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Support OSC 110, 111, and 112 for resetting colors

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This adds support for OSC 110, 111, and 112 escape sequences to reset
the foreground, background, and cursor colors in the terminal. The
changes include handling these sequences in the `strhandle` function of
`st.c`, allowing applications to reset colors to their default values.

The OSC sequences originated from Xterm control sequences and are now
widely used in terminal applications and supported by many terminal
emulators. For applications, this allows them to reset colors to
default values without needing to know the colors beforehand.

Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
This commit is contained in:
Ayman Bagabas 2025-08-08 17:11:59 -04:00 committed by Hiltjo Posthuma
parent f114bcedd1
commit d6c431859c
1 changed files with 13 additions and 0 deletions
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13
st.c
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@ -1967,6 +1967,19 @@ strhandle(void)
tfulldirt();
}
return;
case 110:
case 111:
case 112:
if (narg != 1)
break;
if ((j = par - 110) < 0 || j >= LEN(osc_table))
break; /* shouldn't be possible */
if (xsetcolorname(osc_table[j].idx, NULL)) {
fprintf(stderr, "erresc: %s color not found\n", osc_table[j].str);
} else {
tfulldirt();
}
return;
}
break;
case 'k': /* old title set compatibility */