SyntaxEditor: Support using two-face syntax definitions

Cargo.toml

@@ -11,19 +11,20 @@ rust-version = "1.65"
 
 [dependencies]
 fontdb = { version = "0.15.0", default-features = false }
+hashbrown = { version = "0.14.1", optional = true, default-features = false }
 libm = "0.2.8"
 log = "0.4.20"
+rangemap = "1.4.0"
+rustc-hash = { version = "1.1.0", default-features = false }
 rustybuzz = { version = "0.11.0", default-features = false, features = ["libm"] }
+self_cell = "1.0.1"
 swash = { version = "0.1.8", optional = true }
 syntect = { version = "5.1.0", optional = true }
 sys-locale = { version = "0.3.1", optional = true }
+two-face = { version = "0.3.0", optional = true }
 unicode-linebreak = "0.1.5"
 unicode-script = "0.5.5"
 unicode-segmentation = "1.10.1"
-rangemap = "1.4.0"
-hashbrown = { version = "0.14.1", optional = true, default-features = false }
-rustc-hash = { version = "1.1.0", default-features = false }
-self_cell = "1.0.1"
 
 [dependencies.unicode-bidi]
 version = "0.3.13"

src/edit/syntect.rs

@@ -22,13 +22,25 @@ pub struct SyntaxSystem {
 
 impl SyntaxSystem {
     /// Create a new [`SyntaxSystem`]
+    #[cfg(not(feature = "two-face"))]
     pub fn new() -> Self {
         Self {
             //TODO: store newlines in buffer
             syntax_set: SyntaxSet::load_defaults_nonewlines(),
             theme_set: ThemeSet::load_defaults(),
         }
     }
+
+    /// Create a new [`SyntaxSystem`] using `[two-face]` definitions
+    #[cfg(feature = "two-face")]
+    pub fn new() -> Self {
+        Self {
+            //TODO: store newlines in buffer
+            syntax_set: two_face::syntax::extra_no_newlines(),
+            //TODO: use two-face themes
+            theme_set: ThemeSet::load_defaults(),
+        }
+    }
 }
 
 /// A wrapper of [`Editor`] with syntax highlighting provided by [`SyntaxSystem`]