feautre: added undo/redo buttons

The change history is kept in a ring buffer of definite size 2000.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/user.c b/src/user.c
index 0261c65..927e852 100644
--- a/src/user.c
+++ b/src/user.c
@@ -12,6 +12,7 @@
 #include "cdraw.h"
 #include "types.h"
 #include "tools.h"
+#include "action.h"
 #include "canvas.h"
 #include "palette.h"
 
@@ -242,3 +243,19 @@ choose_file_path(const char *prompt, char *input)
 
 	if (ft != stdin) pclose(ft);
 }
+
+void
+user_canvas_undo(const Arg *x)
+{
+	if (cur_canvas == NULL) return;
+	action_undo(cur_canvas);
+	ui_redraw_panel(UI_PANELTYPE_CANVAS);
+}
+
+void
+user_canvas_redo(const Arg *x)
+{
+	if (cur_canvas == NULL) return;
+	action_redo(cur_canvas);
+	ui_redraw_panel(UI_PANELTYPE_CANVAS);
+}