wp-includes/js/customize-loader.js

   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 );