fix hiding lone titlebar

sway/desktop/transaction.c

@@ -287,14 +287,13 @@ static void arrange_container(struct sway_container *con,
 
 static void arrange_children(enum sway_container_layout layout, list_t *children,
 		struct sway_container *active, struct wlr_scene_tree *content,
-		int width, int height, int gaps) {
+		int width, int height, int gaps, bool parent_asks_for_title_bars) {
 	int title_bar_height = container_titlebar_height();
 
 	if (layout == L_TABBED) {
-		struct sway_container *first = children->length == 1 ?
-			((struct sway_container *)children->items[0]) : NULL;
-		if (config->hide_lone_tab && first && first->view &&
-				first->current.border != B_NORMAL) {
+		bool show_titlebar = parent_asks_for_title_bars || !config->hide_lone_tab ||
+			(children->length > 1);
+		if (!show_titlebar) {
 			title_bar_height = 0;
 		}
 
@@ -312,19 +311,17 @@ static void arrange_children(enum sway_container_layout layout, list_t *children
 			wlr_scene_node_reparent(&child->scene_tree->node, content);
 
 			if (activated) {
-				arrange_container(child, width, height - title_bar_height,
-					false, 0);
+				arrange_container(child, width, height - title_bar_height, false, 0);
 			} else {
 				disable_container(child);
 			}
 
 			title_offset = next_title_offset;
 		}
 	} else if (layout == L_STACKED) {
-		struct sway_container *first = children->length == 1 ?
-			((struct sway_container *)children->items[0]) : NULL;
-		if (config->hide_lone_tab && first && first->view &&
-				first->current.border != B_NORMAL) {
+		bool show_titlebar = parent_asks_for_title_bars || !config->hide_lone_tab ||
+			(children->length > 1);
+		if (!show_titlebar) {
 			title_bar_height = 0;
 		}
 
@@ -341,8 +338,7 @@ static void arrange_children(enum sway_container_layout layout, list_t *children
 			wlr_scene_node_reparent(&child->scene_tree->node, content);
 
 			if (activated) {
-				arrange_container(child, width, height - title_height,
-					false, 0);
+				arrange_container(child, width, height - title_height, false, 0);
 			} else {
 				disable_container(child);
 			}
@@ -351,7 +347,8 @@ static void arrange_children(enum sway_container_layout layout, list_t *children
 		}
 	} else if (layout == L_VERT) {
 		int off = 0;
-		bool show_titlebar = !config->hide_lone_tab || (children->length > 1);
+		bool show_titlebar = parent_asks_for_title_bars || !config->hide_lone_tab ||
+			(children->length > 1);
 		for (int i = 0; i < children->length; i++) {
 			struct sway_container *child = children->items[i];
 			int cheight = child->current.height;
@@ -364,7 +361,8 @@ static void arrange_children(enum sway_container_layout layout, list_t *children
 		}
 	} else if (layout == L_HORIZ) {
 		int off = 0;
-		bool show_titlebar = !config->hide_lone_tab || (children->length > 1);
+		bool show_titlebar = parent_asks_for_title_bars || !config->hide_lone_tab ||
+			(children->length > 1);
 		for (int i = 0; i < children->length; i++) {
 			struct sway_container *child = children->items[i];
 			int cwidth = child->current.width;
@@ -454,7 +452,7 @@ static void arrange_container(struct sway_container *con,
 
 		arrange_children(con->current.layout, con->current.children,
 			con->current.focused_inactive_child, con->content_tree,
-			width, height, gaps);
+			width, height, gaps, title_bar);
 	}
 }
 
@@ -534,7 +532,7 @@ static void arrange_workspace_tiling(struct sway_workspace *ws,
 		int width, int height) {
 	arrange_children(ws->current.layout, ws->current.tiling,
 		ws->current.focused_inactive_child, ws->layers.tiling,
-		width, height, ws->gaps_inner);
+		width, height, ws->gaps_inner, false);
 }
 
 static void disable_workspace(struct sway_workspace *ws) {