From 4fb8e4cf40062889ec7af4368fbedfc8a44008af Mon Sep 17 00:00:00 2001
From: nicm <nicm@openbsd.org>
Date: Tue, 27 Oct 2015 09:28:31 +0000
Subject: [PATCH] Count brackets in #{?...} so that nested conditional formats
 work, from Daniel De Graaf.

---
 usr.bin/tmux/format.c | 34 ++++++++++++++++++++--------------
 usr.bin/tmux/screen.c |  4 +---
 2 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/usr.bin/tmux/format.c b/usr.bin/tmux/format.c
index f449651804d..98398a7b07c 100644
--- a/usr.bin/tmux/format.c
+++ b/usr.bin/tmux/format.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: format.c,v 1.88 2015/10/27 09:18:06 nicm Exp $ */
+/* $OpenBSD: format.c,v 1.89 2015/10/27 09:28:31 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -670,7 +670,7 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 	char		*copy, *copy0, *endptr, *ptr, *saved, *trimmed, *value;
 	size_t		 valuelen;
 	u_long		 limit = 0;
-	int		 modifiers = 0;
+	int		 modifiers = 0, brackets;
 
 	/* Make a copy of the key. */
 	copy0 = copy = xmalloc(keylen + 1);
@@ -718,20 +718,26 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 			goto fail;
 		*ptr = '\0';
 
-		value = saved = format_find(ft, copy + 1, modifiers);
-		if (value != NULL && *value != '\0' &&
-		    (value[0] != '0' || value[1] != '\0')) {
-			value = ptr + 1;
-			ptr = strchr(value, ',');
-			if (ptr == NULL)
-				goto fail;
+		value = ptr + 1;
+		saved = format_find(ft, copy + 1, modifiers);
+
+		brackets = 0;
+		for (ptr = ptr + 1; *ptr != '\0'; ptr++) {
+			if (*ptr == '{')
+				brackets++;
+			if (*ptr == '}')
+				brackets--;
+			if (*ptr == ',' && brackets == 0)
+				break;
+		}
+		if (*ptr == '\0')
+			goto fail;
+
+		if (saved != NULL && *saved != '\0' &&
+		    (saved[0] != '0' || saved[1] != '\0')) {
 			*ptr = '\0';
-		} else {
-			ptr = strchr(ptr + 1, ',');
-			if (ptr == NULL)
-				goto fail;
+		} else
 			value = ptr + 1;
-		}
 		value = format_expand(ft, value);
 		free(saved);
 		saved = value;
diff --git a/usr.bin/tmux/screen.c b/usr.bin/tmux/screen.c
index 94e093378a2..b6fe4f5c6eb 100644
--- a/usr.bin/tmux/screen.c
+++ b/usr.bin/tmux/screen.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: screen.c,v 1.34 2015/08/28 17:11:12 nicm Exp $ */
+/* $OpenBSD: screen.c,v 1.35 2015/10/27 09:28:31 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -194,8 +194,6 @@ screen_resize_y(struct screen *s, u_int sy)
 		 * Now just increase the history size, if possible, to take
 		 * over the lines which are left. If history is off, delete
 		 * lines from the top.
-		 *
-		 * XXX Should apply history limit?
 		 */
 		available = s->cy;
 		if (gd->flags & GRID_HISTORY)
-- 
2.20.1