ve.ui.MWReferenceGroupInputWidget.js
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ve.ui.MWReferenceGroupInputWidget.js
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	'use strict';

	/*!
	* VisualEditor UserInterface MWReferenceGroupInput class.
	*
	* @copyright 2011-2018 VisualEditor Team's Cite sub-team and others; see AUTHORS.txt
	* @license MIT
	*/

	/**
	* Creates an ve.ui.MWReferenceGroupInput object.
	*
	* @class
	* @extends OO.ui.ComboBoxInputWidget
	*
	* @constructor
	* @param {Object} config
	* @param {string} config.emptyGroupName Label of the placeholder item
	*/
	ve.ui.MWReferenceGroupInputWidget = function VeUiMWReferenceGroupInputWidget( config ) {
	this.emptyGroupName = config.emptyGroupName;

	// Parent constructor
	ve.ui.MWReferenceGroupInputWidget.super.call(
	this,
	ve.extendObject( { placeholder: config.emptyGroupName }, config )
	);

	this.$element.addClass( 've-ui-mwReferenceGroupInputWidget' );
	};

	/* Inheritance */

	OO.inheritClass( ve.ui.MWReferenceGroupInputWidget, OO.ui.ComboBoxInputWidget );

	/* Methods */

	/**
	* Populate the reference group menu
	*
	* @param {string[]} groups Group names
	*/
	ve.ui.MWReferenceGroupInputWidget.prototype.populateMenu = function ( groups ) {
	const items = [ new OO.ui.MenuOptionWidget( {
	data: '',
	label: this.emptyGroupName
	} ) ];
	groups.forEach( ( groupName ) => {
	const match = /^mwReference\/(.+)/.exec( groupName );
	if ( match ) {
	items.push( new OO.ui.MenuOptionWidget( { data: match[ 1 ], label: match[ 1 ] } ) );
	}
	} );
	this.menu.clearItems().addItems( items ).toggle( false );
	};