abstract class FieldPluginBase in Drupal 9

Base class for views fields.

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
    • class \Drupal\views\Plugin\views\PluginBase implements DependentPluginInterface, ContainerFactoryPluginInterface, TrustedCallbackInterface, ViewsPluginInterface
      • class \Drupal\views\Plugin\views\HandlerBase implements ViewsHandlerInterface
        • class \Drupal\views\Plugin\views\field\FieldPluginBase implements FieldHandlerInterface

Related topics

Views field handler plugins

Handler plugins for Views fields.

Views field handler plugins

Handler plugins for Views fields.

13 files declare their use of FieldPluginBase

ContextualLinks.php in core/modules/contextual/src/Plugin/views/field/ContextualLinks.php

DblogMessage.php in core/modules/dblog/src/Plugin/views/field/DblogMessage.php

DblogOperations.php in core/modules/dblog/src/Plugin/views/field/DblogOperations.php

EntityLink.php in core/modules/comment/src/Plugin/views/field/EntityLink.php

FieldFormButtonTest.php in core/modules/views/tests/modules/views_test_data/src/Plugin/views/field/FieldFormButtonTest.php

... See full list

File

core/modules/views/src/Plugin/views/field/FieldPluginBase.php, line 52

Namespace

Drupal\views\Plugin\views\field

abstract class FieldPluginBase extends HandlerBase implements FieldHandlerInterface {

  /**
   * Indicator of the renderText() method for rendering a single item.
   * (If no render_item() is present).
   */
  const RENDER_TEXT_PHASE_SINGLE_ITEM = 0;

  /**
   * Indicator of the renderText() method for rendering the whole element.
   * (if no render_item() method is available).
   */
  const RENDER_TEXT_PHASE_COMPLETELY = 1;

  /**
   * Indicator of the renderText() method for rendering the empty text.
   */
  const RENDER_TEXT_PHASE_EMPTY = 2;

  /**
   * @var string
   */
  public $field_alias = 'unknown';
  public $aliases = [];

  /**
   * The field value prior to any rewriting.
   *
   * @var mixed
   */
  public $original_value = NULL;

  /**
   * Stores additional fields which get added to the query.
   *
   * The generated aliases are stored in $aliases.
   *
   * @var array
   */
  public $additional_fields = [];

  /**
   * The link generator.
   *
   * @var \Drupal\Core\Utility\LinkGeneratorInterface
   */
  protected $linkGenerator;

  /**
   * Stores the render API renderer.
   *
   * @var \Drupal\Core\Render\RendererInterface
   */
  protected $renderer;

  /**
   * Keeps track of the last render index.
   *
   * @var int|null
   */
  protected $lastRenderIndex;

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

  /**
   * Determine if this field can allow advanced rendering.
   *
   * Fields can set this to FALSE if they do not wish to allow
   * token based rewriting or link-making.
   */
  protected function allowAdvancedRender() {
    return TRUE;
  }

  /**
   * Called to add the field to a query.
   */
  public function query() {
    $this
      ->ensureMyTable();

    // Add the field.
    $params = $this->options['group_type'] != 'group' ? [
      'function' => $this->options['group_type'],
    ] : [];
    $this->field_alias = $this->query
      ->addField($this->tableAlias, $this->realField, NULL, $params);
    $this
      ->addAdditionalFields();
  }

  /**
   * Add 'additional' fields to the query.
   *
   * @param $fields
   *   An array of fields. The key is an identifier used to later find the
   *   field alias used. The value is either a string in which case it's
   *   assumed to be a field on this handler's table; or it's an array in the
   *   form of
   *   @code array('table' => $tablename, 'field' => $fieldname) @endcode
   */
  protected function addAdditionalFields($fields = NULL) {
    if (!isset($fields)) {

      // notice check
      if (empty($this->additional_fields)) {
        return;
      }
      $fields = $this->additional_fields;
    }
    $group_params = [];
    if ($this->options['group_type'] != 'group') {
      $group_params = [
        'function' => $this->options['group_type'],
      ];
    }
    if (!empty($fields) && is_array($fields)) {
      foreach ($fields as $identifier => $info) {
        if (is_array($info)) {
          if (isset($info['table'])) {
            $table_alias = $this->query
              ->ensureTable($info['table'], $this->relationship);
          }
          else {
            $table_alias = $this->tableAlias;
          }
          if (empty($table_alias)) {
            trigger_error(sprintf("Handler %s tried to add additional_field %s but %s could not be added!", $this->definition['id'], $identifier, $info['table']), E_USER_WARNING);
            $this->aliases[$identifier] = 'broken';
            continue;
          }
          $params = [];
          if (!empty($info['params'])) {
            $params = $info['params'];
          }
          $params += $group_params;
          $this->aliases[$identifier] = $this->query
            ->addField($table_alias, $info['field'], NULL, $params);
        }
        else {
          $this->aliases[$info] = $this->query
            ->addField($this->tableAlias, $info, NULL, $group_params);
        }
      }
    }
  }

  /**
   * {@inheritdoc}
   */
  public function clickSort($order) {
    if (isset($this->field_alias)) {

      // Since fields should always have themselves already added, just
      // add a sort on the field.
      $params = $this->options['group_type'] != 'group' ? [
        'function' => $this->options['group_type'],
      ] : [];
      $this->query
        ->addOrderBy(NULL, NULL, $order, $this->field_alias, $params);
    }
  }

  /**
   * {@inheritdoc}
   */
  public function clickSortable() {
    return isset($this->definition['click sortable']) ? $this->definition['click sortable'] : TRUE;
  }

  /**
   * {@inheritdoc}
   */
  public function label() {
    if (!isset($this->options['label'])) {
      return '';
    }
    return $this->options['label'];
  }

  /**
   * {@inheritdoc}
   */
  public function elementType($none_supported = FALSE, $default_empty = FALSE, $inline = FALSE) {
    if ($none_supported) {
      if ($this->options['element_type'] === '0') {
        return '';
      }
    }
    if ($this->options['element_type']) {
      return $this->options['element_type'];
    }
    if ($default_empty) {
      return '';
    }
    if ($inline) {
      return 'span';
    }
    if (isset($this->definition['element type'])) {
      return $this->definition['element type'];
    }
    return 'span';
  }

  /**
   * {@inheritdoc}
   */
  public function elementLabelType($none_supported = FALSE, $default_empty = FALSE) {
    if ($none_supported) {
      if ($this->options['element_label_type'] === '0') {
        return '';
      }
    }
    if ($this->options['element_label_type']) {
      return $this->options['element_label_type'];
    }
    if ($default_empty) {
      return '';
    }
    return 'span';
  }

  /**
   * {@inheritdoc}
   */
  public function elementWrapperType($none_supported = FALSE, $default_empty = FALSE) {
    if ($none_supported) {
      if ($this->options['element_wrapper_type'] === '0') {
        return 0;
      }
    }
    if ($this->options['element_wrapper_type']) {
      return $this->options['element_wrapper_type'];
    }
    if ($default_empty) {
      return '';
    }
    return 'div';
  }

  /**
   * {@inheritdoc}
   */
  public function getElements() {
    static $elements = NULL;
    if (!isset($elements)) {

      // @todo Add possible html5 elements.
      $elements = [
        '' => $this
          ->t('- Use default -'),
        '0' => $this
          ->t('- None -'),
      ];
      $elements += \Drupal::config('views.settings')
        ->get('field_rewrite_elements');
    }
    return $elements;
  }

  /**
   * {@inheritdoc}
   */
  public function elementClasses($row_index = NULL) {
    $classes = $this
      ->tokenizeValue($this->options['element_class'], $row_index);
    $classes = explode(' ', $classes);
    foreach ($classes as &$class) {
      $class = Html::cleanCssIdentifier($class);
    }
    return implode(' ', $classes);
  }

  /**
   * {@inheritdoc}
   */
  public function tokenizeValue($value, $row_index = NULL) {
    if (strpos($value, '{{') !== FALSE) {
      $fake_item = [
        'alter_text' => TRUE,
        'text' => $value,
      ];

      // Use isset() because empty() will trigger on 0 and 0 is
      // the first row.
      if (isset($row_index) && isset($this->view->style_plugin->render_tokens[$row_index])) {
        $tokens = $this->view->style_plugin->render_tokens[$row_index];
      }
      else {

        // Get tokens from the last field.
        $last_field = end($this->view->field);
        if (isset($last_field->last_tokens)) {
          $tokens = $last_field->last_tokens;
        }
        else {
          $tokens = $last_field
            ->getRenderTokens($fake_item);
        }
      }
      $value = strip_tags($this
        ->renderAltered($fake_item, $tokens));
      if (!empty($this->options['alter']['trim_whitespace'])) {
        $value = trim($value);
      }
    }
    return $value;
  }

  /**
   * {@inheritdoc}
   */
  public function elementLabelClasses($row_index = NULL) {
    $classes = $this
      ->tokenizeValue($this->options['element_label_class'], $row_index);
    $classes = explode(' ', $classes);
    foreach ($classes as &$class) {
      $class = Html::cleanCssIdentifier($class);
    }
    return implode(' ', $classes);
  }

  /**
   * {@inheritdoc}
   */
  public function elementWrapperClasses($row_index = NULL) {
    $classes = $this
      ->tokenizeValue($this->options['element_wrapper_class'], $row_index);
    $classes = explode(' ', $classes);
    foreach ($classes as &$class) {
      $class = Html::cleanCssIdentifier($class);
    }
    return implode(' ', $classes);
  }

  /**
   * {@inheritdoc}
   */
  public function getEntity(ResultRow $values) {
    $relationship_id = $this->options['relationship'];
    if ($relationship_id == 'none') {
      return $values->_entity;
    }
    elseif (isset($values->_relationship_entities[$relationship_id])) {
      return $values->_relationship_entities[$relationship_id];
    }
  }

  /**
   * {@inheritdoc}
   */
  public function getValue(ResultRow $values, $field = NULL) {
    $alias = isset($field) ? $this->aliases[$field] : $this->field_alias;
    if (isset($values->{$alias})) {
      return $values->{$alias};
    }
  }

  /**
   * {@inheritdoc}
   */
  public function useStringGroupBy() {
    return TRUE;
  }
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['label'] = [
      'default' => '',
    ];

    // Some styles (for example table) should have labels enabled by default.
    $style = $this->view
      ->getStyle();
    if (isset($style) && $style
      ->defaultFieldLabels()) {
      $options['label']['default'] = $this->definition['title'];
    }
    $options['exclude'] = [
      'default' => FALSE,
    ];
    $options['alter'] = [
      'contains' => [
        'alter_text' => [
          'default' => FALSE,
        ],
        'text' => [
          'default' => '',
        ],
        'make_link' => [
          'default' => FALSE,
        ],
        'path' => [
          'default' => '',
        ],
        'absolute' => [
          'default' => FALSE,
        ],
        'external' => [
          'default' => FALSE,
        ],
        'replace_spaces' => [
          'default' => FALSE,
        ],
        'path_case' => [
          'default' => 'none',
        ],
        'trim_whitespace' => [
          'default' => FALSE,
        ],
        'alt' => [
          'default' => '',
        ],
        'rel' => [
          'default' => '',
        ],
        'link_class' => [
          'default' => '',
        ],
        'prefix' => [
          'default' => '',
        ],
        'suffix' => [
          'default' => '',
        ],
        'target' => [
          'default' => '',
        ],
        'nl2br' => [
          'default' => FALSE,
        ],
        'max_length' => [
          'default' => 0,
        ],
        'word_boundary' => [
          'default' => TRUE,
        ],
        'ellipsis' => [
          'default' => TRUE,
        ],
        'more_link' => [
          'default' => FALSE,
        ],
        'more_link_text' => [
          'default' => '',
        ],
        'more_link_path' => [
          'default' => '',
        ],
        'strip_tags' => [
          'default' => FALSE,
        ],
        'trim' => [
          'default' => FALSE,
        ],
        'preserve_tags' => [
          'default' => '',
        ],
        'html' => [
          'default' => FALSE,
        ],
      ],
    ];
    $options['element_type'] = [
      'default' => '',
    ];
    $options['element_class'] = [
      'default' => '',
    ];
    $options['element_label_type'] = [
      'default' => '',
    ];
    $options['element_label_class'] = [
      'default' => '',
    ];
    $options['element_label_colon'] = [
      'default' => TRUE,
    ];
    $options['element_wrapper_type'] = [
      'default' => '',
    ];
    $options['element_wrapper_class'] = [
      'default' => '',
    ];
    $options['element_default_classes'] = [
      'default' => TRUE,
    ];
    $options['empty'] = [
      'default' => '',
    ];
    $options['hide_empty'] = [
      'default' => FALSE,
    ];
    $options['empty_zero'] = [
      'default' => FALSE,
    ];
    $options['hide_alter_empty'] = [
      'default' => TRUE,
    ];
    return $options;
  }

  /**
   * Performs some cleanup tasks on the options array before saving it.
   */
  public function submitOptionsForm(&$form, FormStateInterface $form_state) {
    $options =& $form_state
      ->getValue('options');
    $types = [
      'element_type',
      'element_label_type',
      'element_wrapper_type',
    ];
    $classes = array_combine([
      'element_class',
      'element_label_class',
      'element_wrapper_class',
    ], $types);
    foreach ($types as $type) {
      if (!$options[$type . '_enable']) {
        $options[$type] = '';
      }
    }
    foreach ($classes as $class => $type) {
      if (!$options[$class . '_enable'] || !$options[$type . '_enable']) {
        $options[$class] = '';
      }
    }
    if (empty($options['custom_label'])) {
      $options['label'] = '';
      $options['element_label_colon'] = FALSE;
    }
  }

  /**
   * Default options form that provides the label widget that all fields
   * should have.
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);
    $label = $this
      ->label();
    $form['custom_label'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Create a label'),
      '#default_value' => $label !== '',
      '#weight' => -103,
    ];
    $form['label'] = [
      '#type' => 'textfield',
      '#title' => $this
        ->t('Label'),
      '#default_value' => $label,
      '#states' => [
        'visible' => [
          ':input[name="options[custom_label]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#weight' => -102,
    ];
    $form['element_label_colon'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Place a colon after the label'),
      '#default_value' => $this->options['element_label_colon'],
      '#states' => [
        'visible' => [
          ':input[name="options[custom_label]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#weight' => -101,
    ];
    $form['exclude'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Exclude from display'),
      '#default_value' => $this->options['exclude'],
      '#description' => $this
        ->t('Enable to load this field as hidden. Often used to group fields, or to use as token in another field.'),
      '#weight' => -100,
    ];
    $form['style_settings'] = [
      '#type' => 'details',
      '#title' => $this
        ->t('Style settings'),
      '#weight' => 99,
    ];
    $form['element_type_enable'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Customize field HTML'),
      '#default_value' => !empty($this->options['element_type']) || (string) $this->options['element_type'] == '0' || !empty($this->options['element_class']) || (string) $this->options['element_class'] == '0',
      '#fieldset' => 'style_settings',
    ];
    $form['element_type'] = [
      '#title' => $this
        ->t('HTML element'),
      '#options' => $this
        ->getElements(),
      '#type' => 'select',
      '#default_value' => $this->options['element_type'],
      '#description' => $this
        ->t('Choose the HTML element to wrap around this field, e.g. H1, H2, etc.'),
      '#states' => [
        'visible' => [
          ':input[name="options[element_type_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#fieldset' => 'style_settings',
    ];
    $form['element_class_enable'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Create a CSS class'),
      '#states' => [
        'visible' => [
          ':input[name="options[element_type_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#default_value' => !empty($this->options['element_class']) || (string) $this->options['element_class'] == '0',
      '#fieldset' => 'style_settings',
    ];
    $form['element_class'] = [
      '#title' => $this
        ->t('CSS class'),
      '#description' => $this
        ->t('You may use token substitutions from the rewriting section in this class.'),
      '#type' => 'textfield',
      '#default_value' => $this->options['element_class'],
      '#states' => [
        'visible' => [
          ':input[name="options[element_type_enable]"]' => [
            'checked' => TRUE,
          ],
          ':input[name="options[element_class_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#fieldset' => 'style_settings',
    ];
    $form['element_label_type_enable'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Customize label HTML'),
      '#default_value' => !empty($this->options['element_label_type']) || (string) $this->options['element_label_type'] == '0' || !empty($this->options['element_label_class']) || (string) $this->options['element_label_class'] == '0',
      '#fieldset' => 'style_settings',
    ];
    $form['element_label_type'] = [
      '#title' => $this
        ->t('Label HTML element'),
      '#options' => $this
        ->getElements(FALSE),
      '#type' => 'select',
      '#default_value' => $this->options['element_label_type'],
      '#description' => $this
        ->t('Choose the HTML element to wrap around this label, e.g. H1, H2, etc.'),
      '#states' => [
        'visible' => [
          ':input[name="options[element_label_type_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#fieldset' => 'style_settings',
    ];
    $form['element_label_class_enable'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Create a CSS class'),
      '#states' => [
        'visible' => [
          ':input[name="options[element_label_type_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#default_value' => !empty($this->options['element_label_class']) || (string) $this->options['element_label_class'] == '0',
      '#fieldset' => 'style_settings',
    ];
    $form['element_label_class'] = [
      '#title' => $this
        ->t('CSS class'),
      '#description' => $this
        ->t('You may use token substitutions from the rewriting section in this class.'),
      '#type' => 'textfield',
      '#default_value' => $this->options['element_label_class'],
      '#states' => [
        'visible' => [
          ':input[name="options[element_label_type_enable]"]' => [
            'checked' => TRUE,
          ],
          ':input[name="options[element_label_class_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#fieldset' => 'style_settings',
    ];
    $form['element_wrapper_type_enable'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Customize field and label wrapper HTML'),
      '#default_value' => !empty($this->options['element_wrapper_type']) || (string) $this->options['element_wrapper_type'] == '0' || !empty($this->options['element_wrapper_class']) || (string) $this->options['element_wrapper_class'] == '0',
      '#fieldset' => 'style_settings',
    ];
    $form['element_wrapper_type'] = [
      '#title' => $this
        ->t('Wrapper HTML element'),
      '#options' => $this
        ->getElements(FALSE),
      '#type' => 'select',
      '#default_value' => $this->options['element_wrapper_type'],
      '#description' => $this
        ->t('Choose the HTML element to wrap around this field and label, e.g. H1, H2, etc. This may not be used if the field and label are not rendered together, such as with a table.'),
      '#states' => [
        'visible' => [
          ':input[name="options[element_wrapper_type_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#fieldset' => 'style_settings',
    ];
    $form['element_wrapper_class_enable'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Create a CSS class'),
      '#states' => [
        'visible' => [
          ':input[name="options[element_wrapper_type_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#default_value' => !empty($this->options['element_wrapper_class']) || (string) $this->options['element_wrapper_class'] == '0',
      '#fieldset' => 'style_settings',
    ];
    $form['element_wrapper_class'] = [
      '#title' => $this
        ->t('CSS class'),
      '#description' => $this
        ->t('You may use token substitutions from the rewriting section in this class.'),
      '#type' => 'textfield',
      '#default_value' => $this->options['element_wrapper_class'],
      '#states' => [
        'visible' => [
          ':input[name="options[element_wrapper_class_enable]"]' => [
            'checked' => TRUE,
          ],
          ':input[name="options[element_wrapper_type_enable]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
      '#fieldset' => 'style_settings',
    ];
    $form['element_default_classes'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Add default classes'),
      '#default_value' => $this->options['element_default_classes'],
      '#description' => $this
        ->t('Use default Views classes to identify the field, field label and field content.'),
      '#fieldset' => 'style_settings',
    ];
    $form['alter'] = [
      '#title' => $this
        ->t('Rewrite results'),
      '#type' => 'details',
      '#weight' => 100,
    ];
    if ($this
      ->allowAdvancedRender()) {
      $form['alter']['#tree'] = TRUE;
      $form['alter']['alter_text'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Override the output of this field with custom text'),
        '#default_value' => $this->options['alter']['alter_text'],
      ];
      $form['alter']['text'] = [
        '#title' => $this
          ->t('Text'),
        '#type' => 'textarea',
        '#default_value' => $this->options['alter']['text'],
        // The tag list will be escaped.
        '#description' => $this
          ->t('The text to display for this field. You may enter data from this view as per the "Replacement patterns" below. You may include <a href="@twig_docs">Twig</a> or the following allowed HTML tags: <code>@tags</code>', [
          '@twig_docs' => 'https://twig.symfony.com/doc/' . Environment::MAJOR_VERSION . '.x',
          '@tags' => '<' . implode('> <', Xss::getAdminTagList()) . '>',
        ]),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][alter_text]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['make_link'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Output this field as a custom link'),
        '#default_value' => $this->options['alter']['make_link'],
      ];
      $form['alter']['path'] = [
        '#title' => $this
          ->t('Link path'),
        '#type' => 'textfield',
        '#default_value' => $this->options['alter']['path'],
        '#description' => $this
          ->t('The Drupal path or absolute URL for this link. You may enter data from this view as per the "Replacement patterns" below.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
        '#maxlength' => 255,
      ];
      $form['alter']['absolute'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Use absolute path'),
        '#default_value' => $this->options['alter']['absolute'],
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['replace_spaces'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Replace spaces with dashes'),
        '#default_value' => $this->options['alter']['replace_spaces'],
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['external'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('External server URL'),
        '#default_value' => $this->options['alter']['external'],
        '#description' => $this
          ->t("Links to an external server using a full URL: e.g. 'http://www.example.com' or 'www.example.com'."),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['path_case'] = [
        '#type' => 'select',
        '#title' => $this
          ->t('Transform the case'),
        '#description' => $this
          ->t('When printing URL paths, how to transform the case of the filter value.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
        '#options' => [
          'none' => $this
            ->t('No transform'),
          'upper' => $this
            ->t('Upper case'),
          'lower' => $this
            ->t('Lower case'),
          'ucfirst' => $this
            ->t('Capitalize first letter'),
          'ucwords' => $this
            ->t('Capitalize each word'),
        ],
        '#default_value' => $this->options['alter']['path_case'],
      ];
      $form['alter']['link_class'] = [
        '#title' => $this
          ->t('Link class'),
        '#type' => 'textfield',
        '#default_value' => $this->options['alter']['link_class'],
        '#description' => $this
          ->t('The CSS class to apply to the link.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['alt'] = [
        '#title' => $this
          ->t('Title text'),
        '#type' => 'textfield',
        '#default_value' => $this->options['alter']['alt'],
        '#description' => $this
          ->t('Text to place as "title" text which most browsers display as a tooltip when hovering over the link.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['rel'] = [
        '#title' => $this
          ->t('Rel Text'),
        '#type' => 'textfield',
        '#default_value' => $this->options['alter']['rel'],
        '#description' => $this
          ->t('Include Rel attribute for use in lightbox2 or other javascript utility.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['prefix'] = [
        '#title' => $this
          ->t('Prefix text'),
        '#type' => 'textfield',
        '#default_value' => $this->options['alter']['prefix'],
        '#description' => $this
          ->t('Any text to display before this link. You may include HTML.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['suffix'] = [
        '#title' => $this
          ->t('Suffix text'),
        '#type' => 'textfield',
        '#default_value' => $this->options['alter']['suffix'],
        '#description' => $this
          ->t('Any text to display after this link. You may include HTML.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['target'] = [
        '#title' => $this
          ->t('Target'),
        '#type' => 'textfield',
        '#default_value' => $this->options['alter']['target'],
        '#description' => $this
          ->t("Target of the link, such as _blank, _parent or an iframe's name. This field is rarely used."),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][make_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];

      // Get a list of the available fields and arguments for token replacement.
      // Setup the tokens for fields.
      $previous = $this
        ->getPreviousFieldLabels();
      $optgroup_arguments = (string) t('Arguments');
      $optgroup_fields = (string) t('Fields');
      foreach ($previous as $id => $label) {
        $options[$optgroup_fields]["{{ {$id} }}"] = substr(strrchr($label, ":"), 2);
      }

      // Add the field to the list of options.
      $options[$optgroup_fields]["{{ {$this->options['id']} }}"] = substr(strrchr($this
        ->adminLabel(), ":"), 2);
      foreach ($this->view->display_handler
        ->getHandlers('argument') as $arg => $handler) {
        $options[$optgroup_arguments]["{{ arguments.{$arg} }}"] = $this
          ->t('@argument title', [
          '@argument' => $handler
            ->adminLabel(),
        ]);
        $options[$optgroup_arguments]["{{ raw_arguments.{$arg} }}"] = $this
          ->t('@argument input', [
          '@argument' => $handler
            ->adminLabel(),
        ]);
      }
      $this
        ->documentSelfTokens($options[$optgroup_fields]);

      // Default text.
      $output = [];
      $output[] = [
        '#markup' => '<p>' . $this
          ->t('You must add some additional fields to this display before using this field. These fields may be marked as <em>Exclude from display</em> if you prefer. Note that due to rendering order, you cannot use fields that come after this field; if you need a field not listed here, rearrange your fields.') . '</p>',
      ];

      // We have some options, so make a list.
      if (!empty($options)) {
        $output[] = [
          '#markup' => '<p>' . $this
            ->t("The following replacement tokens are available for this field. Note that due to rendering order, you cannot use fields that come after this field; if you need a field not listed here, rearrange your fields.") . '</p>',
        ];
        foreach (array_keys($options) as $type) {
          if (!empty($options[$type])) {
            $items = [];
            foreach ($options[$type] as $key => $value) {
              $items[] = $key . ' == ' . $value;
            }
            $item_list = [
              '#theme' => 'item_list',
              '#items' => $items,
            ];
            $output[] = $item_list;
          }
        }
      }

      // This construct uses 'hidden' and not markup because process doesn't
      // run. It also has an extra div because the dependency wants to hide
      // the parent in situations like this, so we need a second div to
      // make this work.
      $form['alter']['help'] = [
        '#type' => 'details',
        '#title' => $this
          ->t('Replacement patterns'),
        '#value' => $output,
        '#states' => [
          'visible' => [
            [
              ':input[name="options[alter][make_link]"]' => [
                'checked' => TRUE,
              ],
            ],
            [
              ':input[name="options[alter][alter_text]"]' => [
                'checked' => TRUE,
              ],
            ],
            [
              ':input[name="options[alter][more_link]"]' => [
                'checked' => TRUE,
              ],
            ],
          ],
        ],
      ];
      $form['alter']['trim'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Trim this field to a maximum number of characters'),
        '#default_value' => $this->options['alter']['trim'],
      ];
      $form['alter']['max_length'] = [
        '#title' => $this
          ->t('Maximum number of characters'),
        '#type' => 'textfield',
        '#default_value' => $this->options['alter']['max_length'],
        '#states' => [
          'visible' => [
            ':input[name="options[alter][trim]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['word_boundary'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Trim only on a word boundary'),
        '#description' => $this
          ->t('If checked, this field be trimmed only on a word boundary. This is guaranteed to be the maximum characters stated or less. If there are no word boundaries this could trim a field to nothing.'),
        '#default_value' => $this->options['alter']['word_boundary'],
        '#states' => [
          'visible' => [
            ':input[name="options[alter][trim]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['ellipsis'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Add "…" at the end of trimmed text'),
        '#default_value' => $this->options['alter']['ellipsis'],
        '#states' => [
          'visible' => [
            ':input[name="options[alter][trim]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['more_link'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Add a read-more link if output is trimmed'),
        '#default_value' => $this->options['alter']['more_link'],
        '#states' => [
          'visible' => [
            ':input[name="options[alter][trim]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['more_link_text'] = [
        '#type' => 'textfield',
        '#title' => $this
          ->t('More link label'),
        '#default_value' => $this->options['alter']['more_link_text'],
        '#description' => $this
          ->t('You may use the "Replacement patterns" above.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][trim]"]' => [
              'checked' => TRUE,
            ],
            ':input[name="options[alter][more_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['more_link_path'] = [
        '#type' => 'textfield',
        '#title' => $this
          ->t('More link path'),
        '#default_value' => $this->options['alter']['more_link_path'],
        '#description' => $this
          ->t('This can be an internal Drupal path such as node/add or an external URL such as "https://www.drupal.org". You may use the "Replacement patterns" above.'),
        '#states' => [
          'visible' => [
            ':input[name="options[alter][trim]"]' => [
              'checked' => TRUE,
            ],
            ':input[name="options[alter][more_link]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['html'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Field can contain HTML'),
        '#description' => $this
          ->t('An HTML corrector will be run to ensure HTML tags are properly closed after trimming.'),
        '#default_value' => $this->options['alter']['html'],
        '#states' => [
          'visible' => [
            ':input[name="options[alter][trim]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['strip_tags'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Strip HTML tags'),
        '#default_value' => $this->options['alter']['strip_tags'],
      ];
      $form['alter']['preserve_tags'] = [
        '#type' => 'textfield',
        '#title' => $this
          ->t('Preserve certain tags'),
        '#description' => $this
          ->t('List the tags that need to be preserved during the stripping process. example &quot;&lt;p&gt; &lt;br&gt;&quot; which will preserve all p and br elements'),
        '#default_value' => $this->options['alter']['preserve_tags'],
        '#states' => [
          'visible' => [
            ':input[name="options[alter][strip_tags]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
      $form['alter']['trim_whitespace'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Remove whitespace'),
        '#default_value' => $this->options['alter']['trim_whitespace'],
      ];
      $form['alter']['nl2br'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Convert newlines to HTML &lt;br&gt; tags'),
        '#default_value' => $this->options['alter']['nl2br'],
      ];
    }
    $form['empty_field_behavior'] = [
      '#type' => 'details',
      '#title' => $this
        ->t('No results behavior'),
      '#weight' => 100,
    ];
    $form['empty'] = [
      '#type' => 'textarea',
      '#title' => $this
        ->t('No results text'),
      '#default_value' => $this->options['empty'],
      '#description' => $this
        ->t('Provide text to display if this field contains an empty result. You may include HTML. You may enter data from this view as per the "Replacement patterns" in the "Rewrite Results" section above.'),
      '#fieldset' => 'empty_field_behavior',
    ];
    $form['empty_zero'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Count the number 0 as empty'),
      '#default_value' => $this->options['empty_zero'],
      '#description' => $this
        ->t('Enable to display the "no results text" if the field contains the number 0.'),
      '#fieldset' => 'empty_field_behavior',
    ];
    $form['hide_empty'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Hide if empty'),
      '#default_value' => $this->options['hide_empty'],
      '#description' => $this
        ->t('Enable to hide this field if it is empty. Note that the field label or rewritten output may still be displayed. To hide labels, check the style or row style settings for empty fields. To hide rewritten content, check the "Hide rewriting if empty" checkbox.'),
      '#fieldset' => 'empty_field_behavior',
    ];
    $form['hide_alter_empty'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Hide rewriting if empty'),
      '#default_value' => $this->options['hide_alter_empty'],
      '#description' => $this
        ->t('Do not display rewritten content if this field is empty.'),
      '#fieldset' => 'empty_field_behavior',
    ];
  }

  /**
   * Returns all field labels of fields before this field.
   *
   * @return array
   *   An array of field labels keyed by their field IDs.
   */
  protected function getPreviousFieldLabels() {
    $all_fields = $this->view->display_handler
      ->getFieldLabels();
    $field_options = array_slice($all_fields, 0, array_search($this->options['id'], array_keys($all_fields)));
    return $field_options;
  }

  /**
   * Provide extra data to the administration form.
   */
  public function adminSummary() {
    return $this
      ->label();
  }

  /**
   * {@inheritdoc}
   */
  public function preRender(&$values) {
  }

  /**
   * {@inheritdoc}
   */
  public function render(ResultRow $values) {
    $value = $this
      ->getValue($values);
    return $this
      ->sanitizeValue($value);
  }

  /**
   * {@inheritdoc}
   */
  public function postRender(ResultRow $row, $output) {

    // Make sure the last rendered value is available also when this is
    // retrieved from cache.
    $this->last_render = $output;
    return [];
  }

  /**
   * {@inheritdoc}
   */
  public function advancedRender(ResultRow $values) {

    // Clean up values from previous render calls.
    if ($this->lastRenderIndex != $values->index) {
      $this->last_render_text = '';
    }
    if ($this
      ->allowAdvancedRender() && $this instanceof MultiItemsFieldHandlerInterface) {
      $raw_items = $this
        ->getItems($values);

      // If there are no items, set the original value to NULL.
      if (empty($raw_items)) {
        $this->original_value = NULL;
      }
    }
    else {
      $value = $this
        ->render($values);
      if (is_array($value)) {
        $value = $this
          ->getRenderer()
          ->render($value);
      }
      $this->last_render = $value;
      $this->original_value = $value;
    }
    if ($this
      ->allowAdvancedRender()) {
      if ($this instanceof MultiItemsFieldHandlerInterface) {
        $items = [];
        foreach ($raw_items as $count => $item) {
          $value = $this
            ->render_item($count, $item);
          if (is_array($value)) {
            $value = (string) $this
              ->getRenderer()
              ->render($value);
          }
          $this->last_render = $value;
          $this->original_value = $this->last_render;
          $alter = $item + $this->options['alter'];
          $alter['phase'] = static::RENDER_TEXT_PHASE_SINGLE_ITEM;
          $items[] = $this
            ->renderText($alter);
        }
        $value = $this
          ->renderItems($items);
      }
      else {
        $alter = [
          'phase' => static::RENDER_TEXT_PHASE_COMPLETELY,
        ] + $this->options['alter'];
        $value = $this
          ->renderText($alter);
      }
      if (is_array($value)) {
        $value = $this
          ->getRenderer()
          ->render($value);
      }

      // This happens here so that renderAsLink can get the unaltered value of
      // this field as a token rather than the altered value.
      $this->last_render = $value;
    }

    // String cast is necessary to test emptiness of MarkupInterface
    // objects.
    if (empty((string) $this->last_render)) {
      if ($this
        ->isValueEmpty($this->last_render, $this->options['empty_zero'], FALSE)) {
        $alter = $this->options['alter'];
        $alter['alter_text'] = 1;
        $alter['text'] = $this->options['empty'];
        $alter['phase'] = static::RENDER_TEXT_PHASE_EMPTY;
        $this->last_render = $this
          ->renderText($alter);
      }
    }

    // If we rendered something, update the last render index.
    if ((string) $this->last_render !== '') {
      $this->lastRenderIndex = $values->index;
    }
    return $this->last_render;
  }

  /**
   * {@inheritdoc}
   */
  public function isValueEmpty($value, $empty_zero, $no_skip_empty = TRUE) {

    // Convert MarkupInterface to a string for checking.
    if ($value instanceof MarkupInterface) {
      $value = (string) $value;
    }
    if (!isset($value)) {
      $empty = TRUE;
    }
    else {
      $empty = $empty_zero || $value !== 0 && $value !== '0';
    }
    if ($no_skip_empty) {
      $empty = empty($value) && $empty;
    }
    return $empty;
  }

  /**
   * {@inheritdoc}
   */
  public function renderText($alter) {

    // We need to preserve the safeness of the value regardless of the
    // alterations made by this method. Any alterations or replacements made
    // within this method need to ensure that at the minimum the result is
    // XSS admin filtered. See self::renderAltered() as an example that does.
    $value_is_safe = $this->last_render instanceof MarkupInterface;

    // Cast to a string so that empty checks and string functions work as
    // expected.
    $value = (string) $this->last_render;
    if (!empty($alter['alter_text']) && $alter['text'] !== '') {
      $tokens = $this
        ->getRenderTokens($alter);
      $value = $this
        ->renderAltered($alter, $tokens);

      // $alter['text'] is entered through the views admin UI and will be safe
      // because the output of $this->renderAltered() is run through
      // Xss::filterAdmin().
      // @see \Drupal\views\Plugin\views\PluginBase::viewsTokenReplace()
      // @see \Drupal\Component\Utility\Xss::filterAdmin()
      $value_is_safe = TRUE;
    }
    if (!empty($this->options['alter']['trim_whitespace'])) {
      $value = trim($value);
    }

    // Check if there should be no further rewrite for empty values.
    $no_rewrite_for_empty = $this->options['hide_alter_empty'] && $this
      ->isValueEmpty($this->original_value, $this->options['empty_zero']);

    // Check whether the value is empty and return nothing, so the field isn't rendered.
    // First check whether the field should be hidden if the value(hide_alter_empty = TRUE) /the rewrite is empty (hide_alter_empty = FALSE).
    // For numeric values you can specify whether "0"/0 should be empty.
    if (($this->options['hide_empty'] && empty($value) || $alter['phase'] != static::RENDER_TEXT_PHASE_EMPTY && $no_rewrite_for_empty) && $this
      ->isValueEmpty($value, $this->options['empty_zero'], FALSE)) {
      return '';
    }

    // Only in empty phase.
    if ($alter['phase'] == static::RENDER_TEXT_PHASE_EMPTY && $no_rewrite_for_empty) {

      // If we got here then $alter contains the value of "No results text"
      // and so there is nothing left to do.
      return ViewsRenderPipelineMarkup::create($value);
    }
    if (!empty($alter['strip_tags'])) {
      $value = strip_tags($value, $alter['preserve_tags']);
    }
    $more_link = '';
    if (!empty($alter['trim']) && !empty($alter['max_length'])) {
      $length = strlen($value);
      $value = $this
        ->renderTrimText($alter, $value);
      if ($this->options['alter']['more_link'] && strlen($value) < $length) {
        $tokens = $this
          ->getRenderTokens($alter);
        $more_link_text = $this->options['alter']['more_link_text'] ? $this->options['alter']['more_link_text'] : $this
          ->t('more');
        $more_link_text = strtr(Xss::filterAdmin($more_link_text), $tokens);
        $more_link_path = $this->options['alter']['more_link_path'];
        $more_link_path = strip_tags(Html::decodeEntities($this
          ->viewsTokenReplace($more_link_path, $tokens)));

        // Make sure that paths which were run through URL generation work as
        // well.
        $base_path = base_path();

        // Checks whether the path starts with the base_path.
        if (strpos($more_link_path, $base_path) === 0) {
          $more_link_path = mb_substr($more_link_path, mb_strlen($base_path));
        }

        // @todo Views should expect and store a leading /. See
        //   https://www.drupal.org/node/2423913.
        $options = [
          'attributes' => [
            'class' => [
              'views-more-link',
            ],
          ],
        ];
        if (UrlHelper::isExternal($more_link_path)) {
          $more_link_url = CoreUrl::fromUri($more_link_path, $options);
        }
        else {
          $more_link_url = CoreUrl::fromUserInput('/' . $more_link_path, $options);
        }
        $more_link = ' ' . $this
          ->linkGenerator()
          ->generate($more_link_text, $more_link_url);
      }
    }
    if (!empty($alter['nl2br'])) {
      $value = nl2br($value);
    }
    if ($value_is_safe) {
      $value = ViewsRenderPipelineMarkup::create($value);
    }
    $this->last_render_text = $value;
    if (!empty($alter['make_link']) && (!empty($alter['path']) || !empty($alter['url']))) {
      if (!isset($tokens)) {
        $tokens = $this
          ->getRenderTokens($alter);
      }
      $value = $this
        ->renderAsLink($alter, $value, $tokens);
    }

    // Preserve whether or not the string is safe. Since $more_link comes from
    // \Drupal::l(), it is safe to append. Check if the value is an instance of
    // \Drupal\Component\Render\MarkupInterface here because renderAsLink()
    // can return both safe and unsafe values.
    if ($value instanceof MarkupInterface) {
      return ViewsRenderPipelineMarkup::create($value . $more_link);
    }
    else {

      // If the string is not already marked safe, it is still OK to return it
      // because it will be sanitized by Twig.
      return $value . $more_link;
    }
  }

  /**
   * Render this field as user-defined altered text.
   */
  protected function renderAltered($alter, $tokens) {
    return $this
      ->viewsTokenReplace($alter['text'], $tokens);
  }

  /**
   * Trims the field down to the specified length.
   *
   * @param array $alter
   *   The alter array of options to use.
   *     - max_length: Maximum length of the string, the rest gets truncated.
   *     - word_boundary: Trim only on a word boundary.
   *     - ellipsis: Show an ellipsis (…) at the end of the trimmed string.
   *     - html: Make sure that the html is correct.
   * @param string $value
   *   The string which should be trimmed.
   *
   * @return string
   *   The rendered trimmed string.
   */
  protected function renderTrimText($alter, $value) {
    if (!empty($alter['strip_tags'])) {

      // NOTE: It's possible that some external fields might override the
      // element type.
      $this->definition['element type'] = 'span';
    }
    return static::trimText($alter, $value);
  }

  /**
   * Render this field as a link, with the info from a fieldset set by
   * the user.
   */
  protected function renderAsLink($alter, $text, $tokens) {
    $options = [
      'absolute' => !empty($alter['absolute']) ? TRUE : FALSE,
      'alias' => FALSE,
      'entity' => NULL,
      'entity_type' => NULL,
      'fragment' => NULL,
      'language' => NULL,
      'query' => [],
    ];
    $alter += [
      'path' => NULL,
    ];
    $path = $alter['path'];

    // strip_tags() and viewsTokenReplace remove <front>, so check whether it's
    // different to front.
    if ($path != '<front>') {

      // Use strip_tags as there should never be HTML in the path.
      // However, we need to preserve special characters like " that were
      // removed by Html::escape().
      $path = Html::decodeEntities($this
        ->viewsTokenReplace($alter['path'], $tokens));

      // Tokens might contain <front>, so check for <front> again.
      if ($path != '<front>') {
        $path = strip_tags($path);
      }

      // Tokens might have resolved URL's, as is the case for tokens provided by
      // Link fields, so all internal paths will be prefixed by base_path(). For
      // proper further handling reset this to internal:/.
      if (strpos($path, base_path()) === 0) {
        $path = 'internal:/' . substr($path, strlen(base_path()));
      }

      // If we have no $path and no $alter['url'], we have nothing to work with,
      // so we just return the text.
      if (empty($path) && empty($alter['url'])) {
        return $text;
      }

      // If no scheme is provided in the $path, assign the default 'http://'.
      // This allows a url of 'www.example.com' to be converted to
      // 'http://www.example.com'.
      // Only do this when flag for external has been set, $path doesn't contain
      // a scheme and $path doesn't have a leading /.
      if ($alter['external'] && !parse_url($path, PHP_URL_SCHEME) && strpos($path, '/') !== 0) {

        // There is no scheme, add the default 'http://' to the $path.
        $path = "http://" . $path;
      }
    }
    if (empty($alter['url'])) {
      if (!parse_url($path, PHP_URL_SCHEME)) {

        // @todo Views should expect and store a leading /. See
        //   https://www.drupal.org/node/2423913.
        $alter['url'] = CoreUrl::fromUserInput('/' . ltrim($path, '/'));
      }
      else {
        $alter['url'] = CoreUrl::fromUri($path);
      }
    }
    $options = $alter['url']
      ->getOptions() + $options;
    $path = $alter['url']
      ->setOptions($options)
      ->toUriString();
    if (!empty($alter['path_case']) && $alter['path_case'] != 'none' && !$alter['url']
      ->isRouted()) {
      $path = str_replace($alter['path'], $this
        ->caseTransform($alter['path'], $this->options['alter']['path_case']), $path);
    }
    if (!empty($alter['replace_spaces'])) {
      $path = str_replace(' ', '-', $path);
    }

    // Parse the URL and move any query and fragment parameters out of the path.
    $url = UrlHelper::parse($path);

    // Seriously malformed URLs may return FALSE or empty arrays.
    if (empty($url)) {
      return $text;
    }

    // If the path is empty do not build a link around the given text and return
    // it as is.
    // http://www.example.com URLs will not have a $url['path'], so check host as well.
    if (empty($url['path']) && empty($url['host']) && empty($url['fragment']) && empty($url['url'])) {
      return $text;
    }

    // If we get to here we have a path from the url parsing. So assign that to
    // $path now so we don't get query strings or fragments in the path.
    $path = $url['path'];
    if (isset($url['query'])) {

      // Remove query parameters that were assigned a query string replacement
      // token for which there is no value available.
      foreach ($url['query'] as $param => $val) {
        if ($val == '%' . $param) {
          unset($url['query'][$param]);
        }

        // Replace any empty query params from URL parsing with NULL. So the
        // query will get built correctly with only the param key.
        // @see \Drupal\Component\Utility\UrlHelper::buildQuery().
        if ($val === '') {
          $url['query'][$param] = NULL;
        }
      }
      $options['query'] = $url['query'];
    }
    if (isset($url['fragment'])) {
      $path = strtr($path, [
        '#' . $url['fragment'] => '',
      ]);

      // If the path is empty we want to have a fragment for the current site.
      if ($path == '') {
        $options['external'] = TRUE;
      }
      $options['fragment'] = $url['fragment'];
    }
    $alt = $this
      ->viewsTokenReplace($alter['alt'], $tokens);

    // Set the title attribute of the link only if it improves accessibility
    if ($alt && $alt != $text) {
      $options['attributes']['title'] = Html::decodeEntities($alt);
    }
    $class = $this
      ->viewsTokenReplace($alter['link_class'], $tokens);
    if ($class) {
      $options['attributes']['class'] = [
        $class,
      ];
    }
    if (!empty($alter['rel']) && ($rel = $this
      ->viewsTokenReplace($alter['rel'], $tokens))) {
      $options['attributes']['rel'] = $rel;
    }
    $target = trim($this
      ->viewsTokenReplace($alter['target'], $tokens));
    if (!empty($target)) {
      $options['attributes']['target'] = $target;
    }

    // Allow the addition of arbitrary attributes to links. Additional attributes
    // currently can only be altered in preprocessors and not within the UI.
    if (isset($alter['link_attributes']) && is_array($alter['link_attributes'])) {
      foreach ($alter['link_attributes'] as $key => $attribute) {
        if (!isset($options['attributes'][$key])) {
          $options['attributes'][$key] = $this
            ->viewsTokenReplace($attribute, $tokens);
        }
      }
    }

    // If the query and fragment were programmatically assigned overwrite any
    // parsed values.
    if (isset($alter['query'])) {

      // Convert the query to a string, perform token replacement, and then
      // convert back to an array form for
      // \Drupal\Core\Utility\LinkGeneratorInterface::generate().
      $options['query'] = UrlHelper::buildQuery($alter['query']);
      $options['query'] = $this
        ->viewsTokenReplace($options['query'], $tokens);
      $query = [];
      parse_str($options['query'], $query);
      $options['query'] = $query;
    }
    if (isset($alter['alias'])) {

      // Alias is a boolean field, so no token.
      $options['alias'] = $alter['alias'];
    }
    if (isset($alter['fragment'])) {
      $options['fragment'] = $this
        ->viewsTokenReplace($alter['fragment'], $tokens);
    }
    if (isset($alter['language'])) {
      $options['language'] = $alter['language'];
    }

    // If the url came from entity_uri(), pass along the required options.
    if (isset($alter['entity'])) {
      $options['entity'] = $alter['entity'];
    }
    if (isset($alter['entity_type'])) {
      $options['entity_type'] = $alter['entity_type'];
    }

    // The path has been heavily processed above, so it should be used as-is.
    $final_url = CoreUrl::fromUri($path, $options);

    // Build the link based on our altered Url object, adding on the optional
    // prefix and suffix
    $render = [
      '#type' => 'link',
      '#title' => $text,
      '#url' => $final_url,
    ];
    if (!empty($alter['prefix'])) {
      $render['#prefix'] = $this
        ->viewsTokenReplace($alter['prefix'], $tokens);
    }
    if (!empty($alter['suffix'])) {
      $render['#suffix'] = $this
        ->viewsTokenReplace($alter['suffix'], $tokens);
    }
    return $this
      ->getRenderer()
      ->render($render);
  }

  /**
   * {@inheritdoc}
   */
  public function getRenderTokens($item) {
    $tokens = [];
    if (!empty($this->view->build_info['substitutions'])) {
      $tokens = $this->view->build_info['substitutions'];
    }
    $count = 0;
    foreach ($this->displayHandler
      ->getHandlers('argument') as $arg => $handler) {
      $token = "{{ arguments.{$arg} }}";
      if (!isset($tokens[$token])) {
        $tokens[$token] = '';
      }

      // Use strip tags as there should never be HTML in the path.
      // However, we need to preserve special characters like " that
      // were removed by Html::escape().
      $tokens["{{ raw_arguments.{$arg} }}"] = isset($this->view->args[$count]) ? strip_tags(Html::decodeEntities($this->view->args[$count])) : '';
      $count++;
    }

    // Get flattened set of tokens for any array depth in query parameters.
    if ($request = $this->view
      ->getRequest()) {
      $tokens += $this
        ->getTokenValuesRecursive($request->query
        ->all());
    }

    // Now add replacements for our fields.
    foreach ($this->displayHandler
      ->getHandlers('field') as $field => $handler) {

      /** @var static $handler */
      $placeholder = $handler
        ->getFieldTokenPlaceholder();
      if (isset($handler->last_render)) {
        $tokens[$placeholder] = $handler->last_render;
      }
      else {
        $tokens[$placeholder] = '';
      }

      // We only use fields up to (and including) this one.
      if ($field == $this->options['id']) {
        break;
      }
    }

    // Store the tokens for the row so we can reference them later if necessary.
    $this->view->style_plugin->render_tokens[$this->view->row_index] = $tokens;
    $this->last_tokens = $tokens;
    if (!empty($item)) {
      $this
        ->addSelfTokens($tokens, $item);
    }
    return $tokens;
  }

  /**
   * Returns a token placeholder for the current field.
   *
   * @return string
   *   A token placeholder.
   */
  protected function getFieldTokenPlaceholder() {
    return '{{ ' . $this->options['id'] . ' }}';
  }

  /**
   * Recursive function to add replacements for nested query string parameters.
   *
   * E.g. if you pass in the following array:
   *   array(
   *     'foo' => array(
   *       'a' => 'value',
   *       'b' => 'value',
   *     ),
   *     'bar' => array(
   *       'a' => 'value',
   *       'b' => array(
   *         'c' => value,
   *       ),
   *     ),
   *   );
   *
   * Would yield the following array of tokens:
   *   array(
   *     '%foo_a' => 'value'
   *     '%foo_b' => 'value'
   *     '%bar_a' => 'value'
   *     '%bar_b_c' => 'value'
   *   );
   *
   * @param $array
   *   An array of values.
   * @param $parent_keys
   *   An array of parent keys. This will represent the array depth.
   *
   * @return
   *   An array of available tokens, with nested keys representative of the array structure.
   */
  protected function getTokenValuesRecursive(array $array, array $parent_keys = []) {
    $tokens = [];
    foreach ($array as $param => $val) {
      if (is_array($val)) {

        // Copy parent_keys array, so we don't affect other elements of this
        // iteration.
        $child_parent_keys = $parent_keys;
        $child_parent_keys[] = $param;

        // Get the child tokens.
        $child_tokens = $this
          ->getTokenValuesRecursive($val, $child_parent_keys);

        // Add them to the current tokens array.
        $tokens += $child_tokens;
      }
      else {

        // Create a token key based on array element structure.
        $token_string = !empty($parent_keys) ? implode('.', $parent_keys) . '.' . $param : $param;
        $tokens['{{ arguments.' . $token_string . ' }}'] = strip_tags(Html::decodeEntities($val));
      }
    }
    return $tokens;
  }

  /**
   * Add any special tokens this field might use for itself.
   *
   * This method is intended to be overridden by items that generate
   * fields as a list. For example, the field that displays all terms
   * on a node might have tokens for the tid and the term.
   *
   * By convention, tokens should follow the format of {{ token__subtoken }}
   * where token is the field ID and subtoken is the field. If the
   * field ID is terms, then the tokens might be {{ terms__tid }} and
   * {{ terms__name }}.
   */
  protected function addSelfTokens(&$tokens, $item) {
  }

  /**
   * Document any special tokens this field might use for itself.
   *
   * @see addSelfTokens()
   */
  protected function documentSelfTokens(&$tokens) {
  }

  /**
   * {@inheritdoc}
   */
  public function theme(ResultRow $values) {
    $renderer = $this
      ->getRenderer();
    $build = [
      '#theme' => $this
        ->themeFunctions(),
      '#view' => $this->view,
      '#field' => $this,
      '#row' => $values,
    ];
    $output = $renderer
      ->render($build);

    // Set the bubbleable rendering metadata on $view->element. This ensures the
    // bubbleable rendering metadata of individual rendered fields is not lost.
    // @see \Drupal\Core\Render\Renderer::updateStack()
    $this->view->element = $renderer
      ->mergeBubbleableMetadata($this->view->element, $build);
    return $output;
  }
  public function themeFunctions() {
    $themes = [];
    $hook = 'views_view_field';
    $display = $this->view->display_handler->display;
    if (!empty($display)) {
      $themes[] = $hook . '__' . $this->view->storage
        ->id() . '__' . $display['id'] . '__' . $this->options['id'];
      $themes[] = $hook . '__' . $this->view->storage
        ->id() . '__' . $display['id'];
      $themes[] = $hook . '__' . $display['id'] . '__' . $this->options['id'];
      $themes[] = $hook . '__' . $display['id'];
      if ($display['id'] != $display['display_plugin']) {
        $themes[] = $hook . '__' . $this->view->storage
          ->id() . '__' . $display['display_plugin'] . '__' . $this->options['id'];
        $themes[] = $hook . '__' . $this->view->storage
          ->id() . '__' . $display['display_plugin'];
        $themes[] = $hook . '__' . $display['display_plugin'] . '__' . $this->options['id'];
        $themes[] = $hook . '__' . $display['display_plugin'];
      }
    }
    $themes[] = $hook . '__' . $this->view->storage
      ->id() . '__' . $this->options['id'];
    $themes[] = $hook . '__' . $this->view->storage
      ->id();
    $themes[] = $hook . '__' . $this->options['id'];
    $themes[] = $hook;
    return $themes;
  }
  public function adminLabel($short = FALSE) {
    return $this
      ->getField(parent::adminLabel($short));
  }

  /**
   * Trims the field down to the specified length.
   *
   * @param array $alter
   *   The alter array of options to use.
   *     - max_length: Maximum length of the string, the rest gets truncated.
   *     - word_boundary: Trim only on a word boundary.
   *     - ellipsis: Show an ellipsis (…) at the end of the trimmed string.
   *     - html: Make sure that the html is correct.
   * @param string $value
   *   The string which should be trimmed.
   *
   * @return string
   *   The trimmed string.
   */
  public static function trimText($alter, $value) {
    if (mb_strlen($value) > $alter['max_length']) {
      $value = mb_substr($value, 0, $alter['max_length']);
      if (!empty($alter['word_boundary'])) {
        $regex = "(.*)\\b.+";
        if (function_exists('mb_ereg')) {
          mb_regex_encoding('UTF-8');
          $found = mb_ereg($regex, $value, $matches);
        }
        else {
          $found = preg_match("/{$regex}/us", $value, $matches);
        }
        if ($found) {
          $value = $matches[1];
        }
      }

      // Remove scraps of HTML entities from the end of a strings
      $value = rtrim(preg_replace('/(?:<(?!.+>)|&(?!.+;)).*$/us', '', $value));
      if (!empty($alter['ellipsis'])) {
        $value .= t('…');
      }
    }
    if (!empty($alter['html'])) {
      $value = Html::normalize($value);
    }
    return $value;
  }

  /**
   * Gets the link generator.
   *
   * @return \Drupal\Core\Utility\LinkGeneratorInterface
   */
  protected function linkGenerator() {
    if (!isset($this->linkGenerator)) {
      $this->linkGenerator = \Drupal::linkGenerator();
    }
    return $this->linkGenerator;
  }

  /**
   * Returns the render API renderer.
   *
   * @return \Drupal\Core\Render\RendererInterface
   */
  protected function getRenderer() {
    if (!isset($this->renderer)) {
      $this->renderer = \Drupal::service('renderer');
    }
    return $this->renderer;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property
DependencySerializationTrait::$_serviceIds	protected	property
DependencySerializationTrait::__sleep	public	function		2
DependencySerializationTrait::__wakeup	public	function		2
FieldPluginBase::$additional_fields	public	property	Stores additional fields which get added to the query.
FieldPluginBase::$aliases	public	property
FieldPluginBase::$field_alias	public	property
FieldPluginBase::$lastRenderIndex	protected	property	Keeps track of the last render index.
FieldPluginBase::$linkGenerator	protected	property	The link generator.
FieldPluginBase::$original_value	public	property	The field value prior to any rewriting.
FieldPluginBase::$renderer	protected	property	Stores the render API renderer. Overrides PluginBase::$renderer	1
FieldPluginBase::addAdditionalFields	protected	function	Add 'additional' fields to the query.
FieldPluginBase::addSelfTokens	protected	function	Add any special tokens this field might use for itself.	4
FieldPluginBase::adminLabel	public	function	Return a string representing this handler's name in the UI. Overrides HandlerBase::adminLabel
FieldPluginBase::adminSummary	public	function	Provide extra data to the administration form. Overrides HandlerBase::adminSummary
FieldPluginBase::advancedRender	public	function	Renders a field using advanced settings. Overrides FieldHandlerInterface::advancedRender
FieldPluginBase::allowAdvancedRender	protected	function	Determine if this field can allow advanced rendering.
FieldPluginBase::buildOptionsForm	public	function	Default options form that provides the label widget that all fields should have. Overrides HandlerBase::buildOptionsForm	25
FieldPluginBase::clickSort	public	function	Adds an ORDER BY clause to the query for click sort columns. Overrides FieldHandlerInterface::clickSort	1
FieldPluginBase::clickSortable	public	function	Determines if this field is click sortable. Overrides FieldHandlerInterface::clickSortable	5
FieldPluginBase::defineOptions	protected	function	Information about options for all kinds of purposes will be held here. Overrides HandlerBase::defineOptions	26
FieldPluginBase::documentSelfTokens	protected	function	Document any special tokens this field might use for itself.	3
FieldPluginBase::elementClasses	public	function	Returns the class of the field. Overrides FieldHandlerInterface::elementClasses
FieldPluginBase::elementLabelClasses	public	function	Returns the class of the field's label. Overrides FieldHandlerInterface::elementLabelClasses
FieldPluginBase::elementLabelType	public	function	Returns an HTML element for the label based upon the field's element type. Overrides FieldHandlerInterface::elementLabelType
FieldPluginBase::elementType	public	function	Returns an HTML element based upon the field's element type. Overrides FieldHandlerInterface::elementType	1
FieldPluginBase::elementWrapperClasses	public	function	Returns the class of the field's wrapper. Overrides FieldHandlerInterface::elementWrapperClasses
FieldPluginBase::elementWrapperType	public	function	Returns an HTML element for the wrapper based upon the field's element type. Overrides FieldHandlerInterface::elementWrapperType
FieldPluginBase::getElements	public	function	Provides a list of elements valid for field HTML. Overrides FieldHandlerInterface::getElements
FieldPluginBase::getEntity	public	function	Gets the entity matching the current row and relationship. Overrides FieldHandlerInterface::getEntity
FieldPluginBase::getFieldTokenPlaceholder	protected	function	Returns a token placeholder for the current field.
FieldPluginBase::getPreviousFieldLabels	protected	function	Returns all field labels of fields before this field.
FieldPluginBase::getRenderer	protected	function	Returns the render API renderer. Overrides PluginBase::getRenderer
FieldPluginBase::getRenderTokens	public	function	Gets the 'render' tokens to use for advanced rendering. Overrides FieldHandlerInterface::getRenderTokens
FieldPluginBase::getTokenValuesRecursive	protected	function	Recursive function to add replacements for nested query string parameters.
FieldPluginBase::getValue	public	function	Gets the value that's supposed to be rendered. Overrides FieldHandlerInterface::getValue	2
FieldPluginBase::init	public	function	Initialize the plugin. Overrides HandlerBase::init	13
FieldPluginBase::isValueEmpty	public	function	Checks if a field value is empty. Overrides FieldHandlerInterface::isValueEmpty
FieldPluginBase::label	public	function	Gets this field's label. Overrides FieldHandlerInterface::label
FieldPluginBase::linkGenerator	protected	function	Gets the link generator.
FieldPluginBase::postRender	public	function	Runs after every field has been rendered. Overrides FieldHandlerInterface::postRender
FieldPluginBase::preRender	public	function	Runs before any fields are rendered. Overrides FieldHandlerInterface::preRender	10
FieldPluginBase::query	public	function	Called to add the field to a query. Overrides HandlerBase::query	19
FieldPluginBase::render	public	function	Renders the field. Overrides FieldHandlerInterface::render	26
FieldPluginBase::renderAltered	protected	function	Render this field as user-defined altered text.
FieldPluginBase::renderAsLink	protected	function	Render this field as a link, with the info from a fieldset set by the user.
FieldPluginBase::renderText	public	function	Performs an advanced text render for the item. Overrides FieldHandlerInterface::renderText
FieldPluginBase::renderTrimText	protected	function	Trims the field down to the specified length.
FieldPluginBase::RENDER_TEXT_PHASE_COMPLETELY		constant	Indicator of the renderText() method for rendering the whole element. (if no render_item() method is available).
FieldPluginBase::RENDER_TEXT_PHASE_EMPTY		constant	Indicator of the renderText() method for rendering the empty text.
FieldPluginBase::RENDER_TEXT_PHASE_SINGLE_ITEM		constant	Indicator of the renderText() method for rendering a single item. (If no render_item() is present).
FieldPluginBase::submitOptionsForm	public	function	Performs some cleanup tasks on the options array before saving it. Overrides PluginBase::submitOptionsForm	1
FieldPluginBase::theme	public	function	Passes values to drupal_render() using $this->themeFunctions() as #theme. Overrides FieldHandlerInterface::theme
FieldPluginBase::themeFunctions	public	function	Provide a full list of possible theme templates used by this style. Overrides PluginBase::themeFunctions
FieldPluginBase::tokenizeValue	public	function	Replaces a value with tokens from the last field. Overrides FieldHandlerInterface::tokenizeValue
FieldPluginBase::trimText	public static	function	Trims the field down to the specified length.
FieldPluginBase::useStringGroupBy	public	function	Determines if this field will be available as an option to group the result by in the style settings. Overrides FieldHandlerInterface::useStringGroupBy
HandlerBase::$field	public	property	With field you can override the realField if the real field is not set.
HandlerBase::$moduleHandler	protected	property	The module handler.	3
HandlerBase::$query	public	property	Where the $query object will reside.	7
HandlerBase::$realField	public	property	The actual field in the database table, maybe different on other kind of query plugins/special handlers.
HandlerBase::$relationship	public	property	The relationship used for this field.
HandlerBase::$table	public	property	The table this handler is attached to.
HandlerBase::$tableAlias	public	property	The alias of the table of this handler which is used in the query.
HandlerBase::$viewsData	protected	property	The views data service.
HandlerBase::acceptExposedInput	public	function	Take input from exposed handlers and assign to this handler, if necessary.	1
HandlerBase::access	public	function	Check whether given user has access to this handler. Overrides ViewsHandlerInterface::access	4
HandlerBase::breakString	public static	function	Breaks x,y,z and x+y+z into an array. Overrides ViewsHandlerInterface::breakString
HandlerBase::broken	public	function	Determines if the handler is considered 'broken', meaning it's a placeholder used when a handler can't be found. Overrides ViewsHandlerInterface::broken
HandlerBase::buildExposedForm	public	function	Render our chunk of the exposed handler form when selecting.	1
HandlerBase::buildExposeForm	public	function	Form for exposed handler options.	2
HandlerBase::buildExtraOptionsForm	public	function	Provide a form for setting options.	1
HandlerBase::buildGroupByForm	public	function	Provide a form for aggregation settings.	1
HandlerBase::calculateDependencies	public	function	Calculates dependencies for the configured plugin. Overrides PluginBase::calculateDependencies	10
HandlerBase::canExpose	public	function	Determine if a handler can be exposed.	2
HandlerBase::caseTransform	protected	function	Transform a string by a certain method.
HandlerBase::defaultExposeOptions	public	function	Set new exposed option defaults when exposed setting is flipped on.	2
HandlerBase::defineExtraOptions	public	function	Provide defaults for the handler.
HandlerBase::displayExposedForm	public	function	Displays the Expose form.
HandlerBase::ensureMyTable	public	function	Ensure the main table for this handler is in the query. This is used a lot. Overrides ViewsHandlerInterface::ensureMyTable	2
HandlerBase::exposedInfo	public	function	Get information about the exposed form for the form renderer.	1
HandlerBase::getDateField	public	function	Creates cross-database SQL dates.	2
HandlerBase::getDateFormat	public	function	Creates cross-database SQL date formatting.	2
HandlerBase::getEntityType	public	function	Determines the entity type used by this handler. Overrides ViewsHandlerInterface::getEntityType
HandlerBase::getField	public	function	Shortcut to get a handler's raw field value. Overrides ViewsHandlerInterface::getField
HandlerBase::getJoin	public	function	Get the join object that should be used for this handler. Overrides ViewsHandlerInterface::getJoin
HandlerBase::getModuleHandler	protected	function	Gets the module handler.
HandlerBase::getTableJoin	public static	function	Fetches a handler to join one table to a primary table from the data cache. Overrides ViewsHandlerInterface::getTableJoin
HandlerBase::getViewsData	protected	function	Gets views data service.
HandlerBase::hasExtraOptions	public	function	If a handler has 'extra options' it will get a little settings widget and another form called extra_options.	1
HandlerBase::isAGroup	public	function	Returns TRUE if the exposed filter works like a grouped filter.	1
HandlerBase::isExposed	public	function	Determine if this item is 'exposed', meaning it provides form elements to let users modify the view.
HandlerBase::multipleExposedInput	public	function	Define if the exposed input has to be submitted multiple times. This is TRUE when exposed filters grouped are using checkboxes as widgets.	1
HandlerBase::placeholder	protected	function	Provides a unique placeholders for handlers.
HandlerBase::postExecute	public	function	Run after the view is executed, before the result is cached. Overrides ViewsHandlerInterface::postExecute
HandlerBase::preQuery	public	function	Run before the view is built. Overrides ViewsHandlerInterface::preQuery	2
HandlerBase::sanitizeValue	public	function	Sanitize the value for output. Overrides ViewsHandlerInterface::sanitizeValue
HandlerBase::setModuleHandler	public	function	Sets the module handler.
HandlerBase::setRelationship	public	function	Called just prior to query(), this lets a handler set up any relationship it needs. Overrides ViewsHandlerInterface::setRelationship
HandlerBase::setViewsData	public	function
HandlerBase::showExposeButton	public	function	Shortcut to display the expose/hide button.	2
HandlerBase::showExposeForm	public	function	Shortcut to display the exposed options form. Overrides ViewsHandlerInterface::showExposeForm
HandlerBase::storeExposedInput	public	function	If set to remember exposed input in the session, store it there.	1
HandlerBase::submitExposed	public	function	Submit the exposed handler form.
HandlerBase::submitExposeForm	public	function	Perform any necessary changes to the form exposes prior to storage. There is no need for this function to actually store the data.
HandlerBase::submitExtraOptionsForm	public	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.
HandlerBase::submitFormCalculateOptions	public	function	Calculates options stored on the handler.	1
HandlerBase::submitGroupByForm	public	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.	1
HandlerBase::submitTemporaryForm	public	function	A submit handler that is used for storing temporary items when using multi-step changes, such as ajax requests.
HandlerBase::usesGroupBy	public	function	Provides the handler some groupby.	13
HandlerBase::validate	public	function	Validate that the plugin is correct and can be saved. Overrides PluginBase::validate	2
HandlerBase::validateExposed	public	function	Validate the exposed handler form.	4
HandlerBase::validateExposeForm	public	function	Validate the options form.	2
HandlerBase::validateExtraOptionsForm	public	function	Validate the options form.
HandlerBase::__construct	public	function	Constructs a Handler object. Overrides PluginBase::__construct	45
MessengerTrait::$messenger	protected	property	The messenger.	27
MessengerTrait::messenger	public	function	Gets the messenger.	27
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$definition	public	property	Plugins's definition.
PluginBase::$displayHandler	public	property	The display object this plugin is for.
PluginBase::$options	public	property	Options for this plugin will be held here.
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::$usesOptions	protected	property	Denotes whether the plugin has an additional options form.	8
PluginBase::$view	public	property	The top object of a view.	1
PluginBase::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create	63
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::destroy	public	function	Clears a plugin. Overrides ViewsPluginInterface::destroy	2
PluginBase::doFilterByDefinedOptions	protected	function	Do the work to filter out stored options depending on the defined options.
PluginBase::filterByDefinedOptions	public	function	Filter out stored options depending on the defined options. Overrides ViewsPluginInterface::filterByDefinedOptions
PluginBase::getAvailableGlobalTokens	public	function	Returns an array of available token replacements. Overrides ViewsPluginInterface::getAvailableGlobalTokens
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	2
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::getProvider	public	function	Returns the plugin provider. Overrides ViewsPluginInterface::getProvider
PluginBase::globalTokenForm	public	function	Adds elements for available core tokens to a form. Overrides ViewsPluginInterface::globalTokenForm
PluginBase::globalTokenReplace	public	function	Returns a string with any core tokens replaced. Overrides ViewsPluginInterface::globalTokenReplace
PluginBase::INCLUDE_ENTITY		constant	Include entity row languages when listing languages.
PluginBase::INCLUDE_NEGOTIATED		constant	Include negotiated languages when listing languages.
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::listLanguages	protected	function	Makes an array of languages, optionally including special languages.
PluginBase::pluginTitle	public	function	Return the human readable name of the display. Overrides ViewsPluginInterface::pluginTitle
PluginBase::preRenderAddFieldsetMarkup	public static	function	Moves form elements into fieldsets for presentation purposes. Overrides ViewsPluginInterface::preRenderAddFieldsetMarkup
PluginBase::preRenderFlattenData	public static	function	Flattens the structure of form elements. Overrides ViewsPluginInterface::preRenderFlattenData
PluginBase::queryLanguageSubstitutions	public static	function	Returns substitutions for Views queries for languages.
PluginBase::setOptionDefaults	protected	function	Fills up the options of the plugin with defaults.
PluginBase::summaryTitle	public	function	Returns the summary of the settings in the display. Overrides ViewsPluginInterface::summaryTitle	6
PluginBase::trustedCallbacks	public static	function	Lists the trusted callbacks provided by the implementing class. Overrides TrustedCallbackInterface::trustedCallbacks	6
PluginBase::unpackOptions	public	function	Unpack options over our existing defaults, drilling down into arrays so that defaults don't get totally blown away. Overrides ViewsPluginInterface::unpackOptions
PluginBase::usesOptions	public	function	Returns the usesOptions property. Overrides ViewsPluginInterface::usesOptions	8
PluginBase::validateOptionsForm	public	function	Validate the options form. Overrides ViewsPluginInterface::validateOptionsForm	15
PluginBase::viewsTokenReplace	protected	function	Replaces Views' tokens in a given string. The resulting string will be sanitized with Xss::filterAdmin.	1
PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT		constant	Query string to indicate the site default language.
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	4
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.
TrustedCallbackInterface::THROW_EXCEPTION		constant	Untrusted callbacks throw exceptions.
TrustedCallbackInterface::TRIGGER_SILENCED_DEPRECATION		constant	Untrusted callbacks trigger silenced E_USER_DEPRECATION errors.
TrustedCallbackInterface::TRIGGER_WARNING		constant	Untrusted callbacks trigger E_USER_WARNING errors.