function filefield_js in FileField 6.3

Same name and namespace in other branches

1. 5.2 filefield.module \filefield_js()
2. 6.2 filefield.widget.inc \filefield_js()

Menu callback; Shared AHAH callback for uploads and deletions.

This rebuilds the form element for a particular field item. As long as the form processing is properly encapsulated in the widget element the form should rebuild correctly using FAPI without the need for additional callbacks or processing.

1 string reference to 'filefield_js'

filefield_menu in ./filefield.module

Implementation of hook_menu().

File

./filefield.module, line 586

FileField: Defines a CCK file field type.

Code

function filefield_js($type_name, $field_name, $delta) {
  $field = content_fields($field_name, $type_name);

  // Immediately disable devel shutdown functions so that it doesn't botch our
  // JSON output.
  $GLOBALS['devel_shutdown'] = FALSE;
  if (empty($field) || empty($_POST['form_build_id'])) {

    // Invalid request.
    drupal_set_message(t('An unrecoverable error occurred. The uploaded file likely exceeded the maximum file size (@size) that this server supports.', array(
      '@size' => format_size(file_upload_max_size()),
    )), 'error');
    print drupal_to_js(array(
      'data' => theme('status_messages'),
    ));
    exit;
  }

  // Build the new form.
  $form_state = array(
    'submitted' => FALSE,
  );
  $form_build_id = $_POST['form_build_id'];
  $form = form_get_cache($form_build_id, $form_state);
  if (!$form) {

    // Invalid form_build_id.
    drupal_set_message(t('An unrecoverable error occurred. This form was missing from the server cache. Try reloading the page and submitting again.'), 'error');
    print drupal_to_js(array(
      'data' => theme('status_messages'),
    ));
    exit;
  }

  // Build the form. This calls the file field's #value_callback function and
  // saves the uploaded file. Since this form is already marked as cached
  // (the #cache property is TRUE), the cache is updated automatically and we
  // don't need to call form_set_cache().
  $args = $form['#parameters'];
  $form_id = array_shift($args);
  $form['#post'] = $_POST;
  $form = form_builder($form_id, $form, $form_state);

  // Update the cached form with the new element at the right place in the form.
  if (module_exists('fieldgroup') && ($group_name = _fieldgroup_field_get_group($type_name, $field_name))) {
    if (isset($form['#multigroups']) && isset($form['#multigroups'][$group_name][$field_name])) {
      $form_element = $form[$group_name][$delta][$field_name];
    }
    else {
      $form_element = $form[$group_name][$field_name][$delta];
    }
  }
  if (!isset($form_element)) {
    $form_element = $form[$field_name][$delta];
  }

  // Prevent duplicate wrappers
  unset($form_element['#prefix'], $form_element['#suffix']);
  if (isset($form_element['_weight'])) {
    unset($form_element['_weight']);
  }
  $output = drupal_render($form_element);

  // AHAH is not being nice to us and doesn't know the "other" button (that is,
  // either "Upload" or "Delete") yet. Which in turn causes it not to attach
  // AHAH behaviours after replacing the element. So we need to tell it first.
  // Loop through the JS settings and find the settings needed for our buttons.
  $javascript = drupal_add_js(NULL, NULL);
  $filefield_ahah_settings = array();
  if (isset($javascript['setting'])) {
    foreach ($javascript['setting'] as $settings) {
      if (isset($settings['ahah'])) {
        foreach ($settings['ahah'] as $id => $ahah_settings) {
          if (strpos($id, 'filefield-upload') || strpos($id, 'filefield-remove')) {
            $filefield_ahah_settings[$id] = $ahah_settings;
          }
        }
      }
    }
  }

  // Add the AHAH settings needed for our new buttons.
  if (!empty($filefield_ahah_settings)) {
    $output .= '<script type="text/javascript">jQuery.extend(Drupal.settings.ahah, ' . drupal_to_js($filefield_ahah_settings) . ');</script>';
  }
  $output = theme('status_messages') . $output;

  // For some reason, file uploads don't like drupal_json() with its manual
  // setting of the text/javascript HTTP header. So use this one instead.
  print drupal_to_js(array(
    'status' => TRUE,
    'data' => $output,
  ));
  exit;
}