LinkEdit.php

1. 8.x drupal/core/modules/node/lib/Drupal/node/Plugin/views/field/LinkEdit.php
2. 8.x drupal/core/modules/user/lib/Drupal/user/Plugin/views/field/LinkEdit.php
3. 8.x drupal/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/field/LinkEdit.php
4. 8.x drupal/core/modules/comment/lib/Drupal/comment/Plugin/views/field/LinkEdit.php

<?php

/**
 * @file
 * Definition of Drupal\comment\Plugin\views\field\LinkEdit.
 */
namespace Drupal\comment\Plugin\views\field;

use Drupal\Component\Annotation\PluginID;

/**
 * Field handler to present a link node edit.
 *
 * @ingroup views_field_handlers
 *
 * @PluginID("comment_link_edit")
 */
class LinkEdit extends Link {
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['destination'] = array(
      'default' => FALSE,
      'bool' => TRUE,
    );
    return $options;
  }
  public function buildOptionsForm(&$form, &$form_state) {
    parent::buildOptionsForm($form, $form_state);
    $form['destination'] = array(
      '#type' => 'checkbox',
      '#title' => t('Use destination'),
      '#description' => t('Add destination to the link'),
      '#default_value' => $this->options['destination'],
      '#fieldset' => 'more',
    );
  }
  function render_link($data, $values) {
    parent::render_link($data, $values);

    // ensure user has access to edit this comment.
    $comment = $this
      ->getValue($values);
    if (!$comment
      ->access('update')) {
      return;
    }
    $text = !empty($this->options['text']) ? $this->options['text'] : t('edit');
    unset($this->options['alter']['fragment']);
    if (!empty($this->options['destination'])) {
      $this->options['alter']['query'] = drupal_get_destination();
    }
    $this->options['alter']['path'] = "comment/" . $comment
      ->id() . "/edit";
    return $text;
  }

}