1 files changed, 47 insertions, 0 deletions
diff --git a/library/HTMLPurifier/AttrDef/CSS/Length.php b/library/HTMLPurifier/AttrDef/CSS/Length.php
new file mode 100644
index 000000000..a07ec5813
--- /dev/null
+++ b/library/HTMLPurifier/AttrDef/CSS/Length.php
@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * Represents a Length as defined by CSS.
+ */
+class HTMLPurifier_AttrDef_CSS_Length extends HTMLPurifier_AttrDef
+{
+
+    protected $min, $max;
+
+    /**
+     * @param HTMLPurifier_Length $max Minimum length, or null for no bound. String is also acceptable.
+     * @param HTMLPurifier_Length $max Maximum length, or null for no bound. String is also acceptable.
+     */
+    public function __construct($min = null, $max = null) {
+        $this->min = $min !== null ? HTMLPurifier_Length::make($min) : null;
+        $this->max = $max !== null ? HTMLPurifier_Length::make($max) : null;
+    }
+
+    public function validate($string, $config, $context) {
+        $string = $this->parseCDATA($string);
+
+        // Optimizations
+        if ($string === '') return false;
+        if ($string === '0') return '0';
+        if (strlen($string) === 1) return false;
+
+        $length = HTMLPurifier_Length::make($string);
+        if (!$length->isValid()) return false;
+
+        if ($this->min) {
+            $c = $length->compareTo($this->min);
+            if ($c === false) return false;
+            if ($c < 0) return false;
+        }
+        if ($this->max) {
+            $c = $length->compareTo($this->max);
+            if ($c === false) return false;
+            if ($c > 0) return false;
+        }
+
+        return $length->toString();
+    }
+
+}
+
+// vim: et sw=4 sts=4