gala/daemon/Main.vala

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Vala
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//
// Copyright (c) 2018 elementary LLC. (https://elementary.io)
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//
namespace Gala {
[DBus (name = "org.gnome.SessionManager")]
public interface SessionManager : Object {
public abstract async ObjectPath register_client (
string app_id,
string client_start_id
) throws DBusError, IOError;
}
[DBus (name = "org.gnome.SessionManager.ClientPrivate")]
public interface SessionClient : Object {
public abstract void end_session_response (bool is_ok, string reason) throws DBusError, IOError;
public signal void stop () ;
public signal void query_end_session (uint flags);
public signal void end_session (uint flags);
public signal void cancel_end_session ();
}
public class Daemon {
SessionClient? sclient = null;
public Daemon () {
register.begin ((o, res)=> {
bool success = register.end (res);
if (!success) {
message ("Failed to register with Session manager");
}
});
var granite_settings = Granite.Settings.get_default ();
var gtk_settings = Gtk.Settings.get_default ();
gtk_settings.gtk_application_prefer_dark_theme = granite_settings.prefers_color_scheme == Granite.Settings.ColorScheme.DARK;
granite_settings.notify["prefers-color-scheme"].connect (() => {
gtk_settings.gtk_application_prefer_dark_theme = granite_settings.prefers_color_scheme == Granite.Settings.ColorScheme.DARK;
});
var menu_daemon = new MenuDaemon ();
menu_daemon.setup_dbus ();
}
public void run () {
Gtk.main ();
}
public static async SessionClient? register_with_session (string app_id) {
ObjectPath? path = null;
string? msg = null;
string? start_id = null;
SessionManager? session = null;
SessionClient? session_client = null;
start_id = Environment.get_variable ("DESKTOP_AUTOSTART_ID");
if (start_id != null) {
Environment.unset_variable ("DESKTOP_AUTOSTART_ID");
} else {
start_id = "";
warning (
"DESKTOP_AUTOSTART_ID not set, session registration may be broken (not running via session?)"
);
}
try {
session = yield Bus.get_proxy (
BusType.SESSION,
"org.gnome.SessionManager",
"/org/gnome/SessionManager"
);
} catch (Error e) {
warning ("Unable to connect to session manager: %s", e.message);
return null;
}
try {
path = yield session.register_client (app_id, start_id);
} catch (Error e) {
msg = e.message;
warning ("Error registering with session manager: %s", e.message);
return null;
}
try {
session_client = yield Bus.get_proxy (BusType.SESSION, "org.gnome.SessionManager", path);
} catch (Error e) {
warning ("Unable to get private sessions client proxy: %s", e.message);
return null;
}
return session_client;
}
async bool register () {
sclient = yield register_with_session ("org.pantheon.gala.daemon");
sclient.query_end_session.connect (() => end_session (false));
sclient.end_session.connect (() => end_session (false));
sclient.stop.connect (() => end_session (true));
return true;
}
void end_session (bool quit) {
if (quit) {
Gtk.main_quit ();
return;
}
try {
sclient.end_session_response (true, "");
} catch (Error e) {
warning ("Unable to respond to session manager: %s", e.message);
}
}
}
public static int main (string[] args) {
Gtk.init (ref args);
var ctx = new OptionContext ("Gala Daemon");
ctx.set_help_enabled (true);
ctx.add_group (Gtk.get_option_group (false));
try {
ctx.parse (ref args);
} catch (Error e) {
stderr.printf ("Error: %s\n", e.message);
return 0;
}
var daemon = new Daemon ();
daemon.run ();
return 0;
}
}