From ae5f3c74883ae2ea5c0d19151acc8fb33e5fd52c Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Sat, 26 Mar 2005 15:01:11 +0000
Subject: Added :highlight effect to do YFT automatically

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1004 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 .../action_view/helpers/javascripts/prototype.js   | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'actionpack/lib/action_view/helpers/javascripts')

diff --git a/actionpack/lib/action_view/helpers/javascripts/prototype.js b/actionpack/lib/action_view/helpers/javascripts/prototype.js
index 10e5f69cf6..fa1539fca4 100644
--- a/actionpack/lib/action_view/helpers/javascripts/prototype.js
+++ b/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;
+  }
+}
\ No newline at end of file
-- 
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