Stop hit testing culled inlines when a match is found

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
  * License as published by the Free Software Foundation; either
@@ skipping 1637 matching lines @@
         overflowBox.moveBy(adjustedLocation);
         if (!locationInContainer.intersects(overflowBox))
             return false;
     }
 
     if ((hitTestAction == HitTestBlockBackground || hitTestAction == HitTestChildBlockBackground)
         && visibleToHitTestRequest(result.hitTestRequest())
         && isPointInOverflowControl(result, locationInContainer.point(), adjustedLocation)) {
         updateHitTestResult(result, locationInContainer.point() - localOffset);
         // FIXME: isPointInOverflowControl() doesn't handle rect-based tests yet.
-        if (!result.addNodeToListBasedTestResult(nodeForHitTest(), locationInContainer))
+        if (result.addNodeToListBasedTestResult(nodeForHitTest(), locationInContainer) == StopHitTesting)
             return true;
     }
 
     // TODO(pdr): We should also include checks for hit testing border radius at
     //            the layer level (see: crbug.com/568904).
 
     if (hitTestChildren(result, locationInContainer, adjustedLocation, hitTestAction))
         return true;
 
     if (hitTestClippedOutByRoundedBorder(locationInContainer, adjustedLocation))
         return false;
 
     // Now hit test our background
     if (hitTestAction == HitTestBlockBackground || hitTestAction == HitTestChildBlockBackground) {
         LayoutRect boundsRect(adjustedLocation, size());
         if (visibleToHitTestRequest(result.hitTestRequest()) && locationInContainer.intersects(boundsRect)) {
             updateHitTestResult(result, flipForWritingMode(locationInContainer.point() - localOffset));
-            if (!result.addNodeToListBasedTestResult(nodeForHitTest(), locationInContainer, boundsRect))
+            if (result.addNodeToListBasedTestResult(nodeForHitTest(), locationInContainer, boundsRect) == StopHitTesting)
                 return true;
         }
     }
 
     return false;
 }
 
 bool LayoutBlock::hitTestChildren(HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction)
 {
     // TODO(pdr): We should also check for css clip in the !isSelfPaintingLayer
@@ skipping 1209 matching lines @@
 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const LayoutObject* obj) const
 {
     showLayoutObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink