public function Breadcrumb::preprocessVariables in Express 8

Preprocess the variables array.

Parameters

\Drupal\bootstrap\Utility\Variables $variables: The Variables object.

Overrides PreprocessBase::preprocessVariables

File

themes/contrib/bootstrap/src/Plugin/Preprocess/Breadcrumb.php, line 26

Contains \Drupal\bootstrap\Plugin\Preprocess\Breadcrumb.

Class

Breadcrumb

Pre-processes variables for the "breadcrumb" theme hook.

Namespace

Drupal\bootstrap\Plugin\Preprocess

Code

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;
  }

  // Remove first occurrence of the "Home" <front> link, provided by core.
  if (!$this->theme
    ->getSetting('breadcrumb_home')) {
    $front = Url::fromRoute('<front>')
      ->toString();
    foreach ($breadcrumb as $key => $link) {
      if (isset($link['url']) && $link['url'] === $front) {
        unset($breadcrumb[$key]);
        break;
      }
    }
  }
  if ($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',
  ]);
}