gecko/dom/system/nsDeviceSensors.cpp
2012-05-21 12:12:37 +01:00

368 lines
10 KiB
C++

/* 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 "nsIDOMEventTarget.h"
#include "nsIServiceManager.h"
#include "nsIPrivateDOMEvent.h"
#include "nsIServiceManager.h"
#include "mozilla/Preferences.h"
using namespace mozilla;
using namespace hal;
#undef near
// also see sDefaultSensorHint in mobile/android/base/GeckoAppShell.java
#define DEFAULT_SENSOR_POLL 100
static const nsTArray<nsIDOMWindow*>::index_type NoIndex =
nsTArray<nsIDOMWindow*>::NoIndex;
class nsDeviceSensorData : 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(PRUint32 *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_ISUPPORTS1(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::AddWindowListener(PRUint32 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(PRUint32 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;
}
void
nsDeviceSensors::Notify(const mozilla::hal::SensorData& aSensorData)
{
PRUint32 type = aSensorData.sensor();
double x = aSensorData.values()[0];
double y = aSensorData.values()[1];
double z = aSensorData.values()[2];
nsCOMArray<nsIDOMWindow> windowListeners;
for (PRUint32 i = 0; i < mWindowListeners[type]->Length(); i++) {
windowListeners.AppendObject(mWindowListeners[type]->SafeElementAt(i));
}
for (PRUint32 i = windowListeners.Count(); i > 0 ; ) {
--i;
// check to see if this window is in the background. if
// it is, don't send any device motion to it.
nsCOMPtr<nsPIDOMWindow> pwindow = do_QueryInterface(windowListeners[i]);
if (!pwindow ||
!pwindow->GetOuterWindow() ||
pwindow->GetOuterWindow()->IsBackground())
continue;
nsCOMPtr<nsIDOMDocument> domdoc;
windowListeners[i]->GetDocument(getter_AddRefs(domdoc));
if (domdoc) {
nsCOMPtr<nsIDOMEventTarget> 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(domdoc, 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(nsIDOMEventTarget *aTarget,
double aValue)
{
nsCOMPtr<nsIDOMEvent> event;
NS_NewDOMDeviceLightEvent(getter_AddRefs(event), nsnull, nsnull);
nsCOMPtr<nsIDOMDeviceLightEvent> oe = do_QueryInterface(event);
oe->InitDeviceLightEvent(NS_LITERAL_STRING("devicelight"),
true,
false,
aValue);
nsCOMPtr<nsIPrivateDOMEvent> privateEvent = do_QueryInterface(event);
if (privateEvent) {
privateEvent->SetTrusted(true);
}
bool defaultActionEnabled;
aTarget->DispatchEvent(event, &defaultActionEnabled);
}
void
nsDeviceSensors::FireDOMProximityEvent(nsIDOMEventTarget *aTarget,
double aValue,
double aMin,
double aMax)
{
nsCOMPtr<nsIDOMEvent> event;
NS_NewDOMDeviceProximityEvent(getter_AddRefs(event), nsnull, nsnull);
nsCOMPtr<nsIDOMDeviceProximityEvent> oe = do_QueryInterface(event);
oe->InitDeviceProximityEvent(NS_LITERAL_STRING("deviceproximity"),
true,
false,
aValue,
aMin,
aMax);
nsCOMPtr<nsIPrivateDOMEvent> privateEvent = do_QueryInterface(event);
if (privateEvent) {
privateEvent->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(nsIDOMEventTarget *aTarget, bool aNear)
{
nsCOMPtr<nsIDOMEvent> event;
NS_NewDOMUserProximityEvent(getter_AddRefs(event), nsnull, nsnull);
nsCOMPtr<nsIDOMUserProximityEvent> pe = do_QueryInterface(event);
pe->InitUserProximityEvent(NS_LITERAL_STRING("userproximity"),
true,
false,
aNear);
nsCOMPtr<nsIPrivateDOMEvent> privateEvent = do_QueryInterface(event);
if (privateEvent) {
privateEvent->SetTrusted(true);
}
bool defaultActionEnabled;
aTarget->DispatchEvent(event, &defaultActionEnabled);
}
void
nsDeviceSensors::FireDOMOrientationEvent(nsIDOMDocument *domdoc,
nsIDOMEventTarget *target,
double alpha,
double beta,
double gamma)
{
nsCOMPtr<nsIDOMEvent> event;
bool defaultActionEnabled = true;
domdoc->CreateEvent(NS_LITERAL_STRING("DeviceOrientationEvent"), getter_AddRefs(event));
nsCOMPtr<nsIDOMDeviceOrientationEvent> oe = do_QueryInterface(event);
if (!oe) {
return;
}
oe->InitDeviceOrientationEvent(NS_LITERAL_STRING("deviceorientation"),
true,
false,
alpha,
beta,
gamma,
true);
nsCOMPtr<nsIPrivateDOMEvent> privateEvent = do_QueryInterface(event);
if (privateEvent)
privateEvent->SetTrusted(true);
target->DispatchEvent(event, &defaultActionEnabled);
}
void
nsDeviceSensors::FireDOMMotionEvent(nsIDOMDocument *domdoc,
nsIDOMEventTarget *target,
PRUint32 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:
mLastAcceleration = new nsDOMDeviceAcceleration(x, y, z);
break;
case nsIDeviceSensorData::TYPE_ACCELERATION:
mLastAccelerationIncluduingGravity = new nsDOMDeviceAcceleration(x, y, z);
break;
case nsIDeviceSensorData::TYPE_GYROSCOPE:
mLastRotationRate = new nsDOMDeviceRotationRate(x, y, z);
break;
}
if (!fireEvent && (!mLastAcceleration || !mLastAccelerationIncluduingGravity || !mLastRotationRate)) {
return;
}
nsCOMPtr<nsIDOMEvent> event;
domdoc->CreateEvent(NS_LITERAL_STRING("DeviceMotionEvent"), getter_AddRefs(event));
nsCOMPtr<nsIDOMDeviceMotionEvent> me = do_QueryInterface(event);
if (!me)
return;
me->InitDeviceMotionEvent(NS_LITERAL_STRING("devicemotion"),
true,
false,
mLastAcceleration,
mLastAccelerationIncluduingGravity,
mLastRotationRate,
DEFAULT_SENSOR_POLL);
nsCOMPtr<nsIPrivateDOMEvent> privateEvent = do_QueryInterface(event);
if (privateEvent)
privateEvent->SetTrusted(true);
bool defaultActionEnabled = true;
target->DispatchEvent(event, &defaultActionEnabled);
mLastRotationRate = nsnull;
mLastAccelerationIncluduingGravity = nsnull;
mLastAcceleration = nsnull;
mLastDOMMotionEventTime = TimeStamp::Now();
}