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Add support for underscore colours with Setulc capability, mostly from

Browse Source 
Kai Moschcau.
This commit is contained in:
nicm
2019-06-27 15:17:41 +00:00
parent 3a6d90adad
commit dae2868d12
9 changed files with 184 additions and 21 deletions
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64
tty.c
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@ -49,8 +49,11 @@ static void tty_check_fg(struct tty *, struct window_pane *,
struct grid_cell *);
static void tty_check_bg(struct tty *, struct window_pane *,
struct grid_cell *);
static void tty_check_us(struct tty *, struct window_pane *,
struct grid_cell *);
static void tty_colours_fg(struct tty *, const struct grid_cell *);
static void tty_colours_bg(struct tty *, const struct grid_cell *);
static void tty_colours_us(struct tty *, const struct grid_cell *);
static void tty_region_pane(struct tty *, const struct tty_ctx *, u_int,
u_int);
@ -1287,6 +1290,7 @@ tty_draw_line(struct tty *tty, struct window_pane *wp, struct screen *s,
gcp->attr != last.attr ||
gcp->fg != last.fg ||
gcp->bg != last.bg ||
gcp->us != last.us ||
ux + width + gcp->data.width > nx ||
(sizeof buf) - len < gcp->data.size)) {
tty_attributes(tty, &last, wp);
@ -2135,7 +2139,8 @@ tty_attributes(struct tty *tty, const struct grid_cell *gc,
~(wp->flags & PANE_STYLECHANGED) &&
gc->attr == tty->last_cell.attr &&
gc->fg == tty->last_cell.fg &&
gc->bg == tty->last_cell.bg)
gc->bg == tty->last_cell.bg &&
gc->us == tty->last_cell.us)
return;
tty->last_wp = (wp != NULL ? (int)wp->id : -1);
memcpy(&tty->last_cell, gc, sizeof tty->last_cell);
@ -2163,14 +2168,18 @@ tty_attributes(struct tty *tty, const struct grid_cell *gc,
/* Fix up the colours if necessary. */
tty_check_fg(tty, wp, &gc2);
tty_check_bg(tty, wp, &gc2);
tty_check_us(tty, wp, &gc2);
/* If any bits are being cleared, reset everything. */
if (tc->attr & ~gc2.attr)
/*
* If any bits are being cleared or the underline colour is now default,
* reset everything.
*/
if ((tc->attr & ~gc2.attr) || (tc->us != gc2.us && gc2.us == 0))
tty_reset(tty);
/*
* Set the colours. This may call tty_reset() (so it comes next) and
* may add to (NOT remove) the desired attributes by changing new_attr.
* may add to (NOT remove) the desired attributes.
*/
tty_colours(tty, &gc2);
@ -2223,7 +2232,7 @@ tty_colours(struct tty *tty, const struct grid_cell *gc)
int have_ax;
/* No changes? Nothing is necessary. */
if (gc->fg == tc->fg && gc->bg == tc->bg)
if (gc->fg == tc->fg && gc->bg == tc->bg && gc->us == tc->us)
return;
/*
@ -2271,6 +2280,10 @@ tty_colours(struct tty *tty, const struct grid_cell *gc)
*/
if (!COLOUR_DEFAULT(gc->bg) && gc->bg != tc->bg)
tty_colours_bg(tty, gc);
/* Set the underscore color. */
if (gc->us != tc->us)
tty_colours_us(tty, gc);
}
static void
@ -2385,6 +2398,22 @@ tty_check_bg(struct tty *tty, struct window_pane *wp, struct grid_cell *gc)
gc->bg -= 90;
}
static void
tty_check_us(__unused struct tty *tty, struct window_pane *wp, struct grid_cell *gc)
{
int c;
/* Perform substitution if this pane has a palette. */
if (~gc->flags & GRID_FLAG_NOPALETTE) {
if ((c = window_pane_get_palette(wp, gc->us)) != -1)
gc->us = c;
}
/* Underscore colour is set as RGB so convert a 256 colour to RGB. */
if (gc->us & COLOUR_FLAG_256)
gc->us = colour_256toRGB (gc->us);
}
static void
tty_colours_fg(struct tty *tty, const struct grid_cell *gc)
{
@ -2449,6 +2478,31 @@ save_bg:
tc->bg = gc->bg;
}
static void
tty_colours_us(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
u_int c;
u_char r, g, b;
/* Must be an RGB colour - this should never happen. */
if (~gc->us & COLOUR_FLAG_RGB)
return;
/*
* Setulc follows the ncurses(3) one argument "direct colour"
* capability format. Calculate the colour value.
*/
colour_split_rgb(gc->us, &r, &g, &b);
c = (65536 * r) + (256 * g) + b;
/* Write the colour. */
tty_putcode1(tty, TTYC_SETULC, c);
/* Save the new values in the terminal current cell. */
tc->us = gc->us;
}
static int
tty_try_colour(struct tty *tty, int colour, const char *type)
{