views_limit_grouping.module

<?php

/**
 * @file
 * Contains views_limit_grouping.module..
 */

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Template\Attribute;

/**
 * Implements hook_help().
 */
function views_limit_grouping_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the views_limit_grouping module.
    case 'help.page.views_limit_grouping':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Views display plugin that allows limit the number of rows under each grouping field in a view') . '</p>';
      return $output;

    default:
  }
}

/**
 * Prepares variables for views limitgrouping rows templates.
 *
 * Default template: views-view-limitgrouping.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - view: The view object.
 *   - rows: An array of row items. Each row is an array of content.
 */
function template_preprocess_views_view_limitgrouping(&$variables) {
  $view = $variables['view'];
  $rows = $variables['rows'];
  $style = $view->style_plugin;
  $options = $style->options;

  $variables['default_row_class'] = !empty($options['default_row_class']);
  foreach ($rows as $id => $row) {
    $variables['rows'][$id] = [];
    $variables['rows'][$id]['content'] = $row;
    $variables['rows'][$id]['attributes'] = new Attribute();
    if ($row_class = $view->style_plugin->getRowClass($id)) {
      $variables['rows'][$id]['attributes']->addClass($row_class);
    }
  }
}