RenderScrollbarPart.h [plain text]
#ifndef RenderScrollbarPart_h
#define RenderScrollbarPart_h
#include "RenderBlock.h"
#include "ScrollTypes.h"
namespace WebCore {
class RenderScrollbar;
class RenderScrollbarPart : public RenderBlock {
public:
RenderScrollbarPart(Node*, RenderScrollbar* = 0, ScrollbarPart = NoPart);
virtual ~RenderScrollbarPart();
virtual const char* renderName() const { return "RenderScrollbarPart"; }
virtual bool requiresLayer() const { return false; }
virtual void layout();
virtual void computePreferredLogicalWidths();
void paintIntoRect(GraphicsContext*, const LayoutPoint&, const LayoutRect&);
virtual LayoutUnit marginTop() const { ASSERT(isIntegerValue(m_marginTop)); return m_marginTop; }
virtual LayoutUnit marginBottom() const { ASSERT(isIntegerValue(m_marginBottom)); return m_marginBottom; }
virtual LayoutUnit marginLeft() const { ASSERT(isIntegerValue(m_marginLeft)); return m_marginLeft; }
virtual LayoutUnit marginRight() const { ASSERT(isIntegerValue(m_marginRight)); return m_marginRight; }
virtual bool isRenderScrollbarPart() const { return true; }
RenderObject* rendererOwningScrollbar() const;
protected:
virtual void styleWillChange(StyleDifference diff, const RenderStyle* newStyle);
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
private:
void layoutHorizontalPart();
void layoutVerticalPart();
void computeScrollbarWidth();
void computeScrollbarHeight();
RenderScrollbar* m_scrollbar;
ScrollbarPart m_part;
};
inline RenderScrollbarPart* toRenderScrollbarPart(RenderObject* object)
{
ASSERT(!object || object->isRenderScrollbarPart());
return static_cast<RenderScrollbarPart*>(object);
}
inline const RenderScrollbarPart* toRenderScrollbarPart(const RenderObject* object)
{
ASSERT(!object || object->isRenderScrollbarPart());
return static_cast<const RenderScrollbarPart*>(object);
}
void toRenderScrollbarPart(const RenderScrollbarPart*);
}
#endif // RenderScrollbarPart_h