Ticket #8821: 8821.patch

_source/plugins/wysiwygarea/plugin.js

@@ -779 +779 @@
                                                         {
                                                                 if ( CKEDITOR.env.gecko )
                                                                 {
-                                                                        var scroll = domWindow.getScrollPosition();
+                                                                        var body = domDocument.getBody();
+
                                                                         // Page up/down cause editor selection to leak
                                                                         // outside of editable thus we try to intercept
                                                                         // the behavior, while it affects only happen
                                                                         // when editor contents are not overflowed. (#7955)
-                                                                        if ( !scroll.y )
+                                                                        if ( domWindow.$.innerHeight > body.$.offsetHeight )
                                                                         {
-                                                                                var body = domDocument.getBody();
                                                                                 range = new CKEDITOR.dom.range( domDocument );
                                                                                 range[ keyCode == 33 ? 'moveToElementEditStart' : 'moveToElementEditEnd']( body );
                                                                                 range.select();