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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et ft=cpp : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_Hal_h
#define mozilla_Hal_h

#include "mozilla/hal_sandbox/PHal.h"
#include "base/basictypes.h"
#include "mozilla/Types.h"
#include "nsTArray.h"
#include "prlog.h"
#include "mozilla/dom/battery/Types.h"
#include "mozilla/dom/network/Types.h"
#include "mozilla/dom/power/Types.h"
#include "mozilla/hal_sandbox/PHal.h"
#include "mozilla/dom/ScreenOrientation.h"

/*
* Hal.h contains the public Hal API.
*
* By default, this file defines its functions in the hal namespace, but if
* MOZ_HAL_NAMESPACE is defined, we'll define our functions in that namespace.
*
* This is used by HalImpl.h and HalSandbox.h, which define copies of all the
* functions here in the hal_impl and hal_sandbox namespaces.
*/

class nsIDOMWindow;

#ifndef MOZ_HAL_NAMESPACE
# define MOZ_HAL_NAMESPACE hal
# define MOZ_DEFINED_HAL_NAMESPACE 1
#endif

namespace mozilla {

template <class T>
class Observer;

namespace hal {

typedef Observer<ScreenConfiguration> ScreenConfigurationObserver;

class WindowIdentifier;

extern PRLogModuleInfo *sHalLog;
#define HAL_LOG(msg) PR_LOG(mozilla::hal::sHalLog, PR_LOG_DEBUG, msg)

} // namespace hal

namespace MOZ_HAL_NAMESPACE {

/**
* Turn the default vibrator device on/off per the pattern specified
* by |pattern|. Each element in the pattern is the number of
* milliseconds to turn the vibrator on or off. The first element in
* |pattern| is an "on" element, the next is "off", and so on.
*
* If |pattern| is empty, any in-progress vibration is canceled.
*
* Only an active window within an active tab may call Vibrate; calls
* from inactive windows and windows on inactive tabs do nothing.
*
* If you're calling hal::Vibrate from the outside world, pass an
* nsIDOMWindow* in place of the WindowIdentifier parameter.
* The method with WindowIdentifier will be called automatically.
*/
void Vibrate(const nsTArray<uint32>& pattern,
             nsIDOMWindow* aWindow);
void Vibrate(const nsTArray<uint32>& pattern,
             const hal::WindowIdentifier &id);

/**
* Cancel a vibration started by the content window identified by
* WindowIdentifier.
*
* If the window was the last window to start a vibration, the
* cancellation request will go through even if the window is not
* active.
*
* As with hal::Vibrate(), if you're calling hal::CancelVibrate from the outside
* world, pass an nsIDOMWindow*. The method with WindowIdentifier will be called
* automatically.
*/
void CancelVibrate(nsIDOMWindow* aWindow);
void CancelVibrate(const hal::WindowIdentifier &id);

/**
* Inform the battery backend there is a new battery observer.
* @param aBatteryObserver The observer that should be added.
*/
void RegisterBatteryObserver(BatteryObserver* aBatteryObserver);

/**
* Inform the battery backend a battery observer unregistered.
* @param aBatteryObserver The observer that should be removed.
*/
void UnregisterBatteryObserver(BatteryObserver* aBatteryObserver);

/**
* Returns the current battery information.
*/
void GetCurrentBatteryInformation(hal::BatteryInformation* aBatteryInfo);

/**
* Notify of a change in the battery state.
* @param aBatteryInfo The new battery information.
*/
void NotifyBatteryChange(const hal::BatteryInformation& aBatteryInfo);

/**
* Determine whether the device's screen is currently enabled.
*/
bool GetScreenEnabled();

/**
* Enable or disable the device's screen.
*
* Note that it may take a few seconds for the screen to turn on or off.
*/
void SetScreenEnabled(bool enabled);

/**
* Get the brightness of the device's screen's backlight, on a scale from 0
* (very dim) to 1 (full blast).
*
* If the display is currently disabled, this returns the brightness the
* backlight will have when the display is re-enabled.
*/
double GetScreenBrightness();

/**
* Set the brightness of the device's screen's backlight, on a scale from 0
* (very dimm) to 1 (full blast). Values larger than 1 are treated like 1, and
* values smaller than 0 are treated like 0.
*
* Note that we may reduce the resolution of the given brightness value before
* sending it to the screen. Therefore if you call SetScreenBrightness(x)
* followed by GetScreenBrightness(), the value returned by
* GetScreenBrightness() may not be exactly x.
*/
void SetScreenBrightness(double brightness);

/**
* Determine whether the device is allowed to sleep.
*/
bool GetCpuSleepAllowed();

/**
* Set whether the device is allowed to suspend automatically after
* the screen is disabled.
*/
void SetCpuSleepAllowed(bool allowed);

/**
* Set the value of a light to a particular color, with a specific flash pattern.
* light specifices which light. See Hal.idl for the list of constants
* mode specifies user set or based on ambient light sensor
* flash specifies whether or how to flash the light
* flashOnMS and flashOffMS specify the pattern for XXX flash mode
* color specifies the color. If the light doesn't support color, the given color is
* transformed into a brightness, or just an on/off if that is all the light is capable of.
* returns true if successful and false if failed.
*/
bool SetLight(hal::LightType light, const hal::LightConfiguration& aConfig);
/**
* GET the value of a light returning a particular color, with a specific flash pattern.
* returns true if successful and false if failed.
*/
bool GetLight(hal::LightType light, hal::LightConfiguration* aConfig);


/**
* Register an observer for the sensor of given type.
*
* The observer will receive data whenever the data generated by the
* sensor is avaiable.
*/
void RegisterSensorObserver(hal::SensorType aSensor,
                            hal::ISensorObserver *aObserver);

/**
* Unregister an observer for the sensor of given type.
*/
void UnregisterSensorObserver(hal::SensorType aSensor,
                              hal::ISensorObserver *aObserver);

/**
* Post a value generated by a sensor.
*
* This API is internal to hal; clients shouldn't call it directly.
*/
void NotifySensorChange(const hal::SensorData &aSensorData);

/**
* Enable sensor notifications from the backend
*
* This method is only visible from implementation of sensor manager.
* Rest of the system should not try this.
*/
void EnableSensorNotifications(hal::SensorType aSensor);

/**
* Disable sensor notifications from the backend
*
* This method is only visible from implementation of sensor manager.
* Rest of the system should not try this.
*/
void DisableSensorNotifications(hal::SensorType aSensor);


/**
* Inform the network backend there is a new network observer.
* @param aNetworkObserver The observer that should be added.
*/
void RegisterNetworkObserver(NetworkObserver* aNetworkObserver);

/**
* Inform the network backend a network observer unregistered.
* @param aNetworkObserver The observer that should be removed.
*/
void UnregisterNetworkObserver(NetworkObserver* aNetworkObserver);

/**
* Returns the current network information.
*/
void GetCurrentNetworkInformation(hal::NetworkInformation* aNetworkInfo);

/**
* Notify of a change in the network state.
* @param aNetworkInfo The new network information.
*/
void NotifyNetworkChange(const hal::NetworkInformation& aNetworkInfo);

/**
* Adjusting system clock.
* @param aDeltaMilliseconds The difference compared with current system clock.
*/
void AdjustSystemClock(int32_t aDeltaMilliseconds);

/**
* Set timezone
* @param aTimezoneSpec The definition can be found in
* http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
*/
void SetTimezone(const nsCString& aTimezoneSpec);

/**
* Reboot the device.
*/
void Reboot();

/**
* Power off the device.
*/
void PowerOff();

/**
* Enable wake lock notifications from the backend.
*
* This method is only used by WakeLockObserversManager.
*/
void EnableWakeLockNotifications();

/**
* Disable wake lock notifications from the backend.
*
* This method is only used by WakeLockObserversManager.
*/
void DisableWakeLockNotifications();

/**
* Inform the wake lock backend there is a new wake lock observer.
* @param aWakeLockObserver The observer that should be added.
*/
void RegisterWakeLockObserver(WakeLockObserver* aObserver);

/**
* Inform the wake lock backend a wake lock observer unregistered.
* @param aWakeLockObserver The observer that should be removed.
*/
void UnregisterWakeLockObserver(WakeLockObserver* aObserver);

/**
* Adjust the internal wake lock counts.
* @param aTopic lock topic
* @param aLockAdjust to increase or decrease active locks
* @param aHiddenAdjust to increase or decrease hidden locks
*/
void ModifyWakeLock(const nsAString &aTopic,
                    hal::WakeLockControl aLockAdjust,
                    hal::WakeLockControl aHiddenAdjust);

/**
* Query the wake lock numbers of aTopic.
* @param aTopic lock topic
* @param aWakeLockInfo wake lock numbers
*/
void GetWakeLockInfo(const nsAString &aTopic, hal::WakeLockInformation *aWakeLockInfo);

/**
* Notify of a change in the wake lock state.
* @param aWakeLockInfo The new wake lock information.
*/
void NotifyWakeLockChange(const hal::WakeLockInformation& aWakeLockInfo);

/**
* Inform the backend there is a new screen configuration observer.
* @param aScreenConfigurationObserver The observer that should be added.
*/
void RegisterScreenConfigurationObserver(hal::ScreenConfigurationObserver* aScreenConfigurationObserver);

/**
* Inform the backend a screen configuration observer unregistered.
* @param aScreenConfigurationObserver The observer that should be removed.
*/
void UnregisterScreenConfigurationObserver(hal::ScreenConfigurationObserver* aScreenConfigurationObserver);

/**
* Returns the current screen configuration.
*/
void GetCurrentScreenConfiguration(hal::ScreenConfiguration* aScreenConfiguration);

/**
* Notify of a change in the screen configuration.
* @param aScreenConfiguration The new screen orientation.
*/
void NotifyScreenConfigurationChange(const hal::ScreenConfiguration& aScreenConfiguration);

/**
* Lock the screen orientation to the specific orientation.
* @return Whether the lock has been accepted.
*/
bool LockScreenOrientation(const dom::ScreenOrientation& aOrientation);

/**
* Unlock the screen orientation.
*/
void UnlockScreenOrientation();

/**
* Register an observer for the switch of given SwitchDevice.
*
* The observer will receive data whenever the data generated by the
* given switch.
*/
void RegisterSwitchObserver(hal::SwitchDevice aDevice, hal::SwitchObserver *aSwitchObserver);

/**
* Unregister an observer for the switch of given SwitchDevice.
*/
void UnregisterSwitchObserver(hal::SwitchDevice aDevice, hal::SwitchObserver *aSwitchObserver);

/**
* Notify the state of the switch.
*
* This API is internal to hal; clients shouldn't call it directly.
*/
void NotifySwitchChange(const hal::SwitchEvent& aEvent);

/**
* Get current switch information.
*/
hal::SwitchState GetCurrentSwitchState(hal::SwitchDevice aDevice);

} // namespace MOZ_HAL_NAMESPACE
} // namespace mozilla

#ifdef MOZ_DEFINED_HAL_NAMESPACE
# undef MOZ_DEFINED_HAL_NAMESPACE
# undef MOZ_HAL_NAMESPACE
#endif

#endif // mozilla_Hal_h
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