/*

 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)

 *           (C) 2000 Antti Koivisto (koivisto@kde.org)

 *           (C) 2000 Dirk Mueller (mueller@kde.org)

 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.

 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)

 *

 * 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 FillLayer_h

#define FillLayer_h

#include "GraphicsTypes.h"

#include "Length.h"

#include "LengthSize.h"

#include "RenderStyleConstants.h"

#include "StyleImage.h"

#include <wtf/RefPtr.h>

namespace WebCore {

struct FillSize {

    FillSize()

        : type(SizeLength)

    {

    }

    FillSize(EFillSizeType t, LengthSize l)

        : type(t)

        , size(l)

    {

    }

    bool operator==(const FillSize& o) const

    {

        return type == o.type && size == o.size;

    }

    bool operator!=(const FillSize& o) const

    {

        return !(*this == o);

    }

    EFillSizeType type;

    LengthSize size;

};

class FillLayer : public FastAllocBase {

public:

    FillLayer(EFillLayerType);

    ~FillLayer();

    StyleImage* image() const { return m_image.get(); }

    Length xPosition() const { return m_xPosition; }

    Length yPosition() const { return m_yPosition; }

    EFillAttachment attachment() const { return static_cast<EFillAttachment>(m_attachment); }

    EFillBox clip() const { return static_cast<EFillBox>(m_clip); }

    EFillBox origin() const { return static_cast<EFillBox>(m_origin); }

    EFillRepeat repeatX() const { return static_cast<EFillRepeat>(m_repeatX); }

    EFillRepeat repeatY() const { return static_cast<EFillRepeat>(m_repeatY); }

    CompositeOperator composite() const { return static_cast<CompositeOperator>(m_composite); }

    LengthSize sizeLength() const { return m_sizeLength; }

    EFillSizeType sizeType() const { return static_cast<EFillSizeType>(m_sizeType); }

    FillSize size() const { return FillSize(static_cast<EFillSizeType>(m_sizeType), m_sizeLength); }

    const FillLayer* next() const { return m_next; }

    FillLayer* next() { return m_next; }

    bool isImageSet() const { return m_imageSet; }

    bool isXPositionSet() const { return m_xPosSet; }

    bool isYPositionSet() const { return m_yPosSet; }

    bool isAttachmentSet() const { return m_attachmentSet; }

    bool isClipSet() const { return m_clipSet; }

    bool isOriginSet() const { return m_originSet; }

    bool isRepeatXSet() const { return m_repeatXSet; }

    bool isRepeatYSet() const { return m_repeatYSet; }

    bool isCompositeSet() const { return m_compositeSet; }

    bool isSizeSet() const { return m_sizeType != SizeNone; }

    void setImage(StyleImage* i) { m_image = i; m_imageSet = true; }

    void setXPosition(Length l) { m_xPosition = l; m_xPosSet = true; }

    void setYPosition(Length l) { m_yPosition = l; m_yPosSet = true; }

    void setAttachment(EFillAttachment attachment) { m_attachment = attachment; m_attachmentSet = true; }

    void setClip(EFillBox b) { m_clip = b; m_clipSet = true; }

    void setOrigin(EFillBox b) { m_origin = b; m_originSet = true; }

    void setRepeatX(EFillRepeat r) { m_repeatX = r; m_repeatXSet = true; }

    void setRepeatY(EFillRepeat r) { m_repeatY = r; m_repeatYSet = true; }

    void setComposite(CompositeOperator c) { m_composite = c; m_compositeSet = true; }

    void setSizeType(EFillSizeType b) { m_sizeType = b; }

    void setSizeLength(LengthSize l) { m_sizeLength = l; }

    void setSize(FillSize f) { m_sizeType = f.type; m_sizeLength = f.size; }

    void clearImage() { m_imageSet = false; }

    void clearXPosition() { m_xPosSet = false; }

    void clearYPosition() { m_yPosSet = false; }

    void clearAttachment() { m_attachmentSet = false; }

    void clearClip() { m_clipSet = false; }

    void clearOrigin() { m_originSet = false; }

    void clearRepeatX() { m_repeatXSet = false; }

    void clearRepeatY() { m_repeatYSet = false; }

    void clearComposite() { m_compositeSet = false; }

    void clearSize() { m_sizeType = SizeNone; }

    void setNext(FillLayer* n) { if (m_next != n) { delete m_next; m_next = n; } }

    FillLayer& operator=(const FillLayer& o);    

    FillLayer(const FillLayer& o);

    bool operator==(const FillLayer& o) const;

    bool operator!=(const FillLayer& o) const

    {

        return !(*this == o);

    }

    bool containsImage(StyleImage*) const;

    bool imagesAreLoaded() const;

    bool hasImage() const

    {

        if (m_image)

            return true;

        return m_next ? m_next->hasImage() : false;

    }

    bool hasFixedImage() const

    {

        if (m_image && m_attachment == FixedBackgroundAttachment)

            return true;

        return m_next ? m_next->hasFixedImage() : false;

    }

    EFillLayerType type() const { return static_cast<EFillLayerType>(m_type); }

    void fillUnsetProperties();

    void cullEmptyLayers();

    static EFillAttachment initialFillAttachment(EFillLayerType) { return ScrollBackgroundAttachment; }

    static EFillBox initialFillClip(EFillLayerType) { return BorderFillBox; }

    static EFillBox initialFillOrigin(EFillLayerType type) { return type == BackgroundFillLayer ? PaddingFillBox : BorderFillBox; }

    static EFillRepeat initialFillRepeatX(EFillLayerType) { return RepeatFill; }

    static EFillRepeat initialFillRepeatY(EFillLayerType) { return RepeatFill; }

    static CompositeOperator initialFillComposite(EFillLayerType) { return CompositeSourceOver; }

    static EFillSizeType initialFillSizeType(EFillLayerType) { return SizeLength; }

    static LengthSize initialFillSizeLength(EFillLayerType) { return LengthSize(); }

    static FillSize initialFillSize(EFillLayerType) { return FillSize(); }

    static Length initialFillXPosition(EFillLayerType) { return Length(0.0, Percent); }

    static Length initialFillYPosition(EFillLayerType) { return Length(0.0, Percent); }

    static StyleImage* initialFillImage(EFillLayerType) { return 0; }

private:

    friend class RenderStyle;

    FillLayer() { }

    FillLayer* m_next;

    RefPtr<StyleImage> m_image;

    Length m_xPosition;

    Length m_yPosition;

    unsigned m_attachment : 2; // EFillAttachment

    unsigned m_clip : 2; // EFillBox

    unsigned m_origin : 2; // EFillBox

    unsigned m_repeatX : 3; // EFillRepeat

    unsigned m_repeatY : 3; // EFillRepeat

    unsigned m_composite : 4; // CompositeOperator

    unsigned m_sizeType : 2; // EFillSizeType

    LengthSize m_sizeLength;

    bool m_imageSet : 1;

    bool m_attachmentSet : 1;

    bool m_clipSet : 1;

    bool m_originSet : 1;

    bool m_repeatXSet : 1;

    bool m_repeatYSet : 1;

    bool m_xPosSet : 1;

    bool m_yPosSet : 1;

    bool m_compositeSet : 1;

    unsigned m_type : 1; // EFillLayerType

};

} // namespace WebCore

#endif // FillLayer_h