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class ViewsForm in Drupal 8

Same name and namespace in other branches
  1. 9 core/modules/views/src/Form/ViewsForm.php \Drupal\views\Form\ViewsForm

Provides a base class for single- or multistep view forms.

This class only dispatches logic to the form for the current step. The form is always assumed to be multistep, even if it has only one step (which by default is \Drupal\views\Form\ViewsFormMainForm). That way it is actually possible for modules to have a multistep form if they need to.

Hierarchy

Expanded class hierarchy of ViewsForm

3 files declare their use of ViewsForm
classy.theme in core/themes/classy/classy.theme
Functions to support theming in the Classy theme.
DisplayPluginBase.php in core/modules/views/src/Plugin/views/display/DisplayPluginBase.php
seven.theme in core/themes/seven/seven.theme
Functions to support theming in the Seven theme.

File

core/modules/views/src/Form/ViewsForm.php, line 25

Namespace

Drupal\views\Form
View source
class ViewsForm implements FormInterface, ContainerInjectionInterface {
  use DependencySerializationTrait;

  /**
   * The class resolver to get the subform form objects.
   *
   * @var \Drupal\Core\DependencyInjection\ClassResolverInterface
   */
  protected $classResolver;

  /**
   * The request stack.
   *
   * @var \Symfony\Component\HttpFoundation\RequestStack
   */
  protected $requestStack;

  /**
   * The url generator to generate the form action.
   *
   * @var \Drupal\Core\Routing\UrlGeneratorInterface
   */
  protected $urlGenerator;

  /**
   * The ID of the view.
   *
   * @var string
   */
  protected $viewId;

  /**
   * The ID of the active view's display.
   *
   * @var string
   */
  protected $viewDisplayId;

  /**
   * The arguments passed to the active view.
   *
   * @var string[]
   */
  protected $viewArguments;

  /**
   * Constructs a ViewsForm object.
   *
   * @param \Drupal\Core\DependencyInjection\ClassResolverInterface $class_resolver
   *   The class resolver to get the subform form objects.
   * @param \Drupal\Core\Routing\UrlGeneratorInterface $url_generator
   *   The url generator to generate the form action.
   * @param \Symfony\Component\HttpFoundation\RequestStack $requestStack
   *   The request stack.
   * @param string $view_id
   *   The ID of the view.
   * @param string $view_display_id
   *   The ID of the active view's display.
   * @param string[] $view_args
   *   The arguments passed to the active view.
   */
  public function __construct(ClassResolverInterface $class_resolver, UrlGeneratorInterface $url_generator, RequestStack $requestStack, $view_id, $view_display_id, array $view_args) {
    $this->classResolver = $class_resolver;
    $this->urlGenerator = $url_generator;
    $this->requestStack = $requestStack;
    $this->viewId = $view_id;
    $this->viewDisplayId = $view_display_id;
    $this->viewArguments = $view_args;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, $view_id = NULL, $view_display_id = NULL, array $view_args = NULL) {
    return new static($container
      ->get('class_resolver'), $container
      ->get('url_generator'), $container
      ->get('request_stack'), $view_id, $view_display_id, $view_args);
  }

  /**
   * Returns a string for the form's base ID.
   *
   * @return string
   *   The string identifying the form's base ID.
   */
  public function getBaseFormId() {
    $parts = [
      'views_form',
      $this->viewId,
      $this->viewDisplayId,
    ];
    return implode('_', $parts);
  }

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    $parts = [
      $this
        ->getBaseFormId(),
    ];
    if (!empty($this->viewArguments)) {

      // Append the passed arguments to ensure form uniqueness.
      $parts = array_merge($parts, $this->viewArguments);
    }
    return implode('_', $parts);
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state, ViewExecutable $view = NULL, $output = []) {
    if (!($step = $form_state
      ->get('step'))) {
      $step = 'views_form_views_form';
      $form_state
        ->set('step', $step);
    }
    $form_state
      ->set([
      'step_controller',
      'views_form_views_form',
    ], 'Drupal\\views\\Form\\ViewsFormMainForm');

    // Add the base form ID.
    $form_state
      ->addBuildInfo('base_form_id', $this
      ->getBaseFormId());
    $form = [];
    $query = $this->requestStack
      ->getCurrentRequest()->query
      ->all();
    $query = UrlHelper::filterQueryParameters($query, [], '');
    $options = [
      'query' => $query,
    ];
    $form['#action'] = $view
      ->hasUrl() ? $view
      ->getUrl()
      ->setOptions($options)
      ->toString() : Url::fromRoute('<current>')
      ->setOptions($options)
      ->toString();

    // Tell the preprocessor whether it should hide the header, footer, pager,
    // etc.
    $form['show_view_elements'] = [
      '#type' => 'value',
      '#value' => $step == 'views_form_views_form' ? TRUE : FALSE,
    ];
    $form_object = $this
      ->getFormObject($form_state);
    $form += $form_object
      ->buildForm($form, $form_state, $view, $output);
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
    $form_object = $this
      ->getFormObject($form_state);
    $form_object
      ->validateForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $form_object = $this
      ->getFormObject($form_state);
    $form_object
      ->submitForm($form, $form_state);
  }

  /**
   * Returns the object used to build the step form.
   *
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The form_state of the current form.
   *
   * @return \Drupal\Core\Form\FormInterface
   *   The form object to use.
   */
  protected function getFormObject(FormStateInterface $form_state) {

    // If this is a class, instantiate it.
    $form_step_class = $form_state
      ->get([
      'step_controller',
      $form_state
        ->get('step'),
    ]) ?: 'Drupal\\views\\Form\\ViewsFormMainForm';
    return $this->classResolver
      ->getInstanceFromDefinition($form_step_class);
  }

}

Members

Namesort descending Modifiers Type Description Overrides
DependencySerializationTrait::$_entityStorages protected property An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
ViewsForm::$classResolver protected property The class resolver to get the subform form objects.
ViewsForm::$requestStack protected property The request stack.
ViewsForm::$urlGenerator protected property The url generator to generate the form action.
ViewsForm::$viewArguments protected property The arguments passed to the active view.
ViewsForm::$viewDisplayId protected property The ID of the active view's display.
ViewsForm::$viewId protected property The ID of the view.
ViewsForm::buildForm public function Form constructor. Overrides FormInterface::buildForm
ViewsForm::create public static function Instantiates a new instance of this class. Overrides ContainerInjectionInterface::create
ViewsForm::getBaseFormId public function Returns a string for the form's base ID.
ViewsForm::getFormId public function Returns a unique string identifying the form. Overrides FormInterface::getFormId
ViewsForm::getFormObject protected function Returns the object used to build the step form.
ViewsForm::submitForm public function Form submission handler. Overrides FormInterface::submitForm
ViewsForm::validateForm public function Form validation handler. Overrides FormInterface::validateForm
ViewsForm::__construct public function Constructs a ViewsForm object.