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diff --git a/Source/WebCore/rendering/svg/SVGTextQuery.h b/Source/WebCore/rendering/svg/SVGTextQuery.h
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+++ b/Source/WebCore/rendering/svg/SVGTextQuery.h
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+/*
+    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
+    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 SVGTextQuery_h
+#define SVGTextQuery_h
+
+#if ENABLE(SVG)
+#include "FloatRect.h"
+#include "SVGTextFragment.h"
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class InlineFlowBox;
+class RenderObject;
+class SVGInlineTextBox;
+
+class SVGTextQuery {
+public:
+    SVGTextQuery(RenderObject*);
+
+    unsigned numberOfCharacters() const;
+    float textLength() const;
+    float subStringLength(unsigned startPosition, unsigned length) const;
+    FloatPoint startPositionOfCharacter(unsigned position) const;
+    FloatPoint endPositionOfCharacter(unsigned position) const;
+    float rotationOfCharacter(unsigned position) const;
+    FloatRect extentOfCharacter(unsigned position) const;
+    int characterNumberAtPosition(const FloatPoint&) const;
+
+    // Public helper struct. Private classes in SVGTextQuery inherit from it.
+    struct Data;
+
+private:
+    typedef bool (SVGTextQuery::*ProcessTextFragmentCallback)(Data*, const SVGTextFragment&) const;
+    bool executeQuery(Data*, ProcessTextFragmentCallback) const;
+
+    void collectTextBoxesInFlowBox(InlineFlowBox*);
+    bool mapStartEndPositionsIntoFragmentCoordinates(Data*, const SVGTextFragment&, int& startPosition, int& endPosition) const;
+    void modifyStartEndPositionsRespectingLigatures(Data*, int& startPosition, int& endPosition) const;
+
+private:
+    bool numberOfCharactersCallback(Data*, const SVGTextFragment&) const;
+    bool textLengthCallback(Data*, const SVGTextFragment&) const;
+    bool subStringLengthCallback(Data*, const SVGTextFragment&) const;
+    bool startPositionOfCharacterCallback(Data*, const SVGTextFragment&) const;
+    bool endPositionOfCharacterCallback(Data*, const SVGTextFragment&) const;
+    bool rotationOfCharacterCallback(Data*, const SVGTextFragment&) const;
+    bool extentOfCharacterCallback(Data*, const SVGTextFragment&) const;
+    bool characterNumberAtPositionCallback(Data*, const SVGTextFragment&) const;
+
+private:
+    Vector<SVGInlineTextBox*> m_textBoxes;
+};
+
+}
+
+#endif
+#endif