File.php

1. 8.x drupal/core/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/File/File.php
2. 8.x drupal/core/vendor/symfony/validator/Symfony/Component/Validator/Constraints/File.php
3. 8.x drupal/core/vendor/phpunit/php-code-coverage/PHP/CodeCoverage/Report/Node/File.php
4. 8.x drupal/core/modules/file/lib/Drupal/file/Plugin/views/field/File.php
5. 8.x drupal/core/modules/file/lib/Drupal/file/Plugin/views/wizard/File.php
6. 8.x drupal/core/modules/file/lib/Drupal/file/Plugin/Core/Entity/File.php
7. 8.x drupal/core/vendor/phpunit/php-code-coverage/PHP/CodeCoverage/Report/HTML/Renderer/File.php

<?php

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

use Drupal\views\ViewExecutable;
use Drupal\views\Plugin\views\display\DisplayPluginBase;
use Drupal\Component\Annotation\PluginID;
use Drupal\views\Plugin\views\field\FieldPluginBase;

/**
 * Field handler to provide simple renderer that allows linking to a file.
 *
 * @ingroup views_field_handlers
 *
 * @PluginID("file")
 */
class File extends FieldPluginBase {

  /**
   * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::init().
   */
  public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
    parent::init($view, $display, $options);
    if (!empty($options['link_to_file'])) {
      $this->additional_fields['uri'] = 'uri';
    }
  }
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['link_to_file'] = array(
      'default' => FALSE,
      'bool' => TRUE,
    );
    return $options;
  }

  /**
   * Provide link to file option
   */
  public function buildOptionsForm(&$form, &$form_state) {
    $form['link_to_file'] = array(
      '#title' => t('Link this field to download the file'),
      '#description' => t("Enable to override this field's links."),
      '#type' => 'checkbox',
      '#default_value' => !empty($this->options['link_to_file']),
    );
    parent::buildOptionsForm($form, $form_state);
  }

  /**
   * Render whatever the data is as a link to the file.
   *
   * Data should be made XSS safe prior to calling this function.
   */
  function render_link($data, $values) {
    if (!empty($this->options['link_to_file']) && $data !== NULL && $data !== '') {
      $this->options['alter']['make_link'] = TRUE;
      $this->options['alter']['path'] = file_create_url($this
        ->getValue($values, 'uri'));
    }
    return $data;
  }
  function render($values) {
    $value = $this
      ->getValue($values);
    return $this
      ->render_link($this
      ->sanitizeValue($value), $values);
  }

}