src/game/level/level_editor/undo_history.h

   1 #ifndef UNDO_HISTORY_H_
   2 #define UNDO_HISTORY_H_
   3
   4 #include "ring_buffer.h"
   5
   6 typedef void (*RevertAction)(void *context, size_t context_size);
   7
   8 typedef struct {
   9     RingBuffer actions;
  10 } UndoHistory;
  11
  12 UndoHistory create_undo_history(void);
  13
  14 static inline
  15 void destroy_undo_history(UndoHistory undo_history)
  16 {
  17     destroy_ring_buffer(undo_history.actions);
  18 }
  19
  20 void undo_history_push(UndoHistory *undo_history,
  21                        RevertAction revert,
  22                        void *context_data,
  23                        size_t context_data_size);
  24 void undo_history_pop(UndoHistory *undo_history);
  25
  26 void undo_history_clean(UndoHistory *undo_history);
  27
  28 static inline
  29 int undo_history_empty(UndoHistory *undo_history)
  30 {
  31     return undo_history->actions.count == 0;
  32 }
  33
  34 #endif  // UNDO_HISTORY_H_