Draggable: Handle scrolled windows. Fixes #6181 - Draggable: issue with containment on position:fixed elements.

Author: Jean-Francois Remy

ui/jquery.ui.draggable.js

@@ -333,10 +333,10 @@ $.widget("ui.draggable", $.ui.mouse, {
 		var o = this.options;
 		if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
 		if(o.containment == 'document' || o.containment == 'window') this.containment = [
-			0 - this.offset.relative.left - this.offset.parent.left,
-			0 - this.offset.relative.top - this.offset.parent.top,
-			$(o.containment == 'document' ? document : window).width() - this.helperProportions.width - this.margins.left,
-			($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top
+			(o.containment == 'document' ? 0 : $(window).scrollLeft()) - this.offset.relative.left - this.offset.parent.left,
+			(o.containment == 'document' ? 0 : $(window).scrollTop()) - this.offset.relative.top - this.offset.parent.top,
+			(o.containment == 'document' ? 0 : $(window).scrollLeft()) + $(o.containment == 'document' ? document : window).width() - this.helperProportions.width - this.margins.left,
+			(o.containment == 'document' ? 0 : $(window).scrollTop()) + ($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top
 		];
 
 		if(!(/^(document|window|parent)$/).test(o.containment) && o.containment.constructor != Array) {