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Sync OpenBSD patchset 398:

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If the vertical cursor movement crosses the scroll region, CUU and CUD
shouldn't be used even if VPA isn't present - in that case CUP should be used.
This commit is contained in:
Tiago Cunha 2009-10-15 01:36:53 +00:00
parent 7af01a4afb
commit 858b8b190b
1 changed files with 8 additions and 7 deletions
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15
tty.c
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@ -1,4 +1,4 @@
/* $Id: tty.c,v 1.147 2009-10-15 01:34:28 tcunha Exp $ */ /* $Id: tty.c,v 1.148 2009-10-15 01:36:53 tcunha Exp $ */
/* /*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -1032,15 +1032,16 @@ tty_cursor(struct tty *tty, u_int cx, u_int cy)
change = thisy - cy; /* +ve up, -ve down */ change = thisy - cy; /* +ve up, -ve down */
/* /*
* Use VPA if change is larger than absolute or if this change * Try to use VPA if change is larger than absolute or if this change
* would cross the scroll region, otherwise use CUU/CUD. * would cross the scroll region, otherwise use CUU/CUD.
*/ */
if ((abs(change) > cy || if (abs(change) > cy ||
(change < 0 && cy - change > tty->rlower) || (change < 0 && cy - change > tty->rlower) ||
(change > 0 && cy - change < tty->rupper)) && (change > 0 && cy - change < tty->rupper)) {
tty_term_has(term, TTYC_VPA)) { if (tty_term_has(term, TTYC_VPA)) {
tty_putcode1(tty, TTYC_VPA, cy); tty_putcode1(tty, TTYC_VPA, cy);
goto out; goto out;
}
} else if (change > 0 && tty_term_has(term, TTYC_CUU)) { } else if (change > 0 && tty_term_has(term, TTYC_CUU)) {
tty_putcode1(tty, TTYC_CUU, change); tty_putcode1(tty, TTYC_CUU, change);
goto out; goto out;