src/src/Data/History/archiver.hpp

   1
   2 /******************************************************************************
   3 * MODULE     : archiver.hpp
   4 * DESCRIPTION: undo/redo history
   5 * COPYRIGHT  : (C) 2009  Joris van der Hoeven
   6 *******************************************************************************
   7 * This software falls under the GNU general public license version 3 or later.
   8 * It comes WITHOUT ANY WARRANTY WHATSOEVER. For details, see the file LICENSE
   9 * in the root directory or <http://www.gnu.org/licenses/gpl-3.0.html>.
  10 ******************************************************************************/
  11
  12 #ifndef ARCHIVER_H
  13 #define ARCHIVER_H
  14 #include "patch.hpp"
  15
  16 class archiver_rep: public concrete_struct {
  17   patch archive;        // undo and redo archive
  18   patch current;        // current sequence of modifications
  19   int   depth;          // archive depth
  20   int   last_save;      // archive depth at last save
  21   int   last_autosave;  // archive depth at last autosave
  22
  23 protected:
  24   void apply (patch p);
  25   void show_all ();
  26
  27 public:
  28   archiver_rep ();
  29   ~archiver_rep ();
  30   void clear ();
  31
  32   void add (patch p);
  33   void start_slave (double a);
  34   bool active ();
  35   bool has_history ();
  36   void cancel ();    // cancel current series of modifications
  37   void confirm ();   // move current modifications to history
  38   void retract ();   // reopen last history item for further modifications
  39   void forget ();    // undo and forget about last history item
  40   void simplify ();
  41
  42   int  undo_possibilities ();
  43   int  redo_possibilities ();
  44   path undo_one (int i);
  45   path redo_one (int i);
  46   path undo (int i=0);
  47   path redo (int i=0);
  48
  49   void require_save ();
  50   void require_autosave ();
  51   void notify_save ();
  52   void notify_autosave ();
  53   bool conform_save ();
  54   bool conform_autosave ();
  55 };
  56
  57 class archiver {
  58 CONCRETE (archiver);
  59   archiver ();
  60 };
  61 CONCRETE_CODE (archiver);
  62
  63 #endif // defined ARCHIVER_H