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28 #if ENABLE(LAYOUT_FORMATTING_CONTEXT)
30 #include "FloatingState.h"
31 #include "LayoutUnit.h"
32 #include <wtf/IsoMalloc.h>
33 #include <wtf/WeakPtr.h>
41 class FormattingState;
44 class FormattingContext {
45 WTF_MAKE_ISO_ALLOCATED(FormattingContext);
47 FormattingContext(const Box& formattingContextRoot, LayoutContext&);
48 virtual ~FormattingContext();
50 virtual void layout(LayoutContext&, FormattingState&) const = 0;
51 virtual std::unique_ptr<FormattingState> createFormattingState(Ref<FloatingState>&&) const = 0;
52 virtual Ref<FloatingState> createOrFindFloatingState() const = 0;
55 const Box& root() const { return *m_root; }
56 const LayoutContext& layoutContext() const { return m_layoutContext; }
58 virtual void computeStaticPosition(const Box&) const;
59 virtual void computeInFlowPositionedPosition(const Box&) const;
60 virtual void computeOutOfFlowPosition(const Box&) const;
62 virtual void computeWidth(const Box&) const;
63 virtual void computeHeight(const Box&) const;
65 virtual void computeOutOfFlowWidth(const Box&) const;
66 virtual void computeFloatingWidth(const Box&) const;
67 virtual void computeInFlowWidth(const Box&) const = 0;
69 virtual void computeOutOfFlowHeight(const Box&) const;
70 virtual void computeFloatingHeight(const Box&) const;
71 virtual void computeInFlowHeight(const Box&) const = 0;
73 virtual LayoutUnit marginTop(const Box&) const;
74 virtual LayoutUnit marginLeft(const Box&) const;
75 virtual LayoutUnit marginBottom(const Box&) const;
76 virtual LayoutUnit marginRight(const Box&) const;
78 void placeInFlowPositionedChildren(const Container&) const;
79 void layoutOutOfFlowDescendants() const;
83 LayoutContext& m_layoutContext;