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customize-loader.js (7904B)

---

 /**
  * @output wp-includes/js/customize-loader.js
  */
 
 /* global _wpCustomizeLoaderSettings */
 
 /**
  * Expose a public API that allows the customizer to be
  * loaded on any page.
  *
  * @namespace wp
  */
 window.wp = window.wp || {};
 
 (function( exports, $ ){
 	var api = wp.customize,
 		Loader;
 
 	$.extend( $.support, {
 		history: !! ( window.history && history.pushState ),
 		hashchange: ('onhashchange' in window) && (document.documentMode === undefined || document.documentMode > 7)
 	});
 
 	/**
 	 * Allows the Customizer to be overlayed on any page.
 	 *
 	 * By default, any element in the body with the load-customize class will open
 	 * an iframe overlay with the URL specified.
 	 *
 	 *     e.g. <a class="load-customize" href="<?php echo wp_customize_url(); ?>">Open Customizer</a>
 	 *
 	 * @memberOf wp.customize
 	 *
 	 * @class
 	 * @augments wp.customize.Events
 	 */
 	Loader = $.extend( {}, api.Events,/** @lends wp.customize.Loader.prototype */{
 		/**
 		 * Setup the Loader; triggered on document#ready.
 		 */
 		initialize: function() {
 			this.body = $( document.body );
 
 			// Ensure the loader is supported.
 			// Check for settings, postMessage support, and whether we require CORS support.
 			if ( ! Loader.settings || ! $.support.postMessage || ( ! $.support.cors && Loader.settings.isCrossDomain ) ) {
 				return;
 			}
 
 			this.window  = $( window );
 			this.element = $( '<div id="customize-container" />' ).appendTo( this.body );
 
 			// Bind events for opening and closing the overlay.
 			this.bind( 'open', this.overlay.show );
 			this.bind( 'close', this.overlay.hide );
 
 			// Any element in the body with the `load-customize` class opens
 			// the Customizer.
 			$('#wpbody').on( 'click', '.load-customize', function( event ) {
 				event.preventDefault();
 
 				// Store a reference to the link that opened the Customizer.
 				Loader.link = $(this);
 				// Load the theme.
 				Loader.open( Loader.link.attr('href') );
 			});
 
 			// Add navigation listeners.
 			if ( $.support.history ) {
 				this.window.on( 'popstate', Loader.popstate );
 			}
 
 			if ( $.support.hashchange ) {
 				this.window.on( 'hashchange', Loader.hashchange );
 				this.window.triggerHandler( 'hashchange' );
 			}
 		},
 
 		popstate: function( e ) {
 			var state = e.originalEvent.state;
 			if ( state && state.customize ) {
 				Loader.open( state.customize );
 			} else if ( Loader.active ) {
 				Loader.close();
 			}
 		},
 
 		hashchange: function() {
 			var hash = window.location.toString().split('#')[1];
 
 			if ( hash && 0 === hash.indexOf( 'wp_customize=on' ) ) {
 				Loader.open( Loader.settings.url + '?' + hash );
 			}
 
 			if ( ! hash && ! $.support.history ) {
 				Loader.close();
 			}
 		},
 
 		beforeunload: function () {
 			if ( ! Loader.saved() ) {
 				return Loader.settings.l10n.saveAlert;
 			}
 		},
 
 		/**
 		 * Open the Customizer overlay for a specific URL.
 		 *
 		 * @param string src URL to load in the Customizer.
 		 */
 		open: function( src ) {
 
 			if ( this.active ) {
 				return;
 			}
 
 			// Load the full page on mobile devices.
 			if ( Loader.settings.browser.mobile ) {
 				return window.location = src;
 			}
 
 			// Store the document title prior to opening the Live Preview.
 			this.originalDocumentTitle = document.title;
 
 			this.active = true;
 			this.body.addClass('customize-loading');
 
 			/*
 			 * Track the dirtiness state (whether the drafted changes have been published)
 			 * of the Customizer in the iframe. This is used to decide whether to display
 			 * an AYS alert if the user tries to close the window before saving changes.
 			 */
 			this.saved = new api.Value( true );
 
 			this.iframe = $( '<iframe />', { 'src': src, 'title': Loader.settings.l10n.mainIframeTitle } ).appendTo( this.element );
 			this.iframe.one( 'load', this.loaded );
 
 			// Create a postMessage connection with the iframe.
 			this.messenger = new api.Messenger({
 				url: src,
 				channel: 'loader',
 				targetWindow: this.iframe[0].contentWindow
 			});
 
 			// Expose the changeset UUID on the parent window's URL so that the customized state can survive a refresh.
 			if ( history.replaceState ) {
 				this.messenger.bind( 'changeset-uuid', function( changesetUuid ) {
 					var urlParser = document.createElement( 'a' );
 					urlParser.href = location.href;
 					urlParser.search = $.param( _.extend(
 						api.utils.parseQueryString( urlParser.search.substr( 1 ) ),
 						{ changeset_uuid: changesetUuid }
 					) );
 					history.replaceState( { customize: urlParser.href }, '', urlParser.href );
 				} );
 			}
 
 			// Wait for the connection from the iframe before sending any postMessage events.
 			this.messenger.bind( 'ready', function() {
 				Loader.messenger.send( 'back' );
 			});
 
 			this.messenger.bind( 'close', function() {
 				if ( $.support.history ) {
 					history.back();
 				} else if ( $.support.hashchange ) {
 					window.location.hash = '';
 				} else {
 					Loader.close();
 				}
 			});
 
 			// Prompt AYS dialog when navigating away.
 			$( window ).on( 'beforeunload', this.beforeunload );
 
 			this.messenger.bind( 'saved', function () {
 				Loader.saved( true );
 			} );
 			this.messenger.bind( 'change', function () {
 				Loader.saved( false );
 			} );
 
 			this.messenger.bind( 'title', function( newTitle ){
 				window.document.title = newTitle;
 			});
 
 			this.pushState( src );
 
 			this.trigger( 'open' );
 		},
 
 		pushState: function ( src ) {
 			var hash = src.split( '?' )[1];
 
 			// Ensure we don't call pushState if the user hit the forward button.
 			if ( $.support.history && window.location.href !== src ) {
 				history.pushState( { customize: src }, '', src );
 			} else if ( ! $.support.history && $.support.hashchange && hash ) {
 				window.location.hash = 'wp_customize=on&' + hash;
 			}
 
 			this.trigger( 'open' );
 		},
 
 		/**
 		 * Callback after the Customizer has been opened.
 		 */
 		opened: function() {
 			Loader.body.addClass( 'customize-active full-overlay-active' ).attr( 'aria-busy', 'true' );
 		},
 
 		/**
 		 * Close the Customizer overlay.
 		 */
 		close: function() {
 			var self = this, onConfirmClose;
 			if ( ! self.active ) {
 				return;
 			}
 
 			onConfirmClose = function( confirmed ) {
 				if ( confirmed ) {
 					self.active = false;
 					self.trigger( 'close' );
 
 					// Restore document title prior to opening the Live Preview.
 					if ( self.originalDocumentTitle ) {
 						document.title = self.originalDocumentTitle;
 					}
 				} else {
 
 					// Go forward since Customizer is exited by history.back().
 					history.forward();
 				}
 				self.messenger.unbind( 'confirmed-close', onConfirmClose );
 			};
 			self.messenger.bind( 'confirmed-close', onConfirmClose );
 
 			Loader.messenger.send( 'confirm-close' );
 		},
 
 		/**
 		 * Callback after the Customizer has been closed.
 		 */
 		closed: function() {
 			Loader.iframe.remove();
 			Loader.messenger.destroy();
 			Loader.iframe    = null;
 			Loader.messenger = null;
 			Loader.saved     = null;
 			Loader.body.removeClass( 'customize-active full-overlay-active' ).removeClass( 'customize-loading' );
 			$( window ).off( 'beforeunload', Loader.beforeunload );
 			/*
 			 * Return focus to the link that opened the Customizer overlay after
 			 * the body element visibility is restored.
 			 */
 			if ( Loader.link ) {
 				Loader.link.focus();
 			}
 		},
 
 		/**
 		 * Callback for the `load` event on the Customizer iframe.
 		 */
 		loaded: function() {
 			Loader.body.removeClass( 'customize-loading' ).attr( 'aria-busy', 'false' );
 		},
 
 		/**
 		 * Overlay hide/show utility methods.
 		 */
 		overlay: {
 			show: function() {
 				this.element.fadeIn( 200, Loader.opened );
 			},
 
 			hide: function() {
 				this.element.fadeOut( 200, Loader.closed );
 			}
 		}
 	});
 
 	// Bootstrap the Loader on document#ready.
 	$( function() {
 		Loader.settings = _wpCustomizeLoaderSettings;
 		Loader.initialize();
 	});
 
 	// Expose the API publicly on window.wp.customize.Loader.
 	api.Loader = Loader;
 })( wp, jQuery );