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 #include "wtf/Vector.h" 40 41 namespace WebCore { 42 43 class RenderBlockFlow; 44 class RenderBox; 45 class FloatingObject; 46 47 class ShapeOutsideInfo FINAL { 48 WTF_MAKE_FAST_ALLOCATED; 49 public: 50 void setReferenceBoxLogicalSize(LayoutSize); 51 52 SegmentList computeSegmentsForLine(LayoutUnit lineTop, LayoutUnit lineHeight) const; 53 54 LayoutUnit shapeLogicalTop() const { return computedShape().shapeMarginLogicalBoundingBox().y() + logicalTopOffset(); } 55 LayoutUnit shapeLogicalBottom() const { return computedShape().shapeMarginLogicalBoundingBox().maxY() + logicalTopOffset(); } 56 LayoutUnit shapeLogicalLeft() const { return computedShape().shapeMarginLogicalBoundingBox().x() + logicalLeftOffset(); } 57 LayoutUnit shapeLogicalRight() const { return computedShape().shapeMarginLogicalBoundingBox().maxX() + logicalLeftOffset(); } 58 LayoutUnit shapeLogicalWidth() const { return computedShape().shapeMarginLogicalBoundingBox().width(); } 59 LayoutUnit shapeLogicalHeight() const { return computedShape().shapeMarginLogicalBoundingBox().height(); } 60 61 LayoutUnit logicalLineTop() const { return m_referenceBoxLineTop + logicalTopOffset(); } 62 LayoutUnit logicalLineBottom() const { return m_referenceBoxLineTop + m_lineHeight + logicalTopOffset(); } 63 64 LayoutUnit leftMarginBoxDelta() const { return m_leftMarginBoxDelta; } 65 LayoutUnit rightMarginBoxDelta() const { return m_rightMarginBoxDelta; } 66 bool lineOverlapsShape() const { return m_lineOverlapsShape; } 67 68 static PassOwnPtr<ShapeOutsideInfo> createInfo(const RenderBox& renderer) { return adoptPtr(new ShapeOutsideInfo(renderer)); } 69 static bool isEnabledFor(const RenderBox&); 70 void updateDeltasForContainingBlockLine(const RenderBlockFlow&, const FloatingObject&, LayoutUnit lineTop, LayoutUnit lineHeight); 71 72 bool lineOverlapsShapeBounds() const 73 { 74 return computedShape().lineOverlapsShapeMarginBounds(m_referenceBoxLineTop, m_lineHeight); 75 } 76 77 static ShapeOutsideInfo& ensureInfo(const RenderBox& key) 78 { 79 InfoMap& infoMap = ShapeOutsideInfo::infoMap(); 80 if (ShapeOutsideInfo* info = infoMap.get(&key)) 81 return *info; 82 InfoMap::AddResult result = infoMap.add(&key, ShapeOutsideInfo::createInfo(key)); 83 return *result.storedValue->value; 84 } 85 static void removeInfo(const RenderBox& key) { infoMap().remove(&key); } 86 static ShapeOutsideInfo* info(const RenderBox& key) { return infoMap().get(&key); } 87 88 void markShapeAsDirty() { m_shape.clear(); } 89 bool isShapeDirty() { return !m_shape.get(); } 90 LayoutSize shapeSize() const { return m_referenceBoxLogicalSize; } 91 92 LayoutRect computedShapePhysicalBoundingBox() const; 93 FloatPoint shapeToRendererPoint(FloatPoint) const; 94 FloatSize shapeToRendererSize(FloatSize) const; 95 const Shape& computedShape() const; 96 97 protected: 98 ShapeOutsideInfo(const RenderBox& renderer) 99 : m_renderer(renderer) 100 , m_lineOverlapsShape(false) 101 { } 102 103 private: 104 PassOwnPtr<Shape> createShapeForImage(StyleImage*, float shapeImageThreshold, WritingMode, float margin) const; 105 106 LayoutUnit logicalTopOffset() const; 107 LayoutUnit logicalLeftOffset() const; 108 109 typedef HashMap<const RenderBox*, OwnPtr<ShapeOutsideInfo> > InfoMap; 110 static InfoMap& infoMap() 111 { 112 DEFINE_STATIC_LOCAL(InfoMap, staticInfoMap, ()); 113 return staticInfoMap; 114 } 115 116 LayoutUnit m_referenceBoxLineTop; 117 LayoutUnit m_lineHeight; 118 119 const RenderBox& m_renderer; 120 mutable OwnPtr<Shape> m_shape; 121 LayoutSize m_referenceBoxLogicalSize; 122 LayoutUnit m_leftMarginBoxDelta; 123 LayoutUnit m_rightMarginBoxDelta; 124 LayoutUnit m_borderBoxLineTop; 125 bool m_lineOverlapsShape; 126 }; 127 128 } 129 #endif 130