FilterTagMultiselectWidget.js
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FilterTagMultiselectWidget.js
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	const ViewSwitchWidget = require( './ViewSwitchWidget.js' ),
	SaveFiltersPopupButtonWidget = require( './SaveFiltersPopupButtonWidget.js' ),
	MenuSelectWidget = require( './MenuSelectWidget.js' ),
	FilterTagItemWidget = require( './FilterTagItemWidget.js' );

	/**
	* List displaying all filter groups.
	*
	* @class mw.rcfilters.ui.FilterTagMultiselectWidget
	* @ignore
	* @extends OO.ui.MenuTagMultiselectWidget
	* @mixes OO.ui.mixin.PendingElement
	*
	* @param {mw.rcfilters.Controller} controller Controller
	* @param {mw.rcfilters.dm.FiltersViewModel} model View model
	* @param {mw.rcfilters.dm.SavedQueriesModel} savedQueriesModel Saved queries model
	* @param {Object} config Configuration object
	* @param {jQuery} [config.$overlay] A jQuery object serving as overlay for popups
	* @param {jQuery} [config.$wrapper] A jQuery object for the wrapper of the general
	* system. If not given, falls back to this widget's $element
	* @param {boolean} [config.collapsed] Filter area is collapsed
	*/
	const FilterTagMultiselectWidget = function MwRcfiltersUiFilterTagMultiselectWidget( controller, model, savedQueriesModel, config ) {
	const title = new OO.ui.LabelWidget( {
	label: mw.msg( 'rcfilters-activefilters' ),
	classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-content-title' ]
	} ),
	$contentWrapper = $( '<div>' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper' );

	config = config \|\| {};

	this.controller = controller;
	this.model = model;
	this.queriesModel = savedQueriesModel;
	this.$overlay = config.$overlay \|\| this.$element;
	this.$wrapper = config.$wrapper \|\| this.$element;
	this.matchingQuery = null;
	this.currentView = this.model.getCurrentView();
	this.collapsed = false;
	this.isMobile = config.isMobile;

	// Has to be before the parent constructor, because the parent constructor may call setValue()
	// which causes the onChangeTags handler to run (T245073)
	this.emptyFilterMessage = new OO.ui.LabelWidget( {
	label: mw.msg( 'rcfilters-empty-filter' ),
	classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-emptyFilters' ]
	} );

	// Parent
	FilterTagMultiselectWidget.super.call( this, $.extend( true, {
	label: mw.msg( 'rcfilters-filterlist-title' ),
	placeholder: mw.msg( 'rcfilters-empty-filter' ),
	inputPosition: 'outline',
	allowArbitrary: false,
	allowDisplayInvalidTags: false,
	allowReordering: false,
	$overlay: this.$overlay,
	menu: {
	// Our filtering is done through the model
	filterFromInput: false,
	hideWhenOutOfView: false,
	hideOnChoose: false,
	// Only set width and footers for desktop
	isMobile: this.isMobile,
	width: 650,
	footers: [
	{
	name: 'viewSelect',
	sticky: false,
	// View select menu, appears on default view only
	$element: $( '<div>' )
	.append( new ViewSwitchWidget( this.controller, this.model ).$element ),
	views: [ 'default' ]
	}
	]
	},
	/**
	* In the presence of an onscreen keyboard (i.e. isMobile) the filter input should act as a button
	* rather than a text input. Mobile screens are too small to accommodate both an
	* onscreen keyboard and a popup-menu, so readyOnly is set to disable the keyboard.
	* A different icon and shorter message is used for mobile as well. (See T224655 for details).
	*
	* @ignore
	*/
	input: {
	icon: this.isMobile ? 'funnel' : 'menu',
	placeholder: this.isMobile ? mw.msg( 'rcfilters-search-placeholder-mobile' ) : mw.msg( 'rcfilters-search-placeholder' ),
	readOnly: !!this.isMobile,
	classes: [ 'oo-ui-tagMultiselectWidget-input' ]
	}
	}, config ) );

	this.input.$input.attr( 'aria-label', mw.msg( 'rcfilters-search-placeholder' ) );

	this.savedQueryTitle = new OO.ui.LabelWidget( {
	label: '',
	classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-content-savedQueryTitle' ]
	} );

	this.resetButton = new OO.ui.ButtonWidget( {
	framed: false,
	classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-resetButton' ]
	} );

	this.hideShowButton = new OO.ui.ButtonWidget( {
	framed: false,
	flags: [ 'progressive' ],
	classes: [ 'mw-rcfilters-ui-filterTagMultiselectWidget-hideshowButton' ]
	} );
	this.toggleCollapsed( !!config.collapsed );

	if ( !mw.user.isAnon() ) {
	this.saveQueryButton = new SaveFiltersPopupButtonWidget(
	this.controller,
	this.queriesModel,
	{
	$overlay: this.$overlay
	}
	);

	this.saveQueryButton.$element.on( 'mousedown', ( e ) => {
	e.stopPropagation();
	} );

	this.saveQueryButton.connect( this, {
	click: 'onSaveQueryButtonClick',
	saveCurrent: 'setSavedQueryVisibility'
	} );
	this.queriesModel.connect( this, {
	itemUpdate: 'onSavedQueriesItemUpdate',
	initialize: 'onSavedQueriesInitialize',
	default: 'reevaluateResetRestoreState'
	} );
	}

	this.$content.append( this.emptyFilterMessage.$element );

	// Events
	this.resetButton.connect( this, { click: 'onResetButtonClick' } );
	this.hideShowButton.connect( this, { click: 'onHideShowButtonClick' } );
	// Stop propagation for mousedown, so that the widget doesn't
	// trigger the focus on the input and scrolls up when we click the reset button
	this.resetButton.$element.on( 'mousedown', ( e ) => {
	e.stopPropagation();
	} );
	this.hideShowButton.$element.on( 'mousedown', ( e ) => {
	e.stopPropagation();
	} );
	this.model.connect( this, {
	initialize: 'onModelInitialize',
	update: 'onModelUpdate',
	searchChange: this.isMobile ? function () {} : 'onModelSearchChange',
	itemUpdate: 'onModelItemUpdate',
	highlightChange: 'onModelHighlightChange'
	} );

	if ( !this.isMobile ) {
	this.input.connect( this, { change: 'onInputChange' } );
	}

	// The filter list and button should appear side by side regardless of how
	// wide the button is; the button also changes its width depending
	// on language and its state, so the safest way to present both side
	// by side is with a table layout
	const $rcFiltersRow = $( '<div>' )
	.addClass( 'mw-rcfilters-ui-row' )
	.append(
	this.$content
	.addClass( 'mw-rcfilters-ui-cell' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-filters' )
	);

	if ( !mw.user.isAnon() ) {
	$rcFiltersRow.append(
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-cell' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-save' )
	.append( this.saveQueryButton.$element )
	);
	}

	// Add a selector at the right of the input
	this.viewsSelectWidget = this.createViewsSelectWidget();

	// change the layout of the viewsSelectWidget
	this.restructureViewsSelectWidget();

	// Event
	this.viewsSelectWidget.aggregate( { click: 'buttonClick' } );
	this.viewsSelectWidget.connect( this, { buttonClick: 'onViewsSelectWidgetButtonClick' } );

	$rcFiltersRow.append(
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-cell' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-cell-reset' )
	.append( this.resetButton.$element )
	);

	// Build the content
	$contentWrapper.append(
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-top' )
	.append(
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-top-title' )
	.append( title.$element ),
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-top-queryName' )
	.append( this.savedQueryTitle.$element ),
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-top-hideshow' )
	.append(
	this.hideShowButton.$element
	)
	),
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-table' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-wrapper-filters' )
	.append( $rcFiltersRow )
	);

	// Initialize
	this.$handle.append( $contentWrapper );
	this.emptyFilterMessage.toggle( this.isEmpty() );
	this.savedQueryTitle.toggle( false );

	this.$element
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget' );

	if ( this.isMobile ) {
	this.$element
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-mobile' );
	}

	this.reevaluateResetRestoreState();
	};

	/* Initialization */

	OO.inheritClass( FilterTagMultiselectWidget, OO.ui.MenuTagMultiselectWidget );

	/* Methods */

	/**
	* Create a OOUI ButtonGroupWidget. The buttons are framed and have additional CSS
	* classes applied on mobile.
	*
	* @return {OO.ui.ButtonGroupWidget}
	*/
	FilterTagMultiselectWidget.prototype.createViewsSelectWidget = function () {
	const viewsSelectWidget = new OO.ui.ButtonGroupWidget( {
	classes: this.isMobile ?
	[
	'mw-rcfilters-ui-table',
	'mw-rcfilters-ui-filterTagMultiselectWidget-mobile-view'
	] :
	[
	'mw-rcfilters-ui-filterTagMultiselectWidget-views-select-widget'
	],
	items: [
	new OO.ui.ButtonWidget( {
	framed: !!this.isMobile,
	data: 'namespaces',
	icon: 'article',
	label: mw.msg( 'namespaces' ),
	title: mw.msg( 'rcfilters-view-namespaces-tooltip' ),
	classes: this.isMobile ? [ 'mw-rcfilters-ui-cell' ] : []
	} ),
	new OO.ui.ButtonWidget( {
	framed: !!this.isMobile,
	data: 'tags',
	icon: 'tag',
	label: mw.msg( 'tags-title' ),
	title: mw.msg( 'rcfilters-view-tags-tooltip' ),
	classes: this.isMobile ? [ 'mw-rcfilters-ui-cell' ] : []
	} )
	]
	} );

	viewsSelectWidget.items.forEach( ( item ) => {
	item.$button.attr( 'aria-label', item.title );
	} );

	return viewsSelectWidget;
	};

	/**
	* Rearrange the DOM structure of the viewsSelectWiget so that on the namespace & tags buttons
	* are at the right of the input on desktop, and below the input on mobile.
	*/
	FilterTagMultiselectWidget.prototype.restructureViewsSelectWidget = function () {
	if ( this.isMobile ) {
	// On mobile, append the search input and the extra buttons below the search input.
	this.$element.append(
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-input' )
	.append( this.input.$element )
	.append( this.viewsSelectWidget.$element )
	);
	} else {
	// On desktop, rearrange the UI so the select widget is at the right of the input
	this.$element.append(
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-table' )
	.append(
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-row' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views' )
	.append(
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-cell' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-input' )
	.append( this.input.$element ),
	$( '<div>' )
	.addClass( 'mw-rcfilters-ui-cell' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-views-select' )
	.append( this.viewsSelectWidget.$element )
	)
	)
	);
	}
	};

	/**
	* Respond to button click event
	*
	* @param {OO.ui.ButtonWidget} buttonWidget Clicked widget
	*/
	FilterTagMultiselectWidget.prototype.onViewsSelectWidgetButtonClick = function ( buttonWidget ) {
	this.controller.switchView( buttonWidget.getData() );
	this.focus();
	};

	/**
	* Respond to model search change event
	*
	* @param {string} value Search value
	*/
	FilterTagMultiselectWidget.prototype.onModelSearchChange = function ( value ) {
	this.input.setValue( value );
	};

	/**
	* Respond to input change event
	*
	* @param {string} value Value of the input
	*/
	FilterTagMultiselectWidget.prototype.onInputChange = function ( value ) {
	this.controller.setSearch( value );
	};

	/**
	* Respond to query button click
	*/
	FilterTagMultiselectWidget.prototype.onSaveQueryButtonClick = function () {
	this.getMenu().toggle( false );
	};

	/**
	* Respond to save query model initialization
	*/
	FilterTagMultiselectWidget.prototype.onSavedQueriesInitialize = function () {
	this.setSavedQueryVisibility();
	};

	/**
	* Respond to save query item change. Mainly this is done to update the label in case
	* a query item has been edited
	*
	* @param {mw.rcfilters.dm.SavedQueryItemModel} item Saved query item
	*/
	FilterTagMultiselectWidget.prototype.onSavedQueriesItemUpdate = function ( item ) {
	if ( this.matchingQuery === item ) {
	// This means we just edited the item that is currently matched
	this.savedQueryTitle.setLabel( item.getLabel() );
	}
	};

	/**
	* Respond to menu toggle
	*
	* @param {boolean} isVisible Menu is visible
	*/
	FilterTagMultiselectWidget.prototype.onMenuToggle = function ( isVisible ) {

	const scrollToElement = this.isMobile ? this.input.$input : this.$element;

	// Parent
	FilterTagMultiselectWidget.super.prototype.onMenuToggle.call( this );

	if ( isVisible ) {
	if ( !this.isMobile ) {
	this.focus();
	}

	/**
	* Fires when the RCFilters tag multi selector menu is toggled.
	*
	* @event ~'RcFilters.popup.open'
	* @memberof Hooks
	*/
	mw.hook( 'RcFilters.popup.open' ).fire();

	if ( !this.getMenu().findSelectedItem() ) {
	// If there are no selected items, scroll menu to top
	// This has to be in a setTimeout so the menu has time
	// to be positioned and fixed
	setTimeout(
	() => {
	this.getMenu().scrollToTop();
	}
	);
	}

	// Only scroll to top of the viewport if:
	// - The widget is more than 20px from the top
	// - The widget is not above the top of the viewport (do not scroll downwards)
	// (This isn't represented because >20 is, anyways and always, bigger than 0)
	this.scrollToTop( scrollToElement, 0, { min: 20, max: Infinity } );

	} else {
	// Clear selection
	this.selectTag( null );

	// Clear the search
	this.controller.setSearch( '' );

	this.blur();
	}

	if ( this.isMobile ) {
	this.input.setIcon( isVisible ? 'close' : 'funnel' );
	} else {
	this.input.setIcon( isVisible ? 'search' : 'menu' );
	}
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.onInputFocus = function () {

	// treat the input as a menu toggle rather than a text field on mobile
	if ( this.isMobile ) {
	this.input.$input.trigger( 'blur' );
	this.getMenu().toggle();
	} else {
	// Parent
	FilterTagMultiselectWidget.super.prototype.onInputFocus.call( this );
	}
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.doInputEscape = function () {
	// Parent
	FilterTagMultiselectWidget.super.prototype.doInputEscape.call( this );

	// Blur the input
	this.input.$input.trigger( 'blur' );
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.onMouseDown = function ( e ) {
	if ( !this.collapsed && !this.isDisabled() && e.which === OO.ui.MouseButtons.LEFT ) {
	this.menu.toggle();

	return false;
	}
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.onChangeTags = function () {
	// If initialized, call parent method.
	if ( this.controller.isInitialized() ) {
	FilterTagMultiselectWidget.super.prototype.onChangeTags.call( this );
	}

	this.emptyFilterMessage.toggle( this.isEmpty() );
	};

	/**
	* Respond to model initialize event
	*/
	FilterTagMultiselectWidget.prototype.onModelInitialize = function () {
	this.setSavedQueryVisibility();
	};

	/**
	* Respond to model update event
	*/
	FilterTagMultiselectWidget.prototype.onModelUpdate = function () {
	this.updateElementsForView();
	};

	/**
	* Update the elements in the widget to the current view
	*/
	FilterTagMultiselectWidget.prototype.updateElementsForView = function () {
	let inputValue = this.input.getValue().trim();
	const view = this.model.getCurrentView(),
	inputView = this.model.getViewByTrigger( inputValue.slice( 0, 1 ) );

	if ( inputView !== 'default' ) {
	// We have a prefix already, remove it
	inputValue = inputValue.slice( 1 );
	}

	if ( inputView !== view ) {
	// Add the correct prefix
	inputValue = this.model.getViewTrigger( view ) + inputValue;
	}

	// Update input
	this.input.setValue( inputValue );

	if ( this.currentView !== view ) {
	this.scrollToTop( this.$element );
	this.currentView = view;
	}
	};

	/**
	* Set the visibility of the saved query button
	*/
	FilterTagMultiselectWidget.prototype.setSavedQueryVisibility = function () {
	if ( mw.user.isAnon() ) {
	return;
	}

	this.matchingQuery = this.controller.findQueryMatchingCurrentState();

	this.savedQueryTitle.setLabel(
	this.matchingQuery ? this.matchingQuery.getLabel() : ''
	);
	this.savedQueryTitle.toggle( !!this.matchingQuery );
	this.saveQueryButton.setDisabled( !!this.matchingQuery );
	this.saveQueryButton.setTitle( !this.matchingQuery ?
	mw.msg( 'rcfilters-savedqueries-add-new-title' ) :
	mw.msg( 'rcfilters-savedqueries-already-saved' ) );

	if ( this.matchingQuery ) {
	this.emphasize();
	}
	};

	/**
	* Respond to model itemUpdate event
	* fixme: when a new state is applied to the model this function is called 60+ times in a row
	*
	* @param {mw.rcfilters.dm.FilterItem} item Filter item model
	*/
	FilterTagMultiselectWidget.prototype.onModelItemUpdate = function ( item ) {
	if ( !item.getGroupModel().isHidden() ) {
	if (
	item.isSelected() \|\|
	(
	this.model.isHighlightEnabled() &&
	item.getHighlightColor()
	)
	) {
	this.addTag( item.getName(), item.getLabel() );
	} else {
	// Only attempt to remove the tag if we can find an item for it (T198140, T198231)
	if ( this.findItemFromData( item.getName() ) !== null ) {
	this.removeTagByData( item.getName() );
	}
	}
	}

	this.setSavedQueryVisibility();

	// Re-evaluate reset state
	this.reevaluateResetRestoreState();
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.isAllowedData = function ( data ) {
	return (
	this.model.getItemByName( data ) &&
	!this.isDuplicateData( data )
	);
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.onMenuChoose = function ( item ) {
	this.controller.toggleFilterSelect( item.model.getName() );

	// Select the tag if it exists, or reset selection otherwise
	this.selectTag( this.findItemFromData( item.model.getName() ) );

	if ( !this.isMobile ) {
	this.focus();
	}

	};

	/**
	* Respond to highlightChange event
	*
	* @param {boolean} isHighlightEnabled Highlight is enabled
	*/
	FilterTagMultiselectWidget.prototype.onModelHighlightChange = function ( isHighlightEnabled ) {
	const highlightedItems = this.model.getHighlightedItems();

	if ( isHighlightEnabled ) {
	// Add capsule widgets
	highlightedItems.forEach( ( filterItem ) => {
	this.addTag( filterItem.getName(), filterItem.getLabel() );
	} );
	} else {
	// Remove capsule widgets if they're not selected
	highlightedItems.forEach( ( filterItem ) => {
	if ( !filterItem.isSelected() ) {
	// Only attempt to remove the tag if we can find an item for it (T198140, T198231)
	if ( this.findItemFromData( filterItem.getName() ) !== null ) {
	this.removeTagByData( filterItem.getName() );
	}
	}
	} );
	}

	this.setSavedQueryVisibility();
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.onTagSelect = function ( tagItem ) {
	const menuOption = this.menu.getItemFromModel( tagItem.getModel() );

	this.menu.setUserSelecting( true );
	// Parent method
	FilterTagMultiselectWidget.super.prototype.onTagSelect.call( this, tagItem );

	// Switch view
	this.controller.resetSearchForView( tagItem.getView() );

	this.selectTag( tagItem );
	this.scrollToTop( menuOption.$element );

	this.menu.setUserSelecting( false );
	};

	/**
	* Select a tag by reference. This is what OO.ui.SelectWidget is doing.
	* If no items are given, reset selection from all.
	*
	* @param {mw.rcfilters.ui.FilterTagItemWidget} [item] Tag to select,
	* omit to deselect all
	*/
	FilterTagMultiselectWidget.prototype.selectTag = function ( item ) {
	let i, len, selected;

	for ( i = 0, len = this.items.length; i < len; i++ ) {
	selected = this.items[ i ] === item;
	if ( this.items[ i ].isSelected() !== selected ) {
	this.items[ i ].toggleSelected( selected );
	}
	}
	};
	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.onTagRemove = function ( tagItem ) {
	// Parent method
	FilterTagMultiselectWidget.super.prototype.onTagRemove.call( this, tagItem );

	this.controller.clearFilter( tagItem.getName() );

	tagItem.destroy();
	};

	/**
	* Respond to click event on the reset button
	*/
	FilterTagMultiselectWidget.prototype.onResetButtonClick = function () {
	if ( this.model.areVisibleFiltersEmpty() ) {
	// Reset to default filters
	this.controller.resetToDefaults();
	} else {
	// Reset to have no filters
	this.controller.emptyFilters();
	}
	};

	/**
	* Respond to hide/show button click
	*/
	FilterTagMultiselectWidget.prototype.onHideShowButtonClick = function () {
	this.toggleCollapsed();
	};

	/**
	* Toggle the collapsed state of the filters widget
	*
	* @param {boolean} isCollapsed Widget is collapsed
	*/
	FilterTagMultiselectWidget.prototype.toggleCollapsed = function ( isCollapsed ) {
	isCollapsed = isCollapsed === undefined ? !this.collapsed : !!isCollapsed;

	this.collapsed = isCollapsed;

	if ( isCollapsed ) {
	// If we are collapsing, close the menu, in case it was open
	// We should make sure the menu closes before the rest of the elements
	// are hidden, otherwise there is an unknown error in jQuery as ooui
	// sets and unsets properties on the input (which is hidden at that point)
	this.menu.toggle( false );
	}
	this.input.setDisabled( isCollapsed );
	this.hideShowButton.setLabel( mw.msg(
	isCollapsed ? 'rcfilters-activefilters-show' : 'rcfilters-activefilters-hide'
	) );
	this.hideShowButton.setTitle( mw.msg(
	isCollapsed ? 'rcfilters-activefilters-show-tooltip' : 'rcfilters-activefilters-hide-tooltip'
	) );

	// Toggle the wrapper class, so we have min height values correctly throughout
	this.$wrapper.toggleClass( 'mw-rcfilters-collapsed', isCollapsed );

	// Save the state
	this.controller.updateCollapsedState( isCollapsed );
	};

	/**
	* Reevaluate the restore state for the widget between setting to defaults and clearing all filters
	*/
	FilterTagMultiselectWidget.prototype.reevaluateResetRestoreState = function () {
	const defaultsAreEmpty = this.controller.areDefaultsEmpty(),
	currFiltersAreEmpty = this.model.areVisibleFiltersEmpty(),
	hideResetButton = currFiltersAreEmpty && defaultsAreEmpty;

	this.resetButton.setIcon(
	currFiltersAreEmpty ? 'history' : 'trash'
	);

	this.resetButton.setLabel(
	currFiltersAreEmpty ? mw.msg( 'rcfilters-restore-default-filters' ) : ''
	);
	this.resetButton.setTitle(
	currFiltersAreEmpty ? null : mw.msg( 'rcfilters-clear-all-filters' )
	);

	this.resetButton.toggle( !hideResetButton );
	this.emptyFilterMessage.toggle( currFiltersAreEmpty );
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.createMenuWidget = function ( menuConfig ) {
	return new MenuSelectWidget(
	this.controller,
	this.model,
	menuConfig
	);
	};

	/**
	* @inheritdoc
	*/
	FilterTagMultiselectWidget.prototype.createTagItemWidget = function ( data ) {
	const filterItem = this.model.getItemByName( data );

	if ( filterItem ) {
	return new FilterTagItemWidget(
	this.controller,
	this.model,
	this.model.getInvertModel( filterItem.getGroupModel().getView() ),
	filterItem,
	{
	$overlay: this.$overlay
	}
	);
	}
	};

	FilterTagMultiselectWidget.prototype.emphasize = function () {
	if (
	// eslint-disable-next-line no-jquery/no-class-state
	!this.$handle.hasClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' )
	) {
	this.$handle
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-emphasize' )
	.addClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' );

	setTimeout( () => {
	this.$handle
	.removeClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-emphasize' );

	setTimeout( () => {
	this.$handle
	.removeClass( 'mw-rcfilters-ui-filterTagMultiselectWidget-animate' );
	}, 1000 );
	}, 500 );

	}
	};
	/**
	* Scroll the element to top within its container
	*
	* @private
	* @param {jQuery} $element Element to position
	* @param {number} [marginFromTop=0] When scrolling the entire widget to the top, leave this
	* much space (in pixels) above the widget.
	* @param {Object} [threshold] Minimum distance from the top of the element to scroll at all
	* @param {number} [threshold.min] Minimum distance above the element
	* @param {number} [threshold.max] Minimum distance below the element
	*/
	FilterTagMultiselectWidget.prototype.scrollToTop = function ( $element, marginFromTop, threshold ) {
	const container = OO.ui.Element.static.getClosestScrollableContainer( $element[ 0 ], 'y' ),
	pos = OO.ui.Element.static.getRelativePosition( $element, $( container ) ),
	containerScrollTop = $( container ).scrollTop(),
	effectiveScrollTop = $( container ).is( 'body, html' ) ? 0 : containerScrollTop,
	newScrollTop = effectiveScrollTop + pos.top - ( marginFromTop \|\| 0 );

	// Scroll to item
	if (
	threshold === undefined \|\|
	(
	(
	threshold.min === undefined \|\|
	newScrollTop - containerScrollTop >= threshold.min
	) &&
	(
	threshold.max === undefined \|\|
	newScrollTop - containerScrollTop <= threshold.max
	)
	)
	) {
	$( container ).animate( {
	scrollTop: newScrollTop
	} );
	}
	};

	module.exports = FilterTagMultiselectWidget;

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