Provide GinContentFormBase class for entity forms

modules/core/ui/theme/farm_ui_theme.module

@@ -8,6 +8,7 @@
 use Drupal\Core\Block\BlockPluginInterface;
 use Drupal\Core\Entity\Display\EntityFormDisplayInterface;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\farm_ui_theme\Form\GinContentFormBase;
 
 /**
  * Implements hook_theme().
@@ -131,6 +132,25 @@ function farm_ui_theme_gin_content_form_routes() {
   return $routes;
 }
 
+/**
+ * Implements hook_entity_type_build().
+ */
+function farm_ui_theme_entity_type_build(array &$entity_types) {
+
+  // Override the default add and edit form class.
+  $target_entity_types = [
+    'asset' => GinContentFormBase::class,
+    'log' => GinContentFormBase::class,
+    'plan' => GinContentFormBase::class,
+  ];
+  foreach ($target_entity_types as $entity_type => $form_class) {
+    if (isset($entity_types[$entity_type])) {
+      $entity_types[$entity_type]->setFormClass('add', $form_class);
+      $entity_types[$entity_type]->setFormClass('edit', $form_class);
+    }
+  }
+}
+
 /**
  * Implements hook_element_info_alter().
  */

modules/core/ui/theme/src/Form/GinContentFormBase.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Drupal\farm_ui_theme\Form;
+
+use Drupal\Core\Entity\ContentEntityForm;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Render\Element\RenderCallbackInterface;
+
+/**
+ * Entity form for gin content form styling.
+ */
+class GinContentFormBase extends ContentEntityForm implements RenderCallbackInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getNewRevisionDefault() {
+    return TRUE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function save(array $form, FormStateInterface $form_state) {
+    $status = parent::save($form, $form_state);
+    $entity_type_label = $this->entity->getEntityType()->getSingularLabel();
+    $entity_url = $this->entity->toUrl()->setAbsolute()->toString();
+    $this->messenger()->addMessage($this->t('Saved %entity_type_label: <a href=":url">%label</a>', ['%entity_type_label' => $entity_type_label, ':url' => $entity_url, '%label' => $this->entity->label()]));
+    $form_state->setRedirectUrl($this->entity->toUrl());
+    return $status;
+  }
+
+}