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If the vertical cursor movement crosses the scroll region, CUU and CUD

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shouldn't be used even if VPA isn't present - in that case CUP should be used.
This commit is contained in:
Nicholas Marriott 2009-10-12 16:37:43 +00:00
parent 56157444de
commit eb9826f65d
1 changed files with 7 additions and 6 deletions
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9
tty.c
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@ -1027,15 +1027,16 @@ 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;