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/*
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef WrapShapeInfo_h
#define WrapShapeInfo_h
#if ENABLE(CSS_EXCLUSIONS)
#include "ExclusionShape.h"
#include "FloatRect.h"
#include "LayoutTypesInlineMethods.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class RenderBlock;
class WrapShapeInfo;
struct LineSegment {
LayoutUnit logicalLeft;
LayoutUnit logicalRight;
};
typedef Vector<LineSegment> SegmentList;
class WrapShapeInfo {
WTF_MAKE_FAST_ALLOCATED;
public:
enum LineState {
LINE_BEFORE_SHAPE,
LINE_INSIDE_SHAPE,
LINE_AFTER_SHAPE
};
~WrapShapeInfo();
static PassOwnPtr<WrapShapeInfo> create(RenderBlock* block) { return adoptPtr(new WrapShapeInfo(block)); }
static WrapShapeInfo* wrapShapeInfoForRenderBlock(const RenderBlock*);
static WrapShapeInfo* ensureWrapShapeInfoForRenderBlock(RenderBlock*);
static void removeWrapShapeInfoForRenderBlock(const RenderBlock*);
static bool isWrapShapeInfoEnabledForRenderBlock(const RenderBlock*);
LayoutUnit shapeLogicalTop() const
{
ASSERT(m_shape);
return m_shape->shapeLogicalBoundingBox().y();
}
bool hasSegments() const;
const SegmentList& segments() const
{
ASSERT(hasSegments());
return m_segments;
}
bool computeSegmentsForLine(LayoutUnit lineTop);
LineState lineState() const;
void computeShapeSize(LayoutUnit logicalWidth, LayoutUnit logicalHeight);
void dirtyWrapShapeSize() { m_wrapShapeSizeDirty = true; }
private:
WrapShapeInfo(RenderBlock*);
RenderBlock* m_block;
OwnPtr<ExclusionShape> m_shape;
LayoutUnit m_lineTop;
LayoutUnit m_logicalWidth;
LayoutUnit m_logicalHeight;
SegmentList m_segments;
bool m_wrapShapeSizeDirty;
};
inline WrapShapeInfo::LineState WrapShapeInfo::lineState() const
{
ASSERT(m_shape);
FloatRect shapeBounds = m_shape->shapeLogicalBoundingBox();
if (m_lineTop < shapeBounds.y())
return LINE_BEFORE_SHAPE;
if (m_lineTop < shapeBounds.maxY())
return LINE_INSIDE_SHAPE;
return LINE_AFTER_SHAPE;
}
}
#endif
#endif
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