readonly_field_widget.module in Read-only Field Widget 8

Contains readonly_field_widget.module..

File

readonly_field_widget.module

<?php

/**
 * @file
 * Contains readonly_field_widget.module..
 */
use Drupal\Core\Entity\EntityFormInterface;
use Drupal\Core\Entity\FieldableEntityInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\readonly_field_widget\Plugin\Field\FieldWidget\ReadonlyFieldWidget;

/**
 * Implements hook_field_widget_info_alter().
 */
function readonly_field_widget_field_widget_info_alter(array &$info) {

  // Let the readonly field widget be useable on all field types.
  $formatters = \Drupal::service('plugin.manager.field.formatter')
    ->getDefinitions();
  $field_types = [];
  foreach ($formatters as $formatter) {
    $field_types = array_merge($field_types, $formatter['field_types']);
  }
  $info['readonly_field_widget']['field_types'] = array_unique($field_types);
}

/**
 * Implements hook_form_alter().
 */
function readonly_field_widget_form_alter(&$form, FormStateInterface $form_state, $form_id) {

  // Check that this is an entity form.
  $form_object = $form_state
    ->getFormObject();
  if ($form_object instanceof EntityFormInterface) {
    $entity = $form_object
      ->getEntity();

    // Set access to readonly widget items based on their view access.
    $storage = $form_state
      ->getStorage();
    if ($entity instanceof FieldableEntityInterface && isset($storage['form_display'])) {

      /** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $form_display */
      $form_display = $storage['form_display'];
    }
    else {
      return;
    }
    foreach ($form_display
      ->getComponents() as $name => $options) {
      $widget = $form_display
        ->getRenderer($name);
      if ($widget instanceof ReadonlyFieldWidget) {
        $items = $entity
          ->get($name);
        $items
          ->filterEmptyItems();
        $form[$name]['#access'] = $items
          ->access('view');
      }
    }
  }
}

/**
 * Implements hook_theme_suggestions_HOOK_alter().
 */
function readonly_field_widget_theme_suggestions_alter(array &$suggestions, array $variables, $hook) {
  if ($hook !== 'field') {
    return;
  }

  // 'field' template is already in the suggestions array, but core overrides it
  // for node titles, which collides with readonly_field_widget behavior. Make
  // 'field' the last template for titles when readonly is configured for it.
  $parents = [];
  if (isset($variables['element']['#parents'])) {
    $parents = $variables['element']['#parents'];
  }
  $field_name = $variables['element']['#field_name'];
  if (in_array('readonly_field', $parents) && $field_name == 'title') {
    $suggestions[] = 'field';
  }
}

Functions

Name	Description
readonly_field_widget_field_widget_info_alter	Implements hook_field_widget_info_alter().
readonly_field_widget_form_alter	Implements hook_form_alter().
readonly_field_widget_theme_suggestions_alter	Implements hook_theme_suggestions_HOOK_alter().