Store time lines are scrolled into history and display in copy mode.

format.c

@@ -3387,12 +3387,12 @@ format_quote_style(const char *s)
 }
 
 /* Make a prettier time. */
-static char *
-format_pretty_time(time_t t)
+char *
+format_pretty_time(time_t t, int seconds)
 {
 	struct tm       now_tm, tm;
 	time_t		now, age;
-	char		s[6];
+	char		s[9];
 
 	time(&now);
 	if (now < t)
@@ -3404,7 +3404,10 @@ format_pretty_time(time_t t)
 
 	/* Last 24 hours. */
 	if (age < 24 * 3600) {
-		strftime(s, sizeof s, "%H:%M", &tm);
+		if (seconds)
+			strftime(s, sizeof s, "%H:%M:%S", &tm);
+		else
+			strftime(s, sizeof s, "%H:%M", &tm);
 		return (xstrdup(s));
 	}
 
@@ -3509,7 +3512,7 @@ found:
 		if (t == 0)
 			return (NULL);
 		if (modifiers & FORMAT_PRETTY)
-			found = format_pretty_time(t);
+			found = format_pretty_time(t, 0);
 		else {
 			if (time_format != NULL) {
 				localtime_r(&t, &tm);

grid.c

@@ -399,6 +399,7 @@ grid_scroll_history(struct grid *gd, u_int bg)
 
 	gd->hscrolled++;
 	grid_compact_line(&gd->linedata[gd->hsize]);
+	gd->linedata[gd->hsize].time = current_time;
 	gd->hsize++;
 }
 
@@ -438,6 +439,7 @@ grid_scroll_history_region(struct grid *gd, u_int upper, u_int lower, u_int bg)
 
 	/* Move the line into the history. */
 	memcpy(gl_history, gl_upper, sizeof *gl_history);
+	gl_history->time = current_time;
 
 	/* Then move the region up and clear the bottom line. */
 	memmove(gl_upper, gl_upper + 1, (lower - upper) * sizeof *gl_upper);

server.c

@@ -55,6 +55,8 @@ struct cmd_find_state	 marked_pane;
 static u_int		 message_next;
 struct message_list	 message_log;
 
+time_t			 current_time;
+
 static int	server_loop(void);
 static void	server_send_exit(void);
 static void	server_accept(int, short, void *);
@@ -257,6 +259,8 @@ server_loop(void)
 	struct client	*c;
 	u_int		 items;
 
+	current_time = time (NULL);
+
 	do {
 		items = cmdq_next(NULL);
 		TAILQ_FOREACH(c, &clients, entry) {

tmux.h

@@ -725,6 +725,7 @@ struct grid_line {
 	u_int			 extdsize;
 
 	int			 flags;
+	time_t			 time;
 };
 
 /* Entire grid of cells. */
@@ -2095,6 +2096,7 @@ void		 format_add_cb(struct format_tree *, const char *, format_cb);
 void		 format_log_debug(struct format_tree *, const char *);
 void		 format_each(struct format_tree *, void (*)(const char *,
 		     const char *, void *), void *);
+char		*format_pretty_time(time_t, int);
 char		*format_expand_time(struct format_tree *, const char *);
 char		*format_expand(struct format_tree *, const char *);
 char		*format_single(struct cmdq_item *, const char *,
@@ -2587,6 +2589,7 @@ extern struct tmuxproc *server_proc;
 extern struct clients clients;
 extern struct cmd_find_state marked_pane;
 extern struct message_list message_log;
+extern time_t current_time;
 void	 server_set_marked(struct session *, struct winlink *,
 	     struct window_pane *);
 void	 server_clear_marked(void);

window-copy.c

@@ -4092,8 +4092,9 @@ window_copy_write_line(struct window_mode_entry *wme,
 	struct window_copy_mode_data	*data = wme->data;
 	struct screen			*s = &data->screen;
 	struct options			*oo = wp->window->options;
+	struct grid_line		*gl;
 	struct grid_cell		 gc, mgc, cgc, mkgc;
-	char				 hdr[512];
+	char				 hdr[512], tmp[256], *t;
 	size_t				 size = 0;
 	u_int				 hsize = screen_hsize(data->backing);
 
@@ -4107,23 +4108,29 @@ window_copy_write_line(struct window_mode_entry *wme,
 	mkgc.flags |= GRID_FLAG_NOPALETTE;
 
 	if (py == 0 && s->rupper < s->rlower && !data->hide_position) {
+		gl = grid_get_line(data->backing->grid, hsize - data->oy);
+		if (gl->time == 0)
+			xsnprintf(tmp, sizeof tmp, "[%u/%u]", data->oy, hsize);
+		else {
+			t = format_pretty_time(gl->time, 1);
+			xsnprintf(tmp, sizeof tmp, "%s [%u/%u]", t, data->oy,
+			    hsize);
+			free(t);
+		}
+
 		if (data->searchmark == NULL) {
 			if (data->timeout) {
 				size = xsnprintf(hdr, sizeof hdr,
-				    "(timed out) [%u/%u]", data->oy, hsize);
-			} else {
-				size = xsnprintf(hdr, sizeof hdr,
-				    "[%u/%u]", data->oy, hsize);
-			}
+				    "(timed out) %s", tmp);
+			} else
+				size = xsnprintf(hdr, sizeof hdr, "%s", tmp);
 		} else {
-			if (data->searchcount == -1) {
+			if (data->searchcount == -1)
+				size = xsnprintf(hdr, sizeof hdr, "%s", tmp);
+			else {
 				size = xsnprintf(hdr, sizeof hdr,
-				    "[%u/%u]", data->oy, hsize);
-			} else {
-				size = xsnprintf(hdr, sizeof hdr,
-				    "(%d%s results) [%u/%u]", data->searchcount,
-				    data->searchmore ? "+" : "", data->oy,
-				    hsize);
+				    "(%d%s results) %s", data->searchcount,
+				    data->searchmore ? "+" : "", tmp);
 			}
 		}
 		if (size > screen_size_x(s))