Adding upstream version 6.4.3+dfsg1.upstream/6.4.3+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 994 insertions, 0 deletions

diff --git a/wp-includes/js/customize-base.js b/wp-includes/js/customize-base.js
new file mode 100644
index 0000000..4afaa94
--- /dev/null
+++ b/wp-includes/js/customize-base.js
@@ -0,0 +1,994 @@
+/**
+ * @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 );