dhewm3/neo/framework/KeyInput.cpp

/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.

This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").

Doom 3 Source Code 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 3 of the License, or
(at your option) any later version.

Doom 3 Source Code 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 Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "sys/platform.h"
#include "idlib/Str.h"
#include "idlib/LangDict.h"
#include "framework/Common.h"
#include "framework/File.h"
#include "framework/UsercmdGen.h"
#include "sys/sys_public.h"

#include "framework/KeyInput.h"

typedef struct {
	const char	*name;
	int		keynum;
	const char	*strId;	// localized string id
} keyname_t;

// keys that can be set without a special name
static const char unnamedkeys[] = "*,-=./[\\]1234567890abcdefghijklmnopqrstuvwxyz";

#if MACOS_X
const char* OSX_GetLocalizedString( const char* );
#endif

// names not in this list can either be lowercase ascii, or '0xnn' hex sequences
static const keyname_t keynames[] =
{
	{"TAB",				K_TAB,				"#str_07018"},
	{"ENTER",			K_ENTER,			"#str_07019"},
	{"ESCAPE",			K_ESCAPE,			"#str_07020"},
	{"SPACE",			K_SPACE,			"#str_07021"},
	{"BACKSPACE",		K_BACKSPACE,		"#str_07022"},
	{"UPARROW",			K_UPARROW,			"#str_07023"},
	{"DOWNARROW",		K_DOWNARROW,		"#str_07024"},
	{"LEFTARROW",		K_LEFTARROW,		"#str_07025"},
	{"RIGHTARROW",		K_RIGHTARROW,		"#str_07026"},

	{"ALT",				K_ALT,				"#str_07027"},
	//{"RIGHTALT",		K_RIGHT_ALT,		"#str_07027"}, // DG: renamed this, see below
	{"CTRL",			K_CTRL,				"#str_07028"},
	{"SHIFT",			K_SHIFT,			"#str_07029"},

	{"LWIN",			K_LWIN,				"#str_07030"},
	{"RWIN",			K_RWIN,				"#str_07031"},
	{"MENU",			K_MENU,				"#str_07032"},

	{"COMMAND",			K_COMMAND,			"#str_07033"},

	{"CAPSLOCK",		K_CAPSLOCK,			"#str_07034"},
	{"SCROLL",			K_SCROLL,			"#str_07035"},
	{"PRINTSCREEN",		K_PRINT_SCR,		"#str_07179"},

	{"F1",				K_F1,				"#str_07036"},
	{"F2",				K_F2,				"#str_07037"},
	{"F3",				K_F3,				"#str_07038"},
	{"F4",				K_F4,				"#str_07039"},
	{"F5",				K_F5,				"#str_07040"},
	{"F6",				K_F6,				"#str_07041"},
	{"F7",				K_F7,				"#str_07042"},
	{"F8",				K_F8,				"#str_07043"},
	{"F9",				K_F9,				"#str_07044"},
	{"F10",				K_F10,				"#str_07045"},
	{"F11",				K_F11,				"#str_07046"},
	{"F12",				K_F12,				"#str_07047"},

	{"INS",				K_INS,				"#str_07048"},
	{"DEL",				K_DEL,				"#str_07049"},
	{"PGDN",			K_PGDN,				"#str_07050"},
	{"PGUP",			K_PGUP,				"#str_07051"},
	{"HOME",			K_HOME,				"#str_07052"},
	{"END",				K_END,				"#str_07053"},

	{"MOUSE1",			K_MOUSE1,			"#str_07054"},
	{"MOUSE2",			K_MOUSE2,			"#str_07055"},
	{"MOUSE3",			K_MOUSE3,			"#str_07056"},
	{"MOUSE4",			K_MOUSE4,			"#str_07057"},
	{"MOUSE5",			K_MOUSE5,			"#str_07058"},
	{"MOUSE6",			K_MOUSE6,			"#str_07059"},
	{"MOUSE7",			K_MOUSE7,			"#str_07060"},
	{"MOUSE8",			K_MOUSE8,			"#str_07061"},

	{"MWHEELUP",		K_MWHEELUP,			"#str_07131"},
	{"MWHEELDOWN",		K_MWHEELDOWN,		"#str_07132"},

	{"JOY1",			K_JOY1,				"#str_07062"},
	{"JOY2",			K_JOY2,				"#str_07063"},
	{"JOY3",			K_JOY3,				"#str_07064"},
	{"JOY4",			K_JOY4,				"#str_07065"},
	{"JOY5",			K_JOY5,				"#str_07066"},
	{"JOY6",			K_JOY6,				"#str_07067"},
	{"JOY7",			K_JOY7,				"#str_07068"},
	{"JOY8",			K_JOY8,				"#str_07069"},
	{"JOY9",			K_JOY9,				"#str_07070"},
	{"JOY10",			K_JOY10,			"#str_07071"},
	{"JOY11",			K_JOY11,			"#str_07072"},
	{"JOY12",			K_JOY12,			"#str_07073"},
	{"JOY13",			K_JOY13,			"#str_07074"},
	{"JOY14",			K_JOY14,			"#str_07075"},
	{"JOY15",			K_JOY15,			"#str_07076"},
	{"JOY16",			K_JOY16,			"#str_07077"},
	{"JOY17",			K_JOY17,			"#str_07078"},
	{"JOY18",			K_JOY18,			"#str_07079"},
	{"JOY19",			K_JOY19,			"#str_07080"},
	{"JOY20",			K_JOY20,			"#str_07081"},
	{"JOY21",			K_JOY21,			"#str_07082"},
	{"JOY22",			K_JOY22,			"#str_07083"},
	{"JOY23",			K_JOY23,			"#str_07084"},
	{"JOY24",			K_JOY24,			"#str_07085"},
	{"JOY25",			K_JOY25,			"#str_07086"},
	{"JOY26",			K_JOY26,			"#str_07087"},
	{"JOY27",			K_JOY27,			"#str_07088"},
	{"JOY28",			K_JOY28,			"#str_07089"},
	{"JOY29",			K_JOY29,			"#str_07090"},
	{"JOY30",			K_JOY30,			"#str_07091"},
	{"JOY31",			K_JOY31,			"#str_07092"},
	{"JOY32",			K_JOY32,			"#str_07093"},

	{"AUX1",			K_AUX1,				"#str_07094"},
	{"AUX2",			K_AUX2,				"#str_07095"},
	{"AUX3",			K_AUX3,				"#str_07096"},
	{"AUX4",			K_AUX4,				"#str_07097"},
	{"AUX5",			K_AUX5,				"#str_07098"},
	{"AUX6",			K_AUX6,				"#str_07099"},
	{"AUX7",			K_AUX7,				"#str_07100"},
	{"AUX8",			K_AUX8,				"#str_07101"},
	{"AUX9",			K_AUX9,				"#str_07102"},
	{"AUX10",			K_AUX10,			"#str_07103"},
	{"AUX11",			K_AUX11,			"#str_07104"},
	{"AUX12",			K_AUX12,			"#str_07105"},
	{"AUX13",			K_AUX13,			"#str_07106"},
	{"AUX14",			K_AUX14,			"#str_07107"},
	{"AUX15",			K_AUX15,			"#str_07108"},
	{"AUX16",			K_AUX16,			"#str_07109"},

	{"KP_HOME",			K_KP_HOME,			"#str_07110"},
	{"KP_UPARROW",		K_KP_UPARROW,		"#str_07111"},
	{"KP_PGUP",			K_KP_PGUP,			"#str_07112"},
	{"KP_LEFTARROW",	K_KP_LEFTARROW,		"#str_07113"},
	{"KP_5",			K_KP_5,				"#str_07114"},
	{"KP_RIGHTARROW",	K_KP_RIGHTARROW,	"#str_07115"},
	{"KP_END",			K_KP_END,			"#str_07116"},
	{"KP_DOWNARROW",	K_KP_DOWNARROW,		"#str_07117"},
	{"KP_PGDN",			K_KP_PGDN,			"#str_07118"},
	{"KP_ENTER",		K_KP_ENTER,			"#str_07119"},
	{"KP_INS",			K_KP_INS,			"#str_07120"},
	{"KP_DEL",			K_KP_DEL,			"#str_07121"},
	{"KP_SLASH",		K_KP_SLASH,			"#str_07122"},
	{"KP_MINUS",		K_KP_MINUS,			"#str_07123"},
	{"KP_PLUS",			K_KP_PLUS,			"#str_07124"},
	{"KP_NUMLOCK",		K_KP_NUMLOCK,		"#str_07125"},
	{"KP_STAR",			K_KP_STAR,			"#str_07126"},
	{"KP_EQUALS",		K_KP_EQUALS,		"#str_07127"},

	{"PAUSE",			K_PAUSE,			"#str_07128"},

	{"SEMICOLON",		';',				"#str_07129"},	// because a raw semicolon separates commands
	{"APOSTROPHE",		'\'',				"#str_07130"},	// because a raw apostrophe messes with parsing
	{"QUOTE",			'"',				""}, // DG: raw quote can't be good either

	{"R_ALT",			K_RIGHT_ALT,		""}, // DG: renamed this from RIGHTALT so it's shorter (but discernible) in the menu
	{"R_CTRL",			K_RIGHT_CTRL, 		""}, // DG: added this one
	{"R_SHIFT",			K_RIGHT_SHIFT,		""}, // DG: added this one

	// TODO: controller stuff

	{NULL,				0,					NULL}
};

static const int	MAX_KEYS = K_LAST_KEY+1; // DG: was 256, made it more flexible

class idKey {
public:
					idKey( void ) { down = false; repeats = 0; usercmdAction = 0; }
	bool			down;
	int				repeats;		// if > 1, it is autorepeating
	idStr			binding;
	int				usercmdAction;	// for testing by the asyncronous usercmd generation
};

bool		key_overstrikeMode = false;
idKey *		keys = NULL;

#define ID_DOOM_LEGACY

#ifdef ID_DOOM_LEGACY

static const char *		cheatCodes[] = {
	"iddqd",		// Invincibility
	"idkfa",		// All weapons, keys, ammo, and 200% armor
	"idfa",			// Reset ammunition
	"idspispopd",	// Walk through walls
	"idclip",		// Walk through walls
	"idchoppers",	// Chainsaw
/*
	"idbeholds",	// Berserker strength
	"idbeholdv",	// Temporary invincibility
	"idbeholdi",	// Temporary invisibility
	"idbeholda",	// Full automap
	"idbeholdr",	// Anti-radiation suit
	"idbeholdl",	// Light amplification visor
	"idclev",		// Level select
	"iddt",			// Toggle full map; full map and objects; normal map
	"idmypos",		// Display coordinates and heading
	"idmus",		// Change music to indicated level
	"fhhall",		// Kill all enemies in level
	"fhshh",		// Invisible to enemies until attack
*/
	NULL
};
char		lastKeys[32];
int			lastKeyIndex;

#endif

/*
===================
idKeyInput::ArgCompletion_KeyName
===================
*/
void idKeyInput::ArgCompletion_KeyName( const idCmdArgs &args, void(*callback)( const char *s ) ) {
	const keyname_t *kn;
	int i;

	for( i = 0; i < sizeof( unnamedkeys ) - 1; i++ ) {
		callback( va( "%s %c", args.Argv( 0 ), unnamedkeys[ i ] ) );
	}

	for ( kn = keynames; kn->name; kn++ ) {
		callback( va( "%s %s", args.Argv( 0 ), kn->name ) );
	}

	for( int scKey = K_FIRST_SCANCODE; scKey <= K_LAST_SCANCODE; ++scKey ) {
		const char* scName = Sys_GetScancodeName( scKey );
		if ( scName != NULL ) {
			callback( va( "%s %s", args.Argv( 0 ), scName ) );
		}
	}
}

/*
===================
idKeyInput::GetOverstrikeMode
===================
*/
bool idKeyInput::GetOverstrikeMode( void ) {
	return key_overstrikeMode;
}

/*
===================
idKeyInput::SetOverstrikeMode
===================
*/
void idKeyInput::SetOverstrikeMode( bool state ) {
	key_overstrikeMode = state;
}

/*
===================
idKeyInput::IsDown
===================
*/
bool idKeyInput::IsDown( int keynum ) {
	if ( keynum == -1 ) {
		return false;
	}

	// DG: K_RIGHT_CTRL/SHIFT should be handled as different keys for bindings
	//     but the same for keyboard shortcuts in the console and such
	//     (this function is used for the latter)
	if ( keynum == K_CTRL ) {
		return keys[K_CTRL].down || keys[K_RIGHT_CTRL].down;
	} else if ( keynum == K_SHIFT ) {
		return keys[K_SHIFT].down || keys[K_RIGHT_SHIFT].down;
	}

	return keys[keynum].down;
}

/*
===================
idKeyInput::StringToKeyNum

Returns a key number to be used to index keys[] by looking at
the given string.  Single ascii characters return themselves, while
the K_* names are matched up.

0x11 will be interpreted as raw hex, which will allow new controlers
to be configured even if they don't have defined names.
===================
*/
int idKeyInput::StringToKeyNum( const char *str ) {
	const keyname_t	*kn;

	if ( !str || !str[0] ) {
		return -1;
	}
	if ( !str[1] ) {
		return (unsigned char)(str[0]);
	}

	// check for hex code
	if ( str[0] == '0' && str[1] == 'x' && strlen( str ) == 4 ) {
		int		n1, n2;

		n1 = str[2];
		if ( n1 >= '0' && n1 <= '9' ) {
			n1 -= '0';
		} else if ( n1 >= 'a' && n1 <= 'f' ) {
			n1 = n1 - 'a' + 10;
		} else {
			n1 = 0;
		}

		n2 = str[3];
		if ( n2 >= '0' && n2 <= '9' ) {
			n2 -= '0';
		} else if ( n2 >= 'a' && n2 <= 'f' ) {
			n2 = n2 - 'a' + 10;
		} else {
			n2 = 0;
		}

		return n1 * 16 + n2;
	}

	// DG: scancode names start with "SC_"
	if ( idStr::Icmpn( str, "SC_", 3 ) == 0 ) {
		return Sys_GetKeynumForScancodeName( str );
	}

	// scan for a text match
	for ( kn = keynames; kn->name; kn++ ) {
		if ( !idStr::Icmp( str, kn->name ) ) {
			return kn->keynum;
		}
	}

	return -1;
}

/*
===================
idKeyInput::KeyNumToString

Returns a string (either a single ascii char, a K_* name, or a 0x11 hex string) for the
given keynum.

NOTE: with localized = true, the returned string is only valid until the next call (at least for K_SC_*)!
      (currently this is no problem)
===================
*/
const char *idKeyInput::KeyNumToString( int keynum, bool localized ) {
	const keyname_t	*kn;
	static	char	tinystr[5];
	int			i, j;

	if ( keynum == -1 ) {
		return "<KEY NOT FOUND>";
	}

	if ( keynum < 0 || keynum >= MAX_KEYS ) {
		return "<OUT OF RANGE>";
	}

	// check for printable ascii (don't use quote)
	if ( keynum > 32 && keynum < 127 && keynum != '"' && keynum != ';' && keynum != '\'' ) {
		tinystr[0] = Sys_MapCharForKey( keynum );
		tinystr[1] = 0;
		return tinystr;
	}

	if ( keynum >= K_FIRST_SCANCODE && keynum <= K_LAST_SCANCODE ) {
		const char* scName = NULL;
		if ( localized ) {
			scName = Sys_GetLocalizedScancodeName( keynum );
		} else {
			scName = Sys_GetScancodeName( keynum );
		}
		if ( scName != NULL ) {
			return scName;
		}
	}

	// check for a key string
	for ( kn = keynames; kn->name; kn++ ) {
		if ( keynum == kn->keynum ) {
			if ( !localized || kn->strId[0] != '#' ) {
				return kn->name;
			} else {
#if MACOS_X

				switch ( kn->keynum ) {
					case K_ENTER:
					case K_BACKSPACE:
					case K_ALT:
					case K_INS:
					case K_PRINT_SCR:
						return OSX_GetLocalizedString( kn->name );
						break;
					default :
						return common->GetLanguageDict()->GetString( kn->strId ); break;
				}
#else
				return common->GetLanguageDict()->GetString( kn->strId );
#endif
			}
		}
	}

	// check for European high-ASCII characters
	if ( localized && keynum >= 161 && keynum <= 255 ) {
		tinystr[0] = keynum;
		tinystr[1] = 0;
		return tinystr;
	}

	// make a hex string
	i = keynum >> 4;
	j = keynum & 15;

	tinystr[0] = '0';
	tinystr[1] = 'x';
	tinystr[2] = i > 9 ? i - 10 + 'a' : i + '0';
	tinystr[3] = j > 9 ? j - 10 + 'a' : j + '0';
	tinystr[4] = 0;

	return tinystr;
}

/*
===================
idKeyInput::SetBinding
===================
*/
void idKeyInput::SetBinding( int keynum, const char *binding ) {
	if ( keynum == -1 ) {
		return;
	}

	// Clear out all button states so we aren't stuck forever thinking this key is held down
	usercmdGen->Clear();

	// allocate memory for new binding
	keys[keynum].binding = binding;

	// find the action for the async command generation
	keys[keynum].usercmdAction = usercmdGen->CommandStringUsercmdData( binding );

	// consider this like modifying an archived cvar, so the
	// file write will be triggered at the next oportunity
	cvarSystem->SetModifiedFlags( CVAR_ARCHIVE );
}


/*
===================
idKeyInput::GetBinding
===================
*/
const char *idKeyInput::GetBinding( int keynum ) {
	if ( keynum == -1 ) {
		return "";
	}

	return keys[ keynum ].binding;
}

/*
===================
idKeyInput::GetUsercmdAction
===================
*/
int idKeyInput::GetUsercmdAction( int keynum ) {
	return keys[ keynum ].usercmdAction;
}

/*
===================
Key_Unbind_f
===================
*/
void Key_Unbind_f( const idCmdArgs &args ) {
	int		b;

	if ( args.Argc() != 2 ) {
		common->Printf( "unbind <key> : remove commands from a key\n" );
		return;
	}

	b = idKeyInput::StringToKeyNum( args.Argv(1) );
	if ( b == -1 ) {
		// If it wasn't a key, it could be a command
		if ( !idKeyInput::UnbindBinding( args.Argv(1) ) ) {
			common->Printf( "\"%s\" isn't a valid key\n", args.Argv(1) );
		}
	} else {
		idKeyInput::SetBinding( b, "" );
	}
}

/*
===================
Key_Unbindall_f
===================
*/
void Key_Unbindall_f( const idCmdArgs &args ) {
	int		i;

	for ( i = 0; i < MAX_KEYS; i++ ) {
		idKeyInput::SetBinding( i, "" );
	}
}

/*
===================
Key_Bind_f
===================
*/
void Key_Bind_f( const idCmdArgs &args ) {
	int			i, c, b;
	char		cmd[MAX_STRING_CHARS];

	c = args.Argc();

	if ( c < 2 ) {
		common->Printf( "bind <key> [command] : attach a command to a key\n" );
		return;
	}
	b = idKeyInput::StringToKeyNum( args.Argv(1) );
	if ( b == -1 ) {
		common->Printf( "\"%s\" isn't a valid key\n", args.Argv(1) );
		return;
	}

	if ( c == 2 ) {
		if ( keys[b].binding.Length() ) {
			common->Printf( "\"%s\" = \"%s\"\n", args.Argv(1), keys[b].binding.c_str() );
		}
		else {
			common->Printf( "\"%s\" is not bound\n", args.Argv(1) );
		}
		return;
	}

	// copy the rest of the command line
	cmd[0] = 0;		// start out with a null string
	for ( i = 2; i < c; i++ ) {
		strcat( cmd, args.Argv( i ) );
		if ( i != (c-1) ) {
			strcat( cmd, " " );
		}
	}

	idKeyInput::SetBinding( b, cmd );
}

/*
============
Key_BindUnBindTwo_f

binds keynum to bindcommand and unbinds if there are already two binds on the key
============
*/
void Key_BindUnBindTwo_f( const idCmdArgs &args ) {
	int c = args.Argc();
	if ( c < 3 ) {
		common->Printf( "bindunbindtwo <keynum> [command]\n" );
		return;
	}
	int key = atoi( args.Argv( 1 ) );
	idStr bind = args.Argv( 2 );
	if ( idKeyInput::NumBinds( bind ) >= 2 && !idKeyInput::KeyIsBoundTo( key, bind ) ) {
		idKeyInput::UnbindBinding( bind );
	}
	idKeyInput::SetBinding( key, bind );
}



/*
============
idKeyInput::WriteBindings

Writes lines containing "bind key value"
============
*/
void idKeyInput::WriteBindings( idFile *f ) {
	int		i;

	f->Printf( "unbindall\n" );

	for ( i = 0; i < MAX_KEYS; i++ ) {
		if ( keys[i].binding.Length() ) {
			const char *name = KeyNumToString( i, false );

			// handle the escape character nicely
			if ( !strcmp( name, "\\" ) ) {
				f->Printf( "bind \"\\\" \"%s\"\n", keys[i].binding.c_str() );
			} else {
				f->Printf( "bind \"%s\" \"%s\"\n", KeyNumToString( i, false ), keys[i].binding.c_str() );
			}
		}
	}
}

/*
============
Key_ListBinds_f
============
*/
void Key_ListBinds_f( const idCmdArgs &args ) {
	int		i;

	for ( i = 0; i < MAX_KEYS; i++ ) {
		if ( keys[i].binding.Length() ) {
			common->Printf( "%s \"%s\"\n", idKeyInput::KeyNumToString( i, false ), keys[i].binding.c_str() );
		}
	}
}

/*
============
idKeyInput::KeysFromBinding
returns the localized name of the key for the binding
============
*/
const char *idKeyInput::KeysFromBinding( const char *bind ) {
	int i;
	static char keyName[MAX_STRING_CHARS];

	keyName[0] = '\0';
	if ( bind && *bind ) {
		for ( i = 0; i < MAX_KEYS; i++ ) {
			if ( keys[i].binding.Icmp( bind ) == 0 ) {
				if ( keyName[0] != '\0' ) {
					idStr::Append( keyName, sizeof( keyName ), common->GetLanguageDict()->GetString( "#str_07183" ) );
				}
				idStr::Append( keyName, sizeof( keyName ), KeyNumToString( i, true ) );
			}
		}
	}
	if ( keyName[0] == '\0' ) {
		idStr::Copynz( keyName, common->GetLanguageDict()->GetString( "#str_07133" ), sizeof( keyName ) );
	}
	idStr::ToLower( keyName );
	return keyName;
}

/*
============
idKeyInput::BindingFromKey
returns the binding for the localized name of the key
============
*/
const char *idKeyInput::BindingFromKey( const char *key ) {
	const int keyNum = idKeyInput::StringToKeyNum( key );
	if ( keyNum<0 || keyNum >= MAX_KEYS ) {
		return NULL;
	}
	return keys[keyNum].binding.c_str();
}

/*
============
idKeyInput::UnbindBinding
============
*/
bool idKeyInput::UnbindBinding( const char *binding ) {
	bool unbound = false;
	int i;

	if ( binding && *binding ) {
		for ( i = 0; i < MAX_KEYS; i++ ) {
			if ( keys[i].binding.Icmp( binding ) == 0 ) {
				SetBinding( i, "" );
				unbound = true;
			}
		}
	}
	return unbound;
}

/*
============
idKeyInput::NumBinds
============
*/
int idKeyInput::NumBinds( const char *binding ) {
	int i, count = 0;

	if ( binding && *binding ) {
		for ( i = 0; i < MAX_KEYS; i++ ) {
			if ( keys[i].binding.Icmp( binding ) == 0 ) {
				count++;
			}
		}
	}
	return count;
}

/*
============
idKeyInput::KeyIsBountTo
============
*/
bool idKeyInput::KeyIsBoundTo( int keynum, const char *binding ) {
	if ( keynum >= 0 && keynum < MAX_KEYS ) {
		return ( keys[keynum].binding.Icmp( binding ) == 0 );
	}
	return false;
}

/*
===================
idKeyInput::PreliminaryKeyEvent

Tracks global key up/down state
Called by the system for both key up and key down events
===================
*/
void idKeyInput::PreliminaryKeyEvent( int keynum, bool down ) {
	keys[keynum].down = down;

#ifdef ID_DOOM_LEGACY
	if ( down && keynum < 127 ) { // DG: only ASCII keys are of interest here
		lastKeys[ 0 + ( lastKeyIndex & 15 )] = keynum;
		lastKeys[16 + ( lastKeyIndex & 15 )] = keynum;
		lastKeyIndex = ( lastKeyIndex + 1 ) & 15;
		for ( int i = 0; cheatCodes[i] != NULL; i++ ) {
			int l = strlen( cheatCodes[i] );
			assert( l <= 16 );
			if ( idStr::Icmpn( lastKeys + 16 + ( lastKeyIndex & 15 ) - l, cheatCodes[i], l ) == 0 ) {
				common->Printf( "your memory serves you well!\n" );
				break;
			}
		}
	}
#endif
}

/*
=================
idKeyInput::ExecKeyBinding
=================
*/
bool idKeyInput::ExecKeyBinding( int keynum ) {
	// commands that are used by the async thread
	// don't add text
	if ( keys[keynum].usercmdAction ) {
		return false;
	}

	// send the bound action
	if ( keys[keynum].binding.Length() ) {
		cmdSystem->BufferCommandText( CMD_EXEC_APPEND, keys[keynum].binding.c_str() );
		cmdSystem->BufferCommandText( CMD_EXEC_APPEND, "\n" );
	}
	return true;
}

/*
===================
idKeyInput::ClearStates
===================
*/
void idKeyInput::ClearStates( void ) {
	int i;

	for ( i = 0; i < MAX_KEYS; i++ ) {
		if ( keys[i].down ) {
			PreliminaryKeyEvent( i, false );
		}
		keys[i].down = false;
	}

	// clear the usercommand states
	usercmdGen->Clear();
}

/*
===================
idKeyInput::Init
===================
*/
void idKeyInput::Init( void ) {

	keys = new idKey[MAX_KEYS];

	// register our functions
	cmdSystem->AddCommand( "bind", Key_Bind_f, CMD_FL_SYSTEM, "binds a command to a key", idKeyInput::ArgCompletion_KeyName );
	cmdSystem->AddCommand( "bindunbindtwo", Key_BindUnBindTwo_f, CMD_FL_SYSTEM, "binds a key but unbinds it first if there are more than two binds" );
	cmdSystem->AddCommand( "unbind", Key_Unbind_f, CMD_FL_SYSTEM, "unbinds any command from a key", idKeyInput::ArgCompletion_KeyName );
	cmdSystem->AddCommand( "unbindall", Key_Unbindall_f, CMD_FL_SYSTEM, "unbinds any commands from all keys" );
	cmdSystem->AddCommand( "listBinds", Key_ListBinds_f, CMD_FL_SYSTEM, "lists key bindings" );
}

/*
===================
idKeyInput::Shutdown
===================
*/
void idKeyInput::Shutdown( void ) {
	delete [] keys;
	keys = NULL;
}