static void createpopup(struct wl_listener *listener, void *data);

	if (c->surface.xdg->initial_commit)
		wlr_xdg_toplevel_set_wm_capabilities(c->surface.xdg->toplevel, WLR_XDG_TOPLEVEL_WM_CAPABILITIES_FULLSCREEN);

	/* This event is raised when wlr_xdg_shell receives a new xdg surface from a
	 * client, either a toplevel (application window) or popup,
	 * or when wlr_layer_shell receives a new popup from a layer.
	 * If you want to do something tricky with popups you should check if
	 * its parent is wlr_xdg_shell or wlr_layer_shell */
	struct wlr_xdg_surface *xdg_surface = data;

	/* This event is raised when a client creates a new toplevel (application window). */
	struct wlr_xdg_toplevel *toplevel = data;

	LayerSurface *l = NULL;
	if (xdg_surface->role == WLR_XDG_SURFACE_ROLE_POPUP) {
		struct wlr_box box;
		int type = toplevel_from_wlr_surface(xdg_surface->surface, &c, &l);
		if (!xdg_surface->popup->parent || type < 0)
			return;
		xdg_surface->surface->data = wlr_scene_xdg_surface_create(
				xdg_surface->popup->parent->data, xdg_surface);
		if ((l && !l->mon) || (c && !c->mon))
			return;
		box = type == LayerShell ? l->mon->m : c->mon->w;
		box.x -= (type == LayerShell ? l->geom.x : c->geom.x);
		box.y -= (type == LayerShell ? l->geom.y : c->geom.y);
		wlr_xdg_popup_unconstrain_from_box(xdg_surface->popup, &box);
		return;
	} else if (xdg_surface->role == WLR_XDG_SURFACE_ROLE_NONE)
		return;

	c = xdg_surface->data = ecalloc(1, sizeof(*c));
	c->surface.xdg = xdg_surface;

	c = toplevel->base->data = ecalloc(1, sizeof(*c));
	c->surface.xdg = toplevel->base;

	wlr_xdg_toplevel_set_wm_capabilities(xdg_surface->toplevel,
			WLR_XDG_TOPLEVEL_WM_CAPABILITIES_FULLSCREEN);

	LISTEN(&xdg_surface->surface->events.commit, &c->commit, commitnotify);
	LISTEN(&xdg_surface->surface->events.map, &c->map, mapnotify);
	LISTEN(&xdg_surface->surface->events.unmap, &c->unmap, unmapnotify);
	LISTEN(&xdg_surface->events.destroy, &c->destroy, destroynotify);
	LISTEN(&xdg_surface->toplevel->events.set_title, &c->set_title, updatetitle);
	LISTEN(&xdg_surface->toplevel->events.request_fullscreen, &c->fullscreen,
			fullscreennotify);
	LISTEN(&xdg_surface->toplevel->events.request_maximize, &c->maximize,
			maximizenotify);

	LISTEN(&toplevel->base->surface->events.commit, &c->commit, commitnotify);
	LISTEN(&toplevel->base->surface->events.map, &c->map, mapnotify);
	LISTEN(&toplevel->base->surface->events.unmap, &c->unmap, unmapnotify);
	LISTEN(&toplevel->events.destroy, &c->destroy, destroynotify);
	LISTEN(&toplevel->events.request_fullscreen, &c->fullscreen, fullscreennotify);
	LISTEN(&toplevel->events.request_maximize, &c->maximize, maximizenotify);
	LISTEN(&toplevel->events.set_title, &c->set_title, updatetitle);

}
void
createpopup(struct wl_listener *listener, void *data)
{
	/* This event is raised when a client (either xdg-shell or layer-shell)
	 * creates a new popup. */
	struct wlr_xdg_popup *popup = data;
	LayerSurface *l = NULL;
	Client *c = NULL;
	struct wlr_box box;
	int type = toplevel_from_wlr_surface(popup->base->surface, &c, &l);
	if (!popup->parent || type < 0)
		return;
	popup->base->surface->data = wlr_scene_xdg_surface_create(
			popup->parent->data, popup->base);
	if ((l && !l->mon) || (c && !c->mon))
		return;
	box = type == LayerShell ? l->mon->m : c->mon->w;
	box.x -= (type == LayerShell ? l->geom.x : c->geom.x);
	box.y -= (type == LayerShell ? l->geom.y : c->geom.y);
	/* FIXME: this send a configure event to a uninitialized wlr_xdg_surface */
	wlr_xdg_popup_unconstrain_from_box(popup, &box);

	LISTEN_STATIC(&xdg_shell->events.new_surface, createnotify);

	LISTEN_STATIC(&xdg_shell->events.new_toplevel, createnotify);
	LISTEN_STATIC(&xdg_shell->events.new_popup, createpopup);