opt: optimize layer cover

src/action/client.h

@@ -181,7 +181,8 @@ void client_set_tab_node_visible(Client *c) {
 	while (cur) {
 		if (!c->mon->isoverview && cur->tab_bar_node &&
 			(cur->group_next || cur->group_prev) && VISIBLEON(c, c->mon) &&
-			ISSCROLLTILED(c) && !c->isfullscreen) {
+			ISSCROLLTILED(c) && !c->isfullscreen &&
+			(!is_monocle_layout(c->mon) || c == c->mon->sel)) {
 			wlr_scene_node_set_enabled(&cur->tab_bar_node->scene_buffer->node,
 									   true);
 		} else {
@@ -190,4 +191,24 @@ void client_set_tab_node_visible(Client *c) {
 		}
 		cur = cur->group_next;
 	}
+}
+
+void client_raise_group_tab_bar(Client *c) {
+	if (!c || !c->mon)
+		return;
+
+	if (!c->group_prev && !c->group_next)
+		return;
+
+	Client *head = c;
+	while (head->group_prev)
+		head = head->group_prev;
+
+	Client *cur = head;
+	while (cur) {
+		if (cur->tab_bar_node) {
+			wlr_scene_node_raise_to_top(&cur->tab_bar_node->scene_buffer->node);
+		}
+		cur = cur->group_next;
+	}
 }

src/mango.c

@@ -170,8 +170,9 @@ enum {
 	LyrBg,
 	LyrBlur,
 	LyrBottom,
-	LyrDecorate,
 	LyrTile,
+	LyrDecorate,
+	LyrMaximize,
 	LyrTop,
 	LyrFadeOut,
 	LyrOverlay,
@@ -5761,6 +5762,7 @@ void setmaximizescreen(Client *c, int32_t maximizescreen, bool rearrange) {
 		}
 
 		wlr_scene_node_raise_to_top(&c->scene->node);
+		client_raise_group_tab_bar(c);
 		if (!is_scroller_layout(c->mon) || c->isfloating)
 			resize(c, maximizescreen_box, 0);
 	} else {
@@ -5770,7 +5772,9 @@ void setmaximizescreen(Client *c, int32_t maximizescreen, bool rearrange) {
 	}
 
 	wlr_scene_node_reparent(&c->scene->node,
-							layers[c->isfloating ? LyrTop : LyrTile]);
+							layers[c->ismaximizescreen ? LyrMaximize
+								   : c->isfloating	   ? LyrTop
+													   : LyrTile]);
 
 	if (!c->force_fakemaximize && !c->ismaximizescreen) {
 		client_set_maximized(c, false);