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/*
Copyright (C) 2001-2006, William Joseph.
All Rights Reserved.
This file is part of GtkRadiant.
GtkRadiant 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.
GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if !defined (INCLUDED_UNDOLIB_H)
#define INCLUDED_UNDOLIB_H
#include "iundo.h"
#include "mapfile.h"
#include "warnings.h"
#include "generic/callback.h"
template<typename Copyable>
class BasicUndoMemento : public UndoMemento
{
Copyable m_data;
public:
BasicUndoMemento(const Copyable& data)
: m_data(data)
{
}
void release()
{
delete this;
}
const Copyable& get() const
{
return m_data;
}
};
template<typename Copyable>
class ObservedUndoableObject : public Undoable
{
typedef Callback1<const Copyable&> ImportCallback;
Copyable& m_object;
ImportCallback m_importCallback;
UndoObserver* m_undoQueue;
MapFile* m_map;
public:
ObservedUndoableObject<Copyable>(Copyable& object, const ImportCallback& importCallback)
: m_object(object), m_importCallback(importCallback), m_undoQueue(0), m_map(0)
{
}
~ObservedUndoableObject()
{
}
MapFile* map()
{
return m_map;
}
void instanceAttach(MapFile* map)
{
m_map = map;
m_undoQueue = GlobalUndoSystem().observer(this);
}
void instanceDetach(MapFile* map)
{
m_map = 0;
m_undoQueue = 0;
GlobalUndoSystem().release(this);
}
void save()
{
if(m_map != 0)
{
m_map->changed();
}
if(m_undoQueue != 0)
{
m_undoQueue->save(this);
}
}
UndoMemento* exportState() const
{
return new BasicUndoMemento<Copyable>(m_object);
}
void importState(const UndoMemento* state)
{
save();
m_importCallback((static_cast<const BasicUndoMemento<Copyable>*>(state))->get());
}
};
template<typename Copyable>
class UndoableObject : public Undoable
{
Copyable& m_object;
UndoObserver* m_undoQueue;
MapFile* m_map;
public:
UndoableObject(Copyable& object)
: m_object(object), m_undoQueue(0), m_map(0)
{}
~UndoableObject()
{
}
void instanceAttach(MapFile* map)
{
m_map = map;
m_undoQueue = GlobalUndoSystem().observer(this);
}
void instanceDetach(MapFile* map)
{
m_map = 0;
m_undoQueue = 0;
GlobalUndoSystem().release(this);
}
void save()
{
if(m_map != 0)
{
m_map->changed();
}
if(m_undoQueue != 0)
{
m_undoQueue->save(this);
}
}
UndoMemento* exportState() const
{
return new BasicUndoMemento<Copyable>(m_object);
}
void importState(const UndoMemento* state)
{
save();
m_object = (static_cast<const BasicUndoMemento<Copyable>*>(state))->get();
}
};
#endif
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