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26 #ifndef RenderScrollbarPart_h
27 #define RenderScrollbarPart_h
29 #include "RenderBlock.h"
30 #include "ScrollTypes.h"
34 class RenderScrollbar;
36 class RenderScrollbarPart FINAL : public RenderBlock {
38 RenderScrollbarPart(Document&, RenderScrollbar* = 0, ScrollbarPart = NoPart);
40 virtual ~RenderScrollbarPart();
42 virtual const char* renderName() const { return "RenderScrollbarPart"; }
44 virtual bool requiresLayer() const { return false; }
46 virtual void layout();
48 void paintIntoRect(GraphicsContext*, const LayoutPoint&, const LayoutRect&);
50 // Scrollbar parts needs to be rendered at device pixel boundaries.
51 virtual LayoutUnit marginTop() const OVERRIDE { ASSERT(isIntegerValue(m_marginBox.top())); return m_marginBox.top(); }
52 virtual LayoutUnit marginBottom() const OVERRIDE { ASSERT(isIntegerValue(m_marginBox.bottom())); return m_marginBox.bottom(); }
53 virtual LayoutUnit marginLeft() const OVERRIDE { ASSERT(isIntegerValue(m_marginBox.left())); return m_marginBox.left(); }
54 virtual LayoutUnit marginRight() const OVERRIDE { ASSERT(isIntegerValue(m_marginBox.right())); return m_marginBox.right(); }
56 virtual bool isRenderScrollbarPart() const { return true; }
57 RenderBox* rendererOwningScrollbar() const;
60 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
61 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
64 virtual void computePreferredLogicalWidths();
66 void layoutHorizontalPart();
67 void layoutVerticalPart();
69 void computeScrollbarWidth();
70 void computeScrollbarHeight();
72 RenderScrollbar* m_scrollbar;
76 RENDER_OBJECT_TYPE_CASTS(RenderScrollbarPart, isRenderScrollbarPart())
78 } // namespace WebCore
80 #endif // RenderScrollbarPart_h