ViewsFormInterface.php

<?php

namespace Drupal\views_ui\Form\Ajax;

use Drupal\Core\Form\FormInterface;
use Drupal\views\ViewEntityInterface;
interface ViewsFormInterface extends FormInterface {
    
    /**
     * Returns the key that represents this form.
     *
     * @return string
     *   The form key used in the URL, e.g., the string 'add-handler' in
     *   'admin/structure/views/%/add-handler/%/%/%'.
     */
    public function getFormKey();
    
    /**
     * Gets the form state for this form.
     *
     * @param \Drupal\views\ViewEntityInterface $view
     *   The view being edited.
     * @param string|null $display_id
     *   The display ID being edited, or NULL to load the first available display.
     * @param string $js
     *   If this is an AJAX form, it will be the string 'ajax'. Otherwise, it will
     *   be 'nojs'. This determines the response.
     *
     * @return \Drupal\Core\Form\FormStateInterface
     *   The current state of the form.
     */
    public function getFormState(ViewEntityInterface $view, $display_id, $js);
    
    /**
     * Creates a new instance of this form.
     *
     * @param \Drupal\views\ViewEntityInterface $view
     *   The view being edited.
     * @param string|null $display_id
     *   The display ID being edited, or NULL to load the first available display.
     * @param string $js
     *   If this is an AJAX form, it will be the string 'ajax'. Otherwise, it will
     *   be 'nojs'. This determines the response.
     *
     * @return array
     *   A form for a specific operation in the Views UI, or an array of AJAX
     *   commands to render a form.
     *
     * @todo When https://www.drupal.org/node/1843224 is in, this will return
     *   \Drupal\Core\Ajax\AjaxResponse instead of the array of AJAX commands.
     */
    public function getForm(ViewEntityInterface $view, $display_id, $js);

}