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If colours are not supported by the terminal, try to emulate a coloured

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background by setting or clearing the reverse attribute.

This makes a few applications which don't use the reverse attribute themselves
a little happier, and allows the status, message and mode options to have
default attributes and fg/bg options that work as expected when set as reverse.
This commit is contained in:
Nicholas Marriott
2009-08-05 16:26:38 +00:00
parent 12ef3ceda1
commit bcddddf98d
7 changed files with 39 additions and 25 deletions
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26
tty.c
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@ -951,19 +951,33 @@ tty_attributes(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
u_char changed;
u_int fg, bg;
u_int fg, bg, attr;
/*
* If no setab, try to use the reverse attribute as a best-effort for a
* non-default background. This is a bit of a hack but it doesn't do
* any serious harm and makes a couple of applications happier.
*/
fg = gc->fg; bg = gc->bg; attr = gc->attr;
if (!tty_term_has(tty->term, TTYC_SETAB)) {
if (attr & GRID_ATTR_REVERSE) {
if (fg != 7 && fg != 8)
attr &= ~GRID_ATTR_REVERSE;
} else {
if (bg != 0 && bg != 8)
attr |= GRID_ATTR_REVERSE;
}
}
/* If any bits are being cleared, reset everything. */
if (tc->attr & ~gc->attr)
if (tc->attr & ~attr)
tty_reset(tty);
/* Filter out attribute bits already set. */
changed = gc->attr & ~tc->attr;
tc->attr = gc->attr;
changed = attr & ~tc->attr;
tc->attr = attr;
/* Set the attributes. */
fg = gc->fg;
bg = gc->bg;
if (changed & GRID_ATTR_BRIGHT)
tty_putcode(tty, TTYC_BOLD);
if (changed & GRID_ATTR_DIM)