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                                                 data: 'namespaces',
 151                                                 icon: 'article',
 152                                                 title: mw.msg( 'rcfilters-view-namespaces-tooltip' )
 153                                         } ),
 154                                         new OO.ui.ButtonOptionWidget( {
 155                                                 data: 'tags',
 156                                                 icon: 'tag',
 157                                                 title: mw.msg( 'rcfilters-view-tags-tooltip' )
 158                                         } )
 159                                 ]
 160                         } );
 161
 162                         // Rearrange the UI so the select widget is at the right of the input
 163                         this.$element.append(
 164                                 $( '<div>' )
 165                                         .addClass( 'mw-rcfilters-ui-table' )
 166                                         .append(
 167                                                 $( '<div>' )
 168                                                         .addClass( 'mw-rcfilters-ui-row' )
 169                                                         .append(
 170                                                                 $( '<div>' )
 171                                                                         .addClass( 'mw-rcfilters-ui-cell' )
 172                                                                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-input' )
 173                                                                         .append( this.input.$element ),
 174                                                                 $( '<div>' )
 175                                                                         .addClass( 'mw-rcfilters-ui-cell' )
 176                                                                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-select' )
 177                                                                         .append( this.viewsSelectWidget.$element )
 178                                                         )
 179                                         )
 180                         );
 181
 182                         // Event
 183                         this.viewsSelectWidget.connect( this, { choose: 'onViewsSelectWidgetChoose' } );
 184                 }
 185
 186                 rcFiltersRow.append(
 187                         $( '<div>' )
 188                                 .addClass( 'mw-rcfilters-ui-cell' )
 189                                 .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-reset' )
 190                                 .append( this.resetButton.$element )
 191                 );
 192
 193                 // Build the content
 194                 $contentWrapper.append(
 195                         title.$element,
 196                         this.savedQueryTitle.$element,
 197                         $( '<div>' )
 198                                 .addClass( 'mw-rcfilters-ui-table' )
 199                                 .append(
 200                                         rcFiltersRow
 201                                 )
 202                 );
 203
 204                 // Initialize
 205                 this.$handle.append( $contentWrapper );
 206                 this.emptyFilterMessage.toggle( this.isEmpty() );
 207                 this.savedQueryTitle.toggle( false );
 208
 209                 this.$element
 210                         .addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget' );
 211
 212                 this.reevaluateResetRestoreState();
 213         };
 214
 215         /* Initialization */
 216
 217         OO.inheritClass( mw.rcfilters.ui.FilterTagMultiselectWidget, OO.ui.MenuTagMultiselectWidget );
 218
 219         /* Methods */
 220
 221         /**
 222          * Respond to view select widget choose event
 223          *
 224          * @param {OO.ui.ButtonOptionWidget} buttonOptionWidget Chosen widget
 225          */
 226         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onViewsSelectWidgetChoose = function ( buttonOptionWidget ) {
 227                 this.controller.switchView( buttonOptionWidget.getData() );
 228                 this.viewsSelectWidget.selectItem( null );
 229                 this.focus();
 230         };
 231
 232         /**
 233          * Respond to input change event
 234          *
 235          * @param {string} value Value of the input
 236          */
 237         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onInputChange = function ( value ) {
 238                 var view = this.model.getViewByTrigger( value.substr( 0, 1 ) );
 239
 240                 this.controller.switchView( view );
 241         };
 242         /**
 243          * Respond to query button click
 244          */
 245         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onSaveQueryButtonClick = function () {
 246                 this.getMenu().toggle( false );
 247         };
 248
 249         /**
 250          * Respond to save query item change. Mainly this is done to update the label in case
 251          * a query item has been edited
 252          *
 253          * @param {mw.rcfilters.dm.SavedQueryItemModel} item Saved query item
 254          */
 255         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onSavedQueriesItemUpdate = function ( item ) {
 256                 if ( this.matchingQuery === item ) {
 257                         // This means we just edited the item that is currently matched
 258                         this.savedQueryTitle.setLabel( item.getLabel() );
 259                 }
 260         };
 261
 262         /**
 263          * Respond to menu toggle
 264          *
 265          * @param {boolean} isVisible Menu is visible
 266          */
 267         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onMenuToggle = function ( isVisible ) {
 268                 // Parent
 269                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onMenuToggle.call( this );
 270
 271                 if ( isVisible ) {
 272                         mw.hook( 'RcFilters.popup.open' ).fire();
 273
 274                         if ( !this.getMenu().getSelectedItem() ) {
 275                                 // If there are no selected items, scroll menu to top
 276                                 // This has to be in a setTimeout so the menu has time
 277                                 // to be positioned and fixed
 278                                 setTimeout( function () { this.getMenu().scrollToTop(); }.bind( this ), 0 );
 279                         }
 280                 } else {
 281                         // Clear selection
 282                         this.selectTag( null );
 283
 284                         // Clear input if the only thing in the input is the prefix
 285                         if (
 286                                 this.input.getValue() === this.model.getViewTrigger( this.model.getCurrentView() )
 287                         ) {
 288                                 // Clear the input
 289                                 this.input.setValue( '' );
 290                         }
 291                 }
 292
 293                 this.input.setIcon( isVisible ? 'search' : 'menu' );
 294         };
 295
 296         /**
 297          * @inheritdoc
 298          */
 299         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onInputFocus = function () {
 300                 // Parent
 301                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onInputFocus.call( this );
 302
 303                 // Scroll to top
 304                 this.scrollToTop( this.$element );
 305         };
 306
 307         /**
 308          * @inheritdoc
 309          */
 310         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.doInputEscape = function () {
 311                 // Parent
 312                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.doInputEscape.call( this );
 313
 314                 // Blur the input
 315                 this.input.$input.blur();
 316         };
 317
 318         /**
 319          * @inheridoc
 320          */
 321         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onChangeTags = function () {
 322                 // Parent method
 323                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onChangeTags.call( this );
 324
 325                 this.emptyFilterMessage.toggle( this.isEmpty() );
 326         };
 327
 328         /**
 329          * Respond to model initialize event
 330          */
 331         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onModelInitialize = function () {
 332                 this.setSavedQueryVisibility();
 333         };
 334
 335         /**
 336          * Respond to model update event
 337          */
 338         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onModelUpdate = function () {
 339                 this.updateElementsForView();
 340         };
 341
 342         /**
 343          * Update the elements in the widget to the current view
 344          */
 345         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.updateElementsForView = function () {
 346                 var view = this.model.getCurrentView(),
 347                         inputValue = this.input.getValue(),
 348                         inputView = this.model.getViewByTrigger( inputValue.substr( 0, 1 ) );
 349
 350                 if ( inputView !== 'default' ) {
 351                         // We have a prefix already, remove it
 352                         inputValue = inputValue.substr( 1 );
 353                 }
 354
 355                 if ( inputView !== view ) {
 356                         // Add the correct prefix
 357                         inputValue = this.model.getViewTrigger( view ) + inputValue;
 358                 }
 359
 360                 // Update input
 361                 this.input.setValue( inputValue );
 362         };
 363
 364         /**
 365          * Set the visibility of the saved query button
 366          */
 367         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.setSavedQueryVisibility = function () {
 368                 if ( this.areSavedQueriesEnabled ) {
 369                         this.matchingQuery = this.controller.findQueryMatchingCurrentState();
 370
 371                         this.savedQueryTitle.setLabel(
 372                                 this.matchingQuery ? this.matchingQuery.getLabel() : ''
 373                         );
 374                         this.savedQueryTitle.toggle( !!this.matchingQuery );
 375                         this.saveQueryButton.toggle(
 376                                 !this.isEmpty() &&
 377                                 !this.matchingQuery
 378                         );
 379                 }
 380         };
 381
 382         /**
 383          * Respond to model itemUpdate event
 384          *
 385          * @param {mw.rcfilters.dm.FilterItem} item Filter item model
 386          */
 387         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onModelItemUpdate = function ( item ) {
 388                 if ( item.getGroupModel().isHidden() ) {
 389                         return;
 390                 }
 391
 392                 if (
 393                         item.isSelected() ||
 394                         (
 395                                 this.model.isHighlightEnabled() &&
 396                                 item.isHighlightSupported() &&
 397                                 item.getHighlightColor()
 398                         )
 399                 ) {
 400                         this.addTag( item.getName(), item.getLabel() );
 401                 } else {
 402                         this.removeTagByData( item.getName() );
 403                 }
 404
 405                 this.setSavedQueryVisibility();
 406
 407                 // Re-evaluate reset state
 408                 this.reevaluateResetRestoreState();
 409         };
 410
 411         /**
 412          * @inheritdoc
 413          */
 414         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.isAllowedData = function ( data ) {
 415                 return (
 416                         this.model.getItemByName( data ) &&
 417                         !this.isDuplicateData( data )
 418                 );
 419         };
 420
 421         /**
 422          * @inheritdoc
 423          */
 424         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onMenuChoose = function ( item ) {
 425                 this.controller.toggleFilterSelect( item.model.getName() );
 426
 427                 // Select the tag if it exists, or reset selection otherwise
 428                 this.selectTag( this.getItemFromData( item.model.getName() ) );
 429
 430                 this.focus();
 431         };
 432
 433         /**
 434          * Respond to highlightChange event
 435          *
 436          * @param {boolean} isHighlightEnabled Highlight is enabled
 437          */
 438         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onModelHighlightChange = function ( isHighlightEnabled ) {
 439                 var highlightedItems = this.model.getHighlightedItems();
 440
 441                 if ( isHighlightEnabled ) {
 442                         // Add capsule widgets
 443                         highlightedItems.forEach( function ( filterItem ) {
 444                                 this.addTag( filterItem.getName(), filterItem.getLabel() );
 445                         }.bind( this ) );
 446                 } else {
 447                         // Remove capsule widgets if they're not selected
 448                         highlightedItems.forEach( function ( filterItem ) {
 449                                 if ( !filterItem.isSelected() ) {
 450                                         this.removeTagByData( filterItem.getName() );
 451                                 }
 452                         }.bind( this ) );
 453                 }
 454         };
 455
 456         /**
 457          * @inheritdoc
 458          */
 459         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onTagSelect = function ( tagItem ) {
 460                 var widget = this,
 461                         menuOption = this.menu.getItemFromModel( tagItem.getModel() ),
 462                         oldInputValue = this.input.getValue();
 463
 464                 this.menu.setUserSelecting( true );
 465
 466                 // Reset input
 467                 this.input.setValue( '' );
 468
 469                 // Switch view
 470                 this.controller.switchView( tagItem.getView() );
 471
 472                 // Parent method
 473                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onTagSelect.call( this, tagItem );
 474
 475                 this.menu.selectItem( menuOption );
 476                 this.selectTag( tagItem );
 477
 478                 // Scroll to the item
 479                 if ( this.model.removeViewTriggers( oldInputValue ) ) {
 480                         // We're binding a 'once' to the itemVisibilityChange event
 481                         // so this happens when the menu is ready after the items
 482                         // are visible again, in case this is done right after the
 483                         // user filtered the results
 484                         this.getMenu().once(
 485                                 'itemVisibilityChange',
 486                                 function () {
 487                                         widget.scrollToTop( menuOption.$element );
 488                                         widget.menu.setUserSelecting( false );
 489                                 }
 490                         );
 491                 } else {
 492                         this.scrollToTop( menuOption.$element );
 493                         this.menu.setUserSelecting( false );
 494                 }
 495
 496         };
 497
 498         /**
 499          * Select a tag by reference. This is what OO.ui.SelectWidget is doing.
 500          * If no items are given, reset selection from all.
 501          *
 502          * @param {mw.rcfilters.ui.FilterTagItemWidget} [item] Tag to select,
 503          *  omit to deselect all
 504          */
 505         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.selectTag = function ( item ) {
 506                 var i, len, selected;
 507
 508                 for ( i = 0, len = this.items.length; i < len; i++ ) {
 509                         selected = this.items[ i ] === item;
 510                         if ( this.items[ i ].isSelected() !== selected ) {
 511                                 this.items[ i ].toggleSelected( selected );
 512                         }
 513                 }
 514         };
 515         /**
 516          * @inheritdoc
 517          */
 518         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onTagRemove = function ( tagItem ) {
 519                 // Parent method
 520                 mw.rcfilters.ui.FilterTagMultiselectWidget.parent.prototype.onTagRemove.call( this, tagItem );
 521
 522                 this.controller.clearFilter( tagItem.getName() );
 523
 524                 tagItem.destroy();
 525         };
 526
 527         /**
 528          * Respond to click event on the reset button
 529          */
 530         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.onResetButtonClick = function () {
 531                 if ( this.model.areCurrentFiltersEmpty() ) {
 532                         // Reset to default filters
 533                         this.controller.resetToDefaults();
 534                 } else {
 535                         // Reset to have no filters
 536                         this.controller.emptyFilters();
 537                 }
 538         };
 539
 540         /**
 541          * Reevaluate the restore state for the widget between setting to defaults and clearing all filters
 542          */
 543         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.reevaluateResetRestoreState = function () {
 544                 var defaultsAreEmpty = this.model.areDefaultFiltersEmpty(),
 545                         currFiltersAreEmpty = this.model.areCurrentFiltersEmpty(),
 546                         hideResetButton = currFiltersAreEmpty && defaultsAreEmpty;
 547
 548                 this.resetButton.setIcon(
 549                         currFiltersAreEmpty ? 'history' : 'trash'
 550                 );
 551
 552                 this.resetButton.setLabel(
 553                         currFiltersAreEmpty ? mw.msg( 'rcfilters-restore-default-filters' ) : ''
 554                 );
 555                 this.resetButton.setTitle(
 556                         currFiltersAreEmpty ? null : mw.msg( 'rcfilters-clear-all-filters' )
 557                 );
 558
 559                 this.resetButton.toggle( !hideResetButton );
 560                 this.emptyFilterMessage.toggle( currFiltersAreEmpty );
 561         };
 562
 563         /**
 564          * @inheritdoc
 565          */
 566         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.createMenuWidget = function ( menuConfig ) {
 567                 return new mw.rcfilters.ui.MenuSelectWidget(
 568                         this.controller,
 569                         this.model,
 570                         $.extend( {
 571                                 filterFromInput: true
 572                         }, menuConfig )
 573                 );
 574         };
 575
 576         /**
 577          * @inheritdoc
 578          */
 579         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.createTagItemWidget = function ( data ) {
 580                 var filterItem = this.model.getItemByName( data );
 581
 582                 if ( filterItem ) {
 583                         return new mw.rcfilters.ui.FilterTagItemWidget(
 584                                 this.controller,
 585                                 filterItem,
 586                                 {
 587                                         $overlay: this.$overlay
 588                                 }
 589                         );
 590                 }
 591         };
 592
 593         /**
 594          * Scroll the element to top within its container
 595          *
 596          * @private
 597          * @param {jQuery} $element Element to position
 598          * @param {number} [marginFromTop] When scrolling the entire widget to the top, leave this
 599          *  much space (in pixels) above the widget.
 600          */
 601         mw.rcfilters.ui.FilterTagMultiselectWidget.prototype.scrollToTop = function ( $element, marginFromTop ) {
 602                 var container = OO.ui.Element.static.getClosestScrollableContainer( $element[ 0 ], 'y' ),
 603                         pos = OO.ui.Element.static.getRelativePosition( $element, $( container ) ),
 604                         containerScrollTop = $( container ).is( 'body, html' ) ? 0 : $( container ).scrollTop();
 605
 606                 // Scroll to item
 607                 $( container ).animate( {
 608                         scrollTop: containerScrollTop + pos.top - ( marginFromTop || 0 )
 609                 } );
 610         };
 611 }( mediaWiki ) );