| /* |
| * 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 "LayoutReplaced.h" |
| #include "RenderStyle.h" |
| #include <wtf/IsoMalloc.h> |
| #include <wtf/WeakPtr.h> |
| |
| namespace WebCore { |
| |
| namespace Layout { |
| |
| class Container; |
| class TreeBuilder; |
| |
| class Box : public CanMakeWeakPtr<Box> { |
| WTF_MAKE_ISO_ALLOCATED(Box); |
| public: |
| enum class ElementType { |
| Document, |
| Body, |
| TableCell, |
| TableColumn, |
| TableRow, |
| TableColumnGroup, |
| TableRowGroup, |
| TableHeaderGroup, |
| TableFooterGroup, |
| Image, |
| IFrame, |
| GenericElement |
| }; |
| |
| struct ElementAttributes { |
| ElementType elementType; |
| }; |
| |
| enum BaseTypeFlag { |
| BoxFlag = 1 << 0, |
| ContainerFlag = 1 << 1, |
| BlockContainerFlag = 1 << 2, |
| InlineBoxFlag = 1 << 3, |
| InlineContainerFlag = 1 << 4, |
| LineBreakBoxFlag = 1 << 5 |
| }; |
| typedef unsigned BaseTypeFlags; |
| |
| Box(Optional<ElementAttributes>, RenderStyle&&); |
| virtual ~Box(); |
| |
| bool establishesFormattingContext() const; |
| bool establishesBlockFormattingContext() const; |
| bool establishesBlockFormattingContextOnly() const; |
| virtual bool establishesInlineFormattingContext() const { return false; } |
| virtual bool establishesInlineFormattingContextOnly() const { return false; } |
| |
| bool isInFlow() const { return !isFloatingOrOutOfFlowPositioned(); } |
| bool isPositioned() const { return isInFlowPositioned() || isOutOfFlowPositioned(); } |
| bool isInFlowPositioned() const { return isRelativelyPositioned() || isStickyPositioned(); } |
| bool isOutOfFlowPositioned() const { return isAbsolutelyPositioned(); } |
| bool isRelativelyPositioned() const; |
| bool isStickyPositioned() const; |
| bool isAbsolutelyPositioned() const; |
| bool isFixedPositioned() const; |
| bool isFloatingPositioned() const; |
| bool isLeftFloatingPositioned() const; |
| bool isRightFloatingPositioned() const; |
| bool hasFloatClear() const; |
| bool isFloatAvoider() const; |
| |
| bool isFloatingOrOutOfFlowPositioned() const { return isFloatingPositioned() || isOutOfFlowPositioned(); } |
| |
| const Container* containingBlock() const; |
| virtual const Container& formattingContextRoot() const; |
| const Container& initialContainingBlock() const; |
| |
| bool isDescendantOf(const Container&) const; |
| bool isContainingBlockDescendantOf(const Container&) const; |
| |
| bool isAnonymous() const { return !m_elementAttributes; } |
| |
| bool isBlockLevelBox() const; |
| bool isInlineLevelBox() const; |
| bool isInlineBlockBox() const; |
| bool isBlockContainerBox() const; |
| bool isInitialContainingBlock() const; |
| |
| bool isDocumentBox() const { return m_elementAttributes && m_elementAttributes.value().elementType == ElementType::Document; } |
| bool isBodyBox() const { return m_elementAttributes && m_elementAttributes.value().elementType == ElementType::Body; } |
| bool isTableCell() const { return m_elementAttributes && m_elementAttributes.value().elementType == ElementType::TableCell; } |
| bool isReplaced() const { return isImage() || isIFrame(); } |
| bool isIFrame() const { return m_elementAttributes && m_elementAttributes.value().elementType == ElementType::IFrame; } |
| bool isImage() const { return m_elementAttributes && m_elementAttributes.value().elementType == ElementType::Image; } |
| |
| const Container* parent() const { return m_parent; } |
| const Box* nextSibling() const { return m_nextSibling; } |
| const Box* nextInFlowSibling() const; |
| const Box* nextInFlowOrFloatingSibling() const; |
| const Box* previousSibling() const { return m_previousSibling; } |
| const Box* previousInFlowSibling() const; |
| const Box* previousInFlowOrFloatingSibling() const; |
| |
| bool isContainer() const { return m_baseTypeFlags & ContainerFlag; } |
| bool isBlockContainer() const { return m_baseTypeFlags & BlockContainerFlag; } |
| bool isInlineBox() const { return m_baseTypeFlags & InlineBoxFlag; } |
| bool isInlineContainer() const { return m_baseTypeFlags & InlineContainerFlag; } |
| bool isLineBreakBox() const { return m_baseTypeFlags & LineBreakBoxFlag; } |
| |
| bool isPaddingApplicable() const; |
| bool isOverflowVisible() const; |
| |
| const RenderStyle& style() const { return m_style; } |
| |
| const Replaced* replaced() const { return m_replaced.get(); } |
| // FIXME: Temporary until after intrinsic size change is tracked by Replaced. |
| Replaced* replaced() { return m_replaced.get(); } |
| |
| void setParent(Container& parent) { m_parent = &parent; } |
| void setNextSibling(Box& nextSibling) { m_nextSibling = &nextSibling; } |
| void setPreviousSibling(Box& previousSibling) { m_previousSibling = &previousSibling; } |
| |
| protected: |
| Box(Optional<ElementAttributes>, RenderStyle&&, BaseTypeFlags); |
| |
| private: |
| RenderStyle m_style; |
| Optional<ElementAttributes> m_elementAttributes; |
| |
| Container* m_parent { nullptr }; |
| Box* m_previousSibling { nullptr }; |
| Box* m_nextSibling { nullptr }; |
| |
| std::unique_ptr<Replaced> m_replaced; |
| |
| unsigned m_baseTypeFlags : 6; |
| }; |
| |
| } |
| } |
| |
| #define SPECIALIZE_TYPE_TRAITS_LAYOUT_BOX(ToValueTypeName, predicate) \ |
| SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::Layout::ToValueTypeName) \ |
| static bool isType(const WebCore::Layout::Box& box) { return box.predicate; } \ |
| SPECIALIZE_TYPE_TRAITS_END() |
| |
| #endif |