UndoBuffer.h

// UndoBuffer.h

#ifndef UndoBuffer_h
#define UndoBuffer_h

#include "CharChange.h"
#include "CharSelection.h"
#include <vector>

class CharBuffer;

class UndoChange
{
public:
	CharChange    change;
	CharSelection selection;
};

//class UndoAction
//{
//public:
//	enum Type { insertion, deletion };
//
//	UndoAction( Type type, size_t pos, size_t count, size_t savedTextPos );
//
//	Type   type;
//	size_t pos;
//	size_t count;
//	size_t savedTextPos;
//};
//
//class UndoGroup
//{
//public:
//	UndoGroup( CharRange selection );
//
//	void RecordInsertion( CharBuffer&, size_t pos, size_t length, size_t savedTextPos );
//	void RecordDeletion ( CharBuffer&, size_t pos, size_t length, size_t savedTextPos );
//
//	UndoChange Undo( CharBuffer&, UTF16Ref savedText ) const;
//	CharChange Redo( CharBuffer&, UTF16Ref savedText ) const;
//
//private:
//	std::vector<UndoAction> m_actions;
//	CharRange m_selection;
//};

class UndoBuffer
{
public:
	UndoBuffer( CharBuffer& );

	bool CanUndo() const { return false; }
	bool CanRedo() const { return false; }

	//UndoChange Undo( CharBuffer& );
	//CharChange Redo( CharBuffer& );

private:
	CharBuffer& m_charBuffer;

	//bool m_endCurrentGroup;
	//size_t m_index;
};

#endif