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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 "FormattingContext.h"
#include "LayoutState.h"
#include <wtf/IsoMalloc.h>
namespace WebCore {
namespace Layout {
class Box;
enum class StyleDiff;
class FormattingState {
WTF_MAKE_NONCOPYABLE(FormattingState);
WTF_MAKE_ISO_ALLOCATED(FormattingState);
public:
void markNeedsLayout(const Box&, StyleDiff);
bool needsLayout(const Box&);
void setIntrinsicWidthConstraintsForBox(const Box&, IntrinsicWidthConstraints);
std::optional<IntrinsicWidthConstraints> intrinsicWidthConstraintsForBox(const Box&) const;
void clearIntrinsicWidthConstraints(const Box&);
void setIntrinsicWidthConstraints(IntrinsicWidthConstraints intrinsicWidthConstraints) { m_intrinsicWidthConstraints = intrinsicWidthConstraints; }
void resetIntrinsicWidthConstraints() { m_intrinsicWidthConstraints = { }; }
std::optional<IntrinsicWidthConstraints> intrinsicWidthConstraints() const { return m_intrinsicWidthConstraints; }
bool isBlockFormattingState() const { return m_type == Type::Block; }
bool isInlineFormattingState() const { return m_type == Type::Inline; }
bool isTableFormattingState() const { return m_type == Type::Table; }
bool isFlexFormattingState() const { return m_type == Type::Flex; }
LayoutState& layoutState() const { return m_layoutState; }
// FIXME: We need to find a way to limit access to mutable geometry.
BoxGeometry& boxGeometry(const Box& layoutBox);
// Since we layout the out-of-flow boxes at the end of the formatting context layout, it's okay to store them in the formatting state -as opposed to the containing block level.
using OutOfFlowBoxList = Vector<CheckedRef<const Box>>;
void addOutOfFlowBox(const Box& outOfFlowBox) { m_outOfFlowBoxes.append(outOfFlowBox); }
void setOutOfFlowBoxes(OutOfFlowBoxList&& outOfFlowBoxes) { m_outOfFlowBoxes = WTFMove(outOfFlowBoxes); }
const OutOfFlowBoxList& outOfFlowBoxes() const { return m_outOfFlowBoxes; }
protected:
enum class Type { Block, Inline, Table, Flex };
FormattingState(Type, LayoutState&);
~FormattingState();
private:
LayoutState& m_layoutState;
HashMap<const Box*, IntrinsicWidthConstraints> m_intrinsicWidthConstraintsForBoxes;
std::optional<IntrinsicWidthConstraints> m_intrinsicWidthConstraints;
// FIXME: This needs WeakListHashSet
OutOfFlowBoxList m_outOfFlowBoxes;
Type m_type;
};
inline void FormattingState::setIntrinsicWidthConstraintsForBox(const Box& layoutBox, IntrinsicWidthConstraints intrinsicWidthConstraints)
{
ASSERT(!m_intrinsicWidthConstraintsForBoxes.contains(&layoutBox));
ASSERT(&m_layoutState.formattingStateForFormattingContext(FormattingContext::formattingContextRoot(layoutBox)) == this);
m_intrinsicWidthConstraintsForBoxes.set(&layoutBox, intrinsicWidthConstraints);
}
inline void FormattingState::clearIntrinsicWidthConstraints(const Box& layoutBox)
{
m_intrinsicWidthConstraints = { };
m_intrinsicWidthConstraintsForBoxes.remove(&layoutBox);
}
inline std::optional<IntrinsicWidthConstraints> FormattingState::intrinsicWidthConstraintsForBox(const Box& layoutBox) const
{
ASSERT(&m_layoutState.formattingStateForFormattingContext(FormattingContext::formattingContextRoot(layoutBox)) == this);
auto iterator = m_intrinsicWidthConstraintsForBoxes.find(&layoutBox);
if (iterator == m_intrinsicWidthConstraintsForBoxes.end())
return { };
return iterator->value;
}
}
}
#define SPECIALIZE_TYPE_TRAITS_LAYOUT_FORMATTING_STATE(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::Layout::ToValueTypeName) \
static bool isType(const WebCore::Layout::FormattingState& formattingState) { return formattingState.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
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