1 files changed, 156 insertions, 0 deletions
diff --git a/korganizer/history.h b/korganizer/history.h
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+++ b/korganizer/history.h
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+/*
+    This file is part of KOrganizer.
+
+    Copyright (c) 2003 Cornelius Schumacher <schumacher@kde.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program 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.
+
+    As a special exception, permission is given to link this program
+    with any edition of Qt, and distribute the resulting executable,
+    without including the source code for Qt in the source distribution.
+*/
+#ifndef KORG_HISTORY_H
+#define KORG_HISTORY_H
+
+#include <qobject.h>
+#include <qptrlist.h>
+
+namespace KCal {
+
+class Calendar;
+class Incidence;
+
+}
+
+namespace KOrg {
+
+class History : public QObject
+{
+    Q_OBJECT
+  public:
+    History( KCal::Calendar * );
+
+    void recordDelete( KCal::Incidence * );
+    void recordAdd( KCal::Incidence * );
+    void recordEdit( KCal::Incidence *oldIncidence,
+                     KCal::Incidence *newIncidence );
+    void startMultiModify( const QString &description );
+    void endMultiModify();
+
+  public slots:
+    void undo();
+    void redo();
+
+  signals:
+    void undone();
+    void redone();
+
+    void undoAvailable( const QString & );
+    void redoAvailable( const QString & );
+
+  protected:
+    void truncate();
+
+  private:
+  
+    class Entry
+    {
+      public:
+        Entry( KCal::Calendar * );
+        virtual ~Entry();
+    
+        virtual void undo() = 0;
+        virtual void redo() = 0;
+
+        virtual QString text() = 0;
+
+      protected:
+        KCal::Calendar *mCalendar;
+    };
+
+    class EntryDelete : public Entry
+    {
+      public:
+        EntryDelete( KCal::Calendar *, KCal::Incidence * );
+        ~EntryDelete();
+        
+        void undo();
+        void redo();
+    
+        QString text();
+    
+      private:
+        KCal::Incidence *mIncidence;
+    };
+
+    class EntryAdd : public Entry
+    {
+      public:
+        EntryAdd( KCal::Calendar *, KCal::Incidence * );
+        ~EntryAdd();
+        
+        void undo();
+        void redo();
+
+        QString text();
+
+      private:
+        KCal::Incidence *mIncidence;
+    };
+    
+    class EntryEdit : public Entry
+    {
+      public:
+        EntryEdit( KCal::Calendar *calendar, KCal::Incidence *oldIncidence,
+                   KCal::Incidence *newIncidence );
+        ~EntryEdit();
+        
+        void undo();
+        void redo();
+      
+        QString text();
+      
+      private:
+        KCal::Incidence *mOldIncidence;
+        KCal::Incidence *mNewIncidence;
+    };
+
+    class MultiEntry : public Entry
+    {
+      public:
+        MultiEntry( KCal::Calendar *calendar, const QString &text );
+        ~MultiEntry();
+        
+        void appendEntry( Entry* entry );
+        void undo();
+        void redo();
+      
+        QString text();
+      
+      private:
+        QPtrList<Entry> mEntries;
+        QString mText;
+    };
+
+    KCal::Calendar *mCalendar;
+    MultiEntry *mCurrentMultiEntry;
+
+    QPtrList<Entry> mEntries;
+    QPtrListIterator<Entry> mUndoEntry;
+    QPtrListIterator<Entry> mRedoEntry;
+};
+
+}
+#endif