--- /dev/null
+<?php
+
+namespace Drupal\file\Plugin\Field\FieldFormatter;
+
+use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Field\FieldItemInterface;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Formatter to render the file URI to its download path.
+ *
+ * @FieldFormatter(
+ * id = "file_uri",
+ * label = @Translation("File URI"),
+ * field_types = {
+ * "uri"
+ * }
+ * )
+ */
+class FileUriFormatter extends BaseFieldFileFormatterBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function defaultSettings() {
+ $settings = parent::defaultSettings();
+
+ $settings['file_download_path'] = FALSE;
+ return $settings;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function settingsForm(array $form, FormStateInterface $form_state) {
+ $form = parent::settingsForm($form, $form_state);
+
+ $form['file_download_path'] = [
+ '#title' => $this->t('Display the file download URI'),
+ '#type' => 'checkbox',
+ '#default_value' => $this->getSetting('file_download_path'),
+ ];
+
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function viewValue(FieldItemInterface $item) {
+ $value = $item->value;
+ if ($this->getSetting('file_download_path')) {
+ // @todo Wrap in file_url_transform_relative(). This is currently
+ // impossible. See BaseFieldFileFormatterBase::viewElements(). Fix in
+ // https://www.drupal.org/node/2646744.
+ $value = file_create_url($value);
+ }
+ return $value;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function isApplicable(FieldDefinitionInterface $field_definition) {
+ return parent::isApplicable($field_definition) && $field_definition->getName() === 'uri';
+ }
+
+}