add --title flag to hide_edge_borders, fix swaywm#7409

include/sway/config.h

@@ -556,6 +556,7 @@ struct sway_config {
 	enum edge_border_types hide_edge_borders;
 	enum edge_border_smart_types hide_edge_borders_smart;
 	bool hide_lone_tab;
+	bool hide_lone_title;
 
 	// border colors
 	struct {

sway/commands/hide_edge_borders.c

@@ -13,10 +13,15 @@ struct cmd_results *cmd_hide_edge_borders(int argc, char **argv) {
 	}
 
 	bool hide_lone_tab = false;
+	bool hide_lone_title = false;
 	if (strcmp(*argv, "--i3") == 0) {
 		hide_lone_tab = true;
 		++argv;
 		--argc;
+	} else if (strcmp(*argv, "--title") == 0) {
+		hide_lone_title = true;
+		++argv;
+		--argc;
 	}
 
 	if (!argc) {
@@ -41,6 +46,7 @@ struct cmd_results *cmd_hide_edge_borders(int argc, char **argv) {
 		return cmd_results_new(CMD_INVALID, "%s", expected_syntax);
 	}
 	config->hide_lone_tab = hide_lone_tab;
+	config->hide_lone_title = hide_lone_title;
 
 	arrange_root();
 

sway/config.c

@@ -298,6 +298,7 @@ static void config_defaults(struct sway_config *config) {
 	config->hide_edge_borders = E_NONE;
 	config->hide_edge_borders_smart = ESMART_OFF;
 	config->hide_lone_tab = false;
+	config->hide_lone_title = false;
 
 	config->has_focused_tab_title = false;
 

sway/sway.5.scd

@@ -741,10 +741,11 @@ The default colors are:
 	This affects new workspaces only, and is used when the workspace doesn't
 	have its own gaps settings (see: workspace <ws> gaps ...).
 
-*hide_edge_borders* [--i3] none|vertical|horizontal|both|smart|smart_no_gaps
+*hide_edge_borders* [--i3 | --title] none|vertical|horizontal|both|smart|smart_no_gaps
 	Hides window borders adjacent to the screen edges. Default is _none_. The
 	_--i3_ option enables i3-compatible behavior to hide the title bar on
-	tabbed and stacked containers with one child. The _smart_|_smart_no_gaps_
+	tabbed and stacked containers with one child. The --title option hide
+	the title bar on containers with one child. The _smart_|_smart_no_gaps_
 	options are equivalent to setting _smart_borders_ smart|no_gaps and
 	_hide_edge_borders_ none.
 

sway/tree/view.c

@@ -300,7 +300,8 @@ void view_autoconfigure(struct sway_view *view) {
 		// bar, and disable any top border because we'll always have the title bar.
 		list_t *siblings = container_get_siblings(con);
 		bool show_titlebar = (siblings && siblings->length > 1)
-			|| !config->hide_lone_tab;
+			|| !config->hide_lone_tab
+			|| !config->hide_lone_title;
 		if (show_titlebar) {
 			enum sway_container_layout layout = container_parent_layout(con);
 			if (layout == L_TABBED) {