Added :highlight effect to do YFT automatically

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1004 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_view/helpers/javascript_helper.rb

@@ -159,7 +159,8 @@ def options_for_ajax(options)
 
         js_options['asynchronous'] = options[:type] != :synchronous
         js_options['method'] = options[:method] if options[:method]
-
+      	js_options['effect'] = ("\'"+options[:effect].to_s+"\'") if options[:effect]        
+
         if options[:form]
           js_options['parameters'] = 'Form.serialize(this)'
         elsif options[:with]

actionpack/lib/action_view/helpers/javascripts/prototype.js

@@ -203,6 +203,9 @@ Ajax.Updater.prototype = (new Ajax.Base()).extend({
 
   updateContent: function() {
     this.container.innerHTML = this.request.transport.responseText;
+    switch(this.options.effect) {
+      case 'highlight': new YellowFader(this.container); break;
+    }
     if (this.onComplete) this.onComplete(this.request);
   }
 });
@@ -346,3 +349,27 @@ Form.Observer.prototype = (new Abstract.TimedObserver()).extend({
   }
 });
 
+/*--------------------------------------------------------------------------*/
+
+var YellowFader = Class.create();
+YellowFader.prototype = {
+  initialize: function(element) {
+    if (typeof element == 'string') element = $(element);
+    if (!element) return;
+    this.element = element;
+    this.start  = 153;
+    this.finish = 255;
+    this.current = this.start;
+    this.fade();
+  },  
+  fade: function() {
+    if (this.isFinished()) return;
+    if (this.timer) clearTimeout(this.timer); // prevent flicker
+    highlight_yellow(this.element, this.current);
+    this.current += 17;
+    this.timer = setTimeout(this.fade.bind(this), 250);
+  },  
+  isFinished: function() {
+    return this.current > this.finish;
+  }
+}