Upstream version 11.39.250.0
[platform/framework/web/crosswalk.git] / src / third_party / WebKit / Source / core / rendering / shapes / ShapeOutsideInfo.h
1 /*
2  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * 1. Redistributions of source code must retain the above
9  *    copyright notice, this list of conditions and the following
10  *    disclaimer.
11  * 2. Redistributions in binary form must reproduce the above
12  *    copyright notice, this list of conditions and the following
13  *    disclaimer in the documentation and/or other materials
14  *    provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
21  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
25  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
26  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29
30 #ifndef ShapeOutsideInfo_h
31 #define ShapeOutsideInfo_h
32
33 #include "core/rendering/shapes/Shape.h"
34 #include "core/rendering/style/RenderStyle.h"
35 #include "core/rendering/style/ShapeValue.h"
36 #include "platform/geometry/FloatRect.h"
37 #include "platform/geometry/LayoutSize.h"
38 #include "wtf/OwnPtr.h"
39
40 namespace blink {
41
42 class RenderBlockFlow;
43 class RenderBox;
44 class FloatingObject;
45
46 class ShapeOutsideDeltas FINAL {
47 public:
48     ShapeOutsideDeltas()
49         : m_lineOverlapsShape(false)
50         , m_isValid(false)
51     {
52     }
53
54     ShapeOutsideDeltas(LayoutUnit leftMarginBoxDelta, LayoutUnit rightMarginBoxDelta, bool lineOverlapsShape, LayoutUnit borderBoxLineTop, LayoutUnit lineHeight)
55         : m_leftMarginBoxDelta(leftMarginBoxDelta)
56         , m_rightMarginBoxDelta(rightMarginBoxDelta)
57         , m_borderBoxLineTop(borderBoxLineTop)
58         , m_lineHeight(lineHeight)
59         , m_lineOverlapsShape(lineOverlapsShape)
60         , m_isValid(true)
61     {
62     }
63
64     bool isForLine(LayoutUnit borderBoxLineTop, LayoutUnit lineHeight)
65     {
66         return m_isValid && m_borderBoxLineTop == borderBoxLineTop && m_lineHeight == lineHeight;
67     }
68
69     bool isValid() { return m_isValid; }
70     LayoutUnit leftMarginBoxDelta() { ASSERT(m_isValid); return m_leftMarginBoxDelta; }
71     LayoutUnit rightMarginBoxDelta() { ASSERT(m_isValid); return m_rightMarginBoxDelta; }
72     bool lineOverlapsShape() { ASSERT(m_isValid); return m_lineOverlapsShape; }
73
74 private:
75     LayoutUnit m_leftMarginBoxDelta;
76     LayoutUnit m_rightMarginBoxDelta;
77     LayoutUnit m_borderBoxLineTop;
78     LayoutUnit m_lineHeight;
79     bool m_lineOverlapsShape : 1;
80     bool m_isValid : 1;
81 };
82
83 class ShapeOutsideInfo FINAL {
84     WTF_MAKE_FAST_ALLOCATED;
85 public:
86     void setReferenceBoxLogicalSize(LayoutSize);
87
88     LayoutUnit shapeLogicalTop() const { return computedShape().shapeMarginLogicalBoundingBox().y() + logicalTopOffset(); }
89     LayoutUnit shapeLogicalBottom() const { return computedShape().shapeMarginLogicalBoundingBox().maxY() + logicalTopOffset(); }
90     LayoutUnit shapeLogicalLeft() const { return computedShape().shapeMarginLogicalBoundingBox().x() + logicalLeftOffset(); }
91     LayoutUnit shapeLogicalRight() const { return computedShape().shapeMarginLogicalBoundingBox().maxX() + logicalLeftOffset(); }
92     LayoutUnit shapeLogicalWidth() const { return computedShape().shapeMarginLogicalBoundingBox().width(); }
93     LayoutUnit shapeLogicalHeight() const { return computedShape().shapeMarginLogicalBoundingBox().height(); }
94
95     static PassOwnPtr<ShapeOutsideInfo> createInfo(const RenderBox& renderer) { return adoptPtr(new ShapeOutsideInfo(renderer)); }
96     static bool isEnabledFor(const RenderBox&);
97
98     ShapeOutsideDeltas computeDeltasForContainingBlockLine(const RenderBlockFlow&, const FloatingObject&, LayoutUnit lineTop, LayoutUnit lineHeight);
99
100     static ShapeOutsideInfo& ensureInfo(const RenderBox& key)
101     {
102         InfoMap& infoMap = ShapeOutsideInfo::infoMap();
103         if (ShapeOutsideInfo* info = infoMap.get(&key))
104             return *info;
105         InfoMap::AddResult result = infoMap.add(&key, ShapeOutsideInfo::createInfo(key));
106         return *result.storedValue->value;
107     }
108     static void removeInfo(const RenderBox& key) { infoMap().remove(&key); }
109     static ShapeOutsideInfo* info(const RenderBox& key) { return infoMap().get(&key); }
110
111     void markShapeAsDirty() { m_shape.clear(); }
112     bool isShapeDirty() { return !m_shape.get(); }
113     LayoutSize shapeSize() const { return m_referenceBoxLogicalSize; }
114     bool isComputingShape() const { return m_isComputingShape; }
115
116     LayoutRect computedShapePhysicalBoundingBox() const;
117     FloatPoint shapeToRendererPoint(FloatPoint) const;
118     FloatSize shapeToRendererSize(FloatSize) const;
119     const Shape& computedShape() const;
120
121 protected:
122     ShapeOutsideInfo(const RenderBox& renderer)
123         : m_renderer(renderer)
124         , m_isComputingShape(false)
125     { }
126
127 private:
128     PassOwnPtr<Shape> createShapeForImage(StyleImage*, float shapeImageThreshold, WritingMode, float margin) const;
129
130     LayoutUnit logicalTopOffset() const;
131     LayoutUnit logicalLeftOffset() const;
132
133     typedef HashMap<const RenderBox*, OwnPtr<ShapeOutsideInfo> > InfoMap;
134     static InfoMap& infoMap()
135     {
136         DEFINE_STATIC_LOCAL(InfoMap, staticInfoMap, ());
137         return staticInfoMap;
138     }
139
140     const RenderBox& m_renderer;
141     mutable OwnPtr<Shape> m_shape;
142     LayoutSize m_referenceBoxLogicalSize;
143     ShapeOutsideDeltas m_shapeOutsideDeltas;
144     mutable bool m_isComputingShape;
145 };
146
147 }
148 #endif