function content_add_more_js in Content Construction Kit (CCK) 6.2

Same name and namespace in other branches

1. 6.3 includes/content.node_form.inc \content_add_more_js()
2. 6 includes/content.node_form.inc \content_add_more_js()

Menu callback for AHAH addition of new empty widgets.

1 string reference to 'content_add_more_js'

content_menu in ./content.module

Implementation of hook_menu().

File

includes/content.node_form.inc, line 270

Create fields' form for a content type.

Code

function content_add_more_js($type_name_url, $field_name) {
  $type = content_types($type_name_url);
  $field = content_fields($field_name, $type['type']);
  if ($field['multiple'] != 1 || empty($_POST['form_build_id'])) {

    // Invalid request.
    drupal_json(array(
      'data' => '',
    ));
    exit;
  }

  // Retrieve the cached 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_json(array(
      'data' => '',
    ));
    exit;
  }

  // We don't simply return a new empty widget to append to existing ones, because
  // - ahah.js won't simply let us add a new row to a table
  // - attaching the 'draggable' behavior won't be easy
  // So we resort to rebuilding the whole table of widgets including the existing ones,
  // which makes us jump through a few hoops.
  // The form that we get from the cache is unbuilt. We need to build it so that
  // _value callbacks can be executed and $form_state['values'] populated.
  // We only want to affect $form_state['values'], not the $form itself
  // (built forms aren't supposed to enter the cache) nor the rest of $form_data,
  // so we use copies of $form and $form_data.
  $form_copy = $form;
  $form_state_copy = $form_state;
  $form_copy['#post'] = array();
  form_builder($_POST['form_id'], $form_copy, $form_state_copy);

  // Just grab the data we need.
  $form_state['values'] = $form_state_copy['values'];

  // Reset cached ids, so that they don't affect the actual form we output.
  form_clean_id(NULL, TRUE);

  // Sort the $form_state['values'] we just built *and* the incoming $_POST data
  // according to d-n-d reordering.
  unset($form_state['values'][$field_name][$field['field_name'] . '_add_more']);
  foreach ($_POST[$field_name] as $delta => $item) {
    $form_state['values'][$field_name][$delta]['_weight'] = $item['_weight'];
  }
  $form_state['values'][$field_name] = _content_sort_items($field, $form_state['values'][$field_name]);
  $_POST[$field_name] = _content_sort_items($field, $_POST[$field_name]);

  // Build our new form element for the whole field, asking for one more element.
  $form_state['item_count'] = array(
    $field_name => count($_POST[$field_name]) + 1,
  );
  $form_element = content_field_form($form, $form_state, $field);

  // Let other modules alter it.
  // We pass an empty array as hook_form_alter's usual 'form_state' parameter,
  // instead of $form_state (for reasons we may never remember).
  // However, this argument is still expected to be passed by-reference
  // (and PHP5.3 will throw an error if it isn't.) This leads to:
  $data =& $form_element;
  $empty_form_state = array();
  $data['__drupal_alter_by_ref'] = array(
    &$empty_form_state,
  );
  drupal_alter('form', $data, 'content_add_more_js');

  // Add the new element at the right place in the (original, unbuilt) form.
  if (module_exists('fieldgroup') && ($group_name = _fieldgroup_field_get_group($type['type'], $field_name))) {
    $form[$group_name][$field_name] = $form_element[$field_name];
  }
  else {
    $form[$field_name] = $form_element[$field_name];
  }

  // Save the new definition of the form.
  $form_state['values'] = array();
  form_set_cache($form_build_id, $form, $form_state);

  // Build the new form against the incoming $_POST values so that we can
  // render the new element.
  $delta = max(array_keys($_POST[$field_name])) + 1;
  $_POST[$field_name][$delta]['_weight'] = $delta;
  $form_state = array(
    'submitted' => FALSE,
  );
  $form += array(
    '#post' => $_POST,
    '#programmed' => FALSE,
  );
  $form = form_builder($_POST['form_id'], $form, $form_state);

  // Render the new output.
  $field_form = !empty($group_name) ? $form[$group_name][$field_name] : $form[$field_name];

  // We add a div around the new content to receive the ahah effect.
  $field_form[$delta]['#prefix'] = '<div class="ahah-new-content">' . (isset($field_form[$delta]['#prefix']) ? $field_form[$delta]['#prefix'] : '');
  $field_form[$delta]['#suffix'] = (isset($field_form[$delta]['#suffix']) ? $field_form[$delta]['#suffix'] : '') . '</div>';

  // Prevent duplicate wrapper.
  unset($field_form['#prefix'], $field_form['#suffix']);

  // If a newly inserted widget contains AHAH behaviors, they normally won't
  // work because AHAH doesn't know about those - it just attaches to the exact
  // form elements that were initially specified in the Drupal.settings object.
  // The new ones didn't exist then, so we need to update Drupal.settings
  // by ourselves in order to let AHAH know about those new form elements.
  $javascript = drupal_add_js(NULL, NULL);
  $output_js = isset($javascript['setting']) ? '<script type="text/javascript">jQuery.extend(Drupal.settings, ' . drupal_to_js(call_user_func_array('array_merge_recursive', $javascript['setting'])) . ');</script>' : '';
  $output = theme('status_messages') . drupal_render($field_form) . $output_js;

  // Using drupal_json() breaks filefield's file upload, because the jQuery
  // Form plugin handles file uploads in a way that is not compatible with
  // 'text/javascript' response type.
  $GLOBALS['devel_shutdown'] = FALSE;
  print drupal_to_js(array(
    'status' => TRUE,
    'data' => $output,
  ));
  exit;
}