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+/*  -*- mode: C++; c-file-style: "gnu" -*-
+ *
+ *  This file is part of KMail, the KDE mail client.
+ *  Copyright (c) 2003 Carsten Burghardt <burghardt@kde.org>
+ *
+ *  KMail is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License, version 2, as
+ *  published by the Free Software Foundation.
+ *
+ *  KMail 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
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *  In addition, as a special exception, the copyright holders give
+ *  permission to link the code of this program with any edition of
+ *  the Qt library by Trolltech AS, Norway (or with modified versions
+ *  of Qt that use the same license as Qt), and distribute linked
+ *  combinations including the two.  You must obey the GNU General
+ *  Public License in all respects for all of the code used other than
+ *  Qt.  If you modify this file, you may extend this exception to
+ *  your version of the file, but you are not obligated to do so.  If
+ *  you do not wish to do so, delete this exception statement from
+ *  your version.
+ */
+
+#ifndef bodyiterator_h
+#define bodyiterator_h
+
+#include <qptrlist.h>
+#include <qstringlist.h>
+
+class KMMessagePart;
+
+namespace KMail {
+
+  class AttachmentStrategy;
+
+  // Base class
+  class BodyVisitor
+  {
+    public:
+      BodyVisitor();
+      virtual ~BodyVisitor();
+
+      /** Register the parts that should be visited */
+      void visit( KMMessagePart * part );
+      void visit( QPtrList<KMMessagePart> & list );
+
+      /** Returns a list of parts that should be loaded */
+      QPtrList<KMMessagePart> partsToLoad();
+
+      /** Decides whether a part should be loaded.
+          This needs to be implemented by a subclass */
+      virtual bool addPartToList( KMMessagePart * part ) = 0;
+
+    protected:
+      /** 
+       * Checks if one of the parents needs loaded children
+       * This is e.g. needed for multipart/signed where all parts have to be loaded 
+       */
+      static bool parentNeedsLoading( KMMessagePart * part );
+      
+    protected:
+      QPtrList<KMMessagePart> mParts;
+      QStringList mBasicList;
+  };
+
+  // Factory to create a visitor according to the Attachment Strategy 
+  class BodyVisitorFactory
+  {
+    public:
+      static BodyVisitor* getVisitor( const AttachmentStrategy* strategy );
+  };
+
+  // Visitor for smart attachment display
+  class BodyVisitorSmart: public BodyVisitor
+  {
+    public:
+      BodyVisitorSmart();
+
+      bool addPartToList( KMMessagePart * part );
+  };
+  
+  // Visitor for inline attachment display
+  class BodyVisitorInline: public BodyVisitor
+  {
+    public:
+      BodyVisitorInline();
+
+      bool addPartToList( KMMessagePart * part );
+  };
+  
+  // Visitor for hidden attachment display
+  class BodyVisitorHidden: public BodyVisitor
+  {
+    public:
+      BodyVisitorHidden();
+
+      bool addPartToList( KMMessagePart * part );
+  };
+
+}
+
+#endif