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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.
*/
#pragma once
#include "LayoutSize.h"
#include "Shape.h"
#include <wtf/HashMap.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
class RenderBlockFlow;
class RenderBox;
class StyleImage;
class FloatingObject;
Ref<const Shape> makeShapeForShapeOutside(const RenderBox&);
class ShapeOutsideDeltas final {
public:
ShapeOutsideDeltas()
: m_lineOverlapsShape(false)
, m_isValid(false)
{
}
ShapeOutsideDeltas(LayoutUnit leftMarginBoxDelta, LayoutUnit rightMarginBoxDelta, bool lineOverlapsShape, LayoutUnit borderBoxLineTop, LayoutUnit lineHeight)
: m_leftMarginBoxDelta(leftMarginBoxDelta)
, m_rightMarginBoxDelta(rightMarginBoxDelta)
, m_borderBoxLineTop(borderBoxLineTop)
, m_lineHeight(lineHeight)
, m_lineOverlapsShape(lineOverlapsShape)
, m_isValid(true)
{
}
bool isForLine(LayoutUnit borderBoxLineTop, LayoutUnit lineHeight)
{
return m_isValid && m_borderBoxLineTop == borderBoxLineTop && m_lineHeight == lineHeight;
}
bool isValid() { return m_isValid; }
LayoutUnit leftMarginBoxDelta() { ASSERT(m_isValid); return m_leftMarginBoxDelta; }
LayoutUnit rightMarginBoxDelta() { ASSERT(m_isValid); return m_rightMarginBoxDelta; }
bool lineOverlapsShape() { ASSERT(m_isValid); return m_lineOverlapsShape; }
private:
LayoutUnit m_leftMarginBoxDelta;
LayoutUnit m_rightMarginBoxDelta;
LayoutUnit m_borderBoxLineTop;
LayoutUnit m_lineHeight;
unsigned m_lineOverlapsShape : 1;
unsigned m_isValid : 1;
};
class ShapeOutsideInfo final {
WTF_MAKE_FAST_ALLOCATED;
public:
ShapeOutsideInfo(const RenderBox& renderer)
: m_renderer(renderer)
{
}
static bool isEnabledFor(const RenderBox&);
ShapeOutsideDeltas computeDeltasForContainingBlockLine(const RenderBlockFlow&, const FloatingObject&, LayoutUnit lineTop, LayoutUnit lineHeight);
void invalidateForSizeChangeIfNeeded();
LayoutUnit shapeLogicalBottom() const { return computedShape().shapeMarginLogicalBoundingBox().maxY(); }
void markShapeAsDirty() { m_shape = nullptr; }
bool isShapeDirty() { return !m_shape; }
LayoutRect computedShapePhysicalBoundingBox() const;
FloatPoint shapeToRendererPoint(const FloatPoint&) const;
const Shape& computedShape() const;
static ShapeOutsideInfo& ensureInfo(const RenderBox& key)
{
InfoMap& infoMap = ShapeOutsideInfo::infoMap();
if (ShapeOutsideInfo* info = infoMap.get(&key))
return *info;
auto result = infoMap.add(&key, makeUnique<ShapeOutsideInfo>(key));
return *result.iterator->value;
}
static void removeInfo(const RenderBox& key) { infoMap().remove(&key); }
static ShapeOutsideInfo* info(const RenderBox& key) { return infoMap().get(&key); }
private:
LayoutUnit logicalTopOffset() const;
LayoutUnit logicalLeftOffset() const;
typedef HashMap<const RenderBox*, std::unique_ptr<ShapeOutsideInfo>> InfoMap;
static InfoMap& infoMap()
{
static NeverDestroyed<InfoMap> staticInfoMap;
return staticInfoMap;
}
const RenderBox& m_renderer;
mutable RefPtr<const Shape> m_shape;
LayoutSize m_cachedShapeLogicalSize;
ShapeOutsideDeltas m_shapeOutsideDeltas;
};
}
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