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30 #ifndef RenderRegion_h
31 #define RenderRegion_h
33 #include "core/rendering/RenderBlockFlow.h"
34 #include "core/rendering/style/StyleInheritedData.h"
39 typedef Vector<LayerFragment, 1> LayerFragments;
40 class RenderFlowThread;
42 class RenderRegion : public RenderBlockFlow {
44 explicit RenderRegion(Element*, RenderFlowThread*);
46 virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRenderRegion || RenderBlockFlow::isOfType(type); }
48 void setFlowThreadPortionRect(const LayoutRect& rect) { m_flowThreadPortionRect = rect; }
49 LayoutRect flowThreadPortionRect() const { return m_flowThreadPortionRect; }
50 LayoutRect flowThreadPortionOverflowRect() const;
52 RenderFlowThread* flowThread() const { return m_flowThread; }
54 // Valid regions do not create circular dependencies with other flows.
55 bool isValid() const { return m_isValid; }
56 void setIsValid(bool valid) { m_isValid = valid; }
58 bool isFirstRegion() const;
59 bool isLastRegion() const;
61 // These methods represent the width and height of a "page" and for a RenderRegion they are just
62 // the content width and content height of a region. For RenderMultiColumnSets, however, they
63 // will be the width and height of a single column or page in the set.
64 virtual LayoutUnit pageLogicalWidth() const;
65 virtual LayoutUnit pageLogicalHeight() const;
67 virtual bool canHaveChildren() const override final { return false; }
68 virtual bool canHaveGeneratedChildren() const override final { return true; }
70 virtual const char* renderName() const override { return "RenderRegion"; }
73 virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override final;
75 LayoutRect overflowRectForFlowThreadPortion(const LayoutRect& flowThreadPortionRect, bool isFirstPortion, bool isLastPortion) const;
76 void paintInvalidationOfFlowThreadContentRectangle(const LayoutRect& paintInvalidationRect, const LayoutRect& flowThreadPortionRect,
77 const LayoutRect& flowThreadPortionOverflowRect, const LayoutPoint& regionLocation) const;
80 virtual void layoutBlock(bool relayoutChildren) override final;
83 RenderFlowThread* m_flowThread;
86 LayoutRect m_flowThreadPortionRect;
90 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderRegion, isRenderRegion());
94 #endif // RenderRegion_h