Add AttrDef_Id, as well as amend the accumulator by adding a load.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@131 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrDef/ID.php

@@ -0,0 +1,37 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/IDAccumulator.php';
+
+class HTMLPurifier_AttrDef_ID extends HTMLPurifier_AttrDef
+{
+    
+    function validate($id, $accumulator) {
+        
+        $id = @ (string) $id; // sanity check
+        
+        if ($id === '') return false;
+        if (isset($accumulator->ids[$id])) return false;
+        
+        // we purposely avoid using regex, hopefully this is faster
+        
+        if (ctype_alpha($id)) {
+            $result = true;
+        } else {
+            if (!ctype_alpha(@$id[0])) return false;
+            $trim = trim(
+                $id,
+                'A..Za..z0..9:-._'
+              );
+            $result = ($trim === '');
+        }
+        
+        if ($result) $accumulator->add($id);
+        
+        return $result;
+        
+    }
+    
+}
+
+?>

library/HTMLPurifier/IDAccumulator.php

@@ -10,6 +10,12 @@ class HTMLPurifier_IDAccumulator
         return $this->ids[$id] = true;
     }
     
+    function load($array_of_ids) {
+        foreach ($array_of_ids as $id) {
+            $this->ids[$id] = true;
+        }
+    }
+    
 }
 
 ?>