From 4576a5080c51918907c89629cefe389945179d71 Mon Sep 17 00:00:00 2001
From: Kristóf Marussy <kristof@marussy.com>
Date: Sun, 17 May 2020 15:17:07 +0200
Subject: Make Tray icons more robust on Linux (#748)

---
 src/lib/DBus.js | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 src/lib/DBus.js

(limited to 'src/lib/DBus.js')

diff --git a/src/lib/DBus.js b/src/lib/DBus.js
new file mode 100644
index 000000000..957912efa
--- /dev/null
+++ b/src/lib/DBus.js
@@ -0,0 +1,49 @@
+import {
+  sessionBus,
+} from 'dbus-next';
+import {
+  isLinux,
+} from '../environment';
+
+export default class DBus {
+  bus = null;
+
+  constructor(trayIcon) {
+    this.trayIcon = trayIcon;
+  }
+
+  start() {
+    if (!isLinux || this.bus) return;
+
+    try {
+      this.bus = sessionBus();
+    } catch {
+      // Error connecting to the bus.
+      return;
+    }
+
+    // HACK Hook onto the MessageBus to track StatusNotifierWatchers
+    this.bus._addMatch("type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',path='/org/freedesktop/DBus',member='NameOwnerChanged'");
+    const mangled = JSON.stringify({
+      path: '/org/freedesktop/DBus',
+      interface: 'org.freedesktop.DBus',
+      member: 'NameOwnerChanged',
+    });
+    this.bus._signals.on(mangled, (msg) => {
+      const [name, oldOwner, newOwner] = msg.body;
+      if (name === 'org.kde.StatusNotifierWatcher' && oldOwner !== newOwner && newOwner !== '') {
+        // Leave ample time for the StatusNotifierWatcher to be initialized
+        setTimeout(() => {
+          this.trayIcon.recreateIfVisible();
+        }, 400);
+      }
+    });
+  }
+
+  stop() {
+    if (!this.bus) return;
+
+    this.bus.disconnect();
+    this.bus = null;
+  }
+}
-- 
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