gecko-dev/dom/base/Navigator.cpp

/* -*- 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/. */

// Needs to be first.
#include "base/basictypes.h"

#include "Navigator.h"
#include "nsIXULAppInfo.h"
#include "nsPluginArray.h"
#include "nsMimeTypeArray.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/dom/BodyExtractor.h"
#include "mozilla/dom/FetchBinding.h"
#include "mozilla/dom/File.h"
#include "nsGeolocation.h"
#include "nsIClassOfService.h"
#include "nsIHttpProtocolHandler.h"
#include "nsIContentPolicy.h"
#include "nsIContentSecurityPolicy.h"
#include "nsContentPolicyUtils.h"
#include "nsISupportsPriority.h"
#include "nsICachingChannel.h"
#include "nsIWebContentHandlerRegistrar.h"
#include "nsICookiePermission.h"
#include "nsIScriptSecurityManager.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsContentUtils.h"
#include "nsUnicharUtils.h"
#include "mozilla/Preferences.h"
#include "mozilla/Telemetry.h"
#include "BatteryManager.h"
#include "mozilla/dom/CredentialsContainer.h"
#include "mozilla/dom/GamepadServiceTest.h"
#include "mozilla/dom/WakeLock.h"
#include "mozilla/dom/power/PowerManagerService.h"
#include "mozilla/dom/MIDIAccessManager.h"
#include "mozilla/dom/MIDIOptionsBinding.h"
#include "mozilla/dom/Permissions.h"
#include "mozilla/dom/Presentation.h"
#include "mozilla/dom/ServiceWorkerContainer.h"
#include "mozilla/dom/StorageManager.h"
#include "mozilla/dom/TCPSocket.h"
#include "mozilla/dom/URLSearchParams.h"
#include "mozilla/dom/VRDisplay.h"
#include "mozilla/dom/VRDisplayEvent.h"
#include "mozilla/dom/VRServiceTest.h"
#include "mozilla/dom/workerinternals/RuntimeService.h"
#include "mozilla/Hal.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/StaticPtr.h"
#include "Connection.h"
#include "mozilla/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()
#include "nsGlobalWindow.h"
#include "nsIIdleObserver.h"
#include "nsIPermissionManager.h"
#include "nsMimeTypes.h"
#include "nsNetUtil.h"
#include "nsRFPService.h"
#include "nsStringStream.h"
#include "nsComponentManagerUtils.h"
#include "nsIStringStream.h"
#include "nsIHttpChannel.h"
#include "nsIHttpChannelInternal.h"
#include "nsStreamUtils.h"
#include "WidgetUtils.h"
#include "nsIPresentationService.h"
#include "nsIScriptError.h"

#include "mozilla/dom/MediaDevices.h"
#include "MediaManager.h"

#include "nsIDOMGlobalPropertyInitializer.h"
#include "nsJSUtils.h"

#include "mozilla/dom/NavigatorBinding.h"
#include "mozilla/dom/Promise.h"

#include "nsIUploadChannel2.h"
#include "mozilla/dom/FormData.h"
#include "nsIDocShell.h"

#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerRunnable.h"

#if defined(XP_LINUX)
#include "mozilla/Hal.h"
#endif
#include "mozilla/dom/ContentChild.h"

#include "mozilla/EMEUtils.h"
#include "mozilla/DetailedPromise.h"
#include "mozilla/Unused.h"

namespace mozilla {
namespace dom {

static bool sVibratorEnabled   = false;
static uint32_t sMaxVibrateMS  = 0;
static uint32_t sMaxVibrateListLen = 0;
static const char* kVibrationPermissionType = "vibration";

static void
AddPermission(nsIPrincipal* aPrincipal, const char* aType, uint32_t aPermission,
              uint32_t aExpireType, int64_t aExpireTime)
{
  MOZ_ASSERT(aType);
  MOZ_ASSERT(aPrincipal);

  nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
  if (!permMgr) {
    return;
  }
  permMgr->AddFromPrincipal(aPrincipal, aType, aPermission, aExpireType,
                            aExpireTime);
}

static uint32_t
GetPermission(nsPIDOMWindowInner* aWindow, const char* aType)
{
  MOZ_ASSERT(aType);

  uint32_t permission = nsIPermissionManager::UNKNOWN_ACTION;

  nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
  if (!permMgr) {
    return permission;
  }
  permMgr->TestPermissionFromWindow(aWindow, aType, &permission);
  return permission;
}

static uint32_t
GetPermission(nsIPrincipal* aPrincipal, const char* aType)
{
  MOZ_ASSERT(aType);
  MOZ_ASSERT(aPrincipal);

  uint32_t permission = nsIPermissionManager::UNKNOWN_ACTION;

  nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
  if (!permMgr) {
    return permission;
  }
  permMgr->TestPermissionFromPrincipal(aPrincipal, aType, &permission);
  return permission;
}

/* static */
void
Navigator::Init()
{
  Preferences::AddBoolVarCache(&sVibratorEnabled,
                               "dom.vibrator.enabled", true);
  Preferences::AddUintVarCache(&sMaxVibrateMS,
                               "dom.vibrator.max_vibrate_ms", 10000);
  Preferences::AddUintVarCache(&sMaxVibrateListLen,
                               "dom.vibrator.max_vibrate_list_len", 128);
}

Navigator::Navigator(nsPIDOMWindowInner* aWindow)
  : mWindow(aWindow)
{
}

Navigator::~Navigator()
{
  Invalidate();
}

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Navigator)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

NS_IMPL_CYCLE_COLLECTING_ADDREF(Navigator)
NS_IMPL_CYCLE_COLLECTING_RELEASE(Navigator)

NS_IMPL_CYCLE_COLLECTION_CLASS(Navigator)

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Navigator)
  tmp->Invalidate();
  NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindow)
  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Navigator)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMimeTypes)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPlugins)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPermissions)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGeolocation)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBatteryManager)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBatteryPromise)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mConnection)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mStorageManager)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCredentials)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaDevices)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mServiceWorkerContainer)

  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindow)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaKeySystemAccessManager)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPresentation)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGamepadServiceTest)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVRGetDisplaysPromises)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVRServiceTest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(Navigator)

void
Navigator::Invalidate()
{
  // Don't clear mWindow here so we know we've got a non-null mWindow
  // until we're unlinked.

  mMimeTypes = nullptr;

  if (mPlugins) {
    mPlugins->Invalidate();
    mPlugins = nullptr;
  }

  mPermissions = nullptr;

  mStorageManager = nullptr;

  // If there is a page transition, make sure delete the geolocation object.
  if (mGeolocation) {
    mGeolocation->Shutdown();
    mGeolocation = nullptr;
  }

  if (mBatteryManager) {
    mBatteryManager->Shutdown();
    mBatteryManager = nullptr;
  }

  mBatteryPromise = nullptr;

  if (mConnection) {
    mConnection->Shutdown();
    mConnection = nullptr;
  }

  mMediaDevices = nullptr;

  if (mPresentation) {
    mPresentation = nullptr;
  }

  mServiceWorkerContainer = nullptr;

  if (mMediaKeySystemAccessManager) {
    mMediaKeySystemAccessManager->Shutdown();
    mMediaKeySystemAccessManager = nullptr;
  }

  if (mGamepadServiceTest) {
    mGamepadServiceTest->Shutdown();
    mGamepadServiceTest = nullptr;
  }

  mVRGetDisplaysPromises.Clear();

  if (mVRServiceTest) {
    mVRServiceTest->Shutdown();
    mVRServiceTest = nullptr;
  }
}

void
Navigator::GetUserAgent(nsAString& aUserAgent, CallerType aCallerType,
                        ErrorResult& aRv) const
{
  nsCOMPtr<nsPIDOMWindowInner> window;

  if (mWindow) {
    window = mWindow;
    nsIDocShell* docshell = window->GetDocShell();
    nsString customUserAgent;
    if (docshell) {
      docshell->GetCustomUserAgent(customUserAgent);

      if (!customUserAgent.IsEmpty()) {
        aUserAgent = customUserAgent;
        return;
      }
    }
  }

  nsresult rv = GetUserAgent(window,
                             aCallerType == CallerType::System,
                             aUserAgent);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
  }
}

void
Navigator::GetAppCodeName(nsAString& aAppCodeName, ErrorResult& aRv)
{
  nsresult rv;

  nsCOMPtr<nsIHttpProtocolHandler>
    service(do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "http", &rv));
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
    return;
  }

  nsAutoCString appName;
  rv = service->GetAppName(appName);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
    return;
  }

  CopyASCIItoUTF16(appName, aAppCodeName);
}

void
Navigator::GetAppVersion(nsAString& aAppVersion, CallerType aCallerType,
                         ErrorResult& aRv) const
{
  nsresult rv = GetAppVersion(aAppVersion,
    /* aUsePrefOverriddenValue = */ aCallerType != CallerType::System);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
  }
}

void
Navigator::GetAppName(nsAString& aAppName, CallerType aCallerType) const
{
  AppName(aAppName,
          /* aUsePrefOverriddenValue = */ aCallerType != CallerType::System);
}

/**
 * Returns the value of Accept-Languages (HTTP header) as a nsTArray of
 * languages. The value is set in the preference by the user ("Content
 * Languages").
 *
 * "en", "en-US" and "i-cherokee" and "" are valid languages tokens.
 *
 * An empty array will be returned if there is no valid languages.
 */
/* static */ void
Navigator::GetAcceptLanguages(nsTArray<nsString>& aLanguages)
{
  MOZ_ASSERT(NS_IsMainThread());

  aLanguages.Clear();

  // E.g. "de-de, en-us,en".
  nsAutoString acceptLang;
  Preferences::GetLocalizedString("intl.accept_languages", acceptLang);

  // Split values on commas.
  nsCharSeparatedTokenizer langTokenizer(acceptLang, ',');
  while (langTokenizer.hasMoreTokens()) {
    nsDependentSubstring lang = langTokenizer.nextToken();

    // Replace "_" with "-" to avoid POSIX/Windows "en_US" notation.
    // NOTE: we should probably rely on the pref being set correctly.
    if (lang.Length() > 2 && lang[2] == char16_t('_')) {
      lang.Replace(2, 1, char16_t('-'));
    }

    // Use uppercase for country part, e.g. "en-US", not "en-us", see BCP47
    // only uppercase 2-letter country codes, not "zh-Hant", "de-DE-x-goethe".
    // NOTE: we should probably rely on the pref being set correctly.
    if (lang.Length() > 2) {
      nsCharSeparatedTokenizer localeTokenizer(lang, '-');
      int32_t pos = 0;
      bool first = true;
      while (localeTokenizer.hasMoreTokens()) {
        const nsAString& code = localeTokenizer.nextToken();

        if (code.Length() == 2 && !first) {
          nsAutoString upper(code);
          ToUpperCase(upper);
          lang.Replace(pos, code.Length(), upper);
        }

        pos += code.Length() + 1; // 1 is the separator
        first = false;
      }
    }

    aLanguages.AppendElement(lang);
  }
}

/**
 * Do not use UI language (chosen app locale) here but the first value set in
 * the Accept Languages header, see ::GetAcceptLanguages().
 *
 * See RFC 2616, Section 15.1.4 "Privacy Issues Connected to Accept Headers" for
 * the reasons why.
 */
void
Navigator::GetLanguage(nsAString& aLanguage)
{
  nsTArray<nsString> languages;
  GetLanguages(languages);
  if (languages.Length() >= 1) {
    aLanguage.Assign(languages[0]);
  } else {
    aLanguage.Truncate();
  }
}

void
Navigator::GetLanguages(nsTArray<nsString>& aLanguages)
{
  GetAcceptLanguages(aLanguages);

  // The returned value is cached by the binding code. The window listen to the
  // accept languages change and will clear the cache when needed. It has to
  // take care of dispatching the DOM event already and the invalidation and the
  // event has to be timed correctly.
}

void
Navigator::GetPlatform(nsAString& aPlatform, CallerType aCallerType,
                       ErrorResult& aRv) const
{
  nsresult rv = GetPlatform(aPlatform,
    /* aUsePrefOverriddenValue = */ aCallerType != CallerType::System);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
  }
}

void
Navigator::GetOscpu(nsAString& aOSCPU, CallerType aCallerType,
                    ErrorResult& aRv) const
{
  if (aCallerType != CallerType::System) {
    // If fingerprinting resistance is on, we will spoof this value. See nsRFPService.h
    // for details about spoofed values.
    if (nsContentUtils::ShouldResistFingerprinting()) {
      aOSCPU.AssignLiteral(SPOOFED_OSCPU);
      return;
    }

    nsAutoString override;
    nsresult rv = Preferences::GetString("general.oscpu.override", override);
    if (NS_SUCCEEDED(rv)) {
      aOSCPU = override;
      return;
    }
  }

  nsresult rv;
  nsCOMPtr<nsIHttpProtocolHandler>
    service(do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "http", &rv));
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
    return;
  }

  nsAutoCString oscpu;
  rv = service->GetOscpu(oscpu);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
    return;
  }

  CopyASCIItoUTF16(oscpu, aOSCPU);
}

void
Navigator::GetVendor(nsAString& aVendor)
{
  aVendor.Truncate();
}

void
Navigator::GetVendorSub(nsAString& aVendorSub)
{
  aVendorSub.Truncate();
}

void
Navigator::GetProduct(nsAString& aProduct)
{
  aProduct.AssignLiteral("Gecko");
}

void
Navigator::GetProductSub(nsAString& aProductSub)
{
  // Legacy build ID hardcoded for backward compatibility (bug 776376)
  aProductSub.AssignLiteral(LEGACY_BUILD_ID);
}

nsMimeTypeArray*
Navigator::GetMimeTypes(ErrorResult& aRv)
{
  if (!mMimeTypes) {
    if (!mWindow) {
      aRv.Throw(NS_ERROR_UNEXPECTED);
      return nullptr;
    }
    mMimeTypes = new nsMimeTypeArray(mWindow);
  }

  return mMimeTypes;
}

nsPluginArray*
Navigator::GetPlugins(ErrorResult& aRv)
{
  if (!mPlugins) {
    if (!mWindow) {
      aRv.Throw(NS_ERROR_UNEXPECTED);
      return nullptr;
    }
    mPlugins = new nsPluginArray(mWindow);
    mPlugins->Init();
  }

  return mPlugins;
}

Permissions*
Navigator::GetPermissions(ErrorResult& aRv)
{
  if (!mWindow) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return nullptr;
  }

  if (!mPermissions) {
    mPermissions = new Permissions(mWindow);
  }

  return mPermissions;
}

StorageManager*
Navigator::Storage()
{
  MOZ_ASSERT(mWindow);

  if(!mStorageManager) {
    mStorageManager = new StorageManager(mWindow->AsGlobal());
  }

  return mStorageManager;
}

// Values for the network.cookie.cookieBehavior pref are documented in
// nsCookieService.cpp.
#define COOKIE_BEHAVIOR_REJECT 2

bool
Navigator::CookieEnabled()
{
  bool cookieEnabled =
    (Preferences::GetInt("network.cookie.cookieBehavior",
                         COOKIE_BEHAVIOR_REJECT) != COOKIE_BEHAVIOR_REJECT);

  // Check whether an exception overrides the global cookie behavior
  // Note that the code for getting the URI here matches that in
  // nsHTMLDocument::SetCookie.
  if (!mWindow || !mWindow->GetDocShell()) {
    return cookieEnabled;
  }

  nsCOMPtr<nsIDocument> doc = mWindow->GetExtantDoc();
  if (!doc) {
    return cookieEnabled;
  }

  nsCOMPtr<nsIURI> codebaseURI;
  doc->NodePrincipal()->GetURI(getter_AddRefs(codebaseURI));

  if (!codebaseURI) {
    // Not a codebase, so technically can't set cookies, but let's
    // just return the default value.
    return cookieEnabled;
  }

  nsCOMPtr<nsICookiePermission> permMgr =
    do_GetService(NS_COOKIEPERMISSION_CONTRACTID);
  NS_ENSURE_TRUE(permMgr, cookieEnabled);

  // Pass null for the channel, just like the cookie service does.
  nsCookieAccess access;
  nsresult rv = permMgr->CanAccess(doc->NodePrincipal(), &access);
  NS_ENSURE_SUCCESS(rv, cookieEnabled);

  if (access != nsICookiePermission::ACCESS_DEFAULT) {
    cookieEnabled = access != nsICookiePermission::ACCESS_DENY;
  }

  return cookieEnabled;
}

bool
Navigator::OnLine()
{
  return !NS_IsOffline();
}

void
Navigator::GetBuildID(nsAString& aBuildID, CallerType aCallerType,
                      ErrorResult& aRv) const
{
  if (aCallerType != CallerType::System) {
    // If fingerprinting resistance is on, we will spoof this value. See nsRFPService.h
    // for details about spoofed values.
    if (nsContentUtils::ShouldResistFingerprinting()) {
      aBuildID.AssignLiteral(LEGACY_BUILD_ID);
      return;
    }
    nsAutoString override;
    nsresult rv = Preferences::GetString("general.buildID.override", override);
    if (NS_SUCCEEDED(rv)) {
      aBuildID = override;
      return;
    }
  }

  nsCOMPtr<nsIXULAppInfo> appInfo =
    do_GetService("@mozilla.org/xre/app-info;1");
  if (!appInfo) {
    aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
    return;
  }

  nsAutoCString buildID;
  nsresult rv = appInfo->GetAppBuildID(buildID);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
    return;
  }

  aBuildID.Truncate();
  AppendASCIItoUTF16(buildID, aBuildID);
}

void
Navigator::GetDoNotTrack(nsAString &aResult)
{
  bool doNotTrack = nsContentUtils::DoNotTrackEnabled();
  if (!doNotTrack) {
    nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(mWindow);
    doNotTrack = loadContext && loadContext->UseTrackingProtection();
  }

  if (doNotTrack) {
    aResult.AssignLiteral("1");
  } else {
    aResult.AssignLiteral("unspecified");
  }
}

bool
Navigator::JavaEnabled(CallerType aCallerType, ErrorResult& aRv)
{
  Telemetry::AutoTimer<Telemetry::CHECK_JAVA_ENABLED> telemetryTimer;

  // Return true if we have a handler for the java mime
  nsAutoString javaMIME;
  Preferences::GetString("plugin.java.mime", javaMIME);
  NS_ENSURE_TRUE(!javaMIME.IsEmpty(), false);

  if (!mMimeTypes) {
    if (!mWindow) {
      aRv.Throw(NS_ERROR_UNEXPECTED);
      return false;
    }
    mMimeTypes = new nsMimeTypeArray(mWindow);
  }

  RefreshMIMEArray();

  nsMimeType *mimeType = mMimeTypes->NamedItem(javaMIME, aCallerType);

  return mimeType && mimeType->GetEnabledPlugin();
}

uint64_t
Navigator::HardwareConcurrency()
{
  workerinternals::RuntimeService* rts =
    workerinternals::RuntimeService::GetOrCreateService();
  if (!rts) {
    return 1;
  }

  return rts->ClampedHardwareConcurrency();
}

void
Navigator::RefreshMIMEArray()
{
  if (mMimeTypes) {
    mMimeTypes->Refresh();
  }
}

namespace {

class VibrateWindowListener : public nsIDOMEventListener
{
public:
  VibrateWindowListener(nsPIDOMWindowInner* aWindow, nsIDocument* aDocument)
  {
    mWindow = do_GetWeakReference(aWindow);
    mDocument = do_GetWeakReference(aDocument);

    NS_NAMED_LITERAL_STRING(visibilitychange, "visibilitychange");
    aDocument->AddSystemEventListener(visibilitychange,
                                      this, /* listener */
                                      true, /* use capture */
                                      false /* wants untrusted */);
  }

  void RemoveListener();

  NS_DECL_ISUPPORTS
  NS_DECL_NSIDOMEVENTLISTENER

private:
  virtual ~VibrateWindowListener()
  {
  }

  nsWeakPtr mWindow;
  nsWeakPtr mDocument;
};

NS_IMPL_ISUPPORTS(VibrateWindowListener, nsIDOMEventListener)

StaticRefPtr<VibrateWindowListener> gVibrateWindowListener;

static bool
MayVibrate(nsIDocument* doc) {
  // Hidden documents cannot start or stop a vibration.
  return (doc && !doc->Hidden());
}

NS_IMETHODIMP
VibrateWindowListener::HandleEvent(nsIDOMEvent* aEvent)
{
  nsCOMPtr<nsIDocument> doc =
    do_QueryInterface(aEvent->InternalDOMEvent()->GetTarget());

  if (!MayVibrate(doc)) {
    // It's important that we call CancelVibrate(), not Vibrate() with an
    // empty list, because Vibrate() will fail if we're no longer focused, but
    // CancelVibrate() will succeed, so long as nobody else has started a new
    // vibration pattern.
    nsCOMPtr<nsPIDOMWindowInner> window = do_QueryReferent(mWindow);
    hal::CancelVibrate(window);
    RemoveListener();
    gVibrateWindowListener = nullptr;
    // Careful: The line above might have deleted |this|!
  }

  return NS_OK;
}

void
VibrateWindowListener::RemoveListener()
{
  nsCOMPtr<EventTarget> target = do_QueryReferent(mDocument);
  if (!target) {
    return;
  }
  NS_NAMED_LITERAL_STRING(visibilitychange, "visibilitychange");
  target->RemoveSystemEventListener(visibilitychange, this,
                                    true /* use capture */);
}

} // namespace

void
Navigator::AddIdleObserver(MozIdleObserver& aIdleObserver, ErrorResult& aRv)
{
  if (!mWindow) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return;
  }
  CallbackObjectHolder<MozIdleObserver, nsIIdleObserver> holder(&aIdleObserver);
  nsCOMPtr<nsIIdleObserver> obs = holder.ToXPCOMCallback();
  if (NS_FAILED(mWindow->RegisterIdleObserver(obs))) {
    NS_WARNING("Failed to add idle observer.");
  }
}

void
Navigator::RemoveIdleObserver(MozIdleObserver& aIdleObserver, ErrorResult& aRv)
{
  if (!mWindow) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return;
  }
  CallbackObjectHolder<MozIdleObserver, nsIIdleObserver> holder(&aIdleObserver);
  nsCOMPtr<nsIIdleObserver> obs = holder.ToXPCOMCallback();
  if (NS_FAILED(mWindow->UnregisterIdleObserver(obs))) {
    NS_WARNING("Failed to remove idle observer.");
  }
}

void
Navigator::SetVibrationPermission(bool aPermitted, bool aPersistent)
{
  MOZ_ASSERT(NS_IsMainThread());

  nsTArray<uint32_t> pattern;
  pattern.SwapElements(mRequestedVibrationPattern);

  if (!mWindow) {
    return;
  }

  nsCOMPtr<nsIDocument> doc = mWindow->GetExtantDoc();

  if (!MayVibrate(doc)) {
    return;
  }

  if (aPermitted) {
    // Add a listener to cancel the vibration if the document becomes hidden,
    // and remove the old visibility listener, if there was one.
    if (!gVibrateWindowListener) {
      // If gVibrateWindowListener is null, this is the first time we've vibrated,
      // and we need to register a listener to clear gVibrateWindowListener on
      // shutdown.
      ClearOnShutdown(&gVibrateWindowListener);
    } else {
      gVibrateWindowListener->RemoveListener();
    }
    gVibrateWindowListener = new VibrateWindowListener(mWindow, doc);
    hal::Vibrate(pattern, mWindow);
  }

  if (aPersistent) {
    AddPermission(doc->NodePrincipal(), kVibrationPermissionType,
                  aPermitted ? nsIPermissionManager::ALLOW_ACTION :
                               nsIPermissionManager::DENY_ACTION,
                  nsIPermissionManager::EXPIRE_SESSION, 0);
  }
}

bool
Navigator::Vibrate(uint32_t aDuration)
{
  AutoTArray<uint32_t, 1> pattern;
  pattern.AppendElement(aDuration);
  return Vibrate(pattern);
}

bool
Navigator::Vibrate(const nsTArray<uint32_t>& aPattern)
{
  MOZ_ASSERT(NS_IsMainThread());

  if (!mWindow) {
    return false;
  }

  nsCOMPtr<nsIDocument> doc = mWindow->GetExtantDoc();

  if (!MayVibrate(doc)) {
    return false;
  }

  nsTArray<uint32_t> pattern(aPattern);

  if (pattern.Length() > sMaxVibrateListLen) {
    pattern.SetLength(sMaxVibrateListLen);
  }

  for (size_t i = 0; i < pattern.Length(); ++i) {
    pattern[i] = std::min(sMaxVibrateMS, pattern[i]);
  }

  // The spec says we check sVibratorEnabled after we've done the sanity
  // checking on the pattern.
  if (!sVibratorEnabled) {
    return true;
  }

  mRequestedVibrationPattern.SwapElements(pattern);
  uint32_t permission = GetPermission(mWindow, kVibrationPermissionType);

  if (permission == nsIPermissionManager::ALLOW_ACTION ||
      mRequestedVibrationPattern.IsEmpty() ||
      (mRequestedVibrationPattern.Length() == 1 &&
       mRequestedVibrationPattern[0] == 0)) {
    // Always allow cancelling vibration and respect session permissions.
    SetVibrationPermission(true /* permitted */, false /* persistent */);
    return true;
  }

  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
  if (!obs || permission == nsIPermissionManager::DENY_ACTION) {
    // Abort without observer service or on denied session permission.
    SetVibrationPermission(false /* permitted */, false /* persistent */);
    return true;
  }

  // Request user permission.
  obs->NotifyObservers(ToSupports(this), "Vibration:Request", nullptr);

  return true;
}

//*****************************************************************************
//  Pointer Events interface
//*****************************************************************************

uint32_t
Navigator::MaxTouchPoints()
{
  nsCOMPtr<nsIWidget> widget = widget::WidgetUtils::DOMWindowToWidget(mWindow->GetOuterWindow());

  NS_ENSURE_TRUE(widget, 0);
  return widget->GetMaxTouchPoints();
}

//*****************************************************************************
//    Navigator::nsIDOMClientInformation
//*****************************************************************************

void
Navigator::RegisterContentHandler(const nsAString& aMIMEType,
                                  const nsAString& aURI,
                                  const nsAString& aTitle,
                                  ErrorResult& aRv)
{
  if (!mWindow || !mWindow->GetOuterWindow() || !mWindow->GetDocShell()) {
    return;
  }

  nsCOMPtr<nsIWebContentHandlerRegistrar> registrar =
    do_GetService(NS_WEBCONTENTHANDLERREGISTRAR_CONTRACTID);
  if (!registrar) {
    return;
  }

  aRv = registrar->RegisterContentHandler(aMIMEType, aURI, aTitle,
                                          mWindow->GetOuterWindow());
}

void
Navigator::RegisterProtocolHandler(const nsAString& aProtocol,
                                   const nsAString& aURI,
                                   const nsAString& aTitle,
                                   ErrorResult& aRv)
{
  if (!mWindow || !mWindow->GetOuterWindow() || !mWindow->GetDocShell()) {
    return;
  }

  if (!mWindow->IsSecureContext() && mWindow->GetDoc()) {
    mWindow->GetDoc()->WarnOnceAbout(nsIDocument::eRegisterProtocolHandlerInsecure);
  }

  nsCOMPtr<nsIWebContentHandlerRegistrar> registrar =
    do_GetService(NS_WEBCONTENTHANDLERREGISTRAR_CONTRACTID);
  if (!registrar) {
    return;
  }

  aRv = registrar->RegisterProtocolHandler(aProtocol, aURI, aTitle,
                                           mWindow->GetOuterWindow());
}

Geolocation*
Navigator::GetGeolocation(ErrorResult& aRv)
{
  if (mGeolocation) {
    return mGeolocation;
  }

  if (!mWindow || !mWindow->GetOuterWindow() || !mWindow->GetDocShell()) {
    aRv.Throw(NS_ERROR_FAILURE);
    return nullptr;
  }

  mGeolocation = new Geolocation();
  if (NS_FAILED(mGeolocation->Init(mWindow))) {
    mGeolocation = nullptr;
    aRv.Throw(NS_ERROR_FAILURE);
    return nullptr;
  }

  return mGeolocation;
}

class BeaconStreamListener final : public nsIStreamListener
{
    ~BeaconStreamListener() {}

  public:
    BeaconStreamListener() : mLoadGroup(nullptr) {}

    void SetLoadGroup(nsILoadGroup* aLoadGroup) {
      mLoadGroup = aLoadGroup;
    }

    NS_DECL_ISUPPORTS
    NS_DECL_NSISTREAMLISTENER
    NS_DECL_NSIREQUESTOBSERVER

  private:
    nsCOMPtr<nsILoadGroup> mLoadGroup;

};

NS_IMPL_ISUPPORTS(BeaconStreamListener,
                  nsIStreamListener,
                  nsIRequestObserver)

NS_IMETHODIMP
BeaconStreamListener::OnStartRequest(nsIRequest *aRequest,
                                     nsISupports *aContext)
{
  // release the loadgroup first
  mLoadGroup = nullptr;

  aRequest->Cancel(NS_ERROR_NET_INTERRUPT);
  return NS_BINDING_ABORTED;
}

NS_IMETHODIMP
BeaconStreamListener::OnStopRequest(nsIRequest *aRequest,
                                    nsISupports *aContext,
                                    nsresult aStatus)
{
  return NS_OK;
}

NS_IMETHODIMP
BeaconStreamListener::OnDataAvailable(nsIRequest *aRequest,
                                      nsISupports *ctxt,
                                      nsIInputStream *inStr,
                                      uint64_t sourceOffset,
                                      uint32_t count)
{
  MOZ_ASSERT(false);
  return NS_OK;
}

bool
Navigator::SendBeacon(const nsAString& aUrl,
                      const Nullable<fetch::BodyInit>& aData,
                      ErrorResult& aRv)
{
  if (aData.IsNull()) {
    return SendBeaconInternal(aUrl, nullptr, eBeaconTypeOther, aRv);
  }

  if (aData.Value().IsArrayBuffer()) {
    BodyExtractor<const ArrayBuffer> body(&aData.Value().GetAsArrayBuffer());
    return SendBeaconInternal(aUrl, &body, eBeaconTypeArrayBuffer, aRv);
  }

  if (aData.Value().IsArrayBufferView()) {
    BodyExtractor<const ArrayBufferView> body(&aData.Value().GetAsArrayBufferView());
    return SendBeaconInternal(aUrl, &body, eBeaconTypeArrayBuffer, aRv);
  }

  if (aData.Value().IsBlob()) {
    BodyExtractor<const Blob> body(&aData.Value().GetAsBlob());
    return SendBeaconInternal(aUrl, &body, eBeaconTypeBlob, aRv);
  }

  if (aData.Value().IsFormData()) {
    BodyExtractor<const FormData> body(&aData.Value().GetAsFormData());
    return SendBeaconInternal(aUrl, &body, eBeaconTypeOther, aRv);
  }

  if (aData.Value().IsUSVString()) {
    BodyExtractor<const nsAString> body(&aData.Value().GetAsUSVString());
    return SendBeaconInternal(aUrl, &body, eBeaconTypeOther, aRv);
  }

  if (aData.Value().IsURLSearchParams()) {
    BodyExtractor<const URLSearchParams> body(&aData.Value().GetAsURLSearchParams());
    return SendBeaconInternal(aUrl, &body, eBeaconTypeOther, aRv);
  }

  MOZ_CRASH("Invalid data type.");
  return false;
}

bool
Navigator::SendBeaconInternal(const nsAString& aUrl,
                              BodyExtractorBase* aBody,
                              BeaconType aType,
                              ErrorResult& aRv)
{
  if (!mWindow) {
    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
    return false;
  }

  nsCOMPtr<nsIDocument> doc = mWindow->GetDoc();
  if (!doc) {
    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
    return false;
  }

  nsIURI* documentURI = doc->GetDocumentURI();
  if (!documentURI) {
    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
    return false;
  }

  nsCOMPtr<nsIURI> uri;
  nsresult rv = nsContentUtils::NewURIWithDocumentCharset(
                  getter_AddRefs(uri),
                  aUrl,
                  doc,
                  doc->GetDocBaseURI());
  if (NS_FAILED(rv)) {
    aRv.ThrowTypeError<MSG_INVALID_URL>(aUrl);
    return false;
  }

  // Spec disallows any schemes save for HTTP/HTTPs
  bool isValidScheme;
  if (!(NS_SUCCEEDED(uri->SchemeIs("http", &isValidScheme)) && isValidScheme) &&
      !(NS_SUCCEEDED(uri->SchemeIs("https", &isValidScheme)) && isValidScheme)) {
    aRv.ThrowTypeError<MSG_INVALID_URL_SCHEME>( NS_LITERAL_STRING("Beacon"), aUrl);
    return false;
  }

  nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL |
    nsIChannel::LOAD_CLASSIFY_URI;

  // No need to use CORS for sendBeacon unless it's a BLOB
  nsSecurityFlags securityFlags = aType == eBeaconTypeBlob
    ? nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS
    : nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS;
  securityFlags |= nsILoadInfo::SEC_COOKIES_INCLUDE;

  nsCOMPtr<nsIChannel> channel;
  rv = NS_NewChannel(getter_AddRefs(channel),
                     uri,
                     doc,
                     securityFlags,
                     nsIContentPolicy::TYPE_BEACON,
                     nullptr, // aPerformanceStorage
                     nullptr, // aLoadGroup
                     nullptr, // aCallbacks
                     loadFlags);

  if (NS_FAILED(rv)) {
    aRv.Throw(rv);
    return false;
  }

  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(channel);
  if (!httpChannel) {
    // Beacon spec only supports HTTP requests at this time
    aRv.Throw(NS_ERROR_DOM_BAD_URI);
    return false;
  }
  mozilla::net::ReferrerPolicy referrerPolicy = doc->GetReferrerPolicy();
  rv = httpChannel->SetReferrerWithPolicy(documentURI, referrerPolicy);
  MOZ_ASSERT(NS_SUCCEEDED(rv));

  nsCOMPtr<nsIInputStream> in;
  nsAutoCString contentTypeWithCharset;
  nsAutoCString charset;
  uint64_t length = 0;

  if (aBody) {
    aRv = aBody->GetAsStream(getter_AddRefs(in), &length,
                             contentTypeWithCharset, charset);
    if (NS_WARN_IF(aRv.Failed())) {
      return false;
    }

    nsCOMPtr<nsIUploadChannel2> uploadChannel = do_QueryInterface(channel);
    if (!uploadChannel) {
      aRv.Throw(NS_ERROR_FAILURE);
      return false;
    }

    uploadChannel->ExplicitSetUploadStream(in, contentTypeWithCharset, length,
                                           NS_LITERAL_CSTRING("POST"),
                                           false);
  } else {
    rv = httpChannel->SetRequestMethod(NS_LITERAL_CSTRING("POST"));
    MOZ_ASSERT(NS_SUCCEEDED(rv));
  }

  nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(channel);
  if (p) {
    p->SetPriority(nsISupportsPriority::PRIORITY_LOWEST);
  }

  nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(channel));
  if (cos) {
    cos->AddClassFlags(nsIClassOfService::Background);
  }

  // The channel needs to have a loadgroup associated with it, so that we can
  // cancel the channel and any redirected channels it may create.
  nsCOMPtr<nsILoadGroup> loadGroup = do_CreateInstance(NS_LOADGROUP_CONTRACTID);
  nsCOMPtr<nsIInterfaceRequestor> callbacks =
    do_QueryInterface(mWindow->GetDocShell());
  loadGroup->SetNotificationCallbacks(callbacks);
  channel->SetLoadGroup(loadGroup);

  RefPtr<BeaconStreamListener> beaconListener = new BeaconStreamListener();
  rv = channel->AsyncOpen2(beaconListener);
  // do not throw if security checks fail within asyncOpen2
  NS_ENSURE_SUCCESS(rv, false);

  // make the beaconListener hold a strong reference to the loadgroup
  // which is released in ::OnStartRequest
  beaconListener->SetLoadGroup(loadGroup);

  return true;
}

MediaDevices*
Navigator::GetMediaDevices(ErrorResult& aRv)
{
  if (!mMediaDevices) {
    if (!mWindow ||
        !mWindow->GetOuterWindow() ||
        mWindow->GetOuterWindow()->GetCurrentInnerWindow() != mWindow) {
      aRv.Throw(NS_ERROR_NOT_AVAILABLE);
      return nullptr;
    }
    mMediaDevices = new MediaDevices(mWindow);
  }
  return mMediaDevices;
}

void
Navigator::MozGetUserMedia(const MediaStreamConstraints& aConstraints,
                           NavigatorUserMediaSuccessCallback& aOnSuccess,
                           NavigatorUserMediaErrorCallback& aOnError,
                           CallerType aCallerType,
                           ErrorResult& aRv)
{
  CallbackObjectHolder<NavigatorUserMediaSuccessCallback,
                       nsIDOMGetUserMediaSuccessCallback> holder1(&aOnSuccess);
  nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> onsuccess =
    holder1.ToXPCOMCallback();

  CallbackObjectHolder<NavigatorUserMediaErrorCallback,
                       nsIDOMGetUserMediaErrorCallback> holder2(&aOnError);
  nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onerror = holder2.ToXPCOMCallback();

  if (!mWindow || !mWindow->GetOuterWindow() ||
      mWindow->GetOuterWindow()->GetCurrentInnerWindow() != mWindow) {
    aRv.Throw(NS_ERROR_NOT_AVAILABLE);
    return;
  }

  MediaManager* manager = MediaManager::Get();
  aRv = manager->GetUserMedia(mWindow, aConstraints, onsuccess, onerror,
                              aCallerType);
}

void
Navigator::MozGetUserMediaDevices(const MediaStreamConstraints& aConstraints,
                                  MozGetUserMediaDevicesSuccessCallback& aOnSuccess,
                                  NavigatorUserMediaErrorCallback& aOnError,
                                  uint64_t aInnerWindowID,
                                  const nsAString& aCallID,
                                  ErrorResult& aRv)
{
  CallbackObjectHolder<MozGetUserMediaDevicesSuccessCallback,
                       nsIGetUserMediaDevicesSuccessCallback> holder1(&aOnSuccess);
  nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> onsuccess =
    holder1.ToXPCOMCallback();

  CallbackObjectHolder<NavigatorUserMediaErrorCallback,
                       nsIDOMGetUserMediaErrorCallback> holder2(&aOnError);
  nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onerror = holder2.ToXPCOMCallback();

  if (!mWindow || !mWindow->GetOuterWindow() ||
      mWindow->GetOuterWindow()->GetCurrentInnerWindow() != mWindow) {
    aRv.Throw(NS_ERROR_NOT_AVAILABLE);
    return;
  }

  MediaManager* manager = MediaManager::Get();
  aRv = manager->GetUserMediaDevices(mWindow, aConstraints, onsuccess, onerror,
                                     aInnerWindowID, aCallID);
}

//*****************************************************************************
//    Navigator::nsINavigatorBattery
//*****************************************************************************

Promise*
Navigator::GetBattery(ErrorResult& aRv)
{
  if (mBatteryPromise) {
    return mBatteryPromise;
  }

  if (!mWindow || !mWindow->GetDocShell()) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return nullptr;
  }

  RefPtr<Promise> batteryPromise = Promise::Create(mWindow->AsGlobal(), aRv);
  if (NS_WARN_IF(aRv.Failed())) {
    return nullptr;
  }
  mBatteryPromise = batteryPromise;

  if (!mBatteryManager) {
    mBatteryManager = new battery::BatteryManager(mWindow);
    mBatteryManager->Init();
  }

  mBatteryPromise->MaybeResolve(mBatteryManager);

  return mBatteryPromise;
}

already_AddRefed<LegacyMozTCPSocket>
Navigator::MozTCPSocket()
{
  RefPtr<LegacyMozTCPSocket> socket = new LegacyMozTCPSocket(GetWindow());
  return socket.forget();
}

void
Navigator::GetGamepads(nsTArray<RefPtr<Gamepad> >& aGamepads,
                       ErrorResult& aRv)
{
  if (!mWindow) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return;
  }
  NS_ENSURE_TRUE_VOID(mWindow->GetDocShell());
  nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(mWindow);
  win->SetHasGamepadEventListener(true);
  win->GetGamepads(aGamepads);
}

GamepadServiceTest*
Navigator::RequestGamepadServiceTest()
{
  if (!mGamepadServiceTest) {
    mGamepadServiceTest = GamepadServiceTest::CreateTestService(mWindow);
  }
  return mGamepadServiceTest;
}

already_AddRefed<Promise>
Navigator::GetVRDisplays(ErrorResult& aRv)
{
  if (!mWindow || !mWindow->GetDocShell()) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return nullptr;
  }

  nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(mWindow);
  win->NotifyVREventListenerAdded();

  RefPtr<Promise> p = Promise::Create(mWindow->AsGlobal(), aRv);
  if (aRv.Failed()) {
    return nullptr;
  }

  // We pass mWindow's id to RefreshVRDisplays, so NotifyVRDisplaysUpdated will
  // be called asynchronously, resolving the promises in mVRGetDisplaysPromises.
  if (!VRDisplay::RefreshVRDisplays(win->WindowID())) {
    p->MaybeReject(NS_ERROR_FAILURE);
    return p.forget();
  }

  mVRGetDisplaysPromises.AppendElement(p);
  return p.forget();
}

void
Navigator::GetActiveVRDisplays(nsTArray<RefPtr<VRDisplay>>& aDisplays) const
{
  /**
   * Get only the active VR displays.
   * GetActiveVRDisplays should only enumerate displays that
   * are already active without causing any other hardware to be
   * activated.
   * We must not call nsGlobalWindow::NotifyVREventListenerAdded here,
   * as that would cause enumeration and activation of other VR hardware.
   * Activating VR hardware is intrusive to the end user, as it may
   * involve physically powering on devices that the user did not
   * intend to use.
   */
  if (!mWindow || !mWindow->GetDocShell()) {
    return;
  }
  nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(mWindow);
  nsTArray<RefPtr<VRDisplay>> displays;
  if (win->UpdateVRDisplays(displays)) {
    for (auto display : displays) {
      if (display->IsPresenting()) {
        aDisplays.AppendElement(display);
      }
    }
  }
}

void
Navigator::NotifyVRDisplaysUpdated()
{
  // Synchronize the VR devices and resolve the promises in
  // mVRGetDisplaysPromises
  nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(mWindow);

  nsTArray<RefPtr<VRDisplay>> vrDisplays;
  if (win->UpdateVRDisplays(vrDisplays)) {
    for (auto p : mVRGetDisplaysPromises) {
      p->MaybeResolve(vrDisplays);
    }
  } else {
    for (auto p : mVRGetDisplaysPromises) {
      p->MaybeReject(NS_ERROR_FAILURE);
    }
  }
  mVRGetDisplaysPromises.Clear();
}

void
Navigator::NotifyActiveVRDisplaysChanged()
{
  NavigatorBinding::ClearCachedActiveVRDisplaysValue(this);
}

VRServiceTest*
Navigator::RequestVRServiceTest()
{
  // Ensure that the Mock VR devices are not released prematurely
  nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(mWindow);
  win->NotifyVREventListenerAdded();

  if (!mVRServiceTest) {
    mVRServiceTest = VRServiceTest::CreateTestService(mWindow);
  }
  return mVRServiceTest;
}

bool
Navigator::IsWebVRContentDetected() const
{
  nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(mWindow);
  return win->IsVRContentDetected();
}

bool
Navigator::IsWebVRContentPresenting() const
{
  nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(mWindow);
  return win->IsVRContentPresenting();
}

void
Navigator::RequestVRPresentation(VRDisplay& aDisplay)
{
  nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(mWindow);
  win->DispatchVRDisplayActivate(aDisplay.DisplayId(), VRDisplayEventReason::Requested);
}

already_AddRefed<Promise>
Navigator::RequestMIDIAccess(const MIDIOptions& aOptions,
                             ErrorResult& aRv)
{
  if (!mWindow) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return nullptr;
  }
  MIDIAccessManager* accessMgr = MIDIAccessManager::Get();
  return accessMgr->RequestMIDIAccess(mWindow, aOptions, aRv);
}

nsINetworkProperties*
Navigator::GetNetworkProperties()
{
  return GetConnection(IgnoreErrors());
}

network::Connection*
Navigator::GetConnection(ErrorResult& aRv)
{
  if (!mConnection) {
    if (!mWindow) {
      aRv.Throw(NS_ERROR_UNEXPECTED);
      return nullptr;
    }
    mConnection = network::Connection::CreateForWindow(mWindow);
  }

  return mConnection;
}

already_AddRefed<ServiceWorkerContainer>
Navigator::ServiceWorker()
{
  MOZ_ASSERT(mWindow);

  if (!mServiceWorkerContainer) {
    mServiceWorkerContainer = ServiceWorkerContainer::Create(mWindow->AsGlobal());
  }

  RefPtr<ServiceWorkerContainer> ref = mServiceWorkerContainer;
  return ref.forget();
}

size_t
Navigator::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
  size_t n = aMallocSizeOf(this);

  // TODO: add SizeOfIncludingThis() to nsMimeTypeArray, bug 674113.
  // TODO: add SizeOfIncludingThis() to nsPluginArray, bug 674114.
  // TODO: add SizeOfIncludingThis() to Geolocation, bug 674115.
  // TODO: add SizeOfIncludingThis() to DesktopNotificationCenter, bug 674116.

  return n;
}

void
Navigator::SetWindow(nsPIDOMWindowInner *aInnerWindow)
{
  mWindow = aInnerWindow;
}

void
Navigator::OnNavigation()
{
  if (!mWindow) {
    return;
  }

  // If MediaManager is open let it inform any live streams or pending callbacks
  MediaManager *manager = MediaManager::GetIfExists();
  if (manager) {
    manager->OnNavigation(mWindow->WindowID());
  }
}

bool
Navigator::CheckPermission(const char* type)
{
  return CheckPermission(mWindow, type);
}

/* static */
bool
Navigator::CheckPermission(nsPIDOMWindowInner* aWindow, const char* aType)
{
  if (!aWindow) {
    return false;
  }

  uint32_t permission = GetPermission(aWindow, aType);
  return permission == nsIPermissionManager::ALLOW_ACTION;
}

JSObject*
Navigator::WrapObject(JSContext* cx, JS::Handle<JSObject*> aGivenProto)
{
  return NavigatorBinding::Wrap(cx, this, aGivenProto);
}

/* static */
bool
Navigator::HasWakeLockSupport(JSContext* /* unused*/, JSObject* /*unused */)
{
  nsCOMPtr<nsIPowerManagerService> pmService =
    do_GetService(POWERMANAGERSERVICE_CONTRACTID);
  // No service means no wake lock support
  return !!pmService;
}

/* static */
bool
Navigator::HasWifiManagerSupport(JSContext* /* unused */,
                                 JSObject* aGlobal)
{
  // On XBL scope, the global object is NOT |window|. So we have
  // to use nsContentUtils::GetObjectPrincipal to get the principal
  // and test directly with permission manager.

  nsIPrincipal* principal = nsContentUtils::ObjectPrincipal(aGlobal);
  uint32_t permission = GetPermission(principal, "wifi-manage");

  return permission == nsIPermissionManager::ALLOW_ACTION;
}

/* static */
bool
Navigator::HasUserMediaSupport(JSContext* /* unused */,
                               JSObject* /* unused */)
{
  // Make enabling peerconnection enable getUserMedia() as well
  return Preferences::GetBool("media.navigator.enabled", false) ||
         Preferences::GetBool("media.peerconnection.enabled", false);
}

/* static */
already_AddRefed<nsPIDOMWindowInner>
Navigator::GetWindowFromGlobal(JSObject* aGlobal)
{
  nsCOMPtr<nsPIDOMWindowInner> win =
    do_QueryInterface(nsJSUtils::GetStaticScriptGlobal(aGlobal));
  return win.forget();
}

nsresult
Navigator::GetPlatform(nsAString& aPlatform, bool aUsePrefOverriddenValue)
{
  MOZ_ASSERT(NS_IsMainThread());

  if (aUsePrefOverriddenValue) {
    // If fingerprinting resistance is on, we will spoof this value. See nsRFPService.h
    // for details about spoofed values.
    if (nsContentUtils::ShouldResistFingerprinting()) {
      aPlatform.AssignLiteral(SPOOFED_PLATFORM);
      return NS_OK;
    }
    nsAutoString override;
    nsresult rv =
      mozilla::Preferences::GetString("general.platform.override", override);

    if (NS_SUCCEEDED(rv)) {
      aPlatform = override;
      return NS_OK;
    }
  }

  nsresult rv;

  nsCOMPtr<nsIHttpProtocolHandler>
    service(do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "http", &rv));
  NS_ENSURE_SUCCESS(rv, rv);

  // Sorry for the #if platform ugliness, but Communicator is likewise
  // hardcoded and we are seeking backward compatibility here (bug 47080).
#if defined(_WIN64)
  aPlatform.AssignLiteral("Win64");
#elif defined(WIN32)
  aPlatform.AssignLiteral("Win32");
#elif defined(XP_MACOSX) && defined(__ppc__)
  aPlatform.AssignLiteral("MacPPC");
#elif defined(XP_MACOSX) && defined(__i386__)
  aPlatform.AssignLiteral("MacIntel");
#elif defined(XP_MACOSX) && defined(__x86_64__)
  aPlatform.AssignLiteral("MacIntel");
#else
  // XXX Communicator uses compiled-in build-time string defines
  // to indicate the platform it was compiled *for*, not what it is
  // currently running *on* which is what this does.
  nsAutoCString plat;
  rv = service->GetOscpu(plat);
  CopyASCIItoUTF16(plat, aPlatform);
#endif

  return rv;
}

/* static */ nsresult
Navigator::GetAppVersion(nsAString& aAppVersion, bool aUsePrefOverriddenValue)
{
  MOZ_ASSERT(NS_IsMainThread());

  if (aUsePrefOverriddenValue) {
    // If fingerprinting resistance is on, we will spoof this value. See nsRFPService.h
    // for details about spoofed values.
    if (nsContentUtils::ShouldResistFingerprinting()) {
      aAppVersion.AssignLiteral(SPOOFED_APPVERSION);
      return NS_OK;
    }
    nsAutoString override;
    nsresult rv =
      mozilla::Preferences::GetString("general.appversion.override", override);

    if (NS_SUCCEEDED(rv)) {
      aAppVersion = override;
      return NS_OK;
    }
  }

  nsresult rv;

  nsCOMPtr<nsIHttpProtocolHandler>
    service(do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "http", &rv));
  NS_ENSURE_SUCCESS(rv, rv);

  nsAutoCString str;
  rv = service->GetAppVersion(str);
  CopyASCIItoUTF16(str, aAppVersion);
  NS_ENSURE_SUCCESS(rv, rv);

  aAppVersion.AppendLiteral(" (");

  rv = service->GetPlatform(str);
  NS_ENSURE_SUCCESS(rv, rv);

  AppendASCIItoUTF16(str, aAppVersion);
  aAppVersion.Append(char16_t(')'));

  return rv;
}

/* static */ void
Navigator::AppName(nsAString& aAppName, bool aUsePrefOverriddenValue)
{
  MOZ_ASSERT(NS_IsMainThread());

  if (aUsePrefOverriddenValue) {
    // If fingerprinting resistance is on, we will spoof this value. See nsRFPService.h
    // for details about spoofed values.
    if (nsContentUtils::ShouldResistFingerprinting()) {
      aAppName.AssignLiteral(SPOOFED_APPNAME);
      return;
    }

    nsAutoString override;
    nsresult rv =
      mozilla::Preferences::GetString("general.appname.override", override);

    if (NS_SUCCEEDED(rv)) {
      aAppName = override;
      return;
    }
  }

  aAppName.AssignLiteral("Netscape");
}

void
Navigator::ClearUserAgentCache()
{
  NavigatorBinding::ClearCachedUserAgentValue(this);
}

nsresult
Navigator::GetUserAgent(nsPIDOMWindowInner* aWindow,
                        bool aIsCallerChrome,
                        nsAString& aUserAgent)
{
  MOZ_ASSERT(NS_IsMainThread());

  // We will skip the override and pass to httpHandler to get spoofed userAgent
  // when 'privacy.resistFingerprinting' is true.
  if (!aIsCallerChrome &&
      !nsContentUtils::ShouldResistFingerprinting()) {
    nsAutoString override;
    nsresult rv =
      mozilla::Preferences::GetString("general.useragent.override", override);

    if (NS_SUCCEEDED(rv)) {
      aUserAgent = override;
      return NS_OK;
    }
  }

  nsresult rv;
  nsCOMPtr<nsIHttpProtocolHandler>
    service(do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "http", &rv));
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  nsAutoCString ua;
  rv = service->GetUserAgent(ua);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  CopyASCIItoUTF16(ua, aUserAgent);

  // When the caller is content, we will always return spoofed userAgent and
  // ignore the User-Agent header from the document channel when
  // 'privacy.resistFingerprinting' is true.
  if (!aWindow ||
      (nsContentUtils::ShouldResistFingerprinting() && !aIsCallerChrome)) {
    return NS_OK;
  }

  // Copy the User-Agent header from the document channel which has already been
  // subject to UA overrides.
  nsCOMPtr<nsIDocument> doc = aWindow->GetExtantDoc();
  if (!doc) {
    return NS_OK;
  }
  nsCOMPtr<nsIHttpChannel> httpChannel =
    do_QueryInterface(doc->GetChannel());
  if (httpChannel) {
    nsAutoCString userAgent;
    rv = httpChannel->GetRequestHeader(NS_LITERAL_CSTRING("User-Agent"),
                                       userAgent);
    if (NS_WARN_IF(NS_FAILED(rv))) {
      return rv;
    }
    CopyASCIItoUTF16(userAgent, aUserAgent);
  }
  return NS_OK;
}

static nsCString
RequestKeySystemAccessLogString(
  const nsAString& aKeySystem,
  const Sequence<MediaKeySystemConfiguration>& aConfigs,
  bool aIsSecureContext)
{
  nsCString str;
  str.AppendPrintf("Navigator::RequestMediaKeySystemAccess(keySystem='%s' options=",
                   NS_ConvertUTF16toUTF8(aKeySystem).get());
  str.Append(MediaKeySystemAccess::ToCString(aConfigs));
  str.AppendLiteral(") secureContext=");
  str.AppendInt(aIsSecureContext);
  return str;
}

already_AddRefed<Promise>
Navigator::RequestMediaKeySystemAccess(const nsAString& aKeySystem,
                                       const Sequence<MediaKeySystemConfiguration>& aConfigs,
                                       ErrorResult& aRv)
{
  EME_LOG("%s",
          RequestKeySystemAccessLogString(
            aKeySystem, aConfigs, mWindow->IsSecureContext())
            .get());

  Telemetry::Accumulate(Telemetry::MEDIA_EME_SECURE_CONTEXT,
                        mWindow->IsSecureContext());

  if (!mWindow->IsSecureContext()) {
    nsIDocument* doc = mWindow->GetExtantDoc();
    nsString uri;
    if (doc) {
      Unused << doc->GetDocumentURI(uri);
    }
    const char16_t* params[] = { uri.get() };
    nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
                                    NS_LITERAL_CSTRING("Media"),
                                    doc,
                                    nsContentUtils::eDOM_PROPERTIES,
                                    "MediaEMEInsecureContextDeprecatedWarning",
                                    params,
                                    ArrayLength(params));
  }

  RefPtr<DetailedPromise> promise =
    DetailedPromise::Create(mWindow->AsGlobal(), aRv,
      NS_LITERAL_CSTRING("navigator.requestMediaKeySystemAccess"),
      Telemetry::VIDEO_EME_REQUEST_SUCCESS_LATENCY_MS,
      Telemetry::VIDEO_EME_REQUEST_FAILURE_LATENCY_MS);
  if (aRv.Failed()) {
    return nullptr;
  }

  if (!mMediaKeySystemAccessManager) {
    mMediaKeySystemAccessManager = new MediaKeySystemAccessManager(mWindow);
  }

  mMediaKeySystemAccessManager->Request(promise, aKeySystem, aConfigs);
  return promise.forget();
}

Presentation*
Navigator::GetPresentation(ErrorResult& aRv)
{
  if (!mPresentation) {
    if (!mWindow) {
      aRv.Throw(NS_ERROR_UNEXPECTED);
      return nullptr;
    }
    mPresentation = Presentation::Create(mWindow);
  }

  return mPresentation;
}

CredentialsContainer*
Navigator::Credentials()
{
  if (!mCredentials) {
    mCredentials = new CredentialsContainer(GetWindow());
  }
  return mCredentials;
}

/* static */
bool
Navigator::Webdriver()
{
  return Preferences::GetBool("marionette.enabled", false);
}

} // namespace dom
} // namespace mozilla