function views_exposed_form_ajax_enable

Checks whether the exposed form will use AJAX.

Passes required form information removed in views_form_views_exposed_form_alter().

Parameters

array $form: The form being processed.

array $form_state: The form state.

Return value

array The form being processed.

File

./views.module, line 2221

Code

function views_exposed_form_ajax_enable(array &$form, array &$form_state) {
  // In order for AJAX to work the form build info is needed. Here check if
  // #ajax has been added to any form elements, and if so, pass this info as
  // settings via JavaScript, which get attached to the submitted form on AJAX
  // form submissions. #ajax property can be set not only for the first level of
  // the form, so look for it in the whole form.
  $ajax_info = array();
  $ajax_elements = views_exposed_form_ajax_lookup_recursive($form);
  // Determine if form is being processed.
  $triggering_element_name = '';
  if (!empty($form_state['input']['_triggering_element_name'])) {
    $triggering_element_name = $form_state['input']['_triggering_element_name'];
  }
  // When there are multiple elements with #ajax set on exposed form, pass only
  // triggering element name to JavaScript, otherwise #ajax will work only for
  // the first element.
  if (!empty($triggering_element_name) && !empty($ajax_elements)) {
    // Check if element has #ajax property set.
    if (in_array($triggering_element_name, $ajax_elements)) {
      $ajax_elements = array(
        $triggering_element_name => $triggering_element_name,
      );
    }
    else {
      $ajax_elements = array();
    }
  }
  if (!empty($ajax_elements)) {
    $form_info = array(
      'form_id' => $form['#form_id'],
      'form_build_id' => $form['#build_id'],
    );
    // Anonymous users don't get a token.
    if (!empty($form['#token'])) {
      $form_info['form_token'] = drupal_get_token($form['#token']);
    }
    foreach ($ajax_elements as $element_name) {
      $ajax_info[$element_name] = $form_info;
    }
    drupal_add_js(array(
      'ViewsExposedFormInfo' => $ajax_info,
    ), 'setting');
    // Add the javascript behavior that will handle this data.
    $form['#attached']['js'][] = array(
      'weight' => 100,
      'data' => drupal_get_path('module', 'views') . '/js/exposed-form-ajax.js',
    );
  }
  return $form;
}