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+/*
+ This file is part of KMail
+
+ Copyright (C) 1999 Waldo Bastian (bastian@kde.org)
+ Copyright (c) 2003 Zack Rusin <zack@kde.org>
+
+ This library 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.
+
+ This software 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 library; see the file COPYING. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#ifndef UNDOSTACK_H
+#define UNDOSTACK_H
+
+#include <qptrlist.h>
+#include <qstring.h>
+#include <qobject.h>
+
+class KMFolder;
+class KMMsgBase;
+
+namespace KMail {
+
+/** A class for storing Undo information. */
+class UndoInfo
+{
+public:
+ int id;
+ QValueList<ulong> serNums;
+ KMFolder *srcFolder;
+ KMFolder *destFolder;
+};
+
+class UndoStack : public QObject
+{
+ Q_OBJECT
+
+public:
+ UndoStack(int size);
+
+ void clear();
+ int size() const { return mStack.count(); }
+ int newUndoAction( KMFolder* srcFolder, KMFolder* destFolder );
+ void addMsgToAction( int undoId, ulong serNum );
+ void undo();
+
+ void pushSingleAction(ulong serNum, KMFolder *folder, KMFolder* destFolder);
+ void msgDestroyed( KMMsgBase *msg);
+ void folderDestroyed( KMFolder *folder);
+protected:
+ QPtrList<UndoInfo> mStack;
+ int mSize;
+ int mLastId;
+ UndoInfo *mCachedInfo;
+
+signals:
+ void undoStackChanged();
+};
+
+}
+
+#endif