koha-tt/intranet-tmpl/prog/en/lib/yui/tabview/tabview-debug.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: 2.8.0r4
   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             tabs.splice(index, 0, tab);
 110
 111             if ( before ) {
 112                 tabParent.insertBefore(tabElement, before.get(ELEMENT));
 113             } else {
 114                 tabParent.appendChild(tabElement);
 115             }
 116
 117             if ( contentEl && !Dom.isAncestor(contentParent, contentEl) ) {
 118                 contentParent.appendChild(contentEl);
 119             }
 120
 121             if ( !tab.get(ACTIVE) ) {
 122                 tab.set('contentVisible', false, true); /* hide if not active */
 123             } else {
 124                 this.set(ACTIVE_TAB, tab, true);
 125                 this.set('activeIndex', index, true);
 126             }
 127
 128             this._initTabEvents(tab);
 129         },
 130
 131         _initTabEvents: function(tab) {
 132             tab.addListener( tab.get('activationEvent'), tab._onActivate, this, tab);
 133             tab.addListener( tab.get('activationEventChange'), tab._onActivationEventChange, this, tab);
 134         },
 135
 136         _removeTabEvents: function(tab) {
 137             tab.removeListener(tab.get('activationEvent'), tab._onActivate, this, tab);
 138             tab.removeListener('activationEventChange', tab._onActivationEventChange, this, tab);
 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._removeTabEvents(tab);
 225             this._tabParent.removeChild( tab.get(ELEMENT) );
 226             this._contentParent.removeChild( tab.get(CONTENT_EL) );
 227             this._configs.tabs.value.splice(index, 1);
 228
 229             tab.fireEvent('remove', { type: 'remove', tabview: this });
 230         },
 231
 232         /**
 233          * Provides a readable name for the TabView instance.
 234          * @method toString
 235          * @return String
 236          */
 237         toString: function() {
 238             var name = this.get('id') || this.get('tagName');
 239             return "TabView " + name;
 240         },
 241
 242         /**
 243          * The transiton to use when switching between tabs.
 244          * @method contentTransition
 245          */
 246         contentTransition: function(newTab, oldTab) {
 247             if (newTab) {
 248                 newTab.set('contentVisible', true);
 249             }
 250             if (oldTab) {
 251                 oldTab.set('contentVisible', false);
 252             }
 253         },
 254
 255         /**
 256          * setAttributeConfigs TabView specific properties.
 257          * @method initAttributes
 258          * @param {Object} attr Hash of initial attributes
 259          */
 260         initAttributes: function(attr) {
 261             TabView.superclass.initAttributes.call(this, attr);
 262
 263             if (!attr.orientation) {
 264                 attr.orientation = 'top';
 265             }
 266
 267             var el = this.get(ELEMENT);
 268
 269             if (!Dom.hasClass(el, this.CLASSNAME)) {
 270                 Dom.addClass(el, this.CLASSNAME);
 271             }
 272
 273             /**
 274              * The Tabs belonging to the TabView instance.
 275              * @attribute tabs
 276              * @type Array
 277              */
 278             this.setAttributeConfig('tabs', {
 279                 value: [],
 280                 readOnly: true
 281             });
 282
 283             /**
 284              * The container of the tabView's label elements.
 285              * @property _tabParent
 286              * @private
 287              * @type HTMLElement
 288              */
 289             this._tabParent =
 290                     this.getElementsByClassName(this.TAB_PARENT_CLASSNAME,
 291                             'ul' )[0] || this._createTabParent();
 292
 293             /**
 294              * The container of the tabView's content elements.
 295              * @property _contentParent
 296              * @type HTMLElement
 297              * @private
 298              */
 299             this._contentParent =
 300                     this.getElementsByClassName(this.CONTENT_PARENT_CLASSNAME,
 301                             'div')[0] ||  this._createContentParent();
 302
 303             /**
 304              * How the Tabs should be oriented relative to the TabView.
 305              * @attribute orientation
 306              * @type String
 307              * @default "top"
 308              */
 309             this.setAttributeConfig('orientation', {
 310                 value: attr.orientation,
 311                 method: function(value) {
 312                     var current = this.get('orientation');
 313                     this.addClass('yui-navset-' + value);
 314
 315                     if (current != value) {
 316                         this.removeClass('yui-navset-' + current);
 317                     }
 318
 319                     if (value === 'bottom') {
 320                         this.appendChild(this._tabParent);
 321                     }
 322                 }
 323             });
 324
 325             /**
 326              * The index of the tab currently active.
 327              * @attribute activeIndex
 328              * @type Int
 329              */
 330             this.setAttributeConfig(ACTIVE_INDEX, {
 331                 value: attr.activeIndex,
 332                 validator: function(value) {
 333                     var ret = true;
 334                     if (value && this.getTab(value).get('disabled')) { // cannot activate if disabled
 335                         ret = false;
 336                     }
 337                     return ret;
 338                 }
 339             });
 340
 341             /**
 342              * The tab currently active.
 343              * @attribute activeTab
 344              * @type YAHOO.widget.Tab
 345              */
 346             this.setAttributeConfig(ACTIVE_TAB, {
 347                 value: attr.activeTab,
 348                 method: function(tab) {
 349                     var activeTab = this.get(ACTIVE_TAB);
 350
 351                     if (tab) {
 352                         tab.set(ACTIVE, true);
 353                     }
 354
 355                     if (activeTab && activeTab !== tab) {
 356                         activeTab.set(ACTIVE, false);
 357                     }
 358
 359                     if (activeTab && tab !== activeTab) { // no transition if only 1
 360                         this.contentTransition(tab, activeTab);
 361                     } else if (tab) {
 362                         tab.set('contentVisible', true);
 363                     }
 364                 },
 365                 validator: function(value) {
 366                     var ret = true;
 367                     if (value && value.get('disabled')) { // cannot activate if disabled
 368                         ret = false;
 369                     }
 370                     return ret;
 371                 }
 372             });
 373
 374             this.on('activeTabChange', this._onActiveTabChange);
 375             this.on('activeIndexChange', this._onActiveIndexChange);
 376
 377             YAHOO.log('attributes initialized', 'info', 'TabView');
 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             YAHOO.log('TabView Dom created', 'info', 'TabView');
 481             return el;
 482         },
 483
 484         _createTabParent: function(attr) {
 485             var el = document.createElement('ul');
 486
 487             if ( this.TAB_PARENT_CLASSNAME ) {
 488                 el.className = this.TAB_PARENT_CLASSNAME;
 489             }
 490
 491             this.get(ELEMENT).appendChild(el);
 492
 493             return el;
 494         },
 495
 496         _createContentParent: function(attr) {
 497             var el = document.createElement('div');
 498
 499             if ( this.CONTENT_PARENT_CLASSNAME ) {
 500                 el.className = this.CONTENT_PARENT_CLASSNAME;
 501             }
 502
 503             this.get(ELEMENT).appendChild(el);
 504
 505             return el;
 506         }
 507     });
 508
 509
 510     YAHOO.widget.TabView = TabView;
 511 })();
 512
 513 (function() {
 514     var Y = YAHOO.util,
 515         Dom = Y.Dom,
 516         Lang = YAHOO.lang,
 517
 518
 519     // STRING CONSTANTS
 520         ACTIVE_TAB = 'activeTab',
 521         LABEL = 'label',
 522         LABEL_EL = 'labelEl',
 523         CONTENT = 'content',
 524         CONTENT_EL = 'contentEl',
 525         ELEMENT = 'element',
 526         CACHE_DATA = 'cacheData',
 527         DATA_SRC = 'dataSrc',
 528         DATA_LOADED = 'dataLoaded',
 529         DATA_TIMEOUT = 'dataTimeout',
 530         LOAD_METHOD = 'loadMethod',
 531         POST_DATA = 'postData',
 532         DISABLED = 'disabled',
 533
 534     /**
 535      * A representation of a Tab's label and content.
 536      * @namespace YAHOO.widget
 537      * @class Tab
 538      * @extends YAHOO.util.Element
 539      * @constructor
 540      * @param element {HTMLElement | String} (optional) The html element that
 541      * represents the Tab. An element will be created if none provided.
 542      * @param {Object} properties A key map of initial properties
 543      */
 544     Tab = function(el, attr) {
 545         attr = attr || {};
 546         if (arguments.length == 1 && !Lang.isString(el) && !el.nodeName) {
 547             attr = el;
 548             el = attr.element;
 549         }
 550
 551         if (!el && !attr.element) {
 552             el = this._createTabElement(attr);
 553         }
 554
 555         this.loadHandler =  {
 556             success: function(o) {
 557                 this.set(CONTENT, o.responseText);
 558             },
 559             failure: function(o) {
 560             }
 561         };
 562
 563         Tab.superclass.constructor.call(this, el, attr);
 564
 565         this.DOM_EVENTS = {}; // delegating to tabView
 566     };
 567
 568     YAHOO.extend(Tab, YAHOO.util.Element, {
 569         /**
 570          * The default tag name for a Tab's inner element.
 571          * @property LABEL_INNER_TAGNAME
 572          * @type String
 573          * @default "em"
 574          */
 575         LABEL_TAGNAME: 'em',
 576
 577         /**
 578          * The class name applied to active tabs.
 579          * @property ACTIVE_CLASSNAME
 580          * @type String
 581          * @default "selected"
 582          */
 583         ACTIVE_CLASSNAME: 'selected',
 584
 585         /**
 586          * The class name applied to active tabs.
 587          * @property HIDDEN_CLASSNAME
 588          * @type String
 589          * @default "yui-hidden"
 590          */
 591         HIDDEN_CLASSNAME: 'yui-hidden',
 592
 593         /**
 594          * The title applied to active tabs.
 595          * @property ACTIVE_TITLE
 596          * @type String
 597          * @default "active"
 598          */
 599         ACTIVE_TITLE: 'active',
 600
 601         /**
 602          * The class name applied to disabled tabs.
 603          * @property DISABLED_CLASSNAME
 604          * @type String
 605          * @default "disabled"
 606          */
 607         DISABLED_CLASSNAME: DISABLED,
 608
 609         /**
 610          * The class name applied to dynamic tabs while loading.
 611          * @property LOADING_CLASSNAME
 612          * @type String
 613          * @default "disabled"
 614          */
 615         LOADING_CLASSNAME: 'loading',
 616
 617         /**
 618          * Provides a reference to the connection request object when data is
 619          * loaded dynamically.
 620          * @property dataConnection
 621          * @type Object
 622          */
 623         dataConnection: null,
 624
 625         /**
 626          * Object containing success and failure callbacks for loading data.
 627          * @property loadHandler
 628          * @type object
 629          */
 630         loadHandler: null,
 631
 632         _loading: false,
 633
 634         /**
 635          * Provides a readable name for the tab.
 636          * @method toString
 637          * @return String
 638          */
 639         toString: function() {
 640             var el = this.get(ELEMENT),
 641                 id = el.id || el.tagName;
 642             return "Tab " + id;
 643         },
 644
 645         /**
 646          * setAttributeConfigs Tab specific properties.
 647          * @method initAttributes
 648          * @param {Object} attr Hash of initial attributes
 649          */
 650         initAttributes: function(attr) {
 651             attr = attr || {};
 652             Tab.superclass.initAttributes.call(this, attr);
 653
 654             /**
 655              * The event that triggers the tab's activation.
 656              * @attribute activationEvent
 657              * @type String
 658              */
 659             this.setAttributeConfig('activationEvent', {
 660                 value: attr.activationEvent || 'click'
 661             });
 662
 663             /**
 664              * The element that contains the tab's label.
 665              * @attribute labelEl
 666              * @type HTMLElement
 667              */
 668             this.setAttributeConfig(LABEL_EL, {
 669                 value: attr[LABEL_EL] || this._getLabelEl(),
 670                 method: function(value) {
 671                     value = Dom.get(value);
 672                     var current = this.get(LABEL_EL);
 673
 674                     if (current) {
 675                         if (current == value) {
 676                             return false; // already set
 677                         }
 678
 679                         current.parentNode.replaceChild(value, current);
 680                         this.set(LABEL, value.innerHTML);
 681                     }
 682                 }
 683             });
 684
 685             /**
 686              * The tab's label text (or innerHTML).
 687              * @attribute label
 688              * @type String
 689              */
 690             this.setAttributeConfig(LABEL, {
 691                 value: attr.label || this._getLabel(),
 692                 method: function(value) {
 693                     var labelEl = this.get(LABEL_EL);
 694                     if (!labelEl) { // create if needed
 695                         this.set(LABEL_EL, this._createLabelEl());
 696                     }
 697
 698                     labelEl.innerHTML = value;
 699                 }
 700             });
 701
 702             /**
 703              * The HTMLElement that contains the tab's content.
 704              * @attribute contentEl
 705              * @type HTMLElement
 706              */
 707             this.setAttributeConfig(CONTENT_EL, {
 708                 value: attr[CONTENT_EL] || document.createElement('div'),
 709                 method: function(value) {
 710                     value = Dom.get(value);
 711                     var current = this.get(CONTENT_EL);
 712
 713                     if (current) {
 714                         if (current === value) {
 715                             return false; // already set
 716                         }
 717                         if (!this.get('selected')) {
 718                             Dom.addClass(value, this.HIDDEN_CLASSNAME);
 719                         }
 720                         current.parentNode.replaceChild(value, current);
 721                         this.set(CONTENT, value.innerHTML);
 722                     }
 723                 }
 724             });
 725
 726             /**
 727              * The tab's content.
 728              * @attribute content
 729              * @type String
 730              */
 731             this.setAttributeConfig(CONTENT, {
 732                 value: attr[CONTENT],
 733                 method: function(value) {
 734                     this.get(CONTENT_EL).innerHTML = value;
 735                 }
 736             });
 737
 738             /**
 739              * The tab's data source, used for loading content dynamically.
 740              * @attribute dataSrc
 741              * @type String
 742              */
 743             this.setAttributeConfig(DATA_SRC, {
 744                 value: attr.dataSrc
 745             });
 746
 747             /**
 748              * Whether or not content should be reloaded for every view.
 749              * @attribute cacheData
 750              * @type Boolean
 751              * @default false
 752              */
 753             this.setAttributeConfig(CACHE_DATA, {
 754                 value: attr.cacheData || false,
 755                 validator: Lang.isBoolean
 756             });
 757
 758             /**
 759              * The method to use for the data request.
 760              * @attribute loadMethod
 761              * @type String
 762              * @default "GET"
 763              */
 764             this.setAttributeConfig(LOAD_METHOD, {
 765                 value: attr.loadMethod || 'GET',
 766                 validator: Lang.isString
 767             });
 768
 769             /**
 770              * Whether or not any data has been loaded from the server.
 771              * @attribute dataLoaded
 772              * @type Boolean
 773              */
 774             this.setAttributeConfig(DATA_LOADED, {
 775                 value: false,
 776                 validator: Lang.isBoolean,
 777                 writeOnce: true
 778             });
 779
 780             /**
 781              * Number if milliseconds before aborting and calling failure handler.
 782              * @attribute dataTimeout
 783              * @type Number
 784              * @default null
 785              */
 786             this.setAttributeConfig(DATA_TIMEOUT, {
 787                 value: attr.dataTimeout || null,
 788                 validator: Lang.isNumber
 789             });
 790
 791             /**
 792              * Arguments to pass when POST method is used
 793              * @attribute postData
 794              * @default null
 795              */
 796             this.setAttributeConfig(POST_DATA, {
 797                 value: attr.postData || null
 798             });
 799
 800             /**
 801              * Whether or not the tab is currently active.
 802              * If a dataSrc is set for the tab, the content will be loaded from
 803              * the given source.
 804              * @attribute active
 805              * @type Boolean
 806              */
 807             this.setAttributeConfig('active', {
 808                 value: attr.active || this.hasClass(this.ACTIVE_CLASSNAME),
 809                 method: function(value) {
 810                     if (value === true) {
 811                         this.addClass(this.ACTIVE_CLASSNAME);
 812                         this.set('title', this.ACTIVE_TITLE);
 813                     } else {
 814                         this.removeClass(this.ACTIVE_CLASSNAME);
 815                         this.set('title', '');
 816                     }
 817                 },
 818                 validator: function(value) {
 819                     return Lang.isBoolean(value) && !this.get(DISABLED) ;
 820                 }
 821             });
 822
 823             /**
 824              * Whether or not the tab is disabled.
 825              * @attribute disabled
 826              * @type Boolean
 827              */
 828             this.setAttributeConfig(DISABLED, {
 829                 value: attr.disabled || this.hasClass(this.DISABLED_CLASSNAME),
 830                 method: function(value) {
 831                     if (value === true) {
 832                         Dom.addClass(this.get(ELEMENT), this.DISABLED_CLASSNAME);
 833                     } else {
 834                         Dom.removeClass(this.get(ELEMENT), this.DISABLED_CLASSNAME);
 835                     }
 836                 },
 837                 validator: Lang.isBoolean
 838             });
 839
 840             /**
 841              * The href of the tab's anchor element.
 842              * @attribute href
 843              * @type String
 844              * @default '#'
 845              */
 846             this.setAttributeConfig('href', {
 847                 value: attr.href ||
 848                         this.getElementsByTagName('a')[0].getAttribute('href', 2) || '#',
 849                 method: function(value) {
 850                     this.getElementsByTagName('a')[0].href = value;
 851                 },
 852                 validator: Lang.isString
 853             });
 854
 855             /**
 856              * The Whether or not the tab's content is visible.
 857              * @attribute contentVisible
 858              * @type Boolean
 859              * @default false
 860              */
 861             this.setAttributeConfig('contentVisible', {
 862                 value: attr.contentVisible,
 863                 method: function(value) {
 864                     if (value) {
 865                         Dom.removeClass(this.get(CONTENT_EL), this.HIDDEN_CLASSNAME);
 866
 867                         if ( this.get(DATA_SRC) ) {
 868                          // load dynamic content unless already loading or loaded and caching
 869                             if ( !this._loading && !(this.get(DATA_LOADED) && this.get(CACHE_DATA)) ) {
 870                                 this._dataConnect();
 871                             }
 872                         }
 873                     } else {
 874                         Dom.addClass(this.get(CONTENT_EL), this.HIDDEN_CLASSNAME);
 875                     }
 876                 },
 877                 validator: Lang.isBoolean
 878             });
 879             YAHOO.log('attributes initialized', 'info', 'Tab');
 880         },
 881
 882         _dataConnect: function() {
 883             if (!Y.Connect) {
 884                 YAHOO.log('YAHOO.util.Connect dependency not met',
 885                         'error', 'Tab');
 886                 return false;
 887             }
 888
 889             Dom.addClass(this.get(CONTENT_EL).parentNode, this.LOADING_CLASSNAME);
 890             this._loading = true;
 891             this.dataConnection = Y.Connect.asyncRequest(
 892                 this.get(LOAD_METHOD),
 893                 this.get(DATA_SRC),
 894                 {
 895                     success: function(o) {
 896                         YAHOO.log('content loaded successfully', 'info', 'Tab');
 897                         this.loadHandler.success.call(this, o);
 898                         this.set(DATA_LOADED, true);
 899                         this.dataConnection = null;
 900                         Dom.removeClass(this.get(CONTENT_EL).parentNode,
 901                                 this.LOADING_CLASSNAME);
 902                         this._loading = false;
 903                     },
 904                     failure: function(o) {
 905                         YAHOO.log('loading failed: ' + o.statusText, 'error', 'Tab');
 906                         this.loadHandler.failure.call(this, o);
 907                         this.dataConnection = null;
 908                         Dom.removeClass(this.get(CONTENT_EL).parentNode,
 909                                 this.LOADING_CLASSNAME);
 910                         this._loading = false;
 911                     },
 912                     scope: this,
 913                     timeout: this.get(DATA_TIMEOUT)
 914                 },
 915
 916                 this.get(POST_DATA)
 917             );
 918         },
 919         _createTabElement: function(attr) {
 920             var el = document.createElement('li'),
 921                 a = document.createElement('a'),
 922                 label = attr.label || null,
 923                 labelEl = attr.labelEl || null;
 924
 925             a.href = attr.href || '#'; // TODO: Use Dom.setAttribute?
 926             el.appendChild(a);
 927
 928             if (labelEl) { // user supplied labelEl
 929                 if (!label) { // user supplied label
 930                     label = this._getLabel();
 931                 }
 932             } else {
 933                 labelEl = this._createLabelEl();
 934             }
 935
 936             a.appendChild(labelEl);
 937
 938             YAHOO.log('creating Tab Dom', 'info', 'Tab');
 939             return el;
 940         },
 941
 942         _getLabelEl: function() {
 943             return this.getElementsByTagName(this.LABEL_TAGNAME)[0];
 944         },
 945
 946         _createLabelEl: function() {
 947             var el = document.createElement(this.LABEL_TAGNAME);
 948             return el;
 949         },
 950
 951
 952         _getLabel: function() {
 953             var el = this.get(LABEL_EL);
 954
 955                 if (!el) {
 956                     return undefined;
 957                 }
 958
 959             return el.innerHTML;
 960         },
 961
 962         _onActivate: function(e, tabview) {
 963             var tab = this,
 964                 silent = false;
 965
 966             Y.Event.preventDefault(e);
 967             if (tab === tabview.get(ACTIVE_TAB)) {
 968                 silent = true; // dont fire activeTabChange if already active
 969             }
 970             tabview.set(ACTIVE_TAB, tab, silent);
 971         },
 972
 973         _onActivationEventChange: function(e) {
 974             var tab = this;
 975
 976             if (e.prevValue != e.newValue) {
 977                 tab.removeListener(e.prevValue, tab._onActivate);
 978                 tab.addListener(e.newValue, tab._onActivate, this, tab);
 979             }
 980         }
 981     });
 982
 983
 984     /**
 985      * Fires when a tab is removed from the tabview
 986      * @event remove
 987      * @type CustomEvent
 988      * @param {Event} An event object with fields for "type" ("remove")
 989      * and "tabview" (the tabview instance it was removed from)
 990      */
 991
 992     YAHOO.widget.Tab = Tab;
 993 })();
 994
 995 YAHOO.register("tabview", YAHOO.widget.TabView, {version: "2.8.0r4", build: "2449"});