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: ShapeOutsideDeltas()48 ShapeOutsideDeltas() 49 : m_lineOverlapsShape(false) 50 , m_isValid(false) 51 { 52 } 53 ShapeOutsideDeltas(LayoutUnit leftMarginBoxDelta,LayoutUnit rightMarginBoxDelta,bool lineOverlapsShape,LayoutUnit borderBoxLineTop,LayoutUnit lineHeight)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 isForLine(LayoutUnit borderBoxLineTop,LayoutUnit lineHeight)64 bool isForLine(LayoutUnit borderBoxLineTop, LayoutUnit lineHeight) 65 { 66 return m_isValid && m_borderBoxLineTop == borderBoxLineTop && m_lineHeight == lineHeight; 67 } 68 isValid()69 bool isValid() { return m_isValid; } leftMarginBoxDelta()70 LayoutUnit leftMarginBoxDelta() { ASSERT(m_isValid); return m_leftMarginBoxDelta; } rightMarginBoxDelta()71 LayoutUnit rightMarginBoxDelta() { ASSERT(m_isValid); return m_rightMarginBoxDelta; } lineOverlapsShape()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 shapeLogicalTop()88 LayoutUnit shapeLogicalTop() const { return computedShape().shapeMarginLogicalBoundingBox().y() + logicalTopOffset(); } shapeLogicalBottom()89 LayoutUnit shapeLogicalBottom() const { return computedShape().shapeMarginLogicalBoundingBox().maxY() + logicalTopOffset(); } shapeLogicalLeft()90 LayoutUnit shapeLogicalLeft() const { return computedShape().shapeMarginLogicalBoundingBox().x() + logicalLeftOffset(); } shapeLogicalRight()91 LayoutUnit shapeLogicalRight() const { return computedShape().shapeMarginLogicalBoundingBox().maxX() + logicalLeftOffset(); } shapeLogicalWidth()92 LayoutUnit shapeLogicalWidth() const { return computedShape().shapeMarginLogicalBoundingBox().width(); } shapeLogicalHeight()93 LayoutUnit shapeLogicalHeight() const { return computedShape().shapeMarginLogicalBoundingBox().height(); } 94 createInfo(const RenderBox & renderer)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 ensureInfo(const RenderBox & key)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 } removeInfo(const RenderBox & key)108 static void removeInfo(const RenderBox& key) { infoMap().remove(&key); } info(const RenderBox & key)109 static ShapeOutsideInfo* info(const RenderBox& key) { return infoMap().get(&key); } 110 markShapeAsDirty()111 void markShapeAsDirty() { m_shape.clear(); } isShapeDirty()112 bool isShapeDirty() { return !m_shape.get(); } shapeSize()113 LayoutSize shapeSize() const { return m_referenceBoxLogicalSize; } isComputingShape()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: ShapeOutsideInfo(const RenderBox & renderer)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; 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 149