C++ nsACString::LowerCaseEqualsLiteral方法代码示例

SourceBuffer::SourceBuffer(MediaSource* aMediaSource, const nsACString& aType)
  : DOMEventTargetHelper(aMediaSource->GetParentObject())
  , mMediaSource(aMediaSource)
  , mCurrentAttributes(aType.LowerCaseEqualsLiteral("audio/mpeg") ||
                       aType.LowerCaseEqualsLiteral("audio/aac"))
  , mUpdating(false)
  , mActive(false)
  , mType(aType)
{
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(aMediaSource);

  mTrackBuffersManager =
    new TrackBuffersManager(aMediaSource->GetDecoder(), aType);

  // Now that we know what type we're dealing with, enable dormant as needed.
  aMediaSource->GetDecoder()->NotifyDormantSupported(Preferences::GetBool("media.decoder.heuristic.dormant.enabled", false));

  MSE_DEBUG("Create mTrackBuffersManager=%p",
            mTrackBuffersManager.get());

  ErrorResult dummy;
  if (mCurrentAttributes.mGenerateTimestamps) {
    SetMode(SourceBufferAppendMode::Sequence, dummy);
  } else {
    SetMode(SourceBufferAppendMode::Segments, dummy);
  }
  mMediaSource->GetDecoder()->GetDemuxer()->AttachSourceBuffer(
    mTrackBuffersManager.get());
}

SourceBuffer::SourceBuffer(MediaSource* aMediaSource, const nsACString& aType)
  : DOMEventTargetHelper(aMediaSource->GetParentObject())
  , mMediaSource(aMediaSource)
  , mUpdating(false)
  , mActive(false)
  , mUpdateID(0)
  , mType(aType)
{
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(aMediaSource);
  mEvictionThreshold = Preferences::GetUint("media.mediasource.eviction_threshold",
                                            100 * (1 << 20));
  bool generateTimestamps = false;
  if (aType.LowerCaseEqualsLiteral("audio/mpeg") ||
      aType.LowerCaseEqualsLiteral("audio/aac")) {
    generateTimestamps = true;
  }
  mAttributes = new SourceBufferAttributes(generateTimestamps);

  mContentManager =
    SourceBufferContentManager::CreateManager(mAttributes,
                                              aMediaSource->GetDecoder(),
                                              aType);
  MSE_DEBUG("Create mContentManager=%p",
            mContentManager.get());

  ErrorResult dummy;
  if (mAttributes->mGenerateTimestamps) {
    SetMode(SourceBufferAppendMode::Sequence, dummy);
  } else {
    SetMode(SourceBufferAppendMode::Segments, dummy);
  }
  mMediaSource->GetDecoder()->GetDemuxer()->AttachSourceBuffer(
    static_cast<mozilla::TrackBuffersManager*>(mContentManager.get()));
}

nsresult
nsUnixSystemProxySettings::GetProxyFromGConf(const nsACString& aScheme,
                                             const nsACString& aHost,
                                             PRInt32 aPort,
                                             nsACString& aResult)
{
  PRBool masterProxySwitch = PR_FALSE;
  mGConf->GetBool(NS_LITERAL_CSTRING("/system/http_proxy/use_http_proxy"), &masterProxySwitch);
  if (!IsProxyMode("manual") || !masterProxySwitch) {
    aResult.AppendLiteral("DIRECT");
    return NS_OK;
  }
  
  nsCOMPtr<nsIArray> ignoreList;
  if (NS_SUCCEEDED(mGConf->GetStringList(NS_LITERAL_CSTRING("/system/http_proxy/ignore_hosts"),
                                         getter_AddRefs(ignoreList))) && ignoreList) {
    PRUint32 len = 0;
    ignoreList->GetLength(&len);
    for (PRUint32 i = 0; i < len; ++i) {
      nsCOMPtr<nsISupportsString> str = do_QueryElementAt(ignoreList, i);
      if (str) {
        nsAutoString s;
        if (NS_SUCCEEDED(str->GetData(s)) && !s.IsEmpty()) {
          if (GConfIgnoreHost(NS_ConvertUTF16toUTF8(s), aHost)) {
            aResult.AppendLiteral("DIRECT");
            return NS_OK;
          }
        }
      }
    }
  }

  PRBool useHttpProxyForAll = PR_FALSE;
  // This setting sometimes doesn't exist, don't bail on failure
  mGConf->GetBool(NS_LITERAL_CSTRING("/system/http_proxy/use_same_proxy"), &useHttpProxyForAll);

  nsresult rv;
  if (!useHttpProxyForAll) {
    rv = SetProxyResultFromGConf("/system/proxy/socks_", "SOCKS", aResult);
    if (NS_SUCCEEDED(rv))
      return rv;
  }
  
  if (aScheme.LowerCaseEqualsLiteral("http") || useHttpProxyForAll) {
    rv = SetProxyResultFromGConf("/system/http_proxy/", "PROXY", aResult);
  } else if (aScheme.LowerCaseEqualsLiteral("https")) {
    rv = SetProxyResultFromGConf("/system/proxy/secure_", "PROXY", aResult);
  } else if (aScheme.LowerCaseEqualsLiteral("ftp")) {
    rv = SetProxyResultFromGConf("/system/proxy/ftp_", "PROXY", aResult);
  } else {
    rv = NS_ERROR_FAILURE;
  }
  
  if (NS_FAILED(rv)) {
    aResult.AppendLiteral("DIRECT");
  }
  return NS_OK;
}

nsresult
nsUnixSystemProxySettings::GetProxyFromGSettings(const nsACString& aScheme,
                                                 const nsACString& aHost,
                                                 int32_t aPort,
                                                 nsACString& aResult)
{
  nsCString proxyMode; 
  nsresult rv = mProxySettings->GetString(NS_LITERAL_CSTRING("mode"), proxyMode);
  NS_ENSURE_SUCCESS(rv, rv);
  
  // return NS_ERROR_FAILURE when no proxy is set
  if (!proxyMode.EqualsLiteral("manual")) {
    return NS_ERROR_FAILURE;
  }

  nsCOMPtr<nsIArray> ignoreList;
  if (NS_SUCCEEDED(mProxySettings->GetStringList(NS_LITERAL_CSTRING("ignore-hosts"),
                                                 getter_AddRefs(ignoreList))) && ignoreList) {
    uint32_t len = 0;
    ignoreList->GetLength(&len);
    for (uint32_t i = 0; i < len; ++i) {
      nsCOMPtr<nsISupportsCString> str = do_QueryElementAt(ignoreList, i);
      if (str) {
        nsCString s;
        if (NS_SUCCEEDED(str->GetData(s)) && !s.IsEmpty()) {
          if (HostIgnoredByProxy(s, aHost)) {
            aResult.AppendLiteral("DIRECT");
            return NS_OK;
          }
        }
      }
    }
  }

  if (aScheme.LowerCaseEqualsLiteral("http")) {
    rv = SetProxyResultFromGSettings("org.gnome.system.proxy.http", "PROXY", aResult);
  } else if (aScheme.LowerCaseEqualsLiteral("https")) {
    rv = SetProxyResultFromGSettings("org.gnome.system.proxy.https", "PROXY", aResult);
    /* Try to use HTTP proxy when HTTPS proxy is not explicitly defined */
    if (rv != NS_OK) 
      rv = SetProxyResultFromGSettings("org.gnome.system.proxy.http", "PROXY", aResult);
  } else if (aScheme.LowerCaseEqualsLiteral("ftp")) {
    rv = SetProxyResultFromGSettings("org.gnome.system.proxy.ftp", "PROXY", aResult);
  } else {
    rv = NS_ERROR_FAILURE;
  }
  if (rv != NS_OK) {
     /* If proxy for scheme is not specified, use SOCKS proxy for all schemes */
     rv = SetProxyResultFromGSettings("org.gnome.system.proxy.socks", "SOCKS", aResult);
  }
  
  if (NS_FAILED(rv)) {
    aResult.AppendLiteral("DIRECT");
  }
  
  return NS_OK;
}

nsresult
gfxFontconfigUtils::GetFontList(nsIAtom *aLangGroup,
                                const nsACString& aGenericFamily,
                                nsTArray<nsString>& aListOfFonts)
{
    aListOfFonts.Clear();

    nsTArray<nsCString> fonts;
    nsresult rv = GetFontListInternal(fonts, aLangGroup);
    if (NS_FAILED(rv))
        return rv;

    for (uint32_t i = 0; i < fonts.Length(); ++i) {
        aListOfFonts.AppendElement(NS_ConvertUTF8toUTF16(fonts[i]));
    }

    aListOfFonts.Sort();

    int32_t serif = 0, sansSerif = 0, monospace = 0;

    // Fontconfig supports 3 generic fonts, "serif", "sans-serif", and
    // "monospace", slightly different from CSS's 5.
    if (aGenericFamily.IsEmpty())
        serif = sansSerif = monospace = 1;
    else if (aGenericFamily.LowerCaseEqualsLiteral("serif"))
        serif = 1;
    else if (aGenericFamily.LowerCaseEqualsLiteral("sans-serif"))
        sansSerif = 1;
    else if (aGenericFamily.LowerCaseEqualsLiteral("monospace"))
        monospace = 1;
    else if (aGenericFamily.LowerCaseEqualsLiteral("cursive") ||
             aGenericFamily.LowerCaseEqualsLiteral("fantasy"))
        serif = sansSerif = 1;
    else
        NS_NOTREACHED("unexpected CSS generic font family");

    // The first in the list becomes the default in
    // FontBuilder.readFontSelection() if the preference-selected font is not
    // available, so put system configured defaults first.
    if (monospace)
        aListOfFonts.InsertElementAt(0, NS_LITERAL_STRING("monospace"));
    if (sansSerif)
        aListOfFonts.InsertElementAt(0, NS_LITERAL_STRING("sans-serif"));
    if (serif)
        aListOfFonts.InsertElementAt(0, NS_LITERAL_STRING("serif"));

    return NS_OK;
}

already_AddRefed<SourceBufferContentManager>
SourceBufferContentManager::CreateManager(dom::SourceBufferAttributes* aAttributes,
                                          MediaSourceDecoder* aParentDecoder,
                                          const nsACString &aType)
{
  nsRefPtr<SourceBufferContentManager> manager;
  bool useFormatReader =
    Preferences::GetBool("media.mediasource.format-reader", false);
  if (useFormatReader) {
    manager = new TrackBuffersManager(aAttributes, aParentDecoder, aType);
  } else {
    manager = new TrackBuffer(aParentDecoder, aType);
  }

  // Now that we know what type we're dealing with, enable dormant as needed.
#if defined(MP4_READER_DORMANT_HEURISTIC)
  if (aType.LowerCaseEqualsLiteral("video/mp4") ||
      aType.LowerCaseEqualsLiteral("audio/mp4") ||
      useFormatReader)
  {
    aParentDecoder->NotifyDormantSupported(Preferences::GetBool("media.decoder.heuristic.dormant.enabled", false));
  }
#endif


  return  manager.forget();
}

NS_IMETHODIMP
InterceptedJARChannel::SynthesizeHeader(const nsACString& aName,
                                        const nsACString& aValue)
{
  if (aName.LowerCaseEqualsLiteral("content-type")) {
    mContentType = aValue;
  }
  return NS_OK;
}

NS_IMETHODIMP
nsWebNavigationInfo::IsTypeSupported(const nsACString& aType,
                                     nsIWebNavigation* aWebNav,
                                     uint32_t* aIsTypeSupported)
{
  NS_PRECONDITION(aIsTypeSupported, "null out param?");

  // Note to self: aWebNav could be an nsWebBrowser or an nsDocShell here (or
  // an nsSHistory, but not much we can do with that).  So if we start using
  // it here, we need to be careful to get to the docshell correctly.

  // For now just report what the Gecko-Content-Viewers category has
  // to say for itself.
  *aIsTypeSupported = nsIWebNavigationInfo::UNSUPPORTED;

  // We want to claim that the type for PDF documents is unsupported,
  // so that the internal PDF viewer's stream converted will get used.
  if (aType.LowerCaseEqualsLiteral("application/pdf") &&
      nsContentUtils::IsPDFJSEnabled()) {
    return NS_OK;
  }

  const nsCString& flatType = PromiseFlatCString(aType);
  nsresult rv = IsTypeSupportedInternal(flatType, aIsTypeSupported);
  NS_ENSURE_SUCCESS(rv, rv);

  if (*aIsTypeSupported) {
    return rv;
  }

  // If this request is for a docShell that isn't going to allow plugins,
  // there's no need to try and find a plugin to handle it.
  nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aWebNav));
  bool allowed;
  if (docShell &&
      NS_SUCCEEDED(docShell->GetAllowPlugins(&allowed)) && !allowed) {
    return NS_OK;
  }

  // Try reloading plugins in case they've changed.
  nsCOMPtr<nsIPluginHost> pluginHost =
    do_GetService(MOZ_PLUGIN_HOST_CONTRACTID);
  if (pluginHost) {
    // false will ensure that currently running plugins will not
    // be shut down
    rv = pluginHost->ReloadPlugins();
    if (NS_SUCCEEDED(rv)) {
      // OK, we reloaded plugins and there were new ones
      // (otherwise NS_ERROR_PLUGINS_PLUGINSNOTCHANGED would have
      // been returned).  Try checking whether we can handle the
      // content now.
      return IsTypeSupportedInternal(flatType, aIsTypeSupported);
    }
  }

  return NS_OK;
}

SourceBuffer::SourceBuffer(MediaSource* aMediaSource, const nsACString& aType)
    : DOMEventTargetHelper(aMediaSource->GetParentObject())
    , mMediaSource(aMediaSource)
    , mAppendWindowStart(0)
    , mAppendWindowEnd(PositiveInfinity<double>())
    , mApparentTimestampOffset(0)
    , mAppendMode(SourceBufferAppendMode::Segments)
    , mUpdating(false)
    , mActive(false)
    , mUpdateID(0)
    , mReportedOffset(0)
    , mType(aType)
{
    MOZ_ASSERT(NS_IsMainThread());
    MOZ_ASSERT(aMediaSource);
    mEvictionThreshold = Preferences::GetUint("media.mediasource.eviction_threshold",
                         100 * (1 << 20));
    mContentManager =
        SourceBufferContentManager::CreateManager(this,
                aMediaSource->GetDecoder(),
                aType);
    MSE_DEBUG("Create mContentManager=%p",
              mContentManager.get());
    if (aType.LowerCaseEqualsLiteral("audio/mpeg") ||
            aType.LowerCaseEqualsLiteral("audio/aac")) {
        mGenerateTimestamp = true;
    } else {
        mGenerateTimestamp = false;
    }
    mIsUsingFormatReader =
        Preferences::GetBool("media.mediasource.format-reader", false);
    ErrorResult dummy;
    if (mGenerateTimestamp) {
        SetMode(SourceBufferAppendMode::Sequence, dummy);
    } else {
        SetMode(SourceBufferAppendMode::Segments, dummy);
    }
    if (mIsUsingFormatReader) {
        mMediaSource->GetDecoder()->GetDemuxer()->AttachSourceBuffer(
            static_cast<mozilla::TrackBuffersManager*>(mContentManager.get()));
    }
}

NS_IMETHODIMP
nsCryptoHash::InitWithString(const nsACString & aAlgorithm)
{
  nsNSSShutDownPreventionLock locker;
  if (isAlreadyShutDown()) {
    return NS_ERROR_NOT_AVAILABLE;
  }

  if (aAlgorithm.LowerCaseEqualsLiteral("md2"))
    return Init(nsICryptoHash::MD2);

  if (aAlgorithm.LowerCaseEqualsLiteral("md5"))
    return Init(nsICryptoHash::MD5);

  if (aAlgorithm.LowerCaseEqualsLiteral("sha1"))
    return Init(nsICryptoHash::SHA1);

  if (aAlgorithm.LowerCaseEqualsLiteral("sha256"))
    return Init(nsICryptoHash::SHA256);

  if (aAlgorithm.LowerCaseEqualsLiteral("sha384"))
    return Init(nsICryptoHash::SHA384);

  if (aAlgorithm.LowerCaseEqualsLiteral("sha512"))
    return Init(nsICryptoHash::SHA512);

  return NS_ERROR_INVALID_ARG;
}

NS_IMETHODIMP  nsTextToSubURI::UnEscapeNonAsciiURI(const nsACString & aCharset, 
                                                   const nsACString & aURIFragment, 
                                                   nsAString &_retval)
{
  nsAutoCString unescapedSpec;
  NS_UnescapeURL(PromiseFlatCString(aURIFragment),
                 esc_AlwaysCopy | esc_OnlyNonASCII, unescapedSpec);
  // leave the URI as it is if it's not UTF-8 and aCharset is not a ASCII
  // superset since converting "http:" with such an encoding is always a bad 
  // idea.
  if (!IsUTF8(unescapedSpec) && 
      (aCharset.LowerCaseEqualsLiteral("utf-16") ||
       aCharset.LowerCaseEqualsLiteral("utf-16be") ||
       aCharset.LowerCaseEqualsLiteral("utf-16le") ||
       aCharset.LowerCaseEqualsLiteral("utf-7") ||
       aCharset.LowerCaseEqualsLiteral("x-imap4-modified-utf7"))){
    CopyASCIItoUTF16(aURIFragment, _retval);
    return NS_OK;
  }

  return convertURItoUnicode(PromiseFlatCString(aCharset), unescapedSpec, true, _retval);
}

bool
EncodingUtils::IsAsciiCompatible(const nsACString& aPreferredName)
{
  // HZ and UTF-7 are no longer in mozilla-central, but keeping them here
  // just in case for the benefit of comm-central.
  return !(aPreferredName.LowerCaseEqualsLiteral("utf-16") ||
           aPreferredName.LowerCaseEqualsLiteral("utf-16be") ||
           aPreferredName.LowerCaseEqualsLiteral("utf-16le") ||
           aPreferredName.LowerCaseEqualsLiteral("replacement") ||
           aPreferredName.LowerCaseEqualsLiteral("hz-gb-2312") ||
           aPreferredName.LowerCaseEqualsLiteral("utf-7") ||
           aPreferredName.LowerCaseEqualsLiteral("x-imap4-modified-utf7"));
}

NS_IMETHODIMP
nsCryptoHash::InitWithString(const nsACString & aAlgorithm)
{
  if (aAlgorithm.LowerCaseEqualsLiteral("md2"))
    return Init(nsICryptoHash::MD2);

  if (aAlgorithm.LowerCaseEqualsLiteral("md5"))
    return Init(nsICryptoHash::MD5);

  if (aAlgorithm.LowerCaseEqualsLiteral("sha1"))
    return Init(nsICryptoHash::SHA1);

  if (aAlgorithm.LowerCaseEqualsLiteral("sha256"))
    return Init(nsICryptoHash::SHA256);

  if (aAlgorithm.LowerCaseEqualsLiteral("sha384"))
    return Init(nsICryptoHash::SHA384);

  if (aAlgorithm.LowerCaseEqualsLiteral("sha512"))
    return Init(nsICryptoHash::SHA512);

  return NS_ERROR_INVALID_ARG;
}

already_AddRefed<nsIMIMEInfo> nsOSHelperAppService::GetMIMEInfoFromOS(const nsACString& aMIMEType, const nsACString& aFileExt, bool *aFound)
{
  *aFound = true;

  const nsCString& flatType = PromiseFlatCString(aMIMEType);
  const nsCString& flatExt = PromiseFlatCString(aFileExt);

  nsAutoString fileExtension;
  /* XXX The Equals is a gross hack to wallpaper over the most common Win32
   * extension issues caused by the fix for bug 116938.  See bug
   * 120327, comment 271 for why this is needed.  Not even sure we
   * want to remove this once we have fixed all this stuff to work
   * right; any info we get from the OS on this type is pretty much
   * useless....
   * We'll do extension-based lookup for this type later in this function.
   */
  if (!aMIMEType.LowerCaseEqualsLiteral(APPLICATION_OCTET_STREAM)) {
    // (1) try to use the windows mime database to see if there is a mapping to a file extension
    // (2) try to see if we have some left over 4.x registry info we can peek at...
    GetExtensionFromWindowsMimeDatabase(aMIMEType, fileExtension);
    LOG(("Windows mime database: extension '%s'\n", fileExtension.get()));
    if (fileExtension.IsEmpty()) {
      GetExtensionFrom4xRegistryInfo(aMIMEType, fileExtension);
      LOG(("4.x Registry: extension '%s'\n", fileExtension.get()));
    }
  }
  // If we found an extension for the type, do the lookup
  nsRefPtr<nsMIMEInfoWin> mi;
  if (!fileExtension.IsEmpty())
    mi = GetByExtension(fileExtension, flatType.get());
  LOG(("Extension lookup on '%s' found: 0x%p\n", fileExtension.get(), mi.get()));

  bool hasDefault = false;
  if (mi) {
    mi->GetHasDefaultHandler(&hasDefault);
    // OK. We might have the case that |aFileExt| is a valid extension for the
    // mimetype we were given. In that case, we do want to append aFileExt
    // to the mimeinfo that we have. (E.g.: We are asked for video/mpeg and
    // .mpg, but the primary extension for video/mpeg is .mpeg. But because
    // .mpg is an extension for video/mpeg content, we want to append it)
    if (!aFileExt.IsEmpty() && typeFromExtEquals(NS_ConvertUTF8toUTF16(flatExt).get(), flatType.get())) {
      LOG(("Appending extension '%s' to mimeinfo, because its mimetype is '%s'\n",
           flatExt.get(), flatType.get()));
      bool extExist = false;
      mi->ExtensionExists(aFileExt, &extExist);
      if (!extExist)
        mi->AppendExtension(aFileExt);
    }
  }
  if (!mi || !hasDefault) {
    nsRefPtr<nsMIMEInfoWin> miByExt =
      GetByExtension(NS_ConvertUTF8toUTF16(aFileExt), flatType.get());
    LOG(("Ext. lookup for '%s' found 0x%p\n", flatExt.get(), miByExt.get()));
    if (!miByExt && mi)
      return mi.forget();
    if (miByExt && !mi) {
      return miByExt.forget();
    }
    if (!miByExt && !mi) {
      *aFound = false;
      mi = new nsMIMEInfoWin(flatType);
      if (!aFileExt.IsEmpty()) {
        mi->AppendExtension(aFileExt);
      }
      
      return mi.forget();
    }

    // if we get here, mi has no default app. copy from extension lookup.
    nsCOMPtr<nsIFile> defaultApp;
    nsAutoString desc;
    miByExt->GetDefaultDescription(desc);

    mi->SetDefaultDescription(desc);
  }
  return mi.forget();
}