Focus window when it demands attention (#2041)

src/WindowAttentionTracker.vala

@@ -0,0 +1,16 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-FileCopyrightText: 2024 elementary, Inc. (https://elementary.io)
+ */
+
+public class Gala.WindowAttentionTracker : GLib.Object {
+    public static void init (Meta.Display display) {
+        display.window_demands_attention.connect (on_window_demands_attention);
+        display.window_marked_urgent.connect (on_window_demands_attention);
+    }
+
+    private static void on_window_demands_attention (Meta.Window window) {
+        window.raise ();
+        window.get_workspace ().activate_with_focus (window, window.display.get_current_time ());
+    }
+}

src/WindowManager.vala

@@ -174,6 +174,7 @@ namespace Gala {
             window_tracker = new WindowTracker ();
             WindowStateSaver.init (window_tracker);
             window_tracker.init (display);
+            WindowAttentionTracker.init (display);
 
             notification_stack = new NotificationStack (display);
 

src/meson.build

@@ -14,6 +14,7 @@ gala_bin_sources = files(
     'ScreenSaverManager.vala',
     'ScreenshotManager.vala',
     'SessionManager.vala',
+    'WindowAttentionTracker.vala',
     'WindowGrabTracker.vala',
     'WindowListener.vala',
     'WindowManager.vala',