gecko-dev/dom/geolocation/nsGeolocationSettings.cpp

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C++

/* -*- 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 "nsXULAppAPI.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/Telemetry.h"
#include "nsISettingsService.h"
#include "nsGeolocation.h"
#include "nsGeolocationSettings.h"
#include "nsDOMClassInfoID.h"
#include "nsComponentManagerUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsContentUtils.h"
#include "nsContentPermissionHelper.h"
#include "nsIDocument.h"
#include "nsIObserverService.h"
#include "nsPIDOMWindow.h"
#include "nsThreadUtils.h"
#include "mozilla/Services.h"
#include "mozilla/unused.h"
#include "mozilla/Preferences.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/dom/PermissionMessageUtils.h"
#include "mozilla/dom/SettingChangeNotificationBinding.h"
#include "nsJSUtils.h"
#include "prdtoa.h"
#define GEO_ALA_TYPE_VALUE_PRECISE "precise"
#define GEO_ALA_TYPE_VALUE_APPROX "blur"
#define GEO_ALA_TYPE_VALUE_FIXED "user-defined"
#define GEO_ALA_TYPE_VALUE_NONE "no-location"
using mozilla::Unused;
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_ISUPPORTS(nsGeolocationSettings, nsIObserver)
StaticRefPtr<nsGeolocationSettings> nsGeolocationSettings::sSettings;
already_AddRefed<nsGeolocationSettings>
nsGeolocationSettings::GetGeolocationSettings()
{
// this singleton is only needed in the parent process...
if (XRE_IsContentProcess()) {
return nullptr;
}
RefPtr<nsGeolocationSettings> result;
if (nsGeolocationSettings::sSettings) {
result = nsGeolocationSettings::sSettings;
return result.forget();
}
result = new nsGeolocationSettings();
if (NS_FAILED(result->Init())) {
return nullptr;
}
ClearOnShutdown(&nsGeolocationSettings::sSettings);
nsGeolocationSettings::sSettings = result;
return result.forget();
}
nsresult nsGeolocationSettings::Init()
{
// query for the current settings...
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (!obs) {
return NS_ERROR_FAILURE;
}
// hook up observers
obs->AddObserver(this, "quit-application", false);
obs->AddObserver(this, "mozsettings-changed", false);
return NS_OK;
}
NS_IMETHODIMP
nsGeolocationSettings::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData)
{
// remove observers
if (!strcmp("quit-application", aTopic)) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->RemoveObserver(this, "quit-application");
obs->RemoveObserver(this, "mozsettings-changed");
}
return NS_OK;
}
if (!strcmp("mozsettings-changed", aTopic)) {
HandleMozsettingsChanged(aSubject);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
GeolocationSetting
nsGeolocationSettings::LookupGeolocationSetting(int32_t aWatchID)
{
nsCString *origin;
if (!mCurrentWatches.Get(aWatchID, &origin) || !origin) {
return mGlobalSetting;
}
// if there is no per-app setting for the given origin, this will
// set gb == nullptr
GeolocationSetting const * const gb =
mPerOriginSettings.Get(NS_ConvertUTF8toUTF16(*origin));
// return a copy of the per-app or global settings
return gb ? *gb : mGlobalSetting;
}
void
nsGeolocationSettings::HandleGeolocationSettingsChange(const nsAString& aKey,
const JS::Value& aVal)
{
if (aKey.EqualsASCII(GEO_ALA_ENABLED)) {
HandleGeolocationAlaEnabledChange(aVal);
} else if (aKey.EqualsASCII(GEO_ALA_TYPE)) {
mGlobalSetting.HandleTypeChange(aVal);
#ifdef MOZ_APPROX_LOCATION
} else if (aKey.EqualsASCII(GEO_ALA_APPROX_DISTANCE)) {
mGlobalSetting.HandleApproxDistanceChange(aVal);
#endif
} else if (aKey.EqualsASCII(GEO_ALA_FIXED_COORDS)) {
mGlobalSetting.HandleFixedCoordsChange(aVal);
} else if (aKey.EqualsASCII(GEO_ALA_APP_SETTINGS)) {
HandleGeolocationPerOriginSettingsChange(aVal);
} else if (aKey.EqualsASCII(GEO_ALA_ALWAYS_PRECISE)) {
HandleGeolocationAlwaysPreciseChange(aVal);
}
}
void
nsGeolocationSettings::HandleMozsettingsChanged(nsISupports* aSubject)
{
MOZ_ASSERT(NS_IsMainThread());
RootedDictionary<SettingChangeNotification> setting(nsContentUtils::RootingCx());
if (!WrappedJSToDictionary(aSubject, setting)) {
return;
}
GPSLOG("mozsettings changed: %s", NS_ConvertUTF16toUTF8(setting.mKey).get());
// and handle the geolocation settings change...
HandleGeolocationSettingsChange(setting.mKey, setting.mValue);
}
void
nsGeolocationSettings::HandleGeolocationSettingsError(const nsAString& aName)
{
if (aName.EqualsASCII(GEO_ALA_ENABLED)) {
GPSLOG("Unable to get value for '" GEO_ALA_ENABLED "'");
} else if (aName.EqualsASCII(GEO_ALA_TYPE)) {
GPSLOG("Unable to get value for '" GEO_ALA_TYPE "'");
#ifdef MOZ_APPROX_LOCATION
} else if (aName.EqualsASCII(GEO_ALA_APPROX_DISTANCE)) {
GPSLOG("Unable to get value for '" GEO_ALA_APPROX_DISTANCE "'");
#endif
} else if (aName.EqualsASCII(GEO_ALA_FIXED_COORDS)) {
GPSLOG("Unable to get value for '" GEO_ALA_FIXED_COORDS "'");
} else if (aName.EqualsASCII(GEO_ALA_APP_SETTINGS)) {
GPSLOG("Unable to get value for '" GEO_ALA_APP_SETTINGS "'");
} else if (aName.EqualsASCII(GEO_ALA_ALWAYS_PRECISE)) {
GPSLOG("Unable to get value for '" GEO_ALA_ALWAYS_PRECISE "'");
}
}
void
nsGeolocationSettings::PutWatchOrigin(int32_t aWatchID,
const nsCString& aOrigin)
{
if (aWatchID < 0) {
return;
}
GPSLOG("mapping watch ID %d to origin %s", aWatchID, aOrigin.get());
mCurrentWatches.Put(static_cast<uint32_t>(aWatchID), new nsCString(aOrigin));
}
void
nsGeolocationSettings::RemoveWatchOrigin(int32_t aWatchID)
{
GPSLOG("unmapping watch ID %d", aWatchID);
mCurrentWatches.Remove(static_cast<uint32_t>(aWatchID));
}
void
nsGeolocationSettings::GetWatchOrigin(int32_t aWatchID, nsCString& aOrigin)
{
nsCString *str;
if (!mCurrentWatches.Get(aWatchID, &str) || !str) {
return;
}
aOrigin = *str;
GPSLOG("returning origin %s for watch ID %d", aOrigin.get(), aWatchID);
}
void
nsGeolocationSettings::HandleGeolocationAlaEnabledChange(const JS::Value& aVal)
{
if (!aVal.isBoolean()) {
return;
}
mAlaEnabled = aVal.toBoolean();
}
void
nsGeolocationSettings::HandleGeolocationPerOriginSettingsChange(const JS::Value& aVal)
{
MOZ_ASSERT(NS_IsMainThread());
if (!aVal.isObject()) {
return;
}
// clear the hash table
mPerOriginSettings.Clear();
// root the object and get the global
JS::Rooted<JSObject*> obj(nsContentUtils::RootingCx(), &aVal.toObject());
MOZ_ASSERT(obj);
nsIGlobalObject* global = xpc::NativeGlobal(obj);
NS_ENSURE_TRUE_VOID(global && global->GetGlobalJSObject());
// because the spec requires calling getters when enumerating the key of a
// dictionary
AutoEntryScript aes(global, "geolocation.app_settings enumeration");
JSContext *cx = aes.cx();
JS::Rooted<JS::IdVector> ids(cx, JS::IdVector(cx));
// if we get no ids then the exception list is empty and we can return here.
if (!JS_Enumerate(cx, obj, &ids)) {
return;
}
// go through all of the objects in the exceptions dictionary
for (size_t i = 0; i < ids.length(); i++) {
JS::RootedId id(cx);
id = ids[i];
// if it is an app that is always precise, skip it
nsAutoJSString origin;
if (!origin.init(cx, id)) {
JS_ClearPendingException(cx); // catch and ignore any exceptions
continue;
}
if (mAlwaysPreciseApps.Contains(origin)) {
continue;
}
// get the app setting object
JS::RootedValue propertyValue(cx);
if (!JS_GetPropertyById(cx, obj, id, &propertyValue)) {
JS_ClearPendingException(cx); // catch and ignore any exceptions
continue;
}
JS::RootedObject settingObj(cx, &propertyValue.toObject());
GeolocationSetting *settings = new GeolocationSetting(origin);
GPSLOG("adding exception for %s", NS_ConvertUTF16toUTF8(origin).get());
// get the geolocation type
JS::RootedValue fm(cx);
if (JS_GetProperty(cx, settingObj, "type", &fm)) {
settings->HandleTypeChange(fm);
} else {
JS_ClearPendingException(cx); // catch and ignore any exceptions
}
#ifdef MOZ_APPROX_LOCATION
// get the approximate distance if there is one
JS::RootedValue distance(cx);
if (JS_GetProperty(cx, settingObj, "distance", &distance)) {
settings->HandleApproxDistanceChange(distance);
} else {
JS_ClearPendingException(cx); // catch and ignore any exceptions
}
#endif
// get and parse the coords, if any
JS::RootedValue coords(cx);
if (JS_GetProperty(cx, settingObj, "coords", &coords)) {
settings->HandleFixedCoordsChange(coords);
} else {
JS_ClearPendingException(cx); // catch and ignore any exceptions
}
// add the per-app setting object to the hashtable
mPerOriginSettings.Put(origin, settings);
}
}
void
nsGeolocationSettings::HandleGeolocationAlwaysPreciseChange(const JS::Value& aVal)
{
if (!aVal.isObject()) {
return;
}
// clear the list of apps that are always precise
mAlwaysPreciseApps.Clear();
// root the object and get the global
JS::Rooted<JSObject*> obj(nsContentUtils::RootingCx(), &aVal.toObject());
MOZ_ASSERT(obj);
nsIGlobalObject* global = xpc::NativeGlobal(obj);
NS_ENSURE_TRUE_VOID(global && global->GetGlobalJSObject());
// the spec requires calling getters when accessing array by index
AutoEntryScript aes(global, "geolocation.always_precise indexing");
JSContext *cx = aes.cx();
bool isArray;
if (!JS_IsArrayObject(cx, obj, &isArray) || !isArray) {
return;
}
uint32_t length;
if (!JS_GetArrayLength(cx, obj, &length)) {
return;
}
// process the list of apps...
for (uint32_t i = 0; i < length; ++i) {
JS::RootedValue value(cx);
if (!JS_GetElement(cx, obj, i, &value) || !value.isString()) {
JS_ClearPendingException(cx); // catch and ignore any exceptions
continue;
}
nsAutoJSString origin;
if (!origin.init(cx, value)) {
JS_ClearPendingException(cx); // catch and ignore any exceptions
continue;
}
GPSLOG("adding always precise for %s", NS_ConvertUTF16toUTF8(origin).get());
// add the origin to the list of apps that will always receive
// precise location information
mAlwaysPreciseApps.AppendElement(origin);
}
}
void
GeolocationSetting::HandleTypeChange(const JS::Value& aVal)
{
nsAutoJSString str;
if (!str.init(aVal)) {
return;
}
GeolocationFuzzMethod fm = GEO_ALA_TYPE_DEFAULT;
if (str.EqualsASCII(GEO_ALA_TYPE_VALUE_PRECISE)) {
fm = GEO_ALA_TYPE_PRECISE;
} else if (str.EqualsASCII(GEO_ALA_TYPE_VALUE_APPROX)) {
#ifdef MOZ_APPROX_LOCATION
fm = GEO_ALA_TYPE_APPROX;
#else
// we are loading a profile from a build with MOZ_APPROX_LOCATION
// enabled, then we need to force the type to a sane value
fm = GEO_ALA_TYPE_NONE;
#endif
} else if (str.EqualsASCII(GEO_ALA_TYPE_VALUE_FIXED)) {
fm = GEO_ALA_TYPE_FIXED;
} else if (str.EqualsASCII(GEO_ALA_TYPE_VALUE_NONE)) {
fm = GEO_ALA_TYPE_NONE;
}
if ((fm >= GEO_ALA_TYPE_FIRST) && (fm <= GEO_ALA_TYPE_LAST)) {
GPSLOG("changing type for %s to %s (%d)",
(mOrigin.IsEmpty() ? "global" : NS_ConvertUTF16toUTF8(mOrigin).get()),
NS_ConvertUTF16toUTF8(str).get(),
static_cast<int>(fm));
mFuzzMethod = fm;
}
// based on the new type, we need to clean up the other settings
switch (mFuzzMethod) {
case GEO_ALA_TYPE_PRECISE:
case GEO_ALA_TYPE_NONE:
#ifdef MOZ_APPROX_LOCATION
mDistance = 0;
#endif
mLatitude = 0.0;
mLongitude = 0.0;
break;
#ifdef MOZ_APPROX_LOCATION
case GEO_ALA_TYPE_APPROX:
mLatitude = 0.0;
mLongitude = 0.0;
break;
#endif
case GEO_ALA_TYPE_FIXED:
#ifdef MOZ_APPROX_LOCATION
mDistance = 0;
#endif
break;
}
}
#ifdef MOZ_APPROX_LOCATION
void
GeolocationSetting::HandleApproxDistanceChange(const JS::Value& aVal)
{
if (!aVal.isInt32()) {
return;
}
GPSLOG("changing approx distance for %s to %d",
(mOrigin.IsEmpty() ? "global" : NS_ConvertUTF16toUTF8(mOrigin).get()),
aVal.toInt32());
// set the approximate distance
mDistance = aVal.toInt32();
}
#endif
void
GeolocationSetting::HandleFixedCoordsChange(const JS::Value& aVal)
{
nsAutoJSString str;
if (!str.init(aVal)) {
return;
}
// parse the string and store the global lat/lon
// the string is in the form of @1.2345,6.7890
// check for leading '@' and a comma in the middle
int32_t const comma = str.Find(",");
if ( (str.CharAt(0) != '@') || (comma == -1) ) {
return;
}
// pull the lat and lon out of the string and convert to doubles
nsresult rv;
nsString slat(Substring(str, 1, comma - 1));
nsString slon(Substring(str, comma + 1));
double lat = slat.ToDouble(&rv);
NS_ENSURE_SUCCESS(rv,);
double lon = slon.ToDouble(&rv);
NS_ENSURE_SUCCESS(rv,);
// store the values
mLatitude = lat;
mLongitude = lon;
GPSLOG("changing coords for %s to %s (%f, %f)",
(mOrigin.IsEmpty() ? "global" : NS_ConvertUTF16toUTF8(mOrigin).get()),
NS_ConvertUTF16toUTF8(str).get(),
mLatitude, mLongitude);
}