Escape story fields and clean story HTML with HTML Purifier.

Add HTML Purifier 4.19.1. Stories are purified when they are saved and
when they are shown.

lib/htmlpurifier-4.19.1/library/HTMLPurifier/AttrDef/CSS/Ratio.php

@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * Validates a ratio as defined by the CSS spec.
+ */
+class HTMLPurifier_AttrDef_CSS_Ratio extends HTMLPurifier_AttrDef
+{
+    /**
+     * @param   string               $ratio   Ratio to validate
+     * @param   HTMLPurifier_Config  $config  Configuration options
+     * @param   HTMLPurifier_Context $context Context
+     *
+     * @return  string|boolean
+     *
+     * @warning Some contexts do not pass $config, $context. These
+     *          variables should not be used without checking HTMLPurifier_Length
+     */
+    public function validate($ratio, $config, $context)
+    {
+        $ratio = $this->parseCDATA($ratio);
+
+        $parts = explode('/', $ratio, 2);
+        $length = count($parts);
+
+        if ($length < 1 || $length > 2) {
+            return false;
+        }
+
+        $num = new \HTMLPurifier_AttrDef_CSS_Number();
+
+        if ($length === 1) {
+            return $num->validate($parts[0], $config, $context);
+        }
+
+        $num1 = $num->validate($parts[0], $config, $context);
+        $num2 = $num->validate($parts[1], $config, $context);
+
+        if ($num1 === false || $num2 === false) {
+            return false;
+        }
+
+        return $num1 . '/' . $num2;
+    }
+}
+
+// vim: et sw=4 sts=4