1/*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 * (C) 2000 Antti Koivisto (koivisto@kde.org)
4 * (C) 2000 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2014 Apple Inc. All rights reserved.
6 * Copyright (C) 2006 Graham Dennis (graham.dennis@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#pragma once
26
27#include "GraphicsTypes.h"
28#include "LengthSize.h"
29#include "RenderStyleConstants.h"
30#include "StyleImage.h"
31#include <wtf/RefPtr.h>
32
33namespace WebCore {
34
35class RenderElement;
36
37struct FillSize {
38 FillSize()
39 : type(FillSizeType::Size)
40 {
41 }
42
43 FillSize(FillSizeType type, const LengthSize& size)
44 : type(type)
45 , size(size)
46 {
47 }
48
49 FillSizeType type;
50 LengthSize size;
51};
52
53inline bool operator==(const FillSize& a, const FillSize& b)
54{
55 return a.type == b.type && a.size == b.size;
56}
57
58inline bool operator!=(const FillSize& a, const FillSize& b)
59{
60 return !(a == b);
61}
62
63class FillLayer {
64 WTF_MAKE_FAST_ALLOCATED;
65public:
66 explicit FillLayer(FillLayerType);
67 ~FillLayer();
68
69 StyleImage* image() const { return m_image.get(); }
70 const Length& xPosition() const { return m_xPosition; }
71 const Length& yPosition() const { return m_yPosition; }
72 Edge backgroundXOrigin() const { return static_cast<Edge>(m_backgroundXOrigin); }
73 Edge backgroundYOrigin() const { return static_cast<Edge>(m_backgroundYOrigin); }
74 FillAttachment attachment() const { return static_cast<FillAttachment>(m_attachment); }
75 FillBox clip() const { return static_cast<FillBox>(m_clip); }
76 FillBox origin() const { return static_cast<FillBox>(m_origin); }
77 FillRepeat repeatX() const { return static_cast<FillRepeat>(m_repeatX); }
78 FillRepeat repeatY() const { return static_cast<FillRepeat>(m_repeatY); }
79 CompositeOperator composite() const { return static_cast<CompositeOperator>(m_composite); }
80 BlendMode blendMode() const { return static_cast<BlendMode>(m_blendMode); }
81 const LengthSize& sizeLength() const { return m_sizeLength; }
82 FillSizeType sizeType() const { return static_cast<FillSizeType>(m_sizeType); }
83 FillSize size() const { return FillSize(static_cast<FillSizeType>(m_sizeType), m_sizeLength); }
84 MaskSourceType maskSourceType() const { return static_cast<MaskSourceType>(m_maskSourceType); }
85
86 const FillLayer* next() const { return m_next.get(); }
87 FillLayer* next() { return m_next.get(); }
88
89 bool isImageSet() const { return m_imageSet; }
90 bool isXPositionSet() const { return m_xPosSet; }
91 bool isYPositionSet() const { return m_yPosSet; }
92 bool isBackgroundXOriginSet() const { return m_backgroundXOriginSet; }
93 bool isBackgroundYOriginSet() const { return m_backgroundYOriginSet; }
94 bool isAttachmentSet() const { return m_attachmentSet; }
95 bool isClipSet() const { return m_clipSet; }
96 bool isOriginSet() const { return m_originSet; }
97 bool isRepeatXSet() const { return m_repeatXSet; }
98 bool isRepeatYSet() const { return m_repeatYSet; }
99 bool isCompositeSet() const { return m_compositeSet; }
100 bool isBlendModeSet() const { return m_blendModeSet; }
101 bool isSizeSet() const { return static_cast<FillSizeType>(m_sizeType) != FillSizeType::None; }
102 bool isMaskSourceTypeSet() const { return m_maskSourceTypeSet; }
103
104 bool isEmpty() const { return (sizeType() == FillSizeType::Size && m_sizeLength.isEmpty()) || sizeType() == FillSizeType::None; }
105
106 void setImage(RefPtr<StyleImage>&& image) { m_image = WTFMove(image); m_imageSet = true; }
107 void setXPosition(Length length) { m_xPosition = WTFMove(length); m_xPosSet = true; }
108 void setYPosition(Length length) { m_yPosition = WTFMove(length); m_yPosSet = true; }
109 void setBackgroundXOrigin(Edge o) { m_backgroundXOrigin = static_cast<unsigned>(o); m_backgroundXOriginSet = true; }
110 void setBackgroundYOrigin(Edge o) { m_backgroundYOrigin = static_cast<unsigned>(o); m_backgroundYOriginSet = true; }
111 void setAttachment(FillAttachment attachment) { m_attachment = static_cast<unsigned>(attachment); m_attachmentSet = true; }
112 void setClip(FillBox b) { m_clip = static_cast<unsigned>(b); m_clipSet = true; }
113 void setOrigin(FillBox b) { m_origin = static_cast<unsigned>(b); m_originSet = true; }
114 void setRepeatX(FillRepeat r) { m_repeatX = static_cast<unsigned>(r); m_repeatXSet = true; }
115 void setRepeatY(FillRepeat r) { m_repeatY = static_cast<unsigned>(r); m_repeatYSet = true; }
116 void setComposite(CompositeOperator c) { m_composite = static_cast<unsigned>(c); m_compositeSet = true; }
117 void setBlendMode(BlendMode b) { m_blendMode = static_cast<unsigned>(b); m_blendModeSet = true; }
118 void setSizeType(FillSizeType b) { m_sizeType = static_cast<unsigned>(b); }
119 void setSizeLength(LengthSize l) { m_sizeLength = l; }
120 void setSize(FillSize f) { m_sizeType = static_cast<unsigned>(f.type); m_sizeLength = f.size; }
121 void setMaskSourceType(MaskSourceType m) { m_maskSourceType = static_cast<unsigned>(m); m_maskSourceTypeSet = true; }
122
123 void clearImage() { m_image = nullptr; m_imageSet = false; }
124
125 void clearXPosition() { m_xPosSet = false; m_backgroundXOriginSet = false; }
126 void clearYPosition() { m_yPosSet = false; m_backgroundYOriginSet = false; }
127
128 void clearAttachment() { m_attachmentSet = false; }
129 void clearClip() { m_clipSet = false; }
130 void clearOrigin() { m_originSet = false; }
131 void clearRepeatX() { m_repeatXSet = false; }
132 void clearRepeatY() { m_repeatYSet = false; }
133 void clearComposite() { m_compositeSet = false; }
134 void clearBlendMode() { m_blendModeSet = false; }
135 void clearSize() { m_sizeType = static_cast<unsigned>(FillSizeType::None); }
136 void clearMaskSourceType() { m_maskSourceTypeSet = false; }
137
138 void setNext(std::unique_ptr<FillLayer> next) { m_next = WTFMove(next); }
139
140 FillLayer& operator=(const FillLayer&);
141 FillLayer(const FillLayer&);
142
143 bool operator==(const FillLayer&) const;
144 bool operator!=(const FillLayer& other) const { return !(*this == other); }
145
146 bool containsImage(StyleImage&) const;
147 bool imagesAreLoaded() const;
148 bool hasImage() const;
149 bool hasFixedImage() const;
150 bool hasOpaqueImage(const RenderElement&) const;
151 bool hasRepeatXY() const;
152 bool clipOccludesNextLayers(bool firstLayer) const;
153
154 FillLayerType type() const { return static_cast<FillLayerType>(m_type); }
155
156 void fillUnsetProperties();
157 void cullEmptyLayers();
158
159 static bool imagesIdentical(const FillLayer*, const FillLayer*);
160
161 static FillAttachment initialFillAttachment(FillLayerType) { return FillAttachment::ScrollBackground; }
162 static FillBox initialFillClip(FillLayerType) { return FillBox::Border; }
163 static FillBox initialFillOrigin(FillLayerType type) { return type == FillLayerType::Background ? FillBox::Padding : FillBox::Border; }
164 static FillRepeat initialFillRepeatX(FillLayerType) { return FillRepeat::Repeat; }
165 static FillRepeat initialFillRepeatY(FillLayerType) { return FillRepeat::Repeat; }
166 static CompositeOperator initialFillComposite(FillLayerType) { return CompositeSourceOver; }
167 static BlendMode initialFillBlendMode(FillLayerType) { return BlendMode::Normal; }
168 static FillSize initialFillSize(FillLayerType) { return { }; }
169 static Length initialFillXPosition(FillLayerType) { return Length(0.0f, Percent); }
170 static Length initialFillYPosition(FillLayerType) { return Length(0.0f, Percent); }
171 static StyleImage* initialFillImage(FillLayerType) { return nullptr; }
172 static MaskSourceType initialFillMaskSourceType(FillLayerType) { return MaskSourceType::Alpha; }
173
174private:
175 friend class RenderStyle;
176
177 void computeClipMax() const;
178
179 std::unique_ptr<FillLayer> m_next;
180
181 RefPtr<StyleImage> m_image;
182
183 Length m_xPosition;
184 Length m_yPosition;
185
186 LengthSize m_sizeLength;
187
188 unsigned m_attachment : 2; // FillAttachment
189 unsigned m_clip : 2; // FillBox
190 unsigned m_origin : 2; // FillBox
191 unsigned m_repeatX : 3; // FillRepeat
192 unsigned m_repeatY : 3; // FillRepeat
193 unsigned m_composite : 4; // CompositeOperator
194 unsigned m_sizeType : 2; // FillSizeType
195 unsigned m_blendMode : 5; // BlendMode
196 unsigned m_maskSourceType : 1; // MaskSourceType
197
198 unsigned m_imageSet : 1;
199 unsigned m_attachmentSet : 1;
200 unsigned m_clipSet : 1;
201 unsigned m_originSet : 1;
202 unsigned m_repeatXSet : 1;
203 unsigned m_repeatYSet : 1;
204 unsigned m_xPosSet : 1;
205 unsigned m_yPosSet : 1;
206 unsigned m_backgroundXOriginSet : 1;
207 unsigned m_backgroundYOriginSet : 1;
208 unsigned m_backgroundXOrigin : 2; // Edge
209 unsigned m_backgroundYOrigin : 2; // Edge
210 unsigned m_compositeSet : 1;
211 unsigned m_blendModeSet : 1;
212 unsigned m_maskSourceTypeSet : 1;
213
214 unsigned m_type : 1; // FillLayerType
215
216 mutable unsigned m_clipMax : 2; // FillBox, maximum m_clip value from this to bottom layer
217};
218
219WTF::TextStream& operator<<(WTF::TextStream&, FillSize);
220WTF::TextStream& operator<<(WTF::TextStream&, const FillLayer&);
221
222} // namespace WebCore
223