From 344043e891e00899e4455e2d48a1c38c05455fcc Mon Sep 17 00:00:00 2001
From: Fabien Potencier <fabien.potencier@gmail.com>
Date: Sun, 16 Oct 2011 11:09:54 +0200
Subject: [PATCH] made the escape filter smarter when the encoding is not supported by PHP

---
 CHANGELOG                   |    1 +
 lib/Twig/Extension/Core.php |   23 ++++++++++++++++++++++-
 2 files changed, 23 insertions(+), 1 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index cf0646f..84b314b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,6 @@
 * 1.4.0
 
+ * made the escape filter smarter when the encoding is not supported by PHP
  * added a convert_encoding filter
  * moved all node manipulations outside the compile() Node method
  * made several speed optimizations
diff --git a/lib/Twig/Extension/Core.php b/lib/Twig/Extension/Core.php
index 2d2c22e..d0f6acb 100644
--- a/lib/Twig/Extension/Core.php
+++ b/lib/Twig/Extension/Core.php
@@ -510,7 +510,28 @@ function twig_escape_filter(Twig_Environment $env, $string, $type = 'html', $cha
             return $string;
 
         case 'html':
-            return htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, $charset);
+            // see http://php.net/htmlspecialchars
+            if (in_array(strtolower($charset), array(
+                'iso-8859-1', 'iso8859-1',
+                'iso-8859-15', 'iso8859-15',
+                'utf-8',
+                'cp866', 'ibm866', '866',
+                'cp1251', 'win-1251', '1251',
+                'cp1252', '1252',
+                'koi8-r', 'koi8-ru', 'koi8r',
+                'big5', '950',
+                'gb2312', '936',
+                'big5-hkscs', 'big5',
+                'shift_jis', 'sjis', '932',
+                'euc-jp', 'eucjp',
+            ))) {
+                return htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, $charset);
+            }
+
+            $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            $string = htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+
+            return twig_convert_encoding($string, $charset, 'UTF-8');
 
         default:
             throw new Twig_Error_Runtime(sprintf('Invalid escape type "%s".', $type));
-- 
1.7.2.5