C++ nsCOMPtr::GetLength方法代码示例

NS_IMETHODIMP
nsSimpleArrayEnumerator::HasMoreElements(bool* aResult)
{
    NS_PRECONDITION(aResult != 0, "null ptr");
    if (! aResult)
        return NS_ERROR_NULL_POINTER;

    if (!mValueArray) {
        *aResult = false;
        return NS_OK;
    }

    PRUint32 cnt;
    nsresult rv = mValueArray->GetLength(&cnt);
    if (NS_FAILED(rv)) return rv;
    *aResult = (mIndex < cnt);
    return NS_OK;
}

NS_IMETHODIMP nsImportGenericAddressBooks::WantsProgress(bool *_retval)
{
  NS_PRECONDITION(_retval != nullptr, "null ptr");
  NS_ENSURE_ARG_POINTER(_retval);

  GetDefaultLocation();
  GetDefaultBooks();

  bool result = false;

  if (m_Books) {
    uint32_t    count = 0;
    uint32_t    i;
    bool        import;
    uint32_t    size;
    uint32_t    totalSize = 0;

    m_Books->GetLength(&count);

    for (i = 0; i < count; i++) {
      nsCOMPtr<nsIImportABDescriptor> book = do_QueryElementAt(m_Books, i);
      if (book) {
        import = false;
        size = 0;
        nsresult rv = book->GetImport(&import);
        if (NS_SUCCEEDED(rv) && import) {
          (void) book->GetSize(&size);
          result = true;
        }
        totalSize += size;
      }
    }

    m_totalSize = totalSize;
  }

  m_doImport = result;

  *_retval = result;

  return NS_OK;
}

NS_IMETHODIMP nsImportGenericAddressBooks::BeginImport(nsISupportsString *successLog, nsISupportsString *errorLog, bool *_retval)
{
  NS_PRECONDITION(_retval != nullptr, "null ptr");
    if (!_retval)
        return NS_ERROR_NULL_POINTER;

  nsString  success;
  nsString  error;

  if (!m_doImport) {
    *_retval = true;
    nsImportStringBundle::GetStringByID(IMPORT_NO_ADDRBOOKS, m_stringBundle,
                                        success);
    SetLogs(success, error, successLog, errorLog);
    return NS_OK;
  }

  if (!m_pInterface || !m_Books) {
    nsImportStringBundle::GetStringByID(IMPORT_ERROR_AB_NOTINITIALIZED,
                                        m_stringBundle, error);
    SetLogs(success, error, successLog, errorLog);
    *_retval = false;
    return NS_OK;
  }

  bool needsFieldMap = false;

  if (NS_FAILED(m_pInterface->GetNeedsFieldMap(m_pLocation, &needsFieldMap)) ||
      (needsFieldMap && !m_pFieldMap)) {
    nsImportStringBundle::GetStringByID(IMPORT_ERROR_AB_NOTINITIALIZED,
                                        m_stringBundle, error);
    SetLogs(success, error, successLog, errorLog);
    *_retval = false;
    return NS_OK;
  }

  NS_IF_RELEASE(m_pSuccessLog);
  NS_IF_RELEASE(m_pErrorLog);
  m_pSuccessLog = successLog;
  m_pErrorLog = errorLog;
  NS_IF_ADDREF(m_pSuccessLog);
  NS_IF_ADDREF(m_pErrorLog);


  // create the info need to drive address book import. We're
  // not going to create a new thread for this since address books
  // don't tend to be large, and import is rare.
  m_pThreadData = new AddressThreadData();
  m_pThreadData->books = m_Books;
  NS_ADDREF(m_Books);
  m_pThreadData->addressImport = m_pInterface;
  NS_ADDREF(m_pInterface);
  m_pThreadData->fieldMap = m_pFieldMap;
  NS_IF_ADDREF(m_pFieldMap);
  m_pThreadData->errorLog = m_pErrorLog;
  NS_IF_ADDREF(m_pErrorLog);
  m_pThreadData->successLog = m_pSuccessLog;
  NS_IF_ADDREF(m_pSuccessLog);
  if (m_pDestinationUri)
    m_pThreadData->pDestinationUri = strdup(m_pDestinationUri);

  uint32_t count = 0;
  m_Books->GetLength(&count);
  // Create/obtain any address books that we need here, so that we don't need
  // to do so inside the import thread which would just proxy the create
  // operations back to the main thread anyway.
  nsCOMPtr<nsIAddrDatabase> db = GetAddressBookFromUri(m_pDestinationUri);
  for (uint32_t i = 0; i < count; ++i)
  {
    nsCOMPtr<nsIImportABDescriptor> book = do_QueryElementAt(m_Books, i);
    if (book)
    {
      if (!db)
      {
        nsString name;
        book->GetPreferredName(name);
        db = GetAddressBook(name.get(), true);
      }
      m_DBs.AppendObject(db);
    }
  }
  m_pThreadData->dBs = &m_DBs;

  NS_IF_ADDREF(m_pThreadData->stringBundle = m_stringBundle);

  nsresult rv;
  m_pThreadData->ldifService = do_GetService(NS_ABLDIFSERVICE_CONTRACTID, &rv);

  ImportAddressThread(m_pThreadData);
  delete m_pThreadData;
  m_pThreadData = nullptr;
  *_retval = true;

  return NS_OK;
}