--- /dev/null
+if ( typeof wp === 'undefined' )
+ var wp = {};
+
+(function( exports, $ ){
+ var api, extend, ctor, inherits,
+ slice = Array.prototype.slice;
+
+ /* =====================================================================
+ * Micro-inheritance - thank you, backbone.js.
+ * ===================================================================== */
+
+ extend = function( protoProps, classProps ) {
+ var child = inherits( this, protoProps, classProps );
+ child.extend = this.extend;
+ return child;
+ };
+
+ // 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.
+ 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;
+ };
+
+ api = {};
+
+ /* =====================================================================
+ * Base class.
+ * ===================================================================== */
+
+ 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 ( this.instance ) {
+ magic = function() {
+ return magic.instance.apply( magic, arguments );
+ };
+
+ $.extend( magic, this );
+ }
+
+ magic.initialize.apply( magic, args );
+ return magic;
+ };
+
+ api.Class.applicator = {};
+
+ 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;
+ };
+
+ api.Class.extend = extend;
+
+ /* =====================================================================
+ * Events 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, callback ) {
+ 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, callback ) {
+ 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.
+ * ===================================================================== */
+
+ api.Value = api.Class.extend({
+ initialize: function( initial, options ) {
+ this._value = initial; // @todo: potentially change this to a this.set() call.
+ this.callbacks = $.Callbacks();
+
+ $.extend( this, options || {} );
+
+ this.set = $.proxy( this.set, 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: function() {
+ return this._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 || this._value === to )
+ return this;
+
+ this._value = to;
+
+ 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: function( callback ) {
+ this.callbacks.add.apply( this.callbacks, arguments );
+ return this;
+ },
+
+ unbind: function( callback ) {
+ 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.
+ * ===================================================================== */
+
+ api.Values = api.Class.extend({
+ defaultConstructor: api.Value,
+
+ initialize: function( options ) {
+ $.extend( this, options || {} );
+
+ this._value = {};
+ this._deferreds = {};
+ },
+
+ instance: function( id ) {
+ if ( arguments.length === 1 )
+ return this.value( id );
+
+ return this.when.apply( this, arguments );
+ },
+
+ value: function( id ) {
+ return this._value[ id ];
+ },
+
+ has: function( id ) {
+ return typeof this._value[ id ] !== 'undefined';
+ },
+
+ add: function( id, value ) {
+ if ( this.has( id ) )
+ return this.value( id );
+
+ this._value[ id ] = value;
+ value.parent = this;
+ if ( value.extended( api.Value ) )
+ value.bind( this._change );
+
+ this.trigger( 'add', value );
+
+ if ( this._deferreds[ id ] )
+ this._deferreds[ id ].resolve();
+
+ return this._value[ id ];
+ },
+
+ create: function( id ) {
+ return this.add( id, new this.defaultConstructor( api.Class.applicator, slice.call( arguments, 1 ) ) );
+ },
+
+ each: function( callback, context ) {
+ context = typeof context === 'undefined' ? this : context;
+
+ $.each( this._value, function( key, obj ) {
+ callback.call( context, obj, key );
+ });
+ },
+
+ remove: function( id ) {
+ var value;
+
+ if ( this.has( id ) ) {
+ value = this.value( id );
+ this.trigger( 'remove', value );
+ if ( value.extended( api.Value ) )
+ value.unbind( this._change );
+ delete value.parent;
+ }
+
+ delete this._value[ id ];
+ delete this._deferreds[ id ];
+ },
+
+ /**
+ * Runs a callback once all requested values exist.
+ *
+ * when( ids*, [callback] );
+ *
+ * For example:
+ * when( id1, id2, id3, function( value1, value2, value3 ) {} );
+ *
+ * @returns $.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 ( $.isFunction( ids[ ids.length - 1 ] ) )
+ dfd.done( ids.pop() );
+
+ $.when.apply( $, $.map( ids, function( id ) {
+ if ( self.has( id ) )
+ return;
+
+ 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();
+ },
+
+ _change: function() {
+ this.parent.trigger( 'change', this );
+ }
+ });
+
+ $.extend( api.Values.prototype, api.Events );
+
+ /* =====================================================================
+ * An observable value that syncs with an element.
+ *
+ * Handles inputs, selects, and textareas by default.
+ * ===================================================================== */
+
+ api.ensure = function( element ) {
+ return typeof element == 'string' ? $( element ) : element;
+ };
+
+ api.Element = api.Value.extend({
+ 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') ) {
+ this.events += 'change';
+ synchronizer = api.Element.synchronizer.val;
+
+ if ( this.element.is('input') ) {
+ type = this.element.prop('type');
+ if ( api.Element.synchronizer[ type ] )
+ synchronizer = api.Element.synchronizer[ type ];
+ if ( 'text' === type || 'password' === type )
+ this.events += ' keyup';
+ } else if ( this.element.is('textarea') ) {
+ this.events += ' keyup';
+ }
+ }
+
+ 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.bind( this.events, this.refresh );
+ },
+
+ find: function( selector ) {
+ return $( selector, this.element );
+ },
+
+ refresh: function() {},
+
+ update: function() {}
+ });
+
+ api.Element.synchronizer = {};
+
+ $.each( [ 'html', 'val' ], function( i, 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();
+ }
+ };
+
+ /* =====================================================================
+ * Messenger for postMessage.
+ * ===================================================================== */
+
+ $.support.postMessage = !! window.postMessage;
+
+ api.Messenger = api.Class.extend({
+ add: function( key, initial, options ) {
+ return this[ key ] = new api.Value( initial, options );
+ },
+
+ /**
+ * Initialize Messenger.
+ *
+ * @param {object} params Parameters to configure the messenger.
+ * {string} .url The URL to communicate with.
+ * {window} .targetWindow The window instance to communicate with. Default window.parent.
+ * {string} .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( 'targetWindow', params.targetWindow || defaultTarget );
+ this.add( 'origin', this.url() ).link( this.url ).setter( function( to ) {
+ return to.replace( /([^:]+:\/\/[^\/]+).*/, '$1' );
+ });
+
+ // 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 = $.proxy( this.receive, this );
+ this.receive.guid = $.guid++;
+
+ $( window ).on( 'message', this.receive );
+ },
+
+ destroy: function() {
+ $( window ).off( 'message', this.receive );
+ },
+
+ receive: function( event ) {
+ var message;
+
+ event = event.originalEvent;
+
+ if ( ! this.targetWindow() )
+ return;
+
+ // Check to make sure the origin is valid.
+ if ( this.origin() && event.origin !== this.origin() )
+ 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: 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 );
+
+ /* =====================================================================
+ * Core customize object.
+ * ===================================================================== */
+
+ api = $.extend( new api.Values(), api );
+ api.get = function() {
+ var result = {};
+
+ this.each( function( obj, key ) {
+ result[ key ] = obj.get();
+ });
+
+ return result;
+ };
+
+ // Expose the API to the world.
+ exports.customize = api;
+})( wp, jQuery );
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