Mypal/dom/base/Navigator.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/DesktopNotification.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"
#ifdef MOZ_GAMEPAD
#include "mozilla/dom/GamepadServiceTest.h"
#endif
#include "mozilla/dom/PowerManager.h"
#include "mozilla/dom/WakeLock.h"
#include "mozilla/dom/power/PowerManagerService.h"
#include "mozilla/dom/Permissions.h"
#include "mozilla/dom/ServiceWorkerContainer.h"
#include "mozilla/dom/StorageManager.h"
#include "mozilla/dom/TCPSocket.h"
#include "mozilla/dom/workers/RuntimeService.h"
#include "mozilla/Hal.h"
#include "nsISiteSpecificUserAgent.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/SSE.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 "nsStringStream.h"
#include "nsComponentManagerUtils.h"
#include "nsIStringStream.h"
#include "nsIHttpChannel.h"
#include "nsIHttpChannelInternal.h"
#include "TimeManager.h"
#include "nsStreamUtils.h"
#include "nsIAppsService.h"
#include "mozIApplication.h"
#include "WidgetUtils.h"
#include "mozilla/dom/MediaDevices.h"
#include "MediaManager.h"

#ifdef MOZ_AUDIO_CHANNEL_MANAGER
#include "AudioChannelManager.h"
#endif

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

#include "nsScriptNameSpaceManager.h"

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

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

#include "WorkerPrivate.h"
#include "WorkerRunnable.h"

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

#ifdef MOZ_EME
#include "mozilla/EMEUtils.h"
#include "mozilla/DetailedPromise.h"
#endif

namespace mozilla {
namespace dom {

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()
{
  // Add any Preferences::Add*VarCache(&sPref, "pref", default) here if needed.
}

Navigator::Navigator(nsPIDOMWindowInner* aWindow)
  : mWindow(aWindow)
{
  MOZ_ASSERT(aWindow->IsInnerWindow(), "Navigator must get an inner window!");
}

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

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Navigator)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMNavigator)
  NS_INTERFACE_MAP_ENTRY(nsIDOMNavigator)
  NS_INTERFACE_MAP_ENTRY(nsIMozNavigatorNetwork)
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(mNotification)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPowerManager)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mConnection)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mStorageManager)
#ifdef MOZ_AUDIO_CHANNEL_MANAGER
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAudioChannelManager)
#endif
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaDevices)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTimeManager)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mServiceWorkerContainer)

  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindow)
#ifdef MOZ_EME
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaKeySystemAccessManager)
#endif
#ifdef MOZ_GAMEPAD
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGamepadServiceTest)
#endif
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVRGetDisplaysPromises)
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 (mNotification) {
    mNotification->Shutdown();
    mNotification = nullptr;
  }

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

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

  mMediaDevices = nullptr;

#ifdef MOZ_AUDIO_CHANNEL_MANAGER
  if (mAudioChannelManager) {
    mAudioChannelManager = nullptr;
  }
#endif

  if (mTimeManager) {
    mTimeManager = nullptr;
  }

  mServiceWorkerContainer = nullptr;

#ifdef MOZ_EME
  if (mMediaKeySystemAccessManager) {
    mMediaKeySystemAccessManager->Shutdown();
    mMediaKeySystemAccessManager = nullptr;
  }
#endif

#ifdef MOZ_GAMEPAD
  if (mGamepadServiceTest) {
    mGamepadServiceTest->Shutdown();
    mGamepadServiceTest = nullptr;
  }
#endif

  mVRGetDisplaysPromises.Clear();
}

//*****************************************************************************
//    Navigator::nsIDOMNavigator
//*****************************************************************************

NS_IMETHODIMP
Navigator::GetUserAgent(nsAString& aUserAgent)
{
  nsCOMPtr<nsIURI> codebaseURI;
  nsCOMPtr<nsPIDOMWindowInner> window;

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

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

      nsIDocument* doc = mWindow->GetExtantDoc();
      if (doc) {
        doc->NodePrincipal()->GetURI(getter_AddRefs(codebaseURI));
      }
    }
  }

  return GetUserAgent(window, codebaseURI, nsContentUtils::IsCallerChrome(),
                      aUserAgent);
}

NS_IMETHODIMP
Navigator::GetAppCodeName(nsAString& aAppCodeName)
{
  nsresult rv;

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

  nsAutoCString appName;
  rv = service->GetAppName(appName);
  CopyASCIItoUTF16(appName, aAppCodeName);

  return rv;
}

NS_IMETHODIMP
Navigator::GetAppVersion(nsAString& aAppVersion)
{
  return GetAppVersion(aAppVersion, /* aUsePrefOverriddenValue */ true);
}

NS_IMETHODIMP
Navigator::GetAppName(nsAString& aAppName)
{
  AppName(aAppName, /* aUsePrefOverriddenValue */ true);
  return NS_OK;
}

/**
 * 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".
  const nsAdoptingString& acceptLang =
    Preferences::GetLocalizedString("intl.accept_languages");

  // 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 nsSubstring& 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.
 */
NS_IMETHODIMP
Navigator::GetLanguage(nsAString& aLanguage)
{
  nsTArray<nsString> languages;
  GetLanguages(languages);
  if (languages.Length() >= 1) {
    aLanguage.Assign(languages[0]);
  } else {
    aLanguage.Truncate();
  }

  return NS_OK;
}

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.
}

NS_IMETHODIMP
Navigator::GetPlatform(nsAString& aPlatform)
{
  return GetPlatform(aPlatform, /* aUsePrefOverriddenValue */ true);
}

NS_IMETHODIMP
Navigator::GetOscpu(nsAString& aOSCPU)
{
  if (!nsContentUtils::IsCallerChrome()) {
    const nsAdoptingString& override =
      Preferences::GetString("general.oscpu.override");

    if (override) {
      aOSCPU = override;
      return NS_OK;
    }
  }

  nsresult rv;

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

  nsAutoCString oscpu;
  rv = service->GetOscpu(oscpu);
  CopyASCIItoUTF16(oscpu, aOSCPU);

  return rv;
}

NS_IMETHODIMP
Navigator::GetVendor(nsAString& aVendor)
{
  aVendor.Truncate();
  return NS_OK;
}

NS_IMETHODIMP
Navigator::GetVendorSub(nsAString& aVendorSub)
{
  aVendorSub.Truncate();
  return NS_OK;
}

NS_IMETHODIMP
Navigator::GetProduct(nsAString& aProduct)
{
  aProduct.AssignLiteral("Gecko");
  return NS_OK;
}

NS_IMETHODIMP
Navigator::GetProductSub(nsAString& aProductSub)
{
  // Legacy build ID hardcoded for backward compatibility (bug 776376)
  aProductSub.AssignLiteral("20100101");
  return NS_OK;
}

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) {
    nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(mWindow);
    MOZ_ASSERT(global);

    mStorageManager = new StorageManager(global);
  }

  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(codebaseURI, nullptr, &access);
  NS_ENSURE_SUCCESS(rv, cookieEnabled);

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

  return cookieEnabled;
}

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

NS_IMETHODIMP
Navigator::GetBuildID(nsAString& aBuildID)
{
  if (!nsContentUtils::IsCallerChrome()) {
    const nsAdoptingString& override =
      Preferences::GetString("general.buildID.override");

    if (override) {
      aBuildID = override;
      return NS_OK;
    }
  }

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

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

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

NS_IMETHODIMP
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");
  }

  return NS_OK;
}

bool
Navigator::JavaEnabled(ErrorResult& aRv)
{
  // Return true if we have a handler for the java mime
  nsAdoptingString javaMIME = Preferences::GetString("plugin.java.mime");
  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);

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

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

  return rts->ClampedHardwareConcurrency();
}

bool
Navigator::CpuHasSSE2()
{
  return mozilla::supports_sse2();
}

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

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.");
  }
}

//*****************************************************************************
//  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;
  }

  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<ArrayBufferViewOrBlobOrStringOrFormData>& aData,
                      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 = (!aData.IsNull() && aData.Value().IsBlob())
   ? 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, // 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;
  }
  httpChannel->SetReferrer(documentURI);

  nsCString mimeType;
  if (!aData.IsNull()) {
    nsCOMPtr<nsIInputStream> in;

    if (aData.Value().IsString()) {
      nsCString stringData = NS_ConvertUTF16toUTF8(aData.Value().GetAsString());
      nsCOMPtr<nsIStringInputStream> strStream = do_CreateInstance(NS_STRINGINPUTSTREAM_CONTRACTID, &rv);
      if (NS_FAILED(rv)) {
        aRv.Throw(NS_ERROR_FAILURE);
        return false;
      }
      rv = strStream->SetData(stringData.BeginReading(), stringData.Length());
      if (NS_FAILED(rv)) {
        aRv.Throw(NS_ERROR_FAILURE);
        return false;
      }
      mimeType.AssignLiteral("text/plain;charset=UTF-8");
      in = strStream;

    } else if (aData.Value().IsArrayBufferView()) {

      nsCOMPtr<nsIStringInputStream> strStream = do_CreateInstance(NS_STRINGINPUTSTREAM_CONTRACTID, &rv);
      if (NS_FAILED(rv)) {
        aRv.Throw(NS_ERROR_FAILURE);
        return false;
      }

      const ArrayBufferView& view = aData.Value().GetAsArrayBufferView();
      view.ComputeLengthAndData();
      rv = strStream->SetData(reinterpret_cast<char*>(view.Data()),
                              view.Length());

      if (NS_FAILED(rv)) {
        aRv.Throw(NS_ERROR_FAILURE);
        return false;
      }
      mimeType.AssignLiteral("application/octet-stream");
      in = strStream;

    } else if (aData.Value().IsBlob()) {
      Blob& blob = aData.Value().GetAsBlob();
      blob.GetInternalStream(getter_AddRefs(in), aRv);
      if (NS_WARN_IF(aRv.Failed())) {
        return false;
      }

      nsAutoString type;
      blob.GetType(type);
      mimeType = NS_ConvertUTF16toUTF8(type);

    } else if (aData.Value().IsFormData()) {
      FormData& form = aData.Value().GetAsFormData();
      uint64_t len;
      nsAutoCString charset;
      form.GetSendInfo(getter_AddRefs(in),
                       &len,
                       mimeType,
                       charset);
    } else {
      MOZ_ASSERT(false, "switch statements not in sync");
      aRv.Throw(NS_ERROR_FAILURE);
      return false;
    }

    nsCOMPtr<nsIUploadChannel2> uploadChannel = do_QueryInterface(channel);
    if (!uploadChannel) {
      aRv.Throw(NS_ERROR_FAILURE);
      return false;
    }
    uploadChannel->ExplicitSetUploadStream(in, mimeType, -1,
                                           NS_LITERAL_CSTRING("POST"),
                                           false);
  } else {
    httpChannel->SetRequestMethod(NS_LITERAL_CSTRING("POST"));
  }

  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,
                           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);
}

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);
}

DesktopNotificationCenter*
Navigator::GetMozNotification(ErrorResult& aRv)
{
  if (mNotification) {
    return mNotification;
  }

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

  mNotification = new DesktopNotificationCenter(mWindow);
  return mNotification;
}

PowerManager*
Navigator::GetMozPower(ErrorResult& aRv)
{
  if (!mPowerManager) {
    if (!mWindow) {
      aRv.Throw(NS_ERROR_UNEXPECTED);
      return nullptr;
    }
    mPowerManager = PowerManager::CreateInstance(mWindow);
    if (!mPowerManager) {
      // We failed to get the power manager service?
      aRv.Throw(NS_ERROR_UNEXPECTED);
    }
  }

  return mPowerManager;
}

already_AddRefed<WakeLock>
Navigator::RequestWakeLock(const nsAString &aTopic, ErrorResult& aRv)
{
  if (!mWindow) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return nullptr;
  }

  RefPtr<power::PowerManagerService> pmService =
    power::PowerManagerService::GetInstance();
  // Maybe it went away for some reason... Or maybe we're just called
  // from our XPCOM method.
  if (!pmService) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return nullptr;
  }

  return pmService->NewWakeLock(aTopic, mWindow, aRv);
}

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

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

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

//*****************************************************************************
//    Navigator::nsIMozNavigatorNetwork
//*****************************************************************************

NS_IMETHODIMP
Navigator::GetProperties(nsINetworkProperties** aProperties)
{
  ErrorResult rv;
  NS_IF_ADDREF(*aProperties = GetConnection(rv));
  return NS_OK;
}

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

  return mConnection;
}

#ifdef MOZ_TIME_MANAGER
time::TimeManager*
Navigator::GetMozTime(ErrorResult& aRv)
{
  if (!mWindow) {
    aRv.Throw(NS_ERROR_UNEXPECTED);
    return nullptr;
  }

  if (!mTimeManager) {
    mTimeManager = new time::TimeManager(mWindow);
  }

  return mTimeManager;
}
#endif

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

  if (!mServiceWorkerContainer) {
    mServiceWorkerContainer = new ServiceWorkerContainer(mWindow);
  }

  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)
{
  NS_ASSERTION(aInnerWindow->IsInnerWindow(),
               "Navigator must get an inner window!");
  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;
}

#ifdef MOZ_AUDIO_CHANNEL_MANAGER
system::AudioChannelManager*
Navigator::GetMozAudioChannelManager(ErrorResult& aRv)
{
  if (!mAudioChannelManager) {
    if (!mWindow) {
      aRv.Throw(NS_ERROR_UNEXPECTED);
      return nullptr;
    }
    mAudioChannelManager = new system::AudioChannelManager();
    mAudioChannelManager->Init(mWindow);
  }

  return mAudioChannelManager;
}
#endif

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 */
bool
Navigator::IsE10sEnabled(JSContext* aCx, JSObject* aGlobal)
{
  return XRE_IsContentProcess();
}

bool
Navigator::MozE10sEnabled()
{
  // This will only be called if IsE10sEnabled() is true.
  return true;
}

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

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

  if (aUsePrefOverriddenValue && !nsContentUtils::IsCallerChrome()) {
    const nsAdoptingString& override =
      mozilla::Preferences::GetString("general.platform.override");

    if (override) {
      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 && !nsContentUtils::IsCallerChrome()) {
    const nsAdoptingString& override =
      mozilla::Preferences::GetString("general.appversion.override");

    if (override) {
      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 && !nsContentUtils::IsCallerChrome()) {
    const nsAdoptingString& override =
      mozilla::Preferences::GetString("general.appname.override");

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

  aAppName.AssignLiteral("Netscape");
}

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

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

  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);

  if (!aWindow || !aURI) {
    return NS_OK;
  }

  MOZ_ASSERT(aWindow->GetDocShell());

  nsCOMPtr<nsISiteSpecificUserAgent> siteSpecificUA =
    do_GetService("@mozilla.org/dom/site-specific-user-agent;1");
  if (!siteSpecificUA) {
    return NS_OK;
  }

  return siteSpecificUA->GetUserAgentForURIAndWindow(aURI, aWindow, aUserAgent);
}

#ifdef MOZ_EME
static nsCString
ToCString(const nsString& aString)
{
  nsCString str("'");
  str.Append(NS_ConvertUTF16toUTF8(aString));
  str.AppendLiteral("'");
  return str;
}

static nsCString
ToCString(const MediaKeysRequirement aValue)
{
  nsCString str("'");
  str.Append(nsDependentCString(MediaKeysRequirementValues::strings[static_cast<uint32_t>(aValue)].value));
  str.AppendLiteral("'");
  return str;
}

static nsCString
ToCString(const MediaKeySystemMediaCapability& aValue)
{
  nsCString str;
  str.AppendLiteral("{contentType=");
  str.Append(ToCString(aValue.mContentType));
  str.AppendLiteral(", robustness=");
  str.Append(ToCString(aValue.mRobustness));
  str.AppendLiteral("}");
  return str;
}

template<class Type>
static nsCString
ToCString(const Sequence<Type>& aSequence)
{
  nsCString str;
  str.AppendLiteral("[");
  for (size_t i = 0; i < aSequence.Length(); i++) {
    if (i != 0) {
      str.AppendLiteral(",");
    }
    str.Append(ToCString(aSequence[i]));
  }
  str.AppendLiteral("]");
  return str;
}

template<class Type>
static nsCString
ToCString(const Optional<Sequence<Type>>& aOptional)
{
  nsCString str;
  if (aOptional.WasPassed()) {
    str.Append(ToCString(aOptional.Value()));
  } else {
    str.AppendLiteral("[]");
  }
  return str;
}

static nsCString
ToCString(const MediaKeySystemConfiguration& aConfig)
{
  nsCString str;
  str.AppendLiteral("{label=");
  str.Append(ToCString(aConfig.mLabel));

  str.AppendLiteral(", initDataTypes=");
  str.Append(ToCString(aConfig.mInitDataTypes));

  str.AppendLiteral(", audioCapabilities=");
  str.Append(ToCString(aConfig.mAudioCapabilities));

  str.AppendLiteral(", videoCapabilities=");
  str.Append(ToCString(aConfig.mVideoCapabilities));

  str.AppendLiteral(", distinctiveIdentifier=");
  str.Append(ToCString(aConfig.mDistinctiveIdentifier));

  str.AppendLiteral(", persistentState=");
  str.Append(ToCString(aConfig.mPersistentState));

  str.AppendLiteral(", sessionTypes=");
  str.Append(ToCString(aConfig.mSessionTypes));

  str.AppendLiteral("}");

  return str;
}

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

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

  nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(mWindow);
  RefPtr<DetailedPromise> promise =
    DetailedPromise::Create(go, 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();
}
#endif

} // namespace dom
} // namespace mozilla