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ncurses.c

/****************************************************************************
 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/
/****************************************************************************

NAME
   ncurses.c --- ncurses library exerciser

SYNOPSIS
   ncurses

DESCRIPTION
   An interactive test module for the ncurses library.

AUTHOR
   Author: Eric S. Raymond <esr@snark.thyrsus.com> 1993
           Thomas E. Dickey (beginning revision 1.27 in 1996).

$Id: ncurses.c,v 1.202 2004/02/07 20:24:08 tom Exp $

***************************************************************************/

#include <test.priv.h>

#if HAVE_GETTIMEOFDAY
#if HAVE_SYS_TIME_H && HAVE_SYS_TIME_SELECT
#include <sys/time.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#endif

#if USE_LIBPANEL
#include <panel.h>
#endif

#if USE_LIBMENU
#include <menu.h>
#endif

#if USE_LIBFORM
#include <form.h>
#endif

#ifdef NCURSES_VERSION

#ifdef TRACE
static int save_trace = TRACE_ORDINARY | TRACE_CALLS;
extern int _nc_tracing;
#endif

#else

#define mmask_t chtype        /* not specified in XSI */

#ifdef CURSES_ACS_ARRAY
#define ACS_S3          (CURSES_ACS_ARRAY['p'])       /* scan line 3 */
#define ACS_S7          (CURSES_ACS_ARRAY['r'])       /* scan line 7 */
#define ACS_LEQUAL      (CURSES_ACS_ARRAY['y'])       /* less/equal */
#define ACS_GEQUAL      (CURSES_ACS_ARRAY['z'])       /* greater/equal */
#define ACS_PI          (CURSES_ACS_ARRAY['{'])       /* Pi */
#define ACS_NEQUAL      (CURSES_ACS_ARRAY['|'])       /* not equal */
#define ACS_STERLING    (CURSES_ACS_ARRAY['}'])       /* UK pound sign */
#else
#define ACS_S3          (A_ALTCHARSET + 'p')    /* scan line 3 */
#define ACS_S7          (A_ALTCHARSET + 'r')    /* scan line 7 */
#define ACS_LEQUAL      (A_ALTCHARSET + 'y')    /* less/equal */
#define ACS_GEQUAL      (A_ALTCHARSET + 'z')    /* greater/equal */
#define ACS_PI          (A_ALTCHARSET + '{')    /* Pi */
#define ACS_NEQUAL      (A_ALTCHARSET + '|')    /* not equal */
#define ACS_STERLING    (A_ALTCHARSET + '}')    /* UK pound sign */
#endif

#ifdef CURSES_WACS_ARRAY
#define WACS_S3         (&(CURSES_WACS_ARRAY['p']))   /* scan line 3 */
#define WACS_S7         (&(CURSES_WACS_ARRAY['r']))   /* scan line 7 */
#define WACS_LEQUAL     (&(CURSES_WACS_ARRAY['y']))   /* less/equal */
#define WACS_GEQUAL     (&(CURSES_WACS_ARRAY['z']))   /* greater/equal */
#define WACS_PI         (&(CURSES_WACS_ARRAY['{']))   /* Pi */
#define WACS_NEQUAL     (&(CURSES_WACS_ARRAY['|']))   /* not equal */
#define WACS_STERLING   (&(CURSES_WACS_ARRAY['}']))   /* UK pound sign */
#endif

#endif

#define P(string) printw("%s\n", string)

#define BLANK           ' '   /* this is the background character */

#undef max_colors
static int max_colors;        /* the actual number of colors we'll use */

#undef max_pairs
static int max_pairs;         /* ...and the number of color pairs */

/* The behavior of mvhline, mvvline for negative/zero length is unspecified,
 * though we can rely on negative x/y values to stop the macro.
 */
static void
do_h_line(int y, int x, chtype c, int to)
{
    if ((to) > (x))
      mvhline(y, x, c, (to) - (x));
}

static void
do_v_line(int y, int x, chtype c, int to)
{
    if ((to) > (y))
      mvvline(y, x, c, (to) - (y));
}

/* Common function to allow ^T to toggle trace-mode in the middle of a test
 * so that trace-files can be made smaller.
 */
static int
wGetchar(WINDOW *win)
{
    int c;
#ifdef TRACE
    while ((c = wgetch(win)) == CTRL('T')) {
      if (_nc_tracing) {
          save_trace = _nc_tracing;
          _tracef("TOGGLE-TRACING OFF");
          _nc_tracing = 0;
      } else {
          _nc_tracing = save_trace;
      }
      trace(_nc_tracing);
      if (_nc_tracing)
          _tracef("TOGGLE-TRACING ON");
    }
#else
    c = wgetch(win);
#endif
    return c;
}
#define Getchar() wGetchar(stdscr)

/* replaces wgetnstr(), since we want to be able to edit values */
static void
wGetstring(WINDOW *win, char *buffer, int limit)
{
    int y0, x0, x, ch;
    bool done = FALSE;

    echo();
    getyx(win, y0, x0);
    wattrset(win, A_REVERSE);

    x = strlen(buffer);
    while (!done) {
      if (x > (int) strlen(buffer))
          x = (int) strlen(buffer);
      wmove(win, y0, x0);
      wprintw(win, "%-*s", limit, buffer);
      wmove(win, y0, x0 + x);
      switch (ch = wGetchar(win)) {
      case '\n':
      case KEY_ENTER:
          done = TRUE;
          break;
      case CTRL('U'):
          *buffer = '\0';
          break;
      case '\b':
      case KEY_BACKSPACE:
      case KEY_DC:
          if (x > 0) {
            int j;
            for (j = --x; (buffer[j] = buffer[j + 1]) != '\0'; ++j) {
                ;
            }
          } else {
            beep();
          }
          break;
      case KEY_LEFT:
          if (x > 0) {
            --x;
          } else {
            flash();
          }
          break;
      case KEY_RIGHT:
          ++x;
          break;
      default:
          if (!isprint(ch) || ch >= KEY_MIN) {
            beep();
          } else if ((int) strlen(buffer) < limit) {
            int j;
            for (j = strlen(buffer) + 1; j > x; --j) {
                buffer[j] = buffer[j - 1];
            }
            buffer[x++] = ch;
          } else {
            flash();
          }
      }
    }

    wattroff(win, A_REVERSE);
    wmove(win, y0, x0);
    noecho();
}

#if USE_WIDEC_SUPPORT
static int
wGet_wchar(WINDOW *win, wint_t * result)
{
    int c;
#ifdef TRACE
    while ((c = wget_wch(win, result)) == CTRL('T')) {
      if (_nc_tracing) {
          save_trace = _nc_tracing;
          _tracef("TOGGLE-TRACING OFF");
          _nc_tracing = 0;
      } else {
          _nc_tracing = save_trace;
      }
      trace(_nc_tracing);
      if (_nc_tracing)
          _tracef("TOGGLE-TRACING ON");
    }
#else
    c = wget_wch(win, result);
#endif
    return c;
}
#define Get_wchar(result) wGet_wchar(stdscr, result)

/* replaces wgetn_wstr(), since we want to be able to edit values */
static void
wGet_wstring(WINDOW *win, wchar_t * buffer, int limit)
{
    int y0, x0, x;
    wint_t ch;
    bool done = FALSE;

    echo();
    getyx(win, y0, x0);
    wattrset(win, A_REVERSE);

    x = wcslen(buffer);
    while (!done) {
      if (x > (int) wcslen(buffer))
          x = (int) wcslen(buffer);
      wmove(win, y0, x0);
      waddnwstr(win, buffer, limit);
      if (x < limit)
          wprintw(win, "%*s", limit - x, " ");
      wmove(win, y0, x0 + x);
      switch (wGet_wchar(win, &ch)) {
      case KEY_CODE_YES:
          switch (ch) {
          case KEY_ENTER:
            ch = '\n';
            break;
          case KEY_BACKSPACE:
          case KEY_DC:
            ch = '\b';
            break;
          case KEY_LEFT:
          case KEY_RIGHT:
            break;
          default:
            ch = (wint_t) - 1;
            break;
          }
      case OK:
          break;
      default:
          ch = (wint_t) - 1;
          break;
      }

      switch (ch) {
      case '\n':
          done = TRUE;
          break;
      case CTRL('U'):
          *buffer = '\0';
          break;
      case '\b':
          if (x > 0) {
            int j;
            for (j = --x; (buffer[j] = buffer[j + 1]) != '\0'; ++j) {
                ;
            }
          } else {
            beep();
          }
          break;
      case KEY_LEFT:
          if (x > 0) {
            --x;
          } else {
            flash();
          }
          break;
      case KEY_RIGHT:
          ++x;
          break;
      default:
          if (!isprint(ch) || ch >= KEY_MIN) {
            beep();
          } else if ((int) wcslen(buffer) < limit) {
            int j;
            for (j = wcslen(buffer) + 1; j > x; --j) {
                buffer[j] = buffer[j - 1];
            }
            buffer[x++] = ch;
          } else {
            flash();
          }
      }
    }

    wattroff(win, A_REVERSE);
    wmove(win, y0, x0);
    noecho();
}

#endif

static void
Pause(void)
{
    move(LINES - 1, 0);
    addstr("Press any key to continue... ");
    (void) Getchar();
}

static void
Cannot(const char *what)
{
    printw("\nThis %s terminal %s\n\n", getenv("TERM"), what);
    Pause();
}

static void
ShellOut(bool message)
{
    if (message)
      addstr("Shelling out...");
    def_prog_mode();
    endwin();
    system("sh");
    if (message)
      addstr("returned from shellout.\n");
    refresh();
}

#ifdef NCURSES_MOUSE_VERSION
static const char *
mouse_decode(MEVENT const *ep)
{
    static char buf[80];

    (void) sprintf(buf, "id %2d  at (%2d, %2d, %2d) state %4lx = {",
               ep->id, ep->x, ep->y, ep->z, ep->bstate);

#define SHOW(m, s) if ((ep->bstate & m)==m) {strcat(buf,s); strcat(buf, ", ");}
    SHOW(BUTTON1_RELEASED, "release-1");
    SHOW(BUTTON1_PRESSED, "press-1");
    SHOW(BUTTON1_CLICKED, "click-1");
    SHOW(BUTTON1_DOUBLE_CLICKED, "doubleclick-1");
    SHOW(BUTTON1_TRIPLE_CLICKED, "tripleclick-1");
    SHOW(BUTTON1_RESERVED_EVENT, "reserved-1");
    SHOW(BUTTON2_RELEASED, "release-2");
    SHOW(BUTTON2_PRESSED, "press-2");
    SHOW(BUTTON2_CLICKED, "click-2");
    SHOW(BUTTON2_DOUBLE_CLICKED, "doubleclick-2");
    SHOW(BUTTON2_TRIPLE_CLICKED, "tripleclick-2");
    SHOW(BUTTON2_RESERVED_EVENT, "reserved-2");
    SHOW(BUTTON3_RELEASED, "release-3");
    SHOW(BUTTON3_PRESSED, "press-3");
    SHOW(BUTTON3_CLICKED, "click-3");
    SHOW(BUTTON3_DOUBLE_CLICKED, "doubleclick-3");
    SHOW(BUTTON3_TRIPLE_CLICKED, "tripleclick-3");
    SHOW(BUTTON3_RESERVED_EVENT, "reserved-3");
    SHOW(BUTTON4_RELEASED, "release-4");
    SHOW(BUTTON4_PRESSED, "press-4");
    SHOW(BUTTON4_CLICKED, "click-4");
    SHOW(BUTTON4_DOUBLE_CLICKED, "doubleclick-4");
    SHOW(BUTTON4_TRIPLE_CLICKED, "tripleclick-4");
    SHOW(BUTTON4_RESERVED_EVENT, "reserved-4");
    SHOW(BUTTON_CTRL, "ctrl");
    SHOW(BUTTON_SHIFT, "shift");
    SHOW(BUTTON_ALT, "alt");
    SHOW(ALL_MOUSE_EVENTS, "all-events");
    SHOW(REPORT_MOUSE_POSITION, "position");
#undef SHOW

    if (buf[strlen(buf) - 1] == ' ')
      buf[strlen(buf) - 2] = '\0';
    (void) strcat(buf, "}");
    return (buf);
}
#endif /* NCURSES_MOUSE_VERSION */

/****************************************************************************
 *
 * Character input test
 *
 ****************************************************************************/

static void
setup_getch(WINDOW *win, bool flags[])
{
    keypad(win, flags['k']);  /* should be redundant, but for testing */
    meta(win, flags['m']);    /* force this to a known state */
    if (flags['e'])
      echo();
    else
      noecho();
}

static void
wgetch_help(WINDOW *win, bool flags[])
{
    static const char *help[] =
    {
      "e -- toggle echo mode"
      ,"g -- triggers a getstr test"
      ,"k -- toggle keypad/literal mode"
      ,"m -- toggle meta (7-bit/8-bit) mode"
      ,"q -- quit (x also exits)"
      ,"s -- shell out\n"
      ,"w -- create a new window"
#ifdef SIGTSTP
      ,"z -- suspend this process"
#endif
    };
    int y, x;
    unsigned chk = ((SIZEOF(help) + 1) / 2);
    unsigned n;

    getyx(win, y, x);
    move(0, 0);
    printw("Type any key to see its %s value.  Also:\n",
         flags['k'] ? "keypad" : "literal");
    for (n = 0; n < SIZEOF(help); ++n) {
      int row = 1 + (n % chk);
      int col = (n >= chk) ? COLS / 2 : 0;
      int flg = ((strstr(help[n], "toggle") != 0)
               && (flags[UChar(*help[n])] != FALSE));
      if (flg)
          standout();
      mvprintw(row, col, "%s", help[n]);
      if (col == 0)
          clrtoeol();
      if (flg)
          standend();
    }
    wrefresh(stdscr);
    wmove(win, y, x);
}

static void
wgetch_wrap(WINDOW *win, int first_y)
{
    int last_y = getmaxy(win) - 1;
    int y = getcury(win) + 1;

    if (y >= last_y)
      y = first_y;
    wmove(win, y, 0);
    wclrtoeol(win);
}

#if defined(NCURSES_VERSION) && defined(KEY_RESIZE) && HAVE_WRESIZE
typedef struct {
    WINDOW *text;
    WINDOW *frame;
} WINSTACK;

static WINSTACK *winstack = 0;
static unsigned len_winstack = 0;

static void
remember_boxes(unsigned level, WINDOW *txt_win, WINDOW *box_win)
{
    unsigned need = (level + 1) * 2;

    if (winstack == 0) {
      len_winstack = 20;
      winstack = (WINSTACK *) malloc(len_winstack * sizeof(WINSTACK));
    } else if (need >= len_winstack) {
      len_winstack = need;
      winstack = (WINSTACK *) realloc(winstack, len_winstack * sizeof(WINSTACK));
    }
    winstack[level].text = txt_win;
    winstack[level].frame = box_win;
}

/*
 * For wgetch_test(), we create pairs of windows - one for a box, one for text.
 * Resize both and paint the box in the parent.
 */
static void
resize_boxes(int level, WINDOW *win)
{
    unsigned n;
    int base = 5;
    int high = LINES - base;
    int wide = COLS;

    touchwin(stdscr);
    wnoutrefresh(stdscr);

    /* FIXME: this chunk should be done in resizeterm() */
    slk_touch();
    slk_clear();
    slk_noutrefresh();

    for (n = 0; (int) n < level; ++n) {
      wresize(winstack[n].frame, high, wide);
      wresize(winstack[n].text, high - 2, wide - 2);
      high -= 2;
      wide -= 2;
      werase(winstack[n].text);
      box(winstack[n].frame, 0, 0);
      wnoutrefresh(winstack[n].frame);
      wprintw(winstack[n].text,
            "size %dx%d\n",
            getmaxy(winstack[n].text),
            getmaxx(winstack[n].text));
      wnoutrefresh(winstack[n].text);
      if (winstack[n].text == win)
          break;
    }
    doupdate();
}
#else
#define remember_boxes(level,text,frame)  /* nothing */
#endif

static void
wgetch_test(int level, WINDOW *win, int delay)
{
    char buf[BUFSIZ];
    int first_y, first_x;
    int c;
    int incount = 0;
    bool flags[256];
    bool blocking = (delay < 0);
    int y, x;

    memset(flags, FALSE, sizeof(flags));
    flags[UChar('k')] = (win == stdscr);

    setup_getch(win, flags);
    wtimeout(win, delay);
    getyx(win, first_y, first_x);

    wgetch_help(win, flags);
    wsetscrreg(win, first_y, getmaxy(win) - 1);
    scrollok(win, TRUE);

    for (;;) {
      while ((c = wGetchar(win)) == ERR) {
          incount++;
          if (blocking) {
            (void) wprintw(win, "%05d: input error", incount);
            break;
          } else {
            (void) wprintw(win, "%05d: input timed out", incount);
          }
          wgetch_wrap(win, first_y);
      }
      if (c == ERR && blocking) {
          wprintw(win, "ERR");
          wgetch_wrap(win, first_y);
      } else if (c == 'x' || c == 'q') {
          break;
      } else if (c == 'e') {
          flags[UChar('e')] = !flags[UChar('e')];
          setup_getch(win, flags);
          wgetch_help(win, flags);
      } else if (c == 'g') {
          waddstr(win, "getstr test: ");
          echo();
          wgetnstr(win, buf, sizeof(buf) - 1);
          noecho();
          wprintw(win, "I saw %d characters:\n\t`%s'.", (int) strlen(buf), buf);
          wclrtoeol(win);
          wgetch_wrap(win, first_y);
      } else if (c == 'k') {
          flags[UChar('k')] = !flags[UChar('k')];
          setup_getch(win, flags);
          wgetch_help(win, flags);
      } else if (c == 'm') {
          flags[UChar('m')] = !flags[UChar('m')];
          setup_getch(win, flags);
          wgetch_help(win, flags);
      } else if (c == 's') {
          ShellOut(TRUE);
      } else if (c == 'w') {
          int high = getmaxy(win) - 1 - first_y + 1;
          int wide = getmaxx(win) - first_x;
          int old_y, old_x;
          int new_y = first_y + getbegy(win);
          int new_x = first_x + getbegx(win);

          getyx(win, old_y, old_x);
          if (high > 2 && wide > 2) {
            WINDOW *wb = newwin(high, wide, new_y, new_x);
            WINDOW *wi = newwin(high - 2, wide - 2, new_y + 1, new_x + 1);

            box(wb, 0, 0);
            wrefresh(wb);
            wmove(wi, 0, 0);
            remember_boxes(level, wi, wb);
            wgetch_test(level + 1, wi, delay);
            delwin(wi);
            delwin(wb);

            wgetch_help(win, flags);
            wmove(win, old_y, old_x);
            touchwin(win);
            wrefresh(win);
            doupdate();
          }
#ifdef SIGTSTP
      } else if (c == 'z') {
          kill(getpid(), SIGTSTP);
#endif
      } else {
          wprintw(win, "Key pressed: %04o ", c);
#ifdef NCURSES_MOUSE_VERSION
          if (c == KEY_MOUSE) {
            MEVENT event;

            getmouse(&event);
            wprintw(win, "KEY_MOUSE, %s", mouse_decode(&event));
            getyx(win, y, x);
            move(event.y, event.x);
            addch('*');
            wmove(win, y, x);
          } else
#endif /* NCURSES_MOUSE_VERSION */
          if (c >= KEY_MIN) {
#if defined(NCURSES_VERSION) && defined(KEY_RESIZE) && HAVE_WRESIZE
            if (c == KEY_RESIZE) {
                resize_boxes(level, win);
            }
#endif
            (void) waddstr(win, keyname(c));
          } else if (c > 0x80) {
            int c2 = (c & 0x7f);
            if (isprint(c2))
                (void) wprintw(win, "M-%c", c2);
            else
                (void) wprintw(win, "M-%s", unctrl(c2));
            waddstr(win, " (high-half character)");
          } else {
            if (isprint(c))
                (void) wprintw(win, "%c (ASCII printable character)", c);
            else
                (void) wprintw(win, "%s (ASCII control character)",
                           unctrl(c));
          }
          wgetch_wrap(win, first_y);
      }
    }

    wtimeout(win, -1);
}

static int
begin_getch_test(void)
{
    char buf[BUFSIZ];
    int delay;

    refresh();

#ifdef NCURSES_MOUSE_VERSION
    mousemask(ALL_MOUSE_EVENTS, (mmask_t *) 0);
#endif

    (void) printw("Delay in 10ths of a second (<CR> for blocking input)? ");
    echo();
    getnstr(buf, sizeof(buf) - 1);
    noecho();
    nonl();

    if (isdigit(UChar(buf[0]))) {
      delay = atoi(buf) * 100;
    } else {
      delay = -1;
    }
    raw();
    move(5, 0);
    return delay;
}

static void
finish_getch_test(void)
{
#ifdef NCURSES_MOUSE_VERSION
    mousemask(0, (mmask_t *) 0);
#endif
    erase();
    noraw();
    nl();
    endwin();
}

static void
getch_test(void)
{
    int delay = begin_getch_test();
    wgetch_test(0, stdscr, delay);
    finish_getch_test();
}

#if USE_WIDEC_SUPPORT
/*
 * For wgetch_test(), we create pairs of windows - one for a box, one for text.
 * Resize both and paint the box in the parent.
 */
#ifdef KEY_RESIZE
static void
resize_wide_boxes(int level, WINDOW *win)
{
    unsigned n;
    int base = 5;
    int high = LINES - base;
    int wide = COLS;

    touchwin(stdscr);
    wnoutrefresh(stdscr);

    /* FIXME: this chunk should be done in resizeterm() */
    slk_touch();
    slk_clear();
    slk_noutrefresh();

    for (n = 0; (int) n < level; ++n) {
      wresize(winstack[n].frame, high, wide);
      wresize(winstack[n].text, high - 2, wide - 2);
      high -= 2;
      wide -= 2;
      werase(winstack[n].text);
      box_set(winstack[n].frame, 0, 0);
      wnoutrefresh(winstack[n].frame);
      wprintw(winstack[n].text,
            "size %dx%d\n",
            getmaxy(winstack[n].text),
            getmaxx(winstack[n].text));
      wnoutrefresh(winstack[n].text);
      if (winstack[n].text == win)
          break;
    }
    doupdate();
}
#endif /* KEY_RESIZE */

static char *
wcstos(const wchar_t * src)
{
    int need;
    mbstate_t state;
    char *result = 0;
    const wchar_t *tmp = src;

    memset(&state, 0, sizeof(state));
    if ((need = wcsrtombs(0, &tmp, 0, &state)) > 0) {
      result = (char *) calloc(need + 1, 1);
      tmp = src;
      if (wcsrtombs(result, &tmp, need, &state) != (size_t) need) {
          free(result);
          result = 0;
      }
    }
    return result;
}

static void
wget_wch_test(int level, WINDOW *win, int delay)
{
    wchar_t buf[BUFSIZ];
    int first_y, first_x;
    wint_t c;
    int incount = 0;
    bool flags[256];
    bool blocking = (delay < 0);
    int y, x, code;
    char *temp;

    memset(flags, FALSE, sizeof(flags));
    flags[UChar('k')] = (win == stdscr);

    setup_getch(win, flags);
    wtimeout(win, delay);
    getyx(win, first_y, first_x);

    wgetch_help(win, flags);
    wsetscrreg(win, first_y, getmaxy(win) - 1);
    scrollok(win, TRUE);

    for (;;) {
      while ((code = wGet_wchar(win, &c)) == ERR) {
          incount++;
          if (blocking) {
            (void) wprintw(win, "%05d: input error", incount);
            break;
          } else {
            (void) wprintw(win, "%05d: input timed out", incount);
          }
          wgetch_wrap(win, first_y);
      }
      if (code == ERR && blocking) {
          wprintw(win, "ERR");
          wgetch_wrap(win, first_y);
      } else if (c == 'x' || c == 'q') {
          break;
      } else if (c == 'e') {
          flags[UChar('e')] = !flags[UChar('e')];
          setup_getch(win, flags);
          wgetch_help(win, flags);
      } else if (c == 'g') {
          waddstr(win, "getstr test: ");
          echo();
          wgetn_wstr(win, (wint_t *) buf, sizeof(buf) - 1);
          noecho();
          if ((temp = wcstos(buf)) != 0) {
            wprintw(win, "I saw %d characters:\n\t`%s'.", wcslen(buf), temp);
            free(temp);
          } else {
            wprintw(win, "I saw %d characters (cannot convert).", wcslen(buf));
          }
          wclrtoeol(win);
          wgetch_wrap(win, first_y);
      } else if (c == 'k') {
          flags[UChar('k')] = !flags[UChar('k')];
          setup_getch(win, flags);
          wgetch_help(win, flags);
      } else if (c == 'm') {
          flags[UChar('m')] = !flags[UChar('m')];
          setup_getch(win, flags);
          wgetch_help(win, flags);
      } else if (c == 's') {
          ShellOut(TRUE);
      } else if (c == 'w') {
          int high = getmaxy(win) - 1 - first_y + 1;
          int wide = getmaxx(win) - first_x;
          int old_y, old_x;
          int new_y = first_y + getbegy(win);
          int new_x = first_x + getbegx(win);

          getyx(win, old_y, old_x);
          if (high > 2 && wide > 2) {
            WINDOW *wb = newwin(high, wide, new_y, new_x);
            WINDOW *wi = newwin(high - 2, wide - 2, new_y + 1, new_x + 1);

            box_set(wb, 0, 0);
            wrefresh(wb);
            wmove(wi, 0, 0);
            remember_boxes(level, wi, wb);
            wget_wch_test(level + 1, wi, delay);
            delwin(wi);
            delwin(wb);

            wgetch_help(win, flags);
            wmove(win, old_y, old_x);
            touchwin(win);
            wrefresh(win);
          }
#ifdef SIGTSTP
      } else if (c == 'z') {
          kill(getpid(), SIGTSTP);
#endif
      } else {
          wprintw(win, "Key pressed: %04o ", c);
#ifdef NCURSES_MOUSE_VERSION
          if (c == KEY_MOUSE) {
            MEVENT event;

            getmouse(&event);
            wprintw(win, "KEY_MOUSE, %s", mouse_decode(&event));
            getyx(win, y, x);
            move(event.y, event.x);
            addch('*');
            wmove(win, y, x);
          } else
#endif /* NCURSES_MOUSE_VERSION */
          if (code == KEY_CODE_YES) {
#ifdef KEY_RESIZE
            if (c == KEY_RESIZE) {
                resize_wide_boxes(level, win);
            }
#endif
            (void) waddstr(win, key_name(c));
          } else {
            if (c < 256 && iscntrl(c)) {
                (void) wprintw(win, "%s (control character)", unctrl(c));
            } else {
                wchar_t c2 = c;
                waddnwstr(win, &c2, 1);
                (void) wprintw(win, " = %#x (printable character)", c);
            }
          }
          wgetch_wrap(win, first_y);
      }
    }

    wtimeout(win, -1);
}

static void
get_wch_test(void)
{
    int delay = begin_getch_test();
    wget_wch_test(0, stdscr, delay);
    finish_getch_test();
}
#endif

/****************************************************************************
 *
 * Character attributes test
 *
 ****************************************************************************/

#define MAX_ATTRSTRING 31
#define LEN_ATTRSTRING 26

static char attr_test_string[] = "abcde fghij klmno pqrst uvwxy z";

static void
adjust_attr_string(int adjust)
{
    int first = ((int) UChar(attr_test_string[0])) + adjust;
    int last = first + LEN_ATTRSTRING;

    if (first >= ' ' && last <= '~') {    /* 32..126 */
      int j, k;
      for (j = 0, k = first; k <= last; ++j, ++k) {
          attr_test_string[j] = k;
          if (((k + 1 - first) % 5) == 0) {
            ++j;
            if (j < MAX_ATTRSTRING)
                attr_test_string[j] = ' ';
          }
      }
      while (j < MAX_ATTRSTRING)
          attr_test_string[j++] = ' ';
      attr_test_string[j] = '\0';
    } else {
      beep();
    }
}

static int
show_attr(int row, int skip, chtype attr, const char *name)
{
    int ncv = tigetnum("ncv");
    chtype test = attr & ~A_ALTCHARSET;

    mvprintw(row, 8, "%s mode:", name);
    mvprintw(row, 24, "|");
    if (skip)
      printw("%*s", skip, " ");
    attrset(attr);
    /*
     * If we're to write a string in the alternate character set, it is not
     * sufficient to just set A_ALTCHARSET.  We have to perform the mapping
     * that corresponds.  This is not needed for vt100-compatible devices
     * because the acs_map[] is 1:1, but for PC-style devices such as Linux
     * console, the acs_map[] is scattered about the range.
     *
     * The addch/addstr functions do not themselves do this mapping, since it
     * is possible to turn off the A_ALTCHARSET flag for the characters which
     * are added, and it would be an unexpected result to have the mapped
     * characters visible on the screen.
     */
    if (attr & A_ALTCHARSET) {
      const char *s;
      int ch;

      for (s = attr_test_string; *s != '\0'; ++s) {
          ch = UChar(*s);
          addch(ch);
      }
    } else {
      addstr(attr_test_string);
    }
    attroff(attr);
    if (skip)
      printw("%*s", skip, " ");
    printw("|");
    if (test != A_NORMAL) {
      if (!(termattrs() & test)) {
          printw(" (N/A)");
      } else if (ncv > 0 && (getbkgd(stdscr) & A_COLOR)) {
          static const chtype table[] =
          {
            A_STANDOUT,
            A_UNDERLINE,
            A_REVERSE,
            A_BLINK,
            A_DIM,
            A_BOLD,
            A_INVIS,
            A_PROTECT,
            A_ALTCHARSET
          };
          unsigned n;
          bool found = FALSE;
          for (n = 0; n < SIZEOF(table); n++) {
            if ((table[n] & attr) != 0
                && ((1 << n) & ncv) != 0) {
                found = TRUE;
                break;
            }
          }
          if (found)
            printw(" (NCV)");
      }
    }
    return row + 2;
}

static bool
attr_getc(int *skip, int *fg, int *bg, int *ac)
{
    int ch = Getchar();

    if (isdigit(ch)) {
      *skip = (ch - '0');
    } else if (ch == CTRL('L')) {
      touchwin(stdscr);
      touchwin(curscr);
      wrefresh(curscr);
    } else {
      switch (ch) {
      case 'a':
          *ac = 0;
          break;
      case 'A':
          *ac = A_ALTCHARSET;
          break;
      case '<':
          adjust_attr_string(-1);
          break;
      case '>':
          adjust_attr_string(1);
          break;
      default:
          if (has_colors()) {
            switch (ch) {
            case 'f':
                *fg = (*fg + 1);
                break;
            case 'F':
                *fg = (*fg - 1);
                break;
            case 'b':
                *bg = (*bg + 1);
                break;
            case 'B':
                *bg = (*bg - 1);
                break;
            default:
                return FALSE;
            }
            if (*fg >= max_colors)
                *fg = 0;
            if (*fg < 0)
                *fg = max_colors - 1;
            if (*bg >= max_colors)
                *bg = 0;
            if (*bg < 0)
                *bg = max_colors - 1;
          }
          break;
      }
    }
    return TRUE;
}

static void
attr_test(void)
/* test text attributes */
{
    int n;
    int skip = tigetnum("xmc");
    int fg = COLOR_BLACK;     /* color pair 0 is special */
    int bg = COLOR_BLACK;
    int ac = 0;
    bool *pairs = (bool *) calloc(max_pairs, sizeof(bool));
    pairs[0] = TRUE;

    if (skip < 0)
      skip = 0;

    n = skip;                 /* make it easy */

    do {
      int row = 2;
      int normal = A_NORMAL | BLANK;

      if (has_colors()) {
          int pair = (fg * max_colors) + bg;
          if (!pairs[pair]) {
            init_pair(pair, fg, bg);
            pairs[pair] = TRUE;
          }
          normal |= COLOR_PAIR(pair);
      }
      bkgd(normal);
      bkgdset(normal);
      erase();

      box(stdscr, 0, 0);
      mvaddstr(0, 20, "Character attribute test display");

      row = show_attr(row, n, ac | A_STANDOUT, "STANDOUT");
      row = show_attr(row, n, ac | A_REVERSE, "REVERSE");
      row = show_attr(row, n, ac | A_BOLD, "BOLD");
      row = show_attr(row, n, ac | A_UNDERLINE, "UNDERLINE");
      row = show_attr(row, n, ac | A_DIM, "DIM");
      row = show_attr(row, n, ac | A_BLINK, "BLINK");
      row = show_attr(row, n, ac | A_PROTECT, "PROTECT");
      row = show_attr(row, n, ac | A_INVIS, "INVISIBLE");
      row = show_attr(row, n, ac | A_NORMAL, "NORMAL");

      mvprintw(row, 8,
             "This terminal does %shave the magic-cookie glitch",
             tigetnum("xmc") > -1 ? "" : "not ");
      mvprintw(row + 1, 8,
             "Enter a digit to set gaps on each side of displayed attributes");
      mvprintw(row + 2, 8,
             "^L repaints, </> shifts, ");
      if (has_colors())
          printw("f/F/b/F toggle color (now %d/%d), a/A ACS (%d)",
               fg, bg, ac != 0);
      else
          printw("a/A ACS (%d)", ac != 0);

      refresh();
    } while (attr_getc(&n, &fg, &bg, &ac));

    free((char *) pairs);
    bkgdset(A_NORMAL | BLANK);
    erase();
    endwin();
}

/****************************************************************************
 *
 * Color support tests
 *
 ****************************************************************************/

static NCURSES_CONST char *the_color_names[] =
{
    "black",
    "red",
    "green",
    "yellow",
    "blue",
    "magenta",
    "cyan",
    "white",
    "BLACK",
    "RED",
    "GREEN",
    "YELLOW",
    "BLUE",
    "MAGENTA",
    "CYAN",
    "WHITE"
};

static void
show_color_name(int y, int x, int color)
{
    if (max_colors > 8)
      mvprintw(y, x, "%02d   ", color);
    else
      mvaddstr(y, x, the_color_names[color]);
}

static void
color_test(void)
/* generate a color test pattern */
{
    int i;
    int base, top, width;
    const char *hello;

    refresh();
    (void) printw("There are %d color pairs\n", COLOR_PAIRS);

    width = (max_colors > 8) ? 4 : 8;
    hello = (max_colors > 8) ? "Test" : "Hello";

    for (base = 0; base < 2; base++) {
      top = (max_colors > 8) ? 0 : base * (max_colors + 3);
      clrtobot();
      (void) mvprintw(top + 1, 0,
                  "%dx%d matrix of foreground/background colors, bright *%s*\n",
                  max_colors, max_colors,
                  base ? "on" : "off");
      for (i = 0; i < max_colors; i++)
          show_color_name(top + 2, (i + 1) * width, i);
      for (i = 0; i < max_colors; i++)
          show_color_name(top + 3 + i, 0, i);
      for (i = 1; i < max_pairs; i++) {
          init_pair(i, i % max_colors, i / max_colors);
          attron((attr_t) COLOR_PAIR(i));
          if (base)
            attron((attr_t) A_BOLD);
          mvaddstr(top + 3 + (i / max_colors), (i % max_colors + 1) *
                 width, hello);
          attrset(A_NORMAL);
      }
      if ((max_colors > 8) || base)
          Pause();
    }

    erase();
    endwin();
}

static void
change_color(int current, int field, int value, int usebase)
{
    short red, green, blue;

    if (usebase)
      color_content(current, &red, &green, &blue);
    else
      red = green = blue = 0;

    switch (field) {
    case 0:
      red += value;
      break;
    case 1:
      green += value;
      break;
    case 2:
      blue += value;
      break;
    }

    if (init_color(current, red, green, blue) == ERR)
      beep();
}

static void
color_edit(void)
/* display the color test pattern, without trying to edit colors */
{
    int i, this_c = 0, value = 0, current = 0, field = 0;
    int last_c;

    refresh();

    for (i = 0; i < max_colors; i++)
      init_pair(i, COLOR_WHITE, i);

    mvprintw(LINES - 2, 0, "Number: %d", value);

    do {
      short red, green, blue;

      attron(A_BOLD);
      mvaddstr(0, 20, "Color RGB Value Editing");
      attroff(A_BOLD);

      for (i = 0; i < max_colors; i++) {
          mvprintw(2 + i, 0, "%c %-8s:",
                 (i == current ? '>' : ' '),
                 (i < (int) SIZEOF(the_color_names)
                  ? the_color_names[i] : ""));
          attrset(COLOR_PAIR(i));
          addstr("        ");
          attrset(A_NORMAL);

          /*
           * Note: this refresh should *not* be necessary!  It works around
           * a bug in attribute handling that apparently causes the A_NORMAL
           * attribute sets to interfere with the actual emission of the
           * color setting somehow.  This needs to be fixed.
           */
          refresh();

          color_content(i, &red, &green, &blue);
          addstr("   R = ");
          if (current == i && field == 0)
            attron(A_STANDOUT);
          printw("%04d", red);
          if (current == i && field == 0)
            attrset(A_NORMAL);
          addstr(", G = ");
          if (current == i && field == 1)
            attron(A_STANDOUT);
          printw("%04d", green);
          if (current == i && field == 1)
            attrset(A_NORMAL);
          addstr(", B = ");
          if (current == i && field == 2)
            attron(A_STANDOUT);
          printw("%04d", blue);
          if (current == i && field == 2)
            attrset(A_NORMAL);
          attrset(A_NORMAL);
          addstr(")");
      }

      mvaddstr(max_colors + 3, 0,
             "Use up/down to select a color, left/right to change fields.");
      mvaddstr(max_colors + 4, 0,
             "Modify field by typing nnn=, nnn-, or nnn+.  ? for help.");

      move(2 + current, 0);

      last_c = this_c;
      this_c = Getchar();
      if (isdigit(this_c) && !isdigit(last_c))
          value = 0;

      switch (this_c) {
      case KEY_UP:
          current = (current == 0 ? (max_colors - 1) : current - 1);
          break;

      case KEY_DOWN:
          current = (current == (max_colors - 1) ? 0 : current + 1);
          break;

      case KEY_RIGHT:
          field = (field == 2 ? 0 : field + 1);
          break;

      case KEY_LEFT:
          field = (field == 0 ? 2 : field - 1);
          break;

      case '0':
      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
      case '9':
          value = value * 10 + (this_c - '0');
          break;

      case '+':
          change_color(current, field, value, 1);
          break;

      case '-':
          change_color(current, field, -value, 1);
          break;

      case '=':
          change_color(current, field, value, 0);
          break;

      case '?':
          erase();
          P("                      RGB Value Editing Help");
          P("");
          P("You are in the RGB value editor.  Use the arrow keys to select one of");
          P("the fields in one of the RGB triples of the current colors; the one");
          P("currently selected will be reverse-video highlighted.");
          P("");
          P("To change a field, enter the digits of the new value; they are echoed");
          P("as entered.  Finish by typing `='.  The change will take effect instantly.");
          P("To increment or decrement a value, use the same procedure, but finish");
          P("with a `+' or `-'.");
          P("");
          P("To quit, do `x' or 'q'");

          Pause();
          erase();
          break;

      case 'x':
      case 'q':
          break;

      default:
          beep();
          break;
      }
      mvprintw(LINES - 2, 0, "Number: %d", value);
      clrtoeol();
    } while
      (this_c != 'x' && this_c != 'q');

    erase();
    endwin();
}

/****************************************************************************
 *
 * Soft-key label test
 *
 ****************************************************************************/

#define SLK_HELP 17
#define SLK_WORK (SLK_HELP + 3)

static void
slk_help(void)
{
    static const char *table[] =
    {
      "Available commands are:"
      ,""
      ,"^L         -- repaint this message and activate soft keys"
      ,"a/d        -- activate/disable soft keys"
      ,"c          -- set centered format for labels"
      ,"l          -- set left-justified format for labels"
      ,"r          -- set right-justified format for labels"
      ,"[12345678] -- set label; labels are numbered 1 through 8"
      ,"e          -- erase stdscr (should not erase labels)"
      ,"s          -- test scrolling of shortened screen"
#if HAVE_SLK_COLOR
      ,"F/B        -- cycle through foreground/background colors"
#endif
      ,"x, q       -- return to main menu"
      ,""
      ,"Note: if activating the soft keys causes your terminal to scroll up"
      ,"one line, your terminal auto-scrolls when anything is written to the"
      ,"last screen position.  The ncurses code does not yet handle this"
      ,"gracefully."
    };
    unsigned j;

    move(2, 0);
    for (j = 0; j < SIZEOF(table); ++j) {
      P(table[j]);
    }
    refresh();
}

static void
slk_test(void)
/* exercise the soft keys */
{
    int c, fmt = 1;
    char buf[9];
    char *s;
#if HAVE_SLK_COLOR
    short fg = COLOR_BLACK;
    short bg = COLOR_WHITE;
    bool new_color = FALSE;
#endif

    c = CTRL('l');
#if HAVE_SLK_COLOR
    if (has_colors()) {
      new_color = TRUE;
    }
#endif

    do {
#if HAVE_SLK_COLOR
      if (new_color) {
          init_pair(1, bg, fg);
          slk_color(1);
          new_color = FALSE;
          mvprintw(SLK_WORK, 0, "Colors %d/%d\n", fg, bg);
          refresh();
      }
#endif
      move(0, 0);
      switch (c) {
      case CTRL('l'):
          erase();
          attron(A_BOLD);
          mvaddstr(0, 20, "Soft Key Exerciser");
          attroff(A_BOLD);

          slk_help();
          /* fall through */

      case 'a':
          slk_restore();
          break;

      case 'e':
          wclear(stdscr);
          break;

      case 's':
          mvprintw(SLK_WORK, 0, "Press Q to stop the scrolling-test: ");
          while ((c = Getchar()) != 'Q' && (c != ERR))
            addch((chtype) c);
          break;

      case 'd':
          slk_clear();
          break;

      case 'l':
          fmt = 0;
          break;

      case 'c':
          fmt = 1;
          break;

      case 'r':
          fmt = 2;
          break;

      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
          (void) mvaddstr(SLK_WORK, 0, "Please enter the label value: ");
          strcpy(buf, "");
          if ((s = slk_label(c - '0')) != 0) {
            strncpy(buf, s, 8);
          }
          wGetstring(stdscr, buf, 8);
          slk_set((c - '0'), buf, fmt);
          slk_refresh();
          move(SLK_WORK, 0);
          clrtobot();
          break;

      case 'x':
      case 'q':
          goto done;

#if HAVE_SLK_COLOR
      case 'F':
          if (has_colors()) {
            fg = (fg + 1) % max_colors;
            new_color = TRUE;
          }
          break;
      case 'B':
          if (has_colors()) {
            bg = (bg + 1) % max_colors;
            new_color = TRUE;
          }
          break;
#endif

      default:
          beep();
      }
    } while
      ((c = Getchar()) != EOF);

  done:
    erase();
    endwin();
}

#if USE_WIDEC_SUPPORT
static void
wide_slk_test(void)
/* exercise the soft keys */
{
    int c, fmt = 1;
    wchar_t buf[9];
    char *s;
    short fg = COLOR_BLACK;
    short bg = COLOR_WHITE;
    bool new_color = FALSE;

    c = CTRL('l');
    if (has_colors()) {
      new_color = TRUE;
    }
    do {
      if (new_color) {
          init_pair(1, bg, fg);
          slk_color(1);
          new_color = FALSE;
          mvprintw(SLK_WORK, 0, "Colors %d/%d\n", fg, bg);
          refresh();
      }
      move(0, 0);
      switch (c) {
      case CTRL('l'):
          erase();
          attr_on(WA_BOLD, NULL);
          mvaddstr(0, 20, "Soft Key Exerciser");
          attr_off(WA_BOLD, NULL);

          slk_help();
          /* fall through */

      case 'a':
          slk_restore();
          break;

      case 'e':
          wclear(stdscr);
          break;

      case 's':
          mvprintw(SLK_WORK, 0, "Press Q to stop the scrolling-test: ");
          while ((c = Getchar()) != 'Q' && (c != ERR))
            addch((chtype) c);
          break;

      case 'd':
          slk_clear();
          break;

      case 'l':
          fmt = 0;
          break;

      case 'c':
          fmt = 1;
          break;

      case 'r':
          fmt = 2;
          break;

      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
          (void) mvaddstr(SLK_WORK, 0, "Please enter the label value: ");
          *buf = 0;
          if ((s = slk_label(c - '0')) != 0) {
            int j;
            for (j = 0; j < 8; ++j) {
                if ((buf[j] = UChar(s[j])) == 0)
                  break;
            }
            buf[j] = 0;
          }
          wGet_wstring(stdscr, buf, 8);
          slk_wset((c - '0'), buf, fmt);
          slk_refresh();
          move(SLK_WORK, 0);
          clrtobot();
          break;

      case 'x':
      case 'q':
          goto done;

      case 'F':
          if (has_colors()) {
            fg = (fg + 1) % max_colors;
            new_color = TRUE;
          }
          break;
      case 'B':
          if (has_colors()) {
            bg = (bg + 1) % max_colors;
            new_color = TRUE;
          }
          break;

      default:
          beep();
      }
    } while
      ((c = Getchar()) != EOF);

  done:
    erase();
    endwin();
}
#endif

/****************************************************************************
 *
 * Alternate character-set stuff
 *
 ****************************************************************************/

/* ISO 6429:  codes 0x80 to 0x9f may be control characters that cause the
 * terminal to perform functions.  The remaining codes can be graphic.
 */
static void
show_upper_chars(int first)
{
    bool C1 = (first == 128);
    int code;
    int last = first + 31;
    int reply;

    erase();
    attron(A_BOLD);
    mvprintw(0, 20, "Display of %s Character Codes %d to %d",
           C1 ? "C1" : "GR", first, last);
    attroff(A_BOLD);
    refresh();

    for (code = first; code <= last; code++) {
      int row = 4 + ((code - first) % 16);
      int col = ((code - first) / 16) * COLS / 2;
      char tmp[80];
      sprintf(tmp, "%3d (0x%x)", code, code);
      mvprintw(row, col, "%*s: ", COLS / 4, tmp);
      if (C1)
          nodelay(stdscr, TRUE);
      echochar(code);
      if (C1) {
          /* (yes, this _is_ crude) */
          while ((reply = Getchar()) != ERR) {
            addch(reply);
            napms(10);
          }
          nodelay(stdscr, FALSE);
      }
    }
}

static void
show_box_chars(void)
{
    erase();
    attron(A_BOLD);
    mvaddstr(0, 20, "Display of the ACS Line-Drawing Set");
    attroff(A_BOLD);
    refresh();
    box(stdscr, 0, 0);
    /* *INDENT-OFF* */
    mvhline(LINES / 2, 0,        ACS_HLINE, COLS);
    mvvline(0,         COLS / 2, ACS_VLINE, LINES);
    mvaddch(0,         COLS / 2, ACS_TTEE);
    mvaddch(LINES / 2, COLS / 2, ACS_PLUS);
    mvaddch(LINES - 1, COLS / 2, ACS_BTEE);
    mvaddch(LINES / 2, 0,        ACS_LTEE);
    mvaddch(LINES / 2, COLS - 1, ACS_RTEE);
    /* *INDENT-ON* */

}

static int
show_1_acs(int n, const char *name, chtype code)
{
    const int height = 16;
    int row = 4 + (n % height);
    int col = (n / height) * COLS / 2;
    mvprintw(row, col, "%*s : ", COLS / 4, name);
    addch(code);
    return n + 1;
}

static void
show_acs_chars(void)
/* display the ACS character set */
{
    int n;

#define BOTH(name) #name, name

    erase();
    attron(A_BOLD);
    mvaddstr(0, 20, "Display of the ACS Character Set");
    attroff(A_BOLD);
    refresh();

    n = show_1_acs(0, BOTH(ACS_ULCORNER));
    n = show_1_acs(n, BOTH(ACS_URCORNER));
    n = show_1_acs(n, BOTH(ACS_LLCORNER));
    n = show_1_acs(n, BOTH(ACS_LRCORNER));

    n = show_1_acs(n, BOTH(ACS_LTEE));
    n = show_1_acs(n, BOTH(ACS_RTEE));
    n = show_1_acs(n, BOTH(ACS_TTEE));
    n = show_1_acs(n, BOTH(ACS_BTEE));

    n = show_1_acs(n, BOTH(ACS_HLINE));
    n = show_1_acs(n, BOTH(ACS_VLINE));

    n = show_1_acs(n, BOTH(ACS_LARROW));
    n = show_1_acs(n, BOTH(ACS_RARROW));
    n = show_1_acs(n, BOTH(ACS_UARROW));
    n = show_1_acs(n, BOTH(ACS_DARROW));

    n = show_1_acs(n, BOTH(ACS_BLOCK));
    n = show_1_acs(n, BOTH(ACS_BOARD));
    n = show_1_acs(n, BOTH(ACS_LANTERN));
    n = show_1_acs(n, BOTH(ACS_BULLET));
    n = show_1_acs(n, BOTH(ACS_CKBOARD));
    n = show_1_acs(n, BOTH(ACS_DEGREE));
    n = show_1_acs(n, BOTH(ACS_DIAMOND));
    n = show_1_acs(n, BOTH(ACS_PLMINUS));
    n = show_1_acs(n, BOTH(ACS_PLUS));

    n = show_1_acs(n, BOTH(ACS_GEQUAL));
    n = show_1_acs(n, BOTH(ACS_NEQUAL));
    n = show_1_acs(n, BOTH(ACS_LEQUAL));

    n = show_1_acs(n, BOTH(ACS_STERLING));
    n = show_1_acs(n, BOTH(ACS_PI));
    n = show_1_acs(n, BOTH(ACS_S1));
    n = show_1_acs(n, BOTH(ACS_S3));
    n = show_1_acs(n, BOTH(ACS_S7));
    n = show_1_acs(n, BOTH(ACS_S9));
}

static void
acs_display(void)
{
    int c = 'a';

    do {
      switch (c) {
      case 'a':
          show_acs_chars();
          break;
      case 'b':
          show_box_chars();
          break;
      case '0':
      case '1':
      case '2':
      case '3':
          show_upper_chars((c - '0') * 32 + 128);
          break;
      }
      mvprintw(LINES - 3, 0,
             "Note: ANSI terminals may not display C1 characters.");
      mvprintw(LINES - 2, 0,
             "Select: a=ACS, b=box, 0=C1, 1,2,3=GR characters, q=quit");
      refresh();
    } while ((c = Getchar()) != 'x' && c != 'q');

    Pause();
    erase();
    endwin();
}

#if USE_WIDEC_SUPPORT
static void
show_upper_widechars(int first, int repeat)
{
    cchar_t temp;
    wchar_t code;
    int last = first + 31;

    erase();
    attron(A_BOLD);
    mvprintw(0, 20, "Display of Character Codes %d to %d", first, last);
    attroff(A_BOLD);

    for (code = first; code <= last; code++) {
      int row = 4 + ((code - first) % 16);
      int col = ((code - first) / 16) * COLS / 2;
      wchar_t codes[10];
      attr_t attrs = A_NORMAL;
      char tmp[80];
      int count = repeat;

      memset(&codes, 0, sizeof(codes));
      codes[0] = code;
      sprintf(tmp, "%3ld (0x%lx)", (long) code, (long) code);
      mvprintw(row, col, "%*s: ", COLS / 4, tmp);
      setcchar(&temp, codes, attrs, 0, 0);
      do {
          /*
           * This could use add_wch(), but is done for comparison with the
           * normal 'f' test (and to make a test-case for echo_wchar()).
           * The screen will flicker because the erase() at the top of the
           * function is met by the builtin refresh() in echo_wchar().
           */
          echo_wchar(&temp);
      } while (--count > 0);
    }
}

static int
show_1_wacs(int n, const char *name, const cchar_t * code)
{
    const int height = 16;
    int row = 4 + (n % height);
    int col = (n / height) * COLS / 2;
    mvprintw(row, col, "%*s : ", COLS / 4, name);
    add_wchnstr(code, 1);
    return n + 1;
}

static void
show_wacs_chars(void)
/* display the wide-ACS character set */
{
    int n;

/*#define BOTH2(name) #name, &(name) */
#define BOTH2(name) #name, name

    erase();
    attron(A_BOLD);
    mvaddstr(0, 20, "Display of the Wide-ACS Character Set");
    attroff(A_BOLD);
    refresh();

    n = show_1_wacs(0, BOTH2(WACS_ULCORNER));
    n = show_1_wacs(n, BOTH2(WACS_URCORNER));
    n = show_1_wacs(n, BOTH2(WACS_LLCORNER));
    n = show_1_wacs(n, BOTH2(WACS_LRCORNER));

    n = show_1_wacs(n, BOTH2(WACS_LTEE));
    n = show_1_wacs(n, BOTH2(WACS_RTEE));
    n = show_1_wacs(n, BOTH2(WACS_TTEE));
    n = show_1_wacs(n, BOTH2(WACS_BTEE));

    n = show_1_wacs(n, BOTH2(WACS_HLINE));
    n = show_1_wacs(n, BOTH2(WACS_VLINE));

    n = show_1_wacs(n, BOTH2(WACS_LARROW));
    n = show_1_wacs(n, BOTH2(WACS_RARROW));
    n = show_1_wacs(n, BOTH2(WACS_UARROW));
    n = show_1_wacs(n, BOTH2(WACS_DARROW));

    n = show_1_wacs(n, BOTH2(WACS_BLOCK));
    n = show_1_wacs(n, BOTH2(WACS_BOARD));
    n = show_1_wacs(n, BOTH2(WACS_LANTERN));
    n = show_1_wacs(n, BOTH2(WACS_BULLET));
    n = show_1_wacs(n, BOTH2(WACS_CKBOARD));
    n = show_1_wacs(n, BOTH2(WACS_DEGREE));
    n = show_1_wacs(n, BOTH2(WACS_DIAMOND));
    n = show_1_wacs(n, BOTH2(WACS_PLMINUS));
    n = show_1_wacs(n, BOTH2(WACS_PLUS));

#ifdef CURSES_WACS_ARRAY
    n = show_1_wacs(n, BOTH2(WACS_GEQUAL));
    n = show_1_wacs(n, BOTH2(WACS_NEQUAL));
    n = show_1_wacs(n, BOTH2(WACS_LEQUAL));

    n = show_1_wacs(n, BOTH2(WACS_STERLING));
    n = show_1_wacs(n, BOTH2(WACS_PI));
    n = show_1_wacs(n, BOTH2(WACS_S1));
    n = show_1_wacs(n, BOTH2(WACS_S3));
    n = show_1_wacs(n, BOTH2(WACS_S7));
    n = show_1_wacs(n, BOTH2(WACS_S9));
#endif
}

static void
show_wbox_chars(void)
{
    erase();
    attron(A_BOLD);
    mvaddstr(0, 20, "Display of the Wide-ACS Line-Drawing Set");
    attroff(A_BOLD);
    refresh();
    box_set(stdscr, 0, 0);
    /* *INDENT-OFF* */
    mvhline_set(LINES / 2, 0,        WACS_HLINE, COLS);
    mvvline_set(0,         COLS / 2, WACS_VLINE, LINES);
    mvadd_wch(0,           COLS / 2, WACS_TTEE);
    mvadd_wch(LINES / 2,   COLS / 2, WACS_PLUS);
    mvadd_wch(LINES - 1,   COLS / 2, WACS_BTEE);
    mvadd_wch(LINES / 2,   0,        WACS_LTEE);
    mvadd_wch(LINES / 2,   COLS - 1, WACS_RTEE);
    /* *INDENT-ON* */

}

static int
show_2_wacs(int n, const char *name, const char *code)
{
    const int height = 16;
    int row = 4 + (n % height);
    int col = (n / height) * COLS / 2;
    char temp[80];

    mvprintw(row, col, "%*s : ", COLS / 4, name);
    addstr(strcpy(temp, code));
    return n + 1;
}

static void
show_utf8_chars(void)
/* display the wide-ACS character set */
{
    int n;

    erase();
    attron(A_BOLD);
    mvaddstr(0, 20, "Display of the Wide-ACS Character Set");
    attroff(A_BOLD);
    refresh();
    /* *INDENT-OFF* */
    n = show_2_wacs(0, "WACS_ULCORNER",   "\342\224\214");
    n = show_2_wacs(n, "WACS_URCORNER",   "\342\224\220");
    n = show_2_wacs(n, "WACS_LLCORNER",   "\342\224\224");
    n = show_2_wacs(n, "WACS_LRCORNER",   "\342\224\230");

    n = show_2_wacs(n, "WACS_LTEE", "\342\224\234");
    n = show_2_wacs(n, "WACS_RTEE", "\342\224\244");
    n = show_2_wacs(n, "WACS_TTEE", "\342\224\254");
    n = show_2_wacs(n, "WACS_BTEE", "\342\224\264");

    n = show_2_wacs(n, "WACS_HLINE",      "\342\224\200");
    n = show_2_wacs(n, "WACS_VLINE",      "\342\224\202");

    n = show_2_wacs(n, "WACS_LARROW",     "\342\206\220");
    n = show_2_wacs(n, "WACS_RARROW",     "\342\206\222");
    n = show_2_wacs(n, "WACS_UARROW",     "\342\206\221");
    n = show_2_wacs(n, "WACS_DARROW",     "\342\206\223");

    n = show_2_wacs(n, "WACS_BLOCK",      "\342\226\256");
    n = show_2_wacs(n, "WACS_BOARD",      "\342\226\222");
    n = show_2_wacs(n, "WACS_LANTERN",    "\342\230\203");
    n = show_2_wacs(n, "WACS_BULLET",     "\302\267");
    n = show_2_wacs(n, "WACS_CKBOARD",    "\342\226\222");
    n = show_2_wacs(n, "WACS_DEGREE",     "\302\260");
    n = show_2_wacs(n, "WACS_DIAMOND",    "\342\227\206");
    n = show_2_wacs(n, "WACS_PLMINUS",    "\302\261");
    n = show_2_wacs(n, "WACS_PLUS", "\342\224\274");
    n = show_2_wacs(n, "WACS_GEQUAL",     "\342\211\245");
    n = show_2_wacs(n, "WACS_NEQUAL",     "\342\211\240");
    n = show_2_wacs(n, "WACS_LEQUAL",     "\342\211\244");

    n = show_2_wacs(n, "WACS_STERLING",   "\302\243");
    n = show_2_wacs(n, "WACS_PI",   "\317\200");
    n = show_2_wacs(n, "WACS_S1",   "\342\216\272");
    n = show_2_wacs(n, "WACS_S3",   "\342\216\273");
    n = show_2_wacs(n, "WACS_S7",   "\342\216\274");
    n = show_2_wacs(n, "WACS_S9",   "\342\216\275");
    /* *INDENT-ON* */

}

static void
wide_acs_display(void)
{
    int c = 'a';
    int digit = 0;
    int repeat = 0;

    do {
      switch (c) {
      case 'a':
          show_wacs_chars();
          break;
      case 'b':
          show_wbox_chars();
          break;
      case 'u':
          show_utf8_chars();
          break;
      default:
          if (isdigit(c))
            digit = (c - '0');
          else if (c == '+')
            ++digit;
          else if (c == '-' && digit > 0)
            --digit;
          else if (c == '>')
            ++repeat;
          else if (c == '<' && repeat > 0)
            --repeat;
          else {
            beep();
            break;
          }
          show_upper_widechars(digit * 32 + 128, repeat);
          break;
      }
      mvprintw(LINES - 2, 0,
             "Select: a WACS, b box, u UTF-8, 0-9,+/- non-ASCII, </> repeat, q=quit");
      refresh();
    } while ((c = Getchar()) != 'x' && c != 'q');

    Pause();
    erase();
    endwin();
}

#endif

/*
 * Graphic-rendition test (adapted from vttest)
 */
static void
test_sgr_attributes(void)
{
    int pass;

    for (pass = 0; pass < 2; pass++) {
      int normal = ((pass == 0 ? A_NORMAL : A_REVERSE)) | BLANK;

      /* Use non-default colors if possible to exercise bce a little */
      if (has_colors()) {
          init_pair(1, COLOR_WHITE, COLOR_BLUE);
          normal |= COLOR_PAIR(1);
      }
      bkgdset(normal);
      erase();
      mvprintw(1, 20, "Graphic rendition test pattern:");

      mvprintw(4, 1, "vanilla");

#define set_sgr(mask) bkgdset((normal^(mask)));
      set_sgr(A_BOLD);
      mvprintw(4, 40, "bold");

      set_sgr(A_UNDERLINE);
      mvprintw(6, 6, "underline");

      set_sgr(A_BOLD | A_UNDERLINE);
      mvprintw(6, 45, "bold underline");

      set_sgr(A_BLINK);
      mvprintw(8, 1, "blink");

      set_sgr(A_BLINK | A_BOLD);
      mvprintw(8, 40, "bold blink");

      set_sgr(A_UNDERLINE | A_BLINK);
      mvprintw(10, 6, "underline blink");

      set_sgr(A_BOLD | A_UNDERLINE | A_BLINK);
      mvprintw(10, 45, "bold underline blink");

      set_sgr(A_REVERSE);
      mvprintw(12, 1, "negative");

      set_sgr(A_BOLD | A_REVERSE);
      mvprintw(12, 40, "bold negative");

      set_sgr(A_UNDERLINE | A_REVERSE);
      mvprintw(14, 6, "underline negative");

      set_sgr(A_BOLD | A_UNDERLINE | A_REVERSE);
      mvprintw(14, 45, "bold underline negative");

      set_sgr(A_BLINK | A_REVERSE);
      mvprintw(16, 1, "blink negative");

      set_sgr(A_BOLD | A_BLINK | A_REVERSE);
      mvprintw(16, 40, "bold blink negative");

      set_sgr(A_UNDERLINE | A_BLINK | A_REVERSE);
      mvprintw(18, 6, "underline blink negative");

      set_sgr(A_BOLD | A_UNDERLINE | A_BLINK | A_REVERSE);
      mvprintw(18, 45, "bold underline blink negative");

      bkgdset(normal);
      mvprintw(LINES - 2, 1, "%s background. ", pass == 0 ? "Dark" :
             "Light");
      clrtoeol();
      Pause();
    }

    bkgdset(A_NORMAL | BLANK);
    erase();
    endwin();
}

/****************************************************************************
 *
 * Windows and scrolling tester.
 *
 ****************************************************************************/

#define BOTLINES  4     /* number of line stolen from screen bottom */

typedef struct {
    int y, x;
} pair;

#define FRAME struct frame
FRAME
{
    FRAME *next, *last;
    bool do_scroll;
    bool do_keypad;
    WINDOW *wind;
};

#ifdef NCURSES_VERSION
#define keypad_active(win) (win)->_use_keypad
#define scroll_active(win) (win)->_scroll
#else
#define keypad_active(win) FALSE
#define scroll_active(win) FALSE
#endif

/* We need to know if these flags are actually set, so don't look in FRAME.
 * These names are known to work with SVr4 curses as well as ncurses.  The
 * _use_keypad name does not work with Solaris 8.
 */
static bool
HaveKeypad(FRAME * curp)
{
    WINDOW *win = (curp ? curp->wind : stdscr);
    return keypad_active(win);
}

static bool
HaveScroll(FRAME * curp)
{
    WINDOW *win = (curp ? curp->wind : stdscr);
    return scroll_active(win);
}

static void
newwin_legend(FRAME * curp)
{
    static const struct {
      const char *msg;
      int code;
    } legend[] = {
      {
          "^C = create window", 0
      },
      {
          "^N = next window", 0
      },
      {
          "^P = previous window", 0
      },
      {
          "^F = scroll forward", 0
      },
      {
          "^B = scroll backward", 0
      },
      {
          "^K = keypad(%s)", 1
      },
      {
          "^S = scrollok(%s)", 2
      },
      {
          "^W = save window to file", 0
      },
      {
          "^R = restore window", 0
      },
#if HAVE_WRESIZE
      {
          "^X = resize", 0
      },
#endif
      {
          "^Q%s = exit", 3
      }
    };
    size_t n;
    int x;
    bool do_keypad = HaveKeypad(curp);
    bool do_scroll = HaveScroll(curp);
    char buf[BUFSIZ];

    move(LINES - 4, 0);
    for (n = 0; n < SIZEOF(legend); n++) {
      switch (legend[n].code) {
      default:
          strcpy(buf, legend[n].msg);
          break;
      case 1:
          sprintf(buf, legend[n].msg, do_keypad ? "yes" : "no");
          break;
      case 2:
          sprintf(buf, legend[n].msg, do_scroll ? "yes" : "no");
          break;
      case 3:
          sprintf(buf, legend[n].msg, do_keypad ? "/ESC" : "");
          break;
      }
      x = getcurx(stdscr);
      addstr((COLS < (x + 3 + (int) strlen(buf))) ? "\n" : (n ? ", " : ""));
      addstr(buf);
    }
    clrtoeol();
}

static void
transient(FRAME * curp, NCURSES_CONST char *msg)
{
    newwin_legend(curp);
    if (msg) {
      mvaddstr(LINES - 1, 0, msg);
      refresh();
      napms(1000);
    }

    move(LINES - 1, 0);
    printw("%s characters are echoed, window should %sscroll.",
         HaveKeypad(curp) ? "Non-arrow" : "All other",
         HaveScroll(curp) ? "" : "not ");
    clrtoeol();
}

static void
newwin_report(FRAME * curp)
/* report on the cursor's current position, then restore it */
{
    WINDOW *win = (curp != 0) ? curp->wind : stdscr;
    int y, x;

    if (win != stdscr)
      transient(curp, (char *) 0);
    getyx(win, y, x);
    move(LINES - 1, COLS - 17);
    printw("Y = %2d X = %2d", y, x);
    if (win != stdscr)
      refresh();
    else
      wmove(win, y, x);
}

static pair *
selectcell(int uli, int ulj, int lri, int lrj)
/* arrows keys move cursor, return location at current on non-arrow key */
{
    static pair res;          /* result cell */
    int si = lri - uli + 1;   /* depth of the select area */
    int sj = lrj - ulj + 1;   /* width of the select area */
    int i = 0, j = 0;         /* offsets into the select area */

    res.y = uli;
    res.x = ulj;
    for (;;) {
      move(uli + i, ulj + j);
      newwin_report((FRAME *) 0);

      switch (Getchar()) {
      case KEY_UP:
          i += si - 1;
          break;
      case KEY_DOWN:
          i++;
          break;
      case KEY_LEFT:
          j += sj - 1;
          break;
      case KEY_RIGHT:
          j++;
          break;
      case QUIT:
      case ESCAPE:
          return ((pair *) 0);
#ifdef NCURSES_MOUSE_VERSION
      case KEY_MOUSE:
          {
            MEVENT event;

            getmouse(&event);
            if (event.y > uli && event.x > ulj) {
                i = event.y - uli;
                j = event.x - ulj;
            } else {
                beep();
                break;
            }
          }
          /* FALLTHRU */
#endif
      default:
          res.y = uli + i;
          res.x = ulj + j;
          return (&res);
      }
      i %= si;
      j %= sj;
    }
}

static void
outerbox(pair ul, pair lr, bool onoff)
/* draw or erase a box *outside* the given pair of corners */
{
    mvaddch(ul.y - 1, lr.x - 1, onoff ? ACS_ULCORNER : ' ');
    mvaddch(ul.y - 1, lr.x + 1, onoff ? ACS_URCORNER : ' ');
    mvaddch(lr.y + 1, lr.x + 1, onoff ? ACS_LRCORNER : ' ');
    mvaddch(lr.y + 1, ul.x - 1, onoff ? ACS_LLCORNER : ' ');
    move(ul.y - 1, ul.x);
    hline(onoff ? ACS_HLINE : ' ', lr.x - ul.x + 1);
    move(ul.y, ul.x - 1);
    vline(onoff ? ACS_VLINE : ' ', lr.y - ul.y + 1);
    move(lr.y + 1, ul.x);
    hline(onoff ? ACS_HLINE : ' ', lr.x - ul.x + 1);
    move(ul.y, lr.x + 1);
    vline(onoff ? ACS_VLINE : ' ', lr.y - ul.y + 1);
}

static WINDOW *
getwindow(void)
/* Ask user for a window definition */
{
    WINDOW *rwindow;
    pair ul, lr, *tmp;

    move(0, 0);
    clrtoeol();
    addstr("Use arrows to move cursor, anything else to mark corner 1");
    refresh();
    if ((tmp = selectcell(2, 1, LINES - BOTLINES - 2, COLS - 2)) == (pair *) 0)
      return ((WINDOW *) 0);
    memcpy(&ul, tmp, sizeof(pair));
    mvaddch(ul.y - 1, ul.x - 1, ACS_ULCORNER);
    move(0, 0);
    clrtoeol();
    addstr("Use arrows to move cursor, anything else to mark corner 2");
    refresh();
    if ((tmp = selectcell(ul.y, ul.x, LINES - BOTLINES - 2, COLS - 2)) ==
      (pair *) 0)
      return ((WINDOW *) 0);
    memcpy(&lr, tmp, sizeof(pair));

    rwindow = subwin(stdscr, lr.y - ul.y + 1, lr.x - ul.x + 1, ul.y, ul.x);

    outerbox(ul, lr, TRUE);
    refresh();

    wrefresh(rwindow);

    move(0, 0);
    clrtoeol();
    return (rwindow);
}

static void
newwin_move(FRAME * curp, int dy, int dx)
{
    WINDOW *win = (curp != 0) ? curp->wind : stdscr;
    int cur_y, cur_x;
    int max_y, max_x;

    getyx(win, cur_y, cur_x);
    getmaxyx(win, max_y, max_x);
    if ((cur_x += dx) < 0)
      cur_x = 0;
    else if (cur_x >= max_x)
      cur_x = max_x - 1;
    if ((cur_y += dy) < 0)
      cur_y = 0;
    else if (cur_y >= max_y)
      cur_y = max_y - 1;
    wmove(win, cur_y, cur_x);
}

static FRAME *
delete_framed(FRAME * fp, bool showit)
{
    FRAME *np;

    fp->last->next = fp->next;
    fp->next->last = fp->last;

    if (showit) {
      werase(fp->wind);
      wrefresh(fp->wind);
    }
    delwin(fp->wind);

    np = (fp == fp->next) ? 0 : fp->next;
    free(fp);
    return np;
}

static void
acs_and_scroll(void)
/* Demonstrate windows */
{
    int c, i;
    FILE *fp;
    FRAME *current = (FRAME *) 0, *neww;
    WINDOW *usescr = stdscr;

#define DUMPFILE  "screendump"

#ifdef NCURSES_MOUSE_VERSION
    mousemask(BUTTON1_CLICKED, (mmask_t *) 0);
#endif
    c = CTRL('C');
    raw();
    do {
      transient((FRAME *) 0, (char *) 0);
      switch (c) {
      case CTRL('C'):
          neww = (FRAME *) calloc(1, sizeof(FRAME));
          if ((neww->wind = getwindow()) == (WINDOW *) 0)
            goto breakout;

          if (current == 0) { /* First element,  */
            neww->next = neww;      /*   so point it at itself */
            neww->last = neww;
          } else {
            neww->next = current->next;
            neww->last = current;
            neww->last->next = neww;
            neww->next->last = neww;
          }
          current = neww;
          /* SVr4 curses sets the keypad on all newly-created windows to
           * false.  Someone reported that PDCurses makes new windows inherit
           * this flag.  Remove the following 'keypad()' call to test this
           */
          keypad(current->wind, TRUE);
          current->do_keypad = HaveKeypad(current);
          current->do_scroll = HaveScroll(current);
          break;

      case CTRL('N'):   /* go to next window */
          if (current)
            current = current->next;
          break;

      case CTRL('P'):   /* go to previous window */
          if (current)
            current = current->last;
          break;

      case CTRL('F'):   /* scroll current window forward */
          if (current)
            wscrl(current->wind, 1);
          break;

      case CTRL('B'):   /* scroll current window backwards */
          if (current)
            wscrl(current->wind, -1);
          break;

      case CTRL('K'):   /* toggle keypad mode for current */
          if (current) {
            current->do_keypad = !current->do_keypad;
            keypad(current->wind, current->do_keypad);
          }
          break;

      case CTRL('S'):
          if (current) {
            current->do_scroll = !current->do_scroll;
            scrollok(current->wind, current->do_scroll);
          }
          break;

      case CTRL('W'):   /* save and delete window */
          if (current == current->next) {
            transient(current, "Will not save/delete ONLY window");
            break;
          } else if ((fp = fopen(DUMPFILE, "w")) == (FILE *) 0) {
            transient(current, "Can't open screen dump file");
          } else {
            (void) putwin(current->wind, fp);
            (void) fclose(fp);

            current = delete_framed(current, TRUE);
          }
          break;

      case CTRL('R'):   /* restore window */
          if ((fp = fopen(DUMPFILE, "r")) == (FILE *) 0) {
            transient(current, "Can't open screen dump file");
          } else {
            neww = (FRAME *) calloc(1, sizeof(FRAME));

            neww->next = current->next;
            neww->last = current;
            neww->last->next = neww;
            neww->next->last = neww;

            neww->wind = getwin(fp);
            (void) fclose(fp);

            wrefresh(neww->wind);
          }
          break;

#if HAVE_WRESIZE
      case CTRL('X'):   /* resize window */
          if (current) {
            pair *tmp, ul, lr;
            int mx, my;

            move(0, 0);
            clrtoeol();
            addstr("Use arrows to move cursor, anything else to mark new corner");
            refresh();

            getbegyx(current->wind, ul.y, ul.x);

            tmp = selectcell(ul.y, ul.x, LINES - BOTLINES - 2, COLS - 2);
            if (tmp == (pair *) 0) {
                beep();
                break;
            }

            getmaxyx(current->wind, lr.y, lr.x);
            lr.y += (ul.y - 1);
            lr.x += (ul.x - 1);
            outerbox(ul, lr, FALSE);
            wnoutrefresh(stdscr);

            /* strictly cosmetic hack for the test */
            getmaxyx(current->wind, my, mx);
            if (my > tmp->y - ul.y) {
                getyx(current->wind, lr.y, lr.x);
                wmove(current->wind, tmp->y - ul.y + 1, 0);
                wclrtobot(current->wind);
                wmove(current->wind, lr.y, lr.x);
            }
            if (mx > tmp->x - ul.x)
                for (i = 0; i < my; i++) {
                  wmove(current->wind, i, tmp->x - ul.x + 1);
                  wclrtoeol(current->wind);
                }
            wnoutrefresh(current->wind);

            memcpy(&lr, tmp, sizeof(pair));
            (void) wresize(current->wind, lr.y - ul.y + 0, lr.x - ul.x + 0);

            getbegyx(current->wind, ul.y, ul.x);
            getmaxyx(current->wind, lr.y, lr.x);
            lr.y += (ul.y - 1);
            lr.x += (ul.x - 1);
            outerbox(ul, lr, TRUE);
            wnoutrefresh(stdscr);

            wnoutrefresh(current->wind);
            move(0, 0);
            clrtoeol();
            doupdate();
          }
          break;
#endif /* HAVE_WRESIZE */

      case KEY_F(10):   /* undocumented --- use this to test area clears */
          selectcell(0, 0, LINES - 1, COLS - 1);
          clrtobot();
          refresh();
          break;

      case KEY_UP:
          newwin_move(current, -1, 0);
          break;
      case KEY_DOWN:
          newwin_move(current, 1, 0);
          break;
      case KEY_LEFT:
          newwin_move(current, 0, -1);
          break;
      case KEY_RIGHT:
          newwin_move(current, 0, 1);
          break;

      case KEY_BACKSPACE:
          /* FALLTHROUGH */
      case KEY_DC:
          {
            int y, x;
            getyx(current->wind, y, x);
            if (--x < 0) {
                if (--y < 0)
                  break;
                x = getmaxx(current->wind) - 1;
            }
            mvwdelch(current->wind, y, x);
          }
          break;

      case '\r':
          c = '\n';
          /* FALLTHROUGH */

      default:
          if (current)
            waddch(current->wind, (chtype) c);
          else
            beep();
          break;
      }
      newwin_report(current);
      usescr = (current ? current->wind : stdscr);
      wrefresh(usescr);
    } while
      ((c = wGetchar(usescr)) != QUIT
       && !((c == ESCAPE) && (keypad_active(usescr)))
       && (c != ERR));

  breakout:
    while (current != 0)
      current = delete_framed(current, FALSE);

    scrollok(stdscr, TRUE);   /* reset to driver's default */
#ifdef NCURSES_MOUSE_VERSION
    mousemask(0, (mmask_t *) 0);
#endif
    noraw();
    erase();
    endwin();
}

/****************************************************************************
 *
 * Panels tester
 *
 ****************************************************************************/

#if USE_LIBPANEL
static unsigned long nap_msec = 1;

static NCURSES_CONST char *mod[] =
{
    "test ",
    "TEST ",
    "(**) ",
    "*()* ",
    "<--> ",
    "LAST "
};

/*+-------------------------------------------------------------------------
      wait_a_while(msec)
--------------------------------------------------------------------------*/
static void
wait_a_while(unsigned long msec GCC_UNUSED)
{
#if HAVE_NAPMS
    if (nap_msec == 1)
      wGetchar(stdscr);
    else
      napms(nap_msec);
#else
    if (nap_msec == 1)
      wGetchar(stdscr);
    else if (msec > 1000L)
      sleep((int) msec / 1000L);
    else
      sleep(1);
#endif
}                       /* end of wait_a_while */

/*+-------------------------------------------------------------------------
      saywhat(text)
--------------------------------------------------------------------------*/
static void
saywhat(NCURSES_CONST char *text)
{
    wmove(stdscr, LINES - 1, 0);
    wclrtoeol(stdscr);
    waddstr(stdscr, text);
}                       /* end of saywhat */

/*+-------------------------------------------------------------------------
      mkpanel(rows,cols,tly,tlx) - alloc a win and panel and associate them
--------------------------------------------------------------------------*/
static PANEL *
mkpanel(int color, int rows, int cols, int tly, int tlx)
{
    WINDOW *win;
    PANEL *pan = 0;

    if ((win = newwin(rows, cols, tly, tlx)) != 0) {
      if ((pan = new_panel(win)) == 0) {
          delwin(win);
      } else if (has_colors()) {
          int fg = (color == COLOR_BLUE) ? COLOR_WHITE : COLOR_BLACK;
          int bg = color;
          init_pair(color, fg, bg);
          wbkgdset(win, COLOR_PAIR(color) | ' ');
      } else {
          wbkgdset(win, A_BOLD | ' ');
      }
    }
    return pan;
}                       /* end of mkpanel */

/*+-------------------------------------------------------------------------
      rmpanel(pan)
--------------------------------------------------------------------------*/
static void
rmpanel(PANEL * pan)
{
    WINDOW *win = panel_window(pan);
    del_panel(pan);
    delwin(win);
}                       /* end of rmpanel */

/*+-------------------------------------------------------------------------
      pflush()
--------------------------------------------------------------------------*/
static void
pflush(void)
{
    update_panels();
    doupdate();
}                       /* end of pflush */

/*+-------------------------------------------------------------------------
      fill_panel(win)
--------------------------------------------------------------------------*/
static void
fill_panel(PANEL * pan)
{
    WINDOW *win = panel_window(pan);
    int num = ((const char *) panel_userptr(pan))[1];
    int y, x;

    wmove(win, 1, 1);
    wprintw(win, "-pan%c-", num);
    wclrtoeol(win);
    box(win, 0, 0);
    for (y = 2; y < getmaxy(win) - 1; y++) {
      for (x = 1; x < getmaxx(win) - 1; x++) {
          wmove(win, y, x);
          waddch(win, num);
      }
    }
}                       /* end of fill_panel */

static void
demo_panels(void)
{
    int itmp;
    register int y, x;

    refresh();

    for (y = 0; y < LINES - 1; y++) {
      for (x = 0; x < COLS; x++)
          wprintw(stdscr, "%d", (y + x) % 10);
    }
    for (y = 0; y < 5; y++) {
      PANEL *p1;
      PANEL *p2;
      PANEL *p3;
      PANEL *p4;
      PANEL *p5;

      p1 = mkpanel(COLOR_RED,
                 LINES / 2 - 2,
                 COLS / 8 + 1,
                 0,
                 0);
      set_panel_userptr(p1, (NCURSES_CONST void *) "p1");

      p2 = mkpanel(COLOR_GREEN,
                 LINES / 2 + 1,
                 COLS / 7,
                 LINES / 4,
                 COLS / 10);
      set_panel_userptr(p2, (NCURSES_CONST void *) "p2");

      p3 = mkpanel(COLOR_YELLOW,
                 LINES / 4,
                 COLS / 10,
                 LINES / 2,
                 COLS / 9);
      set_panel_userptr(p3, (NCURSES_CONST void *) "p3");

      p4 = mkpanel(COLOR_BLUE,
                 LINES / 2 - 2,
                 COLS / 8,
                 LINES / 2 - 2,
                 COLS / 3);
      set_panel_userptr(p4, (NCURSES_CONST void *) "p4");

      p5 = mkpanel(COLOR_MAGENTA,
                 LINES / 2 - 2,
                 COLS / 8,
                 LINES / 2,
                 COLS / 2 - 2);
      set_panel_userptr(p5, (NCURSES_CONST void *) "p5");

      fill_panel(p1);
      fill_panel(p2);
      fill_panel(p3);
      fill_panel(p4);
      fill_panel(p5);
      hide_panel(p4);
      hide_panel(p5);
      pflush();
      saywhat("press any key to continue");
      wait_a_while(nap_msec);

      saywhat("h3 s1 s2 s4 s5; press any key to continue");
      move_panel(p1, 0, 0);
      hide_panel(p3);
      show_panel(p1);
      show_panel(p2);
      show_panel(p4);
      show_panel(p5);
      pflush();
      wait_a_while(nap_msec);

      saywhat("s1; press any key to continue");
      show_panel(p1);
      pflush();
      wait_a_while(nap_msec);

      saywhat("s2; press any key to continue");
      show_panel(p2);
      pflush();
      wait_a_while(nap_msec);

      saywhat("m2; press any key to continue");
      move_panel(p2, LINES / 3 + 1, COLS / 8);
      pflush();
      wait_a_while(nap_msec);

      saywhat("s3;");
      show_panel(p3);
      pflush();
      wait_a_while(nap_msec);

      saywhat("m3; press any key to continue");
      move_panel(p3, LINES / 4 + 1, COLS / 15);
      pflush();
      wait_a_while(nap_msec);

      saywhat("b3; press any key to continue");
      bottom_panel(p3);
      pflush();
      wait_a_while(nap_msec);

      saywhat("s4; press any key to continue");
      show_panel(p4);
      pflush();
      wait_a_while(nap_msec);

      saywhat("s5; press any key to continue");
      show_panel(p5);
      pflush();
      wait_a_while(nap_msec);

      saywhat("t3; press any key to continue");
      top_panel(p3);
      pflush();
      wait_a_while(nap_msec);

      saywhat("t1; press any key to continue");
      top_panel(p1);
      pflush();
      wait_a_while(nap_msec);

      saywhat("t2; press any key to continue");
      top_panel(p2);
      pflush();
      wait_a_while(nap_msec);

      saywhat("t3; press any key to continue");
      top_panel(p3);
      pflush();
      wait_a_while(nap_msec);

      saywhat("t4; press any key to continue");
      top_panel(p4);
      pflush();
      wait_a_while(nap_msec);

      for (itmp = 0; itmp < 6; itmp++) {
          WINDOW *w4 = panel_window(p4);
          WINDOW *w5 = panel_window(p5);

          saywhat("m4; press any key to continue");
          wmove(w4, LINES / 8, 1);
          waddstr(w4, mod[itmp]);
          move_panel(p4, LINES / 6, itmp * (COLS / 8));
          wmove(w5, LINES / 6, 1);
          waddstr(w5, mod[itmp]);
          pflush();
          wait_a_while(nap_msec);

          saywhat("m5; press any key to continue");
          wmove(w4, LINES / 6, 1);
          waddstr(w4, mod[itmp]);
          move_panel(p5, LINES / 3 - 1, (itmp * 10) + 6);
          wmove(w5, LINES / 8, 1);
          waddstr(w5, mod[itmp]);
          pflush();
          wait_a_while(nap_msec);
      }

      saywhat("m4; press any key to continue");
      move_panel(p4, LINES / 6, itmp * (COLS / 8));
      pflush();
      wait_a_while(nap_msec);

      saywhat("t5; press any key to continue");
      top_panel(p5);
      pflush();
      wait_a_while(nap_msec);

      saywhat("t2; press any key to continue");
      top_panel(p2);
      pflush();
      wait_a_while(nap_msec);

      saywhat("t1; press any key to continue");
      top_panel(p1);
      pflush();
      wait_a_while(nap_msec);

      saywhat("d2; press any key to continue");
      rmpanel(p2);
      pflush();
      wait_a_while(nap_msec);

      saywhat("h3; press any key to continue");
      hide_panel(p3);
      pflush();
      wait_a_while(nap_msec);

      saywhat("d1; press any key to continue");
      rmpanel(p1);
      pflush();
      wait_a_while(nap_msec);

      saywhat("d4; press any key to continue");
      rmpanel(p4);
      pflush();
      wait_a_while(nap_msec);

      saywhat("d5; press any key to continue");
      rmpanel(p5);
      pflush();
      wait_a_while(nap_msec);
      if (nap_msec == 1)
          break;
      nap_msec = 100L;
    }

    erase();
    endwin();
}

/****************************************************************************
 *
 * Pad tester
 *
 ****************************************************************************/

#define GRIDSIZE  3

static bool pending_pan = FALSE;
static bool show_panner_legend = TRUE;

static int
panner_legend(int line)
{
    static const char *const legend[] =
    {
      "Use arrow keys (or U,D,L,R) to pan, q to quit, ! to shell-out.",
      "Use +,- (or j,k) to grow/shrink the panner vertically.",
      "Use <,> (or h,l) to grow/shrink the panner horizontally.",
      "Number repeats.  Toggle legend:?, timer:t, scroll mark:s."
    };
    int n = (SIZEOF(legend) - (LINES - line));
    if (line < LINES && (n >= 0)) {
      move(line, 0);
      if (show_panner_legend)
          printw("%s", legend[n]);
      clrtoeol();
      return show_panner_legend;
    }
    return FALSE;
}

static void
panner_h_cleanup(int from_y, int from_x, int to_x)
{
    if (!panner_legend(from_y))
      do_h_line(from_y, from_x, ' ', to_x);
}

static void
panner_v_cleanup(int from_y, int from_x, int to_y)
{
    if (!panner_legend(from_y))
      do_v_line(from_y, from_x, ' ', to_y);
}

static void
panner(WINDOW *pad,
       int top_x, int top_y, int porty, int portx,
       int (*pgetc) (WINDOW *))
{
#if HAVE_GETTIMEOFDAY
    struct timeval before, after;
    bool timing = TRUE;
#endif
    bool scrollers = TRUE;
    int basex = 0;
    int basey = 0;
    int pxmax, pymax, lowend, highend, c;

    getmaxyx(pad, pymax, pxmax);
    scrollok(stdscr, FALSE);  /* we don't want stdscr to scroll! */

    c = KEY_REFRESH;
    do {
#ifdef NCURSES_VERSION
      /*
       * During shell-out, the user may have resized the window.  Adjust
       * the port size of the pad to accommodate this.  Ncurses automatically
       * resizes all of the normal windows to fit on the new screen.
       */
      if (top_x > COLS)
          top_x = COLS;
      if (portx > COLS)
          portx = COLS;
      if (top_y > LINES)
          top_y = LINES;
      if (porty > LINES)
          porty = LINES;
#endif
      switch (c) {
      case KEY_REFRESH:
          erase();

          /* FALLTHRU */
      case '?':
          if (c == '?')
            show_panner_legend = !show_panner_legend;
          panner_legend(LINES - 4);
          panner_legend(LINES - 3);
          panner_legend(LINES - 2);
          panner_legend(LINES - 1);
          break;
#if HAVE_GETTIMEOFDAY
      case 't':
          timing = !timing;
          if (!timing)
            panner_legend(LINES - 1);
          break;
#endif
      case 's':
          scrollers = !scrollers;
          break;

          /* Move the top-left corner of the pad, keeping the bottom-right
           * corner fixed.
           */
      case 'h':         /* increase-columns: move left edge to left */
          if (top_x <= 0)
            beep();
          else {
            panner_v_cleanup(top_y, top_x, porty);
            top_x--;
          }
          break;

      case 'j':         /* decrease-lines: move top-edge down */
          if (top_y >= porty)
            beep();
          else {
            panner_h_cleanup(top_y - 1, top_x - (top_x > 0), portx);
            top_y++;
          }
          break;

      case 'k':         /* increase-lines: move top-edge up */
          if (top_y <= 0)
            beep();
          else {
            top_y--;
            panner_h_cleanup(top_y, top_x, portx);
          }
          break;

      case 'l':         /* decrease-columns: move left-edge to right */
          if (top_x >= portx)
            beep();
          else {
            panner_v_cleanup(top_y - (top_y > 0), top_x - 1, porty);
            top_x++;
          }
          break;

          /* Move the bottom-right corner of the pad, keeping the top-left
           * corner fixed.
           */
      case KEY_IC:            /* increase-columns: move right-edge to right */
          if (portx >= pxmax || portx >= COLS)
            beep();
          else {
            panner_v_cleanup(top_y - (top_y > 0), portx - 1, porty);
            ++portx;
          }
          break;

      case KEY_IL:            /* increase-lines: move bottom-edge down */
          if (porty >= pymax || porty >= LINES)
            beep();
          else {
            panner_h_cleanup(porty - 1, top_x - (top_x > 0), portx);
            ++porty;
          }
          break;

      case KEY_DC:            /* decrease-columns: move bottom edge up */
          if (portx <= top_x)
            beep();
          else {
            portx--;
            panner_v_cleanup(top_y - (top_y > 0), portx, porty);
          }
          break;

      case KEY_DL:            /* decrease-lines */
          if (porty <= top_y)
            beep();
          else {
            porty--;
            panner_h_cleanup(porty, top_x - (top_x > 0), portx);
          }
          break;

      case KEY_LEFT:          /* pan leftwards */
          if (basex > 0)
            basex--;
          else
            beep();
          break;

      case KEY_RIGHT:   /* pan rightwards */
          if (basex + portx - (pymax > porty) < pxmax)
            basex++;
          else
            beep();
          break;

      case KEY_UP:            /* pan upwards */
          if (basey > 0)
            basey--;
          else
            beep();
          break;

      case KEY_DOWN:          /* pan downwards */
          if (basey + porty - (pxmax > portx) < pymax)
            basey++;
          else
            beep();
          break;

      case 'H':
      case KEY_HOME:
      case KEY_FIND:
          basey = 0;
          break;

      case 'E':
      case KEY_END:
      case KEY_SELECT:
          basey = pymax - porty;
          if (basey < 0)
            basey = 0;
          break;

      default:
          beep();
          break;
      }

      mvaddch(top_y - 1, top_x - 1, ACS_ULCORNER);
      do_v_line(top_y, top_x - 1, ACS_VLINE, porty);
      do_h_line(top_y - 1, top_x, ACS_HLINE, portx);

      if (scrollers && (pxmax > portx - 1)) {
          int length = (portx - top_x - 1);
          float ratio = ((float) length) / ((float) pxmax);

          lowend = (int) (top_x + (basex * ratio));
          highend = (int) (top_x + ((basex + length) * ratio));

          do_h_line(porty - 1, top_x, ACS_HLINE, lowend);
          if (highend < portx) {
            attron(A_REVERSE);
            do_h_line(porty - 1, lowend, ' ', highend + 1);
            attroff(A_REVERSE);
            do_h_line(porty - 1, highend + 1, ACS_HLINE, portx);
          }
      } else
          do_h_line(porty - 1, top_x, ACS_HLINE, portx);

      if (scrollers && (pymax > porty - 1)) {
          int length = (porty - top_y - 1);
          float ratio = ((float) length) / ((float) pymax);

          lowend = (int) (top_y + (basey * ratio));
          highend = (int) (top_y + ((basey + length) * ratio));

          do_v_line(top_y, portx - 1, ACS_VLINE, lowend);
          if (highend < porty) {
            attron(A_REVERSE);
            do_v_line(lowend, portx - 1, ' ', highend + 1);
            attroff(A_REVERSE);
            do_v_line(highend + 1, portx - 1, ACS_VLINE, porty);
          }
      } else
          do_v_line(top_y, portx - 1, ACS_VLINE, porty);

      mvaddch(top_y - 1, portx - 1, ACS_URCORNER);
      mvaddch(porty - 1, top_x - 1, ACS_LLCORNER);
      mvaddch(porty - 1, portx - 1, ACS_LRCORNER);

      if (!pending_pan) {
#if HAVE_GETTIMEOFDAY
          gettimeofday(&before, 0);
#endif
          wnoutrefresh(stdscr);

          pnoutrefresh(pad,
                   basey, basex,
                   top_y, top_x,
                   porty - (pxmax > portx) - 1,
                   portx - (pymax > porty) - 1);

          doupdate();
#if HAVE_GETTIMEOFDAY
          if (timing) {
            double elapsed;
            gettimeofday(&after, 0);
            elapsed = (after.tv_sec + after.tv_usec / 1.0e6)
                - (before.tv_sec + before.tv_usec / 1.0e6);
            move(LINES - 1, COLS - 20);
            printw("Secs: %2.03f", elapsed);
            refresh();
          }
#endif
      }

    } while
      ((c = pgetc(pad)) != KEY_EXIT);

    scrollok(stdscr, TRUE);   /* reset to driver's default */
}

static int
padgetch(WINDOW *win)
{
    static int count;
    static int last;
    int c;

    if ((pending_pan = (count > 0)) != FALSE) {
      count--;
      pending_pan = (count != 0);
    } else {
      for (;;) {
          switch (c = wGetchar(win)) {
          case '!':
            ShellOut(FALSE);
            /* FALLTHRU */
          case CTRL('r'):
            endwin();
            refresh();
            c = KEY_REFRESH;
            break;
          case CTRL('l'):
            c = KEY_REFRESH;
            break;
          case 'U':
            c = KEY_UP;
            break;
          case 'D':
            c = KEY_DOWN;
            break;
          case 'R':
            c = KEY_RIGHT;
            break;
          case 'L':
            c = KEY_LEFT;
            break;
          case '+':
            c = KEY_IL;
            break;
          case '-':
            c = KEY_DL;
            break;
          case '>':
            c = KEY_IC;
            break;
          case '<':
            c = KEY_DC;
            break;
          case ERR:           /* FALLTHRU */
          case 'q':
            count = 0;
            c = KEY_EXIT;
            break;
          default:
            if (c >= '0' && c <= '9') {
                count = count * 10 + (c - '0');
                continue;
            }
            break;
          }
          last = c;
          break;
      }
      if (count > 0)
          count--;
    }
    return (last);
}

#define PAD_HIGH 200
#define PAD_WIDE 200

static void
demo_pad(void)
/* Demonstrate pads. */
{
    int i, j;
    unsigned gridcount = 0;
    WINDOW *panpad = newpad(PAD_HIGH, PAD_WIDE);

    if (panpad == 0) {
      Cannot("cannot create requested pad");
      return;
    }

    for (i = 0; i < PAD_HIGH; i++) {
      for (j = 0; j < PAD_WIDE; j++)
          if (i % GRIDSIZE == 0 && j % GRIDSIZE == 0) {
            if (i == 0 || j == 0)
                waddch(panpad, '+');
            else
                waddch(panpad, (chtype) ('A' + (gridcount++ % 26)));
          } else if (i % GRIDSIZE == 0)
            waddch(panpad, '-');
          else if (j % GRIDSIZE == 0)
            waddch(panpad, '|');
          else
            waddch(panpad, ' ');
    }
    panner_legend(LINES - 4);
    panner_legend(LINES - 3);
    panner_legend(LINES - 2);
    panner_legend(LINES - 1);

    keypad(panpad, TRUE);

    /* Make the pad (initially) narrow enough that a trace file won't wrap.
     * We'll still be able to widen it during a test, since that's required
     * for testing boundaries.
     */
    panner(panpad, 2, 2, LINES - 5, COLS - 15, padgetch);

    delwin(panpad);
    endwin();
    erase();
}
#endif /* USE_LIBPANEL */

/****************************************************************************
 *
 * Tests from John Burnell's PDCurses tester
 *
 ****************************************************************************/

static void
Continue(WINDOW *win)
{
    noecho();
    wmove(win, 10, 1);
    mvwaddstr(win, 10, 1, " Press any key to continue");
    wrefresh(win);
    wGetchar(win);
}

static void
flushinp_test(WINDOW *win)
/* Input test, adapted from John Burnell's PDCurses tester */
{
    int w, h, bx, by, sw, sh, i;

    WINDOW *subWin;
    wclear(win);

    getmaxyx(win, h, w);
    getbegyx(win, by, bx);
    sw = w / 3;
    sh = h / 3;
    if ((subWin = subwin(win, sh, sw, by + h - sh - 2, bx + w - sw - 2)) == 0)
      return;

#ifdef A_COLOR
    if (has_colors()) {
      init_pair(2, COLOR_CYAN, COLOR_BLUE);
      wbkgd(subWin, COLOR_PAIR(2) | ' ');
    }
#endif
    wattrset(subWin, A_BOLD);
    box(subWin, ACS_VLINE, ACS_HLINE);
    mvwaddstr(subWin, 2, 1, "This is a subwindow");
    wrefresh(win);

    /*
     * This used to set 'nocbreak()'.  However, Alexander Lukyanov says that
     * it only happened to "work" on SVr4 because that implementation does not
     * emulate nocbreak+noecho mode, whereas ncurses does.  To get the desired
     * test behavior, we're using 'cbreak()', which will allow a single
     * character to return without needing a newline. - T.Dickey 1997/10/11.
     */
    cbreak();
    mvwaddstr(win, 0, 1, "This is a test of the flushinp() call.");

    mvwaddstr(win, 2, 1, "Type random keys for 5 seconds.");
    mvwaddstr(win, 3, 1,
            "These should be discarded (not echoed) after the subwindow goes away.");
    wrefresh(win);

    for (i = 0; i < 5; i++) {
      mvwprintw(subWin, 1, 1, "Time = %d", i);
      wrefresh(subWin);
      napms(1000);
      flushinp();
    }

    delwin(subWin);
    werase(win);
    flash();
    wrefresh(win);
    napms(1000);

    mvwaddstr(win, 2, 1,
            "If you were still typing when the window timer expired,");
    mvwaddstr(win, 3, 1,
            "or else you typed nothing at all while it was running,");
    mvwaddstr(win, 4, 1,
            "test was invalid.  You'll see garbage or nothing at all. ");
    mvwaddstr(win, 6, 1, "Press a key");
    wmove(win, 9, 10);
    wrefresh(win);
    echo();
    wGetchar(win);
    flushinp();
    mvwaddstr(win, 12, 0,
            "If you see any key other than what you typed, flushinp() is broken.");
    Continue(win);

    wmove(win, 9, 10);
    wdelch(win);
    wrefresh(win);
    wmove(win, 12, 0);
    clrtoeol();
    waddstr(win,
          "What you typed should now have been deleted; if not, wdelch() failed.");
    Continue(win);

    cbreak();
}

/****************************************************************************
 *
 * Menu test
 *
 ****************************************************************************/

#if USE_LIBMENU

#define MENU_Y    8
#define MENU_X    8

static int
menu_virtualize(int c)
{
    if (c == '\n' || c == KEY_EXIT)
      return (MAX_COMMAND + 1);
    else if (c == 'u')
      return (REQ_SCR_ULINE);
    else if (c == 'd')
      return (REQ_SCR_DLINE);
    else if (c == 'b' || c == KEY_NPAGE)
      return (REQ_SCR_UPAGE);
    else if (c == 'f' || c == KEY_PPAGE)
      return (REQ_SCR_DPAGE);
    else if (c == 'n' || c == KEY_DOWN)
      return (REQ_NEXT_ITEM);
    else if (c == 'p' || c == KEY_UP)
      return (REQ_PREV_ITEM);
    else if (c == ' ')
      return (REQ_TOGGLE_ITEM);
    else {
      if (c != KEY_MOUSE)
          beep();
      return (c);
    }
}

static const char *animals[] =
{
    "Lions", "Tigers", "Bears", "(Oh my!)", "Newts", "Platypi", "Lemurs",
    (char *) 0
};

static void
menu_test(void)
{
    MENU *m;
    ITEM *items[SIZEOF(animals)];
    ITEM **ip = items;
    const char **ap;
    int mrows, mcols, c;
    WINDOW *menuwin;

#ifdef NCURSES_MOUSE_VERSION
    mousemask(ALL_MOUSE_EVENTS, (mmask_t *) 0);
#endif
    mvaddstr(0, 0, "This is the menu test:");
    mvaddstr(2, 0, "  Use up and down arrow to move the select bar.");
    mvaddstr(3, 0, "  'n' and 'p' act like arrows.");
    mvaddstr(4, 0,
           "  'b' and 'f' scroll up/down (page), 'u' and 'd' (line).");
    mvaddstr(5, 0, "  Press return to exit.");
    refresh();

    for (ap = animals; *ap; ap++)
      *ip++ = new_item(*ap, "");
    *ip = (ITEM *) 0;

    m = new_menu(items);

    set_menu_format(m, (SIZEOF(animals) + 1) / 2, 1);
    scale_menu(m, &mrows, &mcols);

    menuwin = newwin(mrows + 2, mcols + 2, MENU_Y, MENU_X);
    set_menu_win(m, menuwin);
    keypad(menuwin, TRUE);
    box(menuwin, 0, 0);

    set_menu_sub(m, derwin(menuwin, mrows, mcols, 1, 1));

    post_menu(m);

    while ((c = menu_driver(m, menu_virtualize(wGetchar(menuwin)))) != E_UNKNOWN_COMMAND) {
      if (c == E_REQUEST_DENIED)
          beep();
      continue;
    }

    (void) mvprintw(LINES - 2, 0,
                "You chose: %s\n", item_name(current_item(m)));
    (void) addstr("Press any key to continue...");
    wGetchar(stdscr);

    unpost_menu(m);
    delwin(menuwin);

    free_menu(m);
    for (ip = items; *ip; ip++)
      free_item(*ip);
#ifdef NCURSES_MOUSE_VERSION
    mousemask(0, (mmask_t *) 0);
#endif
}

#ifdef TRACE
#define T_TBL(name) { #name, name }
static struct {
    const char *name;
    int mask;
} t_tbl[] = {

    T_TBL(TRACE_DISABLE),
      T_TBL(TRACE_TIMES),
      T_TBL(TRACE_TPUTS),
      T_TBL(TRACE_UPDATE),
      T_TBL(TRACE_MOVE),
      T_TBL(TRACE_CHARPUT),
      T_TBL(TRACE_ORDINARY),
      T_TBL(TRACE_CALLS),
      T_TBL(TRACE_VIRTPUT),
      T_TBL(TRACE_IEVENT),
      T_TBL(TRACE_BITS),
      T_TBL(TRACE_ICALLS),
      T_TBL(TRACE_CCALLS),
      T_TBL(TRACE_DATABASE),
      T_TBL(TRACE_ATTRS),
      T_TBL(TRACE_MAXIMUM),
    {
      (char *) 0, 0
    }
};

static char *
tracetrace(int tlevel)
{
    static char *buf;
    int n;

    if (buf == 0) {
      size_t need = 12;
      for (n = 0; t_tbl[n].name != 0; n++)
          need += strlen(t_tbl[n].name) + 2;
      buf = (char *) malloc(need);
    }
    sprintf(buf, "0x%02x = {", tlevel);
    if (tlevel == 0) {
      sprintf(buf + strlen(buf), "%s, ", t_tbl[0].name);
    } else {
      for (n = 1; t_tbl[n].name != 0; n++)
          if ((tlevel & t_tbl[n].mask) == t_tbl[n].mask) {
            strcat(buf, t_tbl[n].name);
            strcat(buf, ", ");
          }
    }
    if (buf[strlen(buf) - 2] == ',')
      buf[strlen(buf) - 2] = '\0';
    return (strcat(buf, "}"));
}

/* fake a dynamically reconfigurable menu using the 0th entry to deselect
 * the others
 */
static int
run_trace_menu(MENU * m)
{
    ITEM **items;
    ITEM *i, **p;

    for (;;) {
      bool changed = FALSE;
      switch (menu_driver(m, menu_virtualize(wGetchar(menu_win(m))))) {
      case E_UNKNOWN_COMMAND:
          return FALSE;
      default:
          items = menu_items(m);
          i = current_item(m);
          if (i == items[0]) {
            if (item_value(i)) {
                for (p = items + 1; *p != 0; p++)
                  if (item_value(*p)) {
                      set_item_value(*p, FALSE);
                      changed = TRUE;
                  }
            }
          } else {
            for (p = items + 1; *p != 0; p++)
                if (item_value(*p)) {
                  set_item_value(items[0], FALSE);
                  changed = TRUE;
                  break;
                }
          }
          if (!changed)
            return TRUE;
      }
    }
}

static void
trace_set(void)
/* interactively set the trace level */
{
    MENU *m;
    ITEM *items[SIZEOF(t_tbl)];
    ITEM **ip = items;
    int mrows, mcols, newtrace;
    int n;
    WINDOW *menuwin;

    mvaddstr(0, 0, "Interactively set trace level:");
    mvaddstr(2, 0, "  Press space bar to toggle a selection.");
    mvaddstr(3, 0, "  Use up and down arrow to move the select bar.");
    mvaddstr(4, 0, "  Press return to set the trace level.");
    mvprintw(6, 0, "(Current trace level is %s)", tracetrace(_nc_tracing));

    refresh();

    for (n = 0; t_tbl[n].name != 0; n++)
      *ip++ = new_item(t_tbl[n].name, "");
    *ip = (ITEM *) 0;

    m = new_menu(items);

    set_menu_format(m, 0, 2);
    scale_menu(m, &mrows, &mcols);

    menu_opts_off(m, O_ONEVALUE);
    menuwin = newwin(mrows + 2, mcols + 2, MENU_Y, MENU_X);
    set_menu_win(m, menuwin);
    keypad(menuwin, TRUE);
    box(menuwin, 0, 0);

    set_menu_sub(m, derwin(menuwin, mrows, mcols, 1, 1));

    post_menu(m);

    for (ip = menu_items(m); *ip; ip++) {
      int mask = t_tbl[item_index(*ip)].mask;
      if (mask == 0)
          set_item_value(*ip, _nc_tracing == 0);
      else if ((mask & _nc_tracing) == mask)
          set_item_value(*ip, TRUE);
    }

    while (run_trace_menu(m))
      continue;

    newtrace = 0;
    for (ip = menu_items(m); *ip; ip++)
      if (item_value(*ip))
          newtrace |= t_tbl[item_index(*ip)].mask;
    trace(newtrace);
    _tracef("trace level interactively set to %s", tracetrace(_nc_tracing));

    (void) mvprintw(LINES - 2, 0,
                "Trace level is %s\n", tracetrace(_nc_tracing));
    (void) addstr("Press any key to continue...");
    wGetchar(stdscr);

    unpost_menu(m);
    delwin(menuwin);

    free_menu(m);
    for (ip = items; *ip; ip++)
      free_item(*ip);
}
#endif /* TRACE */
#endif /* USE_LIBMENU */

/****************************************************************************
 *
 * Forms test
 *
 ****************************************************************************/
#if USE_LIBFORM
static FIELD *
make_label(int frow, int fcol, NCURSES_CONST char *label)
{
    FIELD *f = new_field(1, strlen(label), frow, fcol, 0, 0);

    if (f) {
      set_field_buffer(f, 0, label);
      set_field_opts(f, field_opts(f) & ~O_ACTIVE);
    }
    return (f);
}

static FIELD *
make_field(int frow, int fcol, int rows, int cols, bool secure)
{
    FIELD *f = new_field(rows, cols, frow, fcol, 0, secure ? 1 : 0);

    if (f) {
      set_field_back(f, A_UNDERLINE);
      set_field_userptr(f, (void *) 0);
    }
    return (f);
}

static void
display_form(FORM * f)
{
    WINDOW *w;
    int rows, cols;

    scale_form(f, &rows, &cols);

    if ((w = newwin(rows + 2, cols + 4, 0, 0)) != (WINDOW *) 0) {
      set_form_win(f, w);
      set_form_sub(f, derwin(w, rows, cols, 1, 2));
      box(w, 0, 0);
      keypad(w, TRUE);
    }

    if (post_form(f) != E_OK)
      wrefresh(w);
}

static void
erase_form(FORM * f)
{
    WINDOW *w = form_win(f);
    WINDOW *s = form_sub(f);

    unpost_form(f);
    werase(w);
    wrefresh(w);
    delwin(s);
    delwin(w);
}

static int
edit_secure(FIELD * me, int c)
{
    int rows, cols, frow, fcol, nrow, nbuf;

    if (field_info(me, &rows, &cols, &frow, &fcol, &nrow, &nbuf) == E_OK
      && nbuf > 0) {
      char temp[80];
      long len;

      strcpy(temp, field_buffer(me, 1));
      len = (long) (char *) field_userptr(me);
      if (c <= KEY_MAX) {
          if (isgraph(c)) {
            temp[len++] = c;
            temp[len] = 0;
            set_field_buffer(me, 1, temp);
            c = '*';
          } else {
            c = 0;
          }
      } else {
          switch (c) {
          case REQ_BEG_FIELD:
          case REQ_CLR_EOF:
          case REQ_CLR_EOL:
          case REQ_DEL_LINE:
          case REQ_DEL_WORD:
          case REQ_DOWN_CHAR:
          case REQ_END_FIELD:
          case REQ_INS_CHAR:
          case REQ_INS_LINE:
          case REQ_LEFT_CHAR:
          case REQ_NEW_LINE:
          case REQ_NEXT_WORD:
          case REQ_PREV_WORD:
          case REQ_RIGHT_CHAR:
          case REQ_UP_CHAR:
            c = 0;            /* we don't want to do inline editing */
            break;
          case REQ_CLR_FIELD:
            if (len) {
                temp[0] = 0;
                set_field_buffer(me, 1, temp);
            }
            break;
          case REQ_DEL_CHAR:
          case REQ_DEL_PREV:
            if (len) {
                temp[--len] = 0;
                set_field_buffer(me, 1, temp);
            }
            break;
          }
      }
      set_field_userptr(me, (void *) len);
    }
    return c;
}

static int
form_virtualize(FORM * f, WINDOW *w)
{
    static const struct {
      int code;
      int result;
    } lookup[] = {
      {
          CTRL('A'), REQ_NEXT_CHOICE
      },
      {
          CTRL('B'), REQ_PREV_WORD
      },
      {
          CTRL('C'), REQ_CLR_EOL
      },
      {
          CTRL('D'), REQ_DOWN_FIELD
      },
      {
          CTRL('E'), REQ_END_FIELD
      },
      {
          CTRL('F'), REQ_NEXT_PAGE
      },
      {
          CTRL('G'), REQ_DEL_WORD
      },
      {
          CTRL('H'), REQ_DEL_PREV
      },
      {
          CTRL('I'), REQ_INS_CHAR
      },
      {
          CTRL('K'), REQ_CLR_EOF
      },
      {
          CTRL('L'), REQ_LEFT_FIELD
      },
      {
          CTRL('M'), REQ_NEW_LINE
      },
      {
          CTRL('N'), REQ_NEXT_FIELD
      },
      {
          CTRL('O'), REQ_INS_LINE
      },
      {
          CTRL('P'), REQ_PREV_FIELD
      },
      {
          CTRL('R'), REQ_RIGHT_FIELD
      },
      {
          CTRL('S'), REQ_BEG_FIELD
      },
      {
          CTRL('U'), REQ_UP_FIELD
      },
      {
          CTRL('V'), REQ_DEL_CHAR
      },
      {
          CTRL('W'), REQ_NEXT_WORD
      },
      {
          CTRL('X'), REQ_CLR_FIELD
      },
      {
          CTRL('Y'), REQ_DEL_LINE
      },
      {
          CTRL('Z'), REQ_PREV_CHOICE
      },
      {
          ESCAPE, MAX_FORM_COMMAND + 1
      },
      {
          KEY_BACKSPACE, REQ_DEL_PREV
      },
      {
          KEY_DOWN, REQ_DOWN_CHAR
      },
      {
          KEY_END, REQ_LAST_FIELD
      },
      {
          KEY_HOME, REQ_FIRST_FIELD
      },
      {
          KEY_LEFT, REQ_LEFT_CHAR
      },
      {
          KEY_LL, REQ_LAST_FIELD
      },
      {
          KEY_NEXT, REQ_NEXT_FIELD
      },
      {
          KEY_NPAGE, REQ_NEXT_PAGE
      },
      {
          KEY_PPAGE, REQ_PREV_PAGE
      },
      {
          KEY_PREVIOUS, REQ_PREV_FIELD
      },
      {
          KEY_RIGHT, REQ_RIGHT_CHAR
      },
      {
          KEY_UP, REQ_UP_CHAR
      },
      {
          QUIT, MAX_FORM_COMMAND + 1
      }
    };

    static int mode = REQ_INS_MODE;
    int c = wGetchar(w);
    unsigned n;
    FIELD *me = current_field(f);

    if (c == CTRL(']')) {
      if (mode == REQ_INS_MODE)
          mode = REQ_OVL_MODE;
      else
          mode = REQ_INS_MODE;
      c = mode;
    } else {
      for (n = 0; n < SIZEOF(lookup); n++) {
          if (lookup[n].code == c) {
            c = lookup[n].result;
            break;
          }
      }
    }

    /*
     * Force the field that the user is typing into to be in reverse video,
     * while the other fields are shown underlined.
     */
    if (c <= KEY_MAX) {
      c = edit_secure(me, c);
      set_field_back(me, A_REVERSE);
    } else if (c <= MAX_FORM_COMMAND) {
      c = edit_secure(me, c);
      set_field_back(me, A_UNDERLINE);
    }
    return c;
}

static int
my_form_driver(FORM * form, int c)
{
    if (c == (MAX_FORM_COMMAND + 1)
      && form_driver(form, REQ_VALIDATION) == E_OK)
      return (TRUE);
    else {
      beep();
      return (FALSE);
    }
}

/*
 * Allow a middle initial, optionally with a '.' to end it.
 */
static bool
mi_field_check(FIELD * fld, const void *data GCC_UNUSED)
{
    char *s = field_buffer(fld, 0);
    int state = 0;
    int n;

    for (n = 0; s[n] != '\0'; ++n) {
      switch (state) {
      case 0:
          if (s[n] == '.') {
            if (n != 1)
                return FALSE;
            state = 2;
          } else if (isspace(UChar(s[n]))) {
            state = 2;
          }
          break;
      case 2:
          if (!isspace(UChar(s[n])))
            return FALSE;
          break;
      }
    }

    /* force the form to display a leading capital */
    if (islower(UChar(s[0]))) {
      s[0] = toupper(UChar(s[0]));
      set_field_buffer(fld, 0, s);
    }
    return TRUE;
}

static bool
mi_char_check(int ch, const void *data GCC_UNUSED)
{
    return ((isalpha(ch) || ch == '.') ? TRUE : FALSE);
}

/*
 * Passwords should be at least 6 characters.
 */
static bool
pw_field_check(FIELD * fld, const void *data GCC_UNUSED)
{
    char *s = field_buffer(fld, 0);
    int n;

    for (n = 0; s[n] != '\0'; ++n) {
      if (isspace(UChar(s[n]))) {
          if (n < 6)
            return FALSE;
      }
    }
    return TRUE;
}

static bool
pw_char_check(int ch, const void *data GCC_UNUSED)
{
    return (isgraph(ch) ? TRUE : FALSE);
}

static void
demo_forms(void)
{
    WINDOW *w;
    FORM *form;
    FIELD *f[12], *secure;
    FIELDTYPE *fty_middle = new_fieldtype(mi_field_check, mi_char_check);
    FIELDTYPE *fty_passwd = new_fieldtype(pw_field_check, pw_char_check);
    int finished = 0, c;
    unsigned n = 0;

    move(18, 0);
    addstr("Defined form-traversal keys:   ^Q/ESC- exit form\n");
    addstr("^N   -- go to next field       ^P  -- go to previous field\n");
    addstr("Home -- go to first field      End -- go to last field\n");
    addstr("^L   -- go to field to left    ^R  -- go to field to right\n");
    addstr("^U   -- move upward to field   ^D  -- move downward to field\n");
    addstr("^W   -- go to next word        ^B  -- go to previous word\n");
    addstr("^S   -- go to start of field   ^E  -- go to end of field\n");
    addstr("^H   -- delete previous char   ^Y  -- delete line\n");
    addstr("^G   -- delete current word    ^C  -- clear to end of line\n");
    addstr("^K   -- clear to end of field  ^X  -- clear field\n");
    addstr("Arrow keys move within a field as you would expect.");

    mvaddstr(4, 57, "Forms Entry Test");

    refresh();

    /* describe the form */
    f[n++] = make_label(0, 15, "Sample Form");

    f[n++] = make_label(2, 0, "Last Name");
    f[n++] = make_field(3, 0, 1, 18, FALSE);
    set_field_type(f[n - 1], TYPE_ALPHA, 1);

    f[n++] = make_label(2, 20, "First Name");
    f[n++] = make_field(3, 20, 1, 12, FALSE);
    set_field_type(f[n - 1], TYPE_ALPHA, 1);

    f[n++] = make_label(2, 34, "Middle Name");
    f[n++] = make_field(3, 34, 1, 12, FALSE);
    set_field_type(f[n - 1], fty_middle);

    f[n++] = make_label(5, 0, "Comments");
    f[n++] = make_field(6, 0, 4, 46, FALSE);

    f[n++] = make_label(5, 20, "Password:");
    secure =
      f[n++] = make_field(5, 30, 1, 9, TRUE);
    set_field_type(f[n - 1], fty_passwd);
    f[n++] = (FIELD *) 0;

    form = new_form(f);

    display_form(form);

    w = form_win(form);
    raw();
    nonl();             /* lets us read ^M's */
    while (!finished) {
      switch (form_driver(form, c = form_virtualize(form, w))) {
      case E_OK:
          mvaddstr(5, 57, field_buffer(secure, 1));
          clrtoeol();
          refresh();
          break;
      case E_UNKNOWN_COMMAND:
          finished = my_form_driver(form, c);
          break;
      default:
          beep();
          break;
      }
    }

    erase_form(form);

    free_form(form);
    for (c = 0; f[c] != 0; c++)
      free_field(f[c]);
    noraw();
    nl();
}
#endif /* USE_LIBFORM */

/****************************************************************************
 *
 * Overlap test
 *
 ****************************************************************************/

static void
fillwin(WINDOW *win, char ch)
{
    int y, x;
    int y1, x1;

    getmaxyx(win, y1, x1);
    for (y = 0; y < y1; y++) {
      wmove(win, y, 0);
      for (x = 0; x < x1; x++)
          waddch(win, ch);
    }
}

static void
crosswin(WINDOW *win, char ch)
{
    int y, x;
    int y1, x1;

    getmaxyx(win, y1, x1);
    for (y = 0; y < y1; y++) {
      for (x = 0; x < x1; x++)
          if (((x > (x1 - 1) / 3) && (x <= (2 * (x1 - 1)) / 3))
            || (((y > (y1 - 1) / 3) && (y <= (2 * (y1 - 1)) / 3)))) {
            wmove(win, y, x);
            waddch(win, ch);
          }
    }
}

static void
overlap_test(void)
/* test effects of overlapping windows */
{
    int ch;

    WINDOW *win1 = newwin(9, 20, 3, 3);
    WINDOW *win2 = newwin(9, 20, 9, 16);

    raw();
    refresh();
    move(0, 0);
    printw("This test shows the behavior of wnoutrefresh() with respect to\n");
    printw("the shared region of two overlapping windows A and B.  The cross\n");
    printw("pattern in each window does not overlap the other.\n");

    move(18, 0);
    printw("a = refresh A, then B, then doupdate. b = refresh B, then A, then doupdaute\n");
    printw("c = fill window A with letter A.      d = fill window B with letter B.\n");
    printw("e = cross pattern in window A.        f = cross pattern in window B.\n");
    printw("g = clear window A.                   h = clear window B.\n");
    printw("i = overwrite A onto B.               j = overwrite B onto A.\n");
    printw("^Q/ESC = terminate test.");

    while ((ch = Getchar()) != QUIT && ch != ESCAPE)
      switch (ch) {
      case 'a':         /* refresh window A first, then B */
          wnoutrefresh(win1);
          wnoutrefresh(win2);
          doupdate();
          break;

      case 'b':         /* refresh window B first, then A */
          wnoutrefresh(win2);
          wnoutrefresh(win1);
          doupdate();
          break;

      case 'c':         /* fill window A so it's visible */
          fillwin(win1, 'A');
          break;

      case 'd':         /* fill window B so it's visible */
          fillwin(win2, 'B');
          break;

      case 'e':         /* cross test pattern in window A */
          crosswin(win1, 'A');
          break;

      case 'f':         /* cross test pattern in window A */
          crosswin(win2, 'B');
          break;

      case 'g':         /* clear window A */
          wclear(win1);
          wmove(win1, 0, 0);
          break;

      case 'h':         /* clear window B */
          wclear(win2);
          wmove(win2, 0, 0);
          break;

      case 'i':         /* overwrite A onto B */
          overwrite(win1, win2);
          break;

      case 'j':         /* overwrite B onto A */
          overwrite(win2, win1);
          break;
      }

    delwin(win2);
    delwin(win1);
    erase();
    endwin();
}

/****************************************************************************
 *
 * Main sequence
 *
 ****************************************************************************/

static bool
do_single_test(const char c)
/* perform a single specified test */
{
    switch (c) {
    case 'a':
      getch_test();
      break;

#if USE_WIDEC_SUPPORT
    case 'A':
      get_wch_test();
      break;
#endif

    case 'b':
      attr_test();
      break;

    case 'c':
      if (!has_colors())
          Cannot("does not support color.");
      else
          color_test();
      break;

    case 'd':
      if (!has_colors())
          Cannot("does not support color.");
      else if (!can_change_color())
          Cannot("has hardwired color values.");
      else
          color_edit();
      break;

    case 'e':
      slk_test();
      break;

#if USE_WIDEC_SUPPORT
    case 'E':
      wide_slk_test();
      break;
#endif
    case 'f':
      acs_display();
      break;

#if USE_WIDEC_SUPPORT
    case 'F':
      wide_acs_display();
      break;
#endif

#if USE_LIBPANEL
    case 'o':
      demo_panels();
      break;
#endif

    case 'g':
      acs_and_scroll();
      break;

    case 'i':
      flushinp_test(stdscr);
      break;

    case 'k':
      test_sgr_attributes();
      break;

#if USE_LIBMENU
    case 'm':
      menu_test();
      break;
#endif

#if USE_LIBPANEL
    case 'p':
      demo_pad();
      break;
#endif

#if USE_LIBFORM
    case 'r':
      demo_forms();
      break;
#endif

    case 's':
      overlap_test();
      break;

#if USE_LIBMENU && defined(TRACE)
    case 't':
      trace_set();
      break;
#endif

    case '?':
      break;

    default:
      return FALSE;
    }

    return TRUE;
}

static void
usage(void)
{
    static const char *const tbl[] =
    {
      "Usage: ncurses [options]"
      ,""
      ,"Options:"
#ifdef NCURSES_VERSION
      ,"  -a f,b   set default-colors (assumed white-on-black)"
      ,"  -d       use default-colors if terminal supports them"
#endif
      ,"  -e fmt   specify format for soft-keys test (e)"
      ,"  -f       rip-off footer line (can repeat)"
      ,"  -h       rip-off header line (can repeat)"
      ,"  -s msec  specify nominal time for panel-demo (default: 1, to hold)"
#ifdef TRACE
      ,"  -t mask  specify default trace-level (may toggle with ^T)"
#endif
    };
    size_t n;
    for (n = 0; n < SIZEOF(tbl); n++)
      fprintf(stderr, "%s\n", tbl[n]);
    ExitProgram(EXIT_FAILURE);
}

static void
set_terminal_modes(void)
{
    noraw();
    cbreak();
    noecho();
    scrollok(stdscr, TRUE);
    idlok(stdscr, TRUE);
    keypad(stdscr, TRUE);
}

#ifdef SIGUSR1
static RETSIGTYPE
announce_sig(int sig)
{
    (void) fprintf(stderr, "Handled signal %d\r\n", sig);
}
#endif

static int
rip_footer(WINDOW *win, int cols)
{
    wbkgd(win, A_REVERSE);
    werase(win);
    wmove(win, 0, 0);
    wprintw(win, "footer: %d columns", cols);
    wnoutrefresh(win);
    return OK;
}

static int
rip_header(WINDOW *win, int cols)
{
    wbkgd(win, A_REVERSE);
    werase(win);
    wmove(win, 0, 0);
    wprintw(win, "header: %d columns", cols);
    wnoutrefresh(win);
    return OK;
}

/*+-------------------------------------------------------------------------
      main(argc,argv)
--------------------------------------------------------------------------*/

int
main(int argc, char *argv[])
{
    int command, c;
    int my_e_param = 1;
#ifdef NCURSES_VERSION
    int default_fg = COLOR_WHITE;
    int default_bg = COLOR_BLACK;
    bool assumed_colors = FALSE;
    bool default_colors = FALSE;
#endif

    setlocale(LC_ALL, "");

    while ((c = getopt(argc, argv, "a:de:fhs:t:")) != EOF) {
      switch (c) {
#ifdef NCURSES_VERSION
      case 'a':
          assumed_colors = TRUE;
          sscanf(optarg, "%d,%d", &default_fg, &default_bg);
          break;
      case 'd':
          default_colors = TRUE;
          break;
#endif
      case 'e':
          my_e_param = atoi(optarg);
#ifdef NCURSES_VERSION
          if (my_e_param > 3) /* allow extended layouts */
            usage();
#else
          if (my_e_param > 1)
            usage();
#endif
          break;
      case 'f':
          ripoffline(-1, rip_footer);
          break;
      case 'h':
          ripoffline(1, rip_header);
          break;
#if USE_LIBPANEL
      case 's':
          nap_msec = atol(optarg);
          break;
#endif
#ifdef TRACE
      case 't':
          save_trace = atoi(optarg);
          break;
#endif
      default:
          usage();
      }
    }

    /*
     * If there's no menus (unlikely for ncurses!), then we'll have to set
     * tracing on initially, just in case the user wants to test something that
     * doesn't involve wGetchar.
     */
#ifdef TRACE
    /* enable debugging */
#if !USE_LIBMENU
    trace(save_trace);
#else
    if (!isatty(fileno(stdin)))
      trace(save_trace);
#endif /* USE_LIBMENU */
#endif /* TRACE */

    /* tell it we're going to play with soft keys */
    slk_init(my_e_param);

#ifdef SIGUSR1
    /* set up null signal catcher so we can see what interrupts to getch do */
    signal(SIGUSR1, announce_sig);
#endif

    /* we must initialize the curses data structure only once */
    initscr();
    bkgdset(BLANK);

    /* tests, in general, will want these modes */
    if (has_colors()) {
      start_color();
#ifdef NCURSES_VERSION_PATCH
      max_colors = COLORS > 16 ? 16 : COLORS;
#if HAVE_USE_DEFAULT_COLORS
      if (default_colors)
          use_default_colors();
#if NCURSES_VERSION_PATCH >= 20000708
      else if (assumed_colors)
          assume_default_colors(default_fg, default_bg);
#endif
#endif
#else /* normal SVr4 curses */
      max_colors = COLORS > 8 ? 8 : COLORS;
#endif
      max_pairs = (max_colors * max_colors);
      if (max_pairs < COLOR_PAIRS)
          max_pairs = COLOR_PAIRS;
    }
    set_terminal_modes();
    def_prog_mode();

    /*
     * Return to terminal mode, so we're guaranteed of being able to
     * select terminal commands even if the capabilities are wrong.
     */
    endwin();

#if HAVE_CURSES_VERSION
    (void) printf("Welcome to %s.  Press ? for help.\n", curses_version());
#elif defined(NCURSES_VERSION_MAJOR) && defined(NCURSES_VERSION_MINOR) && defined(NCURSES_VERSION_PATCH)
    (void) printf("Welcome to ncurses %d.%d.%d.  Press ? for help.\n",
              NCURSES_VERSION_MAJOR,
              NCURSES_VERSION_MINOR,
              NCURSES_VERSION_PATCH);
#else
    (void) puts("Welcome to ncurses.  Press ? for help.");
#endif

    do {
      (void) puts("This is the ncurses main menu");
      (void) puts("a = keyboard and mouse input test");
#if USE_WIDEC_SUPPORT
      (void) puts("A = wide-character keyboard and mouse input test");
#endif
      (void) puts("b = character attribute test");
      (void) puts("c = color test pattern");
      (void) puts("d = edit RGB color values");
      (void) puts("e = exercise soft keys");
#if USE_WIDEC_SUPPORT
      (void) puts("E = exercise soft keys using wide-characters");
#endif
      (void) puts("f = display ACS characters");
#if USE_WIDEC_SUPPORT
      (void) puts("F = display Wide-ACS characters");
#endif
      (void) puts("g = display windows and scrolling");
      (void) puts("i = test of flushinp()");
      (void) puts("k = display character attributes");
#if USE_LIBMENU
      (void) puts("m = menu code test");
#endif
#if USE_LIBPANEL
      (void) puts("o = exercise panels library");
      (void) puts("p = exercise pad features");
      (void) puts("q = quit");
#endif
#if USE_LIBFORM
      (void) puts("r = exercise forms code");
#endif
      (void) puts("s = overlapping-refresh test");
#if USE_LIBMENU && defined(TRACE)
      (void) puts("t = set trace level");
#endif
      (void) puts("? = repeat this command summary");

      (void) fputs("> ", stdout);
      (void) fflush(stdout);  /* necessary under SVr4 curses */

      /*
       * This used to be an 'fgets()' call.  However (on Linux, at least)
       * mixing stream I/O and 'read()' (used in the library) causes the
       * input stream to be flushed when switching between the two.
       */
      command = 0;
      for (;;) {
          char ch;
          if (read(fileno(stdin), &ch, 1) <= 0) {
            if (command == 0)
                command = 'q';
            break;
          } else if (command == 0 && !isspace(UChar(ch))) {
            command = ch;
          } else if (ch == '\n' || ch == '\r') {
            if (command != 0)
                break;
            (void) fputs("> ", stdout);
            (void) fflush(stdout);
          }
      }

      if (do_single_test(command)) {
          /*
           * This may be overkill; it's intended to reset everything back
           * to the initial terminal modes so that tests don't get in
           * each other's way.
           */
          flushinp();
          set_terminal_modes();
          reset_prog_mode();
          clear();
          refresh();
          endwin();
          if (command == '?') {
            (void) puts("This is the ncurses capability tester.");
            (void)
                puts("You may select a test from the main menu by typing the");
            (void)
                puts("key letter of the choice (the letter to left of the =)");
            (void)
                puts("at the > prompt.  The commands `x' or `q' will exit.");
          }
          continue;
      }
    } while
      (command != 'q');

    ExitProgram(EXIT_SUCCESS);
}

/* ncurses.c ends here */

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