FilterHtmlImageSecure.php

<?php

namespace Drupal\filter\Plugin\Filter;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\filter\Attribute\Filter;
use Drupal\filter\FilterProcessResult;
use Drupal\filter\Plugin\FilterBase;
use Drupal\filter\Plugin\FilterInterface;

/**
 * Provides a filter to restrict images to site.
 */
class FilterHtmlImageSecure extends FilterBase {
    
    /**
     * {@inheritdoc}
     */
    public function process($text, $langcode) {
        return new FilterProcessResult(_filter_html_image_secure_process($text));
    }
    
    /**
     * {@inheritdoc}
     */
    public function tips($long = FALSE) {
        return $this->t('Only images hosted on this site may be used in &lt;img&gt; tags.');
    }

}