source: trunk/athena/bin/xdsc/xdsc.c @ 22837

/*
Copyright 1991 by the Massachusetts Institute of Technology

Permission to use, copy, modify, and distribute this
software and its documentation for any purpose and without
fee is hereby granted, provided that the above copyright
notice appear in all copies and that both that copyright
notice and this permission notice appear in supporting
documentation, and that the name of M.I.T. not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
M.I.T. makes no representations about the suitability of
this software for any purpose.  It is provided "as is"
without express or implied warranty.
*/

#include        <unistd.h>
#include        <stdio.h>
#include        <string.h>
#include        <fcntl.h>

#include        <X11/IntrinsicP.h>
#include        <X11/StringDefs.h>
#include        <X11/CoreP.h>

#include        <X11/Xaw/MenuButton.h>
#include        <X11/Xaw/SimpleMenu.h>
#include        <X11/Xaw/Sme.h>
#include        <X11/Xaw/SmeBSB.h>
#include        <X11/Xaw/Cardinals.h>

#include        <X11/Xaw/List.h>
#include        <X11/Xaw/SimpleMenP.h>
#include        <X11/Xaw/Paned.h>
#include        <X11/Xaw/Command.h>
#include        <X11/Xaw/Box.h>
#include        <X11/Xaw/AsciiText.h>
#include        <X11/Xaw/TextP.h>
#include        <X11/Xaw/TextSinkP.h>
#include        <X11/Xaw/Dialog.h>
#include        <X11/Xaw/Form.h>
#include        <X11/Xaw/Label.h>

#include        "xdsc.h"

static char rcsid[] = "$Id: xdsc.c,v 1.35 1999-12-16 01:58:24 danw Exp $";

/*
** Globals
*/

char            *RunCommand();
TextWidget      toptextW, bottextW;
Boolean         debug = False;
char            filebase[50];
int             topscreen = MAIN;
Widget          topW, paneW;
void            RemoveLetterC();
int             char_width;
char            axis[10];
void            TopSelect(), BotSelect();
void            Update(), Stub();
void            PrintEvent();
int             simplemode = 0;
int             edscversion;
Boolean         nocache;

/*
** External functions
*/

extern void     PutUpHelp();
extern void     SubmitTransaction();
extern void     WriteTransaction();
extern char     *tempnam();
extern int      PopdownCB();
extern char     *getenv();
extern void     TriggerAdd(), TriggerNum(), TriggerDelete();
extern void     TriggerWrite(), TriggerPopdown(), TriggerSend();
extern void     TriggerFocusMove();
extern void     DispatchClick();
extern void     FetchIfNecessary();
extern int      HighlightedTransaction();

/*
** Private functions
*/

static void     MenuCallback();
static void     KeyCallback();
static void     QuitCB(), HelpCB();
static void     BuildUserInterface();
static void     DoTheRightThing();
static void     DoTheRightThingInReverse();
static void     CheckEdscVersion();
static void     BuildSkeleton();
static unsigned long GetFontWidth();

/*
** Private globals
*/

static int      filedesparent[2], filedeschild[2];
static FILE     *inputfile, *outputfile;
static char     *meetinglist;

static Widget   topboxW, botboxW;
static Widget   label1W;
static int      prevfirst = 0;
static XawTextPosition  startOfCurrentMeeting = -1;
Display         *dpy;
Window          root_window;
static XawTextPosition  oldarrow = -1;

/*
** Data for top row of buttons
*/

static char * menu_labels0[MAX_BUTTONS] = {
        "Down", "Up", "update", "configure", "mode",
        "show", "HELP", "QUIT"};

static char * menu_names0[MAX_BUTTONS] = {
        "downbutton", "upbutton", "updatebutton", "configurebutton", 
        "modebutton", "showbutton", "helpbutton", "quitbutton"};

static char * submenu_labels0[MAX_BUTTONS][MAX_MENU_LEN] = {
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { "add meeting", "delete meeting", NULL, NULL },
        { "transactions", "meetings", NULL, NULL },
        { "unread", "all", "back ten", NULL },
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL }};

static char * submenu_names0[MAX_BUTTONS][MAX_MENU_LEN] = {
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { "addbutton", "deletebutton", NULL, NULL },
        { "transbutton", "meetingbutton", NULL, NULL },
        { "unreadbutton", "allbutton", "backbutton", NULL },
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL }};

/*
** Data for bottom row of buttons
*/

static char * menu_labels1[MAX_BUTTONS] = {
        "next", "prev", "Next in chain", "Prev in chain",
        "goto", "enter", "write", NULL };

static char * menu_names1[MAX_BUTTONS] = {
        "nextbutton", "prevbutton", "nchainbutton", "pchainbutton",
        "gotobutton", "enterbutton", "writebutton", NULL };

static char * submenu_labels1[MAX_BUTTONS][MAX_MENU_LEN] = {
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { "number", "first", "last", "start of chain", "end of chain", NULL },
        { "reply", "new transaction", NULL },
        { "write to file", "mail to someone", NULL }};

static char * submenu_names1[MAX_BUTTONS][MAX_MENU_LEN] = {
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { NULL, NULL, NULL, NULL },
        { "numberbutton", "firstbutton", "lastbutton", "frefbutton", "lrefbutton",NULL },
        { "replybutton", "newbutton", NULL },
        { "writebutton", "mailbutton", NULL }};


EntryRec        toplevelbuttons[2][MAX_BUTTONS];

void
main(argc, argv)
int argc;
char *argv[];
{
        int     pid;
        char    *oldpath, *newpath, *myname;
        Arg     args[1];
        int     width;
        char    commandline[100];

        if (argc > 1 && !strcmp(argv[1], "-debug"))
                debug = True;

        myname = (myname = strrchr(argv[0], '/')) ? myname + 1 : argv[0];

        if (!strcmp (myname, "lucy"))
                simplemode = True;
        else
                simplemode = False;

        if (simplemode) {
                topW = XtInitialize("topwidget", "Lucy", NULL, 0, &argc, argv);
        }
        else
                topW = XtInitialize("topwidget", "Xdsc", NULL, 0, &argc, argv);

        BuildSkeleton();

/*
** Set our width to 80 chars wide in the current font.  Min value of 500
** means that all the lower buttons will fit.

original code
        char_width = (((TextSinkObject) (toptextW->text.sink))->
                                text_sink.font->max_bounds.width);

removed because font parameter is either private or nonexistent (private in
mit Xaw include files, nonexistent in others).

borrowed code from Xaw/TextSink.c to write a generic GetFontWidth routine.
rearranged some to use font resource, rather than accessing internals.

mdb 7/26/96

*/

        char_width = (int)GetFontWidth(toptextW);
        width = 80 * char_width;
        XtSetArg(args[0], XtNwidth, width < 500 ? 500 : width);
        XtSetValues(topW, args, 1);

/*
        XtRealizeWidget(topW);
        XSync(XtDisplay(topW), False);
*/

        if (debug)
                fprintf (stderr, "Debugging is on\n");

        sprintf (filebase,"/var/tmp/xdsc%d",getpid());

        if (debug)
                fprintf (stderr, "filebase is %s\n", filebase);

        pipe (filedesparent);
        pipe (filedeschild);

        pid = fork();

        if (pid == 0)
                SetUpEdsc();

        close (filedesparent[1]);
        close (filedeschild[0]);

        inputfile = fdopen (filedesparent[0], "r");
        outputfile = fdopen (filedeschild[1], "w");

        CheckEdscVersion();
        ParseMeetingsFile();

        oldpath = getenv("XFILESEARCHPATH");

        BuildUserInterface();
        XtRealizeWidget(topW);

        dpy = XtDisplay(topW);
        root_window = XtWindow(topW);

        (void) MoveToMeeting(INITIALIZE);
/*
** If running in simplemode, switch to reading transactions and put up
** the list of unread ones.
*/
        if (simplemode) {
                TopSelect (NULL, 4, NULL);
                BotSelect (NULL, 0, NULL);
        }
        CheckButtonSensitivity(BUTTONS_UPDATE);
        XtMainLoop();
}

SetUpEdsc()
{
        int     retval;
        char    commandtorun[50];
        char    machtype[20];
        char    *envcommand;
        
        envcommand = getenv("EDSC");
        strcpy (commandtorun, envcommand ? envcommand : EDSC_PATH);

        close (filedesparent[0]);
        close (filedeschild[1]);

        dup2 (filedeschild[0], 0);
        dup2 (filedesparent[1], 1);

        if (debug)
                fprintf (stderr,"commandtorun = '%s'\n", commandtorun);

        retval = execlp (commandtorun, commandtorun, 0);

        fprintf (stderr, "Fatal error:  Unable to exec '%s'\n",commandtorun);
        _exit (-1);
}

/*
** Put up enough of the application that the user doesn't think it's hung...
*/

static void
BuildSkeleton()
{
        Arg             args[5];
        unsigned int    n;
        static XtActionsRec actions[] = {
                {"FetchIfNecessary",    FetchIfNecessary},
                {"MenuCallback",        MenuCallback},
                {"KeyCallback",         KeyCallback},
                {"Update",              Update},
                {"DispatchClick",       DispatchClick},
                {"TriggerAdd",          TriggerAdd},
                {"TriggerDelete",       TriggerDelete},
                {"TriggerFocusMove",    TriggerFocusMove},
                {"TriggerNum",          TriggerNum},
                {"TriggerPopdown",      TriggerPopdown},
                {"TriggerSend",         TriggerSend},
                {"TriggerWrite",        TriggerWrite},
                {"DoTheRightThing",     DoTheRightThing},
                {"DoTheRightThingInReverse",    DoTheRightThingInReverse},
                {"HelpCB",              HelpCB},
                {"QuitCB",              QuitCB},
                {"PopdownCB",           (XtActionProc) PopdownCB},
                {"Stub",                Stub},
                {"PrintEvent",          PrintEvent}};


        n = 0;
        paneW = XtCreateManagedWidget(
                        "pane",
                        panedWidgetClass,
                        topW,
                        args,
                        n);

        n = 0;
        topboxW = XtCreateManagedWidget(
                        "topbox",
                        boxWidgetClass,
                        paneW,
                        args,
                        n);

        XtAppAddActions (       XtWidgetToApplicationContext(topboxW),
                                actions, XtNumber(actions));

        XawSimpleMenuAddGlobalActions(XtWidgetToApplicationContext(topboxW));

        AddChildren (topboxW, 0);

        n = 0;
        XtSetArg(args[n], XtNstring, "Please wait...");         n++;
        XtSetArg(args[n], XtNeditType, XawtextEdit);            n++;
        XtSetArg(args[n], XtNuseStringInPlace, False);          n++;

        toptextW = (TextWidget) XtCreateManagedWidget(
                        "toptext",
                        asciiTextWidgetClass,
                        paneW,
                        args,
                        n);

        n = 0;
        XtSetArg(args[n], XtNeditType, XawtextRead);            n++;
        label1W = XtCreateManagedWidget(
                        "label",
                        asciiTextWidgetClass,
                        paneW,
                        args,
                        n);

        n = 0;
        botboxW = XtCreateWidget(
                        "botbox",
                        boxWidgetClass,
                        paneW,
                        args,
                        n);

        AddChildren (botboxW, 1);

        if (!simplemode)
                XtManageChild (botboxW);

        n = 0;
        XtSetArg(args[n], XtNeditType, XawtextRead);            n++;
        bottextW = (TextWidget) XtCreateManagedWidget(
                        "bottext",
                        asciiTextWidgetClass,
                        paneW,
                        args,
                        n);
}

static void
BuildUserInterface()
{
        Arg             args[5];
        unsigned int    n;
        Dimension       foo;

        static XtActionsRec actions[] = {
                {"FetchIfNecessary",    FetchIfNecessary},
                {"MenuCallback",        MenuCallback},
                {"KeyCallback",         KeyCallback},
                {"Update",              Update},
                {"DispatchClick",       DispatchClick},
                {"TriggerAdd",          TriggerAdd},
                {"TriggerDelete",       TriggerDelete},
                {"TriggerFocusMove",    TriggerFocusMove},
                {"TriggerNum",          TriggerNum},
                {"TriggerPopdown",      TriggerPopdown},
                {"TriggerSend",         TriggerSend},
                {"TriggerWrite",        TriggerWrite},
                {"DoTheRightThing",     DoTheRightThing},
                {"DoTheRightThingInReverse",    DoTheRightThingInReverse},
                {"HelpCB",              HelpCB},
                {"QuitCB",              QuitCB},
                {"PopdownCB",           (XtActionProc) PopdownCB},
                {"Stub",                Stub},
                {"PrintEvent",          PrintEvent}};

/*
        n = 0;
        paneW = XtCreateManagedWidget(
                        "pane",
                        panedWidgetClass,
                        topW,
                        args,
                        n);


        n = 0;
        topboxW = XtCreateManagedWidget(
                        "topbox",
                        boxWidgetClass,
                        paneW,
                        args,
                        n);

        XtAppAddActions (       XtWidgetToApplicationContext(topboxW),
                                actions, XtNumber(actions));

        XawSimpleMenuAddGlobalActions(XtWidgetToApplicationContext(topboxW));

        AddChildren (topboxW, 0);
*/

        n = 0;
        XtSetArg(args[n], XtNstring, meetinglist);              n++;
        XtSetValues(toptextW, args, n);

/*
        n = 0;
        XtSetArg(args[n], XtNstring, meetinglist);              n++;
        XtSetArg(args[n], XtNeditType, XawtextEdit);            n++;
        XtSetArg(args[n], XtNuseStringInPlace, False);          n++;

        toptextW = (TextWidget) XtCreateManagedWidget(
                        "toptext",
                        asciiTextWidgetClass,
                        paneW,
                        args,
                        n);
*/

/*
        n = 0;
        XtSetArg(args[n], XtNeditType, XawtextRead);            n++;
        label1W = XtCreateManagedWidget(
                        "label",
                        asciiTextWidgetClass,
                        paneW,
                        args,
                        n);

        n = 0;
        botboxW = XtCreateWidget(
                        "botbox",
                        boxWidgetClass,
                        paneW,
                        args,
                        n);

        AddChildren (botboxW, 1);

        if (!simplemode) {
                XtManageChild (botboxW);
        }

        n = 0;
        XtSetArg(args[n], XtNeditType, XawtextRead);            n++;
        bottextW = (TextWidget) XtCreateManagedWidget(
                        "bottext",
                        asciiTextWidgetClass,
                        paneW,
                        args,
                        n);
*/

/*
** Add the pane's accelerators to the text widgets and the other kids.
*/
        XtInstallAccelerators(toptextW, paneW);
        XtInstallAccelerators(bottextW, paneW);
        XtInstallAllAccelerators(paneW, paneW);

}

/*
** MenuCallback is called for key hits on menu entries.
** It gets two parameters:  First, the number of the menubutton
** secondly, the index of the entry in the menu.  It
** packs the two parameters into an int and manually calls TopSelect().
*/

static void
MenuCallback(w, event, params, num_params)
Widget  w;
XEvent  *event;
String  *params;
int     *num_params;
{
        int     buttonnum, entrynum;
        int     whichrow;

        if (*num_params != 2)
                goto ABORT;

        for (buttonnum = 0; buttonnum < MAX_BUTTONS; buttonnum++) {
                if (    menu_names0[buttonnum] &&
                        !strcmp(menu_names0[buttonnum], params[0])) {
                                whichrow = 0;
                                break;
                }
                if (    menu_names1[buttonnum] &&
                        !strcmp(menu_names1[buttonnum], params[0])) {
                                whichrow = 1;
                                break;
                }
        }

        if (buttonnum == MAX_BUTTONS)
                goto ABORT;

        for (entrynum = 0; entrynum < MAX_MENU_LEN; entrynum++) {
                if (whichrow == 0) {
                        if (    submenu_names0[buttonnum][entrynum] && 
                                !strcmp(submenu_names0[buttonnum][entrynum],
                                        params[1]))
                                break;
                }
                else {
                        if (    submenu_names1[buttonnum][entrynum] &&
                                !strcmp(submenu_names1[buttonnum][entrynum],
                                        params[1]))
                                break;
                }
        }

        if (entrynum == MAX_MENU_LEN)
                goto ABORT;

/*
** If a menu item was selected, popdown the menu and relinquish keyboard focus.
*/
        if (whichrow == 0)
                TopSelect (NULL, buttonnum + (entrynum << 4));
        else
                BotSelect (NULL, buttonnum + (entrynum << 4));

        if (XtIsSubclass (w, simpleMenuWidgetClass))
                XtPopdown(w);
        XtSetKeyboardFocus(topW, paneW);
        return;

ABORT:

        if (XtIsSubclass (w, simpleMenuWidgetClass))
                XtPopdown(w);
        XtSetKeyboardFocus(topW, paneW);
}

/*
** TopSelect is called either automatically through the select callback
** on a button, or manually through TopCallback when triggered by a
** key hit.
*/

void
TopSelect(w, client_data, call_data)
Widget  w;                              /*IGNORED*/
XtPointer       client_data;
XtPointer       call_data;
{
        int buttonnum, entrynum;
        Arg             args[5];
        unsigned int    n;

        entrynum = ((int) client_data) >> 4;
        buttonnum = ((int) client_data) & 0x0F;

        switch (buttonnum) {
/*
** Move to next or previous meeting if topscreen is showing meetings,
** to next or previous transaction otherwise
*/
        case 0:
                if (topscreen == MAIN) {
                        (void) MoveToMeeting(NEXTNEWS);
                }
                else {
                        BotSelect (NULL, 0, NULL);
                }
                break;

        case 1:
                if (topscreen == MAIN) {
                        (void) MoveToMeeting(PREVNEWS);
                }
                else {
                        BotSelect (NULL, 1, NULL);
                }
                break;
/*
** Check for changed meetings
*/
        case 2:
                MarkLastRead();
                PutUpTempMessage("Rereading meeting list...");
                ParseMeetingsFile();
                n = 0;
                XtSetArg(args[n], XtNstring, meetinglist);              n++;
                XtSetValues(toptextW, args, n);
                TakeDownTempMessage();
                InvalidateHeaders();
                MoveToMeeting(INITIALIZE);
                break;

/*
** configure
*/
        case 3:
                switch (entrynum) {
                case 0:
                        AddMeeting();
                        break;
                case 1:
                        DeleteMeeting();
                        break;
                }
                break;

/*
** mode
*/
        case 4:
                switch (entrynum) {
                case 0:
/*
** Put up list of transactions within the current meeting
*/
                        prevfirst = TransactionNum(CURRENT);
                        PutUpTransactionList(   TransactionNum(CURRENT), 
                                                TransactionNum(LAST));
                        topscreen = LISTTRNS;
                        UpdateHighlightedTransaction(TransactionNum(CURRENT),True);
                        break;
                case 1:
/*
** Put up list of meetings
*/
                        topscreen = MAIN;
                        RestoreTopTextWidget();
                        if (    TransactionNum(HIGHESTSEEN) ==  
                                                TransactionNum(LAST))
                                RemoveLetterC();
                        break;
                }
                break;

/*
** show
*/
        case 5:
                if (topscreen != LISTTRNS)
                        break;
                switch (entrynum) {
                case 0:
                        PutUpTransactionList(
                                TransactionNum(HIGHESTSEEN), TransactionNum(LAST));
                        prevfirst = TransactionNum(HIGHESTSEEN);
                        UpdateHighlightedTransaction(TransactionNum(CURRENT),True);
                        break;
                case 1:
                        PutUpTransactionList(
                                TransactionNum(FIRST), TransactionNum(LAST));
                        prevfirst = TransactionNum(FIRST);
                        UpdateHighlightedTransaction(TransactionNum(CURRENT),True);
                        break;
                case 2:
                        PutUpTransactionList(   prevfirst <= 10 ? 1 : prevfirst - 10, 
                                                TransactionNum(LAST));
                        UpdateHighlightedTransaction(prevfirst - 1,True);
        
                        prevfirst -= 10;
                        if (prevfirst <=0) prevfirst = 1;
                        break;
                }
                break;

        case 6:
                PutUpHelp();
                break;
        case 7:
                QuitCB (NULL, NULL, NULL);
                break;
        }
}

void
BotSelect(w, client_data, call_data)
Widget  w;                              /*IGNORED*/
XtPointer       client_data;
XtPointer       call_data;
{
        int buttonnum, entrynum;

        entrynum = ((int) client_data) >> 4;
        buttonnum = ((int) client_data) & 0x0F;

        switch (buttonnum) {

        case 0:
                if (TransactionNum(CURRENT) < TransactionNum(LAST))
                        GoToTransaction(NEXT, True);
                else 
                        GoToTransaction(CURRENT, True);
                break;

        case 1:
                GoToTransaction(PREV, True);
                break;
        case 2:
                GoToTransaction(NREF, True);
                break;
        case 3:
                GoToTransaction(PREF, True);
                break;
        case 4:
                switch (entrynum) {
                case 0:
                        GetTransactionNum();
                        break;
                case 1:
                        GoToTransaction(FIRST, True);
                        break;
                case 2:
                        GoToTransaction(LAST, True);
                        break;
                case 3:
                        GoToTransaction(FREF, True);
                        break;
                case 4:
                        GoToTransaction(LREF, True);
                        break;
                }
                break;
        case 5:
                switch (entrynum) {
                case 0:
                        if (axis[0] != ' ')
                                SubmitTransaction(TransactionNum(CURRENT));
                        break;
                case 1:
                        if (axis[6] != ' ')
                                SubmitTransaction(0);
                        break;
                }
/*
**  This makes the buttons update to reflect the new transaction.
*/
                GoToTransaction(CURRENT, False);
                break;
        case 6:
                switch (entrynum) {
                case 0:
                        WriteTransaction(TransactionNum(CURRENT));
                        break;
                case 1:
                        break;
                }
                break;
        default:
                fprintf (stderr,"Stub function\n");
        }

}

RestoreTopTextWidget()
{
        Arg             args[1];
        unsigned int    n;

        CheckButtonSensitivity(BUTTONS_ON);

        n = 0;
        XtSetArg(args[n], XtNstring, meetinglist);              n++;
        XtSetValues (toptextW, args, n);
        PutUpArrow(toptextW, startOfCurrentMeeting, True);
}



static void
QuitCB(w, client_data, call_data)
Widget  w;
XtPointer       client_data;
XtPointer       call_data;
{
        (void) SaveMeetingNames("", "");

        fputs("(quit)\n", outputfile);
        fflush (outputfile);
        exit (0);
}

static void
HelpCB(w, client_data, call_data)
Widget  w;
XtPointer       client_data;
XtPointer       call_data;
{
        PutUpHelp();
}

/*
**  HighlightNewItem...Change the highlighted line in the passed textwidget
**  in the direction requested.  Return 0 if successful, -1 if there was
**  no meeting in that direction.
*/

HighlightNewItem(textW, mode, flag)
Widget  textW;          /* list of meetings */
int     mode;           /* one of { NEXTNEWS, PREVNEWS, UPDATE, INITIALIZE} */
Boolean flag;           /* update current meeting? */
{
        Arg             args[5];
        unsigned int    n;
        XawTextPosition start, end, inspoint;
        char            *tempstring, *foo, *tempptr;
        int             length;
        char            statusline[LONGNAMELEN + 25];
        char            longmtg[LONGNAMELEN];
        char            shortmtg[SHORTNAMELEN];

        inspoint = XawTextGetInsertionPoint(textW);

        n = 0;
        XtSetArg(args[n], XtNstring, &tempstring);              n++;
        XtGetValues (textW, args, n);

        if (tempstring[inspoint] == '\0')
                return (-1);

/*
** Find start and end of current line.
*/

        for (start = inspoint; start && tempstring[start-1] != '\n'; start--)
                ;
        for (   end = inspoint;  
                tempstring[end] != '\0' && tempstring[end] != '\n'; 
                end++)
                ;

/*
** Special case for initializing:  change mode to NEXTNEWS unless  we're 
** already on a line with unread transactions.  Do nothing in simplemode, 
** because we always want to stay on the first line.
*/
        if (mode == INITIALIZE && simplemode != True)  {
                if ( tempstring[start + 2] != 'c')
                        mode = NEXTNEWS;
        }

        if (mode == NEXTNEWS) {

                if (start == end || tempstring[end] == '\0') {
                        PutUpWarning(   "", 
                                        "Nothing more to read", False);
                        return(-1);
                }

                do {
                        if (tempstring[end] == '\n') {
                                start = end + 1;
                        }
                        end = start + strcspn (tempstring + start, "\n\0");
                } while (       tempstring[end] != '\0' &&
                                tempstring[start + 2] != 'c');


                if ( tempstring[start] == '\0') {
                        PutUpWarning(   "", 
                                        "Nothing more to read", False);
                        return(-1);
                }

        }

        else if (mode == PREVNEWS) {
                if (start == 0) {
                        PutUpWarning(   "", 
                                        "no previous meeting with unread news", False);
                        return(-1);
                }
                do {
                        end = start - 1;
                        for (   start = end - 1; 
                                start > 0 && tempstring[start] != '\n';
                                start--)
                                        ;
                        if (start != 0) start++;
                } while (       start &&
                                tempstring[start + 2] != 'c');
                if ( tempstring[start + 2] != 'c' ) {
                        PutUpWarning(   "", 
                                        "no previous meeting with unread news", False);
                        return(-1);
                }
        }

        else if (mode == UPDATE) {
/*
** Just need to update current meeting to match highlighted item.
*/
        }

        PutUpArrow(textW, start, True);

        if (flag) {
                length = (end - start);
                foo = (char *) calloc (length + 1, sizeof(char));
                strncpy (foo, tempstring + start + 8, length - 8);
                tempptr = strchr (foo, ',');
                *tempptr = '\0';
                strcpy (longmtg, foo);
                strcpy (shortmtg, tempptr + 2);

                free (foo);
        }

        if (SaveMeetingNames(longmtg, shortmtg) == -1) {
                PutUpStatusMessage("No current meeting");
                CheckButtonSensitivity(BUTTONS_OFF);
                return (-1);
        }
        CheckButtonSensitivity(BUTTONS_ON);

        sprintf (statusline, "Reading %s [%d-%d]", 
                        longmtg,
                        TransactionNum(FIRST),
                        TransactionNum(LAST));

        PutUpStatusMessage(statusline);

        XFlush(XtDisplay(textW));
        return(0);
}


/*
** Run the command.  If textW and filename are passed,
** read the contents of filename after running the command
** and put them into textW.  
**
** If returnvalue is NULL, don't wait for a response from the
** command.  Otherwise, return a pointer to the return value,
** which must be freed by the calling routine.
**
** This version uses byte-by-byte i/o so it can recognize \n
** as end-of-data.  Can't use fgets because we don't know
** how long the data stream is, and need to keep reallocing.
**
** Return -1 on error.
*/

char    *
RunCommand (command, textW, filename, returnvalue)
char    *command;
Widget  textW;
char    *filename;
Boolean returnvalue;
{
        char    *message;
        int     cursize = BUFSIZE;
        int     curbyte = 0;

/*
** Send command to child's input stream
*/
        if (fputs(command, outputfile) == EOF) {
                fprintf (stderr, "Error on fputs\n");
                return ((char *)-1);
        }
        fflush (outputfile);

        if (debug)
                fprintf (stderr, "appl: %s\n",command);
        fflush (stderr);

        if (!returnvalue)
                return (NULL);
/*
** Look for child's (one-line) response
*/

READLINE:

        message = (char *) malloc (BUFSIZE);
        
        while ((        message [cursize - BUFSIZE + curbyte] = 
                        fgetc (inputfile)) != '\n') {

                curbyte++;
                if (curbyte == BUFSIZE) {
                        cursize += BUFSIZE;
                        curbyte = 0;
                        message = (char *) realloc (message, cursize);
                }
        }

        message[cursize - BUFSIZE + curbyte] = '\0';

        if (debug)
                fprintf (stderr, "edsc: %s\n",message);

        if (message[0] == ';' ) {
                PutUpWarning("ERROR", message + 1, False);
                myfree (message);
                return ((char *)-1);
        }

        if (message[0] == '-') {
                PutUpWarning("WARNING", message + 1, False);
                myfree (message);
                curbyte = 0;
                cursize = BUFSIZE;
                goto READLINE;
        }
/*
** Read the verbose response and put it into the text widget
*/
        if (filename && textW)
                FileIntoWidget(filename, textW);

        return (message);
}


FileIntoWidget(filename, textW)
char            *filename;
TextWidget      textW;
{
        unsigned int    fd;
        Arg             args[5];
        char            *message;
        int             cursize = BUFSIZE;
        int             numread = 1, n;
        char            errormsg[80];

        fd = open(filename, O_RDONLY);

        if (fd == -1) {
                sprintf (errormsg,"Error opening file %s\n",filename);
                PutUpWarning("WARNING", errormsg, False);
                return (-1);
        }

/*
** Make certain we don't try to erase the (now nonexistant) plus sign.
*/
        if (textW == toptextW)
                oldarrow = -1;

        message = (char*) malloc (cursize);

        while (!HELL_FROZEN_OVER) {
                numread = read (fd, message + cursize - BUFSIZE, BUFSIZE);
                if (numread == -1) {
                        sprintf (errormsg,"Error reading from file %s\n",filename);
                        PutUpWarning("WARNING", errormsg, False);
                        close (fd);
                        return(-1);
                }
                if (numread < BUFSIZE)
                        break;

                cursize += BUFSIZE;
                message = (char*) realloc (message, cursize);
        }

        if (*message) {
                message[cursize - BUFSIZE + numread] = '\0';
                n = 0;
                XtSetArg (args[n], XtNstring, message);         n++;
                XtSetValues (textW, args, n);
        }
        else {
                PutUpWarning(   "", 
                                "No text in this transaction", False);
                XBell (XtDisplay(textW), 0);

        }

        XFlush(XtDisplay(textW));

        myfree (message);
        close (fd);
        return(0);
}

static void
CheckEdscVersion()
{
        char    *version;

        version = RunCommand ("(gpv)\n", NULL, NULL, True);

        if ((int) version == -1) {
                fprintf (stderr, "Cannot communicate with edsc.\n");
                exit (-1);
        }

        edscversion = atoi(version + 1);

        if (edscversion < 24) {
                fprintf (stderr, "Caution...using edsc version %1.1f.  ",(float) edscversion/10.0);
                fprintf (stderr, "Should be using at least 2.4.\n");
        }

        nocache = (edscversion >= 25) ? True : False;
}

ParseMeetingsFile()
{
        char    *fulllist;
        char    *movingptr;
        char    *firstquote, *secondquote;
        int     status;
        char    fullname[100], shortname[100];
        int     i;

        fulllist = RunCommand ("(gml)\n", NULL, NULL, True);
        if ((int) fulllist <= 0) return;

        if (meetinglist)
                myfree (meetinglist);

        i = strlen(fulllist) * 2;
        meetinglist = (char *) calloc (i, sizeof(char));
        if (debug) fprintf (stderr, "Allocated %x, %d long\n", meetinglist, i);

        secondquote = fulllist;

        for (i = 0; ; i++) {

                movingptr = strchr (secondquote + 1, '(');

                if (!movingptr)
                        break;

                movingptr++;

                status = atoi(movingptr);

                firstquote = strchr(movingptr, '"');
                secondquote = strchr(firstquote+1, '"');
                *secondquote = '\0';
                strcpy (fullname, firstquote + 1);

                if (*(secondquote + 1) == ')') {
                        *shortname = '\0';
                }

                else {
                        firstquote = strchr(secondquote+1, '"');
                        secondquote = strchr(firstquote+1, '"');
                        *secondquote = '\0';
                        strcpy (shortname, firstquote + 1);
                }

                if (debug)
                        fprintf (stderr, "Got %d, '%s', '%s'\n",
                                status, fullname, shortname);

                sprintf (meetinglist, "%s  %c     %s, %s\n",
                                meetinglist, 
                                status ? 'c' : ' ', 
                                fullname, shortname);
        }

        sprintf (meetinglist, "%s\0",meetinglist);
        myfree(fulllist);
        if (debug) fprintf (stderr, "Actually used %d\n", strlen(meetinglist));
}

myfree(ptr)
char    *ptr;
{
        if ((int)ptr > 0) {
                if (debug) fprintf (stderr, "Freeing %x\n",ptr);
                free(ptr);
        }
        else if (debug) fprintf (stderr, "Not freeing %x\n",ptr);
}

/*
** An item in the upper text window has been clicked on.  If it is a
** meeting, move there and put the first transaction on the screen. 
** If it's a transaction, we display it in the lower window.
*/

void
Update()
{
        if (topscreen == MAIN) {
                (void) MoveToMeeting(UPDATE);
        }
        else if (topscreen == LISTTRNS) {
                GoToTransaction(HighlightedTransaction(), True);
        }
}


void
Stub()
{
}

void
PrintEvent(w, event, params, num_params)
Widget  w;
XEvent  *event;
String  *params;
int     *num_params;
{
        fprintf(stderr, "event type %d for widget %s\n",
                event->type, XtName(w));
}


/*
**  If we're reading a transaction, scroll it one page down.
**  If we're at the end of a transaction, go to the next one.
**  If we're at the end of a meeting, find the next one with unread
**  transactions.
*/

static void
DoTheRightThing()
{
        if (PopdownCB(NULL, NULL, NULL))
                return;

        if (!TryToScrollAPage(bottextW,1)) {
                return;
        }
                
/*
**  Are we at the end of a meeting?
*/
        if (TransactionNum(NEXT) != 0) {
/*
**  No, read the next transaction
*/
                BotSelect(NULL, 0, NULL);
        }
        else {
/*
**  Yes, go to the next meeting and read its next transaction.
*/
                if ((simplemode != True) && (MoveToMeeting(NEXTNEWS) == 0)) {
                        BotSelect(NULL, 0, NULL);
                }
        }
}

static void
DoTheRightThingInReverse()
{
        if (!TryToScrollAPage(bottextW,-1)) {
                return;
        }
                
/*
**  Are we at the start of a meeting?
*/
        if (TransactionNum(CURRENT) > TransactionNum(FIRST)) {
/*
**  No, read the prev transaction
*/
                BotSelect(NULL, (XtPointer)1, NULL);
        }
        else {
/*
**  Yes, go to the prev meeting and read its next transaction.
*/
                TopSelect(NULL, (XtPointer)1, NULL);
        }
}

/*
**  Code stolen from Text.c and TextAction.c to scroll the text widget.
**  Many text functions are static, so I had to take what I could get.
*/

TryToScrollAPage(ctx, direction)
TextWidget      ctx;
int             direction;
{
        int scroll_val = (ctx->text.lt.lines - 1) * direction;

/*
** Don't scroll off the bottom
*/
        if (ctx->text.lt.info[ctx->text.lt.lines].position > 
                        ctx->text.lastPos &&
                        direction > 0) {
                return (-1);
        }
/*
** Don't scroll off the top
*/
        if (ctx->text.lt.top == 0 &&
                        direction < 0) {
                return (-1);
        }

        _XawTextPrepareToUpdate(ctx);
        _XawTextVScroll(ctx, scroll_val);

        ctx->text.insertPos = ctx->text.lt.top;
        _XawTextCheckResize(ctx);
        _XawTextExecuteUpdate(ctx);
        ctx->text.mult = 1;
        return (0);
}


static char             oldline[80];

PutUpTempMessage(string)
char    *string;
{
        char            *returndata;
        Arg             args[1];

        XtSetArg(args[0], XtNstring, &returndata);
        XtGetValues (label1W, args, 1);
        strcpy (oldline, returndata);

        XtSetArg(args[0], XtNstring, string);
        XtSetValues (label1W, args, 1);
        XFlush(XtDisplay(label1W));
}

TakeDownTempMessage()
{
        Arg             args[1];

        XtSetArg(args[0], XtNstring, oldline);
        XtSetValues (label1W, args, 1);
}

PutUpStatusMessage(string)
char    *string;
{
        Arg             args[1];

        XtSetArg(args[0], XtNstring, string);
        XtSetValues (label1W, args, 1);
        XFlush(XtDisplay(label1W));
}

/*
** PutUpArrow assumes that "start" is the first character position of a line
** in a text widget.  It puts a marker "+" on this line, and if moveinsert
** is True, moves the insert point there.
*/

PutUpArrow(textW, start, moveinsert)
TextWidget      textW;
XawTextPosition start;
Boolean         moveinsert;
{
        XawTextBlock            textblock;
        static int              oldtopscreen = -1;
        int                     offset;
        XawTextPosition         oldinspoint;

        offset = (topscreen == MAIN) ? 7 : 0;

        oldinspoint = XawTextGetInsertionPoint(textW);

/*
** Don't try to erase an arrow on another top screen
*/
        if (topscreen != oldtopscreen)
                oldarrow = -1;

        oldtopscreen = topscreen;

        textblock.firstPos = 0;
        textblock.length = 1;
        textblock.format = FMT8BIT;

        if (oldarrow != -1) {
                textblock.ptr = " ";
                XawTextReplace (        textW, oldarrow + offset, 
                                        oldarrow + offset + 1, &textblock);
        }

        textblock.ptr = "+";

        XawTextReplace (        textW, start + offset, 
                                start + offset + 1, &textblock);

        if (moveinsert)
                XawTextSetInsertionPoint (textW, start);
        else
                XawTextSetInsertionPoint (textW, oldinspoint);

        if (topscreen == MAIN)
                startOfCurrentMeeting = start;

        XFlush(XtDisplay(textW));

        oldarrow = start;
}

/*
**  This assumes the insert position is at the start of the line containing
**  the letter 'c'.  
*/

/*
**  If UseStringInPlace were True for toptextW, we
**  wouldn't need both the XawTextReplace and the setting of
**  the char in meetinglist, but setting it to True causes weird
**  memory overlaps I haven't figured out yet.
*/

void
RemoveLetterC()
{
        XawTextBlock            textblock;
        XawTextPosition         inspoint;

        textblock.firstPos = 0;
        textblock.length = 1;
        textblock.format = FMT8BIT;
        textblock.ptr = " ";

        inspoint = startOfCurrentMeeting;

        if (inspoint > strlen (meetinglist))
                return;

        XawTextReplace (toptextW, inspoint + 2, inspoint + 3, &textblock);

        *(meetinglist + inspoint + 2) = ' ';

        XFlush(XtDisplay(toptextW));
}

AddChildren (parent, whichone)
Widget  parent;
int     whichone;
{
        Widget  command, menu, entry;
        int     i, j, n;
        char    *name, *label;
        Arg     args[5];
        EntryRec        *toprec, *newrec;
        void    (*mycallback)();

        char **buttonlabels;
        char **buttonnames;

        if (whichone == 0) {
                buttonlabels = menu_labels0;
                buttonnames = menu_names0;
                mycallback = TopSelect;
        }
        else {
                buttonlabels = menu_labels1;
                buttonnames = menu_names1;
                mycallback = BotSelect;
        }

        for (i = 0; i < MAX_BUTTONS && buttonnames[i]; i++) {
                n = 0;
                XtSetArg(args[n], XtNmenuName, buttonlabels[i]);        n++;
                XtSetArg(args[n], XtNlabel, buttonlabels[i]);           n++;

                if (whichone == 0) {
                        label = submenu_labels0[i][0];
                        name = submenu_names0[i][0];
                }
                else {
                        label = submenu_labels1[i][0];
                        name = submenu_names1[i][0];
                }
                toprec = &(toplevelbuttons[whichone][i]);

                if (name) {
                        command = XtCreateManagedWidget(
                                buttonnames[i],
                                menuButtonWidgetClass, parent,
                                args, n);
                }
                else {
                        command = XtCreateManagedWidget(
                                buttonnames[i],
                                commandWidgetClass, parent,
                                args, n);
                        XtAddCallback(  command, XtNcallback, 
                                        mycallback, (XtPointer) i);
                }

                toprec->button = command;
                toprec->nextrec = NULL;

                XtInstallAccelerators(topW, command);

                if (!name)
                        continue;

/*
**  Add menus to menu buttons.
*/

                n = 0;
                menu = XtCreatePopupShell(
                                buttonlabels[i],
                                simpleMenuWidgetClass, 
                                parent, 
                                args, n);

                for (j = 0; j < MAX_MENU_LEN; j++) {
                        if (whichone == 0) {
                                label = submenu_labels0[i][j];
                                name = submenu_names0[i][j];
                        }
                        else {
                                label = submenu_labels1[i][j];
                                name = submenu_names1[i][j];
                        }
                        if (!name)
                                break;

                        newrec = (EntryRec *) malloc (sizeof (EntryRec));
                        toprec->nextrec = newrec; 
                        newrec->nextrec = NULL; 
                        n = 0;
                        XtSetArg(args[n], XtNlabel, label);             n++;

                        entry = XtCreateManagedWidget(  
                                        name, smeBSBObjectClass, menu,
                                        args, n);
                        XtAddCallback(  entry, XtNcallback,
                                        mycallback,
                                        (XtPointer) (i + (j << 4)));
                        newrec->button = entry;
                        toprec = newrec;
                }
        }
}
    
/*
** A keyboard equivalent has been hit.  For normal command widgets, send
** them a button-one-down and button-one-up.  For menu buttons, just send
** them the button-down, and their child will send the button-up.
*/

static void     
KeyCallback(w, event, params, num_params)
Widget  w;
XEvent  *event;
String  *params;
int     *num_params;
{
        Widget          button;
        XButtonEvent    MyEvent;
        int             i, whichrow;
        
        if (*num_params < 1)
                return;

        for (i = 0; i < MAX_BUTTONS; i++) {

                if (menu_names0[i] && !strcmp (params[0], menu_names0[i])) {
                        whichrow = 0;
                        break;
                }

                if (menu_names1[i] && !strcmp (params[0], menu_names1[i])) {
                        whichrow = 1;
                        break;
                }
        }

        if (i == MAX_BUTTONS) {
                fprintf (stderr, "Key not found.  Aborting.\n");
                return;
        }

        button = (toplevelbuttons[whichrow][i]).button;

        MyEvent.type = ButtonPress;
        MyEvent.display = dpy;
        MyEvent.window = XtWindow(button);
        MyEvent.button = 1;
        MyEvent.x = 1;
        MyEvent.y = 1;
        MyEvent.state = ButtonPressMask;
        XSendEvent(     dpy,
                        XtWindow(button),
                        False,
                        ButtonPressMask,
                        (XEvent *) &MyEvent);

        XSync(dpy, False);
        if (!(toplevelbuttons[whichrow][i]).nextrec) {
                MyEvent.type = ButtonRelease;
                MyEvent.state = ButtonReleaseMask;
                XSendEvent(     dpy,
                                XtWindow(button),
                                False,
                                ButtonReleaseMask,
                                (XEvent *) &MyEvent);
        }

}

/*
**  Check time interval between mouse clicks.  If it's less than the
**  intrinsics' multi-click timer, call my own "Update" procedure.
**  Otherwise, pass the click on to the text widget.
*/

void
DispatchClick(w, event, params, num_params)
Widget w;
XEvent *event;
String *params;         /* unused */
Cardinal *num_params;   /* unused */
{
        static Time     lasttime = 0;

        if (    lasttime == 0 ||
                (XtLastTimestampProcessed(XtDisplay(w)) - lasttime) >
                        (Time) XtGetMultiClickTime(XtDisplay(w))) {
                XtCallActionProc(w, "select-start", event,
                                 params, *num_params);
        }
        else {
                XtCallActionProc(w, "Update", event,
                                 params, *num_params);
        }
        lasttime = XtLastTimestampProcessed(XtDisplay(w));
}

/*
 * Function: GetFontWidth(widget)
 * based on code from Xaw/TextSink.c
 * mdb 7/26/96
 */

static unsigned long
GetFontWidth(w)
Widget w;
{
  TextSinkObject sink = (TextSinkObject) w;
  Atom XA_FIGURE_WIDTH;
  unsigned long figure_width = 0;
  XFontStruct *font;
  Arg args[1];

  XtSetArg(args[0], XtNfont, &font);
  XtGetValues (w, args, 1);

/*
 * Find the figure width of the current font.
 */

  XA_FIGURE_WIDTH = XInternAtom(XtDisplayOfObject(w), "FIGURE_WIDTH", FALSE);
  if ( XA_FIGURE_WIDTH != None && 
       ( (!XGetFontProperty(font, XA_FIGURE_WIDTH, &figure_width)) ||
         (figure_width == 0)) ) 
    if (font->per_char && font->min_char_or_byte2 <= '$' &&
        font->max_char_or_byte2 >= '$')
      figure_width = font->per_char['$' - font->min_char_or_byte2].width;
    else
      figure_width = font->max_bounds.width;

  return(figure_width);
}