# all files / src/mixins/ AccessKeyedElement.js

87.18% Statements 34/39
73.33% Branches 22/30
100% Functions 5/5
87.18% Lines 34/39

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     /**
     * AccessKeyedElement is mixed into other classes to provide an `accesskey` attribute.
     * Accesskeys allow an user to go to a specific element by using
     * a shortcut combination of a browser specific keys + the key
     * set to the field.
     *
     *     @example
     *     // AccessKeyedElement provides an 'accesskey' attribute to the
     *     // ButtonWidget class
     *     var button = new OO.ui.ButtonWidget( {
     *         label: 'Button with Accesskey',
     *         accessKey: 'k'
     *     } );
     *     $( 'body' ).append( button.$element );
     *
     * @abstract
     * @class
     *
     * @constructor
     * @param {Object} [config] Configuration options
     * @cfg {jQuery} [$accessKeyed] The element to which the `accesskey` attribute is applied.
     *  If this config is omitted, the accesskey functionality is applied to $element, the
     *  element created by the class.
     * @cfg {string|Function} [accessKey] The key or a function that returns the key. If
     *  this config is omitted, no accesskey will be added.
     */
    OO.ui.mixin.AccessKeyedElement = function OoUiMixinAccessKeyedElement( config ) {
    	// Configuration initialization
    	config = config || {};

    	// Properties
    	this.$accessKeyed = null;
    	this.accessKey = null;

    	// Initialization
    	this.setAccessKey( config.accessKey || null );
    	this.setAccessKeyedElement( config.$accessKeyed || this.$element );

    	// If this is also a TitledElement and it initialized before we did, we may have
    	// to update the title with the access key
    	if ( this.updateTitle ) {
    		this.updateTitle();
    	}
    };

    /* Setup */

    OO.initClass( OO.ui.mixin.AccessKeyedElement );

    /* Static Properties */

    /**
     * The access key, a function that returns a key, or `null` for no accesskey.
     *
     * @static
     * @inheritable
     * @property {string|Function|null}
     */
    OO.ui.mixin.AccessKeyedElement.static.accessKey = null;

    /* Methods */

    /**
     * Set the accesskeyed element.
     *
     * This method is used to retarget a AccessKeyedElement mixin so that its functionality applies to the specified element.
     * If an element is already set, the mixin's effect on that element is removed before the new element is set up.
     *
     * @param {jQuery} $accessKeyed Element that should use the 'accesskeyes' functionality
     */
    OO.ui.mixin.AccessKeyedElement.prototype.setAccessKeyedElement = function ( $accessKeyed ) {
    	Iif ( this.$accessKeyed ) {
    		this.$accessKeyed.removeAttr( 'accesskey' );
    	}

    	this.$accessKeyed = $accessKeyed;
    	if ( this.accessKey ) {
    		this.$accessKeyed.attr( 'accesskey', this.accessKey );
    	}
    };

    /**
     * Set accesskey.
     *
     * @param {string|Function|null} accessKey Key, a function that returns a key, or `null` for no accesskey
     * @chainable
     */
    OO.ui.mixin.AccessKeyedElement.prototype.setAccessKey = function ( accessKey ) {
    	accessKey = typeof accessKey === 'string' ? OO.ui.resolveMsg( accessKey ) : null;

    	if ( this.accessKey !== accessKey ) {
    		Iif ( this.$accessKeyed ) {
    			if ( accessKey !== null ) {
    				this.$accessKeyed.attr( 'accesskey', accessKey );
    			} else {
    				this.$accessKeyed.removeAttr( 'accesskey' );
    			}
    		}
    		this.accessKey = accessKey;

    		// Only if this is a TitledElement
    		Eif ( this.updateTitle ) {
    			this.updateTitle();
    		}
    	}

    	return this;
    };

    /**
     * Get accesskey.
     *
     * @return {string} accessKey string
     */
    OO.ui.mixin.AccessKeyedElement.prototype.getAccessKey = function () {
    	return this.accessKey;
    };

    /**
     * Add information about the access key to the element's tooltip label.
     * (This is only public for hacky usage in FieldLayout.)
     *
     * @param {string} title Tooltip label for `title` attribute
     * @return {string}
     */
    OO.ui.mixin.AccessKeyedElement.prototype.formatTitleWithAccessKey = function ( title ) {
    	var accessKey;

    	if ( !this.$accessKeyed ) {
    		// Not initialized yet; the constructor will call updateTitle() which will rerun this function
    		return title;
    	}
    	// Use jquery.accessKeyLabel if available to show modifiers, otherwise just display the single key
    	Iif ( $.fn.updateTooltipAccessKeys && $.fn.updateTooltipAccessKeys.getAccessKeyLabel ) {
    		accessKey = $.fn.updateTooltipAccessKeys.getAccessKeyLabel( this.$accessKeyed[ 0 ] );
    	} else {
    		accessKey = this.getAccessKey();
    	}
    	if ( accessKey ) {
    		title += ' [' + accessKey + ']';
    	}
    	return title;
    };