--- /dev/null
+<?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.
+ */
+
+/**
+ * @final
+ */
+class Twig_Extension_Escaper extends Twig_Extension
+{
+ protected $defaultStrategy;
+
+ /**
+ * @param string|false|callable $defaultStrategy An escaping strategy
+ *
+ * @see setDefaultStrategy()
+ */
+ public function __construct($defaultStrategy = 'html')
+ {
+ $this->setDefaultStrategy($defaultStrategy);
+ }
+
+ public function getTokenParsers()
+ {
+ return array(new Twig_TokenParser_AutoEscape());
+ }
+
+ public function getNodeVisitors()
+ {
+ return array(new Twig_NodeVisitor_Escaper());
+ }
+
+ public function getFilters()
+ {
+ return array(
+ new Twig_SimpleFilter('raw', 'twig_raw_filter', array('is_safe' => array('all'))),
+ );
+ }
+
+ /**
+ * Sets the default strategy to use when not defined by the user.
+ *
+ * The strategy can be a valid PHP callback that takes the template
+ * name as an argument and returns the strategy to use.
+ *
+ * @param string|false|callable $defaultStrategy An escaping strategy
+ */
+ public function setDefaultStrategy($defaultStrategy)
+ {
+ // for BC
+ if (true === $defaultStrategy) {
+ @trigger_error('Using "true" as the default strategy is deprecated since version 1.21. Use "html" instead.', E_USER_DEPRECATED);
+
+ $defaultStrategy = 'html';
+ }
+
+ if ('filename' === $defaultStrategy) {
+ @trigger_error('Using "filename" as the default strategy is deprecated since version 1.27. Use "name" instead.', E_USER_DEPRECATED);
+
+ $defaultStrategy = 'name';
+ }
+
+ if ('name' === $defaultStrategy) {
+ $defaultStrategy = array('Twig_FileExtensionEscapingStrategy', 'guess');
+ }
+
+ $this->defaultStrategy = $defaultStrategy;
+ }
+
+ /**
+ * Gets the default strategy to use when not defined by the user.
+ *
+ * @param string $name The template name
+ *
+ * @return string|false The default strategy to use for the template
+ */
+ public function getDefaultStrategy($name)
+ {
+ // disable string callables to avoid calling a function named html or js,
+ // or any other upcoming escaping strategy
+ if (!is_string($this->defaultStrategy) && false !== $this->defaultStrategy) {
+ return call_user_func($this->defaultStrategy, $name);
+ }
+
+ return $this->defaultStrategy;
+ }
+
+ public function getName()
+ {
+ return 'escaper';
+ }
+}
+
+/**
+ * Marks a variable as being safe.
+ *
+ * @param string $string A PHP variable
+ *
+ * @return string
+ */
+function twig_raw_filter($string)
+{
+ return $string;
+}