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diff --git a/libkcal/incidenceformatter.h b/libkcal/incidenceformatter.h
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+++ b/libkcal/incidenceformatter.h
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+/*
+    This file is part of libkcal.
+
+    Copyright (c) 2001-2003 Cornelius Schumacher <schumacher@kde.org>
+    Copyright (c) 2004 Reinhold Kainhofer <reinhold@kainhofer.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 KCAL_INCIDENCEFORMATTER_H
+#define KCAL_INCIDENCEFORMATTER_H
+
+#include <qstring.h>
+
+#include "libkcal_export.h"
+
+namespace KCal {
+class Calendar;
+class Incidence;
+class IncidenceBase;
+
+class LIBKCAL_EXPORT InvitationFormatterHelper
+{
+  public:
+    virtual QString generateLinkURL( const QString &id ) { return id; }
+    virtual QString makeLink( const QString &id, const QString &text );
+    virtual Calendar* calendar() const { return 0; }
+};
+
+/**
+  This class is a helper class that provides several static methods to format an Incidence
+  into different formats, like an HTML representation for KMail, a representation for tool tips,
+  or a representation for the event viewer.
+
+  @short methods to format incidences into various formats for displaying them
+*/
+class LIBKCAL_EXPORT IncidenceFormatter
+{
+  public:
+    static QString toolTipString( IncidenceBase *incidence, bool richText = true );
+    static QString mailBodyString( IncidenceBase *incidencebase );
+    static QString extensiveDisplayString( IncidenceBase *incidence );
+
+    static QString formatICalInvitation( QString invitation, Calendar *mCalendar,
+                                         InvitationFormatterHelper *helper );
+    // Format a TNEF attachment to an HTML mail
+    static QString formatTNEFInvitation( const QByteArray& tnef,
+                                         Calendar *mCalendar,
+                                         InvitationFormatterHelper *helper );
+    // Transform a TNEF attachment to an iCal or vCard
+    static QString msTNEFToVPart( const QByteArray& tnef );
+
+    static QString recurrenceString( Incidence *incidence );
+  private:
+    class EventViewerVisitor;
+    class ScheduleMessageVisitor;
+    class InvitationHeaderVisitor;
+    class InvitationBodyVisitor;
+    class IncidenceCompareVisitor;
+    class ToolTipVisitor;
+    class MailBodyVisitor;
+};
+
+}
+
+#endif