1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171
|
/*
* 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 <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class Document;
namespace Layout {
class BlockFormattingState;
class BoxGeometry;
class FlexFormattingState;
class FormattingContext;
class FormattingState;
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 ElementBox& rootContainer, std::optional<FormattingContextIntegrationType> = std::nullopt);
~LayoutState();
void updateQuirksMode(const Document&);
InlineFormattingState& ensureInlineFormattingState(const ElementBox& formattingContextRoot);
BlockFormattingState& ensureBlockFormattingState(const ElementBox& formattingContextRoot);
TableFormattingState& ensureTableFormattingState(const ElementBox& formattingContextRoot);
FlexFormattingState& ensureFlexFormattingState(const ElementBox& formattingContextRoot);
InlineFormattingState& formattingStateForInlineFormattingContext(const ElementBox& inlineFormattingContextRoot) const;
BlockFormattingState& formattingStateForBlockFormattingContext(const ElementBox& blockFormattingContextRoot) const;
TableFormattingState& formattingStateForTableFormattingContext(const ElementBox& tableFormattingContextRoot) const;
FlexFormattingState& formattingStateForFlexFormattingContext(const ElementBox& flexFormattingContextRoot) const;
FormattingState& formattingStateForFormattingContext(const ElementBox& formattingRoot) const;
void destroyBlockFormattingState(const ElementBox& formattingContextRoot);
void destroyInlineFormattingState(const ElementBox& formattingContextRoot);
bool hasFormattingState(const ElementBox& formattingRoot) const;
bool hasInlineFormattingState(const ElementBox& 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 ElementBox& 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; }
bool shouldNotSynthesizeInlineBlockBaseline() const;
private:
void setQuirksMode(QuirksMode quirksMode) { m_quirksMode = quirksMode; }
BoxGeometry& ensureGeometryForBoxSlow(const Box&);
HashMap<const ElementBox*, std::unique_ptr<InlineFormattingState>> m_inlineFormattingStates;
HashMap<const ElementBox*, std::unique_ptr<BlockFormattingState>> m_blockFormattingStates;
HashMap<const ElementBox*, std::unique_ptr<TableFormattingState>> m_tableFormattingStates;
HashMap<const ElementBox*, 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 ElementBox> m_rootContainer;
// LFC integration only.
std::optional<FormattingContextIntegrationType> m_formattingContextIntegrationType;
};
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();
}
}
}
|