Emit an event (ui_draw) immediately before drawing the screen

This allows better control over styling, as well as potential for
entirely new UI elements implemented entirely using the Lua API.

1 files changed, 13 insertions, 1 deletions

diff --git a/vis-lua.c b/vis-lua.c
index 3d80293..91ee428 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -166,7 +166,7 @@ void vis_lua_win_status(Vis *vis, Win *win) { window_status_update(vis, win); }
 void vis_lua_term_csi(Vis *vis, const long *csi) { }
 void vis_lua_process_response(Vis *vis, const char *name,
                               char *buffer, size_t len, ResponseType rtype) { }
-
+void vis_lua_ui_draw(Vis *vis) { }
 
 #else
 
@@ -3689,4 +3689,16 @@ void vis_lua_process_response(Vis *vis, const char *name,
 	lua_pop(L, 1);
 }
 
+/***
+ * Emitted immediately before the UI is drawn to the screen.
+ * Allows last-minute overrides to the styling of UI elements.
+ *
+ * *WARNING:* This is emitted every screen draw!
+ * Use sparingly and check for `nil` values!
+ * @function ui_draw
+ */
+void vis_lua_ui_draw(Vis *vis) {
+	vis_lua_event_call(vis, "ui_draw");
+}
+
 #endif