function editor_button_link_form_editor_link_dialog_alter in Editor Button Link 8

Implements hook_form_FORM_ID_alter().

Note: the editor_file module declares that its EditorFileDialog form uses 'editor_link_dialog' as base_form_id. In this case, the function above is going to be called as an implementation of hook_form_BASE_FORM_ID_alter().

File

./editor_button_link.module, line 18

Button link styles.

Code

function editor_button_link_form_editor_link_dialog_alter(&$form, FormStateInterface $form_state, $form_id) {
  $argument = $form_state
    ->getBuildInfo()['args'][0];

  // In case the only argument we get is the Editor instead of the FilterFormat.
  if ($argument instanceof Editor) {
    $argument = $argument
      ->getFilterFormat();
  }
  $restrictions = $argument
    ->getHtmlRestrictions();
  if (isset($form_state
    ->getUserInput()['editor_object'])) {
    $input = $form_state
      ->getUserInput()['editor_object'];
    $form_state
      ->set('link_element', $input);
    $form_state
      ->setCached(TRUE);
  }
  else {

    // Retrieve the link element's attributes from form state.
    $input = $form_state
      ->get('link_element') ?: [];
  }

  /*
   * Helper to retrieve form fields' default values.
   *
   * @param string $attribute_name
   * @param string $fallback
   *
   * @return mixed
   *   The existing value or the fallback.
   */
  $get_default_value = function ($attribute_name, $fallback = '') use ($input) {
    return !empty($input[$attribute_name]) ? $input[$attribute_name] : $fallback;
  };

  /*
   * Helper to set the status of a form field according to the status of the
   * filter about the attribute it is defining.
   *
   * @param string $attribute_name
   *
   * @return bool
   *   TRUE if the filter is disabled or if the entire "a" tag is allowed or if
   *   the given attribute is allowed for the "a" tag.
   */
  $is_accessible = function ($attribute_name) use ($restrictions) {
    return $restrictions === FALSE || $restrictions['allowed']['a'] === TRUE || !empty($restrictions['allowed']['a'][$attribute_name]);
  };

  /** @var Drupal\filter\Entity\FilterFormat $filter_format */
  $filter_format = $form_state
    ->getBuildInfo()['args'][0];
  $plugin_format_filters = $filter_format
    ->id();
  $filter_config = \Drupal::config('filter.format.' . $plugin_format_filters);
  $filter_settings = $filter_config
    ->get('filters.editor_button_link_filter.settings');
  if (generate_option_settings($filter_settings['button_link_options'])) {
    $form['attributes']['data-drupal-button-link'] = [
      '#type' => 'select',
      '#title' => t('Button'),
      '#description' => t('Transform link style to a button'),
      '#options' => generate_option_settings($filter_settings['button_link_options']),
      '#default_value' => $get_default_value('data-drupal-button-link'),
      '#access' => $is_accessible('class'),
      '#weight' => 3,
    ];
  }
  if (generate_option_settings($filter_settings['button_link_size_options'])) {
    $form['attributes']['data-drupal-button-link-size'] = [
      '#type' => 'select',
      '#title' => t('Button size'),
      '#description' => t('Transform link style to a button'),
      '#options' => generate_option_settings($filter_settings['button_link_size_options']),
      '#default_value' => $get_default_value('data-drupal-button-link-size'),
      '#access' => $is_accessible('class'),
      '#group' => 'buttonlink',
      '#states' => [
        'invisible' => [
          'select[name="attributes[data-drupal-button-link]"]' => [
            'value' => '',
          ],
        ],
      ],
      '#weight' => 21,
    ];
  }
  if (generate_option_settings($filter_settings['button_link_style_options'])) {
    $form['attributes']['data-drupal-button-link-style'] = [
      '#type' => 'select',
      '#title' => t('Button style'),
      '#description' => t('Transform link style to a button'),
      '#options' => generate_option_settings($filter_settings['button_link_style_options']),
      '#default_value' => $get_default_value('data-drupal-button-link-style'),
      '#access' => $is_accessible('class'),
      '#group' => 'buttonlink',
      '#states' => [
        'invisible' => [
          'select[name="attributes[data-drupal-button-link]"]' => [
            'value' => '',
          ],
        ],
      ],
      '#weight' => 21,
    ];
  }

  // Add #validate callback that handles empty attributes.
  array_unshift($form['#validate'], '_editor_button_link_attributes_validate');
}