Index: /trunk/modules/diff/node.inc
===================================================================
--- /trunk/modules/diff/node.inc (revision 1003)
+++ /trunk/modules/diff/node.inc (revision 1154)
@@ -1,23 +1,33 @@
 <?php
 // $Id: node.inc,v 1.1 2007/01/31 17:45:25 dww Exp $
 
+// Amherst: Added the _node_diff_filter() function and calls to it
 /**
  * Implementation of hook_diff() for node.module (body and title).
  */
 function node_diff(&$old_node, &$new_node) {
   $result = array();
   $result[] = array(
     'name' => t('Title'),
-    'old' => array($old_node->title),
-    'new' => array($new_node->title),
+    'old' => _node_diff_filter($old_node->title),
+    'new' => _node_diff_filter($new_node->title),
     'format' => array(
       'show_header' => false,
     )
   );
   $result[] = array(
     'name' => t('Body'),
-    'old' => explode("\n", $old_node->body),
-    'new' => explode("\n", $new_node->body),
+    'old' => _node_diff_filter($old_node->body),
+    'new' => _node_diff_filter($new_node->body),
   );
   return $result;	
 }
+
+function _node_diff_filter($text) {
+  $text = preg_replace( '#(</?(?:h\d|p|li|div|th|pre|xmp|td|ul|ol|br|blockquote)>)+#i', "\n", $text );
+  $text = preg_replace( '/<.*?>/', ' ',  $text );
+  $text = preg_replace( '/  */',   ' ',  $text );
+  $text = preg_replace( '/\n\n*/', "\n", $text );
+
+  return preg_split('/\n/', $text);
+}