/**
* {@inheritdoc}
*/
public function build()
{
$build = array();
$route_name = $this->pathMatcher->isFrontPage() ? '<front>' : '<current>';
$type = $this->getDerivativeId();
$links = $this->languageManager->getLanguageSwitchLinks($type, Url::fromRoute($route_name));
if (isset($links->links)) {
$build = array('#theme' => 'links__language_block', '#links' => $links->links, '#attributes' => array('class' => array("language-switcher-{$links->method_id}")), '#set_active_class' => TRUE);
}
return $build;
}
/**
* Sets the 'is-active' class on links.
*
* @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
* The response event.
*/
public function onResponse(FilterResponseEvent $event)
{
// Only care about HTML responses.
if (stripos($event->getResponse()->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;
}
$response = $event->getResponse();
$response->setContent(static::setLinkActiveClass($response->getContent(), ltrim($this->currentPath->getPath(), '/'), $this->pathMatcher->isFrontPage(), $this->languageManager->getCurrentLanguage(LanguageInterface::TYPE_URL)->getId(), $event->getRequest()->query->all()));
}
