Iframe module field plugins

IframeAllAttributesFormatter.php

<?php

namespace Drupal\iframe\Plugin\Field\FieldFormatter;

use Drupal\Core\Field\FieldItemListInterface;

/**
 * Class IframeAllAttributesFormatter.
 *
 * @FieldFormatter(
 *  id = "iframe_with_all_attributes",
 *  label = @Translation("Iframe (without title) and all attributes"),
 *  field_types = {"iframe"}
 * )
 */
class IframeAllAttributesFormatter extends IframeDefaultFormatter {

  /**
   * {@inheritdoc}
   */
  public function viewElements(FieldItemListInterface $items, $langcode) {
    $elements = [];
    // settings from type
    $settings = $this->getSettings();
    // field_settings on concrete field
    $field_settings = $this->getFieldSettings();

    $allow_attributes = [ 'url', 'width', 'height', 'title', 'allowfullscreen', 'sandbox', 'referrerpolicy' ];
    foreach ($items as $delta => $item) {
      if (empty($item->url)) {
        continue;
      }
      if (!isset($item->title)) {
        $item->title = '';
      }
      foreach($field_settings as $field_key => $field_val) {
        if (in_array($field_key, $allow_attributes)) {
          continue;
        }
        $item->{$field_key} = $field_val;
      }
      $elements[$delta] = self::iframeIframe('', $item->url, $item);

      // Add additional attributes.
      if (!empty($item->allowfullscreen)) {
        $elements[$delta]['#attributes']->setAttribute('allowfullscreen', (bool) $item->allowfullscreen);
      }
      if (!empty($item->sandbox)) {
        $elements[$delta]['#attributes']->setAttribute('sandbox', $item->sandbox);
      }
      if (!empty($item->referrerpolicy)) {
        $elements[$delta]['#attributes']->setAttribute('referrerpolicy', $item->referrerpolicy);
      }

      // Tokens can be dynamic, so it's not cacheable.
      if (isset($settings['tokensupport']) && $settings['tokensupport']) {
        $elements[$delta]['cache'] = ['max-age' => 0];
      }
    }
    return $elements;
  }

}

IframeUrlAllAttributesWidget.php

<?php

namespace Drupal\iframe\Plugin\Field\FieldWidget;

use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Form\FormStateInterface;

/**
 * Plugin implementation of the 'iframe_urlwidthheigth' widget.
 *
 * @FieldWidget(
 *  id = "iframe_url_with_all_attributest",
 *  label = @Translation("URL with all the attributes."),
 *  field_types = {"iframe"}
 * )
 */
class IframeUrlAllAttributesWidget extends IframeUrlwidthheightWidget {

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    $values = $items[$delta]->toArray();
    $element = parent::formElement($items, $delta, $element, $form, $form_state);

    $element['sandbox'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Sandbox'),
      '#default_value' => $values['sandbox'] ?? '',
      '#description' => 'Applies extra restrictions to the content in the frame. The value of the attribute can either be empty to apply all restrictions, or space-separated tokens to lift particular restrictions',
      '#maxlength' => 255,
      '#size' => 60,
      '#weight' => 5,
    ];
    $element['referrerpolicy'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Referer Policy'),
      '#default_value' => $values['referrerpolicy'] ?? '',
      '#description' => "Indicates which referrer to send when fetching the frame's resource",
      '#maxlength' => 255,
      '#size' => 60,
      '#weight' => 6,
    ];
    $element['allowfullscreen'] = [
      '#type' => 'select',
      '#title' => $this->t('Allow fullscreen'),
      '#options' => [
        '0' => $this->t('false'),
        '1' => $this->t('true'),
      ],
      '#weight' => 7,
      '#default_value' => $values['allowfullscreen'] ?? '0',
      '#description' => $this->t('Allow fullscreen for iframe. The iframe can activate fullscreen mode by calling the requestFullscreen() method.'),
    ];
    return $element;
  }

}