From d254293a6d406db4b1d1d4cac36cd4225fa0d8a7 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Wed, 4 Jul 2018 12:25:26 +0000
Subject: [PATCH] Add pane focus hooks.

---
 server-client.c | 18 ++++++++++--------
 tmux.1          |  8 ++++++++
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/server-client.c b/server-client.c
index 6a94bb56..cec305f0 100644
--- a/server-client.c
+++ b/server-client.c
@@ -1148,10 +1148,6 @@ server_client_check_focus(struct window_pane *wp)
 	push = wp->flags & PANE_FOCUSPUSH;
 	wp->flags &= ~PANE_FOCUSPUSH;
 
-	/* If we don't care about focus, forget it. */
-	if (!(wp->base.mode & MODE_FOCUSON))
-		return;
-
 	/* If we're not the active pane in our window, we're not focused. */
 	if (wp->window->active != wp)
 		goto not_focused;
@@ -1175,14 +1171,20 @@ server_client_check_focus(struct window_pane *wp)
 	}
 
 not_focused:
-	if (push || (wp->flags & PANE_FOCUSED))
-		bufferevent_write(wp->event, "\033[O", 3);
+	if (push || (wp->flags & PANE_FOCUSED)) {
+		if (wp->base.mode & MODE_FOCUSON)
+			bufferevent_write(wp->event, "\033[O", 3);
+		notify_pane("pane-focus-out", wp);
+	}
 	wp->flags &= ~PANE_FOCUSED;
 	return;
 
 focused:
-	if (push || !(wp->flags & PANE_FOCUSED))
-		bufferevent_write(wp->event, "\033[I", 3);
+	if (push || !(wp->flags & PANE_FOCUSED)) {
+		if (wp->base.mode & MODE_FOCUSON)
+			bufferevent_write(wp->event, "\033[I", 3);
+		notify_pane("pane-focus-in", wp);
+	}
 	wp->flags |= PANE_FOCUSED;
 }
 
diff --git a/tmux.1 b/tmux.1
index 329279fd..303a4a30 100644
--- a/tmux.1
+++ b/tmux.1
@@ -3423,6 +3423,14 @@ Run when the program running in a pane exits, but
 is on so the pane has not closed.
 .It pane-exited
 Run when the program running in a pane exits.
+.It pane-focus-in
+Run when the focus enters a pane, if the
+.Ic focus-events
+option is on.
+.It pane-focus-out
+Run when the focus exits a pane, if the
+.Ic focus-events
+option is on.
 .It pane-set-clipboard
 Run when the terminal clipboard is set using the
 .Xr xterm 1