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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/. */
#include "Hal.h"
#include "HalImpl.h"
#include "HalSandbox.h"
#include "mozilla/Util.h"
#include "nsThreadUtils.h"
#include "nsXULAppAPI.h"
#include "mozilla/Observer.h"
#include "nsIDOMDocument.h"
#include "nsIDOMWindow.h"
#include "mozilla/Services.h"
#include "nsIWebNavigation.h"
#include "nsITabChild.h"
#include "nsIDocShell.h"
#include "mozilla/ClearOnShutdown.h"
#include "WindowIdentifier.h"
#include "mozilla/dom/ScreenOrientation.h"
using namespace mozilla::services;
#define PROXY_IF_SANDBOXED(_call) \
do { \
if (InSandbox()) { \
hal_sandbox::_call; \
} else { \
hal_impl::_call; \
} \
} while (0)
#define RETURN_PROXY_IF_SANDBOXED(_call) \
do { \
if (InSandbox()) { \
return hal_sandbox::_call; \
} else { \
return hal_impl::_call; \
} \
} while (0)
namespace mozilla {
namespace hal {
PRLogModuleInfo *sHalLog = PR_LOG_DEFINE("hal");
namespace {
void
AssertMainThread()
{
MOZ_ASSERT(NS_IsMainThread());
}
bool
InSandbox()
{
return GeckoProcessType_Content == XRE_GetProcessType();
}
bool
WindowIsActive(nsIDOMWindow *window)
{
NS_ENSURE_TRUE(window, false);
nsCOMPtr<nsIDOMDocument> doc;
window->GetDocument(getter_AddRefs(doc));
NS_ENSURE_TRUE(doc, false);
bool hidden = true;
doc->GetMozHidden(&hidden);
return !hidden;
}
nsAutoPtr<WindowIdentifier::IDArrayType> gLastIDToVibrate;
void InitLastIDToVibrate()
{
gLastIDToVibrate = new WindowIdentifier::IDArrayType();
ClearOnShutdown(&gLastIDToVibrate);
}
} // anonymous namespace
void
Vibrate(const nsTArray<uint32>& pattern, nsIDOMWindow* window)
{
Vibrate(pattern, WindowIdentifier(window));
}
void
Vibrate(const nsTArray<uint32>& pattern, const WindowIdentifier &id)
{
AssertMainThread();
// Only active windows may start vibrations. If |id| hasn't gone
// through the IPC layer -- that is, if our caller is the outside
// world, not hal_proxy -- check whether the window is active. If
// |id| has gone through IPC, don't check the window's visibility;
// only the window corresponding to the bottommost process has its
// visibility state set correctly.
if (!id.HasTraveledThroughIPC() && !WindowIsActive(id.GetWindow())) {
HAL_LOG(("Vibrate: Window is inactive, dropping vibrate."));
return;
}
if (InSandbox()) {
hal_sandbox::Vibrate(pattern, id);
}
else {
if (!gLastIDToVibrate)
InitLastIDToVibrate();
*gLastIDToVibrate = id.AsArray();
HAL_LOG(("Vibrate: Forwarding to hal_impl."));
// hal_impl doesn't need |id|. Send it an empty id, which will
// assert if it's used.
hal_impl::Vibrate(pattern, WindowIdentifier());
}
}
void
CancelVibrate(nsIDOMWindow* window)
{
CancelVibrate(WindowIdentifier(window));
}
void
CancelVibrate(const WindowIdentifier &id)
{
AssertMainThread();
// Although only active windows may start vibrations, a window may
// cancel its own vibration even if it's no longer active.
//
// After a window is marked as inactive, it sends a CancelVibrate
// request. We want this request to cancel a playing vibration
// started by that window, so we certainly don't want to reject the
// cancellation request because the window is now inactive.
//
// But it could be the case that, after this window became inactive,
// some other window came along and started a vibration. We don't
// want this window's cancellation request to cancel that window's
// actively-playing vibration!
//
// To solve this problem, we keep track of the id of the last window
// to start a vibration, and only accepts cancellation requests from
// the same window. All other cancellation requests are ignored.
if (InSandbox()) {
hal_sandbox::CancelVibrate(id);
}
else if (*gLastIDToVibrate == id.AsArray()) {
// Don't forward our ID to hal_impl. It doesn't need it, and we
// don't want it to be tempted to read it. The empty identifier
// will assert if it's used.
HAL_LOG(("CancelVibrate: Forwarding to hal_impl."));
hal_impl::CancelVibrate(WindowIdentifier());
}
}
template <class InfoType>
class ObserversManager
{
public:
void AddObserver(Observer<InfoType>* aObserver) {
if (!mObservers) {
mObservers = new mozilla::ObserverList<InfoType>();
}
mObservers->AddObserver(aObserver);
if (mObservers->Length() == 1) {
EnableNotifications();
}
}
void RemoveObserver(Observer<InfoType>* aObserver) {
// If mObservers is null, that means there are no observers.
// In addition, if RemoveObserver() returns false, that means we didn't
// find the observer.
// In both cases, that is a logical error we want to make sure the developer
// notices.
MOZ_ASSERT(mObservers);
#ifndef DEBUG
if (!mObservers) {
return;
}
#endif
DebugOnly<bool> removed = mObservers->RemoveObserver(aObserver);
MOZ_ASSERT(removed);
if (mObservers->Length() == 0) {
DisableNotifications();
OnNotificationsDisabled();
delete mObservers;
mObservers = 0;
}
}
void BroadcastInformation(const InfoType& aInfo) {
MOZ_ASSERT(mObservers);
mObservers->Broadcast(aInfo);
}
protected:
virtual void EnableNotifications() = 0;
virtual void DisableNotifications() = 0;
virtual void OnNotificationsDisabled() {}
private:
mozilla::ObserverList<InfoType>* mObservers;
};
template <class InfoType>
class CachingObserversManager : public ObserversManager<InfoType>
{
public:
InfoType GetCurrentInformation() {
if (mHasValidCache) {
return mInfo;
}
GetCurrentInformationInternal(&mInfo);
return mInfo;
}
void CacheInformation(const InfoType& aInfo) {
mHasValidCache = true;
mInfo = aInfo;
}
void BroadcastCachedInformation() {
this->BroadcastInformation(mInfo);
}
protected:
virtual void GetCurrentInformationInternal(InfoType*) = 0;
virtual void OnNotificationsDisabled() {
mHasValidCache = false;
}
private:
InfoType mInfo;
bool mHasValidCache;
};
class BatteryObserversManager : public CachingObserversManager<BatteryInformation>
{
protected:
void EnableNotifications() {
PROXY_IF_SANDBOXED(EnableBatteryNotifications());
}
void DisableNotifications() {
PROXY_IF_SANDBOXED(DisableBatteryNotifications());
}
void GetCurrentInformationInternal(BatteryInformation* aInfo) {
PROXY_IF_SANDBOXED(GetCurrentBatteryInformation(aInfo));
}
};
static BatteryObserversManager sBatteryObservers;
class NetworkObserversManager : public CachingObserversManager<NetworkInformation>
{
protected:
void EnableNotifications() {
PROXY_IF_SANDBOXED(EnableNetworkNotifications());
}
void DisableNotifications() {
PROXY_IF_SANDBOXED(DisableNetworkNotifications());
}
void GetCurrentInformationInternal(NetworkInformation* aInfo) {
PROXY_IF_SANDBOXED(GetCurrentNetworkInformation(aInfo));
}
};
static NetworkObserversManager sNetworkObservers;
class WakeLockObserversManager : public ObserversManager<WakeLockInformation>
{
protected:
void EnableNotifications() {
PROXY_IF_SANDBOXED(EnableWakeLockNotifications());
}
void DisableNotifications() {
PROXY_IF_SANDBOXED(DisableWakeLockNotifications());
}
};
static WakeLockObserversManager sWakeLockObservers;
class ScreenOrientationObserversManager : public CachingObserversManager<dom::ScreenOrientationWrapper>
{
protected:
void EnableNotifications() {
PROXY_IF_SANDBOXED(EnableScreenOrientationNotifications());
}
void DisableNotifications() {
PROXY_IF_SANDBOXED(DisableScreenOrientationNotifications());
}
void GetCurrentInformationInternal(dom::ScreenOrientationWrapper* aInfo) {
PROXY_IF_SANDBOXED(GetCurrentScreenOrientation(&(aInfo->orientation)));
}
};
static ScreenOrientationObserversManager sScreenOrientationObservers;
void
RegisterBatteryObserver(BatteryObserver* aObserver)
{
AssertMainThread();
sBatteryObservers.AddObserver(aObserver);
}
void
UnregisterBatteryObserver(BatteryObserver* aObserver)
{
AssertMainThread();
sBatteryObservers.RemoveObserver(aObserver);
}
void
GetCurrentBatteryInformation(BatteryInformation* aInfo)
{
AssertMainThread();
*aInfo = sBatteryObservers.GetCurrentInformation();
}
void
NotifyBatteryChange(const BatteryInformation& aInfo)
{
AssertMainThread();
sBatteryObservers.CacheInformation(aInfo);
sBatteryObservers.BroadcastCachedInformation();
}
bool GetScreenEnabled()
{
AssertMainThread();
RETURN_PROXY_IF_SANDBOXED(GetScreenEnabled());
}
void SetScreenEnabled(bool enabled)
{
AssertMainThread();
PROXY_IF_SANDBOXED(SetScreenEnabled(enabled));
}
bool GetCpuSleepAllowed()
{
// Generally for interfaces that are accessible by normal web content
// we should cache the result and be notified on state changes, like
// what the battery API does. But since this is only used by
// privileged interface, the synchronous getter is OK here.
AssertMainThread();
RETURN_PROXY_IF_SANDBOXED(GetCpuSleepAllowed());
}
void SetCpuSleepAllowed(bool allowed)
{
AssertMainThread();
PROXY_IF_SANDBOXED(SetCpuSleepAllowed(allowed));
}
double GetScreenBrightness()
{
AssertMainThread();
RETURN_PROXY_IF_SANDBOXED(GetScreenBrightness());
}
void SetScreenBrightness(double brightness)
{
AssertMainThread();
PROXY_IF_SANDBOXED(SetScreenBrightness(clamped(brightness, 0.0, 1.0)));
}
bool SetLight(LightType light, const hal::LightConfiguration& aConfig)
{
AssertMainThread();
RETURN_PROXY_IF_SANDBOXED(SetLight(light, aConfig));
}
bool GetLight(LightType light, hal::LightConfiguration* aConfig)
{
AssertMainThread();
RETURN_PROXY_IF_SANDBOXED(GetLight(light, aConfig));
}
void
AdjustSystemClock(int32_t aDeltaMilliseconds)
{
AssertMainThread();
PROXY_IF_SANDBOXED(AdjustSystemClock(aDeltaMilliseconds));
}
void
SetTimezone(const nsCString& aTimezoneSpec)
{
AssertMainThread();
PROXY_IF_SANDBOXED(SetTimezone(aTimezoneSpec));
}
void
EnableSensorNotifications(SensorType aSensor) {
AssertMainThread();
PROXY_IF_SANDBOXED(EnableSensorNotifications(aSensor));
}
void
DisableSensorNotifications(SensorType aSensor) {
AssertMainThread();
PROXY_IF_SANDBOXED(DisableSensorNotifications(aSensor));
}
typedef mozilla::ObserverList<SensorData> SensorObserverList;
static SensorObserverList* gSensorObservers = NULL;
static SensorObserverList &
GetSensorObservers(SensorType sensor_type) {
MOZ_ASSERT(sensor_type < NUM_SENSOR_TYPE);
if(gSensorObservers == NULL)
gSensorObservers = new SensorObserverList[NUM_SENSOR_TYPE];
return gSensorObservers[sensor_type];
}
void
RegisterSensorObserver(SensorType aSensor, ISensorObserver *aObserver) {
SensorObserverList &observers = GetSensorObservers(aSensor);
AssertMainThread();
observers.AddObserver(aObserver);
if(observers.Length() == 1) {
EnableSensorNotifications(aSensor);
}
}
void
UnregisterSensorObserver(SensorType aSensor, ISensorObserver *aObserver) {
SensorObserverList &observers = GetSensorObservers(aSensor);
AssertMainThread();
observers.RemoveObserver(aObserver);
if(observers.Length() == 0) {
DisableSensorNotifications(aSensor);
delete [] gSensorObservers;
gSensorObservers = nsnull;
}
}
void
NotifySensorChange(const SensorData &aSensorData) {
SensorObserverList &observers = GetSensorObservers(aSensorData.sensor());
AssertMainThread();
observers.Broadcast(aSensorData);
}
void
RegisterNetworkObserver(NetworkObserver* aObserver)
{
AssertMainThread();
sNetworkObservers.AddObserver(aObserver);
}
void
UnregisterNetworkObserver(NetworkObserver* aObserver)
{
AssertMainThread();
sNetworkObservers.RemoveObserver(aObserver);
}
void
GetCurrentNetworkInformation(NetworkInformation* aInfo)
{
AssertMainThread();
*aInfo = sNetworkObservers.GetCurrentInformation();
}
void
NotifyNetworkChange(const NetworkInformation& aInfo)
{
sNetworkObservers.CacheInformation(aInfo);
sNetworkObservers.BroadcastCachedInformation();
}
void Reboot()
{
AssertMainThread();
PROXY_IF_SANDBOXED(Reboot());
}
void PowerOff()
{
AssertMainThread();
PROXY_IF_SANDBOXED(PowerOff());
}
void
RegisterWakeLockObserver(WakeLockObserver* aObserver)
{
AssertMainThread();
sWakeLockObservers.AddObserver(aObserver);
}
void
UnregisterWakeLockObserver(WakeLockObserver* aObserver)
{
AssertMainThread();
sWakeLockObservers.RemoveObserver(aObserver);
}
void
ModifyWakeLock(const nsAString &aTopic,
hal::WakeLockControl aLockAdjust,
hal::WakeLockControl aHiddenAdjust)
{
AssertMainThread();
PROXY_IF_SANDBOXED(ModifyWakeLock(aTopic, aLockAdjust, aHiddenAdjust));
}
void
GetWakeLockInfo(const nsAString &aTopic, WakeLockInformation *aWakeLockInfo)
{
AssertMainThread();
PROXY_IF_SANDBOXED(GetWakeLockInfo(aTopic, aWakeLockInfo));
}
void
NotifyWakeLockChange(const WakeLockInformation& aInfo)
{
AssertMainThread();
sWakeLockObservers.BroadcastInformation(aInfo);
}
void
RegisterScreenOrientationObserver(hal::ScreenOrientationObserver* aObserver)
{
AssertMainThread();
sScreenOrientationObservers.AddObserver(aObserver);
}
void
UnregisterScreenOrientationObserver(hal::ScreenOrientationObserver* aObserver)
{
AssertMainThread();
sScreenOrientationObservers.RemoveObserver(aObserver);
}
void
GetCurrentScreenOrientation(dom::ScreenOrientation* aScreenOrientation)
{
AssertMainThread();
*aScreenOrientation = sScreenOrientationObservers.GetCurrentInformation().orientation;
}
void
NotifyScreenOrientationChange(const dom::ScreenOrientation& aScreenOrientation)
{
sScreenOrientationObservers.CacheInformation(dom::ScreenOrientationWrapper(aScreenOrientation));
sScreenOrientationObservers.BroadcastCachedInformation();
}
bool
LockScreenOrientation(const dom::ScreenOrientation& aOrientation)
{
AssertMainThread();
RETURN_PROXY_IF_SANDBOXED(LockScreenOrientation(aOrientation));
}
void
UnlockScreenOrientation()
{
AssertMainThread();
PROXY_IF_SANDBOXED(UnlockScreenOrientation());
}
} // namespace hal
} // namespace mozilla
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