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diff --git a/kbabel/common/diff.h b/kbabel/common/diff.h
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+/* **************************************************************************
+  This file is part of KBabel
+
+  Copyright (C) 2001 by Matthias Kiefer <kiefer@kde.org>
+  charDiff algorithm by Wolfram Diestel <wolfram@steloj.de>
+  wordDiff algorithm by Nick Shaforostoff <shafff@ukr.net>
+  (based on Markus Stengel's GPL implementation of LCS-Delta algorithm as it is described in "Introduction to Algorithms", MIT Press, 2001, Second Edition, written by Thomas H. Cormen et. al. It uses dynamic programming to solve the Longest Common Subsequence (LCS) problem. - http://www.markusstengel.de/text/en/i_4_1_5_3.html)
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+  In addition, as a special exception, the copyright holders give
+  permission to link the code of this program with any edition of
+  the Qt library by Trolltech AS, Norway (or with modified versions
+  of Qt that use the same license as Qt), and distribute linked
+  combinations including the two.  You must obey the GNU General
+  Public License in all respects for all of the code used other than
+  Qt. If you modify this file, you may extend this exception to
+  your version of the file, but you are not obligated to do so.  If
+  you do not wish to do so, delete this exception statement from
+  your version.
+
+************************************************************************** */
+#ifndef DIFF_H
+#define DIFF_H
+
+#include <qvaluevector.h>
+#include <qstringlist.h>
+
+typedef enum
+{
+    NOTHING       = 0,
+    ARROW_UP      = 1,
+    ARROW_LEFT    = 2,
+    ARROW_UP_LEFT = 3,
+    FINAL         = 4
+} LCSMarker;
+
+
+/**
+ * Word-by-word diff algorithm
+ *
+ * @short Word-by-word diff algorithm
+ * @author Nick Shaforostoff <shafff@ukr.net>
+ */
+    QString wordDiff(const QString& oldString, const QString& newString);
+
+
+/**
+     * This class is for keeping "global" params of recursive function
+     *
+     * @short Class for keeping "global" params of recursive function
+     * @author Nick Shaforostoff <shafff@ukr.net>
+ */
+    class LCSprinter
+{
+    public:
+        LCSprinter(const QStringList &s_1, const QStringList &s_2, QValueVector<LCSMarker>* b_, const uint nT_, uint index);
+        void printLCS(uint index);
+        inline QString getString();
+
+        ~LCSprinter() {};
+    private:
+        QStringList s1, s2, resultString;
+        uint nT;//for use 1d vector as 2d
+        QValueVector<LCSMarker> *b;
+        QStringList::iterator it1, it2;
+};
+
+
+inline QString LCSprinter::getString()
+{
+    return resultString.join("").replace(QChar('\n'), ""); //w/o replace we'd get whole line colored
+}
+
+#endif // DIFF_H
+