gridstack-8.x-2.5/src/Plugin/Layout/GridStackLayout.php

<?php

namespace Drupal\gridstack\Plugin\Layout;

use Drupal\Component\Serialization\Json;
use Drupal\Core\Render\Element;
use Drupal\gridstack\GridStackDefault;
use Drupal\gridstack\Entity\GridStack;

/**
 * Provides a GridStack class for Layout plugins.
 */
class GridStackLayout extends GridStackLayoutBase {

  /**
   * {@inheritdoc}
   */
  public function build(array $regions) {
    $config     = $this->getConfiguration();
    $definition = $this->getPluginDefinition();
    $name       = $definition->get('optionset');
    $optionset  = GridStack::loadWithFallback($name);
    $grids      = $optionset->getEndBreakpointGrids();
    $ipe_exists = $this->manager->getModuleHandler()->moduleExists('panels_ipe');
    $lbr_exists = $this->manager->getModuleHandler()->moduleExists('layout_builder');

    // Only check that Panels IPE is granted. Further access check is not here.
    // @see \Drupal\gridstack\GridStackManager::preRenderGridStack()
    $settings = [
      'optionset' => $name,
      'extras'    => empty($config['extras']) ? [] : Json::decode($config['extras']),
      '_panels'   => $ipe_exists && $this->currentUser->hasPermission('access panels in-place editing'),
      '_layouts'  => $lbr_exists && $this->currentUser->hasPermission('configure any layout'),
    ] + GridStackDefault::fixedSettings() + $config;

    // Converts gridstack breakpoint grids from stored JSON into array.
    // @todo $optionset->gridsJsonToArray($settings);
    ksort($regions);

    $item_id = $settings['item_id'];
    $items = [];
    foreach ($grids as $delta => $grid) {
      $rid = GridStackDefault::regionId($delta);
      $box = [];

      $box_settings = $settings;
      // Remove top level attributes settings.
      unset($box_settings['attributes'], $box_settings['wrapper'], $box_settings['wrapper_classes']);
      $box['settings'] = $box_settings;

      $nested_grids = $optionset->getNestedGridsByDelta($delta);
      $is_nested = array_filter($nested_grids);

      if (!empty($is_nested)) {
        foreach ($nested_grids as $key => $nested_grid) {
          $rid = GridStackDefault::regionId($delta . '_' . $key);

          // Preserves indices even if empty.
          $box[$item_id][$key][$item_id] = isset($regions[$rid]) && !Element::isEmpty($regions[$rid]) ? $regions[$rid] : [];
        }
      }
      else {
        // Preserves indices even if empty.
        $box[$item_id] = isset($regions[$rid]) && !Element::isEmpty($regions[$rid]) ? $regions[$rid] : [];
      }

      $items[] = $box;
      unset($box);
    }

    $build = [
      'items'     => $items,
      'optionset' => $optionset,
      'settings'  => $settings,
      'layout'    => $definition,
    ];

    return $this->manager->build($build);
  }

}