added support for callback after resize

README.md

@@ -17,12 +17,16 @@ Basic usage ([Interactive Demo](http://jsfiddle.net/edelman/HrnHb/)):
  - `fixMinHeight`: defaults to `true`. Set to `false` if you don't want the box to stop shrinking when it hits its initial size.
  - `cloneClass`: defaults to `'autogrowclone'`. Helper CSS class for the clone used for measuring sizes. Use this if you need to apply special rules for a textbox that is right next to the one you're autogrowing, but not exactly it so that they are identical.
  - `onInitialize`: defaults to `false`. Will trigger autogrow on init.
+ - `onResize`: defaults to `false`. Callback function, will be executed after the resize, will be passed the `event` object and the textarea object as parameters. On init, the event is undefined. If animation is enabled, it is executed after the animation completes.
 
 Example: 
 
     var opts = {
         context: $('li')
         , animate: false
         , cloneClass: 'faketextarea'
+        , onResize: function(event, textarea) {
+			'your stuff...';
+		}
     };
     $('.mytextareas').autogrow(opts);

autogrow.js

@@ -10,6 +10,7 @@
                 , fixMinHeight: true //if you don't want the box to shrink below its initial size
                 , cloneClass: 'autogrowclone' //helper CSS class for clone if you need to add special rules
                 , onInitialize: false //resizes the textareas when the plugin is initialized
+                , onResize: false //function to call after the textarea resizes
             }
         ;
         opts = $.isPlainObject(opts) ? opts : {context: opts ? opts : $(document)};
@@ -54,10 +55,17 @@
                 , newHeight = this.scrollHeight
                 , minHeight = box.data('autogrow-start-height') || 0
                 , clone
+                , self = this
+                , executeCallback = function() {
+                    if (typeof opts.onResize === 'function') {
+                        opts.onResize.call(this, e, self);
+                    }
+                    return true;
+                }
             ;
             if (oldHeight < newHeight) { //user is typing
                 this.scrollTop = 0; //try to reduce the top of the content hiding for a second
-                opts.animate ? box.stop().animate({height: newHeight}, opts.speed) : box.innerHeight(newHeight);
+                opts.animate ? box.stop().animate({height: newHeight}, opts.speed, 'swing', executeCallback) : box.innerHeight(newHeight) && executeCallback();
             } else if (!e || e.which == 8 || e.which == 46 || (e.ctrlKey && e.which == 88)) { //user is deleting, backspacing, or cutting
                 if (oldHeight > minHeight) { //shrink!
                     //this cloning part is not particularly necessary. however, it helps with animation
@@ -85,7 +93,9 @@
                     //if user selects all and deletes or holds down delete til beginning
                     //user could get here and shrink whole box
                     newHeight < minHeight && (newHeight = minHeight);
-                    oldHeight > newHeight && opts.animate ? box.stop().animate({height: newHeight}, opts.speed) : box.innerHeight(newHeight);
+                    oldHeight > newHeight && opts.animate ?
+                        box.stop().animate({height: newHeight}, opts.speed, 'swing', executeCallback) :
+                        box.innerHeight(newHeight) && executeCallback();
                 } else { //just set to the minHeight
                     box.innerHeight(minHeight);
                 }