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<?php
namespace Drupal\Core\Plugin;
use Drupal\Core\Form\FormStateInterface;
/**
* Provides an interface for an embeddable plugin form.
*
* Plugins can implement this form directly, or a standalone class can be used.
* Decoupled forms can implement \Drupal\Component\Plugin\PluginAwareInterface
* in order to gain access to the plugin.
*
* @ingroup plugin_api
*/
interface PluginFormInterface {
/**
* Form constructor.
*
* Plugin forms are embedded in other forms. In order to know where the plugin
* form is located in the parent form, #parents and #array_parents must be
* known, but these are not available during the initial build phase. In order
* to have these properties available when building the plugin form's
* elements, let this method return a form element that has a #process
* callback and build the rest of the form in the callback. By the time the
* callback is executed, the element's #parents and #array_parents properties
* will have been set by the form API. For more documentation on #parents and
* #array_parents, see \Drupal\Core\Render\Element\FormElement.
*
* @param array $form
* An associative array containing the initial structure of the plugin form.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form. Calling code should pass on a subform
* state created through
* \Drupal\Core\Form\SubformState::createForSubform().
*
* @return array
* The form structure.
*/
public function buildConfigurationForm(array $form, FormStateInterface $form_state);
/**
* Form validation handler.
*
* @param array $form
* An associative array containing the structure of the plugin form as built
* by static::buildConfigurationForm().
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form. Calling code should pass on a subform
* state created through
* \Drupal\Core\Form\SubformState::createForSubform().
*/
public function validateConfigurationForm(array &$form, FormStateInterface $form_state);
/**
* Form submission handler.
*
* @param array $form
* An associative array containing the structure of the plugin form as built
* by static::buildConfigurationForm().
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form. Calling code should pass on a subform
* state created through
* \Drupal\Core\Form\SubformState::createForSubform().
*/
public function submitConfigurationForm(array &$form, FormStateInterface $form_state);
}