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

   1 ( function () {
   2         var ViewSwitchWidget = require( './ViewSwitchWidget.js' ),
   3                 SaveFiltersPopupButtonWidget = require( './SaveFiltersPopupButtonWidget.js' ),
   4                 MenuSelectWidget = require( './MenuSelectWidget.js' ),
   5                 FilterTagItemWidget = require( './FilterTagItemWidget.js' ),
   6                 FilterTagMultiselectWidget;
   7
   8         /**
   9          * List displaying all filter groups
  10          *
  11          * @class mw.rcfilters.ui.FilterTagMultiselectWidget
  12          * @extends OO.ui.MenuTagMultiselectWidget
  13          * @mixins OO.ui.mixin.PendingElement
  14          *
  15          * @constructor
  16          * @param {mw.rcfilters.Controller} controller Controller
  17          * @param {mw.rcfilters.dm.FiltersViewModel} model View model
  18          * @param {mw.rcfilters.dm.SavedQueriesModel} savedQueriesModel Saved queries model
  19          * @param {Object} config Configuration object
  20          * @cfg {jQuery} [$overlay] A jQuery object serving as overlay for popups
  21          * @cfg {jQuery} [$wrapper] A jQuery object for the wrapper of the general
  22          *  system. If not given, falls back to this widget's $element
  23          * @cfg {boolean} [collapsed] Filter area is collapsed
  24          */
  25         FilterTagMultiselectWidget = function MwRcfiltersUiFilterTagMultiselectWidget( controller, model, savedQueriesModel, config ) {
  26                 var rcFiltersRow,
  27                         title = new OO.ui.LabelWidget( {
  28                                 label: mw.msg( 'rcfilters-activefilters' ),
  29                                 classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-content-title' ]
  30                         } ),
  31                         $contentWrapper = $( '<div>' )
  32                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper' );
  33
  34                 config = config || {};
  35
  36                 this.controller = controller;
  37                 this.model = model;
  38                 this.queriesModel = savedQueriesModel;
  39                 this.$overlay = config.$overlay || this.$element;
  40                 this.$wrapper = config.$wrapper || this.$element;
  41                 this.matchingQuery = null;
  42                 this.currentView = this.model.getCurrentView();
  43                 this.collapsed = false;
  44
  45                 // Parent
  46                 FilterTagMultiselectWidget.parent.call( this, $.extend( true, {
  47                         label: mw.msg( 'rcfilters-filterlist-title' ),
  48                         placeholder: mw.msg( 'rcfilters-empty-filter' ),
  49                         inputPosition: 'outline',
  50                         allowArbitrary: false,
  51                         allowDisplayInvalidTags: false,
  52                         allowReordering: false,
  53                         $overlay: this.$overlay,
  54                         menu: {
  55                                 // Our filtering is done through the model
  56                                 filterFromInput: false,
  57                                 hideWhenOutOfView: false,
  58                                 hideOnChoose: false,
  59                                 width: 650,
  60                                 footers: [
  61                                         {
  62                                                 name: 'viewSelect',
  63                                                 sticky: false,
  64                                                 // View select menu, appears on default view only
  65                                                 $element: $( '<div>' )
  66                                                         .append( new ViewSwitchWidget( this.controller, this.model ).$element ),
  67                                                 views: [ 'default' ]
  68                                         },
  69                                         {
  70                                                 name: 'feedback',
  71                                                 // Feedback footer, appears on all views
  72                                                 $element: $( '<div>' )
  73                                                         .append(
  74                                                                 new OO.ui.ButtonWidget( {
  75                                                                         framed: false,
  76                                                                         icon: 'feedback',
  77                                                                         flags: [ 'progressive' ],
  78                                                                         label: mw.msg( 'rcfilters-filterlist-feedbacklink' ),
  79                                                                         href: 'https://www.mediawiki.org/wiki/Help_talk:New_filters_for_edit_review'
  80                                                                 } ).$element
  81                                                         )
  82                                         }
  83                                 ]
  84                         },
  85                         input: {
  86                                 icon: 'menu',
  87                                 placeholder: mw.msg( 'rcfilters-search-placeholder' )
  88                         }
  89                 }, config ) );
  90
  91                 this.savedQueryTitle = new OO.ui.LabelWidget( {
  92                         label: '',
  93                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-content-savedQueryTitle' ]
  94                 } );
  95
  96                 this.resetButton = new OO.ui.ButtonWidget( {
  97                         framed: false,
  98                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-resetButton' ]
  99                 } );
 100
 101                 this.hideShowButton = new OO.ui.ButtonWidget( {
 102                         framed: false,
 103                         flags: [ 'progressive' ],
 104                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-hideshowButton' ]
 105                 } );
 106                 this.toggleCollapsed( !!config.collapsed );
 107
 108                 if ( !mw.user.isAnon() ) {
 109                         this.saveQueryButton = new SaveFiltersPopupButtonWidget(
 110                                 this.controller,
 111                                 this.queriesModel,
 112                                 {
 113                                         $overlay: this.$overlay
 114                                 }
 115                         );
 116
 117                         this.saveQueryButton.$element.on( 'mousedown', function ( e ) {
 118                                 e.stopPropagation();
 119                         } );
 120
 121                         this.saveQueryButton.connect( this, {
 122                                 click: 'onSaveQueryButtonClick',
 123                                 saveCurrent: 'setSavedQueryVisibility'
 124                         } );
 125                         this.queriesModel.connect( this, {
 126                                 itemUpdate: 'onSavedQueriesItemUpdate',
 127                                 initialize: 'onSavedQueriesInitialize',
 128                                 default: 'reevaluateResetRestoreState'
 129                         } );
 130                 }
 131
 132                 this.emptyFilterMessage = new OO.ui.LabelWidget( {
 133                         label: mw.msg( 'rcfilters-empty-filter' ),
 134                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-emptyFilters' ]
 135                 } );
 136                 this.$content.append( this.emptyFilterMessage.$element );
 137
 138                 // Events
 139                 this.resetButton.connect( this, { click: 'onResetButtonClick' } );
 140                 this.hideShowButton.connect( this, { click: 'onHideShowButtonClick' } );
 141                 // Stop propagation for mousedown, so that the widget doesn't
 142                 // trigger the focus on the input and scrolls up when we click the reset button
 143                 this.resetButton.$element.on( 'mousedown', function ( e ) {
 144                         e.stopPropagation();
 145                 } );
 146                 this.hideShowButton.$element.on( 'mousedown', function ( e ) {
 147                         e.stopPropagation();
 148                 } );
 149                 this.model.connect( this, {
 150                         initialize: 'onModelInitialize',
 151                         update: 'onModelUpdate',
 152                         searchChange: 'onModelSearchChange',
 153                         itemUpdate: 'onModelItemUpdate',
 154                         highlightChange: 'onModelHighlightChange'
 155                 } );
 156                 this.input.connect( this, { change: 'onInputChange' } );
 157
 158                 // The filter list and button should appear side by side regardless of how
 159                 // wide the button is; the button also changes its width depending
 160                 // on language and its state, so the safest way to present both side
 161                 // by side is with a table layout
 162                 rcFiltersRow = $( '<div>' )
 163                         .addClass( 'mw-rcfilters-ui-row' )
 164                         .append(
 165                                 this.$content
 166                                         .addClass( 'mw-rcfilters-ui-cell' )
 167                                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-filters' )
 168                         );
 169
 170                 if ( !mw.user.isAnon() ) {
 171                         rcFiltersRow.append(
 172                                 $( '<div>' )
 173                                         .addClass( 'mw-rcfilters-ui-cell' )
 174                                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-save' )
 175                                         .append( this.saveQueryButton.$element )
 176                         );
 177                 }
 178
 179                 // Add a selector at the right of the input
 180                 this.viewsSelectWidget = new OO.ui.ButtonSelectWidget( {
 181                         classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-views-select-widget' ],
 182                         items: [
 183                                 new OO.ui.ButtonOptionWidget( {
 184                                         framed: false,
 185                                         data: 'namespaces',
 186                                         icon: 'article',
 187                                         label: mw.msg( 'namespaces' ),
 188                                         title: mw.msg( 'rcfilters-view-namespaces-tooltip' )
 189                                 } ),
 190                                 new OO.ui.ButtonOptionWidget( {
 191                                         framed: false,
 192                                         data: 'tags',
 193                                         icon: 'tag',
 194                                         label: mw.msg( 'tags-title' ),
 195                                         title: mw.msg( 'rcfilters-view-tags-tooltip' )
 196                                 } )
 197                         ]
 198                 } );
 199
 200                 // Rearrange the UI so the select widget is at the right of the input
 201                 this.$element.append(
 202                         $( '<div>' )
 203                                 .addClass( 'mw-rcfilters-ui-table' )
 204                                 .append(
 205                                         $( '<div>' )
 206                                                 .addClass( 'mw-rcfilters-ui-row' )
 207                                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views' )
 208                                                 .append(
 209                                                         $( '<div>' )
 210                                                                 .addClass( 'mw-rcfilters-ui-cell' )
 211                                                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-input' )
 212                                                                 .append( this.input.$element ),
 213                                                         $( '<div>' )
 214                                                                 .addClass( 'mw-rcfilters-ui-cell' )
 215                                                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-select' )
 216                                                                 .append( this.viewsSelectWidget.$element )
 217                                                 )
 218                                 )
 219                 );
 220
 221                 // Event
 222                 this.viewsSelectWidget.connect( this, { choose: 'onViewsSelectWidgetChoose' } );
 223
 224                 rcFiltersRow.append(
 225                         $( '<div>' )
 226                                 .addClass( 'mw-rcfilters-ui-cell' )
 227                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-reset' )
 228                                 .append( this.resetButton.$element )
 229                 );
 230
 231                 // Build the content
 232                 $contentWrapper.append(
 233                         $( '<div>' )
 234                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-top' )
 235                                 .append(
 236                                         $( '<div>' )
 237                                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-top-title' )
 238                                                 .append( title.$element ),
 239                                         $( '<div>' )
 240                                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-top-queryName' )
 241                                                 .append( this.savedQueryTitle.$element ),
 242                                         $( '<div>' )
 243                                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-top-hideshow' )
 244                                                 .append(
 245                                                         this.hideShowButton.$element
 246                                                 )
 247                                 ),
 248                         $( '<div>' )
 249                                 .addClass( 'mw-rcfilters-ui-table' )
 250                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-filters' )
 251                                 .append( rcFiltersRow )
 252                 );
 253
 254                 // Initialize
 255                 this.$handle.append( $contentWrapper );
 256                 this.emptyFilterMessage.toggle( this.isEmpty() );
 257                 this.savedQueryTitle.toggle( false );
 258
 259                 this.$element
 260                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget' );
 261
 262                 this.reevaluateResetRestoreState();
 263         };
 264
 265         /* Initialization */
 266
 267         OO.inheritClass( FilterTagMultiselectWidget, OO.ui.MenuTagMultiselectWidget );
 268
 269         /* Methods */
 270
 271         /**
 272          * Override parent method to avoid unnecessary resize events.
 273          */
 274         FilterTagMultiselectWidget.prototype.updateIfHeightChanged = function () { };
 275
 276         /**
 277          * Respond to view select widget choose event
 278          *
 279          * @param {OO.ui.ButtonOptionWidget} buttonOptionWidget Chosen widget
 280          */
 281         FilterTagMultiselectWidget.prototype.onViewsSelectWidgetChoose = function ( buttonOptionWidget ) {
 282                 this.controller.switchView( buttonOptionWidget.getData() );
 283                 this.viewsSelectWidget.selectItem( null );
 284                 this.focus();
 285         };
 286
 287         /**
 288          * Respond to model search change event
 289          *
 290          * @param {string} value Search value
 291          */
 292         FilterTagMultiselectWidget.prototype.onModelSearchChange = function ( value ) {
 293                 this.input.setValue( value );
 294         };
 295
 296         /**
 297          * Respond to input change event
 298          *
 299          * @param {string} value Value of the input
 300          */
 301         FilterTagMultiselectWidget.prototype.onInputChange = function ( value ) {
 302                 this.controller.setSearch( value );
 303         };
 304
 305         /**
 306          * Respond to query button click
 307          */
 308         FilterTagMultiselectWidget.prototype.onSaveQueryButtonClick = function () {
 309                 this.getMenu().toggle( false );
 310         };
 311
 312         /**
 313          * Respond to save query model initialization
 314          */
 315         FilterTagMultiselectWidget.prototype.onSavedQueriesInitialize = function () {
 316                 this.setSavedQueryVisibility();
 317         };
 318
 319         /**
 320          * Respond to save query item change. Mainly this is done to update the label in case
 321          * a query item has been edited
 322          *
 323          * @param {mw.rcfilters.dm.SavedQueryItemModel} item Saved query item
 324          */
 325         FilterTagMultiselectWidget.prototype.onSavedQueriesItemUpdate = function ( item ) {
 326                 if ( this.matchingQuery === item ) {
 327                         // This means we just edited the item that is currently matched
 328                         this.savedQueryTitle.setLabel( item.getLabel() );
 329                 }
 330         };
 331
 332         /**
 333          * Respond to menu toggle
 334          *
 335          * @param {boolean} isVisible Menu is visible
 336          */
 337         FilterTagMultiselectWidget.prototype.onMenuToggle = function ( isVisible ) {
 338                 // Parent
 339                 FilterTagMultiselectWidget.parent.prototype.onMenuToggle.call( this );
 340
 341                 if ( isVisible ) {
 342                         this.focus();
 343
 344                         mw.hook( 'RcFilters.popup.open' ).fire();
 345
 346                         if ( !this.getMenu().findSelectedItem() ) {
 347                                 // If there are no selected items, scroll menu to top
 348                                 // This has to be in a setTimeout so the menu has time
 349                                 // to be positioned and fixed
 350                                 setTimeout(
 351                                         function () {
 352                                                 this.getMenu().scrollToTop();
 353                                         }.bind( this )
 354                                 );
 355                         }
 356                 } else {
 357                         // Clear selection
 358                         this.selectTag( null );
 359
 360                         // Clear the search
 361                         this.controller.setSearch( '' );
 362
 363                         // Log filter grouping
 364                         this.controller.trackFilterGroupings( 'filtermenu' );
 365
 366                         this.blur();
 367                 }
 368
 369                 this.input.setIcon( isVisible ? 'search' : 'menu' );
 370         };
 371
 372         /**
 373          * @inheritdoc
 374          */
 375         FilterTagMultiselectWidget.prototype.onInputFocus = function () {
 376                 // Parent
 377                 FilterTagMultiselectWidget.parent.prototype.onInputFocus.call( this );
 378
 379                 // Only scroll to top of the viewport if:
 380                 // - The widget is more than 20px from the top
 381                 // - The widget is not above the top of the viewport (do not scroll downwards)
 382                 //   (This isn't represented because >20 is, anyways and always, bigger than 0)
 383                 this.scrollToTop( this.$element, 0, { min: 20, max: Infinity } );
 384         };
 385
 386         /**
 387          * @inheritdoc
 388          */
 389         FilterTagMultiselectWidget.prototype.doInputEscape = function () {
 390                 // Parent
 391                 FilterTagMultiselectWidget.parent.prototype.doInputEscape.call( this );
 392
 393                 // Blur the input
 394                 this.input.$input.trigger( 'blur' );
 395         };
 396
 397         /**
 398          * @inheritdoc
 399          */
 400         FilterTagMultiselectWidget.prototype.onMouseDown = function ( e ) {
 401                 if ( !this.collapsed && !this.isDisabled() && e.which === OO.ui.MouseButtons.LEFT ) {
 402                         this.menu.toggle();
 403
 404                         return false;
 405                 }
 406         };
 407
 408         /**
 409          * @inheritdoc
 410          */
 411         FilterTagMultiselectWidget.prototype.onChangeTags = function () {
 412                 // If initialized, call parent method.
 413                 if ( this.controller.isInitialized() ) {
 414                         FilterTagMultiselectWidget.parent.prototype.onChangeTags.call( this );
 415                 }
 416
 417                 this.emptyFilterMessage.toggle( this.isEmpty() );
 418         };
 419
 420         /**
 421          * Respond to model initialize event
 422          */
 423         FilterTagMultiselectWidget.prototype.onModelInitialize = function () {
 424                 this.setSavedQueryVisibility();
 425         };
 426
 427         /**
 428          * Respond to model update event
 429          */
 430         FilterTagMultiselectWidget.prototype.onModelUpdate = function () {
 431                 this.updateElementsForView();
 432         };
 433
 434         /**
 435          * Update the elements in the widget to the current view
 436          */
 437         FilterTagMultiselectWidget.prototype.updateElementsForView = function () {
 438                 var view = this.model.getCurrentView(),
 439                         inputValue = this.input.getValue().trim(),
 440                         inputView = this.model.getViewByTrigger( inputValue.substr( 0, 1 ) );
 441
 442                 if ( inputView !== 'default' ) {
 443                         // We have a prefix already, remove it
 444                         inputValue = inputValue.substr( 1 );
 445                 }
 446
 447                 if ( inputView !== view ) {
 448                         // Add the correct prefix
 449                         inputValue = this.model.getViewTrigger( view ) + inputValue;
 450                 }
 451
 452                 // Update input
 453                 this.input.setValue( inputValue );
 454
 455                 if ( this.currentView !== view ) {
 456                         this.scrollToTop( this.$element );
 457                         this.currentView = view;
 458                 }
 459         };
 460
 461         /**
 462          * Set the visibility of the saved query button
 463          */
 464         FilterTagMultiselectWidget.prototype.setSavedQueryVisibility = function () {
 465                 if ( mw.user.isAnon() ) {
 466                         return;
 467                 }
 468
 469                 this.matchingQuery = this.controller.findQueryMatchingCurrentState();
 470
 471                 this.savedQueryTitle.setLabel(
 472                         this.matchingQuery ? this.matchingQuery.getLabel() : ''
 473                 );
 474                 this.savedQueryTitle.toggle( !!this.matchingQuery );
 475                 this.saveQueryButton.setDisabled( !!this.matchingQuery );
 476                 this.saveQueryButton.setTitle( !this.matchingQuery ?
 477                         mw.msg( 'rcfilters-savedqueries-add-new-title' ) :
 478                         mw.msg( 'rcfilters-savedqueries-already-saved' ) );
 479
 480                 if ( this.matchingQuery ) {
 481                         this.emphasize();
 482                 }
 483         };
 484
 485         /**
 486          * Respond to model itemUpdate event
 487          * fixme: when a new state is applied to the model this function is called 60+ times in a row
 488          *
 489          * @param {mw.rcfilters.dm.FilterItem} item Filter item model
 490          */
 491         FilterTagMultiselectWidget.prototype.onModelItemUpdate = function ( item ) {
 492                 if ( !item.getGroupModel().isHidden() ) {
 493                         if (
 494                                 item.isSelected() ||
 495                                 (
 496                                         this.model.isHighlightEnabled() &&
 497                                         item.getHighlightColor()
 498                                 )
 499                         ) {
 500                                 this.addTag( item.getName(), item.getLabel() );
 501                         } else {
 502                                 // Only attempt to remove the tag if we can find an item for it (T198140, T198231)
 503                                 if ( this.findItemFromData( item.getName() ) !== null ) {
 504                                         this.removeTagByData( item.getName() );
 505                                 }
 506                         }
 507                 }
 508
 509                 this.setSavedQueryVisibility();
 510
 511                 // Re-evaluate reset state
 512                 this.reevaluateResetRestoreState();
 513         };
 514
 515         /**
 516          * @inheritdoc
 517          */
 518         FilterTagMultiselectWidget.prototype.isAllowedData = function ( data ) {
 519                 return (
 520                         this.model.getItemByName( data ) &&
 521                         !this.isDuplicateData( data )
 522                 );
 523         };
 524
 525         /**
 526          * @inheritdoc
 527          */
 528         FilterTagMultiselectWidget.prototype.onMenuChoose = function ( item ) {
 529                 this.controller.toggleFilterSelect( item.model.getName() );
 530
 531                 // Select the tag if it exists, or reset selection otherwise
 532                 this.selectTag( this.findItemFromData( item.model.getName() ) );
 533
 534                 this.focus();
 535         };
 536
 537         /**
 538          * Respond to highlightChange event
 539          *
 540          * @param {boolean} isHighlightEnabled Highlight is enabled
 541          */
 542         FilterTagMultiselectWidget.prototype.onModelHighlightChange = function ( isHighlightEnabled ) {
 543                 var highlightedItems = this.model.getHighlightedItems();
 544
 545                 if ( isHighlightEnabled ) {
 546                         // Add capsule widgets
 547                         highlightedItems.forEach( function ( filterItem ) {
 548                                 this.addTag( filterItem.getName(), filterItem.getLabel() );
 549                         }.bind( this ) );
 550                 } else {
 551                         // Remove capsule widgets if they're not selected
 552                         highlightedItems.forEach( function ( filterItem ) {
 553                                 if ( !filterItem.isSelected() ) {
 554                                         // Only attempt to remove the tag if we can find an item for it (T198140, T198231)
 555                                         if ( this.findItemFromData( filterItem.getName() ) !== null ) {
 556                                                 this.removeTagByData( filterItem.getName() );
 557                                         }
 558                                 }
 559                         }.bind( this ) );
 560                 }
 561
 562                 this.setSavedQueryVisibility();
 563         };
 564
 565         /**
 566          * @inheritdoc
 567          */
 568         FilterTagMultiselectWidget.prototype.onTagSelect = function ( tagItem ) {
 569                 var menuOption = this.menu.getItemFromModel( tagItem.getModel() );
 570
 571                 this.menu.setUserSelecting( true );
 572                 // Parent method
 573                 FilterTagMultiselectWidget.parent.prototype.onTagSelect.call( this, tagItem );
 574
 575                 // Switch view
 576                 this.controller.resetSearchForView( tagItem.getView() );
 577
 578                 this.selectTag( tagItem );
 579                 this.scrollToTop( menuOption.$element );
 580
 581                 this.menu.setUserSelecting( false );
 582         };
 583
 584         /**
 585          * Select a tag by reference. This is what OO.ui.SelectWidget is doing.
 586          * If no items are given, reset selection from all.
 587          *
 588          * @param {mw.rcfilters.ui.FilterTagItemWidget} [item] Tag to select,
 589          *  omit to deselect all
 590          */
 591         FilterTagMultiselectWidget.prototype.selectTag = function ( item ) {
 592                 var i, len, selected;
 593
 594                 for ( i = 0, len = this.items.length; i < len; i++ ) {
 595                         selected = this.items[ i ] === item;
 596                         if ( this.items[ i ].isSelected() !== selected ) {
 597                                 this.items[ i ].toggleSelected( selected );
 598                         }
 599                 }
 600         };
 601         /**
 602          * @inheritdoc
 603          */
 604         FilterTagMultiselectWidget.prototype.onTagRemove = function ( tagItem ) {
 605                 // Parent method
 606                 FilterTagMultiselectWidget.parent.prototype.onTagRemove.call( this, tagItem );
 607
 608                 this.controller.clearFilter( tagItem.getName() );
 609
 610                 tagItem.destroy();
 611         };
 612
 613         /**
 614          * Respond to click event on the reset button
 615          */
 616         FilterTagMultiselectWidget.prototype.onResetButtonClick = function () {
 617                 if ( this.model.areVisibleFiltersEmpty() ) {
 618                         // Reset to default filters
 619                         this.controller.resetToDefaults();
 620                 } else {
 621                         // Reset to have no filters
 622                         this.controller.emptyFilters();
 623                 }
 624         };
 625
 626         /**
 627          * Respond to hide/show button click
 628          */
 629         FilterTagMultiselectWidget.prototype.onHideShowButtonClick = function () {
 630                 this.toggleCollapsed();
 631         };
 632
 633         /**
 634          * Toggle the collapsed state of the filters widget
 635          *
 636          * @param {boolean} isCollapsed Widget is collapsed
 637          */
 638         FilterTagMultiselectWidget.prototype.toggleCollapsed = function ( isCollapsed ) {
 639                 isCollapsed = isCollapsed === undefined ? !this.collapsed : !!isCollapsed;
 640
 641                 this.collapsed = isCollapsed;
 642
 643                 if ( isCollapsed ) {
 644                         // If we are collapsing, close the menu, in case it was open
 645                         // We should make sure the menu closes before the rest of the elements
 646                         // are hidden, otherwise there is an unknown error in jQuery as ooui
 647                         // sets and unsets properties on the input (which is hidden at that point)
 648                         this.menu.toggle( false );
 649                 }
 650                 this.input.setDisabled( isCollapsed );
 651                 this.hideShowButton.setLabel( mw.msg(
 652                         isCollapsed ? 'rcfilters-activefilters-show' : 'rcfilters-activefilters-hide'
 653                 ) );
 654                 this.hideShowButton.setTitle( mw.msg(
 655                         isCollapsed ? 'rcfilters-activefilters-show-tooltip' : 'rcfilters-activefilters-hide-tooltip'
 656                 ) );
 657
 658                 // Toggle the wrapper class, so we have min height values correctly throughout
 659                 this.$wrapper.toggleClass( 'mw-rcfilters-collapsed', isCollapsed );
 660
 661                 // Save the state
 662                 this.controller.updateCollapsedState( isCollapsed );
 663         };
 664
 665         /**
 666          * Reevaluate the restore state for the widget between setting to defaults and clearing all filters
 667          */
 668         FilterTagMultiselectWidget.prototype.reevaluateResetRestoreState = function () {
 669                 var defaultsAreEmpty = this.controller.areDefaultsEmpty(),
 670                         currFiltersAreEmpty = this.model.areVisibleFiltersEmpty(),
 671                         hideResetButton = currFiltersAreEmpty && defaultsAreEmpty;
 672
 673                 this.resetButton.setIcon(
 674                         currFiltersAreEmpty ? 'history' : 'trash'
 675                 );
 676
 677                 this.resetButton.setLabel(
 678                         currFiltersAreEmpty ? mw.msg( 'rcfilters-restore-default-filters' ) : ''
 679                 );
 680                 this.resetButton.setTitle(
 681                         currFiltersAreEmpty ? null : mw.msg( 'rcfilters-clear-all-filters' )
 682                 );
 683
 684                 this.resetButton.toggle( !hideResetButton );
 685                 this.emptyFilterMessage.toggle( currFiltersAreEmpty );
 686         };
 687
 688         /**
 689          * @inheritdoc
 690          */
 691         FilterTagMultiselectWidget.prototype.createMenuWidget = function ( menuConfig ) {
 692                 return new MenuSelectWidget(
 693                         this.controller,
 694                         this.model,
 695                         menuConfig
 696                 );
 697         };
 698
 699         /**
 700          * @inheritdoc
 701          */
 702         FilterTagMultiselectWidget.prototype.createTagItemWidget = function ( data ) {
 703                 var filterItem = this.model.getItemByName( data );
 704
 705                 if ( filterItem ) {
 706                         return new FilterTagItemWidget(
 707                                 this.controller,
 708                                 this.model,
 709                                 this.model.getInvertModel(),
 710                                 filterItem,
 711                                 {
 712                                         $overlay: this.$overlay
 713                                 }
 714                         );
 715                 }
 716         };
 717
 718         FilterTagMultiselectWidget.prototype.emphasize = function () {
 719                 if (
 720                         !this.$handle.hasClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' )
 721                 ) {
 722                         this.$handle
 723                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-emphasize' )
 724                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' );
 725
 726                         setTimeout( function () {
 727                                 this.$handle
 728                                         .removeClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-emphasize' );
 729
 730                                 setTimeout( function () {
 731                                         this.$handle
 732                                                 .removeClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' );
 733                                 }.bind( this ), 1000 );
 734                         }.bind( this ), 500 );
 735
 736                 }
 737         };
 738         /**
 739          * Scroll the element to top within its container
 740          *
 741          * @private
 742          * @param {jQuery} $element Element to position
 743          * @param {number} [marginFromTop=0] When scrolling the entire widget to the top, leave this
 744          *  much space (in pixels) above the widget.
 745          * @param {Object} [threshold] Minimum distance from the top of the element to scroll at all
 746          * @param {number} [threshold.min] Minimum distance above the element
 747          * @param {number} [threshold.max] Minimum distance below the element
 748          */
 749         FilterTagMultiselectWidget.prototype.scrollToTop = function ( $element, marginFromTop, threshold ) {
 750                 var container = OO.ui.Element.static.getClosestScrollableContainer( $element[ 0 ], 'y' ),
 751                         pos = OO.ui.Element.static.getRelativePosition( $element, $( container ) ),
 752                         containerScrollTop = $( container ).scrollTop(),
 753                         effectiveScrollTop = $( container ).is( 'body, html' ) ? 0 : containerScrollTop,
 754                         newScrollTop = effectiveScrollTop + pos.top - ( marginFromTop || 0 );
 755
 756                 // Scroll to item
 757                 if (
 758                         threshold === undefined ||
 759                         (
 760                                 (
 761                                         threshold.min === undefined ||
 762                                         newScrollTop - containerScrollTop >= threshold.min
 763                                 ) &&
 764                                 (
 765                                         threshold.max === undefined ||
 766                                         newScrollTop - containerScrollTop <= threshold.max
 767                                 )
 768                         )
 769                 ) {
 770                         $( container ).animate( {
 771                                 scrollTop: newScrollTop
 772                         } );
 773                 }
 774         };
 775
 776         module.exports = FilterTagMultiselectWidget;
 777 }() );