3 namespace Drupal\Core\Block;
5 use Drupal\Component\Plugin\FallbackPluginManagerInterface;
6 use Drupal\Core\Cache\CacheBackendInterface;
7 use Drupal\Core\Extension\ModuleHandlerInterface;
8 use Drupal\Core\Plugin\CategorizingPluginManagerTrait;
9 use Drupal\Core\Plugin\DefaultPluginManager;
10 use Drupal\Core\Plugin\FilteredPluginManagerTrait;
11 use Psr\Log\LoggerInterface;
14 * Manages discovery and instantiation of block plugins.
16 * @todo Add documentation to this class.
18 * @see \Drupal\Core\Block\BlockPluginInterface
20 class BlockManager extends DefaultPluginManager implements BlockManagerInterface, FallbackPluginManagerInterface {
22 use CategorizingPluginManagerTrait {
23 getSortedDefinitions as traitGetSortedDefinitions;
25 use FilteredPluginManagerTrait;
30 * @var \Psr\Log\LoggerInterface
35 * Constructs a new \Drupal\Core\Block\BlockManager object.
37 * @param \Traversable $namespaces
38 * An object that implements \Traversable which contains the root paths
39 * keyed by the corresponding namespace to look for plugin implementations.
40 * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
41 * Cache backend instance to use.
42 * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
43 * The module handler to invoke the alter hook with.
44 * @param \Psr\Log\LoggerInterface $logger
47 public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler, LoggerInterface $logger) {
48 parent::__construct('Plugin/Block', $namespaces, $module_handler, 'Drupal\Core\Block\BlockPluginInterface', 'Drupal\Core\Block\Annotation\Block');
50 $this->alterInfo($this->getType());
51 $this->setCacheBackend($cache_backend, 'block_plugins');
52 $this->logger = $logger;
58 protected function getType() {
65 public function processDefinition(&$definition, $plugin_id) {
66 parent::processDefinition($definition, $plugin_id);
67 $this->processDefinitionCategory($definition);
73 public function getSortedDefinitions(array $definitions = NULL) {
74 // Sort the plugins first by category, then by admin label.
75 $definitions = $this->traitGetSortedDefinitions($definitions, 'admin_label');
76 // Do not display the 'broken' plugin in the UI.
77 unset($definitions['broken']);
84 public function getFallbackPluginId($plugin_id, array $configuration = []) {
91 protected function handlePluginNotFound($plugin_id, array $configuration) {
92 $this->logger->warning('The "%plugin_id" was not found', ['%plugin_id' => $plugin_id]);
93 return parent::handlePluginNotFound($plugin_id, $configuration);