C++ nsAFlatCString::get方法代码示例

nsresult nsTextToSubURI::convertURItoUnicode(const nsAFlatCString &aCharset,
                                             const nsAFlatCString &aURI, 
                                             bool aIRI, 
                                             nsAString &_retval)
{
  nsresult rv = NS_OK;

  // check for 7bit encoding the data may not be ASCII after we decode
  bool isStatefulCharset = statefulCharset(aCharset.get());

  if (!isStatefulCharset && IsASCII(aURI)) {
    CopyASCIItoUTF16(aURI, _retval);
    return rv;
  }

  if (!isStatefulCharset && aIRI) {
    if (IsUTF8(aURI)) {
      CopyUTF8toUTF16(aURI, _retval);
      return rv;
    }
  }

  // empty charset could indicate UTF-8, but aURI turns out not to be UTF-8.
  NS_ENSURE_FALSE(aCharset.IsEmpty(), NS_ERROR_INVALID_ARG);

  nsCOMPtr<nsICharsetConverterManager> charsetConverterManager;

  charsetConverterManager = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIUnicodeDecoder> unicodeDecoder;
  rv = charsetConverterManager->GetUnicodeDecoder(aCharset.get(), 
                                                  getter_AddRefs(unicodeDecoder));
  NS_ENSURE_SUCCESS(rv, rv);
  unicodeDecoder->SetInputErrorBehavior(nsIUnicodeDecoder::kOnError_Signal);

  int32_t srcLen = aURI.Length();
  int32_t dstLen;
  rv = unicodeDecoder->GetMaxLength(aURI.get(), srcLen, &dstLen);
  NS_ENSURE_SUCCESS(rv, rv);

  char16_t *ustr = (char16_t *) NS_Alloc(dstLen * sizeof(char16_t));
  NS_ENSURE_TRUE(ustr, NS_ERROR_OUT_OF_MEMORY);

  rv = unicodeDecoder->Convert(aURI.get(), &srcLen, ustr, &dstLen);

  if (NS_SUCCEEDED(rv))
    _retval.Assign(ustr, dstLen);
  
  NS_Free(ustr);

  return rv;
}

nsresult nsTextToSubURI::convertURItoUnicode(const nsAFlatCString &aCharset,
                                             const nsAFlatCString &aURI, 
                                             nsAString &_retval)
{
  // check for 7bit encoding the data may not be ASCII after we decode
  bool isStatefulCharset = statefulCharset(aCharset.get());

  if (!isStatefulCharset) {
    if (IsASCII(aURI)) {
      CopyASCIItoUTF16(aURI, _retval);
      return NS_OK;
    }
    if (IsUTF8(aURI)) {
      CopyUTF8toUTF16(aURI, _retval);
      return NS_OK;
    }
  }

  // empty charset could indicate UTF-8, but aURI turns out not to be UTF-8.
  NS_ENSURE_FALSE(aCharset.IsEmpty(), NS_ERROR_INVALID_ARG);

  nsAutoCString encoding;
  if (!EncodingUtils::FindEncodingForLabelNoReplacement(aCharset, encoding)) {
    return NS_ERROR_UCONV_NOCONV;
  }
  nsCOMPtr<nsIUnicodeDecoder> unicodeDecoder =
    EncodingUtils::DecoderForEncoding(encoding);

  unicodeDecoder->SetInputErrorBehavior(nsIUnicodeDecoder::kOnError_Signal);

  int32_t srcLen = aURI.Length();
  int32_t dstLen;
  nsresult rv = unicodeDecoder->GetMaxLength(aURI.get(), srcLen, &dstLen);
  NS_ENSURE_SUCCESS(rv, rv);

  char16_t *ustr = (char16_t *) moz_xmalloc(dstLen * sizeof(char16_t));
  NS_ENSURE_TRUE(ustr, NS_ERROR_OUT_OF_MEMORY);

  rv = unicodeDecoder->Convert(aURI.get(), &srcLen, ustr, &dstLen);

  if (NS_SUCCEEDED(rv))
    _retval.Assign(ustr, dstLen);
  
  free(ustr);

  return rv;
}

static nsresult ConvertToUTF8(nsIUnicodeDecoder *aUnicodeDecoder,
                              nsAFlatCString& aString)
{
  int32_t numberOfBytes = aString.Length();
  int32_t outUnicodeLen;
  nsAutoString buffer;
  nsresult rv = aUnicodeDecoder->GetMaxLength(aString.get(), numberOfBytes,
                                              &outUnicodeLen);
  NS_ENSURE_SUCCESS(rv, rv);
  if (!EnsureStringLength(buffer, outUnicodeLen))
    return NS_ERROR_OUT_OF_MEMORY;
  rv = aUnicodeDecoder->Convert(aString.get(), &numberOfBytes,
                                buffer.BeginWriting(), &outUnicodeLen);
  NS_ENSURE_SUCCESS(rv, rv);
  buffer.SetLength(outUnicodeLen);
  CopyUTF16toUTF8(buffer, aString);
  
  return NS_OK;
}

nsresult nsTestUConv::Encode(PRUnichar ** aSrc, PRUnichar * aSrcEnd, 
                             char ** aDest, char * aDestEnd, 
                             const nsAFlatCString& aCharset)
{
  char * trace = "Encode";
  mLog.AddTrace(trace);
  nsresult res = NS_OK;

  nsCOMPtr<nsICharsetConverterManager> ccMan = 
           do_GetService(kCharsetConverterManagerCID, &res);
  if (NS_FAILED(res)) {
    mLog.PrintError("NS_WITH_SERVICE", res);
    return res;
  }

  nsCOMPtr<nsIUnicodeEncoder> enc;
  res = ccMan->GetUnicodeEncoder(aCharset.get(), getter_AddRefs(enc));
  if (NS_FAILED(res)) {
    mLog.PrintError("GetUnicodeEncoder()", res);
    return res;
  }

  res = ConvertEncode(aSrc, aSrcEnd, aDest, aDestEnd, enc);
  if (NS_FAILED(res)) {
    mLog.PrintError("Convert()", res);
    return res;
  }

  res = FinishEncode(aDest, aDestEnd, enc);
  if (NS_FAILED(res)) {
    mLog.PrintError("Finish()", res);
    return res;
  }

  mLog.DelTrace(trace);
  return res;
}

nsresult
nsPermissionManager::AddInternal(const nsAFlatCString &aHost,
                                 const nsAFlatCString &aType,
                                 PRUint32              aPermission,
                                 PRInt64               aID,
                                 PRUint32              aExpireType,
                                 PRInt64               aExpireTime,
                                 NotifyOperationType   aNotifyOperation,
                                 DBOperationType       aDBOperation)
{
  if (!IsChildProcess()) {
    IPC::Permission permission((aHost),
                               (aType),
                               aPermission, aExpireType, aExpireTime);

    nsTArray<ContentParent*> cplist;
    ContentParent::GetAll(cplist);
    for (PRUint32 i = 0; i < cplist.Length(); ++i) {
      ContentParent* cp = cplist[i];
      if (cp->NeedsPermissionsUpdate())
        unused << cp->SendAddPermission(permission);
    }
  }

  if (!gHostArena) {
    gHostArena = new PLArenaPool;
    if (!gHostArena)
      return NS_ERROR_OUT_OF_MEMORY;    
    PL_INIT_ARENA_POOL(gHostArena, "PermissionHostArena", HOST_ARENA_SIZE);
  }

  // look up the type index
  PRInt32 typeIndex = GetTypeIndex(aType.get(), true);
  NS_ENSURE_TRUE(typeIndex != -1, NS_ERROR_OUT_OF_MEMORY);

  // When an entry already exists, PutEntry will return that, instead
  // of adding a new one
  nsHostEntry *entry = mHostTable.PutEntry(aHost.get());
  if (!entry) return NS_ERROR_FAILURE;
  if (!entry->GetKey()) {
    mHostTable.RawRemoveEntry(entry);
    return NS_ERROR_OUT_OF_MEMORY;
  }

  // figure out the transaction type, and get any existing permission value
  OperationType op;
  PRInt32 index = entry->GetPermissionIndex(typeIndex);
  if (index == -1) {
    if (aPermission == nsIPermissionManager::UNKNOWN_ACTION)
      op = eOperationNone;
    else
      op = eOperationAdding;

  } else {
    nsPermissionEntry oldPermissionEntry = entry->GetPermissions()[index];

    // remove the permission if the permission is UNKNOWN, update the
    // permission if its value or expire type have changed OR if the time has
    // changed and the expire type is time, otherwise, don't modify.  There's
    // no need to modify a permission that doesn't expire with time when the
    // only thing changed is the expire time.
    if (aPermission == oldPermissionEntry.mPermission && 
        aExpireType == oldPermissionEntry.mExpireType &&
        (aExpireType != nsIPermissionManager::EXPIRE_TIME || 
         aExpireTime == oldPermissionEntry.mExpireTime))
      op = eOperationNone;
    else if (aPermission == nsIPermissionManager::UNKNOWN_ACTION)
      op = eOperationRemoving;
    else
      op = eOperationChanging;
  }

  // do the work for adding, deleting, or changing a permission:
  // update the in-memory list, write to the db, and notify consumers.
  PRInt64 id;
  switch (op) {
  case eOperationNone:
    {
      // nothing to do
      return NS_OK;
    }

  case eOperationAdding:
    {
      if (aDBOperation == eWriteToDB) {
        // we'll be writing to the database - generate a known unique id
        id = ++mLargestID;
      } else {
        // we're reading from the database - use the id already assigned
        id = aID;
      }

      entry->GetPermissions().AppendElement(nsPermissionEntry(typeIndex, aPermission, id, aExpireType, aExpireTime));

      if (aDBOperation == eWriteToDB && aExpireType != nsIPermissionManager::EXPIRE_SESSION)
        UpdateDB(op, mStmtInsert, id, aHost, aType, aPermission, aExpireType, aExpireTime);

      if (aNotifyOperation == eNotify) {
        NotifyObserversWithPermission(aHost,
                                      mTypeArray[typeIndex],
//.........这里部分代码省略.........

void
logging::Enable(const nsAFlatCString& aModules)
{
  EnableLogging(aModules.get());
}

//----------------------------------------------------------------------------------------
void nsPersistentFileDescriptor::SetData(const nsAFlatCString& inData)
//----------------------------------------------------------------------------------------
{
    mDescriptorString.CopyFrom(inData.get(), inData.Length());
}

bool
CommonElementAnimationData::CanAnimatePropertyOnCompositor(const dom::Element *aElement,
                                                           nsCSSProperty aProperty)
{
  static bool sShouldLog;
  static bool sShouldLogPrefCached;

  if (!sShouldLogPrefCached) {
    sShouldLogPrefCached = true;
    Preferences::AddBoolVarCache(&sShouldLog,
                                 "layers.offmainthreadcomposition.log-animations");
  }

  nsIFrame* frame = aElement->GetPrimaryFrame();
  if (aProperty == eCSSProperty_visibility) {
    return true;
  }
  if (aProperty == eCSSProperty_opacity) {
    bool enabled = nsLayoutUtils::AreOpacityAnimationsEnabled();
    if (!enabled && sShouldLog) {
      printf_stderr("Performance warning: Async animation of 'opacity' is disabled\n");
    }
    return enabled;
  }
  if (aProperty == eCSSProperty_transform) {
    if (frame &&
        frame->Preserves3D() &&
        frame->Preserves3DChildren()) {
      if (sShouldLog) {
        printf_stderr("Gecko bug: Async animation of 'preserve-3d' transforms is not supported.  See bug 779598\n");
      }
      return false;
    }
    if (frame && frame->IsSVGTransformed()) {
      if (sShouldLog) {
        printf_stderr("Gecko bug: Async 'transform' animations of frames with SVG transforms is not supported.  See bug 779599\n");
      }
      return false;
    }
    bool enabled = nsLayoutUtils::AreTransformAnimationsEnabled();
    if (!enabled && sShouldLog) {
      printf_stderr("Performance warning: Async animation of 'transform' is disabled\n");
    }
    return enabled;
  }
  if (sShouldLog) {
    const nsAFlatCString propName = nsCSSProps::GetStringValue(aProperty);
    printf_stderr("Performance warning: Async animation cancelled because of unsupported property '%s'\n", propName.get());
  }
  return false;
}