ViewPageController.php

<?php

namespace Drupal\views\Routing;

use Drupal\Component\Utility\Xss;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\views\Plugin\views\display\Page;
use Drupal\views\Render\ViewsRenderPipelineMarkup;
use Drupal\views\Views;

/**
 * Defines a page controller to execute and render a view.
 */
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()));
    }

}