Add support for a single "marked pane". There is one marked pane in the

server at a time; it may be toggled or cleared with select-pane -m and
-M (the border is highlighted). A new target '~' or '{marked}' specifies
the marked pane to commands and it is the default target for the
swap-pane and join-pane -s flag (this makes them much simpler to use -
mark the source pane and then change to the target pane to run swapp or
joinp).

1 files changed, 79 insertions, 13 deletions

diff --git a/server.c b/server.c
index b53648f0..52fdb0c3 100644
--- a/server.c
+++ b/server.c
@@ -50,19 +50,85 @@ int		 server_shutdown;
 struct event	 server_ev_accept;
 struct event	 server_ev_second;
 
-int		 server_create_socket(void);
-void		 server_loop(void);
-int		 server_should_shutdown(void);
-void		 server_send_shutdown(void);
-void		 server_clean_dead(void);
-void		 server_accept_callback(int, short, void *);
-void		 server_signal_callback(int, short, void *);
-void		 server_child_signal(void);
-void		 server_child_exited(pid_t, int);
-void		 server_child_stopped(pid_t, int);
-void		 server_second_callback(int, short, void *);
-void		 server_lock_server(void);
-void		 server_lock_sessions(void);
+struct session		*marked_session;
+struct winlink		*marked_winlink;
+struct window		*marked_window;
+struct window_pane	*marked_window_pane;
+struct layout_cell	*marked_layout_cell;
+
+int	server_create_socket(void);
+void	server_loop(void);
+int	server_should_shutdown(void);
+void	server_send_shutdown(void);
+void	server_clean_dead(void);
+void	server_accept_callback(int, short, void *);
+void	server_signal_callback(int, short, void *);
+void	server_child_signal(void);
+void	server_child_exited(pid_t, int);
+void	server_child_stopped(pid_t, int);
+void	server_second_callback(int, short, void *);
+void	server_lock_server(void);
+void	server_lock_sessions(void);
+
+/* Set marked pane. */
+void
+server_set_marked(struct session *s, struct winlink *wl, struct window_pane *wp)
+{
+	marked_session = s;
+	marked_winlink = wl;
+	marked_window = wl->window;
+	marked_window_pane = wp;
+	marked_layout_cell = wp->layout_cell;
+}
+
+/* Clear marked pane. */
+void
+server_clear_marked(void)
+{
+	marked_session = NULL;
+	marked_winlink = NULL;
+	marked_window = NULL;
+	marked_window_pane = NULL;
+	marked_layout_cell = NULL;
+}
+
+/* Is this the marked pane? */
+int
+server_is_marked(struct session *s, struct winlink *wl, struct window_pane *wp)
+{
+	if (s == NULL || wl == NULL || wp == NULL)
+		return (0);
+	if (marked_session != s || marked_winlink != wl)
+		return (0);
+	if (marked_window_pane != wp)
+		return (0);
+	return (server_check_marked());
+}
+
+/* Check if the marked pane is still valid. */
+int
+server_check_marked(void)
+{
+	struct winlink	*wl;
+
+	if (marked_window_pane == NULL)
+		return (0);
+	if (marked_layout_cell != marked_window_pane->layout_cell)
+		return (0);
+
+	if (!session_alive(marked_session))
+		return (0);
+	RB_FOREACH(wl, winlinks, &marked_session->windows) {
+		if (wl->window == marked_window && wl == marked_winlink)
+			break;
+	}
+	if (wl == NULL)
+		return (0);
+
+	if (!window_has_pane(marked_window, marked_window_pane))
+		return (0);
+	return (window_pane_visible(marked_window_pane));
+}
 
 /* Create server socket. */
 int