gnome-control-center/panels/common/gsd-input-helper.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
 *
 * Copyright (C) 2010 Bastien Nocera <hadess@hadess.net>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "config.h"

#include <string.h>

#include <gdk/gdk.h>
#include <gdk/x11/gdkx.h>

#include <sys/types.h>
#include <X11/Xatom.h>
#include <X11/extensions/XInput2.h>

#include "gsd-input-helper.h"
#include "gsd-device-manager.h"

static gboolean
device_type_is_present (GsdDeviceType type)
{
        g_autoptr(GList) l = gsd_device_manager_list_devices (gsd_device_manager_get (),
                                                              type);
        return l != NULL;
}

gboolean
touchscreen_is_present (void)
{
        return device_type_is_present (GSD_DEVICE_TYPE_TOUCHSCREEN);
}

gboolean
touchpad_is_present (void)
{
        return device_type_is_present (GSD_DEVICE_TYPE_TOUCHPAD);
}

gboolean
mouse_is_present (void)
{
        return device_type_is_present (GSD_DEVICE_TYPE_MOUSE);
}

char *
xdevice_get_device_node (int deviceid)
{
        GdkDisplay    *display;
        Atom           prop;
        Atom           act_type;
        int            act_format;
        unsigned long  nitems, bytes_after;
        unsigned char *data;
        char          *ret;

        display = gdk_display_get_default ();
        gdk_display_sync (display);

        prop = XInternAtom (GDK_DISPLAY_XDISPLAY (display), "Device Node", False);
        if (!prop)
                return NULL;

        gdk_x11_display_error_trap_push (display);

        if (!XIGetProperty (GDK_DISPLAY_XDISPLAY (display),
                            deviceid, prop, 0, 1000, False,
                            AnyPropertyType, &act_type, &act_format,
                            &nitems, &bytes_after, &data) == Success) {
                gdk_x11_display_error_trap_pop_ignored (display);
                return NULL;
        }
        if (gdk_x11_display_error_trap_pop (display))
                goto out;

        if (nitems == 0)
                goto out;

        if (act_type != XA_STRING)
                goto out;

        /* Unknown string format */
        if (act_format != 8)
                goto out;

        ret = g_strdup ((char *) data);

        XFree (data);
        return ret;

out:
        XFree (data);
        return NULL;
}