Issue #2835869 by hchonov, gease, tstoeckler: Prepare content translation for nested inline entity forms
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			@ -314,18 +314,18 @@ class ContentTranslationHandler implements ContentTranslationHandlerInterface, E
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  public function entityFormAlter(array &$form, FormStateInterface $form_state, EntityInterface $entity) {
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    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
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    $metadata = $this->manager->getTranslationMetadata($entity);
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    $form_object = $form_state->getFormObject();
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    $form_langcode = $form_object->getFormLangcode($form_state);
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    $entity_langcode = $entity->getUntranslated()->language()->getId();
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    $source_langcode = $this->getSourceLangcode($form_state);
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    $new_translation = !empty($source_langcode);
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    $new_translation = $entity->isNewTranslation();
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    $translations = $entity->getTranslationLanguages();
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    if ($new_translation) {
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      // Make sure a new translation does not appear as existing yet.
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      unset($translations[$form_langcode]);
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    }
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    $is_translation = !$form_object->isDefaultFormLangcode($form_state);
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    $is_translation = $new_translation || ($entity->language()->getId() != $entity_langcode);
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    $has_translations = count($translations) > 1;
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    // Adjust page title to specify the current language being edited, if we
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			@ -336,7 +336,7 @@ class ContentTranslationHandler implements ContentTranslationHandlerInterface, E
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      // When editing the original values display just the entity label.
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      if ($is_translation) {
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        $t_args = ['%language' => $languages[$form_langcode]->getName(), '%title' => $entity->label(), '@title' => $title];
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        $title = empty($source_langcode) ? t('@title [%language translation]', $t_args) : t('Create %language translation of %title', $t_args);
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        $title = $new_translation ? t('Create %language translation of %title', $t_args) : t('@title [%language translation]', $t_args);
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      }
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      $form['#title'] = $title;
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    }
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			@ -344,6 +344,7 @@ class ContentTranslationHandler implements ContentTranslationHandlerInterface, E
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    // Display source language selector only if we are creating a new
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    // translation and there are at least two translations available.
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    if ($has_translations && $new_translation) {
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      $source_langcode = $metadata->getSource();
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      $form['source_langcode'] = [
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        '#type' => 'details',
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        '#title' => t('Source language: @language', ['@language' => $languages[$source_langcode]->getName()]),
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			@ -435,7 +436,7 @@ class ContentTranslationHandler implements ContentTranslationHandlerInterface, E
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        '#title' => t('Translation'),
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        '#tree' => TRUE,
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        '#weight' => 10,
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        '#access' => $this->getTranslationAccess($entity, $source_langcode ? 'create' : 'update')->isAllowed(),
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        '#access' => $this->getTranslationAccess($entity, $new_translation ? 'create' : 'update')->isAllowed(),
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        '#multilingual' => TRUE,
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      ];
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			@ -450,7 +451,6 @@ class ContentTranslationHandler implements ContentTranslationHandlerInterface, E
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      }
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      // A new translation is enabled by default.
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      $metadata = $this->manager->getTranslationMetadata($entity);
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      $status = $new_translation || $metadata->isPublished();
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      // If there is only one published translation we cannot unpublish it,
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      // since there would be nothing left to display.
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			@ -680,11 +680,6 @@ class ContentTranslationHandler implements ContentTranslationHandlerInterface, E
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    $metadata->setPublished(!empty($values['status']));
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    $metadata->setCreatedTime(!empty($values['created']) ? strtotime($values['created']) : REQUEST_TIME);
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    $source_langcode = $this->getSourceLangcode($form_state);
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    if ($source_langcode) {
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      $metadata->setSource($source_langcode);
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    }
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    $metadata->setOutdated(!empty($values['outdated']));
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    if (!empty($values['retranslate'])) {
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      $this->retranslate($entity, $form_langcode);
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			@ -71,8 +71,9 @@ class ContentTranslationController extends ControllerBase {
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   *   The language to be used as target.
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   */
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  public function prepareTranslation(ContentEntityInterface $entity, LanguageInterface $source, LanguageInterface $target) {
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    $source_langcode = $source->getId();
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    /* @var \Drupal\Core\Entity\ContentEntityInterface $source_translation */
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    $source_translation = $entity->getTranslation($source->getId());
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    $source_translation = $entity->getTranslation($source_langcode);
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    $target_translation = $entity->addTranslation($target->getId(), $source_translation->toArray());
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    // Make sure we do not inherit the affected status from the source values.
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			@ -88,6 +89,7 @@ class ContentTranslationController extends ControllerBase {
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    // creation time.
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    $metadata->setAuthor($user);
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    $metadata->setCreatedTime(REQUEST_TIME);
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    $metadata->setSource($source_langcode);
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  }
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  /**
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