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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
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 * The Initial Developer of the Original Code is 
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 *
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//
// nsScrollbarFrame
//

#ifndef nsScrollbarFrame_h__
#define nsScrollbarFrame_h__


#include "nsBoxFrame.h"
#include "nsIScrollbarFrame.h"

class nsISupportsArray;
class nsIScrollbarMediator;

nsresult NS_NewScrollbarFrame(nsIPresShell* aPresShell, nsIFrame** aResult) ;

class nsScrollbarFrame : public nsBoxFrame, public nsIScrollbarFrame
{
public:
    nsScrollbarFrame(nsIPresShell* aShell):nsBoxFrame(aShell), mScrollbarMediator(nsnull) {}

#ifdef DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const {
    return MakeFrameName(NS_LITERAL_STRING("ScrollbarFrame"), aResult);
  }
#endif

  // nsIFrame overrides
  NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
                              nsIContent* aChild,
                              PRInt32 aNameSpaceID,
                              nsIAtom* aAttribute,
                              PRInt32 aModType);

  NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
  NS_IMETHOD_(nsrefcnt) AddRef() { return NS_OK; }
  NS_IMETHOD_(nsrefcnt) Release() { return NS_OK; }

   NS_IMETHOD HandlePress(nsIPresContext* aPresContext,
                         nsGUIEvent *    aEvent,
                         nsEventStatus*  aEventStatus);

  NS_IMETHOD HandleMultiplePress(nsIPresContext* aPresContext,
                         nsGUIEvent *    aEvent,
                         nsEventStatus*  aEventStatus);

  NS_IMETHOD HandleDrag(nsIPresContext* aPresContext,
                        nsGUIEvent *    aEvent,
                        nsEventStatus*  aEventStatus);

  NS_IMETHOD HandleRelease(nsIPresContext* aPresContext,
                           nsGUIEvent *    aEvent,
                           nsEventStatus*  aEventStatus);

  NS_IMETHOD Init(nsIPresContext*  aPresContext,
              nsIContent*      aContent,
              nsIFrame*        aParent,
              nsStyleContext*  aContext,
              nsIFrame*        aPrevInFlow);

  NS_IMETHOD Reflow(nsIPresContext*          aPresContext,
                    nsHTMLReflowMetrics&     aDesiredSize,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus&          aStatus);

  virtual PRBool IsContainingBlock() const;

  // nsIScrollbarFrame
  NS_IMETHOD SetScrollbarMediator(nsIScrollbarMediator* aMediator) { mScrollbarMediator = aMediator; return NS_OK; };
  NS_IMETHOD GetScrollbarMediator(nsIScrollbarMediator** aResult) { *aResult = mScrollbarMediator; return NS_OK; };

private:
  nsIScrollbarMediator* mScrollbarMediator;
}; // class nsScrollbarFrame

#endif