Suckless/dwm-6.5/patch/bar_ewmhtags.c

void
setcurrentdesktop(void)
{
	long data[] = { 0 };
	XChangeProperty(dpy, root, netatom[NetCurrentDesktop], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 1);
}

void
setdesktopnames(void)
{
	int i;
	XTextProperty text;
	char *tags[NUMTAGS];
	for (i = 0; i < NUMTAGS; i++)
		tags[i] = tagicon(selmon, i);
	Xutf8TextListToTextProperty(dpy, tags, NUMTAGS, XUTF8StringStyle, &text);
	XSetTextProperty(dpy, root, &text, netatom[NetDesktopNames]);
}

void
setfloatinghint(Client *c)
{
	Atom target = XInternAtom(dpy, "_IS_FLOATING", 0);
	unsigned int floating[1] = {c->isfloating};
	XChangeProperty(dpy, c->win, target, XA_CARDINAL, 32, PropModeReplace, (unsigned char *)floating, 1);
}

void
setnumdesktops(void)
{
	long data[] = { NUMTAGS };
	XChangeProperty(dpy, root, netatom[NetNumberOfDesktops], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 1);
}

void
setviewport(void)
{
	long data[] = { 0, 0 };
	XChangeProperty(dpy, root, netatom[NetDesktopViewport], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 2);
}

void
updatecurrentdesktop(void)
{
	long rawdata[] = { selmon->tagset[selmon->seltags] };
	int i = 0;
	while (*rawdata >> (i + 1)) {
		i++;
	}
	long data[] = { i };
	XChangeProperty(dpy, root, netatom[NetCurrentDesktop], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 1);
}