src/game/level/level_editor/undo_history.h

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