Introduce LockScreenManager

Author: leolost2605

src/LockScreenManager.vala

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2026 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ * Authored by: Leonhard Kargl <leo.kargl@proton.me>
+ */
+
+public class Gala.LockScreenManager : Object {
+    public LockScreen lock_screen { private get; construct; }
+
+    /**
+     * To be set by the session locker in the future when we have an in session lock screen
+     */
+    public bool manually_locked { get; set; default = false; }
+
+    public LockScreenManager (LockScreen lock_screen) {
+        Object (lock_screen: lock_screen);
+    }
+
+    construct {
+        notify["manually-locked"].connect (update_active);
+        update_active ();
+    }
+
+    private void update_active () {
+        var active = manually_locked || SessionSettings.is_greeter ();
+        lock_screen.set_active.begin (active);
+    }
+}

src/WindowManager.vala

@@ -112,6 +112,8 @@ namespace Gala {
 
         private NotificationStack notification_stack;
 
+        private LockScreenManager lock_screen_manager;
+
         private Gee.LinkedList<ModalProxy> modal_stack = new Gee.LinkedList<ModalProxy> ();
 
         private Gee.HashSet<Meta.WindowActor> minimizing = new Gee.HashSet<Meta.WindowActor> ();
@@ -319,6 +321,8 @@ namespace Gala {
             lock_screen.add_constraint (new Clutter.BindConstraint (stage, SIZE, 0));
             ui_group.add_child (lock_screen);
 
+            lock_screen_manager = new LockScreenManager (lock_screen);
+
             modal_group = new ModalGroup (this, ShellClientsManager.get_instance ());
             modal_group.add_constraint (new Clutter.BindConstraint (stage, SIZE, 0));
             ui_group.add_child (modal_group);

src/meson.build

@@ -7,6 +7,7 @@ gala_bin_sources = files(
     'InputMethod.vala',
     'InternalUtils.vala',
     'KeyboardManager.vala',
+    'LockScreenManager.vala',
     'Main.vala',
     'NotificationsManager.vala',
     'NotificationStack.vala',