gecko/layout/generic/nsIFrameFrame.h

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/*
 * interface for rendering objects for replaced elements containing a
 * document, such as <frame>, <iframe>, and some <object>s
 */

#ifndef nsIFrameFrame_h___
#define nsIFrameFrame_h___

class nsIDocShell;

class nsIFrameFrame
{
public:
  NS_DECLARE_FRAME_ACCESSOR(nsIFrameFrame)

  NS_IMETHOD GetDocShell(nsIDocShell **aDocShell) = 0;

  /**
   * Only allowed to fail if the other frame is not the same type as
   * this one or if one of the frames has no docshell.  Don't call
   * EndSwapDocShells() unless BeginSwapDocShells() succeeds.
   */
  NS_IMETHOD BeginSwapDocShells(nsIFrame* aOther) = 0;
  virtual void EndSwapDocShells(nsIFrame* aOther) = 0;
};

#endif