From 3faf1caeadc73b41ec1c04670f9e07da66e43e8c Mon Sep 17 00:00:00 2001
From: Julian Sparber <julian@sparber.net>
Date: Tue, 30 Jan 2024 18:04:36 +0100
Subject: [PATCH] messageTray: Introduce singleton Source for system
 notifications

This `Source` object should be used by all notifications created by
GNOME Shell and eventually can also be used by extensions.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3156>
---
 js/ui/messageTray.js | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 479044a3a..a069f16d4 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1326,6 +1326,29 @@ export const MessageTray = GObject.registerClass({
     }
 });
 
+let systemNotificationSource = null;
+
+/**
+ * The {Source} that should be used to send system notifications.
+ *
+ * @returns {Source}
+ */
+export function getSystemSource() {
+    if (!systemNotificationSource) {
+        systemNotificationSource = new Source({
+            title: _('System'),
+            iconName: 'emblem-system-symbolic',
+        });
+
+        systemNotificationSource.connect('destroy', () => {
+            systemNotificationSource = null;
+        });
+        Main.messageTray.add(systemNotificationSource);
+    }
+
+    return systemNotificationSource;
+}
+
 export const SystemNotificationSource = GObject.registerClass(
 class SystemNotificationSource extends Source {
     constructor() {