Ticket #3795: 3795.patch

_source/core/dom/element.js

@@ -1223 +1223 @@
                         // Append the offsets for the entire element hierarchy.
                         var elementPosition = this.getDocumentPosition();
                         offset += elementPosition.y;
-                        // Scroll the window to the desired position, if not already visible.
-                        var currentScroll = win.getScrollPosition().y;
 
-                        // Though the computed offset value maybe out of range ( e.g.
-                        // a negative value ), browser will try to scroll as much as possible. (#3692)
-                        win.$.scrollTo( 0, offset > 0 ? offset : 0 );
+                        // offset value might be out of range(nagative), fix it(#3692).
+                        offset = offset < 0 ? 0 : offset;
+
+                        // Scroll the window to the desired position, if not already visible(#3795).
+                        var currentScroll = win.getScrollPosition().y;
+                        if ( offset > currentScroll || offset < currentScroll - winHeight )
+                                win.$.scrollTo( 0, offset );
                 },
 
                 setState : function( state )