mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 14:45:29 +00:00
34 lines
1.0 KiB
C++
34 lines
1.0 KiB
C++
/*
|
|
* interface for rendering objects whose state is saved in
|
|
* session-history (back-forward navigation)
|
|
*/
|
|
|
|
#ifndef _nsIStatefulFrame_h
|
|
#define _nsIStatefulFrame_h
|
|
|
|
#include "nsQueryFrame.h"
|
|
|
|
class nsPresState;
|
|
|
|
class nsIStatefulFrame
|
|
{
|
|
public:
|
|
NS_DECL_QUERYFRAME_TARGET(nsIStatefulFrame)
|
|
|
|
// If you create a special type stateful frame (e.g. scroll) that needs
|
|
// to be captured outside of the standard pass through the frames, you'll need
|
|
// a special ID by which to refer to that type.
|
|
enum SpecialStateID {eNoID=0, eDocumentScrollState};
|
|
|
|
// Save the state for this frame. Some implementations may choose to return
|
|
// different states depending on the value of aStateID. If this method
|
|
// succeeds, the caller is responsible for deleting the resulting state when
|
|
// done with it.
|
|
NS_IMETHOD SaveState(SpecialStateID aStateID, nsPresState** aState) = 0;
|
|
|
|
// Restore the state for this frame from aState
|
|
NS_IMETHOD RestoreState(nsPresState* aState) = 0;
|
|
};
|
|
|
|
#endif /* _nsIStatefulFrame_h */
|