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

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