Hiding lone titlebar scenegraph

include/sway/config.h

@@ -564,6 +564,7 @@ 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

@@ -13,7 +13,13 @@ struct cmd_results *cmd_hide_edge_borders(int argc, char **argv) {
 	}
 
 	bool hide_lone_tab = false;
-	if (strcmp(*argv, "--i3") == 0) {
+	bool hide_lone_title = false;
+	if (strcmp(*argv, "--smart-titles") == 0) {
+		hide_lone_tab = true;
+		hide_lone_title = true;
+		++argv;
+		--argc;
+	} else if (strcmp(*argv, "--i3") == 0) {
 		hide_lone_tab = true;
 		++argv;
 		--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

@@ -306,6 +306,7 @@ 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/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);
 			}
@@ -351,26 +347,30 @@ static void arrange_children(enum sway_container_layout layout, list_t *children
 		}
 	} else if (layout == L_VERT) {
 		int off = 0;
+		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;
 
 			wlr_scene_node_set_enabled(&child->border.tree->node, true);
 			wlr_scene_node_set_position(&child->scene_tree->node, 0, off);
 			wlr_scene_node_reparent(&child->scene_tree->node, content);
-			arrange_container(child, width, cheight, true, gaps);
+			arrange_container(child, width, cheight, show_titlebar, gaps);
 			off += cheight + gaps;
 		}
 	} else if (layout == L_HORIZ) {
 		int off = 0;
+		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;
 
 			wlr_scene_node_set_enabled(&child->border.tree->node, true);
 			wlr_scene_node_set_position(&child->scene_tree->node, off, 0);
 			wlr_scene_node_reparent(&child->scene_tree->node, content);
-			arrange_container(child, cwidth, height, true, gaps);
+			arrange_container(child, cwidth, height, show_titlebar, gaps);
 			off += cwidth + gaps;
 		}
 	} else {
@@ -452,7 +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);
 	}
 }
 
@@ -532,7 +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) {

sway/sway.5.scd

@@ -747,10 +747,11 @@ 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 | --smart-titles] 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 --smart-titles option
+	hide the title bar on workspaces with only 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

@@ -356,8 +356,14 @@ void view_autoconfigure(struct sway_view *view) {
 			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()
+			int titlebar_height;
+			if (config->hide_lone_title && view_is_only_visible(view)) {
+				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;