/*

 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef SVGResource_h

#define SVGResource_h

#if ENABLE(SVG)

#include "PlatformString.h"

#include "Shared.h"

#include "StringHash.h"

#include <wtf/HashMap.h>

#include <wtf/HashSet.h>

namespace WebCore {

    class AtomicString; 

    class Document;

    class RenderPath;

    class SVGDocumentExtensions;

    class SVGStyledElement;

    class TextStream;

    enum SVGResourceType {

        // Painting mode

        ClipperResourceType = 0,

        MarkerResourceType = 1,

        ImageResourceType = 2,

        FilterResourceType = 3,

        MaskerResourceType = 4

    };

    // The SVGResource file represent various graphics resources:

    // - Filter resource

    // - Clipper resource

    // - Masker resource

    // - Marker resource

    // - Pattern resource

    // - Linear/Radial gradient resource

    //

    // SVG creates/uses these resources.

    class SVGResource : public Shared<SVGResource> {

    public:

        SVGResource();

        virtual ~SVGResource();

        virtual void invalidate();

        void addClient(SVGStyledElement*);

        void repaintClients() const;

        static void repaintClients(HashSet<SVGStyledElement*>);

        virtual bool isPaintServer() const { return false; }

        virtual bool isFilter() const { return false; }

        virtual bool isClipper() const { return false; }

        virtual bool isMarker() const { return false; }

        virtual bool isMasker() const { return false; }

        virtual TextStream& externalRepresentation(TextStream&) const;

    private:

        HashSet<SVGStyledElement*> m_clients;

    };

    SVGResource* getResourceById(Document*, const AtomicString&);

    TextStream& operator<<(TextStream&, const SVGResource&);

} // namespace WebCore

#endif

#endif // SVGResource_h