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/* global _wpCustomizeLoaderSettings, confirm */ |
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window.wp = window.wp || {}; |
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(function( exports, $ ){ |
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var api = wp.customize, |
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Loader; |
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$.extend( $.support, { |
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history: !! ( window.history && history.pushState ), |
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hashchange: ('onhashchange' in window) && (document.documentMode === undefined || document.documentMode > 7) |
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}); |
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/** |
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* Allows the Customizer to be overlayed on any page. |
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* |
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* By default, any element in the body with the load-customize class will open |
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* an iframe overlay with the URL specified. |
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* |
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* e.g. <a class="load-customize" href="<?php echo wp_customize_url(); ?>">Open Customizer</a> |
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* |
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* @augments wp.customize.Events |
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*/ |
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Loader = $.extend( {}, api.Events, { |
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/** |
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* Setup the Loader; triggered on document#ready. |
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*/ |
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initialize: function() { |
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this.body = $( document.body ); |
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// Ensure the loader is supported. |
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// Check for settings, postMessage support, and whether we require CORS support. |
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if ( ! Loader.settings || ! $.support.postMessage || ( ! $.support.cors && Loader.settings.isCrossDomain ) ) { |
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return; |
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} |
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this.window = $( window ); |
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this.element = $( '<div id="customize-container" />' ).appendTo( this.body ); |
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// Bind events for opening and closing the overlay. |
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this.bind( 'open', this.overlay.show ); |
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this.bind( 'close', this.overlay.hide ); |
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// Any element in the body with the `load-customize` class opens |
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// the Customizer. |
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$('#wpbody').on( 'click', '.load-customize', function( event ) { |
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event.preventDefault(); |
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// Store a reference to the link that opened the Customizer. |
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Loader.link = $(this); |
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// Load the theme. |
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Loader.open( Loader.link.attr('href') ); |
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}); |
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// Add navigation listeners. |
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if ( $.support.history ) { |
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this.window.on( 'popstate', Loader.popstate ); |
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} |
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if ( $.support.hashchange ) { |
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this.window.on( 'hashchange', Loader.hashchange ); |
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this.window.triggerHandler( 'hashchange' ); |
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} |
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}, |
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popstate: function( e ) { |
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var state = e.originalEvent.state; |
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if ( state && state.customize ) { |
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Loader.open( state.customize ); |
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} else if ( Loader.active ) { |
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Loader.close(); |
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} |
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}, |
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hashchange: function() { |
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var hash = window.location.toString().split('#')[1]; |
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if ( hash && 0 === hash.indexOf( 'wp_customize=on' ) ) { |
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Loader.open( Loader.settings.url + '?' + hash ); |
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} |
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if ( ! hash && ! $.support.history ) { |
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Loader.close(); |
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} |
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}, |
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beforeunload: function () { |
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if ( ! Loader.saved() ) { |
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return Loader.settings.l10n.saveAlert; |
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} |
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}, |
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/** |
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* Open the Customizer overlay for a specific URL. |
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* |
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* @param string src URL to load in the Customizer. |
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*/ |
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open: function( src ) { |
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if ( this.active ) { |
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return; |
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} |
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// Load the full page on mobile devices. |
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if ( Loader.settings.browser.mobile ) { |
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return window.location = src; |
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} |
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// Store the document title prior to opening the Live Preview |
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this.originalDocumentTitle = document.title; |
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this.active = true; |
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this.body.addClass('customize-loading'); |
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// Dirty state of Customizer in iframe |
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this.saved = new api.Value( true ); |
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this.iframe = $( '<iframe />', { 'src': src, 'title': Loader.settings.l10n.mainIframeTitle } ).appendTo( this.element ); |
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this.iframe.one( 'load', this.loaded ); |
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// Create a postMessage connection with the iframe. |
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this.messenger = new api.Messenger({ |
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url: src, |
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channel: 'loader', |
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targetWindow: this.iframe[0].contentWindow |
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}); |
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// Wait for the connection from the iframe before sending any postMessage events. |
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this.messenger.bind( 'ready', function() { |
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Loader.messenger.send( 'back' ); |
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}); |
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this.messenger.bind( 'close', function() { |
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if ( $.support.history ) { |
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history.back(); |
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} else if ( $.support.hashchange ) { |
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window.location.hash = ''; |
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} else { |
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Loader.close(); |
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} |
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}); |
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// Prompt AYS dialog when navigating away |
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$( window ).on( 'beforeunload', this.beforeunload ); |
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this.messenger.bind( 'activated', function( location ) { |
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if ( location ) { |
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window.location = location; |
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} |
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}); |
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this.messenger.bind( 'saved', function () { |
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Loader.saved( true ); |
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} ); |
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this.messenger.bind( 'change', function () { |
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Loader.saved( false ); |
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} ); |
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this.messenger.bind( 'title', function( newTitle ){ |
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window.document.title = newTitle; |
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}); |
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this.pushState( src ); |
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this.trigger( 'open' ); |
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}, |
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pushState: function ( src ) { |
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var hash = src.split( '?' )[1]; |
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// Ensure we don't call pushState if the user hit the forward button. |
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if ( $.support.history && window.location.href !== src ) { |
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history.pushState( { customize: src }, '', src ); |
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} else if ( ! $.support.history && $.support.hashchange && hash ) { |
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window.location.hash = 'wp_customize=on&' + hash; |
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} |
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this.trigger( 'open' ); |
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}, |
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/** |
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* Callback after the Customizer has been opened. |
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*/ |
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opened: function() { |
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Loader.body.addClass( 'customize-active full-overlay-active' ); |
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}, |
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/** |
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* Close the Customizer overlay and return focus to the link that opened it. |
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*/ |
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close: function() { |
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if ( ! this.active ) { |
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return; |
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} |
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// Display AYS dialog if Customizer is dirty |
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if ( ! this.saved() && ! confirm( Loader.settings.l10n.saveAlert ) ) { |
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// Go forward since Customizer is exited by history.back() |
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history.forward(); |
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return; |
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} |
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this.active = false; |
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this.trigger( 'close' ); |
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// Restore document title prior to opening the Live Preview |
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if ( this.originalDocumentTitle ) { |
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document.title = this.originalDocumentTitle; |
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} |
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// Return focus to link that was originally clicked. |
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if ( this.link ) { |
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this.link.focus(); |
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} |
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}, |
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/** |
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* Callback after the Customizer has been closed. |
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*/ |
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closed: function() { |
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Loader.iframe.remove(); |
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Loader.messenger.destroy(); |
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Loader.iframe = null; |
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Loader.messenger = null; |
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Loader.saved = null; |
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Loader.body.removeClass( 'customize-active full-overlay-active' ).removeClass( 'customize-loading' ); |
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$( window ).off( 'beforeunload', Loader.beforeunload ); |
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}, |
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/** |
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* Callback for the `load` event on the Customizer iframe. |
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*/ |
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loaded: function() { |
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Loader.body.removeClass('customize-loading'); |
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}, |
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/** |
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* Overlay hide/show utility methods. |
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*/ |
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overlay: { |
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show: function() { |
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this.element.fadeIn( 200, Loader.opened ); |
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}, |
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hide: function() { |
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this.element.fadeOut( 200, Loader.closed ); |
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} |
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} |
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}); |
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// Bootstrap the Loader on document#ready. |
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$( function() { |
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Loader.settings = _wpCustomizeLoaderSettings; |
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Loader.initialize(); |
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}); |
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// Expose the API publicly on window.wp.customize.Loader |
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api.Loader = Loader; |
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})( wp, jQuery ); |