#define VISIBLEON(C, M)         ((C)->mon == (M))

#define VISIBLEON(C, M)         ((C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags]))

#define TAGMASK                 ((1 << LENGTH(tags)) - 1)

	unsigned int tags;

	unsigned int seltags;

	unsigned int tagset[2];

static void tag(const Arg *arg);

static void view(const Arg *arg);

	m->tagset[0] = m->tagset[1] = 1;

	c->tags = c->mon->tagset[c->mon->seltags];

		/* Only render clients which are on this monitor. */
		/* XXX consider checking wlr_output_layout_intersects, in case a
		 * window can be seen on multiple outputs */
		if (!VISIBLEON(c, m))
			continue;

		wlr_xdg_surface_for_each_surface(c->xdg_surface,
				render, &rdata);

		wlr_xdg_surface_for_each_surface(c->xdg_surface, render, &rdata);

	}
}
void
tag(const Arg *arg)
{
	Client *sel = selclient();
	if (sel && arg->ui & TAGMASK) {
		sel->tags = arg->ui & TAGMASK;
		focus(NULL, NULL);

}
void
view(const Arg *arg)
{
	if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
		return;
	selmon->seltags ^= 1; /* toggle sel tagset */
	if (arg->ui & TAGMASK)
		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
	focus(NULL, NULL);

/* tagging */
static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };

#define TAGKEYS(KEY,SKEY,TAG) \
	{ MODKEY,                    KEY,            view,            {.ui = 1 << TAG} }, \
	{ MODKEY|WLR_MODIFIER_SHIFT, SKEY,           tag,             {.ui = 1 << TAG} }

	{ MODKEY,                    XKB_KEY_Tab,        view,           {0} },

	{ MODKEY,                    XKB_KEY_0,          view,           {.ui = ~0} },
	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_parenright, tag,            {.ui = ~0} },
	TAGKEYS(          XKB_KEY_1, XKB_KEY_exclam,                     0),
	TAGKEYS(          XKB_KEY_2, XKB_KEY_at,                         1),
	TAGKEYS(          XKB_KEY_3, XKB_KEY_numbersign,                 2),
	TAGKEYS(          XKB_KEY_4, XKB_KEY_dollar,                     3),
	TAGKEYS(          XKB_KEY_5, XKB_KEY_percent,                    4),
	TAGKEYS(          XKB_KEY_6, XKB_KEY_caret,                      5),
	TAGKEYS(          XKB_KEY_7, XKB_KEY_ampersand,                  6),
	TAGKEYS(          XKB_KEY_8, XKB_KEY_asterisk,                   7),
	TAGKEYS(          XKB_KEY_9, XKB_KEY_parenleft,                  8),