Commit initial implementation of AttrDef_CSS, with text-align being the only defined property. Further development will be going on in AttrDef and CSSDefinition.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@223 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrDef/CSS.php

@@ -0,0 +1,35 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/CSSDefinition.php';
+
+class HTMLPurifier_AttrDef_CSS
+{
+    
+    function validate($css, $config, &$context) {
+        
+        $definition = HTMLPurifier_CSSDefinition::instance();
+        
+        // we're going to break the spec and explode by semicolons.
+        // This is because semicolon rarely appears in escaped form
+        
+        $declarations = explode(';', $css);
+        $new_declarations = '';
+        
+        foreach ($declarations as $declaration) {
+            if (!$declaration) continue;
+            if (!strpos($declaration, ':')) continue;
+            list($property, $value) = explode(':', $declaration, 2);
+            if (!isset($definition->info[$property])) continue;
+            $result = $definition->info[$property]->validate($value,$config,$context);
+            if ($result === false) continue;
+            $new_declarations .= "$property:$result;";
+        }
+        
+        return $new_declarations ? $new_declarations : false;
+        
+    }
+    
+}
+
+?>

library/HTMLPurifier/CSSDefinition.php

@@ -0,0 +1,30 @@
+<?php
+
+class HTMLPurifier_CSSDefinition
+{
+    
+    var $info = array();
+    
+    function &instance($prototype = null) {
+        static $instance = null;
+        if ($prototype) {
+            $instance = $prototype;
+        } elseif (!$instance) {
+            $instance = new HTMLPurifier_CSSDefinition();
+            $instance->setup();
+        }
+        return $instance;
+    }
+    
+    function HTMLPurifier_CSSDefinition() {}
+    
+    function setup() {
+        
+        $this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
+            array('left', 'right', 'center', 'justify'), false);
+        
+    }
+    
+}
+
+?>

library/HTMLPurifier/Definition.php

@@ -255,6 +255,7 @@ class HTMLPurifier_Definition
             'id'    => new HTMLPurifier_AttrDef_ID(),
             'class' => new HTMLPurifier_AttrDef_Class(),
             'title' => $e_Text,
+            'style' => new HTMLPurifier_AttrDef_CSS(),
             // i18n
             'dir'   => new HTMLPurifier_AttrDef_Enum(array('ltr','rtl'), false),
             'lang'  => new HTMLPurifier_AttrDef_Lang(),

library/HTMLPurifier/Generator.php

@@ -1,5 +1,7 @@
 <?php
 
+// pretty-printing with indentation would be pretty cool
+
 class HTMLPurifier_Generator
 {