Python script, ASCII text executable
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#!/usr/bin/env python3
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"""
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D-Bus app indicator/system tray for the Panorama panel.
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Copyright 2025, roundabout-host.com <vlad@roundabout-host.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public Licence as published by
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the Free Software Foundation, either version 3 of the Licence, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public Licence for more details.
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You should have received a copy of the GNU General Public Licence
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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from __future__ import annotations
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import os
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import traceback
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import uuid
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import locale
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from pathlib import Path
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import gi
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from ctypes import CDLL
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CDLL("libdbusmenu-glib.so")
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gi.require_version("Dbusmenu", "0.4")
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import panorama_panel
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from gi.repository import Gtk, GLib, Gio
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from . import dbusmenu
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module_directory = Path(__file__).resolve().parent
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locale.bindtextdomain("panorama-indicator-applet", module_directory / "locale")
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_ = lambda x: locale.dgettext("panorama-indicator-applet", x)
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class StatusNotifierService:
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"""
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<node>
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<interface name="org.kde.StatusNotifierHost">
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</interface>
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</node>
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"""
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def __init__(self, applet: IndicatorApplet):
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self.applet = applet
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self.xml = """
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<node>
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<interface name="org.kde.StatusNotifierHost">
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</interface>
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</node>
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"""
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self.node_info = Gio.DBusNodeInfo.new_for_xml(self.xml)
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self.iface_info = self.node_info.interfaces[0]
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def export(self, connection: Gio.DBusConnection):
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connection.register_object(
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"/StatusNotifierHost",
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self.iface_info,
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self.handle_method_call,
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None,
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None,
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)
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def handle_method_call(self, conn, sender, obj_path, iface_name, method, params, invocation):
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# It has no methods
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invocation.return_value(None)
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class StatusIcon(Gtk.MenuButton):
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def __init__(self, applet: IndicatorApplet, service: str):
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super().__init__()
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self.applet = applet
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self.service = service
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label = Gtk.Label(label=service)
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self.set_child(label)
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print(self.service)
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self.popover_menu = Gtk.PopoverMenu(flags=Gtk.PopoverMenuFlags.NESTED)
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self.set_popover(self.popover_menu)
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connection, _0, path = self.service.rpartition(":")
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self.menu = None
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try:
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proxy = Gio.DBusProxy.new_sync(
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self.applet.connection,
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Gio.DBusProxyFlags.NONE,
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None,
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connection,
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path,
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"org.kde.StatusNotifierItem",
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None
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)
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self.applet.item_id += 1
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icon_name = proxy.get_cached_property("IconName")
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if icon_name:
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icon_name = icon_name.unpack()
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self.icon = Gtk.Image.new_from_icon_name(icon_name)
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self.set_child(self.icon)
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menu = proxy.get_cached_property("Menu")
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if menu:
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self.menu = dbusmenu.CanonicalMenuModel()
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self.menu.connect_dbus(connection, menu.get_string(), f"ac{self.applet.item_id}")
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self.insert_action_group(f"ac{self.applet.item_id}", self.menu.actions)
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self.popover_menu.set_menu_model(self.menu.menu)
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except Exception as e:
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print(f"Could not get properties from {service}: {e}")
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traceback.print_exc()
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class IndicatorApplet(panorama_panel.Applet):
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name = _("Indicators")
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description = _("Show application status icons")
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def __init__(self, orientation=Gtk.Orientation.HORIZONTAL, config=None):
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super().__init__(orientation=orientation, config=config or {})
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self.items = {}
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self.item_id = 0
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self.connection = Gio.bus_get_sync(Gio.BusType.SESSION)
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# Make the host name unique
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self.bus_name = f"org.kde.StatusNotifierHost-{os.getpid()}-pan-{uuid.uuid4()}"
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self.service = StatusNotifierService(self)
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self.service.export(self.connection)
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Gio.bus_own_name(
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Gio.BusType.SESSION,
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self.bus_name,
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Gio.BusNameOwnerFlags.NONE,
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None,
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None,
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None,
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)
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try:
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self.watcher = Gio.DBusProxy.new_sync(
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self.connection,
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Gio.DBusProxyFlags.NONE,
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None,
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"org.kde.StatusNotifierWatcher",
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"/StatusNotifierWatcher",
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"org.kde.StatusNotifierWatcher",
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None,
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)
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except Exception as e:
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print("Could not connect to StatusNotifierWatcher:", e)
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self.watcher = None
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if self.watcher:
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try:
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self.watcher.call_sync(
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"RegisterStatusNotifierHost",
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GLib.Variant("(s)", (self.bus_name,)),
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Gio.DBusCallFlags.NONE,
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-1,
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None,
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)
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except Exception as e:
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print("Failed to register host:", e)
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# Watch for new items
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self.connection.signal_subscribe(
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None,
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"org.kde.StatusNotifierWatcher",
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"StatusNotifierItemRegistered",
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"/StatusNotifierWatcher",
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None,
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Gio.DBusSignalFlags.NONE,
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self.on_item_registered_signal,
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)
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# Watch for vanishing items
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self.connection.signal_subscribe(
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None,
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"org.kde.StatusNotifierWatcher",
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"StatusNotifierItemUnregistered",
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"/StatusNotifierWatcher",
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None,
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Gio.DBusSignalFlags.NONE,
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self.on_item_unregistered_signal,
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)
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# TODO: watch for things such as icon changes.
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def on_item_registered_signal(self, conn, sender_name, obj_path, iface_name, signal_name, params):
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(service,) = params.unpack()
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self.on_item_registered(service)
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def on_item_unregistered_signal(self, conn, sender_name, obj_path, iface_name, signal_name, params):
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(service,) = params.unpack()
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self.on_item_unregistered(service)
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def on_item_registered(self, service):
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icon = StatusIcon(self, service)
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self.append(icon)
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self.items[service] = icon
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def on_item_unregistered(self, service):
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if service in self.items:
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self.remove(self.items[service])
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del self.items[service]
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