Proposed Patch to fix scrolling on twitter and other similar sites

webkit-twitter-scroll.patch (text/plain), 1.52 KB, created by godmachine (Lance Poore) on 2011-09-28 01:30:39 UTC

Index: Source/WebCore/rendering/RenderLayer.cpp
===================================================================
--- third_party/WebKit/Source/WebCore/rendering/RenderLayer.cpp	(revision 95854)
+++ third_party/WebKit/Source/WebCore/rendering/RenderLayer.cpp	(working copy)
@@ -2656,7 +2656,7 @@ void RenderLayer::paintLayer(RenderLayer
         paintFlags |= PaintLayerHaveTransparency;
 
     // Apply a transform if we have one.  A reflection is considered to be a transform, since it is a flip and a translate.
-    if (paintsWithTransform(paintBehavior) && !(paintFlags & PaintLayerAppliedTransform)) {
+    if ((paintsWithTransform(paintBehavior) || (isStackingContext() && (renderer()->isPositioned() || renderer()->isRelPositioned()))) && !(paintFlags & PaintLayerAppliedTransform)) {
         TransformationMatrix layerTransform = renderableTransform(paintBehavior);
         // If the transform can't be inverted, then don't paint anything.
         if (!layerTransform.isInvertible())
@@ -3091,7 +3091,7 @@ RenderLayer* RenderLayer::hitTestLayer(R
     LayoutRect hitTestArea = result.rectForPoint(hitTestPoint);
 
     // Apply a transform if we have one.
-    if (transform() && !appliedTransform) {
+    if ((transform() || (isStackingContext() && (renderer()->isPositioned() || renderer()->isRelPositioned()))) && !appliedTransform) {
         // Make sure the parent's clip rects have been calculated.
         if (parent()) {
             ClipRect clipRect = backgroundClipRect(rootLayer, useTemporaryClipRects, IncludeOverlayScrollbarSize);