/*
 *  Console.h - console utilities for Aleph One

	Copyright (C) 2005 and beyond by Gregory Smith
	and the "Aleph One" developers.
 
	This program 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.

	This program 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.

	This license is contained in the file "COPYING",
	which is included with this source code; it is available online at
	http://www.gnu.org/licenses/gpl.html

*/

#ifndef CONSOLE_H
#define CONSOLE_H

#include <string>
#include <map>
#include <boost/function.hpp>
#include "XML_ElementParser.h"

class CommandParser
{
public:
	CommandParser() { }
	~CommandParser() { }
	void register_command(std::string command, boost::function<void(const std::string&)> f);
	void register_command(std::string command, const CommandParser& command_parser);
	void unregister_command(std::string command);

	virtual void parse_and_execute(const std::string& command_string);
private:
	typedef std::map<std::string, boost::function<void(const std::string&)> > command_map;
	command_map m_commands;
};

class Console : public CommandParser
{
public:
	static Console* instance();

	// called by key handlers
	void enter();
	void abort(); // callback is called with empty string
	void backspace();
	void clear();
	void key(const char);
	const std::string &displayBuffer() { return m_displayBuffer; }

	void activate_input(boost::function<void (const std::string&)> callback,
			    const std::string& prompt);
	void deactivate_input(); // like abort, but no callback

	bool input_active() { return m_active; }

	void register_macro(std::string macro, std::string replacement);
	void unregister_macro(std::string macro);

private:
	Console() : m_active(false) { } ;
	static Console* m_instance;

	boost::function<void (std::string)> m_callback;
	std::string m_buffer;
	std::string m_displayBuffer;
	std::string m_prompt;
	bool m_active;

	std::map<std::string, std::string> m_macros;
};

XML_ElementParser *Console_GetParser();

#endif