resourceloader: Implement mwLoadEnd marker

Complements mwLoadStart in startup.js.

Change-Id: Ic0b1fb64ee7cd72eea6d6faebdedf0def50ad4fd

diff --git a/resources/src/mediawiki/mediawiki.js b/resources/src/mediawiki/mediawiki.js
index a73accf..4e5aae9 100644 (file)
--- a/resources/src/mediawiki/mediawiki.js
+++ b/resources/src/mediawiki/mediawiki.js
@@ -2532,10 +2532,33 @@
                }
        }
 
-       // subscribe to error streams
+       // Subscribe to error streams
        mw.trackSubscribe( 'resourceloader.exception', log );
        mw.trackSubscribe( 'resourceloader.assert', log );
 
+       /**
+        * Fired when all modules associated with the page have finished loading.
+        *
+        * @event resourceloader_loadEnd
+        * @member mw.hook
+        */
+       $( function () {
+               var loading = $.grep( mw.loader.getModuleNames(), function ( module ) {
+                       return mw.loader.getState( module ) === 'loading';
+               } );
+               // In order to use jQuery.when (which stops early if one of the promises got rejected)
+               // cast any loading failures into successes. We only need a callback, not the module.
+               loading = $.map( loading, function ( module ) {
+                       return mw.loader.using( module ).then( null, function () {
+                               return $.Deferred().resolve();
+                       } );
+               } );
+               $.when.apply( $, loading ).then( function () {
+                       performance.mark( 'mwLoadEnd' );
+                       mw.hook( 'resourceloader.loadEnd' ).fire();
+               } );
+       } );
+
        // Attach to window and globally alias
        window.mw = window.mediaWiki = mw;
 }( jQuery ) );