Effects.transfer: check the target is fixed or not, and consider scro…

…lling. Fixed #5547 - Transfer effect to fixed positioned element.

ui/jquery.effects.transfer.js

@@ -17,10 +17,14 @@ $.effects.effect.transfer = function( o ) {
 	return this.queue( function() {
 		var elem = $( this ),
 			target = $( o.to ),
+			targetFixed = target.css( "position" ) === "fixed",
+			body = $("body"),
+			fixTop = targetFixed ? body.scrollTop() : 0,
+			fixLeft = targetFixed ? body.scrollLeft() : 0,
 			endPosition = target.offset(),
 			animation = {
-				top: endPosition.top,
-				left: endPosition.left,
+				top: endPosition.top - fixTop ,
+				left: endPosition.left - fixLeft ,
 				height: target.innerHeight(),
 				width: target.innerWidth()
 			},
@@ -29,11 +33,11 @@ $.effects.effect.transfer = function( o ) {
 				.appendTo( document.body )
 				.addClass( o.className )
 				.css({
-					top: startPosition.top,
-					left: startPosition.left,
+					top: startPosition.top - fixTop ,
+					left: startPosition.left - fixLeft ,
 					height: elem.innerHeight(),
 					width: elem.innerWidth(),
-					position: 'absolute'
+					position: targetFixed ? "fixed" : "absolute"
 				})
 				.animate( animation, o.duration, o.easing, function() {
 					transfer.remove();