From 2c46c1fbbb58def2042c59a83b549cef28f2bb59 Mon Sep 17 00:00:00 2001
From: nicm <nicm@openbsd.org>
Date: Sun, 19 Aug 2018 20:13:07 +0000
Subject: [PATCH] Add a flag to force redrawing of the status line even if the
 content hasn't changed, needed for resizing.

---
 usr.bin/tmux/screen-redraw.c | 23 +++++++++++++----------
 usr.bin/tmux/server-client.c |  8 +++++++-
 usr.bin/tmux/tmux.h          |  8 ++++++--
 3 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/usr.bin/tmux/screen-redraw.c b/usr.bin/tmux/screen-redraw.c
index 4cb21452db3..f0cf2a8cfaf 100644
--- a/usr.bin/tmux/screen-redraw.c
+++ b/usr.bin/tmux/screen-redraw.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: screen-redraw.c,v 1.53 2018/08/19 16:45:03 nicm Exp $ */
+/* $OpenBSD: screen-redraw.c,v 1.54 2018/08/19 20:13:07 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -344,8 +344,8 @@ screen_redraw_draw_pane_status(struct screen_redraw_ctx *ctx)
 }
 
 /* Update status line and change flags if unchanged. */
-static void
-screen_redraw_update(struct client *c)
+static int
+screen_redraw_update(struct client *c, int flags)
 {
 	struct window		*w = c->session->curw->window;
 	struct window_pane	*wp;
@@ -358,8 +358,8 @@ screen_redraw_update(struct client *c)
 		redraw = status_prompt_redraw(c);
 	else
 		redraw = status_redraw(c);
-	if (!redraw)
-		c->flags &= ~CLIENT_REDRAWSTATUS;
+	if (!redraw && (~flags & CLIENT_REDRAWSTATUSALWAYS))
+		flags &= ~CLIENT_REDRAWSTATUS;
 
 	if (options_get_number(wo, "pane-border-status") != CELL_STATUS_OFF) {
 		redraw = 0;
@@ -368,8 +368,9 @@ screen_redraw_update(struct client *c)
 				redraw = 1;
 		}
 		if (redraw)
-			c->flags |= CLIENT_REDRAWBORDERS;
+			flags |= CLIENT_REDRAWBORDERS;
 	}
+	return (flags);
 }
 
 /* Set up redraw context. */
@@ -398,21 +399,23 @@ void
 screen_redraw_screen(struct client *c)
 {
 	struct screen_redraw_ctx	ctx;
+	int				flags;
 
 	if (c->flags & CLIENT_SUSPENDED)
 		return;
 
-	screen_redraw_update(c);
+	flags = screen_redraw_update(c, c->flags);
 	screen_redraw_set_context(c, &ctx);
 
-	if (c->flags & (CLIENT_REDRAWWINDOW|CLIENT_REDRAWBORDERS)) {
+	if (flags & (CLIENT_REDRAWWINDOW|CLIENT_REDRAWBORDERS)) {
 		if (ctx.pane_status != CELL_STATUS_OFF)
 			screen_redraw_draw_pane_status(&ctx);
 		screen_redraw_draw_borders(&ctx);
 	}
-	if (c->flags & CLIENT_REDRAWWINDOW)
+	if (flags & CLIENT_REDRAWWINDOW)
 		screen_redraw_draw_panes(&ctx);
-	if (ctx.lines != 0 && (c->flags & CLIENT_REDRAWSTATUS))
+	if (ctx.lines != 0 &&
+	    (flags & (CLIENT_REDRAWSTATUS|CLIENT_REDRAWSTATUSALWAYS)))
 		screen_redraw_draw_status(&ctx);
 	tty_reset(&c->tty);
 }
diff --git a/usr.bin/tmux/server-client.c b/usr.bin/tmux/server-client.c
index 87062ed7ee6..804ed58761d 100644
--- a/usr.bin/tmux/server-client.c
+++ b/usr.bin/tmux/server-client.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: server-client.c,v 1.256 2018/08/19 16:45:03 nicm Exp $ */
+/* $OpenBSD: server-client.c,v 1.257 2018/08/19 20:13:07 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1319,6 +1319,12 @@ server_client_check_redraw(struct client *c)
 
 	if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
 		return;
+	if (c->flags & CLIENT_ALLREDRAWFLAGS) {
+		log_debug("%s: redraw%s%s%s", c->name,
+		    (c->flags & CLIENT_REDRAWWINDOW) ? " window" : "",
+		    (c->flags & CLIENT_REDRAWSTATUS) ? " status" : "",
+		    (c->flags & CLIENT_REDRAWBORDERS) ? " borders" : "");
+	}
 
 	/*
 	 * If there is outstanding data, defer the redraw until it has been
diff --git a/usr.bin/tmux/tmux.h b/usr.bin/tmux/tmux.h
index 58b0cb36819..c34eab2ca1c 100644
--- a/usr.bin/tmux/tmux.h
+++ b/usr.bin/tmux/tmux.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.840 2018/08/19 16:45:03 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.841 2018/08/19 20:13:07 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1350,8 +1350,12 @@ struct client {
 #define CLIENT_TRIPLECLICK 0x200000
 #define CLIENT_SIZECHANGED 0x400000
 #define CLIENT_STATUSOFF 0x800000
+#define CLIENT_REDRAWSTATUSALWAYS 0x1000000
 #define CLIENT_ALLREDRAWFLAGS \
-	(CLIENT_REDRAWWINDOW|CLIENT_REDRAWSTATUS|CLIENT_REDRAWBORDERS)
+	(CLIENT_REDRAWWINDOW| \
+	 CLIENT_REDRAWSTATUS| \
+	 CLIENT_REDRAWSTATUSALWAYS| \
+	 CLIENT_REDRAWBORDERS)
 	int		 flags;
 	struct key_table *keytable;
 
-- 
2.20.1