grapesjs_editor.module

<?php

/**
 * @file
 * Contains grapesjs_editor.module.
 */

use Drupal\block_content\BlockContentInterface;
use Drupal\Core\Entity\EntityFormInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\node\NodeInterface;

/**
 * Implements hook_help().
 */
function grapesjs_editor_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.grapesjs_editor':
      $output = '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('The GrapesJS Editor module provides a page builder.') . '</p>';
      return ['#markup' => $output];
  }
}

/**
 * Implements hook_element_info_alter().
 */
function grapesjs_editor_element_info_alter(array &$info) {
  if (!empty($info['text_format'])) {
    $info['text_format']['#process'][] = '_grapesjs_editor_text_format_processor';
  }
}

/**
 * Removes GrapesJS format if is disabled for this node type.
 *
 * @param array $element
 *   The render element.
 * @param \Drupal\Core\Form\FormStateInterface $form_state
 *   The form state.
 * @param array $complete_form
 *   The form element.
 *
 * @return array
 *   The altered render element.
 */
function _grapesjs_editor_text_format_processor(array $element, FormStateInterface $form_state, array &$complete_form) {
  if (!empty($element['format']) && isset($element['format']['format']['#options']['grapesjs_editor'])) {
    // By default let's assume that GrapesJS Editor format is not allowed.
    $grapesjs_editor_allowed = FALSE;
    /** @var \Drupal\Core\Entity\ContentEntityForm $form */
    $form = $form_state->getFormObject();
    // Check whether the form that contains the element is an EntityForm.
    if ($form instanceof EntityFormInterface) {
      // Get the entity from the form object for further processing.
      $entity = $form->getEntity();
      // Check whether entity is of node type, because currently only them are
      // supported.
      $grapesjs_editor_allowed = $entity instanceof NodeInterface || $entity instanceof BlockContentInterface;
    }
    // If GrapesJS Editor is not enabled for the current form or
    // current user is not allowed to use the format, disable the choice of
    // GrapesJS Editor format for this element.
    if (!$grapesjs_editor_allowed) {
      unset($element['format']['format']['#options']['grapesjs_editor']);
    }
  }

  return $element;
}