From 7a40f4354b32809af3d0cfd6e3af0eda02ab0e0a Mon Sep 17 00:00:00 2001
From: friendica <info@friendica.com>
Date: Sat, 12 May 2012 17:57:41 -0700
Subject: some important stuff we'll need

---
 .../library/HTMLPurifier/AttrDef/CSS/Ident.php     | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Ident.php

(limited to 'lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Ident.php')

diff --git a/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Ident.php b/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Ident.php
new file mode 100644
index 000000000..779794a0b
--- /dev/null
+++ b/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Ident.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * Validates based on {ident} CSS grammar production
+ */
+class HTMLPurifier_AttrDef_CSS_Ident extends HTMLPurifier_AttrDef
+{
+
+    public function validate($string, $config, $context) {
+
+        $string = trim($string);
+
+        // early abort: '' and '0' (strings that convert to false) are invalid
+        if (!$string) return false;
+
+        $pattern = '/^(-?[A-Za-z_][A-Za-z_\-0-9]*)$/';
+        if (!preg_match($pattern, $string)) return false;
+        return $string;
+
+    }
+
+}
+
+// vim: et sw=4 sts=4
-- 
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