Fixes memory leaks relating to events in IE with page unload and with jQuery methods...

diff --git a/src/core.js b/src/core.js
index 59cc1fc..3cfabe3 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -1251,17 +1251,20 @@ jQuery.each({
 
        remove: function( selector ) {
                if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
-                       jQuery.removeData( this );
+                       // Prevent memory leaks
+                       jQuery( "*", this ).add(this).each(function(){
+                               jQuery.event.remove(this);
+                               jQuery.removeData(this);
+                       });
                        this.parentNode.removeChild( this );
                }
        },
 
        empty: function() {
-               // Clean up the cache
-               jQuery( "*", this ).each(function(){
-                       jQuery.removeData(this);
-               });
-
+               // Remove element nodes and prevent memory leaks
+               jQuery( ">*", this ).remove();
+               
+               // Remove any remaining nodes
                while ( this.firstChild )
                        this.removeChild( this.firstChild );
        }

diff --git a/src/event.js b/src/event.js
index 4775866..6570028 100644 (file)
--- a/src/event.js
+++ b/src/event.js
@@ -43,7 +43,7 @@ jQuery.event = {
                // Init the element's event structure
                var events = jQuery.data(element, "events") || jQuery.data(element, "events", {});
                
-               var handle = jQuery.data(element, "handle", function(){
+               var handle = jQuery.data(element, "handle") || jQuery.data(element, "handle", function(){
                        // returned undefined or false
                        var val;
 
@@ -149,10 +149,10 @@ jQuery.event = {
                } else {
                        var val, ret, fn = jQuery.isFunction( element[ type ] || null ),
                                // Check to see if we need to provide a fake event, or not
-                               evt = !data[0] || !data[0].preventDefault;
+                               event = !data[0] || !data[0].preventDefault;
                        
                        // Pass along a fake event
-                       if ( evt )
+                       if ( event )
                                data.unshift( this.fix({ type: type, target: element }) );
 
                        // Enforce the right trigger type
@@ -167,7 +167,7 @@ jQuery.event = {
                                val = false;
 
                        // Extra functions don't get the custom event object
-                       if ( evt )
+                       if ( event )
                                data.shift();
 
                        // Handle triggering of extra function
@@ -197,23 +197,24 @@ jQuery.event = {
                var parts = event.type.split(".");
                event.type = parts[0];
 
-               var c = jQuery.data(this, "events") && jQuery.data(this, "events")[event.type], args = Array.prototype.slice.call( arguments, 1 );
+               var handlers = jQuery.data(this, "events") && jQuery.data(this, "events")[event.type], args = Array.prototype.slice.call( arguments, 1 );
                args.unshift( event );
 
-               for ( var j in c ) {
+               for ( var j in handlers ) {
+                       var handler = handlers[j];
                        // Pass in a reference to the handler function itself
                        // So that we can later remove it
-                       args[0].handler = c[j];
-                       args[0].data = c[j].data;
+                       args[0].handler = handler;
+                       args[0].data = handler.data;
 
                        // Filter the functions by class
-                       if ( !parts[1] || c[j].type == parts[1] ) {
-                               var tmp = c[j].apply( this, args );
+                       if ( !parts[1] || handler.type == parts[1] ) {
+                               var ret = handler.apply( this, args );
 
                                if ( val !== false )
-                                       val = tmp;
+                                       val = ret;
 
-                               if ( tmp === false ) {
+                               if ( ret === false ) {
                                        event.preventDefault();
                                        event.stopPropagation();
                                }
@@ -265,9 +266,9 @@ jQuery.event = {
 
                // Calculate pageX/Y if missing and clientX/Y available
                if ( event.pageX == null && event.clientX != null ) {
-                       var e = document.documentElement, b = document.body;
-                       event.pageX = event.clientX + (e && e.scrollLeft || b && b.scrollLeft || 0);
-                       event.pageY = event.clientY + (e && e.scrollTop || b && b.scrollTop || 0);
+                       var doc = document.documentElement, body = document.body;
+                       event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0);
+                       event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0);
                }
                        
                // Add which for key events
@@ -322,54 +323,54 @@ jQuery.fn.extend({
 
        toggle: function() {
                // Save reference to arguments for access in closure
-               var a = arguments;
+               var args = arguments;
 
-               return this.click(function(e) {
+               return this.click(function(event) {
                        // Figure out which function to execute
                        this.lastToggle = 0 == this.lastToggle ? 1 : 0;
                        
                        // Make sure that clicks stop
-                       e.preventDefault();
+                       event.preventDefault();
                        
                        // and execute the function
-                       return a[this.lastToggle].apply( this, [e] ) || false;
+                       return args[this.lastToggle].apply( this, [event] ) || false;
                });
        },
 
-       hover: function(f,g) {
+       hover: function(fnOver, fnOut) {
                
                // A private function for handling mouse 'hovering'
-               function handleHover(e) {
+               function handleHover(event) {
                        // Check if mouse(over|out) are still within the same parent element
-                       var p = e.relatedTarget;
+                       var parent = event.relatedTarget;
        
                        // Traverse up the tree
-                       while ( p && p != this ) try { p = p.parentNode; } catch(e) { p = this; };
+                       while ( parent && parent != this ) try { parent = parent.parentNode; } catch(error) { parent = this; };
                        
                        // If we actually just moused on to a sub-element, ignore it
-                       if ( p == this ) return false;
+                       if ( parent == this ) return false;
                        
                        // Execute the right function
-                       return (e.type == "mouseover" ? f : g).apply(this, [e]);
+                       return (event.type == "mouseover" ? fnOver : fnOut).apply(this, [event]);
                }
                
                // Bind the function to the two event listeners
                return this.mouseover(handleHover).mouseout(handleHover);
        },
        
-       ready: function(f) {
+       ready: function(fn) {
                // Attach the listeners
                bindReady();
 
                // If the DOM is already ready
                if ( jQuery.isReady )
                        // Execute the function immediately
-                       f.apply( document, [jQuery] );
+                       fn.apply( document, [jQuery] );
                        
                // Otherwise, remember the function for later
                else
                        // Add the function to the wait list
-                       jQuery.readyList.push( function() { return f.apply(this, [jQuery]); } );
+                       jQuery.readyList.push( function() { return fn.apply(this, [jQuery]); } );
        
                return this;
        }
@@ -409,11 +410,11 @@ jQuery.extend({
 
 jQuery.each( ("blur,focus,load,resize,scroll,unload,click,dblclick," +
        "mousedown,mouseup,mousemove,mouseover,mouseout,change,select," + 
-       "submit,keydown,keypress,keyup,error").split(","), function(i,o){
+       "submit,keydown,keypress,keyup,error").split(","), function(i, name){
        
        // Handle event binding
-       jQuery.fn[o] = function(f){
-               return f ? this.bind(o, f) : this.trigger(o);
+       jQuery.fn[name] = function(fn){
+               return fn ? this.bind(name, fn) : this.trigger(name);
        };
 });
 
@@ -451,3 +452,9 @@ function bindReady(){
        // A fallback to window.onload, that will always work
        jQuery.event.add( window, "load", jQuery.ready );
 }
+
+// Prevent memory leaks in IE
+if ( jQuery.browser.msie )
+       jQuery(window).bind("unload", function() {
+               $("*").add([document, window]).unbind();
+       });