src/event.js

   1 (function( jQuery ) {
   2
   3 var rnamespaces = /\.(.*)$/,
   4         rformElems = /^(?:textarea|input|select)$/i,
   5         rperiod = /\./g,
   6         rspace = / /g,
   7         rescape = /[^\w\s.|`]/g,
   8         fcleanup = function( nm ) {
   9                 return nm.replace(rescape, "\\$&");
  10         };
  11
  12 /*
  13  * A number of helper functions used for managing events.
  14  * Many of the ideas behind this code originated from
  15  * Dean Edwards' addEvent library.
  16  */
  17 jQuery.event = {
  18
  19         // Bind an event to an element
  20         // Original by Dean Edwards
  21         add: function( elem, types, handler, data ) {
  22                 if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
  23                         return;
  24                 }
  25
  26                 // For whatever reason, IE has trouble passing the window object
  27                 // around, causing it to be cloned in the process
  28                 if ( jQuery.isWindow( elem ) && ( elem !== window && !elem.frameElement ) ) {
  29                         elem = window;
  30                 }
  31
  32                 if ( handler === false ) {
  33                         handler = returnFalse;
  34                 }
  35
  36                 var handleObjIn, handleObj;
  37
  38                 if ( handler.handler ) {
  39                         handleObjIn = handler;
  40                         handler = handleObjIn.handler;
  41                 }
  42
  43                 // Make sure that the function being executed has a unique ID
  44                 if ( !handler.guid ) {
  45                         handler.guid = jQuery.guid++;
  46                 }
  47
  48                 // Init the element's event structure
  49                 var elemData = jQuery.data( elem );
  50
  51                 // If no elemData is found then we must be trying to bind to one of the
  52                 // banned noData elements
  53                 if ( !elemData ) {
  54                         return;
  55                 }
  56
  57                 var events = elemData.events = elemData.events || {},
  58                         eventHandle = elemData.handle;
  59
  60                 if ( !eventHandle ) {
  61                         elemData.handle = eventHandle = function() {
  62                                 // Handle the second event of a trigger and when
  63                                 // an event is called after a page has unloaded
  64                                 return typeof jQuery !== "undefined" && !jQuery.event.triggered ?
  65                                         jQuery.event.handle.apply( eventHandle.elem, arguments ) :
  66                                         undefined;
  67                         };
  68                 }
  69
  70                 // Add elem as a property of the handle function
  71                 // This is to prevent a memory leak with non-native events in IE.
  72                 eventHandle.elem = elem;
  73
  74                 // Handle multiple events separated by a space
  75                 // jQuery(...).bind("mouseover mouseout", fn);
  76                 types = types.split(" ");
  77
  78                 var type, i = 0, namespaces;
  79
  80                 while ( (type = types[ i++ ]) ) {
  81                         handleObj = handleObjIn ?
  82                                 jQuery.extend({}, handleObjIn) :
  83                                 { handler: handler, data: data };
  84
  85                         // Namespaced event handlers
  86                         if ( type.indexOf(".") > -1 ) {
  87                                 namespaces = type.split(".");
  88                                 type = namespaces.shift();
  89                                 handleObj.namespace = namespaces.slice(0).sort().join(".");
  90
  91                         } else {
  92                                 namespaces = [];
  93                                 handleObj.namespace = "";
  94                         }
  95
  96                         handleObj.type = type;
  97                         if ( !handleObj.guid ) {
  98                                 handleObj.guid = handler.guid;
  99                         }
 100
 101                         // Get the current list of functions bound to this event
 102                         var handlers = events[ type ],
 103                                 special = jQuery.event.special[ type ] || {};
 104
 105                         // Init the event handler queue
 106                         if ( !handlers ) {
 107                                 handlers = events[ type ] = [];
 108
 109                                 // Check for a special event handler
 110                                 // Only use addEventListener/attachEvent if the special
 111                                 // events handler returns false
 112                                 if ( !special.setup || special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
 113                                         // Bind the global event handler to the element
 114                                         if ( elem.addEventListener ) {
 115                                                 elem.addEventListener( type, eventHandle, false );
 116
 117                                         } else if ( elem.attachEvent ) {
 118                                                 elem.attachEvent( "on" + type, eventHandle );
 119                                         }
 120                                 }
 121                         }
 122
 123                         if ( special.add ) {
 124                                 special.add.call( elem, handleObj );
 125
 126                                 if ( !handleObj.handler.guid ) {
 127                                         handleObj.handler.guid = handler.guid;
 128                                 }
 129                         }
 130
 131                         // Add the function to the element's handler list
 132                         handlers.push( handleObj );
 133
 134                         // Keep track of which events have been used, for global triggering
 135                         jQuery.event.global[ type ] = true;
 136                 }
 137
 138                 // Nullify elem to prevent memory leaks in IE
 139                 elem = null;
 140         },
 141
 142         global: {},
 143
 144         // Detach an event or set of events from an element
 145         remove: function( elem, types, handler, pos ) {
 146                 // don't do events on text and comment nodes
 147                 if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
 148                         return;
 149                 }
 150
 151                 if ( handler === false ) {
 152                         handler = returnFalse;
 153                 }
 154
 155                 var ret, type, fn, j, i = 0, all, namespaces, namespace, special, eventType, handleObj, origType,
 156                         elemData = jQuery.data( elem ),
 157                         events = elemData && elemData.events;
 158
 159                 if ( !elemData || !events ) {
 160                         return;
 161                 }
 162
 163                 // types is actually an event object here
 164                 if ( types && types.type ) {
 165                         handler = types.handler;
 166                         types = types.type;
 167                 }
 168
 169                 // Unbind all events for the element
 170                 if ( !types || typeof types === "string" && types.charAt(0) === "." ) {
 171                         types = types || "";
 172
 173                         for ( type in events ) {
 174                                 jQuery.event.remove( elem, type + types );
 175                         }
 176
 177                         return;
 178                 }
 179
 180                 // Handle multiple events separated by a space
 181                 // jQuery(...).unbind("mouseover mouseout", fn);
 182                 types = types.split(" ");
 183
 184                 while ( (type = types[ i++ ]) ) {
 185                         origType = type;
 186                         handleObj = null;
 187                         all = type.indexOf(".") < 0;
 188                         namespaces = [];
 189
 190                         if ( !all ) {
 191                                 // Namespaced event handlers
 192                                 namespaces = type.split(".");
 193                                 type = namespaces.shift();
 194
 195                                 namespace = new RegExp("(^|\\.)" +
 196                                         jQuery.map( namespaces.slice(0).sort(), fcleanup ).join("\\.(?:.*\\.)?") + "(\\.|$)");
 197                         }
 198
 199                         eventType = events[ type ];
 200
 201                         if ( !eventType ) {
 202                                 continue;
 203                         }
 204
 205                         if ( !handler ) {
 206                                 for ( j = 0; j < eventType.length; j++ ) {
 207                                         handleObj = eventType[ j ];
 208
 209                                         if ( all || namespace.test( handleObj.namespace ) ) {
 210                                                 jQuery.event.remove( elem, origType, handleObj.handler, j );
 211                                                 eventType.splice( j--, 1 );
 212                                         }
 213                                 }
 214
 215                                 continue;
 216                         }
 217
 218                         special = jQuery.event.special[ type ] || {};
 219
 220                         for ( j = pos || 0; j < eventType.length; j++ ) {
 221                                 handleObj = eventType[ j ];
 222
 223                                 if ( handler.guid === handleObj.guid ) {
 224                                         // remove the given handler for the given type
 225                                         if ( all || namespace.test( handleObj.namespace ) ) {
 226                                                 if ( pos == null ) {
 227                                                         eventType.splice( j--, 1 );
 228                                                 }
 229
 230                                                 if ( special.remove ) {
 231                                                         special.remove.call( elem, handleObj );
 232                                                 }
 233                                         }
 234
 235                                         if ( pos != null ) {
 236                                                 break;
 237                                         }
 238                                 }
 239                         }
 240
 241                         // remove generic event handler if no more handlers exist
 242                         if ( eventType.length === 0 || pos != null && eventType.length === 1 ) {
 243                                 if ( !special.teardown || special.teardown.call( elem, namespaces ) === false ) {
 244                                         jQuery.removeEvent( elem, type, elemData.handle );
 245                                 }
 246
 247                                 ret = null;
 248                                 delete events[ type ];
 249                         }
 250                 }
 251
 252                 // Remove the expando if it's no longer used
 253                 if ( jQuery.isEmptyObject( events ) ) {
 254                         var handle = elemData.handle;
 255                         if ( handle ) {
 256                                 handle.elem = null;
 257                         }
 258
 259                         delete elemData.events;
 260                         delete elemData.handle;
 261
 262                         if ( jQuery.isEmptyObject( elemData ) ) {
 263                                 jQuery.removeData( elem );
 264                         }
 265                 }
 266         },
 267
 268         // bubbling is internal
 269         trigger: function( event, data, elem /*, bubbling */ ) {
 270                 // Event object or event type
 271                 var type = event.type || event,
 272                         bubbling = arguments[3];
 273
 274                 if ( !bubbling ) {
 275                         event = typeof event === "object" ?
 276                                 // jQuery.Event object
 277                                 event[ jQuery.expando ] ? event :
 278                                 // Object literal
 279                                 jQuery.extend( jQuery.Event(type), event ) :
 280                                 // Just the event type (string)
 281                                 jQuery.Event(type);
 282
 283                         if ( type.indexOf("!") >= 0 ) {
 284                                 event.type = type = type.slice(0, -1);
 285                                 event.exclusive = true;
 286                         }
 287
 288                         // Handle a global trigger
 289                         if ( !elem ) {
 290                                 // Don't bubble custom events when global (to avoid too much overhead)
 291                                 event.stopPropagation();
 292
 293                                 // Only trigger if we've ever bound an event for it
 294                                 if ( jQuery.event.global[ type ] ) {
 295                                         jQuery.each( jQuery.cache, function() {
 296                                                 if ( this.events && this.events[type] ) {
 297                                                         jQuery.event.trigger( event, data, this.handle.elem );
 298                                                 }
 299                                         });
 300                                 }
 301                         }
 302
 303                         // Handle triggering a single element
 304
 305                         // don't do events on text and comment nodes
 306                         if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
 307                                 return undefined;
 308                         }
 309
 310                         // Clean up in case it is reused
 311                         event.result = undefined;
 312                         event.target = elem;
 313
 314                         // Clone the incoming data, if any
 315                         data = jQuery.makeArray( data );
 316                         data.unshift( event );
 317                 }
 318
 319                 event.currentTarget = elem;
 320
 321                 // Trigger the event, it is assumed that "handle" is a function
 322                 var handle = jQuery.data( elem, "handle" );
 323                 if ( handle ) {
 324                         handle.apply( elem, data );
 325                 }
 326
 327                 var parent = elem.parentNode || elem.ownerDocument;
 328
 329                 // Trigger an inline bound script
 330                 try {
 331                         if ( !(elem && elem.nodeName && jQuery.noData[elem.nodeName.toLowerCase()]) ) {
 332                                 if ( elem[ "on" + type ] && elem[ "on" + type ].apply( elem, data ) === false ) {
 333                                         event.result = false;
 334                                         event.preventDefault();
 335                                 }
 336                         }
 337
 338                 // prevent IE from throwing an error for some elements with some event types, see #3533
 339                 } catch (inlineError) {}
 340
 341                 if ( !event.isPropagationStopped() && parent ) {
 342                         jQuery.event.trigger( event, data, parent, true );
 343
 344                 } else if ( !event.isDefaultPrevented() ) {
 345                         var target = event.target, old, targetType = type.replace(rnamespaces, ""),
 346                                 isClick = jQuery.nodeName(target, "a") && targetType === "click",
 347                                 special = jQuery.event.special[ targetType ] || {};
 348
 349                         if ( (!special._default || special._default.call( elem, event ) === false) &&
 350                                 !isClick && !(target && target.nodeName && jQuery.noData[target.nodeName.toLowerCase()]) ) {
 351
 352                                 try {
 353                                         if ( target[ targetType ] ) {
 354                                                 // Make sure that we don't accidentally re-trigger the onFOO events
 355                                                 old = target[ "on" + targetType ];
 356
 357                                                 if ( old ) {
 358                                                         target[ "on" + targetType ] = null;
 359                                                 }
 360
 361                                                 jQuery.event.triggered = true;
 362                                                 target[ targetType ]();
 363                                         }
 364
 365                                 // prevent IE from throwing an error for some elements with some event types, see #3533
 366                                 } catch (triggerError) {}
 367
 368                                 if ( old ) {
 369                                         target[ "on" + targetType ] = old;
 370                                 }
 371
 372                                 jQuery.event.triggered = false;
 373                         }
 374                 }
 375         },
 376
 377         handle: function( event ) {
 378                 var all, handlers, namespaces, namespace_sort = [], namespace_re, events, args = jQuery.makeArray( arguments );
 379
 380                 event = args[0] = jQuery.event.fix( event || window.event );
 381                 event.currentTarget = this;
 382
 383                 // Namespaced event handlers
 384                 all = event.type.indexOf(".") < 0 && !event.exclusive;
 385
 386                 if ( !all ) {
 387                         namespaces = event.type.split(".");
 388                         event.type = namespaces.shift();
 389                         namespace_sort = namespaces.slice(0).sort();
 390                         namespace_re = new RegExp("(^|\\.)" + namespace_sort.join("\\.(?:.*\\.)?") + "(\\.|$)");
 391                 }
 392
 393                 event.namespace = event.namespace || namespace_sort.join(".");
 394
 395                 events = jQuery.data(this, "events");
 396                 handlers = (events || {})[ event.type ];
 397
 398                 if ( events && handlers ) {
 399                         // Clone the handlers to prevent manipulation
 400                         handlers = handlers.slice(0);
 401
 402                         for ( var j = 0, l = handlers.length; j < l; j++ ) {
 403                                 var handleObj = handlers[ j ];
 404
 405                                 // Filter the functions by class
 406                                 if ( all || namespace_re.test( handleObj.namespace ) ) {
 407                                         // Pass in a reference to the handler function itself
 408                                         // So that we can later remove it
 409                                         event.handler = handleObj.handler;
 410                                         event.data = handleObj.data;
 411                                         event.handleObj = handleObj;
 412
 413                                         var ret = handleObj.handler.apply( this, args );
 414
 415                                         if ( ret !== undefined ) {
 416                                                 event.result = ret;
 417                                                 if ( ret === false ) {
 418                                                         event.preventDefault();
 419                                                         event.stopPropagation();
 420                                                 }
 421                                         }
 422
 423                                         if ( event.isImmediatePropagationStopped() ) {
 424                                                 break;
 425                                         }
 426                                 }
 427                         }
 428                 }
 429
 430                 return event.result;
 431         },
 432
 433         props: "altKey attrChange attrName bubbles button cancelable charCode clientX clientY ctrlKey currentTarget data detail eventPhase fromElement handler keyCode layerX layerY metaKey newValue offsetX offsetY pageX pageY prevValue relatedNode relatedTarget screenX screenY shiftKey srcElement target toElement view wheelDelta which".split(" "),
 434
 435         fix: function( event ) {
 436                 if ( event[ jQuery.expando ] ) {
 437                         return event;
 438                 }
 439
 440                 // store a copy of the original event object
 441                 // and "clone" to set read-only properties
 442                 var originalEvent = event;
 443                 event = jQuery.Event( originalEvent );
 444
 445                 for ( var i = this.props.length, prop; i; ) {
 446                         prop = this.props[ --i ];
 447                         event[ prop ] = originalEvent[ prop ];
 448                 }
 449
 450                 // Fix target property, if necessary
 451                 if ( !event.target ) {
 452                         event.target = event.srcElement || document; // Fixes #1925 where srcElement might not be defined either
 453                 }
 454
 455                 // check if target is a textnode (safari)
 456                 if ( event.target.nodeType === 3 ) {
 457                         event.target = event.target.parentNode;
 458                 }
 459
 460                 // Add relatedTarget, if necessary
 461                 if ( !event.relatedTarget && event.fromElement ) {
 462                         event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;
 463                 }
 464
 465                 // Calculate pageX/Y if missing and clientX/Y available
 466                 if ( event.pageX == null && event.clientX != null ) {
 467                         var doc = document.documentElement, body = document.body;
 468                         event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);
 469                         event.pageY = event.clientY + (doc && doc.scrollTop  || body && body.scrollTop  || 0) - (doc && doc.clientTop  || body && body.clientTop  || 0);
 470                 }
 471
 472                 // Add which for key events
 473                 if ( event.which == null && (event.charCode != null || event.charCode != null) ) {
 474                         event.which = event.charCode != null ? event.charCode : event.keyCode;
 475                 }
 476
 477                 // Add metaKey to non-Mac browsers (use ctrl for PC's and Meta for Macs)
 478                 if ( !event.metaKey && event.ctrlKey ) {
 479                         event.metaKey = event.ctrlKey;
 480                 }
 481
 482                 // Add which for click: 1 === left; 2 === middle; 3 === right
 483                 // Note: button is not normalized, so don't use it
 484                 if ( !event.which && event.button !== undefined ) {
 485                         event.which = (event.button & 1 ? 1 : ( event.button & 2 ? 3 : ( event.button & 4 ? 2 : 0 ) ));
 486                 }
 487
 488                 return event;
 489         },
 490
 491         // Deprecated, use jQuery.guid instead
 492         guid: 1E8,
 493
 494         // Deprecated, use jQuery.proxy instead
 495         proxy: jQuery.proxy,
 496
 497         special: {
 498                 ready: {
 499                         // Make sure the ready event is setup
 500                         setup: jQuery.bindReady,
 501                         teardown: jQuery.noop
 502                 },
 503
 504                 live: {
 505                         add: function( handleObj ) {
 506                                 jQuery.event.add( this,
 507                                         liveConvert( handleObj.origType, handleObj.selector ),
 508                                         jQuery.extend({}, handleObj, {handler: liveHandler, guid: handleObj.handler.guid}) );
 509                         },
 510
 511                         remove: function( handleObj ) {
 512                                 jQuery.event.remove( this, liveConvert( handleObj.origType, handleObj.selector ), handleObj );
 513                         }
 514                 },
 515
 516                 beforeunload: {
 517                         setup: function( data, namespaces, eventHandle ) {
 518                                 // We only want to do this special case on windows
 519                                 if ( jQuery.isWindow( this ) ) {
 520                                         this.onbeforeunload = eventHandle;
 521                                 }
 522                         },
 523
 524                         teardown: function( namespaces, eventHandle ) {
 525                                 if ( this.onbeforeunload === eventHandle ) {
 526                                         this.onbeforeunload = null;
 527                                 }
 528                         }
 529                 }
 530         }
 531 };
 532
 533 jQuery.removeEvent = document.removeEventListener ?
 534         function( elem, type, handle ) {
 535                 if ( elem.removeEventListener ) {
 536                         elem.removeEventListener( type, handle, false );
 537                 }
 538         } :
 539         function( elem, type, handle ) {
 540                 if ( elem.detachEvent ) {
 541                         elem.detachEvent( "on" + type, handle );
 542                 }
 543         };
 544
 545 jQuery.Event = function( src ) {
 546         // Allow instantiation without the 'new' keyword
 547         if ( !this.preventDefault ) {
 548                 return new jQuery.Event( src );
 549         }
 550
 551         // Event object
 552         if ( src && src.type ) {
 553                 this.originalEvent = src;
 554                 this.type = src.type;
 555         // Event type
 556         } else {
 557                 this.type = src;
 558         }
 559
 560         // timeStamp is buggy for some events on Firefox(#3843)
 561         // So we won't rely on the native value
 562         this.timeStamp = jQuery.now();
 563
 564         // Mark it as fixed
 565         this[ jQuery.expando ] = true;
 566 };
 567
 568 function returnFalse() {
 569         return false;
 570 }
 571 function returnTrue() {
 572         return true;
 573 }
 574
 575 // jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
 576 // http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
 577 jQuery.Event.prototype = {
 578         preventDefault: function() {
 579                 this.isDefaultPrevented = returnTrue;
 580
 581                 var e = this.originalEvent;
 582                 if ( !e ) {
 583                         return;
 584                 }
 585
 586                 // if preventDefault exists run it on the original event
 587                 if ( e.preventDefault ) {
 588                         e.preventDefault();
 589
 590                 // otherwise set the returnValue property of the original event to false (IE)
 591                 } else {
 592                         e.returnValue = false;
 593                 }
 594         },
 595         stopPropagation: function() {
 596                 this.isPropagationStopped = returnTrue;
 597
 598                 var e = this.originalEvent;
 599                 if ( !e ) {
 600                         return;
 601                 }
 602                 // if stopPropagation exists run it on the original event
 603                 if ( e.stopPropagation ) {
 604                         e.stopPropagation();
 605                 }
 606                 // otherwise set the cancelBubble property of the original event to true (IE)
 607                 e.cancelBubble = true;
 608         },
 609         stopImmediatePropagation: function() {
 610                 this.isImmediatePropagationStopped = returnTrue;
 611                 this.stopPropagation();
 612         },
 613         isDefaultPrevented: returnFalse,
 614         isPropagationStopped: returnFalse,
 615         isImmediatePropagationStopped: returnFalse
 616 };
 617
 618 // Checks if an event happened on an element within another element
 619 // Used in jQuery.event.special.mouseenter and mouseleave handlers
 620 var withinElement = function( event ) {
 621         // Check if mouse(over|out) are still within the same parent element
 622         var parent = event.relatedTarget;
 623
 624         // Firefox sometimes assigns relatedTarget a XUL element
 625         // which we cannot access the parentNode property of
 626         try {
 627                 // Traverse up the tree
 628                 while ( parent && parent !== this ) {
 629                         parent = parent.parentNode;
 630                 }
 631
 632                 if ( parent !== this ) {
 633                         // set the correct event type
 634                         event.type = event.data;
 635
 636                         // handle event if we actually just moused on to a non sub-element
 637                         jQuery.event.handle.apply( this, arguments );
 638                 }
 639
 640         // assuming we've left the element since we most likely mousedover a xul element
 641         } catch(e) { }
 642 },
 643
 644 // In case of event delegation, we only need to rename the event.type,
 645 // liveHandler will take care of the rest.
 646 delegate = function( event ) {
 647         event.type = event.data;
 648         jQuery.event.handle.apply( this, arguments );
 649 };
 650
 651 // Create mouseenter and mouseleave events
 652 jQuery.each({
 653         mouseenter: "mouseover",
 654         mouseleave: "mouseout"
 655 }, function( orig, fix ) {
 656         jQuery.event.special[ orig ] = {
 657                 setup: function( data ) {
 658                         jQuery.event.add( this, fix, data && data.selector ? delegate : withinElement, orig );
 659                 },
 660                 teardown: function( data ) {
 661                         jQuery.event.remove( this, fix, data && data.selector ? delegate : withinElement );
 662                 }
 663         };
 664 });
 665
 666 // submit delegation
 667 if ( !jQuery.support.submitBubbles ) {
 668
 669         jQuery.event.special.submit = {
 670                 setup: function( data, namespaces ) {
 671                         if ( this.nodeName.toLowerCase() !== "form" ) {
 672                                 jQuery.event.add(this, "click.specialSubmit", function( e ) {
 673                                         var elem = e.target, type = elem.type;
 674
 675                                         if ( (type === "submit" || type === "image") && jQuery( elem ).closest("form").length ) {
 676                                                 return trigger( "submit", this, arguments );
 677                                         }
 678                                 });
 679
 680                                 jQuery.event.add(this, "keypress.specialSubmit", function( e ) {
 681                                         var elem = e.target, type = elem.type;
 682
 683                                         if ( (type === "text" || type === "password") && jQuery( elem ).closest("form").length && e.keyCode === 13 ) {
 684                                                 return trigger( "submit", this, arguments );
 685                                         }
 686                                 });
 687
 688                         } else {
 689                                 return false;
 690                         }
 691                 },
 692
 693                 teardown: function( namespaces ) {
 694                         jQuery.event.remove( this, ".specialSubmit" );
 695                 }
 696         };
 697
 698 }
 699
 700 // change delegation, happens here so we have bind.
 701 if ( !jQuery.support.changeBubbles ) {
 702
 703         var changeFilters,
 704
 705         getVal = function( elem ) {
 706                 var type = elem.type, val = elem.value;
 707
 708                 if ( type === "radio" || type === "checkbox" ) {
 709                         val = elem.checked;
 710
 711                 } else if ( type === "select-multiple" ) {
 712                         val = elem.selectedIndex > -1 ?
 713                                 jQuery.map( elem.options, function( elem ) {
 714                                         return elem.selected;
 715                                 }).join("-") :
 716                                 "";
 717
 718                 } else if ( elem.nodeName.toLowerCase() === "select" ) {
 719                         val = elem.selectedIndex;
 720                 }
 721
 722                 return val;
 723         },
 724
 725         testChange = function testChange( e ) {
 726                 var elem = e.target, data, val;
 727
 728                 if ( !rformElems.test( elem.nodeName ) || elem.readOnly ) {
 729                         return;
 730                 }
 731
 732                 data = jQuery.data( elem, "_change_data" );
 733                 val = getVal(elem);
 734
 735                 // the current data will be also retrieved by beforeactivate
 736                 if ( e.type !== "focusout" || elem.type !== "radio" ) {
 737                         jQuery.data( elem, "_change_data", val );
 738                 }
 739
 740                 if ( data === undefined || val === data ) {
 741                         return;
 742                 }
 743
 744                 if ( data != null || val ) {
 745                         e.type = "change";
 746                         return jQuery.event.trigger( e, arguments[1], elem );
 747                 }
 748         };
 749
 750         jQuery.event.special.change = {
 751                 filters: {
 752                         focusout: testChange,
 753
 754                         click: function( e ) {
 755                                 var elem = e.target, type = elem.type;
 756
 757                                 if ( type === "radio" || type === "checkbox" || elem.nodeName.toLowerCase() === "select" ) {
 758                                         return testChange.call( this, e );
 759                                 }
 760                         },
 761
 762                         // Change has to be called before submit
 763                         // Keydown will be called before keypress, which is used in submit-event delegation
 764                         keydown: function( e ) {
 765                                 var elem = e.target, type = elem.type;
 766
 767                                 if ( (e.keyCode === 13 && elem.nodeName.toLowerCase() !== "textarea") ||
 768                                         (e.keyCode === 32 && (type === "checkbox" || type === "radio")) ||
 769                                         type === "select-multiple" ) {
 770                                         return testChange.call( this, e );
 771                                 }
 772                         },
 773
 774                         // Beforeactivate happens also before the previous element is blurred
 775                         // with this event you can't trigger a change event, but you can store
 776                         // information/focus[in] is not needed anymore
 777                         beforeactivate: function( e ) {
 778                                 var elem = e.target;
 779                                 jQuery.data( elem, "_change_data", getVal(elem) );
 780                         }
 781                 },
 782
 783                 setup: function( data, namespaces ) {
 784                         if ( this.type === "file" ) {
 785                                 return false;
 786                         }
 787
 788                         for ( var type in changeFilters ) {
 789                                 jQuery.event.add( this, type + ".specialChange", changeFilters[type] );
 790                         }
 791
 792                         return rformElems.test( this.nodeName );
 793                 },
 794
 795                 teardown: function( namespaces ) {
 796                         jQuery.event.remove( this, ".specialChange" );
 797
 798                         return rformElems.test( this.nodeName );
 799                 }
 800         };
 801
 802         changeFilters = jQuery.event.special.change.filters;
 803 }
 804
 805 function trigger( type, elem, args ) {
 806         args[0].type = type;
 807         return jQuery.event.handle.apply( elem, args );
 808 }
 809
 810 // Create "bubbling" focus and blur events
 811 if ( document.addEventListener ) {
 812         jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {
 813                 jQuery.event.special[ fix ] = {
 814                         setup: function() {
 815                                 this.addEventListener( orig, handler, true );
 816                         },
 817                         teardown: function() {
 818                                 this.removeEventListener( orig, handler, true );
 819                         }
 820                 };
 821
 822                 function handler( e ) {
 823                         e = jQuery.event.fix( e );
 824                         e.type = fix;
 825                         return jQuery.event.handle.call( this, e );
 826                 }
 827         });
 828 }
 829
 830 jQuery.each(["bind", "one"], function( i, name ) {
 831         jQuery.fn[ name ] = function( type, data, fn ) {
 832                 // Handle object literals
 833                 if ( typeof type === "object" ) {
 834                         for ( var key in type ) {
 835                                 this[ name ](key, data, type[key], fn);
 836                         }
 837                         return this;
 838                 }
 839
 840                 if ( jQuery.isFunction( data ) || data === false ) {
 841                         fn = data;
 842                         data = undefined;
 843                 }
 844
 845                 var handler = name === "one" ? jQuery.proxy( fn, function( event ) {
 846                         jQuery( this ).unbind( event, handler );
 847                         return fn.apply( this, arguments );
 848                 }) : fn;
 849
 850                 if ( type === "unload" && name !== "one" ) {
 851                         this.one( type, data, fn );
 852
 853                 } else {
 854                         for ( var i = 0, l = this.length; i < l; i++ ) {
 855                                 jQuery.event.add( this[i], type, handler, data );
 856                         }
 857                 }
 858
 859                 return this;
 860         };
 861 });
 862
 863 jQuery.fn.extend({
 864         unbind: function( type, fn ) {
 865                 // Handle object literals
 866                 if ( typeof type === "object" && !type.preventDefault ) {
 867                         for ( var key in type ) {
 868                                 this.unbind(key, type[key]);
 869                         }
 870
 871                 } else {
 872                         for ( var i = 0, l = this.length; i < l; i++ ) {
 873                                 jQuery.event.remove( this[i], type, fn );
 874                         }
 875                 }
 876
 877                 return this;
 878         },
 879
 880         delegate: function( selector, types, data, fn ) {
 881                 return this.live( types, data, fn, selector );
 882         },
 883
 884         undelegate: function( selector, types, fn ) {
 885                 if ( arguments.length === 0 ) {
 886                                 return this.unbind( "live" );
 887
 888                 } else {
 889                         return this.die( types, null, fn, selector );
 890                 }
 891         },
 892
 893         trigger: function( type, data ) {
 894                 return this.each(function() {
 895                         jQuery.event.trigger( type, data, this );
 896                 });
 897         },
 898
 899         triggerHandler: function( type, data ) {
 900                 if ( this[0] ) {
 901                         var event = jQuery.Event( type );
 902                         event.preventDefault();
 903                         event.stopPropagation();
 904                         jQuery.event.trigger( event, data, this[0] );
 905                         return event.result;
 906                 }
 907         },
 908
 909         toggle: function( fn ) {
 910                 // Save reference to arguments for access in closure
 911                 var args = arguments, i = 1;
 912
 913                 // link all the functions, so any of them can unbind this click handler
 914                 while ( i < args.length ) {
 915                         jQuery.proxy( fn, args[ i++ ] );
 916                 }
 917
 918                 return this.click( jQuery.proxy( fn, function( event ) {
 919                         // Figure out which function to execute
 920                         var lastToggle = ( jQuery.data( this, "lastToggle" + fn.guid ) || 0 ) % i;
 921                         jQuery.data( this, "lastToggle" + fn.guid, lastToggle + 1 );
 922
 923                         // Make sure that clicks stop
 924                         event.preventDefault();
 925
 926                         // and execute the function
 927                         return args[ lastToggle ].apply( this, arguments ) || false;
 928                 }));
 929         },
 930
 931         hover: function( fnOver, fnOut ) {
 932                 return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
 933         }
 934 });
 935
 936 var liveMap = {
 937         focus: "focusin",
 938         blur: "focusout",
 939         mouseenter: "mouseover",
 940         mouseleave: "mouseout"
 941 };
 942
 943 jQuery.each(["live", "die"], function( i, name ) {
 944         jQuery.fn[ name ] = function( types, data, fn, origSelector /* Internal Use Only */ ) {
 945                 var type, i = 0, match, namespaces, preType,
 946                         selector = origSelector || this.selector,
 947                         context = origSelector ? this : jQuery( this.context );
 948
 949                 if ( typeof types === "object" && !types.preventDefault ) {
 950                         for ( var key in types ) {
 951                                 context[ name ]( key, data, types[key], selector );
 952                         }
 953
 954                         return this;
 955                 }
 956
 957                 if ( jQuery.isFunction( data ) ) {
 958                         fn = data;
 959                         data = undefined;
 960                 }
 961
 962                 types = (types || "").split(" ");
 963
 964                 while ( (type = types[ i++ ]) != null ) {
 965                         match = rnamespaces.exec( type );
 966                         namespaces = "";
 967
 968                         if ( match )  {
 969                                 namespaces = match[0];
 970                                 type = type.replace( rnamespaces, "" );
 971                         }
 972
 973                         if ( type === "hover" ) {
 974                                 types.push( "mouseenter" + namespaces, "mouseleave" + namespaces );
 975                                 continue;
 976                         }
 977
 978                         preType = type;
 979
 980                         if ( type === "focus" || type === "blur" ) {
 981                                 types.push( liveMap[ type ] + namespaces );
 982                                 type = type + namespaces;
 983
 984                         } else {
 985                                 type = (liveMap[ type ] || type) + namespaces;
 986                         }
 987
 988                         if ( name === "live" ) {
 989                                 // bind live handler
 990                                 for ( var j = 0, l = context.length; j < l; j++ ) {
 991                                         jQuery.event.add( context[j], "live." + liveConvert( type, selector ),
 992                                                 { data: data, selector: selector, handler: fn, origType: type, origHandler: fn, preType: preType } );
 993                                 }
 994
 995                         } else {
 996                                 // unbind live handler
 997                                 context.unbind( "live." + liveConvert( type, selector ), fn );
 998                         }
 999                 }
1000
1001                 return this;
1002         };
1003 });
1004
1005 function liveHandler( event ) {
1006         var stop, maxLevel, elems = [], selectors = [],
1007                 related, match, handleObj, elem, j, i, l, data, close, namespace, ret,
1008                 events = jQuery.data( this, "events" );
1009
1010         // Make sure we avoid non-left-click bubbling in Firefox (#3861)
1011         if ( event.liveFired === this || !events || !events.live || event.button && event.type === "click" ) {
1012                 return;
1013         }
1014
1015         if ( event.namespace ) {
1016                 namespace = new RegExp("(^|\\.)" + event.namespace.split(".").join("\\.(?:.*\\.)?") + "(\\.|$)");
1017         }
1018
1019         event.liveFired = this;
1020
1021         var live = events.live.slice(0);
1022
1023         for ( j = 0; j < live.length; j++ ) {
1024                 handleObj = live[j];
1025
1026                 if ( handleObj.origType.replace( rnamespaces, "" ) === event.type ) {
1027                         selectors.push( handleObj.selector );
1028
1029                 } else {
1030                         live.splice( j--, 1 );
1031                 }
1032         }
1033
1034         match = jQuery( event.target ).closest( selectors, event.currentTarget );
1035
1036         for ( i = 0, l = match.length; i < l; i++ ) {
1037                 close = match[i];
1038
1039                 for ( j = 0; j < live.length; j++ ) {
1040                         handleObj = live[j];
1041
1042                         if ( close.selector === handleObj.selector && (!namespace || namespace.test( handleObj.namespace )) ) {
1043                                 elem = close.elem;
1044                                 related = null;
1045
1046                                 // Those two events require additional checking
1047                                 if ( handleObj.preType === "mouseenter" || handleObj.preType === "mouseleave" ) {
1048                                         event.type = handleObj.preType;
1049                                         related = jQuery( event.relatedTarget ).closest( handleObj.selector )[0];
1050                                 }
1051
1052                                 if ( !related || related !== elem ) {
1053                                         elems.push({ elem: elem, handleObj: handleObj, level: close.level });
1054                                 }
1055                         }
1056                 }
1057         }
1058
1059         for ( i = 0, l = elems.length; i < l; i++ ) {
1060                 match = elems[i];
1061
1062                 if ( maxLevel && match.level > maxLevel ) {
1063                         break;
1064                 }
1065
1066                 event.currentTarget = match.elem;
1067                 event.data = match.handleObj.data;
1068                 event.handleObj = match.handleObj;
1069
1070                 ret = match.handleObj.origHandler.apply( match.elem, arguments );
1071
1072                 if ( ret === false || event.isPropagationStopped() ) {
1073                         maxLevel = match.level;
1074
1075                         if ( ret === false ) {
1076                                 stop = false;
1077                         }
1078                 }
1079         }
1080
1081         return stop;
1082 }
1083
1084 function liveConvert( type, selector ) {
1085         return (type && type !== "*" ? type + "." : "") + selector.replace(rperiod, "`").replace(rspace, "&");
1086 }
1087
1088 jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
1089         "mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
1090         "change select submit keydown keypress keyup error").split(" "), function( i, name ) {
1091
1092         // Handle event binding
1093         jQuery.fn[ name ] = function( data, fn ) {
1094                 if ( fn == null ) {
1095                         fn = data;
1096                         data = null;
1097                 }
1098
1099                 return arguments.length > 0 ?
1100                         this.bind( name, data, fn ) :
1101                         this.trigger( name );
1102         };
1103
1104         if ( jQuery.attrFn ) {
1105                 jQuery.attrFn[ name ] = true;
1106         }
1107 });
1108
1109 // Prevent memory leaks in IE
1110 // Window isn't included so as not to unbind existing unload events
1111 // More info:
1112 //  - http://isaacschlueter.com/2006/10/msie-memory-leaks/
1113 if ( window.attachEvent && !window.addEventListener ) {
1114         window.attachEvent("onunload", function() {
1115                 for ( var id in jQuery.cache ) {
1116                         if ( jQuery.cache[ id ].handle ) {
1117                                 // Try/Catch is to handle iframes being unloaded, see #4280
1118                                 try {
1119                                         jQuery.event.remove( jQuery.cache[ id ].handle.elem );
1120                                 } catch(e) {}
1121                         }
1122                 }
1123         });
1124 }
1125
1126 })( jQuery );