kateundomanager.h

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/* This file is part of the KDE libraries
   Copyright (C) 2009-2010 Bernhard Beschow <bbeschow@cs.tu-berlin.de>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License version 2 as published by the Free Software Foundation.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#ifndef KATEUNDOMANAGER_H
#define KATEUNDOMANAGER_H

#include <QtCore/QObject>

#include "katepartprivate_export.h"

#include <QtCore/QList>

class KateDocument;
class KateUndo;
class KateUndoGroup;

namespace KTextEditor {
  class Document;
  class View;
  class Cursor;
}

class KATEPART_TESTS_EXPORT KateUndoManager : public QObject
{
  Q_OBJECT

  public:
    KateUndoManager (KateDocument *doc);

    ~KateUndoManager();

    KTextEditor::Document *document();

    uint undoCount () const;

    uint redoCount () const;

    void undoSafePoint();

    void setAllowComplexMerge(bool allow);

    bool isActive() const { return m_isActive; }

    void setModified( bool modified );
    void updateConfig ();
    void updateLineModifications();

    void setUndoRedoCursorsOfLastGroup(const KTextEditor::Cursor undoCursor,
                                       const KTextEditor::Cursor redoCursor);

    KTextEditor::Cursor lastRedoCursor() const;

  public Q_SLOTS:
    void undo ();

    void redo ();

    void clearUndo ();
    void clearRedo ();

    void editStart();

    void editEnd();

    void startUndo();
    void endUndo();

    void inputMethodStart();
    void inputMethodEnd();

    void slotTextInserted(int line, int col, const QString &s);

    void slotTextRemoved(int line, int col, const QString &s);

    void slotMarkLineAutoWrapped(int line, bool autowrapped);

    void slotLineWrapped(int line, int col, int length, bool newLine);

    void slotLineUnWrapped(int line, int col, int length, bool lineRemoved);

    void slotLineInserted(int line, const QString &s);

    void slotLineRemoved(int line, const QString &s);

  Q_SIGNALS:
    void undoChanged ();
    void undoStart (KTextEditor::Document*);
    void undoEnd (KTextEditor::Document*);
    void redoStart (KTextEditor::Document*);
    void redoEnd (KTextEditor::Document*);
    void isActiveChanged(bool enabled);

  private Q_SLOTS:
    void addUndoItem(KateUndo *undo);

    void setActive(bool active);

    void updateModified();

    void undoCancel();
    void viewCreated (KTextEditor::Document *, KTextEditor::View *newView);

  private:
    KTextEditor::View *activeView();

  private:
    KateDocument *m_document;
    bool m_undoComplexMerge;
    bool m_isActive;
    KateUndoGroup* m_editCurrentUndo;
    QList<KateUndoGroup*> undoItems;
    QList<KateUndoGroup*> redoItems;
    // these two variables are for resetting the document to
    // non-modified if all changes have been undone...
    KateUndoGroup* lastUndoGroupWhenSaved;
    KateUndoGroup* lastRedoGroupWhenSaved;
    bool docWasSavedWhenUndoWasEmpty;
    bool docWasSavedWhenRedoWasEmpty;
};

#endif

// kate: space-indent on; indent-width 2; replace-tabs on;