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

Hide the titleb bar on containers with one child

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 +13,16 @@ 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_tab = true;
+		hide_lone_title = true;
+		++argv;
+		--argc;
 	}
 
 	if (!argc) {
@@ -41,6 +47,7 @@ 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/desktop/render.c

@@ -689,7 +689,8 @@ static void render_container(struct render_context *ctx,
  * they'll apply their own borders to their children.
  */
 static void render_containers_linear(struct render_context *ctx, struct parent_data *parent) {
-	for (int i = 0; i < parent->children->length; ++i) {
+	int children_length = parent->children->length;
+	for (int i = 0; i < children_length; ++i) {
 		struct sway_container *child = parent->children->items[i];
 
 		if (child->view) {
@@ -718,9 +719,11 @@ static void render_containers_linear(struct render_context *ctx, struct parent_d
 			}
 
 			if (state->border == B_NORMAL) {
-				render_titlebar(ctx, child, floor(state->x),
-						floor(state->y), state->width, colors,
-						title_texture, marks_texture);
+				if(!config->hide_lone_title || children_length > 1) {
+					render_titlebar(ctx, child, floor(state->x),
+							floor(state->y), state->width, colors,
+							title_texture, marks_texture);
+				}
 			} else if (state->border == B_PIXEL) {
 				render_top_border(ctx, child, colors);
 			}

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 any container 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

@@ -343,9 +343,16 @@ void view_autoconfigure(struct sway_view *view) {
 			y = con->pending.y + y_offset;
 			height = con->pending.height - y_offset
 				- con->pending.border_thickness * con->pending.border_bottom;
-		} else {
-			y = con->pending.y + container_titlebar_height();
-			height = con->pending.height - container_titlebar_height()
+		} else  {
+			list_t *siblings = container_get_siblings(con);
+			int titlebar_height;
+			if (config->hide_lone_title && siblings && siblings->length < 2) {
+				titlebar_height = con->pending.border_thickness * con->pending.border_top + y_offset;
+			} else {
+				titlebar_height = container_titlebar_height();
+			}
+			y = con->pending.y + titlebar_height;
+			height = con->pending.height - titlebar_height
 				- con->pending.border_thickness * con->pending.border_bottom;
 		}
 		break;