shouldRemove) {
-          delete newProperties[key];
-        }
+        valuesKey,
+        type
+      } = component;
+      if (['button'].includes(type)) {
+        return variables;
       }
-      return newProperties;
-    }
 
-    /**
-     * Check if given condition is met. Returns null for invalid/missing conditions.
-     *
-     * @param {string} condition
-     * @param {import('../../types').Data} [data]
-     *
-     * @returns {boolean|null}
-     */
-    check(condition, data = {}) {
-      if (!condition) {
-        return null;
-      }
-      if (!isString$3(condition) || !condition.startsWith('=')) {
-        return null;
+      // collect bi-directional variables
+      if (inputs || outputs) {
+        if (key) {
+          variables = [...variables, key];
+        }
       }
-      try {
-        // cut off initial '='
-        const result = unaryTest(condition.slice(1), data);
-        return result;
-      } catch (error) {
-        this._eventBus.fire('error', {
-          error
+
+      // collect input-only variables
+      if (inputs) {
+        if (valuesKey) {
+          variables = [...variables, valuesKey];
+        }
+        EXPRESSION_PROPERTIES.forEach(prop => {
+          const property = get(component, prop.split('.'));
+          if (property && expressionLanguage.isExpression(property)) {
+            const expressionVariables = expressionLanguage.getVariableNames(property, {
+              type: 'expression'
+            });
+            variables = [...variables, ...expressionVariables];
+          }
+        });
+        TEMPLATE_PROPERTIES.forEach(prop => {
+          const property = get(component, prop.split('.'));
+          if (property && !expressionLanguage.isExpression(property) && templating.isTemplate(property)) {
+            const templateVariables = templating.getVariableNames(property);
+            variables = [...variables, ...templateVariables];
+          }
         });
-        return null;
       }
-    }
+      return variables.filter(variable => variable !== undefined || variable !== null);
+    }, []);
 
-    /**
-     * Check if hide condition is met.
-     *
-     * @param {Condition} condition
-     * @param {Object<string, any>} data
-     * @returns {boolean}
-     */
-    _checkHideCondition(condition, data) {
-      if (!condition.hide) {
-        return false;
-      }
-      const result = this.check(condition.hide, data);
-      return result === true;
+    // remove duplicates
+    return Array.from(new Set(variables));
+  }
+
+  class UpdateFieldValidationHandler {
+    constructor(form, validator) {
+      this._form = form;
+      this._validator = validator;
     }
-    _getConditions() {
-      const formFields = this._formFieldRegistry.getAll();
-      return formFields.reduce((conditions, formField) => {
-        const {
-          key,
-          conditional: condition
-        } = formField;
-        if (key && condition) {
-          return [...conditions, {
-            key,
-            condition
-          }];
-        }
-        return conditions;
-      }, []);
+    execute(context) {
+      const {
+        field,
+        value
+      } = context;
+      const {
+        _path
+      } = field;
+      const {
+        errors
+      } = this._form._getState();
+      context.oldErrors = clone(errors);
+      const fieldErrors = this._validator.validateField(field, value);
+      const updatedErrors = set(errors, [pathStringify(_path)], fieldErrors.length ? fieldErrors : undefined);
+      this._form._setState({
+        errors: updatedErrors
+      });
+    }
+    revert(context) {
+      this._form._setState({
+        errors: context.oldErrors
+      });
     }
   }
-  ConditionChecker.$inject = ['formFieldRegistry', 'eventBus'];
-
-  var ExpressionLanguageModule = {
-    __init__: ['expressionLanguage', 'templating', 'conditionChecker'],
-    expressionLanguage: ['type', FeelExpressionLanguage],
-    templating: ['type', FeelersTemplating],
-    conditionChecker: ['type', ConditionChecker]
-  };
+  UpdateFieldValidationHandler.$inject = ['form', 'validator'];
 
-  // bootstrap showdown to support github flavored markdown
-  showdownExports.setFlavor('github');
-  class MarkdownRenderer {
-    constructor() {
-      this._converter = new showdownExports.Converter();
+  class ViewerCommands {
+    constructor(commandStack, eventBus) {
+      this._commandStack = commandStack;
+      eventBus.on('form.init', () => {
+        this.registerHandlers();
+      });
     }
-
-    /**
-     * Render markdown to HTML.
-     *
-     * @param {string} markdown - The markdown to render
-     *
-     * @returns {string} HTML
-     */
-    render(markdown) {
-      return this._converter.makeHtml(markdown);
+    registerHandlers() {
+      Object.entries(this.getHandlers()).forEach(([id, handler]) => {
+        this._commandStack.registerHandler(id, handler);
+      });
+    }
+    getHandlers() {
+      return {
+        'formField.validation.update': UpdateFieldValidationHandler
+      };
+    }
+    updateFieldValidation(field, value) {
+      const context = {
+        field,
+        value
+      };
+      this._commandStack.execute('formField.validation.update', context);
     }
   }
-  MarkdownRenderer.$inject = [];
+  ViewerCommands.$inject = ['commandStack', 'eventBus'];
 
-  var MarkdownModule = {
-    __init__: ['markdownRenderer'],
-    markdownRenderer: ['type', MarkdownRenderer]
+  var ViewerCommandsModule = {
+    __depends__: [commandModule],
+    __init__: ['viewerCommands'],
+    viewerCommands: ['type', ViewerCommands]
   };
 
   var FN_REF = '__fn';
@@ -42665,13 +41397,13 @@
    * @param {any} [that] callback context
    */
   EventBus.prototype.on = function (events, priority, callback, that) {
-    events = isArray$3(events) ? events : [events];
+    events = isArray$2(events) ? events : [events];
     if (isFunction(priority)) {
       that = callback;
       callback = priority;
       priority = DEFAULT_PRIORITY;
     }
-    if (!isNumber$3(priority)) {
+    if (!isNumber$2(priority)) {
       throw new Error('priority must be a number');
     }
     var actualCallback = callback;
@@ -42710,7 +41442,7 @@
       callback = priority;
       priority = DEFAULT_PRIORITY;
     }
-    if (!isNumber$3(priority)) {
+    if (!isNumber$2(priority)) {
       throw new Error('priority must be a number');
     }
     function wrappedCallback() {
@@ -42736,7 +41468,7 @@
    * @param {EventBusEventCallback} [callback]
    */
   EventBus.prototype.off = function (events, callback) {
-    events = isArray$3(events) ? events : [events];
+    events = isArray$2(events) ? events : [events];
     var self = this;
     events.forEach(function (event) {
       self._removeListener(event, callback);
@@ -43351,123 +42083,7 @@
    * @returns {Array<FormRow>}
    */
   function allRows(formRows) {
-    return flatten$3(formRows.map(c => c.rows));
-  }
-
-  // config  ///////////////////
-
-  const MINUTES_IN_DAY = 60 * 24;
-  const DATETIME_SUBTYPES = {
-    DATE: 'date',
-    TIME: 'time',
-    DATETIME: 'datetime'
-  };
-  const TIME_SERIALISING_FORMATS = {
-    UTC_OFFSET: 'utc_offset',
-    UTC_NORMALIZED: 'utc_normalized',
-    NO_TIMEZONE: 'no_timezone'
-  };
-  const DATETIME_SUBTYPE_PATH = ['subtype'];
-  const DATE_LABEL_PATH = ['dateLabel'];
-
-  function createInjector(bootstrapModules) {
-    const injector = new Injector(bootstrapModules);
-    injector.init();
-    return injector;
-  }
-
-  /**
-   * @param {string?} prefix
-   *
-   * @returns Element
-   */
-  function createFormContainer(prefix = 'fjs') {
-    const container = document.createElement('div');
-    container.classList.add(`${prefix}-container`);
-    return container;
-  }
-
-  const EXPRESSION_PROPERTIES = ['alt', 'appearance.prefixAdorner', 'appearance.suffixAdorner', 'conditional.hide', 'description', 'label', 'source', 'readonly', 'text', 'validate.min', 'validate.max', 'validate.minLength', 'validate.maxLength', 'valuesExpression'];
-  const TEMPLATE_PROPERTIES = ['alt', 'appearance.prefixAdorner', 'appearance.suffixAdorner', 'description', 'label', 'source', 'text'];
-  function findErrors(errors, path) {
-    return errors[pathStringify(path)];
-  }
-  function pathStringify(path) {
-    if (!path) {
-      return '';
-    }
-    return path.join('.');
-  }
-  const indices = {};
-  function generateIndexForType(type) {
-    if (type in indices) {
-      indices[type]++;
-    } else {
-      indices[type] = 1;
-    }
-    return indices[type];
-  }
-  function generateIdForType(type) {
-    return `${type}${generateIndexForType(type)}`;
-  }
-
-  /**
-   * @template T
-   * @param {T} data
-   * @param {(this: any, key: string, value: any) => any} [replacer]
-   * @return {T}
-   */
-  function clone(data, replacer) {
-    return JSON.parse(JSON.stringify(data, replacer));
-  }
-
-  /**
-   * Parse the schema for input variables a form might make use of
-   *
-   * @param {any} schema
-   *
-   * @return {string[]}
-   */
-  function getSchemaVariables(schema, expressionLanguage = new FeelExpressionLanguage(null), templating = new FeelersTemplating()) {
-    if (!schema.components) {
-      return [];
-    }
-    const variables = schema.components.reduce((variables, component) => {
-      const {
-        key,
-        valuesKey,
-        type
-      } = component;
-      if (['button'].includes(type)) {
-        return variables;
-      }
-      if (key) {
-        variables = [...variables, key];
-      }
-      if (valuesKey) {
-        variables = [...variables, valuesKey];
-      }
-      EXPRESSION_PROPERTIES.forEach(prop => {
-        const property = get(component, prop.split('.'));
-        if (property && expressionLanguage.isExpression(property)) {
-          const expressionVariables = expressionLanguage.getVariableNames(property, {
-            type: 'expression'
-          });
-          variables = [...variables, ...expressionVariables];
-        }
-      });
-      TEMPLATE_PROPERTIES.forEach(prop => {
-        const property = get(component, prop.split('.'));
-        if (property && !expressionLanguage.isExpression(property) && templating.isTemplate(property)) {
-          const templateVariables = templating.getVariableNames(property);
-          variables = [...variables, ...templateVariables];
-        }
-      });
-      return variables;
-    }, []);
-
-    // remove duplicates
-    return Array.from(new Set(variables));
+    return flatten$2(formRows.map(c => c.rows));
   }
 
   class Importer {
@@ -43644,7 +42260,7 @@
     return `fjs-form-${id}`;
   }
 
-  const type$b = 'button';
+  const type$c = 'button';
   function Button(props) {
     const {
       disabled,
@@ -43654,7 +42270,7 @@
       action = 'submit'
     } = field;
     return e$2("div", {
-      class: formFieldClasses(type$b),
+      class: formFieldClasses(type$c),
       children: e$2("button", {
         class: "fjs-button",
         type: action,
@@ -43664,7 +42280,7 @@
     });
   }
   Button.config = {
-    type: type$b,
+    type: type$c,
     keyed: true,
     label: 'Button',
     group: 'action',
@@ -43924,11 +42540,12 @@
     });
   }
 
-  const type$a = 'checkbox';
+  const type$b = 'checkbox';
   function Checkbox(props) {
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       readonly,
       value = false
@@ -43955,7 +42572,7 @@
     } = F(FormContext$1);
     const errorMessageId = errors.length === 0 ? undefined : `${prefixId(id, formId)}-error-message`;
     return e$2("div", {
-      class: classNames(formFieldClasses(type$a, {
+      class: classNames(formFieldClasses(type$b, {
         errors,
         disabled,
         readonly
@@ -43974,6 +42591,7 @@
           id: prefixId(id, formId),
           type: "checkbox",
           onChange: onChange,
+          onBlur: onBlur,
           "aria-describedby": errorMessageId
         })
       }), e$2(Description, {
@@ -43985,7 +42603,7 @@
     });
   }
   Checkbox.config = {
-    type: type$a,
+    type: type$b,
     keyed: true,
     label: 'Checkbox',
     group: 'selection',
@@ -44156,7 +42774,7 @@
       const digits = workingString.match(/\d+/g);
       const displayHour = parseInt(digits && digits[0]);
       const minute = parseInt(digits && digits[1]) || 0;
-      const isValidDisplayHour = isNumber$3(displayHour) && displayHour >= 1 && displayHour <= 12;
+      const isValidDisplayHour = isNumber$2(displayHour) && displayHour >= 1 && displayHour <= 12;
       const isValidMinute = minute >= 0 && minute <= 59;
       if (!isValidDisplayHour || !isValidMinute) return null;
       const hour = displayHour % 12 + (isPM ? 12 : 0);
@@ -44165,8 +42783,8 @@
       const digits = workingString.match(/\d+/g);
       const hour = parseInt(digits && digits[0]);
       const minute = parseInt(digits && digits[1]);
-      const isValidHour = isNumber$3(hour) && hour >= 0 && hour <= 23;
-      const isValidMinute = isNumber$3(minute) && minute >= 0 && minute <= 59;
+      const isValidHour = isNumber$2(hour) && hour >= 0 && hour <= 23;
+      const isValidMinute = isNumber$2(minute) && minute >= 0 && minute <= 59;
       if (!isValidHour || !isValidMinute) return null;
       return hour * 60 + minute;
     }
@@ -44328,11 +42946,12 @@
     }
   }
 
-  const type$9 = 'checklist';
+  const type$a = 'checklist';
   function Checklist(props) {
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       readonly,
       value = []
@@ -44343,6 +42962,7 @@
       label,
       validate = {}
     } = field;
+    const outerDivRef = s();
     const {
       required
     } = validate;
@@ -44358,6 +42978,12 @@
         value: newValue
       });
     };
+    const onCheckboxBlur = e => {
+      if (outerDivRef.current.contains(e.relatedTarget)) {
+        return;
+      }
+      onBlur();
+    };
     const {
       state: loadState,
       values: options
@@ -44367,11 +42993,12 @@
     } = F(FormContext$1);
     const errorMessageId = errors.length === 0 ? undefined : `${prefixId(id, formId)}-error-message`;
     return e$2("div", {
-      class: classNames(formFieldClasses(type$9, {
+      class: classNames(formFieldClasses(type$a, {
         errors,
         disabled,
         readonly
       })),
+      ref: outerDivRef,
       children: [e$2(Label, {
         label: label,
         required: required
@@ -44391,6 +43018,7 @@
             id: prefixId(`${id}-${index}`, formId),
             type: "checkbox",
             onClick: () => toggleCheckbox(v.value),
+            onBlur: onCheckboxBlur,
             "aria-describedby": errorMessageId
           })
         }, `${id}-${index}`);
@@ -44403,7 +43031,7 @@
     });
   }
   Checklist.config = {
-    type: type$9,
+    type: type$a,
     keyed: true,
     label: 'Checklist',
     group: 'selection',
@@ -44433,8 +43061,10 @@
       onChange
     } = props;
     const formFields = useService('formFields'),
+      viewerCommands = useService('viewerCommands', false),
       form = useService('form');
     const {
+      initialData,
       data,
       errors,
       properties
@@ -44448,12 +43078,23 @@
     if (!FormFieldComponent) {
       throw new Error(`cannot render field <${field.type}>`);
     }
+    const initialValue = d(() => get(initialData, field._path), [initialData, field._path]);
     const value = get(data, field._path);
     const fieldErrors = findErrors(errors, field._path);
     const readonly = useReadonly(field, properties);
 
     // add precedence: global readonly > form field disabled
     const disabled = !properties.readOnly && (properties.disabled || field.disabled || false);
+    const onBlur = A$1(() => {
+      if (viewerCommands) {
+        viewerCommands.updateFieldValidation(field, value);
+      }
+    }, [viewerCommands, field, value]);
+    y(() => {
+      if (viewerCommands && initialValue) {
+        viewerCommands.updateFieldValidation(field, initialValue);
+      }
+    }, [viewerCommands, field, initialValue]);
     const hidden = useCondition(field.conditional && field.conditional.hide || null);
     if (hidden) {
       return e$2(Empty, {});
@@ -44469,6 +43110,7 @@
           disabled: disabled,
           errors: fieldErrors,
           onChange: disabled || readonly ? noop$1 : onChange,
+          onBlur: disabled || readonly ? noop$1 : onBlur,
           readonly: readonly,
           value: value
         })
@@ -44531,16 +43173,16 @@
     })
   };
 
-  var _path$g;
-  function _extends$j() { _extends$j = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$j.apply(this, arguments); }
+  var _path$h;
+  function _extends$k() { _extends$k = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$k.apply(this, arguments); }
   var SvgCalendar = function SvgCalendar(props) {
-    return /*#__PURE__*/v$1("svg", _extends$j({
+    return /*#__PURE__*/v$1("svg", _extends$k({
       xmlns: "http://www.w3.org/2000/svg",
       width: 14,
       height: 15,
       fill: "none",
       viewBox: "0 0 28 30"
-    }, props), _path$g || (_path$g = /*#__PURE__*/v$1("path", {
+    }, props), _path$h || (_path$h = /*#__PURE__*/v$1("path", {
       fill: "currentColor",
       fillRule: "evenodd",
       d: "M19 2H9V0H7v2H2a2 2 0 0 0-2 2v24a2 2 0 0 0 2 2h24a2 2 0 0 0 2-2V4a2 2 0 0 0-2-2h-5V0h-2v2ZM7 7V4H2v5h24V4h-5v3h-2V4H9v3H7Zm-5 4v17h24V11H2Z",
@@ -44572,14 +43214,14 @@
       children: [pre && e$2("span", {
         class: "fjs-input-adornment border-right border-radius-left",
         onClick: onAdornmentClick,
-        children: [" ", isString$3(pre) ? e$2("span", {
+        children: [" ", isString$2(pre) ? e$2("span", {
           class: "fjs-input-adornment-text",
           children: pre
         }) : pre, " "]
       }), children, post && e$2("span", {
         class: "fjs-input-adornment border-left border-radius-right",
         onClick: onAdornmentClick,
-        children: [" ", isString$3(post) ? e$2("span", {
+        children: [" ", isString$2(post) ? e$2("span", {
           class: "fjs-input-adornment-text",
           children: post
         }) : post, " "]
@@ -44592,6 +43234,7 @@
       id,
       label,
       collapseLabelOnEmpty,
+      onDateTimeBlur,
       formId,
       required,
       disabled,
@@ -44686,7 +43329,8 @@
       if (!isInputDirty || e.relatedTarget && e.relatedTarget.classList.contains('flatpickr-day')) return;
       dateInputRef.current.dispatchEvent(ENTER_KEYDOWN_EVENT);
       setIsInputDirty(false);
-    }, [isInputDirty]);
+      onDateTimeBlur(e);
+    }, [isInputDirty, onDateTimeBlur]);
     const fullId = `${prefixId(id, formId)}--date`;
     return e$2("div", {
       class: "fjs-datetime-subsection",
@@ -44728,19 +43372,19 @@
     });
   }
 
-  var _path$f, _path2$3;
-  function _extends$i() { _extends$i = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$i.apply(this, arguments); }
+  var _path$g, _path2$4;
+  function _extends$j() { _extends$j = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$j.apply(this, arguments); }
   var SvgClock = function SvgClock(props) {
-    return /*#__PURE__*/v$1("svg", _extends$i({
+    return /*#__PURE__*/v$1("svg", _extends$j({
       xmlns: "http://www.w3.org/2000/svg",
       width: 16,
       height: 16,
       fill: "none",
       viewBox: "0 0 28 29"
-    }, props), _path$f || (_path$f = /*#__PURE__*/v$1("path", {
+    }, props), _path$g || (_path$g = /*#__PURE__*/v$1("path", {
       fill: "currentColor",
       d: "M13 14.41 18.59 20 20 18.59l-5-5.01V5h-2v9.41Z"
-    })), _path2$3 || (_path2$3 = /*#__PURE__*/v$1("path", {
+    })), _path2$4 || (_path2$4 = /*#__PURE__*/v$1("path", {
       fill: "currentColor",
       fillRule: "evenodd",
       d: "M6.222 25.64A14 14 0 1 0 21.778 2.36 14 14 0 0 0 6.222 25.64ZM7.333 4.023a12 12 0 1 1 13.334 19.955A12 12 0 0 1 7.333 4.022Z",
@@ -44849,6 +43493,7 @@
       id,
       label,
       collapseLabelOnEmpty,
+      onDateTimeBlur,
       formId,
       required,
       disabled,
@@ -44893,7 +43538,7 @@
       const minutes = parseInputTime(localRawValue);
 
       // If raw string couldn't be parsed, clean everything up
-      if (!isNumber$3(minutes)) {
+      if (!isNumber$2(minutes)) {
         setRawValue('');
         setTime(null);
         return;
@@ -44948,6 +43593,7 @@
     const onInputBlur = e => {
       setDropdownIsOpen(false);
       propagateRawToMinute();
+      onDateTimeBlur(e);
     };
     const onDropdownValueSelected = value => {
       setDropdownIsOpen(false);
@@ -45003,11 +43649,12 @@
     });
   }
 
-  const type$8 = 'datetime';
+  const type$9 = 'datetime';
   function Datetime(props) {
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       onChange,
       readonly,
@@ -45031,6 +43678,7 @@
     const {
       formId
     } = F(FormContext$1);
+    const dateTimeGroupRef = s();
     const getNullDateTime = () => ({
       date: new Date(Date.parse(null)),
       time: null
@@ -45041,6 +43689,12 @@
     const isValidTime = time => !isNaN(parseInt(time));
     const useDatePicker = d(() => subtype === DATETIME_SUBTYPES.DATE || subtype === DATETIME_SUBTYPES.DATETIME, [subtype]);
     const useTimePicker = d(() => subtype === DATETIME_SUBTYPES.TIME || subtype === DATETIME_SUBTYPES.DATETIME, [subtype]);
+    const onDateTimeBlur = A$1(e => {
+      if (e.relatedTarget && dateTimeGroupRef.current.contains(e.relatedTarget)) {
+        return;
+      }
+      onBlur();
+    }, [onBlur]);
     y(() => {
       let {
         date,
@@ -45132,6 +43786,7 @@
       id,
       label: dateLabel,
       collapseLabelOnEmpty: !timeLabel,
+      onDateTimeBlur,
       formId,
       required,
       disabled,
@@ -45145,6 +43800,7 @@
       id,
       label: timeLabel,
       collapseLabelOnEmpty: !dateLabel,
+      onDateTimeBlur,
       formId,
       required,
       disabled,
@@ -45156,13 +43812,14 @@
       'aria-describedby': errorMessageId
     };
     return e$2("div", {
-      class: formFieldClasses(type$8, {
+      class: formFieldClasses(type$9, {
         errors: allErrors,
         disabled,
         readonly
       }),
       children: [e$2("div", {
         class: classNames('fjs-vertical-group'),
+        ref: dateTimeGroupRef,
         children: [useDatePicker && e$2(Datepicker, {
           ...datePickerProps
         }), useTimePicker && useDatePicker && e$2("div", {
@@ -45179,7 +43836,7 @@
     });
   }
   Datetime.config = {
-    type: type$8,
+    type: type$9,
     keyed: true,
     label: 'Date time',
     group: 'basic-input',
@@ -45448,9 +44105,9 @@
     return true;
   }
 
-  function _extends$h() { _extends$h = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$h.apply(this, arguments); }
+  function _extends$i() { _extends$i = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$i.apply(this, arguments); }
   var SvgImagePlaceholder = function SvgImagePlaceholder(props) {
-    return /*#__PURE__*/v$1("svg", _extends$h({
+    return /*#__PURE__*/v$1("svg", _extends$i({
       xmlns: "http://www.w3.org/2000/svg",
       xmlSpace: "preserve",
       width: 64,
@@ -45489,7 +44146,7 @@
   };
   var ImagePlaceholder = SvgImagePlaceholder;
 
-  const type$7 = 'image';
+  const type$8 = 'image';
   function Image(props) {
     const {
       field
@@ -45510,7 +44167,7 @@
       formId
     } = F(FormContext$1);
     return e$2("div", {
-      class: formFieldClasses(type$7),
+      class: formFieldClasses(type$8),
       children: e$2("div", {
         class: "fjs-image-container",
         children: [safeSource && e$2("img", {
@@ -45528,7 +44185,7 @@
     });
   }
   Image.config = {
-    type: type$7,
+    type: type$8,
     keyed: false,
     label: 'Image view',
     group: 'presentation',
@@ -45555,14 +44212,14 @@
     });
   }
 
-  var _path$e;
-  function _extends$g() { _extends$g = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$g.apply(this, arguments); }
+  var _path$f;
+  function _extends$h() { _extends$h = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$h.apply(this, arguments); }
   var SvgAngelDown = function SvgAngelDown(props) {
-    return /*#__PURE__*/v$1("svg", _extends$g({
+    return /*#__PURE__*/v$1("svg", _extends$h({
       xmlns: "http://www.w3.org/2000/svg",
       width: 8,
       height: 8
-    }, props), _path$e || (_path$e = /*#__PURE__*/v$1("path", {
+    }, props), _path$f || (_path$f = /*#__PURE__*/v$1("path", {
       fill: "currentColor",
       fillRule: "evenodd",
       stroke: "currentColor",
@@ -45573,14 +44230,14 @@
   };
   var AngelDownIcon = SvgAngelDown;
 
-  var _path$d;
-  function _extends$f() { _extends$f = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$f.apply(this, arguments); }
+  var _path$e;
+  function _extends$g() { _extends$g = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$g.apply(this, arguments); }
   var SvgAngelUp = function SvgAngelUp(props) {
-    return /*#__PURE__*/v$1("svg", _extends$f({
+    return /*#__PURE__*/v$1("svg", _extends$g({
       xmlns: "http://www.w3.org/2000/svg",
       width: 8,
       height: 8
-    }, props), _path$d || (_path$d = /*#__PURE__*/v$1("path", {
+    }, props), _path$e || (_path$e = /*#__PURE__*/v$1("path", {
       fill: "currentColor",
       fillRule: "evenodd",
       stroke: "currentColor",
@@ -45591,11 +44248,12 @@
   };
   var AngelUpIcon = SvgAngelUp;
 
-  const type$6 = 'number';
+  const type$7 = 'number';
   function Numberfield(props) {
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       value,
       readonly,
@@ -45728,7 +44386,7 @@
     } = F(FormContext$1);
     const errorMessageId = errors.length === 0 ? undefined : `${prefixId(id, formId)}-error-message`;
     return e$2("div", {
-      class: formFieldClasses(type$6, {
+      class: formFieldClasses(type$7, {
         errors,
         disabled,
         readonly
@@ -45756,7 +44414,8 @@
             readOnly: readonly,
             id: prefixId(id, formId),
             onKeyDown: onKeyDown,
-            onKeyPress: onKeyPress
+            onKeyPress: onKeyPress,
+            onBlur: onBlur
 
             // @ts-ignore
             ,
@@ -45799,7 +44458,7 @@
     });
   }
   Numberfield.config = {
-    type: type$6,
+    type: type$7,
     keyed: true,
     label: 'Number',
     group: 'basic-input',
@@ -45822,11 +44481,12 @@
     })
   };
 
-  const type$5 = 'radio';
+  const type$6 = 'radio';
   function Radio(props) {
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       readonly,
       value
@@ -45837,6 +44497,7 @@
       label,
       validate = {}
     } = field;
+    const outerDivRef = s();
     const {
       required
     } = validate;
@@ -45846,6 +44507,12 @@
         value: v
       });
     };
+    const onRadioBlur = e => {
+      if (outerDivRef.current.contains(e.relatedTarget)) {
+        return;
+      }
+      onBlur();
+    };
     const {
       state: loadState,
       values: options
@@ -45855,11 +44522,12 @@
     } = F(FormContext$1);
     const errorMessageId = errors.length === 0 ? undefined : `${prefixId(id, formId)}-error-message`;
     return e$2("div", {
-      class: formFieldClasses(type$5, {
+      class: formFieldClasses(type$6, {
         errors,
         disabled,
         readonly
       }),
+      ref: outerDivRef,
       children: [e$2(Label, {
         label: label,
         required: required
@@ -45879,6 +44547,7 @@
             id: prefixId(`${id}-${index}`, formId),
             type: "radio",
             onClick: () => onChange(option.value),
+            onBlur: onRadioBlur,
             "aria-describedby": errorMessageId
           })
         }, `${id}-${index}`);
@@ -45891,7 +44560,7 @@
     });
   }
   Radio.config = {
-    type: type$5,
+    type: type$6,
     keyed: true,
     label: 'Radio',
     group: 'selection',
@@ -45914,14 +44583,14 @@
     }
   };
 
-  var _path$c;
-  function _extends$e() { _extends$e = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$e.apply(this, arguments); }
+  var _path$d;
+  function _extends$f() { _extends$f = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends$f.apply(this, arguments); }
   var SvgXMark = function SvgXMark(props) {
-    return /*#__PURE__*/v$1("svg", _extends$e({
+    return /*#__PURE__*/v$1("svg", _extends$f({
       xmlns: "http://www.w3.org/2000/svg",
       width: 8,
       height: 8
-    }, props), _path$c || (_path$c = /*#__PURE__*/v$1("path", {
+    }, props), _path$d || (_path$d = /*#__PURE__*/v$1("path", {
       fill: "currentColor",
       fillRule: "evenodd",
       stroke: "currentColor",
@@ -45937,6 +44606,7 @@
       id,
       disabled,
       errors,
+      onBlur,
       field,
       readonly,
       value
@@ -46056,6 +44726,7 @@
           onBlur: () => {
             setIsDropdownExpanded(false);
             setFilter(valueLabel);
+            onBlur();
           },
           "aria-describedby": props['aria-describedby']
         }), displayState.displayCross && e$2("span", {
@@ -46090,6 +44761,7 @@
       id,
       disabled,
       errors,
+      onBlur,
       field,
       readonly,
       value
@@ -46144,7 +44816,10 @@
           'hasErrors': errors.length
         }),
         onFocus: () => setIsDropdownExpanded(true),
-        onBlur: () => setIsDropdownExpanded(false),
+        onBlur: () => {
+          setIsDropdownExpanded(false);
+          onBlur();
+        },
         onMouseDown: onMouseDown,
         children: [e$2("div", {
           class: classNames('fjs-select-display', {
@@ -46186,11 +44861,12 @@
     });
   }
 
-  const type$4 = 'select';
+  const type$5 = 'select';
   function Select(props) {
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       onChange,
       readonly,
@@ -46214,14 +44890,15 @@
       id,
       disabled,
       errors,
+      onBlur,
       field,
       value,
       onChange,
       readonly,
       'aria-describedby': errorMessageId
-    }), [disabled, errors, field, id, value, onChange, readonly, errorMessageId]);
+    }), [disabled, errors, field, id, value, onChange, onBlur, readonly, errorMessageId]);
     return e$2("div", {
-      class: formFieldClasses(type$4, {
+      class: formFieldClasses(type$5, {
         errors,
         disabled,
         readonly
@@ -46249,7 +44926,7 @@
     });
   }
   Select.config = {
-    type: type$4,
+    type: type$5,
     keyed: true,
     label: 'Select',
     group: 'selection',
@@ -46272,11 +44949,38 @@
     }
   };
 
+  const type$4 = 'spacer';
+  function Spacer(props) {
+    const {
+      field
+    } = props;
+    const {
+      height = 60
+    } = field;
+    return e$2("div", {
+      class: formFieldClasses(type$4),
+      style: {
+        height: height
+      }
+    });
+  }
+  Spacer.config = {
+    type: type$4,
+    keyed: false,
+    label: 'Spacer',
+    group: 'presentation',
+    create: (options = {}) => ({
+      height: 60,
+      ...options
+    })
+  };
+
   const type$3 = 'taglist';
   function Taglist(props) {
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       readonly,
       value: values = []
@@ -46369,9 +45073,10 @@
           break;
       }
     };
-    const onBlur = () => {
+    const onComponentBlur = () => {
       setIsDropdownExpanded(false);
       setFilter('');
+      onBlur();
     };
     const onTagRemoveClick = (event, value) => {
       const {
@@ -46442,9 +45147,7 @@
           onKeyDown: onInputKeyDown,
           onMouseDown: () => setIsEscapeClose(false),
           onFocus: () => !readonly && setIsDropdownExpanded(true),
-          onBlur: () => {
-            !readonly && onBlur();
-          },
+          onBlur: () => !readonly && onComponentBlur(),
           "aria-describedby": errorMessageId
         })]
       }), e$2("div", {
@@ -46577,6 +45280,7 @@
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       readonly,
       value = ''
@@ -46628,6 +45332,7 @@
           readOnly: readonly,
           id: prefixId(id, formId),
           onInput: onChange,
+          onBlur: onBlur,
           type: "text",
           value: value,
           "aria-describedby": errorMessageId
@@ -46649,7 +45354,7 @@
     sanitizeValue: ({
       value
     }) => {
-      if (isArray$3(value) || isObject(value)) {
+      if (isArray$2(value) || isObject(value)) {
         return '';
       }
 
@@ -46669,6 +45374,7 @@
     const {
       disabled,
       errors = [],
+      onBlur,
       field,
       readonly,
       value = ''
@@ -46691,22 +45397,12 @@
         value: target.value
       });
     };
-    const autoSizeTextarea = A$1(textarea => {
-      // Ensures the textarea shrinks back, and improves resizing behavior consistency
-      textarea.style.height = '0px';
-      const computed = window.getComputedStyle(textarea);
-      const calculatedHeight = parseInt(computed.getPropertyValue('border-top-width')) + parseInt(computed.getPropertyValue('padding-top')) + textarea.scrollHeight + parseInt(computed.getPropertyValue('padding-bottom')) + parseInt(computed.getPropertyValue('border-bottom-width'));
-      const minHeight = 75;
-      const maxHeight = 350;
-      const displayHeight = Math.max(Math.min(calculatedHeight, maxHeight), minHeight);
-      textarea.style.height = `${displayHeight}px`;
-
-      // Overflow is hidden by default to hide scrollbar flickering
-      textarea.style.overflow = calculatedHeight > maxHeight ? 'visible' : 'hidden';
-    }, []);
+    h(() => {
+      autoSizeTextarea(textareaRef.current);
+    }, [value]);
     y(() => {
       autoSizeTextarea(textareaRef.current);
-    }, [autoSizeTextarea, value]);
+    }, []);
     const {
       formId
     } = F(FormContext$1);
@@ -46727,6 +45423,7 @@
         readonly: readonly,
         id: prefixId(id, formId),
         onInput: onInput,
+        onBlur: onBlur,
         value: value,
         ref: textareaRef,
         "aria-describedby": errorMessageId
@@ -46746,13 +45443,31 @@
     emptyValue: '',
     sanitizeValue: ({
       value
-    }) => isArray$3(value) || isObject(value) ? '' : String(value),
+    }) => isArray$2(value) || isObject(value) ? '' : String(value),
     create: (options = {}) => ({
       ...options
     })
   };
+  const autoSizeTextarea = textarea => {
+    // Ensures the textarea shrinks back, and improves resizing behavior consistency
+    textarea.style.height = '0px';
+    const computed = window.getComputedStyle(textarea);
+    const heightFromLines = () => {
+      const lineHeight = parseInt(computed.getPropertyValue('line-height').replace('px', '')) || 0;
+      const lines = textarea.value ? textarea.value.toString().split('\n').length : 0;
+      return lines * lineHeight;
+    };
+    const calculatedHeight = parseInt(computed.getPropertyValue('border-top-width')) + parseInt(computed.getPropertyValue('padding-top')) + (textarea.scrollHeight || heightFromLines()) + parseInt(computed.getPropertyValue('padding-bottom')) + parseInt(computed.getPropertyValue('border-bottom-width'));
+    const minHeight = 75;
+    const maxHeight = 350;
+    const displayHeight = Math.max(Math.min(calculatedHeight || 0, maxHeight), minHeight);
+    textarea.style.height = `${displayHeight}px`;
+
+    // Overflow is hidden by default to hide scrollbar flickering
+    textarea.style.overflow = calculatedHeight > maxHeight ? 'visible' : 'hidden';
+  };
 
-  const formFields = [Button, Checkbox, Checklist, Default, Image, Numberfield, Datetime, Radio, Select, Taglist, Text, Textfield, Textarea];
+  const formFields = [Button, Checkbox, Checklist, Default, Image, Numberfield, Datetime, Radio, Select, Spacer, Taglist, Text, Textfield, Textarea];
 
   class FormFields {
     constructor() {
@@ -46835,55 +45550,55 @@
     validator: ['type', Validator]
   };
 
-  /**
-   * @typedef { import('./types').Injector } Injector
-   * @typedef { import('./types').Data } Data
-   * @typedef { import('./types').Errors } Errors
-   * @typedef { import('./types').Schema } Schema
-   * @typedef { import('./types').FormProperties } FormProperties
-   * @typedef { import('./types').FormProperty } FormProperty
-   * @typedef { import('./types').FormEvent } FormEvent
-   * @typedef { import('./types').FormOptions } FormOptions
-   *
-   * @typedef { {
-   *   data: Data,
-   *   initialData: Data,
-   *   errors: Errors,
-   *   properties: FormProperties,
-   *   schema: Schema
-   * } } State
-   *
-   * @typedef { (type:FormEvent, priority:number, handler:Function) => void } OnEventWithPriority
-   * @typedef { (type:FormEvent, handler:Function) => void } OnEventWithOutPriority
-   * @typedef { OnEventWithPriority & OnEventWithOutPriority } OnEventType
+  /**
+   * @typedef { import('./types').Injector } Injector
+   * @typedef { import('./types').Data } Data
+   * @typedef { import('./types').Errors } Errors
+   * @typedef { import('./types').Schema } Schema
+   * @typedef { import('./types').FormProperties } FormProperties
+   * @typedef { import('./types').FormProperty } FormProperty
+   * @typedef { import('./types').FormEvent } FormEvent
+   * @typedef { import('./types').FormOptions } FormOptions
+   *
+   * @typedef { {
+   *   data: Data,
+   *   initialData: Data,
+   *   errors: Errors,
+   *   properties: FormProperties,
+   *   schema: Schema
+   * } } State
+   *
+   * @typedef { (type:FormEvent, priority:number, handler:Function) => void } OnEventWithPriority
+   * @typedef { (type:FormEvent, handler:Function) => void } OnEventWithOutPriority
+   * @typedef { OnEventWithPriority & OnEventWithOutPriority } OnEventType
    */
 
   const ids = new Ids([32, 36, 1]);
 
-  /**
-   * The form.
+  /**
+   * The form.
    */
   class Form {
-    /**
-     * @constructor
-     * @param {FormOptions} options
+    /**
+     * @constructor
+     * @param {FormOptions} options
      */
     constructor(options = {}) {
-      /**
-       * @public
-       * @type {OnEventType}
+      /**
+       * @public
+       * @type {OnEventType}
        */
       this.on = this._onEvent;
 
-      /**
-       * @public
-       * @type {String}
+      /**
+       * @public
+       * @type {String}
        */
       this._id = ids.next();
 
-      /**
-       * @private
-       * @type {Element}
+      /**
+       * @private
+       * @type {Element}
        */
       this._container = createFormContainer();
       const {
@@ -46892,9 +45607,9 @@
         properties = {}
       } = options;
 
-      /**
-       * @private
-       * @type {State}
+      /**
+       * @private
+       * @type {State}
        */
       this._state = {
         initialData: null,
@@ -46918,9 +45633,9 @@
       this._emit('form.clear');
     }
 
-    /**
-     * Destroy the form, removing it from DOM,
-     * if attached.
+    /**
+     * Destroy the form, removing it from DOM,
+     * if attached.
      */
     destroy() {
       // destroy form services
@@ -46931,13 +45646,13 @@
       this._detach(false);
     }
 
-    /**
-     * Open a form schema with the given initial data.
-     *
-     * @param {Schema} schema
-     * @param {Data} [data]
-     *
-     * @return Promise<{ warnings: Array<any> }>
+    /**
+     * Open a form schema with the given initial data.
+     *
+     * @param {Schema} schema
+     * @param {Data} [data]
+     *
+     * @return Promise<{ warnings: Array<any> }>
      */
     importSchema(schema, data = {}) {
       return new Promise((resolve, reject) => {
@@ -46970,10 +45685,10 @@
       });
     }
 
-    /**
-     * Submit the form, triggering all field validations.
-     *
-     * @returns { { data: Data, errors: Errors } }
+    /**
+     * Submit the form, triggering all field validations.
+     *
+     * @returns { { data: Data, errors: Errors } }
      */
     submit() {
       const {
@@ -47000,8 +45715,8 @@
       });
     }
 
-    /**
-     * @returns {Errors}
+    /**
+     * @returns {Errors}
      */
     validate() {
       const formFieldRegistry = this.get('formFieldRegistry'),
@@ -47027,15 +45742,15 @@
       return errors;
     }
 
-    /**
-     * @param {Element|string} parentNode
+    /**
+     * @param {Element|string} parentNode
      */
     attachTo(parentNode) {
       if (!parentNode) {
         throw new Error('parentNode required');
       }
       this.detach();
-      if (isString$3(parentNode)) {
+      if (isString$2(parentNode)) {
         parentNode = document.querySelector(parentNode);
       }
       const container = this._container;
@@ -47046,10 +45761,10 @@
       this._detach();
     }
 
-    /**
-     * @private
-     *
-     * @param {boolean} [emit]
+    /**
+     * @private
+     *
+     * @param {boolean} [emit]
      */
     _detach(emit = true) {
       const container = this._container,
@@ -47063,9 +45778,9 @@
       parentNode.removeChild(container);
     }
 
-    /**
-     * @param {FormProperty} property
-     * @param {any} value
+    /**
+     * @param {FormProperty} property
+     * @param {any} value
      */
     setProperty(property, value) {
       const properties = set(this._getState().properties, [property], value);
@@ -47074,21 +45789,21 @@
       });
     }
 
-    /**
-     * @param {FormEvent} type
-     * @param {Function} handler
+    /**
+     * @param {FormEvent} type
+     * @param {Function} handler
      */
     off(type, handler) {
       this.get('eventBus').off(type, handler);
     }
 
-    /**
-     * @private
-     *
-     * @param {FormOptions} options
-     * @param {Element} container
-     *
-     * @returns {Injector}
+    /**
+     * @private
+     *
+     * @param {FormOptions} options
+     * @param {Element} container
+     *
+     * @returns {Injector}
      */
     _createInjector(options, container) {
       const {
@@ -47107,17 +45822,17 @@
       }, core, ...modules, ...additionalModules]);
     }
 
-    /**
-     * @private
+    /**
+     * @private
      */
     _emit(type, data) {
       this.get('eventBus').fire(type, data);
     }
 
-    /**
-     * @internal
-     *
-     * @param { { add?: boolean, field: any, remove?: number, value?: any } } update
+    /**
+     * @internal
+     *
+     * @param { { add?: boolean, field: any, remove?: number, value?: any } } update
      */
     _update(update) {
       const {
@@ -47141,15 +45856,15 @@
       });
     }
 
-    /**
-     * @internal
+    /**
+     * @internal
      */
     _getState() {
       return this._state;
     }
 
-    /**
-     * @internal
+    /**
+     * @internal
      */
     _setState(state) {
       this._state = {
@@ -47159,22 +45874,22 @@
       this._emit('changed', this._getState());
     }
 
-    /**
-    * @internal
+    /**
+    * @internal
     */
     _getModules() {
-      return [ExpressionLanguageModule, MarkdownModule];
+      return [ExpressionLanguageModule, MarkdownModule, ViewerCommandsModule];
     }
 
-    /**
-     * @internal
+    /**
+     * @internal
      */
     _onEvent(type, priority, handler) {
       this.get('eventBus').on(type, priority, handler);
     }
 
-    /**
-     * @internal
+    /**
+     * @internal
      */
     _getSubmitData() {
       const formFieldRegistry = this.get('formFieldRegistry');
@@ -47199,8 +45914,8 @@
       return filteredSubmitData;
     }
 
-    /**
-     * @internal
+    /**
+     * @internal
      */
     _applyConditions(toFilter, data) {
       const conditionChecker = this.get('conditionChecker');
@@ -47208,18 +45923,18 @@
     }
   }
 
-  const schemaVersion = 9;
+  const schemaVersion = 10;
 
-  /**
-   * @typedef { import('./types').CreateFormOptions } CreateFormOptions
+  /**
+   * @typedef { import('./types').CreateFormOptions } CreateFormOptions
    */
 
-  /**
-   * Create a form.
-   *
-   * @param {CreateFormOptions} options
-   *
-   * @return {Promise<Form>}
+  /**
+   * Create a form.
+   *
+   * @param {CreateFormOptions} options
+   *
+   * @return {Promise<Form>}
    */
   function createForm(options) {
     const {
@@ -47238,4 +45953,4 @@
   exports.getSchemaVariables = getSchemaVariables;
   exports.schemaVersion = schemaVersion;
 
-}));
+}));
\ No newline at end of file