From a877a5d8c96f317cb8c496f0c9afa0304be926a6 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Fri, 17 Apr 2020 21:33:18 +0000
Subject: Do not move the cursor to the existing y position if it is invalid,
 go home instead.

---
 tty.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'tty.c')

diff --git a/tty.c b/tty.c
index 4090a115..9c03c08a 100644
--- a/tty.c
+++ b/tty.c
@@ -1739,7 +1739,10 @@ tty_cmd_scrollup(struct tty *tty, const struct tty_ctx *ctx)
 		for (i = 0; i < ctx->num; i++)
 			tty_putc(tty, '\n');
 	} else {
-		tty_cursor(tty, 0, tty->cy);
+		if (tty->cy == UINT_MAX)
+			tty_cursor(tty, 0, 0);
+		else
+			tty_cursor(tty, 0, tty->cy);
 		tty_putcode1(tty, TTYC_INDN, ctx->num);
 	}
 }
@@ -2063,8 +2066,12 @@ tty_region(struct tty *tty, u_int rupper, u_int rlower)
 	 * flag so further output causes a line feed). As a workaround, do an
 	 * explicit move to 0 first.
 	 */
-	if (tty->cx >= tty->sx)
-		tty_cursor(tty, 0, tty->cy);
+	if (tty->cx >= tty->sx) {
+		if (tty->cy == UINT_MAX)
+			tty_cursor(tty, 0, 0);
+		else
+			tty_cursor(tty, 0, tty->cy);
+	}
 
 	tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
 	tty->cx = tty->cy = UINT_MAX;
-- 
cgit 


From a7a9460d2790161f7bb60c4047acf32d3aa93ed9 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Fri, 17 Apr 2020 22:16:28 +0000
Subject: Set mode properly before and after redrawing, and don't bother
 calculating cursor position if it won't be used.

---
 tty.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'tty.c')

diff --git a/tty.c b/tty.c
index 9c03c08a..82436959 100644
--- a/tty.c
+++ b/tty.c
@@ -2151,6 +2151,9 @@ tty_cursor(struct tty *tty, u_int cx, u_int cy)
 	u_int		 thisx, thisy;
 	int		 change;
 
+	if (tty->flags & TTY_BLOCK)
+		return;
+
 	if (cx > tty->sx - 1)
 		cx = tty->sx - 1;
 
-- 
cgit