src/apps/haikudepot/edits_generic/EditManager.h

   1 /*
   2  * Copyright 2006-2012, Stephan Aßmus <superstippi@gmx.de>
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef EDIT_MANAGER_H
   6 #define EDIT_MANAGER_H
   7
   8 #include "EditStack.h"
   9 #include "UndoableEdit.h"
  10
  11 class BString;
  12 class EditContext;
  13
  14
  15 class EditManager {
  16 public:
  17         class Listener {
  18         public:
  19                 virtual                                 ~Listener();
  20                 virtual void                    EditManagerChanged(
  21                                                                         const EditManager* manager) = 0;
  22         };
  23
  24 public:
  25                                                                 EditManager();
  26         virtual                                         ~EditManager();
  27
  28                         status_t                        Perform(UndoableEdit* edit,
  29                                                                         EditContext& context);
  30                         status_t                        Perform(const UndoableEditRef& edit,
  31                                                                         EditContext& context);
  32
  33                         status_t                        Undo(EditContext& context);
  34                         status_t                        Redo(EditContext& context);
  35
  36                         bool                            GetUndoName(BString& name);
  37                         bool                            GetRedoName(BString& name);
  38
  39                         void                            Clear();
  40                         void                            Save();
  41                         bool                            IsSaved();
  42
  43                         bool                            AddListener(Listener* listener);
  44                         void                            RemoveListener(Listener* listener);
  45
  46 private:
  47                         status_t                        _AddEdit(const UndoableEditRef& edit);
  48
  49                         void                            _NotifyListeners();
  50
  51 private:
  52                         EditStack                       fUndoHistory;
  53                         EditStack                       fRedoHistory;
  54                         UndoableEditRef         fEditAtSave;
  55
  56         typedef List<Listener*, true, 4> ListenerList;
  57                         ListenerList            fListeners;
  58 };
  59
  60 #endif // EDIT_MANAGER_H