Move internal structures and some functions into diffutils.h

Change-Id: Ia55e556fdb8de3a2aeebf768ad9db66d840766f2
Reviewed-by: Jarek Kobus <jaroslaw.kobus@digia.com>

src/plugins/diffeditor/diffutils.h

@@ -0,0 +1,96 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef DIFFUTILS_H
+#define DIFFUTILS_H
+
+#include <QString>
+#include <QMap>
+#include "diffeditorcontroller.h"
+
+namespace DiffEditor {
+
+class Diff;
+
+namespace Internal {
+
+class TextLineData {
+public:
+    enum TextLineType {
+        TextLine,
+        Separator,
+        Invalid
+    };
+    TextLineData() : textLineType(Invalid) {}
+    TextLineData(const QString &txt) : textLineType(TextLine), text(txt) {}
+    TextLineData(TextLineType t) : textLineType(t) {}
+    TextLineType textLineType;
+    QString text;
+};
+
+class RowData {
+public:
+    RowData() : equal(false) {}
+    RowData(const TextLineData &l)
+        : leftLine(l), rightLine(l), equal(true) {}
+    RowData(const TextLineData &l, const TextLineData &r)
+        : leftLine(l), rightLine(r), equal(false) {}
+    TextLineData leftLine;
+    TextLineData rightLine;
+    bool equal;
+};
+
+class ChunkData {
+public:
+    ChunkData() : contextChunk(false) {}
+    QList<RowData> rows;
+    bool contextChunk;
+    // start position, end position, TextLineData::Separator lines not taken into account
+    QMap<int, int> changedLeftPositions; // counting from the beginning of the chunk
+    QMap<int, int> changedRightPositions; // counting from the beginning of the chunk
+};
+
+class FileData {
+public:
+    FileData() {}
+    FileData(const ChunkData &chunkData) { chunks.append(chunkData); }
+    QList<ChunkData> chunks;
+    DiffEditorController::DiffFileInfo leftFileInfo;
+    DiffEditorController::DiffFileInfo rightFileInfo;
+};
+
+ChunkData calculateOriginalData(const QList<Diff> &leftDiffList,
+                                const QList<Diff> &rightDiffList);
+FileData calculateContextData(const ChunkData &originalData,
+                              int contextLinesNumber);
+
+} // namespace Internal
+} // namespace DiffEditor
+
+#endif // DIFFUTILS_H