gecko-dev/layout/generic/nsIStatefulFrame.h
2000-06-14 23:37:06 +00:00

39 lines
1.3 KiB
C++

#ifndef _nsIStatefulFrame_h
#define _nsIStatefulFrame_h
#include "nsISupports.h"
class nsIPresContext;
class nsIPresState;
#define NS_ISTATEFULFRAME_IID_STR "306c8ca0-5f0c-11d3-a9fb-000064657374"
#define NS_ISTATEFULFRAME_IID \
{0x306c8ca0, 0x5f0c, 0x11d3, \
{0xa9, 0xfb, 0x00, 0x00, 0x64, 0x65, 0x73, 0x74}}
class nsIStatefulFrame : public nsISupports {
public:
NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISTATEFULFRAME_IID)
// If you implement nsIStatefulFrame, add an entry to this enum and use it
// in your GetStateType method to prevent collisions.
enum StateType {eNoType=-1, eCheckboxType, eFileType, eRadioType, eSelectType,
eTextType, eScrollType, eNumStateTypes};
// 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.
//
// There is space reserved between standard ID's and special ID's by the
// offset NS_CONTENT_ID_COUNTER_BASE
enum SpecialStateID {eNoID=0, eDocumentScrollState};
NS_IMETHOD GetStateType(nsIPresContext* aPresContext, nsIStatefulFrame::StateType* aStateType) = 0;
NS_IMETHOD SaveState(nsIPresContext* aPresContext, nsIPresState** aState) = 0;
NS_IMETHOD RestoreState(nsIPresContext* aPresContext, nsIPresState* aState) = 0;
};
#endif /* _nsIStatefulFrame_h */