wradmin_/wradmin/public/yui/tabview/tabview.js

   1 /*
   2 Copyright (c) 2009, Yahoo! Inc. All rights reserved.
   3 Code licensed under the BSD License:
   4 http://developer.yahoo.net/yui/license.txt
   5 version: 2.7.0
   6 */
   7 (function() {
   8
   9     /**
  10      * The tabview module provides a widget for managing content bound to tabs.
  11      * @module tabview
  12      * @requires yahoo, dom, event, element
  13      *
  14      */
  15
  16     var Y = YAHOO.util,
  17         Dom = Y.Dom,
  18         Event = Y.Event,
  19         document = window.document,
  20
  21         // STRING CONSTANTS
  22         ACTIVE = 'active',
  23         ACTIVE_INDEX = 'activeIndex',
  24         ACTIVE_TAB = 'activeTab',
  25         CONTENT_EL = 'contentEl',
  26         ELEMENT = 'element',
  27
  28     /**
  29      * A widget to control tabbed views.
  30      * @namespace YAHOO.widget
  31      * @class TabView
  32      * @extends YAHOO.util.Element
  33      * @constructor
  34      * @param {HTMLElement | String | Object} el(optional) The html
  35      * element that represents the TabView, or the attribute object to use.
  36      * An element will be created if none provided.
  37      * @param {Object} attr (optional) A key map of the tabView's
  38      * initial attributes.  Ignored if first arg is attributes object.
  39      */
  40     TabView = function(el, attr) {
  41         attr = attr || {};
  42         if (arguments.length == 1 && !YAHOO.lang.isString(el) && !el.nodeName) {
  43             attr = el; // treat first arg as attr object
  44             el = attr.element || null;
  45         }
  46
  47         if (!el && !attr.element) { // create if we dont have one
  48             el = this._createTabViewElement(attr);
  49         }
  50         TabView.superclass.constructor.call(this, el, attr);
  51     };
  52
  53     YAHOO.extend(TabView, Y.Element, {
  54         /**
  55          * The className to add when building from scratch.
  56          * @property CLASSNAME
  57          * @default "navset"
  58          */
  59         CLASSNAME: 'yui-navset',
  60
  61         /**
  62          * The className of the HTMLElement containing the TabView's tab elements
  63          * to look for when building from existing markup, or to add when building
  64          * from scratch.
  65          * All childNodes of the tab container are treated as Tabs when building
  66          * from existing markup.
  67          * @property TAB_PARENT_CLASSNAME
  68          * @default "nav"
  69          */
  70         TAB_PARENT_CLASSNAME: 'yui-nav',
  71
  72         /**
  73          * The className of the HTMLElement containing the TabView's label elements
  74          * to look for when building from existing markup, or to add when building
  75          * from scratch.
  76          * All childNodes of the content container are treated as content elements when
  77          * building from existing markup.
  78          * @property CONTENT_PARENT_CLASSNAME
  79          * @default "nav-content"
  80          */
  81         CONTENT_PARENT_CLASSNAME: 'yui-content',
  82
  83         _tabParent: null,
  84         _contentParent: null,
  85
  86         /**
  87          * Adds a Tab to the TabView instance.
  88          * If no index is specified, the tab is added to the end of the tab list.
  89          * @method addTab
  90          * @param {YAHOO.widget.Tab} tab A Tab instance to add.
  91          * @param {Integer} index The position to add the tab.
  92          * @return void
  93          */
  94         addTab: function(tab, index) {
  95             var tabs = this.get('tabs'),
  96                 before = this.getTab(index),
  97                 tabParent = this._tabParent,
  98                 contentParent = this._contentParent,
  99                 tabElement = tab.get(ELEMENT),
 100                 contentEl = tab.get(CONTENT_EL);
 101
 102             if (!tabs) { // not ready yet
 103                 this._queue[this._queue.length] = ['addTab', arguments];
 104                 return false;
 105             }
 106
 107             index = (index === undefined) ? tabs.length : index;
 108
 109             if ( before ) {
 110                 tabParent.insertBefore(tabElement, before.get(ELEMENT));
 111             } else {
 112                 tabParent.appendChild(tabElement);
 113             }
 114
 115             if ( contentEl && !Dom.isAncestor(contentParent, contentEl) ) {
 116                 contentParent.appendChild(contentEl);
 117             }
 118
 119             if ( !tab.get(ACTIVE) ) {
 120                 tab.set('contentVisible', false, true); /* hide if not active */
 121             } else {
 122                 this.set(ACTIVE_TAB, tab, true);
 123
 124             }
 125
 126             this._initTabEvents(tab);
 127             tabs.splice(index, 0, tab);
 128         },
 129
 130         _initTabEvents: function(tab) {
 131             tab.addListener( tab.get('activationEvent'), tab._onActivate, this, tab);
 132
 133             tab.addListener('activationEventChange', function(e) {
 134                 if (e.prevValue != e.newValue) {
 135                     tab.removeListener(e.prevValue, tab._onActivate);
 136                     tab.addListener(e.newValue, tab._onActivate, this, tab);
 137                 }
 138             });
 139         },
 140
 141         /**
 142          * Routes childNode events.
 143          * @method DOMEventHandler
 144          * @param {event} e The Dom event that is being handled.
 145          * @return void
 146          */
 147         DOMEventHandler: function(e) {
 148             var target = Event.getTarget(e),
 149                 tabParent = this._tabParent,
 150                 tabs = this.get('tabs'),
 151                 tab,
 152                 tabEl,
 153                 contentEl;
 154
 155
 156             if (Dom.isAncestor(tabParent, target) ) {
 157                 for (var i = 0, len = tabs.length; i < len; i++) {
 158                     tabEl = tabs[i].get(ELEMENT);
 159                     contentEl = tabs[i].get(CONTENT_EL);
 160
 161                     if ( target == tabEl || Dom.isAncestor(tabEl, target) ) {
 162                         tab = tabs[i];
 163                         break; // note break
 164                     }
 165                 }
 166
 167                 if (tab) {
 168                     tab.fireEvent(e.type, e);
 169                 }
 170             }
 171         },
 172
 173         /**
 174          * Returns the Tab instance at the specified index.
 175          * @method getTab
 176          * @param {Integer} index The position of the Tab.
 177          * @return YAHOO.widget.Tab
 178          */
 179         getTab: function(index) {
 180             return this.get('tabs')[index];
 181         },
 182
 183         /**
 184          * Returns the index of given tab.
 185          * @method getTabIndex
 186          * @param {YAHOO.widget.Tab} tab The tab whose index will be returned.
 187          * @return int
 188          */
 189         getTabIndex: function(tab) {
 190             var index = null,
 191                 tabs = this.get('tabs');
 192             for (var i = 0, len = tabs.length; i < len; ++i) {
 193                 if (tab == tabs[i]) {
 194                     index = i;
 195                     break;
 196                 }
 197             }
 198
 199             return index;
 200         },
 201
 202         /**
 203          * Removes the specified Tab from the TabView.
 204          * @method removeTab
 205          * @param {YAHOO.widget.Tab} item The Tab instance to be removed.
 206          * @return void
 207          */
 208         removeTab: function(tab) {
 209             var tabCount = this.get('tabs').length,
 210                 index = this.getTabIndex(tab);
 211
 212             if ( tab === this.get(ACTIVE_TAB) ) {
 213                 if (tabCount > 1) { // select another tab
 214                     if (index + 1 === tabCount) { // if last, activate previous
 215                         this.set(ACTIVE_INDEX, index - 1);
 216                     } else { // activate next tab
 217                         this.set(ACTIVE_INDEX, index + 1);
 218                     }
 219                 } else { // no more tabs
 220                     this.set(ACTIVE_TAB, null);
 221                 }
 222             }
 223
 224             this._tabParent.removeChild( tab.get(ELEMENT) );
 225             this._contentParent.removeChild( tab.get(CONTENT_EL) );
 226             this._configs.tabs.value.splice(index, 1);
 227
 228             tab.fireEvent('remove', { type: 'remove', tabview: this });
 229         },
 230
 231         /**
 232          * Provides a readable name for the TabView instance.
 233          * @method toString
 234          * @return String
 235          */
 236         toString: function() {
 237             var name = this.get('id') || this.get('tagName');
 238             return "TabView " + name;
 239         },
 240
 241         /**
 242          * The transiton to use when switching between tabs.
 243          * @method contentTransition
 244          */
 245         contentTransition: function(newTab, oldTab) {
 246             if (newTab) {
 247                 newTab.set('contentVisible', true);
 248             }
 249             if (oldTab) {
 250                 oldTab.set('contentVisible', false);
 251             }
 252         },
 253
 254         /**
 255          * setAttributeConfigs TabView specific properties.
 256          * @method initAttributes
 257          * @param {Object} attr Hash of initial attributes
 258          */
 259         initAttributes: function(attr) {
 260             TabView.superclass.initAttributes.call(this, attr);
 261
 262             if (!attr.orientation) {
 263                 attr.orientation = 'top';
 264             }
 265
 266             var el = this.get(ELEMENT);
 267
 268             if (!Dom.hasClass(el, this.CLASSNAME)) {
 269                 Dom.addClass(el, this.CLASSNAME);
 270             }
 271
 272             /**
 273              * The Tabs belonging to the TabView instance.
 274              * @attribute tabs
 275              * @type Array
 276              */
 277             this.setAttributeConfig('tabs', {
 278                 value: [],
 279                 readOnly: true
 280             });
 281
 282             /**
 283              * The container of the tabView's label elements.
 284              * @property _tabParent
 285              * @private
 286              * @type HTMLElement
 287              */
 288             this._tabParent =
 289                     this.getElementsByClassName(this.TAB_PARENT_CLASSNAME,
 290                             'ul' )[0] || this._createTabParent();
 291
 292             /**
 293              * The container of the tabView's content elements.
 294              * @property _contentParent
 295              * @type HTMLElement
 296              * @private
 297              */
 298             this._contentParent =
 299                     this.getElementsByClassName(this.CONTENT_PARENT_CLASSNAME,
 300                             'div')[0] ||  this._createContentParent();
 301
 302             /**
 303              * How the Tabs should be oriented relative to the TabView.
 304              * @attribute orientation
 305              * @type String
 306              * @default "top"
 307              */
 308             this.setAttributeConfig('orientation', {
 309                 value: attr.orientation,
 310                 method: function(value) {
 311                     var current = this.get('orientation');
 312                     this.addClass('yui-navset-' + value);
 313
 314                     if (current != value) {
 315                         this.removeClass('yui-navset-' + current);
 316                     }
 317
 318                     if (value === 'bottom') {
 319                         this.appendChild(this._tabParent);
 320                     }
 321                 }
 322             });
 323
 324             /**
 325              * The index of the tab currently active.
 326              * @attribute activeIndex
 327              * @type Int
 328              */
 329             this.setAttributeConfig(ACTIVE_INDEX, {
 330                 value: attr.activeIndex,
 331                 method: function(value) {
 332                 },
 333                 validator: function(value) {
 334                     var ret = true;
 335                     if (value && this.getTab(value).get('disabled')) { // cannot activate if disabled
 336                         ret = false;
 337                     }
 338                     return ret;
 339                 }
 340             });
 341
 342             /**
 343              * The tab currently active.
 344              * @attribute activeTab
 345              * @type YAHOO.widget.Tab
 346              */
 347             this.setAttributeConfig(ACTIVE_TAB, {
 348                 value: attr.activeTab,
 349                 method: function(tab) {
 350                     var activeTab = this.get(ACTIVE_TAB);
 351
 352                     if (tab) {
 353                         tab.set(ACTIVE, true);
 354                     }
 355
 356                     if (activeTab && activeTab !== tab) {
 357                         activeTab.set(ACTIVE, false);
 358                     }
 359
 360                     if (activeTab && tab !== activeTab) { // no transition if only 1
 361                         this.contentTransition(tab, activeTab);
 362                     } else if (tab) {
 363                         tab.set('contentVisible', true);
 364                     }
 365                 },
 366                 validator: function(value) {
 367                     var ret = true;
 368                     if (value && value.get('disabled')) { // cannot activate if disabled
 369                         ret = false;
 370                     }
 371                     return ret;
 372                 }
 373             });
 374
 375             this.on('activeTabChange', this._onActiveTabChange);
 376             this.on('activeIndexChange', this._onActiveIndexChange);
 377
 378             if ( this._tabParent ) {
 379                 this._initTabs();
 380             }
 381
 382             // Due to delegation we add all DOM_EVENTS to the TabView container
 383             // but IE will leak when unsupported events are added, so remove these
 384             this.DOM_EVENTS.submit = false;
 385             this.DOM_EVENTS.focus = false;
 386             this.DOM_EVENTS.blur = false;
 387
 388             for (var type in this.DOM_EVENTS) {
 389                 if ( YAHOO.lang.hasOwnProperty(this.DOM_EVENTS, type) ) {
 390                     this.addListener.call(this, type, this.DOMEventHandler);
 391                 }
 392             }
 393         },
 394
 395         /**
 396          * Removes selected state from the given tab if it is the activeTab
 397          * @method deselectTab
 398          * @param {Int} index The tab index to deselect
 399          */
 400         deselectTab: function(index) {
 401             if (this.getTab(index) === this.get('activeTab')) {
 402                 this.set('activeTab', null);
 403             }
 404         },
 405
 406         /**
 407          * Makes the tab at the given index the active tab
 408          * @method selectTab
 409          * @param {Int} index The tab index to be made active
 410          */
 411         selectTab: function(index) {
 412             this.set('activeTab', this.getTab(index));
 413         },
 414
 415         _onActiveTabChange: function(e) {
 416             var activeIndex = this.get(ACTIVE_INDEX),
 417                 newIndex = this.getTabIndex(e.newValue);
 418
 419             if (activeIndex !== newIndex) {
 420                 if (!(this.set(ACTIVE_INDEX, newIndex)) ) { // NOTE: setting
 421                      // revert if activeIndex update fails (cancelled via beforeChange)
 422                     this.set(ACTIVE_TAB, e.prevValue);
 423                 }
 424             }
 425         },
 426
 427         _onActiveIndexChange: function(e) {
 428             // no set if called from ActiveTabChange event
 429             if (e.newValue !== this.getTabIndex(this.get(ACTIVE_TAB))) {
 430                 if (!(this.set(ACTIVE_TAB, this.getTab(e.newValue))) ) { // NOTE: setting
 431                      // revert if activeTab update fails (cancelled via beforeChange)
 432                     this.set(ACTIVE_INDEX, e.prevValue);
 433                 }
 434             }
 435         },
 436
 437         /**
 438          * Creates Tab instances from a collection of HTMLElements.
 439          * @method _initTabs
 440          * @private
 441          * @return void
 442          */
 443         _initTabs: function() {
 444             var tabs = Dom.getChildren(this._tabParent),
 445                 contentElements = Dom.getChildren(this._contentParent),
 446                 activeIndex = this.get(ACTIVE_INDEX),
 447                 tab,
 448                 attr,
 449                 active;
 450
 451             for (var i = 0, len = tabs.length; i < len; ++i) {
 452                 attr = {};
 453
 454                 if (contentElements[i]) {
 455                     attr.contentEl = contentElements[i];
 456                 }
 457
 458                 tab = new YAHOO.widget.Tab(tabs[i], attr);
 459                 this.addTab(tab);
 460
 461                 if (tab.hasClass(tab.ACTIVE_CLASSNAME) ) {
 462                     active = tab;
 463                 }
 464             }
 465             if (activeIndex) {
 466                 this.set(ACTIVE_TAB, this.getTab(activeIndex));
 467             } else {
 468                 this._configs.activeTab.value = active; // dont invoke method
 469                 this._configs.activeIndex.value = this.getTabIndex(active);
 470             }
 471         },
 472
 473         _createTabViewElement: function(attr) {
 474             var el = document.createElement('div');
 475
 476             if ( this.CLASSNAME ) {
 477                 el.className = this.CLASSNAME;
 478             }
 479
 480             return el;
 481         },
 482
 483         _createTabParent: function(attr) {
 484             var el = document.createElement('ul');
 485
 486             if ( this.TAB_PARENT_CLASSNAME ) {
 487                 el.className = this.TAB_PARENT_CLASSNAME;
 488             }
 489
 490             this.get(ELEMENT).appendChild(el);
 491
 492             return el;
 493         },
 494
 495         _createContentParent: function(attr) {
 496             var el = document.createElement('div');
 497
 498             if ( this.CONTENT_PARENT_CLASSNAME ) {
 499                 el.className = this.CONTENT_PARENT_CLASSNAME;
 500             }
 501
 502             this.get(ELEMENT).appendChild(el);
 503
 504             return el;
 505         }
 506     });
 507
 508
 509     YAHOO.widget.TabView = TabView;
 510 })();
 511
 512 (function() {
 513     var Y = YAHOO.util,
 514         Dom = Y.Dom,
 515         Lang = YAHOO.lang,
 516
 517
 518     // STRING CONSTANTS
 519         ACTIVE_TAB = 'activeTab',
 520         LABEL = 'label',
 521         LABEL_EL = 'labelEl',
 522         CONTENT = 'content',
 523         CONTENT_EL = 'contentEl',
 524         ELEMENT = 'element',
 525         CACHE_DATA = 'cacheData',
 526         DATA_SRC = 'dataSrc',
 527         DATA_LOADED = 'dataLoaded',
 528         DATA_TIMEOUT = 'dataTimeout',
 529         LOAD_METHOD = 'loadMethod',
 530         POST_DATA = 'postData',
 531         DISABLED = 'disabled',
 532
 533     /**
 534      * A representation of a Tab's label and content.
 535      * @namespace YAHOO.widget
 536      * @class Tab
 537      * @extends YAHOO.util.Element
 538      * @constructor
 539      * @param element {HTMLElement | String} (optional) The html element that
 540      * represents the TabView. An element will be created if none provided.
 541      * @param {Object} properties A key map of initial properties
 542      */
 543     Tab = function(el, attr) {
 544         attr = attr || {};
 545         if (arguments.length == 1 && !Lang.isString(el) && !el.nodeName) {
 546             attr = el;
 547             el = attr.element;
 548         }
 549
 550         if (!el && !attr.element) {
 551             el = this._createTabElement(attr);
 552         }
 553
 554         this.loadHandler =  {
 555             success: function(o) {
 556                 this.set(CONTENT, o.responseText);
 557             },
 558             failure: function(o) {
 559             }
 560         };
 561
 562         Tab.superclass.constructor.call(this, el, attr);
 563
 564         this.DOM_EVENTS = {}; // delegating to tabView
 565     };
 566
 567     YAHOO.extend(Tab, YAHOO.util.Element, {
 568         /**
 569          * The default tag name for a Tab's inner element.
 570          * @property LABEL_INNER_TAGNAME
 571          * @type String
 572          * @default "em"
 573          */
 574         LABEL_TAGNAME: 'em',
 575
 576         /**
 577          * The class name applied to active tabs.
 578          * @property ACTIVE_CLASSNAME
 579          * @type String
 580          * @default "selected"
 581          */
 582         ACTIVE_CLASSNAME: 'selected',
 583
 584         /**
 585          * The class name applied to active tabs.
 586          * @property ACTIVE_CLASSNAME
 587          * @type String
 588          * @default "selected"
 589          */
 590         HIDDEN_CLASSNAME: 'yui-hidden',
 591
 592         /**
 593          * The title applied to active tabs.
 594          * @property ACTIVE_TITLE
 595          * @type String
 596          * @default "active"
 597          */
 598         ACTIVE_TITLE: 'active',
 599
 600         /**
 601          * The class name applied to disabled tabs.
 602          * @property DISABLED_CLASSNAME
 603          * @type String
 604          * @default "disabled"
 605          */
 606         DISABLED_CLASSNAME: DISABLED,
 607
 608         /**
 609          * The class name applied to dynamic tabs while loading.
 610          * @property LOADING_CLASSNAME
 611          * @type String
 612          * @default "disabled"
 613          */
 614         LOADING_CLASSNAME: 'loading',
 615
 616         /**
 617          * Provides a reference to the connection request object when data is
 618          * loaded dynamically.
 619          * @property dataConnection
 620          * @type Object
 621          */
 622         dataConnection: null,
 623
 624         /**
 625          * Object containing success and failure callbacks for loading data.
 626          * @property loadHandler
 627          * @type object
 628          */
 629         loadHandler: null,
 630
 631         _loading: false,
 632
 633         /**
 634          * Provides a readable name for the tab.
 635          * @method toString
 636          * @return String
 637          */
 638         toString: function() {
 639             var el = this.get(ELEMENT),
 640                 id = el.id || el.tagName;
 641             return "Tab " + id;
 642         },
 643
 644         /**
 645          * setAttributeConfigs TabView specific properties.
 646          * @method initAttributes
 647          * @param {Object} attr Hash of initial attributes
 648          */
 649         initAttributes: function(attr) {
 650             attr = attr || {};
 651             Tab.superclass.initAttributes.call(this, attr);
 652
 653             /**
 654              * The event that triggers the tab's activation.
 655              * @attribute activationEvent
 656              * @type String
 657              */
 658             this.setAttributeConfig('activationEvent', {
 659                 value: attr.activationEvent || 'click'
 660             });
 661
 662             /**
 663              * The element that contains the tab's label.
 664              * @attribute labelEl
 665              * @type HTMLElement
 666              */
 667             this.setAttributeConfig(LABEL_EL, {
 668                 value: attr[LABEL_EL] || this._getLabelEl(),
 669                 method: function(value) {
 670                     value = Dom.get(value);
 671                     var current = this.get(LABEL_EL);
 672
 673                     if (current) {
 674                         if (current == value) {
 675                             return false; // already set
 676                         }
 677
 678                         current.parentNode.replaceChild(value, current);
 679                         this.set(LABEL, value.innerHTML);
 680                     }
 681                 }
 682             });
 683
 684             /**
 685              * The tab's label text (or innerHTML).
 686              * @attribute label
 687              * @type String
 688              */
 689             this.setAttributeConfig(LABEL, {
 690                 value: attr.label || this._getLabel(),
 691                 method: function(value) {
 692                     var labelEl = this.get(LABEL_EL);
 693                     if (!labelEl) { // create if needed
 694                         this.set(LABEL_EL, this._createLabelEl());
 695                     }
 696
 697                     labelEl.innerHTML = value;
 698                 }
 699             });
 700
 701             /**
 702              * The HTMLElement that contains the tab's content.
 703              * @attribute contentEl
 704              * @type HTMLElement
 705              */
 706             this.setAttributeConfig(CONTENT_EL, {
 707                 value: attr[CONTENT_EL] || document.createElement('div'),
 708                 method: function(value) {
 709                     value = Dom.get(value);
 710                     var current = this.get(CONTENT_EL);
 711
 712                     if (current) {
 713                         if (current === value) {
 714                             return false; // already set
 715                         }
 716                         if (!this.get('selected')) {
 717                             Dom.addClass(value, 'yui-hidden');
 718                         }
 719                         current.parentNode.replaceChild(value, current);
 720                         this.set(CONTENT, value.innerHTML);
 721                     }
 722                 }
 723             });
 724
 725             /**
 726              * The tab's content.
 727              * @attribute content
 728              * @type String
 729              */
 730             this.setAttributeConfig(CONTENT, {
 731                 value: attr[CONTENT],
 732                 method: function(value) {
 733                     this.get(CONTENT_EL).innerHTML = value;
 734                 }
 735             });
 736
 737             /**
 738              * The tab's data source, used for loading content dynamically.
 739              * @attribute dataSrc
 740              * @type String
 741              */
 742             this.setAttributeConfig(DATA_SRC, {
 743                 value: attr.dataSrc
 744             });
 745
 746             /**
 747              * Whether or not content should be reloaded for every view.
 748              * @attribute cacheData
 749              * @type Boolean
 750              * @default false
 751              */
 752             this.setAttributeConfig(CACHE_DATA, {
 753                 value: attr.cacheData || false,
 754                 validator: Lang.isBoolean
 755             });
 756
 757             /**
 758              * The method to use for the data request.
 759              * @attribute loadMethod
 760              * @type String
 761              * @default "GET"
 762              */
 763             this.setAttributeConfig(LOAD_METHOD, {
 764                 value: attr.loadMethod || 'GET',
 765                 validator: Lang.isString
 766             });
 767
 768             /**
 769              * Whether or not any data has been loaded from the server.
 770              * @attribute dataLoaded
 771              * @type Boolean
 772              */
 773             this.setAttributeConfig(DATA_LOADED, {
 774                 value: false,
 775                 validator: Lang.isBoolean,
 776                 writeOnce: true
 777             });
 778
 779             /**
 780              * Number if milliseconds before aborting and calling failure handler.
 781              * @attribute dataTimeout
 782              * @type Number
 783              * @default null
 784              */
 785             this.setAttributeConfig(DATA_TIMEOUT, {
 786                 value: attr.dataTimeout || null,
 787                 validator: Lang.isNumber
 788             });
 789
 790             /**
 791              * Arguments to pass when POST method is used
 792              * @attribute postData
 793              * @default null
 794              */
 795             this.setAttributeConfig(POST_DATA, {
 796                 value: attr.postData || null
 797             });
 798
 799             /**
 800              * Whether or not the tab is currently active.
 801              * If a dataSrc is set for the tab, the content will be loaded from
 802              * the given source.
 803              * @attribute active
 804              * @type Boolean
 805              */
 806             this.setAttributeConfig('active', {
 807                 value: attr.active || this.hasClass(this.ACTIVE_CLASSNAME),
 808                 method: function(value) {
 809                     if (value === true) {
 810                         this.addClass(this.ACTIVE_CLASSNAME);
 811                         this.set('title', this.ACTIVE_TITLE);
 812                     } else {
 813                         this.removeClass(this.ACTIVE_CLASSNAME);
 814                         this.set('title', '');
 815                     }
 816                 },
 817                 validator: function(value) {
 818                     return Lang.isBoolean(value) && !this.get(DISABLED) ;
 819                 }
 820             });
 821
 822             /**
 823              * Whether or not the tab is disabled.
 824              * @attribute disabled
 825              * @type Boolean
 826              */
 827             this.setAttributeConfig(DISABLED, {
 828                 value: attr.disabled || this.hasClass(this.DISABLED_CLASSNAME),
 829                 method: function(value) {
 830                     if (value === true) {
 831                         Dom.addClass(this.get(ELEMENT), this.DISABLED_CLASSNAME);
 832                     } else {
 833                         Dom.removeClass(this.get(ELEMENT), this.DISABLED_CLASSNAME);
 834                     }
 835                 },
 836                 validator: Lang.isBoolean
 837             });
 838
 839             /**
 840              * The href of the tab's anchor element.
 841              * @attribute href
 842              * @type String
 843              * @default '#'
 844              */
 845             this.setAttributeConfig('href', {
 846                 value: attr.href ||
 847                         this.getElementsByTagName('a')[0].getAttribute('href', 2) || '#',
 848                 method: function(value) {
 849                     this.getElementsByTagName('a')[0].href = value;
 850                 },
 851                 validator: Lang.isString
 852             });
 853
 854             /**
 855              * The Whether or not the tab's content is visible.
 856              * @attribute contentVisible
 857              * @type Boolean
 858              * @default false
 859              */
 860             this.setAttributeConfig('contentVisible', {
 861                 value: attr.contentVisible,
 862                 method: function(value) {
 863                     if (value) {
 864                         Dom.removeClass(this.get(CONTENT_EL), this.HIDDEN_CLASSNAME);
 865
 866                         if ( this.get(DATA_SRC) ) {
 867                          // load dynamic content unless already loading or loaded and caching
 868                             if ( !this._loading && !(this.get(DATA_LOADED) && this.get(CACHE_DATA)) ) {
 869                                 this._dataConnect();
 870                             }
 871                         }
 872                     } else {
 873                         Dom.addClass(this.get(CONTENT_EL), this.HIDDEN_CLASSNAME);
 874                     }
 875                 },
 876                 validator: Lang.isBoolean
 877             });
 878         },
 879
 880         _dataConnect: function() {
 881             if (!Y.Connect) {
 882                 return false;
 883             }
 884
 885             Dom.addClass(this.get(CONTENT_EL).parentNode, this.LOADING_CLASSNAME);
 886             this._loading = true;
 887             this.dataConnection = Y.Connect.asyncRequest(
 888                 this.get(LOAD_METHOD),
 889                 this.get(DATA_SRC),
 890                 {
 891                     success: function(o) {
 892                         this.loadHandler.success.call(this, o);
 893                         this.set(DATA_LOADED, true);
 894                         this.dataConnection = null;
 895                         Dom.removeClass(this.get(CONTENT_EL).parentNode,
 896                                 this.LOADING_CLASSNAME);
 897                         this._loading = false;
 898                     },
 899                     failure: function(o) {
 900                         this.loadHandler.failure.call(this, o);
 901                         this.dataConnection = null;
 902                         Dom.removeClass(this.get(CONTENT_EL).parentNode,
 903                                 this.LOADING_CLASSNAME);
 904                         this._loading = false;
 905                     },
 906                     scope: this,
 907                     timeout: this.get(DATA_TIMEOUT)
 908                 },
 909
 910                 this.get(POST_DATA)
 911             );
 912         },
 913         _createTabElement: function(attr) {
 914             var el = document.createElement('li'),
 915                 a = document.createElement('a'),
 916                 label = attr.label || null,
 917                 labelEl = attr.labelEl || null;
 918
 919             a.href = attr.href || '#'; // TODO: Use Dom.setAttribute?
 920             el.appendChild(a);
 921
 922             if (labelEl) { // user supplied labelEl
 923                 if (!label) { // user supplied label
 924                     label = this._getLabel();
 925                 }
 926             } else {
 927                 labelEl = this._createLabelEl();
 928             }
 929
 930             a.appendChild(labelEl);
 931
 932             return el;
 933         },
 934
 935         _getLabelEl: function() {
 936             return this.getElementsByTagName(this.LABEL_TAGNAME)[0];
 937         },
 938
 939         _createLabelEl: function() {
 940             var el = document.createElement(this.LABEL_TAGNAME);
 941             return el;
 942         },
 943
 944
 945         _getLabel: function() {
 946             var el = this.get(LABEL_EL);
 947
 948                 if (!el) {
 949                     return undefined;
 950                 }
 951
 952             return el.innerHTML;
 953         },
 954
 955         _onActivate: function(e, tabview) {
 956             var tab = this,
 957                 silent = false;
 958
 959
 960             Y.Event.preventDefault(e);
 961             if (tab === tabview.get(ACTIVE_TAB)) {
 962                 silent = true; // dont fire activeTabChange if already active
 963             }
 964             tabview.set(ACTIVE_TAB, tab, silent);
 965         }
 966     });
 967
 968
 969     /**
 970      * Fires when a tab is removed from the tabview
 971      * @event remove
 972      * @type CustomEvent
 973      * @param {Event} An event object with fields for "type" ("remove")
 974      * and "tabview" (the tabview instance it was removed from)
 975      */
 976
 977     YAHOO.widget.Tab = Tab;
 978 })();
 979
 980 YAHOO.register("tabview", YAHOO.widget.TabView, {version: "2.7.0", build: "1799"});