remove warnings and add autofocus

include/focus.h

@@ -3,5 +3,6 @@
 #include "types.h"
 
 void focus_toplevel(struct absinthe_toplevel *toplevel);
+struct absinthe_toplevel *focus_get_topmost(struct absinthe_server *server);
 void focus_next(struct absinthe_server *server);
 void focus_prev(struct absinthe_server *server);

include/types.h

@@ -24,6 +24,8 @@
 
 #include "config.h"
 
+#define UNUSED(x) (void)(x)
+
 enum absinthe_cursor_mode {
 	ABSINTHE_CURSOR_PASSTHROUGH,
 	ABSINTHE_CURSOR_MOVE,
@@ -95,7 +97,7 @@ struct absinthe_server {
 
 	enum absinthe_cursor_mode cursor_mode;
 	struct wlr_box grabbed_geometry;
-	uint32_t grab_x, grab_y;
+	int32_t grab_x, grab_y;
 	enum absinthe_cursor_resize_corner cursor_resize_corner;
 
 	struct wl_list toplevels;