feature #12046 fixed translator locale when dealing with sub-requests (fabpot)

This PR was merged into the 2.6-dev branch.

Discussion
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fixed translator locale when dealing with sub-requests

| Q             | A
| ------------- | ---
| Bug fix?      | yes, kinda
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

This fixes the (edge) case where the locale of a sub-requests is different from the locale of the master request. The listener synchronizes the translator locale with the one from the request.

Commits
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0e65af2 fixed translator locale when dealing with sub-requests

Author: fabpot

EventListener/TranslatorListener.php

@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\EventListener;
+
+use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\Translator\TranslatorInterface;
+
+/**
+ * Synchronizes the locale between the request and the translator.
+ *
+ * @author Fabien Potencier <[email protected]>
+ */
+class TranslatorListener implements EventSubscriberInterface
+{
+    private $translator;
+    private $requestStack;
+
+    public function __construct(TranslatorInterface $translator, RequestStack $requestStack)
+    {
+        $this->translator = $translator;
+        $this->requestStack = $requestStack;
+    }
+
+    public function onKernelRequest(GetResponseEvent $event)
+    {
+        $this->translator->setLocale($event->getRequest()->getLocale());
+    }
+
+    public function onKernelFinishRequest(FinishRequestEvent $event)
+    {
+        if (null !== $parentRequest = $this->requestStack->getParentRequest()) {
+            $this->translator->setLocale($parentRequest->getLocale());
+        }
+    }
+
+    public static function getSubscribedEvents()
+    {
+        return array(
+            // must be registered after the Locale listener
+            KernelEvents::REQUEST => array(array('onKernelRequest', 10)),
+            KernelEvents::FINISH_REQUEST => array(array('onKernelFinishRequest', 0)),
+        );
+    }
+}

composer.json

@@ -32,7 +32,8 @@
         "symfony/process": "~2.0",
         "symfony/routing": "~2.2",
         "symfony/stopwatch": "~2.2",
-        "symfony/templating": "~2.2"
+        "symfony/templating": "~2.2",
+        "symfony/translator": "~2.0"
     },
     "suggest": {
         "symfony/browser-kit": "",