--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/JSSVGContextCache.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,97 @@
+/*
+    Copyright (C) Research In Motion Limited 2009-2010. 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
+    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.
+*/
+
+#ifndef JSSVGContextCache_h
+#define JSSVGContextCache_h
+
+#if ENABLE(SVG)
+#include "SVGElement.h"
+#include <wtf/StdLibExtras.h>
+
+namespace WebCore {
+
+class DOMObject;
+
+class JSSVGContextCache : public Noncopyable {
+public:
+    typedef HashMap<DOMObject*, SVGElement*> WrapperMap;
+
+    static WrapperMap& wrapperMap()
+    {
+        DEFINE_STATIC_LOCAL(WrapperMap, s_wrapperMap, ());
+        return s_wrapperMap;
+    }
+
+    static void addWrapper(DOMObject* wrapper, SVGElement* context)
+    {
+        ASSERT(wrapper);
+        ASSERT(context);
+
+        pair<WrapperMap::iterator, bool> result = wrapperMap().add(wrapper, context);
+        if (result.second) {
+            WrapperMap::iterator& it = result.first;
+            ASSERT_UNUSED(it, it->second == context);
+        }
+    }
+
+    static void forgetWrapper(DOMObject* wrapper)
+    {
+        ASSERT(wrapper);
+
+        WrapperMap& map = wrapperMap();
+        WrapperMap::iterator it = map.find(wrapper);
+        if (it == map.end())
+            return;
+
+        map.remove(it);
+    }
+
+    static void propagateSVGDOMChange(DOMObject* wrapper, const QualifiedName& attributeName)
+    {
+        WrapperMap& map = wrapperMap();
+        WrapperMap::iterator it = map.find(wrapper);
+        if (it == map.end())
+            return;
+
+        SVGElement* context = it->second;
+        ASSERT(context);
+
+        context->svgAttributeChanged(attributeName);
+    }
+
+    static SVGElement* svgContextForDOMObject(DOMObject* wrapper)
+    {
+        ASSERT(wrapper);
+
+        WrapperMap& map = wrapperMap();
+        WrapperMap::iterator it = map.find(wrapper);
+        if (it == map.end())
+            return 0;
+
+        SVGElement* context = it->second;
+        ASSERT(context);
+        return context;
+    }
+
+};
+
+}
+
+#endif
+#endif