class Text

contact_field_extra_fields in drupal/core/modules/contact/contact.module

Implements hook_field_extra_fields().

FieldPluginBase::buildOptionsForm in drupal/core/modules/views/lib/Drupal/views/Plugin/views/field/FieldPluginBase.php

Default options form that provides the label widget that all fields should have.

form_test_clicked_button in drupal/core/modules/system/tests/modules/form_test/form_test.module

Form builder to test button click detection.

hook_field_info in drupal/core/modules/field/field.api.php

Define Field API field types.

system.data_types.schema.yml in drupal/core/modules/system/config/schema/system.data_types.schema.yml

drupal/core/modules/system/config/schema/system.data_types.schema.yml

... See full list

class Text extends TokenizeAreaPluginBase {

  /**
   * Overrides \Drupal\views\Plugin\views\area\TokenizeAreaPluginBase::defineOptions().
   */
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['content'] = array(
      'default' => '',
      'translatable' => TRUE,
      'format_key' => 'format',
    );
    $options['format'] = array(
      'default' => NULL,
    );
    return $options;
  }

  /**
   * Overrides \Drupal\views\Plugin\views\area\TokenizeAreaPluginBase::buildOptionsForm().
   */
  public function buildOptionsForm(&$form, &$form_state) {
    parent::buildOptionsForm($form, $form_state);
    $form['content'] = array(
      '#type' => 'text_format',
      '#default_value' => $this->options['content'],
      '#rows' => 6,
      '#format' => isset($this->options['format']) ? $this->options['format'] : filter_default_format(),
      '#wysiwyg' => FALSE,
    );
  }
  public function submitOptionsForm(&$form, &$form_state) {
    $form_state['values']['options']['format'] = $form_state['values']['options']['content']['format'];
    $form_state['values']['options']['content'] = $form_state['values']['options']['content']['value'];
    parent::submitOptionsForm($form, $form_state);
  }

  /**
   * Implements \Drupal\views\Plugin\views\area\AreaPluginBase::render().
   */
  function render($empty = FALSE) {
    $format = isset($this->options['format']) ? $this->options['format'] : filter_default_format();
    if (!$empty || !empty($this->options['empty'])) {
      return array(
        '#markup' => $this
          ->renderTextarea($this->options['content'], $format),
      );
    }
    return array();
  }

  /**
   * Render a text area, using the proper format.
   */
  public function renderTextarea($value, $format) {
    if ($value) {
      return check_markup($this
        ->tokenizeValue($value), $format, '', FALSE);
    }
  }

}