Ticket #3173: 3173.patch

_source/core/editor.js

@@ -74 +74 @@
                 // Setup the lister for the "customConfigLoaded" event.
                 editor.on( 'customConfigLoaded', function()
                         {
-                                // Overwrite the settings from the in-page config.
                                 if ( instanceConfig )
+                                {
+                                        // Register the events that may have been set at the instance
+                                        // configuration object.
+                                        if ( instanceConfig.on )
+                                        {
+                                                for ( var eventName in instanceConfig.on )
+                                                {
+                                                        editor.on( eventName, instanceConfig.on[ eventName ] );
+                                                }
+                                        }
+
+                                        // Overwrite the settings from the in-page config.
                                         CKEDITOR.tools.extend( editor.config, instanceConfig, true );
 
+                                        delete editor.config.on;
+                                }
+
                                 onConfigLoaded( editor );
                         });