2 * A number of helper functions used for managing events.
3 * Many of the ideas behind this code originated from
4 * Dean Edwards' addEvent library.
8 // Bind an event to an element
9 // Original by Dean Edwards
10 add: function( elem, types, handler, data ) {
11 if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
15 // For whatever reason, IE has trouble passing the window object
16 // around, causing it to be cloned in the process
17 if ( elem.setInterval && ( elem !== window && !elem.frameElement ) ) {
21 // Make sure that the function being executed has a unique ID
22 if ( !handler.guid ) {
23 handler.guid = this.guid++;
26 // if data is passed, bind to handler
27 if ( data !== undefined ) {
28 // Create temporary function pointer to original handler
31 // Create unique handler function, wrapped around original handler
32 handler = this.proxy( fn );
34 // Store data in unique handler
38 // Init the element's event structure
39 var events = jQuery.data( elem, "events" ) || jQuery.data( elem, "events", {} ),
40 handle = jQuery.data( elem, "handle" ) || jQuery.data( elem, "handle", function() {
41 // Handle the second event of a trigger and when
42 // an event is called after a page has unloaded
43 return typeof jQuery !== "undefined" && !jQuery.event.triggered ?
44 jQuery.event.handle.apply( arguments.callee.elem, arguments ) :
47 // Add elem as a property of the handle function
48 // This is to prevent a memory leak with non-native
52 // Handle multiple events separated by a space
53 // jQuery(...).bind("mouseover mouseout", fn);
54 types = types.split( /\s+/ );
56 while ( (type = types[ i++ ]) ) {
57 // Namespaced event handlers
58 var namespaces = type.split(".");
59 type = namespaces.shift();
60 handler.type = namespaces.slice(0).sort().join(".");
62 // Get the current list of functions bound to this event
63 var handlers = events[ type ],
64 special = this.special[ type ] || {};
67 var modifiedHandler = special.add.call( elem, handler, data, namespaces );
68 if ( modifiedHandler && jQuery.isFunction( modifiedHandler ) ) {
69 modifiedHandler.guid = modifiedHandler.guid || handler.guid;
70 handler = modifiedHandler;
74 // Init the event handler queue
76 handlers = events[ type ] = {};
78 // Check for a special event handler
79 // Only use addEventListener/attachEvent if the special
80 // events handler returns false
81 if ( !special.setup || special.setup.call( elem, data, namespaces ) === false ) {
82 // Bind the global event handler to the element
83 if ( elem.addEventListener ) {
84 elem.addEventListener( type, handle, false );
85 } else if ( elem.attachEvent ) {
86 elem.attachEvent( "on" + type, handle );
91 // Add the function to the element's handler list
92 handlers[ handler.guid ] = handler;
94 // Keep track of which events have been used, for global triggering
95 this.global[ type ] = true;
98 // Nullify elem to prevent memory leaks in IE
105 // Detach an event or set of events from an element
106 remove: function( elem, types, handler ) {
107 // don't do events on text and comment nodes
108 if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
112 var events = jQuery.data( elem, "events" ), ret, type;
115 // Unbind all events for the element
116 if ( types === undefined || (typeof types === "string" && types.charAt(0) === ".") ) {
117 for ( type in events ) {
118 this.remove( elem, type + (types || "") );
121 // types is actually an event object here
123 handler = types.handler;
127 // Handle multiple events seperated by a space
128 // jQuery(...).unbind("mouseover mouseout", fn);
129 types = types.split(/\s+/);
131 while ( (type = types[ i++ ]) ) {
132 // Namespaced event handlers
133 var namespaces = type.split(".");
134 type = namespaces.shift();
135 var all = !namespaces.length,
136 namespace = new RegExp("(^|\\.)" + namespaces.slice(0).sort().join(".*\\.") + "(\\.|$)"),
137 special = this.special[ type ] || {};
139 if ( events[ type ] ) {
140 // remove the given handler for the given type
142 delete events[ type ][ handler.guid ];
144 // remove all handlers for the given type
146 for ( var handle in events[ type ] ) {
147 // Handle the removal of namespaced events
148 if ( all || namespace.test( events[ type ][ handle ].type ) ) {
149 delete events[ type ][ handle ];
154 if ( special.remove ) {
155 special.remove.call( elem, namespaces );
158 // remove generic event handler if no more handlers exist
159 for ( ret in events[ type ] ) {
163 if ( !special.teardown || special.teardown.call( elem, namespaces ) === false ) {
164 if ( elem.removeEventListener ) {
165 elem.removeEventListener( type, jQuery.data( elem, "handle" ), false );
166 } else if ( elem.detachEvent ) {
167 elem.detachEvent( "on" + type, jQuery.data( elem, "handle" ) );
171 delete events[ type ];
177 // Remove the expando if it's no longer used
178 for ( ret in events ) {
182 var handle = jQuery.data( elem, "handle" );
186 jQuery.removeData( elem, "events" );
187 jQuery.removeData( elem, "handle" );
192 // bubbling is internal
193 trigger: function( event, data, elem /*, bubbling */ ) {
194 // Event object or event type
195 var type = event.type || event,
196 bubbling = arguments[3];
199 event = typeof event === "object" ?
200 // jQuery.Event object
201 event[expando] ? event :
203 jQuery.extend( jQuery.Event(type), event ) :
204 // Just the event type (string)
207 if ( type.indexOf("!") >= 0 ) {
208 event.type = type = type.slice(0, -1);
209 event.exclusive = true;
212 // Handle a global trigger
214 // Don't bubble custom events when global (to avoid too much overhead)
215 event.stopPropagation();
216 // Only trigger if we've ever bound an event for it
217 if ( this.global[ type ] ) {
218 jQuery.each( jQuery.cache, function() {
219 if ( this.events && this.events[type] ) {
220 jQuery.event.trigger( event, data, this.handle.elem );
226 // Handle triggering a single element
228 // don't do events on text and comment nodes
229 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
233 // Clean up in case it is reused
234 event.result = undefined;
237 // Clone the incoming data, if any
238 data = jQuery.makeArray( data );
239 data.unshift( event );
242 event.currentTarget = elem;
244 // Trigger the event, it is assumed that "handle" is a function
245 var handle = jQuery.data( elem, "handle" );
247 handle.apply( elem, data );
250 var nativeFn, nativeHandler;
252 nativeFn = elem[ type ];
253 nativeHandler = elem[ "on" + type ];
254 // prevent IE from throwing an error for some elements with some event types, see #3533
256 // Handle triggering native .onfoo handlers (and on links since we don't call .click() for links)
257 if ( (!nativeFn || (jQuery.nodeName(elem, 'a') && type === "click")) && nativeHandler && nativeHandler.apply( elem, data ) === false ) {
258 event.result = false;
261 // Trigger the native events (except for clicks on links)
262 if ( !bubbling && nativeFn && !event.isDefaultPrevented() && !(jQuery.nodeName(elem, 'a') && type === "click") ) {
263 this.triggered = true;
266 // prevent IE from throwing an error for some hidden elements
270 this.triggered = false;
272 if ( !event.isPropagationStopped() ) {
273 var parent = elem.parentNode || elem.ownerDocument;
275 jQuery.event.trigger( event, data, parent, true );
280 handle: function( event ) {
281 // returned undefined or false
284 event = arguments[0] = jQuery.event.fix( event || window.event );
285 event.currentTarget = this;
287 // Namespaced event handlers
288 var namespaces = event.type.split(".");
289 event.type = namespaces.shift();
291 // Cache this now, all = true means, any handler
292 all = !namespaces.length && !event.exclusive;
294 var namespace = new RegExp("(^|\\.)" + namespaces.slice(0).sort().join(".*\\.") + "(\\.|$)");
296 handlers = ( jQuery.data(this, "events") || {} )[ event.type ];
298 for ( var j in handlers ) {
299 var handler = handlers[ j ];
301 // Filter the functions by class
302 if ( all || namespace.test(handler.type) ) {
303 // Pass in a reference to the handler function itself
304 // So that we can later remove it
305 event.handler = handler;
306 event.data = handler.data;
308 var ret = handler.apply( this, arguments );
310 if ( ret !== undefined ) {
312 if ( ret === false ) {
313 event.preventDefault();
314 event.stopPropagation();
318 if ( event.isImmediatePropagationStopped() ) {
326 props: "altKey attrChange attrName bubbles button cancelable charCode clientX clientY ctrlKey currentTarget data detail eventPhase fromElement handler keyCode layerX layerY metaKey newValue offsetX offsetY originalTarget pageX pageY prevValue relatedNode relatedTarget screenX screenY shiftKey srcElement target toElement view wheelDelta which".split(" "),
328 fix: function( event ) {
329 if ( event[ expando ] ) {
333 // store a copy of the original event object
334 // and "clone" to set read-only properties
335 var originalEvent = event;
336 event = jQuery.Event( originalEvent );
338 for ( var i = this.props.length, prop; i; ) {
339 prop = this.props[ --i ];
340 event[ prop ] = originalEvent[ prop ];
343 // Fix target property, if necessary
344 if ( !event.target ) {
345 event.target = event.srcElement || document; // Fixes #1925 where srcElement might not be defined either
348 // check if target is a textnode (safari)
349 if ( event.target.nodeType === 3 ) {
350 event.target = event.target.parentNode;
353 // Add relatedTarget, if necessary
354 if ( !event.relatedTarget && event.fromElement ) {
355 event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;
358 // Calculate pageX/Y if missing and clientX/Y available
359 if ( event.pageX == null && event.clientX != null ) {
360 var doc = document.documentElement, body = document.body;
361 event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);
362 event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);
365 // Add which for key events
366 if ( !event.which && ((event.charCode || event.charCode === 0) ? event.charCode : event.keyCode) ) {
367 event.which = event.charCode || event.keyCode;
370 // Add metaKey to non-Mac browsers (use ctrl for PC's and Meta for Macs)
371 if ( !event.metaKey && event.ctrlKey ) {
372 event.metaKey = event.ctrlKey;
375 // Add which for click: 1 == left; 2 == middle; 3 == right
376 // Note: button is not normalized, so don't use it
377 if ( !event.which && event.button !== undefined ) {
378 event.which = (event.button & 1 ? 1 : ( event.button & 2 ? 3 : ( event.button & 4 ? 2 : 0 ) ));
384 proxy: function( fn, proxy, thisObject ) {
385 if ( proxy !== undefined && !jQuery.isFunction( proxy ) ) {
389 // FIXME: Should proxy be redefined to be applied with thisObject if defined?
390 proxy = proxy || function() { return fn.apply( thisObject !== undefined ? thisObject : this, arguments ); };
391 // Set the guid of unique handler to the same of original handler, so it can be removed
392 proxy.guid = fn.guid = fn.guid || proxy.guid || this.guid++;
393 // So proxy can be declared as an argument
399 // Make sure the ready event is setup
401 teardown: function() {}
405 add: function( proxy, data, namespaces ) {
406 jQuery.extend( proxy, data || {} );
407 proxy.guid += data.selector + data.live;
408 jQuery.event.add( this, data.live, liveHandler );
411 remove: function( namespaces ) {
412 if ( namespaces.length ) {
413 var remove = 0, name = new RegExp("(^|\\.)" + namespaces[0] + "(\\.|$)");
415 jQuery.each( (jQuery.data(this, "events").live || {}), function() {
416 if ( name.test(this.type) ) {
422 jQuery.event.remove( this, namespaces[0], liveHandler );
430 jQuery.Event = function( src ){
431 // Allow instantiation without the 'new' keyword
432 if ( !this.preventDefault ) {
433 return new jQuery.Event( src );
437 if ( src && src.type ) {
438 this.originalEvent = src;
439 this.type = src.type;
445 // timeStamp is buggy for some events on Firefox(#3843)
446 // So we won't rely on the native value
447 this.timeStamp = now();
450 this[ expando ] = true;
453 function returnFalse() {
456 function returnTrue() {
460 // jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
461 // http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
462 jQuery.Event.prototype = {
463 preventDefault: function() {
464 this.isDefaultPrevented = returnTrue;
466 var e = this.originalEvent;
470 // if preventDefault exists run it on the original event
471 if ( e.preventDefault ) {
474 // otherwise set the returnValue property of the original event to false (IE)
475 e.returnValue = false;
477 stopPropagation: function() {
478 this.isPropagationStopped = returnTrue;
480 var e = this.originalEvent;
484 // if stopPropagation exists run it on the original event
485 if ( e.stopPropagation ) {
488 // otherwise set the cancelBubble property of the original event to true (IE)
489 e.cancelBubble = true;
491 stopImmediatePropagation: function(){
492 this.isImmediatePropagationStopped = returnTrue;
493 this.stopPropagation();
495 isDefaultPrevented: returnFalse,
496 isPropagationStopped: returnFalse,
497 isImmediatePropagationStopped: returnFalse
499 // Checks if an event happened on an element within another element
500 // Used in jQuery.event.special.mouseenter and mouseleave handlers
501 var withinElement = function( event ) {
502 // Check if mouse(over|out) are still within the same parent element
503 var parent = event.relatedTarget;
504 // Traverse up the tree
505 while ( parent && parent != this ) {
506 // Firefox sometimes assigns relatedTarget a XUL element
507 // which we cannot access the parentNode property of
508 try { parent = parent.parentNode; }
509 // assuming we've left the element since we most likely mousedover a xul element
513 if ( parent != this ) {
514 // set the correct event type
515 event.type = event.data;
516 // handle event if we actually just moused on to a non sub-element
517 jQuery.event.handle.apply( this, arguments );
521 // Create mouseenter and mouseleave events
523 mouseover: "mouseenter",
524 mouseout: "mouseleave"
525 }, function( orig, fix ) {
526 jQuery.event.special[ fix ] = {
528 jQuery.event.add( this, orig, withinElement, fix );
530 teardown: function(){
531 jQuery.event.remove( this, orig, withinElement );
536 // Create "bubbling" focus and blur events
540 }, function( orig, fix ){
541 var event = jQuery.event,
542 special = event.special,
543 handle = event.handle;
545 function ieHandler() {
546 arguments[0].type = orig;
547 return handle.apply(this, arguments);
552 if ( this.addEventListener )
553 this.addEventListener( orig, handle, true );
555 jQuery.event.add( this, fix, ieHandler );
557 teardown:function() {
558 if ( this.removeEventListener )
559 this.removeEventListener( orig, handle, true );
561 jQuery.event.remove( this, fix, ieHandler );
567 bind: function( type, data, fn, thisObject ) {
568 if ( jQuery.isFunction( data ) ) {
573 fn = thisObject === undefined ? fn : jQuery.event.proxy( fn, thisObject );
574 return type === "unload" ? this.one(type, data, fn, thisObject) : this.each(function() {
575 jQuery.event.add( this, type, fn, data );
579 one: function( type, data, fn, thisObject ) {
580 if ( jQuery.isFunction( data ) ) {
585 fn = thisObject === undefined ? fn : jQuery.event.proxy( fn, thisObject );
586 var one = jQuery.event.proxy( fn, function( event ) {
587 jQuery( this ).unbind( event, one );
588 return fn.apply( this, arguments );
590 return this.each(function() {
591 jQuery.event.add( this, type, one, data );
595 unbind: function( type, fn ) {
596 return this.each(function() {
597 jQuery.event.remove( this, type, fn );
601 trigger: function( type, data ) {
602 return this.each(function() {
603 jQuery.event.trigger( type, data, this );
607 triggerHandler: function( type, data ) {
609 var event = jQuery.Event( type );
610 event.preventDefault();
611 event.stopPropagation();
612 jQuery.event.trigger( event, data, this[0] );
617 toggle: function( fn ) {
618 // Save reference to arguments for access in closure
619 var args = arguments, i = 1;
621 // link all the functions, so any of them can unbind this click handler
622 while( i < args.length ) {
623 jQuery.event.proxy( fn, args[ i++ ] );
626 return this.click( jQuery.event.proxy( fn, function( event ) {
627 // Figure out which function to execute
628 this.lastToggle = ( this.lastToggle || 0 ) % i;
630 // Make sure that clicks stop
631 event.preventDefault();
633 // and execute the function
634 return args[ this.lastToggle++ ].apply( this, arguments ) || false;
638 hover: function( fnOver, fnOut ) {
639 return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
642 ready: function( fn ) {
643 // Attach the listeners
646 // If the DOM is already ready
647 if ( jQuery.isReady ) {
648 // Execute the function immediately
649 fn.call( document, jQuery );
651 // Otherwise, remember the function for later
653 // Add the function to the wait list
654 jQuery.readyList.push( fn );
660 live: function( type, data, fn, thisObject ) {
661 if ( jQuery.isFunction( data ) ) {
662 if ( fn !== undefined ) {
668 jQuery( this.context ).bind( liveConvert( type, this.selector ), {
669 data: data, selector: this.selector, live: type
674 die: function( type, fn ) {
675 jQuery( this.context ).unbind( liveConvert( type, this.selector ), fn ? { guid: fn.guid + this.selector + type } : null );
680 function liveHandler( event ) {
681 var stop = true, elems = [], args = arguments;
683 jQuery.each( jQuery.data( this, "events" ).live || [], function( i, fn ) {
684 if ( fn.live === event.type ) {
685 var elem = jQuery( event.target ).closest( fn.selector )[0];
687 elems.push({ elem: elem, fn: fn });
692 elems.sort(function( a, b ) {
693 return jQuery.data( a.elem, "closest" ) - jQuery.data( b.elem, "closest" );
696 jQuery.each(elems, function() {
697 event.currentTarget = this.elem;
698 event.data = this.fn.data;
699 if ( this.fn.apply( this.elem, args ) === false ) {
700 return (stop = false);
707 function liveConvert( type, selector ) {
708 return ["live", type, selector.replace(/\./g, "`").replace(/ /g, "|")].join(".");
714 // Handle when the DOM is ready
716 // Make sure that the DOM is not already loaded
717 if ( !jQuery.isReady ) {
718 // Remember that the DOM is ready
719 jQuery.isReady = true;
721 // If there are functions bound, to execute
722 if ( jQuery.readyList ) {
723 // Execute all of them
725 while ( (fn = jQuery.readyList[ i++ ]) ) {
726 fn.call( document, jQuery );
729 // Reset the list of functions
730 jQuery.readyList = null;
733 // Trigger any bound ready events
734 jQuery( document ).triggerHandler( "ready" );
739 var readyBound = false;
741 function bindReady() {
742 if ( readyBound ) return;
745 // Catch cases where $(document).ready() is called after the
746 // browser event has already occurred.
747 if ( document.readyState === "complete" ) {
748 return jQuery.ready();
751 // Mozilla, Opera and webkit nightlies currently support this event
752 if ( document.addEventListener ) {
753 // Use the handy event callback
754 document.addEventListener( "DOMContentLoaded", function() {
755 document.removeEventListener( "DOMContentLoaded", arguments.callee, false );
759 // If IE event model is used
760 } else if ( document.attachEvent ) {
761 // ensure firing before onload,
762 // maybe late but safe also for iframes
763 document.attachEvent("onreadystatechange", function() {
764 if ( document.readyState === "complete" ) {
765 document.detachEvent( "onreadystatechange", arguments.callee );
770 // If IE and not an iframe
771 // continually check to see if the document is ready
772 if ( document.documentElement.doScroll && window === window.top ) (function() {
773 if ( jQuery.isReady ) {
778 // If IE is used, use the trick by Diego Perini
779 // http://javascript.nwbox.com/IEContentLoaded/
780 document.documentElement.doScroll("left");
782 setTimeout( arguments.callee, 0 );
786 // and execute any waiting functions
791 // A fallback to window.onload, that will always work
792 jQuery.event.add( window, "load", jQuery.ready );
795 jQuery.each( ("blur,focus,load,resize,scroll,unload,click,dblclick," +
796 "mousedown,mouseup,mousemove,mouseover,mouseout,mouseenter,mouseleave," +
797 "change,select,submit,keydown,keypress,keyup,error").split(","), function( i, name ) {
799 // Handle event binding
800 jQuery.fn[ name ] = function( fn ) {
801 return fn ? this.bind( name, fn ) : this.trigger( name );
805 // Prevent memory leaks in IE
806 // Window isn't included so as not to unbind existing unload events
808 // - http://isaacschlueter.com/2006/10/msie-memory-leaks/
810 jQuery( window ).bind( 'unload', function() {
811 for ( var id in jQuery.cache ) {
813 if ( id != 1 && jQuery.cache[ id ].handle ) {
814 jQuery.event.remove( jQuery.cache[ id ].handle.elem );