NodeTypeListBuilder.php

<?php

/**
 * @file
 * Contains \Drupal\node\NodeTypeListBuilder.
 */

namespace Drupal\node;

use Drupal\Core\Config\Entity\ConfigEntityListBuilder;
use Drupal\Core\Url;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Component\Utility\Xss;

/**
 * Defines a class to build a listing of node type entities.
 *
 * @see \Drupal\node\Entity\NodeType
 */
class NodeTypeListBuilder extends ConfigEntityListBuilder {

  /**
   * {@inheritdoc}
   */
  public function buildHeader() {
    $header['title'] = t('Name');
    $header['description'] = array(
      'data' => t('Description'),
      'class' => array(RESPONSIVE_PRIORITY_MEDIUM),
    );
    return $header + parent::buildHeader();
  }

  /**
   * {@inheritdoc}
   */
  public function buildRow(EntityInterface $entity) {
    $row['title'] = array(
      'data' => $this->getLabel($entity),
      'class' => array('menu-label'),
    );
    $row['description'] = Xss::filterAdmin($entity->getDescription());
    return $row + parent::buildRow($entity);
  }

  /**
   * {@inheritdoc}
   */
  public function getDefaultOperations(EntityInterface $entity) {
    $operations = parent::getDefaultOperations($entity);
    // Place the edit operation after the operations added by field_ui.module
    // which have the weights 15, 20, 25.
    if (isset($operations['edit'])) {
      $operations['edit']['weight'] = 30;
    }
    return $operations;
  }

  /**
   * {@inheritdoc}
   */
  public function render() {
    $build = parent::render();
    $build['table']['#empty'] = $this->t('No content types available. <a href="@link">Add content type</a>.', [
        '@link' => Url::fromRoute('node.type_add')->toString()
      ]);
    return $build;
  }

}