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Sync OpenBSD patchset 426:

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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.
This commit is contained in:
Tiago Cunha 2009-10-23 17:22:39 +00:00
parent 21b23f8e54
commit 8ec8d1f32a
1 changed files with 10 additions and 1 deletions
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11
tty.c
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@ -1,4 +1,4 @@
/* $Id: tty.c,v 1.158 2009-10-23 17:16:24 tcunha Exp $ */
/* $Id: tty.c,v 1.159 2009-10-23 17:22:39 tcunha Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -960,6 +960,15 @@ 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;