class LocalActionsBlock

class LocalActionsBlock extends BlockBase implements ContainerFactoryPluginInterface {
    
    /**
     * The local action manager.
     *
     * @var \Drupal\Core\Menu\LocalActionManagerInterface
     */
    protected $localActionManager;
    
    /**
     * The route match.
     *
     * @var \Drupal\Core\Routing\RouteMatchInterface
     */
    protected $routeMatch;
    
    /**
     * Creates a LocalActionsBlock instance.
     *
     * @param array $configuration
     *   A configuration array containing information about the plugin instance.
     * @param string $plugin_id
     *   The plugin_id for the plugin instance.
     * @param mixed $plugin_definition
     *   The plugin implementation definition.
     * @param \Drupal\Core\Menu\LocalActionManagerInterface $local_action_manager
     *   A local action manager.
     * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
     *   The route match.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, LocalActionManagerInterface $local_action_manager, RouteMatchInterface $route_match) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->localActionManager = $local_action_manager;
        $this->routeMatch = $route_match;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        return new static($configuration, $plugin_id, $plugin_definition, $container->get('plugin.manager.menu.local_action'), $container->get('current_route_match'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function defaultConfiguration() {
        return [
            'label_display' => FALSE,
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function build() {
        $route_name = $this->routeMatch
            ->getRouteName();
        $local_actions = $this->localActionManager
            ->getActionsForRoute($route_name);
        return $local_actions;
    }

}