RevisionLink.php in Drupal 8

Namespace

Drupal\node\Plugin\views\field

File

core/modules/node/src/Plugin/views/field/RevisionLink.php

<?php

namespace Drupal\node\Plugin\views\field;

use Drupal\Core\Url;
use Drupal\views\Plugin\views\field\LinkBase;
use Drupal\views\ResultRow;

/**
 * Field handler to present a link to a node revision.
 *
 * @ingroup views_field_handlers
 *
 * @ViewsField("node_revision_link")
 */
class RevisionLink extends LinkBase {

  /**
   * {@inheritdoc}
   */
  protected function getUrlInfo(ResultRow $row) {

    /** @var \Drupal\node\NodeInterface $node */
    $node = $this
      ->getEntity($row);

    // Current revision uses the node view path.
    return !$node
      ->isDefaultRevision() ? Url::fromRoute('entity.node.revision', [
      'node' => $node
        ->id(),
      'node_revision' => $node
        ->getRevisionId(),
    ]) : $node
      ->toUrl();
  }

  /**
   * {@inheritdoc}
   */
  protected function renderLink(ResultRow $row) {

    /** @var \Drupal\node\NodeInterface $node */
    $node = $this
      ->getEntity($row);
    if (!$node
      ->getRevisionid()) {
      return '';
    }
    $text = parent::renderLink($row);
    $this->options['alter']['query'] = $this
      ->getDestinationArray();
    return $text;
  }

  /**
   * {@inheritdoc}
   */
  protected function getDefaultLabel() {
    return $this
      ->t('View');
  }

}

Classes

Name	Description
RevisionLink	Field handler to present a link to a node revision.