Implement a Hit Test Cache.

Source/core/layout/svg/LayoutSVGContainer.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/layout/svg/LayoutSVGContainer.h"
 
+#include "core/layout/HitTestResult.h"
 #include "core/layout/LayoutAnalyzer.h"
 #include "core/layout/svg/SVGLayoutSupport.h"
 #include "core/layout/svg/SVGResources.h"
 #include "core/layout/svg/SVGResourcesCache.h"
 #include "core/paint/SVGContainerPainter.h"
 
 namespace blink {
 
 LayoutSVGContainer::LayoutSVGContainer(SVGElement* node)
     : LayoutSVGModelObject(node)
@@ skipping 130 matching lines @@
     // Give LayoutSVGViewportContainer a chance to apply its viewport clip
     if (!pointIsInsideViewportClip(pointInParent))
         return false;
 
     FloatPoint localPoint;
     if (!SVGLayoutSupport::transformToUserSpaceAndCheckClipping(this, localToParentTransform(), pointInParent, localPoint))
         return false;
 
     for (LayoutObject* child = lastChild(); child; child = child->previousSibling()) {
         if (child->nodeAtFloatPoint(result, localPoint, hitTestAction)) {
-            updateHitTestResult(result, roundedLayoutPoint(localPoint));
+            updateHitTestResult(result, roundedLayoutPoint(localPoint),
+                boundingRect(result.hitTestLocation().point()));
             return true;
         }
     }
 
     // pointer-events=boundingBox makes it possible for containers to be direct targets
     if (style()->pointerEvents() == PE_BOUNDINGBOX) {
         ASSERT(isObjectBoundingBoxValid());
         if (objectBoundingBox().contains(localPoint)) {
-            updateHitTestResult(result, roundedLayoutPoint(localPoint));
+            updateHitTestResult(result, roundedLayoutPoint(localPoint),
+                boundingRect(result.hitTestLocation().point()));
             return true;
         }
     }
     // 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched."
     return false;
 }
 
 }