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/*
* Copyright (C) 2018 Apple Inc. 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 APPLE INC. AND ITS CONTRIBUTORS ``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 APPLE INC. OR ITS CONTRIBUTORS
* 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 "LayoutBoxGeometry.h"
#include "LayoutElementBox.h"
#include "Shape.h"
#include <wtf/IsoMalloc.h>
#include <wtf/OptionSet.h>
namespace WebCore {
namespace Layout {
class Box;
class BoxGeometry;
class Rect;
// FloatingState holds the floating boxes for BFC using the BFC's inline direction.
// FloatingState may be inherited by nested IFCs with mismataching inline direction. In such cases floating boxes
// are added to the FloatingState as if they had matching inline direction.
class FloatingState {
WTF_MAKE_ISO_ALLOCATED(FloatingState);
public:
FloatingState(const ElementBox& blockFormattingContextRoot);
const ElementBox& root() const { return m_blockFormattingContextRoot; }
class FloatItem {
public:
// FIXME: This c'tor is only used by the render tree integation codepath.
enum class Position { Left, Right };
FloatItem(Position, const BoxGeometry& absoluteBoxGeometry, LayoutPoint localTopLeft, const Shape*);
FloatItem(const Box&, Position, const BoxGeometry& absoluteBoxGeometry, LayoutPoint localTopLeft);
~FloatItem();
bool isLeftPositioned() const { return m_position == Position::Left; }
bool isRightPositioned() const { return m_position == Position::Right; }
bool isInFormattingContextOf(const ElementBox& formattingContextRoot) const;
BoxGeometry boxGeometry() const;
Rect absoluteRectWithMargin() const { return BoxGeometry::marginBoxRect(m_absoluteBoxGeometry); }
Rect absoluteBorderBoxRect() const { return BoxGeometry::borderBoxRect(m_absoluteBoxGeometry); }
BoxGeometry::HorizontalMargin horizontalMargin() const { return m_absoluteBoxGeometry.horizontalMargin(); }
PositionInContextRoot absoluteBottom() const { return { absoluteRectWithMargin().bottom() }; }
const Shape* shape() const { return m_shape.get(); }
const Box* layoutBox() const { return m_layoutBox.get(); }
private:
CheckedPtr<const Box> m_layoutBox;
Position m_position;
BoxGeometry m_absoluteBoxGeometry;
LayoutPoint m_localTopLeft;
RefPtr<const Shape> m_shape;
};
using FloatList = Vector<FloatItem>;
const FloatList& floats() const { return m_floats; }
const FloatItem* last() const { return floats().isEmpty() ? nullptr : &m_floats.last(); }
void append(FloatItem);
void clear();
bool isEmpty() const { return floats().isEmpty(); }
bool hasLeftPositioned() const;
bool hasRightPositioned() const;
bool isLeftToRightDirection() const { return m_isLeftToRightDirection; }
// FIXME: This should always be floatingState's root().style().isLeftToRightDirection() if we used the actual containing block of the intrusive
// floats to initiate the floating state in the integration codepath (i.e. when the float comes from the parent BFC).
void setIsLeftToRightDirection(bool isLeftToRightDirection) { m_isLeftToRightDirection = isLeftToRightDirection; }
void shrinkToFit();
private:
CheckedRef<const ElementBox> m_blockFormattingContextRoot;
FloatList m_floats;
enum class PositionType {
Left = 1 << 0,
Right = 1 << 1
};
OptionSet<PositionType> m_positionTypes;
bool m_isLeftToRightDirection { true };
};
inline bool FloatingState::hasLeftPositioned() const
{
return m_positionTypes.contains(PositionType::Left);
}
inline bool FloatingState::hasRightPositioned() const
{
return m_positionTypes.contains(PositionType::Right);
}
}
}
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