Permit option values to be used in formats.

format.c

@@ -39,8 +39,26 @@ int	 format_replace(struct format_tree *, const char *, size_t, char **,
 char	*format_get_command(struct window_pane *);
 void	 format_window_pane_tabs(struct format_tree *, struct window_pane *);
 
+/* Entry in format tree. */
+struct format_entry {
+	char		       *key;
+	char		       *value;
+
+	RB_ENTRY(format_entry)	entry;
+};
+
+/* Tree of format entries. */
+struct format_tree {
+	struct window	*w;
+	struct session	*s;
+
+	RB_HEAD(format_rb_tree, format_entry) tree;
+};
+
 /* Format key-value replacement entry. */
-RB_GENERATE(format_tree, format_entry, entry, format_cmp);
+int	format_cmp(struct format_entry *, struct format_entry *);
+RB_PROTOTYPE(format_rb_tree, format_entry, entry, format_cmp);
+RB_GENERATE(format_rb_tree, format_entry, entry, format_cmp);
 
 /* Format tree comparison function. */
 int
@@ -116,8 +134,8 @@ format_create(void)
 	struct format_tree	*ft;
 	char			 host[MAXHOSTNAMELEN], *ptr;
 
-	ft = xmalloc(sizeof *ft);
+	ft = xcalloc(1, sizeof *ft);
-	RB_INIT(ft);
+	RB_INIT(&ft->tree);
 
 	if (gethostname(host, sizeof host) == 0) {
 		format_add(ft, "host", "%s", host);
@@ -133,14 +151,10 @@ format_create(void)
 void
 format_free(struct format_tree *ft)
 {
-	struct format_entry	*fe, *fe_next;
+	struct format_entry	*fe, *fe1;
 
-	fe_next = RB_MIN(format_tree, ft);
+	RB_FOREACH_SAFE(fe, format_rb_tree, &ft->tree, fe1) {
-	while (fe_next != NULL) {
+		RB_REMOVE(format_rb_tree, &ft->tree, fe);
-		fe = fe_next;
-		fe_next = RB_NEXT(format_tree, ft, fe);
-
-		RB_REMOVE(format_tree, ft, fe);
 		free(fe->value);
 		free(fe->key);
 		free(fe);
@@ -164,7 +178,7 @@ format_add(struct format_tree *ft, const char *key, const char *fmt, ...)
 	xvasprintf(&fe->value, fmt, ap);
 	va_end(ap);
 
-	fe_now = RB_INSERT(format_tree, ft, fe);
+	fe_now = RB_INSERT(format_rb_tree, &ft->tree, fe);
 	if (fe_now != NULL) {
 		free(fe_now->value);
 		fe_now->value = fe->value;
@@ -178,9 +192,32 @@ const char *
 format_find(struct format_tree *ft, const char *key)
 {
 	struct format_entry	*fe, fe_find;
+	struct options_entry	*o;
+	static char		 s[16];
+
+	o = options_find(&global_options, key);
+	if (o == NULL && ft->w != NULL)
+		o = options_find(&ft->w->options, key);
+	if (o == NULL)
+		o = options_find(&global_w_options, key);
+	if (o == NULL && ft->s != NULL)
+		o = options_find(&ft->s->options, key);
+	if (o == NULL)
+		o = options_find(&global_s_options, key);
+	if (o != NULL) {
+		switch (o->type) {
+		case OPTIONS_STRING:
+			return (o->str);
+		case OPTIONS_NUMBER:
+			snprintf(s, sizeof s, "%lld", o->num);
+			return (s);
+		case OPTIONS_STYLE:
+			return (style_tostring(&o->style));
+		}
+	}
 
 	fe_find.key = (char *) key;
-	fe = RB_FIND(format_tree, ft, &fe_find);
+	fe = RB_FIND(format_rb_tree, &ft->tree, &fe_find);
 	if (fe == NULL)
 		return (NULL);
 	return (fe->value);
@@ -205,7 +242,7 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 	copy[keylen] = '\0';
 
 	/* Is there a length limit or whatnot? */
-	if (!islower((u_char) *copy) && *copy != '?') {
+	if (!islower((u_char) *copy) && *copy != '@' && *copy != '?') {
 		while (*copy != ':' && *copy != '\0') {
 			switch (*copy) {
 			case '=':
@@ -388,6 +425,8 @@ format_session(struct format_tree *ft, struct session *s)
 	char			*tim;
 	time_t			 t;
 
+	ft->s = s;
+
 	format_add(ft, "session_name", "%s", s->name);
 	format_add(ft, "session_windows", "%u", winlink_count(&s->windows));
 	format_add(ft, "session_width", "%u", s->sx);
@@ -417,6 +456,9 @@ format_client(struct format_tree *ft, struct client *c)
 	time_t		 t;
 	struct session	*s;
 
+	if (ft->s == NULL)
+		ft->s = c->session;
+
 	format_add(ft, "client_height", "%u", c->tty.sy);
 	format_add(ft, "client_width", "%u", c->tty.sx);
 	if (c->tty.path != NULL)
@@ -462,6 +504,8 @@ format_window(struct format_tree *ft, struct window *w)
 {
 	char	*layout;
 
+	ft->w = w;
+
 	layout = layout_dump(w);
 
 	format_add(ft, "window_id", "@%u", w->id);
@@ -483,6 +527,9 @@ format_winlink(struct format_tree *ft, struct session *s, struct winlink *wl)
 	struct window	*w = wl->window;
 	char		*flags;
 
+	if (ft->w == NULL)
+		ft->w = wl->window;
+
 	flags = window_printable_flags(s, wl);
 
 	format_window(ft, w);
@@ -535,6 +582,9 @@ format_window_pane(struct format_tree *ft, struct window_pane *wp)
 	u_int			 i, idx;
 	char			*cmd;
 
+	if (ft->w == NULL)
+		ft->w = wp->window;
+
 	size = 0;
 	for (i = 0; i < gd->hsize; i++) {
 		gl = &gd->linedata[i];

tmux.1

@@ -3039,12 +3039,17 @@ and
 .Ql } ,
 for example
 .Ql #{session_name} .
-Some variables also have an shorter alias such as
+The possible variables are listed in the table below, or the name of a
-.Ql #S .
+.Nm
+option may be used for an option's value.
+Some variables have a shorter alias such as
+.Ql #S ,
+and
 .Ql ##
 is replaced by a single
 .Ql # .
-Conditionals are also accepted by prefixing with
+.Pp
+Conditionals are available by prefixing with
 .Ql \&?
 and separating two alternatives with a comma;
 if the specified variable exists and is not zero, the first alternative
@@ -3055,7 +3060,15 @@ will include the string
 .Ql attached
 if the session is attached and the string
 .Ql not attached
-if it is unattached.
+if it is unattached, or
+.Ql #{?automatic-rename,yes,no}
+will include
+.Ql yes
+if
+.Ic automatic-rename
+is enabled, or
+.Ql no
+if not.
 A limit may be placed on the length of the resultant string by prefixing it
 by an
 .Ql = ,

tmux.h

@@ -1461,15 +1461,6 @@ struct options_table_entry {
 	const char	       *style;
 };
 
-/* Tree of format entries. */
-struct format_entry {
-	char		       *key;
-	char		       *value;
-
-	RB_ENTRY(format_entry)	entry;
-};
-RB_HEAD(format_tree, format_entry);
-
 /* Common command usages. */
 #define CMD_TARGET_PANE_USAGE "[-t target-pane]"
 #define CMD_TARGET_WINDOW_USAGE "[-t target-window]"
@@ -1513,8 +1504,7 @@ void		 cfg_print_causes(struct cmd_q *);
 void		 cfg_show_causes(struct session *);
 
 /* format.c */
-int		 format_cmp(struct format_entry *, struct format_entry *);
+struct format_tree;
-RB_PROTOTYPE(format_tree, format_entry, entry, format_cmp);
 struct format_tree *format_create(void);
 void		 format_free(struct format_tree *);
 void printflike(3, 4) format_add(struct format_tree *, const char *,