Implement Paint Containment

third_party/WebKit/Source/core/layout/LayoutBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 4040 matching lines @@
 }
 
 static bool shouldBeConsideredAsReplaced(Node* node)
 {
     // Checkboxes and radioboxes are not isAtomicInlineLevel() nor do they have their own layoutObject in which to override avoidFloats().
     return node && node->isElementNode() && (toElement(node)->isFormControlElement() || isHTMLImageElement(toElement(node)));
 }
 
 bool LayoutBox::avoidsFloats() const
 {
-    return isAtomicInlineLevel() || shouldBeConsideredAsReplaced(node()) || hasOverflowClip() || isHR() || isLegend() || isWritingModeRoot() || isFlexItemIncludingDeprecated();
+    return isAtomicInlineLevel() || shouldBeConsideredAsReplaced(node()) || hasOverflowClip() || isHR() || isLegend() || isWritingModeRoot() || isFlexItemIncludingDeprecated() || style()->containsPaint();
 }
 
 bool LayoutBox::hasNonCompositedScrollbars() const
 {
     if (PaintLayer* layer = this->layer()) {
         if (PaintLayerScrollableArea* scrollableArea = layer->scrollableArea()) {
             if (scrollableArea->hasHorizontalScrollbar() && !scrollableArea->layerForHorizontalScrollbar())
                 return true;
             if (scrollableArea->hasVerticalScrollbar() && !scrollableArea->layerForVerticalScrollbar())
                 return true;
@@ skipping 841 matching lines @@
 }
 
 void LayoutBox::clearPreviousPaintInvalidationRects()
 {
     LayoutBoxModelObject::clearPreviousPaintInvalidationRects();
     if (PaintLayerScrollableArea* scrollableArea = this->scrollableArea())
         scrollableArea->clearPreviousPaintInvalidationRects();
 }
 
 } // namespace blink