/*
 * SLiM - Simple Login Manager
 * Copyright (C) 2004-06 Simone Rota <sip@varlock.com>
 * Copyright (C) 2004-06 Johannes Winkelmann <jw@tks6.net>
 * Copyright (C) 2012 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
 *
 * 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.
 *
 * Code adapted from NumLockX, look at the end of this file for
 * the original Copyright information.
*/

#include "numlock.h"
#include <string.h>

NumLock::NumLock()
{
}

int NumLock::xkb_init(Display* dpy)
{
	int xkb_opcode, xkb_event, xkb_error;
	int xkb_lmaj = XkbMajorVersion;
	int xkb_lmin = XkbMinorVersion;

	return XkbLibraryVersion( &xkb_lmaj, &xkb_lmin )
		&& XkbQueryExtension( dpy, &xkb_opcode, &xkb_event, &xkb_error,
				   &xkb_lmaj, &xkb_lmin );
}

unsigned int NumLock::xkb_mask_modifier( XkbDescPtr xkb, const char *name )
{
	int i;
	if( !xkb || !xkb->names )
		return 0;

	for( i = 0; i < XkbNumVirtualMods; i++ ) {
		char* modStr = XGetAtomName( xkb->dpy, xkb->names->vmods[i] );
		if( modStr != NULL && strcmp(name, modStr) == 0 ) {
			unsigned int mask;
			XkbVirtualModsToReal( xkb, 1 << i, &mask );
			return mask;
		}
	}
	return 0;
}

unsigned int NumLock::xkb_numlock_mask(Display* dpy)
{
	XkbDescPtr xkb;

	xkb = XkbGetKeyboard( dpy, XkbAllComponentsMask, XkbUseCoreKbd );
	if( xkb != NULL ) {
		unsigned int mask = xkb_mask_modifier( xkb, "NumLock" );
		XkbFreeKeyboard( xkb, 0, True );
		return mask;
	}
	return 0;
}

void NumLock::control_numlock(Display *dpy, bool flag)
{
	unsigned int mask;

	if( !xkb_init(dpy) )
		return;

	mask = xkb_numlock_mask(dpy);
	if( mask == 0 )
		return;

	if( flag == true )
		XkbLockModifiers ( dpy, XkbUseCoreKbd, mask, mask);
	else
		XkbLockModifiers ( dpy, XkbUseCoreKbd, mask, 0);
}

void NumLock::setOn(Display *dpy)
{
	control_numlock(dpy, true);
}

void NumLock::setOff(Display *dpy)
{
	control_numlock(dpy, false);
}

/*
 * Copyright (C) 2000-2001 Lubos Lunak <l.lunak@kde.org>
 * Copyright (C) 2001 Oswald Buddenhagen <ossi@kde.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
*/