class MenuActiveTrailsCacheContext in Drupal 8

Defines the MenuActiveTrailsCacheContext service.

This class is container-aware to avoid initializing the 'menu.active_trails' service (and its dependencies) when it is not necessary.

Hierarchy

• class \Drupal\Core\Cache\Context\MenuActiveTrailsCacheContext implements \Symfony\Component\DependencyInjection\ContainerAwareInterface, CalculatedCacheContextInterface uses \Symfony\Component\DependencyInjection\ContainerAwareTrait

1 string reference to 'MenuActiveTrailsCacheContext'

core.services.yml in core/core.services.yml

core/core.services.yml

1 service uses MenuActiveTrailsCacheContext

cache_context.route.menu_active_trails in core/core.services.yml

Drupal\Core\Cache\Context\MenuActiveTrailsCacheContext

File

core/lib/Drupal/Core/Cache/Context/MenuActiveTrailsCacheContext.php, line 15

Namespace

Drupal\Core\Cache\Context

class MenuActiveTrailsCacheContext implements CalculatedCacheContextInterface, ContainerAwareInterface {
  use ContainerAwareTrait;

  /**
   * {@inheritdoc}
   */
  public static function getLabel() {
    return t("Active menu trail");
  }

  /**
   * {@inheritdoc}
   */
  public function getContext($menu_name = NULL) {
    if (!$menu_name) {
      throw new \LogicException('No menu name provided for menu.active_trails cache context.');
    }
    $active_trail = $this->container
      ->get('menu.active_trail')
      ->getActiveTrailIds($menu_name);
    return 'menu_trail.' . $menu_name . '|' . implode('|', $active_trail);
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheableMetadata($menu_name = NULL) {
    if (!$menu_name) {
      throw new \LogicException('No menu name provided for menu.active_trails cache context.');
    }
    $cacheable_metadata = new CacheableMetadata();
    return $cacheable_metadata
      ->setCacheTags([
      "config:system.menu.{$menu_name}",
    ]);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
MenuActiveTrailsCacheContext::getCacheableMetadata	public	function	Gets the cacheability metadata for the context based on the parameter value. Overrides CalculatedCacheContextInterface::getCacheableMetadata
MenuActiveTrailsCacheContext::getContext	public	function	Returns the string representation of the cache context. Overrides CalculatedCacheContextInterface::getContext
MenuActiveTrailsCacheContext::getLabel	public static	function	Returns the label of the cache context. Overrides CalculatedCacheContextInterface::getLabel