Add a format window_linked which is 1 if a window has been linked

multiple times, also remove the default space in window_flags and use a
conditional to add it in window-status-format (this means additional
flags can be added in the option without extra spaces). From Thomas Adam
with tweaks by me.

7 files changed, 33 insertions, 25 deletions

diff --git a/usr.bin/tmux/cmd-kill-window.c b/usr.bin/tmux/cmd-kill-window.c
index c5f08fda15e..499929c0744 100644
--- a/usr.bin/tmux/cmd-kill-window.c
+++ b/usr.bin/tmux/cmd-kill-window.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-kill-window.c,v 1.16 2014/10/22 23:11:41 nicm Exp $ */
+/* $OpenBSD: cmd-kill-window.c,v 1.17 2015/05/06 08:35:39 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -45,24 +45,17 @@ const struct cmd_entry cmd_unlink_window_entry = {
 enum cmd_retval
 cmd_kill_window_exec(struct cmd *self, struct cmd_q *cmdq)
 {
-	struct args		*args = self->args;
-	struct winlink		*wl, *wl2, *wl3;
-	struct window		*w;
-	struct session		*s;
-	struct session_group	*sg;
-	u_int			 references;
+	struct args	*args = self->args;
+	struct winlink	*wl, *wl2, *wl3;
+	struct window	*w;
+	struct session	*s;
 
 	if ((wl = cmd_find_window(cmdq, args_get(args, 't'), &s)) == NULL)
 		return (CMD_RETURN_ERROR);
 	w = wl->window;
 
 	if (self->entry == &cmd_unlink_window_entry) {
-		sg = session_group_find(s);
-		if (sg != NULL)
-			references = session_group_count(sg);
-		else
-			references = 1;
-		if (!args_has(self->args, 'k') && w->references == references) {
+		if (!args_has(self->args, 'k') && !session_is_linked(s, w)) {
 			cmdq_error(cmdq, "window only linked to one session");
 			return (CMD_RETURN_ERROR);
 		}
diff --git a/usr.bin/tmux/format.c b/usr.bin/tmux/format.c
index 8b0538e87d4..d3f350d902d 100644
--- a/usr.bin/tmux/format.c
+++ b/usr.bin/tmux/format.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: format.c,v 1.63 2015/04/21 22:38:49 nicm Exp $ */
+/* $OpenBSD: format.c,v 1.64 2015/05/06 08:35:39 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -621,6 +621,7 @@ format_defaults_winlink(struct format_tree *ft, struct session *s,
 	    !!(wl->flags & WINLINK_SILENCE));
 	format_add(ft, "window_last_flag", "%d",
 	    !!(wl == TAILQ_FIRST(&s->lastw)));
+	format_add(ft, "window_linked", "%d", session_is_linked(s, wl->window));
 
 	free(flags);
 }
diff --git a/usr.bin/tmux/options-table.c b/usr.bin/tmux/options-table.c
index 99fbbcad0e9..797db845401 100644
--- a/usr.bin/tmux/options-table.c
+++ b/usr.bin/tmux/options-table.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: options-table.c,v 1.56 2015/04/29 15:59:08 nicm Exp $ */
+/* $OpenBSD: options-table.c,v 1.57 2015/05/06 08:35:39 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -737,7 +737,7 @@ const struct options_table_entry window_options_table[] = {
 
 	{ .name = "window-status-current-format",
 	  .type = OPTIONS_TABLE_STRING,
-	  .default_str = "#I:#W#F"
+	  .default_str = "#I:#W#{?window_flags,#{window_flags}, }"
 	},
 
 	{ .name = "window-status-current-style",
@@ -753,7 +753,7 @@ const struct options_table_entry window_options_table[] = {
 
 	{ .name = "window-status-format",
 	  .type = OPTIONS_TABLE_STRING,
-	  .default_str = "#I:#W#F"
+	  .default_str = "#I:#W#{?window_flags,#{window_flags}, }"
 	},
 
 	{ .name = "window-status-last-attr",
diff --git a/usr.bin/tmux/session.c b/usr.bin/tmux/session.c
index f809f06bbf8..39d2d1a1fe7 100644
--- a/usr.bin/tmux/session.c
+++ b/usr.bin/tmux/session.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: session.c,v 1.48 2015/04/25 18:09:28 nicm Exp $ */
+/* $OpenBSD: session.c,v 1.49 2015/05/06 08:35:39 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -337,6 +337,20 @@ session_has(struct session *s, struct window *w)
 	return (0);
 }
 
+/*
+ * Return 1 if a window is linked outside this session (not including session
+ * groups). The window must be in this session!
+ */
+int
+session_is_linked(struct session *s, struct window *w)
+{
+	struct session_group	*sg;
+
+	if ((sg = session_group_find(s)) != NULL)
+		return (w->references != session_group_count(sg));
+	return (w->references != 1);
+}
+
 struct winlink *
 session_next_alert(struct winlink *wl)
 {
diff --git a/usr.bin/tmux/tmux.1 b/usr.bin/tmux/tmux.1
index dc3b4985d98..7139f384ad5 100644
--- a/usr.bin/tmux/tmux.1
+++ b/usr.bin/tmux/tmux.1
@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.425 2015/04/29 15:59:08 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.426 2015/05/06 08:35:39 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
 .\"
@@ -14,7 +14,7 @@
 .\" IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 .\" OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: April 29 2015 $
+.Dd $Mdocdate: May 6 2015 $
 .Dt TMUX 1
 .Os
 .Sh NAME
@@ -3345,6 +3345,7 @@ The following variables are available, where appropriate:
 .It Li "window_index" Ta "#I" Ta "Index of window"
 .It Li "window_last_flag" Ta "" Ta "1 if window is the last used"
 .It Li "window_layout" Ta "" Ta "Window layout description"
+.It Li "window_linked" Ta "" Ta "1 if window is linked across sessions"
 .It Li "window_name" Ta "#W" Ta "Name of window"
 .It Li "window_panes" Ta "" Ta "Number of panes in window"
 .It Li "window_silence_flag" Ta "" Ta "1 if window has silence alert"
diff --git a/usr.bin/tmux/tmux.h b/usr.bin/tmux/tmux.h
index fd426568e36..6dc6a00c09d 100644
--- a/usr.bin/tmux/tmux.h
+++ b/usr.bin/tmux/tmux.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.503 2015/04/28 10:43:14 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.504 2015/05/06 08:35:39 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -2328,6 +2328,7 @@ struct winlink	*session_attach(struct session *, struct window *, int,
 		     char **);
 int		 session_detach(struct session *, struct winlink *);
 int		 session_has(struct session *, struct window *);
+int		 session_is_linked(struct session *, struct window *);
 int		 session_next(struct session *, int);
 int		 session_previous(struct session *, int);
 int		 session_select(struct session *, int);
diff --git a/usr.bin/tmux/window.c b/usr.bin/tmux/window.c
index 6a692fc5d84..81173456360 100644
--- a/usr.bin/tmux/window.c
+++ b/usr.bin/tmux/window.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: window.c,v 1.127 2015/04/28 10:43:14 nicm Exp $ */
+/* $OpenBSD: window.c,v 1.128 2015/05/06 08:35:39 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -643,7 +643,7 @@ window_destroy_panes(struct window *w)
 	}
 }
 
-/* Return list of printable window flag symbols. No flags is just a space. */
+/* Retuns the printable flags on a window, empty string if no flags set. */
 char *
 window_printable_flags(struct session *s, struct winlink *wl)
 {
@@ -663,8 +663,6 @@ window_printable_flags(struct session *s, struct winlink *wl)
 		flags[pos++] = '-';
 	if (wl->window->flags & WINDOW_ZOOMED)
 		flags[pos++] = 'Z';
-	if (pos == 0)
-		flags[pos++] = ' ';
 	flags[pos] = '\0';
 	return (xstrdup(flags));
 }