/*
Copyright 1997 David Coppit.  Permission to use and modify this code for
research purposes is granted to provided that this copyright statement retained
in all derivative software.

Many thanks to Dietmar Kuehl <Dietmar.Kuehl@uni-konstanz.de> for his help.
Some of this code is based on his streams examples at:
http://www.informatik.uni-konstanz.de/~kuehl/c++/iostream/

This file, along with winbuff.cpp, PromptDialog.h, and PromptDialog.cpp
implement a Windows MFC compatible text-based input window for cout and cin.  A
tutorial and more information can be found at
http://www.coppit.org/soft_eng/winbuf/index.html
*/

#ifndef WINBUF_H
#define WINBUF_H

#include <iostream.h>

class PromptDialog;

class winBuf: public streambuf
{
private:
	PromptDialog* m_dialog;  // the I/O Dialog Box
	void put_buffer(void);
	void put_char(int);
	int get_buffer();

	// This variable says whether a new line of input is necessary.
	int needInput;
	// One can temporarily disable output if needed.
	int outputEnabled;

protected:
  int       overflow(int);
  int       underflow();
  int       uflow();
  int       sync();

public:
	winBuf(PromptDialog *, int = 0, int = 0);
	~winBuf();
	void enableOutput();
	void disableOutput();
};

class winErr: public streambuf
{
private:
	void put_char(int);
	char* errorBuffer;
	unsigned int m_bufferSize;

protected:
  int       overflow(int);
  int       underflow();
  int       sync();

public:
	winErr(int);
	~winErr();
};

class inWinStream: public istream
{
public:
  inWinStream(PromptDialog *, int = 256);
  ~inWinStream();
private:
  winBuf *theWinBuf;
};

class outWinStream: public ostream
{
public:
  outWinStream(PromptDialog*, int = 256);
  ~outWinStream();
private:
  winBuf *theWinBuf;
};

class errWinStream: public ostream
{
public:
  errWinStream(int = 256);
  ~errWinStream();
private:
  winErr *theWinErr;
};


#endif /* WINBUF_H */