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      1 /*
      2  * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2000 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
      6  * Copyright (C) 2006 Graham Dennis (graham.dennis (at) gmail.com)
      7  *
      8  * This library is free software; you can redistribute it and/or
      9  * modify it under the terms of the GNU Library General Public
     10  * License as published by the Free Software Foundation; either
     11  * version 2 of the License, or (at your option) any later version.
     12  *
     13  * This library is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     16  * Library General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU Library General Public License
     19  * along with this library; see the file COPYING.LIB.  If not, write to
     20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     21  * Boston, MA 02110-1301, USA.
     22  *
     23  */
     24 
     25 #ifndef FillLayer_h
     26 #define FillLayer_h
     27 
     28 #include "GraphicsTypes.h"
     29 #include "Length.h"
     30 #include "LengthSize.h"
     31 #include "RenderStyleConstants.h"
     32 #include "StyleImage.h"
     33 #include <wtf/RefPtr.h>
     34 
     35 namespace WebCore {
     36 
     37 struct FillSize {
     38     FillSize()
     39         : type(SizeLength)
     40     {
     41     }
     42 
     43     FillSize(EFillSizeType t, LengthSize l)
     44         : type(t)
     45         , size(l)
     46     {
     47     }
     48 
     49     bool operator==(const FillSize& o) const
     50     {
     51         return type == o.type && size == o.size;
     52     }
     53     bool operator!=(const FillSize& o) const
     54     {
     55         return !(*this == o);
     56     }
     57 
     58     EFillSizeType type;
     59     LengthSize size;
     60 };
     61 
     62 class FillLayer {
     63     WTF_MAKE_FAST_ALLOCATED;
     64 public:
     65     FillLayer(EFillLayerType);
     66     ~FillLayer();
     67 
     68     StyleImage* image() const { return m_image.get(); }
     69     Length xPosition() const { return m_xPosition; }
     70     Length yPosition() const { return m_yPosition; }
     71     EFillAttachment attachment() const { return static_cast<EFillAttachment>(m_attachment); }
     72     EFillBox clip() const { return static_cast<EFillBox>(m_clip); }
     73     EFillBox origin() const { return static_cast<EFillBox>(m_origin); }
     74     EFillRepeat repeatX() const { return static_cast<EFillRepeat>(m_repeatX); }
     75     EFillRepeat repeatY() const { return static_cast<EFillRepeat>(m_repeatY); }
     76     CompositeOperator composite() const { return static_cast<CompositeOperator>(m_composite); }
     77     LengthSize sizeLength() const { return m_sizeLength; }
     78     EFillSizeType sizeType() const { return static_cast<EFillSizeType>(m_sizeType); }
     79     FillSize size() const { return FillSize(static_cast<EFillSizeType>(m_sizeType), m_sizeLength); }
     80 
     81     const FillLayer* next() const { return m_next; }
     82     FillLayer* next() { return m_next; }
     83 
     84     bool isImageSet() const { return m_imageSet; }
     85     bool isXPositionSet() const { return m_xPosSet; }
     86     bool isYPositionSet() const { return m_yPosSet; }
     87     bool isAttachmentSet() const { return m_attachmentSet; }
     88     bool isClipSet() const { return m_clipSet; }
     89     bool isOriginSet() const { return m_originSet; }
     90     bool isRepeatXSet() const { return m_repeatXSet; }
     91     bool isRepeatYSet() const { return m_repeatYSet; }
     92     bool isCompositeSet() const { return m_compositeSet; }
     93     bool isSizeSet() const { return m_sizeType != SizeNone; }
     94 
     95     void setImage(StyleImage* i) { m_image = i; m_imageSet = true; }
     96     void setXPosition(Length l) { m_xPosition = l; m_xPosSet = true; }
     97     void setYPosition(Length l) { m_yPosition = l; m_yPosSet = true; }
     98     void setAttachment(EFillAttachment attachment) { m_attachment = attachment; m_attachmentSet = true; }
     99     void setClip(EFillBox b) { m_clip = b; m_clipSet = true; }
    100     void setOrigin(EFillBox b) { m_origin = b; m_originSet = true; }
    101     void setRepeatX(EFillRepeat r) { m_repeatX = r; m_repeatXSet = true; }
    102     void setRepeatY(EFillRepeat r) { m_repeatY = r; m_repeatYSet = true; }
    103     void setComposite(CompositeOperator c) { m_composite = c; m_compositeSet = true; }
    104     void setSizeType(EFillSizeType b) { m_sizeType = b; }
    105     void setSizeLength(LengthSize l) { m_sizeLength = l; }
    106     void setSize(FillSize f) { m_sizeType = f.type; m_sizeLength = f.size; }
    107 
    108     void clearImage() { m_imageSet = false; }
    109     void clearXPosition() { m_xPosSet = false; }
    110     void clearYPosition() { m_yPosSet = false; }
    111     void clearAttachment() { m_attachmentSet = false; }
    112     void clearClip() { m_clipSet = false; }
    113     void clearOrigin() { m_originSet = false; }
    114     void clearRepeatX() { m_repeatXSet = false; }
    115     void clearRepeatY() { m_repeatYSet = false; }
    116     void clearComposite() { m_compositeSet = false; }
    117     void clearSize() { m_sizeType = SizeNone; }
    118 
    119     void setNext(FillLayer* n) { if (m_next != n) { delete m_next; m_next = n; } }
    120 
    121     FillLayer& operator=(const FillLayer& o);
    122     FillLayer(const FillLayer& o);
    123 
    124     bool operator==(const FillLayer& o) const;
    125     bool operator!=(const FillLayer& o) const
    126     {
    127         return !(*this == o);
    128     }
    129 
    130     bool containsImage(StyleImage*) const;
    131     bool imagesAreLoaded() const;
    132 
    133     bool hasImage() const
    134     {
    135         if (m_image)
    136             return true;
    137         return m_next ? m_next->hasImage() : false;
    138     }
    139 
    140     bool hasFixedImage() const
    141     {
    142         if (m_image && m_attachment == FixedBackgroundAttachment)
    143             return true;
    144         return m_next ? m_next->hasFixedImage() : false;
    145     }
    146 
    147     EFillLayerType type() const { return static_cast<EFillLayerType>(m_type); }
    148 
    149     void fillUnsetProperties();
    150     void cullEmptyLayers();
    151 
    152     static EFillAttachment initialFillAttachment(EFillLayerType) { return ScrollBackgroundAttachment; }
    153     static EFillBox initialFillClip(EFillLayerType) { return BorderFillBox; }
    154     static EFillBox initialFillOrigin(EFillLayerType type) { return type == BackgroundFillLayer ? PaddingFillBox : BorderFillBox; }
    155     static EFillRepeat initialFillRepeatX(EFillLayerType) { return RepeatFill; }
    156     static EFillRepeat initialFillRepeatY(EFillLayerType) { return RepeatFill; }
    157     static CompositeOperator initialFillComposite(EFillLayerType) { return CompositeSourceOver; }
    158     static EFillSizeType initialFillSizeType(EFillLayerType) { return SizeLength; }
    159     static LengthSize initialFillSizeLength(EFillLayerType) { return LengthSize(); }
    160     static FillSize initialFillSize(EFillLayerType) { return FillSize(); }
    161     static Length initialFillXPosition(EFillLayerType) { return Length(0.0, Percent); }
    162     static Length initialFillYPosition(EFillLayerType) { return Length(0.0, Percent); }
    163     static StyleImage* initialFillImage(EFillLayerType) { return 0; }
    164 
    165 private:
    166     friend class RenderStyle;
    167 
    168     FillLayer() { }
    169 
    170     FillLayer* m_next;
    171 
    172     RefPtr<StyleImage> m_image;
    173 
    174     Length m_xPosition;
    175     Length m_yPosition;
    176 
    177     unsigned m_attachment : 2; // EFillAttachment
    178     unsigned m_clip : 2; // EFillBox
    179     unsigned m_origin : 2; // EFillBox
    180     unsigned m_repeatX : 3; // EFillRepeat
    181     unsigned m_repeatY : 3; // EFillRepeat
    182     unsigned m_composite : 4; // CompositeOperator
    183     unsigned m_sizeType : 2; // EFillSizeType
    184 
    185     LengthSize m_sizeLength;
    186 
    187     bool m_imageSet : 1;
    188     bool m_attachmentSet : 1;
    189     bool m_clipSet : 1;
    190     bool m_originSet : 1;
    191     bool m_repeatXSet : 1;
    192     bool m_repeatYSet : 1;
    193     bool m_xPosSet : 1;
    194     bool m_yPosSet : 1;
    195     bool m_compositeSet : 1;
    196 
    197     unsigned m_type : 1; // EFillLayerType
    198 };
    199 
    200 } // namespace WebCore
    201 
    202 #endif // FillLayer_h
    203