From 683ddbc466bbd6ff2a890c11edccc482bfe0dc87 Mon Sep 17 00:00:00 2001 From: Nicholas Marriott Date: Wed, 21 Oct 2009 09:36:53 +0000 Subject: [PATCH] Some terminals don't correctly clear their let's-wrap flag after changing the scroll region (which moves the cursor to 0,0). This means that if the cursor was at the edge of the screen, any further output after scroll region change incorrectly causes a line wrap. Add a workaround to move the cursor to position 0 if it is at the screen edge before changing scroll region. --- tty.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/tty.c b/tty.c index ee725edf..177648b7 100644 --- a/tty.c +++ b/tty.c @@ -955,6 +955,15 @@ tty_region(struct tty *tty, u_int rupper, u_int rlower) tty->rupper = rupper; tty->rlower = rlower; + /* + * Some terminals (such as PuTTY) do not correctly reset the cursor to + * 0,0 if it is beyond the last column (they do not reset their wrap + * 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); + tty->cx = 0; tty->cy = 0;