Issue #2875632 by Gertjan.k, Sutharsan: Paragraph fields always display the default language

src/Plugin/Block/FieldBlock.php

@@ -8,12 +8,14 @@ use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Entity\EntityFieldManagerInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Entity\Plugin\DataType\EntityAdapter;
 use Drupal\Core\Field\BaseFieldDefinition;
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FormatterInterface;
 use Drupal\Core\Field\FormatterPluginManager;
 use Drupal\Core\Form\FormHelper;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Language\LanguageManagerInterface;
 use Drupal\Core\Form\SubformStateInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
@@ -59,6 +61,13 @@ class FieldBlock extends BlockBase implements ContainerFactoryPluginInterface {
    */
   protected $routeMatch;
 
+  /**
+   * The language manager
+   *
+   * @var \Drupal\Core\Language\LanguageManagerInterface
+   */
+  private $languageManager;
+
   /**
    * The entity to be used when displaying the block.
    *
@@ -84,12 +93,13 @@ class FieldBlock extends BlockBase implements ContainerFactoryPluginInterface {
    * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
    *   The current route match.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entityTypeManager, EntityFieldManagerInterface $entityFieldManager, FormatterPluginManager $formatter_plugin_manager, RouteMatchInterface $route_match) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entityTypeManager, EntityFieldManagerInterface $entityFieldManager, FormatterPluginManager $formatter_plugin_manager, RouteMatchInterface $route_match, LanguageManagerInterface $languageManager) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
     $this->entityTypeManager = $entityTypeManager;
     $this->entityFieldManager = $entityFieldManager;
     $this->formatterPluginManager = $formatter_plugin_manager;
     $this->routeMatch = $route_match;
+    $this->languageManager = $languageManager;
   }
 
   /**
@@ -102,7 +112,8 @@ class FieldBlock extends BlockBase implements ContainerFactoryPluginInterface {
       $container->get('entity_type.manager'),
       $container->get('entity_field.manager'),
       $container->get('plugin.manager.field.formatter'),
-      $container->get('current_route_match'));
+      $container->get('current_route_match'),
+      $container->get('language_manager'));
   }
 
   /**
@@ -370,7 +381,7 @@ class FieldBlock extends BlockBase implements ContainerFactoryPluginInterface {
     $entity = $this->getEntity();
 
     if ($entity) {
-      $build['field'] = $entity->get($this->configuration['field_name'])->view([
+      $build['field'] = $this->getTranslatedFieldFromEntity($entity)->view([
         'label' => 'hidden',
         'type' => $this->configuration['formatter_id'],
         'settings' => $this->configuration['formatter_settings'],
@@ -383,6 +394,26 @@ class FieldBlock extends BlockBase implements ContainerFactoryPluginInterface {
     return $build;
   }
 
+  /**
+   * Ensure that the field gets correctly translated into the current language
+   *
+   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+   *
+   * @return \Drupal\Core\Field\FieldItemListInterface
+   */
+  private function getTranslatedFieldFromEntity(ContentEntityInterface $entity) {
+    $language = $this->languageManager->getCurrentLanguage()->getId();
+    $field = $entity->get($this->configuration['field_name']);
+
+    if ($entity->hasTranslation($language)) {
+      $translatedEntity = $entity->getTranslation($language);
+      $adapter = EntityAdapter::createFromEntity($translatedEntity);
+      $field->setContext($this->configuration['field_name'], $adapter);
+    }
+
+    return $field;
+  }
+
   /**
    * {@inheritdoc}
    */