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Edit File: customize-base.js
/** * @output wp-includes/js/customize-base.js */ /** @namespace wp */ window.wp = window.wp || {}; (function( exports, $ ){ var api = {}, ctor, inherits, slice = Array.prototype.slice; // Shared empty constructor function to aid in prototype-chain creation. ctor = function() {}; /** * Helper function to correctly set up the prototype chain, for subclasses. * Similar to `goog.inherits`, but uses a hash of prototype properties and * class properties to be extended. * * @param object parent Parent class constructor to inherit from. * @param object protoProps Properties to apply to the prototype for use as class instance properties. * @param object staticProps Properties to apply directly to the class constructor. * @return child The subclassed constructor. */ inherits = function( parent, protoProps, staticProps ) { var child; /* * The constructor function for the new subclass is either defined by you * (the "constructor" property in your `extend` definition), or defaulted * by us to simply call `super()`. */ if ( protoProps && protoProps.hasOwnProperty( 'constructor' ) ) { child = protoProps.constructor; } else { child = function() { /* * Storing the result `super()` before returning the value * prevents a bug in Opera where, if the constructor returns * a function, Opera will reject the return value in favor of * the original object. This causes all sorts of trouble. */ var result = parent.apply( this, arguments ); return result; }; } // Inherit class (static) properties from parent. $.extend( child, parent ); // Set the prototype chain to inherit from `parent`, // without calling `parent`'s constructor function. ctor.prototype = parent.prototype; child.prototype = new ctor(); // Add prototype properties (instance properties) to the subclass, // if supplied. if ( protoProps ) { $.extend( child.prototype, protoProps ); } // Add static properties to the constructor function, if supplied. if ( staticProps ) { $.extend( child, staticProps ); } // Correctly set child's `prototype.constructor`. child.prototype.constructor = child; // Set a convenience property in case the parent's prototype is needed later. child.__super__ = parent.prototype; return child; }; /** * Base class for object inheritance. */ api.Class = function( applicator, argsArray, options ) { var magic, args = arguments; if ( applicator && argsArray && api.Class.applicator === applicator ) { args = argsArray; $.extend( this, options || {} ); } magic = this; /* * If the class has a method called "instance", * the return value from the class' constructor will be a function that * calls the "instance" method. * * It is also an object that has properties and methods inside it. */ if ( this.instance ) { magic = function() { return magic.instance.apply( magic, arguments ); }; $.extend( magic, this ); } magic.initialize.apply( magic, args ); return magic; }; /** * Creates a subclass of the class. * * @param object protoProps Properties to apply to the prototype. * @param object staticProps Properties to apply directly to the class. * @return child The subclass. */ api.Class.extend = function( protoProps, staticProps ) { var child = inherits( this, protoProps, staticProps ); child.extend = this.extend; return child; }; api.Class.applicator = {}; /** * Initialize a class instance. * * Override this function in a subclass as needed. */ api.Class.prototype.initialize = function() {}; /* * Checks whether a given instance extended a constructor. * * The magic surrounding the instance parameter causes the instanceof * keyword to return inaccurate results; it defaults to the function's * prototype instead of the constructor chain. Hence this function. */ api.Class.prototype.extended = function( constructor ) { var proto = this; while ( typeof proto.constructor !== 'undefined' ) { if ( proto.constructor === constructor ) { return true; } if ( typeof proto.constructor.__super__ === 'undefined' ) { return false; } proto = proto.constructor.__super__; } return false; }; /** * An events manager object, offering the ability to bind to and trigger events. * * Used as a mixin. */ api.Events = { trigger: function( id ) { if ( this.topics && this.topics[ id ] ) { this.topics[ id ].fireWith( this, slice.call( arguments, 1 ) ); } return this; }, bind: function( id ) { this.topics = this.topics || {}; this.topics[ id ] = this.topics[ id ] || $.Callbacks(); this.topics[ id ].add.apply( this.topics[ id ], slice.call( arguments, 1 ) ); return this; }, unbind: function( id ) { if ( this.topics && this.topics[ id ] ) { this.topics[ id ].remove.apply( this.topics[ id ], slice.call( arguments, 1 ) ); } return this; } }; /** * Observable values that support two-way binding. * * @memberOf wp.customize * @alias wp.customize.Value * * @constructor */ api.Value = api.Class.extend(/** @lends wp.customize.Value.prototype */{ /** * @param {mixed} initial The initial value. * @param {Object} options */ initialize: function( initial, options ) { this._value = initial; // @todo Potentially change this to a this.set() call. this.callbacks = $.Callbacks(); this._dirty = false; $.extend( this, options || {} ); this.set = this.set.bind( this ); }, /* * Magic. Returns a function that will become the instance. * Set to null to prevent the instance from extending a function. */ instance: function() { return arguments.length ? this.set.apply( this, arguments ) : this.get(); }, /** * Get the value. * * @return {mixed} */ get: function() { return this._value; }, /** * Set the value and trigger all bound callbacks. * * @param {Object} to New value. */ set: function( to ) { var from = this._value; to = this._setter.apply( this, arguments ); to = this.validate( to ); // Bail if the sanitized value is null or unchanged. if ( null === to || _.isEqual( from, to ) ) { return this; } this._value = to; this._dirty = true; this.callbacks.fireWith( this, [ to, from ] ); return this; }, _setter: function( to ) { return to; }, setter: function( callback ) { var from = this.get(); this._setter = callback; // Temporarily clear value so setter can decide if it's valid. this._value = null; this.set( from ); return this; }, resetSetter: function() { this._setter = this.constructor.prototype._setter; this.set( this.get() ); return this; }, validate: function( value ) { return value; }, /** * Bind a function to be invoked whenever the value changes. * * @param {...Function} A function, or multiple functions, to add to the callback stack. */ bind: function() { this.callbacks.add.apply( this.callbacks, arguments ); return this; }, /** * Unbind a previously bound function. * * @param {...Function} A function, or multiple functions, to remove from the callback stack. */ unbind: function() { this.callbacks.remove.apply( this.callbacks, arguments ); return this; }, link: function() { // values* var set = this.set; $.each( arguments, function() { this.bind( set ); }); return this; }, unlink: function() { // values* var set = this.set; $.each( arguments, function() { this.unbind( set ); }); return this; }, sync: function() { // values* var that = this; $.each( arguments, function() { that.link( this ); this.link( that ); }); return this; }, unsync: function() { // values* var that = this; $.each( arguments, function() { that.unlink( this ); this.unlink( that ); }); return this; } }); /** * A collection of observable values. * * @memberOf wp.customize * @alias wp.customize.Values * * @constructor * @augments wp.customize.Class * @mixes wp.customize.Events */ api.Values = api.Class.extend(/** @lends wp.customize.Values.prototype */{ /** * The default constructor for items of the collection. * * @type {object} */ defaultConstructor: api.Value, initialize: function( options ) { $.extend( this, options || {} ); this._value = {}; this._deferreds = {}; }, /** * Get the instance of an item from the collection if only ID is specified. * * If more than one argument is supplied, all are expected to be IDs and * the last to be a function callback that will be invoked when the requested * items are available. * * @see {api.Values.when} * * @param {string} id ID of the item. * @param {...} Zero or more IDs of items to wait for and a callback * function to invoke when they're available. Optional. * @return {mixed} The item instance if only one ID was supplied. * A Deferred Promise object if a callback function is supplied. */ instance: function( id ) { if ( arguments.length === 1 ) { return this.value( id ); } return this.when.apply( this, arguments ); }, /** * Get the instance of an item. * * @param {string} id The ID of the item. * @return {[type]} [description] */ value: function( id ) { return this._value[ id ]; }, /** * Whether the collection has an item with the given ID. * * @param {string} id The ID of the item to look for. * @return {boolean} */ has: function( id ) { return typeof this._value[ id ] !== 'undefined'; }, /** * Add an item to the collection. * * @param {string|wp.customize.Class} item - The item instance to add, or the ID for the instance to add. * When an ID string is supplied, then itemObject must be provided. * @param {wp.customize.Class} [itemObject] - The item instance when the first argument is an ID string. * @return {wp.customize.Class} The new item's instance, or an existing instance if already added. */ add: function( item, itemObject ) { var collection = this, id, instance; if ( 'string' === typeof item ) { id = item; instance = itemObject; } else { if ( 'string' !== typeof item.id ) { throw new Error( 'Unknown key' ); } id = item.id; instance = item; } if ( collection.has( id ) ) { return collection.value( id ); } collection._value[ id ] = instance; instance.parent = collection; // Propagate a 'change' event on an item up to the collection. if ( instance.extended( api.Value ) ) { instance.bind( collection._change ); } collection.trigger( 'add', instance ); // If a deferred object exists for this item, // resolve it. if ( collection._deferreds[ id ] ) { collection._deferreds[ id ].resolve(); } return collection._value[ id ]; }, /** * Create a new item of the collection using the collection's default constructor * and store it in the collection. * * @param {string} id The ID of the item. * @param {mixed} value Any extra arguments are passed into the item's initialize method. * @return {mixed} The new item's instance. */ create: function( id ) { return this.add( id, new this.defaultConstructor( api.Class.applicator, slice.call( arguments, 1 ) ) ); }, /** * Iterate over all items in the collection invoking the provided callback. * * @param {Function} callback Function to invoke. * @param {Object} context Object context to invoke the function with. Optional. */ each: function( callback, context ) { context = typeof context === 'undefined' ? this : context; $.each( this._value, function( key, obj ) { callback.call( context, obj, key ); }); }, /** * Remove an item from the collection. * * @param {string} id The ID of the item to remove. */ remove: function( id ) { var value = this.value( id ); if ( value ) { // Trigger event right before the element is removed from the collection. this.trigger( 'remove', value ); if ( value.extended( api.Value ) ) { value.unbind( this._change ); } delete value.parent; } delete this._value[ id ]; delete this._deferreds[ id ]; // Trigger removed event after the item has been eliminated from the collection. if ( value ) { this.trigger( 'removed', value ); } }, /** * Runs a callback once all requested values exist. * * when( ids*, [callback] ); * * For example: * when( id1, id2, id3, function( value1, value2, value3 ) {} ); * * @return $.Deferred.promise(); */ when: function() { var self = this, ids = slice.call( arguments ), dfd = $.Deferred(); // If the last argument is a callback, bind it to .done(). if ( typeof ids[ ids.length - 1 ] === 'function' ) { dfd.done( ids.pop() ); } /* * Create a stack of deferred objects for each item that is not * yet available, and invoke the supplied callback when they are. */ $.when.apply( $, $.map( ids, function( id ) { if ( self.has( id ) ) { return; } /* * The requested item is not available yet, create a deferred * object to resolve when it becomes available. */ return self._deferreds[ id ] = self._deferreds[ id ] || $.Deferred(); })).done( function() { var values = $.map( ids, function( id ) { return self( id ); }); // If a value is missing, we've used at least one expired deferred. // Call Values.when again to generate a new deferred. if ( values.length !== ids.length ) { // ids.push( callback ); self.when.apply( self, ids ).done( function() { dfd.resolveWith( self, values ); }); return; } dfd.resolveWith( self, values ); }); return dfd.promise(); }, /** * A helper function to propagate a 'change' event from an item * to the collection itself. */ _change: function() { this.parent.trigger( 'change', this ); } }); // Create a global events bus on the Customizer. $.extend( api.Values.prototype, api.Events ); /** * Cast a string to a jQuery collection if it isn't already. * * @param {string|jQuery collection} element */ api.ensure = function( element ) { return typeof element === 'string' ? $( element ) : element; }; /** * An observable value that syncs with an element. * * Handles inputs, selects, and textareas by default. * * @memberOf wp.customize * @alias wp.customize.Element * * @constructor * @augments wp.customize.Value * @augments wp.customize.Class */ api.Element = api.Value.extend(/** @lends wp.customize.Element */{ initialize: function( element, options ) { var self = this, synchronizer = api.Element.synchronizer.html, type, update, refresh; this.element = api.ensure( element ); this.events = ''; if ( this.element.is( 'input, select, textarea' ) ) { type = this.element.prop( 'type' ); this.events += ' change input'; synchronizer = api.Element.synchronizer.val; if ( this.element.is( 'input' ) && api.Element.synchronizer[ type ] ) { synchronizer = api.Element.synchronizer[ type ]; } } api.Value.prototype.initialize.call( this, null, $.extend( options || {}, synchronizer ) ); this._value = this.get(); update = this.update; refresh = this.refresh; this.update = function( to ) { if ( to !== refresh.call( self ) ) { update.apply( this, arguments ); } }; this.refresh = function() { self.set( refresh.call( self ) ); }; this.bind( this.update ); this.element.on( this.events, this.refresh ); }, find: function( selector ) { return $( selector, this.element ); }, refresh: function() {}, update: function() {} }); api.Element.synchronizer = {}; $.each( [ 'html', 'val' ], function( index, method ) { api.Element.synchronizer[ method ] = { update: function( to ) { this.element[ method ]( to ); }, refresh: function() { return this.element[ method ](); } }; }); api.Element.synchronizer.checkbox = { update: function( to ) { this.element.prop( 'checked', to ); }, refresh: function() { return this.element.prop( 'checked' ); } }; api.Element.synchronizer.radio = { update: function( to ) { this.element.filter( function() { return this.value === to; }).prop( 'checked', true ); }, refresh: function() { return this.element.filter( ':checked' ).val(); } }; $.support.postMessage = !! window.postMessage; /** * A communicator for sending data from one window to another over postMessage. * * @memberOf wp.customize * @alias wp.customize.Messenger * * @constructor * @augments wp.customize.Class * @mixes wp.customize.Events */ api.Messenger = api.Class.extend(/** @lends wp.customize.Messenger.prototype */{ /** * Create a new Value. * * @param {string} key Unique identifier. * @param {mixed} initial Initial value. * @param {mixed} options Options hash. Optional. * @return {Value} Class instance of the Value. */ add: function( key, initial, options ) { return this[ key ] = new api.Value( initial, options ); }, /** * Initialize Messenger. * * @param {Object} params - Parameters to configure the messenger. * {string} params.url - The URL to communicate with. * {window} params.targetWindow - The window instance to communicate with. Default window.parent. * {string} params.channel - If provided, will send the channel with each message and only accept messages a matching channel. * @param {Object} options - Extend any instance parameter or method with this object. */ initialize: function( params, options ) { // Target the parent frame by default, but only if a parent frame exists. var defaultTarget = window.parent === window ? null : window.parent; $.extend( this, options || {} ); this.add( 'channel', params.channel ); this.add( 'url', params.url || '' ); this.add( 'origin', this.url() ).link( this.url ).setter( function( to ) { var urlParser = document.createElement( 'a' ); urlParser.href = to; // Port stripping needed by IE since it adds to host but not to event.origin. return urlParser.protocol + '//' + urlParser.host.replace( /:(80|443)$/, '' ); }); // First add with no value. this.add( 'targetWindow', null ); // This avoids SecurityErrors when setting a window object in x-origin iframe'd scenarios. this.targetWindow.set = function( to ) { var from = this._value; to = this._setter.apply( this, arguments ); to = this.validate( to ); if ( null === to || from === to ) { return this; } this._value = to; this._dirty = true; this.callbacks.fireWith( this, [ to, from ] ); return this; }; // Now set it. this.targetWindow( params.targetWindow || defaultTarget ); /* * Since we want jQuery to treat the receive function as unique * to this instance, we give the function a new guid. * * This will prevent every Messenger's receive function from being * unbound when calling $.off( 'message', this.receive ); */ this.receive = this.receive.bind( this ); this.receive.guid = $.guid++; $( window ).on( 'message', this.receive ); }, destroy: function() { $( window ).off( 'message', this.receive ); }, /** * Receive data from the other window. * * @param {jQuery.Event} event Event with embedded data. */ receive: function( event ) { var message; event = event.originalEvent; if ( ! this.targetWindow || ! this.targetWindow() ) { return; } // Check to make sure the origin is valid. if ( this.origin() && event.origin !== this.origin() ) { return; } // Ensure we have a string that's JSON.parse-able. if ( typeof event.data !== 'string' || event.data[0] !== '{' ) { return; } message = JSON.parse( event.data ); // Check required message properties. if ( ! message || ! message.id || typeof message.data === 'undefined' ) { return; } // Check if channel names match. if ( ( message.channel || this.channel() ) && this.channel() !== message.channel ) { return; } this.trigger( message.id, message.data ); }, /** * Send data to the other window. * * @param {string} id The event name. * @param {Object} data Data. */ send: function( id, data ) { var message; data = typeof data === 'undefined' ? null : data; if ( ! this.url() || ! this.targetWindow() ) { return; } message = { id: id, data: data }; if ( this.channel() ) { message.channel = this.channel(); } this.targetWindow().postMessage( JSON.stringify( message ), this.origin() ); } }); // Add the Events mixin to api.Messenger. $.extend( api.Messenger.prototype, api.Events ); /** * Notification. * * @class * @augments wp.customize.Class * @since 4.6.0 * * @memberOf wp.customize * @alias wp.customize.Notification * * @param {string} code - The error code. * @param {object} params - Params. * @param {string} params.message=null - The error message. * @param {string} [params.type=error] - The notification type. * @param {boolean} [params.fromServer=false] - Whether the notification was server-sent. * @param {string} [params.setting=null] - The setting ID that the notification is related to. * @param {*} [params.data=null] - Any additional data. */ api.Notification = api.Class.extend(/** @lends wp.customize.Notification.prototype */{ /** * Template function for rendering the notification. * * This will be populated with template option or else it will be populated with template from the ID. * * @since 4.9.0 * @var {Function} */ template: null, /** * ID for the template to render the notification. * * @since 4.9.0 * @var {string} */ templateId: 'customize-notification', /** * Additional class names to add to the notification container. * * @since 4.9.0 * @var {string} */ containerClasses: '', /** * Initialize notification. * * @since 4.9.0 * * @param {string} code - Notification code. * @param {Object} params - Notification parameters. * @param {string} params.message - Message. * @param {string} [params.type=error] - Type. * @param {string} [params.setting] - Related setting ID. * @param {Function} [params.template] - Function for rendering template. If not provided, this will come from templateId. * @param {string} [params.templateId] - ID for template to render the notification. * @param {string} [params.containerClasses] - Additional class names to add to the notification container. * @param {boolean} [params.dismissible] - Whether the notification can be dismissed. */ initialize: function( code, params ) { var _params; this.code = code; _params = _.extend( { message: null, type: 'error', fromServer: false, data: null, setting: null, template: null, dismissible: false, containerClasses: '' }, params ); delete _params.code; _.extend( this, _params ); }, /** * Render the notification. * * @since 4.9.0 * * @return {jQuery} Notification container element. */ render: function() { var notification = this, container, data; if ( ! notification.template ) { notification.template = wp.template( notification.templateId ); } data = _.extend( {}, notification, { alt: notification.parent && notification.parent.alt } ); container = $( notification.template( data ) ); if ( notification.dismissible ) { container.find( '.notice-dismiss' ).on( 'click keydown', function( event ) { if ( 'keydown' === event.type && 13 !== event.which ) { return; } if ( notification.parent ) { notification.parent.remove( notification.code ); } else { container.remove(); } }); } return container; } }); // The main API object is also a collection of all customizer settings. api = $.extend( new api.Values(), api ); /** * Get all customize settings. * * @alias wp.customize.get * * @return {Object} */ api.get = function() { var result = {}; this.each( function( obj, key ) { result[ key ] = obj.get(); }); return result; }; /** * Utility function namespace * * @namespace wp.customize.utils */ api.utils = {}; /** * Parse query string. * * @since 4.7.0 * @access public * * @alias wp.customize.utils.parseQueryString * * @param {string} queryString Query string. * @return {Object} Parsed query string. */ api.utils.parseQueryString = function parseQueryString( queryString ) { var queryParams = {}; _.each( queryString.split( '&' ), function( pair ) { var parts, key, value; parts = pair.split( '=', 2 ); if ( ! parts[0] ) { return; } key = decodeURIComponent( parts[0].replace( /\+/g, ' ' ) ); key = key.replace( / /g, '_' ); // What PHP does. if ( _.isUndefined( parts[1] ) ) { value = null; } else { value = decodeURIComponent( parts[1].replace( /\+/g, ' ' ) ); } queryParams[ key ] = value; } ); return queryParams; }; /** * Expose the API publicly on window.wp.customize * * @namespace wp.customize */ exports.customize = api; })( wp, jQuery );