class TokenizeAreaPluginBase

abstract class TokenizeAreaPluginBase extends AreaPluginBase {
    
    /**
     * {@inheritdoc}
     */
    protected function defineOptions() {
        $options = parent::defineOptions();
        $options['tokenize'] = [
            'default' => FALSE,
        ];
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildOptionsForm(&$form, FormStateInterface $form_state) {
        parent::buildOptionsForm($form, $form_state);
        // Add tokenization form elements.
        $this->tokenForm($form, $form_state);
    }
    
    /**
     * Adds tokenization form elements.
     */
    public function tokenForm(&$form, FormStateInterface $form_state) {
        $form['tokenize'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Use replacement tokens from the first row'),
            '#default_value' => $this->options['tokenize'],
        ];
        // Get a list of the available fields and arguments for token replacement.
        $options = [];
        $optgroup_arguments = (string) $this->t('Arguments');
        $optgroup_fields = (string) $this->t('Fields');
        foreach ($this->view->display_handler
            ->getHandlers('field') as $field => $handler) {
            $options[$optgroup_fields]["{{ {$field} }}"] = $handler->adminLabel();
        }
        foreach ($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' => $handler->adminLabel(),
            ]);
        }
        if (!empty($options)) {
            $form['tokens'] = [
                '#type' => 'details',
                '#title' => $this->t('Replacement patterns'),
                '#open' => TRUE,
                '#id' => 'edit-options-token-help',
                '#states' => [
                    'visible' => [
                        ':input[name="options[tokenize]"]' => [
                            'checked' => TRUE,
                        ],
                    ],
                ],
            ];
            $form['tokens']['help'] = [
                '#markup' => '<p>' . $this->t('The following tokens are available. You may use Twig syntax in this field.') . '</p>',
            ];
            foreach (array_keys($options) as $type) {
                if (!empty($options[$type])) {
                    $items = [];
                    foreach ($options[$type] as $key => $value) {
                        $items[] = $key . ' == ' . $value;
                    }
                    $form['tokens'][$type]['tokens'] = [
                        '#theme' => 'item_list',
                        '#items' => $items,
                    ];
                }
            }
            $form['tokens']['html_help'] = [
                '#markup' => '<p>' . $this->t('You may include the following allowed HTML tags with these "Replacement patterns": <code>@tags</code>', [
                    '@tags' => '<' . implode('> <', Xss::getAdminTagList()) . '>',
                ]) . '</p>',
            ];
        }
        $this->globalTokenForm($form, $form_state);
    }
    
    /**
     * Replaces value with special views tokens and global tokens.
     *
     * @param string $value
     *   The value to eventually tokenize.
     *
     * @return string
     *   Tokenized value if tokenize option is enabled. In any case global tokens
     *   will be replaced.
     */
    public function tokenizeValue($value) {
        // As we add the globalTokenForm() we also should replace the token here.
        $value = $this->globalTokenReplace($value);
        if ($this->options['tokenize']) {
            $value = $this->view
                ->getStyle()
                ->tokenizeValue($value, 0);
        }
        return $value;
    }

}