Add support for Pantheon Wayland session

README.md

@@ -1,5 +1,7 @@
 # Current status: Stable Beta (Please Read)
 
+**2024-11-28 UPDATE**: Added support for Pantheon's Wayland session (elementary OS desktop environment). 
+
 **2024-10-03 UPDATE**: Fixed the broken COSMIC desktop environment support to work with COSMIC Alpha 2 or later (unless they change the relevant Wayland protocol again). 
 
 **2024-07-28 UPDATE**: Some basic `wlroots` based Wayland compositor support has been added. See the [Wiki article](https://github.com/RedBearAK/toshy/wiki/Wlroots-Based-Wayland-Compositors).
@@ -357,6 +359,7 @@ You will find these distro groupings in the Wiki article:
     - **Hyprland** - _[currently uses `hyprpy` Python module]_
     - **MiracleWM** - _[via `wlroots` method]_
     - **Niri** - _[via `wlroots` method]_
+    - **Pantheon** - [via D-Bus queries to Gala WM]
     - **Plasma 5 (KDE)** - _[uses custom KWin script and D-Bus service]_
     - **Plasma 6 (KDE)** - _[uses custom KWin script and D-Bus service]_
     - **Qtile** - _[via `wlroots` method]_

lib/env_context.py

@@ -567,6 +567,7 @@ def get_window_manager(self):
             'i3-gaps':          'i3',
             'miracle-wm':       'miracle-wm',
             'openbox':          'openbox',
+            'pantheon':         'gala',
             'sway':             'sway',
             'xfce':             'xfwm4',
 

wlroots-dev/pantheon_dbus_signal_monitor.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+
+# Works, but the signals are not useful for tracking the active app class and window title. 
+
+
+from gi.repository import GLib
+import dbus
+import dbus.mainloop.glib
+
+class GalaMonitor:
+    def __init__(self):
+        self.bus = None
+        self.gala_interface = None
+
+    def connect_to_gala(self):
+        try:
+            # Ensure the main loop is set before creating the session bus
+            dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
+            self.bus = dbus.SessionBus()
+            self.gala_interface = self.bus.get_object(
+                "org.pantheon.gala",
+                "/org/pantheon/gala/DesktopInterface"
+            )
+            print("Connected to Gala D-Bus interface.")
+        except Exception as e:
+            print(f"Failed to connect to Gala interface: {e}")
+            return False
+        return True
+
+    def on_windows_changed(self, *args):
+        print("WindowsChanged signal received.")
+
+    def on_running_apps_changed(self, *args):
+        print("RunningApplicationsChanged signal received.")
+
+    def subscribe_signals(self):
+        try:
+            self.bus.add_signal_receiver(
+                self.on_windows_changed,
+                signal_name="WindowsChanged",
+                dbus_interface="org.pantheon.gala.DesktopIntegration",
+                path="/org/pantheon/gala/DesktopInterface"
+            )
+
+            self.bus.add_signal_receiver(
+                self.on_running_apps_changed,
+                signal_name="RunningApplicationsChanged",
+                dbus_interface="org.pantheon.gala.DesktopIntegration",
+                path="/org/pantheon/gala/DesktopInterface"
+            )
+
+            print("Subscribed to WindowsChanged and RunningApplicationsChanged signals.")
+        except Exception as e:
+            print(f"Failed to subscribe to signals: {e}")
+
+    def run(self):
+        if not self.connect_to_gala():
+            return
+        self.subscribe_signals()
+        loop = GLib.MainLoop()
+        print("Listening for signals... Press Ctrl+C to exit.")
+        try:
+            loop.run()
+        except KeyboardInterrupt:
+            print("Exiting...")
+
+if __name__ == "__main__":
+    monitor = GalaMonitor()
+    monitor.run()