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Add support for OSC color sequences

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This commit is contained in:
Raheman Vaiya 2021-12-26 18:57:04 +01:00 committed by Hiltjo Posthuma
parent 2f6e597ed8
commit 8e31030390
4 changed files with 100 additions and 4 deletions
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8
config.def.h
View File

@ -120,6 +120,8 @@ static const char *colorname[] = {
/* more colors can be added after 255 to use with DefaultXX */
"#cccccc",
"#555555",
"gray90", /* default foreground colour */
"black", /* default background colour */
};
@ -127,9 +129,9 @@ static const char *colorname[] = {
* Default colors (colorname index)
* foreground, background, cursor, reverse cursor
*/
unsigned int defaultfg = 7;
unsigned int defaultbg = 0;
static unsigned int defaultcs = 256;
unsigned int defaultfg = 258;
unsigned int defaultbg = 259;
unsigned int defaultcs = 256;
static unsigned int defaultrcs = 257;
/*

80
st.c
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@ -1842,6 +1842,42 @@ csireset(void)
memset(&csiescseq, 0, sizeof(csiescseq));
}
void
osc4_color_response(int num)
{
int n;
char buf[32];
unsigned char r, g, b;
if (xgetcolor(num, &r, &g, &b)) {
fprintf(stderr, "erresc: failed to fetch osc4 color %d\n", num);
return;
}
n = snprintf(buf, sizeof buf, "\033]4;%d;rgb:%02x%02x/%02x%02x/%02x%02x\007",
num, r, r, g, g, b, b);
ttywrite(buf, n, 1);
}
void
osc_color_response(int index, int num)
{
int n;
char buf[32];
unsigned char r, g, b;
if (xgetcolor(index, &r, &g, &b)) {
fprintf(stderr, "erresc: failed to fetch osc color %d\n", index);
return;
}
n = snprintf(buf, sizeof buf, "\033]%d;rgb:%02x%02x/%02x%02x/%02x%02x\007",
num, r, r, g, g, b, b);
ttywrite(buf, n, 1);
}
void
strhandle(void)
{
@ -1880,6 +1916,45 @@ strhandle(void)
}
}
return;
case 10:
if (narg < 2)
break;
p = strescseq.args[1];
if (!strcmp(p, "?"))
osc_color_response(defaultfg, 10);
else if (xsetcolorname(defaultfg, p))
fprintf(stderr, "erresc: invalid foreground color: %s\n", p);
else
redraw();
break;
case 11:
if (narg < 2)
break;
p = strescseq.args[1];
if (!strcmp(p, "?"))
osc_color_response(defaultbg, 11);
else if (xsetcolorname(defaultbg, p))
fprintf(stderr, "erresc: invalid background color: %s\n", p);
else
redraw();
break;
case 12:
if (narg < 2)
break;
p = strescseq.args[1];
if (!strcmp(p, "?"))
osc_color_response(defaultcs, 12);
else if (xsetcolorname(defaultcs, p))
fprintf(stderr, "erresc: invalid cursor color: %s\n", p);
else
redraw();
break;
case 4: /* color set */
if (narg < 3)
break;
@ -1887,7 +1962,10 @@ strhandle(void)
/* FALLTHROUGH */
case 104: /* color reset, here p = NULL */
j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
if (xsetcolorname(j, p)) {
if (!strcmp(p, "?"))
osc4_color_response(j);
else if (xsetcolorname(j, p)) {
if (par == 104 && narg <= 1)
return; /* color reset without parameter */
fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",

3
st.h
View File

@ -111,6 +111,8 @@ void *xmalloc(size_t);
void *xrealloc(void *, size_t);
char *xstrdup(const char *);
int xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b);
/* config.h globals */
extern char *utmp;
extern char *scroll;
@ -123,3 +125,4 @@ extern char *termname;
extern unsigned int tabspaces;
extern unsigned int defaultfg;
extern unsigned int defaultbg;
extern unsigned int defaultcs;

13
x.c
View File

@ -799,6 +799,19 @@ xloadcols(void)
loaded = 1;
}
int
xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b)
{
if (!BETWEEN(x, 0, dc.collen))
return 1;
*r = dc.col[x].color.red >> 8;
*g = dc.col[x].color.green >> 8;
*b = dc.col[x].color.blue >> 8;
return 0;
}
int
xsetcolorname(int x, const char *name)
{