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| 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 rightMarginBoxD
elta, 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_lineHeig
ht == lineHeight; | |
| 67 } | |
| 68 | |
| 69 bool isValid() { return m_isValid; } | |
| 70 LayoutUnit leftMarginBoxDelta() { ASSERT(m_isValid); return m_leftMarginBoxD
elta; } | |
| 71 LayoutUnit rightMarginBoxDelta() { ASSERT(m_isValid); return m_rightMarginBo
xDelta; } | |
| 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().shapeMarginLogic
alBoundingBox().y() + logicalTopOffset(); } | |
| 89 LayoutUnit shapeLogicalBottom() const { return computedShape().shapeMarginLo
gicalBoundingBox().maxY() + logicalTopOffset(); } | |
| 90 LayoutUnit shapeLogicalLeft() const { return computedShape().shapeMarginLogi
calBoundingBox().x() + logicalLeftOffset(); } | |
| 91 LayoutUnit shapeLogicalRight() const { return computedShape().shapeMarginLog
icalBoundingBox().maxX() + logicalLeftOffset(); } | |
| 92 LayoutUnit shapeLogicalWidth() const { return computedShape().shapeMarginLog
icalBoundingBox().width(); } | |
| 93 LayoutUnit shapeLogicalHeight() const { return computedShape().shapeMarginLo
gicalBoundingBox().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::createIn
fo(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 | |
| 115 LayoutRect computedShapePhysicalBoundingBox() const; | |
| 116 FloatPoint shapeToRendererPoint(FloatPoint) const; | |
| 117 FloatSize shapeToRendererSize(FloatSize) const; | |
| 118 const Shape& computedShape() const; | |
| 119 | |
| 120 protected: | |
| 121 ShapeOutsideInfo(const RenderBox& renderer) | |
| 122 : m_renderer(renderer) | |
| 123 { } | |
| 124 | |
| 125 private: | |
| 126 PassOwnPtr<Shape> createShapeForImage(StyleImage*, float shapeImageThreshold
, float margin) const; | |
| 127 | |
| 128 LayoutUnit logicalTopOffset() const; | |
| 129 LayoutUnit logicalLeftOffset() const; | |
| 130 | |
| 131 typedef HashMap<const RenderBox*, OwnPtr<ShapeOutsideInfo> > InfoMap; | |
| 132 static InfoMap& infoMap() | |
| 133 { | |
| 134 DEFINE_STATIC_LOCAL(InfoMap, staticInfoMap, ()); | |
| 135 return staticInfoMap; | |
| 136 } | |
| 137 | |
| 138 const RenderBox& m_renderer; | |
| 139 mutable OwnPtr<Shape> m_shape; | |
| 140 LayoutSize m_referenceBoxLogicalSize; | |
| 141 ShapeOutsideDeltas m_shapeOutsideDeltas; | |
| 142 }; | |
| 143 | |
| 144 } | |
| 145 #endif | |
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