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