# all files / src/widgets/ CheckboxMultiselectInputWidget.js

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     /**
     * CheckboxMultiselectInputWidget is a
     * {@link OO.ui.CheckboxMultiselectWidget CheckboxMultiselectWidget} intended to be used within a
     * HTML form, such as a OO.ui.FormLayout. The selected values are synchronized with the value of
     * HTML `<input type=checkbox>` tags. Please see the [OOjs UI documentation on MediaWiki][1] for
     * more information about input widgets.
     *
     *     @example
     *     // Example: A CheckboxMultiselectInputWidget with three options
     *     var multiselectInput = new OO.ui.CheckboxMultiselectInputWidget( {
     *         options: [
     *             { data: 'a', label: 'First' },
     *             { data: 'b', label: 'Second'},
     *             { data: 'c', label: 'Third' }
     *         ]
     *     } );
     *     $( 'body' ).append( multiselectInput.$element );
     *
     * [1]: https://www.mediawiki.org/wiki/OOjs_UI/Widgets/Inputs
     *
     * @class
     * @extends OO.ui.InputWidget
     *
     * @constructor
     * @param {Object} [config] Configuration options
     * @cfg {Object[]} [options=[]] Array of menu options in the format `{ data: …, label: …, disabled: … }`
     */
    OO.ui.CheckboxMultiselectInputWidget = function OoUiCheckboxMultiselectInputWidget( config ) {
    	// Configuration initialization
    	config = config || {};

    	// Properties (must be done before parent constructor which calls #setDisabled)
    	this.checkboxMultiselectWidget = new OO.ui.CheckboxMultiselectWidget();

    	// Parent constructor
    	OO.ui.CheckboxMultiselectInputWidget.parent.call( this, config );

    	// Properties
    	this.inputName = config.name;

    	// Initialization
    	this.$element
    		.addClass( 'oo-ui-checkboxMultiselectInputWidget' )
    		.append( this.checkboxMultiselectWidget.$element );
    	// We don't use this.$input, but rather the CheckboxInputWidgets inside each option
    	this.$input.detach();
    	this.setOptions( config.options || [] );
    	// Have to repeat this from parent, as we need options to be set up for this to make sense
    	this.setValue( config.value );

    	// setValue when checkboxMultiselectWidget changes
    	this.checkboxMultiselectWidget.on( 'change', function () {
    		this.setValue( this.checkboxMultiselectWidget.getSelectedItemsData() );
    	}.bind( this ) );
    };

    /* Setup */

    OO.inheritClass( OO.ui.CheckboxMultiselectInputWidget, OO.ui.InputWidget );

    /* Static Methods */

    /**
     * @inheritdoc
     */
    OO.ui.CheckboxMultiselectInputWidget.static.gatherPreInfuseState = function ( node, config ) {
    	var state = OO.ui.CheckboxMultiselectInputWidget.parent.static.gatherPreInfuseState( node, config );
    	state.value = $( node ).find( '.oo-ui-checkboxInputWidget .oo-ui-inputWidget-input:checked' )
    		.toArray().map( function ( el ) { return el.value; } );
    	return state;
    };

    /**
     * @inheritdoc
     */
    OO.ui.CheckboxMultiselectInputWidget.static.reusePreInfuseDOM = function ( node, config ) {
    	config = OO.ui.CheckboxMultiselectInputWidget.parent.static.reusePreInfuseDOM( node, config );
    	// Cannot reuse the `<input type=checkbox>` set
    	delete config.$input;
    	return config;
    };

    /* Methods */

    /**
     * @inheritdoc
     * @protected
     */
    OO.ui.CheckboxMultiselectInputWidget.prototype.getInputElement = function () {
    	// Actually unused
    	return $( '<unused>' );
    };

    /**
     * @inheritdoc
     */
    OO.ui.CheckboxMultiselectInputWidget.prototype.getValue = function () {
    	var value = this.$element.find( '.oo-ui-checkboxInputWidget .oo-ui-inputWidget-input:checked' )
    		.toArray().map( function ( el ) { return el.value; } );
    	Eif ( this.value !== value ) {
    		this.setValue( value );
    	}
    	return this.value;
    };

    /**
     * @inheritdoc
     */
    OO.ui.CheckboxMultiselectInputWidget.prototype.setValue = function ( value ) {
    	value = this.cleanUpValue( value );
    	this.checkboxMultiselectWidget.selectItemsByData( value );
    	OO.ui.CheckboxMultiselectInputWidget.parent.prototype.setValue.call( this, value );
    	return this;
    };

    /**
     * Clean up incoming value.
     *
     * @param {string[]} value Original value
     * @return {string[]} Cleaned up value
     */
    OO.ui.CheckboxMultiselectInputWidget.prototype.cleanUpValue = function ( value ) {
    	var i, singleValue,
    		cleanValue = [];
    	if ( !Array.isArray( value ) ) {
    		return cleanValue;
    	}
    	for ( i = 0; i < value.length; i++ ) {
    		singleValue =
    			OO.ui.CheckboxMultiselectInputWidget.parent.prototype.cleanUpValue.call( this, value[ i ] );
    		// Remove options that we don't have here
    		if ( !this.checkboxMultiselectWidget.findItemFromData( singleValue ) ) {
    			continue;
    		}
    		cleanValue.push( singleValue );
    	}
    	return cleanValue;
    };

    /**
     * @inheritdoc
     */
    OO.ui.CheckboxMultiselectInputWidget.prototype.setDisabled = function ( state ) {
    	this.checkboxMultiselectWidget.setDisabled( state );
    	OO.ui.CheckboxMultiselectInputWidget.parent.prototype.setDisabled.call( this, state );
    	return this;
    };

    /**
     * Set the options available for this input.
     *
     * @param {Object[]} options Array of menu options in the format `{ data: …, label: …, disabled: … }`
     * @chainable
     */
    OO.ui.CheckboxMultiselectInputWidget.prototype.setOptions = function ( options ) {
    	var widget = this;

    	// Rebuild the checkboxMultiselectWidget menu
    	this.checkboxMultiselectWidget
    		.clearItems()
    		.addItems( options.map( function ( opt ) {
    			var optValue, item, optDisabled;
    			optValue =
    				OO.ui.CheckboxMultiselectInputWidget.parent.prototype.cleanUpValue.call( widget, opt.data );
    			optDisabled = opt.disabled !== undefined ? opt.disabled : false;
    			item = new OO.ui.CheckboxMultioptionWidget( {
    				data: optValue,
    				label: opt.label !== undefined ? opt.label : optValue,
    				disabled: optDisabled
    			} );
    			// Set the 'name' and 'value' for form submission
    			item.checkbox.$input.attr( 'name', widget.inputName );
    			item.checkbox.setValue( optValue );
    			return item;
    		} ) );

    	// Re-set the value, checking the checkboxes as needed.
    	// This will also get rid of any stale options that we just removed.
    	this.setValue( this.getValue() );

    	return this;
    };

    /**
     * @inheritdoc
     */
    OO.ui.CheckboxMultiselectInputWidget.prototype.focus = function () {
    	this.checkboxMultiselectWidget.focus();
    	return this;
    };