/* -*- 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/. */

#include "Hal.h"

#include "HalLog.h"

#include "mozilla/dom/ContentChild.h"

#include "mozilla/dom/ContentParent.h"

#include "mozilla/hal_sandbox/PHalChild.h"

#include "mozilla/hal_sandbox/PHalParent.h"

#include "mozilla/dom/TabParent.h"

#include "mozilla/dom/TabChild.h"

#include "mozilla/fallback/FallbackScreenConfiguration.h"

#include "mozilla/EnumeratedRange.h"

#include "mozilla/Observer.h"

#include "mozilla/Unused.h"

#include "nsAutoPtr.h"

#include "WindowIdentifier.h"

using namespace mozilla;

using namespace mozilla::dom;

using namespace mozilla::hal;

namespace mozilla {

namespace hal_sandbox {

static bool sHalChildDestroyed = false;

bool

HalChildDestroyed()

{

  return sHalChildDestroyed;

}

static PHalChild* sHal;

static PHalChild*

Hal()

{

  if (!sHal) {

    sHal = ContentChild::GetSingleton()->SendPHalConstructor();

  }

  return sHal;

}

void

Vibrate(const nsTArray<uint32_t>& pattern, const WindowIdentifier &id)

{

  HAL_LOG("Vibrate: Sending to parent process.");

  AutoTArray<uint32_t, 8> p(pattern);

  WindowIdentifier newID(id);

  newID.AppendProcessID();

  Hal()->SendVibrate(p, newID.AsArray(), TabChild::GetFrom(newID.GetWindow()));

}

void

CancelVibrate(const WindowIdentifier &id)

{

  HAL_LOG("CancelVibrate: Sending to parent process.");

  WindowIdentifier newID(id);

  newID.AppendProcessID();

  Hal()->SendCancelVibrate(newID.AsArray(), TabChild::GetFrom(newID.GetWindow()));

}

void

EnableBatteryNotifications()

{

  Hal()->SendEnableBatteryNotifications();

}

void

DisableBatteryNotifications()

{

  Hal()->SendDisableBatteryNotifications();

}

void

GetCurrentBatteryInformation(BatteryInformation* aBatteryInfo)

{

  Hal()->SendGetCurrentBatteryInformation(aBatteryInfo);

}

void

EnableNetworkNotifications()

{

  Hal()->SendEnableNetworkNotifications();

}

void

DisableNetworkNotifications()

{

  Hal()->SendDisableNetworkNotifications();

}

void

GetCurrentNetworkInformation(NetworkInformation* aNetworkInfo)

{

  Hal()->SendGetCurrentNetworkInformation(aNetworkInfo);

}

void

EnableScreenConfigurationNotifications()

{

  Hal()->SendEnableScreenConfigurationNotifications();

}

void

DisableScreenConfigurationNotifications()

{

  Hal()->SendDisableScreenConfigurationNotifications();

}

void

GetCurrentScreenConfiguration(ScreenConfiguration* aScreenConfiguration)

{

  fallback::GetCurrentScreenConfiguration(aScreenConfiguration);

}

bool

LockScreenOrientation(const ScreenOrientation& aOrientation)

{

  bool allowed;

  Hal()->SendLockScreenOrientation(aOrientation, &allowed);

  return allowed;

}

void

UnlockScreenOrientation()

{

  // Don't send this message from both the middleman and recording processes.

  if (!recordreplay::IsMiddleman()) {

    Hal()->SendUnlockScreenOrientation();

  }

}

void

EnableSensorNotifications(SensorType aSensor) {

  Hal()->SendEnableSensorNotifications(aSensor);

}

void

DisableSensorNotifications(SensorType aSensor) {

  Hal()->SendDisableSensorNotifications(aSensor);

}

void

EnableWakeLockNotifications()

{

  Hal()->SendEnableWakeLockNotifications();

}

void

DisableWakeLockNotifications()

{

  Hal()->SendDisableWakeLockNotifications();

}

void

ModifyWakeLock(const nsAString &aTopic,

               WakeLockControl aLockAdjust,

               WakeLockControl aHiddenAdjust,

               uint64_t aProcessID)

{

  MOZ_ASSERT(aProcessID != CONTENT_PROCESS_ID_UNKNOWN);

  Hal()->SendModifyWakeLock(nsString(aTopic), aLockAdjust, aHiddenAdjust, aProcessID);

}

void

GetWakeLockInfo(const nsAString &aTopic, WakeLockInformation *aWakeLockInfo)

{

  Hal()->SendGetWakeLockInfo(nsString(aTopic), aWakeLockInfo);

}

bool

EnableAlarm()

{

  MOZ_CRASH("Alarms can't be programmed from sandboxed contexts.  Yet.");

}

void

DisableAlarm()

{

  MOZ_CRASH("Alarms can't be programmed from sandboxed contexts.  Yet.");

}

bool

SetAlarm(int32_t aSeconds, int32_t aNanoseconds)

{

  MOZ_CRASH("Alarms can't be programmed from sandboxed contexts.  Yet.");

}

void

SetProcessPriority(int aPid, ProcessPriority aPriority)

{

  MOZ_CRASH("Only the main process may set processes' priorities.");

}

bool

SetProcessPrioritySupported()

{

  MOZ_CRASH("Only the main process may call SetProcessPrioritySupported().");

}

class HalParent : public PHalParent

                , public BatteryObserver

                , public NetworkObserver

                , public ISensorObserver

                , public WakeLockObserver

                , public ScreenConfigurationObserver

{

public:

  virtual void

  ActorDestroy(ActorDestroyReason aWhy) override

  {

    // NB: you *must* unconditionally unregister your observer here,

    // if it *may* be registered below.

    hal::UnregisterBatteryObserver(this);

    hal::UnregisterNetworkObserver(this);

    hal::UnregisterScreenConfigurationObserver(this);

    for (auto sensor : MakeEnumeratedRange(NUM_SENSOR_TYPE)) {

      hal::UnregisterSensorObserver(sensor, this);

    }

    hal::UnregisterWakeLockObserver(this);

  }

  virtual mozilla::ipc::IPCResult

  RecvVibrate(InfallibleTArray<unsigned int>&& pattern,

              InfallibleTArray<uint64_t>&& id,

              PBrowserParent *browserParent) override

  {

    // We give all content vibration permission.

    //    TabParent *tabParent = TabParent::GetFrom(browserParent);

    /* xxxkhuey wtf

    nsCOMPtr<nsIDOMWindow> window =

      do_QueryInterface(tabParent->GetBrowserDOMWindow());

    */

    WindowIdentifier newID(id, nullptr);

    hal::Vibrate(pattern, newID);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvCancelVibrate(InfallibleTArray<uint64_t> &&id,

                    PBrowserParent *browserParent) override

  {

    //TabParent *tabParent = TabParent::GetFrom(browserParent);

    /* XXXkhuey wtf

    nsCOMPtr<nsIDOMWindow> window =

      tabParent->GetBrowserDOMWindow();

    */

    WindowIdentifier newID(id, nullptr);

    hal::CancelVibrate(newID);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvEnableBatteryNotifications() override {

    // We give all content battery-status permission.

    hal::RegisterBatteryObserver(this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvDisableBatteryNotifications() override {

    hal::UnregisterBatteryObserver(this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvGetCurrentBatteryInformation(BatteryInformation* aBatteryInfo) override {

    // We give all content battery-status permission.

    hal::GetCurrentBatteryInformation(aBatteryInfo);

    return IPC_OK();

  }

  void Notify(const BatteryInformation& aBatteryInfo) override {

    Unused << SendNotifyBatteryChange(aBatteryInfo);

  }

  virtual mozilla::ipc::IPCResult

  RecvEnableNetworkNotifications() override {

    // We give all content access to this network-status information.

    hal::RegisterNetworkObserver(this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvDisableNetworkNotifications() override {

    hal::UnregisterNetworkObserver(this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvGetCurrentNetworkInformation(NetworkInformation* aNetworkInfo) override {

    hal::GetCurrentNetworkInformation(aNetworkInfo);

    return IPC_OK();

  }

  void Notify(const NetworkInformation& aNetworkInfo) override {

    Unused << SendNotifyNetworkChange(aNetworkInfo);

  }

  virtual mozilla::ipc::IPCResult

  RecvEnableScreenConfigurationNotifications() override {

    // Screen configuration is used to implement CSS and DOM

    // properties, so all content already has access to this.

    hal::RegisterScreenConfigurationObserver(this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvDisableScreenConfigurationNotifications() override {

    hal::UnregisterScreenConfigurationObserver(this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvLockScreenOrientation(const ScreenOrientation& aOrientation, bool* aAllowed) override

  {

    // FIXME/bug 777980: unprivileged content may only lock

    // orientation while fullscreen.  We should check whether the

    // request comes from an actor in a process that might be

    // fullscreen.  We don't have that information currently.

    *aAllowed = hal::LockScreenOrientation(aOrientation);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvUnlockScreenOrientation() override

  {

    hal::UnlockScreenOrientation();

    return IPC_OK();

  }

  void Notify(const ScreenConfiguration& aScreenConfiguration) override {

    Unused << SendNotifyScreenConfigurationChange(aScreenConfiguration);

  }

  virtual mozilla::ipc::IPCResult

  RecvEnableSensorNotifications(const SensorType &aSensor) override {

    // We currently allow any content to register device-sensor

    // listeners.

    hal::RegisterSensorObserver(aSensor, this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvDisableSensorNotifications(const SensorType &aSensor) override {

    hal::UnregisterSensorObserver(aSensor, this);

    return IPC_OK();

  }

  void Notify(const SensorData& aSensorData) override {

    Unused << SendNotifySensorChange(aSensorData);

  }

  virtual mozilla::ipc::IPCResult

  RecvModifyWakeLock(const nsString& aTopic,

                     const WakeLockControl& aLockAdjust,

                     const WakeLockControl& aHiddenAdjust,

                     const uint64_t& aProcessID) override

  {

    MOZ_ASSERT(aProcessID != CONTENT_PROCESS_ID_UNKNOWN);

    // We allow arbitrary content to use wake locks.

    hal::ModifyWakeLock(aTopic, aLockAdjust, aHiddenAdjust, aProcessID);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvEnableWakeLockNotifications() override

  {

    // We allow arbitrary content to use wake locks.

    hal::RegisterWakeLockObserver(this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvDisableWakeLockNotifications() override

  {

    hal::UnregisterWakeLockObserver(this);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvGetWakeLockInfo(const nsString &aTopic, WakeLockInformation *aWakeLockInfo) override

  {

    hal::GetWakeLockInfo(aTopic, aWakeLockInfo);

    return IPC_OK();

  }

  void Notify(const WakeLockInformation& aWakeLockInfo) override

  {

    Unused << SendNotifyWakeLockChange(aWakeLockInfo);

  }

};

class HalChild : public PHalChild {

public:

  virtual void

  ActorDestroy(ActorDestroyReason aWhy) override

  {

    sHalChildDestroyed = true;

  }

  virtual mozilla::ipc::IPCResult

  RecvNotifyBatteryChange(const BatteryInformation& aBatteryInfo) override {

    hal::NotifyBatteryChange(aBatteryInfo);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvNotifySensorChange(const hal::SensorData &aSensorData) override;

  virtual mozilla::ipc::IPCResult

  RecvNotifyNetworkChange(const NetworkInformation& aNetworkInfo) override {

    hal::NotifyNetworkChange(aNetworkInfo);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvNotifyWakeLockChange(const WakeLockInformation& aWakeLockInfo) override {

    hal::NotifyWakeLockChange(aWakeLockInfo);

    return IPC_OK();

  }

  virtual mozilla::ipc::IPCResult

  RecvNotifyScreenConfigurationChange(const ScreenConfiguration& aScreenConfiguration) override {

    hal::NotifyScreenConfigurationChange(aScreenConfiguration);

    return IPC_OK();

  }

};

mozilla::ipc::IPCResult

HalChild::RecvNotifySensorChange(const hal::SensorData &aSensorData) {

  hal::NotifySensorChange(aSensorData);

  return IPC_OK();

}

PHalChild* CreateHalChild() {

  return new HalChild();

}

PHalParent* CreateHalParent() {

  return new HalParent();

}

} // namespace hal_sandbox

} // namespace mozilla