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tenfourfox/dom/system/nsDeviceSensors.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/Hal.h"
#include "mozilla/HalSensor.h"
#include "nsDeviceSensors.h"
#include "nsAutoPtr.h"
#include "nsIDOMEvent.h"
#include "nsIDOMWindow.h"
#include "nsPIDOMWindow.h"
#include "nsIDOMDocument.h"
#include "nsIServiceManager.h"
#include "nsIServiceManager.h"
#include "mozilla/Preferences.h"
#include "mozilla/Attributes.h"
#include "mozilla/Services.h"
#include "nsIPermissionManager.h"
#include "mozilla/dom/DeviceLightEvent.h"
#include "mozilla/dom/DeviceOrientationEvent.h"
#include "mozilla/dom/DeviceProximityEvent.h"
#include "mozilla/dom/UserProximityEvent.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace hal;
#undef near
#define DEFAULT_SENSOR_POLL 100
static const nsTArray<nsIDOMWindow*>::index_type NoIndex =
nsTArray<nsIDOMWindow*>::NoIndex;
class nsDeviceSensorData final : public nsIDeviceSensorData
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIDEVICESENSORDATA
nsDeviceSensorData(unsigned long type, double x, double y, double z);
private:
~nsDeviceSensorData();
protected:
unsigned long mType;
double mX, mY, mZ;
};
nsDeviceSensorData::nsDeviceSensorData(unsigned long type, double x, double y, double z)
: mType(type), mX(x), mY(y), mZ(z)
{
}
NS_INTERFACE_MAP_BEGIN(nsDeviceSensorData)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDeviceSensorData)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsDeviceSensorData)
NS_IMPL_RELEASE(nsDeviceSensorData)
nsDeviceSensorData::~nsDeviceSensorData()
{
}
NS_IMETHODIMP nsDeviceSensorData::GetType(uint32_t *aType)
{
NS_ENSURE_ARG_POINTER(aType);
*aType = mType;
return NS_OK;
}
NS_IMETHODIMP nsDeviceSensorData::GetX(double *aX)
{
NS_ENSURE_ARG_POINTER(aX);
*aX = mX;
return NS_OK;
}
NS_IMETHODIMP nsDeviceSensorData::GetY(double *aY)
{
NS_ENSURE_ARG_POINTER(aY);
*aY = mY;
return NS_OK;
}
NS_IMETHODIMP nsDeviceSensorData::GetZ(double *aZ)
{
NS_ENSURE_ARG_POINTER(aZ);
*aZ = mZ;
return NS_OK;
}
NS_IMPL_ISUPPORTS(nsDeviceSensors, nsIDeviceSensors)
nsDeviceSensors::nsDeviceSensors()
{
mIsUserProximityNear = false;
mLastDOMMotionEventTime = TimeStamp::Now();
mEnabled = Preferences::GetBool("device.sensors.enabled", true);
for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
nsTArray<nsIDOMWindow*> *windows = new nsTArray<nsIDOMWindow*>();
mWindowListeners.AppendElement(windows);
}
mLastDOMMotionEventTime = TimeStamp::Now();
}
nsDeviceSensors::~nsDeviceSensors()
{
for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
if (IsSensorEnabled(i))
UnregisterSensorObserver((SensorType)i, this);
}
for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
delete mWindowListeners[i];
}
}
NS_IMETHODIMP nsDeviceSensors::HasWindowListener(uint32_t aType, nsIDOMWindow *aWindow, bool *aRetVal)
{
if (!mEnabled)
*aRetVal = false;
else
*aRetVal = mWindowListeners[aType]->IndexOf(aWindow) != NoIndex;
return NS_OK;
}
NS_IMETHODIMP nsDeviceSensors::AddWindowListener(uint32_t aType, nsIDOMWindow *aWindow)
{
if (!mEnabled)
return NS_OK;
if (mWindowListeners[aType]->IndexOf(aWindow) != NoIndex)
return NS_OK;
if (!IsSensorEnabled(aType)) {
RegisterSensorObserver((SensorType)aType, this);
}
mWindowListeners[aType]->AppendElement(aWindow);
return NS_OK;
}
NS_IMETHODIMP nsDeviceSensors::RemoveWindowListener(uint32_t aType, nsIDOMWindow *aWindow)
{
if (mWindowListeners[aType]->IndexOf(aWindow) == NoIndex)
return NS_OK;
mWindowListeners[aType]->RemoveElement(aWindow);
if (mWindowListeners[aType]->Length() == 0)
UnregisterSensorObserver((SensorType)aType, this);
return NS_OK;
}
NS_IMETHODIMP nsDeviceSensors::RemoveWindowAsListener(nsIDOMWindow *aWindow)
{
for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
RemoveWindowListener((SensorType)i, aWindow);
}
return NS_OK;
}
static bool
WindowCannotReceiveSensorEvent (nsPIDOMWindow* aWindow)
{
// Check to see if this window is in the background. If
// it is and it does not have the "background-sensors" permission,
// don't send any device motion events to it.
if (!aWindow || !aWindow->IsCurrentInnerWindow()) {
return true;
}
if (aWindow->GetOuterWindow()->IsBackground()) {
nsCOMPtr<nsIPermissionManager> permMgr =
services::GetPermissionManager();
NS_ENSURE_TRUE(permMgr, false);
uint32_t permission = nsIPermissionManager::DENY_ACTION;
permMgr->TestPermissionFromWindow(aWindow, "background-sensors", &permission);
return permission != nsIPermissionManager::ALLOW_ACTION;
}
return false;
}
void
nsDeviceSensors::Notify(const mozilla::hal::SensorData& aSensorData)
{
uint32_t type = aSensorData.sensor();
const InfallibleTArray<float>& values = aSensorData.values();
size_t len = values.Length();
double x = len > 0 ? values[0] : 0.0;
double y = len > 1 ? values[1] : 0.0;
double z = len > 2 ? values[2] : 0.0;
nsCOMArray<nsIDOMWindow> windowListeners;
for (uint32_t i = 0; i < mWindowListeners[type]->Length(); i++) {
windowListeners.AppendObject(mWindowListeners[type]->SafeElementAt(i));
}
for (uint32_t i = windowListeners.Count(); i > 0 ; ) {
--i;
nsCOMPtr<nsPIDOMWindow> pwindow = do_QueryInterface(windowListeners[i]);
if (WindowCannotReceiveSensorEvent(pwindow)) {
continue;
}
if (nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(pwindow->GetDoc())) {
nsCOMPtr<mozilla::dom::EventTarget> target = do_QueryInterface(windowListeners[i]);
if (type == nsIDeviceSensorData::TYPE_ACCELERATION ||
type == nsIDeviceSensorData::TYPE_LINEAR_ACCELERATION ||
type == nsIDeviceSensorData::TYPE_GYROSCOPE)
FireDOMMotionEvent(domDoc, target, type, x, y, z);
else if (type == nsIDeviceSensorData::TYPE_ORIENTATION)
FireDOMOrientationEvent(target, x, y, z);
else if (type == nsIDeviceSensorData::TYPE_PROXIMITY)
FireDOMProximityEvent(target, x, y, z);
else if (type == nsIDeviceSensorData::TYPE_LIGHT)
FireDOMLightEvent(target, x);
}
}
}
void
nsDeviceSensors::FireDOMLightEvent(mozilla::dom::EventTarget* aTarget,
double aValue)
{
DeviceLightEventInit init;
init.mBubbles = true;
init.mCancelable = false;
init.mValue = aValue;
RefPtr<DeviceLightEvent> event =
DeviceLightEvent::Constructor(aTarget, NS_LITERAL_STRING("devicelight"), init);
event->SetTrusted(true);
bool defaultActionEnabled;
aTarget->DispatchEvent(event, &defaultActionEnabled);
}
void
nsDeviceSensors::FireDOMProximityEvent(mozilla::dom::EventTarget* aTarget,
double aValue,
double aMin,
double aMax)
{
DeviceProximityEventInit init;
init.mBubbles = true;
init.mCancelable = false;
init.mValue = aValue;
init.mMin = aMin;
init.mMax = aMax;
RefPtr<DeviceProximityEvent> event =
DeviceProximityEvent::Constructor(aTarget,
NS_LITERAL_STRING("deviceproximity"),
init);
event->SetTrusted(true);
bool defaultActionEnabled;
aTarget->DispatchEvent(event, &defaultActionEnabled);
// Some proximity sensors only support a binary near or
// far measurement. In this case, the sensor should report
// its maximum range value in the far state and a lesser
// value in the near state.
bool near = (aValue < aMax);
if (mIsUserProximityNear != near) {
mIsUserProximityNear = near;
FireDOMUserProximityEvent(aTarget, mIsUserProximityNear);
}
}
void
nsDeviceSensors::FireDOMUserProximityEvent(mozilla::dom::EventTarget* aTarget,
bool aNear)
{
UserProximityEventInit init;
init.mBubbles = true;
init.mCancelable = false;
init.mNear = aNear;
RefPtr<UserProximityEvent> event =
UserProximityEvent::Constructor(aTarget,
NS_LITERAL_STRING("userproximity"),
init);
event->SetTrusted(true);
bool defaultActionEnabled;
aTarget->DispatchEvent(event, &defaultActionEnabled);
}
void
nsDeviceSensors::FireDOMOrientationEvent(EventTarget* aTarget,
double aAlpha,
double aBeta,
double aGamma)
{
DeviceOrientationEventInit init;
init.mBubbles = true;
init.mCancelable = false;
init.mAlpha.SetValue(aAlpha);
init.mBeta.SetValue(aBeta);
init.mGamma.SetValue(aGamma);
init.mAbsolute = true;
RefPtr<DeviceOrientationEvent> event =
DeviceOrientationEvent::Constructor(aTarget,
NS_LITERAL_STRING("deviceorientation"),
init);
event->SetTrusted(true);
bool dummy;
aTarget->DispatchEvent(event, &dummy);
}
void
nsDeviceSensors::FireDOMMotionEvent(nsIDOMDocument *domdoc,
EventTarget* target,
uint32_t type,
double x,
double y,
double z)
{
// Attempt to coalesce events
bool fireEvent = TimeStamp::Now() > mLastDOMMotionEventTime + TimeDuration::FromMilliseconds(DEFAULT_SENSOR_POLL);
switch (type) {
case nsIDeviceSensorData::TYPE_LINEAR_ACCELERATION:
if (!mLastAcceleration) {
mLastAcceleration.emplace();
}
mLastAcceleration->mX.SetValue(x);
mLastAcceleration->mY.SetValue(y);
mLastAcceleration->mZ.SetValue(z);
break;
case nsIDeviceSensorData::TYPE_ACCELERATION:
if (!mLastAccelerationIncludingGravity) {
mLastAccelerationIncludingGravity.emplace();
}
mLastAccelerationIncludingGravity->mX.SetValue(x);
mLastAccelerationIncludingGravity->mY.SetValue(y);
mLastAccelerationIncludingGravity->mZ.SetValue(z);
break;
case nsIDeviceSensorData::TYPE_GYROSCOPE:
if (!mLastRotationRate) {
mLastRotationRate.emplace();
}
mLastRotationRate->mAlpha.SetValue(x);
mLastRotationRate->mBeta.SetValue(y);
mLastRotationRate->mGamma.SetValue(z);
break;
}
if (fireEvent) {
if (!mLastAcceleration) {
mLastAcceleration.emplace();
}
if (!mLastAccelerationIncludingGravity) {
mLastAccelerationIncludingGravity.emplace();
}
if (!mLastRotationRate) {
mLastRotationRate.emplace();
}
} else if (!mLastAcceleration ||
!mLastAccelerationIncludingGravity ||
!mLastRotationRate) {
return;
}
nsCOMPtr<nsIDOMEvent> event;
domdoc->CreateEvent(NS_LITERAL_STRING("DeviceMotionEvent"), getter_AddRefs(event));
DeviceMotionEvent* me = static_cast<DeviceMotionEvent*>(event.get());
me->InitDeviceMotionEvent(NS_LITERAL_STRING("devicemotion"),
true,
false,
*mLastAcceleration,
*mLastAccelerationIncludingGravity,
*mLastRotationRate,
Nullable<double>(DEFAULT_SENSOR_POLL));
event->SetTrusted(true);
bool defaultActionEnabled = true;
target->DispatchEvent(event, &defaultActionEnabled);
mLastRotationRate.reset();
mLastAccelerationIncludingGravity.reset();
mLastAcceleration.reset();
mLastDOMMotionEventTime = TimeStamp::Now();
}
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