/**
  * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::defineOptions().
  */
 protected function defineOptions()
 {
     $options = parent::defineOptions();
     $options['label'] = array('default' => $this->definition['title'], 'translatable' => TRUE);
     $options['gcal'] = array('default' => '');
     $options['class'] = array('default' => 'fc-event-default fc-event-gcal');
     $options['timezone'] = array('default' => date_default_timezone_get());
     return $options;
 }

 /**
  * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::defineOptions().
  */
 public function buildOptionsForm(&$form, FormStateInterface $form_state)
 {
     parent::buildOptionsForm($form, $form_state);
     $modules = system_get_info('module');
     $names = array();
     foreach ($modules as $name => $module) {
         $names[$name] = $module['name'];
     }
     $form['data_module'] = array('#title' => $this->t('Module name'), '#type' => 'select', '#description' => $this->t('The module which sets this user data.'), '#default_value' => $this->options['data_module'], '#options' => $names);
     $form['data_name'] = array('#title' => $this->t('Name'), '#type' => 'textfield', '#description' => $this->t('The name of the data key.'), '#default_value' => $this->options['data_name']);
 }

  /**
   * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::init().
   */
  public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
    parent::init($view, $display, $options);

    $this->additional_fields['profile_id'] = 'profile_id';
  }

 /**
  * Tests the trimText method.
  */
 public function testTrimText()
 {
     // Test unicode. See https://www.drupal.org/node/513396#comment-2839416.
     $text = array('Tuy nhiên, những hi vọng', 'Giả sử chúng tôi có 3 Apple', 'siêu nhỏ này là bộ xử lý', 'Di động của nhà sản xuất Phần Lan', 'khoảng cách từ đại lí đến', 'của hãng bao gồm ba dòng', 'сд асд асд ас', 'асд асд асд ас');
     // Just test maxlength without word boundary.
     $alter = array('max_length' => 10);
     $expect = array('Tuy nhiên,', 'Giả sử chú', 'siêu nhỏ n', 'Di động củ', 'khoảng các', 'của hãng b', 'сд асд асд', 'асд асд ас');
     foreach ($text as $key => $line) {
         $result_text = FieldPluginBase::trimText($alter, $line);
         $this->assertEqual($result_text, $expect[$key]);
     }
     // Test also word_boundary
     $alter['word_boundary'] = TRUE;
     $expect = array('Tuy nhiên', 'Giả sử', 'siêu nhỏ', 'Di động', 'khoảng', 'của hãng', 'сд асд', 'асд асд');
     foreach ($text as $key => $line) {
         $result_text = FieldPluginBase::trimText($alter, $line);
         $this->assertEqual($result_text, $expect[$key]);
     }
 }

 /**
  * {@inheritdoc}
  */
 protected function defineOptions()
 {
     $options = parent::defineOptions();
     $options['fields'] = array('default' => array());
     $options['destination'] = array('default' => 1);
     return $options;
 }

  /**
   * Provide the options form.
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    // Link options.
    $form['link_photo'] = array(
      '#title' => t("Link image"),
      '#description' => t("Link the image to the album page or image page."),
      '#type' => 'radios',
      '#options' => array(
        '' => $this->t('None'),
        'album' => $this->t('Album page'),
        'image' => $this->t('Image page')
      ),
      '#default_value' => $this->options['link_photo']
    );

    // Get image styles.
    $style_options = image_style_options();
    $form['image_style'] = array(
      '#title' => $this->t('Image style'),
      '#type' => 'select',
      '#default_value' => $this->options['image_style'],
      '#options' => $style_options,
    );

    parent::buildOptionsForm($form, $form_state);
  }

 /**
  * Constructs a 'Disqus Comment Count' view field plugin.
  *
  * @param array $configuration
  *   A configuration array containing information about the plugin instance.
  * @param string $plugin_id
  *   The plugin_id for the plugin instance.
  * @param mixed $plugin_definition
  *   The plugin implementation definition.
  * @param \Drupal\Core\Session\AccountInterface $current_user
  *   The current user.
  * @param \Drupal\disqus\DisqusCommentManager $disqus_manager
  *   The disqus comment manager object.
  * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
  *   The config factory.
  */
 public function __construct(array $configuration, $plugin_id, $plugin_definition, AccountInterface $current_user, DisqusCommentManager $disqus_manager, ConfigFactoryInterface $config_factory)
 {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
     $this->currentUser = $current_user;
     $this->disqusManager = $disqus_manager;
     $this->config = $config_factory->get('disqus.settings');
 }

 /**
  * {@inheritdoc}
  */
 public function buildOptionsForm(&$form, FormStateInterface $form_state)
 {
     parent::buildOptionsForm($form, $form_state);
     $options = array('' => t('- All -'));
     $options += JobItem::getStates();
     $form['state'] = array('#title' => t('Job item state'), '#description' => t('Count only job items of a certain state.'), '#type' => 'select', '#options' => $options, '#default_value' => $this->options['state']);
 }

 /**
  * {@inheritdoc}
  */
 public function buildOptionsForm(&$form, FormStateInterface $form_state)
 {
     parent::buildOptionsForm($form, $form_state);
     $form['range'] = array('#type' => 'textfield', '#title' => t('Range'), '#description' => t('The range of weights available to select. For
     example, a range of 20 will allow you to select a weight between -20
     and 20.'), '#default_value' => $this->options['range'], '#size' => 5);
 }

 /**
  * {@inheritdoc}
  */
 public function buildOptionsForm(&$form, FormStateInterface $form_state)
 {
     parent::buildOptionsForm($form, $form_state);
     // Only show fields that precede this one.
     $field_options = $this->getPreviousFieldLabels();
     $form['fields'] = array('#type' => 'checkboxes', '#title' => $this->t('Fields'), '#description' => $this->t('Fields to be included as links.'), '#options' => $field_options, '#default_value' => $this->options['fields']);
     $form['destination'] = array('#type' => 'checkbox', '#title' => $this->t('Include destination'), '#description' => $this->t('Include a "destination" parameter in the link to return the user to the original view upon completing the link action.'), '#default_value' => $this->options['destination']);
 }

 /**
  * {@inheritdoc}
  */
 public function buildOptionsForm(&$form, FormStateInterface $form_state)
 {
     $form['text'] = array('#type' => 'textfield', '#title' => $this->t('Text to display'), '#default_value' => $this->options['text']);
     parent::buildOptionsForm($form, $form_state);
     // The path is set by renderLink function so don't allow to set it.
     $form['alter']['path'] = array('#access' => FALSE);
     $form['alter']['external'] = array('#access' => FALSE);
 }

 /**
  * {@inheritdoc}
  */
 public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL)
 {
     parent::init($view, $display, $options);
     $this->format = $this->definition['format'];
     $this->additional_fields = array();
     if (is_array($this->format)) {
         $this->additional_fields['format'] = $this->format;
     }
 }

 /**
  * @inheritdoc
  */
 public function submitOptionsForm(&$form, FormStateInterface $form_state)
 {
     // Merge plural format options into one string and drop the individual
     // option values.
     $options =& $form_state->getValue('options');
     $options['format_plural_string'] = implode(LOCALE_PLURAL_DELIMITER, $options['format_plural_values']);
     unset($options['format_plural_values']);
     parent::submitOptionsForm($form, $form_state);
 }

 public function buildOptionsForm(&$form, &$form_state)
 {
     parent::buildOptionsForm($form, $form_state);
     // Remove the checkbox
     unset($form['alter']['alter_text']);
     unset($form['alter']['text']['#states']);
     unset($form['alter']['help']['#states']);
     $form['#pre_render'][] = array($this, 'preRenderCustomForm');
 }

 /**
  * @inheritDoc
  */
 public function getValue(ResultRow $values, $field = NULL)
 {
     $value = NULL;
     $cat_id = parent::getValue($values, $field);
     if ($cat_id) {
         $value = $this->entityStorage->load($cat_id)->getName();
     }
     return $value;
 }

 /**
  * {@inheritdoc}
  */
 public function buildOptionsForm(&$form, FormStateInterface $form_state)
 {
     $form['text'] = ['#type' => 'textfield', '#title' => $this->t('Text to display'), '#default_value' => $this->options['text']];
     parent::buildOptionsForm($form, $form_state);
     // The path is set by ::renderLink() so we do not allow to set it.
     $form['alter'] += ['path' => [], 'query' => [], 'external' => []];
     $form['alter']['path'] += ['#access' => FALSE];
     $form['alter']['query'] += ['#access' => FALSE];
     $form['alter']['external'] += ['#access' => FALSE];
 }

 /**
  * Constructs a new instance.
  *
  * @param mixed[] $configuration
  *   A configuration array containing information about the plugin instance.
  * @param string $plugin_id
  *   The plugin_id for the plugin instance.
  * @param mixed $plugin_definition
  *   The plugin implementation definition.
  * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
  *   The string translator.
  * @param \Drupal\Core\Entity\EntityStorageInterface $currency_storage
  *   THe currency storage.
  *
  * @throws \InvalidArgumentException
  */
 public function __construct(array $configuration, $plugin_id, array $plugin_definition, TranslationInterface $string_translation, EntityStorageInterface $currency_storage)
 {
     if (!isset($configuration['currency_method'])) {
         throw new \InvalidArgumentException('Missing currency_method definition.');
     } elseif (!method_exists(CurrencyInterface::class, $configuration['currency_method'])) {
         throw new \InvalidArgumentException(sprintf('Method %s does not exist on \\Drupal\\currency\\Entity\\CurrencyInterface.', $configuration['currency_method']));
     }
     parent::__construct($configuration, $plugin_id, $plugin_definition);
     $this->currencyStorage = $currency_storage;
     $this->stringTranslation = $string_translation;
 }

 /**
  * {@inheritdoc}
  */
 public function buildOptionsForm(&$form, FormStateInterface $form_state)
 {
     foreach ($this->formats as $key => $item) {
         $options[$key] = implode('/', $item);
     }
     $form['type'] = array('#type' => 'select', '#title' => $this->t('Output format'), '#options' => $options, '#default_value' => $this->options['type']);
     $form['type_custom_true'] = array('#type' => 'textfield', '#title' => $this->t('Custom output for TRUE'), '#default_value' => $this->options['type_custom_true'], '#states' => array('visible' => array('select[name="options[type]"]' => array('value' => 'custom'))));
     $form['type_custom_false'] = array('#type' => 'textfield', '#title' => $this->t('Custom output for FALSE'), '#default_value' => $this->options['type_custom_false'], '#states' => array('visible' => array('select[name="options[type]"]' => array('value' => 'custom'))));
     $form['not'] = array('#type' => 'checkbox', '#title' => $this->t('Reverse'), '#description' => $this->t('If checked, true will be displayed as false.'), '#default_value' => $this->options['not']);
     parent::buildOptionsForm($form, $form_state);
 }

 /**
  * {@inheritdoc}
  */
 public function buildOptionsForm(&$form, FormStateInterface $form_state)
 {
     parent::buildOptionsForm($form, $form_state);
     $modules = $this->moduleHandler->getModuleList();
     $names = array();
     foreach (array_keys($modules) as $name) {
         $names[$name] = $this->moduleHandler->getName($name);
     }
     $form['data_module'] = array('#title' => $this->t('Module name'), '#type' => 'select', '#description' => $this->t('The module which sets this user data.'), '#default_value' => $this->options['data_module'], '#options' => $names);
     $form['data_name'] = array('#title' => $this->t('Name'), '#type' => 'textfield', '#description' => $this->t('The name of the data key.'), '#default_value' => $this->options['data_name']);
 }

 /**
  * {@inheritdoc}
  */
 public function preRender(&$values)
 {
     parent::preRender($values);
     // If the view is using a table style, provide a placeholder for a
     // "select all" checkbox.
     if (!empty($this->view->style_plugin) && $this->view->style_plugin instanceof Table) {
         // Add the tableselect css classes.
         $this->options['element_label_class'] .= 'select-all';
         // Hide the actual label of the field on the table header.
         $this->options['label'] = '';
     }
 }