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30 #ifndef RenderRegion_h
31 #define RenderRegion_h
33 #include "RenderReplaced.h"
38 class RenderBoxRegionInfo;
39 class RenderFlowThread;
41 class RenderRegion : public RenderReplaced {
43 explicit RenderRegion(Node*, RenderFlowThread*);
44 virtual ~RenderRegion();
46 virtual bool isRenderRegion() const { return true; }
48 virtual void paintReplaced(PaintInfo&, const LayoutPoint&);
49 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset, HitTestAction);
51 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
53 void setRegionRect(const LayoutRect& rect) { m_regionRect = rect; }
54 LayoutRect regionRect() const { return m_regionRect; }
55 LayoutRect regionOverflowRect() const;
60 RenderFlowThread* parentFlowThread() const { return m_parentFlowThread; }
62 // Valid regions do not create circular dependencies with other flows.
63 bool isValid() const { return m_isValid; }
64 void setIsValid(bool valid) { m_isValid = valid; }
66 bool hasCustomRegionStyle() const { return m_hasCustomRegionStyle; }
67 void setHasCustomRegionStyle(bool hasCustomRegionStyle) { m_hasCustomRegionStyle = hasCustomRegionStyle; }
69 virtual void layout();
71 RenderBoxRegionInfo* renderBoxRegionInfo(const RenderBox*) const;
72 RenderBoxRegionInfo* setRenderBoxRegionInfo(const RenderBox*, LayoutUnit logicalLeftInset, LayoutUnit logicalRightInset,
73 bool containingBlockChainIsInset);
74 RenderBoxRegionInfo* takeRenderBoxRegionInfo(const RenderBox*);
75 void removeRenderBoxRegionInfo(const RenderBox*);
77 void deleteAllRenderBoxRegionInfo();
79 LayoutUnit offsetFromLogicalTopOfFirstPage() const;
81 bool isFirstRegion() const;
82 bool isLastRegion() const;
85 virtual const char* renderName() const { return "RenderRegion"; }
87 RenderFlowThread* m_flowThread;
89 // If this RenderRegion is displayed as part of another flow,
90 // we need to create a dependency tree, so that layout of the
91 // regions is always done before the regions themselves.
92 RenderFlowThread* m_parentFlowThread;
93 LayoutRect m_regionRect;
95 // This map holds unique information about a block that is split across regions.
96 // A RenderBoxRegionInfo* tells us about any layout information for a RenderBox that
97 // is unique to the region. For now it just holds logical width information for RenderBlocks, but eventually
98 // it will also hold a custom style for any box (for region styling).
99 HashMap<const RenderBox*, RenderBoxRegionInfo*> m_renderBoxRegionInfo;
102 bool m_hasCustomRegionStyle;
105 inline RenderRegion* toRenderRegion(RenderObject* object)
107 ASSERT(!object || object->isRenderRegion());
108 return static_cast<RenderRegion*>(object);
111 inline const RenderRegion* toRenderRegion(const RenderObject* object)
113 ASSERT(!object || object->isRenderRegion());
114 return static_cast<const RenderRegion*>(object);
117 // This will catch anyone doing an unnecessary cast.
118 void toRenderRegion(const RenderRegion*);
120 } // namespace WebCore
122 #endif // RenderRegion_h