Issue #2546212: Entity view/form mode formatter/widget settings have no translation UI

core/modules/config_translation/src/Controller/BundleAwareConfigEntityListBuilder.php

+<?php
+
+namespace Drupal\config_translation\Controller;
+
+use Drupal\Core\Entity\EntityStorageInterface;
+use Drupal\Core\Entity\EntityTypeBundleInfoInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Defines the config translation list builder for field entities.
+ */
+abstract class BundleAwareConfigEntityListBuilder extends ConfigTranslationEntityListBuilder {
+
+  /**
+   * The name of the entity type the configs are attached to.
+   *
+   * @var string
+   */
+  protected $baseEntityType = '';
+
+  /**
+   * An array containing the base entity type's definition.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeInterface
+   */
+  protected $baseEntityInfo;
+
+  /**
+   * The bundles info for the base entity type.
+   *
+   * @var array
+   */
+  protected $baseEntityBundles = [];
+
+  /**
+   * The entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * The entity bundle info.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeBundleInfoInterface
+   */
+  protected $entityTypeBundleInfo;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
+    $entity_type_manager = $container->get('entity_type.manager');
+    $entity_type_bundle_info = $container->get('entity_type.bundle.info');
+    return new static(
+      $entity_type,
+      $entity_type_manager->getStorage($entity_type->id()),
+      $entity_type_manager,
+      $entity_type_bundle_info
+    );
+  }
+
+  /**
+   * Constructs a new ConfigTranslationFieldListBuilder object.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
+   *   The entity type definition.
+   * @param \Drupal\Core\Entity\EntityStorageInterface $storage
+   *   The entity storage class.
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   The entity type manager.
+   * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info
+   *   The entity type bundle info.
+   */
+  public function __construct(EntityTypeInterface $entity_type, EntityStorageInterface $storage, EntityTypeManagerInterface $entity_type_manager, EntityTypeBundleInfoInterface $entity_type_bundle_info) {
+    parent::__construct($entity_type, $storage);
+    $this->entityTypeManager = $entity_type_manager;
+    $this->entityTypeBundleInfo = $entity_type_bundle_info;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setMapperDefinition($mapper_definition) {
+    $this->baseEntityType = $mapper_definition['base_entity_type'];
+    $this->baseEntityInfo = $this->entityTypeManager->getDefinition($this->baseEntityType);
+    $this->baseEntityBundles = $this->entityTypeBundleInfo->getBundleInfo($this->baseEntityType);
+    return $this;
+  }
+
+  /**
+   * Controls the visibility of the bundle column on field list pages.
+   *
+   * @return bool
+   *   Whenever the bundle is displayed or not.
+   */
+  public function displayBundle() {
+    // The bundle key is explicitly defined in the entity definition.
+    if ($this->baseEntityInfo->getKey('bundle')) {
+      return TRUE;
+    }
+
+    // There is more than one bundle defined.
+    if (count($this->baseEntityBundles) > 1) {
+      return TRUE;
+    }
+
+    // The defined bundle ones not match the entity type name.
+    if (!empty($this->baseEntityBundles) && !isset($this->baseEntityBundles[$this->baseEntityType])) {
+      return TRUE;
+    }
+
+    return FALSE;
+  }
+
+}