Implement AttrDef_Class.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@157 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrDef/Class.php

@@ -0,0 +1,43 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/Config.php';
+
+class HTMLPurifier_AttrDef_Class extends HTMLPurifier_AttrDef
+{
+    
+    function validate($raw_string, $config = null) {
+        
+        if (!$config) $config = HTMLPurifier_Config::createDefault();
+        
+        $string = trim($raw_string);
+        
+        // early abort: '' and '0' (strings that convert to false) are invalid
+        if (!$string) return false;
+        
+        // OPTIMIZABLE!
+        // do the preg_match, capture all subpatterns for reformulation
+        
+        // we don't support U+00A1 and up codepoints or
+        // escaping because I don't know how to do that with regexps
+        // and plus it would complicate optimization efforts (you never
+        // see that anyway).
+        $matches = array();
+        $pattern = '/(?:\s|\A)'.
+                   '((?:-?[A-Za-z_]|--)[A-Za-z_\-0-9]*)'.
+                   '(?:\s|\z)/';
+        preg_match_all($pattern, $string, $matches);
+        
+        $new_string = '';
+        foreach ($matches[1] as $class_names) {
+            $new_string .= $class_names . ' ';
+        }
+        $new_string = rtrim($new_string);
+        
+        return ($new_string == $raw_string) ? true : $new_string ? $new_string : false;
+        
+    }
+    
+}
+
+?>

library/HTMLPurifier/AttrDef/ID.php

@@ -2,6 +2,12 @@
 
 require_once 'HTMLPurifier/AttrDef.php';
 require_once 'HTMLPurifier/IDAccumulator.php';
+        
+// NOTE QUIRKY BEHAVIOR: even though this is the id processor, it
+// will ignore HTMLPurifier_Config::$attr_id_blacklist: it will only
+// go according to the ID accumulator. Since the accumulator is
+// automatically generated, it will have already absorbed the
+// blacklist. If you're hacking around, make sure you use load()!
 
 class HTMLPurifier_AttrDef_ID extends HTMLPurifier_AttrDef
 {

library/HTMLPurifier/Definition.php

@@ -237,6 +237,7 @@ class HTMLPurifier_Definition
         $this->info_global_attr = array(
             // core attrs
             'id' => new HTMLPurifier_AttrDef_ID(),
+            'class' => new HTMLPurifier_AttrDef_Class(),
             // i18n
             'dir' => new HTMLPurifier_AttrDef_Enum(array('ltr','rtl'), false),
             );