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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
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
#include "LayoutContainerBox.h"
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/IsoMalloc.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
namespace Layout {
class BlockFormattingState;
class FlexFormattingState;
class FormattingContext;
class FormattingState;
class BoxGeometry;
class InlineFormattingState;
class TableFormattingState;
class LayoutState : public CanMakeWeakPtr<LayoutState> {
WTF_MAKE_NONCOPYABLE(LayoutState);
WTF_MAKE_ISO_ALLOCATED(LayoutState);
public:
enum class FormattingContextIntegrationType {
Inline,
Flex
};
LayoutState(const Document&, const ContainerBox& rootContainer, std::optional<FormattingContextIntegrationType> = std::nullopt);
~LayoutState();
InlineFormattingState& ensureInlineFormattingState(const ContainerBox& formattingContextRoot);
BlockFormattingState& ensureBlockFormattingState(const ContainerBox& formattingContextRoot);
TableFormattingState& ensureTableFormattingState(const ContainerBox& formattingContextRoot);
FlexFormattingState& ensureFlexFormattingState(const ContainerBox& formattingContextRoot);
InlineFormattingState& formattingStateForInlineFormattingContext(const ContainerBox& inlineFormattingContextRoot) const;
BlockFormattingState& formattingStateForBlockFormattingContext(const ContainerBox& blockFormattingContextRoot) const;
TableFormattingState& formattingStateForTableFormattingContext(const ContainerBox& tableFormattingContextRoot) const;
FlexFormattingState& formattingStateForFlexFormattingContext(const ContainerBox& flexFormattingContextRoot) const;
FormattingState& formattingStateForFormattingContext(const ContainerBox& formattingRoot) const;
FormattingState& formattingStateForBox(const Box&) const;
bool hasFormattingState(const ContainerBox& formattingRoot) const;
bool hasInlineFormattingState(const ContainerBox& formattingRoot) const { return m_inlineFormattingStates.contains(&formattingRoot); }
#ifndef NDEBUG
void registerFormattingContext(const FormattingContext&);
void deregisterFormattingContext(const FormattingContext& formattingContext) { m_formattingContextList.remove(&formattingContext); }
#endif
BoxGeometry& geometryForRootBox();
BoxGeometry& ensureGeometryForBox(const Box&);
const BoxGeometry& geometryForBox(const Box&) const;
bool hasBoxGeometry(const Box&) const;
enum class QuirksMode { No, Limited, Yes };
bool inQuirksMode() const { return m_quirksMode == QuirksMode::Yes; }
bool inLimitedQuirksMode() const { return m_quirksMode == QuirksMode::Limited; }
bool inStandardsMode() const { return m_quirksMode == QuirksMode::No; }
const ContainerBox& root() const { return m_rootContainer; }
// LFC integration only. Full LFC has proper ICB access.
bool isInlineFormattingContextIntegration() const { return m_formattingContextIntegrationType && *m_formattingContextIntegrationType == FormattingContextIntegrationType::Inline; }
bool isFlexFormattingContextIntegration() const { return m_formattingContextIntegrationType && *m_formattingContextIntegrationType == FormattingContextIntegrationType::Flex; }
void setViewportSize(const LayoutSize&);
LayoutSize viewportSize() const;
enum IsIntegratedRootBoxFirstChild { Yes, No, NotApplicable };
IsIntegratedRootBoxFirstChild isIntegratedRootBoxFirstChild() const { return m_isIntegratedRootBoxFirstChild; }
void setIsIntegratedRootBoxFirstChild(bool);
bool shouldIgnoreTrailingLetterSpacing() const;
bool shouldNotSynthesizeInlineBlockBaseline() const;
private:
void setQuirksMode(QuirksMode quirksMode) { m_quirksMode = quirksMode; }
BoxGeometry& ensureGeometryForBoxSlow(const Box&);
HashMap<const ContainerBox*, std::unique_ptr<InlineFormattingState>> m_inlineFormattingStates;
HashMap<const ContainerBox*, std::unique_ptr<BlockFormattingState>> m_blockFormattingStates;
HashMap<const ContainerBox*, std::unique_ptr<TableFormattingState>> m_tableFormattingStates;
HashMap<const ContainerBox*, std::unique_ptr<FlexFormattingState>> m_flexFormattingStates;
std::unique_ptr<InlineFormattingState> m_rootInlineFormattingStateForIntegration;
std::unique_ptr<FlexFormattingState> m_rootFlexFormattingStateForIntegration;
#ifndef NDEBUG
HashSet<const FormattingContext*> m_formattingContextList;
#endif
HashMap<const Box*, std::unique_ptr<BoxGeometry>> m_layoutBoxToBoxGeometry;
QuirksMode m_quirksMode { QuirksMode::No };
CheckedRef<const ContainerBox> m_rootContainer;
// LFC integration only.
std::optional<FormattingContextIntegrationType> m_formattingContextIntegrationType;
LayoutSize m_viewportSize;
IsIntegratedRootBoxFirstChild m_isIntegratedRootBoxFirstChild { IsIntegratedRootBoxFirstChild::NotApplicable };
};
inline bool LayoutState::hasBoxGeometry(const Box& layoutBox) const
{
if (layoutBox.cachedGeometryForLayoutState(*this))
return true;
return m_layoutBoxToBoxGeometry.contains(&layoutBox);
}
inline BoxGeometry& LayoutState::ensureGeometryForBox(const Box& layoutBox)
{
if (auto* boxGeometry = layoutBox.cachedGeometryForLayoutState(*this))
return *boxGeometry;
return ensureGeometryForBoxSlow(layoutBox);
}
inline const BoxGeometry& LayoutState::geometryForBox(const Box& layoutBox) const
{
if (auto* boxGeometry = layoutBox.cachedGeometryForLayoutState(*this))
return *boxGeometry;
ASSERT(m_layoutBoxToBoxGeometry.contains(&layoutBox));
return *m_layoutBoxToBoxGeometry.get(&layoutBox);
}
#ifndef NDEBUG
inline void LayoutState::registerFormattingContext(const FormattingContext& formattingContext)
{
// Multiple formatting contexts of the same root within a layout frame indicates defective layout logic.
ASSERT(!m_formattingContextList.contains(&formattingContext));
m_formattingContextList.add(&formattingContext);
}
#endif
// These Layout::Box function are here to allow inlining.
inline bool Box::canCacheForLayoutState(const LayoutState& layoutState) const
{
return !m_cachedLayoutState || m_cachedLayoutState.get() == &layoutState;
}
inline BoxGeometry* Box::cachedGeometryForLayoutState(const LayoutState& layoutState) const
{
if (m_cachedLayoutState.get() != &layoutState)
return nullptr;
return m_cachedGeometryForLayoutState.get();
}
}
}
#endif
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