1 files changed, 33 insertions, 0 deletions
diff --git a/3rdparty/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Color.php b/3rdparty/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Color.php
new file mode 100644
index 000000000..347cca591
--- /dev/null
+++ b/3rdparty/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Color.php
@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * Validates a color according to the HTML spec.
+ */
+class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
+{
+
+    public function validate($string, $config, $context) {
+
+        static $colors = null;
+        if ($colors === null) $colors = $config->get('Core.ColorKeywords');
+
+        $string = trim($string);
+
+        if (empty($string)) return false;
+        $lower = strtolower($string);
+        if (isset($colors[$lower])) return $colors[$lower];
+        if ($string[0] === '#') $hex = substr($string, 1);
+        else $hex = $string;
+
+        $length = strlen($hex);
+        if ($length !== 3 && $length !== 6) return false;
+        if (!ctype_xdigit($hex)) return false;
+        if ($length === 3) $hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
+
+        return "#$hex";
+
+    }
+
+}
+
+// vim: et sw=4 sts=4