Ticket #7955: 7955.patch

_source/plugins/wysiwygarea/plugin.js

@@ -778 +778 @@
                                                                         return;
                                                                 }
                                                         }
+
+                                                        // PageUp OR PageDown
+                                                        if ( keyCode == 33 || keyCode == 34 )
+                                                        {
+                                                                if ( CKEDITOR.env.gecko )
+                                                                {
+                                                                        var scroll = domWindow.getScrollPosition();
+                                                                        // 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 )
+                                                                        {
+                                                                                var body = domDocument.getBody();
+                                                                                range = new CKEDITOR.dom.range( domDocument );
+                                                                                range[ keyCode == 33 ? 'moveToElementEditStart' : 'moveToElementEditEnd']( body );
+                                                                                range.select();
+                                                                                evt.data.preventDefault();
+                                                                        }
+                                                                }
+
+                                                        }
                                                 } );
 
                                                 // PageUp/PageDown scrolling is broken in document