konq_undo.h

00001 /* This file is part of the KDE project
00002    Copyright (C) 2000 Simon Hausmann <hausmann@kde.org>
00003 
00004    This library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License as published by the Free Software Foundation; either
00007    version 2 of the License, or (at your option) any later version.
00008 
00009    This library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Library General Public License for more details.
00013 
00014    You should have received a copy of the GNU Library General Public License
00015    along with this library; see the file COPYING.LIB.  If not, write to
00016    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017    Boston, MA 02110-1301, USA.
00018 */
00019 #ifndef __konq_undo_h__
00020 #define __konq_undo_h__
00021 
00022 #include <qobject.h>
00023 #include <qstring.h>
00024 #include <qvaluestack.h>
00025 
00026 #include <dcopobject.h>
00027 
00028 #include <kurl.h>
00029 #include <libkonq_export.h>
00030 
00031 namespace KIO
00032 {
00033   class Job;
00034 }
00035 
00036 class KonqUndoJob;
00037 
00038 struct KonqBasicOperation
00039 {
00040   typedef QValueStack<KonqBasicOperation> Stack;
00041 
00042   KonqBasicOperation()
00043   { m_valid = false; }
00044 
00045   bool m_valid;
00046   bool m_directory;
00047   bool m_renamed;
00048   bool m_link;
00049   KURL m_src;
00050   KURL m_dst;
00051   QString m_target;
00052 };
00053 
00054 struct KonqCommand
00055 {
00056   typedef QValueStack<KonqCommand> Stack;
00057 
00058   enum Type { COPY, MOVE, LINK, MKDIR, TRASH };
00059 
00060   KonqCommand()
00061   { m_valid = false; }
00062 
00063   bool m_valid;
00064 
00065   Type m_type;
00066   KonqBasicOperation::Stack m_opStack;
00067   KURL::List m_src;
00068   KURL m_dst;
00069 };
00070 
00071 class KonqCommandRecorder : public QObject
00072 {
00073   Q_OBJECT
00074 public:
00075   KonqCommandRecorder( KonqCommand::Type op, const KURL::List &src, const KURL &dst, KIO::Job *job );
00076   virtual ~KonqCommandRecorder();
00077 
00078 private slots:
00079   void slotResult( KIO::Job *job );
00080 
00081   void slotCopyingDone( KIO::Job *, const KURL &from, const KURL &to, bool directory, bool renamed );
00082   void slotCopyingLinkDone( KIO::Job *, const KURL &from, const QString &target, const KURL &to );
00083 
00084 private:
00085   class KonqCommandRecorderPrivate;
00086   KonqCommandRecorderPrivate *d;
00087 };
00088 
00089 class LIBKONQ_EXPORT KonqUndoManager : public QObject, public DCOPObject
00090 {
00091   Q_OBJECT
00092   K_DCOP
00093   friend class KonqUndoJob;
00094 public:
00095   enum UndoState { MAKINGDIRS, MOVINGFILES, REMOVINGDIRS, REMOVINGFILES };
00096 
00097   KonqUndoManager();
00098   virtual ~KonqUndoManager();
00099 
00100   static void incRef();
00101   static void decRef();
00102   static KonqUndoManager *self();
00103 
00104   void addCommand( const KonqCommand &cmd );
00105 
00106   bool undoAvailable() const;
00107   QString undoText() const;
00108 
00109 public slots:
00110   void undo();
00111 
00112 signals:
00113   void undoAvailable( bool avail );
00114   void undoTextChanged( const QString &text );
00115 
00116 protected:
00120   void stopUndo( bool step );
00121 
00122 private:
00123 k_dcop:
00124   virtual ASYNC push( const KonqCommand &cmd );
00125   virtual ASYNC pop();
00126   virtual ASYNC lock();
00127   virtual ASYNC unlock();
00128 
00129   virtual KonqCommand::Stack get() const;
00130 
00131 private slots:
00132   void slotResult( KIO::Job *job );
00133 
00134 private:
00135   void undoStep();
00136 
00137   void undoMakingDirectories();
00138   void undoMovingFiles();
00139   void undoRemovingFiles();
00140   void undoRemovingDirectories();
00141 
00142   void broadcastPush( const KonqCommand &cmd );
00143   void broadcastPop();
00144   void broadcastLock();
00145   void broadcastUnlock();
00146 
00147   void addDirToUpdate( const KURL& url );
00148   bool initializeFromKDesky();
00149 
00150   class KonqUndoManagerPrivate;
00151   KonqUndoManagerPrivate *d;
00152   static KonqUndoManager *s_self;
00153   static unsigned long s_refCnt;
00154 };
00155 
00156 QDataStream &operator<<( QDataStream &stream, const KonqBasicOperation &op );
00157 QDataStream &operator>>( QDataStream &stream, KonqBasicOperation &op );
00158 
00159 QDataStream &operator<<( QDataStream &stream, const KonqCommand &cmd );
00160 QDataStream &operator>>( QDataStream &stream, KonqCommand &cmd );
00161 
00162 #endif
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