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