Add "grouped sessions" which have independent name, options, current window and

so on but where the linked windows are synchronized (ie creating, killing
windows and so on are mirrored between the sessions). A grouped session may be
created by passing -t to new-session.

Had this around for a while, tested by a couple of people.

1 files changed, 60 insertions, 13 deletions

diff --git a/server-fn.c b/server-fn.c
index 4e3e12ec..beaae07a 100644
--- a/server-fn.c
+++ b/server-fn.c
@@ -105,6 +105,19 @@ server_redraw_session(struct session *s)
 }
 
 void
+server_redraw_session_group(struct session *s)
+{
+	struct session_group	*sg;
+
+	if ((sg = session_group_find(s)) == NULL)
+		server_redraw_session(s);
+	else {
+		TAILQ_FOREACH(s, &sg->sessions, gentry)
+			server_redraw_session(s);
+	}
+}
+
+void
 server_status_session(struct session *s)
 {
 	struct client	*c;
@@ -120,6 +133,19 @@ server_status_session(struct session *s)
 }
 
 void
+server_status_session_group(struct session *s)
+{
+	struct session_group	*sg;
+
+	if ((sg = session_group_find(s)) == NULL)
+		server_status_session(s);
+	else {
+		TAILQ_FOREACH(s, &sg->sessions, gentry)
+			server_status_session(s);
+	}
+}
+
+void
 server_redraw_window(struct window *w)
 {
 	struct client	*c;
@@ -220,18 +246,27 @@ server_kill_window(struct window *w)
 			continue;
 		
 		if (session_detach(s, wl))
-			server_destroy_session(s);
-		else
+			server_destroy_session_group(s);
+		else {
 			server_redraw_session(s);
+			server_status_session_group(s);
+		}
 	}
 }
 
 int
-server_link_window(
-    struct winlink *srcwl, struct session *dst, int dstidx,
-    int killflag, int selectflag, char **cause)
+server_link_window(struct session *src, struct winlink *srcwl,
+    struct session *dst, int dstidx, int killflag, int selectflag, char **cause)
 {
-	struct winlink	*dstwl;
+	struct winlink		*dstwl;
+	struct session_group	*srcsg, *dstsg;
+
+	srcsg = session_group_find(src);
+	dstsg = session_group_find(dst);
+	if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) {
+		xasprintf(cause, "sessions are grouped");
+		return (-1);
+	}
 
 	dstwl = NULL;
 	if (dstidx != -1)
@@ -260,12 +295,9 @@ server_link_window(
 	if (dstwl == NULL)
 		return (-1);
 
-	if (!selectflag)
-		server_status_session(dst);
-	else {
+	if (selectflag)
 		session_select(dst, dstwl->idx);
-		server_redraw_session(dst);
-	}
+	server_redraw_session_group(dst);
 
 	return (0);
 }
@@ -274,9 +306,24 @@ void
 server_unlink_window(struct session *s, struct winlink *wl)
 {
 	if (session_detach(s, wl))
-		server_destroy_session(s);
+		server_destroy_session_group(s);
 	else
-		server_redraw_session(s);
+		server_redraw_session_group(s);
+}
+
+void
+server_destroy_session_group(struct session *s)
+{
+	struct session_group	*sg;
+
+	if ((sg = session_group_find(s)) == NULL)
+		server_destroy_session(s);
+	else {
+		TAILQ_FOREACH(s, &sg->sessions, gentry)
+			server_destroy_session(s);
+		TAILQ_REMOVE(&session_groups, sg, entry);
+		xfree(sg);
+	}
 }
 
 void