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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 "LayoutElementBox.h"
#include "SecurityOrigin.h"
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
namespace Layout {
class LayoutState;
}
}
namespace WTF {
template<typename T> struct IsDeprecatedWeakRefSmartPointerException;
template<> struct IsDeprecatedWeakRefSmartPointerException<WebCore::Layout::LayoutState> : std::true_type { };
}
namespace WebCore {
class Document;
namespace LayoutIntegration {
enum class LogicalWidthType : uint8_t;
enum class LogicalHeightType : uint8_t;
}
namespace Layout {
class BlockFormattingState;
class BoxGeometry;
class FormattingContext;
class FormattingState;
class InlineContentCache;
class TableFormattingState;
class LayoutState : public CanMakeWeakPtr<LayoutState> {
WTF_MAKE_NONCOPYABLE(LayoutState);
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(LayoutState);
public:
// Primary layout state has a direct geometry cache in layout boxes.
enum class Type { Primary, Secondary };
using FormattingContextLayoutFunction = Function<void(const ElementBox&, std::optional<LayoutUnit>, LayoutState&)>;
using FormattingContextLogicalWidthFunction = Function<LayoutUnit(const ElementBox&, LayoutIntegration::LogicalWidthType)>;
using FormattingContextLogicalHeightFunction = Function<LayoutUnit(const ElementBox&, LayoutIntegration::LogicalHeightType)>;
LayoutState(const Document&, const ElementBox& rootContainer, Type, FormattingContextLayoutFunction&&, FormattingContextLogicalWidthFunction&&, FormattingContextLogicalHeightFunction&&);
~LayoutState();
Type type() const { return m_type; }
void updateQuirksMode(const Document&);
InlineContentCache& inlineContentCache(const ElementBox& formattingContextRoot);
BlockFormattingState& ensureBlockFormattingState(const ElementBox& formattingContextRoot);
TableFormattingState& ensureTableFormattingState(const ElementBox& formattingContextRoot);
BlockFormattingState& formattingStateForBlockFormattingContext(const ElementBox& blockFormattingContextRoot) const;
TableFormattingState& formattingStateForTableFormattingContext(const ElementBox& tableFormattingContextRoot) const;
FormattingState& formattingStateForFormattingContext(const ElementBox& formattingRoot) const;
void destroyBlockFormattingState(const ElementBox& formattingContextRoot);
void destroyInlineContentCache(const ElementBox& formattingContextRoot);
bool hasFormattingState(const ElementBox& formattingRoot) const;
#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 SecurityOrigin& securityOrigin() const { return m_securityOrigin.get(); }
const ElementBox& root() const { return m_rootContainer; }
void layoutWithFormattingContextForBox(const ElementBox&, std::optional<LayoutUnit> widthConstraint) const;
LayoutUnit logicalWidthWithFormattingContextForBox(const ElementBox&, LayoutIntegration::LogicalWidthType) const;
LayoutUnit logicalHeightWithFormattingContextForBox(const ElementBox&, LayoutIntegration::LogicalHeightType) const;
private:
void setQuirksMode(QuirksMode quirksMode) { m_quirksMode = quirksMode; }
BoxGeometry& ensureGeometryForBoxSlow(const Box&);
const Type m_type;
UncheckedKeyHashMap<const ElementBox*, std::unique_ptr<InlineContentCache>> m_inlineContentCaches;
UncheckedKeyHashMap<const ElementBox*, std::unique_ptr<BlockFormattingState>> m_blockFormattingStates;
UncheckedKeyHashMap<const ElementBox*, std::unique_ptr<TableFormattingState>> m_tableFormattingStates;
#ifndef NDEBUG
UncheckedKeyHashSet<const FormattingContext*> m_formattingContextList;
#endif
UncheckedKeyHashMap<const Box*, std::unique_ptr<BoxGeometry>> m_layoutBoxToBoxGeometry;
QuirksMode m_quirksMode { QuirksMode::No };
CheckedRef<const ElementBox> m_rootContainer;
Ref<SecurityOrigin> m_securityOrigin;
FormattingContextLayoutFunction m_formattingContextLayoutFunction;
FormattingContextLogicalWidthFunction m_formattingContextLogicalWidthFunction;
FormattingContextLogicalHeightFunction m_formattingContextLogicalHeightFunction;
};
inline bool LayoutState::hasBoxGeometry(const Box& layoutBox) const
{
if (LIKELY(m_type == Type::Primary))
return !!layoutBox.m_cachedGeometryForPrimaryLayoutState;
return m_layoutBoxToBoxGeometry.contains(&layoutBox);
}
inline BoxGeometry& LayoutState::ensureGeometryForBox(const Box& layoutBox)
{
if (LIKELY(m_type == Type::Primary)) {
if (auto* boxGeometry = layoutBox.m_cachedGeometryForPrimaryLayoutState.get()) {
ASSERT(layoutBox.m_primaryLayoutState == this);
return *boxGeometry;
}
}
return ensureGeometryForBoxSlow(layoutBox);
}
inline const BoxGeometry& LayoutState::geometryForBox(const Box& layoutBox) const
{
if (LIKELY(m_type == Type::Primary)) {
ASSERT(layoutBox.m_primaryLayoutState == this);
return *layoutBox.m_cachedGeometryForPrimaryLayoutState;
}
ASSERT(layoutBox.m_primaryLayoutState != this);
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
}
}
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