Commit dud AttrDef integer.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@235 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrDef/Integer.php

@@ -0,0 +1,37 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+// appears to be a dud class: no currently allowed CSS uses this type
+// Uses this: widows, orphans, z-index, counter-increment, counter-reset
+
+class HTMLPurifier_AttrDef_Integer extends HTMLPurifier_AttrDef
+{
+    
+    var $non_negative = false;
+    
+    function HTMLPurifier_AttrDef_Integer($non_negative = false) {
+        $this->non_negative = $non_negative;
+    }
+    
+    function validate($integer, $config, &$context) {
+        
+        $integer = $this->parseCDATA($integer);
+        if ($integer === '') return false;
+        
+        if ( !$this->non_negative && $integer[0] === '-' ) {
+            $digits = substr($integer, 1);
+        } elseif( $integer[0] === '+' ) {
+            $digits = $integer = substr($integer, 1);
+        } else {
+            $digits = $integer;
+        }
+        
+        if (!ctype_digit($digits)) return false;
+        return $integer;
+        
+    }
+    
+}
+
+?>