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Setting SGR0 when setting the fg and bg has problems if only one of the two is 

meant to be default, so rewrite the code to move this outside, move setting
colours before attributes and generally clean up.

Tested by sthen@, fixes problems he was seeing with mutt and should fix some
existing problems with (rarely) lost attributes.
pull/1/head
Nicholas Marriott 2009-10-28 08:27:33 +00:00
parent 37ffdff5ba
commit eb5f4460d1
1 changed files with 144 additions and 87 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

231
tty.c
View File

@ -33,8 +33,9 @@ void tty_fill_acs(struct tty *);
int tty_try_256(struct tty *, u_char, const char *);
int tty_try_88(struct tty *, u_char, const char *);
void tty_attributes_fg(struct tty *, const struct grid_cell *);
void tty_attributes_bg(struct tty *, const struct grid_cell *);
void tty_colours(struct tty *, const struct grid_cell *, int *);
void tty_colours_fg(struct tty *, const struct grid_cell *, int *);
void tty_colours_bg(struct tty *, const struct grid_cell *, int *);
void tty_redraw_region(struct tty *, const struct tty_ctx *);
void tty_emulate_repeat(
@ -1120,14 +1121,23 @@ tty_attributes(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
u_char changed;
u_int fg, bg, attr;
u_int fg = gc->fg, bg = gc->bg, attr = gc->attr;
/* If any bits are being cleared, reset everything. */
if (tc->attr & ~attr)
tty_reset(tty);
/*
* Set the colours. This may call tty_reset() (so it comes next) and
* may add to the desired attributes in attr.
*/
tty_colours(tty, gc, &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)
@ -1138,10 +1148,6 @@ tty_attributes(struct tty *tty, const struct grid_cell *gc)
}
}
/* If any bits are being cleared, reset everything. */
if (tc->attr & ~attr)
tty_reset(tty);
/* Filter out attribute bits already set. */
changed = attr & ~tc->attr;
tc->attr = attr;
@ -1167,24 +1173,140 @@ tty_attributes(struct tty *tty, const struct grid_cell *gc)
tty_putcode(tty, TTYC_INVIS);
if (changed & GRID_ATTR_CHARSET)
tty_putcode(tty, TTYC_SMACS);
}
/* Set foreground colour. */
if (fg != tc->fg ||
(gc->flags & GRID_FLAG_FG256) != (tc->flags & GRID_FLAG_FG256)) {
tty_attributes_fg(tty, gc);
tc->fg = fg;
tc->flags &= ~GRID_FLAG_FG256;
tc->flags |= gc->flags & GRID_FLAG_FG256;
void
tty_colours(struct tty *tty, const struct grid_cell *gc, int *attr)
{
struct grid_cell *tc = &tty->cell;
u_char fg = gc->fg, bg = gc->bg;
int flags, have_ax;
int fg_default, bg_default;
/* No changes? Nothing is necessary. */
flags = (gc->flags ^ tc->flags) & (GRID_FLAG_FG256|GRID_FLAG_BG256);
if (fg == tc->fg && bg == tc->bg && flags == 0)
return;
/*
* Is either the default colour? This is handled specially because the
* best solution might be to reset both colours to default, in which
* case if only one is default need to fall onward to set the other
* colour.
*/
fg_default = (fg == 8 && !(gc->flags & GRID_FLAG_FG256));
bg_default = (bg == 8 && !(gc->flags & GRID_FLAG_BG256));
if (fg_default || bg_default) {
/*
* If don't have AX but do have op, send sgr0 (op can't
* actually be used because it is sometimes the same as sgr0
* and sometimes isn't). This resets both colours to default.
*
* Otherwise, try to set the default colour only as needed.
*/
have_ax = tty_term_has(tty->term, TTYC_AX);
if (!have_ax && tty_term_has(tty->term, TTYC_OP))
tty_reset(tty);
else {
if (fg_default &&
fg != tc->fg && !(tc->flags & GRID_FLAG_FG256)) {
if (have_ax)
tty_puts(tty, "\033[39m");
else if (tc->fg != 7)
tty_putcode1(tty, TTYC_SETAF, 7);
tc->fg = 8;
tc->flags &= ~GRID_FLAG_FG256;
}
if (bg_default &&
bg != tc->bg && !(tc->flags & GRID_FLAG_BG256)) {
if (have_ax)
tty_puts(tty, "\033[49m");
else if (tc->bg != 0)
tty_putcode1(tty, TTYC_SETAB, 0);
tc->bg = 8;
tc->flags &= ~GRID_FLAG_BG256;
}
}
}
/* Set background colour. */
if (bg != tc->bg ||
(gc->flags & GRID_FLAG_BG256) != (tc->flags & GRID_FLAG_BG256)) {
tty_attributes_bg(tty, gc);
tc->bg = bg;
tc->flags &= ~GRID_FLAG_BG256;
tc->flags |= gc->flags & GRID_FLAG_BG256;
/* Set the foreground colour. */
if (!fg_default && (fg != tc->fg ||
((gc->flags & GRID_FLAG_FG256) != (tc->flags & GRID_FLAG_FG256))))
tty_colours_fg(tty, gc, attr);
/*
* Set the background colour. This must come after the foreground as
* tty_colour_fg() can call tty_reset().
*/
if (!bg_default && (bg != tc->bg ||
((gc->flags & GRID_FLAG_BG256) != (tc->flags & GRID_FLAG_BG256))))
tty_colours_bg(tty, gc, attr);
}
void
tty_colours_fg(struct tty *tty, const struct grid_cell *gc, int *attr)
{
struct grid_cell *tc = &tty->cell;
u_char fg = gc->fg;
/* Is this a 256-colour colour? */
if (gc->flags & GRID_FLAG_FG256) {
/* Try as 256 colours or translating to 88. */
if (tty_try_256(tty, fg, "38") == 0)
goto save_fg;
if (tty_try_88(tty, fg, "38") == 0)
goto save_fg;
/* Translate to 16-colour palette, updating bold if needed. */
fg = colour_256to16(fg);
if (fg & 8) {
fg &= 7;
(*attr) |= GRID_ATTR_BRIGHT;
} else
tty_reset(tty); /* turn off bold */
}
/* Otherwise set the foreground colour. */
tty_putcode1(tty, TTYC_SETAF, fg);
save_fg:
/* Save the new values in the terminal current cell. */
tc->fg = fg;
tc->flags &= ~GRID_FLAG_FG256;
tc->flags |= gc->flags & GRID_FLAG_FG256;
}
void
tty_colours_bg(struct tty *tty, const struct grid_cell *gc, unused int *attr)
{
struct grid_cell *tc = &tty->cell;
u_char bg = gc->bg;
/* 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;
/*
* Translate to 16-colour palette. Bold background doesn't
* exist portably, so just discard the bold bit if set.
*/
bg = colour_256to16(bg);
if (bg & 8)
bg &= 7;
}
/* 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;
}
int
@ -1215,68 +1337,3 @@ tty_try_88(struct tty *tty, u_char colour, const char *type)
tty_puts(tty, s);
return (0);
}
void
tty_attributes_fg(struct tty *tty, const struct grid_cell *gc)
{
u_char fg;
fg = gc->fg;
if (gc->flags & GRID_FLAG_FG256) {
if (tty_try_256(tty, fg, "38") == 0)
return;
if (tty_try_88(tty, fg, "38") == 0)
return;
fg = colour_256to16(fg);
if (fg & 8) {
fg &= 7;
tty_putcode(tty, TTYC_BOLD);
tty->cell.attr |= GRID_ATTR_BRIGHT;
} else if (tty->cell.attr & GRID_ATTR_BRIGHT)
tty_reset(tty);
}
if (fg == 8) {
if (tty_term_has(tty->term, TTYC_AX)) {
/* AX is an extension that means \033[39m works. */
tty_puts(tty, "\033[39m");
} else if (tty_term_has(tty->term, TTYC_OP)) {
/*
* op can be used to look for default colours but there
* is no point in using it - with some terminals it
* does SGR0 and others not, so SGR0 is needed anyway
* to put the terminal into a known state.
*/
tty_reset(tty);
} else
tty_putcode1(tty, TTYC_SETAF, 7);
} else
tty_putcode1(tty, TTYC_SETAF, fg);
}
void
tty_attributes_bg(struct tty *tty, const struct grid_cell *gc)
{
u_char bg;
bg = gc->bg;
if (gc->flags & GRID_FLAG_BG256) {
if (tty_try_256(tty, bg, "48") == 0)
return;
if (tty_try_88(tty, bg, "48") == 0)
return;
bg = colour_256to16(bg);
if (bg & 8)
bg &= 7;
}
if (bg == 8) {
if (tty_term_has(tty->term, TTYC_AX)) {
tty_puts(tty, "\033[49m");
} else if (tty_term_has(tty->term, TTYC_OP))
tty_reset(tty);
else
tty_putcode1(tty, TTYC_SETAB, 0);
} else
tty_putcode1(tty, TTYC_SETAB, bg);
}