Move func "settings_(get|set)_max_clients_in_master" to Rust

src/api/constraints.rs

@@ -9,13 +9,6 @@ extern "C" fn constraints_master_area_factor(
     constraints::master_area_factor(master_area_factor)
 }
 
-#[no_mangle]
-extern "C" fn constraints_max_clients_in_master(
-    max_clients_in_master: c_int,
-) -> c_int {
-    constraints::max_clients_in_master(max_clients_in_master)
-}
-
 #[no_mangle]
 extern "C" fn constraints_snap_distance(snap_distance: c_uint) -> c_uint {
     constraints::snap_distance(snap_distance)

src/api/settings.rs

@@ -80,3 +80,20 @@ unsafe extern "C" fn settings_get_gap_size() -> c_int {
 unsafe extern "C" fn settings_set_gap_size(value: c_int) {
     SETTINGS.unwrap().gap_size_set(value);
 }
+
+#[no_mangle]
+unsafe extern "C" fn settings_get_max_clients_in_master() -> c_int {
+    match SETTINGS.unwrap().max_clients_in_master() {
+        None => 0,
+        Some(value) => value,
+    }
+}
+
+#[no_mangle]
+unsafe extern "C" fn settings_set_max_clients_in_master(value: c_int) {
+    SETTINGS.unwrap().max_clients_in_master_set(if value == 0 {
+        None
+    } else {
+        Some(value)
+    });
+}

src/constraints.h

@@ -2,7 +2,6 @@
 #define _CONSTRAINTS_H
 
 float constraints_master_area_factor(float master_area_factor);
-int constraints_max_clients_in_master(int max_clients_in_master);
 unsigned int constraints_snap_distance(unsigned int snap_distance);
 
 #endif // _CONSTRAINTS_H

src/settings.c

@@ -5,7 +5,6 @@
 static SettingsForSingleWindow border_for_single_window = SETTINGS_FOR_SINGLE_WINDOW_NOBODY_IS_FULLSCREEN;
 static SettingsForSingleWindow gap_for_single_window = SETTINGS_FOR_SINGLE_WINDOW_NOBODY_IS_FULLSCREEN;
 static UnitKind master_area_factor_per_unit = UNIT_MONITOR;
-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 UnitKind show_bar_per_unit = UNIT_MONITOR;
@@ -45,17 +44,6 @@ void settings_set_master_area_factor_per_unit(const UnitKind new_master_area_fac
 	// TODO: notify WM to rearrange clients
 }
 
-int settings_get_max_clients_in_master()
-{
-	return max_clients_in_master;
-}
-
-void settings_set_max_clients_in_master(const int new_max_clients_in_master)
-{
-	max_clients_in_master = constraints_max_clients_in_master(new_max_clients_in_master);
-	// TODO: notify WM to rearrange clients
-}
-
 bool settings_get_respect_resize_hints_in_floating_layout()
 {
 	return respect_resize_hints_in_floating_layout;

src/settings.rs

@@ -11,6 +11,7 @@ pub struct Settings {
     enable_swallowing: bool,
     focus_on_wheel: bool,
     gap_size: c_int,
+    max_clients_in_master: Option<c_int>,
 }
 
 impl Default for Settings {
@@ -23,6 +24,7 @@ impl Default for Settings {
             enable_swallowing: true,
             focus_on_wheel: true,
             gap_size: 10,
+            max_clients_in_master: None,
         }
     }
 }
@@ -87,4 +89,14 @@ impl Settings {
     pub fn gap_size_set(&mut self, value: c_int) {
         self.gap_size = constraints::gap_size(value);
     }
+
+    pub fn max_clients_in_master(&self) -> Option<c_int> {
+        self.max_clients_in_master
+    }
+
+    // TODO: notify WM to rearrange clients
+    pub fn max_clients_in_master_set(&mut self, value: Option<c_int>) {
+        self.max_clients_in_master =
+            value.map(|value| constraints::max_clients_in_master(value));
+    }
 }