Landing pull request 397. withinElement rewrite in event. Fixes #6234, #9357, #9447.

More Details:
 - https://github.com/jquery/jquery/pull/397
 - http://bugs.jquery.com/ticket/6234
 - http://bugs.jquery.com/ticket/9357
 - http://bugs.jquery.com/ticket/9447

1 files changed, 11 insertions, 18 deletions

diff --git a/src/event.js b/src/event.js
index 3f53ab5c2..131739b1a 100644
--- a/src/event.js
+++ b/src/event.js
@@ -650,34 +650,27 @@ jQuery.Event.prototype = {
 // Checks if an event happened on an element within another element
 // Used in jQuery.event.special.mouseenter and mouseleave handlers
 var withinElement = function( event ) {
+
 	// Check if mouse(over|out) are still within the same parent element
-	var parent = event.relatedTarget;
+	var related = event.relatedTarget,
+		inside = false,
+		eventType = event.type;
 
-	// set the correct event type
 	event.type = event.data;
 
-	// Firefox sometimes assigns relatedTarget a XUL element
-	// which we cannot access the parentNode property of
-	try {
+	if ( related !== this ) {
 
-		// Chrome does something similar, the parentNode property
-		// can be accessed but is null.
-		if ( parent && parent !== document && !parent.parentNode ) {
-			return;
+		if ( related ) {
+			inside = jQuery.contains( this, related );
 		}
 
-		// Traverse up the tree
-		while ( parent && parent !== this ) {
-			parent = parent.parentNode;
-		}
+		if ( !inside ) {
 
-		if ( parent !== this ) {
-			// handle event if we actually just moused on to a non sub-element
 			jQuery.event.handle.apply( this, arguments );
-		}
 
-	// assuming we've left the element since we most likely mousedover a xul element
-	} catch(e) { }
+			event.type = eventType;
+		}
+	}
 },
 
 // In case of event delegation, we only need to rename the event.type,