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support colons in SGR character attributes

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Patch by Mikhail Kot <to@myrrc.dev>
With some modifications to behave more like xterm (see note below).

Example:

	printf '\033[48;2;255:0:0mtest\n'

https://invisible-island.net/xterm/ctlseqs/ctlseqs.html

Some notes:

"CSI Pm m  Character Attributes (SGR).
[...]
o   xterm allows either colons (standard) or semicolons
(legacy) to separate the subparameters (but after the
first colon, colons must be used).
This commit is contained in:
Hiltjo Posthuma 2024-05-01 20:45:39 +02:00
parent d63b9eb902
commit 5dbcca4926
1 changed files with 4 additions and 1 deletions
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st.c
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@ -1132,6 +1132,7 @@ csiparse(void)
{ {
char *p = csiescseq.buf, *np; char *p = csiescseq.buf, *np;
long int v; long int v;
int sep = ';'; /* colon or semi-colon, but not both */
csiescseq.narg = 0; csiescseq.narg = 0;
if (*p == '?') { if (*p == '?') {
@ -1149,7 +1150,9 @@ csiparse(void)
v = -1; v = -1;
csiescseq.arg[csiescseq.narg++] = v; csiescseq.arg[csiescseq.narg++] = v;
p = np; p = np;
if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ) if (sep == ';' && *p == ':')
sep = ':'; /* allow override to colon once */
if (*p != sep || csiescseq.narg == ESC_ARG_SIZ)
break; break;
p++; p++;
} }