Provide link to file option
Overrides File::buildOptionsForm
public function buildOptionsForm(&$form, &$form_state) {
$form['file_download_path'] = array(
'#title' => t('Display download path instead of file storage URI'),
'#description' => t('This will provide the full download URL rather than the internal filestream address.'),
'#type' => 'checkbox',
'#default_value' => !empty($this->options['file_download_path']),
);
parent::buildOptionsForm($form, $form_state);
}