diff core/modules/language/src/Plugin/Derivative/LanguageBlock.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/language/src/Plugin/Derivative/LanguageBlock.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,36 @@
+<?php
+
+namespace Drupal\language\Plugin\Derivative;
+
+use Drupal\Component\Plugin\Derivative\DeriverBase;
+use Drupal\language\ConfigurableLanguageManagerInterface;
+
+/**
+ * Provides language switcher block plugin definitions for all languages.
+ */
+class LanguageBlock extends DeriverBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDerivativeDefinitions($base_plugin_definition) {
+    $language_manager = \Drupal::languageManager();
+
+    if ($language_manager instanceof ConfigurableLanguageManagerInterface) {
+      $info = $language_manager->getDefinedLanguageTypesInfo();
+      $configurable_types = $language_manager->getLanguageTypes();
+      foreach ($configurable_types as $type) {
+        $this->derivatives[$type] = $base_plugin_definition;
+        $this->derivatives[$type]['admin_label'] = t('Language switcher (@type)', ['@type' => $info[$type]['name']]);
+      }
+      // If there is just one configurable type then change the title of the
+      // block.
+      if (count($configurable_types) == 1) {
+        $this->derivatives[reset($configurable_types)]['admin_label'] = t('Language switcher');
+      }
+    }
+
+    return parent::getDerivativeDefinitions($base_plugin_definition);
+  }
+
+}