' . t('Layout Discovery allows modules or themes to register layouts, and for other modules to list the available layouts and render them.') . '
'; $output .= '' . t('For more information, see the online documentation for the Layout Discovery module.', [':layout-discovery-documentation' => 'https://www.drupal.org/docs/8/api/layout-api']) . '
'; return $output; } } /** * Implements hook_theme(). */ function layout_discovery_theme() { return \Drupal::service('plugin.manager.core.layout')->getThemeImplementations(); } /** * Prepares variables for layout templates. * * @param array &$variables * An associative array containing: * - content: An associative array containing the properties of the element. * Properties used: #settings, #layout, #in_preview. */ function template_preprocess_layout(&$variables) { $variables['settings'] = $variables['content']['#settings'] ?? []; $variables['layout'] = $variables['content']['#layout'] ?? []; $variables['in_preview'] = $variables['content']['#in_preview'] ?? FALSE; // Create an attributes variable for each region. foreach (Element::children($variables['content']) as $name) { if (!isset($variables['content'][$name]['#attributes'])) { $variables['content'][$name]['#attributes'] = []; } $variables['region_attributes'][$name] = new Attribute($variables['content'][$name]['#attributes']); } }