/**
* {@inheritdoc}
*/
public function preprocessVariables(Variables $variables)
{
$breadcrumb =& $variables['breadcrumb'];
// Determine if breadcrumbs should be displayed.
$breadcrumb_visibility = $this->theme->getSetting('breadcrumb');
if ($breadcrumb_visibility == 0 || $breadcrumb_visibility == 2 && \Drupal::service('router.admin_context')->isAdminRoute() || empty($breadcrumb)) {
$breadcrumb = [];
return;
}
// Optionally get rid of the homepage link.
$show_breadcrumb_home = $this->theme->getSetting('breadcrumb_home');
if (!$show_breadcrumb_home) {
array_shift($breadcrumb);
}
if ($this->theme->getSetting('breadcrumb_title') && !empty($breadcrumb)) {
$request = \Drupal::request();
$route_match = \Drupal::routeMatch();
$page_title = \Drupal::service('title_resolver')->getTitle($request, $route_match->getRouteObject());
if (!empty($page_title)) {
$breadcrumb[] = ['text' => $page_title, 'attributes' => new Attribute(['class' => ['active']])];
// Add cache context based on url.
$variables->addCacheContexts(['url']);
}
}
}
