Form submission handler for upload/remove button of file_field_widget_form().

This runs in addition to and after file_managed_file_submit().

See also

file_managed_file_submit()

file_field_widget_form()

file_field_widget_process()

File

drupal-7.x/modules/file/file.field.inc, line 754

Field module functionality for the File module.

Code

function file_field_widget_submit($form, &$form_state) {
  // During the form rebuild, file_field_widget_form() will create field item
  // widget elements using re-indexed deltas, so clear out $form_state['input']
  // to avoid a mismatch between old and new deltas. The rebuilt elements will
  // have #default_value set appropriately for the current state of the field,
  // so nothing is lost in doing this.
  $parents = array_slice($form_state['triggering_element']['#parents'], 0, -2);
  drupal_array_set_nested_value($form_state['input'], $parents, NULL);

  $button = $form_state['triggering_element'];

  // Go one level up in the form, to the widgets container.
  $element = drupal_array_get_nested_value($form, array_slice($button['#array_parents'], 0, -1));
  $field_name = $element['#field_name'];
  $langcode = $element['#language'];
  $parents = $element['#field_parents'];

  $submitted_values = drupal_array_get_nested_value($form_state['values'], array_slice($button['#array_parents'], 0, -2));
  foreach ($submitted_values as $delta => $submitted_value) {
    if (!$submitted_value['fid']) {
      unset($submitted_values[$delta]);
    }
  }

  // Re-index deltas after removing empty items.
  $submitted_values = array_values($submitted_values);

  // Update form_state values.
  drupal_array_set_nested_value($form_state['values'], array_slice($button['#array_parents'], 0, -2), $submitted_values);

  // Update items.
  $field_state = field_form_get_state($parents, $field_name, $langcode, $form_state);
  $field_state['items'] = $submitted_values;
  field_form_set_state($parents, $field_name, $langcode, $form_state, $field_state);
}