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