support line-by-line undo in text mode

1 files changed, 3 insertions, 2 deletions

diff --git a/gramscii.h b/gramscii.h
index cadde2d..7aa9f62 100644
--- a/gramscii.h
+++ b/gramscii.h
@@ -149,6 +149,8 @@ void get_arrow(FILE *fc);
 void erase(FILE *fc);
 void visual_box(FILE *fc);
 void paste();
+void undo_change();
+void redo_change();
 
 /** file-related functions **/
 void write_file(FILE *fc);
@@ -165,7 +167,6 @@ void ensure_num_lines(lineset_t *ls, int n);
 void yank_region(int x1, int y1, int x2, int y2);
 void paste_region(int x1, int y1);
 void copy_lines_to_ring(int y1, int y2, int which);
-void undo_change();
-void redo_change();
+void invalidate_undo();
 
 #endif