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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
#include "WindowsLocationChild.h"
#include "nsCOMPtr.h"
#include "WindowsLocationProvider.h"
#include "mozilla/dom/GeolocationPosition.h"
#include "mozilla/dom/GeolocationPositionErrorBinding.h"
#include "mozilla/Telemetry.h"
#include "nsIGeolocationProvider.h"
#include <locationapi.h>
namespace mozilla::dom {
extern LazyLogModule gWindowsLocationProviderLog;
#define LOG(...) \
MOZ_LOG(gWindowsLocationProviderLog, LogLevel::Debug, (__VA_ARGS__))
class LocationEvent final : public ILocationEvents {
public:
explicit LocationEvent(WindowsLocationChild* aActor)
: mActor(aActor), mRefCnt(0) {}
// IUnknown interface
STDMETHODIMP_(ULONG) AddRef() override;
STDMETHODIMP_(ULONG) Release() override;
STDMETHODIMP QueryInterface(REFIID iid, void** ppv) override;
// ILocationEvents interface
STDMETHODIMP OnStatusChanged(REFIID aReportType,
LOCATION_REPORT_STATUS aStatus) override;
STDMETHODIMP OnLocationChanged(REFIID aReportType,
ILocationReport* aReport) override;
private:
// Making this a WeakPtr breaks the following cycle of strong references:
// WindowsLocationChild -> ILocation -> ILocationEvents (this)
// -> WindowsLocationChild.
WeakPtr<WindowsLocationChild> mActor;
ULONG mRefCnt;
};
STDMETHODIMP_(ULONG)
LocationEvent::AddRef() { return InterlockedIncrement(&mRefCnt); }
STDMETHODIMP_(ULONG)
LocationEvent::Release() {
ULONG count = InterlockedDecrement(&mRefCnt);
if (!count) {
delete this;
return 0;
}
return count;
}
STDMETHODIMP
LocationEvent::QueryInterface(REFIID iid, void** ppv) {
if (!ppv) {
return E_INVALIDARG;
}
if (iid == IID_IUnknown) {
*ppv = static_cast<IUnknown*>(this);
} else if (iid == IID_ILocationEvents) {
*ppv = static_cast<ILocationEvents*>(this);
} else {
*ppv = nullptr;
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
STDMETHODIMP
LocationEvent::OnStatusChanged(REFIID aReportType,
LOCATION_REPORT_STATUS aStatus) {
LOG("LocationEvent::OnStatusChanged(%p, %p, %s, %04x)", this, mActor.get(),
aReportType == IID_ILatLongReport ? "true" : "false",
static_cast<uint32_t>(aStatus));
if (!mActor || aReportType != IID_ILatLongReport) {
return S_OK;
}
// When registering event, REPORT_INITIALIZING is fired at first.
// Then, when the location is found, REPORT_RUNNING is fired.
// We ignore those messages.
uint16_t err;
switch (aStatus) {
case REPORT_ACCESS_DENIED:
err = GeolocationPositionError_Binding::PERMISSION_DENIED;
break;
case REPORT_NOT_SUPPORTED:
case REPORT_ERROR:
err = GeolocationPositionError_Binding::POSITION_UNAVAILABLE;
break;
default:
return S_OK;
}
mActor->SendFailed(err);
return S_OK;
}
STDMETHODIMP
LocationEvent::OnLocationChanged(REFIID aReportType, ILocationReport* aReport) {
LOG("LocationEvent::OnLocationChanged(%p, %p, %s)", this, mActor.get(),
aReportType == IID_ILatLongReport ? "true" : "false");
if (!mActor || aReportType != IID_ILatLongReport) {
return S_OK;
}
RefPtr<ILatLongReport> latLongReport;
if (FAILED(aReport->QueryInterface(IID_ILatLongReport,
getter_AddRefs(latLongReport)))) {
return E_FAIL;
}
DOUBLE latitude = 0.0;
latLongReport->GetLatitude(&latitude);
DOUBLE longitude = 0.0;
latLongReport->GetLongitude(&longitude);
DOUBLE alt = UnspecifiedNaN<double>();
latLongReport->GetAltitude(&alt);
DOUBLE herror = 0.0;
latLongReport->GetErrorRadius(&herror);
DOUBLE verror = UnspecifiedNaN<double>();
latLongReport->GetAltitudeError(&verror);
double heading = UnspecifiedNaN<double>();
double speed = UnspecifiedNaN<double>();
// nsGeoPositionCoords will convert NaNs to null for optional properties of
// the JavaScript Coordinates object.
RefPtr<nsGeoPosition> position =
new nsGeoPosition(latitude, longitude, alt, herror, verror, heading,
speed, PR_Now() / PR_USEC_PER_MSEC);
mActor->SendUpdate(position);
return S_OK;
}
WindowsLocationChild::WindowsLocationChild() {
LOG("WindowsLocationChild::WindowsLocationChild(%p)", this);
}
WindowsLocationChild::~WindowsLocationChild() {
LOG("WindowsLocationChild::~WindowsLocationChild(%p)", this);
}
::mozilla::ipc::IPCResult WindowsLocationChild::RecvStartup() {
LOG("WindowsLocationChild::RecvStartup(%p, %p)", this, mLocation.get());
if (mLocation) {
return IPC_OK();
}
RefPtr<ILocation> location;
if (FAILED(::CoCreateInstance(CLSID_Location, nullptr, CLSCTX_INPROC_SERVER,
IID_ILocation, getter_AddRefs(location)))) {
LOG("WindowsLocationChild(%p) failed to create ILocation", this);
// We will use MLS provider
SendFailed(GeolocationPositionError_Binding::POSITION_UNAVAILABLE);
return IPC_OK();
}
IID reportTypes[] = {IID_ILatLongReport};
if (FAILED(location->RequestPermissions(nullptr, reportTypes, 1, FALSE))) {
LOG("WindowsLocationChild(%p) failed to set ILocation permissions", this);
// We will use MLS provider
SendFailed(GeolocationPositionError_Binding::POSITION_UNAVAILABLE);
return IPC_OK();
}
mLocation = location;
return IPC_OK();
}
::mozilla::ipc::IPCResult WindowsLocationChild::RecvSetHighAccuracy(
bool aEnable) {
LOG("WindowsLocationChild::RecvSetHighAccuracy(%p, %p, %s)", this,
mLocation.get(), aEnable ? "true" : "false");
// We sometimes call SetHighAccuracy before Startup, so we save the
// request and set it later, in RegisterForReport.
mHighAccuracy = aEnable;
return IPC_OK();
}
::mozilla::ipc::IPCResult WindowsLocationChild::RecvRegisterForReport() {
LOG("WindowsLocationChild::RecvRegisterForReport(%p, %p)", this,
mLocation.get());
if (!mLocation) {
SendFailed(GeolocationPositionError_Binding::POSITION_UNAVAILABLE);
return IPC_OK();
}
LOCATION_DESIRED_ACCURACY desiredAccuracy;
if (mHighAccuracy) {
desiredAccuracy = LOCATION_DESIRED_ACCURACY_HIGH;
} else {
desiredAccuracy = LOCATION_DESIRED_ACCURACY_DEFAULT;
}
if (NS_WARN_IF(FAILED(mLocation->SetDesiredAccuracy(IID_ILatLongReport,
desiredAccuracy)))) {
SendFailed(GeolocationPositionError_Binding::POSITION_UNAVAILABLE);
return IPC_OK();
}
auto event = MakeRefPtr<LocationEvent>(this);
if (NS_WARN_IF(
FAILED(mLocation->RegisterForReport(event, IID_ILatLongReport, 0)))) {
SendFailed(GeolocationPositionError_Binding::POSITION_UNAVAILABLE);
}
LOG("WindowsLocationChild::RecvRegisterForReport successfully registered");
return IPC_OK();
}
::mozilla::ipc::IPCResult WindowsLocationChild::RecvUnregisterForReport() {
LOG("WindowsLocationChild::RecvUnregisterForReport(%p, %p)", this,
mLocation.get());
if (!mLocation) {
return IPC_OK();
}
// This will free the LocationEvent we created in RecvRegisterForReport.
Unused << NS_WARN_IF(
FAILED(mLocation->UnregisterForReport(IID_ILatLongReport)));
// The ILocation object is not reusable. Unregistering, restarting and
// re-registering for reports does not work; the callback is never
// called in that case. For that reason, we re-create the ILocation
// object with a call to Startup after unregistering if we need it again.
mLocation = nullptr;
return IPC_OK();
}
void WindowsLocationChild::ActorDestroy(ActorDestroyReason aWhy) {
LOG("WindowsLocationChild::ActorDestroy(%p, %p)", this, mLocation.get());
mLocation = nullptr;
}
} // namespace mozilla::dom