Add -F format to new-window and split-window to use with the -P flag,

from George Nachman.

cmd-new-window.c

@@ -30,9 +30,9 @@ int	cmd_new_window_exec(struct cmd *, struct cmd_ctx *);
 
 const struct cmd_entry cmd_new_window_entry = {
 	"new-window", "neww",
-	"ac:dkn:Pt:", 0, 1,
-	"[-adk] [-c start-directory] [-n window-name] [-t target-window] "
-	"[command]",
+	"ac:dF:kn:Pt:", 0, 1,
+	"[-adkP] [-c start-directory] [-F format] [-n window-name] "
+	"[-t target-window] [command]",
 	0,
 	NULL,
 	NULL,
@@ -45,9 +45,13 @@ cmd_new_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	struct args		*args = self->args;
 	struct session		*s;
 	struct winlink		*wl;
+	struct client		*c;
 	const char		*cmd, *cwd;
+	const char		*template;
 	char			*cause;
 	int			 idx, last, detached;
+	struct format_tree	*ft;
+	char			*cp;
 
 	if (args_has(args, 'a')) {
 		wl = cmd_find_window(ctx, args_get(args, 't'), &s);
@@ -116,7 +120,23 @@ cmd_new_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	} else
 		server_status_session_group(s);
 
-	if (args_has(args, 'P'))
-		ctx->print(ctx, "%s:%u", s->name, wl->idx);
+	if (args_has(args, 'P')) {
+		template = "#{session_name}:#{window_index}";
+		if (args_has(args, 'F'))
+			template = args_get(args, 'F');
+
+		ft = format_create();
+		if ((c = cmd_find_client(ctx, NULL)) != NULL)
+		    format_client(ft, c);
+		format_session(ft, s);
+		format_winlink(ft, s, wl);
+
+		cp = format_expand(ft, template);
+		ctx->print(ctx, "%s", cp);
+		free(cp);
+
+		format_free(ft);
+	}
+
 	return (0);
 }

cmd-split-window.c

@@ -33,9 +33,9 @@ int	cmd_split_window_exec(struct cmd *, struct cmd_ctx *);
 
 const struct cmd_entry cmd_split_window_entry = {
 	"split-window", "splitw",
-	"c:dl:hp:Pt:v", 0, 1,
-	"[-dhvP] [-c start-directory] [-p percentage|-l size] [-t target-pane] "
-	"[command]",
+	"c:dF:l:hp:Pt:v", 0, 1,
+	"[-dhvP] [-c start-directory] [-F format] [-p percentage|-l size] "
+	"[-t target-pane] [command]",
 	0,
 	cmd_split_window_key_binding,
 	NULL,
@@ -61,10 +61,14 @@ cmd_split_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	struct environ		 env;
 	const char		*cmd, *cwd, *shell;
 	char			*cause, *new_cause;
-	u_int			 hlimit, paneidx;
+	u_int			 hlimit;
 	int			 size, percentage;
 	enum layout_type	 type;
 	struct layout_cell	*lc;
+	const char		*template;
+	struct client		*c;
+	struct format_tree	*ft;
+	char			*cp;
 
 	if ((wl = cmd_find_pane(ctx, args_get(args, 't'), &s, &wp)) == NULL)
 		return (-1);
@@ -135,9 +139,22 @@ cmd_split_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	environ_free(&env);
 
 	if (args_has(args, 'P')) {
-		if (window_pane_index(new_wp, &paneidx) != 0)
-			fatalx("index not found");
-		ctx->print(ctx, "%s:%u.%u", s->name, wl->idx, paneidx);
+		template = "#{session_name}:#{window_index}.#{pane_index}";
+		if (args_has(args, 'F'))
+			template = args_get(args, 'F');
+
+		ft = format_create();
+		if ((c = cmd_find_client(ctx, NULL)) != NULL)
+		    format_client(ft, c);
+		format_session(ft, s);
+		format_winlink(ft, s, wl);
+		format_window_pane(ft, new_wp);
+
+		cp = format_expand(ft, template);
+		ctx->print(ctx, "%s", cp);
+		free(cp);
+
+		format_free(ft);
 	}
 	return (0);
 

tmux.1

@@ -1249,6 +1249,7 @@ is moved to
 .Op Fl c Ar start-directory
 .Op Fl n Ar window-name
 .Op Fl t Ar target-window
+.Op Fl F Ar format
 .Op Ar shell-command
 .Xc
 .D1 (alias: Ic neww )
@@ -1306,7 +1307,11 @@ start-up files.
 .Pp
 The
 .Fl P
-option prints the location of the new window after it has been created.
+option prints information about the new window after it has been created.
+By default, it uses the format
+.Ql #{session_name}:#{window_index}
+but a different format may be specified with
+.Fl F .
 .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.
@@ -1491,6 +1496,7 @@ commands.
 .Fl p Ar percentage Oc
 .Op Fl t Ar target-pane
 .Op Ar shell-command
+.Op Fl F Ar format
 .Xc
 .D1 (alias: Ic splitw )
 Create a new pane by splitting