From 8733352c201df6291b00f6b71a648550e6cbe5b6 Mon Sep 17 00:00:00 2001
From: steelsojka <steelsojka@gmail.com>
Date: Fri, 30 Aug 2013 14:15:47 -0500
Subject: [PATCH] feat(jqLite): add method offset as a getter to jqLite

Add the method offset to jqlite to retrieve the elements top and left
position. Using the method as a setter is not supported.
---
 src/jqLite.js      | 22 ++++++++++++++++++++++
 test/jqLiteSpec.js | 14 +++++++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/src/jqLite.js b/src/jqLite.js
index 4a52cba018f8..6105d19eddf1 100644
--- a/src/jqLite.js
+++ b/src/jqLite.js
@@ -46,6 +46,7 @@
  * - [next()](http://api.jquery.com/next/) - Does not support selectors
  * - [on()](http://api.jquery.com/on/) - Does not support namespaces, selectors or eventData
  * - [off()](http://api.jquery.com/off/) - Does not support namespaces or selectors
+ * - [offset()](http://api.jquery.com/offset/) - Does not support setter
  * - [parent()](http://api.jquery.com/parent/) - Does not support selectors
  * - [prepend()](http://api.jquery.com/prepend/)
  * - [prop()](http://api.jquery.com/prop/)
@@ -439,6 +440,27 @@ forEach({
       return  val;
     }
   },
+  
+  offset: function(element, name, value) {
+    var documentElem,
+      box = { top: 0, left: 0 },
+  		doc = element && element.ownerDocument;
+  
+  	if (!doc || isDefined(name)) { 
+  		return;
+  	}
+  
+  	documentElem = doc.documentElement;
+  
+  	if ( typeof element.getBoundingClientRect !== undefined ) {
+  		box = element.getBoundingClientRect();
+  	}
+  	
+  	return {
+  		top: box.top + (window.pageYOffset || documentElem.scrollTop) - (documentElem.clientTop || 0),
+  		left: box.left + (window.pageXOffset || documentElem.scrollLeft) - (documentElem.clientLeft || 0)
+  	};
+  },
 
   attr: function(element, name, value){
     var lowercasedName = lowercase(name);
diff --git a/test/jqLiteSpec.js b/test/jqLiteSpec.js
index 79c0d0c6a433..295a79593743 100644
--- a/test/jqLiteSpec.js
+++ b/test/jqLiteSpec.js
@@ -1288,7 +1288,19 @@ describe('jqLite', function() {
       expect(element.find('span').eq(20).length).toBe(0);
     });
   });
-
+  
+  describe('offset', function() {
+    it("should retrieve the offset of the element", function() {
+      var element = jqLite("<div style='position: absolute; top: 300px; left: 300px'></div>");
+      var doc = jqLite(document);
+      var body = doc.find("body");
+      body.append(element);
+      
+      var offset = element.offset();
+      expect(offset.top).toBe(300);
+      expect(offset.left).toBe(300);
+    });
+  });
 
   describe('triggerHandler', function() {
     it('should trigger all registered handlers for an event', function() {