/*
* 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 .
*
* Authors:
* Charles Kerr
*/
#include
#include
#include
#include
namespace unity {
namespace indicator {
namespace datetime {
/***
****
***/
class TimedatedTimezone::Impl
{
public:
Impl(TimedatedTimezone& owner, std::string filename):
m_owner(owner),
m_filename(filename)
{
g_debug("Filename is '%s'", filename.c_str());
monitor_timezone_property();
}
~Impl()
{
clear();
}
private:
void clear()
{
if (m_bus_watch_id)
{
g_bus_unwatch_name (m_bus_watch_id);
m_bus_watch_id = 0;
}
if (m_properties_changed_id)
{
g_signal_handler_disconnect(m_proxy, m_properties_changed_id);
m_properties_changed_id = 0;
}
g_clear_object(&m_proxy);
}
static void on_properties_changed(GDBusProxy *proxy G_GNUC_UNUSED,
GVariant *changed_properties /* a{sv} */,
GStrv invalidated_properties G_GNUC_UNUSED,
gpointer gself)
{
auto self = static_cast(gself);
char *tz;
if (g_variant_lookup(changed_properties, "Timezone", "s", &tz, NULL))
{
g_debug("on_properties_changed: got timezone '%s'", tz);
self->notify_timezone(tz);
g_free (tz);
}
}
static void on_proxy_ready(GObject *object G_GNUC_UNUSED,
GAsyncResult *res,
gpointer gself)
{
auto self = static_cast(gself);
GError *error = nullptr;
self->m_proxy = g_dbus_proxy_new_finish(res, &error);
if (error)
{
g_warning ("Couldn't create proxy to read timezone: %s", error->message);
goto out;
}
/* Read the property */
GVariant *prop;
prop = g_dbus_proxy_get_cached_property(self->m_proxy, "Timezone");
if (!prop || !g_variant_is_of_type(prop, G_VARIANT_TYPE_STRING))
{
g_warning("Couldn't read the Timezone property, defaulting to Etc/Utc");
self->notify_timezone("Etc/Utc");
goto out;
}
const gchar *tz;
tz = g_variant_get_string(prop, nullptr);
self->notify_timezone(tz);
self->m_properties_changed_id = g_signal_connect(self->m_proxy,
"g-properties-changed",
(GCallback) on_properties_changed,
gself);
out:
g_clear_pointer(&error, g_error_free);
g_clear_pointer(&prop, g_variant_unref);
}
static void on_name_appeared(GDBusConnection *connection,
const gchar *name,
const gchar *name_owner G_GNUC_UNUSED,
gpointer gself G_GNUC_UNUSED)
{
g_debug ("timedate1 appeared");
g_dbus_proxy_new(connection,
G_DBUS_PROXY_FLAGS_NONE,
NULL,
name,
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
nullptr,
on_proxy_ready,
gself);
}
static void on_name_vanished(GDBusConnection *connection G_GNUC_UNUSED,
const gchar *name G_GNUC_UNUSED,
gpointer gself)
{
auto self = static_cast(gself);
g_debug ("timedate1 vanished");
g_signal_handler_disconnect(self->m_proxy,
self->m_properties_changed_id);
self->m_properties_changed_id = 0;
g_clear_object(&self->m_proxy);
g_clear_pointer(&self->m_proxy, g_main_loop_unref);
}
void monitor_timezone_property()
{
GError *err = nullptr;
GDBusConnection *conn;
/*
* There is an unlikely race which happens if there is an activation
* and timezone change before our match rule is added.
*/
notify_timezone(get_timezone_from_file(m_filename));
/*
* Make sure the bus is around at least until we add the match rules,
* otherwise things (tests) are sad.
*/
conn = g_bus_get_sync(G_BUS_TYPE_SYSTEM,
nullptr,
&err);
if (err)
{
g_warning("Couldn't get bus connection: '%s'", err->message);
g_error_free(err);
return;
}
m_bus_watch_id = g_bus_watch_name_on_connection(conn,
"org.freedesktop.timedate1",
G_BUS_NAME_WATCHER_FLAGS_NONE,
on_name_appeared,
on_name_vanished,
this,
nullptr);
g_object_unref (conn);
}
void notify_timezone(std::string new_timezone)
{
g_debug("notify_timezone '%s'", new_timezone.c_str());
if (!new_timezone.empty())
m_owner.timezone.set(new_timezone);
}
std::string get_timezone_from_file(const std::string& filename)
{
GError * error;
GIOChannel * io_channel;
std::string ret;
// read through filename line-by-line until we fine a nonempty non-comment line
error = nullptr;
io_channel = g_io_channel_new_file(filename.c_str(), "r", &error);
if (error == nullptr)
{
auto line = g_string_new(nullptr);
while(ret.empty())
{
const auto io_status = g_io_channel_read_line_string(io_channel, line, nullptr, &error);
if ((io_status == G_IO_STATUS_EOF) || (io_status == G_IO_STATUS_ERROR))
break;
if (error != nullptr)
break;
g_strstrip(line->str);
if (!line->len) // skip empty lines
continue;
if (*line->str=='#') // skip comments
continue;
ret = line->str;
}
g_string_free(line, true);
} else
/* Default to UTC */
ret = "Etc/Utc";
if (io_channel != nullptr)
{
g_io_channel_shutdown(io_channel, false, nullptr);
g_io_channel_unref(io_channel);
}
if (error != nullptr)
{
g_warning("%s Unable to read timezone file '%s': %s", G_STRLOC, filename.c_str(), error->message);
g_error_free(error);
}
return ret;
}
/***
****
***/
TimedatedTimezone & m_owner;
unsigned long m_properties_changed_id = 0;
unsigned long m_bus_watch_id = 0;
GDBusProxy *m_proxy = nullptr;
std::string m_filename;
};
/***
****
***/
TimedatedTimezone::TimedatedTimezone(std::string filename):
impl(new Impl{*this, filename})
{
}
TimedatedTimezone::~TimedatedTimezone()
{
}
/***
****
***/
} // namespace datetime
} // namespace indicator
} // namespace unity