function file_field_widget_process

Render API callback: Processes a file_generic field element.

Expands the file_generic type to include the description and display fields.

This function is assigned as a #process callback in file_field_widget_form().

File

core/modules/file/file.field.inc, line 807

Field module functionality for the File module.

Code

function file_field_widget_process($element, &$form_state, $form) {
  $item = $element['#value'];
  $item['fid'] = $element['fid']['#value'];

  $field = field_widget_field($element, $form_state);
  $instance = field_widget_instance($element, $form_state);
  $settings = $instance['widget']['settings'];

  $element['#theme'] = 'file_widget';

  // Add the display field if enabled.
  if (!empty($field['settings']['display_field'])) {
    $element['display'] = array(
      '#type' => empty($item['fid']) ? 'hidden' : 'checkbox',
      '#title' => t('Include file in display'),
      '#value' => isset($item['display']) ? $item['display'] : $field['settings']['display_default'],
      '#attributes' => array('class' => array('file-display')),
    );
  }
  else {
    $element['display'] = array(
      '#type' => 'hidden',
      '#value' => '1',
    );
  }

  // Add the description field if enabled.
  if (!empty($instance['settings']['description_field']) && $item['fid']) {
    $element['description'] = array(
      '#type' => 'textfield',
      '#title' => t('File display title'),
      '#description' => t('This text will be used in links to the uploaded file.'),
      '#value' => isset($item['description']) ? $item['description'] : '',
      '#maxlength' => 500,
    );
  }

  // Adjust the Ajax settings so that on upload and remove of any individual
  // file, the entire group of file fields is updated together.
  if ($field['cardinality'] != 1) {
    $parents = array_slice($element['#array_parents'], 0, -1);
    $new_path = 'file/ajax/' . implode('/', $parents) . '/' . $form['form_build_id']['#value'];
    // Token here is not generated with backdrop_token() as it does not need to
    // be session-based.
    $token = backdrop_hmac_base64($new_path, backdrop_get_private_key() . backdrop_get_hash_salt());
    $new_path .= '/' . $token;
    $field_element = backdrop_array_get_nested_value($form, $parents);
    $new_wrapper = $field_element['#id'] . '-ajax-wrapper';
    foreach (element_children($element) as $key) {
      if (isset($element[$key]['#ajax']['path'])) {
        $element[$key]['#ajax']['path'] = $new_path;
        $element[$key]['#ajax']['wrapper'] = $new_wrapper;
      }
    }
    unset($element['#prefix'], $element['#suffix']);
  }

  // Add another submit handler to the upload and remove buttons, to implement
  // functionality needed by the field widget. This submit handler, along with
  // the rebuild logic in file_field_widget_form() requires the entire field,
  // not just the individual item, to be valid.
  foreach (array('upload_button', 'remove_button') as $key) {
    $element[$key]['#submit'][] = 'file_field_widget_submit';
    $element[$key]['#limit_validation_errors'] = array(array_slice($element['#parents'], 0, -1));
  }

  return $element;
}