source: trunk/ncurses/test/railroad.c@ 3003

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/*
 * Author: Thomas E. Dickey <dickey@clark.net> 2000
 *
 * $Id: railroad.c,v 1.11 2002/10/19 22:11:24 tom Exp $
 *
 * A simple demo of the termcap interface.
 */
#include <test.priv.h>

static char *wipeit;
static char *moveit;
static int length;
static int height;

static char *finisC;
static char *finisS;
static char *finisU;

static char *startC;
static char *startS;
static char *startU;

static char *backup;

static bool interrupted = FALSE;

static int
outc(int c)
{
    if (interrupted) {
        char tmp = c;
        write(STDOUT_FILENO, &tmp, 1);
    } else {
        putc(c, stdout);
    }
    return 0;
}

static void
PutChar(int ch)
{
    putchar(ch);
    fflush(stdout);
    napms(moveit ? 10 : 50);    /* not really termcap... */
}

static void
Backup(void)
{
    tputs(backup != 0 ? backup : "\b", 1, outc);
}

static void
ShowCursor(int flag)
{
    if (startC != 0 && finisC != 0) {
        tputs(flag ? startC : finisC, 1, outc);
    }
}

static void
StandOut(int flag)
{
    if (startS != 0 && finisS != 0) {
        tputs(flag ? startS : finisS, 1, outc);
    }
}

static void
Underline(int flag)
{
    if (startU != 0 && finisU != 0) {
        tputs(flag ? startU : finisU, 1, outc);
    }
}

static void
ShowSign(char *string)
{
    char *base = string;
    int ch, first, last;

    if (moveit != 0) {
        tputs(tgoto(moveit, 0, height - 1), 1, outc);
        tputs(wipeit, 1, outc);
    }

    while (*string != 0) {
        ch = *string;
        if (ch != ' ') {
            if (moveit != 0) {
                for (first = length - 2; first >= (string - base); first--) {
                    if (first < length - 1) {
                        tputs(tgoto(moveit, first + 1, height - 1), 1, outc);
                        PutChar(' ');
                    }
                    tputs(tgoto(moveit, first, height - 1), 1, outc);
                    PutChar(ch);
                }
            } else {
                last = ch;
                if (isalpha(ch)) {
                    first = isupper(ch) ? 'A' : 'a';
                } else if (isdigit(ch)) {
                    first = '0';
                } else {
                    first = ch;
                }
                if (first < last) {
                    Underline(1);
                    while (first < last) {
                        PutChar(first);
                        Backup();
                        first++;
                    }
                    Underline(0);
                }
            }
            if (moveit != 0)
                Backup();
        }
        StandOut(1);
        PutChar(ch);
        StandOut(0);
        fflush(stdout);
        string++;
    }
    if (moveit != 0)
        tputs(wipeit, 1, outc);
    putchar('\n');
}

static void
cleanup(void)
{
    Underline(0);
    StandOut(0);
    ShowCursor(1);
}

static void
onsig(int n GCC_UNUSED)
{
    interrupted = TRUE;
    cleanup();
    ExitProgram(EXIT_FAILURE);
}

static void
railroad(char **args)
{
    NCURSES_CONST char *name = getenv("TERM");
    char buffer[1024];
    char area[1024], *ap = area;
    int j;

    if (name == 0)
        name = "dumb";
    if (tgetent(buffer, name)) {

        wipeit = tgetstr("ce", &ap);
        height = tgetnum("li");
        length = tgetnum("co");
        moveit = tgetstr("cm", &ap);

        if (wipeit == 0
            || moveit == 0
            || height <= 0
            || length <= 0) {
            wipeit = 0;
            moveit = 0;
            height = 0;
            length = 0;
        }

        startS = tgetstr("so", &ap);
        finisS = tgetstr("se", &ap);

        startU = tgetstr("us", &ap);
        finisU = tgetstr("ue", &ap);

        backup = tgetstr("le", &ap);

        startC = tgetstr("ve", &ap);
        finisC = tgetstr("vi", &ap);

        ShowCursor(0);

        for (j = SIGHUP; j <= SIGTERM; j++)
            if (signal(j, SIG_IGN) != SIG_IGN)
                signal(j, onsig);

        while (*args) {
            ShowSign(*args++);
        }
        ShowCursor(1);
    }
}

int
main(int argc, char *argv[])
{
    if (argc > 1) {
        railroad(argv + 1);
    } else {
        static char world[] = "Hello World";
        static char *hello[] =
        {world, 0};
        railroad(hello);
    }
    ExitProgram(EXIT_SUCCESS);
}