numlock.cpp

/*
 * 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.
 */