Add a -P option to new-window and split-window to print the new window

or pane index in target form (useful to pass it into other commands).

cmd-new-window.c

@@ -39,11 +39,12 @@ struct cmd_new_window_data {
 	int	 flag_insert_after;
 	int	 flag_detached;
 	int	 flag_kill;
+	int      flag_print;
 };
 
 const struct cmd_entry cmd_new_window_entry = {
 	"new-window", "neww",
-	"[-adk] [-n window-name] [-t target-window] [command]",
+	"[-adkP] [-n window-name] [-t target-window] [command]",
 	0, "",
 	cmd_new_window_init,
 	cmd_new_window_parse,
@@ -65,6 +66,7 @@ cmd_new_window_init(struct cmd *self, unused int arg)
 	data->flag_insert_after = 0;
 	data->flag_detached = 0;
 	data->flag_kill = 0;
+	data->flag_print = 0;
 }
 
 int
@@ -76,7 +78,7 @@ cmd_new_window_parse(struct cmd *self, int argc, char **argv, char **cause)
 	self->entry->init(self, KEYC_NONE);
 	data = self->data;
 
-	while ((opt = getopt(argc, argv, "adkt:n:")) != -1) {
+	while ((opt = getopt(argc, argv, "adkt:n:P")) != -1) {
 		switch (opt) {
 		case 'a':
 			data->flag_insert_after = 1;
@@ -95,6 +97,9 @@ cmd_new_window_parse(struct cmd *self, int argc, char **argv, char **cause)
 			if (data->name == NULL)
 				data->name = xstrdup(optarg);
 			break;
+		case 'P':
+			data->flag_print = 1;
+			break;
 		default:
 			goto usage;
 		}
@@ -198,6 +203,8 @@ cmd_new_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	} else
 		server_status_session_group(s);
 
+	if (data->flag_print)
+		ctx->print(ctx, "%s:%u", s->name, wl->idx);
 	return (0);
 }
 
@@ -226,6 +233,8 @@ cmd_new_window_print(struct cmd *self, char *buf, size_t len)
 		return (off);
 	if (off < len && data->flag_detached)
 		off += xsnprintf(buf + off, len - off, " -d");
+	if (off < len && data->flag_print)
+		off += xsnprintf(buf + off, len - off, " -P");
 	if (off < len && data->target != NULL)
 		off += cmd_prarg(buf + off, len - off, " -t ", data->target);
 	if (off < len && data->name != NULL)

cmd-split-window.c

@@ -39,13 +39,14 @@ struct cmd_split_window_data {
 	char	*cmd;
 	int	 flag_detached;
 	int	 flag_horizontal;
+	int	 flag_print;
 	int	 percentage;
 	int	 size;
 };
 
 const struct cmd_entry cmd_split_window_entry = {
 	"split-window", "splitw",
-	"[-dhv] [-p percentage|-l size] [-t target-pane] [command]",
+	"[-dhvP] [-p percentage|-l size] [-t target-pane] [command]",
 	0, "",
 	cmd_split_window_init,
 	cmd_split_window_parse,
@@ -64,6 +65,7 @@ cmd_split_window_init(struct cmd *self, int key)
 	data->cmd = NULL;
 	data->flag_detached = 0;
 	data->flag_horizontal = 0;
+	data->flag_print = 0;
 	data->percentage = -1;
 	data->size = -1;
 
@@ -87,7 +89,7 @@ cmd_split_window_parse(struct cmd *self, int argc, char **argv, char **cause)
 	self->entry->init(self, KEYC_NONE);
 	data = self->data;
 
-	while ((opt = getopt(argc, argv, "dhl:p:t:v")) != -1) {
+	while ((opt = getopt(argc, argv, "dhl:p:Pt:v")) != -1) {
 		switch (opt) {
 		case 'd':
 			data->flag_detached = 1;
@@ -117,6 +119,9 @@ cmd_split_window_parse(struct cmd *self, int argc, char **argv, char **cause)
 				goto error;
 			}
 			break;
+		case 'P':
+			data->flag_print = 1;
+			break;
 		case 'v':
 			data->flag_horizontal = 0;
 			break;
@@ -153,7 +158,7 @@ cmd_split_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	struct environ			 env;
 	char		 		*cmd, *cwd, *cause;
 	const char			*shell;
-	u_int				 hlimit;
+	u_int				 hlimit, paneidx;
 	int				 size;
 	enum layout_type		 type;
 	struct layout_cell		*lc;
@@ -217,6 +222,11 @@ cmd_split_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		server_status_session(s);
 
 	environ_free(&env);
+
+	if (data->flag_print) {
+		paneidx = window_pane_index(wl->window, new_wp);
+		ctx->print(ctx, "%s:%u.%u", s->name, wl->idx, paneidx);
+	}
 	return (0);
 
 error:
@@ -253,6 +263,8 @@ cmd_split_window_print(struct cmd *self, char *buf, size_t len)
 		off += xsnprintf(buf + off, len - off, " -d");
 	if (off < len && data->flag_horizontal)
 		off += xsnprintf(buf + off, len - off, " -h");
+	if (off < len && data->flag_print)
+		off += xsnprintf(buf + off, len - off, " -P");
 	if (off < len && data->size > 0)
 		off += xsnprintf(buf + off, len - off, " -l %d", data->size);
 	if (off < len && data->percentage > 0) {

tmux.1

@@ -1097,7 +1097,7 @@ except the window at
 is moved to
 .Ar dst-window .
 .It Xo Ic new-window
-.Op Fl adk
+.Op Fl adkP
 .Op Fl n Ar window-name
 .Op Fl t Ar target-window
 .Op Ar shell-command
@@ -1145,6 +1145,10 @@ New windows will automatically have
 .Dq TERM=screen
 added to their environment, but care must be taken not to reset this in shell
 start-up files.
+.Pp
+The
+.Fl P
+option prints the location of the new window after it has been created.
 .It Ic next-layout Op Fl t Ar target-window
 .D1 (alias: Ic nextl )
 Move a window to the next layout and rearrange the panes to fit.
@@ -1281,7 +1285,7 @@ target pane is used.
 Select the window at
 .Ar target-window .
 .It Xo Ic split-window
-.Op Fl dhv
+.Op Fl dhvP
 .Oo Fl l
 .Ar size |
 .Fl p Ar percentage Oc