/*

 * 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 RenderSVGResource_h

#define RenderSVGResource_h

#if ENABLE(SVG)

#include "SVGDocumentExtensions.h"

namespace WebCore {

enum RenderSVGResourceType {

    MaskerResourceType,

    MarkerResourceType,

    PatternResourceType,

    LinearGradientResourceType,

    RadialGradientResourceType,

    SolidColorResourceType,

    FilterResourceType,

    ClipperResourceType

};

enum RenderSVGResourceMode {

    ApplyToDefaultMode = 1 << 0, // used for all resources except gradient/pattern

    ApplyToFillMode    = 1 << 1,

    ApplyToStrokeMode  = 1 << 2,

    ApplyToTextMode    = 1 << 3 // used in combination with ApplyTo{Fill|Stroke}Mode

};

class Color;

class FloatRect;

class GraphicsContext;

class RenderObject;

class RenderStyle;

class RenderSVGResourceSolidColor;

class RenderSVGResource {

public:

    RenderSVGResource() { }

    virtual ~RenderSVGResource() { }

    virtual void invalidateClients() = 0;

    virtual void invalidateClient(RenderObject*) = 0;

    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) = 0;

    virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short) { }

    virtual FloatRect resourceBoundingBox(RenderObject*) = 0;

    virtual RenderSVGResourceType resourceType() const = 0;

    template<class Renderer>

    Renderer* cast()

    {

        if (Renderer::s_resourceType == resourceType())

            return static_cast<Renderer*>(this);

        return 0;

    }

    // Helper utilities used in the render tree to access resources used for painting shapes/text (gradients & patterns only)

    static RenderSVGResource* fillPaintingResource(const RenderObject*, const RenderStyle*);

    static RenderSVGResource* strokePaintingResource(const RenderObject*, const RenderStyle*);

    static RenderSVGResourceSolidColor* sharedSolidPaintingResource();

    static void invalidateAllResourcesOfRenderer(RenderObject*);

    static void markForLayoutAndParentResourceInvalidation(RenderObject*, bool needsLayout = true);

private:

    static void adjustColorForPseudoRules(const RenderStyle*, bool useFillPaint, Color&);

protected:

    void markForLayoutAndResourceInvalidation(RenderObject*, bool needsBoundariesUpdate = true);

};

}

#endif

#endif