src/apps/mail/KUndoBuffer.h

   1 #ifndef _K_UNDOBUFFER_H
   2 #define _K_UNDOBUFFER_H
   3
   4
   5 #include <List.h>
   6
   7
   8 enum undo_type{
   9         K_INSERTED,
  10         K_DELETED,
  11         K_REPLACED
  12 };
  13
  14
  15 class KUndoItem
  16 {
  17 public:
  18                                                         KUndoItem(const char* text, int32 length,
  19                                                                 int32 offset, undo_type history,
  20                                                                 int32 cursor_pos);
  21                                                         ~KUndoItem();
  22
  23                         void                    Merge(const char* text, int32 length);
  24                         status_t                InitCheck();
  25
  26                         int32                   Offset;
  27                         int32                   Length;
  28                         char*                   RedoText;
  29                         undo_type               History;
  30                         int32                   CursorPos;
  31
  32 private:
  33                         status_t                fStatus;
  34 };
  35
  36
  37 class KUndoBuffer : public BList
  38 {
  39 public:
  40                                                         KUndoBuffer();
  41                                                         ~KUndoBuffer();
  42
  43                         bool                    AddItem(KUndoItem* item, int32 index);
  44                         bool                    AddItem(KUndoItem* item);
  45                         void                    MakeEmpty(void);
  46                         KUndoItem*              RemoveItem(int32 index);
  47                         KUndoItem*              ItemAt(int32 index) const;
  48
  49                         status_t                AddUndo(const char* redo_text, int32 length,
  50                                                                 int32 offset, undo_type history,
  51                                                                 int32 cursor_pos);
  52
  53                         status_t                MakeNewUndoItem();
  54
  55                         status_t                Undo(char** text, int32* length, int32* offset,
  56                                                                 undo_type* history, int32* cursor_pos);
  57
  58                         status_t                Redo(char** text, int32* length, int32* offset,
  59                                                                 undo_type* history, int32* cursor_pos,
  60                                                                 bool* replaced);
  61
  62                         void                    PrintToStream();
  63                         void                    On();
  64                         void                    Off();
  65
  66 private:
  67                         int32                   fIndex;
  68                         bool                    fNewItem;
  69                         bool                    fNoTouch;
  70
  71                         status_t                NewUndo(const char* text, int32 length,
  72                                                                 int32 offset, undo_type history,
  73                                                                 int32 cursor_pos);
  74 };
  75
  76
  77 #endif  // _K_UNDOBUFFER_H
  78