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 /* This file is part of the KDE project
  * Copyright (C) 2011 Ko GmbH <cbo@kogmbh.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * 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 INDEXGENERATORMANAGER_H
 #define INDEXGENERATORMANAGER_H
 
 
 #include <QObject>
 #include <QMetaType>
 #include <QHash>
 #include <QTimer>
 
 class QTextDocument;
 class KoTextDocumentLayout;
 class KoTableOfContentsGeneratorInfo;
 class ToCGenerator;
 
 class IndexGeneratorManager : public QObject
 {
     Q_OBJECT
 private:
     explicit IndexGeneratorManager(QTextDocument *document);
 public:
     ~IndexGeneratorManager() override;
 
     static IndexGeneratorManager *instance(QTextDocument *document);
 
     bool generate();
 
 public Q_SLOTS:
     void requestGeneration();
     void startDoneTimer();
 
 private Q_SLOTS:
     void layoutDone();
     void timeout();
 
 private:
     enum State {
         Resting,  // We are not doing anything, and don't need to either
         FirstRunNeeded, // We would like to update the indexes, with dummy pg nums
         FirstRun, // Updating indexes, so prevent layout and ignore documentChanged()
         FirstRunLayouting, // KoTextDocumentLayout is layouting so sit still
         SecondRunNeeded, // Would like to update the indexes, getting pg nums right
         SecondRun, // Updating indexes, so prevent layout and ignore documentChanged()
         SecondRunLayouting // KoTextDocumentLayout is layouting so sit still
     };
     QTextDocument *m_document;
     KoTextDocumentLayout *m_documentLayout;
     QHash<KoTableOfContentsGeneratorInfo *, ToCGenerator *> m_generators;
     State m_state;
     QTimer m_updateTimer;
     QTimer m_doneTimer;
 };
 
 Q_DECLARE_METATYPE(IndexGeneratorManager *)
 
 #endif