From 92aac3abd6bc493a0c5f216e2e51359024b90af1 Mon Sep 17 00:00:00 2001 From: Brandon Aaron Date: Sat, 6 Oct 2007 17:04:20 +0000 Subject: [PATCH] Fixes memory leaks relating to events in IE with page unload and with jQuery methods remove, html and empty (#1610, #1618, #1697 and #1731). Also re-worked variable names to be more consistent with the core. --- src/core.js | 15 +++++++----- src/event.js | 69 +++++++++++++++++++++++++++++----------------------- 2 files changed, 47 insertions(+), 37 deletions(-) diff --git a/src/core.js b/src/core.js index 59cc1fc9..3cfabe3a 100644 --- 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 47758665..65700284 100644 --- 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(); + });