118 lines
4.6 KiB
C++
118 lines
4.6 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 "FormattingConstraints.h"
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#include "LayoutContainerBox.h"
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#include "LayoutUnit.h"
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#include "LayoutUnits.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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class LayoutSize;
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struct Length;
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namespace Layout {
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class BoxGeometry;
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class ContainerBox;
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struct ConstraintsForInFlowContent;
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struct ConstraintsForOutOfFlowContent;
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struct HorizontalConstraints;
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class FormattingGeometry;
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class FormattingState;
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class FormattingQuirks;
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struct IntrinsicWidthConstraints;
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class InvalidationState;
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class LayoutState;
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class FormattingContext {
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WTF_MAKE_ISO_ALLOCATED(FormattingContext);
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public:
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virtual ~FormattingContext();
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virtual void layoutInFlowContent(InvalidationState&, const ConstraintsForInFlowContent&) = 0;
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void layoutOutOfFlowContent(InvalidationState&, const ConstraintsForOutOfFlowContent&);
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virtual IntrinsicWidthConstraints computedIntrinsicWidthConstraints() = 0;
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virtual LayoutUnit usedContentHeight() const = 0;
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const ContainerBox& root() const { return *m_root; }
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LayoutState& layoutState() const;
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const FormattingState& formattingState() const { return m_formattingState; }
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virtual const FormattingGeometry& formattingGeometry() const = 0;
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virtual const FormattingQuirks& formattingQuirks() const = 0;
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enum class EscapeReason {
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TableQuirkNeedsGeometryFromEstablishedFormattingContext,
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OutOfFlowBoxNeedsInFlowGeometry,
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FloatBoxIsAlwaysRelativeToFloatStateRoot,
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FindFixedHeightAncestorQuirk,
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DocumentBoxStretchesToViewportQuirk,
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BodyStretchesToViewportQuirk,
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TableNeedsAccessToTableWrapper
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};
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const BoxGeometry& geometryForBox(const Box&, std::optional<EscapeReason> = std::nullopt) const;
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bool isBlockFormattingContext() const { return root().establishesBlockFormattingContext(); }
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bool isInlineFormattingContext() const { return root().establishesInlineFormattingContext(); }
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bool isTableFormattingContext() const { return root().establishesTableFormattingContext(); }
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bool isTableWrapperBlockFormattingContext() const { return isBlockFormattingContext() && root().isTableWrapperBox(); }
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bool isFlexFormattingContext() const { return root().establishesFlexFormattingContext(); }
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protected:
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FormattingContext(const ContainerBox& formattingContextRoot, FormattingState&);
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FormattingState& formattingState() { return m_formattingState; }
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void computeBorderAndPadding(const Box&, const HorizontalConstraints&);
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#ifndef NDEBUG
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virtual void validateGeometryConstraintsAfterLayout() const;
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#endif
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using LayoutQueue = Vector<const Box*>;
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private:
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void collectOutOfFlowDescendantsIfNeeded();
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void computeOutOfFlowVerticalGeometry(const Box&, const ConstraintsForOutOfFlowContent&);
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void computeOutOfFlowHorizontalGeometry(const Box&, const ConstraintsForOutOfFlowContent&);
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WeakPtr<const ContainerBox> m_root;
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FormattingState& m_formattingState;
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};
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}
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}
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#define SPECIALIZE_TYPE_TRAITS_LAYOUT_FORMATTING_CONTEXT(ToValueTypeName, predicate) \
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SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::Layout::ToValueTypeName) \
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static bool isType(const WebCore::Layout::FormattingContext& formattingContext) { return formattingContext.predicate; } \
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SPECIALIZE_TYPE_TRAITS_END()
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#endif
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