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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef INCLUDED_PDFI_TREEVISITING_HXX
      21             : #define INCLUDED_PDFI_TREEVISITING_HXX
      22             : 
      23             : #include <sal/config.h>
      24             : #include <list>
      25             : 
      26             : 
      27             : namespace pdfi
      28             : {
      29             :     struct HyperlinkElement;
      30             :     struct TextElement;
      31             :     struct ParagraphElement;
      32             :     struct FrameElement;
      33             :     struct PolyPolyElement;
      34             :     struct ImageElement;
      35             :     struct PageElement;
      36             :     struct DocumentElement;
      37             :     struct Element;
      38             : 
      39             :     /** To be visited by all tree element types
      40             : 
      41             :         Visitor interface from the "visitor pattern". Implementor gets
      42             :         called with actual tree node instances.
      43             :      */
      44           6 :     struct ElementTreeVisitor
      45             :     {
      46             :         virtual void visit( HyperlinkElement&, const std::list< Element* >::const_iterator& ) = 0;
      47             :         virtual void visit( TextElement&, const std::list< Element* >::const_iterator&  ) = 0;
      48             :         virtual void visit( ParagraphElement&, const std::list< Element* >::const_iterator&  ) = 0;
      49             :         virtual void visit( FrameElement&, const std::list< Element* >::const_iterator&  ) = 0;
      50             :         virtual void visit( PolyPolyElement&, const std::list< Element* >::const_iterator&  ) = 0;
      51             :         virtual void visit( ImageElement&, const std::list< Element* >::const_iterator&  ) = 0;
      52             :         virtual void visit( PageElement&, const std::list< Element* >::const_iterator&  ) = 0;
      53             :         virtual void visit( DocumentElement&, const std::list< Element* >::const_iterator&  ) = 0;
      54           6 :         virtual ~ElementTreeVisitor() {}
      55             :     };
      56             :     typedef boost::shared_ptr<ElementTreeVisitor> ElementTreeVisitorSharedPtr;
      57             : 
      58             :     /** Visitee interface
      59             : 
      60             :         To be implemented by every tree node that needs to be
      61             :         visitable.
      62             :      */
      63         267 :     struct ElementTreeVisitable
      64             :     {
      65             :         virtual void visitedBy( ElementTreeVisitor&, const std::list< Element* >::const_iterator& rParentIt ) = 0;
      66             : 
      67             :     protected:
      68         267 :         ~ElementTreeVisitable() {}
      69             :     };
      70             :     typedef boost::shared_ptr<ElementTreeVisitable> ElementTreeVisitableSharedPtr;
      71             : }
      72             : 
      73             : #endif
      74             : 
      75             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */