opt: allow switch focus between fullscreen and floating window in focusstack

src/dispatch/bind_define.h

@@ -212,7 +212,7 @@ int focusstack(const Arg *arg) {
 	Client *sel = focustop(selmon);
 	Client *tc = NULL;
 
-	if (!sel || (sel->isfullscreen && !client_has_children(sel)))
+	if (!sel)
 		return 0;
 	if (arg->i == NEXT) {
 		tc = get_next_stack_client(sel, false);

src/fetch/client.h

@@ -343,11 +343,17 @@ Client *get_next_stack_client(Client *c, bool reverse) {
 	Client *next = NULL;
 	if (reverse) {
 		wl_list_for_each_reverse(next, &c->link, link) {
+			if (c->mon->has_visible_fullscreen_client && !next->isfloating &&
+				!next->isfullscreen)
+				continue;
 			if (VISIBLEON(next, c->mon) && next != c)
 				return next;
 		}
 	} else {
 		wl_list_for_each(next, &c->link, link) {
+			if (c->mon->has_visible_fullscreen_client && !next->isfloating &&
+				!next->isfullscreen)
+				continue;
 			if (VISIBLEON(next, c->mon) && next != c)
 				return next;
 		}

src/layout/arrange.h

@@ -592,6 +592,7 @@ arrange(Monitor *m, bool want_animation) {
 		return;
 	m->visible_clients = 0;
 	m->visible_tiling_clients = 0;
+	m->has_visible_fullscreen_client = false;
 
 	wl_list_for_each(c, &clients, link) {
 
@@ -603,6 +604,10 @@ arrange(Monitor *m, bool want_animation) {
 
 		if (VISIBLEON(c, m)) {
 			m->visible_clients++;
+
+			if (c->isfullscreen)
+				m->has_visible_fullscreen_client = true;
+
 			if (ISTILED(c)) {
 				m->visible_tiling_clients++;
 			}

src/mango.c

@@ -443,6 +443,7 @@ struct Monitor {
 	int asleep;
 	unsigned int visible_clients;
 	unsigned int visible_tiling_clients;
+	bool has_visible_fullscreen_client;
 	struct wlr_scene_optimized_blur *blur;
 	char last_surface_ws_name[256];
 	struct wlr_ext_workspace_group_handle_v1 *ext_group;
@@ -4531,7 +4532,6 @@ void setfullscreen(Client *c, int fullscreen) // 用自定义全屏代理自带
 		wlr_scene_node_raise_to_top(&c->scene->node); // 将视图提升到顶层
 		resize(c, c->mon->m, 1);
 		c->isfullscreen = 1;
-		// c->isfloating = 0;
 	} else {
 		c->bw = c->isnoborder ? 0 : borderpx;
 		c->isfullscreen = 0;