wp-includes/js/customize-loader.js

   1 /* global _wpCustomizeLoaderSettings */
   2 window.wp = window.wp || {};
   3
   4 (function( exports, $ ){
   5         var api = wp.customize,
   6                 Loader;
   7
   8         $.extend( $.support, {
   9                 history: !! ( window.history && history.pushState ),
  10                 hashchange: ('onhashchange' in window) && (document.documentMode === undefined || document.documentMode > 7)
  11         });
  12
  13         Loader = $.extend( {}, api.Events, {
  14                 initialize: function() {
  15                         this.body = $( document.body );
  16
  17                         // Ensure the loader is supported.
  18                         // Check for settings, postMessage support, and whether we require CORS support.
  19                         if ( ! Loader.settings || ! $.support.postMessage || ( ! $.support.cors && Loader.settings.isCrossDomain ) ) {
  20                                 return;
  21                         }
  22
  23                         this.window  = $( window );
  24                         this.element = $( '<div id="customize-container" />' ).appendTo( this.body );
  25
  26                         this.bind( 'open', this.overlay.show );
  27                         this.bind( 'close', this.overlay.hide );
  28
  29                         $('#wpbody').on( 'click', '.load-customize', function( event ) {
  30                                 event.preventDefault();
  31
  32                                 // Store a reference to the link that opened the customizer.
  33                                 Loader.link = $(this);
  34                                 // Load the theme.
  35                                 Loader.open( Loader.link.attr('href') );
  36                         });
  37
  38                         // Add navigation listeners.
  39                         if ( $.support.history )
  40                                 this.window.on( 'popstate', Loader.popstate );
  41
  42                         if ( $.support.hashchange ) {
  43                                 this.window.on( 'hashchange', Loader.hashchange );
  44                                 this.window.triggerHandler( 'hashchange' );
  45                         }
  46                 },
  47
  48                 popstate: function( e ) {
  49                         var state = e.originalEvent.state;
  50                         if ( state && state.customize )
  51                                 Loader.open( state.customize );
  52                         else if ( Loader.active )
  53                                 Loader.close();
  54                 },
  55
  56                 hashchange: function() {
  57                         var hash = window.location.toString().split('#')[1];
  58
  59                         if ( hash && 0 === hash.indexOf( 'wp_customize=on' ) )
  60                                 Loader.open( Loader.settings.url + '?' + hash );
  61
  62                         if ( ! hash && ! $.support.history )
  63                                 Loader.close();
  64                 },
  65
  66                 open: function( src ) {
  67                         var hash;
  68
  69                         if ( this.active )
  70                                 return;
  71
  72                         // Load the full page on mobile devices.
  73                         if ( Loader.settings.browser.mobile )
  74                                 return window.location = src;
  75
  76                         this.active = true;
  77                         this.body.addClass('customize-loading');
  78
  79                         this.iframe = $( '<iframe />', { src: src }).appendTo( this.element );
  80                         this.iframe.one( 'load', this.loaded );
  81
  82                         // Create a postMessage connection with the iframe.
  83                         this.messenger = new api.Messenger({
  84                                 url: src,
  85                                 channel: 'loader',
  86                                 targetWindow: this.iframe[0].contentWindow
  87                         });
  88
  89                         // Wait for the connection from the iframe before sending any postMessage events.
  90                         this.messenger.bind( 'ready', function() {
  91                                 Loader.messenger.send( 'back' );
  92                         });
  93
  94                         this.messenger.bind( 'close', function() {
  95                                 if ( $.support.history )
  96                                         history.back();
  97                                 else if ( $.support.hashchange )
  98                                         window.location.hash = '';
  99                                 else
 100                                         Loader.close();
 101                         });
 102
 103                         this.messenger.bind( 'activated', function( location ) {
 104                                 if ( location )
 105                                         window.location = location;
 106                         });
 107
 108                         hash = src.split('?')[1];
 109
 110                         // Ensure we don't call pushState if the user hit the forward button.
 111                         if ( $.support.history && window.location.href !== src )
 112                                 history.pushState( { customize: src }, '', src );
 113                         else if ( ! $.support.history && $.support.hashchange && hash )
 114                                 window.location.hash = 'wp_customize=on&' + hash;
 115
 116                         this.trigger( 'open' );
 117                 },
 118
 119                 opened: function() {
 120                         Loader.body.addClass( 'customize-active full-overlay-active' );
 121                 },
 122
 123                 close: function() {
 124                         if ( ! this.active )
 125                                 return;
 126                         this.active = false;
 127
 128                         this.trigger( 'close' );
 129
 130                         // Return focus to link that was originally clicked.
 131                         if ( this.link )
 132                                 this.link.focus();
 133                 },
 134
 135                 closed: function() {
 136                         Loader.iframe.remove();
 137                         Loader.messenger.destroy();
 138                         Loader.iframe    = null;
 139                         Loader.messenger = null;
 140                         Loader.body.removeClass( 'customize-active full-overlay-active' ).removeClass( 'customize-loading' );
 141                 },
 142
 143                 loaded: function() {
 144                         Loader.body.removeClass('customize-loading');
 145                 },
 146
 147                 overlay: {
 148                         show: function() {
 149                                 this.element.fadeIn( 200, Loader.opened );
 150                         },
 151
 152                         hide: function() {
 153                                 this.element.fadeOut( 200, Loader.closed );
 154                         }
 155                 }
 156         });
 157
 158         $( function() {
 159                 Loader.settings = _wpCustomizeLoaderSettings;
 160                 Loader.initialize();
 161         });
 162
 163         // Expose the API to the world.
 164         api.Loader = Loader;
 165 })( wp, jQuery );