Desktop
/* $Id: gps.c,v 1.3 2010/08/11 23:00:16 khorben Exp $ */
/* Copyright (c) 2010 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Panel */
/* 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, version 3 of the License.
*
* 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/>. */
#if defined(__linux__)
# include <fcntl.h>
# include <unistd.h>
# include <string.h>
# include <errno.h>
#endif
#include <stdlib.h>
#include <System.h>
#include "Panel.h"
/* GPS */
/* private */
/* types */
typedef struct _GPS
{
PanelAppletHelper * helper;
GtkWidget * image;
guint timeout;
#if defined(__linux__)
int fd;
#endif
} GPS;
/* prototypes */
static GtkWidget * _gps_init(PanelApplet * applet);
static void _gps_destroy(PanelApplet * applet);
static gboolean _gps_get(GPS * gps);
static void _gps_set(GPS * gps, gboolean on);
/* callbacks */
static gboolean _on_timeout(gpointer data);
/* public */
/* variables */
PanelApplet applet =
{
NULL,
"GPS",
NULL,
_gps_init,
_gps_destroy,
NULL,
PANEL_APPLET_POSITION_END,
FALSE,
TRUE,
NULL
};
/* private */
/* functions */
/* gps_init */
static GtkWidget * _gps_init(PanelApplet * applet)
{
GPS * gps;
if((gps = malloc(sizeof(*gps))) == NULL)
return NULL;
applet->priv = gps;
gps->helper = applet->helper;
gps->timeout = 0;
#if defined(__linux__)
gps->fd = -1;
#endif
/* XXX find a better image */
gps->image = gtk_image_new_from_icon_name("network-wireless",
applet->helper->icon_size);
gps->timeout = g_timeout_add(1000, _on_timeout, gps);
_on_timeout(gps);
return gps->image;
}
/* gps_destroy */
static void _gps_destroy(PanelApplet * applet)
{
GPS * gps = applet->priv;
if(gps->timeout > 0)
g_source_remove(gps->timeout);
#if defined(__linux__)
if(gps->fd != -1)
close(gps->fd);
#endif
free(gps);
}
/* gps_set */
static void _gps_set(GPS * gps, gboolean on)
{
if(on == TRUE)
gtk_widget_show(gps->image);
else
gtk_widget_hide(gps->image);
}
/* callbacks */
/* on_timeout */
#if defined(__linux__)
static gboolean _gps_get(GPS * gps)
{
/* XXX currently hard-coded for the Openmoko Freerunner */
const char path1[] = "/sys/bus/platform/drivers/neo1973-pm-gps/"
"neo1973-pm-gps.0/power_on";
const char path2[] = "/sys/bus/platform/drivers/neo1973-pm-gps/"
"neo1973-pm-gps.0/pwron";
char on;
if(gps->fd == -1 && (gps->fd = open(path1, O_RDONLY)) == -1
&& (gps->fd = open(path2, O_RDONLY)) == -1)
{
error_set("%s: %s", path1, strerror(errno));
return FALSE;
}
errno = ENODATA; /* in case the pseudo-file is empty */
if(lseek(gps->fd, 0, SEEK_SET) != 0
|| read(gps->fd, &on, sizeof(on)) != 1)
{
error_set("%s: %s", path1, strerror(errno));
close(gps->fd);
gps->fd = -1;
return FALSE;
}
return (on == '1') ? TRUE : FALSE;
}
#else
static gboolean _gps_get(GPS * gps)
{
/* FIXME not supported */
return FALSE;
}
#endif
/* callbacks */
/* on_timeout */
static gboolean _on_timeout(gpointer data)
{
GPS * gps = data;
_gps_set(gps, _gps_get(gps));
return TRUE;
}