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/*
* Copyright 2013 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3, as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY, 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/>.
*
* Authors:
* Charles Kerr <charles.kerr@canonical.com>
*/
#include <datetime/dbus-shared.h>
#include <datetime/timezone-timedated.h>
#include <gio/gio.h>
#include <cerrno>
#include <cstdlib>
namespace ayatana {
namespace indicator {
namespace datetime {
/***
****
***/
class TimedatedTimezone::Impl
{
public:
Impl(TimedatedTimezone& owner):
m_owner{owner},
m_cancellable{g_cancellable_new()}
{
// set the fallback value
m_owner.timezone.set("Etc/Utc");
// watch for timedate1 on the bus
m_watcher_id = g_bus_watch_name(
G_BUS_TYPE_SYSTEM,
Bus::Timedate1::BUSNAME,
G_BUS_NAME_WATCHER_FLAGS_AUTO_START,
on_timedate1_appeared,
on_timedate1_vanished,
this,
nullptr);
}
~Impl()
{
g_cancellable_cancel(m_cancellable);
g_clear_object(&m_cancellable);
g_bus_unwatch_name(m_watcher_id);
if (m_connection != nullptr)
{
if (m_signal_subscription_id)
g_dbus_connection_signal_unsubscribe(m_connection, m_signal_subscription_id);
g_clear_object(&m_connection);
}
}
private:
static void on_timedate1_appeared(GDBusConnection * connection,
const gchar * /*name*/,
const gchar * /*name_owner*/,
gpointer gself)
{
static_cast<Impl*>(gself)->timedate1_appeared(connection);
}
void timedate1_appeared(GDBusConnection* connection)
{
// cache m_connection for later...
g_clear_object(&m_connection);
m_connection = G_DBUS_CONNECTION(g_object_ref(G_OBJECT(connection)));
ensure_propchange_subscription();
ask_for_timezone();
}
void ensure_propchange_subscription()
{
if (m_signal_subscription_id == 0)
{
m_signal_subscription_id = g_dbus_connection_signal_subscribe(
m_connection,
Bus::Timedate1::IFACE,
Bus::Properties::IFACE,
Bus::Properties::Signals::PROPERTIES_CHANGED,
Bus::Timedate1::ADDR,
nullptr,
G_DBUS_SIGNAL_FLAGS_NONE,
on_properties_changed,
this,
nullptr);
}
}
static void on_timedate1_vanished(GDBusConnection * /*connection*/,
const gchar * name,
gpointer /*gself*/)
{
g_debug("%s not present on system bus", name);
}
static void on_properties_changed(GDBusConnection * /*connection*/,
const gchar * /*sender_name*/,
const gchar * /*object_path*/,
const gchar * /*interface_name*/,
const gchar * /*signal_name*/,
GVariant * parameters,
gpointer gself)
{
auto self = static_cast<Impl*>(gself);
GVariant* changed_properties {};
gchar** invalidated_properties {};
g_variant_get(parameters, "(s@a{sv}^as)", NULL, &changed_properties, &invalidated_properties);
const char* tz {};
if (g_variant_lookup(changed_properties, Bus::Timedate1::Properties::TIMEZONE, "&s", &tz, NULL))
{
if (tz != nullptr)
self->set_timezone(tz);
else
g_warning("%s no timezone found", G_STRLOC);
}
else if (g_strv_contains(invalidated_properties, Bus::Timedate1::Properties::TIMEZONE))
{
self->ask_for_timezone();
}
g_variant_unref(changed_properties);
g_strfreev(invalidated_properties);
}
void ask_for_timezone()
{
g_return_if_fail(m_connection != nullptr);
g_dbus_connection_call(
m_connection,
Bus::Timedate1::BUSNAME,
Bus::Timedate1::ADDR,
Bus::Properties::IFACE,
Bus::Properties::Methods::GET,
g_variant_new("(ss)", Bus::Timedate1::IFACE, Bus::Timedate1::Properties::TIMEZONE),
G_VARIANT_TYPE("(v)"),
G_DBUS_CALL_FLAGS_NONE,
-1,
m_cancellable,
on_get_timezone_ready,
this);
}
static void on_get_timezone_ready(GObject * connection,
GAsyncResult * res,
gpointer gself)
{
GError* error {};
GVariant* v = g_dbus_connection_call_finish(G_DBUS_CONNECTION(connection), res, &error);
if (error != nullptr)
{
if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
g_warning("%s Couldn't get timezone: %s", G_STRLOC, error->message);
}
else if (v != nullptr)
{
GVariant* tzv {};
g_variant_get(v, "(v)", &tzv);
const char* tz = g_variant_get_string(tzv, nullptr);
if (tz != nullptr)
static_cast<Impl*>(gself)->set_timezone(tz);
else
g_warning("%s no timezone found", G_STRLOC);
g_clear_pointer(&tzv, g_variant_unref);
g_clear_pointer(&v, g_variant_unref);
}
}
void set_timezone(const std::string& tz)
{
g_return_if_fail(!tz.empty());
g_debug("set timezone: '%s'", tz.c_str());
m_owner.timezone.set(tz);
}
/***
****
***/
TimedatedTimezone& m_owner;
GCancellable* m_cancellable {};
GDBusConnection* m_connection {};
unsigned long m_signal_subscription_id {};
unsigned int m_watcher_id {};
};
/***
****
***/
TimedatedTimezone::TimedatedTimezone():
impl{new Impl{*this}}
{
}
TimedatedTimezone::~TimedatedTimezone()
{
}
/***
****
***/
} // namespace datetime
} // namespace indicator
} // namespace ayatana
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