/* * tkUndo.h -- * * Declarations shared among the files that implement an undo * stack. * * Copyright (c) 2002 Ludwig Callewaert. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tkUndo.h,v 1.1.1.1 2007/07/10 15:05:17 duncan Exp $ */ #ifndef _TKUNDO #define _TKUNDO #ifndef _TK #include "tk.h" #endif #ifdef BUILD_tk # undef TCL_STORAGE_CLASS # define TCL_STORAGE_CLASS DLLEXPORT #endif /* enum definining the types used in an undo stack */ typedef enum { TK_UNDO_SEPARATOR, /* Marker */ TK_UNDO_ACTION /* Command */ } TkUndoAtomType; /* struct defining the basic undo/redo stack element */ typedef struct TkUndoAtom { TkUndoAtomType type; /* The type that will trigger the * required action*/ Tcl_Obj * apply; /* Command to apply the action that was taken */ Tcl_Obj * revert; /* The command to undo the action */ struct TkUndoAtom * next; /* Pointer to the next element in the * stack */ } TkUndoAtom; /* struct defining the basic undo/redo stack element */ typedef struct TkUndoRedoStack { TkUndoAtom * undoStack; /* The undo stack */ TkUndoAtom * redoStack; /* The redo stack */ Tcl_Interp * interp ; /* The interpreter in which to execute the revert and apply scripts */ int maxdepth; int depth; } TkUndoRedoStack; /* basic functions */ EXTERN void TkUndoPushStack _ANSI_ARGS_((TkUndoAtom ** stack, TkUndoAtom * elem)); EXTERN TkUndoAtom * TkUndoPopStack _ANSI_ARGS_((TkUndoAtom ** stack)); EXTERN int TkUndoInsertSeparator _ANSI_ARGS_((TkUndoAtom ** stack)); EXTERN void TkUndoClearStack _ANSI_ARGS_((TkUndoAtom ** stack)); /* functions working on an undo/redo stack */ EXTERN TkUndoRedoStack * TkUndoInitStack _ANSI_ARGS_((Tcl_Interp * interp, int maxdepth)); EXTERN void TkUndoSetDepth _ANSI_ARGS_((TkUndoRedoStack * stack, int maxdepth)); EXTERN void TkUndoClearStacks _ANSI_ARGS_((TkUndoRedoStack * stack)); EXTERN void TkUndoFreeStack _ANSI_ARGS_((TkUndoRedoStack * stack)); EXTERN void TkUndoInsertUndoSeparator _ANSI_ARGS_((TkUndoRedoStack * stack)); EXTERN void TkUndoPushAction _ANSI_ARGS_((TkUndoRedoStack * stack, Tcl_DString * actionScript, Tcl_DString * revertScript)); EXTERN int TkUndoRevert _ANSI_ARGS_((TkUndoRedoStack * stack)); EXTERN int TkUndoApply _ANSI_ARGS_((TkUndoRedoStack * stack)); # undef TCL_STORAGE_CLASS # define TCL_STORAGE_CLASS DLLIMPORT #endif /* _TKUNDO */