public static function YamlFormElementAttributes::processYamlFormElementAttributes in YAML Form 8

Processes element attributes.

File

src/Element/YamlFormElementAttributes.php, line 48

Class

YamlFormElementAttributes

Provides a form element for element attributes.

Namespace

Drupal\yamlform\Element

Code

public static function processYamlFormElementAttributes(&$element, FormStateInterface $form_state, &$complete_form) {
  $element['#tree'] = TRUE;

  // Determine what type of HTML element the attributes are being applied to.
  $type = t('element');
  $types = [
    preg_quote(t('form')),
    preg_quote(t('link')),
    preg_quote(t('button')),
  ];
  if (preg_match('/\\b(' . implode('|', $types) . ')\\b/i', $element['#title'], $match)) {
    $type = $match[1];
  }
  $t_args = [
    '@title' => $element['#title'],
    '@type' => Unicode::strtolower($type),
  ];

  // Class.
  $element['#classes'] = trim($element['#classes']);
  if ($element['#classes']) {
    $classes = preg_split('/\\r?\\n/', $element['#classes']);
    $element['class'] = [
      '#type' => 'yamlform_select_other',
      '#title' => t('@title CSS classes', $t_args),
      '#description' => t("Apply classes to the @type. Select 'custom...' to enter custom classes.", $t_args),
      '#multiple' => TRUE,
      '#options' => [
        YamlFormSelectOther::OTHER_OPTION => t('custom...'),
      ] + array_combine($classes, $classes),
      '#other__option_delimiter' => ' ',
      '#attributes' => [
        'class' => [
          'js-yamlform-select2',
          'yamlform-select2',
          'js-' . $element['#id'] . '-attributes-style',
        ],
      ],
      '#attached' => [
        'library' => [
          'yamlform/yamlform.element.select2',
        ],
      ],
      '#default_value' => $element['#default_value']['class'],
    ];

    // ISSUE:
    // Nested element with #element_validate callback that alter an
    // element's value can break the returned value.
    //
    // WORKAROUND:
    // Manually process the 'yamlform_select_other' element.
    $element['class'] = YamlFormSelectOther::valueCallback($element['class'], FALSE, $form_state);
    $element['class'] = YamlFormSelectOther::processYamlFormOther($element['class'], $form_state, $complete_form);
    $element['class']['#type'] = 'item';
    unset($element['class']['#element_validate']);
  }
  else {
    $element['class'] = [
      '#type' => 'textfield',
      '#title' => t('@title CSS classes', $t_args),
      '#description' => t("Apply classes to the @type.", $t_args),
      '#default_value' => implode(' ', $element['#default_value']['class']),
    ];
  }

  // Custom options.
  $element['custom'] = [
    '#type' => 'texfield',
    '#placeholder' => t('Enter custom classes...'),
    '#states' => [
      'visible' => [
        'select.js-' . $element['#id'] . '-attributes-style' => [
          'value' => '_custom_',
        ],
      ],
    ],
    '#error_no_message' => TRUE,
    '#default_value' => '',
  ];

  // Style.
  $element['style'] = [
    '#type' => 'textfield',
    '#title' => t('@title CSS style', $t_args),
    '#description' => t('Apply custom styles to the @type.', $t_args),
    '#default_value' => $element['#default_value']['style'],
  ];

  // Attributes.
  $attributes = $element['#default_value'];
  unset($attributes['class'], $attributes['style']);
  $element['attributes'] = [
    '#type' => 'yamlform_codemirror',
    '#mode' => 'yaml',
    '#title' => t('@title custom attributes (YAML)', $t_args),
    '#description' => t('Enter additional attributes to be added the @type.', $t_args),
    '#attributes__access' => !\Drupal::moduleHandler()
      ->moduleExists('yamlform_ui') || \Drupal::currentUser()
      ->hasPermission('edit yamlform source'),
    '#default_value' => YamlFormTidy::tidy(Yaml::encode($attributes)),
  ];

  // Apply custom properties. Typically used for descriptions.
  foreach ($element as $key => $value) {
    if (strpos($key, '__') !== FALSE) {
      list($element_key, $property_key) = explode('__', ltrim($key, '#'));
      $element[$element_key]["#{$property_key}"] = $value;
    }
  }
  $element['#element_validate'] = [
    [
      get_called_class(),
      'validateYamlFormElementAttributes',
    ],
  ];
  return $element;
}