src/apps/haikudepot/edits_generic/UndoableEdit.h

   1 /*
   2  * Copyright 2006-2012 Stephan Aßmus <superstippi@gmx.de>
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #ifndef UNDOABLE_EDIT_H
   7 #define UNDOABLE_EDIT_H
   8
   9 #include <Referenceable.h>
  10
  11 class BString;
  12 class EditContext;
  13
  14 class UndoableEdit : public BReferenceable {
  15 public:
  16                                                                 UndoableEdit();
  17         virtual                                         ~UndoableEdit();
  18
  19         virtual status_t                        InitCheck();
  20
  21         virtual status_t                        Perform(EditContext& context);
  22         virtual status_t                        Undo(EditContext& context);
  23         virtual status_t                        Redo(EditContext& context);
  24
  25         virtual void                            GetName(BString& name);
  26
  27         virtual bool                            UndoesPrevious(const UndoableEdit* previous);
  28         virtual bool                            CombineWithNext(const UndoableEdit* next);
  29         virtual bool                            CombineWithPrevious(
  30                                                                         const UndoableEdit* previous);
  31
  32         inline  bigtime_t                       TimeStamp() const
  33                                                                         { return fTimeStamp; }
  34
  35 protected:
  36                         bigtime_t                       fTimeStamp;
  37 };
  38
  39 typedef BReference<UndoableEdit> UndoableEditRef;
  40
  41 #endif // UNDOABLE_EDIT_H