From b91086a5c80fd854f28f47d93aff5d85a886a7ff Mon Sep 17 00:00:00 2001
From: nicm <nicm@openbsd.org>
Date: Mon, 13 Jul 2026 15:03:03 +0000
Subject: [PATCH] Add pane-activity event.

---
 input.c         |  6 +++++-
 options-table.c |  3 ++-
 server-client.c |  5 +++--
 tmux.1          | 11 +++--------
 tmux.h          |  3 ++-
 5 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/input.c b/input.c
index 46e7b91aa..66f65e01c 100644
--- a/input.c
+++ b/input.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: input.c,v 1.267 2026/07/13 13:01:14 nicm Exp $ */
+/* $OpenBSD: input.c,v 1.268 2026/07/13 15:03:03 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1051,6 +1051,10 @@ input_parse_buffer(struct window_pane *wp, const u_char *buf, size_t len)
 		return;
 
 	window_update_activity(wp->window);
+	if (~wp->flags & PANE_ACTIVITY) {
+		wp->flags |= PANE_ACTIVITY;
+		events_fire_pane("pane-activity", wp);
+	}
 	wp->flags |= PANE_CHANGED;
 
 	/* Flag new input while in a mode. */
diff --git a/options-table.c b/options-table.c
index 3e8dd5b46..a36901dcb 100644
--- a/options-table.c
+++ b/options-table.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: options-table.c,v 1.234 2026/07/13 13:01:14 nicm Exp $ */
+/* $OpenBSD: options-table.c,v 1.235 2026/07/13 15:03:03 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1936,6 +1936,7 @@ const struct options_table_entry options_table[] = {
 	OPTIONS_TABLE_HOOK("client-dark-theme", ""),
 	OPTIONS_TABLE_HOOK("command-error", ""),
 	OPTIONS_TABLE_HOOK("marked-pane-changed", ""),
+	OPTIONS_TABLE_PANE_HOOK("pane-activity", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-bell", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-command-finished", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-command-started", ""),
diff --git a/server-client.c b/server-client.c
index 971b8d1aa..f28c80f85 100644
--- a/server-client.c
+++ b/server-client.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: server-client.c,v 1.487 2026/07/13 13:01:14 nicm Exp $ */
+/* $OpenBSD: server-client.c,v 1.488 2026/07/13 15:03:03 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1812,7 +1812,8 @@ server_client_loop(void)
 				server_client_check_pane_resize(wp);
 				server_client_check_pane_buffer(wp);
 			}
-			wp->flags &= ~(PANE_REDRAW|PANE_REDRAWSCROLLBAR);
+			wp->flags &= ~(PANE_REDRAW|PANE_REDRAWSCROLLBAR|
+			    PANE_ACTIVITY);
 		}
 		check_window_name(w);
 	}
diff --git a/tmux.1 b/tmux.1
index 3b4b228f6..cddeaac3b 100644
--- a/tmux.1
+++ b/tmux.1
@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.1134 2026/07/13 13:01:14 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.1135 2026/07/13 15:03:03 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 .\"
@@ -6378,17 +6378,12 @@ Run when a client switches to a dark theme.
 Run when a command fails.
 .It marked\-pane\-changed
 Run when the marked pane is set or cleared.
+.It pane\-activity
+Run when there is new output in a pane.
 .It pane\-bell
 Run when a pane receives a bell.
 .It pane\-command\-finished
 Run when an OSC 133 command finishes in a pane.
-The event payload includes
-.Ql hook_command_start_time ,
-.Ql hook_command_end_time ,
-.Ql hook_command_duration
-and
-.Ql hook_command_status
-if present.
 .It pane\-command\-started
 Run when an OSC 133 command starts in a pane.
 .It pane\-created
diff --git a/tmux.h b/tmux.h
index db6d4cf4e..d954d6388 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1399 2026/07/13 13:01:14 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1400 2026/07/13 15:03:03 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1268,6 +1268,7 @@ struct window_pane {
 #define PANE_REDRAWSCROLLBAR 0x8000
 #define PANE_DESTROYED 0x10000
 #define PANE_CMDRUNNING 0x20000
+#define PANE_ACTIVITY 0x40000
 
 	bitstr_t	*sync_dirty;
 	u_int		 sync_dirty_size;