mirror of
https://github.com/mozilla/gecko-dev.git
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599 lines
17 KiB
C++
599 lines
17 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Hal.h"
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#include "mozilla/HalSensor.h"
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#include "nsContentUtils.h"
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#include "nsDeviceSensors.h"
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#include "nsIDOMEvent.h"
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#include "nsIDOMWindow.h"
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#include "nsPIDOMWindow.h"
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#include "nsIDOMDocument.h"
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#include "nsIScriptObjectPrincipal.h"
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#include "nsIServiceManager.h"
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#include "nsIServiceManager.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/Services.h"
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#include "nsIPermissionManager.h"
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#include "mozilla/dom/DeviceLightEvent.h"
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#include "mozilla/dom/DeviceOrientationEvent.h"
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#include "mozilla/dom/DeviceProximityEvent.h"
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#include "mozilla/dom/UserProximityEvent.h"
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#include <cmath>
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using namespace mozilla;
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using namespace mozilla::dom;
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using namespace hal;
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#undef near
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#define DEFAULT_SENSOR_POLL 100
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static const nsTArray<nsIDOMWindow*>::index_type NoIndex =
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nsTArray<nsIDOMWindow*>::NoIndex;
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class nsDeviceSensorData final : public nsIDeviceSensorData
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDEVICESENSORDATA
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nsDeviceSensorData(unsigned long type, double x, double y, double z);
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private:
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~nsDeviceSensorData();
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protected:
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unsigned long mType;
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double mX, mY, mZ;
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};
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nsDeviceSensorData::nsDeviceSensorData(unsigned long type, double x, double y, double z)
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: mType(type), mX(x), mY(y), mZ(z)
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{
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}
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NS_INTERFACE_MAP_BEGIN(nsDeviceSensorData)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDeviceSensorData)
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NS_INTERFACE_MAP_END
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NS_IMPL_ADDREF(nsDeviceSensorData)
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NS_IMPL_RELEASE(nsDeviceSensorData)
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nsDeviceSensorData::~nsDeviceSensorData()
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{
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}
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NS_IMETHODIMP nsDeviceSensorData::GetType(uint32_t *aType)
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{
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NS_ENSURE_ARG_POINTER(aType);
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*aType = mType;
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceSensorData::GetX(double *aX)
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{
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NS_ENSURE_ARG_POINTER(aX);
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*aX = mX;
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceSensorData::GetY(double *aY)
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{
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NS_ENSURE_ARG_POINTER(aY);
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*aY = mY;
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceSensorData::GetZ(double *aZ)
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{
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NS_ENSURE_ARG_POINTER(aZ);
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*aZ = mZ;
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return NS_OK;
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}
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NS_IMPL_ISUPPORTS(nsDeviceSensors, nsIDeviceSensors)
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nsDeviceSensors::nsDeviceSensors()
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{
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mIsUserProximityNear = false;
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mLastDOMMotionEventTime = TimeStamp::Now();
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mEnabled = Preferences::GetBool("device.sensors.enabled", true);
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for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
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nsTArray<nsIDOMWindow*> *windows = new nsTArray<nsIDOMWindow*>();
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mWindowListeners.AppendElement(windows);
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}
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mLastDOMMotionEventTime = TimeStamp::Now();
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}
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nsDeviceSensors::~nsDeviceSensors()
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{
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for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
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if (IsSensorEnabled(i))
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UnregisterSensorObserver((SensorType)i, this);
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}
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for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
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delete mWindowListeners[i];
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}
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}
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NS_IMETHODIMP nsDeviceSensors::HasWindowListener(uint32_t aType, nsIDOMWindow *aWindow, bool *aRetVal)
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{
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if (AreSensorEventsDisabled(aWindow))
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*aRetVal = false;
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else
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*aRetVal = mWindowListeners[aType]->IndexOf(aWindow) != NoIndex;
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return NS_OK;
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}
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class DeviceSensorTestEvent : public Runnable
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{
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public:
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DeviceSensorTestEvent(nsDeviceSensors* aTarget, uint32_t aType)
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: mozilla::Runnable("DeviceSensorTestEvent")
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, mTarget(aTarget)
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, mType(aType)
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{
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}
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NS_IMETHOD Run() override
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{
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SensorData sensorData;
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sensorData.sensor() = static_cast<SensorType>(mType);
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sensorData.timestamp() = PR_Now();
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sensorData.values().AppendElement(0.5f);
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sensorData.values().AppendElement(0.5f);
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sensorData.values().AppendElement(0.5f);
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sensorData.values().AppendElement(0.5f);
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sensorData.accuracy() = SENSOR_ACCURACY_UNRELIABLE;
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mTarget->Notify(sensorData);
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return NS_OK;
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}
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private:
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RefPtr<nsDeviceSensors> mTarget;
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uint32_t mType;
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};
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static bool sTestSensorEvents = false;
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NS_IMETHODIMP nsDeviceSensors::AddWindowListener(uint32_t aType, nsIDOMWindow *aWindow)
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{
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if (AreSensorEventsDisabled(aWindow))
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return NS_OK;
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if (mWindowListeners[aType]->IndexOf(aWindow) != NoIndex)
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return NS_OK;
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if (!IsSensorEnabled(aType)) {
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RegisterSensorObserver((SensorType)aType, this);
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}
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mWindowListeners[aType]->AppendElement(aWindow);
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static bool sPrefCacheInitialized = false;
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if (!sPrefCacheInitialized) {
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sPrefCacheInitialized = true;
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Preferences::AddBoolVarCache(&sTestSensorEvents,
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"device.sensors.test.events",
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false);
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}
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if (sTestSensorEvents) {
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nsCOMPtr<nsIRunnable> event = new DeviceSensorTestEvent(this, aType);
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NS_DispatchToCurrentThread(event);
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceSensors::RemoveWindowListener(uint32_t aType, nsIDOMWindow *aWindow)
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{
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if (mWindowListeners[aType]->IndexOf(aWindow) == NoIndex)
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return NS_OK;
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mWindowListeners[aType]->RemoveElement(aWindow);
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if (mWindowListeners[aType]->Length() == 0)
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UnregisterSensorObserver((SensorType)aType, this);
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceSensors::RemoveWindowAsListener(nsIDOMWindow *aWindow)
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{
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for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
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RemoveWindowListener((SensorType)i, aWindow);
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}
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return NS_OK;
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}
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static bool
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WindowCannotReceiveSensorEvent (nsPIDOMWindowInner* aWindow)
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{
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// Check to see if this window is in the background. If
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// it is and it does not have the "background-sensors" permission,
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// don't send any device motion events to it.
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if (!aWindow || !aWindow->IsCurrentInnerWindow()) {
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return true;
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}
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bool disabled = aWindow->GetOuterWindow()->IsBackground() ||
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!aWindow->IsTopLevelWindowActive();
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if (!disabled) {
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nsCOMPtr<nsPIDOMWindowOuter> top = aWindow->GetScriptableTop();
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nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(aWindow);
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nsCOMPtr<nsIScriptObjectPrincipal> topSop = do_QueryInterface(top);
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if (!sop || !topSop) {
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return true;
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}
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nsIPrincipal* principal = sop->GetPrincipal();
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nsIPrincipal* topPrincipal = topSop->GetPrincipal();
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if (!principal || !topPrincipal) {
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return true;
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}
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disabled = !principal->Subsumes(topPrincipal);
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}
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if (disabled) {
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nsCOMPtr<nsIPermissionManager> permMgr =
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services::GetPermissionManager();
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NS_ENSURE_TRUE(permMgr, true);
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uint32_t permission = nsIPermissionManager::DENY_ACTION;
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permMgr->TestPermissionFromWindow(aWindow, "background-sensors", &permission);
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return permission != nsIPermissionManager::ALLOW_ACTION;
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}
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return false;
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}
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// Holds the device orientation in Euler angle degrees (azimuth, pitch, roll).
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struct Orientation
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{
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enum OrientationReference
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{
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kRelative = 0,
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kAbsolute
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};
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static Orientation RadToDeg(const Orientation& aOrient)
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{
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const static double kRadToDeg = 180.0 / M_PI;
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return { aOrient.alpha * kRadToDeg,
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aOrient.beta * kRadToDeg,
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aOrient.gamma * kRadToDeg };
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}
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double alpha;
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double beta;
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double gamma;
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};
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static Orientation
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RotationVectorToOrientation(double aX, double aY, double aZ, double aW) {
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double mat[9];
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mat[0] = 1 - 2*aY*aY - 2*aZ*aZ;
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mat[1] = 2*aX*aY - 2*aZ*aW;
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mat[2] = 2*aX*aZ + 2*aY*aW;
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mat[3] = 2*aX*aY + 2*aZ*aW;
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mat[4] = 1 - 2*aX*aX - 2*aZ*aZ;
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mat[5] = 2*aY*aZ - 2*aX*aW;
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mat[6] = 2*aX*aZ - 2*aY*aW;
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mat[7] = 2*aY*aZ + 2*aX*aW;
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mat[8] = 1 - 2*aX*aX - 2*aY*aY;
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Orientation orient;
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if (mat[8] > 0) {
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orient.alpha = atan2(-mat[1], mat[4]);
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orient.beta = asin(mat[7]);
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orient.gamma = atan2(-mat[6], mat[8]);
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} else if (mat[8] < 0) {
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orient.alpha = atan2(mat[1], -mat[4]);
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orient.beta = -asin(mat[7]);
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orient.beta += (orient.beta >= 0) ? -M_PI : M_PI;
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orient.gamma = atan2(mat[6], -mat[8]);
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} else {
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if (mat[6] > 0) {
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orient.alpha = atan2(-mat[1], mat[4]);
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orient.beta = asin(mat[7]);
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orient.gamma = -M_PI_2;
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} else if (mat[6] < 0) {
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orient.alpha = atan2(mat[1], -mat[4]);
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orient.beta = -asin(mat[7]);
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orient.beta += (orient.beta >= 0) ? -M_PI : M_PI;
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orient.gamma = -M_PI_2;
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} else {
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orient.alpha = atan2(mat[3], mat[0]);
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orient.beta = (mat[7] > 0) ? M_PI_2 : -M_PI_2;
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orient.gamma = 0;
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}
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}
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if (orient.alpha < 0) {
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orient.alpha += 2*M_PI;
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}
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return Orientation::RadToDeg(orient);
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}
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void
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nsDeviceSensors::Notify(const mozilla::hal::SensorData& aSensorData)
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{
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uint32_t type = aSensorData.sensor();
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const InfallibleTArray<float>& values = aSensorData.values();
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size_t len = values.Length();
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double x = len > 0 ? values[0] : 0.0;
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double y = len > 1 ? values[1] : 0.0;
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double z = len > 2 ? values[2] : 0.0;
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double w = len > 3 ? values[3] : 0.0;
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PRTime timestamp = aSensorData.timestamp();
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nsCOMArray<nsIDOMWindow> windowListeners;
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for (uint32_t i = 0; i < mWindowListeners[type]->Length(); i++) {
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windowListeners.AppendObject(mWindowListeners[type]->SafeElementAt(i));
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}
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for (uint32_t i = windowListeners.Count(); i > 0 ; ) {
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--i;
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nsCOMPtr<nsPIDOMWindowInner> pwindow = do_QueryInterface(windowListeners[i]);
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if (WindowCannotReceiveSensorEvent(pwindow)) {
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continue;
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}
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if (nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(pwindow->GetDoc())) {
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nsCOMPtr<mozilla::dom::EventTarget> target = do_QueryInterface(windowListeners[i]);
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if (type == nsIDeviceSensorData::TYPE_ACCELERATION ||
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type == nsIDeviceSensorData::TYPE_LINEAR_ACCELERATION ||
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type == nsIDeviceSensorData::TYPE_GYROSCOPE) {
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FireDOMMotionEvent(domDoc, target, type, timestamp, x, y, z);
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} else if (type == nsIDeviceSensorData::TYPE_ORIENTATION) {
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FireDOMOrientationEvent(target, x, y, z, Orientation::kAbsolute);
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} else if (type == nsIDeviceSensorData::TYPE_ROTATION_VECTOR) {
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const Orientation orient = RotationVectorToOrientation(x, y, z, w);
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FireDOMOrientationEvent(target, orient.alpha, orient.beta, orient.gamma,
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Orientation::kAbsolute);
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} else if (type == nsIDeviceSensorData::TYPE_GAME_ROTATION_VECTOR) {
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const Orientation orient = RotationVectorToOrientation(x, y, z, w);
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FireDOMOrientationEvent(target, orient.alpha, orient.beta, orient.gamma,
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Orientation::kRelative);
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} else if (type == nsIDeviceSensorData::TYPE_PROXIMITY) {
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FireDOMProximityEvent(target, x, y, z);
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} else if (type == nsIDeviceSensorData::TYPE_LIGHT) {
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FireDOMLightEvent(target, x);
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}
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}
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}
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}
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void
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nsDeviceSensors::FireDOMLightEvent(mozilla::dom::EventTarget* aTarget,
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double aValue)
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{
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DeviceLightEventInit init;
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init.mBubbles = true;
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init.mCancelable = false;
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init.mValue = round(aValue);
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RefPtr<DeviceLightEvent> event =
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DeviceLightEvent::Constructor(aTarget, NS_LITERAL_STRING("devicelight"), init);
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event->SetTrusted(true);
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bool defaultActionEnabled;
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aTarget->DispatchEvent(event, &defaultActionEnabled);
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}
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void
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nsDeviceSensors::FireDOMProximityEvent(mozilla::dom::EventTarget* aTarget,
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double aValue,
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double aMin,
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double aMax)
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{
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DeviceProximityEventInit init;
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init.mBubbles = true;
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init.mCancelable = false;
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init.mValue = aValue;
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init.mMin = aMin;
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init.mMax = aMax;
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RefPtr<DeviceProximityEvent> event =
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DeviceProximityEvent::Constructor(aTarget,
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NS_LITERAL_STRING("deviceproximity"),
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init);
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event->SetTrusted(true);
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bool defaultActionEnabled;
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aTarget->DispatchEvent(event, &defaultActionEnabled);
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// Some proximity sensors only support a binary near or
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// far measurement. In this case, the sensor should report
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// its maximum range value in the far state and a lesser
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// value in the near state.
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bool near = (aValue < aMax);
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if (mIsUserProximityNear != near) {
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mIsUserProximityNear = near;
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FireDOMUserProximityEvent(aTarget, mIsUserProximityNear);
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}
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}
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void
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nsDeviceSensors::FireDOMUserProximityEvent(mozilla::dom::EventTarget* aTarget,
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bool aNear)
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{
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UserProximityEventInit init;
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init.mBubbles = true;
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init.mCancelable = false;
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init.mNear = aNear;
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RefPtr<UserProximityEvent> event =
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UserProximityEvent::Constructor(aTarget,
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NS_LITERAL_STRING("userproximity"),
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init);
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event->SetTrusted(true);
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bool defaultActionEnabled;
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aTarget->DispatchEvent(event, &defaultActionEnabled);
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}
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void
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nsDeviceSensors::FireDOMOrientationEvent(EventTarget* aTarget,
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double aAlpha,
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double aBeta,
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double aGamma,
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bool aIsAbsolute)
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{
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DeviceOrientationEventInit init;
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init.mBubbles = true;
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init.mCancelable = false;
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init.mAlpha.SetValue(aAlpha);
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init.mBeta.SetValue(aBeta);
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init.mGamma.SetValue(aGamma);
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init.mAbsolute = aIsAbsolute;
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auto Dispatch = [&](EventTarget* aEventTarget, const nsAString& aType)
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{
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RefPtr<DeviceOrientationEvent> event =
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DeviceOrientationEvent::Constructor(aEventTarget, aType, init);
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event->SetTrusted(true);
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bool dummy;
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aEventTarget->DispatchEvent(event, &dummy);
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};
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Dispatch(aTarget, aIsAbsolute ? NS_LITERAL_STRING("absolutedeviceorientation") :
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NS_LITERAL_STRING("deviceorientation"));
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// This is used to determine whether relative events have been dispatched
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// during the current session, in which case we don't dispatch the additional
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// compatibility events.
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static bool sIsDispatchingRelativeEvents = false;
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sIsDispatchingRelativeEvents = sIsDispatchingRelativeEvents || !aIsAbsolute;
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// Android devices with SENSOR_GAME_ROTATION_VECTOR support dispatch
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// relative events for "deviceorientation" by default, while other platforms
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// and devices without such support dispatch absolute events by default.
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if (aIsAbsolute && !sIsDispatchingRelativeEvents) {
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// For absolute events on devices without support for relative events,
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// we need to additionally dispatch type "deviceorientation" to keep
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// backwards-compatibility.
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Dispatch(aTarget, NS_LITERAL_STRING("deviceorientation"));
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}
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}
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void
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nsDeviceSensors::FireDOMMotionEvent(nsIDOMDocument *domdoc,
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EventTarget* target,
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uint32_t type,
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PRTime timestamp,
|
|
double x,
|
|
double y,
|
|
double z)
|
|
{
|
|
// Attempt to coalesce events
|
|
TimeDuration sensorPollDuration =
|
|
TimeDuration::FromMilliseconds(DEFAULT_SENSOR_POLL);
|
|
bool fireEvent =
|
|
(TimeStamp::Now() > mLastDOMMotionEventTime + sensorPollDuration) ||
|
|
sTestSensorEvents;
|
|
|
|
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),
|
|
Nullable<uint64_t>(timestamp));
|
|
|
|
event->SetTrusted(true);
|
|
|
|
bool defaultActionEnabled = true;
|
|
target->DispatchEvent(event, &defaultActionEnabled);
|
|
|
|
mLastRotationRate.reset();
|
|
mLastAccelerationIncludingGravity.reset();
|
|
mLastAcceleration.reset();
|
|
mLastDOMMotionEventTime = TimeStamp::Now();
|
|
}
|
|
|
|
bool
|
|
nsDeviceSensors::AreSensorEventsDisabled(nsIDOMWindow* aWindow)
|
|
{
|
|
if (!mEnabled) {
|
|
return true;
|
|
}
|
|
|
|
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aWindow);
|
|
|
|
if (!window) {
|
|
return false;
|
|
}
|
|
|
|
return nsContentUtils::ShouldResistFingerprinting(window->GetDocShell());
|
|
}
|