public static function YamlFormCodeMirror::valueCallback in YAML Form 8

Determines how user input is mapped to an element's #value property.

Parameters

array $element: An associative array containing the properties of the element.

mixed $input: The incoming input to populate the form element. If this is FALSE, the element's default value should be returned.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.

Return value

mixed The value to assign to the element.

Overrides Textarea::valueCallback

File

src/Element/YamlFormCodeMirror.php, line 62

Class

YamlFormCodeMirror

Provides a form element for HTML, YAML, or Plain text using CodeMirror.

Namespace

Drupal\yamlform\Element

Code

public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
  if ($input === FALSE && $element['#mode'] == 'yaml' && isset($element['#default_value'])) {

    // Convert associative array in default value to YAML.
    if (is_array($element['#default_value'])) {
      $element['#default_value'] = YamlFormTidy::tidy(Yaml::encode($element['#default_value']));
    }

    // Convert empty YAML into an empty string.
    if ($element['#default_value'] == '{  }') {
      $element['#default_value'] = '';
    }
    return $element['#default_value'];
  }
  return NULL;
}