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diff --git a/kmail/messageproperty.h b/kmail/messageproperty.h
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+/*  Message Property
+
+    This file is part of KMail, the KDE mail client.
+    Copyright (c) Don Sanders <sanders@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 messageproperty_h
+#define messageproperty_h
+
+#include "kmfilteraction.h" // for KMFilterAction::ReturnCode
+#include "kmfolder.h"
+
+#include <qptrlist.h>
+#include <qguardedptr.h>
+#include <qobject.h>
+
+class KMFilter;
+class KMFilterDlg;
+
+namespace KMail {
+
+class ActionScheduler;
+
+/* A place to store properties that some but not necessarily all messages
+   have.
+
+   These properties do not need to be stored persistantly on disk but
+   rather only are required while KMail is running.
+
+   Furthermore some properties, namely complete, transferInProgress, and
+   serialCache should only exist during the lifetime of a particular
+   KMMsgBase based instance.
+ */
+class MessageProperty : public QObject
+{
+  Q_OBJECT
+
+public:
+  /** If the message is being filtered  */
+  static bool filtering( Q_UINT32 );
+  static void setFiltering( Q_UINT32, bool filtering );
+  static bool filtering( const KMMsgBase* );
+  static void setFiltering( const KMMsgBase*, bool filtering );
+  /** The folder this message is to be moved into once
+      filtering is finished, or null if the message is not
+      scheduled to be moved */
+  static KMFolder* filterFolder( Q_UINT32 );
+  static void setFilterFolder( Q_UINT32, KMFolder* folder );
+  static KMFolder* filterFolder( const KMMsgBase* );
+  static void setFilterFolder( const KMMsgBase*, KMFolder* folder );
+  /* Set the filterHandler for a message */
+  static ActionScheduler* filterHandler( Q_UINT32 );
+  static void setFilterHandler( Q_UINT32, ActionScheduler* filterHandler );
+  static ActionScheduler* filterHandler( const KMMsgBase* );
+  static void setFilterHandler( const KMMsgBase*, ActionScheduler* filterHandler );
+
+  /* Caches the serial number for a message, or more correctly for a
+     KMMsgBase based instance representing a message.
+     This property becomes invalid when the message is destructed or
+     assigned a new value */
+  static void setSerialCache( const KMMsgBase*, Q_UINT32 );
+  static Q_UINT32 serialCache( const KMMsgBase* );
+
+  /* Set the transferInProgress for a message
+     This property becomes invalid when the message is destructed or
+     assigned a new value */
+  static void setTransferInProgress( const KMMsgBase*, bool, bool = false );
+  static bool transferInProgress( const KMMsgBase* );
+  static void setTransferInProgress( Q_UINT32, bool, bool = false );
+  static bool transferInProgress( Q_UINT32 );
+  /** Some properties, namely complete, transferInProgress, and
+      serialCache must be forgotten when a message class instance is
+      destructed or assigned a new value */
+  static void forget( const KMMsgBase* );
+
+private:
+  // The folder a message is to be moved into once filtering is finished if any
+  static QMap<Q_UINT32, QGuardedPtr<KMFolder> > sFolders;
+  // The action scheduler currently processing a message if any
+  static QMap<Q_UINT32, QGuardedPtr<ActionScheduler> > sHandlers;
+  // The transferInProgres state of a message if any.
+  static QMap<Q_UINT32, int > sTransfers;
+  // The cached serial number of a message if any.
+  static QMap<const KMMsgBase*, long > sSerialCache;
+};
+
+}
+
+#endif /*messageproperty_h*/