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