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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\Render\Element\File. | |
| */ | |
| namespace Drupal\Core\Render\Element; | |
| use Drupal\Core\Form\FormStateInterface; | |
| use Drupal\Core\Render\Element; | |
| /** | |
| * Provides a form element for uploading a file. | |
| * | |
| * If you add this element to a form the enctype="multipart/form-data" attribute | |
| * will automatically be added to the form element. | |
| * | |
| * Properties: | |
| * - #multiple: A Boolean indicating whether multiple files may be uploaded. | |
| * - #size: The size of the file input element in characters. | |
| * | |
| * @FormElement("file") | |
| */ | |
| class File extends FormElement { | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getInfo() { | |
| $class = get_class($this); | |
| return array( | |
| '#input' => TRUE, | |
| '#multiple' => FALSE, | |
| '#process' => array( | |
| array($class, 'processFile'), | |
| ), | |
| '#size' => 60, | |
| '#pre_render' => array( | |
| array($class, 'preRenderFile'), | |
| ), | |
| '#theme' => 'input__file', | |
| '#theme_wrappers' => array('form_element'), | |
| ); | |
| } | |
| /** | |
| * Processes a file upload element, make use of #multiple if present. | |
| */ | |
| public static function processFile(&$element, FormStateInterface $form_state, &$complete_form) { | |
| if ($element['#multiple']) { | |
| $element['#attributes'] = array('multiple' => 'multiple'); | |
| $element['#name'] .= '[]'; | |
| } | |
| return $element; | |
| } | |
| /** | |
| * Prepares a #type 'file' render element for input.html.twig. | |
| * | |
| * For assistance with handling the uploaded file correctly, see the API | |
| * provided by file.inc. | |
| * | |
| * @param array $element | |
| * An associative array containing the properties of the element. | |
| * Properties used: #title, #name, #size, #description, #required, | |
| * #attributes. | |
| * | |
| * @return array | |
| * The $element with prepared variables ready for input.html.twig. | |
| */ | |
| public static function preRenderFile($element) { | |
| $element['#attributes']['type'] = 'file'; | |
| Element::setAttributes($element, array('id', 'name', 'size')); | |
| static::setAttributes($element, array('js-form-file', 'form-file')); | |
| return $element; | |
| } | |
| } |