src/game/level/level_editor/undo_history.h

   1 #ifndef UNDO_HISTORY_H_
   2 #define UNDO_HISTORY_H_
   3
   4 #include "layer.h"
   5
   6 #define CONTEXT_SIZE 256
   7
   8 #define ASSERT_CONTEXT_SIZE(context)               \
   9     trace_assert(sizeof(context) <= CONTEXT_SIZE)
  10
  11 typedef struct {
  12     char data[CONTEXT_SIZE];
  13 } Context;
  14
  15 typedef void (*RevertAction)(void *layer, Context context);
  16
  17 typedef struct {
  18     void *layer;
  19     Context context;
  20     RevertAction revert;
  21 } Action;
  22
  23 typedef struct UndoHistory UndoHistory;
  24
  25 UndoHistory *create_undo_history(void);
  26 void destroy_undo_history(UndoHistory *undo_history);
  27
  28 void undo_history_push(UndoHistory *undo_history, Action action);
  29 void undo_history_pop(UndoHistory *undo_history);
  30
  31 #endif  // UNDO_HISTORY_H_