From 06ac4b628dfb581eaad29e8a33859ab9bb07f8bb Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Sun, 10 Feb 2013 18:58:05 +0000
Subject: [PATCH] Add a format client_prefix which is 1 if prefix key has been
 pressed, used for example #{?client_prefix,X,Y}. Also a few extra
 server_client_status needed.

---
 format.c        | 2 ++
 server-client.c | 7 ++++++-
 status.c        | 4 ++--
 tmux.1          | 2 ++
 4 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/format.c b/format.c
index 1143ced3..abd6808c 100644
--- a/format.c
+++ b/format.c
@@ -322,6 +322,8 @@ format_client(struct format_tree *ft, struct client *c)
 	*strchr(tim, '\n') = '\0';
 	format_add(ft, "client_activity_string", "%s", tim);
 
+	format_add(ft, "client_prefix", "%d", !!(c->flags & CLIENT_PREFIX));
+
 	if (c->tty.flags & TTY_UTF8)
 		format_add(ft, "client_utf8", "%d", 1);
 	else
diff --git a/server-client.c b/server-client.c
index 796390f7..e683a206 100644
--- a/server-client.c
+++ b/server-client.c
@@ -417,6 +417,7 @@ server_client_handle_key(struct client *c, int key)
 	if (!(c->flags & CLIENT_PREFIX)) {
 		if (isprefix) {
 			c->flags |= CLIENT_PREFIX;
+			server_status_client(c);
 			return;
 		}
 
@@ -431,6 +432,7 @@ server_client_handle_key(struct client *c, int key)
 
 	/* Prefix key already pressed. Reset prefix and lookup key. */
 	c->flags &= ~CLIENT_PREFIX;
+	server_status_client(c);
 	if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
 		/* If repeating, treat this as a key, else ignore. */
 		if (c->flags & CLIENT_REPEAT) {
@@ -586,8 +588,11 @@ server_client_repeat_timer(unused int fd, unused short events, void *data)
 {
 	struct client	*c = data;
 
-	if (c->flags & CLIENT_REPEAT)
+	if (c->flags & CLIENT_REPEAT) {
+		if (c->flags & CLIENT_PREFIX)
+			server_status_client(c);
 		c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
+	}
 }
 
 /* Check if client should be exited. */
diff --git a/status.c b/status.c
index fa1d44e6..13ea9a53 100644
--- a/status.c
+++ b/status.c
@@ -437,8 +437,7 @@ status_replace1(struct client *c, struct session *s, struct winlink *wl,
 	case 'P':
 		if (window_pane_index(wp, &idx) != 0)
 			fatalx("index not found");
-		xsnprintf(
-		    tmp, sizeof tmp, "%u", idx);
+		xsnprintf(tmp, sizeof tmp, "%u", idx);
 		ptr = tmp;
 		goto do_replace;
 	case 'S':
@@ -539,6 +538,7 @@ status_replace(struct client *c, struct session *s, struct winlink *wl,
 	*optr = '\0';
 
 	ft = format_create();
+	format_client(ft, c);
 	format_session(ft, s);
 	format_winlink(ft, s, wl);
 	format_window_pane(ft, wp);
diff --git a/tmux.1 b/tmux.1
index c360be77..235f3c8e 100644
--- a/tmux.1
+++ b/tmux.1
@@ -2370,6 +2370,7 @@ may contain any of the following special character sequences:
 .It Li "#S" Ta "Session name"
 .It Li "#T" Ta "Current pane title"
 .It Li "#W" Ta "Current window name"
+.It Li "'^" Ta "Prefix key if pressed or same length as spaces"
 .It Li "##" Ta "A literal" Ql #
 .El
 .Pp
@@ -2939,6 +2940,7 @@ The following variables are available, where appropriate:
 .It Li "client_created_string" Ta "String time client created"
 .It Li "client_cwd" Ta "Working directory of client"
 .It Li "client_height" Ta "Height of client"
+.It Li "client_prefix" Ta "1 if prefix key has been pressed"
 .It Li "client_readonly" Ta "1 if client is readonly"
 .It Li "client_termname" Ta "Terminal name of client"
 .It Li "client_tty" Ta "Pseudo terminal of client"