FilterAutoP.php

<?php

namespace Drupal\filter\Plugin\Filter;

use Drupal\filter\FilterProcessResult;
use Drupal\filter\Plugin\FilterBase;

/**
 * Provides a filter to convert line breaks to HTML.
 *
 * @Filter(
 *   id = "filter_autop",
 *   title = @Translation("Convert line breaks into HTML (i.e. <code>&lt;br&gt;</code> and <code>&lt;p&gt;</code>)"),
 *   type = Drupal\filter\Plugin\FilterInterface::TYPE_MARKUP_LANGUAGE
 * )
 */
class FilterAutoP extends FilterBase {
    
    /**
     * {@inheritdoc}
     */
    public function process($text, $langcode) {
        return new FilterProcessResult(_filter_autop($text));
    }
    
    /**
     * {@inheritdoc}
     */
    public function tips($long = FALSE) {
        if ($long) {
            return $this->t('Lines and paragraphs are automatically recognized. The &lt;br /&gt; line break, &lt;p&gt; paragraph and &lt;/p&gt; close paragraph tags are inserted automatically. If paragraphs are not recognized simply add a couple of blank lines.');
        }
        else {
            return $this->t('Lines and paragraphs break automatically.');
        }
    }

}