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/* This file is part of the KDE libraries
Copyright (C) 2001 Christoph Cullmann <[email protected]>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
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 __ktexteditor_undointerface_h__
#define __ktexteditor_undointerface_h__
#include <kdelibs_export.h>
class TQCString;
namespace KTextEditor
{
/**
* This is an interface to undo functionality of a Document.
*/
class KTEXTEDITOR_EXPORT UndoInterface
{
friend class PrivateUndoInterface;
public:
UndoInterface ();
virtual ~UndoInterface ();
unsigned int undoInterfaceNumber () const;
protected:
void setUndoInterfaceDCOPSuffix (const TQCString &suffix);
//
// slots !!!
//
public:
virtual void undo () = 0;
virtual void redo () = 0;
virtual void clearUndo () = 0;
virtual void clearRedo () = 0;
virtual unsigned int undoCount () const = 0;
virtual unsigned int redoCount () const = 0;
/**
returns the maximum of undo steps possible, 0 means no limit !
*/
virtual unsigned int undoSteps () const = 0;
virtual void setUndoSteps ( unsigned int steps ) = 0;
//
// signals !!!
//
public:
virtual void undoChanged () = 0;
private:
class PrivateUndoInterface *d;
static unsigned int globalUndoInterfaceNumber;
unsigned int myUndoInterfaceNumber;
};
KTEXTEDITOR_EXPORT UndoInterface *undoInterface (class Document *doc);
}
#endif
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