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Can use INDN to clear regions with default background colour if margins 

are supported.
pull/581/merge
nicm 2017-05-12 11:13:43 +00:00
parent 886d50dcab
commit 7f626c8959
1 changed files with 15 additions and 2 deletions
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17
tty.c
View File

@ -808,6 +808,7 @@ tty_clear_area(struct tty *tty, const struct window_pane *wp, u_int py,
/* If genuine BCE is available, can try escape sequences. */
if (!tty_fake_bce(tty, wp, bg)) {
/* Use ED if clearing off the bottom of the terminal. */
if (px == 0 &&
px + nx >= tty->sx &&
py + ny >= tty->sy &&
@ -818,8 +819,9 @@ tty_clear_area(struct tty *tty, const struct window_pane *wp, u_int py,
}
/*
* If we're setting a background colour (so it is not default),
* we can use DECFRA.
* On VT420 compatible terminals we can use DECFRA if the
* background colour isn't default (because it doesn't work
* after SGR 0).
*/
if (tty->term_type == TTY_VT420 && bg != 8) {
xsnprintf(tmp, sizeof tmp, "\033[32;%u;%u;%u;%u$x",
@ -827,6 +829,17 @@ tty_clear_area(struct tty *tty, const struct window_pane *wp, u_int py,
tty_puts(tty, tmp);
return;
}
/*
* If margins are supported, can just scroll the area off to
* clear it.
*/
if (tty_use_margin(tty) && tty_term_has(tty->term, TTYC_INDN)) {
tty_region(tty, py, py + ny - 1);
tty_margin(tty, px, px + nx - 1);
tty_putcode1(tty, TTYC_INDN, ny);
return;
}
}
/* Couldn't use an escape sequence, loop over the lines. */