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<?php
namespace Drupal\file\Plugin\views\field;
use Drupal\Core\Form\FormStateInterface;
use Drupal\views\ResultRow;
use Drupal\views\ViewExecutable;
use Drupal\views\Plugin\views\display\DisplayPluginBase;
use Drupal\views\Plugin\views\field\FieldPluginBase;
/**
* Field handler to provide simple renderer that allows linking to a file.
*
* @ingroup views_field_handlers
*
* @ViewsField("file")
*/
class File extends FieldPluginBase {
/**
* {@inheritdoc}
*/
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';
}
}
/**
* {@inheritdoc}
*/
protected function defineOptions() {
$options = parent::defineOptions();
$options['link_to_file'] = ['default' => FALSE];
return $options;
}
/**
* Provide link to file option
*/
public function buildOptionsForm(&$form, FormStateInterface $form_state) {
$form['link_to_file'] = [
'#title' => $this->t('Link this field to download the file'),
'#description' => $this->t("Enable to override this field's links."),
'#type' => 'checkbox',
'#default_value' => !empty($this->options['link_to_file']),
];
parent::buildOptionsForm($form, $form_state);
}
/**
* Prepares link to the file.
*
* @param string $data
* The XSS safe string for the link text.
* @param \Drupal\views\ResultRow $values
* The values retrieved from a single row of a view's query result.
*
* @return string
* Returns a string for the link text.
*/
protected function renderLink($data, ResultRow $values) {
if (!empty($this->options['link_to_file']) && $data !== NULL && $data !== '') {
$this->options['alter']['make_link'] = TRUE;
// @todo Wrap in file_url_transform_relative(). This is currently
// impossible. As a work-around, we could add the 'url.site' cache context
// to ensure different file URLs are generated for different sites in a
// multisite setup, including HTTP and HTTPS versions of the same site.
// But unfortunately it's impossible to bubble a cache context here.
// Fix in https://www.drupal.org/node/2646744.
$this->options['alter']['path'] = file_create_url($this->getValue($values, 'uri'));
}
return $data;
}
/**
* {@inheritdoc}
*/
public function render(ResultRow $values) {
$value = $this->getValue($values);
return $this->renderLink($this->sanitizeValue($value), $values);
}
}