getFieldDefinitions($entity->getEntityTypeId(), $entity->bundle());
foreach ($fields as $field_name => $field) {
if ($field->getType() == 'view_mode_selector' && $field_value = $entity->{$field_name}->value) {
$view_mode = $field_value;
break;
}
}
return $view_mode;
}
/**
* Implements hook_entity_view_mode_info_alter().
*/
function view_mode_selector_entity_view_mode_info_alter(&$view_modes) {
// Load all view mode selector fields.
$storage = \Drupal::entityManager()->getStorage('field_config');
$field_ids = \Drupal::entityQuery('field_config')
->condition('field_type', 'view_mode_selector')
->execute();
$fields = $storage->loadMultiple($field_ids);
// Create the extra fields which represent the field deltas.
/** @var \Drupal\field\Entity\FieldConfig $field */
foreach ($fields as $field) {
$entity_type = $field->getTargetEntityTypeId();
// Load the view mode selector view mode and add it to the list.
$storage = \Drupal::entityManager()->getStorage('entity_view_mode');
$id = $entity_type . '.view_mode_selector';
$view_mode = $storage->load($id);
if (!$view_mode) {
// Create the view mode if it does not exist.
$view_mode = $storage->create([
'label' => t('View mode selector'),
'id' => $id,
'status' => true, // must be true; see: drupal.org/node/2322503
'targetEntityType' => $entity_type
], 'entity_view_mode');
$view_mode->save();
};
$view_modes[$entity_type]['view_mode_selector'] = $view_mode->toArray();
}
}
/**
* Implements hook_form_FORM_ID_alter().
*/
function view_mode_selector_form_entity_view_display_edit_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
$form_object = $form_state->getFormObject();
/** @var $view_display \Drupal\Core\Entity\Entity\EntityViewDisplay **/
$view_display = $form_object->getEntity();
if ($view_display->getMode() == 'view_mode_selector') {
drupal_set_message(t('This is a placeholder view mode from the View Mode Selector module. It will be replaced with a selected view mode.', [
'@view-mode-selector' => Url::fromUri('https://www.drupal.org/project/view_mode_selector'),
]), 'status');
drupal_set_message(t('The field settings have been disabled by the View Mode Selector module.', [
'@view-mode-selector' => Url::fromUri('https://www.drupal.org/project/view_mode_selector'),
]), 'warning');
$form['fields']['#disabled'] = TRUE;
}
}