Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\Controller;
Chris@0: 
Chris@0: use Drupal\Core\StringTranslation\StringTranslationTrait;
Chris@0: use Drupal\Core\StringTranslation\TranslationInterface;
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@17: use Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface;
Chris@0: use Symfony\Component\Routing\Route;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides the default implementation of the title resolver interface.
Chris@0:  */
Chris@0: class TitleResolver implements TitleResolverInterface {
Chris@0:   use StringTranslationTrait;
Chris@0: 
Chris@0:   /**
Chris@0:    * The controller resolver.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Controller\ControllerResolverInterface
Chris@0:    */
Chris@0:   protected $controllerResolver;
Chris@0: 
Chris@0:   /**
Chris@17:    * The argument resolver.
Chris@17:    *
Chris@17:    * @var \Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface
Chris@17:    */
Chris@17:   protected $argumentResolver;
Chris@17: 
Chris@17:   /**
Chris@0:    * Constructs a TitleResolver instance.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Controller\ControllerResolverInterface $controller_resolver
Chris@0:    *   The controller resolver.
Chris@0:    * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
Chris@0:    *   The translation manager.
Chris@17:    * @param \Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface $argument_resolver
Chris@17:    *   The argument resolver.
Chris@0:    */
Chris@17:   public function __construct(ControllerResolverInterface $controller_resolver, TranslationInterface $string_translation, ArgumentResolverInterface $argument_resolver) {
Chris@0:     $this->controllerResolver = $controller_resolver;
Chris@0:     $this->stringTranslation = $string_translation;
Chris@17:     $this->argumentResolver = $argument_resolver;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getTitle(Request $request, Route $route) {
Chris@0:     $route_title = NULL;
Chris@0:     // A dynamic title takes priority. Route::getDefault() returns NULL if the
Chris@0:     // named default is not set.  By testing the value directly, we also avoid
Chris@0:     // trying to use empty values.
Chris@0:     if ($callback = $route->getDefault('_title_callback')) {
Chris@0:       $callable = $this->controllerResolver->getControllerFromDefinition($callback);
Chris@17:       $arguments = $this->argumentResolver->getArguments($request, $callable);
Chris@0:       $route_title = call_user_func_array($callable, $arguments);
Chris@0:     }
Chris@0:     elseif ($title = $route->getDefault('_title')) {
Chris@0:       $options = [];
Chris@0:       if ($context = $route->getDefault('_title_context')) {
Chris@0:         $options['context'] = $context;
Chris@0:       }
Chris@0:       $args = [];
Chris@0:       if (($raw_parameters = $request->attributes->get('_raw_variables'))) {
Chris@0:         foreach ($raw_parameters->all() as $key => $value) {
Chris@0:           $args['@' . $key] = $value;
Chris@0:           $args['%' . $key] = $value;
Chris@0:         }
Chris@0:       }
Chris@0:       if ($title_arguments = $route->getDefault('_title_arguments')) {
Chris@0:         $args = array_merge($args, (array) $title_arguments);
Chris@0:       }
Chris@0: 
Chris@0:       // Fall back to a static string from the route.
Chris@0:       $route_title = $this->t($title, $args, $options);
Chris@0:     }
Chris@0:     return $route_title;
Chris@0:   }
Chris@0: 
Chris@0: }