Twig update to latest Twig 1.x legacy as per vichan

inc/lib/Twig/FileExtensionEscapingStrategy.php

@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Default autoescaping strategy based on file names.
+ *
+ * This strategy sets the HTML as the default autoescaping strategy,
+ * but changes it based on the template name.
+ *
+ * Note that there is no runtime performance impact as the
+ * default autoescaping strategy is set at compilation time.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_FileExtensionEscapingStrategy
+{
+    /**
+     * Guesses the best autoescaping strategy based on the file name.
+     *
+     * @param string $name The template name
+     *
+     * @return string|false The escaping strategy name to use or false to disable
+     */
+    public static function guess($name)
+    {
+        if (in_array(substr($name, -1), array('/', '\\'))) {
+            return 'html'; // return html for directories
+        }
+
+        if ('.twig' === substr($name, -5)) {
+            $name = substr($name, 0, -5);
+        }
+
+        $extension = pathinfo($name, PATHINFO_EXTENSION);
+
+        switch ($extension) {
+            case 'js':
+                return 'js';
+
+            case 'css':
+                return 'css';
+
+            case 'txt':
+                return false;
+
+            default:
+                return 'html';
+        }
+    }
+}
+
+class_alias('Twig_FileExtensionEscapingStrategy', 'Twig\FileExtensionEscapingStrategy', false);