added a toXml() method to Node

diff --git a/lib/Twig/Node.php b/lib/Twig/Node.php
index f769077..02efca3 100644 (file)
--- a/lib/Twig/Node.php
+++ b/lib/Twig/Node.php
@@ -63,6 +63,32 @@ class Twig_Node implements Twig_NodeInterface, ArrayAccess, Countable, Iterator
         return implode("\n", $repr);
     }
 
+    public function toXml($asDom = false)
+    {
+        $dom = new \DOMDocument('1.0', 'UTF-8');
+        $dom->formatOutput = true;
+        $dom->appendChild($xml = $dom->createElement('twig'));
+
+        $xml->appendChild($node = $dom->createElement('node'));
+        $node->setAttribute('class', get_class($this));
+
+        foreach ($this->attributes as $name => $value) {
+            $node->appendChild($attribute = $dom->createElement('attribute'));
+            $attribute->setAttribute('name', $name);
+            $attribute->appendChild($dom->createTextNode($value));
+        }
+
+        foreach ($this->nodes as $name => $n) {
+            $child = $n->toXml(true)->getElementsByTagName('node')->item(0);
+            $child = $dom->importNode($child, true);
+            $child->setAttribute('name', $name);
+
+            $node->appendChild($child);
+        }
+
+        return $asDom ? $dom : $dom->saveXml();
+    }
+
     public function compile($compiler)
     {
         foreach ($this->nodes as $node) {