function Checkboxes::processCheckboxes

Processes a checkboxes form element.

File

core/lib/Drupal/Core/Render/Element/Checkboxes.php, line 55

Class

Checkboxes

Provides a form element for a set of checkboxes.

Namespace

Code

public static function processCheckboxes(&$element, FormStateInterface $form_state, &$complete_form) {
    $value = is_array($element['#value']) ? $element['#value'] : [];
    $element['#tree'] = TRUE;
    if (count($element['#options']) > 0) {
        if (!isset($element['#default_value']) || $element['#default_value'] == 0) {
            $element['#default_value'] = [];
        }
        $weight = 0;
        foreach ($element['#options'] as $key => $choice) {
            // Integer 0 is not a valid #return_value, so use '0' instead.
            // @see \Drupal\Core\Render\Element\Checkbox::valueCallback().
            // @todo For Drupal 8, cast all integer keys to strings for consistency
            //   with \Drupal\Core\Render\Element\Radios::processRadios().
            if ($key === 0) {
                $key = '0';
            }
            // Maintain order of options as defined in #options, in case the element
            // defines custom option sub-elements, but does not define all option
            // sub-elements.
            $weight += 0.001;
            $element += [
                $key => [],
            ];
            $element[$key] += [
                '#type' => 'checkbox',
                '#title' => $choice,
                '#return_value' => $key,
                '#default_value' => isset($value[$key]) ? $key : NULL,
                '#attributes' => $element['#attributes'],
                '#ajax' => isset($element['#ajax']) ? $element['#ajax'] : NULL,
                // Errors should only be shown on the parent checkboxes element.
'#error_no_message' => TRUE,
                '#weight' => $weight,
            ];
        }
    }
    return $element;
}