Ticket #6166: 6166.patch

_source/plugins/maximize/plugin.js

@@ -287 +287 @@
 
                                                 // Toggle button label.
                                                 var button = this.uiItems[ 0 ];
-                                                var label = ( this.state == CKEDITOR.TRISTATE_OFF )
-                                                        ? lang.maximize : lang.minimize;
-                                                var buttonNode = editor.element.getDocument().getById( button._.id );
-                                                buttonNode.getChild( 1 ).setHtml( label );
-                                                buttonNode.setAttribute( 'title', label );
-                                                buttonNode.setAttribute( 'href', 'javascript:void("' + label + '");' );
+                                                // Only try to change the button if it exists (#6166)
+                                                if( button )
+                                                {
+                                                        var label = ( this.state == CKEDITOR.TRISTATE_OFF )
+                                                                ? lang.maximize : lang.minimize;
+                                                        var buttonNode = editor.element.getDocument().getById( button._.id );
+                                                        buttonNode.getChild( 1 ).setHtml( label );
+                                                        buttonNode.setAttribute( 'title', label );
+                                                        buttonNode.setAttribute( 'href', 'javascript:void("' + label + '");' );
+                                                }
 
                                                 // Restore selection and scroll position in editing area.
                                                 if ( editor.mode == 'wysiwyg' )