Indenter is now a separate class which can be reused through composition. Added it to the generic editor.

src/plugins/texteditor/indenter.h

@@ -0,0 +1,63 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#ifndef INDENTER_H
+#define INDENTER_H
+
+#include "texteditor_global.h"
+
+#include <QtCore/QChar>
+#include <QtGui/QTextBlock>
+
+QT_BEGIN_NAMESPACE
+class QTextDocument;
+QT_END_NAMESPACE
+
+namespace TextEditor {
+
+struct TabSettings;
+
+class TEXTEDITOR_EXPORT Indenter
+{
+public:
+    Indenter();
+    virtual ~Indenter();
+
+    void indentBlock(QTextDocument *doc, QTextBlock block, QChar typedChar, const TabSettings &ts);
+
+private:
+    virtual void doIndentBlock(QTextDocument *doc,
+                               QTextBlock block,
+                               QChar typedChar,
+                               const TabSettings &ts) = 0;
+};
+
+} // namespace TextEditor
+
+#endif // INDENTER_H