resources/lib/oojs-ui/oojs-ui-widgets.js

   1 /*!
   2  * OOUI v0.27.4
   3  * https://www.mediawiki.org/wiki/OOUI
   4  *
   5  * Copyright 2011–2018 OOUI Team and other contributors.
   6  * Released under the MIT license
   7  * http://oojs.mit-license.org
   8  *
   9  * Date: 2018-06-27T17:25:08Z
  10  */
  11 ( function ( OO ) {
  12
  13 'use strict';
  14
  15 /**
  16  * DraggableElement is a mixin class used to create elements that can be clicked
  17  * and dragged by a mouse to a new position within a group. This class must be used
  18  * in conjunction with OO.ui.mixin.DraggableGroupElement, which provides a container for
  19  * the draggable elements.
  20  *
  21  * @abstract
  22  * @class
  23  *
  24  * @constructor
  25  * @param {Object} [config] Configuration options
  26  * @cfg {jQuery} [$handle] The part of the element which can be used for dragging, defaults to the whole element
  27  * @cfg {boolean} [draggable] The items are draggable. This can change with #toggleDraggable
  28  *  but the draggable state should be called from the DraggableGroupElement, which updates
  29  *  the whole group
  30  */
  31 OO.ui.mixin.DraggableElement = function OoUiMixinDraggableElement( config ) {
  32         config = config || {};
  33
  34         // Properties
  35         this.index = null;
  36         this.$handle = config.$handle || this.$element;
  37         this.wasHandleUsed = null;
  38
  39         // Initialize and events
  40         this.$element
  41                 .addClass( 'oo-ui-draggableElement' )
  42                 .on( {
  43                         mousedown: this.onDragMouseDown.bind( this ),
  44                         dragstart: this.onDragStart.bind( this ),
  45                         dragover: this.onDragOver.bind( this ),
  46                         dragend: this.onDragEnd.bind( this ),
  47                         drop: this.onDrop.bind( this )
  48                 } );
  49         this.$handle.addClass( 'oo-ui-draggableElement-handle' );
  50         this.toggleDraggable( config.draggable === undefined ? true : !!config.draggable );
  51 };
  52
  53 OO.initClass( OO.ui.mixin.DraggableElement );
  54
  55 /* Events */
  56
  57 /**
  58  * @event dragstart
  59  *
  60  * A dragstart event is emitted when the user clicks and begins dragging an item.
  61  * @param {OO.ui.mixin.DraggableElement} item The item the user has clicked and is dragging with the mouse.
  62  */
  63
  64 /**
  65  * @event dragend
  66  * A dragend event is emitted when the user drags an item and releases the mouse,
  67  * thus terminating the drag operation.
  68  */
  69
  70 /**
  71  * @event drop
  72  * A drop event is emitted when the user drags an item and then releases the mouse button
  73  * over a valid target.
  74  */
  75
  76 /* Static Properties */
  77
  78 /**
  79  * @inheritdoc OO.ui.mixin.ButtonElement
  80  */
  81 OO.ui.mixin.DraggableElement.static.cancelButtonMouseDownEvents = false;
  82
  83 /* Methods */
  84
  85 /**
  86  * Change the draggable state of this widget.
  87  * This allows users to temporarily halt the dragging operations.
  88  *
  89  * @param {boolean} isDraggable Widget supports draggable operations
  90  * @fires draggable
  91  */
  92 OO.ui.mixin.DraggableElement.prototype.toggleDraggable = function ( isDraggable ) {
  93         isDraggable = isDraggable !== undefined ? !!isDraggable : !this.draggable;
  94
  95         if ( this.draggable !== isDraggable ) {
  96                 this.draggable = isDraggable;
  97
  98                 this.$handle.toggleClass( 'oo-ui-draggableElement-undraggable', !this.draggable );
  99
 100                 // We make the entire element draggable, not just the handle, so that
 101                 // the whole element appears to move. wasHandleUsed prevents drags from
 102                 // starting outside the handle
 103                 this.$element.prop( 'draggable', this.draggable );
 104         }
 105 };
 106
 107 /**
 108  * Check the draggable state of this widget
 109  *
 110  * @return {boolean} Widget supports draggable operations
 111  */
 112 OO.ui.mixin.DraggableElement.prototype.isDraggable = function () {
 113         return this.draggable;
 114 };
 115
 116 /**
 117  * Respond to mousedown event.
 118  *
 119  * @private
 120  * @param {jQuery.Event} e Drag event
 121  */
 122 OO.ui.mixin.DraggableElement.prototype.onDragMouseDown = function ( e ) {
 123         if ( !this.isDraggable() ) {
 124                 return;
 125         }
 126
 127         this.wasHandleUsed =
 128                 // Optimization: if the handle is the whole element this is always true
 129                 this.$handle[ 0 ] === this.$element[ 0 ] ||
 130                 // Check the mousedown occurred inside the handle
 131                 OO.ui.contains( this.$handle[ 0 ], e.target, true );
 132 };
 133
 134 /**
 135  * Respond to dragstart event.
 136  *
 137  * @private
 138  * @param {jQuery.Event} e Drag event
 139  * @return {boolean} False if the event is cancelled
 140  * @fires dragstart
 141  */
 142 OO.ui.mixin.DraggableElement.prototype.onDragStart = function ( e ) {
 143         var element = this,
 144                 dataTransfer = e.originalEvent.dataTransfer;
 145
 146         if ( !this.wasHandleUsed || !this.isDraggable() ) {
 147                 return false;
 148         }
 149
 150         // Define drop effect
 151         dataTransfer.dropEffect = 'none';
 152         dataTransfer.effectAllowed = 'move';
 153         // Support: Firefox
 154         // We must set up a dataTransfer data property or Firefox seems to
 155         // ignore the fact the element is draggable.
 156         try {
 157                 dataTransfer.setData( 'application-x/OOUI-draggable', this.getIndex() );
 158         } catch ( err ) {
 159                 // The above is only for Firefox. Move on if it fails.
 160         }
 161         // Briefly add a 'clone' class to style the browser's native drag image
 162         this.$element.addClass( 'oo-ui-draggableElement-clone' );
 163         // Add placeholder class after the browser has rendered the clone
 164         setTimeout( function () {
 165                 element.$element
 166                         .removeClass( 'oo-ui-draggableElement-clone' )
 167                         .addClass( 'oo-ui-draggableElement-placeholder' );
 168         } );
 169         // Emit event
 170         this.emit( 'dragstart', this );
 171         return true;
 172 };
 173
 174 /**
 175  * Respond to dragend event.
 176  *
 177  * @private
 178  * @fires dragend
 179  */
 180 OO.ui.mixin.DraggableElement.prototype.onDragEnd = function () {
 181         this.$element.removeClass( 'oo-ui-draggableElement-placeholder' );
 182         this.emit( 'dragend' );
 183 };
 184
 185 /**
 186  * Handle drop event.
 187  *
 188  * @private
 189  * @param {jQuery.Event} e Drop event
 190  * @fires drop
 191  */
 192 OO.ui.mixin.DraggableElement.prototype.onDrop = function ( e ) {
 193         e.preventDefault();
 194         this.emit( 'drop', e );
 195 };
 196
 197 /**
 198  * In order for drag/drop to work, the dragover event must
 199  * return false and stop propogation.
 200  *
 201  * @param {jQuery.Event} e Drag event
 202  * @private
 203  */
 204 OO.ui.mixin.DraggableElement.prototype.onDragOver = function ( e ) {
 205         e.preventDefault();
 206 };
 207
 208 /**
 209  * Set item index.
 210  * Store it in the DOM so we can access from the widget drag event
 211  *
 212  * @private
 213  * @param {number} index Item index
 214  */
 215 OO.ui.mixin.DraggableElement.prototype.setIndex = function ( index ) {
 216         if ( this.index !== index ) {
 217                 this.index = index;
 218                 this.$element.data( 'index', index );
 219         }
 220 };
 221
 222 /**
 223  * Get item index
 224  *
 225  * @private
 226  * @return {number} Item index
 227  */
 228 OO.ui.mixin.DraggableElement.prototype.getIndex = function () {
 229         return this.index;
 230 };
 231
 232 /**
 233  * DraggableGroupElement is a mixin class used to create a group element to
 234  * contain draggable elements, which are items that can be clicked and dragged by a mouse.
 235  * The class is used with OO.ui.mixin.DraggableElement.
 236  *
 237  * @abstract
 238  * @class
 239  * @mixins OO.ui.mixin.GroupElement
 240  *
 241  * @constructor
 242  * @param {Object} [config] Configuration options
 243  * @cfg {string} [orientation] Item orientation: 'horizontal' or 'vertical'. The orientation
 244  *  should match the layout of the items. Items displayed in a single row
 245  *  or in several rows should use horizontal orientation. The vertical orientation should only be
 246  *  used when the items are displayed in a single column. Defaults to 'vertical'
 247  * @cfg {boolean} [draggable] The items are draggable. This can change with #toggleDraggable
 248  */
 249 OO.ui.mixin.DraggableGroupElement = function OoUiMixinDraggableGroupElement( config ) {
 250         // Configuration initialization
 251         config = config || {};
 252
 253         // Parent constructor
 254         OO.ui.mixin.GroupElement.call( this, config );
 255
 256         // Properties
 257         this.orientation = config.orientation || 'vertical';
 258         this.dragItem = null;
 259         this.itemKeys = {};
 260         this.dir = null;
 261         this.itemsOrder = null;
 262         this.draggable = config.draggable === undefined ? true : !!config.draggable;
 263
 264         // Events
 265         this.aggregate( {
 266                 dragstart: 'itemDragStart',
 267                 dragend: 'itemDragEnd',
 268                 drop: 'itemDrop'
 269         } );
 270         this.connect( this, {
 271                 itemDragStart: 'onItemDragStart',
 272                 itemDrop: 'onItemDropOrDragEnd',
 273                 itemDragEnd: 'onItemDropOrDragEnd'
 274         } );
 275
 276         // Initialize
 277         if ( Array.isArray( config.items ) ) {
 278                 this.addItems( config.items );
 279         }
 280         this.$element
 281                 .addClass( 'oo-ui-draggableGroupElement' )
 282                 .toggleClass( 'oo-ui-draggableGroupElement-horizontal', this.orientation === 'horizontal' );
 283 };
 284
 285 /* Setup */
 286 OO.mixinClass( OO.ui.mixin.DraggableGroupElement, OO.ui.mixin.GroupElement );
 287
 288 /* Events */
 289
 290 /**
 291  * An item has been dragged to a new position, but not yet dropped.
 292  *
 293  * @event drag
 294  * @param {OO.ui.mixin.DraggableElement} item Dragged item
 295  * @param {number} [newIndex] New index for the item
 296  */
 297
 298 /**
 299  * An item has been dropped at a new position.
 300  *
 301  * @event reorder
 302  * @param {OO.ui.mixin.DraggableElement} item Reordered item
 303  * @param {number} [newIndex] New index for the item
 304  */
 305
 306 /**
 307  * Draggable state of this widget has changed.
 308  *
 309  * @event draggable
 310  * @param {boolean} [draggable] Widget is draggable
 311  */
 312
 313 /* Methods */
 314
 315 /**
 316  * Change the draggable state of this widget.
 317  * This allows users to temporarily halt the dragging operations.
 318  *
 319  * @param {boolean} isDraggable Widget supports draggable operations
 320  * @fires draggable
 321  */
 322 OO.ui.mixin.DraggableGroupElement.prototype.toggleDraggable = function ( isDraggable ) {
 323         isDraggable = isDraggable !== undefined ? !!isDraggable : !this.draggable;
 324
 325         if ( this.draggable !== isDraggable ) {
 326                 this.draggable = isDraggable;
 327
 328                 // Tell the items their draggable state changed
 329                 this.getItems().forEach( function ( item ) {
 330                         item.toggleDraggable( this.draggable );
 331                 }.bind( this ) );
 332
 333                 // Emit event
 334                 this.emit( 'draggable', this.draggable );
 335         }
 336 };
 337
 338 /**
 339  * Check the draggable state of this widget
 340  *
 341  * @return {boolean} Widget supports draggable operations
 342  */
 343 OO.ui.mixin.DraggableGroupElement.prototype.isDraggable = function () {
 344         return this.draggable;
 345 };
 346
 347 /**
 348  * Respond to item drag start event
 349  *
 350  * @private
 351  * @param {OO.ui.mixin.DraggableElement} item Dragged item
 352  */
 353 OO.ui.mixin.DraggableGroupElement.prototype.onItemDragStart = function ( item ) {
 354         if ( !this.isDraggable() ) {
 355                 return;
 356         }
 357         // Make a shallow copy of this.items so we can re-order it during previews
 358         // without affecting the original array.
 359         this.itemsOrder = this.items.slice();
 360         this.updateIndexes();
 361         if ( this.orientation === 'horizontal' ) {
 362                 // Calculate and cache directionality on drag start - it's a little
 363                 // expensive and it shouldn't change while dragging.
 364                 this.dir = this.$element.css( 'direction' );
 365         }
 366         this.setDragItem( item );
 367 };
 368
 369 /**
 370  * Update the index properties of the items
 371  */
 372 OO.ui.mixin.DraggableGroupElement.prototype.updateIndexes = function () {
 373         var i, len;
 374
 375         // Map the index of each object
 376         for ( i = 0, len = this.itemsOrder.length; i < len; i++ ) {
 377                 this.itemsOrder[ i ].setIndex( i );
 378         }
 379 };
 380
 381 /**
 382  * Handle drop or dragend event and switch the order of the items accordingly
 383  *
 384  * @private
 385  * @param {OO.ui.mixin.DraggableElement} item Dropped item
 386  */
 387 OO.ui.mixin.DraggableGroupElement.prototype.onItemDropOrDragEnd = function () {
 388         var targetIndex, originalIndex,
 389                 item = this.getDragItem();
 390
 391         // TODO: Figure out a way to configure a list of legally droppable
 392         // elements even if they are not yet in the list
 393         if ( item ) {
 394                 originalIndex = this.items.indexOf( item );
 395                 // If the item has moved forward, add one to the index to account for the left shift
 396                 targetIndex = item.getIndex() + ( item.getIndex() > originalIndex ? 1 : 0 );
 397                 if ( targetIndex !== originalIndex ) {
 398                         this.reorder( this.getDragItem(), targetIndex );
 399                         this.emit( 'reorder', this.getDragItem(), targetIndex );
 400                 }
 401                 this.updateIndexes();
 402         }
 403         this.unsetDragItem();
 404         // Return false to prevent propogation
 405         return false;
 406 };
 407
 408 /**
 409  * Respond to dragover event
 410  *
 411  * @private
 412  * @param {jQuery.Event} e Dragover event
 413  * @fires reorder
 414  */
 415 OO.ui.mixin.DraggableGroupElement.prototype.onDragOver = function ( e ) {
 416         var overIndex, targetIndex,
 417                 item = this.getDragItem(),
 418                 dragItemIndex = item.getIndex();
 419
 420         // Get the OptionWidget item we are dragging over
 421         overIndex = $( e.target ).closest( '.oo-ui-draggableElement' ).data( 'index' );
 422
 423         if ( overIndex !== undefined && overIndex !== dragItemIndex ) {
 424                 targetIndex = overIndex + ( overIndex > dragItemIndex ? 1 : 0 );
 425
 426                 if ( targetIndex > 0 ) {
 427                         this.$group.children().eq( targetIndex - 1 ).after( item.$element );
 428                 } else {
 429                         this.$group.prepend( item.$element );
 430                 }
 431                 // Move item in itemsOrder array
 432                 this.itemsOrder.splice( overIndex, 0,
 433                         this.itemsOrder.splice( dragItemIndex, 1 )[ 0 ]
 434                 );
 435                 this.updateIndexes();
 436                 this.emit( 'drag', item, targetIndex );
 437         }
 438         // Prevent default
 439         e.preventDefault();
 440 };
 441
 442 /**
 443  * Reorder the items in the group
 444  *
 445  * @param {OO.ui.mixin.DraggableElement} item Reordered item
 446  * @param {number} newIndex New index
 447  */
 448 OO.ui.mixin.DraggableGroupElement.prototype.reorder = function ( item, newIndex ) {
 449         this.addItems( [ item ], newIndex );
 450 };
 451
 452 /**
 453  * Set a dragged item
 454  *
 455  * @param {OO.ui.mixin.DraggableElement} item Dragged item
 456  */
 457 OO.ui.mixin.DraggableGroupElement.prototype.setDragItem = function ( item ) {
 458         if ( this.dragItem !== item ) {
 459                 this.dragItem = item;
 460                 this.$element.on( 'dragover', this.onDragOver.bind( this ) );
 461                 this.$element.addClass( 'oo-ui-draggableGroupElement-dragging' );
 462         }
 463 };
 464
 465 /**
 466  * Unset the current dragged item
 467  */
 468 OO.ui.mixin.DraggableGroupElement.prototype.unsetDragItem = function () {
 469         if ( this.dragItem ) {
 470                 this.dragItem = null;
 471                 this.$element.off( 'dragover' );
 472                 this.$element.removeClass( 'oo-ui-draggableGroupElement-dragging' );
 473         }
 474 };
 475
 476 /**
 477  * Get the item that is currently being dragged.
 478  *
 479  * @return {OO.ui.mixin.DraggableElement|null} The currently dragged item, or `null` if no item is being dragged
 480  */
 481 OO.ui.mixin.DraggableGroupElement.prototype.getDragItem = function () {
 482         return this.dragItem;
 483 };
 484
 485 /**
 486  * RequestManager is a mixin that manages the lifecycle of a promise-backed request for a widget, such as
 487  * the {@link OO.ui.mixin.LookupElement}.
 488  *
 489  * @class
 490  * @abstract
 491  *
 492  * @constructor
 493  */
 494 OO.ui.mixin.RequestManager = function OoUiMixinRequestManager() {
 495         this.requestCache = {};
 496         this.requestQuery = null;
 497         this.requestRequest = null;
 498 };
 499
 500 /* Setup */
 501
 502 OO.initClass( OO.ui.mixin.RequestManager );
 503
 504 /**
 505  * Get request results for the current query.
 506  *
 507  * @return {jQuery.Promise} Promise object which will be passed response data as the first argument of
 508  *   the done event. If the request was aborted to make way for a subsequent request, this promise
 509  *   may not be rejected, depending on what jQuery feels like doing.
 510  */
 511 OO.ui.mixin.RequestManager.prototype.getRequestData = function () {
 512         var widget = this,
 513                 value = this.getRequestQuery(),
 514                 deferred = $.Deferred(),
 515                 ourRequest;
 516
 517         this.abortRequest();
 518         if ( Object.prototype.hasOwnProperty.call( this.requestCache, value ) ) {
 519                 deferred.resolve( this.requestCache[ value ] );
 520         } else {
 521                 if ( this.pushPending ) {
 522                         this.pushPending();
 523                 }
 524                 this.requestQuery = value;
 525                 ourRequest = this.requestRequest = this.getRequest();
 526                 ourRequest
 527                         .always( function () {
 528                                 // We need to pop pending even if this is an old request, otherwise
 529                                 // the widget will remain pending forever.
 530                                 // TODO: this assumes that an aborted request will fail or succeed soon after
 531                                 // being aborted, or at least eventually. It would be nice if we could popPending()
 532                                 // at abort time, but only if we knew that we hadn't already called popPending()
 533                                 // for that request.
 534                                 if ( widget.popPending ) {
 535                                         widget.popPending();
 536                                 }
 537                         } )
 538                         .done( function ( response ) {
 539                                 // If this is an old request (and aborting it somehow caused it to still succeed),
 540                                 // ignore its success completely
 541                                 if ( ourRequest === widget.requestRequest ) {
 542                                         widget.requestQuery = null;
 543                                         widget.requestRequest = null;
 544                                         widget.requestCache[ value ] = widget.getRequestCacheDataFromResponse( response );
 545                                         deferred.resolve( widget.requestCache[ value ] );
 546                                 }
 547                         } )
 548                         .fail( function () {
 549                                 // If this is an old request (or a request failing because it's being aborted),
 550                                 // ignore its failure completely
 551                                 if ( ourRequest === widget.requestRequest ) {
 552                                         widget.requestQuery = null;
 553                                         widget.requestRequest = null;
 554                                         deferred.reject();
 555                                 }
 556                         } );
 557         }
 558         return deferred.promise();
 559 };
 560
 561 /**
 562  * Abort the currently pending request, if any.
 563  *
 564  * @private
 565  */
 566 OO.ui.mixin.RequestManager.prototype.abortRequest = function () {
 567         var oldRequest = this.requestRequest;
 568         if ( oldRequest ) {
 569                 // First unset this.requestRequest to the fail handler will notice
 570                 // that the request is no longer current
 571                 this.requestRequest = null;
 572                 this.requestQuery = null;
 573                 oldRequest.abort();
 574         }
 575 };
 576
 577 /**
 578  * Get the query to be made.
 579  *
 580  * @protected
 581  * @method
 582  * @abstract
 583  * @return {string} query to be used
 584  */
 585 OO.ui.mixin.RequestManager.prototype.getRequestQuery = null;
 586
 587 /**
 588  * Get a new request object of the current query value.
 589  *
 590  * @protected
 591  * @method
 592  * @abstract
 593  * @return {jQuery.Promise} jQuery AJAX object, or promise object with an .abort() method
 594  */
 595 OO.ui.mixin.RequestManager.prototype.getRequest = null;
 596
 597 /**
 598  * Pre-process data returned by the request from #getRequest.
 599  *
 600  * The return value of this function will be cached, and any further queries for the given value
 601  * will use the cache rather than doing API requests.
 602  *
 603  * @protected
 604  * @method
 605  * @abstract
 606  * @param {Mixed} response Response from server
 607  * @return {Mixed} Cached result data
 608  */
 609 OO.ui.mixin.RequestManager.prototype.getRequestCacheDataFromResponse = null;
 610
 611 /**
 612  * LookupElement is a mixin that creates a {@link OO.ui.MenuSelectWidget menu} of suggested values for
 613  * a {@link OO.ui.TextInputWidget text input widget}. Suggested values are based on the characters the user types
 614  * into the text input field and, in general, the menu is only displayed when the user types. If a suggested value is chosen
 615  * from the lookup menu, that value becomes the value of the input field.
 616  *
 617  * Note that a new menu of suggested items is displayed when a value is chosen from the lookup menu. If this is
 618  * not the desired behavior, disable lookup menus with the #setLookupsDisabled method, then set the value, then
 619  * re-enable lookups.
 620  *
 621  * See the [OOUI demos][1] for an example.
 622  *
 623  * [1]: https://doc.wikimedia.org/oojs-ui/master/demos/#LookupElement-try-inputting-an-integer
 624  *
 625  * @class
 626  * @abstract
 627  * @mixins OO.ui.mixin.RequestManager
 628  *
 629  * @constructor
 630  * @param {Object} [config] Configuration options
 631  * @cfg {jQuery} [$overlay] Overlay for the lookup menu; defaults to relative positioning.
 632  *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
 633  * @cfg {jQuery} [$container=this.$element] The container element. The lookup menu is rendered beneath the specified element.
 634  * @cfg {Object} [menu] Configuration options to pass to {@link OO.ui.MenuSelectWidget menu select widget}
 635  * @cfg {boolean} [allowSuggestionsWhenEmpty=false] Request and display a lookup menu when the text input is empty.
 636  *  By default, the lookup menu is not generated and displayed until the user begins to type.
 637  * @cfg {boolean} [highlightFirst=true] Whether the first lookup result should be highlighted (so, that the user can
 638  *  take it over into the input with simply pressing return) automatically or not.
 639  */
 640 OO.ui.mixin.LookupElement = function OoUiMixinLookupElement( config ) {
 641         // Configuration initialization
 642         config = $.extend( { highlightFirst: true }, config );
 643
 644         // Mixin constructors
 645         OO.ui.mixin.RequestManager.call( this, config );
 646
 647         // Properties
 648         this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;
 649         this.lookupMenu = new OO.ui.MenuSelectWidget( $.extend( {
 650                 widget: this,
 651                 input: this,
 652                 $floatableContainer: config.$container || this.$element
 653         }, config.menu ) );
 654
 655         this.allowSuggestionsWhenEmpty = config.allowSuggestionsWhenEmpty || false;
 656
 657         this.lookupsDisabled = false;
 658         this.lookupInputFocused = false;
 659         this.lookupHighlightFirstItem = config.highlightFirst;
 660
 661         // Events
 662         this.$input.on( {
 663                 focus: this.onLookupInputFocus.bind( this ),
 664                 blur: this.onLookupInputBlur.bind( this ),
 665                 mousedown: this.onLookupInputMouseDown.bind( this )
 666         } );
 667         this.connect( this, { change: 'onLookupInputChange' } );
 668         this.lookupMenu.connect( this, {
 669                 toggle: 'onLookupMenuToggle',
 670                 choose: 'onLookupMenuItemChoose'
 671         } );
 672
 673         // Initialization
 674         this.$input.attr( {
 675                 role: 'combobox',
 676                 'aria-owns': this.lookupMenu.getElementId(),
 677                 'aria-autocomplete': 'list'
 678         } );
 679         this.$element.addClass( 'oo-ui-lookupElement' );
 680         this.lookupMenu.$element.addClass( 'oo-ui-lookupElement-menu' );
 681         this.$overlay.append( this.lookupMenu.$element );
 682 };
 683
 684 /* Setup */
 685
 686 OO.mixinClass( OO.ui.mixin.LookupElement, OO.ui.mixin.RequestManager );
 687
 688 /* Methods */
 689
 690 /**
 691  * Handle input focus event.
 692  *
 693  * @protected
 694  * @param {jQuery.Event} e Input focus event
 695  */
 696 OO.ui.mixin.LookupElement.prototype.onLookupInputFocus = function () {
 697         this.lookupInputFocused = true;
 698         this.populateLookupMenu();
 699 };
 700
 701 /**
 702  * Handle input blur event.
 703  *
 704  * @protected
 705  * @param {jQuery.Event} e Input blur event
 706  */
 707 OO.ui.mixin.LookupElement.prototype.onLookupInputBlur = function () {
 708         this.closeLookupMenu();
 709         this.lookupInputFocused = false;
 710 };
 711
 712 /**
 713  * Handle input mouse down event.
 714  *
 715  * @protected
 716  * @param {jQuery.Event} e Input mouse down event
 717  */
 718 OO.ui.mixin.LookupElement.prototype.onLookupInputMouseDown = function () {
 719         // Only open the menu if the input was already focused.
 720         // This way we allow the user to open the menu again after closing it with Esc
 721         // by clicking in the input. Opening (and populating) the menu when initially
 722         // clicking into the input is handled by the focus handler.
 723         if ( this.lookupInputFocused && !this.lookupMenu.isVisible() ) {
 724                 this.populateLookupMenu();
 725         }
 726 };
 727
 728 /**
 729  * Handle input change event.
 730  *
 731  * @protected
 732  * @param {string} value New input value
 733  */
 734 OO.ui.mixin.LookupElement.prototype.onLookupInputChange = function () {
 735         if ( this.lookupInputFocused ) {
 736                 this.populateLookupMenu();
 737         }
 738 };
 739
 740 /**
 741  * Handle the lookup menu being shown/hidden.
 742  *
 743  * @protected
 744  * @param {boolean} visible Whether the lookup menu is now visible.
 745  */
 746 OO.ui.mixin.LookupElement.prototype.onLookupMenuToggle = function ( visible ) {
 747         if ( !visible ) {
 748                 // When the menu is hidden, abort any active request and clear the menu.
 749                 // This has to be done here in addition to closeLookupMenu(), because
 750                 // MenuSelectWidget will close itself when the user presses Esc.
 751                 this.abortLookupRequest();
 752                 this.lookupMenu.clearItems();
 753         }
 754 };
 755
 756 /**
 757  * Handle menu item 'choose' event, updating the text input value to the value of the clicked item.
 758  *
 759  * @protected
 760  * @param {OO.ui.MenuOptionWidget} item Selected item
 761  */
 762 OO.ui.mixin.LookupElement.prototype.onLookupMenuItemChoose = function ( item ) {
 763         this.setValue( item.getData() );
 764 };
 765
 766 /**
 767  * Get lookup menu.
 768  *
 769  * @private
 770  * @return {OO.ui.MenuSelectWidget}
 771  */
 772 OO.ui.mixin.LookupElement.prototype.getLookupMenu = function () {
 773         return this.lookupMenu;
 774 };
 775
 776 /**
 777  * Disable or re-enable lookups.
 778  *
 779  * When lookups are disabled, calls to #populateLookupMenu will be ignored.
 780  *
 781  * @param {boolean} disabled Disable lookups
 782  */
 783 OO.ui.mixin.LookupElement.prototype.setLookupsDisabled = function ( disabled ) {
 784         this.lookupsDisabled = !!disabled;
 785 };
 786
 787 /**
 788  * Open the menu. If there are no entries in the menu, this does nothing.
 789  *
 790  * @private
 791  * @chainable
 792  */
 793 OO.ui.mixin.LookupElement.prototype.openLookupMenu = function () {
 794         if ( !this.lookupMenu.isEmpty() ) {
 795                 this.lookupMenu.toggle( true );
 796         }
 797         return this;
 798 };
 799
 800 /**
 801  * Close the menu, empty it, and abort any pending request.
 802  *
 803  * @private
 804  * @chainable
 805  */
 806 OO.ui.mixin.LookupElement.prototype.closeLookupMenu = function () {
 807         this.lookupMenu.toggle( false );
 808         this.abortLookupRequest();
 809         this.lookupMenu.clearItems();
 810         return this;
 811 };
 812
 813 /**
 814  * Request menu items based on the input's current value, and when they arrive,
 815  * populate the menu with these items and show the menu.
 816  *
 817  * If lookups have been disabled with #setLookupsDisabled, this function does nothing.
 818  *
 819  * @private
 820  * @chainable
 821  */
 822 OO.ui.mixin.LookupElement.prototype.populateLookupMenu = function () {
 823         var widget = this,
 824                 value = this.getValue();
 825
 826         if ( this.lookupsDisabled || this.isReadOnly() ) {
 827                 return;
 828         }
 829
 830         // If the input is empty, clear the menu, unless suggestions when empty are allowed.
 831         if ( !this.allowSuggestionsWhenEmpty && value === '' ) {
 832                 this.closeLookupMenu();
 833         // Skip population if there is already a request pending for the current value
 834         } else if ( value !== this.lookupQuery ) {
 835                 this.getLookupMenuItems()
 836                         .done( function ( items ) {
 837                                 widget.lookupMenu.clearItems();
 838                                 if ( items.length ) {
 839                                         widget.lookupMenu
 840                                                 .addItems( items )
 841                                                 .toggle( true );
 842                                         widget.initializeLookupMenuSelection();
 843                                 } else {
 844                                         widget.lookupMenu.toggle( false );
 845                                 }
 846                         } )
 847                         .fail( function () {
 848                                 widget.lookupMenu.clearItems();
 849                         } );
 850         }
 851
 852         return this;
 853 };
 854
 855 /**
 856  * Highlight the first selectable item in the menu, if configured.
 857  *
 858  * @private
 859  * @chainable
 860  */
 861 OO.ui.mixin.LookupElement.prototype.initializeLookupMenuSelection = function () {
 862         if ( this.lookupHighlightFirstItem && !this.lookupMenu.findSelectedItem() ) {
 863                 this.lookupMenu.highlightItem( this.lookupMenu.findFirstSelectableItem() );
 864         }
 865 };
 866
 867 /**
 868  * Get lookup menu items for the current query.
 869  *
 870  * @private
 871  * @return {jQuery.Promise} Promise object which will be passed menu items as the first argument of
 872  *   the done event. If the request was aborted to make way for a subsequent request, this promise
 873  *   will not be rejected: it will remain pending forever.
 874  */
 875 OO.ui.mixin.LookupElement.prototype.getLookupMenuItems = function () {
 876         return this.getRequestData().then( function ( data ) {
 877                 return this.getLookupMenuOptionsFromData( data );
 878         }.bind( this ) );
 879 };
 880
 881 /**
 882  * Abort the currently pending lookup request, if any.
 883  *
 884  * @private
 885  */
 886 OO.ui.mixin.LookupElement.prototype.abortLookupRequest = function () {
 887         this.abortRequest();
 888 };
 889
 890 /**
 891  * Get a new request object of the current lookup query value.
 892  *
 893  * @protected
 894  * @method
 895  * @abstract
 896  * @return {jQuery.Promise} jQuery AJAX object, or promise object with an .abort() method
 897  */
 898 OO.ui.mixin.LookupElement.prototype.getLookupRequest = null;
 899
 900 /**
 901  * Pre-process data returned by the request from #getLookupRequest.
 902  *
 903  * The return value of this function will be cached, and any further queries for the given value
 904  * will use the cache rather than doing API requests.
 905  *
 906  * @protected
 907  * @method
 908  * @abstract
 909  * @param {Mixed} response Response from server
 910  * @return {Mixed} Cached result data
 911  */
 912 OO.ui.mixin.LookupElement.prototype.getLookupCacheDataFromResponse = null;
 913
 914 /**
 915  * Get a list of menu option widgets from the (possibly cached) data returned by
 916  * #getLookupCacheDataFromResponse.
 917  *
 918  * @protected
 919  * @method
 920  * @abstract
 921  * @param {Mixed} data Cached result data, usually an array
 922  * @return {OO.ui.MenuOptionWidget[]} Menu items
 923  */
 924 OO.ui.mixin.LookupElement.prototype.getLookupMenuOptionsFromData = null;
 925
 926 /**
 927  * Set the read-only state of the widget.
 928  *
 929  * This will also disable/enable the lookups functionality.
 930  *
 931  * @param {boolean} readOnly Make input read-only
 932  * @chainable
 933  */
 934 OO.ui.mixin.LookupElement.prototype.setReadOnly = function ( readOnly ) {
 935         // Parent method
 936         // Note: Calling #setReadOnly this way assumes this is mixed into an OO.ui.TextInputWidget
 937         OO.ui.TextInputWidget.prototype.setReadOnly.call( this, readOnly );
 938
 939         // During construction, #setReadOnly is called before the OO.ui.mixin.LookupElement constructor
 940         if ( this.isReadOnly() && this.lookupMenu ) {
 941                 this.closeLookupMenu();
 942         }
 943
 944         return this;
 945 };
 946
 947 /**
 948  * @inheritdoc OO.ui.mixin.RequestManager
 949  */
 950 OO.ui.mixin.LookupElement.prototype.getRequestQuery = function () {
 951         return this.getValue();
 952 };
 953
 954 /**
 955  * @inheritdoc OO.ui.mixin.RequestManager
 956  */
 957 OO.ui.mixin.LookupElement.prototype.getRequest = function () {
 958         return this.getLookupRequest();
 959 };
 960
 961 /**
 962  * @inheritdoc OO.ui.mixin.RequestManager
 963  */
 964 OO.ui.mixin.LookupElement.prototype.getRequestCacheDataFromResponse = function ( response ) {
 965         return this.getLookupCacheDataFromResponse( response );
 966 };
 967
 968 /**
 969  * TabPanelLayouts are used within {@link OO.ui.IndexLayout index layouts} to create tab panels that
 970  * users can select and display from the index's optional {@link OO.ui.TabSelectWidget tab}
 971  * navigation. TabPanels are usually not instantiated directly, rather extended to include the
 972  * required content and functionality.
 973  *
 974  * Each tab panel must have a unique symbolic name, which is passed to the constructor. In addition,
 975  * the tab panel's tab item is customized (with a label) using the #setupTabItem method. See
 976  * {@link OO.ui.IndexLayout IndexLayout} for an example.
 977  *
 978  * @class
 979  * @extends OO.ui.PanelLayout
 980  *
 981  * @constructor
 982  * @param {string} name Unique symbolic name of tab panel
 983  * @param {Object} [config] Configuration options
 984  * @cfg {jQuery|string|Function|OO.ui.HtmlSnippet} [label] Label for tab panel's tab
 985  */
 986 OO.ui.TabPanelLayout = function OoUiTabPanelLayout( name, config ) {
 987         // Allow passing positional parameters inside the config object
 988         if ( OO.isPlainObject( name ) && config === undefined ) {
 989                 config = name;
 990                 name = config.name;
 991         }
 992
 993         // Configuration initialization
 994         config = $.extend( { scrollable: true }, config );
 995
 996         // Parent constructor
 997         OO.ui.TabPanelLayout.parent.call( this, config );
 998
 999         // Properties
1000         this.name = name;
1001         this.label = config.label;
1002         this.tabItem = null;
1003         this.active = false;
1004
1005         // Initialization
1006         this.$element.addClass( 'oo-ui-tabPanelLayout' );
1007 };
1008
1009 /* Setup */
1010
1011 OO.inheritClass( OO.ui.TabPanelLayout, OO.ui.PanelLayout );
1012
1013 /* Events */
1014
1015 /**
1016  * An 'active' event is emitted when the tab panel becomes active. Tab panels become active when they are
1017  * shown in a index layout that is configured to display only one tab panel at a time.
1018  *
1019  * @event active
1020  * @param {boolean} active Tab panel is active
1021  */
1022
1023 /* Methods */
1024
1025 /**
1026  * Get the symbolic name of the tab panel.
1027  *
1028  * @return {string} Symbolic name of tab panel
1029  */
1030 OO.ui.TabPanelLayout.prototype.getName = function () {
1031         return this.name;
1032 };
1033
1034 /**
1035  * Check if tab panel is active.
1036  *
1037  * Tab panels become active when they are shown in a {@link OO.ui.IndexLayout index layout} that is configured to
1038  * display only one tab panel at a time. Additional CSS is applied to the tab panel's tab item to reflect the
1039  * active state.
1040  *
1041  * @return {boolean} Tab panel is active
1042  */
1043 OO.ui.TabPanelLayout.prototype.isActive = function () {
1044         return this.active;
1045 };
1046
1047 /**
1048  * Get tab item.
1049  *
1050  * The tab item allows users to access the tab panel from the index's tab
1051  * navigation. The tab item itself can be customized (with a label, level, etc.) using the #setupTabItem method.
1052  *
1053  * @return {OO.ui.TabOptionWidget|null} Tab option widget
1054  */
1055 OO.ui.TabPanelLayout.prototype.getTabItem = function () {
1056         return this.tabItem;
1057 };
1058
1059 /**
1060  * Set or unset the tab item.
1061  *
1062  * Specify a {@link OO.ui.TabOptionWidget tab option} to set it,
1063  * or `null` to clear the tab item. To customize the tab item itself (e.g., to set a label or tab
1064  * level), use #setupTabItem instead of this method.
1065  *
1066  * @param {OO.ui.TabOptionWidget|null} tabItem Tab option widget, null to clear
1067  * @chainable
1068  */
1069 OO.ui.TabPanelLayout.prototype.setTabItem = function ( tabItem ) {
1070         this.tabItem = tabItem || null;
1071         if ( tabItem ) {
1072                 this.setupTabItem();
1073         }
1074         return this;
1075 };
1076
1077 /**
1078  * Set up the tab item.
1079  *
1080  * Use this method to customize the tab item (e.g., to add a label or tab level). To set or unset
1081  * the tab item itself (with a {@link OO.ui.TabOptionWidget tab option} or `null`), use
1082  * the #setTabItem method instead.
1083  *
1084  * @param {OO.ui.TabOptionWidget} tabItem Tab option widget to set up
1085  * @chainable
1086  */
1087 OO.ui.TabPanelLayout.prototype.setupTabItem = function () {
1088         if ( this.label ) {
1089                 this.tabItem.setLabel( this.label );
1090         }
1091         return this;
1092 };
1093
1094 /**
1095  * Set the tab panel to its 'active' state.
1096  *
1097  * Tab panels become active when they are shown in a index layout that is configured to display only
1098  * one tab panel at a time. Additional CSS is applied to the tab item to reflect the tab panel's
1099  * active state. Outside of the index context, setting the active state on a tab panel does nothing.
1100  *
1101  * @param {boolean} active Tab panel is active
1102  * @fires active
1103  */
1104 OO.ui.TabPanelLayout.prototype.setActive = function ( active ) {
1105         active = !!active;
1106
1107         if ( active !== this.active ) {
1108                 this.active = active;
1109                 this.$element.toggleClass( 'oo-ui-tabPanelLayout-active', this.active );
1110                 this.emit( 'active', this.active );
1111         }
1112 };
1113
1114 /**
1115  * PageLayouts are used within {@link OO.ui.BookletLayout booklet layouts} to create pages that users can select and display
1116  * from the booklet's optional {@link OO.ui.OutlineSelectWidget outline} navigation. Pages are usually not instantiated directly,
1117  * rather extended to include the required content and functionality.
1118  *
1119  * Each page must have a unique symbolic name, which is passed to the constructor. In addition, the page's outline
1120  * item is customized (with a label, outline level, etc.) using the #setupOutlineItem method. See
1121  * {@link OO.ui.BookletLayout BookletLayout} for an example.
1122  *
1123  * @class
1124  * @extends OO.ui.PanelLayout
1125  *
1126  * @constructor
1127  * @param {string} name Unique symbolic name of page
1128  * @param {Object} [config] Configuration options
1129  */
1130 OO.ui.PageLayout = function OoUiPageLayout( name, config ) {
1131         // Allow passing positional parameters inside the config object
1132         if ( OO.isPlainObject( name ) && config === undefined ) {
1133                 config = name;
1134                 name = config.name;
1135         }
1136
1137         // Configuration initialization
1138         config = $.extend( { scrollable: true }, config );
1139
1140         // Parent constructor
1141         OO.ui.PageLayout.parent.call( this, config );
1142
1143         // Properties
1144         this.name = name;
1145         this.outlineItem = null;
1146         this.active = false;
1147
1148         // Initialization
1149         this.$element.addClass( 'oo-ui-pageLayout' );
1150 };
1151
1152 /* Setup */
1153
1154 OO.inheritClass( OO.ui.PageLayout, OO.ui.PanelLayout );
1155
1156 /* Events */
1157
1158 /**
1159  * An 'active' event is emitted when the page becomes active. Pages become active when they are
1160  * shown in a booklet layout that is configured to display only one page at a time.
1161  *
1162  * @event active
1163  * @param {boolean} active Page is active
1164  */
1165
1166 /* Methods */
1167
1168 /**
1169  * Get the symbolic name of the page.
1170  *
1171  * @return {string} Symbolic name of page
1172  */
1173 OO.ui.PageLayout.prototype.getName = function () {
1174         return this.name;
1175 };
1176
1177 /**
1178  * Check if page is active.
1179  *
1180  * Pages become active when they are shown in a {@link OO.ui.BookletLayout booklet layout} that is configured to display
1181  * only one page at a time. Additional CSS is applied to the page's outline item to reflect the active state.
1182  *
1183  * @return {boolean} Page is active
1184  */
1185 OO.ui.PageLayout.prototype.isActive = function () {
1186         return this.active;
1187 };
1188
1189 /**
1190  * Get outline item.
1191  *
1192  * The outline item allows users to access the page from the booklet's outline
1193  * navigation. The outline item itself can be customized (with a label, level, etc.) using the #setupOutlineItem method.
1194  *
1195  * @return {OO.ui.OutlineOptionWidget|null} Outline option widget
1196  */
1197 OO.ui.PageLayout.prototype.getOutlineItem = function () {
1198         return this.outlineItem;
1199 };
1200
1201 /**
1202  * Set or unset the outline item.
1203  *
1204  * Specify an {@link OO.ui.OutlineOptionWidget outline option} to set it,
1205  * or `null` to clear the outline item. To customize the outline item itself (e.g., to set a label or outline
1206  * level), use #setupOutlineItem instead of this method.
1207  *
1208  * @param {OO.ui.OutlineOptionWidget|null} outlineItem Outline option widget, null to clear
1209  * @chainable
1210  */
1211 OO.ui.PageLayout.prototype.setOutlineItem = function ( outlineItem ) {
1212         this.outlineItem = outlineItem || null;
1213         if ( outlineItem ) {
1214                 this.setupOutlineItem();
1215         }
1216         return this;
1217 };
1218
1219 /**
1220  * Set up the outline item.
1221  *
1222  * Use this method to customize the outline item (e.g., to add a label or outline level). To set or unset
1223  * the outline item itself (with an {@link OO.ui.OutlineOptionWidget outline option} or `null`), use
1224  * the #setOutlineItem method instead.
1225  *
1226  * @param {OO.ui.OutlineOptionWidget} outlineItem Outline option widget to set up
1227  * @chainable
1228  */
1229 OO.ui.PageLayout.prototype.setupOutlineItem = function () {
1230         return this;
1231 };
1232
1233 /**
1234  * Set the page to its 'active' state.
1235  *
1236  * Pages become active when they are shown in a booklet layout that is configured to display only one page at a time. Additional
1237  * CSS is applied to the outline item to reflect the page's active state. Outside of the booklet
1238  * context, setting the active state on a page does nothing.
1239  *
1240  * @param {boolean} active Page is active
1241  * @fires active
1242  */
1243 OO.ui.PageLayout.prototype.setActive = function ( active ) {
1244         active = !!active;
1245
1246         if ( active !== this.active ) {
1247                 this.active = active;
1248                 this.$element.toggleClass( 'oo-ui-pageLayout-active', active );
1249                 this.emit( 'active', this.active );
1250         }
1251 };
1252
1253 /**
1254  * StackLayouts contain a series of {@link OO.ui.PanelLayout panel layouts}. By default, only one panel is displayed
1255  * at a time, though the stack layout can also be configured to show all contained panels, one after another,
1256  * by setting the #continuous option to 'true'.
1257  *
1258  *     @example
1259  *     // A stack layout with two panels, configured to be displayed continously
1260  *     var myStack = new OO.ui.StackLayout( {
1261  *         items: [
1262  *             new OO.ui.PanelLayout( {
1263  *                 $content: $( '<p>Panel One</p>' ),
1264  *                 padded: true,
1265  *                 framed: true
1266  *             } ),
1267  *             new OO.ui.PanelLayout( {
1268  *                 $content: $( '<p>Panel Two</p>' ),
1269  *                 padded: true,
1270  *                 framed: true
1271  *             } )
1272  *         ],
1273  *         continuous: true
1274  *     } );
1275  *     $( 'body' ).append( myStack.$element );
1276  *
1277  * @class
1278  * @extends OO.ui.PanelLayout
1279  * @mixins OO.ui.mixin.GroupElement
1280  *
1281  * @constructor
1282  * @param {Object} [config] Configuration options
1283  * @cfg {boolean} [continuous=false] Show all panels, one after another. By default, only one panel is displayed at a time.
1284  * @cfg {OO.ui.Layout[]} [items] Panel layouts to add to the stack layout.
1285  */
1286 OO.ui.StackLayout = function OoUiStackLayout( config ) {
1287         // Configuration initialization
1288         config = $.extend( { scrollable: true }, config );
1289
1290         // Parent constructor
1291         OO.ui.StackLayout.parent.call( this, config );
1292
1293         // Mixin constructors
1294         OO.ui.mixin.GroupElement.call( this, $.extend( {}, config, { $group: this.$element } ) );
1295
1296         // Properties
1297         this.currentItem = null;
1298         this.continuous = !!config.continuous;
1299
1300         // Initialization
1301         this.$element.addClass( 'oo-ui-stackLayout' );
1302         if ( this.continuous ) {
1303                 this.$element.addClass( 'oo-ui-stackLayout-continuous' );
1304                 this.$element.on( 'scroll', OO.ui.debounce( this.onScroll.bind( this ), 250 ) );
1305         }
1306         if ( Array.isArray( config.items ) ) {
1307                 this.addItems( config.items );
1308         }
1309 };
1310
1311 /* Setup */
1312
1313 OO.inheritClass( OO.ui.StackLayout, OO.ui.PanelLayout );
1314 OO.mixinClass( OO.ui.StackLayout, OO.ui.mixin.GroupElement );
1315
1316 /* Events */
1317
1318 /**
1319  * A 'set' event is emitted when panels are {@link #addItems added}, {@link #removeItems removed},
1320  * {@link #clearItems cleared} or {@link #setItem displayed}.
1321  *
1322  * @event set
1323  * @param {OO.ui.Layout|null} item Current panel or `null` if no panel is shown
1324  */
1325
1326 /**
1327  * When used in continuous mode, this event is emitted when the user scrolls down
1328  * far enough such that currentItem is no longer visible.
1329  *
1330  * @event visibleItemChange
1331  * @param {OO.ui.PanelLayout} panel The next visible item in the layout
1332  */
1333
1334 /* Methods */
1335
1336 /**
1337  * Handle scroll events from the layout element
1338  *
1339  * @param {jQuery.Event} e
1340  * @fires visibleItemChange
1341  */
1342 OO.ui.StackLayout.prototype.onScroll = function () {
1343         var currentRect,
1344                 len = this.items.length,
1345                 currentIndex = this.items.indexOf( this.currentItem ),
1346                 newIndex = currentIndex,
1347                 containerRect = this.$element[ 0 ].getBoundingClientRect();
1348
1349         if ( !containerRect || ( !containerRect.top && !containerRect.bottom ) ) {
1350                 // Can't get bounding rect, possibly not attached.
1351                 return;
1352         }
1353
1354         function getRect( item ) {
1355                 return item.$element[ 0 ].getBoundingClientRect();
1356         }
1357
1358         function isVisible( item ) {
1359                 var rect = getRect( item );
1360                 return rect.bottom > containerRect.top && rect.top < containerRect.bottom;
1361         }
1362
1363         currentRect = getRect( this.currentItem );
1364
1365         if ( currentRect.bottom < containerRect.top ) {
1366                 // Scrolled down past current item
1367                 while ( ++newIndex < len ) {
1368                         if ( isVisible( this.items[ newIndex ] ) ) {
1369                                 break;
1370                         }
1371                 }
1372         } else if ( currentRect.top > containerRect.bottom ) {
1373                 // Scrolled up past current item
1374                 while ( --newIndex >= 0 ) {
1375                         if ( isVisible( this.items[ newIndex ] ) ) {
1376                                 break;
1377                         }
1378                 }
1379         }
1380
1381         if ( newIndex !== currentIndex ) {
1382                 this.emit( 'visibleItemChange', this.items[ newIndex ] );
1383         }
1384 };
1385
1386 /**
1387  * Get the current panel.
1388  *
1389  * @return {OO.ui.Layout|null}
1390  */
1391 OO.ui.StackLayout.prototype.getCurrentItem = function () {
1392         return this.currentItem;
1393 };
1394
1395 /**
1396  * Unset the current item.
1397  *
1398  * @private
1399  * @param {OO.ui.StackLayout} layout
1400  * @fires set
1401  */
1402 OO.ui.StackLayout.prototype.unsetCurrentItem = function () {
1403         var prevItem = this.currentItem;
1404         if ( prevItem === null ) {
1405                 return;
1406         }
1407
1408         this.currentItem = null;
1409         this.emit( 'set', null );
1410 };
1411
1412 /**
1413  * Add panel layouts to the stack layout.
1414  *
1415  * Panels will be added to the end of the stack layout array unless the optional index parameter specifies a different
1416  * insertion point. Adding a panel that is already in the stack will move it to the end of the array or the point specified
1417  * by the index.
1418  *
1419  * @param {OO.ui.Layout[]} items Panels to add
1420  * @param {number} [index] Index of the insertion point
1421  * @chainable
1422  */
1423 OO.ui.StackLayout.prototype.addItems = function ( items, index ) {
1424         // Update the visibility
1425         this.updateHiddenState( items, this.currentItem );
1426
1427         // Mixin method
1428         OO.ui.mixin.GroupElement.prototype.addItems.call( this, items, index );
1429
1430         if ( !this.currentItem && items.length ) {
1431                 this.setItem( items[ 0 ] );
1432         }
1433
1434         return this;
1435 };
1436
1437 /**
1438  * Remove the specified panels from the stack layout.
1439  *
1440  * Removed panels are detached from the DOM, not removed, so that they may be reused. To remove all panels,
1441  * you may wish to use the #clearItems method instead.
1442  *
1443  * @param {OO.ui.Layout[]} items Panels to remove
1444  * @chainable
1445  * @fires set
1446  */
1447 OO.ui.StackLayout.prototype.removeItems = function ( items ) {
1448         // Mixin method
1449         OO.ui.mixin.GroupElement.prototype.removeItems.call( this, items );
1450
1451         if ( items.indexOf( this.currentItem ) !== -1 ) {
1452                 if ( this.items.length ) {
1453                         this.setItem( this.items[ 0 ] );
1454                 } else {
1455                         this.unsetCurrentItem();
1456                 }
1457         }
1458
1459         return this;
1460 };
1461
1462 /**
1463  * Clear all panels from the stack layout.
1464  *
1465  * Cleared panels are detached from the DOM, not removed, so that they may be reused. To remove only
1466  * a subset of panels, use the #removeItems method.
1467  *
1468  * @chainable
1469  * @fires set
1470  */
1471 OO.ui.StackLayout.prototype.clearItems = function () {
1472         this.unsetCurrentItem();
1473         OO.ui.mixin.GroupElement.prototype.clearItems.call( this );
1474
1475         return this;
1476 };
1477
1478 /**
1479  * Show the specified panel.
1480  *
1481  * If another panel is currently displayed, it will be hidden.
1482  *
1483  * @param {OO.ui.Layout} item Panel to show
1484  * @chainable
1485  * @fires set
1486  */
1487 OO.ui.StackLayout.prototype.setItem = function ( item ) {
1488         if ( item !== this.currentItem ) {
1489                 this.updateHiddenState( this.items, item );
1490
1491                 if ( this.items.indexOf( item ) !== -1 ) {
1492                         this.currentItem = item;
1493                         this.emit( 'set', item );
1494                 } else {
1495                         this.unsetCurrentItem();
1496                 }
1497         }
1498
1499         return this;
1500 };
1501
1502 /**
1503  * Update the visibility of all items in case of non-continuous view.
1504  *
1505  * Ensure all items are hidden except for the selected one.
1506  * This method does nothing when the stack is continuous.
1507  *
1508  * @private
1509  * @param {OO.ui.Layout[]} items Item list iterate over
1510  * @param {OO.ui.Layout} [selectedItem] Selected item to show
1511  */
1512 OO.ui.StackLayout.prototype.updateHiddenState = function ( items, selectedItem ) {
1513         var i, len;
1514
1515         if ( !this.continuous ) {
1516                 for ( i = 0, len = items.length; i < len; i++ ) {
1517                         if ( !selectedItem || selectedItem !== items[ i ] ) {
1518                                 items[ i ].$element.addClass( 'oo-ui-element-hidden' );
1519                                 items[ i ].$element.attr( 'aria-hidden', 'true' );
1520                         }
1521                 }
1522                 if ( selectedItem ) {
1523                         selectedItem.$element.removeClass( 'oo-ui-element-hidden' );
1524                         selectedItem.$element.removeAttr( 'aria-hidden' );
1525                 }
1526         }
1527 };
1528
1529 /**
1530  * MenuLayouts combine a menu and a content {@link OO.ui.PanelLayout panel}. The menu is positioned relative to the content (after, before, top, or bottom)
1531  * and its size is customized with the #menuSize config. The content area will fill all remaining space.
1532  *
1533  *     @example
1534  *     var menuLayout = new OO.ui.MenuLayout( {
1535  *         position: 'top'
1536  *     } ),
1537  *         menuPanel = new OO.ui.PanelLayout( { padded: true, expanded: true, scrollable: true } ),
1538  *         contentPanel = new OO.ui.PanelLayout( { padded: true, expanded: true, scrollable: true } ),
1539  *         select = new OO.ui.SelectWidget( {
1540  *             items: [
1541  *                 new OO.ui.OptionWidget( {
1542  *                     data: 'before',
1543  *                     label: 'Before',
1544  *                 } ),
1545  *                 new OO.ui.OptionWidget( {
1546  *                     data: 'after',
1547  *                     label: 'After',
1548  *                 } ),
1549  *                 new OO.ui.OptionWidget( {
1550  *                     data: 'top',
1551  *                     label: 'Top',
1552  *                 } ),
1553  *                 new OO.ui.OptionWidget( {
1554  *                     data: 'bottom',
1555  *                     label: 'Bottom',
1556  *                 } )
1557  *              ]
1558  *         } ).on( 'select', function ( item ) {
1559  *            menuLayout.setMenuPosition( item.getData() );
1560  *         } );
1561  *
1562  *     menuLayout.$menu.append(
1563  *         menuPanel.$element.append( '<b>Menu panel</b>', select.$element )
1564  *     );
1565  *     menuLayout.$content.append(
1566  *         contentPanel.$element.append( '<b>Content panel</b>', '<p>Note that the menu is positioned relative to the content panel: top, bottom, after, before.</p>')
1567  *     );
1568  *     $( 'body' ).append( menuLayout.$element );
1569  *
1570  * If menu size needs to be overridden, it can be accomplished using CSS similar to the snippet
1571  * below. MenuLayout's CSS will override the appropriate values with 'auto' or '0' to display the
1572  * menu correctly. If `menuPosition` is known beforehand, CSS rules corresponding to other positions
1573  * may be omitted.
1574  *
1575  *     .oo-ui-menuLayout-menu {
1576  *         height: 200px;
1577  *         width: 200px;
1578  *     }
1579  *     .oo-ui-menuLayout-content {
1580  *         top: 200px;
1581  *         left: 200px;
1582  *         right: 200px;
1583  *         bottom: 200px;
1584  *     }
1585  *
1586  * @class
1587  * @extends OO.ui.Layout
1588  *
1589  * @constructor
1590  * @param {Object} [config] Configuration options
1591  * @cfg {boolean} [expanded=true] Expand the layout to fill the entire parent element.
1592  * @cfg {boolean} [showMenu=true] Show menu
1593  * @cfg {string} [menuPosition='before'] Position of menu: `top`, `after`, `bottom` or `before`
1594  */
1595 OO.ui.MenuLayout = function OoUiMenuLayout( config ) {
1596         // Configuration initialization
1597         config = $.extend( {
1598                 expanded: true,
1599                 showMenu: true,
1600                 menuPosition: 'before'
1601         }, config );
1602
1603         // Parent constructor
1604         OO.ui.MenuLayout.parent.call( this, config );
1605
1606         this.expanded = !!config.expanded;
1607         /**
1608          * Menu DOM node
1609          *
1610          * @property {jQuery}
1611          */
1612         this.$menu = $( '<div>' );
1613         /**
1614          * Content DOM node
1615          *
1616          * @property {jQuery}
1617          */
1618         this.$content = $( '<div>' );
1619
1620         // Initialization
1621         this.$menu
1622                 .addClass( 'oo-ui-menuLayout-menu' );
1623         this.$content.addClass( 'oo-ui-menuLayout-content' );
1624         this.$element
1625                 .addClass( 'oo-ui-menuLayout' );
1626         if ( config.expanded ) {
1627                 this.$element.addClass( 'oo-ui-menuLayout-expanded' );
1628         } else {
1629                 this.$element.addClass( 'oo-ui-menuLayout-static' );
1630         }
1631         this.setMenuPosition( config.menuPosition );
1632         this.toggleMenu( config.showMenu );
1633 };
1634
1635 /* Setup */
1636
1637 OO.inheritClass( OO.ui.MenuLayout, OO.ui.Layout );
1638
1639 /* Methods */
1640
1641 /**
1642  * Toggle menu.
1643  *
1644  * @param {boolean} showMenu Show menu, omit to toggle
1645  * @chainable
1646  */
1647 OO.ui.MenuLayout.prototype.toggleMenu = function ( showMenu ) {
1648         showMenu = showMenu === undefined ? !this.showMenu : !!showMenu;
1649
1650         if ( this.showMenu !== showMenu ) {
1651                 this.showMenu = showMenu;
1652                 this.$element
1653                         .toggleClass( 'oo-ui-menuLayout-showMenu', this.showMenu )
1654                         .toggleClass( 'oo-ui-menuLayout-hideMenu', !this.showMenu );
1655                 this.$menu.attr( 'aria-hidden', this.showMenu ? 'false' : 'true' );
1656         }
1657
1658         return this;
1659 };
1660
1661 /**
1662  * Check if menu is visible
1663  *
1664  * @return {boolean} Menu is visible
1665  */
1666 OO.ui.MenuLayout.prototype.isMenuVisible = function () {
1667         return this.showMenu;
1668 };
1669
1670 /**
1671  * Set menu position.
1672  *
1673  * @param {string} position Position of menu, either `top`, `after`, `bottom` or `before`
1674  * @throws {Error} If position value is not supported
1675  * @chainable
1676  */
1677 OO.ui.MenuLayout.prototype.setMenuPosition = function ( position ) {
1678         this.$element.removeClass( 'oo-ui-menuLayout-' + this.menuPosition );
1679         this.menuPosition = position;
1680         if ( this.menuPosition === 'top' || this.menuPosition === 'before' ) {
1681                 this.$element.append( this.$menu, this.$content );
1682         } else {
1683                 this.$element.append( this.$content, this.$menu );
1684         }
1685         this.$element.addClass( 'oo-ui-menuLayout-' + position );
1686
1687         return this;
1688 };
1689
1690 /**
1691  * Get menu position.
1692  *
1693  * @return {string} Menu position
1694  */
1695 OO.ui.MenuLayout.prototype.getMenuPosition = function () {
1696         return this.menuPosition;
1697 };
1698
1699 /**
1700  * BookletLayouts contain {@link OO.ui.PageLayout page layouts} as well as
1701  * an {@link OO.ui.OutlineSelectWidget outline} that allows users to easily navigate
1702  * through the pages and select which one to display. By default, only one page is
1703  * displayed at a time and the outline is hidden. When a user navigates to a new page,
1704  * the booklet layout automatically focuses on the first focusable element, unless the
1705  * default setting is changed. Optionally, booklets can be configured to show
1706  * {@link OO.ui.OutlineControlsWidget controls} for adding, moving, and removing items.
1707  *
1708  *     @example
1709  *     // Example of a BookletLayout that contains two PageLayouts.
1710  *
1711  *     function PageOneLayout( name, config ) {
1712  *         PageOneLayout.parent.call( this, name, config );
1713  *         this.$element.append( '<p>First page</p><p>(This booklet has an outline, displayed on the left)</p>' );
1714  *     }
1715  *     OO.inheritClass( PageOneLayout, OO.ui.PageLayout );
1716  *     PageOneLayout.prototype.setupOutlineItem = function () {
1717  *         this.outlineItem.setLabel( 'Page One' );
1718  *     };
1719  *
1720  *     function PageTwoLayout( name, config ) {
1721  *         PageTwoLayout.parent.call( this, name, config );
1722  *         this.$element.append( '<p>Second page</p>' );
1723  *     }
1724  *     OO.inheritClass( PageTwoLayout, OO.ui.PageLayout );
1725  *     PageTwoLayout.prototype.setupOutlineItem = function () {
1726  *         this.outlineItem.setLabel( 'Page Two' );
1727  *     };
1728  *
1729  *     var page1 = new PageOneLayout( 'one' ),
1730  *         page2 = new PageTwoLayout( 'two' );
1731  *
1732  *     var booklet = new OO.ui.BookletLayout( {
1733  *         outlined: true
1734  *     } );
1735  *
1736  *     booklet.addPages ( [ page1, page2 ] );
1737  *     $( 'body' ).append( booklet.$element );
1738  *
1739  * @class
1740  * @extends OO.ui.MenuLayout
1741  *
1742  * @constructor
1743  * @param {Object} [config] Configuration options
1744  * @cfg {boolean} [continuous=false] Show all pages, one after another
1745  * @cfg {boolean} [autoFocus=true] Focus on the first focusable element when a new page is displayed. Disabled on mobile.
1746  * @cfg {boolean} [outlined=false] Show the outline. The outline is used to navigate through the pages of the booklet.
1747  * @cfg {boolean} [editable=false] Show controls for adding, removing and reordering pages
1748  */
1749 OO.ui.BookletLayout = function OoUiBookletLayout( config ) {
1750         // Configuration initialization
1751         config = config || {};
1752
1753         // Parent constructor
1754         OO.ui.BookletLayout.parent.call( this, config );
1755
1756         // Properties
1757         this.currentPageName = null;
1758         this.pages = {};
1759         this.ignoreFocus = false;
1760         this.stackLayout = new OO.ui.StackLayout( {
1761                 continuous: !!config.continuous,
1762                 expanded: this.expanded
1763         } );
1764         this.$content.append( this.stackLayout.$element );
1765         this.autoFocus = config.autoFocus === undefined || !!config.autoFocus;
1766         this.outlineVisible = false;
1767         this.outlined = !!config.outlined;
1768         if ( this.outlined ) {
1769                 this.editable = !!config.editable;
1770                 this.outlineControlsWidget = null;
1771                 this.outlineSelectWidget = new OO.ui.OutlineSelectWidget();
1772                 this.outlinePanel = new OO.ui.PanelLayout( {
1773                         expanded: this.expanded,
1774                         scrollable: true
1775                 } );
1776                 this.$menu.append( this.outlinePanel.$element );
1777                 this.outlineVisible = true;
1778                 if ( this.editable ) {
1779                         this.outlineControlsWidget = new OO.ui.OutlineControlsWidget(
1780                                 this.outlineSelectWidget
1781                         );
1782                 }
1783         }
1784         this.toggleMenu( this.outlined );
1785
1786         // Events
1787         this.stackLayout.connect( this, { set: 'onStackLayoutSet' } );
1788         if ( this.outlined ) {
1789                 this.outlineSelectWidget.connect( this, { select: 'onOutlineSelectWidgetSelect' } );
1790                 this.scrolling = false;
1791                 this.stackLayout.connect( this, { visibleItemChange: 'onStackLayoutVisibleItemChange' } );
1792         }
1793         if ( this.autoFocus ) {
1794                 // Event 'focus' does not bubble, but 'focusin' does
1795                 this.stackLayout.$element.on( 'focusin', this.onStackLayoutFocus.bind( this ) );
1796         }
1797
1798         // Initialization
1799         this.$element.addClass( 'oo-ui-bookletLayout' );
1800         this.stackLayout.$element.addClass( 'oo-ui-bookletLayout-stackLayout' );
1801         if ( this.outlined ) {
1802                 this.outlinePanel.$element
1803                         .addClass( 'oo-ui-bookletLayout-outlinePanel' )
1804                         .append( this.outlineSelectWidget.$element );
1805                 if ( this.editable ) {
1806                         this.outlinePanel.$element
1807                                 .addClass( 'oo-ui-bookletLayout-outlinePanel-editable' )
1808                                 .append( this.outlineControlsWidget.$element );
1809                 }
1810         }
1811 };
1812
1813 /* Setup */
1814
1815 OO.inheritClass( OO.ui.BookletLayout, OO.ui.MenuLayout );
1816
1817 /* Events */
1818
1819 /**
1820  * A 'set' event is emitted when a page is {@link #setPage set} to be displayed by the booklet layout.
1821  * @event set
1822  * @param {OO.ui.PageLayout} page Current page
1823  */
1824
1825 /**
1826  * An 'add' event is emitted when pages are {@link #addPages added} to the booklet layout.
1827  *
1828  * @event add
1829  * @param {OO.ui.PageLayout[]} page Added pages
1830  * @param {number} index Index pages were added at
1831  */
1832
1833 /**
1834  * A 'remove' event is emitted when pages are {@link #clearPages cleared} or
1835  * {@link #removePages removed} from the booklet.
1836  *
1837  * @event remove
1838  * @param {OO.ui.PageLayout[]} pages Removed pages
1839  */
1840
1841 /* Methods */
1842
1843 /**
1844  * Handle stack layout focus.
1845  *
1846  * @private
1847  * @param {jQuery.Event} e Focusin event
1848  */
1849 OO.ui.BookletLayout.prototype.onStackLayoutFocus = function ( e ) {
1850         var name, $target;
1851
1852         // Find the page that an element was focused within
1853         $target = $( e.target ).closest( '.oo-ui-pageLayout' );
1854         for ( name in this.pages ) {
1855                 // Check for page match, exclude current page to find only page changes
1856                 if ( this.pages[ name ].$element[ 0 ] === $target[ 0 ] && name !== this.currentPageName ) {
1857                         this.setPage( name );
1858                         break;
1859                 }
1860         }
1861 };
1862
1863 /**
1864  * Handle visibleItemChange events from the stackLayout
1865  *
1866  * The next visible page is set as the current page by selecting it
1867  * in the outline
1868  *
1869  * @param {OO.ui.PageLayout} page The next visible page in the layout
1870  */
1871 OO.ui.BookletLayout.prototype.onStackLayoutVisibleItemChange = function ( page ) {
1872         // Set a flag to so that the resulting call to #onStackLayoutSet doesn't
1873         // try and scroll the item into view again.
1874         this.scrolling = true;
1875         this.outlineSelectWidget.selectItemByData( page.getName() );
1876         this.scrolling = false;
1877 };
1878
1879 /**
1880  * Handle stack layout set events.
1881  *
1882  * @private
1883  * @param {OO.ui.PanelLayout|null} page The page panel that is now the current panel
1884  */
1885 OO.ui.BookletLayout.prototype.onStackLayoutSet = function ( page ) {
1886         var promise, layout = this;
1887         // If everything is unselected, do nothing
1888         if ( !page ) {
1889                 return;
1890         }
1891         // For continuous BookletLayouts, scroll the selected page into view first
1892         if ( this.stackLayout.continuous && !this.scrolling ) {
1893                 promise = page.scrollElementIntoView();
1894         } else {
1895                 promise = $.Deferred().resolve();
1896         }
1897         // Focus the first element on the newly selected panel.
1898         // Don't focus if the page was set by scrolling.
1899         if ( this.autoFocus && !OO.ui.isMobile() && !this.scrolling ) {
1900                 promise.done( function () {
1901                         layout.focus();
1902                 } );
1903         }
1904 };
1905
1906 /**
1907  * Focus the first input in the current page.
1908  *
1909  * If no page is selected, the first selectable page will be selected.
1910  * If the focus is already in an element on the current page, nothing will happen.
1911  *
1912  * @param {number} [itemIndex] A specific item to focus on
1913  */
1914 OO.ui.BookletLayout.prototype.focus = function ( itemIndex ) {
1915         var page,
1916                 items = this.stackLayout.getItems();
1917
1918         if ( itemIndex !== undefined && items[ itemIndex ] ) {
1919                 page = items[ itemIndex ];
1920         } else {
1921                 page = this.stackLayout.getCurrentItem();
1922         }
1923
1924         if ( !page && this.outlined ) {
1925                 this.selectFirstSelectablePage();
1926                 page = this.stackLayout.getCurrentItem();
1927         }
1928         if ( !page ) {
1929                 return;
1930         }
1931         // Only change the focus if is not already in the current page
1932         if ( !OO.ui.contains( page.$element[ 0 ], this.getElementDocument().activeElement, true ) ) {
1933                 page.focus();
1934         }
1935 };
1936
1937 /**
1938  * Find the first focusable input in the booklet layout and focus
1939  * on it.
1940  */
1941 OO.ui.BookletLayout.prototype.focusFirstFocusable = function () {
1942         OO.ui.findFocusable( this.stackLayout.$element ).focus();
1943 };
1944
1945 /**
1946  * Handle outline widget select events.
1947  *
1948  * @private
1949  * @param {OO.ui.OptionWidget|null} item Selected item
1950  */
1951 OO.ui.BookletLayout.prototype.onOutlineSelectWidgetSelect = function ( item ) {
1952         if ( item ) {
1953                 this.setPage( item.getData() );
1954         }
1955 };
1956
1957 /**
1958  * Check if booklet has an outline.
1959  *
1960  * @return {boolean} Booklet has an outline
1961  */
1962 OO.ui.BookletLayout.prototype.isOutlined = function () {
1963         return this.outlined;
1964 };
1965
1966 /**
1967  * Check if booklet has editing controls.
1968  *
1969  * @return {boolean} Booklet is editable
1970  */
1971 OO.ui.BookletLayout.prototype.isEditable = function () {
1972         return this.editable;
1973 };
1974
1975 /**
1976  * Check if booklet has a visible outline.
1977  *
1978  * @return {boolean} Outline is visible
1979  */
1980 OO.ui.BookletLayout.prototype.isOutlineVisible = function () {
1981         return this.outlined && this.outlineVisible;
1982 };
1983
1984 /**
1985  * Hide or show the outline.
1986  *
1987  * @param {boolean} [show] Show outline, omit to invert current state
1988  * @chainable
1989  */
1990 OO.ui.BookletLayout.prototype.toggleOutline = function ( show ) {
1991         var booklet = this;
1992
1993         if ( this.outlined ) {
1994                 show = show === undefined ? !this.outlineVisible : !!show;
1995                 this.outlineVisible = show;
1996                 this.toggleMenu( show );
1997                 if ( show && this.editable ) {
1998                         // HACK: Kill dumb scrollbars when the sidebar stops animating, see T161798. Only necessary when
1999                         // outline controls are present, delay matches transition on `.oo-ui-menuLayout-menu`.
2000                         setTimeout( function () {
2001                                 OO.ui.Element.static.reconsiderScrollbars( booklet.outlinePanel.$element[ 0 ] );
2002                         }, 200 );
2003                 }
2004         }
2005
2006         return this;
2007 };
2008
2009 /**
2010  * Find the page closest to the specified page.
2011  *
2012  * @param {OO.ui.PageLayout} page Page to use as a reference point
2013  * @return {OO.ui.PageLayout|null} Page closest to the specified page
2014  */
2015 OO.ui.BookletLayout.prototype.findClosestPage = function ( page ) {
2016         var next, prev, level,
2017                 pages = this.stackLayout.getItems(),
2018                 index = pages.indexOf( page );
2019
2020         if ( index !== -1 ) {
2021                 next = pages[ index + 1 ];
2022                 prev = pages[ index - 1 ];
2023                 // Prefer adjacent pages at the same level
2024                 if ( this.outlined ) {
2025                         level = this.outlineSelectWidget.findItemFromData( page.getName() ).getLevel();
2026                         if (
2027                                 prev &&
2028                                 level === this.outlineSelectWidget.findItemFromData( prev.getName() ).getLevel()
2029                         ) {
2030                                 return prev;
2031                         }
2032                         if (
2033                                 next &&
2034                                 level === this.outlineSelectWidget.findItemFromData( next.getName() ).getLevel()
2035                         ) {
2036                                 return next;
2037                         }
2038                 }
2039         }
2040         return prev || next || null;
2041 };
2042
2043 /**
2044  * Get the outline widget.
2045  *
2046  * If the booklet is not outlined, the method will return `null`.
2047  *
2048  * @return {OO.ui.OutlineSelectWidget|null} Outline widget, or null if the booklet is not outlined
2049  */
2050 OO.ui.BookletLayout.prototype.getOutline = function () {
2051         return this.outlineSelectWidget;
2052 };
2053
2054 /**
2055  * Get the outline controls widget.
2056  *
2057  * If the outline is not editable, the method will return `null`.
2058  *
2059  * @return {OO.ui.OutlineControlsWidget|null} The outline controls widget.
2060  */
2061 OO.ui.BookletLayout.prototype.getOutlineControls = function () {
2062         return this.outlineControlsWidget;
2063 };
2064
2065 /**
2066  * Get a page by its symbolic name.
2067  *
2068  * @param {string} name Symbolic name of page
2069  * @return {OO.ui.PageLayout|undefined} Page, if found
2070  */
2071 OO.ui.BookletLayout.prototype.getPage = function ( name ) {
2072         return this.pages[ name ];
2073 };
2074
2075 /**
2076  * Get the current page.
2077  *
2078  * @return {OO.ui.PageLayout|undefined} Current page, if found
2079  */
2080 OO.ui.BookletLayout.prototype.getCurrentPage = function () {
2081         var name = this.getCurrentPageName();
2082         return name ? this.getPage( name ) : undefined;
2083 };
2084
2085 /**
2086  * Get the symbolic name of the current page.
2087  *
2088  * @return {string|null} Symbolic name of the current page
2089  */
2090 OO.ui.BookletLayout.prototype.getCurrentPageName = function () {
2091         return this.currentPageName;
2092 };
2093
2094 /**
2095  * Add pages to the booklet layout
2096  *
2097  * When pages are added with the same names as existing pages, the existing pages will be
2098  * automatically removed before the new pages are added.
2099  *
2100  * @param {OO.ui.PageLayout[]} pages Pages to add
2101  * @param {number} index Index of the insertion point
2102  * @fires add
2103  * @chainable
2104  */
2105 OO.ui.BookletLayout.prototype.addPages = function ( pages, index ) {
2106         var i, len, name, page, item, currentIndex,
2107                 stackLayoutPages = this.stackLayout.getItems(),
2108                 remove = [],
2109                 items = [];
2110
2111         // Remove pages with same names
2112         for ( i = 0, len = pages.length; i < len; i++ ) {
2113                 page = pages[ i ];
2114                 name = page.getName();
2115
2116                 if ( Object.prototype.hasOwnProperty.call( this.pages, name ) ) {
2117                         // Correct the insertion index
2118                         currentIndex = stackLayoutPages.indexOf( this.pages[ name ] );
2119                         if ( currentIndex !== -1 && currentIndex + 1 < index ) {
2120                                 index--;
2121                         }
2122                         remove.push( this.pages[ name ] );
2123                 }
2124         }
2125         if ( remove.length ) {
2126                 this.removePages( remove );
2127         }
2128
2129         // Add new pages
2130         for ( i = 0, len = pages.length; i < len; i++ ) {
2131                 page = pages[ i ];
2132                 name = page.getName();
2133                 this.pages[ page.getName() ] = page;
2134                 if ( this.outlined ) {
2135                         item = new OO.ui.OutlineOptionWidget( { data: name } );
2136                         page.setOutlineItem( item );
2137                         items.push( item );
2138                 }
2139         }
2140
2141         if ( this.outlined && items.length ) {
2142                 this.outlineSelectWidget.addItems( items, index );
2143                 this.selectFirstSelectablePage();
2144         }
2145         this.stackLayout.addItems( pages, index );
2146         this.emit( 'add', pages, index );
2147
2148         return this;
2149 };
2150
2151 /**
2152  * Remove the specified pages from the booklet layout.
2153  *
2154  * To remove all pages from the booklet, you may wish to use the #clearPages method instead.
2155  *
2156  * @param {OO.ui.PageLayout[]} pages An array of pages to remove
2157  * @fires remove
2158  * @chainable
2159  */
2160 OO.ui.BookletLayout.prototype.removePages = function ( pages ) {
2161         var i, len, name, page,
2162                 items = [];
2163
2164         for ( i = 0, len = pages.length; i < len; i++ ) {
2165                 page = pages[ i ];
2166                 name = page.getName();
2167                 delete this.pages[ name ];
2168                 if ( this.outlined ) {
2169                         items.push( this.outlineSelectWidget.findItemFromData( name ) );
2170                         page.setOutlineItem( null );
2171                 }
2172         }
2173         if ( this.outlined && items.length ) {
2174                 this.outlineSelectWidget.removeItems( items );
2175                 this.selectFirstSelectablePage();
2176         }
2177         this.stackLayout.removeItems( pages );
2178         this.emit( 'remove', pages );
2179
2180         return this;
2181 };
2182
2183 /**
2184  * Clear all pages from the booklet layout.
2185  *
2186  * To remove only a subset of pages from the booklet, use the #removePages method.
2187  *
2188  * @fires remove
2189  * @chainable
2190  */
2191 OO.ui.BookletLayout.prototype.clearPages = function () {
2192         var i, len,
2193                 pages = this.stackLayout.getItems();
2194
2195         this.pages = {};
2196         this.currentPageName = null;
2197         if ( this.outlined ) {
2198                 this.outlineSelectWidget.clearItems();
2199                 for ( i = 0, len = pages.length; i < len; i++ ) {
2200                         pages[ i ].setOutlineItem( null );
2201                 }
2202         }
2203         this.stackLayout.clearItems();
2204
2205         this.emit( 'remove', pages );
2206
2207         return this;
2208 };
2209
2210 /**
2211  * Set the current page by symbolic name.
2212  *
2213  * @fires set
2214  * @param {string} name Symbolic name of page
2215  */
2216 OO.ui.BookletLayout.prototype.setPage = function ( name ) {
2217         var selectedItem,
2218                 $focused,
2219                 page = this.pages[ name ],
2220                 previousPage = this.currentPageName && this.pages[ this.currentPageName ];
2221
2222         if ( name !== this.currentPageName ) {
2223                 if ( this.outlined ) {
2224                         selectedItem = this.outlineSelectWidget.findSelectedItem();
2225                         if ( selectedItem && selectedItem.getData() !== name ) {
2226                                 this.outlineSelectWidget.selectItemByData( name );
2227                         }
2228                 }
2229                 if ( page ) {
2230                         if ( previousPage ) {
2231                                 previousPage.setActive( false );
2232                                 // Blur anything focused if the next page doesn't have anything focusable.
2233                                 // This is not needed if the next page has something focusable (because once it is focused
2234                                 // this blur happens automatically). If the layout is non-continuous, this check is
2235                                 // meaningless because the next page is not visible yet and thus can't hold focus.
2236                                 if (
2237                                         this.autoFocus &&
2238                                         !OO.ui.isMobile() &&
2239                                         this.stackLayout.continuous &&
2240                                         OO.ui.findFocusable( page.$element ).length !== 0
2241                                 ) {
2242                                         $focused = previousPage.$element.find( ':focus' );
2243                                         if ( $focused.length ) {
2244                                                 $focused[ 0 ].blur();
2245                                         }
2246                                 }
2247                         }
2248                         this.currentPageName = name;
2249                         page.setActive( true );
2250                         this.stackLayout.setItem( page );
2251                         if ( !this.stackLayout.continuous && previousPage ) {
2252                                 // This should not be necessary, since any inputs on the previous page should have been
2253                                 // blurred when it was hidden, but browsers are not very consistent about this.
2254                                 $focused = previousPage.$element.find( ':focus' );
2255                                 if ( $focused.length ) {
2256                                         $focused[ 0 ].blur();
2257                                 }
2258                         }
2259                         this.emit( 'set', page );
2260                 }
2261         }
2262 };
2263
2264 /**
2265  * Select the first selectable page.
2266  *
2267  * @chainable
2268  */
2269 OO.ui.BookletLayout.prototype.selectFirstSelectablePage = function () {
2270         if ( !this.outlineSelectWidget.findSelectedItem() ) {
2271                 this.outlineSelectWidget.selectItem( this.outlineSelectWidget.findFirstSelectableItem() );
2272         }
2273
2274         return this;
2275 };
2276
2277 /**
2278  * IndexLayouts contain {@link OO.ui.TabPanelLayout tab panel layouts} as well as
2279  * {@link OO.ui.TabSelectWidget tabs} that allow users to easily navigate through the tab panels and
2280  * select which one to display. By default, only one tab panel is displayed at a time. When a user
2281  * navigates to a new tab panel, the index layout automatically focuses on the first focusable element,
2282  * unless the default setting is changed.
2283  *
2284  * TODO: This class is similar to BookletLayout, we may want to refactor to reduce duplication
2285  *
2286  *     @example
2287  *     // Example of a IndexLayout that contains two TabPanelLayouts.
2288  *
2289  *     function TabPanelOneLayout( name, config ) {
2290  *         TabPanelOneLayout.parent.call( this, name, config );
2291  *         this.$element.append( '<p>First tab panel</p>' );
2292  *     }
2293  *     OO.inheritClass( TabPanelOneLayout, OO.ui.TabPanelLayout );
2294  *     TabPanelOneLayout.prototype.setupTabItem = function () {
2295  *         this.tabItem.setLabel( 'Tab panel one' );
2296  *     };
2297  *
2298  *     var tabPanel1 = new TabPanelOneLayout( 'one' ),
2299  *         tabPanel2 = new OO.ui.TabPanelLayout( 'two', { label: 'Tab panel two' } );
2300  *
2301  *     tabPanel2.$element.append( '<p>Second tab panel</p>' );
2302  *
2303  *     var index = new OO.ui.IndexLayout();
2304  *
2305  *     index.addTabPanels ( [ tabPanel1, tabPanel2 ] );
2306  *     $( 'body' ).append( index.$element );
2307  *
2308  * @class
2309  * @extends OO.ui.MenuLayout
2310  *
2311  * @constructor
2312  * @param {Object} [config] Configuration options
2313  * @cfg {boolean} [continuous=false] Show all tab panels, one after another
2314  * @cfg {boolean} [autoFocus=true] Focus on the first focusable element when a new tab panel is displayed. Disabled on mobile.
2315  */
2316 OO.ui.IndexLayout = function OoUiIndexLayout( config ) {
2317         // Configuration initialization
2318         config = $.extend( {}, config, { menuPosition: 'top' } );
2319
2320         // Parent constructor
2321         OO.ui.IndexLayout.parent.call( this, config );
2322
2323         // Properties
2324         this.currentTabPanelName = null;
2325         this.tabPanels = {};
2326
2327         this.ignoreFocus = false;
2328         this.stackLayout = new OO.ui.StackLayout( {
2329                 continuous: !!config.continuous,
2330                 expanded: this.expanded
2331         } );
2332         this.$content.append( this.stackLayout.$element );
2333         this.autoFocus = config.autoFocus === undefined || !!config.autoFocus;
2334
2335         this.tabSelectWidget = new OO.ui.TabSelectWidget();
2336         this.tabPanel = new OO.ui.PanelLayout( {
2337                 expanded: this.expanded
2338         } );
2339         this.$menu.append( this.tabPanel.$element );
2340
2341         this.toggleMenu( true );
2342
2343         // Events
2344         this.stackLayout.connect( this, { set: 'onStackLayoutSet' } );
2345         this.tabSelectWidget.connect( this, { select: 'onTabSelectWidgetSelect' } );
2346         if ( this.autoFocus ) {
2347                 // Event 'focus' does not bubble, but 'focusin' does
2348                 this.stackLayout.$element.on( 'focusin', this.onStackLayoutFocus.bind( this ) );
2349         }
2350
2351         // Initialization
2352         this.$element.addClass( 'oo-ui-indexLayout' );
2353         this.stackLayout.$element.addClass( 'oo-ui-indexLayout-stackLayout' );
2354         this.tabPanel.$element
2355                 .addClass( 'oo-ui-indexLayout-tabPanel' )
2356                 .append( this.tabSelectWidget.$element );
2357 };
2358
2359 /* Setup */
2360
2361 OO.inheritClass( OO.ui.IndexLayout, OO.ui.MenuLayout );
2362
2363 /* Events */
2364
2365 /**
2366  * A 'set' event is emitted when a tab panel is {@link #setTabPanel set} to be displayed by the index layout.
2367  * @event set
2368  * @param {OO.ui.TabPanelLayout} tabPanel Current tab panel
2369  */
2370
2371 /**
2372  * An 'add' event is emitted when tab panels are {@link #addTabPanels added} to the index layout.
2373  *
2374  * @event add
2375  * @param {OO.ui.TabPanelLayout[]} tabPanel Added tab panels
2376  * @param {number} index Index tab panels were added at
2377  */
2378
2379 /**
2380  * A 'remove' event is emitted when tab panels are {@link #clearTabPanels cleared} or
2381  * {@link #removeTabPanels removed} from the index.
2382  *
2383  * @event remove
2384  * @param {OO.ui.TabPanelLayout[]} tabPanel Removed tab panels
2385  */
2386
2387 /* Methods */
2388
2389 /**
2390  * Handle stack layout focus.
2391  *
2392  * @private
2393  * @param {jQuery.Event} e Focusing event
2394  */
2395 OO.ui.IndexLayout.prototype.onStackLayoutFocus = function ( e ) {
2396         var name, $target;
2397
2398         // Find the tab panel that an element was focused within
2399         $target = $( e.target ).closest( '.oo-ui-tabPanelLayout' );
2400         for ( name in this.tabPanels ) {
2401                 // Check for tab panel match, exclude current tab panel to find only tab panel changes
2402                 if ( this.tabPanels[ name ].$element[ 0 ] === $target[ 0 ] && name !== this.currentTabPanelName ) {
2403                         this.setTabPanel( name );
2404                         break;
2405                 }
2406         }
2407 };
2408
2409 /**
2410  * Handle stack layout set events.
2411  *
2412  * @private
2413  * @param {OO.ui.PanelLayout|null} tabPanel The tab panel that is now the current panel
2414  */
2415 OO.ui.IndexLayout.prototype.onStackLayoutSet = function ( tabPanel ) {
2416         // If everything is unselected, do nothing
2417         if ( !tabPanel ) {
2418                 return;
2419         }
2420         // Focus the first element on the newly selected panel
2421         if ( this.autoFocus && !OO.ui.isMobile() ) {
2422                 this.focus();
2423         }
2424 };
2425
2426 /**
2427  * Focus the first input in the current tab panel.
2428  *
2429  * If no tab panel is selected, the first selectable tab panel will be selected.
2430  * If the focus is already in an element on the current tab panel, nothing will happen.
2431  *
2432  * @param {number} [itemIndex] A specific item to focus on
2433  */
2434 OO.ui.IndexLayout.prototype.focus = function ( itemIndex ) {
2435         var tabPanel,
2436                 items = this.stackLayout.getItems();
2437
2438         if ( itemIndex !== undefined && items[ itemIndex ] ) {
2439                 tabPanel = items[ itemIndex ];
2440         } else {
2441                 tabPanel = this.stackLayout.getCurrentItem();
2442         }
2443
2444         if ( !tabPanel ) {
2445                 this.selectFirstSelectableTabPanel();
2446                 tabPanel = this.stackLayout.getCurrentItem();
2447         }
2448         if ( !tabPanel ) {
2449                 return;
2450         }
2451         // Only change the focus if is not already in the current page
2452         if ( !OO.ui.contains( tabPanel.$element[ 0 ], this.getElementDocument().activeElement, true ) ) {
2453                 tabPanel.focus();
2454         }
2455 };
2456
2457 /**
2458  * Find the first focusable input in the index layout and focus
2459  * on it.
2460  */
2461 OO.ui.IndexLayout.prototype.focusFirstFocusable = function () {
2462         OO.ui.findFocusable( this.stackLayout.$element ).focus();
2463 };
2464
2465 /**
2466  * Handle tab widget select events.
2467  *
2468  * @private
2469  * @param {OO.ui.OptionWidget|null} item Selected item
2470  */
2471 OO.ui.IndexLayout.prototype.onTabSelectWidgetSelect = function ( item ) {
2472         if ( item ) {
2473                 this.setTabPanel( item.getData() );
2474         }
2475 };
2476
2477 /**
2478  * Get the tab panel closest to the specified tab panel.
2479  *
2480  * @param {OO.ui.TabPanelLayout} tabPanel Tab panel to use as a reference point
2481  * @return {OO.ui.TabPanelLayout|null} Tab panel closest to the specified
2482  */
2483 OO.ui.IndexLayout.prototype.getClosestTabPanel = function ( tabPanel ) {
2484         var next, prev, level,
2485                 tabPanels = this.stackLayout.getItems(),
2486                 index = tabPanels.indexOf( tabPanel );
2487
2488         if ( index !== -1 ) {
2489                 next = tabPanels[ index + 1 ];
2490                 prev = tabPanels[ index - 1 ];
2491                 // Prefer adjacent tab panels at the same level
2492                 level = this.tabSelectWidget.findItemFromData( tabPanel.getName() ).getLevel();
2493                 if (
2494                         prev &&
2495                         level === this.tabSelectWidget.findItemFromData( prev.getName() ).getLevel()
2496                 ) {
2497                         return prev;
2498                 }
2499                 if (
2500                         next &&
2501                         level === this.tabSelectWidget.findItemFromData( next.getName() ).getLevel()
2502                 ) {
2503                         return next;
2504                 }
2505         }
2506         return prev || next || null;
2507 };
2508
2509 /**
2510  * Get the tabs widget.
2511  *
2512  * @return {OO.ui.TabSelectWidget} Tabs widget
2513  */
2514 OO.ui.IndexLayout.prototype.getTabs = function () {
2515         return this.tabSelectWidget;
2516 };
2517
2518 /**
2519  * Get a tab panel by its symbolic name.
2520  *
2521  * @param {string} name Symbolic name of tab panel
2522  * @return {OO.ui.TabPanelLayout|undefined} Tab panel, if found
2523  */
2524 OO.ui.IndexLayout.prototype.getTabPanel = function ( name ) {
2525         return this.tabPanels[ name ];
2526 };
2527
2528 /**
2529  * Get the current tab panel.
2530  *
2531  * @return {OO.ui.TabPanelLayout|undefined} Current tab panel, if found
2532  */
2533 OO.ui.IndexLayout.prototype.getCurrentTabPanel = function () {
2534         var name = this.getCurrentTabPanelName();
2535         return name ? this.getTabPanel( name ) : undefined;
2536 };
2537
2538 /**
2539  * Get the symbolic name of the current tab panel.
2540  *
2541  * @return {string|null} Symbolic name of the current tab panel
2542  */
2543 OO.ui.IndexLayout.prototype.getCurrentTabPanelName = function () {
2544         return this.currentTabPanelName;
2545 };
2546
2547 /**
2548  * Add tab panels to the index layout
2549  *
2550  * When tab panels are added with the same names as existing tab panels, the existing tab panels
2551  * will be automatically removed before the new tab panels are added.
2552  *
2553  * @param {OO.ui.TabPanelLayout[]} tabPanels Tab panels to add
2554  * @param {number} index Index of the insertion point
2555  * @fires add
2556  * @chainable
2557  */
2558 OO.ui.IndexLayout.prototype.addTabPanels = function ( tabPanels, index ) {
2559         var i, len, name, tabPanel, item, currentIndex,
2560                 stackLayoutTabPanels = this.stackLayout.getItems(),
2561                 remove = [],
2562                 items = [];
2563
2564         // Remove tab panels with same names
2565         for ( i = 0, len = tabPanels.length; i < len; i++ ) {
2566                 tabPanel = tabPanels[ i ];
2567                 name = tabPanel.getName();
2568
2569                 if ( Object.prototype.hasOwnProperty.call( this.tabPanels, name ) ) {
2570                         // Correct the insertion index
2571                         currentIndex = stackLayoutTabPanels.indexOf( this.tabPanels[ name ] );
2572                         if ( currentIndex !== -1 && currentIndex + 1 < index ) {
2573                                 index--;
2574                         }
2575                         remove.push( this.tabPanels[ name ] );
2576                 }
2577         }
2578         if ( remove.length ) {
2579                 this.removeTabPanels( remove );
2580         }
2581
2582         // Add new tab panels
2583         for ( i = 0, len = tabPanels.length; i < len; i++ ) {
2584                 tabPanel = tabPanels[ i ];
2585                 name = tabPanel.getName();
2586                 this.tabPanels[ tabPanel.getName() ] = tabPanel;
2587                 item = new OO.ui.TabOptionWidget( { data: name } );
2588                 tabPanel.setTabItem( item );
2589                 items.push( item );
2590         }
2591
2592         if ( items.length ) {
2593                 this.tabSelectWidget.addItems( items, index );
2594                 this.selectFirstSelectableTabPanel();
2595         }
2596         this.stackLayout.addItems( tabPanels, index );
2597         this.emit( 'add', tabPanels, index );
2598
2599         return this;
2600 };
2601
2602 /**
2603  * Remove the specified tab panels from the index layout.
2604  *
2605  * To remove all tab panels from the index, you may wish to use the #clearTabPanels method instead.
2606  *
2607  * @param {OO.ui.TabPanelLayout[]} tabPanels An array of tab panels to remove
2608  * @fires remove
2609  * @chainable
2610  */
2611 OO.ui.IndexLayout.prototype.removeTabPanels = function ( tabPanels ) {
2612         var i, len, name, tabPanel,
2613                 items = [];
2614
2615         for ( i = 0, len = tabPanels.length; i < len; i++ ) {
2616                 tabPanel = tabPanels[ i ];
2617                 name = tabPanel.getName();
2618                 delete this.tabPanels[ name ];
2619                 items.push( this.tabSelectWidget.findItemFromData( name ) );
2620                 tabPanel.setTabItem( null );
2621         }
2622         if ( items.length ) {
2623                 this.tabSelectWidget.removeItems( items );
2624                 this.selectFirstSelectableTabPanel();
2625         }
2626         this.stackLayout.removeItems( tabPanels );
2627         this.emit( 'remove', tabPanels );
2628
2629         return this;
2630 };
2631
2632 /**
2633  * Clear all tab panels from the index layout.
2634  *
2635  * To remove only a subset of tab panels from the index, use the #removeTabPanels method.
2636  *
2637  * @fires remove
2638  * @chainable
2639  */
2640 OO.ui.IndexLayout.prototype.clearTabPanels = function () {
2641         var i, len,
2642                 tabPanels = this.stackLayout.getItems();
2643
2644         this.tabPanels = {};
2645         this.currentTabPanelName = null;
2646         this.tabSelectWidget.clearItems();
2647         for ( i = 0, len = tabPanels.length; i < len; i++ ) {
2648                 tabPanels[ i ].setTabItem( null );
2649         }
2650         this.stackLayout.clearItems();
2651
2652         this.emit( 'remove', tabPanels );
2653
2654         return this;
2655 };
2656
2657 /**
2658  * Set the current tab panel by symbolic name.
2659  *
2660  * @fires set
2661  * @param {string} name Symbolic name of tab panel
2662  */
2663 OO.ui.IndexLayout.prototype.setTabPanel = function ( name ) {
2664         var selectedItem,
2665                 $focused,
2666                 tabPanel = this.tabPanels[ name ],
2667                 previousTabPanel = this.currentTabPanelName && this.tabPanels[ this.currentTabPanelName ];
2668
2669         if ( name !== this.currentTabPanelName ) {
2670                 selectedItem = this.tabSelectWidget.findSelectedItem();
2671                 if ( selectedItem && selectedItem.getData() !== name ) {
2672                         this.tabSelectWidget.selectItemByData( name );
2673                 }
2674                 if ( tabPanel ) {
2675                         if ( previousTabPanel ) {
2676                                 previousTabPanel.setActive( false );
2677                                 // Blur anything focused if the next tab panel doesn't have anything focusable.
2678                                 // This is not needed if the next tab panel has something focusable (because once it is focused
2679                                 // this blur happens automatically). If the layout is non-continuous, this check is
2680                                 // meaningless because the next tab panel is not visible yet and thus can't hold focus.
2681                                 if (
2682                                         this.autoFocus &&
2683                                         !OO.ui.isMobile() &&
2684                                         this.stackLayout.continuous &&
2685                                         OO.ui.findFocusable( tabPanel.$element ).length !== 0
2686                                 ) {
2687                                         $focused = previousTabPanel.$element.find( ':focus' );
2688                                         if ( $focused.length ) {
2689                                                 $focused[ 0 ].blur();
2690                                         }
2691                                 }
2692                         }
2693                         this.currentTabPanelName = name;
2694                         tabPanel.setActive( true );
2695                         this.stackLayout.setItem( tabPanel );
2696                         if ( !this.stackLayout.continuous && previousTabPanel ) {
2697                                 // This should not be necessary, since any inputs on the previous tab panel should have been
2698                                 // blurred when it was hidden, but browsers are not very consistent about this.
2699                                 $focused = previousTabPanel.$element.find( ':focus' );
2700                                 if ( $focused.length ) {
2701                                         $focused[ 0 ].blur();
2702                                 }
2703                         }
2704                         this.emit( 'set', tabPanel );
2705                 }
2706         }
2707 };
2708
2709 /**
2710  * Select the first selectable tab panel.
2711  *
2712  * @chainable
2713  */
2714 OO.ui.IndexLayout.prototype.selectFirstSelectableTabPanel = function () {
2715         if ( !this.tabSelectWidget.findSelectedItem() ) {
2716                 this.tabSelectWidget.selectItem( this.tabSelectWidget.findFirstSelectableItem() );
2717         }
2718
2719         return this;
2720 };
2721
2722 /**
2723  * ToggleWidget implements basic behavior of widgets with an on/off state.
2724  * Please see OO.ui.ToggleButtonWidget and OO.ui.ToggleSwitchWidget for examples.
2725  *
2726  * @abstract
2727  * @class
2728  * @extends OO.ui.Widget
2729  *
2730  * @constructor
2731  * @param {Object} [config] Configuration options
2732  * @cfg {boolean} [value=false] The toggle’s initial on/off state.
2733  *  By default, the toggle is in the 'off' state.
2734  */
2735 OO.ui.ToggleWidget = function OoUiToggleWidget( config ) {
2736         // Configuration initialization
2737         config = config || {};
2738
2739         // Parent constructor
2740         OO.ui.ToggleWidget.parent.call( this, config );
2741
2742         // Properties
2743         this.value = null;
2744
2745         // Initialization
2746         this.$element.addClass( 'oo-ui-toggleWidget' );
2747         this.setValue( !!config.value );
2748 };
2749
2750 /* Setup */
2751
2752 OO.inheritClass( OO.ui.ToggleWidget, OO.ui.Widget );
2753
2754 /* Events */
2755
2756 /**
2757  * @event change
2758  *
2759  * A change event is emitted when the on/off state of the toggle changes.
2760  *
2761  * @param {boolean} value Value representing the new state of the toggle
2762  */
2763
2764 /* Methods */
2765
2766 /**
2767  * Get the value representing the toggle’s state.
2768  *
2769  * @return {boolean} The on/off state of the toggle
2770  */
2771 OO.ui.ToggleWidget.prototype.getValue = function () {
2772         return this.value;
2773 };
2774
2775 /**
2776  * Set the state of the toggle: `true` for 'on', `false` for 'off'.
2777  *
2778  * @param {boolean} value The state of the toggle
2779  * @fires change
2780  * @chainable
2781  */
2782 OO.ui.ToggleWidget.prototype.setValue = function ( value ) {
2783         value = !!value;
2784         if ( this.value !== value ) {
2785                 this.value = value;
2786                 this.emit( 'change', value );
2787                 this.$element.toggleClass( 'oo-ui-toggleWidget-on', value );
2788                 this.$element.toggleClass( 'oo-ui-toggleWidget-off', !value );
2789         }
2790         return this;
2791 };
2792
2793 /**
2794  * ToggleButtons are buttons that have a state (‘on’ or ‘off’) that is represented by a
2795  * Boolean value. Like other {@link OO.ui.ButtonWidget buttons}, toggle buttons can be
2796  * configured with {@link OO.ui.mixin.IconElement icons}, {@link OO.ui.mixin.IndicatorElement indicators},
2797  * {@link OO.ui.mixin.TitledElement titles}, {@link OO.ui.mixin.FlaggedElement styling flags},
2798  * and {@link OO.ui.mixin.LabelElement labels}. Please see
2799  * the [OOUI documentation][1] on MediaWiki for more information.
2800  *
2801  *     @example
2802  *     // Toggle buttons in the 'off' and 'on' state.
2803  *     var toggleButton1 = new OO.ui.ToggleButtonWidget( {
2804  *         label: 'Toggle Button off'
2805  *     } );
2806  *     var toggleButton2 = new OO.ui.ToggleButtonWidget( {
2807  *         label: 'Toggle Button on',
2808  *         value: true
2809  *     } );
2810  *     // Append the buttons to the DOM.
2811  *     $( 'body' ).append( toggleButton1.$element, toggleButton2.$element );
2812  *
2813  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets/Buttons_and_Switches#Toggle_buttons
2814  *
2815  * @class
2816  * @extends OO.ui.ToggleWidget
2817  * @mixins OO.ui.mixin.ButtonElement
2818  * @mixins OO.ui.mixin.IconElement
2819  * @mixins OO.ui.mixin.IndicatorElement
2820  * @mixins OO.ui.mixin.LabelElement
2821  * @mixins OO.ui.mixin.TitledElement
2822  * @mixins OO.ui.mixin.FlaggedElement
2823  * @mixins OO.ui.mixin.TabIndexedElement
2824  *
2825  * @constructor
2826  * @param {Object} [config] Configuration options
2827  * @cfg {boolean} [value=false] The toggle button’s initial on/off
2828  *  state. By default, the button is in the 'off' state.
2829  */
2830 OO.ui.ToggleButtonWidget = function OoUiToggleButtonWidget( config ) {
2831         // Configuration initialization
2832         config = config || {};
2833
2834         // Parent constructor
2835         OO.ui.ToggleButtonWidget.parent.call( this, config );
2836
2837         // Mixin constructors
2838         OO.ui.mixin.ButtonElement.call( this, $.extend( {}, config, { active: this.active } ) );
2839         OO.ui.mixin.IconElement.call( this, config );
2840         OO.ui.mixin.IndicatorElement.call( this, config );
2841         OO.ui.mixin.LabelElement.call( this, config );
2842         OO.ui.mixin.TitledElement.call( this, $.extend( {}, config, { $titled: this.$button } ) );
2843         OO.ui.mixin.FlaggedElement.call( this, config );
2844         OO.ui.mixin.TabIndexedElement.call( this, $.extend( {}, config, { $tabIndexed: this.$button } ) );
2845
2846         // Events
2847         this.connect( this, { click: 'onAction' } );
2848
2849         // Initialization
2850         this.$button.append( this.$icon, this.$label, this.$indicator );
2851         this.$element
2852                 .addClass( 'oo-ui-toggleButtonWidget' )
2853                 .append( this.$button );
2854 };
2855
2856 /* Setup */
2857
2858 OO.inheritClass( OO.ui.ToggleButtonWidget, OO.ui.ToggleWidget );
2859 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.ButtonElement );
2860 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.IconElement );
2861 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.IndicatorElement );
2862 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.LabelElement );
2863 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.TitledElement );
2864 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.FlaggedElement );
2865 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.TabIndexedElement );
2866
2867 /* Static Properties */
2868
2869 /**
2870  * @static
2871  * @inheritdoc
2872  */
2873 OO.ui.ToggleButtonWidget.static.tagName = 'span';
2874
2875 /* Methods */
2876
2877 /**
2878  * Handle the button action being triggered.
2879  *
2880  * @private
2881  */
2882 OO.ui.ToggleButtonWidget.prototype.onAction = function () {
2883         this.setValue( !this.value );
2884 };
2885
2886 /**
2887  * @inheritdoc
2888  */
2889 OO.ui.ToggleButtonWidget.prototype.setValue = function ( value ) {
2890         value = !!value;
2891         if ( value !== this.value ) {
2892                 // Might be called from parent constructor before ButtonElement constructor
2893                 if ( this.$button ) {
2894                         this.$button.attr( 'aria-pressed', value.toString() );
2895                 }
2896                 this.setActive( value );
2897         }
2898
2899         // Parent method
2900         OO.ui.ToggleButtonWidget.parent.prototype.setValue.call( this, value );
2901
2902         return this;
2903 };
2904
2905 /**
2906  * @inheritdoc
2907  */
2908 OO.ui.ToggleButtonWidget.prototype.setButtonElement = function ( $button ) {
2909         if ( this.$button ) {
2910                 this.$button.removeAttr( 'aria-pressed' );
2911         }
2912         OO.ui.mixin.ButtonElement.prototype.setButtonElement.call( this, $button );
2913         this.$button.attr( 'aria-pressed', this.value.toString() );
2914 };
2915
2916 /**
2917  * ToggleSwitches are switches that slide on and off. Their state is represented by a Boolean
2918  * value (`true` for ‘on’, and `false` otherwise, the default). The ‘off’ state is represented
2919  * visually by a slider in the leftmost position.
2920  *
2921  *     @example
2922  *     // Toggle switches in the 'off' and 'on' position.
2923  *     var toggleSwitch1 = new OO.ui.ToggleSwitchWidget();
2924  *     var toggleSwitch2 = new OO.ui.ToggleSwitchWidget( {
2925  *         value: true
2926  *     } );
2927  *
2928  *     // Create a FieldsetLayout to layout and label switches
2929  *     var fieldset = new OO.ui.FieldsetLayout( {
2930  *        label: 'Toggle switches'
2931  *     } );
2932  *     fieldset.addItems( [
2933  *         new OO.ui.FieldLayout( toggleSwitch1, { label: 'Off', align: 'top' } ),
2934  *         new OO.ui.FieldLayout( toggleSwitch2, { label: 'On', align: 'top' } )
2935  *     ] );
2936  *     $( 'body' ).append( fieldset.$element );
2937  *
2938  * @class
2939  * @extends OO.ui.ToggleWidget
2940  * @mixins OO.ui.mixin.TabIndexedElement
2941  *
2942  * @constructor
2943  * @param {Object} [config] Configuration options
2944  * @cfg {boolean} [value=false] The toggle switch’s initial on/off state.
2945  *  By default, the toggle switch is in the 'off' position.
2946  */
2947 OO.ui.ToggleSwitchWidget = function OoUiToggleSwitchWidget( config ) {
2948         // Parent constructor
2949         OO.ui.ToggleSwitchWidget.parent.call( this, config );
2950
2951         // Mixin constructors
2952         OO.ui.mixin.TabIndexedElement.call( this, config );
2953
2954         // Properties
2955         this.dragging = false;
2956         this.dragStart = null;
2957         this.sliding = false;
2958         this.$glow = $( '<span>' );
2959         this.$grip = $( '<span>' );
2960
2961         // Events
2962         this.$element.on( {
2963                 click: this.onClick.bind( this ),
2964                 keypress: this.onKeyPress.bind( this )
2965         } );
2966
2967         // Initialization
2968         this.$glow.addClass( 'oo-ui-toggleSwitchWidget-glow' );
2969         this.$grip.addClass( 'oo-ui-toggleSwitchWidget-grip' );
2970         this.$element
2971                 .addClass( 'oo-ui-toggleSwitchWidget' )
2972                 .attr( 'role', 'checkbox' )
2973                 .append( this.$glow, this.$grip );
2974 };
2975
2976 /* Setup */
2977
2978 OO.inheritClass( OO.ui.ToggleSwitchWidget, OO.ui.ToggleWidget );
2979 OO.mixinClass( OO.ui.ToggleSwitchWidget, OO.ui.mixin.TabIndexedElement );
2980
2981 /* Methods */
2982
2983 /**
2984  * Handle mouse click events.
2985  *
2986  * @private
2987  * @param {jQuery.Event} e Mouse click event
2988  */
2989 OO.ui.ToggleSwitchWidget.prototype.onClick = function ( e ) {
2990         if ( !this.isDisabled() && e.which === OO.ui.MouseButtons.LEFT ) {
2991                 this.setValue( !this.value );
2992         }
2993         return false;
2994 };
2995
2996 /**
2997  * Handle key press events.
2998  *
2999  * @private
3000  * @param {jQuery.Event} e Key press event
3001  */
3002 OO.ui.ToggleSwitchWidget.prototype.onKeyPress = function ( e ) {
3003         if ( !this.isDisabled() && ( e.which === OO.ui.Keys.SPACE || e.which === OO.ui.Keys.ENTER ) ) {
3004                 this.setValue( !this.value );
3005                 return false;
3006         }
3007 };
3008
3009 /**
3010  * @inheritdoc
3011  */
3012 OO.ui.ToggleSwitchWidget.prototype.setValue = function ( value ) {
3013         OO.ui.ToggleSwitchWidget.parent.prototype.setValue.call( this, value );
3014         this.$element.attr( 'aria-checked', this.value.toString() );
3015         return this;
3016 };
3017
3018 /**
3019  * @inheritdoc
3020  */
3021 OO.ui.ToggleSwitchWidget.prototype.simulateLabelClick = function () {
3022         if ( !this.isDisabled() ) {
3023                 this.setValue( !this.value );
3024         }
3025         this.focus();
3026 };
3027
3028 /**
3029  * OutlineControlsWidget is a set of controls for an {@link OO.ui.OutlineSelectWidget outline select widget}.
3030  * Controls include moving items up and down, removing items, and adding different kinds of items.
3031  *
3032  * **Currently, this class is only used by {@link OO.ui.BookletLayout booklet layouts}.**
3033  *
3034  * @class
3035  * @extends OO.ui.Widget
3036  * @mixins OO.ui.mixin.GroupElement
3037  *
3038  * @constructor
3039  * @param {OO.ui.OutlineSelectWidget} outline Outline to control
3040  * @param {Object} [config] Configuration options
3041  * @cfg {Object} [abilities] List of abilties
3042  * @cfg {boolean} [abilities.move=true] Allow moving movable items
3043  * @cfg {boolean} [abilities.remove=true] Allow removing removable items
3044  */
3045 OO.ui.OutlineControlsWidget = function OoUiOutlineControlsWidget( outline, config ) {
3046         // Allow passing positional parameters inside the config object
3047         if ( OO.isPlainObject( outline ) && config === undefined ) {
3048                 config = outline;
3049                 outline = config.outline;
3050         }
3051
3052         // Configuration initialization
3053         config = config || {};
3054
3055         // Parent constructor
3056         OO.ui.OutlineControlsWidget.parent.call( this, config );
3057
3058         // Mixin constructors
3059         OO.ui.mixin.GroupElement.call( this, config );
3060
3061         // Properties
3062         this.outline = outline;
3063         this.$movers = $( '<div>' );
3064         this.upButton = new OO.ui.ButtonWidget( {
3065                 framed: false,
3066                 icon: 'collapse',
3067                 title: OO.ui.msg( 'ooui-outline-control-move-up' )
3068         } );
3069         this.downButton = new OO.ui.ButtonWidget( {
3070                 framed: false,
3071                 icon: 'expand',
3072                 title: OO.ui.msg( 'ooui-outline-control-move-down' )
3073         } );
3074         this.removeButton = new OO.ui.ButtonWidget( {
3075                 framed: false,
3076                 icon: 'trash',
3077                 title: OO.ui.msg( 'ooui-outline-control-remove' )
3078         } );
3079         this.abilities = { move: true, remove: true };
3080
3081         // Events
3082         outline.connect( this, {
3083                 select: 'onOutlineChange',
3084                 add: 'onOutlineChange',
3085                 remove: 'onOutlineChange'
3086         } );
3087         this.upButton.connect( this, { click: [ 'emit', 'move', -1 ] } );
3088         this.downButton.connect( this, { click: [ 'emit', 'move', 1 ] } );
3089         this.removeButton.connect( this, { click: [ 'emit', 'remove' ] } );
3090
3091         // Initialization
3092         this.$element.addClass( 'oo-ui-outlineControlsWidget' );
3093         this.$group.addClass( 'oo-ui-outlineControlsWidget-items' );
3094         this.$movers
3095                 .addClass( 'oo-ui-outlineControlsWidget-movers' )
3096                 .append( this.removeButton.$element, this.upButton.$element, this.downButton.$element );
3097         this.$element.append( this.$icon, this.$group, this.$movers );
3098         this.setAbilities( config.abilities || {} );
3099 };
3100
3101 /* Setup */
3102
3103 OO.inheritClass( OO.ui.OutlineControlsWidget, OO.ui.Widget );
3104 OO.mixinClass( OO.ui.OutlineControlsWidget, OO.ui.mixin.GroupElement );
3105
3106 /* Events */
3107
3108 /**
3109  * @event move
3110  * @param {number} places Number of places to move
3111  */
3112
3113 /**
3114  * @event remove
3115  */
3116
3117 /* Methods */
3118
3119 /**
3120  * Set abilities.
3121  *
3122  * @param {Object} abilities List of abilties
3123  * @param {boolean} [abilities.move] Allow moving movable items
3124  * @param {boolean} [abilities.remove] Allow removing removable items
3125  */
3126 OO.ui.OutlineControlsWidget.prototype.setAbilities = function ( abilities ) {
3127         var ability;
3128
3129         for ( ability in this.abilities ) {
3130                 if ( abilities[ ability ] !== undefined ) {
3131                         this.abilities[ ability ] = !!abilities[ ability ];
3132                 }
3133         }
3134
3135         this.onOutlineChange();
3136 };
3137
3138 /**
3139  * Handle outline change events.
3140  *
3141  * @private
3142  */
3143 OO.ui.OutlineControlsWidget.prototype.onOutlineChange = function () {
3144         var i, len, firstMovable, lastMovable,
3145                 items = this.outline.getItems(),
3146                 selectedItem = this.outline.findSelectedItem(),
3147                 movable = this.abilities.move && selectedItem && selectedItem.isMovable(),
3148                 removable = this.abilities.remove && selectedItem && selectedItem.isRemovable();
3149
3150         if ( movable ) {
3151                 i = -1;
3152                 len = items.length;
3153                 while ( ++i < len ) {
3154                         if ( items[ i ].isMovable() ) {
3155                                 firstMovable = items[ i ];
3156                                 break;
3157                         }
3158                 }
3159                 i = len;
3160                 while ( i-- ) {
3161                         if ( items[ i ].isMovable() ) {
3162                                 lastMovable = items[ i ];
3163                                 break;
3164                         }
3165                 }
3166         }
3167         this.upButton.setDisabled( !movable || selectedItem === firstMovable );
3168         this.downButton.setDisabled( !movable || selectedItem === lastMovable );
3169         this.removeButton.setDisabled( !removable );
3170 };
3171
3172 /**
3173  * OutlineOptionWidget is an item in an {@link OO.ui.OutlineSelectWidget OutlineSelectWidget}.
3174  *
3175  * Currently, this class is only used by {@link OO.ui.BookletLayout booklet layouts}, which contain
3176  * {@link OO.ui.PageLayout page layouts}. See {@link OO.ui.BookletLayout BookletLayout}
3177  * for an example.
3178  *
3179  * @class
3180  * @extends OO.ui.DecoratedOptionWidget
3181  *
3182  * @constructor
3183  * @param {Object} [config] Configuration options
3184  * @cfg {number} [level] Indentation level
3185  * @cfg {boolean} [movable] Allow modification from {@link OO.ui.OutlineControlsWidget outline controls}.
3186  */
3187 OO.ui.OutlineOptionWidget = function OoUiOutlineOptionWidget( config ) {
3188         // Configuration initialization
3189         config = config || {};
3190
3191         // Parent constructor
3192         OO.ui.OutlineOptionWidget.parent.call( this, config );
3193
3194         // Properties
3195         this.level = 0;
3196         this.movable = !!config.movable;
3197         this.removable = !!config.removable;
3198
3199         // Initialization
3200         this.$element.addClass( 'oo-ui-outlineOptionWidget' );
3201         this.setLevel( config.level );
3202 };
3203
3204 /* Setup */
3205
3206 OO.inheritClass( OO.ui.OutlineOptionWidget, OO.ui.DecoratedOptionWidget );
3207
3208 /* Static Properties */
3209
3210 /**
3211  * @static
3212  * @inheritdoc
3213  */
3214 OO.ui.OutlineOptionWidget.static.highlightable = true;
3215
3216 /**
3217  * @static
3218  * @inheritdoc
3219  */
3220 OO.ui.OutlineOptionWidget.static.scrollIntoViewOnSelect = true;
3221
3222 /**
3223  * @static
3224  * @inheritable
3225  * @property {string}
3226  */
3227 OO.ui.OutlineOptionWidget.static.levelClass = 'oo-ui-outlineOptionWidget-level-';
3228
3229 /**
3230  * @static
3231  * @inheritable
3232  * @property {number}
3233  */
3234 OO.ui.OutlineOptionWidget.static.levels = 3;
3235
3236 /* Methods */
3237
3238 /**
3239  * Check if item is movable.
3240  *
3241  * Movability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
3242  *
3243  * @return {boolean} Item is movable
3244  */
3245 OO.ui.OutlineOptionWidget.prototype.isMovable = function () {
3246         return this.movable;
3247 };
3248
3249 /**
3250  * Check if item is removable.
3251  *
3252  * Removability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
3253  *
3254  * @return {boolean} Item is removable
3255  */
3256 OO.ui.OutlineOptionWidget.prototype.isRemovable = function () {
3257         return this.removable;
3258 };
3259
3260 /**
3261  * Get indentation level.
3262  *
3263  * @return {number} Indentation level
3264  */
3265 OO.ui.OutlineOptionWidget.prototype.getLevel = function () {
3266         return this.level;
3267 };
3268
3269 /**
3270  * @inheritdoc
3271  */
3272 OO.ui.OutlineOptionWidget.prototype.setPressed = function ( state ) {
3273         OO.ui.OutlineOptionWidget.parent.prototype.setPressed.call( this, state );
3274         return this;
3275 };
3276
3277 /**
3278  * Set movability.
3279  *
3280  * Movability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
3281  *
3282  * @param {boolean} movable Item is movable
3283  * @chainable
3284  */
3285 OO.ui.OutlineOptionWidget.prototype.setMovable = function ( movable ) {
3286         this.movable = !!movable;
3287         this.updateThemeClasses();
3288         return this;
3289 };
3290
3291 /**
3292  * Set removability.
3293  *
3294  * Removability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
3295  *
3296  * @param {boolean} removable Item is removable
3297  * @chainable
3298  */
3299 OO.ui.OutlineOptionWidget.prototype.setRemovable = function ( removable ) {
3300         this.removable = !!removable;
3301         this.updateThemeClasses();
3302         return this;
3303 };
3304
3305 /**
3306  * @inheritdoc
3307  */
3308 OO.ui.OutlineOptionWidget.prototype.setSelected = function ( state ) {
3309         OO.ui.OutlineOptionWidget.parent.prototype.setSelected.call( this, state );
3310         return this;
3311 };
3312
3313 /**
3314  * Set indentation level.
3315  *
3316  * @param {number} [level=0] Indentation level, in the range of [0,#maxLevel]
3317  * @chainable
3318  */
3319 OO.ui.OutlineOptionWidget.prototype.setLevel = function ( level ) {
3320         var levels = this.constructor.static.levels,
3321                 levelClass = this.constructor.static.levelClass,
3322                 i = levels;
3323
3324         this.level = level ? Math.max( 0, Math.min( levels - 1, level ) ) : 0;
3325         while ( i-- ) {
3326                 if ( this.level === i ) {
3327                         this.$element.addClass( levelClass + i );
3328                 } else {
3329                         this.$element.removeClass( levelClass + i );
3330                 }
3331         }
3332         this.updateThemeClasses();
3333
3334         return this;
3335 };
3336
3337 /**
3338  * OutlineSelectWidget is a structured list that contains {@link OO.ui.OutlineOptionWidget outline options}
3339  * A set of controls can be provided with an {@link OO.ui.OutlineControlsWidget outline controls} widget.
3340  *
3341  * **Currently, this class is only used by {@link OO.ui.BookletLayout booklet layouts}.**
3342  *
3343  * @class
3344  * @extends OO.ui.SelectWidget
3345  * @mixins OO.ui.mixin.TabIndexedElement
3346  *
3347  * @constructor
3348  * @param {Object} [config] Configuration options
3349  */
3350 OO.ui.OutlineSelectWidget = function OoUiOutlineSelectWidget( config ) {
3351         // Parent constructor
3352         OO.ui.OutlineSelectWidget.parent.call( this, config );
3353
3354         // Mixin constructors
3355         OO.ui.mixin.TabIndexedElement.call( this, config );
3356
3357         // Events
3358         this.$element.on( {
3359                 focus: this.bindKeyDownListener.bind( this ),
3360                 blur: this.unbindKeyDownListener.bind( this )
3361         } );
3362
3363         // Initialization
3364         this.$element.addClass( 'oo-ui-outlineSelectWidget' );
3365 };
3366
3367 /* Setup */
3368
3369 OO.inheritClass( OO.ui.OutlineSelectWidget, OO.ui.SelectWidget );
3370 OO.mixinClass( OO.ui.OutlineSelectWidget, OO.ui.mixin.TabIndexedElement );
3371
3372 /**
3373  * ButtonOptionWidget is a special type of {@link OO.ui.mixin.ButtonElement button element} that
3374  * can be selected and configured with data. The class is
3375  * used with OO.ui.ButtonSelectWidget to create a selection of button options. Please see the
3376  * [OOUI documentation on MediaWiki] [1] for more information.
3377  *
3378  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets/Selects_and_Options#Button_selects_and_options
3379  *
3380  * @class
3381  * @extends OO.ui.OptionWidget
3382  * @mixins OO.ui.mixin.ButtonElement
3383  * @mixins OO.ui.mixin.IconElement
3384  * @mixins OO.ui.mixin.IndicatorElement
3385  * @mixins OO.ui.mixin.TitledElement
3386  *
3387  * @constructor
3388  * @param {Object} [config] Configuration options
3389  */
3390 OO.ui.ButtonOptionWidget = function OoUiButtonOptionWidget( config ) {
3391         // Configuration initialization
3392         config = config || {};
3393
3394         // Parent constructor
3395         OO.ui.ButtonOptionWidget.parent.call( this, config );
3396
3397         // Mixin constructors
3398         OO.ui.mixin.ButtonElement.call( this, config );
3399         OO.ui.mixin.IconElement.call( this, config );
3400         OO.ui.mixin.IndicatorElement.call( this, config );
3401         OO.ui.mixin.TitledElement.call( this, $.extend( {}, config, { $titled: this.$button } ) );
3402
3403         // Initialization
3404         this.$element.addClass( 'oo-ui-buttonOptionWidget' );
3405         this.$button.append( this.$icon, this.$label, this.$indicator );
3406         this.$element.append( this.$button );
3407 };
3408
3409 /* Setup */
3410
3411 OO.inheritClass( OO.ui.ButtonOptionWidget, OO.ui.OptionWidget );
3412 OO.mixinClass( OO.ui.ButtonOptionWidget, OO.ui.mixin.ButtonElement );
3413 OO.mixinClass( OO.ui.ButtonOptionWidget, OO.ui.mixin.IconElement );
3414 OO.mixinClass( OO.ui.ButtonOptionWidget, OO.ui.mixin.IndicatorElement );
3415 OO.mixinClass( OO.ui.ButtonOptionWidget, OO.ui.mixin.TitledElement );
3416
3417 /* Static Properties */
3418
3419 /**
3420  * Allow button mouse down events to pass through so they can be handled by the parent select widget
3421  *
3422  * @static
3423  * @inheritdoc
3424  */
3425 OO.ui.ButtonOptionWidget.static.cancelButtonMouseDownEvents = false;
3426
3427 /**
3428  * @static
3429  * @inheritdoc
3430  */
3431 OO.ui.ButtonOptionWidget.static.highlightable = false;
3432
3433 /* Methods */
3434
3435 /**
3436  * @inheritdoc
3437  */
3438 OO.ui.ButtonOptionWidget.prototype.setSelected = function ( state ) {
3439         OO.ui.ButtonOptionWidget.parent.prototype.setSelected.call( this, state );
3440
3441         if ( this.constructor.static.selectable ) {
3442                 this.setActive( state );
3443         }
3444
3445         return this;
3446 };
3447
3448 /**
3449  * ButtonSelectWidget is a {@link OO.ui.SelectWidget select widget} that contains
3450  * button options and is used together with
3451  * OO.ui.ButtonOptionWidget. The ButtonSelectWidget provides an interface for
3452  * highlighting, choosing, and selecting mutually exclusive options. Please see
3453  * the [OOUI documentation on MediaWiki] [1] for more information.
3454  *
3455  *     @example
3456  *     // Example: A ButtonSelectWidget that contains three ButtonOptionWidgets
3457  *     var option1 = new OO.ui.ButtonOptionWidget( {
3458  *         data: 1,
3459  *         label: 'Option 1',
3460  *         title: 'Button option 1'
3461  *     } );
3462  *
3463  *     var option2 = new OO.ui.ButtonOptionWidget( {
3464  *         data: 2,
3465  *         label: 'Option 2',
3466  *         title: 'Button option 2'
3467  *     } );
3468  *
3469  *     var option3 = new OO.ui.ButtonOptionWidget( {
3470  *         data: 3,
3471  *         label: 'Option 3',
3472  *         title: 'Button option 3'
3473  *     } );
3474  *
3475  *     var buttonSelect=new OO.ui.ButtonSelectWidget( {
3476  *         items: [ option1, option2, option3 ]
3477  *     } );
3478  *     $( 'body' ).append( buttonSelect.$element );
3479  *
3480  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets/Selects_and_Options
3481  *
3482  * @class
3483  * @extends OO.ui.SelectWidget
3484  * @mixins OO.ui.mixin.TabIndexedElement
3485  *
3486  * @constructor
3487  * @param {Object} [config] Configuration options
3488  */
3489 OO.ui.ButtonSelectWidget = function OoUiButtonSelectWidget( config ) {
3490         // Parent constructor
3491         OO.ui.ButtonSelectWidget.parent.call( this, config );
3492
3493         // Mixin constructors
3494         OO.ui.mixin.TabIndexedElement.call( this, config );
3495
3496         // Events
3497         this.$element.on( {
3498                 focus: this.bindKeyDownListener.bind( this ),
3499                 blur: this.unbindKeyDownListener.bind( this )
3500         } );
3501
3502         // Initialization
3503         this.$element.addClass( 'oo-ui-buttonSelectWidget' );
3504 };
3505
3506 /* Setup */
3507
3508 OO.inheritClass( OO.ui.ButtonSelectWidget, OO.ui.SelectWidget );
3509 OO.mixinClass( OO.ui.ButtonSelectWidget, OO.ui.mixin.TabIndexedElement );
3510
3511 /**
3512  * TabOptionWidget is an item in a {@link OO.ui.TabSelectWidget TabSelectWidget}.
3513  *
3514  * Currently, this class is only used by {@link OO.ui.IndexLayout index layouts}, which contain
3515  * {@link OO.ui.TabPanelLayout tab panel layouts}. See {@link OO.ui.IndexLayout IndexLayout}
3516  * for an example.
3517  *
3518  * @class
3519  * @extends OO.ui.OptionWidget
3520  *
3521  * @constructor
3522  * @param {Object} [config] Configuration options
3523  */
3524 OO.ui.TabOptionWidget = function OoUiTabOptionWidget( config ) {
3525         // Configuration initialization
3526         config = config || {};
3527
3528         // Parent constructor
3529         OO.ui.TabOptionWidget.parent.call( this, config );
3530
3531         // Initialization
3532         this.$element.addClass( 'oo-ui-tabOptionWidget' );
3533 };
3534
3535 /* Setup */
3536
3537 OO.inheritClass( OO.ui.TabOptionWidget, OO.ui.OptionWidget );
3538
3539 /* Static Properties */
3540
3541 /**
3542  * @static
3543  * @inheritdoc
3544  */
3545 OO.ui.TabOptionWidget.static.highlightable = false;
3546
3547 /**
3548  * TabSelectWidget is a list that contains {@link OO.ui.TabOptionWidget tab options}
3549  *
3550  * **Currently, this class is only used by {@link OO.ui.IndexLayout index layouts}.**
3551  *
3552  * @class
3553  * @extends OO.ui.SelectWidget
3554  * @mixins OO.ui.mixin.TabIndexedElement
3555  *
3556  * @constructor
3557  * @param {Object} [config] Configuration options
3558  */
3559 OO.ui.TabSelectWidget = function OoUiTabSelectWidget( config ) {
3560         // Parent constructor
3561         OO.ui.TabSelectWidget.parent.call( this, config );
3562
3563         // Mixin constructors
3564         OO.ui.mixin.TabIndexedElement.call( this, config );
3565
3566         // Events
3567         this.$element.on( {
3568                 focus: this.bindKeyDownListener.bind( this ),
3569                 blur: this.unbindKeyDownListener.bind( this )
3570         } );
3571
3572         // Initialization
3573         this.$element.addClass( 'oo-ui-tabSelectWidget' );
3574 };
3575
3576 /* Setup */
3577
3578 OO.inheritClass( OO.ui.TabSelectWidget, OO.ui.SelectWidget );
3579 OO.mixinClass( OO.ui.TabSelectWidget, OO.ui.mixin.TabIndexedElement );
3580
3581 /**
3582  * CapsuleItemWidgets are used within a {@link OO.ui.CapsuleMultiselectWidget
3583  * CapsuleMultiselectWidget} to display the selected items.
3584  *
3585  * @class
3586  * @extends OO.ui.Widget
3587  * @mixins OO.ui.mixin.ItemWidget
3588  * @mixins OO.ui.mixin.LabelElement
3589  * @mixins OO.ui.mixin.FlaggedElement
3590  * @mixins OO.ui.mixin.TabIndexedElement
3591  *
3592  * @constructor
3593  * @param {Object} [config] Configuration options
3594  */
3595 OO.ui.CapsuleItemWidget = function OoUiCapsuleItemWidget( config ) {
3596         // Configuration initialization
3597         config = config || {};
3598
3599         // Parent constructor
3600         OO.ui.CapsuleItemWidget.parent.call( this, config );
3601
3602         // Mixin constructors
3603         OO.ui.mixin.ItemWidget.call( this );
3604         OO.ui.mixin.LabelElement.call( this, config );
3605         OO.ui.mixin.FlaggedElement.call( this, config );
3606         OO.ui.mixin.TabIndexedElement.call( this, config );
3607
3608         // Events
3609         this.closeButton = new OO.ui.ButtonWidget( {
3610                 framed: false,
3611                 icon: 'close',
3612                 tabIndex: -1,
3613                 title: OO.ui.msg( 'ooui-item-remove' )
3614         } ).on( 'click', this.onCloseClick.bind( this ) );
3615
3616         this.on( 'disable', function ( disabled ) {
3617                 this.closeButton.setDisabled( disabled );
3618         }.bind( this ) );
3619
3620         // Initialization
3621         this.$element
3622                 .on( {
3623                         click: this.onClick.bind( this ),
3624                         keydown: this.onKeyDown.bind( this )
3625                 } )
3626                 .addClass( 'oo-ui-capsuleItemWidget' )
3627                 .append( this.$label, this.closeButton.$element );
3628 };
3629
3630 /* Setup */
3631
3632 OO.inheritClass( OO.ui.CapsuleItemWidget, OO.ui.Widget );
3633 OO.mixinClass( OO.ui.CapsuleItemWidget, OO.ui.mixin.ItemWidget );
3634 OO.mixinClass( OO.ui.CapsuleItemWidget, OO.ui.mixin.LabelElement );
3635 OO.mixinClass( OO.ui.CapsuleItemWidget, OO.ui.mixin.FlaggedElement );
3636 OO.mixinClass( OO.ui.CapsuleItemWidget, OO.ui.mixin.TabIndexedElement );
3637
3638 /* Methods */
3639
3640 /**
3641  * Handle close icon clicks
3642  */
3643 OO.ui.CapsuleItemWidget.prototype.onCloseClick = function () {
3644         var element = this.getElementGroup();
3645
3646         if ( element && $.isFunction( element.removeItems ) ) {
3647                 element.removeItems( [ this ] );
3648                 element.focus();
3649         }
3650 };
3651
3652 /**
3653  * Handle click event for the entire capsule
3654  */
3655 OO.ui.CapsuleItemWidget.prototype.onClick = function () {
3656         var element = this.getElementGroup();
3657
3658         if ( !this.isDisabled() && element && $.isFunction( element.editItem ) ) {
3659                 element.editItem( this );
3660         }
3661 };
3662
3663 /**
3664  * Handle keyDown event for the entire capsule
3665  *
3666  * @param {jQuery.Event} e Key down event
3667  */
3668 OO.ui.CapsuleItemWidget.prototype.onKeyDown = function ( e ) {
3669         var element = this.getElementGroup();
3670
3671         if ( e.keyCode === OO.ui.Keys.BACKSPACE || e.keyCode === OO.ui.Keys.DELETE ) {
3672                 element.removeItems( [ this ] );
3673                 element.focus();
3674                 return false;
3675         } else if ( e.keyCode === OO.ui.Keys.ENTER ) {
3676                 element.editItem( this );
3677                 return false;
3678         } else if ( e.keyCode === OO.ui.Keys.LEFT ) {
3679                 element.getPreviousItem( this ).focus();
3680         } else if ( e.keyCode === OO.ui.Keys.RIGHT ) {
3681                 element.getNextItem( this ).focus();
3682         }
3683 };
3684
3685 /**
3686  * CapsuleMultiselectWidgets are something like a {@link OO.ui.ComboBoxInputWidget combo box widget}
3687  * that allows for selecting multiple values.
3688  *
3689  * For more information about menus and options, please see the [OOUI documentation on MediaWiki][1].
3690  *
3691  *     @example
3692  *     // Example: A CapsuleMultiselectWidget.
3693  *     var capsule = new OO.ui.CapsuleMultiselectWidget( {
3694  *         label: 'CapsuleMultiselectWidget',
3695  *         selected: [ 'Option 1', 'Option 3' ],
3696  *         menu: {
3697  *             items: [
3698  *                 new OO.ui.MenuOptionWidget( {
3699  *                     data: 'Option 1',
3700  *                     label: 'Option One'
3701  *                 } ),
3702  *                 new OO.ui.MenuOptionWidget( {
3703  *                     data: 'Option 2',
3704  *                     label: 'Option Two'
3705  *                 } ),
3706  *                 new OO.ui.MenuOptionWidget( {
3707  *                     data: 'Option 3',
3708  *                     label: 'Option Three'
3709  *                 } ),
3710  *                 new OO.ui.MenuOptionWidget( {
3711  *                     data: 'Option 4',
3712  *                     label: 'Option Four'
3713  *                 } ),
3714  *                 new OO.ui.MenuOptionWidget( {
3715  *                     data: 'Option 5',
3716  *                     label: 'Option Five'
3717  *                 } )
3718  *             ]
3719  *         }
3720  *     } );
3721  *     $( 'body' ).append( capsule.$element );
3722  *
3723  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets/Selects_and_Options#Menu_selects_and_options
3724  *
3725  * @class
3726  * @extends OO.ui.Widget
3727  * @mixins OO.ui.mixin.GroupElement
3728  * @mixins OO.ui.mixin.PopupElement
3729  * @mixins OO.ui.mixin.TabIndexedElement
3730  * @mixins OO.ui.mixin.IndicatorElement
3731  * @mixins OO.ui.mixin.IconElement
3732  * @uses OO.ui.CapsuleItemWidget
3733  * @uses OO.ui.MenuSelectWidget
3734  *
3735  * @constructor
3736  * @param {Object} [config] Configuration options
3737  * @cfg {string} [placeholder] Placeholder text
3738  * @cfg {boolean} [allowArbitrary=false] Allow data items to be added even if not present in the menu.
3739  * @cfg {boolean} [allowDuplicates=false] Allow duplicate items to be added.
3740  * @cfg {Object} [menu] (required) Configuration options to pass to the
3741  *  {@link OO.ui.MenuSelectWidget menu select widget}.
3742  * @cfg {Object} [popup] Configuration options to pass to the {@link OO.ui.PopupWidget popup widget}.
3743  *  If specified, this popup will be shown instead of the menu (but the menu
3744  *  will still be used for item labels and allowArbitrary=false). The widgets
3745  *  in the popup should use {@link #addItemsFromData} or {@link #addItems} as necessary.
3746  * @cfg {jQuery} [$overlay=this.$element] Render the menu or popup into a separate layer.
3747  *  This configuration is useful in cases where the expanded menu is larger than
3748  *  its containing `<div>`. The specified overlay layer is usually on top of
3749  *  the containing `<div>` and has a larger area. By default, the menu uses
3750  *  relative positioning.
3751  *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
3752  */
3753 OO.ui.CapsuleMultiselectWidget = function OoUiCapsuleMultiselectWidget( config ) {
3754         var $tabFocus;
3755
3756         // Parent constructor
3757         OO.ui.CapsuleMultiselectWidget.parent.call( this, config );
3758
3759         // Configuration initialization
3760         config = $.extend( {
3761                 allowArbitrary: false,
3762                 allowDuplicates: false
3763         }, config );
3764
3765         // Properties (must be set before mixin constructor calls)
3766         this.$handle = $( '<div>' );
3767         this.$input = config.popup ? null : $( '<input>' );
3768         if ( config.placeholder !== undefined && config.placeholder !== '' ) {
3769                 this.$input.attr( 'placeholder', config.placeholder );
3770         }
3771
3772         // Mixin constructors
3773         OO.ui.mixin.GroupElement.call( this, config );
3774         if ( config.popup ) {
3775                 config.popup = $.extend( {}, config.popup, {
3776                         align: 'forwards',
3777                         anchor: false
3778                 } );
3779                 OO.ui.mixin.PopupElement.call( this, config );
3780                 $tabFocus = $( '<span>' );
3781                 OO.ui.mixin.TabIndexedElement.call( this, $.extend( {}, config, { $tabIndexed: $tabFocus } ) );
3782         } else {
3783                 this.popup = null;
3784                 $tabFocus = null;
3785                 OO.ui.mixin.TabIndexedElement.call( this, $.extend( {}, config, { $tabIndexed: this.$input } ) );
3786         }
3787         OO.ui.mixin.IndicatorElement.call( this, config );
3788         OO.ui.mixin.IconElement.call( this, config );
3789
3790         // Properties
3791         this.$content = $( '<div>' );
3792         this.allowArbitrary = config.allowArbitrary;
3793         this.allowDuplicates = config.allowDuplicates;
3794         this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;
3795         this.menu = new OO.ui.MenuSelectWidget( $.extend(
3796                 {
3797                         widget: this,
3798                         $input: this.$input,
3799                         $floatableContainer: this.$element,
3800                         filterFromInput: true,
3801                         disabled: this.isDisabled()
3802                 },
3803                 config.menu
3804         ) );
3805
3806         // Events
3807         if ( this.popup ) {
3808                 $tabFocus.on( {
3809                         focus: this.focus.bind( this )
3810                 } );
3811                 this.popup.$element.on( 'focusout', this.onPopupFocusOut.bind( this ) );
3812                 if ( this.popup.$autoCloseIgnore ) {
3813                         this.popup.$autoCloseIgnore.on( 'focusout', this.onPopupFocusOut.bind( this ) );
3814                 }
3815                 this.popup.connect( this, {
3816                         toggle: function ( visible ) {
3817                                 $tabFocus.toggle( !visible );
3818                         }
3819                 } );
3820         } else {
3821                 this.$input.on( {
3822                         focus: this.onInputFocus.bind( this ),
3823                         blur: this.onInputBlur.bind( this ),
3824                         'propertychange change click mouseup keydown keyup input cut paste select focus':
3825                                 OO.ui.debounce( this.updateInputSize.bind( this ) ),
3826                         keydown: this.onKeyDown.bind( this ),
3827                         keypress: this.onKeyPress.bind( this )
3828                 } );
3829         }
3830         this.menu.connect( this, {
3831                 choose: 'onMenuChoose',
3832                 toggle: 'onMenuToggle',
3833                 add: 'onMenuItemsChange',
3834                 remove: 'onMenuItemsChange'
3835         } );
3836         this.$handle.on( {
3837                 mousedown: this.onMouseDown.bind( this )
3838         } );
3839
3840         // Initialization
3841         if ( this.$input ) {
3842                 this.$input.prop( 'disabled', this.isDisabled() );
3843                 this.$input.attr( {
3844                         role: 'combobox',
3845                         'aria-owns': this.menu.getElementId(),
3846                         'aria-autocomplete': 'list'
3847                 } );
3848         }
3849         if ( config.data ) {
3850                 this.setItemsFromData( config.data );
3851         }
3852         this.$content.addClass( 'oo-ui-capsuleMultiselectWidget-content' )
3853                 .append( this.$group );
3854         this.$group.addClass( 'oo-ui-capsuleMultiselectWidget-group' );
3855         this.$handle.addClass( 'oo-ui-capsuleMultiselectWidget-handle' )
3856                 .append( this.$indicator, this.$icon, this.$content );
3857         this.$element.addClass( 'oo-ui-capsuleMultiselectWidget' )
3858                 .append( this.$handle );
3859         if ( this.popup ) {
3860                 this.popup.$element.addClass( 'oo-ui-capsuleMultiselectWidget-popup' );
3861                 this.$content.append( $tabFocus );
3862                 this.$overlay.append( this.popup.$element );
3863         } else {
3864                 this.$content.append( this.$input );
3865                 this.$overlay.append( this.menu.$element );
3866         }
3867         if ( $tabFocus ) {
3868                 $tabFocus.addClass( 'oo-ui-capsuleMultiselectWidget-focusTrap' );
3869         }
3870
3871         // Input size needs to be calculated after everything else is rendered
3872         setTimeout( function () {
3873                 if ( this.$input ) {
3874                         this.updateInputSize();
3875                 }
3876         }.bind( this ) );
3877
3878         this.onMenuItemsChange();
3879 };
3880
3881 /* Setup */
3882
3883 OO.inheritClass( OO.ui.CapsuleMultiselectWidget, OO.ui.Widget );
3884 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.GroupElement );
3885 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.PopupElement );
3886 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.TabIndexedElement );
3887 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.IndicatorElement );
3888 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.IconElement );
3889
3890 /* Events */
3891
3892 /**
3893  * @event change
3894  *
3895  * A change event is emitted when the set of selected items changes.
3896  *
3897  * @param {Mixed[]} datas Data of the now-selected items
3898  */
3899
3900 /**
3901  * @event resize
3902  *
3903  * A resize event is emitted when the widget's dimensions change to accomodate newly added items or
3904  * current user input.
3905  */
3906
3907 /* Methods */
3908
3909 /**
3910  * Construct a OO.ui.CapsuleItemWidget (or a subclass thereof) from given label and data.
3911  * May return `null` if the given label and data are not valid.
3912  *
3913  * @protected
3914  * @param {Mixed} data Custom data of any type.
3915  * @param {string} label The label text.
3916  * @return {OO.ui.CapsuleItemWidget|null}
3917  */
3918 OO.ui.CapsuleMultiselectWidget.prototype.createItemWidget = function ( data, label ) {
3919         if ( label === '' ) {
3920                 return null;
3921         }
3922         return new OO.ui.CapsuleItemWidget( { data: data, label: label } );
3923 };
3924
3925 /**
3926  * @inheritdoc
3927  */
3928 OO.ui.CapsuleMultiselectWidget.prototype.getInputId = function () {
3929         if ( !this.$input ) {
3930                 return null;
3931         }
3932         return OO.ui.mixin.TabIndexedElement.prototype.getInputId.call( this );
3933 };
3934
3935 /**
3936  * Get the data of the items in the capsule
3937  *
3938  * @return {Mixed[]}
3939  */
3940 OO.ui.CapsuleMultiselectWidget.prototype.getItemsData = function () {
3941         return this.getItems().map( function ( item ) {
3942                 return item.data;
3943         } );
3944 };
3945
3946 /**
3947  * Set the items in the capsule by providing data
3948  *
3949  * @chainable
3950  * @param {Mixed[]} datas
3951  * @return {OO.ui.CapsuleMultiselectWidget}
3952  */
3953 OO.ui.CapsuleMultiselectWidget.prototype.setItemsFromData = function ( datas ) {
3954         var widget = this,
3955                 menu = this.menu,
3956                 items = this.getItems();
3957
3958         $.each( datas, function ( i, data ) {
3959                 var j, label,
3960                         item = menu.findItemFromData( data );
3961
3962                 if ( item ) {
3963                         label = item.label;
3964                 } else if ( widget.allowArbitrary ) {
3965                         label = String( data );
3966                 } else {
3967                         return;
3968                 }
3969
3970                 item = null;
3971                 for ( j = 0; j < items.length; j++ ) {
3972                         if ( items[ j ].data === data && items[ j ].label === label ) {
3973                                 item = items[ j ];
3974                                 items.splice( j, 1 );
3975                                 break;
3976                         }
3977                 }
3978                 if ( !item ) {
3979                         item = widget.createItemWidget( data, label );
3980                 }
3981                 if ( item ) {
3982                         widget.addItems( [ item ], i );
3983                 }
3984         } );
3985
3986         if ( items.length ) {
3987                 widget.removeItems( items );
3988         }
3989
3990         return this;
3991 };
3992
3993 /**
3994  * Add items to the capsule by providing their data
3995  *
3996  * @chainable
3997  * @param {Mixed[]} datas
3998  * @return {OO.ui.CapsuleMultiselectWidget}
3999  */
4000 OO.ui.CapsuleMultiselectWidget.prototype.addItemsFromData = function ( datas ) {
4001         var widget = this,
4002                 menu = this.menu,
4003                 items = [];
4004
4005         $.each( datas, function ( i, data ) {
4006                 var item;
4007
4008                 if ( !widget.findItemFromData( data ) || widget.allowDuplicates ) {
4009                         item = menu.findItemFromData( data );
4010                         if ( item ) {
4011                                 item = widget.createItemWidget( data, item.label );
4012                         } else if ( widget.allowArbitrary ) {
4013                                 item = widget.createItemWidget( data, String( data ) );
4014                         }
4015                         if ( item ) {
4016                                 items.push( item );
4017                         }
4018                 }
4019         } );
4020
4021         if ( items.length ) {
4022                 this.addItems( items );
4023         }
4024
4025         return this;
4026 };
4027
4028 /**
4029  * Add items to the capsule by providing a label
4030  *
4031  * @param {string} label
4032  * @return {boolean} Whether the item was added or not
4033  */
4034 OO.ui.CapsuleMultiselectWidget.prototype.addItemFromLabel = function ( label ) {
4035         var item, items;
4036         item = this.menu.getItemFromLabel( label, true );
4037         if ( item ) {
4038                 this.addItemsFromData( [ item.data ] );
4039                 return true;
4040         } else if ( this.allowArbitrary ) {
4041                 items = this.getItems();
4042                 this.addItemsFromData( [ label ] );
4043                 return !OO.compare( this.getItems(), items );
4044         }
4045         return false;
4046 };
4047
4048 /**
4049  * Remove items by data
4050  *
4051  * @chainable
4052  * @param {Mixed[]} datas
4053  * @return {OO.ui.CapsuleMultiselectWidget}
4054  */
4055 OO.ui.CapsuleMultiselectWidget.prototype.removeItemsFromData = function ( datas ) {
4056         var widget = this,
4057                 items = [];
4058
4059         $.each( datas, function ( i, data ) {
4060                 var item = widget.findItemFromData( data );
4061                 if ( item ) {
4062                         items.push( item );
4063                 }
4064         } );
4065
4066         if ( items.length ) {
4067                 this.removeItems( items );
4068         }
4069
4070         return this;
4071 };
4072
4073 /**
4074  * @inheritdoc
4075  */
4076 OO.ui.CapsuleMultiselectWidget.prototype.addItems = function ( items ) {
4077         var same, i, l,
4078                 oldItems = this.items.slice();
4079
4080         OO.ui.mixin.GroupElement.prototype.addItems.call( this, items );
4081
4082         if ( this.items.length !== oldItems.length ) {
4083                 same = false;
4084         } else {
4085                 same = true;
4086                 for ( i = 0, l = oldItems.length; same && i < l; i++ ) {
4087                         same = same && this.items[ i ] === oldItems[ i ];
4088                 }
4089         }
4090         if ( !same ) {
4091                 this.emit( 'change', this.getItemsData() );
4092                 this.updateInputSize();
4093         }
4094
4095         return this;
4096 };
4097
4098 /**
4099  * Removes the item from the list and copies its label to `this.$input`.
4100  *
4101  * @param {Object} item
4102  */
4103 OO.ui.CapsuleMultiselectWidget.prototype.editItem = function ( item ) {
4104         this.addItemFromLabel( this.$input.val() );
4105         this.clearInput();
4106         this.$input.val( item.label );
4107         this.updateInputSize();
4108         this.focus();
4109         this.menu.updateItemVisibility(); // Hack, we shouldn't be calling this method directly
4110         this.removeItems( [ item ] );
4111 };
4112
4113 /**
4114  * @inheritdoc
4115  */
4116 OO.ui.CapsuleMultiselectWidget.prototype.removeItems = function ( items ) {
4117         var same, i, l,
4118                 oldItems = this.items.slice();
4119
4120         OO.ui.mixin.GroupElement.prototype.removeItems.call( this, items );
4121
4122         if ( this.items.length !== oldItems.length ) {
4123                 same = false;
4124         } else {
4125                 same = true;
4126                 for ( i = 0, l = oldItems.length; same && i < l; i++ ) {
4127                         same = same && this.items[ i ] === oldItems[ i ];
4128                 }
4129         }
4130         if ( !same ) {
4131                 this.emit( 'change', this.getItemsData() );
4132                 this.updateInputSize();
4133         }
4134
4135         return this;
4136 };
4137
4138 /**
4139  * @inheritdoc
4140  */
4141 OO.ui.CapsuleMultiselectWidget.prototype.clearItems = function () {
4142         if ( this.items.length ) {
4143                 OO.ui.mixin.GroupElement.prototype.clearItems.call( this );
4144                 this.emit( 'change', this.getItemsData() );
4145                 this.updateInputSize();
4146         }
4147         return this;
4148 };
4149
4150 /**
4151  * Given an item, returns the item after it. If its the last item,
4152  * returns `this.$input`. If no item is passed, returns the very first
4153  * item.
4154  *
4155  * @param {OO.ui.CapsuleItemWidget} [item]
4156  * @return {OO.ui.CapsuleItemWidget|jQuery|boolean}
4157  */
4158 OO.ui.CapsuleMultiselectWidget.prototype.getNextItem = function ( item ) {
4159         var itemIndex;
4160
4161         if ( item === undefined ) {
4162                 return this.items[ 0 ];
4163         }
4164
4165         itemIndex = this.items.indexOf( item );
4166         if ( itemIndex < 0 ) { // Item not in list
4167                 return false;
4168         } else if ( itemIndex === this.items.length - 1 ) { // Last item
4169                 return this.$input;
4170         } else {
4171                 return this.items[ itemIndex + 1 ];
4172         }
4173 };
4174
4175 /**
4176  * Given an item, returns the item before it. If its the first item,
4177  * returns `this.$input`. If no item is passed, returns the very last
4178  * item.
4179  *
4180  * @param {OO.ui.CapsuleItemWidget} [item]
4181  * @return {OO.ui.CapsuleItemWidget|jQuery|boolean}
4182  */
4183 OO.ui.CapsuleMultiselectWidget.prototype.getPreviousItem = function ( item ) {
4184         var itemIndex;
4185
4186         if ( item === undefined ) {
4187                 return this.items[ this.items.length - 1 ];
4188         }
4189
4190         itemIndex = this.items.indexOf( item );
4191         if ( itemIndex < 0 ) { // Item not in list
4192                 return false;
4193         } else if ( itemIndex === 0 ) { // First item
4194                 return this.$input;
4195         } else {
4196                 return this.items[ itemIndex - 1 ];
4197         }
4198 };
4199
4200 /**
4201  * Get the capsule widget's menu.
4202  *
4203  * @return {OO.ui.MenuSelectWidget} Menu widget
4204  */
4205 OO.ui.CapsuleMultiselectWidget.prototype.getMenu = function () {
4206         return this.menu;
4207 };
4208
4209 /**
4210  * Handle focus events
4211  *
4212  * @private
4213  * @param {jQuery.Event} event
4214  */
4215 OO.ui.CapsuleMultiselectWidget.prototype.onInputFocus = function () {
4216         if ( !this.isDisabled() ) {
4217                 this.updateInputSize();
4218                 this.menu.toggle( true );
4219         }
4220 };
4221
4222 /**
4223  * Handle blur events
4224  *
4225  * @private
4226  * @param {jQuery.Event} event
4227  */
4228 OO.ui.CapsuleMultiselectWidget.prototype.onInputBlur = function () {
4229         this.addItemFromLabel( this.$input.val() );
4230         this.clearInput();
4231 };
4232
4233 /**
4234  * Handles popup focus out events.
4235  *
4236  * @private
4237  * @param {jQuery.Event} e Focus out event
4238  */
4239 OO.ui.CapsuleMultiselectWidget.prototype.onPopupFocusOut = function () {
4240         var widget = this.popup;
4241
4242         setTimeout( function () {
4243                 if (
4244                         widget.isVisible() &&
4245                         !OO.ui.contains( widget.$element.add( widget.$autoCloseIgnore ).get(), document.activeElement, true )
4246                 ) {
4247                         widget.toggle( false );
4248                 }
4249         } );
4250 };
4251
4252 /**
4253  * Handle mouse down events.
4254  *
4255  * @private
4256  * @param {jQuery.Event} e Mouse down event
4257  */
4258 OO.ui.CapsuleMultiselectWidget.prototype.onMouseDown = function ( e ) {
4259         if ( e.which === OO.ui.MouseButtons.LEFT ) {
4260                 this.focus();
4261                 return false;
4262         } else {
4263                 this.updateInputSize();
4264         }
4265 };
4266
4267 /**
4268  * Handle key press events.
4269  *
4270  * @private
4271  * @param {jQuery.Event} e Key press event
4272  */
4273 OO.ui.CapsuleMultiselectWidget.prototype.onKeyPress = function ( e ) {
4274         if ( !this.isDisabled() ) {
4275                 if ( e.which === OO.ui.Keys.ESCAPE ) {
4276                         this.clearInput();
4277                         return false;
4278                 }
4279
4280                 if ( !this.popup ) {
4281                         this.menu.toggle( true );
4282                         if ( e.which === OO.ui.Keys.ENTER ) {
4283                                 if ( this.addItemFromLabel( this.$input.val() ) ) {
4284                                         this.clearInput();
4285                                 }
4286                                 return false;
4287                         }
4288
4289                         // Make sure the input gets resized.
4290                         setTimeout( this.updateInputSize.bind( this ), 0 );
4291                 }
4292         }
4293 };
4294
4295 /**
4296  * Handle key down events.
4297  *
4298  * @private
4299  * @param {jQuery.Event} e Key down event
4300  */
4301 OO.ui.CapsuleMultiselectWidget.prototype.onKeyDown = function ( e ) {
4302         if (
4303                 !this.isDisabled() &&
4304                 this.$input.val() === '' &&
4305                 this.items.length
4306         ) {
4307                 // 'keypress' event is not triggered for Backspace
4308                 if ( e.keyCode === OO.ui.Keys.BACKSPACE ) {
4309                         if ( e.metaKey || e.ctrlKey ) {
4310                                 this.removeItems( this.items.slice( -1 ) );
4311                         } else {
4312                                 this.editItem( this.items[ this.items.length - 1 ] );
4313                         }
4314                         return false;
4315                 } else if ( e.keyCode === OO.ui.Keys.LEFT ) {
4316                         this.getPreviousItem().focus();
4317                 } else if ( e.keyCode === OO.ui.Keys.RIGHT ) {
4318                         this.getNextItem().focus();
4319                 }
4320         }
4321 };
4322
4323 /**
4324  * Update the dimensions of the text input field to encompass all available area.
4325  *
4326  * @private
4327  * @param {jQuery.Event} e Event of some sort
4328  */
4329 OO.ui.CapsuleMultiselectWidget.prototype.updateInputSize = function () {
4330         var $lastItem, direction, contentWidth, currentWidth, bestWidth;
4331         if ( this.$input && !this.isDisabled() ) {
4332                 this.$input.css( 'width', '1em' );
4333                 $lastItem = this.$group.children().last();
4334                 direction = OO.ui.Element.static.getDir( this.$handle );
4335
4336                 // Get the width of the input with the placeholder text as
4337                 // the value and save it so that we don't keep recalculating
4338                 if (
4339                         this.contentWidthWithPlaceholder === undefined &&
4340                         this.$input.val() === '' &&
4341                         this.$input.attr( 'placeholder' ) !== undefined
4342                 ) {
4343                         this.$input.val( this.$input.attr( 'placeholder' ) );
4344                         this.contentWidthWithPlaceholder = this.$input[ 0 ].scrollWidth;
4345                         this.$input.val( '' );
4346
4347                 }
4348
4349                 // Always keep the input wide enough for the placeholder text
4350                 contentWidth = Math.max(
4351                         this.$input[ 0 ].scrollWidth,
4352                         // undefined arguments in Math.max lead to NaN
4353                         ( this.contentWidthWithPlaceholder === undefined ) ?
4354                                 0 : this.contentWidthWithPlaceholder
4355                 );
4356                 currentWidth = this.$input.width();
4357
4358                 if ( contentWidth < currentWidth ) {
4359                         this.updateIfHeightChanged();
4360                         // All is fine, don't perform expensive calculations
4361                         return;
4362                 }
4363
4364                 if ( $lastItem.length === 0 ) {
4365                         bestWidth = this.$content.innerWidth();
4366                 } else {
4367                         bestWidth = direction === 'ltr' ?
4368                                 this.$content.innerWidth() - $lastItem.position().left - $lastItem.outerWidth() :
4369                                 $lastItem.position().left;
4370                 }
4371
4372                 // Some safety margin for sanity, because I *really* don't feel like finding out where the few
4373                 // pixels this is off by are coming from.
4374                 bestWidth -= 10;
4375                 if ( contentWidth > bestWidth ) {
4376                         // This will result in the input getting shifted to the next line
4377                         bestWidth = this.$content.innerWidth() - 10;
4378                 }
4379                 this.$input.width( Math.floor( bestWidth ) );
4380                 this.updateIfHeightChanged();
4381         } else {
4382                 this.updateIfHeightChanged();
4383         }
4384 };
4385
4386 /**
4387  * Determine if widget height changed, and if so, update menu position and emit 'resize' event.
4388  *
4389  * @private
4390  */
4391 OO.ui.CapsuleMultiselectWidget.prototype.updateIfHeightChanged = function () {
4392         var height = this.$element.height();
4393         if ( height !== this.height ) {
4394                 this.height = height;
4395                 this.menu.position();
4396                 if ( this.popup ) {
4397                         this.popup.updateDimensions();
4398                 }
4399                 this.emit( 'resize' );
4400         }
4401 };
4402
4403 /**
4404  * Handle menu choose events.
4405  *
4406  * @private
4407  * @param {OO.ui.OptionWidget} item Chosen item
4408  */
4409 OO.ui.CapsuleMultiselectWidget.prototype.onMenuChoose = function ( item ) {
4410         if ( item && item.isVisible() ) {
4411                 this.addItemsFromData( [ item.getData() ] );
4412                 this.clearInput();
4413         }
4414 };
4415
4416 /**
4417  * Handle menu toggle events.
4418  *
4419  * @private
4420  * @param {boolean} isVisible Open state of the menu
4421  */
4422 OO.ui.CapsuleMultiselectWidget.prototype.onMenuToggle = function ( isVisible ) {
4423         this.$element.toggleClass( 'oo-ui-capsuleMultiselectWidget-open', isVisible );
4424 };
4425
4426 /**
4427  * Handle menu item change events.
4428  *
4429  * @private
4430  */
4431 OO.ui.CapsuleMultiselectWidget.prototype.onMenuItemsChange = function () {
4432         this.setItemsFromData( this.getItemsData() );
4433         this.$element.toggleClass( 'oo-ui-capsuleMultiselectWidget-empty', this.menu.isEmpty() );
4434 };
4435
4436 /**
4437  * Clear the input field
4438  *
4439  * @private
4440  */
4441 OO.ui.CapsuleMultiselectWidget.prototype.clearInput = function () {
4442         if ( this.$input ) {
4443                 this.$input.val( '' );
4444                 this.updateInputSize();
4445         }
4446         if ( this.popup ) {
4447                 this.popup.toggle( false );
4448         }
4449         this.menu.toggle( false );
4450         this.menu.selectItem();
4451         this.menu.highlightItem();
4452 };
4453
4454 /**
4455  * @inheritdoc
4456  */
4457 OO.ui.CapsuleMultiselectWidget.prototype.setDisabled = function ( disabled ) {
4458         var i, len;
4459
4460         // Parent method
4461         OO.ui.CapsuleMultiselectWidget.parent.prototype.setDisabled.call( this, disabled );
4462
4463         if ( this.$input ) {
4464                 this.$input.prop( 'disabled', this.isDisabled() );
4465         }
4466         if ( this.menu ) {
4467                 this.menu.setDisabled( this.isDisabled() );
4468         }
4469         if ( this.popup ) {
4470                 this.popup.setDisabled( this.isDisabled() );
4471         }
4472
4473         if ( this.items ) {
4474                 for ( i = 0, len = this.items.length; i < len; i++ ) {
4475                         this.items[ i ].updateDisabled();
4476                 }
4477         }
4478
4479         return this;
4480 };
4481
4482 /**
4483  * Focus the widget
4484  *
4485  * @chainable
4486  */
4487 OO.ui.CapsuleMultiselectWidget.prototype.focus = function () {
4488         if ( !this.isDisabled() ) {
4489                 if ( this.popup ) {
4490                         this.popup.setSize( this.$handle.outerWidth() );
4491                         this.popup.toggle( true );
4492                         OO.ui.findFocusable( this.popup.$element ).focus();
4493                 } else {
4494                         OO.ui.mixin.TabIndexedElement.prototype.focus.call( this );
4495                 }
4496         }
4497         return this;
4498 };
4499
4500 /**
4501  * TagItemWidgets are used within a {@link OO.ui.TagMultiselectWidget
4502  * TagMultiselectWidget} to display the selected items.
4503  *
4504  * @class
4505  * @extends OO.ui.Widget
4506  * @mixins OO.ui.mixin.ItemWidget
4507  * @mixins OO.ui.mixin.LabelElement
4508  * @mixins OO.ui.mixin.FlaggedElement
4509  * @mixins OO.ui.mixin.TabIndexedElement
4510  * @mixins OO.ui.mixin.DraggableElement
4511  *
4512  * @constructor
4513  * @param {Object} [config] Configuration object
4514  * @cfg {boolean} [valid=true] Item is valid
4515  * @cfg {boolean} [fixed] Item is fixed. This means the item is
4516  *  always included in the values and cannot be removed.
4517  */
4518 OO.ui.TagItemWidget = function OoUiTagItemWidget( config ) {
4519         config = config || {};
4520
4521         // Parent constructor
4522         OO.ui.TagItemWidget.parent.call( this, config );
4523
4524         // Mixin constructors
4525         OO.ui.mixin.ItemWidget.call( this );
4526         OO.ui.mixin.LabelElement.call( this, config );
4527         OO.ui.mixin.FlaggedElement.call( this, config );
4528         OO.ui.mixin.TabIndexedElement.call( this, config );
4529         OO.ui.mixin.DraggableElement.call( this, config );
4530
4531         this.valid = config.valid === undefined ? true : !!config.valid;
4532         this.fixed = !!config.fixed;
4533
4534         this.closeButton = new OO.ui.ButtonWidget( {
4535                 framed: false,
4536                 icon: 'close',
4537                 tabIndex: -1,
4538                 title: OO.ui.msg( 'ooui-item-remove' )
4539         } );
4540         this.closeButton.setDisabled( this.isDisabled() );
4541
4542         // Events
4543         this.closeButton
4544                 .connect( this, { click: 'remove' } );
4545         this.$element
4546                 .on( 'click', this.select.bind( this ) )
4547                 .on( 'keydown', this.onKeyDown.bind( this ) )
4548                 // Prevent propagation of mousedown; the tag item "lives" in the
4549                 // clickable area of the TagMultiselectWidget, which listens to
4550                 // mousedown to open the menu or popup. We want to prevent that
4551                 // for clicks specifically on the tag itself, so the actions taken
4552                 // are more deliberate. When the tag is clicked, it will emit the
4553                 // selection event (similar to how #OO.ui.MultioptionWidget emits 'change')
4554                 // and can be handled separately.
4555                 .on( 'mousedown', function ( e ) { e.stopPropagation(); } );
4556
4557         // Initialization
4558         this.$element
4559                 .addClass( 'oo-ui-tagItemWidget' )
4560                 .append( this.$label, this.closeButton.$element );
4561 };
4562
4563 /* Initialization */
4564
4565 OO.inheritClass( OO.ui.TagItemWidget, OO.ui.Widget );
4566 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.ItemWidget );
4567 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.LabelElement );
4568 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.FlaggedElement );
4569 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.TabIndexedElement );
4570 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.DraggableElement );
4571
4572 /* Events */
4573
4574 /**
4575  * @event remove
4576  *
4577  * A remove action was performed on the item
4578  */
4579
4580 /**
4581  * @event navigate
4582  * @param {string} direction Direction of the movement, forward or backwards
4583  *
4584  * A navigate action was performed on the item
4585  */
4586
4587 /**
4588  * @event select
4589  *
4590  * The tag widget was selected. This can occur when the widget
4591  * is either clicked or enter was pressed on it.
4592  */
4593
4594 /**
4595  * @event valid
4596  * @param {boolean} isValid Item is valid
4597  *
4598  * Item validity has changed
4599  */
4600
4601 /**
4602  * @event fixed
4603  * @param {boolean} isFixed Item is fixed
4604  *
4605  * Item fixed state has changed
4606  */
4607
4608 /* Methods */
4609
4610 /**
4611  * Set this item as fixed, meaning it cannot be removed
4612  *
4613  * @param {string} [state] Item is fixed
4614  * @fires fixed
4615  */
4616 OO.ui.TagItemWidget.prototype.setFixed = function ( state ) {
4617         state = state === undefined ? !this.fixed : !!state;
4618
4619         if ( this.fixed !== state ) {
4620                 this.fixed = state;
4621                 if ( this.closeButton ) {
4622                         this.closeButton.toggle( !this.fixed );
4623                 }
4624
4625                 if ( !this.fixed && this.elementGroup && !this.elementGroup.isDraggable() ) {
4626                         // Only enable the state of the item if the
4627                         // entire group is draggable
4628                         this.toggleDraggable( !this.fixed );
4629                 }
4630                 this.$element.toggleClass( 'oo-ui-tagItemWidget-fixed', this.fixed );
4631
4632                 this.emit( 'fixed', this.isFixed() );
4633         }
4634         return this;
4635 };
4636
4637 /**
4638  * Check whether the item is fixed
4639  */
4640 OO.ui.TagItemWidget.prototype.isFixed = function () {
4641         return this.fixed;
4642 };
4643
4644 /**
4645  * @inheritdoc
4646  */
4647 OO.ui.TagItemWidget.prototype.setDisabled = function ( state ) {
4648         if ( state && this.elementGroup && !this.elementGroup.isDisabled() ) {
4649                 OO.ui.warnDeprecation( 'TagItemWidget#setDisabled: Disabling individual items is deprecated and will result in inconsistent behavior. Use #setFixed instead. See T193571.' );
4650         }
4651         // Parent method
4652         OO.ui.TagItemWidget.parent.prototype.setDisabled.call( this, state );
4653         if (
4654                 !state &&
4655                 // Verify we have a group, and that the widget is ready
4656                 this.toggleDraggable && this.elementGroup &&
4657                 !this.isFixed() &&
4658                 !this.elementGroup.isDraggable()
4659         ) {
4660                 // Only enable the draggable state of the item if the
4661                 // entire group is draggable to begin with, and if the
4662                 // item is not fixed
4663                 this.toggleDraggable( !state );
4664         }
4665
4666         if ( this.closeButton ) {
4667                 this.closeButton.setDisabled( state );
4668         }
4669
4670         return this;
4671 };
4672
4673 /**
4674  * Handle removal of the item
4675  *
4676  * This is mainly for extensibility concerns, so other children
4677  * of this class can change the behavior if they need to. This
4678  * is called by both clicking the 'remove' button but also
4679  * on keypress, which is harder to override if needed.
4680  *
4681  * @fires remove
4682  */
4683 OO.ui.TagItemWidget.prototype.remove = function () {
4684         if ( !this.isDisabled() && !this.isFixed() ) {
4685                 this.emit( 'remove' );
4686         }
4687 };
4688
4689 /**
4690  * Handle a keydown event on the widget
4691  *
4692  * @fires navigate
4693  * @fires remove
4694  * @param {jQuery.Event} e Key down event
4695  * @return {boolean|undefined} false to stop the operation
4696  */
4697 OO.ui.TagItemWidget.prototype.onKeyDown = function ( e ) {
4698         var movement;
4699
4700         if ( !this.isDisabled() && !this.isFixed() && e.keyCode === OO.ui.Keys.BACKSPACE || e.keyCode === OO.ui.Keys.DELETE ) {
4701                 this.remove();
4702                 return false;
4703         } else if ( e.keyCode === OO.ui.Keys.ENTER ) {
4704                 this.select();
4705                 return false;
4706         } else if (
4707                 e.keyCode === OO.ui.Keys.LEFT ||
4708                 e.keyCode === OO.ui.Keys.RIGHT
4709         ) {
4710                 if ( OO.ui.Element.static.getDir( this.$element ) === 'rtl' ) {
4711                         movement = {
4712                                 left: 'forwards',
4713                                 right: 'backwards'
4714                         };
4715                 } else {
4716                         movement = {
4717                                 left: 'backwards',
4718                                 right: 'forwards'
4719                         };
4720                 }
4721
4722                 this.emit(
4723                         'navigate',
4724                         e.keyCode === OO.ui.Keys.LEFT ?
4725                                 movement.left : movement.right
4726                 );
4727                 return false;
4728         }
4729 };
4730
4731 /**
4732  * Select this item
4733  *
4734  * @fires select
4735  */
4736 OO.ui.TagItemWidget.prototype.select = function () {
4737         if ( !this.isDisabled() ) {
4738                 this.emit( 'select' );
4739         }
4740 };
4741
4742 /**
4743  * Set the valid state of this item
4744  *
4745  * @param {boolean} [valid] Item is valid
4746  * @fires valid
4747  */
4748 OO.ui.TagItemWidget.prototype.toggleValid = function ( valid ) {
4749         valid = valid === undefined ? !this.valid : !!valid;
4750
4751         if ( this.valid !== valid ) {
4752                 this.valid = valid;
4753
4754                 this.setFlags( { invalid: !this.valid } );
4755
4756                 this.emit( 'valid', this.valid );
4757         }
4758 };
4759
4760 /**
4761  * Check whether the item is valid
4762  *
4763  * @return {boolean} Item is valid
4764  */
4765 OO.ui.TagItemWidget.prototype.isValid = function () {
4766         return this.valid;
4767 };
4768
4769 /**
4770  * A basic tag multiselect widget, similar in concept to {@link OO.ui.ComboBoxInputWidget combo box widget}
4771  * that allows the user to add multiple values that are displayed in a tag area.
4772  *
4773  * This widget is a base widget; see {@link OO.ui.MenuTagMultiselectWidget MenuTagMultiselectWidget} and
4774  * {@link OO.ui.PopupTagMultiselectWidget PopupTagMultiselectWidget} for the implementations that use
4775  * a menu and a popup respectively.
4776  *
4777  *     @example
4778  *     // Example: A basic TagMultiselectWidget.
4779  *     var widget = new OO.ui.TagMultiselectWidget( {
4780  *         inputPosition: 'outline',
4781  *         allowedValues: [ 'Option 1', 'Option 2', 'Option 3' ],
4782  *         selected: [ 'Option 1' ]
4783  *     } );
4784  *     $( 'body' ).append( widget.$element );
4785  *
4786  * @class
4787  * @extends OO.ui.Widget
4788  * @mixins OO.ui.mixin.GroupWidget
4789  * @mixins OO.ui.mixin.DraggableGroupElement
4790  * @mixins OO.ui.mixin.IndicatorElement
4791  * @mixins OO.ui.mixin.IconElement
4792  * @mixins OO.ui.mixin.TabIndexedElement
4793  * @mixins OO.ui.mixin.FlaggedElement
4794  *
4795  * @constructor
4796  * @param {Object} config Configuration object
4797  * @cfg {Object} [input] Configuration options for the input widget
4798  * @cfg {OO.ui.InputWidget} [inputWidget] An optional input widget. If given, it will
4799  *  replace the input widget used in the TagMultiselectWidget. If not given,
4800  *  TagMultiselectWidget creates its own.
4801  * @cfg {boolean} [inputPosition='inline'] Position of the input. Options are:
4802  *      - inline: The input is invisible, but exists inside the tag list, so
4803  *              the user types into the tag groups to add tags.
4804  *      - outline: The input is underneath the tag area.
4805  *      - none: No input supplied
4806  * @cfg {boolean} [allowEditTags=true] Allow editing of the tags by clicking them
4807  * @cfg {boolean} [allowArbitrary=false] Allow data items to be added even if
4808  *  not present in the menu.
4809  * @cfg {Object[]} [allowedValues] An array representing the allowed items
4810  *  by their datas.
4811  * @cfg {boolean} [allowDuplicates=false] Allow duplicate items to be added
4812  * @cfg {boolean} [allowDisplayInvalidTags=false] Allow the display of
4813  *  invalid tags. These tags will display with an invalid state, and
4814  *  the widget as a whole will have an invalid state if any invalid tags
4815  *  are present.
4816  * @cfg {boolean} [allowReordering=true] Allow reordering of the items
4817  * @cfg {Object[]|String[]} [selected] A set of selected tags. If given,
4818  *  these will appear in the tag list on initialization, as long as they
4819  *  pass the validity tests.
4820  */
4821 OO.ui.TagMultiselectWidget = function OoUiTagMultiselectWidget( config ) {
4822         var inputEvents,
4823                 rAF = window.requestAnimationFrame || setTimeout,
4824                 widget = this,
4825                 $tabFocus = $( '<span>' )
4826                         .addClass( 'oo-ui-tagMultiselectWidget-focusTrap' );
4827
4828         config = config || {};
4829
4830         // Parent constructor
4831         OO.ui.TagMultiselectWidget.parent.call( this, config );
4832
4833         // Mixin constructors
4834         OO.ui.mixin.GroupWidget.call( this, config );
4835         OO.ui.mixin.IndicatorElement.call( this, config );
4836         OO.ui.mixin.IconElement.call( this, config );
4837         OO.ui.mixin.TabIndexedElement.call( this, config );
4838         OO.ui.mixin.FlaggedElement.call( this, config );
4839         OO.ui.mixin.DraggableGroupElement.call( this, config );
4840
4841         this.toggleDraggable(
4842                 config.allowReordering === undefined ?
4843                         true : !!config.allowReordering
4844         );
4845
4846         this.inputPosition =
4847                 this.constructor.static.allowedInputPositions.indexOf( config.inputPosition ) > -1 ?
4848                         config.inputPosition : 'inline';
4849         this.allowEditTags = config.allowEditTags === undefined ? true : !!config.allowEditTags;
4850         this.allowArbitrary = !!config.allowArbitrary;
4851         this.allowDuplicates = !!config.allowDuplicates;
4852         this.allowedValues = config.allowedValues || [];
4853         this.allowDisplayInvalidTags = config.allowDisplayInvalidTags;
4854         this.hasInput = this.inputPosition !== 'none';
4855         this.height = null;
4856         this.valid = true;
4857
4858         this.$content = $( '<div>' )
4859                 .addClass( 'oo-ui-tagMultiselectWidget-content' );
4860         this.$handle = $( '<div>' )
4861                 .addClass( 'oo-ui-tagMultiselectWidget-handle' )
4862                 .append(
4863                         this.$indicator,
4864                         this.$icon,
4865                         this.$content
4866                                 .append(
4867                                         this.$group
4868                                                 .addClass( 'oo-ui-tagMultiselectWidget-group' )
4869                                 )
4870                 );
4871
4872         // Events
4873         this.aggregate( {
4874                 remove: 'itemRemove',
4875                 navigate: 'itemNavigate',
4876                 select: 'itemSelect',
4877                 fixed: 'itemFixed'
4878         } );
4879         this.connect( this, {
4880                 itemRemove: 'onTagRemove',
4881                 itemSelect: 'onTagSelect',
4882                 itemFixed: 'onTagFixed',
4883                 itemNavigate: 'onTagNavigate',
4884                 change: 'onChangeTags'
4885         } );
4886         this.$handle.on( {
4887                 mousedown: this.onMouseDown.bind( this )
4888         } );
4889
4890         // Initialize
4891         this.$element
4892                 .addClass( 'oo-ui-tagMultiselectWidget' )
4893                 .append( this.$handle );
4894
4895         if ( this.hasInput ) {
4896                 if ( config.inputWidget ) {
4897                         this.input = config.inputWidget;
4898                 } else {
4899                         this.input = new OO.ui.TextInputWidget( $.extend( {
4900                                 placeholder: config.placeholder,
4901                                 classes: [ 'oo-ui-tagMultiselectWidget-input' ]
4902                         }, config.input ) );
4903                 }
4904                 this.input.setDisabled( this.isDisabled() );
4905
4906                 inputEvents = {
4907                         focus: this.onInputFocus.bind( this ),
4908                         blur: this.onInputBlur.bind( this ),
4909                         'propertychange change click mouseup keydown keyup input cut paste select focus':
4910                                 OO.ui.debounce( this.updateInputSize.bind( this ) ),
4911                         keydown: this.onInputKeyDown.bind( this ),
4912                         keypress: this.onInputKeyPress.bind( this )
4913                 };
4914
4915                 this.input.$input.on( inputEvents );
4916
4917                 if ( this.inputPosition === 'outline' ) {
4918                         // Override max-height for the input widget
4919                         // in the case the widget is outline so it can
4920                         // stretch all the way if the widet is wide
4921                         this.input.$element.css( 'max-width', 'inherit' );
4922                         this.$element
4923                                 .addClass( 'oo-ui-tagMultiselectWidget-outlined' )
4924                                 .append( this.input.$element );
4925                 } else {
4926                         this.$element.addClass( 'oo-ui-tagMultiselectWidget-inlined' );
4927                         // HACK: When the widget is using 'inline' input, the
4928                         // behavior needs to only use the $input itself
4929                         // so we style and size it accordingly (otherwise
4930                         // the styling and sizing can get very convoluted
4931                         // when the wrapping divs and other elements)
4932                         // We are taking advantage of still being able to
4933                         // call the widget itself for operations like
4934                         // .getValue() and setDisabled() and .focus() but
4935                         // having only the $input attached to the DOM
4936                         this.$content.append( this.input.$input );
4937                 }
4938         } else {
4939                 this.$content.append( $tabFocus );
4940         }
4941
4942         this.setTabIndexedElement(
4943                 this.hasInput ?
4944                         this.input.$input :
4945                         $tabFocus
4946         );
4947
4948         if ( config.selected ) {
4949                 this.setValue( config.selected );
4950         }
4951
4952         // HACK: Input size needs to be calculated after everything
4953         // else is rendered
4954         rAF( function () {
4955                 if ( widget.hasInput ) {
4956                         widget.updateInputSize();
4957                 }
4958         } );
4959 };
4960
4961 /* Initialization */
4962
4963 OO.inheritClass( OO.ui.TagMultiselectWidget, OO.ui.Widget );
4964 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.GroupWidget );
4965 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.DraggableGroupElement );
4966 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.IndicatorElement );
4967 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.IconElement );
4968 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.TabIndexedElement );
4969 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.FlaggedElement );
4970
4971 /* Static properties */
4972
4973 /**
4974  * Allowed input positions.
4975  * - inline: The input is inside the tag list
4976  * - outline: The input is under the tag list
4977  * - none: There is no input
4978  *
4979  * @property {Array}
4980  */
4981 OO.ui.TagMultiselectWidget.static.allowedInputPositions = [ 'inline', 'outline', 'none' ];
4982
4983 /* Methods */
4984
4985 /**
4986  * Handle mouse down events.
4987  *
4988  * @private
4989  * @param {jQuery.Event} e Mouse down event
4990  * @return {boolean} False to prevent defaults
4991  */
4992 OO.ui.TagMultiselectWidget.prototype.onMouseDown = function ( e ) {
4993         if (
4994                 !this.isDisabled() &&
4995                 ( !this.hasInput || e.target !== this.input.$input[ 0 ] ) &&
4996                 e.which === OO.ui.MouseButtons.LEFT
4997         ) {
4998                 this.focus();
4999                 return false;
5000         }
5001 };
5002
5003 /**
5004  * Handle key press events.
5005  *
5006  * @private
5007  * @param {jQuery.Event} e Key press event
5008  * @return {boolean} Whether to prevent defaults
5009  */
5010 OO.ui.TagMultiselectWidget.prototype.onInputKeyPress = function ( e ) {
5011         var stopOrContinue,
5012                 withMetaKey = e.metaKey || e.ctrlKey;
5013
5014         if ( !this.isDisabled() ) {
5015                 if ( e.which === OO.ui.Keys.ENTER ) {
5016                         stopOrContinue = this.doInputEnter( e, withMetaKey );
5017                 }
5018
5019                 // Make sure the input gets resized.
5020                 setTimeout( this.updateInputSize.bind( this ), 0 );
5021                 return stopOrContinue;
5022         }
5023 };
5024
5025 /**
5026  * Handle key down events.
5027  *
5028  * @private
5029  * @param {jQuery.Event} e Key down event
5030  * @return {boolean}
5031  */
5032 OO.ui.TagMultiselectWidget.prototype.onInputKeyDown = function ( e ) {
5033         var movement, direction,
5034                 widget = this,
5035                 withMetaKey = e.metaKey || e.ctrlKey,
5036                 isMovementInsideInput = function ( direction ) {
5037                         var inputRange = widget.input.getRange(),
5038                                 inputValue = widget.hasInput && widget.input.getValue();
5039
5040                         if ( direction === 'forwards' && inputRange.to > inputValue.length - 1 ) {
5041                                 return false;
5042                         }
5043
5044                         if ( direction === 'backwards' && inputRange.from <= 0 ) {
5045                                 return false;
5046                         }
5047
5048                         return true;
5049                 };
5050
5051         if ( !this.isDisabled() ) {
5052                 // 'keypress' event is not triggered for Backspace
5053                 if ( e.keyCode === OO.ui.Keys.BACKSPACE ) {
5054                         return this.doInputBackspace( e, withMetaKey );
5055                 } else if ( e.keyCode === OO.ui.Keys.ESCAPE ) {
5056                         return this.doInputEscape( e );
5057                 } else if (
5058                         e.keyCode === OO.ui.Keys.LEFT ||
5059                         e.keyCode === OO.ui.Keys.RIGHT
5060                 ) {
5061                         if ( OO.ui.Element.static.getDir( this.$element ) === 'rtl' ) {
5062                                 movement = {
5063                                         left: 'forwards',
5064                                         right: 'backwards'
5065                                 };
5066                         } else {
5067                                 movement = {
5068                                         left: 'backwards',
5069                                         right: 'forwards'
5070                                 };
5071                         }
5072                         direction = e.keyCode === OO.ui.Keys.LEFT ?
5073                                 movement.left : movement.right;
5074
5075                         if ( !this.hasInput || !isMovementInsideInput( direction ) ) {
5076                                 return this.doInputArrow( e, direction, withMetaKey );
5077                         }
5078                 }
5079         }
5080 };
5081
5082 /**
5083  * Respond to input focus event
5084  */
5085 OO.ui.TagMultiselectWidget.prototype.onInputFocus = function () {
5086         this.$element.addClass( 'oo-ui-tagMultiselectWidget-focus' );
5087 };
5088
5089 /**
5090  * Respond to input blur event
5091  */
5092 OO.ui.TagMultiselectWidget.prototype.onInputBlur = function () {
5093         this.$element.removeClass( 'oo-ui-tagMultiselectWidget-focus' );
5094 };
5095
5096 /**
5097  * Perform an action after the enter key on the input
5098  *
5099  * @param {jQuery.Event} e Event data
5100  * @param {boolean} [withMetaKey] Whether this key was pressed with
5101  * a meta key like 'ctrl'
5102  * @return {boolean} Whether to prevent defaults
5103  */
5104 OO.ui.TagMultiselectWidget.prototype.doInputEnter = function () {
5105         this.addTagFromInput();
5106         return false;
5107 };
5108
5109 /**
5110  * Perform an action responding to the enter key on the input
5111  *
5112  * @param {jQuery.Event} e Event data
5113  * @param {boolean} [withMetaKey] Whether this key was pressed with
5114  * a meta key like 'ctrl'
5115  * @return {boolean} Whether to prevent defaults
5116  */
5117 OO.ui.TagMultiselectWidget.prototype.doInputBackspace = function ( e, withMetaKey ) {
5118         var items, item;
5119
5120         if (
5121                 this.inputPosition === 'inline' &&
5122                 this.input.getValue() === '' &&
5123                 !this.isEmpty()
5124         ) {
5125                 // Delete the last item
5126                 items = this.getItems();
5127                 item = items[ items.length - 1 ];
5128
5129                 if ( !item.isDisabled() && !item.isFixed() ) {
5130                         this.removeItems( [ item ] );
5131                         // If Ctrl/Cmd was pressed, delete item entirely.
5132                         // Otherwise put it into the text field for editing.
5133                         if ( !withMetaKey ) {
5134                                 this.input.setValue( item.getData() );
5135                         }
5136                 }
5137
5138                 return false;
5139         }
5140 };
5141
5142 /**
5143  * Perform an action after the escape key on the input
5144  *
5145  * @param {jQuery.Event} e Event data
5146  */
5147 OO.ui.TagMultiselectWidget.prototype.doInputEscape = function () {
5148         this.clearInput();
5149 };
5150
5151 /**
5152  * Perform an action after the arrow key on the input, select the previous
5153  * item from the input.
5154  * See #getPreviousItem
5155  *
5156  * @param {jQuery.Event} e Event data
5157  * @param {string} direction Direction of the movement; forwards or backwards
5158  * @param {boolean} [withMetaKey] Whether this key was pressed with
5159  *  a meta key like 'ctrl'
5160  */
5161 OO.ui.TagMultiselectWidget.prototype.doInputArrow = function ( e, direction ) {
5162         if (
5163                 this.inputPosition === 'inline' &&
5164                 !this.isEmpty() &&
5165                 direction === 'backwards'
5166         ) {
5167                 // Get previous item
5168                 this.getPreviousItem().focus();
5169         }
5170 };
5171
5172 /**
5173  * Respond to item select event
5174  *
5175  * @param {OO.ui.TagItemWidget} item Selected item
5176  */
5177 OO.ui.TagMultiselectWidget.prototype.onTagSelect = function ( item ) {
5178         if ( this.hasInput && this.allowEditTags && !item.isFixed() ) {
5179                 if ( this.input.getValue() ) {
5180                         this.addTagFromInput();
5181                 }
5182                 // 1. Get the label of the tag into the input
5183                 this.input.setValue( item.getData() );
5184                 // 2. Remove the tag
5185                 this.removeItems( [ item ] );
5186                 // 3. Focus the input
5187                 this.focus();
5188         }
5189 };
5190
5191 /**
5192  * Respond to item fixed state change
5193  *
5194  * @param {OO.ui.TagItemWidget} item Selected item
5195  */
5196 OO.ui.TagMultiselectWidget.prototype.onTagFixed = function ( item ) {
5197         var i,
5198                 items = this.getItems();
5199
5200         // Move item to the end of the static items
5201         for ( i = 0; i < items.length; i++ ) {
5202                 if ( items[ i ] !== item && !items[ i ].isFixed() ) {
5203                         break;
5204                 }
5205         }
5206         this.addItems( item, i );
5207 };
5208 /**
5209  * Respond to change event, where items were added, removed, or cleared.
5210  */
5211 OO.ui.TagMultiselectWidget.prototype.onChangeTags = function () {
5212         this.toggleValid( this.checkValidity() );
5213         if ( this.hasInput ) {
5214                 this.updateInputSize();
5215         }
5216         this.updateIfHeightChanged();
5217 };
5218
5219 /**
5220  * @inheritdoc
5221  */
5222 OO.ui.TagMultiselectWidget.prototype.setDisabled = function ( isDisabled ) {
5223         // Parent method
5224         OO.ui.TagMultiselectWidget.parent.prototype.setDisabled.call( this, isDisabled );
5225
5226         if ( this.hasInput && this.input ) {
5227                 this.input.setDisabled( !!isDisabled );
5228         }
5229
5230         if ( this.items ) {
5231                 this.getItems().forEach( function ( item ) {
5232                         item.setDisabled( !!isDisabled );
5233                 } );
5234         }
5235 };
5236
5237 /**
5238  * Respond to tag remove event
5239  * @param {OO.ui.TagItemWidget} item Removed tag
5240  */
5241 OO.ui.TagMultiselectWidget.prototype.onTagRemove = function ( item ) {
5242         this.removeTagByData( item.getData() );
5243 };
5244
5245 /**
5246  * Respond to navigate event on the tag
5247  *
5248  * @param {OO.ui.TagItemWidget} item Removed tag
5249  * @param {string} direction Direction of movement; 'forwards' or 'backwards'
5250  */
5251 OO.ui.TagMultiselectWidget.prototype.onTagNavigate = function ( item, direction ) {
5252         var firstItem = this.getItems()[ 0 ];
5253
5254         if ( direction === 'forwards' ) {
5255                 this.getNextItem( item ).focus();
5256         } else if ( !this.inputPosition === 'inline' || item !== firstItem ) {
5257                 // If the widget has an inline input, we want to stop at the starting edge
5258                 // of the tags
5259                 this.getPreviousItem( item ).focus();
5260         }
5261 };
5262
5263 /**
5264  * Add tag from input value
5265  */
5266 OO.ui.TagMultiselectWidget.prototype.addTagFromInput = function () {
5267         var val = this.input.getValue(),
5268                 isValid = this.isAllowedData( val );
5269
5270         if ( !val ) {
5271                 return;
5272         }
5273
5274         if ( isValid || this.allowDisplayInvalidTags ) {
5275                 this.addTag( val );
5276                 this.clearInput();
5277                 this.focus();
5278         }
5279 };
5280
5281 /**
5282  * Clear the input
5283  */
5284 OO.ui.TagMultiselectWidget.prototype.clearInput = function () {
5285         this.input.setValue( '' );
5286 };
5287
5288 /**
5289  * Check whether the given value is a duplicate of an existing
5290  * tag already in the list.
5291  *
5292  * @param {string|Object} data Requested value
5293  * @return {boolean} Value is duplicate
5294  */
5295 OO.ui.TagMultiselectWidget.prototype.isDuplicateData = function ( data ) {
5296         return !!this.findItemFromData( data );
5297 };
5298
5299 /**
5300  * Check whether a given value is allowed to be added
5301  *
5302  * @param {string|Object} data Requested value
5303  * @return {boolean} Value is allowed
5304  */
5305 OO.ui.TagMultiselectWidget.prototype.isAllowedData = function ( data ) {
5306         if (
5307                 !this.allowDuplicates &&
5308                 this.isDuplicateData( data )
5309         ) {
5310                 return false;
5311         }
5312
5313         if ( this.allowArbitrary ) {
5314                 return true;
5315         }
5316
5317         // Check with allowed values
5318         if (
5319                 this.getAllowedValues().some( function ( value ) {
5320                         return data === value;
5321                 } )
5322         ) {
5323                 return true;
5324         }
5325
5326         return false;
5327 };
5328
5329 /**
5330  * Get the allowed values list
5331  *
5332  * @return {string[]} Allowed data values
5333  */
5334 OO.ui.TagMultiselectWidget.prototype.getAllowedValues = function () {
5335         return this.allowedValues;
5336 };
5337
5338 /**
5339  * Add a value to the allowed values list
5340  *
5341  * @param {string} value Allowed data value
5342  */
5343 OO.ui.TagMultiselectWidget.prototype.addAllowedValue = function ( value ) {
5344         if ( this.allowedValues.indexOf( value ) === -1 ) {
5345                 this.allowedValues.push( value );
5346         }
5347 };
5348
5349 /**
5350  * Get the datas of the currently selected items
5351  *
5352  * @return {string[]|Object[]} Datas of currently selected items
5353  */
5354 OO.ui.TagMultiselectWidget.prototype.getValue = function () {
5355         return this.getItems()
5356                 .filter( function ( item ) {
5357                         return item.isValid();
5358                 } )
5359                 .map( function ( item ) {
5360                         return item.getData();
5361                 } );
5362 };
5363
5364 /**
5365  * Set the value of this widget by datas.
5366  *
5367  * @param {string|string[]|Object|Object[]} valueObject An object representing the data
5368  *  and label of the value. If the widget allows arbitrary values,
5369  *  the items will be added as-is. Otherwise, the data value will
5370  *  be checked against allowedValues.
5371  *  This object must contain at least a data key. Example:
5372  *  { data: 'foo', label: 'Foo item' }
5373  *  For multiple items, use an array of objects. For example:
5374  *   [
5375  *      { data: 'foo', label: 'Foo item' },
5376  *      { data: 'bar', label: 'Bar item' }
5377  *       ]
5378  *  Value can also be added with plaintext array, for example:
5379  *  [ 'foo', 'bar', 'bla' ] or a single string, like 'foo'
5380  */
5381 OO.ui.TagMultiselectWidget.prototype.setValue = function ( valueObject ) {
5382         valueObject = Array.isArray( valueObject ) ? valueObject : [ valueObject ];
5383
5384         this.clearItems();
5385         valueObject.forEach( function ( obj ) {
5386                 if ( typeof obj === 'string' ) {
5387                         this.addTag( obj );
5388                 } else {
5389                         this.addTag( obj.data, obj.label );
5390                 }
5391         }.bind( this ) );
5392 };
5393
5394 /**
5395  * Add tag to the display area
5396  *
5397  * @param {string|Object} data Tag data
5398  * @param {string} [label] Tag label. If no label is provided, the
5399  *  stringified version of the data will be used instead.
5400  * @return {boolean} Item was added successfully
5401  */
5402 OO.ui.TagMultiselectWidget.prototype.addTag = function ( data, label ) {
5403         var newItemWidget,
5404                 isValid = this.isAllowedData( data );
5405
5406         if ( isValid || this.allowDisplayInvalidTags ) {
5407                 newItemWidget = this.createTagItemWidget( data, label );
5408                 newItemWidget.toggleValid( isValid );
5409                 this.addItems( [ newItemWidget ] );
5410                 return true;
5411         }
5412         return false;
5413 };
5414
5415 /**
5416  * Remove tag by its data property.
5417  *
5418  * @param {string|Object} data Tag data
5419  */
5420 OO.ui.TagMultiselectWidget.prototype.removeTagByData = function ( data ) {
5421         var item = this.findItemFromData( data );
5422
5423         this.removeItems( [ item ] );
5424 };
5425
5426 /**
5427  * Construct a OO.ui.TagItemWidget (or a subclass thereof) from given label and data.
5428  *
5429  * @protected
5430  * @param {string} data Item data
5431  * @param {string} label The label text.
5432  * @return {OO.ui.TagItemWidget}
5433  */
5434 OO.ui.TagMultiselectWidget.prototype.createTagItemWidget = function ( data, label ) {
5435         label = label || data;
5436
5437         return new OO.ui.TagItemWidget( { data: data, label: label } );
5438 };
5439
5440 /**
5441  * Given an item, returns the item after it. If the item is already the
5442  * last item, return `this.input`. If no item is passed, returns the
5443  * very first item.
5444  *
5445  * @protected
5446  * @param {OO.ui.TagItemWidget} [item] Tag item
5447  * @return {OO.ui.Widget} The next widget available.
5448  */
5449 OO.ui.TagMultiselectWidget.prototype.getNextItem = function ( item ) {
5450         var itemIndex = this.items.indexOf( item );
5451
5452         if ( item === undefined || itemIndex === -1 ) {
5453                 return this.items[ 0 ];
5454         }
5455
5456         if ( itemIndex === this.items.length - 1 ) { // Last item
5457                 if ( this.hasInput ) {
5458                         return this.input;
5459                 } else {
5460                         // Return first item
5461                         return this.items[ 0 ];
5462                 }
5463         } else {
5464                 return this.items[ itemIndex + 1 ];
5465         }
5466 };
5467
5468 /**
5469  * Given an item, returns the item before it. If the item is already the
5470  * first item, return `this.input`. If no item is passed, returns the
5471  * very last item.
5472  *
5473  * @protected
5474  * @param {OO.ui.TagItemWidget} [item] Tag item
5475  * @return {OO.ui.Widget} The previous widget available.
5476  */
5477 OO.ui.TagMultiselectWidget.prototype.getPreviousItem = function ( item ) {
5478         var itemIndex = this.items.indexOf( item );
5479
5480         if ( item === undefined || itemIndex === -1 ) {
5481                 return this.items[ this.items.length - 1 ];
5482         }
5483
5484         if ( itemIndex === 0 ) {
5485                 if ( this.hasInput ) {
5486                         return this.input;
5487                 } else {
5488                         // Return the last item
5489                         return this.items[ this.items.length - 1 ];
5490                 }
5491         } else {
5492                 return this.items[ itemIndex - 1 ];
5493         }
5494 };
5495
5496 /**
5497  * Update the dimensions of the text input field to encompass all available area.
5498  * This is especially relevant for when the input is at the edge of a line
5499  * and should get smaller. The usual operation (as an inline-block with min-width)
5500  * does not work in that case, pushing the input downwards to the next line.
5501  *
5502  * @private
5503  */
5504 OO.ui.TagMultiselectWidget.prototype.updateInputSize = function () {
5505         var $lastItem, direction, contentWidth, currentWidth, bestWidth;
5506         if ( this.inputPosition === 'inline' && !this.isDisabled() ) {
5507                 if ( this.input.$input[ 0 ].scrollWidth === 0 ) {
5508                         // Input appears to be attached but not visible.
5509                         // Don't attempt to adjust its size, because our measurements
5510                         // are going to fail anyway.
5511                         return;
5512                 }
5513                 this.input.$input.css( 'width', '1em' );
5514                 $lastItem = this.$group.children().last();
5515                 direction = OO.ui.Element.static.getDir( this.$handle );
5516
5517                 // Get the width of the input with the placeholder text as
5518                 // the value and save it so that we don't keep recalculating
5519                 if (
5520                         this.contentWidthWithPlaceholder === undefined &&
5521                         this.input.getValue() === '' &&
5522                         this.input.$input.attr( 'placeholder' ) !== undefined
5523                 ) {
5524                         this.input.setValue( this.input.$input.attr( 'placeholder' ) );
5525                         this.contentWidthWithPlaceholder = this.input.$input[ 0 ].scrollWidth;
5526                         this.input.setValue( '' );
5527
5528                 }
5529
5530                 // Always keep the input wide enough for the placeholder text
5531                 contentWidth = Math.max(
5532                         this.input.$input[ 0 ].scrollWidth,
5533                         // undefined arguments in Math.max lead to NaN
5534                         ( this.contentWidthWithPlaceholder === undefined ) ?
5535                                 0 : this.contentWidthWithPlaceholder
5536                 );
5537                 currentWidth = this.input.$input.width();
5538
5539                 if ( contentWidth < currentWidth ) {
5540                         this.updateIfHeightChanged();
5541                         // All is fine, don't perform expensive calculations
5542                         return;
5543                 }
5544
5545                 if ( $lastItem.length === 0 ) {
5546                         bestWidth = this.$content.innerWidth();
5547                 } else {
5548                         bestWidth = direction === 'ltr' ?
5549                                 this.$content.innerWidth() - $lastItem.position().left - $lastItem.outerWidth() :
5550                                 $lastItem.position().left;
5551                 }
5552
5553                 // Some safety margin for sanity, because I *really* don't feel like finding out where the few
5554                 // pixels this is off by are coming from.
5555                 bestWidth -= 10;
5556                 if ( contentWidth > bestWidth ) {
5557                         // This will result in the input getting shifted to the next line
5558                         bestWidth = this.$content.innerWidth() - 10;
5559                 }
5560                 this.input.$input.width( Math.floor( bestWidth ) );
5561                 this.updateIfHeightChanged();
5562         } else {
5563                 this.updateIfHeightChanged();
5564         }
5565 };
5566
5567 /**
5568  * Determine if widget height changed, and if so,
5569  * emit the resize event. This is useful for when there are either
5570  * menus or popups attached to the bottom of the widget, to allow
5571  * them to change their positioning in case the widget moved down
5572  * or up.
5573  *
5574  * @private
5575  */
5576 OO.ui.TagMultiselectWidget.prototype.updateIfHeightChanged = function () {
5577         var height = this.$element.height();
5578         if ( height !== this.height ) {
5579                 this.height = height;
5580                 this.emit( 'resize' );
5581         }
5582 };
5583
5584 /**
5585  * Check whether all items in the widget are valid
5586  *
5587  * @return {boolean} Widget is valid
5588  */
5589 OO.ui.TagMultiselectWidget.prototype.checkValidity = function () {
5590         return this.getItems().every( function ( item ) {
5591                 return item.isValid();
5592         } );
5593 };
5594
5595 /**
5596  * Set the valid state of this item
5597  *
5598  * @param {boolean} [valid] Item is valid
5599  * @fires valid
5600  */
5601 OO.ui.TagMultiselectWidget.prototype.toggleValid = function ( valid ) {
5602         valid = valid === undefined ? !this.valid : !!valid;
5603
5604         if ( this.valid !== valid ) {
5605                 this.valid = valid;
5606
5607                 this.setFlags( { invalid: !this.valid } );
5608
5609                 this.emit( 'valid', this.valid );
5610         }
5611 };
5612
5613 /**
5614  * Get the current valid state of the widget
5615  *
5616  * @return {boolean} Widget is valid
5617  */
5618 OO.ui.TagMultiselectWidget.prototype.isValid = function () {
5619         return this.valid;
5620 };
5621
5622 /**
5623  * PopupTagMultiselectWidget is a {@link OO.ui.TagMultiselectWidget OO.ui.TagMultiselectWidget} intended
5624  * to use a popup. The popup can be configured to have a default input to insert values into the widget.
5625  *
5626  *     @example
5627  *     // Example: A basic PopupTagMultiselectWidget.
5628  *     var widget = new OO.ui.PopupTagMultiselectWidget();
5629  *     $( 'body' ).append( widget.$element );
5630  *
5631  *     // Example: A PopupTagMultiselectWidget with an external popup.
5632  *     var popupInput = new OO.ui.TextInputWidget(),
5633  *         widget = new OO.ui.PopupTagMultiselectWidget( {
5634  *            popupInput: popupInput,
5635  *            popup: {
5636  *               $content: popupInput.$element
5637  *            }
5638  *         } );
5639  *     $( 'body' ).append( widget.$element );
5640  *
5641  * @class
5642  * @extends OO.ui.TagMultiselectWidget
5643  * @mixins OO.ui.mixin.PopupElement
5644  *
5645  * @param {Object} config Configuration object
5646  * @cfg {jQuery} [$overlay] An overlay for the popup.
5647  *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
5648  * @cfg {Object} [popup] Configuration options for the popup
5649  * @cfg {OO.ui.InputWidget} [popupInput] An input widget inside the popup that will be
5650  *  focused when the popup is opened and will be used as replacement for the
5651  *  general input in the widget.
5652  */
5653 OO.ui.PopupTagMultiselectWidget = function OoUiPopupTagMultiselectWidget( config ) {
5654         var defaultInput,
5655                 defaultConfig = { popup: {} };
5656
5657         config = config || {};
5658
5659         // Parent constructor
5660         OO.ui.PopupTagMultiselectWidget.parent.call( this, $.extend( { inputPosition: 'none' }, config ) );
5661
5662         this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;
5663
5664         if ( !config.popup ) {
5665                 // For the default base implementation, we give a popup
5666                 // with an input widget inside it. For any other use cases
5667                 // the popup needs to be populated externally and the
5668                 // event handled to add tags separately and manually
5669                 defaultInput = new OO.ui.TextInputWidget();
5670
5671                 defaultConfig.popupInput = defaultInput;
5672                 defaultConfig.popup.$content = defaultInput.$element;
5673                 defaultConfig.popup.padded = true;
5674
5675                 this.$element.addClass( 'oo-ui-popupTagMultiselectWidget-defaultPopup' );
5676         }
5677
5678         // Add overlay, and add that to the autoCloseIgnore
5679         defaultConfig.popup.$overlay = this.$overlay;
5680         defaultConfig.popup.$autoCloseIgnore = this.hasInput ?
5681                 this.input.$element.add( this.$overlay ) : this.$overlay;
5682
5683         // Allow extending any of the above
5684         config = $.extend( defaultConfig, config );
5685
5686         // Mixin constructors
5687         OO.ui.mixin.PopupElement.call( this, config );
5688
5689         if ( this.hasInput ) {
5690                 this.input.$input.on( 'focus', this.popup.toggle.bind( this.popup, true ) );
5691         }
5692
5693         // Configuration options
5694         this.popupInput = config.popupInput;
5695         if ( this.popupInput ) {
5696                 this.popupInput.connect( this, {
5697                         enter: 'onPopupInputEnter'
5698                 } );
5699         }
5700
5701         // Events
5702         this.on( 'resize', this.popup.updateDimensions.bind( this.popup ) );
5703         this.popup.connect( this, { toggle: 'onPopupToggle' } );
5704         this.$tabIndexed
5705                 .on( 'focus', this.onFocus.bind( this ) );
5706
5707         // Initialize
5708         this.$element
5709                 .append( this.popup.$element )
5710                 .addClass( 'oo-ui-popupTagMultiselectWidget' );
5711 };
5712
5713 /* Initialization */
5714
5715 OO.inheritClass( OO.ui.PopupTagMultiselectWidget, OO.ui.TagMultiselectWidget );
5716 OO.mixinClass( OO.ui.PopupTagMultiselectWidget, OO.ui.mixin.PopupElement );
5717
5718 /* Methods */
5719
5720 /**
5721  * Focus event handler.
5722  *
5723  * @private
5724  */
5725 OO.ui.PopupTagMultiselectWidget.prototype.onFocus = function () {
5726         this.popup.toggle( true );
5727 };
5728
5729 /**
5730  * Respond to popup toggle event
5731  *
5732  * @param {boolean} isVisible Popup is visible
5733  */
5734 OO.ui.PopupTagMultiselectWidget.prototype.onPopupToggle = function ( isVisible ) {
5735         if ( isVisible && this.popupInput ) {
5736                 this.popupInput.focus();
5737         }
5738 };
5739
5740 /**
5741  * Respond to popup input enter event
5742  */
5743 OO.ui.PopupTagMultiselectWidget.prototype.onPopupInputEnter = function () {
5744         if ( this.popupInput ) {
5745                 this.addTagByPopupValue( this.popupInput.getValue() );
5746                 this.popupInput.setValue( '' );
5747         }
5748 };
5749
5750 /**
5751  * @inheritdoc
5752  */
5753 OO.ui.PopupTagMultiselectWidget.prototype.onTagSelect = function ( item ) {
5754         if ( this.popupInput && this.allowEditTags ) {
5755                 this.popupInput.setValue( item.getData() );
5756                 this.removeItems( [ item ] );
5757
5758                 this.popup.toggle( true );
5759                 this.popupInput.focus();
5760         } else {
5761                 // Parent
5762                 OO.ui.PopupTagMultiselectWidget.parent.prototype.onTagSelect.call( this, item );
5763         }
5764 };
5765
5766 /**
5767  * Add a tag by the popup value.
5768  * Whatever is responsible for setting the value in the popup should call
5769  * this method to add a tag, or use the regular methods like #addTag or
5770  * #setValue directly.
5771  *
5772  * @param {string} data The value of item
5773  * @param {string} [label] The label of the tag. If not given, the data is used.
5774  */
5775 OO.ui.PopupTagMultiselectWidget.prototype.addTagByPopupValue = function ( data, label ) {
5776         this.addTag( data, label );
5777 };
5778
5779 /**
5780  * MenuTagMultiselectWidget is a {@link OO.ui.TagMultiselectWidget OO.ui.TagMultiselectWidget} intended
5781  * to use a menu of selectable options.
5782  *
5783  *     @example
5784  *     // Example: A basic MenuTagMultiselectWidget.
5785  *     var widget = new OO.ui.MenuTagMultiselectWidget( {
5786  *         inputPosition: 'outline',
5787  *         options: [
5788  *            { data: 'option1', label: 'Option 1', icon: 'tag' },
5789  *            { data: 'option2', label: 'Option 2' },
5790  *            { data: 'option3', label: 'Option 3' },
5791  *         ],
5792  *         selected: [ 'option1', 'option2' ]
5793  *     } );
5794  *     $( 'body' ).append( widget.$element );
5795  *
5796  * @class
5797  * @extends OO.ui.TagMultiselectWidget
5798  *
5799  * @constructor
5800  * @param {Object} [config] Configuration object
5801  * @cfg {boolean} [clearInputOnChoose=true] Clear the text input value when a menu option is chosen
5802  * @cfg {Object} [menu] Configuration object for the menu widget
5803  * @cfg {jQuery} [$overlay] An overlay for the menu.
5804  *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
5805  * @cfg {Object[]} [options=[]] Array of menu options in the format `{ data: …, label: … }`
5806  */
5807 OO.ui.MenuTagMultiselectWidget = function OoUiMenuTagMultiselectWidget( config ) {
5808         config = config || {};
5809
5810         // Parent constructor
5811         OO.ui.MenuTagMultiselectWidget.parent.call( this, config );
5812
5813         this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;
5814         this.clearInputOnChoose = config.clearInputOnChoose === undefined || !!config.clearInputOnChoose;
5815         this.menu = this.createMenuWidget( $.extend( {
5816                 widget: this,
5817                 input: this.hasInput ? this.input : null,
5818                 $input: this.hasInput ? this.input.$input : null,
5819                 filterFromInput: !!this.hasInput,
5820                 $autoCloseIgnore: this.hasInput ?
5821                         this.input.$element : $( [] ),
5822                 $floatableContainer: this.hasInput && this.inputPosition === 'outline' ?
5823                         this.input.$element : this.$element,
5824                 $overlay: this.$overlay,
5825                 disabled: this.isDisabled()
5826         }, config.menu ) );
5827         this.addOptions( config.options || [] );
5828
5829         // Events
5830         this.menu.connect( this, {
5831                 choose: 'onMenuChoose',
5832                 toggle: 'onMenuToggle'
5833         } );
5834         if ( this.hasInput ) {
5835                 this.input.connect( this, { change: 'onInputChange' } );
5836         }
5837         this.connect( this, { resize: 'onResize' } );
5838
5839         // Initialization
5840         this.$overlay
5841                 .append( this.menu.$element );
5842         this.$element
5843                 .addClass( 'oo-ui-menuTagMultiselectWidget' );
5844         // TagMultiselectWidget already does this, but it doesn't work right because this.menu is not yet
5845         // set up while the parent constructor runs, and #getAllowedValues rejects everything.
5846         if ( config.selected ) {
5847                 this.setValue( config.selected );
5848         }
5849 };
5850
5851 /* Initialization */
5852
5853 OO.inheritClass( OO.ui.MenuTagMultiselectWidget, OO.ui.TagMultiselectWidget );
5854
5855 /* Methods */
5856
5857 /**
5858  * Respond to resize event
5859  */
5860 OO.ui.MenuTagMultiselectWidget.prototype.onResize = function () {
5861         // Reposition the menu
5862         this.menu.position();
5863 };
5864
5865 /**
5866  * @inheritdoc
5867  */
5868 OO.ui.MenuTagMultiselectWidget.prototype.onInputFocus = function () {
5869         // Parent method
5870         OO.ui.MenuTagMultiselectWidget.parent.prototype.onInputFocus.call( this );
5871
5872         this.menu.toggle( true );
5873 };
5874
5875 /**
5876  * Respond to input change event
5877  */
5878 OO.ui.MenuTagMultiselectWidget.prototype.onInputChange = function () {
5879         this.menu.toggle( true );
5880         this.initializeMenuSelection();
5881 };
5882
5883 /**
5884  * Respond to menu choose event
5885  *
5886  * @param {OO.ui.OptionWidget} menuItem Chosen menu item
5887  */
5888 OO.ui.MenuTagMultiselectWidget.prototype.onMenuChoose = function ( menuItem ) {
5889         // Add tag
5890         this.addTag( menuItem.getData(), menuItem.getLabel() );
5891         if ( this.hasInput && this.clearInputOnChoose ) {
5892                 this.input.setValue( '' );
5893         }
5894 };
5895
5896 /**
5897  * Respond to menu toggle event. Reset item highlights on hide.
5898  *
5899  * @param {boolean} isVisible The menu is visible
5900  */
5901 OO.ui.MenuTagMultiselectWidget.prototype.onMenuToggle = function ( isVisible ) {
5902         if ( !isVisible ) {
5903                 this.menu.selectItem( null );
5904                 this.menu.highlightItem( null );
5905         } else {
5906                 this.initializeMenuSelection();
5907         }
5908 };
5909
5910 /**
5911  * @inheritdoc
5912  */
5913 OO.ui.MenuTagMultiselectWidget.prototype.onTagSelect = function ( tagItem ) {
5914         var menuItem = this.menu.findItemFromData( tagItem.getData() );
5915         if ( !this.allowArbitrary ) {
5916                 // Override the base behavior from TagMultiselectWidget; the base behavior
5917                 // in TagMultiselectWidget is to remove the tag to edit it in the input,
5918                 // but in our case, we want to utilize the menu selection behavior, and
5919                 // definitely not remove the item.
5920
5921                 // If there is an input that is used for filtering, erase the value so we don't filter
5922                 if ( this.hasInput && this.menu.filterFromInput ) {
5923                         this.input.setValue( '' );
5924                 }
5925
5926                 // Select the menu item
5927                 this.menu.selectItem( menuItem );
5928
5929                 this.focus();
5930         } else {
5931                 // Use the default
5932                 OO.ui.MenuTagMultiselectWidget.parent.prototype.onTagSelect.call( this, tagItem );
5933         }
5934 };
5935
5936 /**
5937  * Highlight the first selectable item in the menu, if configured.
5938  *
5939  * @private
5940  * @chainable
5941  */
5942 OO.ui.MenuTagMultiselectWidget.prototype.initializeMenuSelection = function () {
5943         if ( !this.menu.findSelectedItem() ) {
5944                 this.menu.highlightItem( this.menu.findFirstSelectableItem() );
5945         }
5946 };
5947
5948 /**
5949  * @inheritdoc
5950  */
5951 OO.ui.MenuTagMultiselectWidget.prototype.addTagFromInput = function () {
5952         var inputValue = this.input.getValue(),
5953                 validated = false,
5954                 highlightedItem = this.menu.findHighlightedItem(),
5955                 item = this.menu.findItemFromData( inputValue );
5956
5957         if ( !inputValue ) {
5958                 return;
5959         }
5960
5961         // Override the parent method so we add from the menu
5962         // rather than directly from the input
5963
5964         // Look for a highlighted item first
5965         if ( highlightedItem ) {
5966                 validated = this.addTag( highlightedItem.getData(), highlightedItem.getLabel() );
5967         } else if ( item ) {
5968                 // Look for the element that fits the data
5969                 validated = this.addTag( item.getData(), item.getLabel() );
5970         } else {
5971                 // Otherwise, add the tag - the method will only add if the
5972                 // tag is valid or if invalid tags are allowed
5973                 validated = this.addTag( inputValue );
5974         }
5975
5976         if ( validated ) {
5977                 this.clearInput();
5978                 this.focus();
5979         }
5980 };
5981
5982 /**
5983  * Return the visible items in the menu. This is mainly used for when
5984  * the menu is filtering results.
5985  *
5986  * @return {OO.ui.MenuOptionWidget[]} Visible results
5987  */
5988 OO.ui.MenuTagMultiselectWidget.prototype.getMenuVisibleItems = function () {
5989         return this.menu.getItems().filter( function ( menuItem ) {
5990                 return menuItem.isVisible();
5991         } );
5992 };
5993
5994 /**
5995  * Create the menu for this widget. This is in a separate method so that
5996  * child classes can override this without polluting the constructor with
5997  * unnecessary extra objects that will be overidden.
5998  *
5999  * @param {Object} menuConfig Configuration options
6000  * @return {OO.ui.MenuSelectWidget} Menu widget
6001  */
6002 OO.ui.MenuTagMultiselectWidget.prototype.createMenuWidget = function ( menuConfig ) {
6003         return new OO.ui.MenuSelectWidget( menuConfig );
6004 };
6005
6006 /**
6007  * Add options to the menu
6008  *
6009  * @param {Object[]} menuOptions Object defining options
6010  */
6011 OO.ui.MenuTagMultiselectWidget.prototype.addOptions = function ( menuOptions ) {
6012         var widget = this,
6013                 items = menuOptions.map( function ( obj ) {
6014                         return widget.createMenuOptionWidget( obj.data, obj.label, obj.icon );
6015                 } );
6016
6017         this.menu.addItems( items );
6018 };
6019
6020 /**
6021  * Create a menu option widget.
6022  *
6023  * @param {string} data Item data
6024  * @param {string} [label] Item label
6025  * @param {string} [icon] Symbolic icon name
6026  * @return {OO.ui.OptionWidget} Option widget
6027  */
6028 OO.ui.MenuTagMultiselectWidget.prototype.createMenuOptionWidget = function ( data, label, icon ) {
6029         return new OO.ui.MenuOptionWidget( {
6030                 data: data,
6031                 label: label || data,
6032                 icon: icon
6033         } );
6034 };
6035
6036 /**
6037  * Get the menu
6038  *
6039  * @return {OO.ui.MenuSelectWidget} Menu
6040  */
6041 OO.ui.MenuTagMultiselectWidget.prototype.getMenu = function () {
6042         return this.menu;
6043 };
6044
6045 /**
6046  * Get the allowed values list
6047  *
6048  * @return {string[]} Allowed data values
6049  */
6050 OO.ui.MenuTagMultiselectWidget.prototype.getAllowedValues = function () {
6051         var menuDatas = [];
6052         if ( this.menu ) {
6053                 // If the parent constructor is calling us, we're not ready yet, this.menu is not set up.
6054                 menuDatas = this.menu.getItems().map( function ( menuItem ) {
6055                         return menuItem.getData();
6056                 } );
6057         }
6058         return this.allowedValues.concat( menuDatas );
6059 };
6060
6061 /**
6062  * SelectFileWidgets allow for selecting files, using the HTML5 File API. These
6063  * widgets can be configured with {@link OO.ui.mixin.IconElement icons} and {@link
6064  * OO.ui.mixin.IndicatorElement indicators}.
6065  * Please see the [OOUI documentation on MediaWiki] [1] for more information and examples.
6066  *
6067  *     @example
6068  *     // Example of a file select widget
6069  *     var selectFile = new OO.ui.SelectFileWidget();
6070  *     $( 'body' ).append( selectFile.$element );
6071  *
6072  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets
6073  *
6074  * @class
6075  * @extends OO.ui.Widget
6076  * @mixins OO.ui.mixin.IconElement
6077  * @mixins OO.ui.mixin.IndicatorElement
6078  * @mixins OO.ui.mixin.PendingElement
6079  * @mixins OO.ui.mixin.LabelElement
6080  *
6081  * @constructor
6082  * @param {Object} [config] Configuration options
6083  * @cfg {string[]|null} [accept=null] MIME types to accept. null accepts all types.
6084  * @cfg {string} [placeholder] Text to display when no file is selected.
6085  * @cfg {string} [notsupported] Text to display when file support is missing in the browser.
6086  * @cfg {boolean} [droppable=true] Whether to accept files by drag and drop.
6087  * @cfg {boolean} [showDropTarget=false] Whether to show a drop target. Requires droppable to be true.
6088  * @cfg {number} [thumbnailSizeLimit=20] File size limit in MiB above which to not try and show a
6089  *  preview (for performance)
6090  */
6091 OO.ui.SelectFileWidget = function OoUiSelectFileWidget( config ) {
6092         var dragHandler;
6093
6094         // Configuration initialization
6095         config = $.extend( {
6096                 accept: null,
6097                 placeholder: OO.ui.msg( 'ooui-selectfile-placeholder' ),
6098                 notsupported: OO.ui.msg( 'ooui-selectfile-not-supported' ),
6099                 droppable: true,
6100                 showDropTarget: false,
6101                 thumbnailSizeLimit: 20
6102         }, config );
6103
6104         // Parent constructor
6105         OO.ui.SelectFileWidget.parent.call( this, config );
6106
6107         // Mixin constructors
6108         OO.ui.mixin.IconElement.call( this, config );
6109         OO.ui.mixin.IndicatorElement.call( this, config );
6110         OO.ui.mixin.PendingElement.call( this, $.extend( {}, config, { $pending: this.$info } ) );
6111         OO.ui.mixin.LabelElement.call( this, config );
6112
6113         // Properties
6114         this.$info = $( '<span>' );
6115         this.showDropTarget = config.showDropTarget;
6116         this.thumbnailSizeLimit = config.thumbnailSizeLimit;
6117         this.isSupported = this.constructor.static.isSupported();
6118         this.currentFile = null;
6119         if ( Array.isArray( config.accept ) ) {
6120                 this.accept = config.accept;
6121         } else {
6122                 this.accept = null;
6123         }
6124         this.placeholder = config.placeholder;
6125         this.notsupported = config.notsupported;
6126         this.onFileSelectedHandler = this.onFileSelected.bind( this );
6127
6128         this.selectButton = new OO.ui.ButtonWidget( {
6129                 $element: $( '<label>' ),
6130                 classes: [ 'oo-ui-selectFileWidget-selectButton' ],
6131                 label: OO.ui.msg( 'ooui-selectfile-button-select' ),
6132                 disabled: this.disabled || !this.isSupported
6133         } );
6134
6135         this.clearButton = new OO.ui.ButtonWidget( {
6136                 classes: [ 'oo-ui-selectFileWidget-clearButton' ],
6137                 framed: false,
6138                 icon: 'close',
6139                 disabled: this.disabled
6140         } );
6141
6142         // Events
6143         this.selectButton.$button.on( {
6144                 keypress: this.onKeyPress.bind( this )
6145         } );
6146         this.clearButton.connect( this, {
6147                 click: 'onClearClick'
6148         } );
6149         if ( config.droppable ) {
6150                 dragHandler = this.onDragEnterOrOver.bind( this );
6151                 this.$element.on( {
6152                         dragenter: dragHandler,
6153                         dragover: dragHandler,
6154                         dragleave: this.onDragLeave.bind( this ),
6155                         drop: this.onDrop.bind( this )
6156                 } );
6157         }
6158
6159         // Initialization
6160         this.addInput();
6161         this.$label.addClass( 'oo-ui-selectFileWidget-label' );
6162         this.$info
6163                 .addClass( 'oo-ui-selectFileWidget-info' )
6164                 .append( this.$icon, this.$label, this.clearButton.$element, this.$indicator );
6165
6166         if ( config.droppable && config.showDropTarget ) {
6167                 this.selectButton.setIcon( 'upload' );
6168                 this.$thumbnail = $( '<div>' ).addClass( 'oo-ui-selectFileWidget-thumbnail' );
6169                 this.setPendingElement( this.$thumbnail );
6170                 this.$element
6171                         .addClass( 'oo-ui-selectFileWidget-dropTarget oo-ui-selectFileWidget' )
6172                         .on( {
6173                                 click: this.onDropTargetClick.bind( this )
6174                         } )
6175                         .append(
6176                                 this.$thumbnail,
6177                                 this.$info,
6178                                 this.selectButton.$element,
6179                                 $( '<span>' )
6180                                         .addClass( 'oo-ui-selectFileWidget-dropLabel' )
6181                                         .text( OO.ui.msg( 'ooui-selectfile-dragdrop-placeholder' ) )
6182                         );
6183         } else {
6184                 this.$element
6185                         .addClass( 'oo-ui-selectFileWidget' )
6186                         .append( this.$info, this.selectButton.$element );
6187         }
6188         this.updateUI();
6189 };
6190
6191 /* Setup */
6192
6193 OO.inheritClass( OO.ui.SelectFileWidget, OO.ui.Widget );
6194 OO.mixinClass( OO.ui.SelectFileWidget, OO.ui.mixin.IconElement );
6195 OO.mixinClass( OO.ui.SelectFileWidget, OO.ui.mixin.IndicatorElement );
6196 OO.mixinClass( OO.ui.SelectFileWidget, OO.ui.mixin.PendingElement );
6197 OO.mixinClass( OO.ui.SelectFileWidget, OO.ui.mixin.LabelElement );
6198
6199 /* Static Properties */
6200
6201 /**
6202  * Check if this widget is supported
6203  *
6204  * @static
6205  * @return {boolean}
6206  */
6207 OO.ui.SelectFileWidget.static.isSupported = function () {
6208         var $input;
6209         if ( OO.ui.SelectFileWidget.static.isSupportedCache === null ) {
6210                 $input = $( '<input>' ).attr( 'type', 'file' );
6211                 OO.ui.SelectFileWidget.static.isSupportedCache = $input[ 0 ].files !== undefined;
6212         }
6213         return OO.ui.SelectFileWidget.static.isSupportedCache;
6214 };
6215
6216 OO.ui.SelectFileWidget.static.isSupportedCache = null;
6217
6218 /* Events */
6219
6220 /**
6221  * @event change
6222  *
6223  * A change event is emitted when the on/off state of the toggle changes.
6224  *
6225  * @param {File|null} value New value
6226  */
6227
6228 /* Methods */
6229
6230 /**
6231  * Get the current value of the field
6232  *
6233  * @return {File|null}
6234  */
6235 OO.ui.SelectFileWidget.prototype.getValue = function () {
6236         return this.currentFile;
6237 };
6238
6239 /**
6240  * Set the current value of the field
6241  *
6242  * @param {File|null} file File to select
6243  */
6244 OO.ui.SelectFileWidget.prototype.setValue = function ( file ) {
6245         if ( this.currentFile !== file ) {
6246                 this.currentFile = file;
6247                 this.updateUI();
6248                 this.emit( 'change', this.currentFile );
6249         }
6250 };
6251
6252 /**
6253  * Focus the widget.
6254  *
6255  * Focusses the select file button.
6256  *
6257  * @chainable
6258  */
6259 OO.ui.SelectFileWidget.prototype.focus = function () {
6260         this.selectButton.focus();
6261         return this;
6262 };
6263
6264 /**
6265  * Blur the widget.
6266  *
6267  * @chainable
6268  */
6269 OO.ui.SelectFileWidget.prototype.blur = function () {
6270         this.selectButton.blur();
6271         return this;
6272 };
6273
6274 /**
6275  * @inheritdoc
6276  */
6277 OO.ui.SelectFileWidget.prototype.simulateLabelClick = function () {
6278         this.focus();
6279 };
6280
6281 /**
6282  * Update the user interface when a file is selected or unselected
6283  *
6284  * @protected
6285  */
6286 OO.ui.SelectFileWidget.prototype.updateUI = function () {
6287         var $label;
6288         if ( !this.isSupported ) {
6289                 this.$element.addClass( 'oo-ui-selectFileWidget-notsupported' );
6290                 this.$element.removeClass( 'oo-ui-selectFileWidget-empty' );
6291                 this.setLabel( this.notsupported );
6292         } else {
6293                 this.$element.addClass( 'oo-ui-selectFileWidget-supported' );
6294                 if ( this.currentFile ) {
6295                         this.$element.removeClass( 'oo-ui-selectFileWidget-empty' );
6296                         $label = $( [] );
6297                         $label = $label.add(
6298                                 $( '<span>' )
6299                                         .addClass( 'oo-ui-selectFileWidget-fileName' )
6300                                         .text( this.currentFile.name )
6301                         );
6302                         this.setLabel( $label );
6303
6304                         if ( this.showDropTarget ) {
6305                                 this.pushPending();
6306                                 this.loadAndGetImageUrl().done( function ( url ) {
6307                                         this.$thumbnail.css( 'background-image', 'url( ' + url + ' )' );
6308                                 }.bind( this ) ).fail( function () {
6309                                         this.$thumbnail.append(
6310                                                 new OO.ui.IconWidget( {
6311                                                         icon: 'attachment',
6312                                                         classes: [ 'oo-ui-selectFileWidget-noThumbnail-icon' ]
6313                                                 } ).$element
6314                                         );
6315                                 }.bind( this ) ).always( function () {
6316                                         this.popPending();
6317                                 }.bind( this ) );
6318                                 this.$element.off( 'click' );
6319                         }
6320                 } else {
6321                         if ( this.showDropTarget ) {
6322                                 this.$element.off( 'click' );
6323                                 this.$element.on( {
6324                                         click: this.onDropTargetClick.bind( this )
6325                                 } );
6326                                 this.$thumbnail
6327                                         .empty()
6328                                         .css( 'background-image', '' );
6329                         }
6330                         this.$element.addClass( 'oo-ui-selectFileWidget-empty' );
6331                         this.setLabel( this.placeholder );
6332                 }
6333         }
6334 };
6335
6336 /**
6337  * If the selected file is an image, get its URL and load it.
6338  *
6339  * @return {jQuery.Promise} Promise resolves with the image URL after it has loaded
6340  */
6341 OO.ui.SelectFileWidget.prototype.loadAndGetImageUrl = function () {
6342         var deferred = $.Deferred(),
6343                 file = this.currentFile,
6344                 reader = new FileReader();
6345
6346         if (
6347                 file &&
6348                 ( OO.getProp( file, 'type' ) || '' ).indexOf( 'image/' ) === 0 &&
6349                 file.size < this.thumbnailSizeLimit * 1024 * 1024
6350         ) {
6351                 reader.onload = function ( event ) {
6352                         var img = document.createElement( 'img' );
6353                         img.addEventListener( 'load', function () {
6354                                 if (
6355                                         img.naturalWidth === 0 ||
6356                                         img.naturalHeight === 0 ||
6357                                         img.complete === false
6358                                 ) {
6359                                         deferred.reject();
6360                                 } else {
6361                                         deferred.resolve( event.target.result );
6362                                 }
6363                         } );
6364                         img.src = event.target.result;
6365                 };
6366                 reader.readAsDataURL( file );
6367         } else {
6368                 deferred.reject();
6369         }
6370
6371         return deferred.promise();
6372 };
6373
6374 /**
6375  * Add the input to the widget
6376  *
6377  * @private
6378  */
6379 OO.ui.SelectFileWidget.prototype.addInput = function () {
6380         if ( this.$input ) {
6381                 this.$input.remove();
6382         }
6383
6384         if ( !this.isSupported ) {
6385                 this.$input = null;
6386                 return;
6387         }
6388
6389         this.$input = $( '<input>' ).attr( 'type', 'file' );
6390         this.$input.on( 'change', this.onFileSelectedHandler );
6391         this.$input.on( 'click', function ( e ) {
6392                 // Prevents dropTarget to get clicked which calls
6393                 // a click on this input
6394                 e.stopPropagation();
6395         } );
6396         this.$input.attr( {
6397                 tabindex: -1
6398         } );
6399         if ( this.accept ) {
6400                 this.$input.attr( 'accept', this.accept.join( ', ' ) );
6401         }
6402         this.selectButton.$button.append( this.$input );
6403 };
6404
6405 /**
6406  * Determine if we should accept this file
6407  *
6408  * @private
6409  * @param {string} mimeType File MIME type
6410  * @return {boolean}
6411  */
6412 OO.ui.SelectFileWidget.prototype.isAllowedType = function ( mimeType ) {
6413         var i, mimeTest;
6414
6415         if ( !this.accept || !mimeType ) {
6416                 return true;
6417         }
6418
6419         for ( i = 0; i < this.accept.length; i++ ) {
6420                 mimeTest = this.accept[ i ];
6421                 if ( mimeTest === mimeType ) {
6422                         return true;
6423                 } else if ( mimeTest.substr( -2 ) === '/*' ) {
6424                         mimeTest = mimeTest.substr( 0, mimeTest.length - 1 );
6425                         if ( mimeType.substr( 0, mimeTest.length ) === mimeTest ) {
6426                                 return true;
6427                         }
6428                 }
6429         }
6430
6431         return false;
6432 };
6433
6434 /**
6435  * Handle file selection from the input
6436  *
6437  * @private
6438  * @param {jQuery.Event} e
6439  */
6440 OO.ui.SelectFileWidget.prototype.onFileSelected = function ( e ) {
6441         var file = OO.getProp( e.target, 'files', 0 ) || null;
6442
6443         if ( file && !this.isAllowedType( file.type ) ) {
6444                 file = null;
6445         }
6446
6447         this.setValue( file );
6448         this.addInput();
6449 };
6450
6451 /**
6452  * Handle clear button click events.
6453  *
6454  * @private
6455  */
6456 OO.ui.SelectFileWidget.prototype.onClearClick = function () {
6457         this.setValue( null );
6458         return false;
6459 };
6460
6461 /**
6462  * Handle key press events.
6463  *
6464  * @private
6465  * @param {jQuery.Event} e Key press event
6466  */
6467 OO.ui.SelectFileWidget.prototype.onKeyPress = function ( e ) {
6468         if ( this.isSupported && !this.isDisabled() && this.$input &&
6469                 ( e.which === OO.ui.Keys.SPACE || e.which === OO.ui.Keys.ENTER )
6470         ) {
6471                 this.$input.click();
6472                 return false;
6473         }
6474 };
6475
6476 /**
6477  * Handle drop target click events.
6478  *
6479  * @private
6480  * @param {jQuery.Event} e Key press event
6481  */
6482 OO.ui.SelectFileWidget.prototype.onDropTargetClick = function () {
6483         if ( this.isSupported && !this.isDisabled() && this.$input ) {
6484                 this.$input.click();
6485                 return false;
6486         }
6487 };
6488
6489 /**
6490  * Handle drag enter and over events
6491  *
6492  * @private
6493  * @param {jQuery.Event} e Drag event
6494  */
6495 OO.ui.SelectFileWidget.prototype.onDragEnterOrOver = function ( e ) {
6496         var itemOrFile,
6497                 droppableFile = false,
6498                 dt = e.originalEvent.dataTransfer;
6499
6500         e.preventDefault();
6501         e.stopPropagation();
6502
6503         if ( this.isDisabled() || !this.isSupported ) {
6504                 this.$element.removeClass( 'oo-ui-selectFileWidget-canDrop' );
6505                 dt.dropEffect = 'none';
6506                 return false;
6507         }
6508
6509         // DataTransferItem and File both have a type property, but in Chrome files
6510         // have no information at this point.
6511         itemOrFile = OO.getProp( dt, 'items', 0 ) || OO.getProp( dt, 'files', 0 );
6512         if ( itemOrFile ) {
6513                 if ( this.isAllowedType( itemOrFile.type ) ) {
6514                         droppableFile = true;
6515                 }
6516         // dt.types is Array-like, but not an Array
6517         } else if ( Array.prototype.indexOf.call( OO.getProp( dt, 'types' ) || [], 'Files' ) !== -1 ) {
6518                 // File information is not available at this point for security so just assume
6519                 // it is acceptable for now.
6520                 // https://bugzilla.mozilla.org/show_bug.cgi?id=640534
6521                 droppableFile = true;
6522         }
6523
6524         this.$element.toggleClass( 'oo-ui-selectFileWidget-canDrop', droppableFile );
6525         if ( !droppableFile ) {
6526                 dt.dropEffect = 'none';
6527         }
6528
6529         return false;
6530 };
6531
6532 /**
6533  * Handle drag leave events
6534  *
6535  * @private
6536  * @param {jQuery.Event} e Drag event
6537  */
6538 OO.ui.SelectFileWidget.prototype.onDragLeave = function () {
6539         this.$element.removeClass( 'oo-ui-selectFileWidget-canDrop' );
6540 };
6541
6542 /**
6543  * Handle drop events
6544  *
6545  * @private
6546  * @param {jQuery.Event} e Drop event
6547  */
6548 OO.ui.SelectFileWidget.prototype.onDrop = function ( e ) {
6549         var file = null,
6550                 dt = e.originalEvent.dataTransfer;
6551
6552         e.preventDefault();
6553         e.stopPropagation();
6554         this.$element.removeClass( 'oo-ui-selectFileWidget-canDrop' );
6555
6556         if ( this.isDisabled() || !this.isSupported ) {
6557                 return false;
6558         }
6559
6560         file = OO.getProp( dt, 'files', 0 );
6561         if ( file && !this.isAllowedType( file.type ) ) {
6562                 file = null;
6563         }
6564         if ( file ) {
6565                 this.setValue( file );
6566         }
6567
6568         return false;
6569 };
6570
6571 /**
6572  * @inheritdoc
6573  */
6574 OO.ui.SelectFileWidget.prototype.setDisabled = function ( disabled ) {
6575         OO.ui.SelectFileWidget.parent.prototype.setDisabled.call( this, disabled );
6576         if ( this.selectButton ) {
6577                 this.selectButton.setDisabled( disabled );
6578         }
6579         if ( this.clearButton ) {
6580                 this.clearButton.setDisabled( disabled );
6581         }
6582         return this;
6583 };
6584
6585 /**
6586  * SearchWidgets combine a {@link OO.ui.TextInputWidget text input field}, where users can type a search query,
6587  * and a menu of search results, which is displayed beneath the query
6588  * field. Unlike {@link OO.ui.mixin.LookupElement lookup menus}, search result menus are always visible to the user.
6589  * Users can choose an item from the menu or type a query into the text field to search for a matching result item.
6590  * In general, search widgets are used inside a separate {@link OO.ui.Dialog dialog} window.
6591  *
6592  * Each time the query is changed, the search result menu is cleared and repopulated. Please see
6593  * the [OOUI demos][1] for an example.
6594  *
6595  * [1]: https://doc.wikimedia.org/oojs-ui/master/demos/#SearchInputWidget-type-search
6596  *
6597  * @class
6598  * @extends OO.ui.Widget
6599  *
6600  * @constructor
6601  * @param {Object} [config] Configuration options
6602  * @cfg {string|jQuery} [placeholder] Placeholder text for query input
6603  * @cfg {string} [value] Initial query value
6604  */
6605 OO.ui.SearchWidget = function OoUiSearchWidget( config ) {
6606         // Configuration initialization
6607         config = config || {};
6608
6609         // Parent constructor
6610         OO.ui.SearchWidget.parent.call( this, config );
6611
6612         // Properties
6613         this.query = new OO.ui.TextInputWidget( {
6614                 icon: 'search',
6615                 placeholder: config.placeholder,
6616                 value: config.value
6617         } );
6618         this.results = new OO.ui.SelectWidget();
6619         this.$query = $( '<div>' );
6620         this.$results = $( '<div>' );
6621
6622         // Events
6623         this.query.connect( this, {
6624                 change: 'onQueryChange',
6625                 enter: 'onQueryEnter'
6626         } );
6627         this.query.$input.on( 'keydown', this.onQueryKeydown.bind( this ) );
6628
6629         // Initialization
6630         this.$query
6631                 .addClass( 'oo-ui-searchWidget-query' )
6632                 .append( this.query.$element );
6633         this.$results
6634                 .addClass( 'oo-ui-searchWidget-results' )
6635                 .append( this.results.$element );
6636         this.$element
6637                 .addClass( 'oo-ui-searchWidget' )
6638                 .append( this.$results, this.$query );
6639 };
6640
6641 /* Setup */
6642
6643 OO.inheritClass( OO.ui.SearchWidget, OO.ui.Widget );
6644
6645 /* Methods */
6646
6647 /**
6648  * Handle query key down events.
6649  *
6650  * @private
6651  * @param {jQuery.Event} e Key down event
6652  */
6653 OO.ui.SearchWidget.prototype.onQueryKeydown = function ( e ) {
6654         var highlightedItem, nextItem,
6655                 dir = e.which === OO.ui.Keys.DOWN ? 1 : ( e.which === OO.ui.Keys.UP ? -1 : 0 );
6656
6657         if ( dir ) {
6658                 highlightedItem = this.results.findHighlightedItem();
6659                 if ( !highlightedItem ) {
6660                         highlightedItem = this.results.findSelectedItem();
6661                 }
6662                 nextItem = this.results.findRelativeSelectableItem( highlightedItem, dir );
6663                 this.results.highlightItem( nextItem );
6664                 nextItem.scrollElementIntoView();
6665         }
6666 };
6667
6668 /**
6669  * Handle select widget select events.
6670  *
6671  * Clears existing results. Subclasses should repopulate items according to new query.
6672  *
6673  * @private
6674  * @param {string} value New value
6675  */
6676 OO.ui.SearchWidget.prototype.onQueryChange = function () {
6677         // Reset
6678         this.results.clearItems();
6679 };
6680
6681 /**
6682  * Handle select widget enter key events.
6683  *
6684  * Chooses highlighted item.
6685  *
6686  * @private
6687  * @param {string} value New value
6688  */
6689 OO.ui.SearchWidget.prototype.onQueryEnter = function () {
6690         var highlightedItem = this.results.findHighlightedItem();
6691         if ( highlightedItem ) {
6692                 this.results.chooseItem( highlightedItem );
6693         }
6694 };
6695
6696 /**
6697  * Get the query input.
6698  *
6699  * @return {OO.ui.TextInputWidget} Query input
6700  */
6701 OO.ui.SearchWidget.prototype.getQuery = function () {
6702         return this.query;
6703 };
6704
6705 /**
6706  * Get the search results menu.
6707  *
6708  * @return {OO.ui.SelectWidget} Menu of search results
6709  */
6710 OO.ui.SearchWidget.prototype.getResults = function () {
6711         return this.results;
6712 };
6713
6714 }( OO ) );
6715
6716 //# sourceMappingURL=oojs-ui-widgets.js.map.json