ActionEditFieldForm.php in Paragraphs table 8

Namespace

Drupal\paragraphs_table\Form

File

src/Form/ActionEditFieldForm.php

<?php

namespace Drupal\paragraphs_table\Form;

use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Entity\EntityChangedInterface;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Render\Element;
use Drupal\Core\Entity\Entity\EntityFormDisplay;
use Drupal\Core\Url;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Builds and process a form for editing a single entity field.
 *
 * @internal
 */
class ActionEditFieldForm extends FormBase {

  /**
   * The module handler.
   *
   * @var \Drupal\Core\Extension\ModuleHandlerInterface
   */
  protected $moduleHandler;

  /**
   * The node type storage.
   *
   * @var \Drupal\Core\Entity\EntityStorageInterface
   */
  protected $nodeTypeStorage;

  /**
   * Constructs a new EditFieldForm.
   *
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
   *   The module handler.
   * @param \Drupal\Core\Entity\EntityStorageInterface $node_type_storage
   *   The node type storage.
   */
  public function __construct(ModuleHandlerInterface $module_handler, EntityStorageInterface $node_type_storage) {
    $this->moduleHandler = $module_handler;
    $this->nodeTypeStorage = $node_type_storage;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('module_handler'), $container
      ->get('entity_type.manager')
      ->getStorage('node_type'));
  }

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'paragraphs_table_edit';
  }

  /**
   * {@inheritdoc}
   *
   * Builds a form for a single entity field.
   */
  public function buildForm(array $form, FormStateInterface $form_state, EntityInterface $entity = NULL, $field_name = NULL) {
    if (!$form_state
      ->has('entity')) {
      $this
        ->init($form_state, $entity, $field_name);
    }

    // Add the field form.
    $form_state
      ->get('form_display')
      ->buildForm($entity, $form, $form_state);

    // Add a dummy changed timestamp field to attach form errors to.
    if ($entity instanceof EntityChangedInterface) {
      $form['changed_field'] = [
        '#type' => 'hidden',
        '#value' => $entity
          ->getChangedTime(),
      ];
    }
    $form[$field_name]["widget"]["add_more"]["#access"] = FALSE;
    $form[$field_name]['actions']['submit'] = [
      '#type' => 'submit',
      '#value' => t('Save'),
    ];

    // Use the non-inline form error display for Quick Edit forms, because in
    // this case the errors are already near the form element.
    $form['#disable_inline_form_errors'] = TRUE;

    // Simplify it for optimal in-place use.
    $this
      ->simplify($form, $form_state);
    return $form;
  }

  /**
   * Initialize the form state and the entity before the first form build.
   */
  protected function init(FormStateInterface $form_state, EntityInterface $entity, $field_name) {
    if ($entity
      ->getEntityTypeId() == 'node') {
      $node_type = $this->nodeTypeStorage
        ->load($entity
        ->bundle());
      $entity
        ->setNewRevision($node_type
        ->shouldCreateNewRevision());
      $entity->revision_log = NULL;
    }
    $form_state
      ->set('entity', $entity);
    $form_state
      ->set('field_name', $field_name);
    $display = EntityFormDisplay::collectRenderDisplay($entity, 'default');
    foreach ($display
      ->getComponents() as $name => $options) {
      if ($name != $field_name) {
        $display
          ->removeComponent($name);
      }
    }
    $form_state
      ->set('form_display', $display);
  }

  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
    $entity = $this
      ->buildEntity($form, $form_state);
    $form_state
      ->get('form_display')
      ->validateFormValues($entity, $form, $form_state);
  }

  /**
   * {@inheritdoc}
   *
   * Saves the entity with updated values for the edited field.
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $entity = $this
      ->buildEntity($form, $form_state);
    $form_state
      ->set('entity', $entity);
    if ($entity
      ->getEntityType()
      ->hasKey('revision')) {
      $entity
        ->setNewRevision(FALSE);
    }
    $entity
      ->save();
    $form_state
      ->disableRedirect(FALSE);
    $form_state
      ->setRedirectUrl(Url::fromRoute('<current>'));
  }

  /**
   * Returns a cloned entity containing updated field values.
   *
   * Calling code may then validate the returned entity, and if valid, transfer
   * it back to the form state and save it.
   */
  protected function buildEntity(array $form, FormStateInterface $form_state) {

    /** @var \Drupal\Core\Entity\EntityInterface $entity */
    $entity = clone $form_state
      ->get('entity');
    $field_name = $form_state
      ->get('field_name');
    $form_state
      ->get('form_display')
      ->extractFormValues($entity, $form, $form_state);
    if ($entity
      ->getEntityTypeId() == 'node' && $entity
      ->isNewRevision() && $entity->revision_log
      ->isEmpty()) {
      $entity->revision_log = t('Updated the %field-name field through in-place editing.', [
        '%field-name' => $entity
          ->get($field_name)
          ->getFieldDefinition()
          ->getLabel(),
      ]);
    }
    return $entity;
  }

  /**
   * Simplifies the field edit form for in-place editing.
   *
   * This function:
   * - Hides the field label inside the form, because JavaScript displays it
   *   outside the form.
   * - Adjusts textarea elements to fit their content.
   *
   * @param array &$form
   *   A reference to an associative array containing the structure of the form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   */
  protected function simplify(array &$form, FormStateInterface $form_state) {
    $field_name = $form_state
      ->get('field_name');
    $widget_element =& $form[$field_name]['widget'];

    // Hide the field label from displaying within the form, because JavaScript
    // displays the equivalent label that was provided within an HTML data
    // attribute of the field's display element outside of the form. Do this for
    // widgets without child elements (like Option widgets) as well as for ones
    // with per-delta elements. Skip single checkboxes, because their title is
    // key to their UI. Also skip widgets with multiple subelements, because in
    // that case, per-element labeling is informative.
    $num_children = count(Element::children($widget_element));
    if ($num_children == 0 && $widget_element['#type'] != 'checkbox') {
      $widget_element['#title_display'] = 'invisible';
    }
    if ($num_children == 1 && isset($widget_element[0]['value'])) {

      // @todo While most widgets name their primary element 'value', not all
      //   do, so generalize this.
      $widget_element[0]['value']['#title_display'] = 'invisible';
    }

    // Adjust textarea elements to fit their content.
    if (isset($widget_element[0]['value']['#type']) && $widget_element[0]['value']['#type'] == 'textarea') {
      $lines = count(explode("\n", $widget_element[0]['value']['#default_value']));
      $widget_element[0]['value']['#rows'] = $lines + 1;
    }
  }

}

Classes

Name	Description
ActionEditFieldForm	Builds and process a form for editing a single entity field.