119 lines
5.0 KiB
C++
119 lines
5.0 KiB
C++
/*
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* Copyright (C) 2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
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#include "FormattingContext.h"
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#include "LayoutState.h"
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#include <wtf/IsoMalloc.h>
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#include <wtf/WeakPtr.h>
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namespace WebCore {
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namespace Layout {
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class Box;
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class FloatingState;
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enum class StyleDiff;
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class FormattingState {
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WTF_MAKE_NONCOPYABLE(FormattingState);
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WTF_MAKE_ISO_ALLOCATED(FormattingState);
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public:
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FloatingState& floatingState() const { return m_floatingState; }
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void markNeedsLayout(const Box&, StyleDiff);
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bool needsLayout(const Box&);
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void setIntrinsicWidthConstraintsForBox(const Box&, IntrinsicWidthConstraints);
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std::optional<IntrinsicWidthConstraints> intrinsicWidthConstraintsForBox(const Box&) const;
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void clearIntrinsicWidthConstraints(const Box&);
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void setIntrinsicWidthConstraints(IntrinsicWidthConstraints intrinsicWidthConstraints) { m_intrinsicWidthConstraints = intrinsicWidthConstraints; }
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std::optional<IntrinsicWidthConstraints> intrinsicWidthConstraints() const { return m_intrinsicWidthConstraints; }
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bool isBlockFormattingState() const { return m_type == Type::Block; }
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bool isInlineFormattingState() const { return m_type == Type::Inline; }
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bool isTableFormattingState() const { return m_type == Type::Table; }
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bool isFlexFormattingState() const { return m_type == Type::Flex; }
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LayoutState& layoutState() const { return m_layoutState; }
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// FIXME: We need to find a way to limit access to mutatable geometry.
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BoxGeometry& boxGeometry(const Box& layoutBox);
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// 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.
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using OutOfFlowBoxList = Vector<WeakPtr<const Box>>;
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void addOutOfFlowBox(const Box& outOfFlowBox) { m_outOfFlowBoxes.append(makeWeakPtr(outOfFlowBox)); }
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void removeOutOfFlowBox(const Box&);
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const OutOfFlowBoxList& outOfFlowBoxes() const { return m_outOfFlowBoxes; }
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protected:
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enum class Type { Block, Inline, Table, Flex };
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FormattingState(Ref<FloatingState>&&, Type, LayoutState&);
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~FormattingState();
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private:
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LayoutState& m_layoutState;
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Ref<FloatingState> m_floatingState;
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HashMap<const Box*, IntrinsicWidthConstraints> m_intrinsicWidthConstraintsForBoxes;
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std::optional<IntrinsicWidthConstraints> m_intrinsicWidthConstraints;
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// FIXME: This needs WeakListHashSet
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OutOfFlowBoxList m_outOfFlowBoxes;
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Type m_type;
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};
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inline void FormattingState::setIntrinsicWidthConstraintsForBox(const Box& layoutBox, IntrinsicWidthConstraints intrinsicWidthConstraints)
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{
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ASSERT(!m_intrinsicWidthConstraintsForBoxes.contains(&layoutBox));
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ASSERT(&m_layoutState.formattingStateForBox(layoutBox) == this);
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m_intrinsicWidthConstraintsForBoxes.set(&layoutBox, intrinsicWidthConstraints);
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}
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inline void FormattingState::clearIntrinsicWidthConstraints(const Box& layoutBox)
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{
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m_intrinsicWidthConstraints = { };
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m_intrinsicWidthConstraintsForBoxes.remove(&layoutBox);
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}
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inline std::optional<IntrinsicWidthConstraints> FormattingState::intrinsicWidthConstraintsForBox(const Box& layoutBox) const
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{
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ASSERT(&m_layoutState.formattingStateForBox(layoutBox) == this);
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auto iterator = m_intrinsicWidthConstraintsForBoxes.find(&layoutBox);
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if (iterator == m_intrinsicWidthConstraintsForBoxes.end())
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return { };
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return iterator->value;
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}
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}
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}
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#define SPECIALIZE_TYPE_TRAITS_LAYOUT_FORMATTING_STATE(ToValueTypeName, predicate) \
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SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::Layout::ToValueTypeName) \
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static bool isType(const WebCore::Layout::FormattingState& formattingState) { return formattingState.predicate; } \
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SPECIALIZE_TYPE_TRAITS_END()
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#endif
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