Implement Paint Containment

third_party/WebKit/Source/core/css/resolver/StyleAdjuster.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 181 matching lines @@
         || style.hasOpacity()
         || style.hasTransformRelatedProperty()
         || style.hasMask()
         || style.clipPath()
         || style.boxReflect()
         || style.hasFilter()
         || style.hasBlendMode()
         || style.hasIsolation()
         || style.position() == FixedPosition
         || isInTopLayer(element, style)
-        || hasWillChangeThatCreatesStackingContext(style)))
+        || hasWillChangeThatCreatesStackingContext(style)
+        || style.containsPaint()))

[chrishtr, 2015/12/09 01:41:46]

Does this work with inline elements?

[leviw_travelin_and_unemployed, 2015/12/09 21:09:24]

Yurp yurp yurp. But there were no tests, which is now addressed, so you can
finally rest.

         style.setZIndex(0);
 
     if (doesNotInheritTextDecoration(style, element))
         style.clearAppliedTextDecorations();
 
     style.applyTextDecorations();
 
     if (style.overflowX() != OVISIBLE || style.overflowY() != OVISIBLE)
         adjustOverflow(style);
 
@@ skipping 271 matching lines @@
         // We want to count vertical percentage paddings/margins on flex items because our current
         // behavior is different from the spec and we want to gather compatibility data.
         if (style.paddingBefore().hasPercent() || style.paddingAfter().hasPercent())
             UseCounter::count(document, UseCounter::FlexboxPercentagePaddingVertical);
         if (style.marginBefore().hasPercent() || style.marginAfter().hasPercent())
             UseCounter::count(document, UseCounter::FlexboxPercentageMarginVertical);
     }
 }
 
 }