gistfile1.cpp

bool HtmlDialog::Wait() {
  // If the window handle is no longer valid, the window is closing,
  // the wait is completed, and we must post the quit message.
  if (!::IsWindow(this->GetTopLevelWindowHandle())) {
    this->is_navigating_ = false;
    this->set_is_closing(true);
    this->PostQuitMessage();
    return true;
  }

  // If we're not navigating to a new location, we should check to see if
  // a new modal dialog has been opened. If one has, the wait is complete,
  // so we must set the flag indicating to the message loop not to call wait
  // anymore.
  if (!this->is_navigating_) {
    HWND child_dialog_handle = this->GetActiveDialogWindowHandle();
    if (child_dialog_handle != NULL) {
      HWND content_window_handle = this->FindContentWindowHandle(child_dialog_handle);
      // This if statement is the difference from the existing code.
      // If the content window handle is NULL, then maybe it
      // hasn't had the chance to be created yet, so don't post
      // the message, and continue to wait.
      if (content_window_handle != NULL) {
        ::Sleep(500);
        ::PostMessage(this->executor_handle(),
                      WD_NEW_HTML_DIALOG,
                      NULL,
                      reinterpret_cast<LPARAM>(content_window_handle));
        this->set_wait_required(false);
        return true;
      }
    }
  }

  // Otherwise, we wait until navigation is complete.
  ::Sleep(250);
  return !this->is_navigating_;
}