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 /* This file is part of the Calligra libraries
    Copyright (C) 2001 Werner Trobin <trobin@kde.org>
 
 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 KOFILTERGRAPH_H
 #define KOFILTERGRAPH_H
 
 #include "komain_export.h"
 #include "KoFilterChain.h"
 #include "KoFilterVertex.h"
 #include <QByteArray>
 #include <QHash>
 
 namespace CalligraFilter {
 
 /**
  * The main worker behind the scenes. Manages the creation of the graph,
  * processing the information in it, and creating the filter chains.
  * @internal
  * Only exported for unit tests.
  */
 class KOMAIN_TEST_EXPORT Graph
 {
 
 public:
     explicit Graph(const QByteArray& from);
     ~Graph();
 
     bool isValid() const {
         return m_graphValid;
     }
 
     QByteArray sourceMimeType() const {
         return m_from;
     }
     void setSourceMimeType(const QByteArray& from);
 
     // Creates a chain from "from" to the "to" mimetype
     // If the "to" mimetype isEmpty() then we try to find the
     // closest Calligra mimetype and use that as destination.
     // After such a search "to" will contain the dest. mimetype (return value)
     // if the search was successful. Might return 0!
     KoFilterChain::Ptr chain(const KoFilterManager* manager, QByteArray& to) const;
 
     // debugging
     void dump() const;
 
 private:
     Graph(const Graph& rhs);
     Graph& operator=(const Graph& rhs);
 
     void buildGraph();
     void shortestPaths();
     QByteArray findCalligraPart() const;
 
     QHash<QByteArray, CalligraFilter::Vertex*> m_vertices;
     QByteArray m_from;
     bool m_graphValid;
 
     class Private;
     Private * const d;
 };
 
 }
 #endif // KOFILTERGRAPH_H