| 1 | /**********************************************************************
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| 2 | *<
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| 3 | FILE: hold.h
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| 4 |
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| 5 | DESCRIPTION:
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| 6 |
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| 7 | CREATED BY: Dan Silva
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| 8 |
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| 9 | HISTORY:
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| 10 |
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| 11 | *> Copyright (c) 1994, All Rights Reserved.
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| 12 | **********************************************************************/
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| 13 |
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| 14 | #ifndef __HOLD__H__
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| 15 | #define __HOLD__H__
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| 16 |
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| 17 | class HoldStore;
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| 18 | class RestoreObj {
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| 19 | friend class HoldStore;
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| 20 | RestoreObj *next,*prev;
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| 21 | public:
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| 22 | RestoreObj() { next = prev = NULL; }
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| 23 | virtual ~RestoreObj() {};
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| 24 | virtual void Restore(int isUndo)=0;
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| 25 | virtual void Redo()=0;
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| 26 | virtual int Size() { return 1; }
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| 27 | virtual void EndHold() { }
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| 28 | virtual TSTR Description() { return TSTR(_T("---")); }
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| 29 | };
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| 30 |
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| 31 | class Hold {
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| 32 | HoldStore *holdStore, *holdList;
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| 33 | int undoEnabled;
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| 34 | int superLevel;
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| 35 | HoldStore *ResetStore();
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| 36 | void Init();
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| 37 | public:
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| 38 | CoreExport Hold();
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| 39 | CoreExport ~Hold();
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| 40 | CoreExport void Put(RestoreObj *rob);
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| 41 | CoreExport void Begin();
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| 42 | CoreExport void Suspend(); // temporarly suspend holding
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| 43 | CoreExport void Resume(); // resume holding
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| 44 | CoreExport int Holding(); // are we holding?
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| 45 | CoreExport void DisableUndo(); // prevents Undo when Accept is called.
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| 46 | CoreExport void EnableUndo();
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| 47 | CoreExport void Restore(); // Restore changes from holdStore.
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| 48 | CoreExport void Release(); // Tosses out holdStore.
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| 49 |
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| 50 | // 3 ways to terminate the Begin()...
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| 51 | CoreExport void End(); // toss holdStore.
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| 52 | CoreExport void Accept(int nameID); // record Undo (if enabled), End();
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| 53 | CoreExport void Accept(TCHAR *name);
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| 54 | CoreExport void Cancel(); // Restore changes, End()
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| 55 |
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| 56 | //
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| 57 | // Group several Begin-End lists into a single Super-group.
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| 58 | CoreExport void SuperBegin();
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| 59 | CoreExport void SuperAccept(int nameID);
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| 60 | CoreExport void SuperAccept(TCHAR *name);
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| 61 | CoreExport void SuperCancel();
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| 62 | };
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| 63 |
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| 64 |
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| 65 |
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| 66 | extern CoreExport Hold theHold;
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| 67 |
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| 68 | void CoreExport EnableUndoDebugPrintout(BOOL onoff);
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| 69 |
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| 70 |
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| 71 | #endif //__HOLD__H__
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