Give clock mode its own timer.

server.c

@@ -504,8 +504,6 @@ server_child_stopped(pid_t pid, int status)
 void
 server_second_callback(unused int fd, unused short events, unused void *arg)
 {
-	struct window		*w;
-	struct window_pane	*wp;
 	struct timeval		 tv;
 
 	if (options_get_number(&global_s_options, "lock-server"))
@@ -513,13 +511,6 @@ server_second_callback(unused int fd, unused short events, unused void *arg)
 	else
 		server_lock_sessions();
 
-	RB_FOREACH(w, windows, &windows) {
-		TAILQ_FOREACH(wp, &w->panes, entry) {
-			if (wp->mode != NULL && wp->mode->timer != NULL)
-				wp->mode->timer(wp);
-		}
-	}
-
 	evtimer_del(&server_ev_second);
 	memset(&tv, 0, sizeof tv);
 	tv.tv_sec = 1;

tmux.h

@@ -777,7 +777,6 @@ struct window_mode {
 	void	(*resize)(struct window_pane *, u_int, u_int);
 	void	(*key)(struct window_pane *, struct client *, struct session *,
 		    int, struct mouse_event *);
-	void	(*timer)(struct window_pane *);
 };
 
 /* Structures for choose mode. */

window-choose.c

@@ -57,7 +57,6 @@ const struct window_mode window_choose_mode = {
 	window_choose_free,
 	window_choose_resize,
 	window_choose_key,
-	NULL,
 };
 
 struct window_choose_mode_item {

window-clock.c

@@ -29,8 +29,8 @@ void	window_clock_free(struct window_pane *);
 void	window_clock_resize(struct window_pane *, u_int, u_int);
 void	window_clock_key(struct window_pane *, struct client *,
 	    struct session *, int, struct mouse_event *);
-void	window_clock_timer(struct window_pane *);
 
+void	window_clock_timer_callback(int, short, void *);
 void	window_clock_draw_screen(struct window_pane *);
 
 const struct window_mode window_clock_mode = {
@@ -38,12 +38,12 @@ const struct window_mode window_clock_mode = {
 	window_clock_free,
 	window_clock_resize,
 	window_clock_key,
-	window_clock_timer,
 };
 
 struct window_clock_mode_data {
 	struct screen	        screen;
 	time_t			tim;
+	struct event		timer;
 };
 
 const char window_clock_table[14][5][5] = {
@@ -119,15 +119,42 @@ const char window_clock_table[14][5][5] = {
 	  { 1,0,0,0,1 } },
 };
 
+void
+window_clock_timer_callback(unused int fd, unused short events, void *arg)
+{
+	struct window_pane		*wp = arg;
+	struct window_clock_mode_data	*data = wp->modedata;
+	struct tm			 now, then;
+	time_t				 t;
+	struct timeval			 tv = { .tv_sec = 1 };
+
+	evtimer_del(&data->timer);
+	evtimer_add(&data->timer, &tv);
+
+	t = time(NULL);
+	gmtime_r(&t, &now);
+	gmtime_r(&data->tim, &then);
+	if (now.tm_min == then.tm_min)
+		return;
+	data->tim = t;
+
+	window_clock_draw_screen(wp);
+	server_redraw_window(wp->window);
+}
+
 struct screen *
 window_clock_init(struct window_pane *wp)
 {
 	struct window_clock_mode_data	*data;
 	struct screen			*s;
+	struct timeval			 tv = { .tv_sec = 1 };
 
 	wp->modedata = data = xmalloc(sizeof *data);
 	data->tim = time(NULL);
 
+	evtimer_set(&data->timer, window_clock_timer_callback, wp);
+	evtimer_add(&data->timer, &tv);
+
 	s = &data->screen;
 	screen_init(s, screen_size_x(&wp->base), screen_size_y(&wp->base), 0);
 	s->mode &= ~MODE_CURSOR;
@@ -142,6 +169,7 @@ window_clock_free(struct window_pane *wp)
 {
 	struct window_clock_mode_data	*data = wp->modedata;
 
+	evtimer_del(&data->timer);
 	screen_free(&data->screen);
 	free(data);
 }
@@ -163,24 +191,6 @@ window_clock_key(struct window_pane *wp, unused struct client *c,
 	window_pane_reset_mode(wp);
 }
 
-void
-window_clock_timer(struct window_pane *wp)
-{
-	struct window_clock_mode_data	*data = wp->modedata;
-	struct tm			 now, then;
-	time_t				 t;
-
-	t = time(NULL);
-	gmtime_r(&t, &now);
-	gmtime_r(&data->tim, &then);
-	if (now.tm_min == then.tm_min)
-		return;
-	data->tim = t;
-
-	window_clock_draw_screen(wp);
-	server_redraw_window(wp->window);
-}
-
 void
 window_clock_draw_screen(struct window_pane *wp)
 {

window-copy.c

@@ -91,7 +91,6 @@ const struct window_mode window_copy_mode = {
 	window_copy_free,
 	window_copy_resize,
 	window_copy_key,
-	NULL,
 };
 
 enum window_copy_input_type {