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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>
*/
#ifndef INDICATOR_DATETIME_CLOCK_H
#define INDICATOR_DATETIME_CLOCK_H
#include <datetime/timezones.h>
#include <core/property.h>
#include <core/signal.h>
#include <glib.h>
#include <gio/gio.h>
#include <set>
#include <string>
namespace unity {
namespace indicator {
namespace datetime {
/**
* \brief A clock.
*
* Provides a signal to notify when clock skew is detected, such as
* when the timezone changes or when the system resumes from sleep.
*/
class Clock
{
public:
virtual ~Clock();
virtual GDateTime* localtime() const = 0;
core::Property<std::set<std::string> > timezones;
core::Signal<> skewDetected;
protected:
Clock();
private:
static void onSystemBusReady(GObject*, GAsyncResult*, gpointer);
static void onPrepareForSleep(GDBusConnection*, const gchar*, const gchar*, const gchar*, const gchar*, GVariant*, gpointer);
Clock(const Clock&) =delete;
Clock& operator=(const Clock&) =delete;
GCancellable * cancellable_ = nullptr;
GDBusConnection * system_bus_ = nullptr;
unsigned int sleep_subscription_id_ = 0;
};
/***
****
***/
/**
* \brief A live clock that provides the actual system time.
*
* Adds another clock skew detection test: wakes up every
* skewTestIntervalSec seconds to see how much time has passed
* since the last time it checked.
*/
class LiveClock: public Clock
{
public:
LiveClock (const std::shared_ptr<Timezones>& zones);
virtual ~LiveClock();
virtual GDateTime* localtime() const;
core::Property<unsigned int> skewTestIntervalSec;
private:
class Impl;
std::unique_ptr<Impl> p;
};
/***
****
***/
} // namespace datetime
} // namespace indicator
} // namespace unity
#endif // INDICATOR_DATETIME_CLOCK_H
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