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

   1 /*!
   2  * OOUI v0.27.6
   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: 2018-08-01T22:17:59Z
  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
1007                 .addClass( 'oo-ui-tabPanelLayout' )
1008                 .attr( 'role', 'tabpanel' );
1009 };
1010
1011 /* Setup */
1012
1013 OO.inheritClass( OO.ui.TabPanelLayout, OO.ui.PanelLayout );
1014
1015 /* Events */
1016
1017 /**
1018  * An 'active' event is emitted when the tab panel becomes active. Tab panels become active when they are
1019  * shown in a index layout that is configured to display only one tab panel at a time.
1020  *
1021  * @event active
1022  * @param {boolean} active Tab panel is active
1023  */
1024
1025 /* Methods */
1026
1027 /**
1028  * Get the symbolic name of the tab panel.
1029  *
1030  * @return {string} Symbolic name of tab panel
1031  */
1032 OO.ui.TabPanelLayout.prototype.getName = function () {
1033         return this.name;
1034 };
1035
1036 /**
1037  * Check if tab panel is active.
1038  *
1039  * Tab panels become active when they are shown in a {@link OO.ui.IndexLayout index layout} that is configured to
1040  * display only one tab panel at a time. Additional CSS is applied to the tab panel's tab item to reflect the
1041  * active state.
1042  *
1043  * @return {boolean} Tab panel is active
1044  */
1045 OO.ui.TabPanelLayout.prototype.isActive = function () {
1046         return this.active;
1047 };
1048
1049 /**
1050  * Get tab item.
1051  *
1052  * The tab item allows users to access the tab panel from the index's tab
1053  * navigation. The tab item itself can be customized (with a label, level, etc.) using the #setupTabItem method.
1054  *
1055  * @return {OO.ui.TabOptionWidget|null} Tab option widget
1056  */
1057 OO.ui.TabPanelLayout.prototype.getTabItem = function () {
1058         return this.tabItem;
1059 };
1060
1061 /**
1062  * Set or unset the tab item.
1063  *
1064  * Specify a {@link OO.ui.TabOptionWidget tab option} to set it,
1065  * or `null` to clear the tab item. To customize the tab item itself (e.g., to set a label or tab
1066  * level), use #setupTabItem instead of this method.
1067  *
1068  * @param {OO.ui.TabOptionWidget|null} tabItem Tab option widget, null to clear
1069  * @chainable
1070  */
1071 OO.ui.TabPanelLayout.prototype.setTabItem = function ( tabItem ) {
1072         this.tabItem = tabItem || null;
1073         if ( tabItem ) {
1074                 this.setupTabItem();
1075         }
1076         return this;
1077 };
1078
1079 /**
1080  * Set up the tab item.
1081  *
1082  * Use this method to customize the tab item (e.g., to add a label or tab level). To set or unset
1083  * the tab item itself (with a {@link OO.ui.TabOptionWidget tab option} or `null`), use
1084  * the #setTabItem method instead.
1085  *
1086  * @param {OO.ui.TabOptionWidget} tabItem Tab option widget to set up
1087  * @chainable
1088  */
1089 OO.ui.TabPanelLayout.prototype.setupTabItem = function () {
1090         this.$element.attr( 'aria-labelledby', this.tabItem.getElementId() );
1091
1092         this.tabItem.$element.attr( 'aria-controls', this.getElementId() );
1093
1094         if ( this.label ) {
1095                 this.tabItem.setLabel( this.label );
1096         }
1097         return this;
1098 };
1099
1100 /**
1101  * Set the tab panel to its 'active' state.
1102  *
1103  * Tab panels become active when they are shown in a index layout that is configured to display only
1104  * one tab panel at a time. Additional CSS is applied to the tab item to reflect the tab panel's
1105  * active state. Outside of the index context, setting the active state on a tab panel does nothing.
1106  *
1107  * @param {boolean} active Tab panel is active
1108  * @fires active
1109  */
1110 OO.ui.TabPanelLayout.prototype.setActive = function ( active ) {
1111         active = !!active;
1112
1113         if ( active !== this.active ) {
1114                 this.active = active;
1115                 this.$element.toggleClass( 'oo-ui-tabPanelLayout-active', this.active );
1116                 this.emit( 'active', this.active );
1117         }
1118 };
1119
1120 /**
1121  * PageLayouts are used within {@link OO.ui.BookletLayout booklet layouts} to create pages that users can select and display
1122  * from the booklet's optional {@link OO.ui.OutlineSelectWidget outline} navigation. Pages are usually not instantiated directly,
1123  * rather extended to include the required content and functionality.
1124  *
1125  * Each page must have a unique symbolic name, which is passed to the constructor. In addition, the page's outline
1126  * item is customized (with a label, outline level, etc.) using the #setupOutlineItem method. See
1127  * {@link OO.ui.BookletLayout BookletLayout} for an example.
1128  *
1129  * @class
1130  * @extends OO.ui.PanelLayout
1131  *
1132  * @constructor
1133  * @param {string} name Unique symbolic name of page
1134  * @param {Object} [config] Configuration options
1135  */
1136 OO.ui.PageLayout = function OoUiPageLayout( name, config ) {
1137         // Allow passing positional parameters inside the config object
1138         if ( OO.isPlainObject( name ) && config === undefined ) {
1139                 config = name;
1140                 name = config.name;
1141         }
1142
1143         // Configuration initialization
1144         config = $.extend( { scrollable: true }, config );
1145
1146         // Parent constructor
1147         OO.ui.PageLayout.parent.call( this, config );
1148
1149         // Properties
1150         this.name = name;
1151         this.outlineItem = null;
1152         this.active = false;
1153
1154         // Initialization
1155         this.$element.addClass( 'oo-ui-pageLayout' );
1156 };
1157
1158 /* Setup */
1159
1160 OO.inheritClass( OO.ui.PageLayout, OO.ui.PanelLayout );
1161
1162 /* Events */
1163
1164 /**
1165  * An 'active' event is emitted when the page becomes active. Pages become active when they are
1166  * shown in a booklet layout that is configured to display only one page at a time.
1167  *
1168  * @event active
1169  * @param {boolean} active Page is active
1170  */
1171
1172 /* Methods */
1173
1174 /**
1175  * Get the symbolic name of the page.
1176  *
1177  * @return {string} Symbolic name of page
1178  */
1179 OO.ui.PageLayout.prototype.getName = function () {
1180         return this.name;
1181 };
1182
1183 /**
1184  * Check if page is active.
1185  *
1186  * Pages become active when they are shown in a {@link OO.ui.BookletLayout booklet layout} that is configured to display
1187  * only one page at a time. Additional CSS is applied to the page's outline item to reflect the active state.
1188  *
1189  * @return {boolean} Page is active
1190  */
1191 OO.ui.PageLayout.prototype.isActive = function () {
1192         return this.active;
1193 };
1194
1195 /**
1196  * Get outline item.
1197  *
1198  * The outline item allows users to access the page from the booklet's outline
1199  * navigation. The outline item itself can be customized (with a label, level, etc.) using the #setupOutlineItem method.
1200  *
1201  * @return {OO.ui.OutlineOptionWidget|null} Outline option widget
1202  */
1203 OO.ui.PageLayout.prototype.getOutlineItem = function () {
1204         return this.outlineItem;
1205 };
1206
1207 /**
1208  * Set or unset the outline item.
1209  *
1210  * Specify an {@link OO.ui.OutlineOptionWidget outline option} to set it,
1211  * or `null` to clear the outline item. To customize the outline item itself (e.g., to set a label or outline
1212  * level), use #setupOutlineItem instead of this method.
1213  *
1214  * @param {OO.ui.OutlineOptionWidget|null} outlineItem Outline option widget, null to clear
1215  * @chainable
1216  */
1217 OO.ui.PageLayout.prototype.setOutlineItem = function ( outlineItem ) {
1218         this.outlineItem = outlineItem || null;
1219         if ( outlineItem ) {
1220                 this.setupOutlineItem();
1221         }
1222         return this;
1223 };
1224
1225 /**
1226  * Set up the outline item.
1227  *
1228  * Use this method to customize the outline item (e.g., to add a label or outline level). To set or unset
1229  * the outline item itself (with an {@link OO.ui.OutlineOptionWidget outline option} or `null`), use
1230  * the #setOutlineItem method instead.
1231  *
1232  * @param {OO.ui.OutlineOptionWidget} outlineItem Outline option widget to set up
1233  * @chainable
1234  */
1235 OO.ui.PageLayout.prototype.setupOutlineItem = function () {
1236         return this;
1237 };
1238
1239 /**
1240  * Set the page to its 'active' state.
1241  *
1242  * Pages become active when they are shown in a booklet layout that is configured to display only one page at a time. Additional
1243  * CSS is applied to the outline item to reflect the page's active state. Outside of the booklet
1244  * context, setting the active state on a page does nothing.
1245  *
1246  * @param {boolean} active Page is active
1247  * @fires active
1248  */
1249 OO.ui.PageLayout.prototype.setActive = function ( active ) {
1250         active = !!active;
1251
1252         if ( active !== this.active ) {
1253                 this.active = active;
1254                 this.$element.toggleClass( 'oo-ui-pageLayout-active', active );
1255                 this.emit( 'active', this.active );
1256         }
1257 };
1258
1259 /**
1260  * StackLayouts contain a series of {@link OO.ui.PanelLayout panel layouts}. By default, only one panel is displayed
1261  * at a time, though the stack layout can also be configured to show all contained panels, one after another,
1262  * by setting the #continuous option to 'true'.
1263  *
1264  *     @example
1265  *     // A stack layout with two panels, configured to be displayed continously
1266  *     var myStack = new OO.ui.StackLayout( {
1267  *         items: [
1268  *             new OO.ui.PanelLayout( {
1269  *                 $content: $( '<p>Panel One</p>' ),
1270  *                 padded: true,
1271  *                 framed: true
1272  *             } ),
1273  *             new OO.ui.PanelLayout( {
1274  *                 $content: $( '<p>Panel Two</p>' ),
1275  *                 padded: true,
1276  *                 framed: true
1277  *             } )
1278  *         ],
1279  *         continuous: true
1280  *     } );
1281  *     $( 'body' ).append( myStack.$element );
1282  *
1283  * @class
1284  * @extends OO.ui.PanelLayout
1285  * @mixins OO.ui.mixin.GroupElement
1286  *
1287  * @constructor
1288  * @param {Object} [config] Configuration options
1289  * @cfg {boolean} [continuous=false] Show all panels, one after another. By default, only one panel is displayed at a time.
1290  * @cfg {OO.ui.Layout[]} [items] Panel layouts to add to the stack layout.
1291  */
1292 OO.ui.StackLayout = function OoUiStackLayout( config ) {
1293         // Configuration initialization
1294         config = $.extend( { scrollable: true }, config );
1295
1296         // Parent constructor
1297         OO.ui.StackLayout.parent.call( this, config );
1298
1299         // Mixin constructors
1300         OO.ui.mixin.GroupElement.call( this, $.extend( {}, config, { $group: this.$element } ) );
1301
1302         // Properties
1303         this.currentItem = null;
1304         this.continuous = !!config.continuous;
1305
1306         // Initialization
1307         this.$element.addClass( 'oo-ui-stackLayout' );
1308         if ( this.continuous ) {
1309                 this.$element.addClass( 'oo-ui-stackLayout-continuous' );
1310                 this.$element.on( 'scroll', OO.ui.debounce( this.onScroll.bind( this ), 250 ) );
1311         }
1312         if ( Array.isArray( config.items ) ) {
1313                 this.addItems( config.items );
1314         }
1315 };
1316
1317 /* Setup */
1318
1319 OO.inheritClass( OO.ui.StackLayout, OO.ui.PanelLayout );
1320 OO.mixinClass( OO.ui.StackLayout, OO.ui.mixin.GroupElement );
1321
1322 /* Events */
1323
1324 /**
1325  * A 'set' event is emitted when panels are {@link #addItems added}, {@link #removeItems removed},
1326  * {@link #clearItems cleared} or {@link #setItem displayed}.
1327  *
1328  * @event set
1329  * @param {OO.ui.Layout|null} item Current panel or `null` if no panel is shown
1330  */
1331
1332 /**
1333  * When used in continuous mode, this event is emitted when the user scrolls down
1334  * far enough such that currentItem is no longer visible.
1335  *
1336  * @event visibleItemChange
1337  * @param {OO.ui.PanelLayout} panel The next visible item in the layout
1338  */
1339
1340 /* Methods */
1341
1342 /**
1343  * Handle scroll events from the layout element
1344  *
1345  * @param {jQuery.Event} e
1346  * @fires visibleItemChange
1347  */
1348 OO.ui.StackLayout.prototype.onScroll = function () {
1349         var currentRect,
1350                 len = this.items.length,
1351                 currentIndex = this.items.indexOf( this.currentItem ),
1352                 newIndex = currentIndex,
1353                 containerRect = this.$element[ 0 ].getBoundingClientRect();
1354
1355         if ( !containerRect || ( !containerRect.top && !containerRect.bottom ) ) {
1356                 // Can't get bounding rect, possibly not attached.
1357                 return;
1358         }
1359
1360         function getRect( item ) {
1361                 return item.$element[ 0 ].getBoundingClientRect();
1362         }
1363
1364         function isVisible( item ) {
1365                 var rect = getRect( item );
1366                 return rect.bottom > containerRect.top && rect.top < containerRect.bottom;
1367         }
1368
1369         currentRect = getRect( this.currentItem );
1370
1371         if ( currentRect.bottom < containerRect.top ) {
1372                 // Scrolled down past current item
1373                 while ( ++newIndex < len ) {
1374                         if ( isVisible( this.items[ newIndex ] ) ) {
1375                                 break;
1376                         }
1377                 }
1378         } else if ( currentRect.top > containerRect.bottom ) {
1379                 // Scrolled up past current item
1380                 while ( --newIndex >= 0 ) {
1381                         if ( isVisible( this.items[ newIndex ] ) ) {
1382                                 break;
1383                         }
1384                 }
1385         }
1386
1387         if ( newIndex !== currentIndex ) {
1388                 this.emit( 'visibleItemChange', this.items[ newIndex ] );
1389         }
1390 };
1391
1392 /**
1393  * Get the current panel.
1394  *
1395  * @return {OO.ui.Layout|null}
1396  */
1397 OO.ui.StackLayout.prototype.getCurrentItem = function () {
1398         return this.currentItem;
1399 };
1400
1401 /**
1402  * Unset the current item.
1403  *
1404  * @private
1405  * @param {OO.ui.StackLayout} layout
1406  * @fires set
1407  */
1408 OO.ui.StackLayout.prototype.unsetCurrentItem = function () {
1409         var prevItem = this.currentItem;
1410         if ( prevItem === null ) {
1411                 return;
1412         }
1413
1414         this.currentItem = null;
1415         this.emit( 'set', null );
1416 };
1417
1418 /**
1419  * Add panel layouts to the stack layout.
1420  *
1421  * Panels will be added to the end of the stack layout array unless the optional index parameter specifies a different
1422  * insertion point. Adding a panel that is already in the stack will move it to the end of the array or the point specified
1423  * by the index.
1424  *
1425  * @param {OO.ui.Layout[]} items Panels to add
1426  * @param {number} [index] Index of the insertion point
1427  * @chainable
1428  */
1429 OO.ui.StackLayout.prototype.addItems = function ( items, index ) {
1430         // Update the visibility
1431         this.updateHiddenState( items, this.currentItem );
1432
1433         // Mixin method
1434         OO.ui.mixin.GroupElement.prototype.addItems.call( this, items, index );
1435
1436         if ( !this.currentItem && items.length ) {
1437                 this.setItem( items[ 0 ] );
1438         }
1439
1440         return this;
1441 };
1442
1443 /**
1444  * Remove the specified panels from the stack layout.
1445  *
1446  * Removed panels are detached from the DOM, not removed, so that they may be reused. To remove all panels,
1447  * you may wish to use the #clearItems method instead.
1448  *
1449  * @param {OO.ui.Layout[]} items Panels to remove
1450  * @chainable
1451  * @fires set
1452  */
1453 OO.ui.StackLayout.prototype.removeItems = function ( items ) {
1454         // Mixin method
1455         OO.ui.mixin.GroupElement.prototype.removeItems.call( this, items );
1456
1457         if ( items.indexOf( this.currentItem ) !== -1 ) {
1458                 if ( this.items.length ) {
1459                         this.setItem( this.items[ 0 ] );
1460                 } else {
1461                         this.unsetCurrentItem();
1462                 }
1463         }
1464
1465         return this;
1466 };
1467
1468 /**
1469  * Clear all panels from the stack layout.
1470  *
1471  * Cleared panels are detached from the DOM, not removed, so that they may be reused. To remove only
1472  * a subset of panels, use the #removeItems method.
1473  *
1474  * @chainable
1475  * @fires set
1476  */
1477 OO.ui.StackLayout.prototype.clearItems = function () {
1478         this.unsetCurrentItem();
1479         OO.ui.mixin.GroupElement.prototype.clearItems.call( this );
1480
1481         return this;
1482 };
1483
1484 /**
1485  * Show the specified panel.
1486  *
1487  * If another panel is currently displayed, it will be hidden.
1488  *
1489  * @param {OO.ui.Layout} item Panel to show
1490  * @chainable
1491  * @fires set
1492  */
1493 OO.ui.StackLayout.prototype.setItem = function ( item ) {
1494         if ( item !== this.currentItem ) {
1495                 this.updateHiddenState( this.items, item );
1496
1497                 if ( this.items.indexOf( item ) !== -1 ) {
1498                         this.currentItem = item;
1499                         this.emit( 'set', item );
1500                 } else {
1501                         this.unsetCurrentItem();
1502                 }
1503         }
1504
1505         return this;
1506 };
1507
1508 /**
1509  * Update the visibility of all items in case of non-continuous view.
1510  *
1511  * Ensure all items are hidden except for the selected one.
1512  * This method does nothing when the stack is continuous.
1513  *
1514  * @private
1515  * @param {OO.ui.Layout[]} items Item list iterate over
1516  * @param {OO.ui.Layout} [selectedItem] Selected item to show
1517  */
1518 OO.ui.StackLayout.prototype.updateHiddenState = function ( items, selectedItem ) {
1519         var i, len;
1520
1521         if ( !this.continuous ) {
1522                 for ( i = 0, len = items.length; i < len; i++ ) {
1523                         if ( !selectedItem || selectedItem !== items[ i ] ) {
1524                                 items[ i ].$element.addClass( 'oo-ui-element-hidden' );
1525                                 items[ i ].$element.attr( 'aria-hidden', 'true' );
1526                         }
1527                 }
1528                 if ( selectedItem ) {
1529                         selectedItem.$element.removeClass( 'oo-ui-element-hidden' );
1530                         selectedItem.$element.removeAttr( 'aria-hidden' );
1531                 }
1532         }
1533 };
1534
1535 /**
1536  * MenuLayouts combine a menu and a content {@link OO.ui.PanelLayout panel}. The menu is positioned relative to the content (after, before, top, or bottom)
1537  * and its size is customized with the #menuSize config. The content area will fill all remaining space.
1538  *
1539  *     @example
1540  *     var menuLayout = new OO.ui.MenuLayout( {
1541  *         position: 'top'
1542  *     } ),
1543  *         menuPanel = new OO.ui.PanelLayout( { padded: true, expanded: true, scrollable: true } ),
1544  *         contentPanel = new OO.ui.PanelLayout( { padded: true, expanded: true, scrollable: true } ),
1545  *         select = new OO.ui.SelectWidget( {
1546  *             items: [
1547  *                 new OO.ui.OptionWidget( {
1548  *                     data: 'before',
1549  *                     label: 'Before',
1550  *                 } ),
1551  *                 new OO.ui.OptionWidget( {
1552  *                     data: 'after',
1553  *                     label: 'After',
1554  *                 } ),
1555  *                 new OO.ui.OptionWidget( {
1556  *                     data: 'top',
1557  *                     label: 'Top',
1558  *                 } ),
1559  *                 new OO.ui.OptionWidget( {
1560  *                     data: 'bottom',
1561  *                     label: 'Bottom',
1562  *                 } )
1563  *              ]
1564  *         } ).on( 'select', function ( item ) {
1565  *            menuLayout.setMenuPosition( item.getData() );
1566  *         } );
1567  *
1568  *     menuLayout.$menu.append(
1569  *         menuPanel.$element.append( '<b>Menu panel</b>', select.$element )
1570  *     );
1571  *     menuLayout.$content.append(
1572  *         contentPanel.$element.append( '<b>Content panel</b>', '<p>Note that the menu is positioned relative to the content panel: top, bottom, after, before.</p>')
1573  *     );
1574  *     $( 'body' ).append( menuLayout.$element );
1575  *
1576  * If menu size needs to be overridden, it can be accomplished using CSS similar to the snippet
1577  * below. MenuLayout's CSS will override the appropriate values with 'auto' or '0' to display the
1578  * menu correctly. If `menuPosition` is known beforehand, CSS rules corresponding to other positions
1579  * may be omitted.
1580  *
1581  *     .oo-ui-menuLayout-menu {
1582  *         height: 200px;
1583  *         width: 200px;
1584  *     }
1585  *     .oo-ui-menuLayout-content {
1586  *         top: 200px;
1587  *         left: 200px;
1588  *         right: 200px;
1589  *         bottom: 200px;
1590  *     }
1591  *
1592  * @class
1593  * @extends OO.ui.Layout
1594  *
1595  * @constructor
1596  * @param {Object} [config] Configuration options
1597  * @cfg {boolean} [expanded=true] Expand the layout to fill the entire parent element.
1598  * @cfg {boolean} [showMenu=true] Show menu
1599  * @cfg {string} [menuPosition='before'] Position of menu: `top`, `after`, `bottom` or `before`
1600  */
1601 OO.ui.MenuLayout = function OoUiMenuLayout( config ) {
1602         // Configuration initialization
1603         config = $.extend( {
1604                 expanded: true,
1605                 showMenu: true,
1606                 menuPosition: 'before'
1607         }, config );
1608
1609         // Parent constructor
1610         OO.ui.MenuLayout.parent.call( this, config );
1611
1612         this.expanded = !!config.expanded;
1613         /**
1614          * Menu DOM node
1615          *
1616          * @property {jQuery}
1617          */
1618         this.$menu = $( '<div>' );
1619         /**
1620          * Content DOM node
1621          *
1622          * @property {jQuery}
1623          */
1624         this.$content = $( '<div>' );
1625
1626         // Initialization
1627         this.$menu
1628                 .addClass( 'oo-ui-menuLayout-menu' );
1629         this.$content.addClass( 'oo-ui-menuLayout-content' );
1630         this.$element
1631                 .addClass( 'oo-ui-menuLayout' );
1632         if ( config.expanded ) {
1633                 this.$element.addClass( 'oo-ui-menuLayout-expanded' );
1634         } else {
1635                 this.$element.addClass( 'oo-ui-menuLayout-static' );
1636         }
1637         this.setMenuPosition( config.menuPosition );
1638         this.toggleMenu( config.showMenu );
1639 };
1640
1641 /* Setup */
1642
1643 OO.inheritClass( OO.ui.MenuLayout, OO.ui.Layout );
1644
1645 /* Methods */
1646
1647 /**
1648  * Toggle menu.
1649  *
1650  * @param {boolean} showMenu Show menu, omit to toggle
1651  * @chainable
1652  */
1653 OO.ui.MenuLayout.prototype.toggleMenu = function ( showMenu ) {
1654         showMenu = showMenu === undefined ? !this.showMenu : !!showMenu;
1655
1656         if ( this.showMenu !== showMenu ) {
1657                 this.showMenu = showMenu;
1658                 this.$element
1659                         .toggleClass( 'oo-ui-menuLayout-showMenu', this.showMenu )
1660                         .toggleClass( 'oo-ui-menuLayout-hideMenu', !this.showMenu );
1661                 this.$menu.attr( 'aria-hidden', this.showMenu ? 'false' : 'true' );
1662         }
1663
1664         return this;
1665 };
1666
1667 /**
1668  * Check if menu is visible
1669  *
1670  * @return {boolean} Menu is visible
1671  */
1672 OO.ui.MenuLayout.prototype.isMenuVisible = function () {
1673         return this.showMenu;
1674 };
1675
1676 /**
1677  * Set menu position.
1678  *
1679  * @param {string} position Position of menu, either `top`, `after`, `bottom` or `before`
1680  * @throws {Error} If position value is not supported
1681  * @chainable
1682  */
1683 OO.ui.MenuLayout.prototype.setMenuPosition = function ( position ) {
1684         this.$element.removeClass( 'oo-ui-menuLayout-' + this.menuPosition );
1685         this.menuPosition = position;
1686         if ( this.menuPosition === 'top' || this.menuPosition === 'before' ) {
1687                 this.$element.append( this.$menu, this.$content );
1688         } else {
1689                 this.$element.append( this.$content, this.$menu );
1690         }
1691         this.$element.addClass( 'oo-ui-menuLayout-' + position );
1692
1693         return this;
1694 };
1695
1696 /**
1697  * Get menu position.
1698  *
1699  * @return {string} Menu position
1700  */
1701 OO.ui.MenuLayout.prototype.getMenuPosition = function () {
1702         return this.menuPosition;
1703 };
1704
1705 /**
1706  * BookletLayouts contain {@link OO.ui.PageLayout page layouts} as well as
1707  * an {@link OO.ui.OutlineSelectWidget outline} that allows users to easily navigate
1708  * through the pages and select which one to display. By default, only one page is
1709  * displayed at a time and the outline is hidden. When a user navigates to a new page,
1710  * the booklet layout automatically focuses on the first focusable element, unless the
1711  * default setting is changed. Optionally, booklets can be configured to show
1712  * {@link OO.ui.OutlineControlsWidget controls} for adding, moving, and removing items.
1713  *
1714  *     @example
1715  *     // Example of a BookletLayout that contains two PageLayouts.
1716  *
1717  *     function PageOneLayout( name, config ) {
1718  *         PageOneLayout.parent.call( this, name, config );
1719  *         this.$element.append( '<p>First page</p><p>(This booklet has an outline, displayed on the left)</p>' );
1720  *     }
1721  *     OO.inheritClass( PageOneLayout, OO.ui.PageLayout );
1722  *     PageOneLayout.prototype.setupOutlineItem = function () {
1723  *         this.outlineItem.setLabel( 'Page One' );
1724  *     };
1725  *
1726  *     function PageTwoLayout( name, config ) {
1727  *         PageTwoLayout.parent.call( this, name, config );
1728  *         this.$element.append( '<p>Second page</p>' );
1729  *     }
1730  *     OO.inheritClass( PageTwoLayout, OO.ui.PageLayout );
1731  *     PageTwoLayout.prototype.setupOutlineItem = function () {
1732  *         this.outlineItem.setLabel( 'Page Two' );
1733  *     };
1734  *
1735  *     var page1 = new PageOneLayout( 'one' ),
1736  *         page2 = new PageTwoLayout( 'two' );
1737  *
1738  *     var booklet = new OO.ui.BookletLayout( {
1739  *         outlined: true
1740  *     } );
1741  *
1742  *     booklet.addPages ( [ page1, page2 ] );
1743  *     $( 'body' ).append( booklet.$element );
1744  *
1745  * @class
1746  * @extends OO.ui.MenuLayout
1747  *
1748  * @constructor
1749  * @param {Object} [config] Configuration options
1750  * @cfg {boolean} [continuous=false] Show all pages, one after another
1751  * @cfg {boolean} [autoFocus=true] Focus on the first focusable element when a new page is displayed. Disabled on mobile.
1752  * @cfg {boolean} [outlined=false] Show the outline. The outline is used to navigate through the pages of the booklet.
1753  * @cfg {boolean} [editable=false] Show controls for adding, removing and reordering pages
1754  */
1755 OO.ui.BookletLayout = function OoUiBookletLayout( config ) {
1756         // Configuration initialization
1757         config = config || {};
1758
1759         // Parent constructor
1760         OO.ui.BookletLayout.parent.call( this, config );
1761
1762         // Properties
1763         this.currentPageName = null;
1764         this.pages = {};
1765         this.ignoreFocus = false;
1766         this.stackLayout = new OO.ui.StackLayout( {
1767                 continuous: !!config.continuous,
1768                 expanded: this.expanded
1769         } );
1770         this.$content.append( this.stackLayout.$element );
1771         this.autoFocus = config.autoFocus === undefined || !!config.autoFocus;
1772         this.outlineVisible = false;
1773         this.outlined = !!config.outlined;
1774         if ( this.outlined ) {
1775                 this.editable = !!config.editable;
1776                 this.outlineControlsWidget = null;
1777                 this.outlineSelectWidget = new OO.ui.OutlineSelectWidget();
1778                 this.outlinePanel = new OO.ui.PanelLayout( {
1779                         expanded: this.expanded,
1780                         scrollable: true
1781                 } );
1782                 this.$menu.append( this.outlinePanel.$element );
1783                 this.outlineVisible = true;
1784                 if ( this.editable ) {
1785                         this.outlineControlsWidget = new OO.ui.OutlineControlsWidget(
1786                                 this.outlineSelectWidget
1787                         );
1788                 }
1789         }
1790         this.toggleMenu( this.outlined );
1791
1792         // Events
1793         this.stackLayout.connect( this, { set: 'onStackLayoutSet' } );
1794         if ( this.outlined ) {
1795                 this.outlineSelectWidget.connect( this, { select: 'onOutlineSelectWidgetSelect' } );
1796                 this.scrolling = false;
1797                 this.stackLayout.connect( this, { visibleItemChange: 'onStackLayoutVisibleItemChange' } );
1798         }
1799         if ( this.autoFocus ) {
1800                 // Event 'focus' does not bubble, but 'focusin' does
1801                 this.stackLayout.$element.on( 'focusin', this.onStackLayoutFocus.bind( this ) );
1802         }
1803
1804         // Initialization
1805         this.$element.addClass( 'oo-ui-bookletLayout' );
1806         this.stackLayout.$element.addClass( 'oo-ui-bookletLayout-stackLayout' );
1807         if ( this.outlined ) {
1808                 this.outlinePanel.$element
1809                         .addClass( 'oo-ui-bookletLayout-outlinePanel' )
1810                         .append( this.outlineSelectWidget.$element );
1811                 if ( this.editable ) {
1812                         this.outlinePanel.$element
1813                                 .addClass( 'oo-ui-bookletLayout-outlinePanel-editable' )
1814                                 .append( this.outlineControlsWidget.$element );
1815                 }
1816         }
1817 };
1818
1819 /* Setup */
1820
1821 OO.inheritClass( OO.ui.BookletLayout, OO.ui.MenuLayout );
1822
1823 /* Events */
1824
1825 /**
1826  * A 'set' event is emitted when a page is {@link #setPage set} to be displayed by the booklet layout.
1827  * @event set
1828  * @param {OO.ui.PageLayout} page Current page
1829  */
1830
1831 /**
1832  * An 'add' event is emitted when pages are {@link #addPages added} to the booklet layout.
1833  *
1834  * @event add
1835  * @param {OO.ui.PageLayout[]} page Added pages
1836  * @param {number} index Index pages were added at
1837  */
1838
1839 /**
1840  * A 'remove' event is emitted when pages are {@link #clearPages cleared} or
1841  * {@link #removePages removed} from the booklet.
1842  *
1843  * @event remove
1844  * @param {OO.ui.PageLayout[]} pages Removed pages
1845  */
1846
1847 /* Methods */
1848
1849 /**
1850  * Handle stack layout focus.
1851  *
1852  * @private
1853  * @param {jQuery.Event} e Focusin event
1854  */
1855 OO.ui.BookletLayout.prototype.onStackLayoutFocus = function ( e ) {
1856         var name, $target;
1857
1858         // Find the page that an element was focused within
1859         $target = $( e.target ).closest( '.oo-ui-pageLayout' );
1860         for ( name in this.pages ) {
1861                 // Check for page match, exclude current page to find only page changes
1862                 if ( this.pages[ name ].$element[ 0 ] === $target[ 0 ] && name !== this.currentPageName ) {
1863                         this.setPage( name );
1864                         break;
1865                 }
1866         }
1867 };
1868
1869 /**
1870  * Handle visibleItemChange events from the stackLayout
1871  *
1872  * The next visible page is set as the current page by selecting it
1873  * in the outline
1874  *
1875  * @param {OO.ui.PageLayout} page The next visible page in the layout
1876  */
1877 OO.ui.BookletLayout.prototype.onStackLayoutVisibleItemChange = function ( page ) {
1878         // Set a flag to so that the resulting call to #onStackLayoutSet doesn't
1879         // try and scroll the item into view again.
1880         this.scrolling = true;
1881         this.outlineSelectWidget.selectItemByData( page.getName() );
1882         this.scrolling = false;
1883 };
1884
1885 /**
1886  * Handle stack layout set events.
1887  *
1888  * @private
1889  * @param {OO.ui.PanelLayout|null} page The page panel that is now the current panel
1890  */
1891 OO.ui.BookletLayout.prototype.onStackLayoutSet = function ( page ) {
1892         var promise, layout = this;
1893         // If everything is unselected, do nothing
1894         if ( !page ) {
1895                 return;
1896         }
1897         // For continuous BookletLayouts, scroll the selected page into view first
1898         if ( this.stackLayout.continuous && !this.scrolling ) {
1899                 promise = page.scrollElementIntoView();
1900         } else {
1901                 promise = $.Deferred().resolve();
1902         }
1903         // Focus the first element on the newly selected panel.
1904         // Don't focus if the page was set by scrolling.
1905         if ( this.autoFocus && !OO.ui.isMobile() && !this.scrolling ) {
1906                 promise.done( function () {
1907                         layout.focus();
1908                 } );
1909         }
1910 };
1911
1912 /**
1913  * Focus the first input in the current page.
1914  *
1915  * If no page is selected, the first selectable page will be selected.
1916  * If the focus is already in an element on the current page, nothing will happen.
1917  *
1918  * @param {number} [itemIndex] A specific item to focus on
1919  */
1920 OO.ui.BookletLayout.prototype.focus = function ( itemIndex ) {
1921         var page,
1922                 items = this.stackLayout.getItems();
1923
1924         if ( itemIndex !== undefined && items[ itemIndex ] ) {
1925                 page = items[ itemIndex ];
1926         } else {
1927                 page = this.stackLayout.getCurrentItem();
1928         }
1929
1930         if ( !page && this.outlined ) {
1931                 this.selectFirstSelectablePage();
1932                 page = this.stackLayout.getCurrentItem();
1933         }
1934         if ( !page ) {
1935                 return;
1936         }
1937         // Only change the focus if is not already in the current page
1938         if ( !OO.ui.contains( page.$element[ 0 ], this.getElementDocument().activeElement, true ) ) {
1939                 page.focus();
1940         }
1941 };
1942
1943 /**
1944  * Find the first focusable input in the booklet layout and focus
1945  * on it.
1946  */
1947 OO.ui.BookletLayout.prototype.focusFirstFocusable = function () {
1948         OO.ui.findFocusable( this.stackLayout.$element ).focus();
1949 };
1950
1951 /**
1952  * Handle outline widget select events.
1953  *
1954  * @private
1955  * @param {OO.ui.OptionWidget|null} item Selected item
1956  */
1957 OO.ui.BookletLayout.prototype.onOutlineSelectWidgetSelect = function ( item ) {
1958         if ( item ) {
1959                 this.setPage( item.getData() );
1960         }
1961 };
1962
1963 /**
1964  * Check if booklet has an outline.
1965  *
1966  * @return {boolean} Booklet has an outline
1967  */
1968 OO.ui.BookletLayout.prototype.isOutlined = function () {
1969         return this.outlined;
1970 };
1971
1972 /**
1973  * Check if booklet has editing controls.
1974  *
1975  * @return {boolean} Booklet is editable
1976  */
1977 OO.ui.BookletLayout.prototype.isEditable = function () {
1978         return this.editable;
1979 };
1980
1981 /**
1982  * Check if booklet has a visible outline.
1983  *
1984  * @return {boolean} Outline is visible
1985  */
1986 OO.ui.BookletLayout.prototype.isOutlineVisible = function () {
1987         return this.outlined && this.outlineVisible;
1988 };
1989
1990 /**
1991  * Hide or show the outline.
1992  *
1993  * @param {boolean} [show] Show outline, omit to invert current state
1994  * @chainable
1995  */
1996 OO.ui.BookletLayout.prototype.toggleOutline = function ( show ) {
1997         var booklet = this;
1998
1999         if ( this.outlined ) {
2000                 show = show === undefined ? !this.outlineVisible : !!show;
2001                 this.outlineVisible = show;
2002                 this.toggleMenu( show );
2003                 if ( show && this.editable ) {
2004                         // HACK: Kill dumb scrollbars when the sidebar stops animating, see T161798. Only necessary when
2005                         // outline controls are present, delay matches transition on `.oo-ui-menuLayout-menu`.
2006                         setTimeout( function () {
2007                                 OO.ui.Element.static.reconsiderScrollbars( booklet.outlinePanel.$element[ 0 ] );
2008                         }, 200 );
2009                 }
2010         }
2011
2012         return this;
2013 };
2014
2015 /**
2016  * Find the page closest to the specified page.
2017  *
2018  * @param {OO.ui.PageLayout} page Page to use as a reference point
2019  * @return {OO.ui.PageLayout|null} Page closest to the specified page
2020  */
2021 OO.ui.BookletLayout.prototype.findClosestPage = function ( page ) {
2022         var next, prev, level,
2023                 pages = this.stackLayout.getItems(),
2024                 index = pages.indexOf( page );
2025
2026         if ( index !== -1 ) {
2027                 next = pages[ index + 1 ];
2028                 prev = pages[ index - 1 ];
2029                 // Prefer adjacent pages at the same level
2030                 if ( this.outlined ) {
2031                         level = this.outlineSelectWidget.findItemFromData( page.getName() ).getLevel();
2032                         if (
2033                                 prev &&
2034                                 level === this.outlineSelectWidget.findItemFromData( prev.getName() ).getLevel()
2035                         ) {
2036                                 return prev;
2037                         }
2038                         if (
2039                                 next &&
2040                                 level === this.outlineSelectWidget.findItemFromData( next.getName() ).getLevel()
2041                         ) {
2042                                 return next;
2043                         }
2044                 }
2045         }
2046         return prev || next || null;
2047 };
2048
2049 /**
2050  * Get the outline widget.
2051  *
2052  * If the booklet is not outlined, the method will return `null`.
2053  *
2054  * @return {OO.ui.OutlineSelectWidget|null} Outline widget, or null if the booklet is not outlined
2055  */
2056 OO.ui.BookletLayout.prototype.getOutline = function () {
2057         return this.outlineSelectWidget;
2058 };
2059
2060 /**
2061  * Get the outline controls widget.
2062  *
2063  * If the outline is not editable, the method will return `null`.
2064  *
2065  * @return {OO.ui.OutlineControlsWidget|null} The outline controls widget.
2066  */
2067 OO.ui.BookletLayout.prototype.getOutlineControls = function () {
2068         return this.outlineControlsWidget;
2069 };
2070
2071 /**
2072  * Get a page by its symbolic name.
2073  *
2074  * @param {string} name Symbolic name of page
2075  * @return {OO.ui.PageLayout|undefined} Page, if found
2076  */
2077 OO.ui.BookletLayout.prototype.getPage = function ( name ) {
2078         return this.pages[ name ];
2079 };
2080
2081 /**
2082  * Get the current page.
2083  *
2084  * @return {OO.ui.PageLayout|undefined} Current page, if found
2085  */
2086 OO.ui.BookletLayout.prototype.getCurrentPage = function () {
2087         var name = this.getCurrentPageName();
2088         return name ? this.getPage( name ) : undefined;
2089 };
2090
2091 /**
2092  * Get the symbolic name of the current page.
2093  *
2094  * @return {string|null} Symbolic name of the current page
2095  */
2096 OO.ui.BookletLayout.prototype.getCurrentPageName = function () {
2097         return this.currentPageName;
2098 };
2099
2100 /**
2101  * Add pages to the booklet layout
2102  *
2103  * When pages are added with the same names as existing pages, the existing pages will be
2104  * automatically removed before the new pages are added.
2105  *
2106  * @param {OO.ui.PageLayout[]} pages Pages to add
2107  * @param {number} index Index of the insertion point
2108  * @fires add
2109  * @chainable
2110  */
2111 OO.ui.BookletLayout.prototype.addPages = function ( pages, index ) {
2112         var i, len, name, page, item, currentIndex,
2113                 stackLayoutPages = this.stackLayout.getItems(),
2114                 remove = [],
2115                 items = [];
2116
2117         // Remove pages with same names
2118         for ( i = 0, len = pages.length; i < len; i++ ) {
2119                 page = pages[ i ];
2120                 name = page.getName();
2121
2122                 if ( Object.prototype.hasOwnProperty.call( this.pages, name ) ) {
2123                         // Correct the insertion index
2124                         currentIndex = stackLayoutPages.indexOf( this.pages[ name ] );
2125                         if ( currentIndex !== -1 && currentIndex + 1 < index ) {
2126                                 index--;
2127                         }
2128                         remove.push( this.pages[ name ] );
2129                 }
2130         }
2131         if ( remove.length ) {
2132                 this.removePages( remove );
2133         }
2134
2135         // Add new pages
2136         for ( i = 0, len = pages.length; i < len; i++ ) {
2137                 page = pages[ i ];
2138                 name = page.getName();
2139                 this.pages[ page.getName() ] = page;
2140                 if ( this.outlined ) {
2141                         item = new OO.ui.OutlineOptionWidget( { data: name } );
2142                         page.setOutlineItem( item );
2143                         items.push( item );
2144                 }
2145         }
2146
2147         if ( this.outlined && items.length ) {
2148                 this.outlineSelectWidget.addItems( items, index );
2149                 this.selectFirstSelectablePage();
2150         }
2151         this.stackLayout.addItems( pages, index );
2152         this.emit( 'add', pages, index );
2153
2154         return this;
2155 };
2156
2157 /**
2158  * Remove the specified pages from the booklet layout.
2159  *
2160  * To remove all pages from the booklet, you may wish to use the #clearPages method instead.
2161  *
2162  * @param {OO.ui.PageLayout[]} pages An array of pages to remove
2163  * @fires remove
2164  * @chainable
2165  */
2166 OO.ui.BookletLayout.prototype.removePages = function ( pages ) {
2167         var i, len, name, page,
2168                 items = [];
2169
2170         for ( i = 0, len = pages.length; i < len; i++ ) {
2171                 page = pages[ i ];
2172                 name = page.getName();
2173                 delete this.pages[ name ];
2174                 if ( this.outlined ) {
2175                         items.push( this.outlineSelectWidget.findItemFromData( name ) );
2176                         page.setOutlineItem( null );
2177                 }
2178         }
2179         if ( this.outlined && items.length ) {
2180                 this.outlineSelectWidget.removeItems( items );
2181                 this.selectFirstSelectablePage();
2182         }
2183         this.stackLayout.removeItems( pages );
2184         this.emit( 'remove', pages );
2185
2186         return this;
2187 };
2188
2189 /**
2190  * Clear all pages from the booklet layout.
2191  *
2192  * To remove only a subset of pages from the booklet, use the #removePages method.
2193  *
2194  * @fires remove
2195  * @chainable
2196  */
2197 OO.ui.BookletLayout.prototype.clearPages = function () {
2198         var i, len,
2199                 pages = this.stackLayout.getItems();
2200
2201         this.pages = {};
2202         this.currentPageName = null;
2203         if ( this.outlined ) {
2204                 this.outlineSelectWidget.clearItems();
2205                 for ( i = 0, len = pages.length; i < len; i++ ) {
2206                         pages[ i ].setOutlineItem( null );
2207                 }
2208         }
2209         this.stackLayout.clearItems();
2210
2211         this.emit( 'remove', pages );
2212
2213         return this;
2214 };
2215
2216 /**
2217  * Set the current page by symbolic name.
2218  *
2219  * @fires set
2220  * @param {string} name Symbolic name of page
2221  */
2222 OO.ui.BookletLayout.prototype.setPage = function ( name ) {
2223         var selectedItem,
2224                 $focused,
2225                 page = this.pages[ name ],
2226                 previousPage = this.currentPageName && this.pages[ this.currentPageName ];
2227
2228         if ( name !== this.currentPageName ) {
2229                 if ( this.outlined ) {
2230                         selectedItem = this.outlineSelectWidget.findSelectedItem();
2231                         if ( selectedItem && selectedItem.getData() !== name ) {
2232                                 this.outlineSelectWidget.selectItemByData( name );
2233                         }
2234                 }
2235                 if ( page ) {
2236                         if ( previousPage ) {
2237                                 previousPage.setActive( false );
2238                                 // Blur anything focused if the next page doesn't have anything focusable.
2239                                 // This is not needed if the next page has something focusable (because once it is focused
2240                                 // this blur happens automatically). If the layout is non-continuous, this check is
2241                                 // meaningless because the next page is not visible yet and thus can't hold focus.
2242                                 if (
2243                                         this.autoFocus &&
2244                                         !OO.ui.isMobile() &&
2245                                         this.stackLayout.continuous &&
2246                                         OO.ui.findFocusable( page.$element ).length !== 0
2247                                 ) {
2248                                         $focused = previousPage.$element.find( ':focus' );
2249                                         if ( $focused.length ) {
2250                                                 $focused[ 0 ].blur();
2251                                         }
2252                                 }
2253                         }
2254                         this.currentPageName = name;
2255                         page.setActive( true );
2256                         this.stackLayout.setItem( page );
2257                         if ( !this.stackLayout.continuous && previousPage ) {
2258                                 // This should not be necessary, since any inputs on the previous page should have been
2259                                 // blurred when it was hidden, but browsers are not very consistent about this.
2260                                 $focused = previousPage.$element.find( ':focus' );
2261                                 if ( $focused.length ) {
2262                                         $focused[ 0 ].blur();
2263                                 }
2264                         }
2265                         this.emit( 'set', page );
2266                 }
2267         }
2268 };
2269
2270 /**
2271  * Select the first selectable page.
2272  *
2273  * @chainable
2274  */
2275 OO.ui.BookletLayout.prototype.selectFirstSelectablePage = function () {
2276         if ( !this.outlineSelectWidget.findSelectedItem() ) {
2277                 this.outlineSelectWidget.selectItem( this.outlineSelectWidget.findFirstSelectableItem() );
2278         }
2279
2280         return this;
2281 };
2282
2283 /**
2284  * IndexLayouts contain {@link OO.ui.TabPanelLayout tab panel layouts} as well as
2285  * {@link OO.ui.TabSelectWidget tabs} that allow users to easily navigate through the tab panels and
2286  * select which one to display. By default, only one tab panel is displayed at a time. When a user
2287  * navigates to a new tab panel, the index layout automatically focuses on the first focusable element,
2288  * unless the default setting is changed.
2289  *
2290  * TODO: This class is similar to BookletLayout, we may want to refactor to reduce duplication
2291  *
2292  *     @example
2293  *     // Example of a IndexLayout that contains two TabPanelLayouts.
2294  *
2295  *     function TabPanelOneLayout( name, config ) {
2296  *         TabPanelOneLayout.parent.call( this, name, config );
2297  *         this.$element.append( '<p>First tab panel</p>' );
2298  *     }
2299  *     OO.inheritClass( TabPanelOneLayout, OO.ui.TabPanelLayout );
2300  *     TabPanelOneLayout.prototype.setupTabItem = function () {
2301  *         this.tabItem.setLabel( 'Tab panel one' );
2302  *     };
2303  *
2304  *     var tabPanel1 = new TabPanelOneLayout( 'one' ),
2305  *         tabPanel2 = new OO.ui.TabPanelLayout( 'two', { label: 'Tab panel two' } );
2306  *
2307  *     tabPanel2.$element.append( '<p>Second tab panel</p>' );
2308  *
2309  *     var index = new OO.ui.IndexLayout();
2310  *
2311  *     index.addTabPanels ( [ tabPanel1, tabPanel2 ] );
2312  *     $( 'body' ).append( index.$element );
2313  *
2314  * @class
2315  * @extends OO.ui.MenuLayout
2316  *
2317  * @constructor
2318  * @param {Object} [config] Configuration options
2319  * @cfg {boolean} [continuous=false] Show all tab panels, one after another
2320  * @cfg {boolean} [autoFocus=true] Focus on the first focusable element when a new tab panel is displayed. Disabled on mobile.
2321  */
2322 OO.ui.IndexLayout = function OoUiIndexLayout( config ) {
2323         // Configuration initialization
2324         config = $.extend( {}, config, { menuPosition: 'top' } );
2325
2326         // Parent constructor
2327         OO.ui.IndexLayout.parent.call( this, config );
2328
2329         // Properties
2330         this.currentTabPanelName = null;
2331         this.tabPanels = {};
2332
2333         this.ignoreFocus = false;
2334         this.stackLayout = new OO.ui.StackLayout( {
2335                 continuous: !!config.continuous,
2336                 expanded: this.expanded
2337         } );
2338         this.$content.append( this.stackLayout.$element );
2339         this.autoFocus = config.autoFocus === undefined || !!config.autoFocus;
2340
2341         this.tabSelectWidget = new OO.ui.TabSelectWidget();
2342         this.tabPanel = new OO.ui.PanelLayout( {
2343                 expanded: this.expanded
2344         } );
2345         this.$menu.append( this.tabPanel.$element );
2346
2347         this.toggleMenu( true );
2348
2349         // Events
2350         this.stackLayout.connect( this, { set: 'onStackLayoutSet' } );
2351         this.tabSelectWidget.connect( this, { select: 'onTabSelectWidgetSelect' } );
2352         if ( this.autoFocus ) {
2353                 // Event 'focus' does not bubble, but 'focusin' does
2354                 this.stackLayout.$element.on( 'focusin', this.onStackLayoutFocus.bind( this ) );
2355         }
2356
2357         // Initialization
2358         this.$element.addClass( 'oo-ui-indexLayout' );
2359         this.stackLayout.$element.addClass( 'oo-ui-indexLayout-stackLayout' );
2360         this.tabPanel.$element
2361                 .addClass( 'oo-ui-indexLayout-tabPanel' )
2362                 .append( this.tabSelectWidget.$element );
2363 };
2364
2365 /* Setup */
2366
2367 OO.inheritClass( OO.ui.IndexLayout, OO.ui.MenuLayout );
2368
2369 /* Events */
2370
2371 /**
2372  * A 'set' event is emitted when a tab panel is {@link #setTabPanel set} to be displayed by the index layout.
2373  * @event set
2374  * @param {OO.ui.TabPanelLayout} tabPanel Current tab panel
2375  */
2376
2377 /**
2378  * An 'add' event is emitted when tab panels are {@link #addTabPanels added} to the index layout.
2379  *
2380  * @event add
2381  * @param {OO.ui.TabPanelLayout[]} tabPanel Added tab panels
2382  * @param {number} index Index tab panels were added at
2383  */
2384
2385 /**
2386  * A 'remove' event is emitted when tab panels are {@link #clearTabPanels cleared} or
2387  * {@link #removeTabPanels removed} from the index.
2388  *
2389  * @event remove
2390  * @param {OO.ui.TabPanelLayout[]} tabPanel Removed tab panels
2391  */
2392
2393 /* Methods */
2394
2395 /**
2396  * Handle stack layout focus.
2397  *
2398  * @private
2399  * @param {jQuery.Event} e Focusing event
2400  */
2401 OO.ui.IndexLayout.prototype.onStackLayoutFocus = function ( e ) {
2402         var name, $target;
2403
2404         // Find the tab panel that an element was focused within
2405         $target = $( e.target ).closest( '.oo-ui-tabPanelLayout' );
2406         for ( name in this.tabPanels ) {
2407                 // Check for tab panel match, exclude current tab panel to find only tab panel changes
2408                 if ( this.tabPanels[ name ].$element[ 0 ] === $target[ 0 ] && name !== this.currentTabPanelName ) {
2409                         this.setTabPanel( name );
2410                         break;
2411                 }
2412         }
2413 };
2414
2415 /**
2416  * Handle stack layout set events.
2417  *
2418  * @private
2419  * @param {OO.ui.PanelLayout|null} tabPanel The tab panel that is now the current panel
2420  */
2421 OO.ui.IndexLayout.prototype.onStackLayoutSet = function ( tabPanel ) {
2422         // If everything is unselected, do nothing
2423         if ( !tabPanel ) {
2424                 return;
2425         }
2426         // Focus the first element on the newly selected panel
2427         if ( this.autoFocus && !OO.ui.isMobile() ) {
2428                 this.focus();
2429         }
2430 };
2431
2432 /**
2433  * Focus the first input in the current tab panel.
2434  *
2435  * If no tab panel is selected, the first selectable tab panel will be selected.
2436  * If the focus is already in an element on the current tab panel, nothing will happen.
2437  *
2438  * @param {number} [itemIndex] A specific item to focus on
2439  */
2440 OO.ui.IndexLayout.prototype.focus = function ( itemIndex ) {
2441         var tabPanel,
2442                 items = this.stackLayout.getItems();
2443
2444         if ( itemIndex !== undefined && items[ itemIndex ] ) {
2445                 tabPanel = items[ itemIndex ];
2446         } else {
2447                 tabPanel = this.stackLayout.getCurrentItem();
2448         }
2449
2450         if ( !tabPanel ) {
2451                 this.selectFirstSelectableTabPanel();
2452                 tabPanel = this.stackLayout.getCurrentItem();
2453         }
2454         if ( !tabPanel ) {
2455                 return;
2456         }
2457         // Only change the focus if is not already in the current page
2458         if ( !OO.ui.contains( tabPanel.$element[ 0 ], this.getElementDocument().activeElement, true ) ) {
2459                 tabPanel.focus();
2460         }
2461 };
2462
2463 /**
2464  * Find the first focusable input in the index layout and focus
2465  * on it.
2466  */
2467 OO.ui.IndexLayout.prototype.focusFirstFocusable = function () {
2468         OO.ui.findFocusable( this.stackLayout.$element ).focus();
2469 };
2470
2471 /**
2472  * Handle tab widget select events.
2473  *
2474  * @private
2475  * @param {OO.ui.OptionWidget|null} item Selected item
2476  */
2477 OO.ui.IndexLayout.prototype.onTabSelectWidgetSelect = function ( item ) {
2478         if ( item ) {
2479                 this.setTabPanel( item.getData() );
2480         }
2481 };
2482
2483 /**
2484  * Get the tab panel closest to the specified tab panel.
2485  *
2486  * @param {OO.ui.TabPanelLayout} tabPanel Tab panel to use as a reference point
2487  * @return {OO.ui.TabPanelLayout|null} Tab panel closest to the specified
2488  */
2489 OO.ui.IndexLayout.prototype.getClosestTabPanel = function ( tabPanel ) {
2490         var next, prev, level,
2491                 tabPanels = this.stackLayout.getItems(),
2492                 index = tabPanels.indexOf( tabPanel );
2493
2494         if ( index !== -1 ) {
2495                 next = tabPanels[ index + 1 ];
2496                 prev = tabPanels[ index - 1 ];
2497                 // Prefer adjacent tab panels at the same level
2498                 level = this.tabSelectWidget.findItemFromData( tabPanel.getName() ).getLevel();
2499                 if (
2500                         prev &&
2501                         level === this.tabSelectWidget.findItemFromData( prev.getName() ).getLevel()
2502                 ) {
2503                         return prev;
2504                 }
2505                 if (
2506                         next &&
2507                         level === this.tabSelectWidget.findItemFromData( next.getName() ).getLevel()
2508                 ) {
2509                         return next;
2510                 }
2511         }
2512         return prev || next || null;
2513 };
2514
2515 /**
2516  * Get the tabs widget.
2517  *
2518  * @return {OO.ui.TabSelectWidget} Tabs widget
2519  */
2520 OO.ui.IndexLayout.prototype.getTabs = function () {
2521         return this.tabSelectWidget;
2522 };
2523
2524 /**
2525  * Get a tab panel by its symbolic name.
2526  *
2527  * @param {string} name Symbolic name of tab panel
2528  * @return {OO.ui.TabPanelLayout|undefined} Tab panel, if found
2529  */
2530 OO.ui.IndexLayout.prototype.getTabPanel = function ( name ) {
2531         return this.tabPanels[ name ];
2532 };
2533
2534 /**
2535  * Get the current tab panel.
2536  *
2537  * @return {OO.ui.TabPanelLayout|undefined} Current tab panel, if found
2538  */
2539 OO.ui.IndexLayout.prototype.getCurrentTabPanel = function () {
2540         var name = this.getCurrentTabPanelName();
2541         return name ? this.getTabPanel( name ) : undefined;
2542 };
2543
2544 /**
2545  * Get the symbolic name of the current tab panel.
2546  *
2547  * @return {string|null} Symbolic name of the current tab panel
2548  */
2549 OO.ui.IndexLayout.prototype.getCurrentTabPanelName = function () {
2550         return this.currentTabPanelName;
2551 };
2552
2553 /**
2554  * Add tab panels to the index layout
2555  *
2556  * When tab panels are added with the same names as existing tab panels, the existing tab panels
2557  * will be automatically removed before the new tab panels are added.
2558  *
2559  * @param {OO.ui.TabPanelLayout[]} tabPanels Tab panels to add
2560  * @param {number} index Index of the insertion point
2561  * @fires add
2562  * @chainable
2563  */
2564 OO.ui.IndexLayout.prototype.addTabPanels = function ( tabPanels, index ) {
2565         var i, len, name, tabPanel, item, currentIndex,
2566                 stackLayoutTabPanels = this.stackLayout.getItems(),
2567                 remove = [],
2568                 items = [];
2569
2570         // Remove tab panels with same names
2571         for ( i = 0, len = tabPanels.length; i < len; i++ ) {
2572                 tabPanel = tabPanels[ i ];
2573                 name = tabPanel.getName();
2574
2575                 if ( Object.prototype.hasOwnProperty.call( this.tabPanels, name ) ) {
2576                         // Correct the insertion index
2577                         currentIndex = stackLayoutTabPanels.indexOf( this.tabPanels[ name ] );
2578                         if ( currentIndex !== -1 && currentIndex + 1 < index ) {
2579                                 index--;
2580                         }
2581                         remove.push( this.tabPanels[ name ] );
2582                 }
2583         }
2584         if ( remove.length ) {
2585                 this.removeTabPanels( remove );
2586         }
2587
2588         // Add new tab panels
2589         for ( i = 0, len = tabPanels.length; i < len; i++ ) {
2590                 tabPanel = tabPanels[ i ];
2591                 name = tabPanel.getName();
2592                 this.tabPanels[ tabPanel.getName() ] = tabPanel;
2593                 item = new OO.ui.TabOptionWidget( { data: name } );
2594                 tabPanel.setTabItem( item );
2595                 items.push( item );
2596         }
2597
2598         if ( items.length ) {
2599                 this.tabSelectWidget.addItems( items, index );
2600                 this.selectFirstSelectableTabPanel();
2601         }
2602         this.stackLayout.addItems( tabPanels, index );
2603         this.emit( 'add', tabPanels, index );
2604
2605         return this;
2606 };
2607
2608 /**
2609  * Remove the specified tab panels from the index layout.
2610  *
2611  * To remove all tab panels from the index, you may wish to use the #clearTabPanels method instead.
2612  *
2613  * @param {OO.ui.TabPanelLayout[]} tabPanels An array of tab panels to remove
2614  * @fires remove
2615  * @chainable
2616  */
2617 OO.ui.IndexLayout.prototype.removeTabPanels = function ( tabPanels ) {
2618         var i, len, name, tabPanel,
2619                 items = [];
2620
2621         for ( i = 0, len = tabPanels.length; i < len; i++ ) {
2622                 tabPanel = tabPanels[ i ];
2623                 name = tabPanel.getName();
2624                 delete this.tabPanels[ name ];
2625                 items.push( this.tabSelectWidget.findItemFromData( name ) );
2626                 tabPanel.setTabItem( null );
2627         }
2628         if ( items.length ) {
2629                 this.tabSelectWidget.removeItems( items );
2630                 this.selectFirstSelectableTabPanel();
2631         }
2632         this.stackLayout.removeItems( tabPanels );
2633         this.emit( 'remove', tabPanels );
2634
2635         return this;
2636 };
2637
2638 /**
2639  * Clear all tab panels from the index layout.
2640  *
2641  * To remove only a subset of tab panels from the index, use the #removeTabPanels method.
2642  *
2643  * @fires remove
2644  * @chainable
2645  */
2646 OO.ui.IndexLayout.prototype.clearTabPanels = function () {
2647         var i, len,
2648                 tabPanels = this.stackLayout.getItems();
2649
2650         this.tabPanels = {};
2651         this.currentTabPanelName = null;
2652         this.tabSelectWidget.clearItems();
2653         for ( i = 0, len = tabPanels.length; i < len; i++ ) {
2654                 tabPanels[ i ].setTabItem( null );
2655         }
2656         this.stackLayout.clearItems();
2657
2658         this.emit( 'remove', tabPanels );
2659
2660         return this;
2661 };
2662
2663 /**
2664  * Set the current tab panel by symbolic name.
2665  *
2666  * @fires set
2667  * @param {string} name Symbolic name of tab panel
2668  */
2669 OO.ui.IndexLayout.prototype.setTabPanel = function ( name ) {
2670         var selectedItem,
2671                 $focused,
2672                 tabPanel = this.tabPanels[ name ],
2673                 previousTabPanel = this.currentTabPanelName && this.tabPanels[ this.currentTabPanelName ];
2674
2675         if ( name !== this.currentTabPanelName ) {
2676                 selectedItem = this.tabSelectWidget.findSelectedItem();
2677                 if ( selectedItem && selectedItem.getData() !== name ) {
2678                         this.tabSelectWidget.selectItemByData( name );
2679                 }
2680                 if ( tabPanel ) {
2681                         if ( previousTabPanel ) {
2682                                 previousTabPanel.setActive( false );
2683                                 // Blur anything focused if the next tab panel doesn't have anything focusable.
2684                                 // This is not needed if the next tab panel has something focusable (because once it is focused
2685                                 // this blur happens automatically). If the layout is non-continuous, this check is
2686                                 // meaningless because the next tab panel is not visible yet and thus can't hold focus.
2687                                 if (
2688                                         this.autoFocus &&
2689                                         !OO.ui.isMobile() &&
2690                                         this.stackLayout.continuous &&
2691                                         OO.ui.findFocusable( tabPanel.$element ).length !== 0
2692                                 ) {
2693                                         $focused = previousTabPanel.$element.find( ':focus' );
2694                                         if ( $focused.length ) {
2695                                                 $focused[ 0 ].blur();
2696                                         }
2697                                 }
2698                         }
2699                         this.currentTabPanelName = name;
2700                         tabPanel.setActive( true );
2701                         this.stackLayout.setItem( tabPanel );
2702                         if ( !this.stackLayout.continuous && previousTabPanel ) {
2703                                 // This should not be necessary, since any inputs on the previous tab panel should have been
2704                                 // blurred when it was hidden, but browsers are not very consistent about this.
2705                                 $focused = previousTabPanel.$element.find( ':focus' );
2706                                 if ( $focused.length ) {
2707                                         $focused[ 0 ].blur();
2708                                 }
2709                         }
2710                         this.emit( 'set', tabPanel );
2711                 }
2712         }
2713 };
2714
2715 /**
2716  * Select the first selectable tab panel.
2717  *
2718  * @chainable
2719  */
2720 OO.ui.IndexLayout.prototype.selectFirstSelectableTabPanel = function () {
2721         if ( !this.tabSelectWidget.findSelectedItem() ) {
2722                 this.tabSelectWidget.selectItem( this.tabSelectWidget.findFirstSelectableItem() );
2723         }
2724
2725         return this;
2726 };
2727
2728 /**
2729  * ToggleWidget implements basic behavior of widgets with an on/off state.
2730  * Please see OO.ui.ToggleButtonWidget and OO.ui.ToggleSwitchWidget for examples.
2731  *
2732  * @abstract
2733  * @class
2734  * @extends OO.ui.Widget
2735  *
2736  * @constructor
2737  * @param {Object} [config] Configuration options
2738  * @cfg {boolean} [value=false] The toggle’s initial on/off state.
2739  *  By default, the toggle is in the 'off' state.
2740  */
2741 OO.ui.ToggleWidget = function OoUiToggleWidget( config ) {
2742         // Configuration initialization
2743         config = config || {};
2744
2745         // Parent constructor
2746         OO.ui.ToggleWidget.parent.call( this, config );
2747
2748         // Properties
2749         this.value = null;
2750
2751         // Initialization
2752         this.$element.addClass( 'oo-ui-toggleWidget' );
2753         this.setValue( !!config.value );
2754 };
2755
2756 /* Setup */
2757
2758 OO.inheritClass( OO.ui.ToggleWidget, OO.ui.Widget );
2759
2760 /* Events */
2761
2762 /**
2763  * @event change
2764  *
2765  * A change event is emitted when the on/off state of the toggle changes.
2766  *
2767  * @param {boolean} value Value representing the new state of the toggle
2768  */
2769
2770 /* Methods */
2771
2772 /**
2773  * Get the value representing the toggle’s state.
2774  *
2775  * @return {boolean} The on/off state of the toggle
2776  */
2777 OO.ui.ToggleWidget.prototype.getValue = function () {
2778         return this.value;
2779 };
2780
2781 /**
2782  * Set the state of the toggle: `true` for 'on', `false` for 'off'.
2783  *
2784  * @param {boolean} value The state of the toggle
2785  * @fires change
2786  * @chainable
2787  */
2788 OO.ui.ToggleWidget.prototype.setValue = function ( value ) {
2789         value = !!value;
2790         if ( this.value !== value ) {
2791                 this.value = value;
2792                 this.emit( 'change', value );
2793                 this.$element.toggleClass( 'oo-ui-toggleWidget-on', value );
2794                 this.$element.toggleClass( 'oo-ui-toggleWidget-off', !value );
2795         }
2796         return this;
2797 };
2798
2799 /**
2800  * ToggleButtons are buttons that have a state (‘on’ or ‘off’) that is represented by a
2801  * Boolean value. Like other {@link OO.ui.ButtonWidget buttons}, toggle buttons can be
2802  * configured with {@link OO.ui.mixin.IconElement icons}, {@link OO.ui.mixin.IndicatorElement indicators},
2803  * {@link OO.ui.mixin.TitledElement titles}, {@link OO.ui.mixin.FlaggedElement styling flags},
2804  * and {@link OO.ui.mixin.LabelElement labels}. Please see
2805  * the [OOUI documentation][1] on MediaWiki for more information.
2806  *
2807  *     @example
2808  *     // Toggle buttons in the 'off' and 'on' state.
2809  *     var toggleButton1 = new OO.ui.ToggleButtonWidget( {
2810  *         label: 'Toggle Button off'
2811  *     } );
2812  *     var toggleButton2 = new OO.ui.ToggleButtonWidget( {
2813  *         label: 'Toggle Button on',
2814  *         value: true
2815  *     } );
2816  *     // Append the buttons to the DOM.
2817  *     $( 'body' ).append( toggleButton1.$element, toggleButton2.$element );
2818  *
2819  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets/Buttons_and_Switches#Toggle_buttons
2820  *
2821  * @class
2822  * @extends OO.ui.ToggleWidget
2823  * @mixins OO.ui.mixin.ButtonElement
2824  * @mixins OO.ui.mixin.IconElement
2825  * @mixins OO.ui.mixin.IndicatorElement
2826  * @mixins OO.ui.mixin.LabelElement
2827  * @mixins OO.ui.mixin.TitledElement
2828  * @mixins OO.ui.mixin.FlaggedElement
2829  * @mixins OO.ui.mixin.TabIndexedElement
2830  *
2831  * @constructor
2832  * @param {Object} [config] Configuration options
2833  * @cfg {boolean} [value=false] The toggle button’s initial on/off
2834  *  state. By default, the button is in the 'off' state.
2835  */
2836 OO.ui.ToggleButtonWidget = function OoUiToggleButtonWidget( config ) {
2837         // Configuration initialization
2838         config = config || {};
2839
2840         // Parent constructor
2841         OO.ui.ToggleButtonWidget.parent.call( this, config );
2842
2843         // Mixin constructors
2844         OO.ui.mixin.ButtonElement.call( this, $.extend( {}, config, { active: this.active } ) );
2845         OO.ui.mixin.IconElement.call( this, config );
2846         OO.ui.mixin.IndicatorElement.call( this, config );
2847         OO.ui.mixin.LabelElement.call( this, config );
2848         OO.ui.mixin.TitledElement.call( this, $.extend( {}, config, { $titled: this.$button } ) );
2849         OO.ui.mixin.FlaggedElement.call( this, config );
2850         OO.ui.mixin.TabIndexedElement.call( this, $.extend( {}, config, { $tabIndexed: this.$button } ) );
2851
2852         // Events
2853         this.connect( this, { click: 'onAction' } );
2854
2855         // Initialization
2856         this.$button.append( this.$icon, this.$label, this.$indicator );
2857         this.$element
2858                 .addClass( 'oo-ui-toggleButtonWidget' )
2859                 .append( this.$button );
2860 };
2861
2862 /* Setup */
2863
2864 OO.inheritClass( OO.ui.ToggleButtonWidget, OO.ui.ToggleWidget );
2865 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.ButtonElement );
2866 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.IconElement );
2867 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.IndicatorElement );
2868 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.LabelElement );
2869 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.TitledElement );
2870 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.FlaggedElement );
2871 OO.mixinClass( OO.ui.ToggleButtonWidget, OO.ui.mixin.TabIndexedElement );
2872
2873 /* Static Properties */
2874
2875 /**
2876  * @static
2877  * @inheritdoc
2878  */
2879 OO.ui.ToggleButtonWidget.static.tagName = 'span';
2880
2881 /* Methods */
2882
2883 /**
2884  * Handle the button action being triggered.
2885  *
2886  * @private
2887  */
2888 OO.ui.ToggleButtonWidget.prototype.onAction = function () {
2889         this.setValue( !this.value );
2890 };
2891
2892 /**
2893  * @inheritdoc
2894  */
2895 OO.ui.ToggleButtonWidget.prototype.setValue = function ( value ) {
2896         value = !!value;
2897         if ( value !== this.value ) {
2898                 // Might be called from parent constructor before ButtonElement constructor
2899                 if ( this.$button ) {
2900                         this.$button.attr( 'aria-pressed', value.toString() );
2901                 }
2902                 this.setActive( value );
2903         }
2904
2905         // Parent method
2906         OO.ui.ToggleButtonWidget.parent.prototype.setValue.call( this, value );
2907
2908         return this;
2909 };
2910
2911 /**
2912  * @inheritdoc
2913  */
2914 OO.ui.ToggleButtonWidget.prototype.setButtonElement = function ( $button ) {
2915         if ( this.$button ) {
2916                 this.$button.removeAttr( 'aria-pressed' );
2917         }
2918         OO.ui.mixin.ButtonElement.prototype.setButtonElement.call( this, $button );
2919         this.$button.attr( 'aria-pressed', this.value.toString() );
2920 };
2921
2922 /**
2923  * ToggleSwitches are switches that slide on and off. Their state is represented by a Boolean
2924  * value (`true` for ‘on’, and `false` otherwise, the default). The ‘off’ state is represented
2925  * visually by a slider in the leftmost position.
2926  *
2927  *     @example
2928  *     // Toggle switches in the 'off' and 'on' position.
2929  *     var toggleSwitch1 = new OO.ui.ToggleSwitchWidget();
2930  *     var toggleSwitch2 = new OO.ui.ToggleSwitchWidget( {
2931  *         value: true
2932  *     } );
2933  *
2934  *     // Create a FieldsetLayout to layout and label switches
2935  *     var fieldset = new OO.ui.FieldsetLayout( {
2936  *        label: 'Toggle switches'
2937  *     } );
2938  *     fieldset.addItems( [
2939  *         new OO.ui.FieldLayout( toggleSwitch1, { label: 'Off', align: 'top' } ),
2940  *         new OO.ui.FieldLayout( toggleSwitch2, { label: 'On', align: 'top' } )
2941  *     ] );
2942  *     $( 'body' ).append( fieldset.$element );
2943  *
2944  * @class
2945  * @extends OO.ui.ToggleWidget
2946  * @mixins OO.ui.mixin.TabIndexedElement
2947  *
2948  * @constructor
2949  * @param {Object} [config] Configuration options
2950  * @cfg {boolean} [value=false] The toggle switch’s initial on/off state.
2951  *  By default, the toggle switch is in the 'off' position.
2952  */
2953 OO.ui.ToggleSwitchWidget = function OoUiToggleSwitchWidget( config ) {
2954         // Parent constructor
2955         OO.ui.ToggleSwitchWidget.parent.call( this, config );
2956
2957         // Mixin constructors
2958         OO.ui.mixin.TabIndexedElement.call( this, config );
2959
2960         // Properties
2961         this.dragging = false;
2962         this.dragStart = null;
2963         this.sliding = false;
2964         this.$glow = $( '<span>' );
2965         this.$grip = $( '<span>' );
2966
2967         // Events
2968         this.$element.on( {
2969                 click: this.onClick.bind( this ),
2970                 keypress: this.onKeyPress.bind( this )
2971         } );
2972
2973         // Initialization
2974         this.$glow.addClass( 'oo-ui-toggleSwitchWidget-glow' );
2975         this.$grip.addClass( 'oo-ui-toggleSwitchWidget-grip' );
2976         this.$element
2977                 .addClass( 'oo-ui-toggleSwitchWidget' )
2978                 .attr( 'role', 'checkbox' )
2979                 .append( this.$glow, this.$grip );
2980 };
2981
2982 /* Setup */
2983
2984 OO.inheritClass( OO.ui.ToggleSwitchWidget, OO.ui.ToggleWidget );
2985 OO.mixinClass( OO.ui.ToggleSwitchWidget, OO.ui.mixin.TabIndexedElement );
2986
2987 /* Methods */
2988
2989 /**
2990  * Handle mouse click events.
2991  *
2992  * @private
2993  * @param {jQuery.Event} e Mouse click event
2994  */
2995 OO.ui.ToggleSwitchWidget.prototype.onClick = function ( e ) {
2996         if ( !this.isDisabled() && e.which === OO.ui.MouseButtons.LEFT ) {
2997                 this.setValue( !this.value );
2998         }
2999         return false;
3000 };
3001
3002 /**
3003  * Handle key press events.
3004  *
3005  * @private
3006  * @param {jQuery.Event} e Key press event
3007  */
3008 OO.ui.ToggleSwitchWidget.prototype.onKeyPress = function ( e ) {
3009         if ( !this.isDisabled() && ( e.which === OO.ui.Keys.SPACE || e.which === OO.ui.Keys.ENTER ) ) {
3010                 this.setValue( !this.value );
3011                 return false;
3012         }
3013 };
3014
3015 /**
3016  * @inheritdoc
3017  */
3018 OO.ui.ToggleSwitchWidget.prototype.setValue = function ( value ) {
3019         OO.ui.ToggleSwitchWidget.parent.prototype.setValue.call( this, value );
3020         this.$element.attr( 'aria-checked', this.value.toString() );
3021         return this;
3022 };
3023
3024 /**
3025  * @inheritdoc
3026  */
3027 OO.ui.ToggleSwitchWidget.prototype.simulateLabelClick = function () {
3028         if ( !this.isDisabled() ) {
3029                 this.setValue( !this.value );
3030         }
3031         this.focus();
3032 };
3033
3034 /**
3035  * OutlineControlsWidget is a set of controls for an {@link OO.ui.OutlineSelectWidget outline select widget}.
3036  * Controls include moving items up and down, removing items, and adding different kinds of items.
3037  *
3038  * **Currently, this class is only used by {@link OO.ui.BookletLayout booklet layouts}.**
3039  *
3040  * @class
3041  * @extends OO.ui.Widget
3042  * @mixins OO.ui.mixin.GroupElement
3043  *
3044  * @constructor
3045  * @param {OO.ui.OutlineSelectWidget} outline Outline to control
3046  * @param {Object} [config] Configuration options
3047  * @cfg {Object} [abilities] List of abilties
3048  * @cfg {boolean} [abilities.move=true] Allow moving movable items
3049  * @cfg {boolean} [abilities.remove=true] Allow removing removable items
3050  */
3051 OO.ui.OutlineControlsWidget = function OoUiOutlineControlsWidget( outline, config ) {
3052         // Allow passing positional parameters inside the config object
3053         if ( OO.isPlainObject( outline ) && config === undefined ) {
3054                 config = outline;
3055                 outline = config.outline;
3056         }
3057
3058         // Configuration initialization
3059         config = config || {};
3060
3061         // Parent constructor
3062         OO.ui.OutlineControlsWidget.parent.call( this, config );
3063
3064         // Mixin constructors
3065         OO.ui.mixin.GroupElement.call( this, config );
3066
3067         // Properties
3068         this.outline = outline;
3069         this.$movers = $( '<div>' );
3070         this.upButton = new OO.ui.ButtonWidget( {
3071                 framed: false,
3072                 icon: 'collapse',
3073                 title: OO.ui.msg( 'ooui-outline-control-move-up' )
3074         } );
3075         this.downButton = new OO.ui.ButtonWidget( {
3076                 framed: false,
3077                 icon: 'expand',
3078                 title: OO.ui.msg( 'ooui-outline-control-move-down' )
3079         } );
3080         this.removeButton = new OO.ui.ButtonWidget( {
3081                 framed: false,
3082                 icon: 'trash',
3083                 title: OO.ui.msg( 'ooui-outline-control-remove' )
3084         } );
3085         this.abilities = { move: true, remove: true };
3086
3087         // Events
3088         outline.connect( this, {
3089                 select: 'onOutlineChange',
3090                 add: 'onOutlineChange',
3091                 remove: 'onOutlineChange'
3092         } );
3093         this.upButton.connect( this, { click: [ 'emit', 'move', -1 ] } );
3094         this.downButton.connect( this, { click: [ 'emit', 'move', 1 ] } );
3095         this.removeButton.connect( this, { click: [ 'emit', 'remove' ] } );
3096
3097         // Initialization
3098         this.$element.addClass( 'oo-ui-outlineControlsWidget' );
3099         this.$group.addClass( 'oo-ui-outlineControlsWidget-items' );
3100         this.$movers
3101                 .addClass( 'oo-ui-outlineControlsWidget-movers' )
3102                 .append( this.removeButton.$element, this.upButton.$element, this.downButton.$element );
3103         this.$element.append( this.$icon, this.$group, this.$movers );
3104         this.setAbilities( config.abilities || {} );
3105 };
3106
3107 /* Setup */
3108
3109 OO.inheritClass( OO.ui.OutlineControlsWidget, OO.ui.Widget );
3110 OO.mixinClass( OO.ui.OutlineControlsWidget, OO.ui.mixin.GroupElement );
3111
3112 /* Events */
3113
3114 /**
3115  * @event move
3116  * @param {number} places Number of places to move
3117  */
3118
3119 /**
3120  * @event remove
3121  */
3122
3123 /* Methods */
3124
3125 /**
3126  * Set abilities.
3127  *
3128  * @param {Object} abilities List of abilties
3129  * @param {boolean} [abilities.move] Allow moving movable items
3130  * @param {boolean} [abilities.remove] Allow removing removable items
3131  */
3132 OO.ui.OutlineControlsWidget.prototype.setAbilities = function ( abilities ) {
3133         var ability;
3134
3135         for ( ability in this.abilities ) {
3136                 if ( abilities[ ability ] !== undefined ) {
3137                         this.abilities[ ability ] = !!abilities[ ability ];
3138                 }
3139         }
3140
3141         this.onOutlineChange();
3142 };
3143
3144 /**
3145  * Handle outline change events.
3146  *
3147  * @private
3148  */
3149 OO.ui.OutlineControlsWidget.prototype.onOutlineChange = function () {
3150         var i, len, firstMovable, lastMovable,
3151                 items = this.outline.getItems(),
3152                 selectedItem = this.outline.findSelectedItem(),
3153                 movable = this.abilities.move && selectedItem && selectedItem.isMovable(),
3154                 removable = this.abilities.remove && selectedItem && selectedItem.isRemovable();
3155
3156         if ( movable ) {
3157                 i = -1;
3158                 len = items.length;
3159                 while ( ++i < len ) {
3160                         if ( items[ i ].isMovable() ) {
3161                                 firstMovable = items[ i ];
3162                                 break;
3163                         }
3164                 }
3165                 i = len;
3166                 while ( i-- ) {
3167                         if ( items[ i ].isMovable() ) {
3168                                 lastMovable = items[ i ];
3169                                 break;
3170                         }
3171                 }
3172         }
3173         this.upButton.setDisabled( !movable || selectedItem === firstMovable );
3174         this.downButton.setDisabled( !movable || selectedItem === lastMovable );
3175         this.removeButton.setDisabled( !removable );
3176 };
3177
3178 /**
3179  * OutlineOptionWidget is an item in an {@link OO.ui.OutlineSelectWidget OutlineSelectWidget}.
3180  *
3181  * Currently, this class is only used by {@link OO.ui.BookletLayout booklet layouts}, which contain
3182  * {@link OO.ui.PageLayout page layouts}. See {@link OO.ui.BookletLayout BookletLayout}
3183  * for an example.
3184  *
3185  * @class
3186  * @extends OO.ui.DecoratedOptionWidget
3187  *
3188  * @constructor
3189  * @param {Object} [config] Configuration options
3190  * @cfg {number} [level] Indentation level
3191  * @cfg {boolean} [movable] Allow modification from {@link OO.ui.OutlineControlsWidget outline controls}.
3192  */
3193 OO.ui.OutlineOptionWidget = function OoUiOutlineOptionWidget( config ) {
3194         // Configuration initialization
3195         config = config || {};
3196
3197         // Parent constructor
3198         OO.ui.OutlineOptionWidget.parent.call( this, config );
3199
3200         // Properties
3201         this.level = 0;
3202         this.movable = !!config.movable;
3203         this.removable = !!config.removable;
3204
3205         // Initialization
3206         this.$element.addClass( 'oo-ui-outlineOptionWidget' );
3207         this.setLevel( config.level );
3208 };
3209
3210 /* Setup */
3211
3212 OO.inheritClass( OO.ui.OutlineOptionWidget, OO.ui.DecoratedOptionWidget );
3213
3214 /* Static Properties */
3215
3216 /**
3217  * @static
3218  * @inheritdoc
3219  */
3220 OO.ui.OutlineOptionWidget.static.highlightable = true;
3221
3222 /**
3223  * @static
3224  * @inheritdoc
3225  */
3226 OO.ui.OutlineOptionWidget.static.scrollIntoViewOnSelect = true;
3227
3228 /**
3229  * @static
3230  * @inheritable
3231  * @property {string}
3232  */
3233 OO.ui.OutlineOptionWidget.static.levelClass = 'oo-ui-outlineOptionWidget-level-';
3234
3235 /**
3236  * @static
3237  * @inheritable
3238  * @property {number}
3239  */
3240 OO.ui.OutlineOptionWidget.static.levels = 3;
3241
3242 /* Methods */
3243
3244 /**
3245  * Check if item is movable.
3246  *
3247  * Movability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
3248  *
3249  * @return {boolean} Item is movable
3250  */
3251 OO.ui.OutlineOptionWidget.prototype.isMovable = function () {
3252         return this.movable;
3253 };
3254
3255 /**
3256  * Check if item is removable.
3257  *
3258  * Removability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
3259  *
3260  * @return {boolean} Item is removable
3261  */
3262 OO.ui.OutlineOptionWidget.prototype.isRemovable = function () {
3263         return this.removable;
3264 };
3265
3266 /**
3267  * Get indentation level.
3268  *
3269  * @return {number} Indentation level
3270  */
3271 OO.ui.OutlineOptionWidget.prototype.getLevel = function () {
3272         return this.level;
3273 };
3274
3275 /**
3276  * @inheritdoc
3277  */
3278 OO.ui.OutlineOptionWidget.prototype.setPressed = function ( state ) {
3279         OO.ui.OutlineOptionWidget.parent.prototype.setPressed.call( this, state );
3280         return this;
3281 };
3282
3283 /**
3284  * Set movability.
3285  *
3286  * Movability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
3287  *
3288  * @param {boolean} movable Item is movable
3289  * @chainable
3290  */
3291 OO.ui.OutlineOptionWidget.prototype.setMovable = function ( movable ) {
3292         this.movable = !!movable;
3293         this.updateThemeClasses();
3294         return this;
3295 };
3296
3297 /**
3298  * Set removability.
3299  *
3300  * Removability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
3301  *
3302  * @param {boolean} removable Item is removable
3303  * @chainable
3304  */
3305 OO.ui.OutlineOptionWidget.prototype.setRemovable = function ( removable ) {
3306         this.removable = !!removable;
3307         this.updateThemeClasses();
3308         return this;
3309 };
3310
3311 /**
3312  * @inheritdoc
3313  */
3314 OO.ui.OutlineOptionWidget.prototype.setSelected = function ( state ) {
3315         OO.ui.OutlineOptionWidget.parent.prototype.setSelected.call( this, state );
3316         return this;
3317 };
3318
3319 /**
3320  * Set indentation level.
3321  *
3322  * @param {number} [level=0] Indentation level, in the range of [0,#maxLevel]
3323  * @chainable
3324  */
3325 OO.ui.OutlineOptionWidget.prototype.setLevel = function ( level ) {
3326         var levels = this.constructor.static.levels,
3327                 levelClass = this.constructor.static.levelClass,
3328                 i = levels;
3329
3330         this.level = level ? Math.max( 0, Math.min( levels - 1, level ) ) : 0;
3331         while ( i-- ) {
3332                 if ( this.level === i ) {
3333                         this.$element.addClass( levelClass + i );
3334                 } else {
3335                         this.$element.removeClass( levelClass + i );
3336                 }
3337         }
3338         this.updateThemeClasses();
3339
3340         return this;
3341 };
3342
3343 /**
3344  * OutlineSelectWidget is a structured list that contains {@link OO.ui.OutlineOptionWidget outline options}
3345  * A set of controls can be provided with an {@link OO.ui.OutlineControlsWidget outline controls} widget.
3346  *
3347  * **Currently, this class is only used by {@link OO.ui.BookletLayout booklet layouts}.**
3348  *
3349  * @class
3350  * @extends OO.ui.SelectWidget
3351  * @mixins OO.ui.mixin.TabIndexedElement
3352  *
3353  * @constructor
3354  * @param {Object} [config] Configuration options
3355  */
3356 OO.ui.OutlineSelectWidget = function OoUiOutlineSelectWidget( config ) {
3357         // Parent constructor
3358         OO.ui.OutlineSelectWidget.parent.call( this, config );
3359
3360         // Mixin constructors
3361         OO.ui.mixin.TabIndexedElement.call( this, config );
3362
3363         // Events
3364         this.$element.on( {
3365                 focus: this.bindKeyDownListener.bind( this ),
3366                 blur: this.unbindKeyDownListener.bind( this )
3367         } );
3368
3369         // Initialization
3370         this.$element.addClass( 'oo-ui-outlineSelectWidget' );
3371 };
3372
3373 /* Setup */
3374
3375 OO.inheritClass( OO.ui.OutlineSelectWidget, OO.ui.SelectWidget );
3376 OO.mixinClass( OO.ui.OutlineSelectWidget, OO.ui.mixin.TabIndexedElement );
3377
3378 /**
3379  * ButtonOptionWidget is a special type of {@link OO.ui.mixin.ButtonElement button element} that
3380  * can be selected and configured with data. The class is
3381  * used with OO.ui.ButtonSelectWidget to create a selection of button options. Please see the
3382  * [OOUI documentation on MediaWiki] [1] for more information.
3383  *
3384  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets/Selects_and_Options#Button_selects_and_options
3385  *
3386  * @class
3387  * @extends OO.ui.OptionWidget
3388  * @mixins OO.ui.mixin.ButtonElement
3389  * @mixins OO.ui.mixin.IconElement
3390  * @mixins OO.ui.mixin.IndicatorElement
3391  * @mixins OO.ui.mixin.TitledElement
3392  *
3393  * @constructor
3394  * @param {Object} [config] Configuration options
3395  */
3396 OO.ui.ButtonOptionWidget = function OoUiButtonOptionWidget( config ) {
3397         // Configuration initialization
3398         config = config || {};
3399
3400         // Parent constructor
3401         OO.ui.ButtonOptionWidget.parent.call( this, config );
3402
3403         // Mixin constructors
3404         OO.ui.mixin.ButtonElement.call( this, config );
3405         OO.ui.mixin.IconElement.call( this, config );
3406         OO.ui.mixin.IndicatorElement.call( this, config );
3407         OO.ui.mixin.TitledElement.call( this, $.extend( {}, config, { $titled: this.$button } ) );
3408
3409         // Initialization
3410         this.$element.addClass( 'oo-ui-buttonOptionWidget' );
3411         this.$button.append( this.$icon, this.$label, this.$indicator );
3412         this.$element.append( this.$button );
3413 };
3414
3415 /* Setup */
3416
3417 OO.inheritClass( OO.ui.ButtonOptionWidget, OO.ui.OptionWidget );
3418 OO.mixinClass( OO.ui.ButtonOptionWidget, OO.ui.mixin.ButtonElement );
3419 OO.mixinClass( OO.ui.ButtonOptionWidget, OO.ui.mixin.IconElement );
3420 OO.mixinClass( OO.ui.ButtonOptionWidget, OO.ui.mixin.IndicatorElement );
3421 OO.mixinClass( OO.ui.ButtonOptionWidget, OO.ui.mixin.TitledElement );
3422
3423 /* Static Properties */
3424
3425 /**
3426  * Allow button mouse down events to pass through so they can be handled by the parent select widget
3427  *
3428  * @static
3429  * @inheritdoc
3430  */
3431 OO.ui.ButtonOptionWidget.static.cancelButtonMouseDownEvents = false;
3432
3433 /**
3434  * @static
3435  * @inheritdoc
3436  */
3437 OO.ui.ButtonOptionWidget.static.highlightable = false;
3438
3439 /* Methods */
3440
3441 /**
3442  * @inheritdoc
3443  */
3444 OO.ui.ButtonOptionWidget.prototype.setSelected = function ( state ) {
3445         OO.ui.ButtonOptionWidget.parent.prototype.setSelected.call( this, state );
3446
3447         if ( this.constructor.static.selectable ) {
3448                 this.setActive( state );
3449         }
3450
3451         return this;
3452 };
3453
3454 /**
3455  * ButtonSelectWidget is a {@link OO.ui.SelectWidget select widget} that contains
3456  * button options and is used together with
3457  * OO.ui.ButtonOptionWidget. The ButtonSelectWidget provides an interface for
3458  * highlighting, choosing, and selecting mutually exclusive options. Please see
3459  * the [OOUI documentation on MediaWiki] [1] for more information.
3460  *
3461  *     @example
3462  *     // Example: A ButtonSelectWidget that contains three ButtonOptionWidgets
3463  *     var option1 = new OO.ui.ButtonOptionWidget( {
3464  *         data: 1,
3465  *         label: 'Option 1',
3466  *         title: 'Button option 1'
3467  *     } );
3468  *
3469  *     var option2 = new OO.ui.ButtonOptionWidget( {
3470  *         data: 2,
3471  *         label: 'Option 2',
3472  *         title: 'Button option 2'
3473  *     } );
3474  *
3475  *     var option3 = new OO.ui.ButtonOptionWidget( {
3476  *         data: 3,
3477  *         label: 'Option 3',
3478  *         title: 'Button option 3'
3479  *     } );
3480  *
3481  *     var buttonSelect=new OO.ui.ButtonSelectWidget( {
3482  *         items: [ option1, option2, option3 ]
3483  *     } );
3484  *     $( 'body' ).append( buttonSelect.$element );
3485  *
3486  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets/Selects_and_Options
3487  *
3488  * @class
3489  * @extends OO.ui.SelectWidget
3490  * @mixins OO.ui.mixin.TabIndexedElement
3491  *
3492  * @constructor
3493  * @param {Object} [config] Configuration options
3494  */
3495 OO.ui.ButtonSelectWidget = function OoUiButtonSelectWidget( config ) {
3496         // Parent constructor
3497         OO.ui.ButtonSelectWidget.parent.call( this, config );
3498
3499         // Mixin constructors
3500         OO.ui.mixin.TabIndexedElement.call( this, config );
3501
3502         // Events
3503         this.$element.on( {
3504                 focus: this.bindKeyDownListener.bind( this ),
3505                 blur: this.unbindKeyDownListener.bind( this )
3506         } );
3507
3508         // Initialization
3509         this.$element.addClass( 'oo-ui-buttonSelectWidget' );
3510 };
3511
3512 /* Setup */
3513
3514 OO.inheritClass( OO.ui.ButtonSelectWidget, OO.ui.SelectWidget );
3515 OO.mixinClass( OO.ui.ButtonSelectWidget, OO.ui.mixin.TabIndexedElement );
3516
3517 /**
3518  * TabOptionWidget is an item in a {@link OO.ui.TabSelectWidget TabSelectWidget}.
3519  *
3520  * Currently, this class is only used by {@link OO.ui.IndexLayout index layouts}, which contain
3521  * {@link OO.ui.TabPanelLayout tab panel layouts}. See {@link OO.ui.IndexLayout IndexLayout}
3522  * for an example.
3523  *
3524  * @class
3525  * @extends OO.ui.OptionWidget
3526  *
3527  * @constructor
3528  * @param {Object} [config] Configuration options
3529  */
3530 OO.ui.TabOptionWidget = function OoUiTabOptionWidget( config ) {
3531         // Configuration initialization
3532         config = config || {};
3533
3534         // Parent constructor
3535         OO.ui.TabOptionWidget.parent.call( this, config );
3536
3537         // Initialization
3538         this.$element
3539                 .addClass( 'oo-ui-tabOptionWidget' )
3540                 .attr( 'role', 'tab' );
3541 };
3542
3543 /* Setup */
3544
3545 OO.inheritClass( OO.ui.TabOptionWidget, OO.ui.OptionWidget );
3546
3547 /* Static Properties */
3548
3549 /**
3550  * @static
3551  * @inheritdoc
3552  */
3553 OO.ui.TabOptionWidget.static.highlightable = false;
3554
3555 /**
3556  * TabSelectWidget is a list that contains {@link OO.ui.TabOptionWidget tab options}
3557  *
3558  * **Currently, this class is only used by {@link OO.ui.IndexLayout index layouts}.**
3559  *
3560  * @class
3561  * @extends OO.ui.SelectWidget
3562  * @mixins OO.ui.mixin.TabIndexedElement
3563  *
3564  * @constructor
3565  * @param {Object} [config] Configuration options
3566  */
3567 OO.ui.TabSelectWidget = function OoUiTabSelectWidget( config ) {
3568         // Parent constructor
3569         OO.ui.TabSelectWidget.parent.call( this, config );
3570
3571         // Mixin constructors
3572         OO.ui.mixin.TabIndexedElement.call( this, config );
3573
3574         // Events
3575         this.$element.on( {
3576                 focus: this.bindKeyDownListener.bind( this ),
3577                 blur: this.unbindKeyDownListener.bind( this )
3578         } );
3579
3580         // Initialization
3581         this.$element
3582                 .addClass( 'oo-ui-tabSelectWidget' )
3583                 .attr( 'role', 'tablist' );
3584 };
3585
3586 /* Setup */
3587
3588 OO.inheritClass( OO.ui.TabSelectWidget, OO.ui.SelectWidget );
3589 OO.mixinClass( OO.ui.TabSelectWidget, OO.ui.mixin.TabIndexedElement );
3590
3591 /**
3592  * CapsuleItemWidgets are used within a {@link OO.ui.CapsuleMultiselectWidget
3593  * CapsuleMultiselectWidget} to display the selected items.
3594  *
3595  * @class
3596  * @extends OO.ui.Widget
3597  * @mixins OO.ui.mixin.ItemWidget
3598  * @mixins OO.ui.mixin.LabelElement
3599  * @mixins OO.ui.mixin.FlaggedElement
3600  * @mixins OO.ui.mixin.TabIndexedElement
3601  *
3602  * @constructor
3603  * @param {Object} [config] Configuration options
3604  * @deprecated
3605  */
3606 OO.ui.CapsuleItemWidget = function OoUiCapsuleItemWidget( config ) {
3607         // Configuration initialization
3608         config = config || {};
3609
3610         // Parent constructor
3611         OO.ui.CapsuleItemWidget.parent.call( this, config );
3612
3613         // Mixin constructors
3614         OO.ui.mixin.ItemWidget.call( this );
3615         OO.ui.mixin.LabelElement.call( this, config );
3616         OO.ui.mixin.FlaggedElement.call( this, config );
3617         OO.ui.mixin.TabIndexedElement.call( this, config );
3618
3619         // Events
3620         this.closeButton = new OO.ui.ButtonWidget( {
3621                 framed: false,
3622                 icon: 'close',
3623                 tabIndex: -1,
3624                 title: OO.ui.msg( 'ooui-item-remove' )
3625         } ).on( 'click', this.onCloseClick.bind( this ) );
3626
3627         this.on( 'disable', function ( disabled ) {
3628                 this.closeButton.setDisabled( disabled );
3629         }.bind( this ) );
3630
3631         // Initialization
3632         this.$element
3633                 .on( {
3634                         click: this.onClick.bind( this ),
3635                         keydown: this.onKeyDown.bind( this )
3636                 } )
3637                 .addClass( 'oo-ui-capsuleItemWidget' )
3638                 .append( this.$label, this.closeButton.$element );
3639 };
3640
3641 /* Setup */
3642
3643 OO.inheritClass( OO.ui.CapsuleItemWidget, OO.ui.Widget );
3644 OO.mixinClass( OO.ui.CapsuleItemWidget, OO.ui.mixin.ItemWidget );
3645 OO.mixinClass( OO.ui.CapsuleItemWidget, OO.ui.mixin.LabelElement );
3646 OO.mixinClass( OO.ui.CapsuleItemWidget, OO.ui.mixin.FlaggedElement );
3647 OO.mixinClass( OO.ui.CapsuleItemWidget, OO.ui.mixin.TabIndexedElement );
3648
3649 /* Methods */
3650
3651 /**
3652  * Handle close icon clicks
3653  */
3654 OO.ui.CapsuleItemWidget.prototype.onCloseClick = function () {
3655         var element = this.getElementGroup();
3656
3657         if ( element && $.isFunction( element.removeItems ) ) {
3658                 element.removeItems( [ this ] );
3659                 element.focus();
3660         }
3661 };
3662
3663 /**
3664  * Handle click event for the entire capsule
3665  */
3666 OO.ui.CapsuleItemWidget.prototype.onClick = function () {
3667         var element = this.getElementGroup();
3668
3669         if ( !this.isDisabled() && element && $.isFunction( element.editItem ) ) {
3670                 element.editItem( this );
3671         }
3672 };
3673
3674 /**
3675  * Handle keyDown event for the entire capsule
3676  *
3677  * @param {jQuery.Event} e Key down event
3678  */
3679 OO.ui.CapsuleItemWidget.prototype.onKeyDown = function ( e ) {
3680         var element = this.getElementGroup();
3681
3682         if ( e.keyCode === OO.ui.Keys.BACKSPACE || e.keyCode === OO.ui.Keys.DELETE ) {
3683                 element.removeItems( [ this ] );
3684                 element.focus();
3685                 return false;
3686         } else if ( e.keyCode === OO.ui.Keys.ENTER ) {
3687                 element.editItem( this );
3688                 return false;
3689         } else if ( e.keyCode === OO.ui.Keys.LEFT ) {
3690                 element.getPreviousItem( this ).focus();
3691         } else if ( e.keyCode === OO.ui.Keys.RIGHT ) {
3692                 element.getNextItem( this ).focus();
3693         }
3694 };
3695
3696 /**
3697  * CapsuleMultiselectWidgets are something like a {@link OO.ui.ComboBoxInputWidget combo box widget}
3698  * that allows for selecting multiple values.
3699  *
3700  * For more information about menus and options, please see the [OOUI documentation on MediaWiki][1].
3701  *
3702  *     @example
3703  *     // Example: A CapsuleMultiselectWidget.
3704  *     var capsule = new OO.ui.CapsuleMultiselectWidget( {
3705  *         label: 'CapsuleMultiselectWidget',
3706  *         selected: [ 'Option 1', 'Option 3' ],
3707  *         menu: {
3708  *             items: [
3709  *                 new OO.ui.MenuOptionWidget( {
3710  *                     data: 'Option 1',
3711  *                     label: 'Option One'
3712  *                 } ),
3713  *                 new OO.ui.MenuOptionWidget( {
3714  *                     data: 'Option 2',
3715  *                     label: 'Option Two'
3716  *                 } ),
3717  *                 new OO.ui.MenuOptionWidget( {
3718  *                     data: 'Option 3',
3719  *                     label: 'Option Three'
3720  *                 } ),
3721  *                 new OO.ui.MenuOptionWidget( {
3722  *                     data: 'Option 4',
3723  *                     label: 'Option Four'
3724  *                 } ),
3725  *                 new OO.ui.MenuOptionWidget( {
3726  *                     data: 'Option 5',
3727  *                     label: 'Option Five'
3728  *                 } )
3729  *             ]
3730  *         }
3731  *     } );
3732  *     $( 'body' ).append( capsule.$element );
3733  *
3734  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets/Selects_and_Options#Menu_selects_and_options
3735  *
3736  * @class
3737  * @extends OO.ui.Widget
3738  * @mixins OO.ui.mixin.GroupElement
3739  * @mixins OO.ui.mixin.PopupElement
3740  * @mixins OO.ui.mixin.TabIndexedElement
3741  * @mixins OO.ui.mixin.IndicatorElement
3742  * @mixins OO.ui.mixin.IconElement
3743  * @uses OO.ui.CapsuleItemWidget
3744  * @uses OO.ui.MenuSelectWidget
3745  *
3746  * @constructor
3747  * @param {Object} [config] Configuration options
3748  * @cfg {string} [placeholder] Placeholder text
3749  * @cfg {boolean} [allowArbitrary=false] Allow data items to be added even if not present in the menu.
3750  * @cfg {boolean} [allowDuplicates=false] Allow duplicate items to be added.
3751  * @cfg {Object} [menu] (required) Configuration options to pass to the
3752  *  {@link OO.ui.MenuSelectWidget menu select widget}.
3753  * @cfg {Object} [popup] Configuration options to pass to the {@link OO.ui.PopupWidget popup widget}.
3754  *  If specified, this popup will be shown instead of the menu (but the menu
3755  *  will still be used for item labels and allowArbitrary=false). The widgets
3756  *  in the popup should use {@link #addItemsFromData} or {@link #addItems} as necessary.
3757  * @cfg {jQuery} [$overlay=this.$element] Render the menu or popup into a separate layer.
3758  *  This configuration is useful in cases where the expanded menu is larger than
3759  *  its containing `<div>`. The specified overlay layer is usually on top of
3760  *  the containing `<div>` and has a larger area. By default, the menu uses
3761  *  relative positioning.
3762  *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
3763  * @deprecated
3764  */
3765 OO.ui.CapsuleMultiselectWidget = function OoUiCapsuleMultiselectWidget( config ) {
3766         var $tabFocus;
3767
3768         // Parent constructor
3769         OO.ui.CapsuleMultiselectWidget.parent.call( this, config );
3770
3771         // Configuration initialization
3772         config = $.extend( {
3773                 allowArbitrary: false,
3774                 allowDuplicates: false
3775         }, config );
3776
3777         // Properties (must be set before mixin constructor calls)
3778         this.$handle = $( '<div>' );
3779         this.$input = config.popup ? null : $( '<input>' );
3780         if ( config.placeholder !== undefined && config.placeholder !== '' ) {
3781                 this.$input.attr( 'placeholder', config.placeholder );
3782         }
3783
3784         // Mixin constructors
3785         OO.ui.mixin.GroupElement.call( this, config );
3786         if ( config.popup ) {
3787                 config.popup = $.extend( {}, config.popup, {
3788                         align: 'forwards',
3789                         anchor: false
3790                 } );
3791                 OO.ui.mixin.PopupElement.call( this, config );
3792                 $tabFocus = $( '<span>' );
3793                 OO.ui.mixin.TabIndexedElement.call( this, $.extend( {}, config, { $tabIndexed: $tabFocus } ) );
3794         } else {
3795                 this.popup = null;
3796                 $tabFocus = null;
3797                 OO.ui.mixin.TabIndexedElement.call( this, $.extend( {}, config, { $tabIndexed: this.$input } ) );
3798         }
3799         OO.ui.mixin.IndicatorElement.call( this, config );
3800         OO.ui.mixin.IconElement.call( this, config );
3801
3802         // Properties
3803         this.$content = $( '<div>' );
3804         this.allowArbitrary = config.allowArbitrary;
3805         this.allowDuplicates = config.allowDuplicates;
3806         this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;
3807         this.menu = new OO.ui.MenuSelectWidget( $.extend(
3808                 {
3809                         widget: this,
3810                         $input: this.$input,
3811                         $floatableContainer: this.$element,
3812                         filterFromInput: true,
3813                         disabled: this.isDisabled()
3814                 },
3815                 config.menu
3816         ) );
3817
3818         // Events
3819         if ( this.popup ) {
3820                 $tabFocus.on( {
3821                         focus: this.focus.bind( this )
3822                 } );
3823                 this.popup.$element.on( 'focusout', this.onPopupFocusOut.bind( this ) );
3824                 if ( this.popup.$autoCloseIgnore ) {
3825                         this.popup.$autoCloseIgnore.on( 'focusout', this.onPopupFocusOut.bind( this ) );
3826                 }
3827                 this.popup.connect( this, {
3828                         toggle: function ( visible ) {
3829                                 $tabFocus.toggle( !visible );
3830                         }
3831                 } );
3832         } else {
3833                 this.$input.on( {
3834                         focus: this.onInputFocus.bind( this ),
3835                         blur: this.onInputBlur.bind( this ),
3836                         'propertychange change click mouseup keydown keyup input cut paste select focus':
3837                                 OO.ui.debounce( this.updateInputSize.bind( this ) ),
3838                         keydown: this.onKeyDown.bind( this ),
3839                         keypress: this.onKeyPress.bind( this )
3840                 } );
3841         }
3842         this.menu.connect( this, {
3843                 choose: 'onMenuChoose',
3844                 toggle: 'onMenuToggle',
3845                 add: 'onMenuItemsChange',
3846                 remove: 'onMenuItemsChange'
3847         } );
3848         this.$handle.on( {
3849                 mousedown: this.onMouseDown.bind( this )
3850         } );
3851
3852         // Initialization
3853         if ( this.$input ) {
3854                 this.$input.prop( 'disabled', this.isDisabled() );
3855                 this.$input.attr( {
3856                         role: 'combobox',
3857                         'aria-owns': this.menu.getElementId(),
3858                         'aria-autocomplete': 'list'
3859                 } );
3860         }
3861         if ( config.data ) {
3862                 this.setItemsFromData( config.data );
3863         }
3864         this.$content.addClass( 'oo-ui-capsuleMultiselectWidget-content' )
3865                 .append( this.$group );
3866         this.$group.addClass( 'oo-ui-capsuleMultiselectWidget-group' );
3867         this.$handle.addClass( 'oo-ui-capsuleMultiselectWidget-handle' )
3868                 .append( this.$indicator, this.$icon, this.$content );
3869         this.$element.addClass( 'oo-ui-capsuleMultiselectWidget' )
3870                 .append( this.$handle );
3871         if ( this.popup ) {
3872                 this.popup.$element.addClass( 'oo-ui-capsuleMultiselectWidget-popup' );
3873                 this.$content.append( $tabFocus );
3874                 this.$overlay.append( this.popup.$element );
3875         } else {
3876                 this.$content.append( this.$input );
3877                 this.$overlay.append( this.menu.$element );
3878         }
3879         if ( $tabFocus ) {
3880                 $tabFocus.addClass( 'oo-ui-capsuleMultiselectWidget-focusTrap' );
3881         }
3882
3883         // Input size needs to be calculated after everything else is rendered
3884         setTimeout( function () {
3885                 if ( this.$input ) {
3886                         this.updateInputSize();
3887                 }
3888         }.bind( this ) );
3889
3890         this.onMenuItemsChange();
3891
3892         // Deprecation warning
3893         OO.ui.warnDeprecation( 'CapsuleMultiselectWidget: Deprecated widget. Use TagMultiselectWidget instead. See T183299.' );
3894 };
3895
3896 /* Setup */
3897
3898 OO.inheritClass( OO.ui.CapsuleMultiselectWidget, OO.ui.Widget );
3899 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.GroupElement );
3900 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.PopupElement );
3901 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.TabIndexedElement );
3902 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.IndicatorElement );
3903 OO.mixinClass( OO.ui.CapsuleMultiselectWidget, OO.ui.mixin.IconElement );
3904
3905 /* Events */
3906
3907 /**
3908  * @event change
3909  *
3910  * A change event is emitted when the set of selected items changes.
3911  *
3912  * @param {Mixed[]} datas Data of the now-selected items
3913  */
3914
3915 /**
3916  * @event resize
3917  *
3918  * A resize event is emitted when the widget's dimensions change to accomodate newly added items or
3919  * current user input.
3920  */
3921
3922 /* Methods */
3923
3924 /**
3925  * Construct a OO.ui.CapsuleItemWidget (or a subclass thereof) from given label and data.
3926  * May return `null` if the given label and data are not valid.
3927  *
3928  * @protected
3929  * @param {Mixed} data Custom data of any type.
3930  * @param {string} label The label text.
3931  * @return {OO.ui.CapsuleItemWidget|null}
3932  */
3933 OO.ui.CapsuleMultiselectWidget.prototype.createItemWidget = function ( data, label ) {
3934         if ( label === '' ) {
3935                 return null;
3936         }
3937         return new OO.ui.CapsuleItemWidget( { data: data, label: label } );
3938 };
3939
3940 /**
3941  * @inheritdoc
3942  */
3943 OO.ui.CapsuleMultiselectWidget.prototype.getInputId = function () {
3944         if ( !this.$input ) {
3945                 return null;
3946         }
3947         return OO.ui.mixin.TabIndexedElement.prototype.getInputId.call( this );
3948 };
3949
3950 /**
3951  * Get the data of the items in the capsule
3952  *
3953  * @return {Mixed[]}
3954  */
3955 OO.ui.CapsuleMultiselectWidget.prototype.getItemsData = function () {
3956         return this.getItems().map( function ( item ) {
3957                 return item.data;
3958         } );
3959 };
3960
3961 /**
3962  * Set the items in the capsule by providing data
3963  *
3964  * @chainable
3965  * @param {Mixed[]} datas
3966  * @return {OO.ui.CapsuleMultiselectWidget}
3967  */
3968 OO.ui.CapsuleMultiselectWidget.prototype.setItemsFromData = function ( datas ) {
3969         var widget = this,
3970                 menu = this.menu,
3971                 items = this.getItems();
3972
3973         $.each( datas, function ( i, data ) {
3974                 var j, label,
3975                         item = menu.findItemFromData( data );
3976
3977                 if ( item ) {
3978                         label = item.label;
3979                 } else if ( widget.allowArbitrary ) {
3980                         label = String( data );
3981                 } else {
3982                         return;
3983                 }
3984
3985                 item = null;
3986                 for ( j = 0; j < items.length; j++ ) {
3987                         if ( items[ j ].data === data && items[ j ].label === label ) {
3988                                 item = items[ j ];
3989                                 items.splice( j, 1 );
3990                                 break;
3991                         }
3992                 }
3993                 if ( !item ) {
3994                         item = widget.createItemWidget( data, label );
3995                 }
3996                 if ( item ) {
3997                         widget.addItems( [ item ], i );
3998                 }
3999         } );
4000
4001         if ( items.length ) {
4002                 widget.removeItems( items );
4003         }
4004
4005         return this;
4006 };
4007
4008 /**
4009  * Add items to the capsule by providing their data
4010  *
4011  * @chainable
4012  * @param {Mixed[]} datas
4013  * @return {OO.ui.CapsuleMultiselectWidget}
4014  */
4015 OO.ui.CapsuleMultiselectWidget.prototype.addItemsFromData = function ( datas ) {
4016         var widget = this,
4017                 menu = this.menu,
4018                 items = [];
4019
4020         $.each( datas, function ( i, data ) {
4021                 var item;
4022
4023                 if ( !widget.findItemFromData( data ) || widget.allowDuplicates ) {
4024                         item = menu.findItemFromData( data );
4025                         if ( item ) {
4026                                 item = widget.createItemWidget( data, item.label );
4027                         } else if ( widget.allowArbitrary ) {
4028                                 item = widget.createItemWidget( data, String( data ) );
4029                         }
4030                         if ( item ) {
4031                                 items.push( item );
4032                         }
4033                 }
4034         } );
4035
4036         if ( items.length ) {
4037                 this.addItems( items );
4038         }
4039
4040         return this;
4041 };
4042
4043 /**
4044  * Add items to the capsule by providing a label
4045  *
4046  * @param {string} label
4047  * @return {boolean} Whether the item was added or not
4048  */
4049 OO.ui.CapsuleMultiselectWidget.prototype.addItemFromLabel = function ( label ) {
4050         var item, items;
4051         item = this.menu.getItemFromLabel( label, true );
4052         if ( item ) {
4053                 this.addItemsFromData( [ item.data ] );
4054                 return true;
4055         } else if ( this.allowArbitrary ) {
4056                 items = this.getItems();
4057                 this.addItemsFromData( [ label ] );
4058                 return !OO.compare( this.getItems(), items );
4059         }
4060         return false;
4061 };
4062
4063 /**
4064  * Remove items by data
4065  *
4066  * @chainable
4067  * @param {Mixed[]} datas
4068  * @return {OO.ui.CapsuleMultiselectWidget}
4069  */
4070 OO.ui.CapsuleMultiselectWidget.prototype.removeItemsFromData = function ( datas ) {
4071         var widget = this,
4072                 items = [];
4073
4074         $.each( datas, function ( i, data ) {
4075                 var item = widget.findItemFromData( data );
4076                 if ( item ) {
4077                         items.push( item );
4078                 }
4079         } );
4080
4081         if ( items.length ) {
4082                 this.removeItems( items );
4083         }
4084
4085         return this;
4086 };
4087
4088 /**
4089  * @inheritdoc
4090  */
4091 OO.ui.CapsuleMultiselectWidget.prototype.addItems = function ( items ) {
4092         var same, i, l,
4093                 oldItems = this.items.slice();
4094
4095         OO.ui.mixin.GroupElement.prototype.addItems.call( this, items );
4096
4097         if ( this.items.length !== oldItems.length ) {
4098                 same = false;
4099         } else {
4100                 same = true;
4101                 for ( i = 0, l = oldItems.length; same && i < l; i++ ) {
4102                         same = same && this.items[ i ] === oldItems[ i ];
4103                 }
4104         }
4105         if ( !same ) {
4106                 this.emit( 'change', this.getItemsData() );
4107                 this.updateInputSize();
4108         }
4109
4110         return this;
4111 };
4112
4113 /**
4114  * Removes the item from the list and copies its label to `this.$input`.
4115  *
4116  * @param {Object} item
4117  */
4118 OO.ui.CapsuleMultiselectWidget.prototype.editItem = function ( item ) {
4119         this.addItemFromLabel( this.$input.val() );
4120         this.clearInput();
4121         this.$input.val( item.label );
4122         this.updateInputSize();
4123         this.focus();
4124         this.menu.updateItemVisibility(); // Hack, we shouldn't be calling this method directly
4125         this.removeItems( [ item ] );
4126 };
4127
4128 /**
4129  * @inheritdoc
4130  */
4131 OO.ui.CapsuleMultiselectWidget.prototype.removeItems = function ( items ) {
4132         var same, i, l,
4133                 oldItems = this.items.slice();
4134
4135         OO.ui.mixin.GroupElement.prototype.removeItems.call( this, items );
4136
4137         if ( this.items.length !== oldItems.length ) {
4138                 same = false;
4139         } else {
4140                 same = true;
4141                 for ( i = 0, l = oldItems.length; same && i < l; i++ ) {
4142                         same = same && this.items[ i ] === oldItems[ i ];
4143                 }
4144         }
4145         if ( !same ) {
4146                 this.emit( 'change', this.getItemsData() );
4147                 this.updateInputSize();
4148         }
4149
4150         return this;
4151 };
4152
4153 /**
4154  * @inheritdoc
4155  */
4156 OO.ui.CapsuleMultiselectWidget.prototype.clearItems = function () {
4157         if ( this.items.length ) {
4158                 OO.ui.mixin.GroupElement.prototype.clearItems.call( this );
4159                 this.emit( 'change', this.getItemsData() );
4160                 this.updateInputSize();
4161         }
4162         return this;
4163 };
4164
4165 /**
4166  * Given an item, returns the item after it. If its the last item,
4167  * returns `this.$input`. If no item is passed, returns the very first
4168  * item.
4169  *
4170  * @param {OO.ui.CapsuleItemWidget} [item]
4171  * @return {OO.ui.CapsuleItemWidget|jQuery|boolean}
4172  */
4173 OO.ui.CapsuleMultiselectWidget.prototype.getNextItem = function ( item ) {
4174         var itemIndex;
4175
4176         if ( item === undefined ) {
4177                 return this.items[ 0 ];
4178         }
4179
4180         itemIndex = this.items.indexOf( item );
4181         if ( itemIndex < 0 ) { // Item not in list
4182                 return false;
4183         } else if ( itemIndex === this.items.length - 1 ) { // Last item
4184                 return this.$input;
4185         } else {
4186                 return this.items[ itemIndex + 1 ];
4187         }
4188 };
4189
4190 /**
4191  * Given an item, returns the item before it. If its the first item,
4192  * returns `this.$input`. If no item is passed, returns the very last
4193  * item.
4194  *
4195  * @param {OO.ui.CapsuleItemWidget} [item]
4196  * @return {OO.ui.CapsuleItemWidget|jQuery|boolean}
4197  */
4198 OO.ui.CapsuleMultiselectWidget.prototype.getPreviousItem = function ( item ) {
4199         var itemIndex;
4200
4201         if ( item === undefined ) {
4202                 return this.items[ this.items.length - 1 ];
4203         }
4204
4205         itemIndex = this.items.indexOf( item );
4206         if ( itemIndex < 0 ) { // Item not in list
4207                 return false;
4208         } else if ( itemIndex === 0 ) { // First item
4209                 return this.$input;
4210         } else {
4211                 return this.items[ itemIndex - 1 ];
4212         }
4213 };
4214
4215 /**
4216  * Get the capsule widget's menu.
4217  *
4218  * @return {OO.ui.MenuSelectWidget} Menu widget
4219  */
4220 OO.ui.CapsuleMultiselectWidget.prototype.getMenu = function () {
4221         return this.menu;
4222 };
4223
4224 /**
4225  * Handle focus events
4226  *
4227  * @private
4228  * @param {jQuery.Event} event
4229  */
4230 OO.ui.CapsuleMultiselectWidget.prototype.onInputFocus = function () {
4231         if ( !this.isDisabled() ) {
4232                 this.updateInputSize();
4233                 this.menu.toggle( true );
4234         }
4235 };
4236
4237 /**
4238  * Handle blur events
4239  *
4240  * @private
4241  * @param {jQuery.Event} event
4242  */
4243 OO.ui.CapsuleMultiselectWidget.prototype.onInputBlur = function () {
4244         this.addItemFromLabel( this.$input.val() );
4245         this.clearInput();
4246 };
4247
4248 /**
4249  * Handles popup focus out events.
4250  *
4251  * @private
4252  * @param {jQuery.Event} e Focus out event
4253  */
4254 OO.ui.CapsuleMultiselectWidget.prototype.onPopupFocusOut = function () {
4255         var widget = this.popup;
4256
4257         setTimeout( function () {
4258                 if (
4259                         widget.isVisible() &&
4260                         !OO.ui.contains( widget.$element.add( widget.$autoCloseIgnore ).get(), document.activeElement, true )
4261                 ) {
4262                         widget.toggle( false );
4263                 }
4264         } );
4265 };
4266
4267 /**
4268  * Handle mouse down events.
4269  *
4270  * @private
4271  * @param {jQuery.Event} e Mouse down event
4272  */
4273 OO.ui.CapsuleMultiselectWidget.prototype.onMouseDown = function ( e ) {
4274         if ( e.which === OO.ui.MouseButtons.LEFT ) {
4275                 this.focus();
4276                 return false;
4277         } else {
4278                 this.updateInputSize();
4279         }
4280 };
4281
4282 /**
4283  * Handle key press events.
4284  *
4285  * @private
4286  * @param {jQuery.Event} e Key press event
4287  */
4288 OO.ui.CapsuleMultiselectWidget.prototype.onKeyPress = function ( e ) {
4289         if ( !this.isDisabled() ) {
4290                 if ( e.which === OO.ui.Keys.ESCAPE ) {
4291                         this.clearInput();
4292                         return false;
4293                 }
4294
4295                 if ( !this.popup ) {
4296                         this.menu.toggle( true );
4297                         if ( e.which === OO.ui.Keys.ENTER ) {
4298                                 if ( this.addItemFromLabel( this.$input.val() ) ) {
4299                                         this.clearInput();
4300                                 }
4301                                 return false;
4302                         }
4303
4304                         // Make sure the input gets resized.
4305                         setTimeout( this.updateInputSize.bind( this ), 0 );
4306                 }
4307         }
4308 };
4309
4310 /**
4311  * Handle key down events.
4312  *
4313  * @private
4314  * @param {jQuery.Event} e Key down event
4315  */
4316 OO.ui.CapsuleMultiselectWidget.prototype.onKeyDown = function ( e ) {
4317         if (
4318                 !this.isDisabled() &&
4319                 this.$input.val() === '' &&
4320                 this.items.length
4321         ) {
4322                 // 'keypress' event is not triggered for Backspace
4323                 if ( e.keyCode === OO.ui.Keys.BACKSPACE ) {
4324                         if ( e.metaKey || e.ctrlKey ) {
4325                                 this.removeItems( this.items.slice( -1 ) );
4326                         } else {
4327                                 this.editItem( this.items[ this.items.length - 1 ] );
4328                         }
4329                         return false;
4330                 } else if ( e.keyCode === OO.ui.Keys.LEFT ) {
4331                         this.getPreviousItem().focus();
4332                 } else if ( e.keyCode === OO.ui.Keys.RIGHT ) {
4333                         this.getNextItem().focus();
4334                 }
4335         }
4336 };
4337
4338 /**
4339  * Update the dimensions of the text input field to encompass all available area.
4340  *
4341  * @private
4342  * @param {jQuery.Event} e Event of some sort
4343  */
4344 OO.ui.CapsuleMultiselectWidget.prototype.updateInputSize = function () {
4345         var $lastItem, direction, contentWidth, currentWidth, bestWidth;
4346         if ( this.$input && !this.isDisabled() ) {
4347                 this.$input.css( 'width', '1em' );
4348                 $lastItem = this.$group.children().last();
4349                 direction = OO.ui.Element.static.getDir( this.$handle );
4350
4351                 // Get the width of the input with the placeholder text as
4352                 // the value and save it so that we don't keep recalculating
4353                 if (
4354                         this.contentWidthWithPlaceholder === undefined &&
4355                         this.$input.val() === '' &&
4356                         this.$input.attr( 'placeholder' ) !== undefined
4357                 ) {
4358                         this.$input.val( this.$input.attr( 'placeholder' ) );
4359                         this.contentWidthWithPlaceholder = this.$input[ 0 ].scrollWidth;
4360                         this.$input.val( '' );
4361
4362                 }
4363
4364                 // Always keep the input wide enough for the placeholder text
4365                 contentWidth = Math.max(
4366                         this.$input[ 0 ].scrollWidth,
4367                         // undefined arguments in Math.max lead to NaN
4368                         ( this.contentWidthWithPlaceholder === undefined ) ?
4369                                 0 : this.contentWidthWithPlaceholder
4370                 );
4371                 currentWidth = this.$input.width();
4372
4373                 if ( contentWidth < currentWidth ) {
4374                         this.updateIfHeightChanged();
4375                         // All is fine, don't perform expensive calculations
4376                         return;
4377                 }
4378
4379                 if ( $lastItem.length === 0 ) {
4380                         bestWidth = this.$content.innerWidth();
4381                 } else {
4382                         bestWidth = direction === 'ltr' ?
4383                                 this.$content.innerWidth() - $lastItem.position().left - $lastItem.outerWidth() :
4384                                 $lastItem.position().left;
4385                 }
4386
4387                 // Some safety margin for sanity, because I *really* don't feel like finding out where the few
4388                 // pixels this is off by are coming from.
4389                 bestWidth -= 10;
4390                 if ( contentWidth > bestWidth ) {
4391                         // This will result in the input getting shifted to the next line
4392                         bestWidth = this.$content.innerWidth() - 10;
4393                 }
4394                 this.$input.width( Math.floor( bestWidth ) );
4395                 this.updateIfHeightChanged();
4396         } else {
4397                 this.updateIfHeightChanged();
4398         }
4399 };
4400
4401 /**
4402  * Determine if widget height changed, and if so, update menu position and emit 'resize' event.
4403  *
4404  * @private
4405  */
4406 OO.ui.CapsuleMultiselectWidget.prototype.updateIfHeightChanged = function () {
4407         var height = this.$element.height();
4408         if ( height !== this.height ) {
4409                 this.height = height;
4410                 this.menu.position();
4411                 if ( this.popup ) {
4412                         this.popup.updateDimensions();
4413                 }
4414                 this.emit( 'resize' );
4415         }
4416 };
4417
4418 /**
4419  * Handle menu choose events.
4420  *
4421  * @private
4422  * @param {OO.ui.OptionWidget} item Chosen item
4423  */
4424 OO.ui.CapsuleMultiselectWidget.prototype.onMenuChoose = function ( item ) {
4425         if ( item && item.isVisible() ) {
4426                 this.addItemsFromData( [ item.getData() ] );
4427                 this.clearInput();
4428         }
4429 };
4430
4431 /**
4432  * Handle menu toggle events.
4433  *
4434  * @private
4435  * @param {boolean} isVisible Open state of the menu
4436  */
4437 OO.ui.CapsuleMultiselectWidget.prototype.onMenuToggle = function ( isVisible ) {
4438         this.$element.toggleClass( 'oo-ui-capsuleMultiselectWidget-open', isVisible );
4439 };
4440
4441 /**
4442  * Handle menu item change events.
4443  *
4444  * @private
4445  */
4446 OO.ui.CapsuleMultiselectWidget.prototype.onMenuItemsChange = function () {
4447         this.setItemsFromData( this.getItemsData() );
4448         this.$element.toggleClass( 'oo-ui-capsuleMultiselectWidget-empty', this.menu.isEmpty() );
4449 };
4450
4451 /**
4452  * Clear the input field
4453  *
4454  * @private
4455  */
4456 OO.ui.CapsuleMultiselectWidget.prototype.clearInput = function () {
4457         if ( this.$input ) {
4458                 this.$input.val( '' );
4459                 this.updateInputSize();
4460         }
4461         if ( this.popup ) {
4462                 this.popup.toggle( false );
4463         }
4464         this.menu.toggle( false );
4465         this.menu.selectItem();
4466         this.menu.highlightItem();
4467 };
4468
4469 /**
4470  * @inheritdoc
4471  */
4472 OO.ui.CapsuleMultiselectWidget.prototype.setDisabled = function ( disabled ) {
4473         var i, len;
4474
4475         // Parent method
4476         OO.ui.CapsuleMultiselectWidget.parent.prototype.setDisabled.call( this, disabled );
4477
4478         if ( this.$input ) {
4479                 this.$input.prop( 'disabled', this.isDisabled() );
4480         }
4481         if ( this.menu ) {
4482                 this.menu.setDisabled( this.isDisabled() );
4483         }
4484         if ( this.popup ) {
4485                 this.popup.setDisabled( this.isDisabled() );
4486         }
4487
4488         if ( this.items ) {
4489                 for ( i = 0, len = this.items.length; i < len; i++ ) {
4490                         this.items[ i ].updateDisabled();
4491                 }
4492         }
4493
4494         return this;
4495 };
4496
4497 /**
4498  * Focus the widget
4499  *
4500  * @chainable
4501  */
4502 OO.ui.CapsuleMultiselectWidget.prototype.focus = function () {
4503         if ( !this.isDisabled() ) {
4504                 if ( this.popup ) {
4505                         this.popup.setSize( this.$handle.outerWidth() );
4506                         this.popup.toggle( true );
4507                         OO.ui.findFocusable( this.popup.$element ).focus();
4508                 } else {
4509                         OO.ui.mixin.TabIndexedElement.prototype.focus.call( this );
4510                 }
4511         }
4512         return this;
4513 };
4514
4515 /**
4516  * TagItemWidgets are used within a {@link OO.ui.TagMultiselectWidget
4517  * TagMultiselectWidget} to display the selected items.
4518  *
4519  * @class
4520  * @extends OO.ui.Widget
4521  * @mixins OO.ui.mixin.ItemWidget
4522  * @mixins OO.ui.mixin.LabelElement
4523  * @mixins OO.ui.mixin.FlaggedElement
4524  * @mixins OO.ui.mixin.TabIndexedElement
4525  * @mixins OO.ui.mixin.DraggableElement
4526  *
4527  * @constructor
4528  * @param {Object} [config] Configuration object
4529  * @cfg {boolean} [valid=true] Item is valid
4530  * @cfg {boolean} [fixed] Item is fixed. This means the item is
4531  *  always included in the values and cannot be removed.
4532  */
4533 OO.ui.TagItemWidget = function OoUiTagItemWidget( config ) {
4534         config = config || {};
4535
4536         // Parent constructor
4537         OO.ui.TagItemWidget.parent.call( this, config );
4538
4539         // Mixin constructors
4540         OO.ui.mixin.ItemWidget.call( this );
4541         OO.ui.mixin.LabelElement.call( this, config );
4542         OO.ui.mixin.FlaggedElement.call( this, config );
4543         OO.ui.mixin.TabIndexedElement.call( this, config );
4544         OO.ui.mixin.DraggableElement.call( this, config );
4545
4546         this.valid = config.valid === undefined ? true : !!config.valid;
4547         this.fixed = !!config.fixed;
4548
4549         this.closeButton = new OO.ui.ButtonWidget( {
4550                 framed: false,
4551                 icon: 'close',
4552                 tabIndex: -1,
4553                 title: OO.ui.msg( 'ooui-item-remove' )
4554         } );
4555         this.closeButton.setDisabled( this.isDisabled() );
4556
4557         // Events
4558         this.closeButton
4559                 .connect( this, { click: 'remove' } );
4560         this.$element
4561                 .on( 'click', this.select.bind( this ) )
4562                 .on( 'keydown', this.onKeyDown.bind( this ) )
4563                 // Prevent propagation of mousedown; the tag item "lives" in the
4564                 // clickable area of the TagMultiselectWidget, which listens to
4565                 // mousedown to open the menu or popup. We want to prevent that
4566                 // for clicks specifically on the tag itself, so the actions taken
4567                 // are more deliberate. When the tag is clicked, it will emit the
4568                 // selection event (similar to how #OO.ui.MultioptionWidget emits 'change')
4569                 // and can be handled separately.
4570                 .on( 'mousedown', function ( e ) { e.stopPropagation(); } );
4571
4572         // Initialization
4573         this.$element
4574                 .addClass( 'oo-ui-tagItemWidget' )
4575                 .append( this.$label, this.closeButton.$element );
4576 };
4577
4578 /* Initialization */
4579
4580 OO.inheritClass( OO.ui.TagItemWidget, OO.ui.Widget );
4581 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.ItemWidget );
4582 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.LabelElement );
4583 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.FlaggedElement );
4584 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.TabIndexedElement );
4585 OO.mixinClass( OO.ui.TagItemWidget, OO.ui.mixin.DraggableElement );
4586
4587 /* Events */
4588
4589 /**
4590  * @event remove
4591  *
4592  * A remove action was performed on the item
4593  */
4594
4595 /**
4596  * @event navigate
4597  * @param {string} direction Direction of the movement, forward or backwards
4598  *
4599  * A navigate action was performed on the item
4600  */
4601
4602 /**
4603  * @event select
4604  *
4605  * The tag widget was selected. This can occur when the widget
4606  * is either clicked or enter was pressed on it.
4607  */
4608
4609 /**
4610  * @event valid
4611  * @param {boolean} isValid Item is valid
4612  *
4613  * Item validity has changed
4614  */
4615
4616 /**
4617  * @event fixed
4618  * @param {boolean} isFixed Item is fixed
4619  *
4620  * Item fixed state has changed
4621  */
4622
4623 /* Methods */
4624
4625 /**
4626  * Set this item as fixed, meaning it cannot be removed
4627  *
4628  * @param {string} [state] Item is fixed
4629  * @fires fixed
4630  */
4631 OO.ui.TagItemWidget.prototype.setFixed = function ( state ) {
4632         state = state === undefined ? !this.fixed : !!state;
4633
4634         if ( this.fixed !== state ) {
4635                 this.fixed = state;
4636                 if ( this.closeButton ) {
4637                         this.closeButton.toggle( !this.fixed );
4638                 }
4639
4640                 if ( !this.fixed && this.elementGroup && !this.elementGroup.isDraggable() ) {
4641                         // Only enable the state of the item if the
4642                         // entire group is draggable
4643                         this.toggleDraggable( !this.fixed );
4644                 }
4645                 this.$element.toggleClass( 'oo-ui-tagItemWidget-fixed', this.fixed );
4646
4647                 this.emit( 'fixed', this.isFixed() );
4648         }
4649         return this;
4650 };
4651
4652 /**
4653  * Check whether the item is fixed
4654  */
4655 OO.ui.TagItemWidget.prototype.isFixed = function () {
4656         return this.fixed;
4657 };
4658
4659 /**
4660  * @inheritdoc
4661  */
4662 OO.ui.TagItemWidget.prototype.setDisabled = function ( state ) {
4663         if ( state && this.elementGroup && !this.elementGroup.isDisabled() ) {
4664                 OO.ui.warnDeprecation( 'TagItemWidget#setDisabled: Disabling individual items is deprecated and will result in inconsistent behavior. Use #setFixed instead. See T193571.' );
4665         }
4666         // Parent method
4667         OO.ui.TagItemWidget.parent.prototype.setDisabled.call( this, state );
4668         if (
4669                 !state &&
4670                 // Verify we have a group, and that the widget is ready
4671                 this.toggleDraggable && this.elementGroup &&
4672                 !this.isFixed() &&
4673                 !this.elementGroup.isDraggable()
4674         ) {
4675                 // Only enable the draggable state of the item if the
4676                 // entire group is draggable to begin with, and if the
4677                 // item is not fixed
4678                 this.toggleDraggable( !state );
4679         }
4680
4681         if ( this.closeButton ) {
4682                 this.closeButton.setDisabled( state );
4683         }
4684
4685         return this;
4686 };
4687
4688 /**
4689  * Handle removal of the item
4690  *
4691  * This is mainly for extensibility concerns, so other children
4692  * of this class can change the behavior if they need to. This
4693  * is called by both clicking the 'remove' button but also
4694  * on keypress, which is harder to override if needed.
4695  *
4696  * @fires remove
4697  */
4698 OO.ui.TagItemWidget.prototype.remove = function () {
4699         if ( !this.isDisabled() && !this.isFixed() ) {
4700                 this.emit( 'remove' );
4701         }
4702 };
4703
4704 /**
4705  * Handle a keydown event on the widget
4706  *
4707  * @fires navigate
4708  * @fires remove
4709  * @param {jQuery.Event} e Key down event
4710  * @return {boolean|undefined} false to stop the operation
4711  */
4712 OO.ui.TagItemWidget.prototype.onKeyDown = function ( e ) {
4713         var movement;
4714
4715         if ( !this.isDisabled() && !this.isFixed() && e.keyCode === OO.ui.Keys.BACKSPACE || e.keyCode === OO.ui.Keys.DELETE ) {
4716                 this.remove();
4717                 return false;
4718         } else if ( e.keyCode === OO.ui.Keys.ENTER ) {
4719                 this.select();
4720                 return false;
4721         } else if (
4722                 e.keyCode === OO.ui.Keys.LEFT ||
4723                 e.keyCode === OO.ui.Keys.RIGHT
4724         ) {
4725                 if ( OO.ui.Element.static.getDir( this.$element ) === 'rtl' ) {
4726                         movement = {
4727                                 left: 'forwards',
4728                                 right: 'backwards'
4729                         };
4730                 } else {
4731                         movement = {
4732                                 left: 'backwards',
4733                                 right: 'forwards'
4734                         };
4735                 }
4736
4737                 this.emit(
4738                         'navigate',
4739                         e.keyCode === OO.ui.Keys.LEFT ?
4740                                 movement.left : movement.right
4741                 );
4742                 return false;
4743         }
4744 };
4745
4746 /**
4747  * Select this item
4748  *
4749  * @fires select
4750  */
4751 OO.ui.TagItemWidget.prototype.select = function () {
4752         if ( !this.isDisabled() ) {
4753                 this.emit( 'select' );
4754         }
4755 };
4756
4757 /**
4758  * Set the valid state of this item
4759  *
4760  * @param {boolean} [valid] Item is valid
4761  * @fires valid
4762  */
4763 OO.ui.TagItemWidget.prototype.toggleValid = function ( valid ) {
4764         valid = valid === undefined ? !this.valid : !!valid;
4765
4766         if ( this.valid !== valid ) {
4767                 this.valid = valid;
4768
4769                 this.setFlags( { invalid: !this.valid } );
4770
4771                 this.emit( 'valid', this.valid );
4772         }
4773 };
4774
4775 /**
4776  * Check whether the item is valid
4777  *
4778  * @return {boolean} Item is valid
4779  */
4780 OO.ui.TagItemWidget.prototype.isValid = function () {
4781         return this.valid;
4782 };
4783
4784 /**
4785  * A basic tag multiselect widget, similar in concept to {@link OO.ui.ComboBoxInputWidget combo box widget}
4786  * that allows the user to add multiple values that are displayed in a tag area.
4787  *
4788  * This widget is a base widget; see {@link OO.ui.MenuTagMultiselectWidget MenuTagMultiselectWidget} and
4789  * {@link OO.ui.PopupTagMultiselectWidget PopupTagMultiselectWidget} for the implementations that use
4790  * a menu and a popup respectively.
4791  *
4792  *     @example
4793  *     // Example: A basic TagMultiselectWidget.
4794  *     var widget = new OO.ui.TagMultiselectWidget( {
4795  *         inputPosition: 'outline',
4796  *         allowedValues: [ 'Option 1', 'Option 2', 'Option 3' ],
4797  *         selected: [ 'Option 1' ]
4798  *     } );
4799  *     $( 'body' ).append( widget.$element );
4800  *
4801  * @class
4802  * @extends OO.ui.Widget
4803  * @mixins OO.ui.mixin.GroupWidget
4804  * @mixins OO.ui.mixin.DraggableGroupElement
4805  * @mixins OO.ui.mixin.IndicatorElement
4806  * @mixins OO.ui.mixin.IconElement
4807  * @mixins OO.ui.mixin.TabIndexedElement
4808  * @mixins OO.ui.mixin.FlaggedElement
4809  *
4810  * @constructor
4811  * @param {Object} config Configuration object
4812  * @cfg {Object} [input] Configuration options for the input widget
4813  * @cfg {OO.ui.InputWidget} [inputWidget] An optional input widget. If given, it will
4814  *  replace the input widget used in the TagMultiselectWidget. If not given,
4815  *  TagMultiselectWidget creates its own.
4816  * @cfg {boolean} [inputPosition='inline'] Position of the input. Options are:
4817  *      - inline: The input is invisible, but exists inside the tag list, so
4818  *              the user types into the tag groups to add tags.
4819  *      - outline: The input is underneath the tag area.
4820  *      - none: No input supplied
4821  * @cfg {boolean} [allowEditTags=true] Allow editing of the tags by clicking them
4822  * @cfg {boolean} [allowArbitrary=false] Allow data items to be added even if
4823  *  not present in the menu.
4824  * @cfg {Object[]} [allowedValues] An array representing the allowed items
4825  *  by their datas.
4826  * @cfg {boolean} [allowDuplicates=false] Allow duplicate items to be added
4827  * @cfg {boolean} [allowDisplayInvalidTags=false] Allow the display of
4828  *  invalid tags. These tags will display with an invalid state, and
4829  *  the widget as a whole will have an invalid state if any invalid tags
4830  *  are present.
4831  * @cfg {boolean} [allowReordering=true] Allow reordering of the items
4832  * @cfg {Object[]|String[]} [selected] A set of selected tags. If given,
4833  *  these will appear in the tag list on initialization, as long as they
4834  *  pass the validity tests.
4835  */
4836 OO.ui.TagMultiselectWidget = function OoUiTagMultiselectWidget( config ) {
4837         var inputEvents,
4838                 rAF = window.requestAnimationFrame || setTimeout,
4839                 widget = this,
4840                 $tabFocus = $( '<span>' )
4841                         .addClass( 'oo-ui-tagMultiselectWidget-focusTrap' );
4842
4843         config = config || {};
4844
4845         // Parent constructor
4846         OO.ui.TagMultiselectWidget.parent.call( this, config );
4847
4848         // Mixin constructors
4849         OO.ui.mixin.GroupWidget.call( this, config );
4850         OO.ui.mixin.IndicatorElement.call( this, config );
4851         OO.ui.mixin.IconElement.call( this, config );
4852         OO.ui.mixin.TabIndexedElement.call( this, config );
4853         OO.ui.mixin.FlaggedElement.call( this, config );
4854         OO.ui.mixin.DraggableGroupElement.call( this, config );
4855
4856         this.toggleDraggable(
4857                 config.allowReordering === undefined ?
4858                         true : !!config.allowReordering
4859         );
4860
4861         this.inputPosition =
4862                 this.constructor.static.allowedInputPositions.indexOf( config.inputPosition ) > -1 ?
4863                         config.inputPosition : 'inline';
4864         this.allowEditTags = config.allowEditTags === undefined ? true : !!config.allowEditTags;
4865         this.allowArbitrary = !!config.allowArbitrary;
4866         this.allowDuplicates = !!config.allowDuplicates;
4867         this.allowedValues = config.allowedValues || [];
4868         this.allowDisplayInvalidTags = config.allowDisplayInvalidTags;
4869         this.hasInput = this.inputPosition !== 'none';
4870         this.height = null;
4871         this.valid = true;
4872
4873         this.$content = $( '<div>' )
4874                 .addClass( 'oo-ui-tagMultiselectWidget-content' );
4875         this.$handle = $( '<div>' )
4876                 .addClass( 'oo-ui-tagMultiselectWidget-handle' )
4877                 .append(
4878                         this.$indicator,
4879                         this.$icon,
4880                         this.$content
4881                                 .append(
4882                                         this.$group
4883                                                 .addClass( 'oo-ui-tagMultiselectWidget-group' )
4884                                 )
4885                 );
4886
4887         // Events
4888         this.aggregate( {
4889                 remove: 'itemRemove',
4890                 navigate: 'itemNavigate',
4891                 select: 'itemSelect',
4892                 fixed: 'itemFixed'
4893         } );
4894         this.connect( this, {
4895                 itemRemove: 'onTagRemove',
4896                 itemSelect: 'onTagSelect',
4897                 itemFixed: 'onTagFixed',
4898                 itemNavigate: 'onTagNavigate',
4899                 change: 'onChangeTags'
4900         } );
4901         this.$handle.on( {
4902                 mousedown: this.onMouseDown.bind( this )
4903         } );
4904
4905         // Initialize
4906         this.$element
4907                 .addClass( 'oo-ui-tagMultiselectWidget' )
4908                 .append( this.$handle );
4909
4910         if ( this.hasInput ) {
4911                 if ( config.inputWidget ) {
4912                         this.input = config.inputWidget;
4913                 } else {
4914                         this.input = new OO.ui.TextInputWidget( $.extend( {
4915                                 placeholder: config.placeholder,
4916                                 classes: [ 'oo-ui-tagMultiselectWidget-input' ]
4917                         }, config.input ) );
4918                 }
4919                 this.input.setDisabled( this.isDisabled() );
4920
4921                 inputEvents = {
4922                         focus: this.onInputFocus.bind( this ),
4923                         blur: this.onInputBlur.bind( this ),
4924                         'propertychange change click mouseup keydown keyup input cut paste select focus':
4925                                 OO.ui.debounce( this.updateInputSize.bind( this ) ),
4926                         keydown: this.onInputKeyDown.bind( this ),
4927                         keypress: this.onInputKeyPress.bind( this )
4928                 };
4929
4930                 this.input.$input.on( inputEvents );
4931
4932                 if ( this.inputPosition === 'outline' ) {
4933                         // Override max-height for the input widget
4934                         // in the case the widget is outline so it can
4935                         // stretch all the way if the widet is wide
4936                         this.input.$element.css( 'max-width', 'inherit' );
4937                         this.$element
4938                                 .addClass( 'oo-ui-tagMultiselectWidget-outlined' )
4939                                 .append( this.input.$element );
4940                 } else {
4941                         this.$element.addClass( 'oo-ui-tagMultiselectWidget-inlined' );
4942                         // HACK: When the widget is using 'inline' input, the
4943                         // behavior needs to only use the $input itself
4944                         // so we style and size it accordingly (otherwise
4945                         // the styling and sizing can get very convoluted
4946                         // when the wrapping divs and other elements)
4947                         // We are taking advantage of still being able to
4948                         // call the widget itself for operations like
4949                         // .getValue() and setDisabled() and .focus() but
4950                         // having only the $input attached to the DOM
4951                         this.$content.append( this.input.$input );
4952                 }
4953         } else {
4954                 this.$content.append( $tabFocus );
4955         }
4956
4957         this.setTabIndexedElement(
4958                 this.hasInput ?
4959                         this.input.$input :
4960                         $tabFocus
4961         );
4962
4963         if ( config.selected ) {
4964                 this.setValue( config.selected );
4965         }
4966
4967         // HACK: Input size needs to be calculated after everything
4968         // else is rendered
4969         rAF( function () {
4970                 if ( widget.hasInput ) {
4971                         widget.updateInputSize();
4972                 }
4973         } );
4974 };
4975
4976 /* Initialization */
4977
4978 OO.inheritClass( OO.ui.TagMultiselectWidget, OO.ui.Widget );
4979 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.GroupWidget );
4980 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.DraggableGroupElement );
4981 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.IndicatorElement );
4982 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.IconElement );
4983 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.TabIndexedElement );
4984 OO.mixinClass( OO.ui.TagMultiselectWidget, OO.ui.mixin.FlaggedElement );
4985
4986 /* Static properties */
4987
4988 /**
4989  * Allowed input positions.
4990  * - inline: The input is inside the tag list
4991  * - outline: The input is under the tag list
4992  * - none: There is no input
4993  *
4994  * @property {Array}
4995  */
4996 OO.ui.TagMultiselectWidget.static.allowedInputPositions = [ 'inline', 'outline', 'none' ];
4997
4998 /* Methods */
4999
5000 /**
5001  * Handle mouse down events.
5002  *
5003  * @private
5004  * @param {jQuery.Event} e Mouse down event
5005  * @return {boolean} False to prevent defaults
5006  */
5007 OO.ui.TagMultiselectWidget.prototype.onMouseDown = function ( e ) {
5008         if (
5009                 !this.isDisabled() &&
5010                 ( !this.hasInput || e.target !== this.input.$input[ 0 ] ) &&
5011                 e.which === OO.ui.MouseButtons.LEFT
5012         ) {
5013                 this.focus();
5014                 return false;
5015         }
5016 };
5017
5018 /**
5019  * Handle key press events.
5020  *
5021  * @private
5022  * @param {jQuery.Event} e Key press event
5023  * @return {boolean} Whether to prevent defaults
5024  */
5025 OO.ui.TagMultiselectWidget.prototype.onInputKeyPress = function ( e ) {
5026         var stopOrContinue,
5027                 withMetaKey = e.metaKey || e.ctrlKey;
5028
5029         if ( !this.isDisabled() ) {
5030                 if ( e.which === OO.ui.Keys.ENTER ) {
5031                         stopOrContinue = this.doInputEnter( e, withMetaKey );
5032                 }
5033
5034                 // Make sure the input gets resized.
5035                 setTimeout( this.updateInputSize.bind( this ), 0 );
5036                 return stopOrContinue;
5037         }
5038 };
5039
5040 /**
5041  * Handle key down events.
5042  *
5043  * @private
5044  * @param {jQuery.Event} e Key down event
5045  * @return {boolean}
5046  */
5047 OO.ui.TagMultiselectWidget.prototype.onInputKeyDown = function ( e ) {
5048         var movement, direction,
5049                 widget = this,
5050                 withMetaKey = e.metaKey || e.ctrlKey,
5051                 isMovementInsideInput = function ( direction ) {
5052                         var inputRange = widget.input.getRange(),
5053                                 inputValue = widget.hasInput && widget.input.getValue();
5054
5055                         if ( direction === 'forwards' && inputRange.to > inputValue.length - 1 ) {
5056                                 return false;
5057                         }
5058
5059                         if ( direction === 'backwards' && inputRange.from <= 0 ) {
5060                                 return false;
5061                         }
5062
5063                         return true;
5064                 };
5065
5066         if ( !this.isDisabled() ) {
5067                 // 'keypress' event is not triggered for Backspace
5068                 if ( e.keyCode === OO.ui.Keys.BACKSPACE ) {
5069                         return this.doInputBackspace( e, withMetaKey );
5070                 } else if ( e.keyCode === OO.ui.Keys.ESCAPE ) {
5071                         return this.doInputEscape( e );
5072                 } else if (
5073                         e.keyCode === OO.ui.Keys.LEFT ||
5074                         e.keyCode === OO.ui.Keys.RIGHT
5075                 ) {
5076                         if ( OO.ui.Element.static.getDir( this.$element ) === 'rtl' ) {
5077                                 movement = {
5078                                         left: 'forwards',
5079                                         right: 'backwards'
5080                                 };
5081                         } else {
5082                                 movement = {
5083                                         left: 'backwards',
5084                                         right: 'forwards'
5085                                 };
5086                         }
5087                         direction = e.keyCode === OO.ui.Keys.LEFT ?
5088                                 movement.left : movement.right;
5089
5090                         if ( !this.hasInput || !isMovementInsideInput( direction ) ) {
5091                                 return this.doInputArrow( e, direction, withMetaKey );
5092                         }
5093                 }
5094         }
5095 };
5096
5097 /**
5098  * Respond to input focus event
5099  */
5100 OO.ui.TagMultiselectWidget.prototype.onInputFocus = function () {
5101         this.$element.addClass( 'oo-ui-tagMultiselectWidget-focus' );
5102 };
5103
5104 /**
5105  * Respond to input blur event
5106  */
5107 OO.ui.TagMultiselectWidget.prototype.onInputBlur = function () {
5108         this.$element.removeClass( 'oo-ui-tagMultiselectWidget-focus' );
5109 };
5110
5111 /**
5112  * Perform an action after the enter key on the input
5113  *
5114  * @param {jQuery.Event} e Event data
5115  * @param {boolean} [withMetaKey] Whether this key was pressed with
5116  * a meta key like 'ctrl'
5117  * @return {boolean} Whether to prevent defaults
5118  */
5119 OO.ui.TagMultiselectWidget.prototype.doInputEnter = function () {
5120         this.addTagFromInput();
5121         return false;
5122 };
5123
5124 /**
5125  * Perform an action responding to the enter key on the input
5126  *
5127  * @param {jQuery.Event} e Event data
5128  * @param {boolean} [withMetaKey] Whether this key was pressed with
5129  * a meta key like 'ctrl'
5130  * @return {boolean} Whether to prevent defaults
5131  */
5132 OO.ui.TagMultiselectWidget.prototype.doInputBackspace = function ( e, withMetaKey ) {
5133         var items, item;
5134
5135         if (
5136                 this.inputPosition === 'inline' &&
5137                 this.input.getValue() === '' &&
5138                 !this.isEmpty()
5139         ) {
5140                 // Delete the last item
5141                 items = this.getItems();
5142                 item = items[ items.length - 1 ];
5143
5144                 if ( !item.isDisabled() && !item.isFixed() ) {
5145                         this.removeItems( [ item ] );
5146                         // If Ctrl/Cmd was pressed, delete item entirely.
5147                         // Otherwise put it into the text field for editing.
5148                         if ( !withMetaKey ) {
5149                                 this.input.setValue( item.getData() );
5150                         }
5151                 }
5152
5153                 return false;
5154         }
5155 };
5156
5157 /**
5158  * Perform an action after the escape key on the input
5159  *
5160  * @param {jQuery.Event} e Event data
5161  */
5162 OO.ui.TagMultiselectWidget.prototype.doInputEscape = function () {
5163         this.clearInput();
5164 };
5165
5166 /**
5167  * Perform an action after the arrow key on the input, select the previous
5168  * item from the input.
5169  * See #getPreviousItem
5170  *
5171  * @param {jQuery.Event} e Event data
5172  * @param {string} direction Direction of the movement; forwards or backwards
5173  * @param {boolean} [withMetaKey] Whether this key was pressed with
5174  *  a meta key like 'ctrl'
5175  */
5176 OO.ui.TagMultiselectWidget.prototype.doInputArrow = function ( e, direction ) {
5177         if (
5178                 this.inputPosition === 'inline' &&
5179                 !this.isEmpty() &&
5180                 direction === 'backwards'
5181         ) {
5182                 // Get previous item
5183                 this.getPreviousItem().focus();
5184         }
5185 };
5186
5187 /**
5188  * Respond to item select event
5189  *
5190  * @param {OO.ui.TagItemWidget} item Selected item
5191  */
5192 OO.ui.TagMultiselectWidget.prototype.onTagSelect = function ( item ) {
5193         if ( this.hasInput && this.allowEditTags && !item.isFixed() ) {
5194                 if ( this.input.getValue() ) {
5195                         this.addTagFromInput();
5196                 }
5197                 // 1. Get the label of the tag into the input
5198                 this.input.setValue( item.getData() );
5199                 // 2. Remove the tag
5200                 this.removeItems( [ item ] );
5201                 // 3. Focus the input
5202                 this.focus();
5203         }
5204 };
5205
5206 /**
5207  * Respond to item fixed state change
5208  *
5209  * @param {OO.ui.TagItemWidget} item Selected item
5210  */
5211 OO.ui.TagMultiselectWidget.prototype.onTagFixed = function ( item ) {
5212         var i,
5213                 items = this.getItems();
5214
5215         // Move item to the end of the static items
5216         for ( i = 0; i < items.length; i++ ) {
5217                 if ( items[ i ] !== item && !items[ i ].isFixed() ) {
5218                         break;
5219                 }
5220         }
5221         this.addItems( item, i );
5222 };
5223 /**
5224  * Respond to change event, where items were added, removed, or cleared.
5225  */
5226 OO.ui.TagMultiselectWidget.prototype.onChangeTags = function () {
5227         this.toggleValid( this.checkValidity() );
5228         if ( this.hasInput ) {
5229                 this.updateInputSize();
5230         }
5231         this.updateIfHeightChanged();
5232 };
5233
5234 /**
5235  * @inheritdoc
5236  */
5237 OO.ui.TagMultiselectWidget.prototype.setDisabled = function ( isDisabled ) {
5238         // Parent method
5239         OO.ui.TagMultiselectWidget.parent.prototype.setDisabled.call( this, isDisabled );
5240
5241         if ( this.hasInput && this.input ) {
5242                 this.input.setDisabled( !!isDisabled );
5243         }
5244
5245         if ( this.items ) {
5246                 this.getItems().forEach( function ( item ) {
5247                         item.setDisabled( !!isDisabled );
5248                 } );
5249         }
5250 };
5251
5252 /**
5253  * Respond to tag remove event
5254  * @param {OO.ui.TagItemWidget} item Removed tag
5255  */
5256 OO.ui.TagMultiselectWidget.prototype.onTagRemove = function ( item ) {
5257         this.removeTagByData( item.getData() );
5258 };
5259
5260 /**
5261  * Respond to navigate event on the tag
5262  *
5263  * @param {OO.ui.TagItemWidget} item Removed tag
5264  * @param {string} direction Direction of movement; 'forwards' or 'backwards'
5265  */
5266 OO.ui.TagMultiselectWidget.prototype.onTagNavigate = function ( item, direction ) {
5267         var firstItem = this.getItems()[ 0 ];
5268
5269         if ( direction === 'forwards' ) {
5270                 this.getNextItem( item ).focus();
5271         } else if ( !this.inputPosition === 'inline' || item !== firstItem ) {
5272                 // If the widget has an inline input, we want to stop at the starting edge
5273                 // of the tags
5274                 this.getPreviousItem( item ).focus();
5275         }
5276 };
5277
5278 /**
5279  * Add tag from input value
5280  */
5281 OO.ui.TagMultiselectWidget.prototype.addTagFromInput = function () {
5282         var val = this.input.getValue(),
5283                 isValid = this.isAllowedData( val );
5284
5285         if ( !val ) {
5286                 return;
5287         }
5288
5289         if ( isValid || this.allowDisplayInvalidTags ) {
5290                 this.addTag( val );
5291                 this.clearInput();
5292                 this.focus();
5293         }
5294 };
5295
5296 /**
5297  * Clear the input
5298  */
5299 OO.ui.TagMultiselectWidget.prototype.clearInput = function () {
5300         this.input.setValue( '' );
5301 };
5302
5303 /**
5304  * Check whether the given value is a duplicate of an existing
5305  * tag already in the list.
5306  *
5307  * @param {string|Object} data Requested value
5308  * @return {boolean} Value is duplicate
5309  */
5310 OO.ui.TagMultiselectWidget.prototype.isDuplicateData = function ( data ) {
5311         return !!this.findItemFromData( data );
5312 };
5313
5314 /**
5315  * Check whether a given value is allowed to be added
5316  *
5317  * @param {string|Object} data Requested value
5318  * @return {boolean} Value is allowed
5319  */
5320 OO.ui.TagMultiselectWidget.prototype.isAllowedData = function ( data ) {
5321         if (
5322                 !this.allowDuplicates &&
5323                 this.isDuplicateData( data )
5324         ) {
5325                 return false;
5326         }
5327
5328         if ( this.allowArbitrary ) {
5329                 return true;
5330         }
5331
5332         // Check with allowed values
5333         if (
5334                 this.getAllowedValues().some( function ( value ) {
5335                         return data === value;
5336                 } )
5337         ) {
5338                 return true;
5339         }
5340
5341         return false;
5342 };
5343
5344 /**
5345  * Get the allowed values list
5346  *
5347  * @return {string[]} Allowed data values
5348  */
5349 OO.ui.TagMultiselectWidget.prototype.getAllowedValues = function () {
5350         return this.allowedValues;
5351 };
5352
5353 /**
5354  * Add a value to the allowed values list
5355  *
5356  * @param {string} value Allowed data value
5357  */
5358 OO.ui.TagMultiselectWidget.prototype.addAllowedValue = function ( value ) {
5359         if ( this.allowedValues.indexOf( value ) === -1 ) {
5360                 this.allowedValues.push( value );
5361         }
5362 };
5363
5364 /**
5365  * Get the datas of the currently selected items
5366  *
5367  * @return {string[]|Object[]} Datas of currently selected items
5368  */
5369 OO.ui.TagMultiselectWidget.prototype.getValue = function () {
5370         return this.getItems()
5371                 .filter( function ( item ) {
5372                         return item.isValid();
5373                 } )
5374                 .map( function ( item ) {
5375                         return item.getData();
5376                 } );
5377 };
5378
5379 /**
5380  * Set the value of this widget by datas.
5381  *
5382  * @param {string|string[]|Object|Object[]} valueObject An object representing the data
5383  *  and label of the value. If the widget allows arbitrary values,
5384  *  the items will be added as-is. Otherwise, the data value will
5385  *  be checked against allowedValues.
5386  *  This object must contain at least a data key. Example:
5387  *  { data: 'foo', label: 'Foo item' }
5388  *  For multiple items, use an array of objects. For example:
5389  *   [
5390  *      { data: 'foo', label: 'Foo item' },
5391  *      { data: 'bar', label: 'Bar item' }
5392  *       ]
5393  *  Value can also be added with plaintext array, for example:
5394  *  [ 'foo', 'bar', 'bla' ] or a single string, like 'foo'
5395  */
5396 OO.ui.TagMultiselectWidget.prototype.setValue = function ( valueObject ) {
5397         valueObject = Array.isArray( valueObject ) ? valueObject : [ valueObject ];
5398
5399         this.clearItems();
5400         valueObject.forEach( function ( obj ) {
5401                 if ( typeof obj === 'string' ) {
5402                         this.addTag( obj );
5403                 } else {
5404                         this.addTag( obj.data, obj.label );
5405                 }
5406         }.bind( this ) );
5407 };
5408
5409 /**
5410  * Add tag to the display area
5411  *
5412  * @param {string|Object} data Tag data
5413  * @param {string} [label] Tag label. If no label is provided, the
5414  *  stringified version of the data will be used instead.
5415  * @return {boolean} Item was added successfully
5416  */
5417 OO.ui.TagMultiselectWidget.prototype.addTag = function ( data, label ) {
5418         var newItemWidget,
5419                 isValid = this.isAllowedData( data );
5420
5421         if ( isValid || this.allowDisplayInvalidTags ) {
5422                 newItemWidget = this.createTagItemWidget( data, label );
5423                 newItemWidget.toggleValid( isValid );
5424                 this.addItems( [ newItemWidget ] );
5425                 return true;
5426         }
5427         return false;
5428 };
5429
5430 /**
5431  * Remove tag by its data property.
5432  *
5433  * @param {string|Object} data Tag data
5434  */
5435 OO.ui.TagMultiselectWidget.prototype.removeTagByData = function ( data ) {
5436         var item = this.findItemFromData( data );
5437
5438         this.removeItems( [ item ] );
5439 };
5440
5441 /**
5442  * Construct a OO.ui.TagItemWidget (or a subclass thereof) from given label and data.
5443  *
5444  * @protected
5445  * @param {string} data Item data
5446  * @param {string} label The label text.
5447  * @return {OO.ui.TagItemWidget}
5448  */
5449 OO.ui.TagMultiselectWidget.prototype.createTagItemWidget = function ( data, label ) {
5450         label = label || data;
5451
5452         return new OO.ui.TagItemWidget( { data: data, label: label } );
5453 };
5454
5455 /**
5456  * Given an item, returns the item after it. If the item is already the
5457  * last item, return `this.input`. If no item is passed, returns the
5458  * very first item.
5459  *
5460  * @protected
5461  * @param {OO.ui.TagItemWidget} [item] Tag item
5462  * @return {OO.ui.Widget} The next widget available.
5463  */
5464 OO.ui.TagMultiselectWidget.prototype.getNextItem = function ( item ) {
5465         var itemIndex = this.items.indexOf( item );
5466
5467         if ( item === undefined || itemIndex === -1 ) {
5468                 return this.items[ 0 ];
5469         }
5470
5471         if ( itemIndex === this.items.length - 1 ) { // Last item
5472                 if ( this.hasInput ) {
5473                         return this.input;
5474                 } else {
5475                         // Return first item
5476                         return this.items[ 0 ];
5477                 }
5478         } else {
5479                 return this.items[ itemIndex + 1 ];
5480         }
5481 };
5482
5483 /**
5484  * Given an item, returns the item before it. If the item is already the
5485  * first item, return `this.input`. If no item is passed, returns the
5486  * very last item.
5487  *
5488  * @protected
5489  * @param {OO.ui.TagItemWidget} [item] Tag item
5490  * @return {OO.ui.Widget} The previous widget available.
5491  */
5492 OO.ui.TagMultiselectWidget.prototype.getPreviousItem = function ( item ) {
5493         var itemIndex = this.items.indexOf( item );
5494
5495         if ( item === undefined || itemIndex === -1 ) {
5496                 return this.items[ this.items.length - 1 ];
5497         }
5498
5499         if ( itemIndex === 0 ) {
5500                 if ( this.hasInput ) {
5501                         return this.input;
5502                 } else {
5503                         // Return the last item
5504                         return this.items[ this.items.length - 1 ];
5505                 }
5506         } else {
5507                 return this.items[ itemIndex - 1 ];
5508         }
5509 };
5510
5511 /**
5512  * Update the dimensions of the text input field to encompass all available area.
5513  * This is especially relevant for when the input is at the edge of a line
5514  * and should get smaller. The usual operation (as an inline-block with min-width)
5515  * does not work in that case, pushing the input downwards to the next line.
5516  *
5517  * @private
5518  */
5519 OO.ui.TagMultiselectWidget.prototype.updateInputSize = function () {
5520         var $lastItem, direction, contentWidth, currentWidth, bestWidth;
5521         if ( this.inputPosition === 'inline' && !this.isDisabled() ) {
5522                 if ( this.input.$input[ 0 ].scrollWidth === 0 ) {
5523                         // Input appears to be attached but not visible.
5524                         // Don't attempt to adjust its size, because our measurements
5525                         // are going to fail anyway.
5526                         return;
5527                 }
5528                 this.input.$input.css( 'width', '1em' );
5529                 $lastItem = this.$group.children().last();
5530                 direction = OO.ui.Element.static.getDir( this.$handle );
5531
5532                 // Get the width of the input with the placeholder text as
5533                 // the value and save it so that we don't keep recalculating
5534                 if (
5535                         this.contentWidthWithPlaceholder === undefined &&
5536                         this.input.getValue() === '' &&
5537                         this.input.$input.attr( 'placeholder' ) !== undefined
5538                 ) {
5539                         this.input.setValue( this.input.$input.attr( 'placeholder' ) );
5540                         this.contentWidthWithPlaceholder = this.input.$input[ 0 ].scrollWidth;
5541                         this.input.setValue( '' );
5542
5543                 }
5544
5545                 // Always keep the input wide enough for the placeholder text
5546                 contentWidth = Math.max(
5547                         this.input.$input[ 0 ].scrollWidth,
5548                         // undefined arguments in Math.max lead to NaN
5549                         ( this.contentWidthWithPlaceholder === undefined ) ?
5550                                 0 : this.contentWidthWithPlaceholder
5551                 );
5552                 currentWidth = this.input.$input.width();
5553
5554                 if ( contentWidth < currentWidth ) {
5555                         this.updateIfHeightChanged();
5556                         // All is fine, don't perform expensive calculations
5557                         return;
5558                 }
5559
5560                 if ( $lastItem.length === 0 ) {
5561                         bestWidth = this.$content.innerWidth();
5562                 } else {
5563                         bestWidth = direction === 'ltr' ?
5564                                 this.$content.innerWidth() - $lastItem.position().left - $lastItem.outerWidth() :
5565                                 $lastItem.position().left;
5566                 }
5567
5568                 // Some safety margin for sanity, because I *really* don't feel like finding out where the few
5569                 // pixels this is off by are coming from.
5570                 bestWidth -= 10;
5571                 if ( contentWidth > bestWidth ) {
5572                         // This will result in the input getting shifted to the next line
5573                         bestWidth = this.$content.innerWidth() - 10;
5574                 }
5575                 this.input.$input.width( Math.floor( bestWidth ) );
5576                 this.updateIfHeightChanged();
5577         } else {
5578                 this.updateIfHeightChanged();
5579         }
5580 };
5581
5582 /**
5583  * Determine if widget height changed, and if so,
5584  * emit the resize event. This is useful for when there are either
5585  * menus or popups attached to the bottom of the widget, to allow
5586  * them to change their positioning in case the widget moved down
5587  * or up.
5588  *
5589  * @private
5590  */
5591 OO.ui.TagMultiselectWidget.prototype.updateIfHeightChanged = function () {
5592         var height = this.$element.height();
5593         if ( height !== this.height ) {
5594                 this.height = height;
5595                 this.emit( 'resize' );
5596         }
5597 };
5598
5599 /**
5600  * Check whether all items in the widget are valid
5601  *
5602  * @return {boolean} Widget is valid
5603  */
5604 OO.ui.TagMultiselectWidget.prototype.checkValidity = function () {
5605         return this.getItems().every( function ( item ) {
5606                 return item.isValid();
5607         } );
5608 };
5609
5610 /**
5611  * Set the valid state of this item
5612  *
5613  * @param {boolean} [valid] Item is valid
5614  * @fires valid
5615  */
5616 OO.ui.TagMultiselectWidget.prototype.toggleValid = function ( valid ) {
5617         valid = valid === undefined ? !this.valid : !!valid;
5618
5619         if ( this.valid !== valid ) {
5620                 this.valid = valid;
5621
5622                 this.setFlags( { invalid: !this.valid } );
5623
5624                 this.emit( 'valid', this.valid );
5625         }
5626 };
5627
5628 /**
5629  * Get the current valid state of the widget
5630  *
5631  * @return {boolean} Widget is valid
5632  */
5633 OO.ui.TagMultiselectWidget.prototype.isValid = function () {
5634         return this.valid;
5635 };
5636
5637 /**
5638  * PopupTagMultiselectWidget is a {@link OO.ui.TagMultiselectWidget OO.ui.TagMultiselectWidget} intended
5639  * to use a popup. The popup can be configured to have a default input to insert values into the widget.
5640  *
5641  *     @example
5642  *     // Example: A basic PopupTagMultiselectWidget.
5643  *     var widget = new OO.ui.PopupTagMultiselectWidget();
5644  *     $( 'body' ).append( widget.$element );
5645  *
5646  *     // Example: A PopupTagMultiselectWidget with an external popup.
5647  *     var popupInput = new OO.ui.TextInputWidget(),
5648  *         widget = new OO.ui.PopupTagMultiselectWidget( {
5649  *            popupInput: popupInput,
5650  *            popup: {
5651  *               $content: popupInput.$element
5652  *            }
5653  *         } );
5654  *     $( 'body' ).append( widget.$element );
5655  *
5656  * @class
5657  * @extends OO.ui.TagMultiselectWidget
5658  * @mixins OO.ui.mixin.PopupElement
5659  *
5660  * @param {Object} config Configuration object
5661  * @cfg {jQuery} [$overlay] An overlay for the popup.
5662  *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
5663  * @cfg {Object} [popup] Configuration options for the popup
5664  * @cfg {OO.ui.InputWidget} [popupInput] An input widget inside the popup that will be
5665  *  focused when the popup is opened and will be used as replacement for the
5666  *  general input in the widget.
5667  */
5668 OO.ui.PopupTagMultiselectWidget = function OoUiPopupTagMultiselectWidget( config ) {
5669         var defaultInput,
5670                 defaultConfig = { popup: {} };
5671
5672         config = config || {};
5673
5674         // Parent constructor
5675         OO.ui.PopupTagMultiselectWidget.parent.call( this, $.extend( { inputPosition: 'none' }, config ) );
5676
5677         this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;
5678
5679         if ( !config.popup ) {
5680                 // For the default base implementation, we give a popup
5681                 // with an input widget inside it. For any other use cases
5682                 // the popup needs to be populated externally and the
5683                 // event handled to add tags separately and manually
5684                 defaultInput = new OO.ui.TextInputWidget();
5685
5686                 defaultConfig.popupInput = defaultInput;
5687                 defaultConfig.popup.$content = defaultInput.$element;
5688                 defaultConfig.popup.padded = true;
5689
5690                 this.$element.addClass( 'oo-ui-popupTagMultiselectWidget-defaultPopup' );
5691         }
5692
5693         // Add overlay, and add that to the autoCloseIgnore
5694         defaultConfig.popup.$overlay = this.$overlay;
5695         defaultConfig.popup.$autoCloseIgnore = this.hasInput ?
5696                 this.input.$element.add( this.$overlay ) : this.$overlay;
5697
5698         // Allow extending any of the above
5699         config = $.extend( defaultConfig, config );
5700
5701         // Mixin constructors
5702         OO.ui.mixin.PopupElement.call( this, config );
5703
5704         if ( this.hasInput ) {
5705                 this.input.$input.on( 'focus', this.popup.toggle.bind( this.popup, true ) );
5706         }
5707
5708         // Configuration options
5709         this.popupInput = config.popupInput;
5710         if ( this.popupInput ) {
5711                 this.popupInput.connect( this, {
5712                         enter: 'onPopupInputEnter'
5713                 } );
5714         }
5715
5716         // Events
5717         this.on( 'resize', this.popup.updateDimensions.bind( this.popup ) );
5718         this.popup.connect( this, { toggle: 'onPopupToggle' } );
5719         this.$tabIndexed
5720                 .on( 'focus', this.onFocus.bind( this ) );
5721
5722         // Initialize
5723         this.$element
5724                 .append( this.popup.$element )
5725                 .addClass( 'oo-ui-popupTagMultiselectWidget' );
5726 };
5727
5728 /* Initialization */
5729
5730 OO.inheritClass( OO.ui.PopupTagMultiselectWidget, OO.ui.TagMultiselectWidget );
5731 OO.mixinClass( OO.ui.PopupTagMultiselectWidget, OO.ui.mixin.PopupElement );
5732
5733 /* Methods */
5734
5735 /**
5736  * Focus event handler.
5737  *
5738  * @private
5739  */
5740 OO.ui.PopupTagMultiselectWidget.prototype.onFocus = function () {
5741         this.popup.toggle( true );
5742 };
5743
5744 /**
5745  * Respond to popup toggle event
5746  *
5747  * @param {boolean} isVisible Popup is visible
5748  */
5749 OO.ui.PopupTagMultiselectWidget.prototype.onPopupToggle = function ( isVisible ) {
5750         if ( isVisible && this.popupInput ) {
5751                 this.popupInput.focus();
5752         }
5753 };
5754
5755 /**
5756  * Respond to popup input enter event
5757  */
5758 OO.ui.PopupTagMultiselectWidget.prototype.onPopupInputEnter = function () {
5759         if ( this.popupInput ) {
5760                 this.addTagByPopupValue( this.popupInput.getValue() );
5761                 this.popupInput.setValue( '' );
5762         }
5763 };
5764
5765 /**
5766  * @inheritdoc
5767  */
5768 OO.ui.PopupTagMultiselectWidget.prototype.onTagSelect = function ( item ) {
5769         if ( this.popupInput && this.allowEditTags ) {
5770                 this.popupInput.setValue( item.getData() );
5771                 this.removeItems( [ item ] );
5772
5773                 this.popup.toggle( true );
5774                 this.popupInput.focus();
5775         } else {
5776                 // Parent
5777                 OO.ui.PopupTagMultiselectWidget.parent.prototype.onTagSelect.call( this, item );
5778         }
5779 };
5780
5781 /**
5782  * Add a tag by the popup value.
5783  * Whatever is responsible for setting the value in the popup should call
5784  * this method to add a tag, or use the regular methods like #addTag or
5785  * #setValue directly.
5786  *
5787  * @param {string} data The value of item
5788  * @param {string} [label] The label of the tag. If not given, the data is used.
5789  */
5790 OO.ui.PopupTagMultiselectWidget.prototype.addTagByPopupValue = function ( data, label ) {
5791         this.addTag( data, label );
5792 };
5793
5794 /**
5795  * MenuTagMultiselectWidget is a {@link OO.ui.TagMultiselectWidget OO.ui.TagMultiselectWidget} intended
5796  * to use a menu of selectable options.
5797  *
5798  *     @example
5799  *     // Example: A basic MenuTagMultiselectWidget.
5800  *     var widget = new OO.ui.MenuTagMultiselectWidget( {
5801  *         inputPosition: 'outline',
5802  *         options: [
5803  *            { data: 'option1', label: 'Option 1', icon: 'tag' },
5804  *            { data: 'option2', label: 'Option 2' },
5805  *            { data: 'option3', label: 'Option 3' },
5806  *         ],
5807  *         selected: [ 'option1', 'option2' ]
5808  *     } );
5809  *     $( 'body' ).append( widget.$element );
5810  *
5811  * @class
5812  * @extends OO.ui.TagMultiselectWidget
5813  *
5814  * @constructor
5815  * @param {Object} [config] Configuration object
5816  * @cfg {boolean} [clearInputOnChoose=true] Clear the text input value when a menu option is chosen
5817  * @cfg {Object} [menu] Configuration object for the menu widget
5818  * @cfg {jQuery} [$overlay] An overlay for the menu.
5819  *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
5820  * @cfg {Object[]} [options=[]] Array of menu options in the format `{ data: …, label: … }`
5821  */
5822 OO.ui.MenuTagMultiselectWidget = function OoUiMenuTagMultiselectWidget( config ) {
5823         config = config || {};
5824
5825         // Parent constructor
5826         OO.ui.MenuTagMultiselectWidget.parent.call( this, config );
5827
5828         this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;
5829         this.clearInputOnChoose = config.clearInputOnChoose === undefined || !!config.clearInputOnChoose;
5830         this.menu = this.createMenuWidget( $.extend( {
5831                 widget: this,
5832                 input: this.hasInput ? this.input : null,
5833                 $input: this.hasInput ? this.input.$input : null,
5834                 filterFromInput: !!this.hasInput,
5835                 $autoCloseIgnore: this.hasInput ?
5836                         this.input.$element : $( [] ),
5837                 $floatableContainer: this.hasInput && this.inputPosition === 'outline' ?
5838                         this.input.$element : this.$element,
5839                 $overlay: this.$overlay,
5840                 disabled: this.isDisabled()
5841         }, config.menu ) );
5842         this.addOptions( config.options || [] );
5843
5844         // Events
5845         this.menu.connect( this, {
5846                 choose: 'onMenuChoose',
5847                 toggle: 'onMenuToggle'
5848         } );
5849         if ( this.hasInput ) {
5850                 this.input.connect( this, { change: 'onInputChange' } );
5851         }
5852         this.connect( this, { resize: 'onResize' } );
5853
5854         // Initialization
5855         this.$overlay
5856                 .append( this.menu.$element );
5857         this.$element
5858                 .addClass( 'oo-ui-menuTagMultiselectWidget' );
5859         // TagMultiselectWidget already does this, but it doesn't work right because this.menu is not yet
5860         // set up while the parent constructor runs, and #getAllowedValues rejects everything.
5861         if ( config.selected ) {
5862                 this.setValue( config.selected );
5863         }
5864 };
5865
5866 /* Initialization */
5867
5868 OO.inheritClass( OO.ui.MenuTagMultiselectWidget, OO.ui.TagMultiselectWidget );
5869
5870 /* Methods */
5871
5872 /**
5873  * Respond to resize event
5874  */
5875 OO.ui.MenuTagMultiselectWidget.prototype.onResize = function () {
5876         // Reposition the menu
5877         this.menu.position();
5878 };
5879
5880 /**
5881  * @inheritdoc
5882  */
5883 OO.ui.MenuTagMultiselectWidget.prototype.onInputFocus = function () {
5884         // Parent method
5885         OO.ui.MenuTagMultiselectWidget.parent.prototype.onInputFocus.call( this );
5886
5887         this.menu.toggle( true );
5888 };
5889
5890 /**
5891  * Respond to input change event
5892  */
5893 OO.ui.MenuTagMultiselectWidget.prototype.onInputChange = function () {
5894         this.menu.toggle( true );
5895         this.initializeMenuSelection();
5896 };
5897
5898 /**
5899  * Respond to menu choose event
5900  *
5901  * @param {OO.ui.OptionWidget} menuItem Chosen menu item
5902  */
5903 OO.ui.MenuTagMultiselectWidget.prototype.onMenuChoose = function ( menuItem ) {
5904         // Add tag
5905         this.addTag( menuItem.getData(), menuItem.getLabel() );
5906         if ( this.hasInput && this.clearInputOnChoose ) {
5907                 this.input.setValue( '' );
5908         }
5909 };
5910
5911 /**
5912  * Respond to menu toggle event. Reset item highlights on hide.
5913  *
5914  * @param {boolean} isVisible The menu is visible
5915  */
5916 OO.ui.MenuTagMultiselectWidget.prototype.onMenuToggle = function ( isVisible ) {
5917         if ( !isVisible ) {
5918                 this.menu.selectItem( null );
5919                 this.menu.highlightItem( null );
5920         } else {
5921                 this.initializeMenuSelection();
5922         }
5923 };
5924
5925 /**
5926  * @inheritdoc
5927  */
5928 OO.ui.MenuTagMultiselectWidget.prototype.onTagSelect = function ( tagItem ) {
5929         var menuItem = this.menu.findItemFromData( tagItem.getData() );
5930         if ( !this.allowArbitrary ) {
5931                 // Override the base behavior from TagMultiselectWidget; the base behavior
5932                 // in TagMultiselectWidget is to remove the tag to edit it in the input,
5933                 // but in our case, we want to utilize the menu selection behavior, and
5934                 // definitely not remove the item.
5935
5936                 // If there is an input that is used for filtering, erase the value so we don't filter
5937                 if ( this.hasInput && this.menu.filterFromInput ) {
5938                         this.input.setValue( '' );
5939                 }
5940
5941                 // Select the menu item
5942                 this.menu.selectItem( menuItem );
5943
5944                 this.focus();
5945         } else {
5946                 // Use the default
5947                 OO.ui.MenuTagMultiselectWidget.parent.prototype.onTagSelect.call( this, tagItem );
5948         }
5949 };
5950
5951 /**
5952  * @inheritdoc
5953  */
5954 OO.ui.MenuTagMultiselectWidget.prototype.setDisabled = function ( isDisabled ) {
5955         // Parent method
5956         OO.ui.MenuTagMultiselectWidget.parent.prototype.setDisabled.call( this, isDisabled );
5957
5958         if ( this.menu ) {
5959                 // Protect against calling setDisabled() before the menu was initialized
5960                 this.menu.setDisabled( isDisabled );
5961         }
5962 };
5963
5964 /**
5965  * Highlight the first selectable item in the menu, if configured.
5966  *
5967  * @private
5968  * @chainable
5969  */
5970 OO.ui.MenuTagMultiselectWidget.prototype.initializeMenuSelection = function () {
5971         if ( !this.menu.findSelectedItem() ) {
5972                 this.menu.highlightItem( this.menu.findFirstSelectableItem() );
5973         }
5974 };
5975
5976 /**
5977  * @inheritdoc
5978  */
5979 OO.ui.MenuTagMultiselectWidget.prototype.addTagFromInput = function () {
5980         var inputValue = this.input.getValue(),
5981                 validated = false,
5982                 highlightedItem = this.menu.findHighlightedItem(),
5983                 item = this.menu.findItemFromData( inputValue );
5984
5985         if ( !inputValue ) {
5986                 return;
5987         }
5988
5989         // Override the parent method so we add from the menu
5990         // rather than directly from the input
5991
5992         // Look for a highlighted item first
5993         if ( highlightedItem ) {
5994                 validated = this.addTag( highlightedItem.getData(), highlightedItem.getLabel() );
5995         } else if ( item ) {
5996                 // Look for the element that fits the data
5997                 validated = this.addTag( item.getData(), item.getLabel() );
5998         } else {
5999                 // Otherwise, add the tag - the method will only add if the
6000                 // tag is valid or if invalid tags are allowed
6001                 validated = this.addTag( inputValue );
6002         }
6003
6004         if ( validated ) {
6005                 this.clearInput();
6006                 this.focus();
6007         }
6008 };
6009
6010 /**
6011  * Return the visible items in the menu. This is mainly used for when
6012  * the menu is filtering results.
6013  *
6014  * @return {OO.ui.MenuOptionWidget[]} Visible results
6015  */
6016 OO.ui.MenuTagMultiselectWidget.prototype.getMenuVisibleItems = function () {
6017         return this.menu.getItems().filter( function ( menuItem ) {
6018                 return menuItem.isVisible();
6019         } );
6020 };
6021
6022 /**
6023  * Create the menu for this widget. This is in a separate method so that
6024  * child classes can override this without polluting the constructor with
6025  * unnecessary extra objects that will be overidden.
6026  *
6027  * @param {Object} menuConfig Configuration options
6028  * @return {OO.ui.MenuSelectWidget} Menu widget
6029  */
6030 OO.ui.MenuTagMultiselectWidget.prototype.createMenuWidget = function ( menuConfig ) {
6031         return new OO.ui.MenuSelectWidget( menuConfig );
6032 };
6033
6034 /**
6035  * Add options to the menu
6036  *
6037  * @param {Object[]} menuOptions Object defining options
6038  */
6039 OO.ui.MenuTagMultiselectWidget.prototype.addOptions = function ( menuOptions ) {
6040         var widget = this,
6041                 items = menuOptions.map( function ( obj ) {
6042                         return widget.createMenuOptionWidget( obj.data, obj.label, obj.icon );
6043                 } );
6044
6045         this.menu.addItems( items );
6046 };
6047
6048 /**
6049  * Create a menu option widget.
6050  *
6051  * @param {string} data Item data
6052  * @param {string} [label] Item label
6053  * @param {string} [icon] Symbolic icon name
6054  * @return {OO.ui.OptionWidget} Option widget
6055  */
6056 OO.ui.MenuTagMultiselectWidget.prototype.createMenuOptionWidget = function ( data, label, icon ) {
6057         return new OO.ui.MenuOptionWidget( {
6058                 data: data,
6059                 label: label || data,
6060                 icon: icon
6061         } );
6062 };
6063
6064 /**
6065  * Get the menu
6066  *
6067  * @return {OO.ui.MenuSelectWidget} Menu
6068  */
6069 OO.ui.MenuTagMultiselectWidget.prototype.getMenu = function () {
6070         return this.menu;
6071 };
6072
6073 /**
6074  * Get the allowed values list
6075  *
6076  * @return {string[]} Allowed data values
6077  */
6078 OO.ui.MenuTagMultiselectWidget.prototype.getAllowedValues = function () {
6079         var menuDatas = [];
6080         if ( this.menu ) {
6081                 // If the parent constructor is calling us, we're not ready yet, this.menu is not set up.
6082                 menuDatas = this.menu.getItems().map( function ( menuItem ) {
6083                         return menuItem.getData();
6084                 } );
6085         }
6086         return this.allowedValues.concat( menuDatas );
6087 };
6088
6089 /**
6090  * SelectFileWidgets allow for selecting files, using the HTML5 File API. These
6091  * widgets can be configured with {@link OO.ui.mixin.IconElement icons} and {@link
6092  * OO.ui.mixin.IndicatorElement indicators}.
6093  * Please see the [OOUI documentation on MediaWiki] [1] for more information and examples.
6094  *
6095  *     @example
6096  *     // Example of a file select widget
6097  *     var selectFile = new OO.ui.SelectFileWidget();
6098  *     $( 'body' ).append( selectFile.$element );
6099  *
6100  * [1]: https://www.mediawiki.org/wiki/OOUI/Widgets
6101  *
6102  * @class
6103  * @extends OO.ui.Widget
6104  * @mixins OO.ui.mixin.IconElement
6105  * @mixins OO.ui.mixin.IndicatorElement
6106  * @mixins OO.ui.mixin.PendingElement
6107  * @mixins OO.ui.mixin.LabelElement
6108  *
6109  * @constructor
6110  * @param {Object} [config] Configuration options
6111  * @cfg {string[]|null} [accept=null] MIME types to accept. null accepts all types.
6112  * @cfg {string} [placeholder] Text to display when no file is selected.
6113  * @cfg {string} [notsupported] Text to display when file support is missing in the browser.
6114  * @cfg {boolean} [droppable=true] Whether to accept files by drag and drop.
6115  * @cfg {boolean} [showDropTarget=false] Whether to show a drop target. Requires droppable to be true.
6116  * @cfg {number} [thumbnailSizeLimit=20] File size limit in MiB above which to not try and show a
6117  *  preview (for performance)
6118  */
6119 OO.ui.SelectFileWidget = function OoUiSelectFileWidget( config ) {
6120         var dragHandler;
6121
6122         // Configuration initialization
6123         config = $.extend( {
6124                 accept: null,
6125                 placeholder: OO.ui.msg( 'ooui-selectfile-placeholder' ),
6126                 notsupported: OO.ui.msg( 'ooui-selectfile-not-supported' ),
6127                 droppable: true,
6128                 showDropTarget: false,
6129                 thumbnailSizeLimit: 20
6130         }, config );
6131
6132         // Parent constructor
6133         OO.ui.SelectFileWidget.parent.call( this, config );
6134
6135         // Mixin constructors
6136         OO.ui.mixin.IconElement.call( this, config );
6137         OO.ui.mixin.IndicatorElement.call( this, config );
6138         OO.ui.mixin.PendingElement.call( this, $.extend( {}, config, { $pending: this.$info } ) );
6139         OO.ui.mixin.LabelElement.call( this, config );
6140
6141         // Properties
6142         this.$info = $( '<span>' );
6143         this.showDropTarget = config.showDropTarget;
6144         this.thumbnailSizeLimit = config.thumbnailSizeLimit;
6145         this.isSupported = this.constructor.static.isSupported();
6146         this.currentFile = null;
6147         if ( Array.isArray( config.accept ) ) {
6148                 this.accept = config.accept;
6149         } else {
6150                 this.accept = null;
6151         }
6152         this.placeholder = config.placeholder;
6153         this.notsupported = config.notsupported;
6154         this.onFileSelectedHandler = this.onFileSelected.bind( this );
6155
6156         this.selectButton = new OO.ui.ButtonWidget( {
6157                 $element: $( '<label>' ),
6158                 classes: [ 'oo-ui-selectFileWidget-selectButton' ],
6159                 label: OO.ui.msg( 'ooui-selectfile-button-select' ),
6160                 disabled: this.disabled || !this.isSupported
6161         } );
6162
6163         this.clearButton = new OO.ui.ButtonWidget( {
6164                 classes: [ 'oo-ui-selectFileWidget-clearButton' ],
6165                 framed: false,
6166                 icon: 'close',
6167                 disabled: this.disabled
6168         } );
6169
6170         // Events
6171         this.selectButton.$button.on( {
6172                 keypress: this.onKeyPress.bind( this )
6173         } );
6174         this.clearButton.connect( this, {
6175                 click: 'onClearClick'
6176         } );
6177         if ( config.droppable ) {
6178                 dragHandler = this.onDragEnterOrOver.bind( this );
6179                 this.$element.on( {
6180                         dragenter: dragHandler,
6181                         dragover: dragHandler,
6182                         dragleave: this.onDragLeave.bind( this ),
6183                         drop: this.onDrop.bind( this )
6184                 } );
6185         }
6186
6187         // Initialization
6188         this.addInput();
6189         this.$label.addClass( 'oo-ui-selectFileWidget-label' );
6190         this.$info
6191                 .addClass( 'oo-ui-selectFileWidget-info' )
6192                 .append( this.$icon, this.$label, this.clearButton.$element, this.$indicator );
6193
6194         if ( config.droppable && config.showDropTarget ) {
6195                 this.selectButton.setIcon( 'upload' );
6196                 this.$thumbnail = $( '<div>' ).addClass( 'oo-ui-selectFileWidget-thumbnail' );
6197                 this.setPendingElement( this.$thumbnail );
6198                 this.$element
6199                         .addClass( 'oo-ui-selectFileWidget-dropTarget oo-ui-selectFileWidget' )
6200                         .on( {
6201                                 click: this.onDropTargetClick.bind( this )
6202                         } )
6203                         .append(
6204                                 this.$thumbnail,
6205                                 this.$info,
6206                                 this.selectButton.$element,
6207                                 $( '<span>' )
6208                                         .addClass( 'oo-ui-selectFileWidget-dropLabel' )
6209                                         .text( OO.ui.msg( 'ooui-selectfile-dragdrop-placeholder' ) )
6210                         );
6211         } else {
6212                 this.$element
6213                         .addClass( 'oo-ui-selectFileWidget' )
6214                         .append( this.$info, this.selectButton.$element );
6215         }
6216         this.updateUI();
6217 };
6218
6219 /* Setup */
6220
6221 OO.inheritClass( OO.ui.SelectFileWidget, OO.ui.Widget );
6222 OO.mixinClass( OO.ui.SelectFileWidget, OO.ui.mixin.IconElement );
6223 OO.mixinClass( OO.ui.SelectFileWidget, OO.ui.mixin.IndicatorElement );
6224 OO.mixinClass( OO.ui.SelectFileWidget, OO.ui.mixin.PendingElement );
6225 OO.mixinClass( OO.ui.SelectFileWidget, OO.ui.mixin.LabelElement );
6226
6227 /* Static Properties */
6228
6229 /**
6230  * Check if this widget is supported
6231  *
6232  * @static
6233  * @return {boolean}
6234  */
6235 OO.ui.SelectFileWidget.static.isSupported = function () {
6236         var $input;
6237         if ( OO.ui.SelectFileWidget.static.isSupportedCache === null ) {
6238                 $input = $( '<input>' ).attr( 'type', 'file' );
6239                 OO.ui.SelectFileWidget.static.isSupportedCache = $input[ 0 ].files !== undefined;
6240         }
6241         return OO.ui.SelectFileWidget.static.isSupportedCache;
6242 };
6243
6244 OO.ui.SelectFileWidget.static.isSupportedCache = null;
6245
6246 /* Events */
6247
6248 /**
6249  * @event change
6250  *
6251  * A change event is emitted when the on/off state of the toggle changes.
6252  *
6253  * @param {File|null} value New value
6254  */
6255
6256 /* Methods */
6257
6258 /**
6259  * Get the current value of the field
6260  *
6261  * @return {File|null}
6262  */
6263 OO.ui.SelectFileWidget.prototype.getValue = function () {
6264         return this.currentFile;
6265 };
6266
6267 /**
6268  * Set the current value of the field
6269  *
6270  * @param {File|null} file File to select
6271  */
6272 OO.ui.SelectFileWidget.prototype.setValue = function ( file ) {
6273         if ( this.currentFile !== file ) {
6274                 this.currentFile = file;
6275                 this.updateUI();
6276                 this.emit( 'change', this.currentFile );
6277         }
6278 };
6279
6280 /**
6281  * Focus the widget.
6282  *
6283  * Focusses the select file button.
6284  *
6285  * @chainable
6286  */
6287 OO.ui.SelectFileWidget.prototype.focus = function () {
6288         this.selectButton.focus();
6289         return this;
6290 };
6291
6292 /**
6293  * Blur the widget.
6294  *
6295  * @chainable
6296  */
6297 OO.ui.SelectFileWidget.prototype.blur = function () {
6298         this.selectButton.blur();
6299         return this;
6300 };
6301
6302 /**
6303  * @inheritdoc
6304  */
6305 OO.ui.SelectFileWidget.prototype.simulateLabelClick = function () {
6306         this.focus();
6307 };
6308
6309 /**
6310  * Update the user interface when a file is selected or unselected
6311  *
6312  * @protected
6313  */
6314 OO.ui.SelectFileWidget.prototype.updateUI = function () {
6315         var $label;
6316         if ( !this.isSupported ) {
6317                 this.$element.addClass( 'oo-ui-selectFileWidget-notsupported' );
6318                 this.$element.removeClass( 'oo-ui-selectFileWidget-empty' );
6319                 this.setLabel( this.notsupported );
6320         } else {
6321                 this.$element.addClass( 'oo-ui-selectFileWidget-supported' );
6322                 if ( this.currentFile ) {
6323                         this.$element.removeClass( 'oo-ui-selectFileWidget-empty' );
6324                         $label = $( [] );
6325                         $label = $label.add(
6326                                 $( '<span>' )
6327                                         .addClass( 'oo-ui-selectFileWidget-fileName' )
6328                                         .text( this.currentFile.name )
6329                         );
6330                         this.setLabel( $label );
6331
6332                         if ( this.showDropTarget ) {
6333                                 this.pushPending();
6334                                 this.loadAndGetImageUrl().done( function ( url ) {
6335                                         this.$thumbnail.css( 'background-image', 'url( ' + url + ' )' );
6336                                 }.bind( this ) ).fail( function () {
6337                                         this.$thumbnail.append(
6338                                                 new OO.ui.IconWidget( {
6339                                                         icon: 'attachment',
6340                                                         classes: [ 'oo-ui-selectFileWidget-noThumbnail-icon' ]
6341                                                 } ).$element
6342                                         );
6343                                 }.bind( this ) ).always( function () {
6344                                         this.popPending();
6345                                 }.bind( this ) );
6346                                 this.$element.off( 'click' );
6347                         }
6348                 } else {
6349                         if ( this.showDropTarget ) {
6350                                 this.$element.off( 'click' );
6351                                 this.$element.on( {
6352                                         click: this.onDropTargetClick.bind( this )
6353                                 } );
6354                                 this.$thumbnail
6355                                         .empty()
6356                                         .css( 'background-image', '' );
6357                         }
6358                         this.$element.addClass( 'oo-ui-selectFileWidget-empty' );
6359                         this.setLabel( this.placeholder );
6360                 }
6361         }
6362 };
6363
6364 /**
6365  * If the selected file is an image, get its URL and load it.
6366  *
6367  * @return {jQuery.Promise} Promise resolves with the image URL after it has loaded
6368  */
6369 OO.ui.SelectFileWidget.prototype.loadAndGetImageUrl = function () {
6370         var deferred = $.Deferred(),
6371                 file = this.currentFile,
6372                 reader = new FileReader();
6373
6374         if (
6375                 file &&
6376                 ( OO.getProp( file, 'type' ) || '' ).indexOf( 'image/' ) === 0 &&
6377                 file.size < this.thumbnailSizeLimit * 1024 * 1024
6378         ) {
6379                 reader.onload = function ( event ) {
6380                         var img = document.createElement( 'img' );
6381                         img.addEventListener( 'load', function () {
6382                                 if (
6383                                         img.naturalWidth === 0 ||
6384                                         img.naturalHeight === 0 ||
6385                                         img.complete === false
6386                                 ) {
6387                                         deferred.reject();
6388                                 } else {
6389                                         deferred.resolve( event.target.result );
6390                                 }
6391                         } );
6392                         img.src = event.target.result;
6393                 };
6394                 reader.readAsDataURL( file );
6395         } else {
6396                 deferred.reject();
6397         }
6398
6399         return deferred.promise();
6400 };
6401
6402 /**
6403  * Add the input to the widget
6404  *
6405  * @private
6406  */
6407 OO.ui.SelectFileWidget.prototype.addInput = function () {
6408         if ( this.$input ) {
6409                 this.$input.remove();
6410         }
6411
6412         if ( !this.isSupported ) {
6413                 this.$input = null;
6414                 return;
6415         }
6416
6417         this.$input = $( '<input>' ).attr( 'type', 'file' );
6418         this.$input.on( 'change', this.onFileSelectedHandler );
6419         this.$input.on( 'click', function ( e ) {
6420                 // Prevents dropTarget to get clicked which calls
6421                 // a click on this input
6422                 e.stopPropagation();
6423         } );
6424         this.$input.attr( {
6425                 tabindex: -1
6426         } );
6427         if ( this.accept ) {
6428                 this.$input.attr( 'accept', this.accept.join( ', ' ) );
6429         }
6430         this.selectButton.$button.append( this.$input );
6431 };
6432
6433 /**
6434  * Determine if we should accept this file
6435  *
6436  * @private
6437  * @param {string} mimeType File MIME type
6438  * @return {boolean}
6439  */
6440 OO.ui.SelectFileWidget.prototype.isAllowedType = function ( mimeType ) {
6441         var i, mimeTest;
6442
6443         if ( !this.accept || !mimeType ) {
6444                 return true;
6445         }
6446
6447         for ( i = 0; i < this.accept.length; i++ ) {
6448                 mimeTest = this.accept[ i ];
6449                 if ( mimeTest === mimeType ) {
6450                         return true;
6451                 } else if ( mimeTest.substr( -2 ) === '/*' ) {
6452                         mimeTest = mimeTest.substr( 0, mimeTest.length - 1 );
6453                         if ( mimeType.substr( 0, mimeTest.length ) === mimeTest ) {
6454                                 return true;
6455                         }
6456                 }
6457         }
6458
6459         return false;
6460 };
6461
6462 /**
6463  * Handle file selection from the input
6464  *
6465  * @private
6466  * @param {jQuery.Event} e
6467  */
6468 OO.ui.SelectFileWidget.prototype.onFileSelected = function ( e ) {
6469         var file = OO.getProp( e.target, 'files', 0 ) || null;
6470
6471         if ( file && !this.isAllowedType( file.type ) ) {
6472                 file = null;
6473         }
6474
6475         this.setValue( file );
6476         this.addInput();
6477 };
6478
6479 /**
6480  * Handle clear button click events.
6481  *
6482  * @private
6483  */
6484 OO.ui.SelectFileWidget.prototype.onClearClick = function () {
6485         this.setValue( null );
6486         return false;
6487 };
6488
6489 /**
6490  * Handle key press events.
6491  *
6492  * @private
6493  * @param {jQuery.Event} e Key press event
6494  */
6495 OO.ui.SelectFileWidget.prototype.onKeyPress = function ( e ) {
6496         if ( this.isSupported && !this.isDisabled() && this.$input &&
6497                 ( e.which === OO.ui.Keys.SPACE || e.which === OO.ui.Keys.ENTER )
6498         ) {
6499                 this.$input.click();
6500                 return false;
6501         }
6502 };
6503
6504 /**
6505  * Handle drop target click events.
6506  *
6507  * @private
6508  * @param {jQuery.Event} e Key press event
6509  */
6510 OO.ui.SelectFileWidget.prototype.onDropTargetClick = function () {
6511         if ( this.isSupported && !this.isDisabled() && this.$input ) {
6512                 this.$input.click();
6513                 return false;
6514         }
6515 };
6516
6517 /**
6518  * Handle drag enter and over events
6519  *
6520  * @private
6521  * @param {jQuery.Event} e Drag event
6522  */
6523 OO.ui.SelectFileWidget.prototype.onDragEnterOrOver = function ( e ) {
6524         var itemOrFile,
6525                 droppableFile = false,
6526                 dt = e.originalEvent.dataTransfer;
6527
6528         e.preventDefault();
6529         e.stopPropagation();
6530
6531         if ( this.isDisabled() || !this.isSupported ) {
6532                 this.$element.removeClass( 'oo-ui-selectFileWidget-canDrop' );
6533                 dt.dropEffect = 'none';
6534                 return false;
6535         }
6536
6537         // DataTransferItem and File both have a type property, but in Chrome files
6538         // have no information at this point.
6539         itemOrFile = OO.getProp( dt, 'items', 0 ) || OO.getProp( dt, 'files', 0 );
6540         if ( itemOrFile ) {
6541                 if ( this.isAllowedType( itemOrFile.type ) ) {
6542                         droppableFile = true;
6543                 }
6544         // dt.types is Array-like, but not an Array
6545         } else if ( Array.prototype.indexOf.call( OO.getProp( dt, 'types' ) || [], 'Files' ) !== -1 ) {
6546                 // File information is not available at this point for security so just assume
6547                 // it is acceptable for now.
6548                 // https://bugzilla.mozilla.org/show_bug.cgi?id=640534
6549                 droppableFile = true;
6550         }
6551
6552         this.$element.toggleClass( 'oo-ui-selectFileWidget-canDrop', droppableFile );
6553         if ( !droppableFile ) {
6554                 dt.dropEffect = 'none';
6555         }
6556
6557         return false;
6558 };
6559
6560 /**
6561  * Handle drag leave events
6562  *
6563  * @private
6564  * @param {jQuery.Event} e Drag event
6565  */
6566 OO.ui.SelectFileWidget.prototype.onDragLeave = function () {
6567         this.$element.removeClass( 'oo-ui-selectFileWidget-canDrop' );
6568 };
6569
6570 /**
6571  * Handle drop events
6572  *
6573  * @private
6574  * @param {jQuery.Event} e Drop event
6575  */
6576 OO.ui.SelectFileWidget.prototype.onDrop = function ( e ) {
6577         var file = null,
6578                 dt = e.originalEvent.dataTransfer;
6579
6580         e.preventDefault();
6581         e.stopPropagation();
6582         this.$element.removeClass( 'oo-ui-selectFileWidget-canDrop' );
6583
6584         if ( this.isDisabled() || !this.isSupported ) {
6585                 return false;
6586         }
6587
6588         file = OO.getProp( dt, 'files', 0 );
6589         if ( file && !this.isAllowedType( file.type ) ) {
6590                 file = null;
6591         }
6592         if ( file ) {
6593                 this.setValue( file );
6594         }
6595
6596         return false;
6597 };
6598
6599 /**
6600  * @inheritdoc
6601  */
6602 OO.ui.SelectFileWidget.prototype.setDisabled = function ( disabled ) {
6603         OO.ui.SelectFileWidget.parent.prototype.setDisabled.call( this, disabled );
6604         if ( this.selectButton ) {
6605                 this.selectButton.setDisabled( disabled );
6606         }
6607         if ( this.clearButton ) {
6608                 this.clearButton.setDisabled( disabled );
6609         }
6610         return this;
6611 };
6612
6613 /**
6614  * SearchWidgets combine a {@link OO.ui.TextInputWidget text input field}, where users can type a search query,
6615  * and a menu of search results, which is displayed beneath the query
6616  * field. Unlike {@link OO.ui.mixin.LookupElement lookup menus}, search result menus are always visible to the user.
6617  * Users can choose an item from the menu or type a query into the text field to search for a matching result item.
6618  * In general, search widgets are used inside a separate {@link OO.ui.Dialog dialog} window.
6619  *
6620  * Each time the query is changed, the search result menu is cleared and repopulated. Please see
6621  * the [OOUI demos][1] for an example.
6622  *
6623  * [1]: https://doc.wikimedia.org/oojs-ui/master/demos/#SearchInputWidget-type-search
6624  *
6625  * @class
6626  * @extends OO.ui.Widget
6627  *
6628  * @constructor
6629  * @param {Object} [config] Configuration options
6630  * @cfg {string|jQuery} [placeholder] Placeholder text for query input
6631  * @cfg {string} [value] Initial query value
6632  */
6633 OO.ui.SearchWidget = function OoUiSearchWidget( config ) {
6634         // Configuration initialization
6635         config = config || {};
6636
6637         // Parent constructor
6638         OO.ui.SearchWidget.parent.call( this, config );
6639
6640         // Properties
6641         this.query = new OO.ui.TextInputWidget( {
6642                 icon: 'search',
6643                 placeholder: config.placeholder,
6644                 value: config.value
6645         } );
6646         this.results = new OO.ui.SelectWidget();
6647         this.$query = $( '<div>' );
6648         this.$results = $( '<div>' );
6649
6650         // Events
6651         this.query.connect( this, {
6652                 change: 'onQueryChange',
6653                 enter: 'onQueryEnter'
6654         } );
6655         this.query.$input.on( 'keydown', this.onQueryKeydown.bind( this ) );
6656
6657         // Initialization
6658         this.$query
6659                 .addClass( 'oo-ui-searchWidget-query' )
6660                 .append( this.query.$element );
6661         this.$results
6662                 .addClass( 'oo-ui-searchWidget-results' )
6663                 .append( this.results.$element );
6664         this.$element
6665                 .addClass( 'oo-ui-searchWidget' )
6666                 .append( this.$results, this.$query );
6667 };
6668
6669 /* Setup */
6670
6671 OO.inheritClass( OO.ui.SearchWidget, OO.ui.Widget );
6672
6673 /* Methods */
6674
6675 /**
6676  * Handle query key down events.
6677  *
6678  * @private
6679  * @param {jQuery.Event} e Key down event
6680  */
6681 OO.ui.SearchWidget.prototype.onQueryKeydown = function ( e ) {
6682         var highlightedItem, nextItem,
6683                 dir = e.which === OO.ui.Keys.DOWN ? 1 : ( e.which === OO.ui.Keys.UP ? -1 : 0 );
6684
6685         if ( dir ) {
6686                 highlightedItem = this.results.findHighlightedItem();
6687                 if ( !highlightedItem ) {
6688                         highlightedItem = this.results.findSelectedItem();
6689                 }
6690                 nextItem = this.results.findRelativeSelectableItem( highlightedItem, dir );
6691                 this.results.highlightItem( nextItem );
6692                 nextItem.scrollElementIntoView();
6693         }
6694 };
6695
6696 /**
6697  * Handle select widget select events.
6698  *
6699  * Clears existing results. Subclasses should repopulate items according to new query.
6700  *
6701  * @private
6702  * @param {string} value New value
6703  */
6704 OO.ui.SearchWidget.prototype.onQueryChange = function () {
6705         // Reset
6706         this.results.clearItems();
6707 };
6708
6709 /**
6710  * Handle select widget enter key events.
6711  *
6712  * Chooses highlighted item.
6713  *
6714  * @private
6715  * @param {string} value New value
6716  */
6717 OO.ui.SearchWidget.prototype.onQueryEnter = function () {
6718         var highlightedItem = this.results.findHighlightedItem();
6719         if ( highlightedItem ) {
6720                 this.results.chooseItem( highlightedItem );
6721         }
6722 };
6723
6724 /**
6725  * Get the query input.
6726  *
6727  * @return {OO.ui.TextInputWidget} Query input
6728  */
6729 OO.ui.SearchWidget.prototype.getQuery = function () {
6730         return this.query;
6731 };
6732
6733 /**
6734  * Get the search results menu.
6735  *
6736  * @return {OO.ui.SelectWidget} Menu of search results
6737  */
6738 OO.ui.SearchWidget.prototype.getResults = function () {
6739         return this.results;
6740 };
6741
6742 }( OO ) );
6743
6744 //# sourceMappingURL=oojs-ui-widgets.js.map.json