/*
    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
    aint 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 SVGResourcesCycleSolver_h
#define SVGResourcesCycleSolver_h

#if ENABLE(SVG)
#include <wtf/HashSet.h>

namespace WebCore {

class RenderObject;
class RenderSVGResourceContainer;
class SVGResources;

class SVGResourcesCycleSolver : public Noncopyable {
public:
    SVGResourcesCycleSolver(RenderObject*, SVGResources*);
    ~SVGResourcesCycleSolver();

    void resolveCycles();

private:
    bool resourceContainsCycles(RenderObject*) const;
    void breakCycle(RenderSVGResourceContainer*);

    RenderObject* m_renderer;
    SVGResources* m_resources;
    HashSet<RenderSVGResourceContainer*> m_allResources; 
};

}

#endif
#endif