Add a way for control mode clients to subscribe to a format and be

notified of changes rather than having to poll. GitHub issue 2242.

1 files changed, 12 insertions, 0 deletions

diff --git a/tmux.h b/tmux.h
index a8c67051..07dfc0ae 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1722,6 +1722,15 @@ struct client {
 };
 TAILQ_HEAD(clients, client);
 
+/* Control mode subscription type. */
+enum control_sub_type {
+	CONTROL_SUB_SESSION,
+	CONTROL_SUB_PANE,
+	CONTROL_SUB_ALL_PANES,
+	CONTROL_SUB_WINDOW,
+	CONTROL_SUB_ALL_WINDOWS
+};
+
 /* Key binding and key table. */
 struct key_binding {
 	key_code		 key;
@@ -2862,6 +2871,9 @@ void	control_reset_offsets(struct client *);
 void printflike(2, 3) control_write(struct client *, const char *, ...);
 void	control_write_output(struct client *, struct window_pane *);
 int	control_all_done(struct client *);
+void	control_add_sub(struct client *, const char *, enum control_sub_type,
+    	   int, const char *);
+void	control_remove_sub(struct client *, const char *);
 
 /* control-notify.c */
 void	control_notify_input(struct client *, struct window_pane *,