bug #402 fix request in DefaultValueSupplier (albert-gonzalez)

This PR was squashed before being merged into the 2.7-dev branch (closes #402).

Discussion
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fix request in DefaultValueSupplier

In Symfony 3 the service 'request' has been removed from the container, and the function isScopeActive doesn't exist anymore. With this fix the Request Stack is injected in DefaultValueSupplier to get the request.

Commits
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29198ae fix request in DefaultValueSupplier

Author: stof

DefaultValueSupplier.php

@@ -30,15 +30,32 @@ public function __construct(ContainerInterface $container)
 
     public function getValues()
     {
-        if (!$this->container->isScopeActive('request')) {
+        $request = $this->getCurrentRequest();
+
+        if (!$request) {
             return array();
         }
 
-        $request = $this->container->get('request');
-
         return array(
             'locale' => $request->getLocale(),
             'env'    => $this->container->getParameter('kernel.environment'),
         );
     }
+
+    /**
+     * @return null|\Symfony\Component\HttpFoundation\Request
+     */
+    private function getCurrentRequest()
+    {
+        $request = null;
+        $requestStack = $this->container->get('request_stack', ContainerInterface::NULL_ON_INVALID_REFERENCE);
+
+        if ($requestStack) {
+            $request = $requestStack->getCurrentRequest();
+        } elseif ($this->container->isScopeActive('request')) {
+            $request = $this->container->get('request');
+        }
+
+        return $request;
+    }
 }