resources/src/mediawiki.rcfilters/ui/mw.rcfilters.ui.FilterTagMultiselectWidget.js

   1 ( function ( mw ) {
   2         /**
   3          * List displaying all filter groups
   4          *
   5          * @class
   6          * @extends OO.ui.MenuTagMultiselectWidget
   7          * @mixins OO.ui.mixin.PendingElement
   8          *
   9          * @constructor
  10          * @param {mw.rcfilters.Controller} controller Controller
  11          * @param {mw.rcfilters.dm.FiltersViewModel} model View model
  12          * @param {mw.rcfilters.dm.SavedQueriesModel} savedQueriesModel Saved queries model
  13          * @param {Object} config Configuration object
  14          * @cfg {jQuery} [$overlay] A jQuery object serving as overlay for popups
  15          */
  16         mw.rcfilters.ui.FilterTagMultiselectWidget = function MwRcfiltersUiFilterTagMultiselectWidget( controller, model, savedQueriesModel, config ) {
  17                 var rcFiltersRow,
  18                         title = new OO.ui.LabelWidget( {
  19                                 label: mw.msg( 'rcfilters-activefilters' ),
  20                                 classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-content-title' ]
  21                         } ),
  22                         $contentWrapper = $( '<div>' )
  23                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper' );
  24
  25                 config = config || {};
  26
  27                 this.controller = controller;
  28                 this.model = model;
  29                 this.queriesModel = savedQueriesModel;
  30                 this.$overlay = config.$overlay || this.$element;
  31                 this.matchingQuery = null;
  32                 this.currentView = this.model.getCurrentView();
  33
  34                 // Parent
  35                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.call( this, $.extend( true, {
  36                         label: mw.msg( 'rcfilters-filterlist-title' ),
  37                         placeholder: mw.msg( 'rcfilters-empty-filter' ),
  38                         inputPosition: 'outline',
  39                         allowArbitrary: false,
  40                         allowDisplayInvalidTags: false,
  41                         allowReordering: false,
  42                         $overlay: this.$overlay,
  43                         menu: {
  44                                 hideWhenOutOfView: false,
  45                                 hideOnChoose: false,
  46                                 width: 650,
  47                                 footers: [
  48                                         {
  49                                                 name: 'viewSelect',
  50                                                 sticky: false,
  51                                                 // View select menu, appears on default view only
  52                                                 $element: $( '<div>' )
  53                                                         .append( new mw.rcfilters.ui.ViewSwitchWidget( this.controller, this.model ).$element ),
  54                                                 views: [ 'default' ]
  55                                         },
  56                                         {
  57                                                 name: 'feedback',
  58                                                 // Feedback footer, appears on all views
  59                                                 $element: $( '<div>' )
  60                                                         .append(
  61                                                                 new OO.ui.ButtonWidget( {
  62                                                                         framed: false,
  63                                                                         icon: 'feedback',
  64                                                                         flags: [ 'progressive' ],
  65                                                                         label: mw.msg( 'rcfilters-filterlist-feedbacklink' ),
  66                                                                         href: 'https://www.mediawiki.org/wiki/Help_talk:New_filters_for_edit_review'
  67                                                                 } ).$element
  68                                                         )
  69                                         }
  70                                 ]
  71                         },
  72                         input: {
  73                                 icon: 'menu',
  74                                 placeholder: mw.msg( 'rcfilters-search-placeholder' )
  75                         }
  76                 }, config ) );
  77
  78                 this.savedQueryTitle = new OO.ui.LabelWidget( {
  79                         label: '',
  80                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-content-savedQueryTitle' ]
  81                 } );
  82
  83                 this.resetButton = new OO.ui.ButtonWidget( {
  84                         framed: false,
  85                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-resetButton' ]
  86                 } );
  87
  88                 if ( !mw.user.isAnon() ) {
  89                         this.saveQueryButton = new mw.rcfilters.ui.SaveFiltersPopupButtonWidget(
  90                                 this.controller,
  91                                 this.queriesModel,
  92                                 {
  93                                         $overlay: this.$overlay
  94                                 }
  95                         );
  96
  97                         this.saveQueryButton.$element.on( 'mousedown', function ( e ) { e.stopPropagation(); } );
  98
  99                         this.saveQueryButton.connect( this, {
 100                                 click: 'onSaveQueryButtonClick',
 101                                 saveCurrent: 'setSavedQueryVisibility'
 102                         } );
 103                         this.queriesModel.connect( this, {
 104                                 itemUpdate: 'onSavedQueriesItemUpdate',
 105                                 initialize: 'onSavedQueriesInitialize',
 106                                 'default': 'reevaluateResetRestoreState'
 107                         } );
 108                 }
 109
 110                 this.emptyFilterMessage = new OO.ui.LabelWidget( {
 111                         label: mw.msg( 'rcfilters-empty-filter' ),
 112                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-emptyFilters' ]
 113                 } );
 114                 this.$content.append( this.emptyFilterMessage.$element );
 115
 116                 // Events
 117                 this.resetButton.connect( this, { click: 'onResetButtonClick' } );
 118                 // Stop propagation for mousedown, so that the widget doesn't
 119                 // trigger the focus on the input and scrolls up when we click the reset button
 120                 this.resetButton.$element.on( 'mousedown', function ( e ) { e.stopPropagation(); } );
 121                 this.model.connect( this, {
 122                         initialize: 'onModelInitialize',
 123                         update: 'onModelUpdate',
 124                         itemUpdate: 'onModelItemUpdate',
 125                         highlightChange: 'onModelHighlightChange'
 126                 } );
 127                 this.input.connect( this, { change: 'onInputChange' } );
 128
 129                 // The filter list and button should appear side by side regardless of how
 130                 // wide the button is; the button also changes its width depending
 131                 // on language and its state, so the safest way to present both side
 132                 // by side is with a table layout
 133                 rcFiltersRow = $( '<div>' )
 134                         .addClass( 'mw-rcfilters-ui-row' )
 135                         .append(
 136                                 this.$content
 137                                         .addClass( 'mw-rcfilters-ui-cell' )
 138                                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-filters' )
 139                         );
 140
 141                 if ( !mw.user.isAnon() ) {
 142                         rcFiltersRow.append(
 143                                 $( '<div>' )
 144                                         .addClass( 'mw-rcfilters-ui-cell' )
 145                                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-save' )
 146                                         .append( this.saveQueryButton.$element )
 147                         );
 148                 }
 149
 150                 // Add a selector at the right of the input
 151                 this.viewsSelectWidget = new OO.ui.ButtonSelectWidget( {
 152                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-views-select-widget' ],
 153                         items: [
 154                                 new OO.ui.ButtonOptionWidget( {
 155                                         framed: false,
 156                                         data: 'namespaces',
 157                                         icon: 'article',
 158                                         label: mw.msg( 'namespaces' ),
 159                                         title: mw.msg( 'rcfilters-view-namespaces-tooltip' )
 160                                 } ),
 161                                 new OO.ui.ButtonOptionWidget( {
 162                                         framed: false,
 163                                         data: 'tags',
 164                                         icon: 'tag',
 165                                         label: mw.msg( 'tags-title' ),
 166                                         title: mw.msg( 'rcfilters-view-tags-tooltip' )
 167                                 } )
 168                         ]
 169                 } );
 170
 171                 // Rearrange the UI so the select widget is at the right of the input
 172                 this.$element.append(
 173                         $( '<div>' )
 174                                 .addClass( 'mw-rcfilters-ui-table' )
 175                                 .append(
 176                                         $( '<div>' )
 177                                                 .addClass( 'mw-rcfilters-ui-row' )
 178                                                 .append(
 179                                                         $( '<div>' )
 180                                                                 .addClass( 'mw-rcfilters-ui-cell' )
 181                                                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-input' )
 182                                                                 .append( this.input.$element ),
 183                                                         $( '<div>' )
 184                                                                 .addClass( 'mw-rcfilters-ui-cell' )
 185                                                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-select' )
 186                                                                 .append( this.viewsSelectWidget.$element )
 187                                                 )
 188                                 )
 189                 );
 190
 191                 // Event
 192                 this.viewsSelectWidget.connect( this, { choose: 'onViewsSelectWidgetChoose' } );
 193
 194                 rcFiltersRow.append(
 195                         $( '<div>' )
 196                                 .addClass( 'mw-rcfilters-ui-cell' )
 197                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-reset' )
 198                                 .append( this.resetButton.$element )
 199                 );
 200
 201                 // Build the content
 202                 $contentWrapper.append(
 203                         title.$element,
 204                         this.savedQueryTitle.$element,
 205                         $( '<div>' )
 206                                 .addClass( 'mw-rcfilters-ui-table' )
 207                                 .append(
 208                                         rcFiltersRow
 209                                 )
 210                 );
 211
 212                 // Initialize
 213                 this.$handle.append( $contentWrapper );
 214                 this.emptyFilterMessage.toggle( this.isEmpty() );
 215                 this.savedQueryTitle.toggle( false );
 216
 217                 this.$element
 218                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget' );
 219
 220                 this.reevaluateResetRestoreState();
 221         };
 222
 223         /* Initialization */
 224
 225         OO.inheritClass( mw.rcfilters.ui.FilterTagMultiselectWidget, OO.ui.MenuTagMultiselectWidget );
 226
 227         /* Methods */
 228
 229         /**
 230          * Respond to view select widget choose event
 231          *
 232          * @param {OO.ui.ButtonOptionWidget} buttonOptionWidget Chosen widget
 233          */
 234         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onViewsSelectWidgetChoose = function ( buttonOptionWidget ) {
 235                 this.controller.switchView( buttonOptionWidget.getData() );
 236                 this.viewsSelectWidget.selectItem( null );
 237                 this.focus();
 238         };
 239
 240         /**
 241          * Respond to input change event
 242          *
 243          * @param {string} value Value of the input
 244          */
 245         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onInputChange = function ( value ) {
 246                 var view;
 247
 248                 value = value.trim();
 249
 250                 view = this.model.getViewByTrigger( value.substr( 0, 1 ) );
 251
 252                 this.controller.switchView( view );
 253         };
 254         /**
 255          * Respond to query button click
 256          */
 257         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onSaveQueryButtonClick = function () {
 258                 this.getMenu().toggle( false );
 259         };
 260
 261         /**
 262          * Respond to save query model initialization
 263          */
 264         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onSavedQueriesInitialize = function () {
 265                 this.setSavedQueryVisibility();
 266         };
 267
 268         /**
 269          * Respond to save query item change. Mainly this is done to update the label in case
 270          * a query item has been edited
 271          *
 272          * @param {mw.rcfilters.dm.SavedQueryItemModel} item Saved query item
 273          */
 274         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onSavedQueriesItemUpdate = function ( item ) {
 275                 if ( this.matchingQuery === item ) {
 276                         // This means we just edited the item that is currently matched
 277                         this.savedQueryTitle.setLabel( item.getLabel() );
 278                 }
 279         };
 280
 281         /**
 282          * Respond to menu toggle
 283          *
 284          * @param {boolean} isVisible Menu is visible
 285          */
 286         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onMenuToggle = function ( isVisible ) {
 287                 // Parent
 288                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onMenuToggle.call( this );
 289
 290                 if ( isVisible ) {
 291                         this.focus();
 292
 293                         mw.hook( 'RcFilters.popup.open' ).fire();
 294
 295                         if ( !this.getMenu().getSelectedItem() ) {
 296                                 // If there are no selected items, scroll menu to top
 297                                 // This has to be in a setTimeout so the menu has time
 298                                 // to be positioned and fixed
 299                                 setTimeout( function () { this.getMenu().scrollToTop(); }.bind( this ), 0 );
 300                         }
 301                 } else {
 302                         this.blur();
 303
 304                         // Clear selection
 305                         this.selectTag( null );
 306
 307                         // Clear input if the only thing in the input is the prefix
 308                         if (
 309                                 this.input.getValue().trim() === this.model.getViewTrigger( this.model.getCurrentView() )
 310                         ) {
 311                                 // Clear the input
 312                                 this.input.setValue( '' );
 313                         }
 314
 315                         // Log filter grouping
 316                         this.controller.trackFilterGroupings( 'filtermenu' );
 317                 }
 318
 319                 this.input.setIcon( isVisible ? 'search' : 'menu' );
 320         };
 321
 322         /**
 323          * @inheritdoc
 324          */
 325         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onInputFocus = function () {
 326                 // Parent
 327                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onInputFocus.call( this );
 328
 329                 // Only scroll to top of the viewport if:
 330                 // - The widget is more than 20px from the top
 331                 // - The widget is not above the top of the viewport (do not scroll downwards)
 332                 //   (This isn't represented because >20 is, anyways and always, bigger than 0)
 333                 this.scrollToTop( this.$element, 0, { min: 20, max: Infinity } );
 334         };
 335
 336         /**
 337          * @inheritdoc
 338          */
 339         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.doInputEscape = function () {
 340                 // Parent
 341                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.doInputEscape.call( this );
 342
 343                 // Blur the input
 344                 this.input.$input.blur();
 345         };
 346
 347         /**
 348          * @inheritdoc
 349          */
 350         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onMouseDown = function ( e ) {
 351                 if ( !this.isDisabled() && e.which === OO.ui.MouseButtons.LEFT ) {
 352                         this.menu.toggle();
 353
 354                         return false;
 355                 }
 356         };
 357
 358         /**
 359          * @inheritdoc
 360          */
 361         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onChangeTags = function () {
 362                 // Parent method
 363                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onChangeTags.call( this );
 364
 365                 this.emptyFilterMessage.toggle( this.isEmpty() );
 366         };
 367
 368         /**
 369          * Respond to model initialize event
 370          */
 371         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onModelInitialize = function () {
 372                 this.setSavedQueryVisibility();
 373         };
 374
 375         /**
 376          * Respond to model update event
 377          */
 378         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onModelUpdate = function () {
 379                 this.updateElementsForView();
 380         };
 381
 382         /**
 383          * Update the elements in the widget to the current view
 384          */
 385         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.updateElementsForView = function () {
 386                 var view = this.model.getCurrentView(),
 387                         inputValue = this.input.getValue().trim(),
 388                         inputView = this.model.getViewByTrigger( inputValue.substr( 0, 1 ) );
 389
 390                 if ( inputView !== 'default' ) {
 391                         // We have a prefix already, remove it
 392                         inputValue = inputValue.substr( 1 );
 393                 }
 394
 395                 if ( inputView !== view ) {
 396                         // Add the correct prefix
 397                         inputValue = this.model.getViewTrigger( view ) + inputValue;
 398                 }
 399
 400                 // Update input
 401                 this.input.setValue( inputValue );
 402
 403                 if ( this.currentView !== view ) {
 404                         this.scrollToTop( this.$element );
 405                         this.currentView = view;
 406                 }
 407         };
 408
 409         /**
 410          * Set the visibility of the saved query button
 411          */
 412         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.setSavedQueryVisibility = function () {
 413                 if ( mw.user.isAnon() ) {
 414                         return;
 415                 }
 416
 417                 this.matchingQuery = this.controller.findQueryMatchingCurrentState();
 418
 419                 this.savedQueryTitle.setLabel(
 420                         this.matchingQuery ? this.matchingQuery.getLabel() : ''
 421                 );
 422                 this.savedQueryTitle.toggle( !!this.matchingQuery );
 423                 this.saveQueryButton.setDisabled( !!this.matchingQuery );
 424                 this.saveQueryButton.setTitle( !this.matchingQuery ?
 425                         mw.msg( 'rcfilters-savedqueries-add-new-title' ) :
 426                         mw.msg( 'rcfilters-savedqueries-already-saved' ) );
 427
 428                 if ( this.matchingQuery ) {
 429                         this.emphasize();
 430                 }
 431         };
 432
 433         /**
 434          * Respond to model itemUpdate event
 435          * fixme: when a new state is applied to the model this function is called 60+ times in a row
 436          *
 437          * @param {mw.rcfilters.dm.FilterItem} item Filter item model
 438          */
 439         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onModelItemUpdate = function ( item ) {
 440                 if ( !item.getGroupModel().isHidden() ) {
 441                         if (
 442                                 item.isSelected() ||
 443                                 (
 444                                         this.model.isHighlightEnabled() &&
 445                                         item.getHighlightColor()
 446                                 )
 447                         ) {
 448                                 this.addTag( item.getName(), item.getLabel() );
 449                         } else {
 450                                 this.removeTagByData( item.getName() );
 451                         }
 452                 }
 453
 454                 this.setSavedQueryVisibility();
 455
 456                 // Re-evaluate reset state
 457                 this.reevaluateResetRestoreState();
 458         };
 459
 460         /**
 461          * @inheritdoc
 462          */
 463         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.isAllowedData = function ( data ) {
 464                 return (
 465                         this.model.getItemByName( data ) &&
 466                         !this.isDuplicateData( data )
 467                 );
 468         };
 469
 470         /**
 471          * @inheritdoc
 472          */
 473         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onMenuChoose = function ( item ) {
 474                 this.controller.toggleFilterSelect( item.model.getName() );
 475
 476                 // Select the tag if it exists, or reset selection otherwise
 477                 this.selectTag( this.getItemFromData( item.model.getName() ) );
 478
 479                 this.focus();
 480         };
 481
 482         /**
 483          * Respond to highlightChange event
 484          *
 485          * @param {boolean} isHighlightEnabled Highlight is enabled
 486          */
 487         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onModelHighlightChange = function ( isHighlightEnabled ) {
 488                 var highlightedItems = this.model.getHighlightedItems();
 489
 490                 if ( isHighlightEnabled ) {
 491                         // Add capsule widgets
 492                         highlightedItems.forEach( function ( filterItem ) {
 493                                 this.addTag( filterItem.getName(), filterItem.getLabel() );
 494                         }.bind( this ) );
 495                 } else {
 496                         // Remove capsule widgets if they're not selected
 497                         highlightedItems.forEach( function ( filterItem ) {
 498                                 if ( !filterItem.isSelected() ) {
 499                                         this.removeTagByData( filterItem.getName() );
 500                                 }
 501                         }.bind( this ) );
 502                 }
 503
 504                 this.setSavedQueryVisibility();
 505         };
 506
 507         /**
 508          * @inheritdoc
 509          */
 510         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onTagSelect = function ( tagItem ) {
 511                 var widget = this,
 512                         menuOption = this.menu.getItemFromModel( tagItem.getModel() ),
 513                         oldInputValue = this.input.getValue().trim();
 514
 515                 this.menu.setUserSelecting( true );
 516
 517                 // Reset input
 518                 this.input.setValue( '' );
 519
 520                 // Switch view
 521                 this.controller.switchView( tagItem.getView() );
 522
 523                 // Parent method
 524                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onTagSelect.call( this, tagItem );
 525
 526                 this.menu.selectItem( menuOption );
 527                 this.selectTag( tagItem );
 528
 529                 // Scroll to the item
 530                 if ( this.model.removeViewTriggers( oldInputValue ) ) {
 531                         // We're binding a 'once' to the itemVisibilityChange event
 532                         // so this happens when the menu is ready after the items
 533                         // are visible again, in case this is done right after the
 534                         // user filtered the results
 535                         this.getMenu().once(
 536                                 'itemVisibilityChange',
 537                                 function () {
 538                                         widget.scrollToTop( menuOption.$element );
 539                                         widget.menu.setUserSelecting( false );
 540                                 }
 541                         );
 542                 } else {
 543                         this.scrollToTop( menuOption.$element );
 544                         this.menu.setUserSelecting( false );
 545                 }
 546
 547         };
 548
 549         /**
 550          * Select a tag by reference. This is what OO.ui.SelectWidget is doing.
 551          * If no items are given, reset selection from all.
 552          *
 553          * @param {mw.rcfilters.ui.FilterTagItemWidget} [item] Tag to select,
 554          *  omit to deselect all
 555          */
 556         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.selectTag = function ( item ) {
 557                 var i, len, selected;
 558
 559                 for ( i = 0, len = this.items.length; i < len; i++ ) {
 560                         selected = this.items[ i ] === item;
 561                         if ( this.items[ i ].isSelected() !== selected ) {
 562                                 this.items[ i ].toggleSelected( selected );
 563                         }
 564                 }
 565         };
 566         /**
 567          * @inheritdoc
 568          */
 569         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onTagRemove = function ( tagItem ) {
 570                 // Parent method
 571                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onTagRemove.call( this, tagItem );
 572
 573                 this.controller.clearFilter( tagItem.getName() );
 574
 575                 tagItem.destroy();
 576         };
 577
 578         /**
 579          * Respond to click event on the reset button
 580          */
 581         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onResetButtonClick = function () {
 582                 if ( this.model.areVisibleFiltersEmpty() ) {
 583                         // Reset to default filters
 584                         this.controller.resetToDefaults();
 585                 } else {
 586                         // Reset to have no filters
 587                         this.controller.emptyFilters();
 588                 }
 589         };
 590
 591         /**
 592          * Reevaluate the restore state for the widget between setting to defaults and clearing all filters
 593          */
 594         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.reevaluateResetRestoreState = function () {
 595                 var defaultsAreEmpty = this.controller.areDefaultsEmpty(),
 596                         currFiltersAreEmpty = this.model.areVisibleFiltersEmpty(),
 597                         hideResetButton = currFiltersAreEmpty && defaultsAreEmpty;
 598
 599                 this.resetButton.setIcon(
 600                         currFiltersAreEmpty ? 'history' : 'trash'
 601                 );
 602
 603                 this.resetButton.setLabel(
 604                         currFiltersAreEmpty ? mw.msg( 'rcfilters-restore-default-filters' ) : ''
 605                 );
 606                 this.resetButton.setTitle(
 607                         currFiltersAreEmpty ? null : mw.msg( 'rcfilters-clear-all-filters' )
 608                 );
 609
 610                 this.resetButton.toggle( !hideResetButton );
 611                 this.emptyFilterMessage.toggle( currFiltersAreEmpty );
 612         };
 613
 614         /**
 615          * @inheritdoc
 616          */
 617         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.createMenuWidget = function ( menuConfig ) {
 618                 return new mw.rcfilters.ui.MenuSelectWidget(
 619                         this.controller,
 620                         this.model,
 621                         $.extend( {
 622                                 filterFromInput: true
 623                         }, menuConfig )
 624                 );
 625         };
 626
 627         /**
 628          * @inheritdoc
 629          */
 630         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.createTagItemWidget = function ( data ) {
 631                 var filterItem = this.model.getItemByName( data );
 632
 633                 if ( filterItem ) {
 634                         return new mw.rcfilters.ui.FilterTagItemWidget(
 635                                 this.controller,
 636                                 this.model,
 637                                 this.model.getInvertModel(),
 638                                 filterItem,
 639                                 {
 640                                         $overlay: this.$overlay
 641                                 }
 642                         );
 643                 }
 644         };
 645
 646         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.emphasize = function () {
 647                 if (
 648                         !this.$handle.hasClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' )
 649                 ) {
 650                         this.$handle
 651                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-emphasize' )
 652                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' );
 653
 654                         setTimeout( function () {
 655                                 this.$handle
 656                                         .removeClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-emphasize' );
 657
 658                                 setTimeout( function () {
 659                                         this.$handle
 660                                                 .removeClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' );
 661                                 }.bind( this ), 1000 );
 662                         }.bind( this ), 500 );
 663
 664                 }
 665         };
 666         /**
 667          * Scroll the element to top within its container
 668          *
 669          * @private
 670          * @param {jQuery} $element Element to position
 671          * @param {number} [marginFromTop=0] When scrolling the entire widget to the top, leave this
 672          *  much space (in pixels) above the widget.
 673          * @param {Object} [threshold] Minimum distance from the top of the element to scroll at all
 674          * @param {number} [threshold.min] Minimum distance above the element
 675          * @param {number} [threshold.max] Minimum distance below the element
 676          */
 677         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.scrollToTop = function ( $element, marginFromTop, threshold ) {
 678                 var container = OO.ui.Element.static.getClosestScrollableContainer( $element[ 0 ], 'y' ),
 679                         pos = OO.ui.Element.static.getRelativePosition( $element, $( container ) ),
 680                         containerScrollTop = $( container ).scrollTop(),
 681                         effectiveScrollTop = $( container ).is( 'body, html' ) ? 0 : containerScrollTop,
 682                         newScrollTop = effectiveScrollTop + pos.top - ( marginFromTop || 0 );
 683
 684                 // Scroll to item
 685                 if (
 686                         threshold === undefined ||
 687                         (
 688                                 (
 689                                         threshold.min === undefined ||
 690                                         newScrollTop - containerScrollTop >= threshold.min
 691                                 ) &&
 692                                 (
 693                                         threshold.max === undefined ||
 694                                         newScrollTop - containerScrollTop <= threshold.max
 695                                 )
 696                         )
 697                 ) {
 698                         $( container ).animate( {
 699                                 scrollTop: newScrollTop
 700                         } );
 701                 }
 702         };
 703 }( mediaWiki ) );