--- /dev/null
+<?php
+
+/**
+ * @file
+ * Provides hook implementations for Field Layout.
+ */
+
+use Drupal\Core\Entity\ContentEntityFormInterface;
+use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\field_layout\Display\EntityDisplayWithLayoutInterface;
+use Drupal\field_layout\Entity\FieldLayoutEntityFormDisplay;
+use Drupal\field_layout\Entity\FieldLayoutEntityViewDisplay;
+use Drupal\field_layout\FieldLayoutBuilder;
+use Drupal\field_layout\Form\FieldLayoutEntityFormDisplayEditForm;
+use Drupal\field_layout\Form\FieldLayoutEntityViewDisplayEditForm;
+
+/**
+ * Implements hook_help().
+ */
+function field_layout_help($route_name, RouteMatchInterface $route_match) {
+ switch ($route_name) {
+ case 'help.page.field_layout':
+ $output = '<h3>' . t('About') . '</h3>';
+ $output .= '<p>' . t('The Field Layout module allows you to arrange fields into regions on forms and displays of entities such as nodes and users.') . '</p>';
+ $output .= '<p>' . t('For more information, see the <a href=":field-layout-documentation">online documentation for the Field Layout module</a>.', [':field-layout-documentation' => 'https://www.drupal.org/documentation/modules/field_layout']) . '</p>';
+ return $output;
+ }
+}
+
+/**
+ * Implements hook_entity_type_alter().
+ */
+function field_layout_entity_type_alter(array &$entity_types) {
+ /** @var $entity_types \Drupal\Core\Entity\EntityTypeInterface[] */
+ $entity_types['entity_view_display']->setClass(FieldLayoutEntityViewDisplay::class);
+ $entity_types['entity_form_display']->setClass(FieldLayoutEntityFormDisplay::class);
+
+ // The form classes are only needed when Field UI is installed.
+ if (\Drupal::moduleHandler()->moduleExists('field_ui')) {
+ $entity_types['entity_view_display']->setFormClass('edit', FieldLayoutEntityViewDisplayEditForm::class);
+ $entity_types['entity_form_display']->setFormClass('edit', FieldLayoutEntityFormDisplayEditForm::class);
+ }
+}
+
+/**
+ * Implements hook_entity_view_alter().
+ */
+function field_layout_entity_view_alter(array &$build, EntityInterface $entity, EntityViewDisplayInterface $display) {
+ if ($display instanceof EntityDisplayWithLayoutInterface) {
+ \Drupal::classResolver()->getInstanceFromDefinition(FieldLayoutBuilder::class)
+ ->buildView($build, $display);
+ }
+}
+
+/**
+ * Implements hook_form_alter().
+ */
+function field_layout_form_alter(&$form, FormStateInterface $form_state, $form_id) {
+ $form_object = $form_state->getFormObject();
+ if ($form_object instanceof ContentEntityFormInterface && $display = $form_object->getFormDisplay($form_state)) {
+ if ($display instanceof EntityDisplayWithLayoutInterface) {
+ \Drupal::classResolver()->getInstanceFromDefinition(FieldLayoutBuilder::class)
+ ->buildForm($form, $display);
+ }
+ }
+}