--- /dev/null
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\filefield_sources\FilefieldSourceManager.
+ */
+
+namespace Drupal\filefield_sources;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Plugin\DefaultPluginManager;
+
+/**
+ * Provides a plugin manager for file field source.
+ *
+ * @see \Drupal\filefield_sources\Annotation\FilefieldSource
+ * @see \Drupal\filefield_sources\FilefieldSourceInterface
+ * @see plugin_api
+ */
+class FilefieldSourceManager extends DefaultPluginManager {
+
+ /**
+ * Constructs a FilefieldSourceManager 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) {
+ $this->setCacheBackend($cache_backend, 'filefield_sources');
+
+ parent::__construct('Plugin/FilefieldSource', $namespaces, $module_handler, 'Drupal\filefield_sources\FilefieldSourceInterface', 'Drupal\filefield_sources\Annotation\FilefieldSource');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getDefinitions() {
+ $definitions = parent::getDefinitions();
+ if (!\Drupal::moduleHandler()->moduleExists('imce')) {
+ unset($definitions['imce']);
+ }
+ if (!filefield_sources_curl_enabled()) {
+ unset($definitions['remote']);
+ }
+ return $definitions;
+ }
+
+}