public function ActiveLinkResponseFilter::onResponse

Sets the 'is-active' class on links.

Parameters

\Symfony\Component\HttpKernel\Event\ResponseEvent $event: The response event.

File

core/lib/Drupal/Core/EventSubscriber/ActiveLinkResponseFilter.php, line 81

Class

ActiveLinkResponseFilter

Subscribes to filter HTML responses, to set attributes on active links.

Namespace

Code

public function onResponse(ResponseEvent $event) {
  $response = $event
    ->getResponse();

  // Only care about HTML responses.
  if (stripos($response->headers
    ->get('Content-Type', ''), 'text/html') === FALSE) {
    return;
  }

  // For authenticated users, the 'is-active' class is set in JavaScript.
  // @see system_page_attachments()
  if ($this->currentUser
    ->isAuthenticated()) {
    return;
  }

  // If content is FALSE, assume the response does not support the
  // setContent() method and skip it, for example,
  // \Symfony\Component\HttpFoundation\BinaryFileResponse.
  $content = $response
    ->getContent();
  if ($content !== FALSE) {
    $response
      ->setContent(static::setLinkActiveClass($content, ltrim($this->currentPath
      ->getPath(), '/'), $this->pathMatcher
      ->isFrontPage(), $this->languageManager
      ->getCurrentLanguage(LanguageInterface::TYPE_URL)
      ->getId(), $event
      ->getRequest()->query
      ->all()));
  }
}