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