static Client *

prevtiled(Client *c) {

	Client *p, *r;

	for(p = selmon->clients, r = NULL; p && p != c; p = p->next)

		if(!p->isfloating && ISVISIBLE(p))

			r = p;

	return r;

}

static void

pushup(const Arg *arg) {

	Client *sel = selmon->sel;

	Client *c;

	if(!sel || sel->isfloating)

		return;

	if((c = prevtiled(sel))) {

		/* attach before c */

		detach(sel);

		sel->next = c;

		if(selmon->clients == c)

			selmon->clients = sel;

		else {

			for(c = selmon->clients; c->next != sel->next; c = c->next);

			c->next = sel;

		}

	} else {

		/* move to the end */

		for(c = sel; c->next; c = c->next);

		detach(sel);

		sel->next = NULL;

		c->next = sel;

	}

	focus(sel);

	arrange(selmon);

}

static void

pushdown(const Arg *arg) {

	Client *sel = selmon->sel;

	Client *c;

	if(!sel || sel->isfloating)

		return;

	if((c = nexttiled(sel->next))) {

		/* attach after c */

		detach(sel);

		sel->next = c->next;

		c->next = sel;

	} else {

		/* move to the front */

		detach(sel);

		attach(sel);

	}

	focus(sel);

	arrange(selmon);

}