xgps.c

gpsd, a popular GPS daemon.

/* $Id: xgps.c 4548 2007-12-13 01:40:06Z esr $ */
/* $gpsd: xgps.c 3871 2006-11-13 00:40:00Z esr $ */

/*
 * Copyright (c) 2007 Marc Balmer <[e-mail]>
 * Copyright (c) 2006 Eric S. Raymond
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <math.h>
#include <errno.h>
#include <stdbool.h>

#include <Xm/Xm.h>
#include <Xm/MwmUtil.h>
#include <Xm/PushB.h>
#include <Xm/Form.h>
#include <Xm/RowColumn.h>
#include <Xm/Label.h>
#include <Xm/TextF.h>
#include <Xm/List.h>
#include <Xm/DrawingA.h>
#include <Xm/Protocols.h>
#include <Xm/MainW.h>
#include <Xm/Frame.h>
#include <Xm/LabelG.h>
#include <Xm/ScrolledW.h>
#include <Xm/MessageB.h>
#include <Xm/Text.h>
#include <X11/Shell.h>

#include <gpsd_config.h>
#include <gps.h>

#include "display.h"

/* Widget and window sizes. */
#define MAX_FONTSIZE	18		/* maximum fontsize we handle*/

/* height of satellite-data display */
#define SATDATA_HEIGHT	MAX_FONTSIZE*(MAXCHANNELS+1)
#define LEFTSIDE_WIDTH	205		/* width of data-display side */
#define SATDIAG_SIZE	400		/* size of satellite diagram */

static Widget toplevel, form, left, right;
static Widget satellite_list, satellite_diagram;
static Widget status_form, status_frame, status;
static Widget text_1, text_2, text_3, text_4, text_5;
static Widget text_6, text_7, text_8, text_9, text_10;
static GC gc;

static struct gps_data_t *gpsdata;
static time_t timer;	/* time of last state change */
static int state = 0;	/* or MODE_NO_FIX=1, MODE_2D=2, MODE_3D=3 */
static XtAppContext app;
static XtIntervalId timeout, gps_timeout;
static XtInputId gps_input;
static enum deg_str_type deg_type = deg_dd;

char *server, *device;
char *port = DEFAULT_GPSD_PORT;
bool jitteropt = false;

bool gps_lost;

/*@ -nullassign @*/
static XrmOptionDescRec options[] = {
	{ "-altunits",  "*altunits",	XrmoptionSepArg,	NULL },
	{ "-speedunits","*speedunits",	XrmoptionSepArg,	NULL },
};
String fallback_resources[] = { NULL} ;
/*@ +nullassign @*/

struct unit_t {
	char *legend;
	double factor;
};
static struct unit_t speedtable[] = {
	{ "knots",	MPS_TO_KNOTS },
	{ "mph",	MPS_TO_MPH },
	{ "kmh",	MPS_TO_KPH },
}, *speedunits = speedtable;
static struct unit_t alttable[] = {
	{ "feet",	METERS_TO_FEET },
	{ "meters",	1},
}, *altunits = alttable;

void dlg_callback(Widget dialog, XtPointer client_data, XtPointer call_data);
void help_cb(Widget widget, XtPointer client_data, XtPointer call_data);
void file_cb(Widget widget, XtPointer client_data, XtPointer call_data);
Widget err_dialog(Widget widget, char *s);
void handle_gps(XtPointer client_data, XtIntervalId *ignored);

static void
quit_cb(void)
{
    exit(0);
}

/*@ -mustfreefresh -compdef +ignoresigns @*/
static Pixel
get_pixel(Widget w, char *resource_value)
{
	Colormap colormap;
	Boolean cstatus;
	XColor exact, color;

	colormap = DefaultColormapOfScreen(
	    DefaultScreenOfDisplay(XtDisplay(w)));
	/*@i@*/cstatus = XAllocNamedColor(XtDisplay(w), colormap, resource_value,
	    &color, &exact);
	if (cstatus == (Boolean)False) {
		(void)fprintf(stderr, "Unknown color: %s", resource_value);
		color.pixel = BlackPixelOfScreen(
		    DefaultScreenOfDisplay(XtDisplay(w)));
	};
	/*@i1@*/return (color.pixel);
}

static void
build_gui(Widget toplevel)
{
	Widget main_w, menubar, widget, sat_frame, sky_frame, gps_frame;
	Widget gps_form, gps_data, sw;

	Arg args[100];
	XGCValues gcv;
	Atom delw;
	int i;
	XmString string;
	XmString file, help, about, quit;

	/*@ -immediatetrans -usedef @*/
	/* the root application window */
	XtSetArg(args[0], XmNwidth, LEFTSIDE_WIDTH + SATDIAG_SIZE + 26);
	XtSetArg(args[1], XmNheight, SATDATA_HEIGHT + 14 * MAX_FONTSIZE + 12);
	/*@ +immediatetrans +usedef @*/
	XtSetValues(toplevel, args, 2);

	/*@ -onlytrans @*/
	main_w = XtVaCreateManagedWidget("main_window",
	    xmMainWindowWidgetClass,	toplevel,
	    NULL);

	/* Construct the menubar */
	file = XmStringCreateLocalized("File");
	help = XmStringCreateLocalized("Help");
	menubar = XmVaCreateSimpleMenuBar(main_w, "menubar",
	    XmVaCASCADEBUTTON,	file,	'F',
	    XmVaCASCADEBUTTON,	help,	'H',
	    NULL);
	XmStringFree(file);

	if ((widget = XtNameToWidget(menubar, "button_1")))
		XtVaSetValues(menubar, XmNmenuHelpWidget, widget, NULL);

	quit = XmStringCreateLocalized("Quit");
	(void)XmVaCreateSimplePulldownMenu(menubar, "file_menu", 0, file_cb,
	    XmVaPUSHBUTTON, quit, 'Q', NULL, NULL,
	    NULL);
	XmStringFree(quit);

	about = XmStringCreateLocalized("About");
	(void)XmVaCreateSimplePulldownMenu(menubar, "help_menu", 1, help_cb,
	    XmVaPUSHBUTTON, help,  'H', NULL, NULL,
	    XmVaSEPARATOR,
	    XmVaPUSHBUTTON, about, 'A', NULL, NULL,
	    NULL);
	XmStringFree(help);
	XmStringFree(about);

	XtManageChild(menubar);


	/* a form to assist with geometry negotiation */
	form = XtVaCreateManagedWidget("form",
	    xmFormWidgetClass,		main_w,
	    XmNfractionBase,		3,
	    NULL);

	/* satellite frame */
	sat_frame = XtVaCreateWidget("satellite_frame",
	    xmFrameWidgetClass,		form,
	    XmNshadowType,		XmSHADOW_ETCHED_IN,
	    XmNtopAttachment,		XmATTACH_FORM,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		1,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		2,
	    XmNleftAttachment,		XmATTACH_FORM,
	    NULL);
	(void)XtVaCreateManagedWidget("Satellite List",
	    xmLabelGadgetClass,		sat_frame,
	    XmNchildType,		XmFRAME_TITLE_CHILD,
	    XmNchildVerticalAlignment,	XmALIGNMENT_CENTER,
	    NULL);

	/* the left half of the screen */
	left = XtVaCreateManagedWidget("left",
	    xmFormWidgetClass, 	sat_frame,
	    NULL);

	/* skyview frame */
	sky_frame = XtVaCreateWidget("skyview_frame",
	    xmFrameWidgetClass,		form,
	    XmNshadowType,		XmSHADOW_ETCHED_IN,
	    XmNtopAttachment,		XmATTACH_FORM,
	    XmNrightAttachment,		XmATTACH_FORM,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		2,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		1,
	    NULL);
	(void)XtVaCreateManagedWidget("Skyview",
	    xmLabelGadgetClass,		sky_frame,
	    XmNchildType,		XmFRAME_TITLE_CHILD,
	    XmNchildVerticalAlignment,	XmALIGNMENT_CENTER,
	    NULL);

	/* the right half of the screen */
	right = XtVaCreateManagedWidget("right",
	    xmFormWidgetClass, 		sky_frame,
	    NULL);

	/* the application status bar */
	status_form = XtVaCreateManagedWidget("status_form",
	    xmFormWidgetClass,		form,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		2,
	    XmNleftAttachment,		XmATTACH_FORM,
	    XmNrightAttachment,		XmATTACH_FORM,
	    XmNtopAttachment,           XmATTACH_WIDGET,
	    XmNtopWidget,               left,
	    XmNfractionBase,		3,
	    NULL);
	status_frame = XtVaCreateWidget("status_frame",
	    xmFrameWidgetClass,		status_form,
	    XmNshadowType,		XmSHADOW_ETCHED_IN,
	    XmNtopAttachment,		XmATTACH_FORM,
	    XmNleftAttachment,		XmATTACH_FORM,
	    XmNrightAttachment,		XmATTACH_FORM,
	    XmNbottomAttachment,	XmATTACH_FORM,
	    NULL);
	(void)XtVaCreateManagedWidget("Message Data",
	    xmLabelGadgetClass,		status_frame,
	    XmNchildType,		XmFRAME_TITLE_CHILD,
	    XmNchildVerticalAlignment,	XmALIGNMENT_CENTER,
	    NULL);
	status = XtVaCreateManagedWidget("status", 
					 xmTextFieldWidgetClass, status_form,
					 XmNcursorPositionVisible, False,
					 XmNeditable, False,
					 XmNmarginHeight, 1,
					 XmNhighlightThickness, 0,
					 XmNshadowThickness, 2,
					 XmNleftAttachment, XmATTACH_FORM,
					 XmNrightAttachment, XmATTACH_FORM,
					 XmNtopAttachment, XmATTACH_FORM,
					 XmNbottomAttachment, XmATTACH_FORM,
					 NULL);

	/* gps information frame */
	gps_form = XtVaCreateManagedWidget("gps_form",
	    xmFormWidgetClass,		form,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		2,
	    XmNleftAttachment,		XmATTACH_FORM,
	    XmNrightAttachment,		XmATTACH_FORM,
	    XmNbottomAttachment,	XmATTACH_FORM,
	    XmNtopAttachment,           XmATTACH_WIDGET,
	    XmNtopWidget,               status_form,
	    XmNfractionBase,		3,
	    NULL);
	gps_frame = XtVaCreateWidget("gps_frame",
	    xmFrameWidgetClass,		gps_form,
	    XmNshadowType,		XmSHADOW_ETCHED_IN,
	    XmNtopAttachment,		XmATTACH_FORM,
	    XmNleftAttachment,		XmATTACH_FORM,
	    XmNrightAttachment,		XmATTACH_FORM,
	    XmNbottomAttachment,	XmATTACH_FORM,
	    NULL);
	(void)XtVaCreateManagedWidget("GPS Data",
	    xmLabelGadgetClass,		gps_frame,
	    XmNchildType,		XmFRAME_TITLE_CHILD,
	    XmNchildVerticalAlignment,	XmALIGNMENT_CENTER,
	    NULL);
	sw = XtVaCreateManagedWidget("scrolled_w",
	    xmScrolledWindowWidgetClass,	gps_frame,
	    XmNscrollingPolicy,			XmAUTOMATIC,
	    NULL);
	gps_data = XtVaCreateWidget("gps_data",
	    xmFormWidgetClass,		sw,
	    XmNfractionBase,		30,
	    NULL);

	/* satellite location and SNR data panel */
	satellite_list = XtVaCreateManagedWidget("satellite_list",
	    xmListWidgetClass,		left,
	    XmNbackground,		get_pixel(toplevel, "snow"),
	    XmNlistSizePolicy,		XmCONSTANT,
	    XmNhighlightThickness,	0,
	    XmNlistSpacing,		4,
	    XmNtopAttachment,		XmATTACH_FORM,
	    XmNrightAttachment,		XmATTACH_FORM,
	    XmNbottomAttachment,	XmATTACH_FORM,
	    XmNleftAttachment,		XmATTACH_FORM,
	    NULL);

	/* the satellite diagram */
	satellite_diagram = XtVaCreateManagedWidget("satellite_diagram",
	    xmDrawingAreaWidgetClass,	right, 
	    XmNbackground,		get_pixel(toplevel, "snow"),
	    XmNheight,			SATDIAG_SIZE + 24,
	    XmNwidth,			SATDIAG_SIZE,
	    XmNtopAttachment,		XmATTACH_FORM,
	    XmNrightAttachment,		XmATTACH_FORM,
	    XmNbottomAttachment,	XmATTACH_FORM,
	    XmNleftAttachment,		XmATTACH_FORM,
	    NULL);

	gcv.foreground = BlackPixelOfScreen(XtScreen(satellite_diagram));
	gc = XCreateGC(XtDisplay(satellite_diagram),
	RootWindowOfScreen(XtScreen(satellite_diagram)), GCForeground, &gcv);
	register_canvas(satellite_diagram, gc);
	XtVaSetValues(satellite_diagram, XmNuserData, gc, NULL);
	/*@i@*/XtAddCallback(satellite_diagram, XmNexposeCallback, redraw, NULL);
	/*@i@*/XtAddCallback(satellite_diagram, XmNresizeCallback, resize, NULL);

	/* the data display */
	(void)XtVaCreateManagedWidget("Time", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		0,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		5,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		6,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		0,
	    NULL);