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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\Render\MainContent\AjaxRenderer. | |
| */ | |
| namespace Drupal\Core\Render\MainContent; | |
| use Drupal\Core\Ajax\AjaxResponse; | |
| use Drupal\Core\Ajax\AlertCommand; | |
| use Drupal\Core\Ajax\InsertCommand; | |
| use Drupal\Core\Ajax\PrependCommand; | |
| use Drupal\Core\Render\ElementInfoManagerInterface; | |
| use Drupal\Core\Routing\RouteMatchInterface; | |
| use Symfony\Component\HttpFoundation\Request; | |
| /** | |
| * Default main content renderer for Ajax requests. | |
| */ | |
| class AjaxRenderer implements MainContentRendererInterface { | |
| /** | |
| * The controller resolver. | |
| * | |
| * @var \Drupal\Core\Controller\ControllerResolverInterface | |
| */ | |
| protected $controllerResolver; | |
| /** | |
| * The element info manager. | |
| * | |
| * @var \Drupal\Core\Render\ElementInfoManagerInterface | |
| */ | |
| protected $elementInfoManager; | |
| /** | |
| * Constructs a new AjaxRenderer instance. | |
| * | |
| * @param \Drupal\Core\Render\ElementInfoManagerInterface $element_info_manager | |
| * The element info manager. | |
| */ | |
| public function __construct(ElementInfoManagerInterface $element_info_manager) { | |
| $this->elementInfoManager = $element_info_manager; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function renderResponse(array $main_content, Request $request, RouteMatchInterface $route_match) { | |
| $response = new AjaxResponse(); | |
| if (isset($main_content['#type']) && ($main_content['#type'] == 'ajax')) { | |
| // Complex Ajax callbacks can return a result that contains an error | |
| // message or a specific set of commands to send to the browser. | |
| $main_content += $this->elementInfoManager->getInfo('ajax'); | |
| $error = $main_content['#error']; | |
| if (!empty($error)) { | |
| // Fall back to some default message otherwise use the specific one. | |
| if (!is_string($error)) { | |
| $error = 'An error occurred while handling the request: The server received invalid input.'; | |
| } | |
| $response->addCommand(new AlertCommand($error)); | |
| } | |
| } | |
| $html = $this->drupalRenderRoot($main_content); | |
| $response->setAttachments($main_content['#attached']); | |
| // The selector for the insert command is NULL as the new content will | |
| // replace the element making the Ajax call. The default 'replaceWith' | |
| // behavior can be changed with #ajax['method']. | |
| $response->addCommand(new InsertCommand(NULL, $html)); | |
| $status_messages = array('#type' => 'status_messages'); | |
| $output = $this->drupalRenderRoot($status_messages); | |
| if (!empty($output)) { | |
| $response->addCommand(new PrependCommand(NULL, $output)); | |
| } | |
| return $response; | |
| } | |
| /** | |
| * Wraps drupal_render_root(). | |
| * | |
| * @todo Remove as part of https://www.drupal.org/node/2182149. | |
| */ | |
| protected function drupalRenderRoot(&$elements) { | |
| return drupal_render_root($elements); | |
| } | |
| } |