Issue #2031717 by Berdir, swentel, fago: Make entity module not required.

core/modules/entity/config/schema/entity.schema.yml → core/config/schema/core.entity.schema.yml

 # Schema for Configuration files of the entity module.
 
-entity.view_mode.*.*:
+core.entity_view_mode.*.*:
   type: mapping
   label: 'Entity view mode settings'
   mapping:
@@ -29,7 +29,7 @@ entity.view_mode.*.*:
       type: config_dependencies
       label: 'Dependencies'
 
-entity.form_mode.*.*:
+core.entity_form_mode.*.*:
   type: config_entity
   label: 'Entity form mode settings'
   mapping:
@@ -47,7 +47,7 @@ entity.form_mode.*.*:
       label: 'Cache'
 
 # Overview configuration information for view mode or form mode displays.
-entity.view_display.*.*.*:
+core.entity_view_display.*.*.*:
   type: config_entity
   label: 'Entity display'
   mapping:
@@ -79,7 +79,7 @@ entity.view_display.*.*.*:
           label: 'Value'
 
 # Overview configuration information for form mode displays.
-entity.form_display.*.*.*:
+core.entity_form_display.*.*.*:
   type: config_entity
   label: 'Entity form display'
   mapping:

core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php

@@ -250,7 +250,7 @@ public function toArray() {
     $id_key = $this->getEntityType()->getKey('id');
     foreach (array_keys($definition['mapping']) as $name) {
       // Special handling for IDs so that computed compound IDs work.
-      // @see \Drupal\entity\EntityDisplayBase::id()
+      // @see \Drupal\Core\Entity\EntityDisplayBase::id()
       if ($name == $id_key) {
         $properties[$name] = $this->id();
       }

core/lib/Drupal/Core/Config/Entity/ConfigEntityBundleBase.php

@@ -7,6 +7,8 @@
 
 namespace Drupal\Core\Config\Entity;
 
+use Drupal\Core\Entity\Entity\EntityFormDisplay;
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
 use Drupal\Core\Entity\EntityStorageInterface;
 
 /**
@@ -17,6 +19,48 @@
  */
 abstract class ConfigEntityBundleBase extends ConfigEntityBase {
 
+  /**
+   * Renames displays when a bundle is renamed.
+   */
+  protected function renameDisplays() {
+    // Rename entity displays.
+    if ($this->getOriginalId() !== $this->id()) {
+      foreach ($this->loadDisplays('entity_view_display') as $display) {
+        $new_id = $this->getEntityType()->getBundleOf() . '.' . $this->id() . '.' . $display->mode;
+        $display->set('id', $new_id);
+        $display->bundle = $this->id();
+        $display->save();
+      }
+    }
+
+    // Rename entity form displays.
+    if ($this->getOriginalId() !== $this->id()) {
+      foreach ($this->loadDisplays('entity_form_display') as $form_display) {
+        $new_id = $this->getEntityType()->getBundleOf() . '.' . $this->id() . '.' . $form_display->mode;
+        $form_display->set('id', $new_id);
+        $form_display->bundle = $this->id();
+        $form_display->save();
+      }
+    }
+  }
+
+  /**
+   * Deletes display if a bundle is deleted.
+   */
+  protected function deleteDisplays() {
+    // Remove entity displays of the deleted bundle.
+    if ($displays = $this->loadDisplays('entity_view_display')) {
+      $storage = $this->entityManager()->getStorage('entity_view_display');
+      $storage->delete($displays);
+    }
+
+    // Remove entity form displays of the deleted bundle.
+    if ($displays = $this->loadDisplays('entity_form_display')) {
+      $storage = $this->entityManager()->getStorage('entity_form_display');
+      $storage->delete($displays);
+    }
+  }
+
   /**
    * {@inheritdoc}
    */
@@ -27,6 +71,7 @@ public function postSave(EntityStorageInterface $storage, $update = TRUE) {
       entity_invoke_bundle_hook('create', $this->getEntityType()->getBundleOf(), $this->id());
     }
     elseif ($this->getOriginalId() != $this->id()) {
+      $this->renameDisplays();
       entity_invoke_bundle_hook('rename', $this->getEntityType()->getBundleOf(), $this->getOriginalId(), $this->id());
     }
   }
@@ -38,8 +83,29 @@ public static function postDelete(EntityStorageInterface $storage, array $entiti
     parent::postDelete($storage, $entities);
 
     foreach ($entities as $entity) {
+      $entity->deleteDisplays();
       entity_invoke_bundle_hook('delete', $entity->getEntityType()->getBundleOf(), $entity->id());
     }
   }
 
+  /**
+   * Returns view or form displays for this bundle.
+   *
+   * @param string $entity_type_id
+   *   The entity type ID of the display type to load.
+   *
+   * @return \Drupal\Core\Entity\Display\EntityDisplayInterface[]
+   *   A list of matching displays.
+   */
+  protected function loadDisplays($entity_type_id) {
+    $ids = \Drupal::entityQuery($entity_type_id)
+      ->condition('id', $this->getEntityType()->getBundleOf() . '.' . $this->getOriginalId() . '.', 'STARTS_WITH')
+      ->execute();
+    if ($ids) {
+      $storage = $this->entityManager()->getStorage($entity_type_id);
+      return $storage->loadMultiple($ids);
+    }
+    return array();
+  }
+
 }

core/lib/Drupal/Core/Entity/ContentEntityForm.php

@@ -8,8 +8,8 @@
 namespace Drupal\Core\Entity;
 
 use Drupal\Core\Entity\Display\EntityFormDisplayInterface;
+use Drupal\Core\Entity\Entity\EntityFormDisplay;
 use Drupal\Core\Form\FormStateInterface;
-use Drupal\entity\Entity\EntityFormDisplay;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**

core/modules/entity/src/Entity/EntityFormDisplay.php → core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php

@@ -2,15 +2,15 @@
 
 /**
  * @file
- * Contains \Drupal\entity\Entity\EntityFormDisplay.
+ * Contains \Drupal\Core\Entity\Entity\EntityFormDisplay.
  */
 
-namespace Drupal\entity\Entity;
+namespace Drupal\Core\Entity\Entity;
 
 use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Entity\Display\EntityFormDisplayInterface;
+use Drupal\Core\Entity\EntityDisplayBase;
 use Drupal\Core\Form\FormStateInterface;
-use Drupal\entity\EntityDisplayBase;
 
 /**
  * Configuration entity that contains widget options for all components of a
@@ -19,7 +19,6 @@
  * @ConfigEntityType(
  *   id = "entity_form_display",
  *   label = @Translation("Entity form display"),
- *   config_prefix = "form_display",
  *   entity_keys = {
  *     "id" = "id",
  *     "status" = "status"

core/modules/entity/src/Entity/EntityFormMode.php → core/lib/Drupal/Core/Entity/Entity/EntityFormMode.php

@@ -2,16 +2,16 @@
 
 /**
  * @file
- * Contains \Drupal\entity\Entity\EntityFormMode.
+ * Contains \Drupal\Core\Entity\Entity\EntityFormMode.
  */
 
-namespace Drupal\entity\Entity;
+namespace Drupal\Core\Entity\Entity;
 
-use Drupal\entity\EntityDisplayModeBase;
-use Drupal\entity\EntityFormModeInterface;
+use Drupal\Core\Entity\EntityDisplayModeBase;
+use Drupal\Core\Entity\EntityFormModeInterface;
 
 /**
- * Defines the form mode configuration entity class.
+ * Defines the entity form mode configuration entity class.
  *
  * Form modes allow entity forms to be displayed differently depending on the
  * context. For instance, the user entity form can be displayed with a set of
@@ -26,27 +26,13 @@
  *
  * @see \Drupal\Core\Entity\EntityManagerInterface::getAllFormModes()
  * @see \Drupal\Core\Entity\EntityManagerInterface::getFormModes()
- * @see hook_entity_form_mode_info_alter()
  *
  * @ConfigEntityType(
- *   id = "form_mode",
+ *   id = "entity_form_mode",
  *   label = @Translation("Form mode"),
- *   handlers = {
- *     "list_builder" = "Drupal\entity\EntityFormModeListBuilder",
- *     "form" = {
- *       "add" = "Drupal\entity\Form\EntityFormModeAddForm",
- *       "edit" = "Drupal\entity\Form\EntityDisplayModeEditForm",
- *       "delete" = "Drupal\entity\Form\EntityDisplayModeDeleteForm"
- *     }
- *   },
- *   admin_permission = "administer display modes",
  *   entity_keys = {
  *     "id" = "id",
  *     "label" = "label"
- *   },
- *   links = {
- *     "delete-form" = "entity.form_mode.delete_form",
- *     "edit-form" = "entity.form_mode.edit_form"
  *   }
  * )
  */

core/modules/entity/src/Entity/EntityViewDisplay.php → core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php

@@ -2,15 +2,15 @@
 
 /**
  * @file
- * Contains \Drupal\entity\Entity\EntityViewDisplay.
+ * Contains \Drupal\Core\Entity\Entity\EntityViewDisplay.
  */
 
-namespace Drupal\entity\Entity;
+namespace Drupal\Core\Entity\Entity;
 
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
 use Drupal\Core\Entity\ContentEntityInterface;
-use Drupal\entity\EntityDisplayBase;
+use Drupal\Core\Entity\EntityDisplayBase;
 
 /**
  * Configuration entity that contains display options for all components of a
@@ -19,10 +19,6 @@
  * @ConfigEntityType(
  *   id = "entity_view_display",
  *   label = @Translation("Entity view display"),
- *   handlers = {
- *     "storage" = "Drupal\Core\Config\Entity\ConfigEntityStorage"
- *   },
- *   config_prefix = "view_display",
  *   entity_keys = {
  *     "id" = "id",
  *     "status" = "status"

core/modules/entity/src/Entity/EntityViewMode.php → core/lib/Drupal/Core/Entity/Entity/EntityViewMode.php

@@ -2,16 +2,16 @@
 
 /**
  * @file
- * Contains \Drupal\entity\Entity\EntityViewMode.
+ * Contains \Drupal\Core\Entity\Entity\EntityViewMode.
  */
 
-namespace Drupal\entity\Entity;
+namespace Drupal\Core\Entity\Entity;
 
-use Drupal\entity\EntityDisplayModeBase;
-use Drupal\entity\EntityViewModeInterface;
+use Drupal\Core\Entity\EntityDisplayModeBase;
+use Drupal\Core\Entity\EntityViewModeInterface;
 
 /**
- * Defines the view mode configuration entity class.
+ * Defines the entity view mode configuration entity class.
  *
  * View modes let entities be displayed differently depending on the context.
  * For instance, a node can be displayed differently on its own page ('full'
@@ -30,24 +30,11 @@
  * @see hook_entity_view_mode_info_alter()
  *
  * @ConfigEntityType(
- *   id = "view_mode",
+ *   id = "entity_view_mode",
  *   label = @Translation("View mode"),
- *   handlers = {
- *     "list_builder" = "Drupal\entity\EntityDisplayModeListBuilder",
- *     "form" = {
- *       "add" = "Drupal\entity\Form\EntityDisplayModeAddForm",
- *       "edit" = "Drupal\entity\Form\EntityDisplayModeEditForm",
- *       "delete" = "Drupal\entity\Form\EntityDisplayModeDeleteForm"
- *     }
- *   },
- *   admin_permission = "administer display modes",
  *   entity_keys = {
  *     "id" = "id",
  *     "label" = "label"
- *   },
- *   links = {
- *     "delete-form" = "entity.view_mode.delete_form",
- *     "edit-form" = "entity.view_mode.edit_form"
  *   }
  * )
  */

core/modules/entity/src/EntityDisplayBase.php → core/lib/Drupal/Core/Entity/EntityDisplayBase.php

@@ -2,13 +2,12 @@
 
 /**
  * @file
- * Contains \Drupal\entity\EntityDisplayBase.
+ * Contains \Drupal\Core\Entity\EntityDisplayBase.
  */
 
-namespace Drupal\entity;
+namespace Drupal\Core\Entity;
 
 use Drupal\Core\Config\Entity\ConfigEntityBase;
-use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Entity\Display\EntityDisplayInterface;
 use Drupal\field\Entity\FieldInstanceConfig;
@@ -186,7 +185,7 @@ public function calculateDependencies() {
     }
     // Depend on configured modes.
     if ($this->mode != 'default') {
-      $mode_entity = \Drupal::entityManager()->getStorage($this->displayContext . '_mode')->load($target_entity_type->id() . '.' . $this->mode);
+      $mode_entity = \Drupal::entityManager()->getStorage('entity_' . $this->displayContext . '_mode')->load($target_entity_type->id() . '.' . $this->mode);
       $this->addDependency('entity', $mode_entity->getConfigDependencyName());
     }
     return $this->dependencies;

core/modules/entity/src/EntityDisplayModeBase.php → core/lib/Drupal/Core/Entity/EntityDisplayModeBase.php

@@ -2,14 +2,13 @@
 
 /**
  * @file
- * Contains \Drupal\entity\EntityDisplayModeBase.
+ * Contains \Drupal\Core\Entity\EntityDisplayModeBase.
  */
 
-namespace Drupal\entity;
+namespace Drupal\Core\Entity;
 
 use Drupal\Core\Config\Entity\ConfigEntityBase;
 use Drupal\Core\Config\Entity\ConfigEntityInterface;
-use Drupal\Core\Entity\EntityStorageInterface;
 
 /**
  * Base class for config entity types that hold settings for form and view modes.
@@ -63,8 +62,8 @@ abstract class EntityDisplayModeBase extends ConfigEntityBase implements EntityD
    * {@inheritdoc}
    */
   public static function sort(ConfigEntityInterface $a, ConfigEntityInterface $b) {
-    /** @var \Drupal\entity\EntityDisplayModeInterface $a */
-    /** @var \Drupal\entity\EntityDisplayModeInterface $b */
+    /** @var \Drupal\Core\Entity\EntityDisplayModeInterface $a */
+    /** @var \Drupal\Core\Entity\EntityDisplayModeInterface $b */
     // Sort by the type of entity the view mode is used for.
     $a_type = $a->getTargetType();
     $b_type = $b->getTargetType();

core/modules/entity/src/EntityDisplayModeInterface.php → core/lib/Drupal/Core/Entity/EntityDisplayModeInterface.php

@@ -2,10 +2,10 @@
 
 /**
  * @file
- * Contains \Drupal\entity\EntityDisplayModeInterface.
+ * Contains \Drupal\Core\Entity\EntityDisplayModeInterface.
  */
 
-namespace Drupal\entity;
+namespace Drupal\Core\Entity;
 
 use Drupal\Core\Config\Entity\ConfigEntityInterface;
 

core/modules/entity/src/EntityFormModeInterface.php → core/lib/Drupal/Core/Entity/EntityFormModeInterface.php

@@ -2,10 +2,10 @@
 
 /**
  * @file
- * Contains \Drupal\entity\EntityFormModeInterface.
+ * Contains \Drupal\Core\Entity\EntityFormModeInterface.
  */
 
-namespace Drupal\entity;
+namespace Drupal\Core\Entity;
 
 /**
  * Provides an interface defining an entity form mode entity type.

core/lib/Drupal/Core/Entity/EntityManager.php

@@ -832,13 +832,14 @@ public function getFormModes($entity_type_id) {
   protected function getAllDisplayModesByEntityType($display_type) {
     if (!isset($this->displayModeInfo[$display_type])) {
       $key = 'entity_' . $display_type . '_info';
+      $entity_type_id = 'entity_' . $display_type;
       $langcode = $this->languageManager->getCurrentLanguage(LanguageInterface::TYPE_INTERFACE)->id;
       if ($cache = $this->cacheBackend->get("$key:$langcode")) {
         $this->displayModeInfo[$display_type] = $cache->data;
       }
       else {
         $this->displayModeInfo[$display_type] = array();
-        foreach ($this->getStorage($display_type)->loadMultiple() as $display_mode) {
+        foreach ($this->getStorage($entity_type_id)->loadMultiple() as $display_mode) {
           list($display_mode_entity_type, $display_mode_name) = explode('.', $display_mode->id(), 2);
           $this->displayModeInfo[$display_type][$display_mode_entity_type][$display_mode_name] = $display_mode->toArray();
         }

core/lib/Drupal/Core/Entity/EntityViewBuilder.php

@@ -10,14 +10,13 @@
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
-use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Field\FieldItemInterface;
 use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Language\LanguageInterface;
 use Drupal\Core\Language\LanguageManagerInterface;
 use Drupal\Core\TypedData\TranslatableInterface;
 use Drupal\Core\Render\Element;
-use Drupal\entity\Entity\EntityViewDisplay;
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**

core/modules/entity/src/EntityViewModeInterface.php → core/lib/Drupal/Core/Entity/EntityViewModeInterface.php

@@ -2,10 +2,10 @@
 
 /**
  * @file
- * Contains \Drupal\entity\EntityViewModeInterface.
+ * Contains \Drupal\Core\Entity\EntityViewModeInterface.
  */
 
-namespace Drupal\entity;
+namespace Drupal\Core\Entity;
 
 /**
  * Provides an interface defining an entity view mode entity type.

core/lib/Drupal/Core/Extension/ModuleHandler.php

@@ -942,7 +942,19 @@ public function uninstall(array $module_list, $uninstall_dependents = TRUE) {
     // the module already, which means that it might be loaded, but not
     // necessarily installed.
     $schema_store = \Drupal::keyValue('system.schema');
+    $entity_manager = \Drupal::entityManager();
     foreach ($module_list as $module) {
+
+      // Clean up all entity bundles (including field instances) of every entity
+      // type provided by the module that is being uninstalled.
+      foreach ($entity_manager->getDefinitions() as $entity_type_id => $entity_type) {
+        if ($entity_type->getProvider() == $module) {
+          foreach (array_keys($entity_manager->getBundleInfo($entity_type_id)) as $bundle) {
+            entity_invoke_bundle_hook('delete', $entity_type_id, $bundle);
+          }
+        }
+      }
+
       // Allow modules to react prior to the uninstallation of a module.
       $this->invokeAll('module_preuninstall', array($module));
 
@@ -954,7 +966,7 @@ public function uninstall(array $module_list, $uninstall_dependents = TRUE) {
       \Drupal::service('config.manager')->uninstall('module', $module);
 
       // Remove any entity schemas belonging to the module.
-      $entity_manager = \Drupal::entityManager();
+
       $schema = \Drupal::database()->schema();
       foreach ($entity_manager->getDefinitions() as $entity_type) {
         if ($entity_type->getProvider() == $module) {

core/modules/block_content/src/Tests/BlockContentCreationTest.php

@@ -24,7 +24,7 @@ class BlockContentCreationTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $modules = array('block_content_test', 'dblog');
+  public static $modules = array('block_content_test', 'dblog', 'entity');
 
   /**
    * Sets the test up.

core/modules/comment/comment.module

@@ -20,7 +20,7 @@
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
-use Drupal\entity\Entity\EntityViewDisplay;
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
 use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Render\Element;

core/modules/comment/src/CommentViewBuilder.php

@@ -14,7 +14,7 @@
 use Drupal\Core\Entity\EntityManagerInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Entity\EntityViewBuilder;
-use Drupal\entity\Entity\EntityViewDisplay;
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
 use Drupal\Core\Language\LanguageManagerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 

core/modules/datetime/src/Tests/DateTimeFieldTest.php

@@ -7,7 +7,7 @@
 
 namespace Drupal\datetime\Tests;
 
-use Drupal\entity\Entity\EntityViewDisplay;
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
 use Drupal\simpletest\WebTestBase;
 use Drupal\Core\Datetime\DrupalDateTime;
 

core/modules/entity/entity.info.yml

@@ -4,4 +4,3 @@ description: 'Generic entity functionality.'
 package: Core
 version: VERSION
 core: 8.x
-required: true

core/modules/entity/entity.links.action.yml

-entity.view_mode_add:
-  route_name: entity.view_mode_add
+entity.entity_view_mode_add:
+  route_name: entity.entity_view_mode_add
   title: 'Add new view mode'
   weight: 1
   appears_on:
-    - entity.view_mode_list
+    - entity.entity_view_mode_list
 
-entity.form_mode_add:
-  route_name: entity.form_mode_add
+entity.entity_form_mode_add:
+  route_name: entity.entity_form_mode_add
   title: 'Add new form mode'
   weight: 1
   appears_on:
-    - entity.form_mode_list
+    - entity.entity_form_mode_list

core/modules/entity/entity.links.menu.yml

@@ -3,13 +3,13 @@ entity.display_mode:
   description: 'Configure what displays are available for your content and forms.'
   route_name: entity.display_mode
   parent: system.admin_structure
-entity.view_mode_list:
+entity.entity_view_mode_list:
   title: 'View modes'
   description: 'Manage custom view modes.'
-  route_name: entity.view_mode_list
+  route_name: entity.entity_view_mode_list
   parent: entity.display_mode
-entity.form_mode_list:
+entity.entity_form_mode_list:
   title: 'Form modes'
   description: 'Manage custom form modes.'
-  route_name: entity.form_mode_list
+  route_name: entity.entity_form_mode_list
   parent: entity.display_mode

core/modules/entity/entity.links.task.yml

-entity.view_mode.edit_form:
+entity.entity_view_mode.edit_form:
   title: 'Edit'
-  route_name: entity.view_mode.edit_form
-  base_route: entity.view_mode.edit_form
+  route_name: entity.entity_view_mode.edit_form
+  base_route: entity.entity_view_mode.edit_form
 
-entity.form_mode.edit_form:
+entity.entity_form_mode.edit_form:
   title: 'Edit'
-  route_name: entity.form_mode.edit_form
-  base_route: entity.form_mode.edit_form
+  route_name: entity.entity_form_mode.edit_form
+  base_route: entity.entity_form_mode.edit_form
 
-entity.view_mode_list:
+entity.entity_view_mode_list:
   title: List
-  route_name: entity.view_mode_list
-  base_route: entity.view_mode_list
+  route_name: entity.entity_view_mode_list
+  base_route: entity.entity_view_mode_list
 
-entity.form_mode_list:
+entity.entity_form_mode_list:
   title: List
-  route_name: entity.form_mode_list
-  base_route: entity.form_mode_list
+  route_name: entity.entity_form_mode_list
+  base_route: entity.entity_form_mode_list

core/modules/entity/entity.module

@@ -8,7 +8,6 @@
  * entity system.
  */
 
-use Drupal\Core\Config\Entity\ConfigEntityStorage;
 use Drupal\Core\Routing\RouteMatchInterface;
 
 /**
@@ -26,9 +25,9 @@ function entity_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing view modes') . '</dt>';
-      $output .= '<dd>' . t('Each content entity can have various "modes" for viewing. For instance, a content item could be viewed in full content mode on its own page, teaser mode in a list, or RSS mode in a feed. You can create, edit the names of, and delete view modes on the <a href="!view-modes">View modes page</a>. Once a view mode has been set up, you can choose and format fields for the view mode within each entity sub-type on the Manage display page. See the <a href="!field_ui">Field UI module help page</a> for more information.', array('!view-modes' => \Drupal::url('entity.view_mode_list'), '!field_ui' => \Drupal::url('help.page', array('name' => 'field_ui')))) . '</dd>';
+      $output .= '<dd>' . t('Each content entity can have various "modes" for viewing. For instance, a content item could be viewed in full content mode on its own page, teaser mode in a list, or RSS mode in a feed. You can create, edit the names of, and delete view modes on the <a href="!view-modes">View modes page</a>. Once a view mode has been set up, you can choose and format fields for the view mode within each entity sub-type on the Manage display page. See the <a href="!field_ui">Field UI module help page</a> for more information.', array('!view-modes' => \Drupal::url('entity.entity_view_mode_list'), '!field_ui' => \Drupal::url('help.page', array('name' => 'field_ui')))) . '</dd>';
       $output .= '<dt>' . t('Managing form modes') . '</dt>';
-      $output .= '<dd>' . t('Each content entity can have various editing forms appropriate for different situations, which are known as "form modes". For instance, you might want to define a quick editing mode that allows users to edit the most important fields, and a full editing mode that gives access to all the fields. You can create, edit the names of, and delete form modes on the <a href="!form-modes">Manage custom form modes page</a>. Once a form mode has been set up, you can choose which fields are available on that form within each entity sub-type on the Manage form display page. See the <a href="!field_ui">Field UI module help page</a> for more information.', array('!form-modes' => \Drupal::url('entity.form_mode_list'), '!field_ui' => \Drupal::url('help.page', array('name' => 'field_ui')))) . '</dd>';
+      $output .= '<dd>' . t('Each content entity can have various editing forms appropriate for different situations, which are known as "form modes". For instance, you might want to define a quick editing mode that allows users to edit the most important fields, and a full editing mode that gives access to all the fields. You can create, edit the names of, and delete form modes on the <a href="!form-modes">Manage custom form modes page</a>. Once a form mode has been set up, you can choose which fields are available on that form within each entity sub-type on the Manage form display page. See the <a href="!field_ui">Field UI module help page</a> for more information.', array('!form-modes' => \Drupal::url('entity.entity_form_mode_list'), '!field_ui' => \Drupal::url('help.page', array('name' => 'field_ui')))) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
@@ -46,70 +45,26 @@ function entity_permission() {
 }
 
 /**
- * Implements hook_entity_bundle_rename().
+ * Implements hook_entity_type_alter().
  */
-function entity_entity_bundle_rename($entity_type_id, $bundle_old, $bundle_new) {
-  // Rename entity displays.
-  $entity_type = \Drupal::entityManager()->getDefinition('entity_view_display');
-  if ($bundle_old !== $bundle_new) {
-    $ids = \Drupal::configFactory()->listAll('entity.view_display.' . $entity_type_id . '.' . $bundle_old . '.');
-    foreach ($ids as $id) {
-      $id = ConfigEntityStorage::getIDFromConfigName($id, $entity_type->getConfigPrefix());
-      $display = entity_load('entity_view_display', $id);
-      $new_id = $entity_type_id . '.' . $bundle_new . '.' . $display->mode;
-      $display->set('id', $new_id);
-      $display->bundle = $bundle_new;
-      $display->save();
-    }
-  }
+function entity_entity_type_alter(array &$entity_types) {
+  /** @var $entity_types \Drupal\Core\Entity\EntityTypeInterface[] */
+  $form_mode = $entity_types['entity_form_mode'];
+  $form_mode->setListBuilderClass('Drupal\entity\EntityFormModeListBuilder');
+  $form_mode->setFormClass('add', 'Drupal\entity\Form\EntityFormModeAddForm');
+  $form_mode->setFormClass('edit', 'Drupal\entity\Form\EntityDisplayModeEditForm');
+  $form_mode->setFormClass('delete', 'Drupal\entity\Form\EntityDisplayModeDeleteForm');
+  $form_mode->set('admin_permission', 'administer display modes');
+  $form_mode->setLinkTemplate('delete-form', 'entity.entity_form_mode.delete_form');
+  $form_mode->setLinkTemplate('edit-form', 'entity.entity_form_mode.edit_form');
 
-  // Rename entity form displays.
-  $entity_type = \Drupal::entityManager()->getDefinition('entity_form_display');
-  if ($bundle_old !== $bundle_new) {
-    $ids = \Drupal::configFactory()->listAll('entity.form_display.' . $entity_type_id . '.' . $bundle_old . '.');