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fune/dom/system/linux/GeoclueLocationProvider.cpp

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/*
* 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/.
*
* Author: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
*/
#include "GeoclueLocationProvider.h"
#include <gio/gio.h>
#include <glib.h>
#include "mozilla/FloatingPoint.h"
#include "mozilla/GRefPtr.h"
#include "mozilla/GUniquePtr.h"
#include "mozilla/Logging.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/StaticPrefs_geo.h"
#include "mozilla/UniquePtrExtensions.h"
#include "mozilla/WeakPtr.h"
#include "mozilla/XREAppData.h"
#include "mozilla/dom/GeolocationPosition.h"
#include "mozilla/dom/GeolocationPositionErrorBinding.h"
#include "MLSFallback.h"
#include "nsAppRunner.h"
#include "nsCOMPtr.h"
#include "nsIDOMGeoPosition.h"
#include "nsINamed.h"
#include "nsITimer.h"
#include "nsStringFwd.h"
#include "prtime.h"
namespace mozilla::dom {
static LazyLogModule gGCLocationLog("GeoclueLocation");
#define GCL_LOG(level, ...) \
MOZ_LOG(gGCLocationLog, mozilla::LogLevel::level, (__VA_ARGS__))
static const char* const kGeoclueBusName = "org.freedesktop.GeoClue2";
static const char* const kGCManagerPath = "/org/freedesktop/GeoClue2/Manager";
static const char* const kGCManagerInterface =
"org.freedesktop.GeoClue2.Manager";
static const char* const kGCClientInterface = "org.freedesktop.GeoClue2.Client";
static const char* const kGCLocationInterface =
"org.freedesktop.GeoClue2.Location";
static const char* const kDBPropertySetMethod =
"org.freedesktop.DBus.Properties.Set";
/*
* Minimum altitude reported as valid (in meters),
* https://en.wikipedia.org/wiki/List_of_places_on_land_with_elevations_below_sea_level
* says that lowest land in the world is at -430 m, so let's use -500 m here.
*/
static const double kGCMinAlt = -500;
/*
* Matches "enum GClueAccuracyLevel" values, see:
* https://www.freedesktop.org/software/geoclue/docs/geoclue-gclue-enums.html#GClueAccuracyLevel
*/
enum class GCAccuracyLevel {
None = 0,
Country = 1,
City = 4,
Neighborhood = 5,
Street = 6,
Exact = 8,
};
/*
* Whether to reuse D-Bus proxies between uses of this provider.
* Usually a good thing, can be disabled for debug purposes.
*/
static const bool kGCReuseDBusProxy = true;
class GCLocProviderPriv final : public nsIGeolocationProvider,
public SupportsWeakPtr {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIGEOLOCATIONPROVIDER
GCLocProviderPriv();
void UpdateLastPosition();
private:
class LocationTimerCallback final : public nsITimerCallback, public nsINamed {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSITIMERCALLBACK
explicit LocationTimerCallback(GCLocProviderPriv* aParent)
: mParent(aParent) {}
NS_IMETHOD GetName(nsACString& aName) override {
aName.AssignLiteral("GCLocProvider::LocationTimerCallback");
return NS_OK;
}
private:
~LocationTimerCallback() = default;
WeakPtr<GCLocProviderPriv> mParent;
};
enum class Accuracy { Unset, Low, High };
// States:
// Uninit: The default / initial state, with no client proxy yet.
// Initing: Takes care of establishing the client connection (GetClient /
// ConnectClient / SetDesktopID).
// SettingAccuracy: Does SetAccuracy operation, knows it should just go idle
// after finishing it.
// SettingAccuracyForStart: Does SetAccuracy operation, knows it then needs
// to do a Start operation after finishing it.
// Idle: Fully initialized, but not running state (quiescent).
// Starting: Starts the client by calling the Start D-Bus method.
// Started: Normal running state.
// Stopping: Stops the client by calling the Stop D-Bus method, knows it
// should just go idle after finishing it.
// StoppingForRestart: Stops the client by calling the Stop D-Bus method as
// a part of a Stop -> Start sequence (with possibly
// an accuracy update between these method calls).
//
// Valid state transitions are:
// (any state) -> Uninit: Transition when a D-Bus call failed or
// provided invalid data.
//
// Watch() startup path:
// Uninit -> Initing: Transition after getting the very first Watch()
// request
// or any such request while not having the client proxy.
// Initing -> SettingAccuracyForStart: Transition after getting a successful
// SetDesktopID response.
// SettingAccuracyForStart -> Starting: Transition after getting a
// successful
// SetAccuracy response.
// Idle -> Starting: Transition after getting a Watch() request while in
// fully
// initialized, but not running state.
// SettingAccuracy -> SettingAccuracyForStart: Transition after getting a
// Watch()
// request in the middle of
// setting accuracy during idle
// status.
// Stopping -> StoppingForRestart: Transition after getting a Watch()
// request
// in the middle of doing a Stop D-Bus call
// for idle status.
// StoppingForRestart -> Starting: Transition after getting a successful
// Stop response as a part of a Stop ->
// Start sequence while the previously set
// accuracy is still correct.
// StoppingForRestart -> SettingAccuracyForStart: Transition after getting
// a successful Stop response
// as a part of a Stop ->
// Start sequence but the set
// accuracy needs updating.
// Starting -> Started: Transition after getting a successful Start
// response.
//
// Shutdown() path:
// (any state) -> Uninit: Transition when not reusing the client proxy for
// any reason.
// Started -> Stopping: Transition from normal running state when reusing
// the client proxy.
// SettingAccuracyForStart -> SettingAccuracy: Transition when doing
// a shutdown in the middle of
// setting accuracy for a start
// when reusing the client
// proxy.
// SettingAccuracy -> Idle: Transition after getting a successful
// SetAccuracy
// response.
// StoppingForRestart -> Stopping: Transition when doing shutdown
// in the middle of a Stop -> Start sequence
// when reusing the client proxy.
// Stopping -> Idle: Transition after getting a successful Stop response.
//
// SetHighAccuracy() path:
// Started -> StoppingForRestart: Transition when accuracy needs updating
// on a running client.
// (the rest of the flow in StoppingForRestart state is the same as when
// being in this state in the Watch() startup path)
enum class ClientState {
Uninit,
Initing,
SettingAccuracy,
SettingAccuracyForStart,
Idle,
Starting,
Started,
Stopping,
StoppingForRestart
};
~GCLocProviderPriv();
static bool AlwaysHighAccuracy();
void SetState(ClientState aNewState, const char* aNewStateStr);
void Update(nsIDOMGeoPosition* aPosition);
MOZ_CAN_RUN_SCRIPT void NotifyError(int aError);
MOZ_CAN_RUN_SCRIPT void DBusProxyError(const GError* aGError,
bool aResetManager = false);
MOZ_CAN_RUN_SCRIPT static void GetClientResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData);
void ConnectClient(const gchar* aClientPath);
MOZ_CAN_RUN_SCRIPT static void ConnectClientResponse(GObject* aObject,
GAsyncResult* aResult,
gpointer aUserData);
void SetDesktopID();
MOZ_CAN_RUN_SCRIPT static void SetDesktopIDResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData);
void SetAccuracy();
MOZ_CAN_RUN_SCRIPT static void SetAccuracyResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData);
void StartClient();
MOZ_CAN_RUN_SCRIPT static void StartClientResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData);
void StopClient(bool aForRestart);
MOZ_CAN_RUN_SCRIPT static void StopClientResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData);
void StopClientNoWait();
void MaybeRestartForAccuracy();
MOZ_CAN_RUN_SCRIPT static void GCManagerOwnerNotify(GObject* aObject,
GParamSpec* aPSpec,
gpointer aUserData);
static void GCClientSignal(GDBusProxy* aProxy, gchar* aSenderName,
gchar* aSignalName, GVariant* aParameters,
gpointer aUserData);
void ConnectLocation(const gchar* aLocationPath);
static bool GetLocationProperty(GDBusProxy* aProxyLocation,
const gchar* aName, double* aOut);
static void ConnectLocationResponse(GObject* aObject, GAsyncResult* aResult,
gpointer aUserData);
void SetLocationTimer();
void StopLocationTimer();
bool InDBusCall();
bool InDBusStoppingCall();
bool InDBusStoppedCall();
void DeleteManager();
void DoShutdown(bool aDeleteClient, bool aDeleteManager);
void DoShutdownClearCallback(bool aDestroying);
nsresult FallbackToMLS();
void StopMLSFallback();
void WatchStart();
Accuracy mAccuracyWanted = Accuracy::Unset;
Accuracy mAccuracySet = Accuracy::Unset;
RefPtr<GDBusProxy> mProxyManager;
RefPtr<GDBusProxy> mProxyClient;
RefPtr<GCancellable> mCancellable;
nsCOMPtr<nsIGeolocationUpdate> mCallback;
ClientState mClientState = ClientState::Uninit;
RefPtr<nsIDOMGeoPosition> mLastPosition;
RefPtr<nsITimer> mLocationTimer;
RefPtr<MLSFallback> mMLSFallback;
};
//
// GCLocProviderPriv
//
#define GCLP_SETSTATE(this, state) this->SetState(ClientState::state, #state)
GCLocProviderPriv::GCLocProviderPriv() {
if (AlwaysHighAccuracy()) {
mAccuracyWanted = Accuracy::High;
} else {
mAccuracyWanted = Accuracy::Low;
}
}
GCLocProviderPriv::~GCLocProviderPriv() { DoShutdownClearCallback(true); }
bool GCLocProviderPriv::AlwaysHighAccuracy() {
return StaticPrefs::geo_provider_geoclue_always_high_accuracy();
}
void GCLocProviderPriv::SetState(ClientState aNewState,
const char* aNewStateStr) {
if (mClientState == aNewState) {
return;
}
GCL_LOG(Debug, "changing state to %s", aNewStateStr);
mClientState = aNewState;
}
void GCLocProviderPriv::Update(nsIDOMGeoPosition* aPosition) {
if (!mCallback) {
return;
}
mCallback->Update(aPosition);
}
void GCLocProviderPriv::UpdateLastPosition() {
MOZ_DIAGNOSTIC_ASSERT(mLastPosition, "No last position to update");
StopLocationTimer();
Update(mLastPosition);
}
nsresult GCLocProviderPriv::FallbackToMLS() {
GCL_LOG(Debug, "trying to fall back to MLS");
StopMLSFallback();
RefPtr fallback = new MLSFallback(0);
MOZ_TRY(fallback->Startup(mCallback));
GCL_LOG(Debug, "Started up MLS fallback");
mMLSFallback = std::move(fallback);
return NS_OK;
}
void GCLocProviderPriv::StopMLSFallback() {
if (!mMLSFallback) {
return;
}
GCL_LOG(Debug, "Clearing MLS fallback");
if (mMLSFallback) {
mMLSFallback->Shutdown();
mMLSFallback = nullptr;
}
}
void GCLocProviderPriv::NotifyError(int aError) {
if (!mCallback) {
return;
}
// We errored out, try to fall back to MLS.
if (NS_SUCCEEDED(FallbackToMLS())) {
return;
}
nsCOMPtr callback = mCallback;
callback->NotifyError(aError);
}
void GCLocProviderPriv::DBusProxyError(const GError* aGError,
bool aResetManager) {
// that G_DBUS_ERROR below is actually a function call, not a constant
GQuark gdbusDomain = G_DBUS_ERROR;
int error = GeolocationPositionError_Binding::POSITION_UNAVAILABLE;
if (aGError) {
if (g_error_matches(aGError, gdbusDomain, G_DBUS_ERROR_TIMEOUT) ||
g_error_matches(aGError, gdbusDomain, G_DBUS_ERROR_TIMED_OUT)) {
error = GeolocationPositionError_Binding::TIMEOUT;
} else if (g_error_matches(aGError, gdbusDomain,
G_DBUS_ERROR_LIMITS_EXCEEDED) ||
g_error_matches(aGError, gdbusDomain,
G_DBUS_ERROR_ACCESS_DENIED) ||
g_error_matches(aGError, gdbusDomain,
G_DBUS_ERROR_AUTH_FAILED)) {
error = GeolocationPositionError_Binding::PERMISSION_DENIED;
}
}
DoShutdown(true, aResetManager);
NotifyError(error);
}
void GCLocProviderPriv::GetClientResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData) {
GUniquePtr<GError> error;
RefPtr<GVariant> variant = dont_AddRef(
g_dbus_proxy_call_finish(aProxy, aResult, getter_Transfers(error)));
if (!variant) {
// if cancelled |self| might no longer be there
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
GCL_LOG(Error, "Failed to get client: %s\n", error->message);
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
self->DBusProxyError(error.get(), true);
}
return;
}
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
MOZ_DIAGNOSTIC_ASSERT(self->mClientState == ClientState::Initing,
"Client in a wrong state");
auto signalError = MakeScopeExit([&]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
self->DBusProxyError(nullptr, true);
});
if (!g_variant_is_of_type(variant, G_VARIANT_TYPE_TUPLE)) {
GCL_LOG(Error, "Unexpected get client call return type: %s\n",
g_variant_get_type_string(variant));
return;
}
if (g_variant_n_children(variant) < 1) {
GCL_LOG(Error,
"Not enough params in get client call return: %" G_GSIZE_FORMAT
"\n",
g_variant_n_children(variant));
return;
}
variant = dont_AddRef(g_variant_get_child_value(variant, 0));
if (!g_variant_is_of_type(variant, G_VARIANT_TYPE_OBJECT_PATH)) {
GCL_LOG(Error, "Unexpected get client call return type inside tuple: %s\n",
g_variant_get_type_string(variant));
return;
}
const gchar* clientPath = g_variant_get_string(variant, nullptr);
GCL_LOG(Debug, "Client path: %s\n", clientPath);
signalError.release();
self->ConnectClient(clientPath);
}
void GCLocProviderPriv::ConnectClient(const gchar* aClientPath) {
MOZ_DIAGNOSTIC_ASSERT(mClientState == ClientState::Initing,
"Client in a wrong state");
MOZ_ASSERT(mCancellable, "Watch() wasn't successfully called");
g_dbus_proxy_new_for_bus(
G_BUS_TYPE_SYSTEM, G_DBUS_PROXY_FLAGS_NONE, nullptr, kGeoclueBusName,
aClientPath, kGCClientInterface, mCancellable,
reinterpret_cast<GAsyncReadyCallback>(ConnectClientResponse), this);
}
void GCLocProviderPriv::ConnectClientResponse(GObject* aObject,
GAsyncResult* aResult,
gpointer aUserData) {
GUniquePtr<GError> error;
RefPtr<GDBusProxy> proxyClient =
dont_AddRef(g_dbus_proxy_new_finish(aResult, getter_Transfers(error)));
if (!proxyClient) {
// if cancelled |self| might no longer be there
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
GCL_LOG(Error, "Failed to connect to client: %s\n", error->message);
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
self->DBusProxyError(error.get());
}
return;
}
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
self->mProxyClient = std::move(proxyClient);
MOZ_DIAGNOSTIC_ASSERT(self->mClientState == ClientState::Initing,
"Client in a wrong state");
GCL_LOG(Info, "Client interface connected\n");
g_signal_connect(self->mProxyClient, "g-signal", G_CALLBACK(GCClientSignal),
self);
self->SetDesktopID();
}
void GCLocProviderPriv::SetDesktopID() {
MOZ_DIAGNOSTIC_ASSERT(mClientState == ClientState::Initing,
"Client in a wrong state");
MOZ_DIAGNOSTIC_ASSERT(mProxyClient && mCancellable,
"Watch() wasn't successfully called");
nsAutoCString appName;
gAppData->GetDBusAppName(appName);
g_dbus_proxy_call(mProxyClient, kDBPropertySetMethod,
g_variant_new("(ssv)", kGCClientInterface, "DesktopId",
g_variant_new_string(appName.get())),
G_DBUS_CALL_FLAGS_NONE, -1, mCancellable,
reinterpret_cast<GAsyncReadyCallback>(SetDesktopIDResponse),
this);
}
void GCLocProviderPriv::SetDesktopIDResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData) {
GUniquePtr<GError> error;
RefPtr<GVariant> variant = dont_AddRef(
g_dbus_proxy_call_finish(aProxy, aResult, getter_Transfers(error)));
if (!variant) {
// if cancelled |self| might no longer be there
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
GCL_LOG(Error, "Failed to set DesktopId: %s\n", error->message);
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
self->DBusProxyError(error.get());
}
return;
}
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
MOZ_DIAGNOSTIC_ASSERT(self->mClientState == ClientState::Initing,
"Client in a wrong state");
GCLP_SETSTATE(self, Idle);
self->SetAccuracy();
}
void GCLocProviderPriv::SetAccuracy() {
MOZ_DIAGNOSTIC_ASSERT(mClientState == ClientState::Idle,
"Client in a wrong state");
MOZ_DIAGNOSTIC_ASSERT(mProxyClient && mCancellable,
"Watch() wasn't successfully called");
MOZ_ASSERT(mAccuracyWanted != Accuracy::Unset, "Invalid accuracy");
guint32 accuracy;
if (mAccuracyWanted == Accuracy::High) {
accuracy = (guint32)GCAccuracyLevel::Exact;
} else {
accuracy = (guint32)GCAccuracyLevel::City;
}
mAccuracySet = mAccuracyWanted;
GCLP_SETSTATE(this, SettingAccuracyForStart);
g_dbus_proxy_call(
mProxyClient, kDBPropertySetMethod,
g_variant_new("(ssv)", kGCClientInterface, "RequestedAccuracyLevel",
g_variant_new_uint32(accuracy)),
G_DBUS_CALL_FLAGS_NONE, -1, mCancellable,
reinterpret_cast<GAsyncReadyCallback>(SetAccuracyResponse), this);
}
void GCLocProviderPriv::SetAccuracyResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData) {
GUniquePtr<GError> error;
RefPtr<GVariant> variant = dont_AddRef(
g_dbus_proxy_call_finish(aProxy, aResult, getter_Transfers(error)));
if (!variant) {
// if cancelled |self| might no longer be there
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
GCL_LOG(Error, "Failed to set requested accuracy level: %s\n",
error->message);
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
self->DBusProxyError(error.get());
}
return;
}
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
MOZ_DIAGNOSTIC_ASSERT(
self->mClientState == ClientState::SettingAccuracyForStart ||
self->mClientState == ClientState::SettingAccuracy,
"Client in a wrong state");
bool wantStart = self->mClientState == ClientState::SettingAccuracyForStart;
GCLP_SETSTATE(self, Idle);
if (wantStart) {
self->StartClient();
}
}
void GCLocProviderPriv::StartClient() {
MOZ_DIAGNOSTIC_ASSERT(mClientState == ClientState::Idle,
"Client in a wrong state");
MOZ_DIAGNOSTIC_ASSERT(mProxyClient && mCancellable,
"Watch() wasn't successfully called");
GCLP_SETSTATE(this, Starting);
g_dbus_proxy_call(
mProxyClient, "Start", nullptr, G_DBUS_CALL_FLAGS_NONE, -1, mCancellable,
reinterpret_cast<GAsyncReadyCallback>(StartClientResponse), this);
}
void GCLocProviderPriv::StartClientResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData) {
GUniquePtr<GError> error;
RefPtr<GVariant> variant = dont_AddRef(
g_dbus_proxy_call_finish(aProxy, aResult, getter_Transfers(error)));
if (!variant) {
// if cancelled |self| might no longer be there
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
GCL_LOG(Error, "Failed to start client: %s\n", error->message);
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
/*
* A workaround for
* https://gitlab.freedesktop.org/geoclue/geoclue/-/issues/143 We need to
* get a new client instance once the agent finally connects to the
* Geoclue service, otherwise every Start request on the old client
* interface will be denied. We need to reconnect to the Manager interface
* to achieve this since otherwise GetClient call will simply return the
* old client instance.
*/
bool resetManager = g_error_matches(error.get(), G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED);
self->DBusProxyError(error.get(), resetManager);
}
return;
}
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
MOZ_DIAGNOSTIC_ASSERT(self->mClientState == ClientState::Starting,
"Client in a wrong state");
GCLP_SETSTATE(self, Started);
self->MaybeRestartForAccuracy();
}
void GCLocProviderPriv::StopClient(bool aForRestart) {
MOZ_DIAGNOSTIC_ASSERT(mClientState == ClientState::Started,
"Client in a wrong state");
MOZ_DIAGNOSTIC_ASSERT(mProxyClient && mCancellable,
"Watch() wasn't successfully called");
if (aForRestart) {
GCLP_SETSTATE(this, StoppingForRestart);
} else {
GCLP_SETSTATE(this, Stopping);
}
g_dbus_proxy_call(
mProxyClient, "Stop", nullptr, G_DBUS_CALL_FLAGS_NONE, -1, mCancellable,
reinterpret_cast<GAsyncReadyCallback>(StopClientResponse), this);
}
void GCLocProviderPriv::StopClientResponse(GDBusProxy* aProxy,
GAsyncResult* aResult,
gpointer aUserData) {
GUniquePtr<GError> error;
RefPtr<GVariant> variant = dont_AddRef(
g_dbus_proxy_call_finish(aProxy, aResult, getter_Transfers(error)));
if (!variant) {
// if cancelled |self| might no longer be there
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
GCL_LOG(Error, "Failed to stop client: %s\n", error->message);
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
self->DBusProxyError(error.get());
}
return;
}
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
MOZ_DIAGNOSTIC_ASSERT(self->InDBusStoppingCall(), "Client in a wrong state");
bool wantRestart = self->mClientState == ClientState::StoppingForRestart;
GCLP_SETSTATE(self, Idle);
if (!wantRestart) {
return;
}
if (self->mAccuracyWanted != self->mAccuracySet) {
self->SetAccuracy();
} else {
self->StartClient();
}
}
void GCLocProviderPriv::StopClientNoWait() {
MOZ_DIAGNOSTIC_ASSERT(mProxyClient, "Watch() wasn't successfully called");
g_dbus_proxy_call(mProxyClient, "Stop", nullptr, G_DBUS_CALL_FLAGS_NONE, -1,
nullptr, nullptr, nullptr);
}
void GCLocProviderPriv::MaybeRestartForAccuracy() {
if (mAccuracyWanted == mAccuracySet) {
return;
}
if (mClientState != ClientState::Started) {
return;
}
// Setting a new accuracy requires restarting the client
StopClient(true);
}
void GCLocProviderPriv::GCManagerOwnerNotify(GObject* aObject,
GParamSpec* aPSpec,
gpointer aUserData) {
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
GUniquePtr<gchar> managerOwner(
g_dbus_proxy_get_name_owner(self->mProxyManager));
if (!managerOwner) {
GCL_LOG(Info, "The Manager interface has lost its owner\n");
self->DBusProxyError(nullptr, true);
}
}
void GCLocProviderPriv::GCClientSignal(GDBusProxy* aProxy, gchar* aSenderName,
gchar* aSignalName,
GVariant* aParameters,
gpointer aUserData) {
if (g_strcmp0(aSignalName, "LocationUpdated")) {
return;
}
if (!g_variant_is_of_type(aParameters, G_VARIANT_TYPE_TUPLE)) {
GCL_LOG(Error, "Unexpected location updated signal params type: %s\n",
g_variant_get_type_string(aParameters));
return;
}
if (g_variant_n_children(aParameters) < 2) {
GCL_LOG(Error,
"Not enough params in location updated signal: %" G_GSIZE_FORMAT
"\n",
g_variant_n_children(aParameters));
return;
}
RefPtr<GVariant> variant =
dont_AddRef(g_variant_get_child_value(aParameters, 1));
if (!g_variant_is_of_type(variant, G_VARIANT_TYPE_OBJECT_PATH)) {
GCL_LOG(Error,
"Unexpected location updated signal new location path type: %s\n",
g_variant_get_type_string(variant));
return;
}
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
const gchar* locationPath = g_variant_get_string(variant, nullptr);
GCL_LOG(Verbose, "New location path: %s\n", locationPath);
self->ConnectLocation(locationPath);
}
void GCLocProviderPriv::ConnectLocation(const gchar* aLocationPath) {
MOZ_ASSERT(mCancellable, "Startup() wasn't successfully called");
g_dbus_proxy_new_for_bus(
G_BUS_TYPE_SYSTEM, G_DBUS_PROXY_FLAGS_NONE, nullptr, kGeoclueBusName,
aLocationPath, kGCLocationInterface, mCancellable,
reinterpret_cast<GAsyncReadyCallback>(ConnectLocationResponse), this);
}
bool GCLocProviderPriv::GetLocationProperty(GDBusProxy* aProxyLocation,
const gchar* aName, double* aOut) {
RefPtr<GVariant> property =
dont_AddRef(g_dbus_proxy_get_cached_property(aProxyLocation, aName));
if (!g_variant_is_of_type(property, G_VARIANT_TYPE_DOUBLE)) {
GCL_LOG(Error, "Unexpected location property %s type: %s\n", aName,
g_variant_get_type_string(property));
return false;
}
*aOut = g_variant_get_double(property);
return true;
}
void GCLocProviderPriv::ConnectLocationResponse(GObject* aObject,
GAsyncResult* aResult,
gpointer aUserData) {
GUniquePtr<GError> error;
RefPtr<GDBusProxy> proxyLocation =
dont_AddRef(g_dbus_proxy_new_finish(aResult, getter_Transfers(error)));
if (!proxyLocation) {
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
GCL_LOG(Warning, "Failed to connect to location: %s\n", error->message);
}
return;
}
RefPtr self = static_cast<GCLocProviderPriv*>(aUserData);
/*
* nsGeoPositionCoords will convert NaNs to null for optional properties of
* the JavaScript Coordinates object.
*/
double lat = UnspecifiedNaN<double>();
double lon = UnspecifiedNaN<double>();
double alt = UnspecifiedNaN<double>();
double hError = UnspecifiedNaN<double>();
const double vError = UnspecifiedNaN<double>();
double heading = UnspecifiedNaN<double>();
double speed = UnspecifiedNaN<double>();
struct {
const gchar* name;
double* out;
} props[] = {
{"Latitude", &lat}, {"Longitude", &lon}, {"Altitude", &alt},
{"Accuracy", &hError}, {"Heading", &heading}, {"Speed", &speed},
};
for (auto& prop : props) {
if (!GetLocationProperty(proxyLocation, prop.name, prop.out)) {
return;
}
}
if (alt < kGCMinAlt) {
alt = UnspecifiedNaN<double>();
}
if (speed < 0) {
speed = UnspecifiedNaN<double>();
}
if (heading < 0 || std::isnan(speed) || speed == 0) {
heading = UnspecifiedNaN<double>();
}
GCL_LOG(Info, "New location: %f %f +-%fm @ %gm; hdg %f spd %fm/s\n", lat, lon,
hError, alt, heading, speed);
self->mLastPosition =
new nsGeoPosition(lat, lon, alt, hError, vError, heading, speed,
PR_Now() / PR_USEC_PER_MSEC);
self->UpdateLastPosition();
}
void GCLocProviderPriv::SetLocationTimer() {
MOZ_DIAGNOSTIC_ASSERT(mLastPosition, "no last position to report");
StopLocationTimer();
RefPtr<LocationTimerCallback> timerCallback = new LocationTimerCallback(this);
NS_NewTimerWithCallback(getter_AddRefs(mLocationTimer), timerCallback, 1000,
nsITimer::TYPE_ONE_SHOT);
}
void GCLocProviderPriv::StopLocationTimer() {
if (!mLocationTimer) {
return;
}
mLocationTimer->Cancel();
mLocationTimer = nullptr;
}
// Did we made some D-Bus call and are still waiting for its response?
bool GCLocProviderPriv::InDBusCall() {
return mClientState == ClientState::Initing ||
mClientState == ClientState::SettingAccuracy ||
mClientState == ClientState::SettingAccuracyForStart ||
mClientState == ClientState::Starting ||
mClientState == ClientState::Stopping ||
mClientState == ClientState::StoppingForRestart;
}
bool GCLocProviderPriv::InDBusStoppingCall() {
return mClientState == ClientState::Stopping ||
mClientState == ClientState::StoppingForRestart;
}
/*
* Did we made some D-Bus call while stopped and
* are still waiting for its response?
*/
bool GCLocProviderPriv::InDBusStoppedCall() {
return mClientState == ClientState::SettingAccuracy ||
mClientState == ClientState::SettingAccuracyForStart;
}
void GCLocProviderPriv::DeleteManager() {
if (!mProxyManager) {
return;
}
g_signal_handlers_disconnect_matched(mProxyManager, G_SIGNAL_MATCH_DATA, 0, 0,
nullptr, nullptr, this);
mProxyManager = nullptr;
}
void GCLocProviderPriv::DoShutdown(bool aDeleteClient, bool aDeleteManager) {
MOZ_DIAGNOSTIC_ASSERT(
!aDeleteManager || aDeleteClient,
"deleting manager proxy requires deleting client one, too");
// Invalidate the cached last position
StopLocationTimer();
mLastPosition = nullptr;
/*
* Do we need to delete the D-Bus proxy (or proxies)?
* Either because that's what our caller wanted, or because we are set to
* never reuse them, or because we are in a middle of some D-Bus call while
* having the service running (and so not being able to issue an immediate
* Stop call).
*/
if (aDeleteClient || !kGCReuseDBusProxy ||
(InDBusCall() && !InDBusStoppingCall() && !InDBusStoppedCall())) {
if (mClientState == ClientState::Started) {
StopClientNoWait();
GCLP_SETSTATE(this, Idle);
}
if (mProxyClient) {
g_signal_handlers_disconnect_matched(mProxyClient, G_SIGNAL_MATCH_DATA, 0,
0, nullptr, nullptr, this);
}
if (mCancellable) {
g_cancellable_cancel(mCancellable);
mCancellable = nullptr;
}
mProxyClient = nullptr;
if (aDeleteManager || !kGCReuseDBusProxy) {
DeleteManager();
}
GCLP_SETSTATE(this, Uninit);
} else if (mClientState == ClientState::Started) {
StopClient(false);
} else if (mClientState == ClientState::SettingAccuracyForStart) {
GCLP_SETSTATE(this, SettingAccuracy);
} else if (mClientState == ClientState::StoppingForRestart) {
GCLP_SETSTATE(this, Stopping);
}
}
void GCLocProviderPriv::DoShutdownClearCallback(bool aDestroying) {
mCallback = nullptr;
StopMLSFallback();
DoShutdown(aDestroying, aDestroying);
}
NS_IMPL_ISUPPORTS(GCLocProviderPriv, nsIGeolocationProvider)
// nsIGeolocationProvider
//
/*
* The Startup() method should only succeed if Geoclue is available on D-Bus
* so it can be used for determining whether to continue with this geolocation
* provider in Geolocation.cpp
*/
NS_IMETHODIMP
GCLocProviderPriv::Startup() {
if (mProxyManager) {
return NS_OK;
}
MOZ_DIAGNOSTIC_ASSERT(mClientState == ClientState::Uninit,
"Client in a initialized state but no manager");
GUniquePtr<GError> error;
mProxyManager = dont_AddRef(g_dbus_proxy_new_for_bus_sync(
G_BUS_TYPE_SYSTEM, G_DBUS_PROXY_FLAGS_NONE, nullptr, kGeoclueBusName,
kGCManagerPath, kGCManagerInterface, nullptr, getter_Transfers(error)));
if (!mProxyManager) {
GCL_LOG(Info, "Cannot connect to the Manager interface: %s\n",
error->message);
return NS_ERROR_FAILURE;
}
g_signal_connect(mProxyManager, "notify::g-name-owner",
G_CALLBACK(GCManagerOwnerNotify), this);
GUniquePtr<gchar> managerOwner(g_dbus_proxy_get_name_owner(mProxyManager));
if (!managerOwner) {
GCL_LOG(Info, "The Manager interface has no owner\n");
DeleteManager();
return NS_ERROR_FAILURE;
}
GCL_LOG(Info, "Manager interface connected successfully\n");
return NS_OK;
}
void GCLocProviderPriv::WatchStart() {
if (mClientState == ClientState::Idle) {
StartClient();
} else if (mClientState == ClientState::Started) {
if (mLastPosition && !mLocationTimer) {
GCL_LOG(Verbose,
"Will report the existing location if new one doesn't come up\n");
SetLocationTimer();
}
} else if (mClientState == ClientState::SettingAccuracy) {
GCLP_SETSTATE(this, SettingAccuracyForStart);
} else if (mClientState == ClientState::Stopping) {
GCLP_SETSTATE(this, StoppingForRestart);
}
}
NS_IMETHODIMP
GCLocProviderPriv::Watch(nsIGeolocationUpdate* aCallback) {
mCallback = aCallback;
if (!mCancellable) {
mCancellable = dont_AddRef(g_cancellable_new());
}
if (mClientState != ClientState::Uninit) {
WatchStart();
return NS_OK;
}
if (!mProxyManager) {
GCL_LOG(Debug, "watch request falling back to MLS");
return FallbackToMLS();
}
StopMLSFallback();
GCLP_SETSTATE(this, Initing);
g_dbus_proxy_call(mProxyManager, "GetClient", nullptr, G_DBUS_CALL_FLAGS_NONE,
-1, mCancellable,
reinterpret_cast<GAsyncReadyCallback>(GetClientResponse),
this);
return NS_OK;
}
NS_IMETHODIMP
GCLocProviderPriv::Shutdown() {
DoShutdownClearCallback(false);
return NS_OK;
}
NS_IMETHODIMP
GCLocProviderPriv::SetHighAccuracy(bool aHigh) {
GCL_LOG(Verbose, "Want %s accuracy\n", aHigh ? "high" : "low");
if (!aHigh && AlwaysHighAccuracy()) {
GCL_LOG(Verbose, "Forcing high accuracy due to pref\n");
aHigh = true;
}
mAccuracyWanted = aHigh ? Accuracy::High : Accuracy::Low;
MaybeRestartForAccuracy();
return NS_OK;
}
NS_IMPL_ISUPPORTS(GCLocProviderPriv::LocationTimerCallback, nsITimerCallback,
nsINamed)
NS_IMETHODIMP
GCLocProviderPriv::LocationTimerCallback::Notify(nsITimer* aTimer) {
if (mParent) {
RefPtr<GCLocProviderPriv> parent(mParent);
parent->UpdateLastPosition();
}
return NS_OK;
}
GeoclueLocationProvider::GeoclueLocationProvider() {
mPriv = new GCLocProviderPriv;
}
// nsISupports
//
NS_IMPL_ISUPPORTS(GeoclueLocationProvider, nsIGeolocationProvider)
// nsIGeolocationProvider
//
NS_IMETHODIMP
GeoclueLocationProvider::Startup() { return mPriv->Startup(); }
NS_IMETHODIMP
GeoclueLocationProvider::Watch(nsIGeolocationUpdate* aCallback) {
return mPriv->Watch(aCallback);
}
NS_IMETHODIMP
GeoclueLocationProvider::Shutdown() { return mPriv->Shutdown(); }
NS_IMETHODIMP
GeoclueLocationProvider::SetHighAccuracy(bool aHigh) {
return mPriv->SetHighAccuracy(aHigh);
}
} // namespace mozilla::dom
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