1 window.wp = window.wp || {};

     2 

     3 (function( exports, $ ){

     4 	var api = wp.customize,

     5 		Loader;

     6 

     7 	$.extend( $.support, {

     8 		history: !! ( window.history && history.pushState ),

     9 		hashchange: ('onhashchange' in window) && (document.documentMode === undefined || document.documentMode > 7)

    10 	});

    11 

    12 	Loader = $.extend( {}, api.Events, {

    13 		initialize: function() {

    14 			this.body = $( document.body );

    15 

    16 			// Ensure the loader is supported.

    17 			// Check for settings, postMessage support, and whether we require CORS support.

    18 			if ( ! Loader.settings || ! $.support.postMessage || ( ! $.support.cors && Loader.settings.isCrossDomain ) ) {

    19 				return;

    20 			}

    21 

    22 			this.window  = $( window );

    23 			this.element = $( '<div id="customize-container" />' ).appendTo( this.body );

    24 

    25 			this.bind( 'open', this.overlay.show );

    26 			this.bind( 'close', this.overlay.hide );

    27 

    28 			$('#wpbody').on( 'click', '.load-customize', function( event ) {

    29 				event.preventDefault();

    30 

    31 				// Store a reference to the link that opened the customizer.

    32 				Loader.link = $(this);

    33 				// Load the theme.

    34 				Loader.open( Loader.link.attr('href') );

    35 			});

    36 

    37 			// Add navigation listeners.

    38 			if ( $.support.history )

    39 				this.window.on( 'popstate', Loader.popstate );

    40 

    41 			if ( $.support.hashchange ) {

    42 				this.window.on( 'hashchange', Loader.hashchange );

    43 				this.window.triggerHandler( 'hashchange' );

    44 			}

    45 		},

    46 

    47 		popstate: function( e ) {

    48 			var state = e.originalEvent.state;

    49 			if ( state && state.customize )

    50 				Loader.open( state.customize );

    51 			else if ( Loader.active )

    52 				Loader.close();

    53 		},

    54 

    55 		hashchange: function( e ) {

    56 			var hash = window.location.toString().split('#')[1];

    57 

    58 			if ( hash && 0 === hash.indexOf( 'wp_customize=on' ) )

    59 				Loader.open( Loader.settings.url + '?' + hash );

    60 

    61 			if ( ! hash && ! $.support.history )

    62 				Loader.close();

    63 		},

    64 

    65 		open: function( src ) {

    66 			var hash;

    67 

    68 			if ( this.active )

    69 				return;

    70 

    71 			// Load the full page on mobile devices.

    72 			if ( Loader.settings.browser.mobile )

    73 				return window.location = src;

    74 

    75 			this.active = true;

    76 			this.body.addClass('customize-loading');

    77 

    78 			this.iframe = $( '<iframe />', { src: src }).appendTo( this.element );

    79 			this.iframe.one( 'load', this.loaded );

    80 

    81 			// Create a postMessage connection with the iframe.

    82 			this.messenger = new api.Messenger({

    83 				url: src,

    84 				channel: 'loader',

    85 				targetWindow: this.iframe[0].contentWindow

    86 			});

    87 

    88 			// Wait for the connection from the iframe before sending any postMessage events.

    89 			this.messenger.bind( 'ready', function() {

    90 				Loader.messenger.send( 'back' );

    91 			});

    92 

    93 			this.messenger.bind( 'close', function() {

    94 				if ( $.support.history )

    95 					history.back();

    96 				else if ( $.support.hashchange )

    97 					window.location.hash = '';

    98 				else

    99 					Loader.close();

   100 			});

   101 

   102 			this.messenger.bind( 'activated', function( location ) {

   103 				if ( location )

   104 					window.location = location;

   105 			});

   106 

   107 			hash = src.split('?')[1];

   108 

   109 			// Ensure we don't call pushState if the user hit the forward button.

   110 			if ( $.support.history && window.location.href !== src )

   111 				history.pushState( { customize: src }, '', src );

   112 			else if ( ! $.support.history && $.support.hashchange && hash )

   113 				window.location.hash = 'wp_customize=on&' + hash;

   114 

   115 			this.trigger( 'open' );

   116 		},

   117 

   118 		opened: function() {

   119 			Loader.body.addClass( 'customize-active full-overlay-active' );

   120 		},

   121 

   122 		close: function() {

   123 			if ( ! this.active )

   124 				return;

   125 			this.active = false;

   126 

   127 			this.trigger( 'close' );

   128 

   129 			// Return focus to link that was originally clicked.

   130 			if ( this.link )

   131 				this.link.focus();

   132 		},

   133 

   134 		closed: function() {

   135 			Loader.iframe.remove();

   136 			Loader.messenger.destroy();

   137 			Loader.iframe    = null;

   138 			Loader.messenger = null;

   139 			Loader.body.removeClass( 'customize-active full-overlay-active' ).removeClass( 'customize-loading' );

   140 		},

   141 

   142 		loaded: function() {

   143 			Loader.body.removeClass('customize-loading');

   144 		},

   145 

   146 		overlay: {

   147 			show: function() {

   148 				this.element.fadeIn( 200, Loader.opened );

   149 			},

   150 

   151 			hide: function() {

   152 				this.element.fadeOut( 200, Loader.closed );

   153 			}

   154 		}

   155 	});

   156 

   157 	$( function() {

   158 		Loader.settings = _wpCustomizeLoaderSettings;

   159 		Loader.initialize();

   160 	});

   161 

   162 	// Expose the API to the world.

   163 	api.Loader = Loader;

   164 })( wp, jQuery );