public function FormElement::preprocessElement in Express 8

Preprocess the variables array if an element is present.

Parameters

\Drupal\bootstrap\Utility\Element $element: The Element object.

\Drupal\bootstrap\Utility\Variables $variables: The Variables object.

Overrides PreprocessBase::preprocessElement

File

themes/contrib/bootstrap/src/Plugin/Preprocess/FormElement.php, line 25

Contains \Drupal\bootstrap\Plugin\Preprocess\FormElement.

Class

FormElement

Pre-processes variables for the "form_element" theme hook.

Namespace

Drupal\bootstrap\Plugin\Preprocess

Code

public function preprocessElement(Element $element, Variables $variables) {

  // Set has_error flag.
  $variables['has_error'] = $element
    ->getProperty('has_error');
  if ($element
    ->getProperty('autocomplete_route_name')) {
    $variables['is_autocomplete'] = TRUE;
  }

  // See http://getbootstrap.com/css/#forms-controls.
  $checkbox = $variables['is_checkbox'] = $element
    ->isType('checkbox');
  $radio = $variables['is_radio'] = $element
    ->isType('radio');

  // Determine if the form element should have the "form-group" class added.
  // Use an explicitly set property from the element or use its other
  // properties as the criteria to determine if it should be set.
  $variables['is_form_group'] = $element
    ->getProperty('form_group', !$variables['is_checkbox'] && !$variables['is_radio'] && !$element
    ->isType([
    'hidden',
    'textarea',
  ]));

  // Add label_display and label variables to template.
  $display = $variables['label_display'] = $variables['title_display'] = $element
    ->getProperty('title_display');

  // Place single checkboxes and radios in the label field.
  if ($checkbox || $radio) {
    $label = Element::create($variables['label']);
    $children =& $label
      ->getProperty('children', '');
    $children .= $variables['children'];
    if ($label
      ->getProperty('title_display') != 'none') {
      unset($variables['children']);
    }

    // Inform label if it is in checkbox/radio context.
    $label
      ->setProperty('is_checkbox', $checkbox);
    $label
      ->setProperty('is_radio', $radio);

    // Pass the label attributes to the label, if available.
    if ($element
      ->hasProperty('label_attributes')) {
      $label
        ->setAttributes($element
        ->getProperty('label_attributes'));
    }
  }

  // Remove the #field_prefix and #field_suffix values set in
  // template_preprocess_form_element(). These are handled at the input level.
  // @see \Drupal\bootstrap\Plugin\Preprocess\Input::preprocess().
  unset($variables['prefix']);
  unset($variables['suffix']);
}