TextArea auto-resizer jQuery plugin by James Padolsey

With some tweaks by icyleaf and some minor tweaks from me

src/scripts/tutti/00_utils.js

@@ -60,8 +60,74 @@
         });
     };
 
+    /*
+     * jQuery autoResize (textarea auto-resizer)
+     * @copyright James Padolsey http://james.padolsey.com
+     * @version 1.04
+     * cracked by icyleaf <icyleaf.cn@gmail.com>
+     * https://gist.github.com/icyleaf/269160
+     */
+    $.fn.autoResize = function(options) {
+        var settings = $.extend({
+            onResize : function(){},
+            animate : true,
+            animateDuration : 0,
+            animateCallback : function(){},
+            extraSpace : 20,
+            limit: 500
+        }, options);
+
+        this.filter('textarea').each(function(){
+            var textarea = $(this).css({resize:'none','overflow-y':'hidden'}),
+            origHeight = textarea.height(),
+            clone = (function(){
+                var props = ['height','width','lineHeight','textDecoration','letterSpacing'],
+                    propOb = {};
+
+                $.each(props, function(i, prop){
+                    propOb[prop] = textarea.css(prop);
+                });
+
+                return textarea.clone().removeAttr('id').removeAttr('name').css({
+                    position: 'absolute',
+                    top: 0,
+                    left: -9999
+                }).css(propOb).attr('tabIndex','-1').insertBefore(textarea);
+            })(),
+            lastScrollTop = null,
+            updateSize = function() {
+
+                clone.height(0).val($(this).val()).scrollTop(10000);
+                var scrollTop = Math.max(clone.scrollTop(), origHeight) + settings.extraSpace,
+                    toChange = $(this).add(clone);
+
+                if (lastScrollTop === scrollTop) { return; }
+                lastScrollTop = scrollTop;
+
+                if ( scrollTop >= settings.limit ) {
+                    if ( settings.limit != 0) {
+                        $(this).css('overflow-y','').css('height', settings.limit+'px');
+                        return;
+                    }
+                }
+                settings.onResize.call(this);
+                settings.animate && textarea.css('display') === 'block' ?
+                    toChange.stop().animate({height:scrollTop}, settings.animateDuration, settings.animateCallback)
+                    : toChange.height(scrollTop);
+            };
+            textarea
+                .unbind('.dynSiz')
+                .bind('keyup.dynSiz', updateSize)
+                .bind('keydown.dynSiz', updateSize)
+                .bind('change.dynSiz', updateSize)
+                .bind('blur.dynSiz', updateSize);
+        });
+        return this;
+    };
+
 }(jQuery));
 
+/* Clear the modal inner html when hidding */
 $('#modal').on('hidden.bs.modal', function () {
     $("#modal .modal-body").html('');
 });