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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_CHROMEOS_CROS_SYSTEM_LIBRARY_H_
#define CHROME_BROWSER_CHROMEOS_CROS_SYSTEM_LIBRARY_H_
#pragma once
#include "base/observer_list.h"
#include "base/singleton.h"
#include "cros/chromeos_system.h"
#include "unicode/timezone.h"
namespace chromeos {
// This interface defines interaction with the ChromeOS system APIs.
class SystemLibrary {
public:
class Observer {
public:
// Called when the timezone has changed. |timezone| is non-null.
virtual void TimezoneChanged(const icu::TimeZone& timezone) = 0;
};
virtual ~SystemLibrary() {}
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
// Returns the current timezone as an icu::Timezone object.
virtual const icu::TimeZone& GetTimezone() = 0;
// Sets the current timezone. |timezone| must be non-null.
virtual void SetTimezone(const icu::TimeZone* timezone) = 0;
// Retrieve the named machine statistic (e.g. "hardware_class").
// This does not update the statistcs (i.e. does not call into libcros).
virtual bool GetMachineStatistic(const std::string& name,
std::string* result) = 0;
// Factory function, creates a new instance and returns ownership.
// For normal usage, access the singleton via CrosLibrary::Get().
static SystemLibrary* GetImpl(bool stub);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_CROS_SYSTEM_LIBRARY_H_
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