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<?php
namespace Drupal\Core\Block;
use Drupal\Component\Plugin\FallbackPluginManagerInterface;
use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Plugin\CategorizingPluginManagerTrait;
use Drupal\Core\Plugin\Context\ContextAwarePluginManagerTrait;
use Drupal\Core\Plugin\DefaultPluginManager;
/**
* Manages discovery and instantiation of block plugins.
*
* @todo Add documentation to this class.
*
* @see \Drupal\Core\Block\BlockPluginInterface
*/
class BlockManager extends DefaultPluginManager implements BlockManagerInterface, FallbackPluginManagerInterface {
use CategorizingPluginManagerTrait {
getSortedDefinitions as traitGetSortedDefinitions;
getGroupedDefinitions as traitGetGroupedDefinitions;
}
use ContextAwarePluginManagerTrait;
/**
* Constructs a new \Drupal\Core\Block\BlockManager object.
*
* @param \Traversable $namespaces
* An object that implements \Traversable which contains the root paths
* keyed by the corresponding namespace to look for plugin implementations.
* @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
* Cache backend instance to use.
* @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
* The module handler to invoke the alter hook with.
*/
public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
parent::__construct('Plugin/Block', $namespaces, $module_handler, 'Drupal\Core\Block\BlockPluginInterface', 'Drupal\Core\Block\Annotation\Block');
$this->alterInfo('block');
$this->setCacheBackend($cache_backend, 'block_plugins');
}
/**
* {@inheritdoc}
*/
public function processDefinition(&$definition, $plugin_id) {
parent::processDefinition($definition, $plugin_id);
$this->processDefinitionCategory($definition);
}
/**
* {@inheritdoc}
*/
public function getSortedDefinitions(array $definitions = NULL) {
// Sort the plugins first by category, then by label.
$definitions = $this->traitGetSortedDefinitions($definitions, 'admin_label');
// Do not display the 'broken' plugin in the UI.
unset($definitions['broken']);
return $definitions;
}
/**
* {@inheritdoc}
*/
public function getGroupedDefinitions(array $definitions = NULL) {
$definitions = $this->traitGetGroupedDefinitions($definitions, 'admin_label');
// Do not display the 'broken' plugin in the UI.
unset($definitions[$this->t('Block')]['broken']);
return $definitions;
}
/**
* {@inheritdoc}
*/
public function getFallbackPluginId($plugin_id, array $configuration = []) {
return 'broken';
}
}