--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/includes/diffengine/Renderer/unified.php	Wed Jun 13 16:07:17 2007 -0400
@@ -0,0 +1,50 @@
+<?php
+
+/**
+ * "Unified" diff renderer.
+ *
+ * This class renders the diff in classic "unified diff" format.
+ *
+ * $Horde: framework/Text_Diff/Diff/Renderer/unified.php,v 1.5 2006/01/08 00:06:57 jan Exp $
+ *
+ * @package Text_Diff
+ */
+class Text_Diff_Renderer_unified extends Text_Diff_Renderer {
+
+    /**
+     * Number of leading context "lines" to preserve.
+     */
+    var $_leading_context_lines = 4;
+
+    /**
+     * Number of trailing context "lines" to preserve.
+     */
+    var $_trailing_context_lines = 4;
+
+    function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
+    {
+        if ($xlen != 1) {
+            $xbeg .= ',' . $xlen;
+        }
+        if ($ylen != 1) {
+            $ybeg .= ',' . $ylen;
+        }
+        return "@@ -$xbeg +$ybeg @@";
+    }
+
+    function _added($lines)
+    {
+        return $this->_lines($lines, '+');
+    }
+
+    function _deleted($lines)
+    {
+        return $this->_lines($lines, '-');
+    }
+
+    function _changed($orig, $final)
+    {
+        return $this->_deleted($orig) . $this->_added($final);
+    }
+
+}