Add an option to alert (monitor) for silence (lack of activity) in a

window. From Thomas Adam.

cmd-choose-window.c

@@ -87,6 +87,8 @@ cmd_choose_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 			flag = '!';
 		else if (wm->flags & WINLINK_CONTENT)
 			flag = '+';
+		else if (wm->flags & WINLINK_SILENCE)
+			flag = '~';
 		else if (wm == s->curw)
 			flag = '*';
 		else if (wm == TAILQ_FIRST(&s->lastw))

cmd-set-option.c

@@ -136,6 +136,7 @@ const struct set_option_entry set_session_option_table[] = {
 	{ "visual-activity", SET_OPTION_FLAG, 0, 0, NULL },
 	{ "visual-bell", SET_OPTION_FLAG, 0, 0, NULL },
 	{ "visual-content", SET_OPTION_FLAG, 0, 0, NULL },
+	{ "visual-silence", SET_OPTION_FLAG, 0, 0, NULL },
 	{ NULL, 0, 0, 0, NULL }
 };
 
@@ -157,6 +158,7 @@ const struct set_option_entry set_window_option_table[] = {
 	{ "mode-mouse", SET_OPTION_FLAG, 0, 0, NULL },
 	{ "monitor-activity", SET_OPTION_FLAG, 0, 0, NULL },
 	{ "monitor-content", SET_OPTION_STRING, 0, 0, NULL },
+	{ "monitor-silence",SET_OPTION_NUMBER, 0, INT_MAX, NULL},
 	{ "remain-on-exit", SET_OPTION_FLAG, 0, 0, NULL },
 	{ "synchronize-panes", SET_OPTION_FLAG, 0, 0, NULL },
 	{ "utf8", SET_OPTION_FLAG, 0, 0, NULL },

input.c

@@ -681,7 +681,9 @@ input_parse(struct window_pane *wp)
 
 	if (EVBUFFER_LENGTH(evb) == 0)
 		return;
+
 	wp->window->flags |= WINDOW_ACTIVITY;
+	wp->window->flags &= ~WINDOW_SILENCE;
 
 	/*
 	 * Open the screen. Use NULL wp if there is a mode set as don't want to

server-window.c

@@ -26,6 +26,7 @@
 int	server_window_backoff(struct window_pane *);
 int	server_window_check_bell(struct session *, struct winlink *);
 int	server_window_check_activity(struct session *, struct winlink *);
+int	server_window_check_silence(struct session *, struct winlink *);
 int	server_window_check_content(
 	    struct session *, struct winlink *, struct window_pane *);
 
@@ -53,7 +54,8 @@ server_window_loop(void)
 				continue;
 
 			if (server_window_check_bell(s, wl) ||
-			    server_window_check_activity(s, wl))
+			    server_window_check_activity(s, wl) ||
+			    server_window_check_silence(s, wl))
 				server_status_session(s);
 			TAILQ_FOREACH(wp, &w->panes, entry)
 				server_window_check_content(s, wl, wp);
@@ -151,6 +153,55 @@ server_window_check_activity(struct session *s, struct winlink *wl)
 	return (1);
 }
 
+/* Check for silence in window. */
+int
+server_window_check_silence(struct session *s, struct winlink *wl)
+{
+	struct client	*c;
+	struct window	*w = wl->window;
+	struct timeval	 timer;
+	u_int		 i;
+	int		 silence_interval, timer_difference;
+
+	if (!(w->flags & WINDOW_SILENCE) || wl->flags & WINLINK_SILENCE)
+		return (0);
+
+	if (s->curw == wl) {
+		/*
+		 * Reset the timer for this window if we've focused it.  We
+		 * don't want the timer tripping as soon as we've switched away
+		 * from this window.
+		 */
+		if (gettimeofday(&w->silence_timer, NULL) != 0)
+			fatal("gettimeofday failed.");
+
+		return (0);
+	}
+
+	silence_interval = options_get_number(&w->options, "monitor-silence");
+	if (silence_interval == 0)
+		return (0);
+
+	if (gettimeofday(&timer, NULL) != 0)
+		fatal("gettimeofday");
+	timer_difference = timer.tv_sec - w->silence_timer.tv_sec;
+	if (timer_difference <= silence_interval)
+		return (0);
+	wl->flags |= WINLINK_SILENCE;
+
+	if (options_get_number(&s->options, "visual-silence")) {
+		for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+			c = ARRAY_ITEM(&clients, i);
+			if (c == NULL || c->session != s)
+				continue;
+			status_message_set(c, "Silence in window %u",
+			    winlink_find_by_window(&s->windows, w)->idx);
+		}
+	}
+
+	return (1);
+}
+
 /* Check for content change in window. */
 int
 server_window_check_content(

status.c

@@ -395,6 +395,8 @@ status_replace1(struct client *c,struct winlink *wl,
 			tmp[0] = '!';
 		else if (wl->flags & WINLINK_ACTIVITY)
 			tmp[0] = '#';
+		else if (wl->flags & WINLINK_SILENCE)
+			tmp[0] = '~';
 		else if (wl == s->curw)
 			tmp[0] = '*';
 		else if (wl == TAILQ_FIRST(&s->lastw))

tmux.1

@@ -2053,6 +2053,12 @@ display a message when content is present in a window
 for which the
 .Ic monitor-content
 window option is enabled.
+.It Xo Ic visual-silence
+.Op Ic on | off
+.Xc
+If
+.Ic monitor-silence
+is enabled, prints a message after the interval has expired on a given window.
 .El
 .It Xo Ic set-window-option
 .Op Fl agu
@@ -2175,6 +2181,16 @@ pattern
 .Ar match-string
 appears in the window, it is highlighted in the status line.
 .Pp
+.It Xo Ic monitor-silence
+.Op Ic interval
+.Xc
+Monitor for silence (no activity) in the window within
+.Ic interval
+seconds.
+Windows that have been silent for the interval are highlighted in the
+status line.
+An interval of zero disables the monitoring.
+.Pp
 .It Xo Ic remain-on-exit
 .Op Ic on | off
 .Xc
@@ -2386,6 +2402,7 @@ The flag is one of the following symbols appended to the window name:
 .It Li "#" Ta "Window is monitored and activity has been detected."
 .It Li "!" Ta "A bell has occurred in the window."
 .It Li "+" Ta "Window is monitored for content and it has appeared."
+.It Li "~" Ta "The window has been silent for the monitor-silence interval."
 .El
 .Pp
 The # symbol relates to the

tmux.c

@@ -379,6 +379,7 @@ main(int argc, char **argv)
 	options_set_number(so, "visual-activity", 0);
 	options_set_number(so, "visual-bell", 0);
 	options_set_number(so, "visual-content", 0);
+	options_set_number(so, "visual-silence", 0);
 
 	keylist = xmalloc(sizeof *keylist);
 	ARRAY_INIT(keylist);
@@ -402,6 +403,7 @@ main(int argc, char **argv)
 	options_set_number(wo, "mode-mouse", 0);
 	options_set_number(wo, "monitor-activity", 0);
 	options_set_string(wo, "monitor-content", "%s", "");
+	options_set_number(wo, "monitor-silence", 0);
 	options_set_number(wo, "window-status-attr", 0);
 	options_set_number(wo, "window-status-bg", 8);
 	options_set_number(wo, "window-status-current-attr", 0);

tmux.h

@@ -830,6 +830,7 @@ TAILQ_HEAD(window_panes, window_pane);
 struct window {
 	char		*name;
 	struct event	 name_timer;
+	struct timeval   silence_timer;
 
 	struct window_pane *active;
 	struct window_pane *last;
@@ -845,6 +846,7 @@ struct window {
 #define WINDOW_BELL 0x1
 #define WINDOW_ACTIVITY 0x2
 #define WINDOW_REDRAW 0x4
+#define WINDOW_SILENCE 0x8
 
 	struct options	 options;
 
@@ -865,7 +867,9 @@ struct winlink {
 #define WINLINK_BELL 0x1
 #define WINLINK_ACTIVITY 0x2
 #define WINLINK_CONTENT 0x4
-#define WINLINK_ALERTFLAGS (WINLINK_BELL|WINLINK_ACTIVITY|WINLINK_CONTENT)
+#define WINLINK_SILENCE 0x8
+#define WINLINK_ALERTFLAGS \
+    (WINLINK_BELL|WINLINK_ACTIVITY|WINLINK_CONTENT|WINLINK_SILENCE)
 
 	RB_ENTRY(winlink) entry;
 	TAILQ_ENTRY(winlink) sentry;

window.c

@@ -639,6 +639,14 @@ window_pane_read_callback(unused struct bufferevent *bufev, void *data)
 	input_parse(wp);
 
 	wp->pipe_off = EVBUFFER_LENGTH(wp->event->input);
+
+	/*
+	 * If we get here, we're not outputting anymore, so set the silence
+	 * flag on the window.
+	 */
+	wp->window->flags |= WINDOW_SILENCE;
+	if (gettimeofday(&wp->window->silence_timer, NULL) != 0)
+		fatal("gettimeofday failed.");
 }
 
 /* ARGSUSED */