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 * The Original Code is mozilla.org code.
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 * The Initial Developer of the Original Code is 
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#ifndef nsSplittableFrame_h___
#define nsSplittableFrame_h___

#include "nsFrame.h"

// Derived class that allows splitting
class nsSplittableFrame : public nsFrame
{
public:
  NS_IMETHOD Init(nsIPresContext*  aPresContext,
                  nsIContent*      aContent,
                  nsIFrame*        aParent,
                  nsStyleContext*  aContext,
                  nsIFrame*        aPrevInFlow);
  
  NS_IMETHOD  IsSplittable(nsSplittableType& aIsSplittable) const;

  NS_IMETHOD Destroy(nsIPresContext* aPresContext);

  // Flow member functions.
  NS_IMETHOD  GetPrevInFlow(nsIFrame** aPrevInFlow) const;
  NS_IMETHOD  SetPrevInFlow(nsIFrame*);
  NS_IMETHOD  GetNextInFlow(nsIFrame** aNextInFlow) const;
  NS_IMETHOD  SetNextInFlow(nsIFrame*);

  /**
   * Return the first frame in our current flow. 
   */
  virtual nsIFrame* GetFirstInFlow() const;

  /**
   * Return the last frame in our current flow.
   */
  virtual nsIFrame* GetLastInFlow() const;

  // Remove the frame from the flow. Connects the frame's prev-in-flow
  // and its next-in-flow
  static void RemoveFromFlow(nsIFrame* aFrame);
  
  // Detach from previous frame in flow
  static void BreakFromPrevFlow(nsIFrame* aFrame);

  nsIFrame*   GetPrevInFlow();
  nsIFrame*   GetNextInFlow();

protected:
#ifdef DEBUG
  virtual void DumpBaseRegressionData(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent, PRBool aIncludeStyleData);
#endif

  nsIFrame*   mPrevInFlow;
  nsIFrame*   mNextInFlow;
};

#endif /* nsSplittableFrame_h___ */