void
tty_check_fg(struct tty *tty, struct grid_cell *gc)
{
u_int colours;
/* Is this a 256-colour colour? */
if (gc->flags & GRID_FLAG_FG256) {
/* And not a 256 colour mode? */
if (!(tty->term->flags & TERM_88COLOURS) &&
!(tty->term_flags & TERM_88COLOURS) &&
!(tty->term->flags & TERM_256COLOURS) &&
!(tty->term_flags & TERM_256COLOURS)) {
gc->fg = colour_256to16(gc->fg);
if (gc->fg & 8) {
gc->fg &= 7;
gc->attr |= GRID_ATTR_BRIGHT;
} else
gc->attr &= ~GRID_ATTR_BRIGHT;
gc->flags &= ~GRID_FLAG_FG256;
}
return;
}
/* Is this an aixterm colour? */
colours = tty_term_number(tty->term, TTYC_COLORS);
if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) {
gc->fg -= 90;
gc->attr |= GRID_ATTR_BRIGHT;
}
}
void
tty_check_bg(struct tty *tty, struct grid_cell *gc)
{
u_int colours;
/* Is this a 256-colour colour? */
if (gc->flags & GRID_FLAG_BG256) {
/*
* And not a 256 colour mode? Translate to 16-colour
* palette. Bold background doesn't exist portably, so just
* discard the bold bit if set.
*/
if (!(tty->term->flags & TERM_88COLOURS) &&
!(tty->term_flags & TERM_88COLOURS) &&
!(tty->term->flags & TERM_256COLOURS) &&
!(tty->term_flags & TERM_256COLOURS)) {
gc->bg = colour_256to16(gc->bg);
if (gc->bg & 8)
gc->bg &= 7;
gc->attr &= ~GRID_ATTR_BRIGHT;
gc->flags &= ~GRID_FLAG_BG256;
}
return;
}
/* Is this an aixterm colour? */
colours = tty_term_number(tty->term, TTYC_COLORS);
if (gc->bg >= 100 && gc->bg <= 107 && colours < 16) {
gc->bg -= 90;
gc->attr |= GRID_ATTR_BRIGHT;
}
}
void
tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
u_char bg = gc->bg;
char s[32];
/* Is this a 256-colour colour? */
if (gc->flags & GRID_FLAG_BG256) {
/* Try as 256 colours or translating to 88. */
if (tty_try_256(tty, bg, "48") == 0)
goto save_bg;
if (tty_try_88(tty, bg, "48") == 0)
goto save_bg;
/* Else already handled by tty_check_bg. */
return;
}
/* Is this an aixterm bright colour? */
if (bg >= 100 && bg <= 107) {
/* 16 colour terminals or above only. */
if (tty_term_number(tty->term, TTYC_COLORS) >= 16) {
xsnprintf(s, sizeof s, "\033[%dm", bg);
tty_puts(tty, s);
goto save_bg;
}
bg -= 100;
/* no such thing as a bold background */
}
/* Otherwise set the background colour. */
tty_putcode1(tty, TTYC_SETAB, bg);
save_bg:
/* Save the new values in the terminal current cell. */
tc->bg = bg;
tc->flags &= ~GRID_FLAG_BG256;
tc->flags |= gc->flags & GRID_FLAG_BG256;
}
/* Should this terminal use ACS instead of UTF-8 line drawing? */
int
tty_acs_needed(struct tty *tty)
{
if (tty == NULL)
return (0);
/*
* If the U8 flag is present, it marks whether a terminal supports
* UTF-8 and ACS together.
*
* If it is present and zero, we force ACS - this gives users a way to
* turn off UTF-8 line drawing.
*
* If it is nonzero, we can fall through to the default and use UTF-8
* line drawing on UTF-8 terminals.
*/
if (tty_term_has(tty->term, TTYC_U8) &&
tty_term_number(tty->term, TTYC_U8) == 0)
return (1);
if (tty->flags & TTY_UTF8)
return (0);
return (1);
}
