clubhouse: Request background permission

https://phabricator.endlessm.com/T31116

eosclubhouse/clubhouse.py

@@ -49,6 +49,7 @@
 from eosclubhouse.animation import Animation, AnimationImage, AnimationSystem, Animator, \
     get_character_animation_dirs
 from eosclubhouse import metrics
+from eosclubhouse.portal import Portal
 
 from eosclubhouse.widgets import FixedLayerGroup, ScalableImage, gtk_widget_add_custom_css_provider
 
@@ -3082,6 +3083,7 @@ def __init__(self):
         super().__init__(application_id=CLUBHOUSE_NAME,
                          inactivity_timeout=self._INACTIVITY_TIMEOUT,
                          resource_base_path='/com/hack_computer/Clubhouse')
+        Portal.request_background()
 
         self._installing_extension = False
         self._use_inapp_notifications = False

eosclubhouse/portal.py

@@ -0,0 +1,52 @@
+# Copyright (C) 2020 Endless OS Foundation LLC.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+import logging
+
+from gi.repository import Gio, GLib
+
+
+_logger = logging.getLogger(__name__)
+
+
+class Portal:
+    _proxy = None
+
+    @classmethod
+    def _get_proxy(klass):
+        if klass._proxy is None:
+            klass._proxy = Gio.DBusProxy.new_for_bus_sync(
+                Gio.BusType.SESSION,
+                0,
+                None,
+                'org.freedesktop.portal.Desktop',
+                '/org/freedesktop/portal/desktop',
+                'org.freedesktop.portal.Background',
+                None
+            )
+        return klass._proxy
+
+    @classmethod
+    def request_background(klass, message=''):
+        try:
+            proxy = klass._get_proxy()
+            options = {}
+            if message:
+                options['reason'] = GLib.Variant('s', message)
+            proxy.RequestBackground('(sa{sv})', '', options)
+        except GLib.Error as err:
+            _logger.warning('Error requesting background permission to portal: %s', err)