Ticket #7946: 7946_3.patch

_source/core/dom/element.js

@@ -1430 +1430 @@
                         var currentScroll = win.getScrollPosition().y;
                         if ( offset > currentScroll || offset < currentScroll - winHeight )
                                 win.$.scrollTo( 0, offset );
+
+                        // Check whether the host page need to scroll too. (#7946)
+                        var doc = CKEDITOR.document;
+                        if ( !this.getDocument().equals( doc ) )
+                        {
+                                var rect = this.$.getBoundingClientRect(),
+                                        pos = this.getDocumentPosition( doc ),
+                                        marker = new CKEDITOR.dom.element( 'div', doc );
+
+                                // marker will of the same size of the current.
+                                marker.setStyles(
+                                {
+                                        position : 'absolute',
+                                        visibility : 'hidden',
+                                        left : pos.x + 'px',
+                                        top : pos.y + 'px',
+                                        width : ( rect.width || rect.right - rect.left ) + 'px',
+                                        height : ( rect.height || rect.top - rect.bottom ) + 'px'
+                                });
+                                doc.getBody().append( marker );
+
+                                rect = marker.$.getBoundingClientRect();
+                                winHeight = doc.getWindow().getViewPaneSize().height;
+
+                                // Scroll host page only when client rectangle is outside of viewport.
+                                if ( rect.bottom < 0 || rect.top > winHeight )
+                                        marker.$.scrollIntoView( alignTop );
+
+                                marker.remove();
+                        }
                 },
 
                 setState : function( state )