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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 ShapeOutsideInfo_h
#define ShapeOutsideInfo_h
#include "core/layout/shapes/Shape.h"
#include "core/style/ShapeValue.h"
#include "platform/geometry/FloatRect.h"
#include "platform/geometry/LayoutSize.h"
#include "wtf/PtrUtil.h"
#include <memory>
namespace blink {
class LayoutBox;
class LineLayoutBlockFlow;
class FloatingObject;
class ShapeOutsideDeltas final {
DISALLOW_NEW();
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;
bool m_lineOverlapsShape : 1;
bool m_isValid : 1;
};
class ShapeOutsideInfo final {
USING_FAST_MALLOC(ShapeOutsideInfo);
public:
void setReferenceBoxLogicalSize(LayoutSize);
LayoutUnit shapeLogicalTop() const {
return computedShape().shapeMarginLogicalBoundingBox().y() +
logicalTopOffset();
}
LayoutUnit shapeLogicalBottom() const {
return computedShape().shapeMarginLogicalBoundingBox().maxY() +
logicalTopOffset();
}
LayoutUnit shapeLogicalLeft() const {
return computedShape().shapeMarginLogicalBoundingBox().x() +
logicalLeftOffset();
}
LayoutUnit shapeLogicalRight() const {
return computedShape().shapeMarginLogicalBoundingBox().maxX() +
logicalLeftOffset();
}
LayoutUnit shapeLogicalWidth() const {
return computedShape().shapeMarginLogicalBoundingBox().width();
}
LayoutUnit shapeLogicalHeight() const {
return computedShape().shapeMarginLogicalBoundingBox().height();
}
static std::unique_ptr<ShapeOutsideInfo> createInfo(
const LayoutBox& layoutBox) {
return WTF::wrapUnique(new ShapeOutsideInfo(layoutBox));
}
static bool isEnabledFor(const LayoutBox&);
ShapeOutsideDeltas computeDeltasForContainingBlockLine(
const LineLayoutBlockFlow&,
const FloatingObject&,
LayoutUnit lineTop,
LayoutUnit lineHeight);
static ShapeOutsideInfo& ensureInfo(const LayoutBox& key) {
InfoMap& infoMap = ShapeOutsideInfo::infoMap();
if (ShapeOutsideInfo* info = infoMap.get(&key))
return *info;
InfoMap::AddResult result =
infoMap.add(&key, ShapeOutsideInfo::createInfo(key));
return *result.storedValue->value;
}
static void removeInfo(const LayoutBox& key) { infoMap().remove(&key); }
static ShapeOutsideInfo* info(const LayoutBox& key) {
return infoMap().get(&key);
}
void markShapeAsDirty() { m_shape.reset(); }
bool isShapeDirty() { return !m_shape.get(); }
LayoutSize shapeSize() const { return m_referenceBoxLogicalSize; }
bool isComputingShape() const { return m_isComputingShape; }
LayoutRect computedShapePhysicalBoundingBox() const;
FloatPoint shapeToLayoutObjectPoint(FloatPoint) const;
FloatSize shapeToLayoutObjectSize(FloatSize) const;
const Shape& computedShape() const;
protected:
ShapeOutsideInfo(const LayoutBox& layoutBox)
: m_layoutBox(layoutBox), m_isComputingShape(false) {}
private:
std::unique_ptr<Shape> createShapeForImage(StyleImage*,
float shapeImageThreshold,
WritingMode,
float margin) const;
LayoutUnit logicalTopOffset() const;
LayoutUnit logicalLeftOffset() const;
typedef HashMap<const LayoutBox*, std::unique_ptr<ShapeOutsideInfo>> InfoMap;
static InfoMap& infoMap() {
DEFINE_STATIC_LOCAL(InfoMap, staticInfoMap, ());
return staticInfoMap;
}
const LayoutBox& m_layoutBox;
mutable std::unique_ptr<Shape> m_shape;
LayoutSize m_referenceBoxLogicalSize;
ShapeOutsideDeltas m_shapeOutsideDeltas;
mutable bool m_isComputingShape;
};
} // namespace blink
#endif
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