public function MainContentViewSubscriber::onViewRenderArray in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php \Drupal\Core\EventSubscriber\MainContentViewSubscriber::onViewRenderArray()
2. 10 core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php \Drupal\Core\EventSubscriber\MainContentViewSubscriber::onViewRenderArray()

Sets a response given a (main content) render array.

Parameters

\Symfony\Component\HttpKernel\Event\ViewEvent $event: The event to process.

File

core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php, line 78

Class

MainContentViewSubscriber

View subscriber rendering main content render arrays into responses.

Namespace

Drupal\Core\EventSubscriber

Code

public function onViewRenderArray(ViewEvent $event) {
  $request = $event
    ->getRequest();
  $result = $event
    ->getControllerResult();

  // Render the controller result into a response if it's a render array.
  if (is_array($result) && ($request->query
    ->has(static::WRAPPER_FORMAT) || $request
    ->getRequestFormat() == 'html')) {
    $wrapper = $request->query
      ->get(static::WRAPPER_FORMAT, 'html');

    // Fall back to HTML if the requested wrapper envelope is not available.
    $wrapper = isset($this->mainContentRenderers[$wrapper]) ? $wrapper : 'html';
    $renderer = $this->classResolver
      ->getInstanceFromDefinition($this->mainContentRenderers[$wrapper]);
    $response = $renderer
      ->renderResponse($result, $request, $this->routeMatch);

    // The main content render array is rendered into a different Response
    // object, depending on the specified wrapper format.
    if ($response instanceof CacheableResponseInterface) {
      $main_content_view_subscriber_cacheability = (new CacheableMetadata())
        ->setCacheContexts([
        'url.query_args:' . static::WRAPPER_FORMAT,
      ]);
      $response
        ->addCacheableDependency($main_content_view_subscriber_cacheability);
    }
    $event
      ->setResponse($response);
  }
}