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 #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     LayoutUnit logicalTopOffset() const;
 105     LayoutUnit logicalLeftOffset() const;
 106
 107     typedef HashMap<const RenderBox*, OwnPtr<ShapeOutsideInfo> > InfoMap;
 108     static InfoMap& infoMap()
 109     {
 110         DEFINE_STATIC_LOCAL(InfoMap, staticInfoMap, ());
 111         return staticInfoMap;
 112     }
 113
 114     LayoutUnit m_referenceBoxLineTop;
 115     LayoutUnit m_lineHeight;
 116
 117     const RenderBox& m_renderer;
 118     mutable OwnPtr<Shape> m_shape;
 119     LayoutSize m_referenceBoxLogicalSize;
 120     LayoutUnit m_leftMarginBoxDelta;
 121     LayoutUnit m_rightMarginBoxDelta;
 122     LayoutUnit m_borderBoxLineTop;
 123     bool m_lineOverlapsShape;
 124 };
 125
 126 }
 127 #endif