class ViewPageController

class ViewPageController {

  /**
   * Handler a response for a given view and display.
   *
   * @param string $view_id
   *   The ID of the view
   * @param string $display_id
   *   The ID of the display.
   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
   *   The route match.
   *
   * @return array|\Symfony\Component\HttpFoundation\Response
   *   A render array or a Response object.
   */
  public function handle($view_id, $display_id, RouteMatchInterface $route_match) {
    $args = [];
    $route = $route_match
      ->getRouteObject();
    $map = $route
      ->hasOption('_view_argument_map') ? $route
      ->getOption('_view_argument_map') : [];
    foreach ($map as $attribute => $parameter_name) {

      // Allow parameters be pulled from the request.
      // The map stores the actual name of the parameter in the request. Views
      // which override existing controller, use for example 'node' instead of
      // arg_nid as name.
      if (isset($map[$attribute])) {
        $attribute = $map[$attribute];
      }
      if ($arg = $route_match
        ->getRawParameter($attribute)) {
      }
      else {
        $arg = $route_match
          ->getParameter($attribute);
      }
      if (isset($arg)) {
        $args[] = $arg;
      }
    }
    $class = $route
      ->getOption('_view_display_plugin_class');
    if ($route
      ->getOption('returns_response')) {

      /** @var \Drupal\views\Plugin\views\display\ResponseDisplayPluginInterface $class */
      return $class::buildResponse($view_id, $display_id, $args);
    }
    else {

      /** @var \Drupal\views\Plugin\views\display\Page $class */
      $build = $class::buildBasicRenderable($view_id, $display_id, $args, $route);
      Page::setPageRenderArray($build);
      views_add_contextual_links($build, 'page', $display_id, $build);
      return $build;
    }
  }

  /**
   * Gets the title of the given view's display.
   *
   * @param string $view_id
   *   The id of the view.
   * @param string $display_id
   *   The id of the display from the view.
   *
   * @return string|\Drupal\Component\Render\MarkupInterface
   *   The title of the display of the view.
   */
  public function getTitle($view_id, $display_id = 'default') {
    $view = Views::getView($view_id);
    $view
      ->setDisplay($display_id);
    return ViewsRenderPipelineMarkup::create(Xss::filter($view
      ->getTitle()));
  }

}