# all files / src/widgets/ PopupTagMultiselectWidget.js

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     /**
     * PopupTagMultiselectWidget is a {@link OO.ui.TagMultiselectWidget OO.ui.TagMultiselectWidget} intended
     * to use a popup. The popup can be configured to have a default input to insert values into the widget.
     *
     *     @example
     *     // Example: A basic PopupTagMultiselectWidget.
     *     var widget = new OO.ui.PopupTagMultiselectWidget();
     *     $( 'body' ).append( widget.$element );
     *
     *     // Example: A PopupTagMultiselectWidget with an external popup.
     *     var popupInput = new OO.ui.TextInputWidget(),
     *         widget = new OO.ui.PopupTagMultiselectWidget( {
     *            popupInput: popupInput,
     *            popup: {
     *               $content: popupInput.$element
     *            }
     *         } );
     *     $( 'body' ).append( widget.$element );
     *
     * @class
     * @extends OO.ui.TagMultiselectWidget
     * @mixins OO.ui.mixin.PopupElement
     *
     * @param {Object} config Configuration object
     * @cfg {jQuery} [$overlay] An overlay for the popup.
     *  See <https://www.mediawiki.org/wiki/OOUI/Concepts#Overlays>.
     * @cfg {Object} [popup] Configuration options for the popup
     * @cfg {OO.ui.InputWidget} [popupInput] An input widget inside the popup that will be
     *  focused when the popup is opened and will be used as replacement for the
     *  general input in the widget.
     */
    OO.ui.PopupTagMultiselectWidget = function OoUiPopupTagMultiselectWidget( config ) {
    	var defaultInput,
    		defaultConfig = { popup: {} };

    	config = config || {};

    	// Parent constructor
    	OO.ui.PopupTagMultiselectWidget.parent.call( this, $.extend( { inputPosition: 'none' }, config ) );

    	this.$overlay = ( config.$overlay === true ? OO.ui.getDefaultOverlay() : config.$overlay ) || this.$element;

    	if ( !config.popup ) {
    		// For the default base implementation, we give a popup
    		// with an input widget inside it. For any other use cases
    		// the popup needs to be populated externally and the
    		// event handled to add tags separately and manually
    		defaultInput = new OO.ui.TextInputWidget();

    		defaultConfig.popupInput = defaultInput;
    		defaultConfig.popup.$content = defaultInput.$element;

    		this.$element.addClass( 'oo-ui-popupTagMultiselectWidget-defaultPopup' );
    	}

    	// Add overlay, and add that to the autoCloseIgnore
    	defaultConfig.popup.$overlay = this.$overlay;
    	defaultConfig.popup.$autoCloseIgnore = this.hasInput ?
    		this.input.$element.add( this.$overlay ) : this.$overlay;

    	// Allow extending any of the above
    	config = $.extend( defaultConfig, config );

    	// Mixin constructors
    	OO.ui.mixin.PopupElement.call( this, config );

    	if ( this.hasInput ) {
    		this.input.$input.on( 'focus', this.popup.toggle.bind( this.popup, true ) );
    	}

    	// Configuration options
    	this.popupInput = config.popupInput;
    	if ( this.popupInput ) {
    		this.popupInput.connect( this, {
    			enter: 'onPopupInputEnter'
    		} );
    	}

    	// Events
    	this.on( 'resize', this.popup.updateDimensions.bind( this.popup ) );
    	this.popup.connect( this, { toggle: 'onPopupToggle' } );
    	this.$tabIndexed
    		.on( 'focus', this.onFocus.bind( this ) );

    	// Initialize
    	this.$element
    		.append( this.popup.$element )
    		.addClass( 'oo-ui-popupTagMultiselectWidget' );
    };

    /* Initialization */

    OO.inheritClass( OO.ui.PopupTagMultiselectWidget, OO.ui.TagMultiselectWidget );
    OO.mixinClass( OO.ui.PopupTagMultiselectWidget, OO.ui.mixin.PopupElement );

    /* Methods */

    /**
     * Focus event handler.
     *
     * @private
     */
    OO.ui.PopupTagMultiselectWidget.prototype.onFocus = function () {
    	this.popup.toggle( true );
    };

    /**
     * Respond to popup toggle event
     *
     * @param {boolean} isVisible Popup is visible
     */
    OO.ui.PopupTagMultiselectWidget.prototype.onPopupToggle = function ( isVisible ) {
    	if ( isVisible && this.popupInput ) {
    		this.popupInput.focus();
    	}
    };

    /**
     * Respond to popup input enter event
     */
    OO.ui.PopupTagMultiselectWidget.prototype.onPopupInputEnter = function () {
    	if ( this.popupInput ) {
    		this.addTagByPopupValue( this.popupInput.getValue() );
    		this.popupInput.setValue( '' );
    	}
    };

    /**
     * @inheritdoc
     */
    OO.ui.PopupTagMultiselectWidget.prototype.onTagSelect = function ( item ) {
    	if ( this.popupInput && this.allowEditTags ) {
    		this.popupInput.setValue( item.getData() );
    		this.removeItems( [ item ] );

    		this.popup.toggle( true );
    		this.popupInput.focus();
    	} else {
    		// Parent
    		OO.ui.PopupTagMultiselectWidget.parent.prototype.onTagSelect.call( this, item );
    	}
    };

    /**
     * Add a tag by the popup value.
     * Whatever is responsible for setting the value in the popup should call
     * this method to add a tag, or use the regular methods like #addTag or
     * #setValue directly.
     *
     * @param {string} data The value of item
     * @param {string} [label] The label of the tag. If not given, the data is used.
     */
    OO.ui.PopupTagMultiselectWidget.prototype.addTagByPopupValue = function ( data, label ) {
    	this.addTag( data, label );
    };