LinuxKeyboard.h

/*
The zlib/libpng License

Copyright (c) 2005-2007 Phillip Castaneda (pjcast -- www.wreckedgames.com)

This software is provided 'as-is', without any express or implied warranty. In no event will
the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial
applications, and to alter it and redistribute it freely, subject to the following
restrictions:

    1. The origin of this software must not be misrepresented; you must not claim that
		you wrote the original software. If you use this software in a product,
		an acknowledgment in the product documentation would be appreciated but is
		not required.

    2. Altered source versions must be plainly marked as such, and must not be
		misrepresented as being the original software.

    3. This notice may not be removed or altered from any source distribution.
*/
#ifndef _LINUX_KEYBOARD_H_EADER_
#define _LINUX_KEYBOARD_H_EADER_

#include "linux/LinuxPrereqs.h"
#include "OISKeyboard.h"
#include <X11/Xlib.h>

namespace OIS
{
	/** Linux implementation of Keyboard object - uses x11 */
	class LinuxKeyboard : public Keyboard
	{
	public:
		LinuxKeyboard(InputManager* creator, bool buffered, bool grab);
		virtual ~LinuxKeyboard();

		/** @copydoc Keyboard::isKeyDown */
		virtual bool isKeyDown( KeyCode key ) const;

		/** @copydoc Keyboard::getAsString */
		virtual const std::string& getAsString( KeyCode kc );

		/** @copydoc Keyboard::copyKeyStates */
		virtual void copyKeyStates( char keys[256] ) const;

		/** @copydoc Object::setBuffered */
		virtual void setBuffered(bool buffered);

		/** @copydoc Object::capture */
		virtual void capture();

		/** @copydoc Object::queryInterface */
		virtual Interface* queryInterface(Interface::IType) {return 0;}

		/** @copydoc Object::_initialize */
		virtual void _initialize();

	protected:
		inline bool _isKeyRepeat(XEvent &event)
		{
			//When a key is repeated, there will be two events: released, followed by another immediate pressed. So check to see if another pressed is present
			if(!XPending(display))
				return false;

			XEvent e;
			XPeekEvent(display, &e);
			if(e.type == KeyPress && e.xkey.keycode == event.xkey.keycode && (e.xkey.time - event.xkey.time) < 2)
			{
				XNextEvent(display, &e);
				return true;
			}

			return false;
		}

		bool _injectKeyDown( KeySym key, int text );
		bool _injectKeyUp( KeySym key );

		//! 1:1 Conversion Map between X Key Events and OIS KeyCodes
		typedef std::map<KeySym, KeyCode> XtoOIS_KeyMap;
		XtoOIS_KeyMap keyConversion;

		//! Depressed Key List
		char KeyBuffer[256];

		//! X11 Stuff
		Window window;
		Display *display;
		bool grabKeyboard;
		bool keyFocusLost;

		std::string mGetString;
	};
}

#endif //_LINUX_KEYBOARD_H_EADER_