Add setting "show_bar_per_unit"

src/settings.c

@@ -21,6 +21,7 @@ static int gap_size = 10;
 static int max_clients_in_master = 0; // 0 for no maximum
 static bool respect_resize_hints_in_floating_layout = false;
 static bool show_bar_by_default = true;
+static bool show_bar_per_unit = UNIT_MONITOR;
 static unsigned int snap_distance = 32;
 static bool status_on_all_monitors = false;
 static bool swallow_floating = false;
@@ -140,6 +141,17 @@ void settings_set_show_bar_by_default(bool new_show_bar_by_default)
 	show_bar_by_default = new_show_bar_by_default;
 }
 
+UnitKind settings_get_show_bar_per_unit()
+{
+	return show_bar_per_unit;
+}
+
+void settings_set_show_bar_per_unit(const UnitKind new_show_bar_per_unit)
+{
+	show_bar_per_unit = new_show_bar_per_unit;
+	// TODO: notify WM to rearrange clients
+}
+
 unsigned int settings_get_snap_distance()
 {
 	return snap_distance;

src/settings.h

@@ -1,6 +1,8 @@
 #ifndef _SETTINGS_H
 #define _SETTINGS_H
 
+#include "unit.h"
+
 #include <stdbool.h>
 
 typedef enum {
@@ -40,6 +42,9 @@ void settings_set_respect_resize_hints_in_floating_layout(bool new_respect_resiz
 bool settings_get_show_bar_by_default();
 void settings_set_show_bar_by_default(bool new_show_bar_by_default);
 
+UnitKind settings_get_show_bar_per_unit();
+void     settings_set_show_bar_per_unit(UnitKind new_show_bar_per_unit);
+
 unsigned int settings_get_snap_distance();
 void         settings_set_snap_distance(unsigned int new_snap_distance);
 

src/unit.c

@@ -7,7 +7,7 @@
 
 struct Unit {
 	UnitKind kind;
-	const struct Unit *parent;
+	struct Unit *parent;
 	bool show_bar;
 };
 
@@ -49,10 +49,28 @@ void unit_delete(const Unit unit)
 
 bool unit_get_show_bar(const Unit unit)
 {
+	const UnitKind show_bar_per_unit = settings_get_show_bar_per_unit();
+
+	if (unit->kind == show_bar_per_unit) {
 		return unit->show_bar;
+	} else if (unit->kind > show_bar_per_unit) {
+		return unit_get_show_bar(unit->parent);
+	} else {
+		// TODO: maybe we should assert here
+		return settings_get_show_bar_by_default();
+	}
 }
 
 bool unit_toggle_show_bar(const Unit unit)
 {
+	const UnitKind show_bar_per_unit = settings_get_show_bar_per_unit();
+
+	if (unit->kind == show_bar_per_unit) {
 		return unit->show_bar = !unit->show_bar;
+	} else if (unit->kind > show_bar_per_unit) {
+		return unit_toggle_show_bar(unit->parent);
+	} else {
+		// TODO: maybe we should assert here
+		return settings_get_show_bar_by_default();
+	}
 }