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nuttx-apps/examples/pdcurses/tui.c

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/****************************************************************************
* apps/examples/pdcurses/tui.c
* Textual User Interface
*
* Author : P.J. Kunst <kunst@prl.philips.nl>
* Date : 25-02-93
*
* $Id: tui.c,v 1.34 2008/07/14 12:35:23 wmcbrine Exp $
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Adapted by: Gregory Nutt <gnutt@nuttx.org>
*
* Adapted from the original public domain pdcurses by Gregory Nutt and
* released as part of NuttX under the 3-clause BSD license:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include "graphics/curses.h"
#include "tui.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifdef A_COLOR
# define TITLECOLOR 1 /* color pair indices */
# define MAINMENUCOLOR (2 | A_BOLD)
# define MAINMENUREVCOLOR (3 | A_BOLD | A_REVERSE)
# define SUBMENUCOLOR (4 | A_BOLD)
# define SUBMENUREVCOLOR (5 | A_BOLD | A_REVERSE)
# define BODYCOLOR 6
# define STATUSCOLOR (7 | A_BOLD)
# define INPUTBOXCOLOR 8
# define EDITBOXCOLOR (9 | A_BOLD | A_REVERSE)
#else
# define TITLECOLOR 0 /* color pair indices */
# define MAINMENUCOLOR (A_BOLD)
# define MAINMENUREVCOLOR (A_BOLD | A_REVERSE)
# define SUBMENUCOLOR (A_BOLD)
# define SUBMENUREVCOLOR (A_BOLD | A_REVERSE)
# define BODYCOLOR 0
# define STATUSCOLOR (A_BOLD)
# define INPUTBOXCOLOR 0
# define EDITBOXCOLOR (A_BOLD | A_REVERSE)
#endif
#define th 1 /* title window height */
#define mh 1 /* main menu height */
#define sh 2 /* status window height */
#define bh (LINES - th - mh - sh) /* body window height */
#define bw COLS /* body window width */
/****************************************************************************
* Private Data
****************************************************************************/
static WINDOW *wtitl;
static WINDOW *wmain;
static WINDOW *wbody;
static WINDOW *wstat;
static int nextx;
static int nexty;
static int key = ERR;
static int ch = ERR;
static bool quit = false;
static bool incurses = false;
/****************************************************************************
* Private Functions
****************************************************************************/
static char *padstr(char *s, int length)
{
static char buf[MAXSTRLEN];
char fmt[10];
sprintf(fmt, (int)strlen(s) > length ? "%%.%ds" : "%%-%ds", length);
sprintf(buf, fmt, s);
return buf;
}
static char *prepad(char *s, int length)
{
int i;
char *p = s;
if (length > 0)
{
memmove((void *)(s + length), (const void *)s, strlen(s) + 1);
for (i = 0; i < length; i++)
{
*p++ = ' ';
}
}
return s;
}
static void rmline(WINDOW *win, int nr) /* keeps box lines intact */
{
mvwaddstr(win, nr, 1, padstr(" ", bw - 2));
wrefresh(win);
}
static void initcolor(void)
{
#ifdef A_COLOR
if (has_colors())
{
start_color();
}
/* foreground, background */
init_pair(TITLECOLOR & ~A_ATTR, COLOR_BLACK, COLOR_CYAN);
init_pair(MAINMENUCOLOR & ~A_ATTR, COLOR_WHITE, COLOR_CYAN);
init_pair(MAINMENUREVCOLOR & ~A_ATTR, COLOR_WHITE, COLOR_BLACK);
init_pair(SUBMENUCOLOR & ~A_ATTR, COLOR_WHITE, COLOR_CYAN);
init_pair(SUBMENUREVCOLOR & ~A_ATTR, COLOR_WHITE, COLOR_BLACK);
init_pair(BODYCOLOR & ~A_ATTR, COLOR_WHITE, COLOR_BLUE);
init_pair(STATUSCOLOR & ~A_ATTR, COLOR_WHITE, COLOR_CYAN);
init_pair(INPUTBOXCOLOR & ~A_ATTR, COLOR_BLACK, COLOR_CYAN);
init_pair(EDITBOXCOLOR & ~A_ATTR, COLOR_WHITE, COLOR_BLACK);
#endif
}
static void setcolor(WINDOW *win, chtype color)
{
chtype attr = color & A_ATTR; /* extract Bold, Reverse, Blink bits */
#ifdef A_COLOR
attr &= ~A_REVERSE; /* ignore reverse, use colors instead! */
wattrset(win, COLOR_PAIR(color & A_CHARTEXT) | attr);
#else
attr &= ~A_BOLD; /* ignore bold, gives messy display on HP-UX */
wattrset(win, attr);
#endif
}
static void colorbox(WINDOW *win, chtype color, int hasbox)
{
int maxy;
chtype attr = color & A_ATTR; /* extract Bold, Reverse, Blink bits */
setcolor(win, color);
#ifdef A_COLOR
if (has_colors())
{
wbkgd(win, COLOR_PAIR(color & A_CHARTEXT) | (attr & ~A_REVERSE));
}
else
#endif
{
wbkgd(win, attr);
}
werase(win);
maxy = getmaxy(win);
if (hasbox && (maxy > 2))
{
box(win, 0, 0);
}
touchwin(win);
wrefresh(win);
}
static void idle(void)
{
char buf[MAXSTRLEN];
time_t t;
struct tm *tp;
if (time(&t) == -1)
{
return; /* time not available */
}
tp = localtime(&t);
sprintf(buf, " %.2d-%.2d-%.4d %.2d:%.2d:%.2d",
tp->tm_mday, tp->tm_mon + 1, tp->tm_year + 1900,
tp->tm_hour, tp->tm_min, tp->tm_sec);
mvwaddstr(wtitl, 0, bw - strlen(buf) - 2, buf);
wrefresh(wtitl);
}
static void menudim(const menu *mp, int *lines, int *columns)
{
int n;
int l;
int mmax = 0;
for (n = 0; mp->func; n++, mp++)
{
if ((l = strlen(mp->name)) > mmax)
{
mmax = l;
}
}
*lines = n;
*columns = mmax + 2;
}
static void setmenupos(int y, int x)
{
nexty = y;
nextx = x;
}
static void getmenupos(int *y, int *x)
{
*y = nexty;
*x = nextx;
}
static int hotkey(const char *s)
{
int c0 = *s; /* if no upper case found, return first char */
for (; *s; s++)
{
if (isupper((unsigned char)*s))
{
break;
}
}
return *s ? *s : c0;
}
static void repaintmenu(WINDOW *wmenu, const menu *mp)
{
int i;
const menu *p = mp;
for (i = 0; p->func; i++, p++)
{
mvwaddstr(wmenu, i + 1, 2, p->name);
}
touchwin(wmenu);
wrefresh(wmenu);
}
static void repaintmainmenu(int width, menu *mp)
{
int i;
menu *p = mp;
for (i = 0; p->func; i++, p++)
{
mvwaddstr(wmain, 0, i * width, prepad(padstr(p->name, width - 1), 1));
}
touchwin(wmain);
wrefresh(wmain);
}
static void mainhelp(void)
{
#ifdef ALT_X
statusmsg("Use arrow keys and Enter to select (Alt-X to quit)");
#else
statusmsg("Use arrow keys and Enter to select");
#endif
}
static void mainmenu(menu *mp)
{
int nitems, barlen, old = -1, cur = 0, c, cur0;
menudim(mp, &nitems, &barlen);
repaintmainmenu(barlen, mp);
while (!quit)
{
if (cur != old)
{
if (old != -1)
{
mvwaddstr(wmain, 0, old * barlen,
prepad(padstr(mp[old].name, barlen - 1), 1));
statusmsg(mp[cur].desc);
}
else
{
mainhelp();
}
setcolor(wmain, MAINMENUREVCOLOR);
mvwaddstr(wmain, 0, cur * barlen,
prepad(padstr(mp[cur].name, barlen - 1), 1));
setcolor(wmain, MAINMENUCOLOR);
old = cur;
wrefresh(wmain);
}
switch (c = (key != ERR ? key : waitforkey()))
{
case KEY_DOWN:
case '\n': /* menu item selected */
touchwin(wbody);
wrefresh(wbody);
rmerror();
setmenupos(th + mh, cur * barlen);
curs_set(1);
(mp[cur].func) (); /* perform function */
curs_set(0);
switch (key)
{
case KEY_LEFT:
cur = (cur + nitems - 1) % nitems;
key = '\n';
break;
case KEY_RIGHT:
cur = (cur + 1) % nitems;
key = '\n';
break;
default:
key = ERR;
}
repaintmainmenu(barlen, mp);
old = -1;
break;
case KEY_LEFT:
cur = (cur + nitems - 1) % nitems;
break;
case KEY_RIGHT:
cur = (cur + 1) % nitems;
break;
case KEY_ESC:
mainhelp();
break;
default:
cur0 = cur;
do
{
cur = (cur + 1) % nitems;
}
while ((cur != cur0) && (hotkey(mp[cur].name) != toupper(c)));
if (hotkey(mp[cur].name) == toupper(c))
{
key = '\n';
}
}
}
rmerror();
touchwin(wbody);
wrefresh(wbody);
}
static void cleanup(void) /* cleanup curses settings */
{
if (incurses)
{
delwin(wtitl);
delwin(wmain);
delwin(wbody);
delwin(wstat);
curs_set(1);
endwin();
incurses = false;
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
void clsbody(void)
{
werase(wbody);
wmove(wbody, 0, 0);
}
int bodylen(void)
{
return getmaxy(wbody);
}
WINDOW *bodywin(void)
{
return wbody;
}
void rmerror(void)
{
rmline(wstat, 0);
}
void rmstatus(void)
{
rmline(wstat, 1);
}
void titlemsg(char *msg)
{
mvwaddstr(wtitl, 0, 2, padstr(msg, bw - 3));
wrefresh(wtitl);
}
void bodymsg(char *msg)
{
waddstr(wbody, msg);
wrefresh(wbody);
}
void errormsg(char *msg)
{
beep();
mvwaddstr(wstat, 0, 2, padstr(msg, bw - 3));
wrefresh(wstat);
}
void statusmsg(char *msg)
{
mvwaddstr(wstat, 1, 2, padstr(msg, bw - 3));
wrefresh(wstat);
}
bool keypressed(void)
{
ch = wgetch(wbody);
return ch != ERR;
}
int getkey(void)
{
int c = ch;
ch = ERR;
#ifdef ALT_X
quit = (c == ALT_X); /* PC only ! */
#endif
return c;
}
int waitforkey(void)
{
do
{
idle();
}
while (!keypressed());
return getkey();
}
void tui_exit(void) /* terminate program */
{
quit = true;
}
void domenu(const menu *mp)
{
int x;
int y;
int nitems;
int barlen;
int mheight;
int mw;
int old = -1;
int cur = 0;
int cur0;
bool stop = false;
WINDOW *wmenu;
curs_set(0);
getmenupos(&y, &x);
menudim(mp, &nitems, &barlen);
mheight = nitems + 2;
mw = barlen + 2;
wmenu = newwin(mheight, mw, y, x);
colorbox(wmenu, SUBMENUCOLOR, 1);
repaintmenu(wmenu, mp);
key = ERR;
while (!stop && !quit)
{
if (cur != old)
{
if (old != -1)
{
mvwaddstr(wmenu, old + 1, 1,
prepad(padstr(mp[old].name, barlen - 1), 1));
}
setcolor(wmenu, SUBMENUREVCOLOR);
mvwaddstr(wmenu, cur + 1, 1,
prepad(padstr(mp[cur].name, barlen - 1), 1));
setcolor(wmenu, SUBMENUCOLOR);
statusmsg(mp[cur].desc);
old = cur;
wrefresh(wmenu);
}
switch (key = ((key != ERR) ? key : waitforkey()))
{
case '\n': /* menu item selected */
touchwin(wbody);
wrefresh(wbody);
setmenupos(y + 1, x + 1);
rmerror();
key = ERR;
curs_set(1);
(mp[cur].func) (); /* perform function */
curs_set(0);
repaintmenu(wmenu, mp);
old = -1;
break;
case KEY_UP:
cur = (cur + nitems - 1) % nitems;
key = ERR;
break;
case KEY_DOWN:
cur = (cur + 1) % nitems;
key = ERR;
break;
case KEY_ESC:
case KEY_LEFT:
case KEY_RIGHT:
if (key == KEY_ESC)
{
key = ERR; /* return to prev submenu */
}
stop = true;
break;
default:
cur0 = cur;
do
{
cur = (cur + 1) % nitems;
}
while ((cur != cur0) && (hotkey(mp[cur].name) != toupper((int)key)));
key = (hotkey(mp[cur].name) == toupper((int)key)) ? '\n' : ERR;
}
}
rmerror();
delwin(wmenu);
touchwin(wbody);
wrefresh(wbody);
}
void startmenu(menu *mp, char *mtitle)
{
traceon();
initscr();
incurses = true;
initcolor();
wtitl = subwin(stdscr, th, bw, 0, 0);
wmain = subwin(stdscr, mh, bw, th, 0);
wbody = subwin(stdscr, bh, bw, th + mh, 0);
wstat = subwin(stdscr, sh, bw, th + mh + bh, 0);
colorbox(wtitl, TITLECOLOR, 0);
colorbox(wmain, MAINMENUCOLOR, 0);
colorbox(wbody, BODYCOLOR, 0);
colorbox(wstat, STATUSCOLOR, 0);
if (mtitle)
{
titlemsg(mtitle);
}
cbreak(); /* direct input (no newline required)... */
noecho(); /* ... without echoing */
curs_set(0); /* hide cursor (if possible) */
nodelay(wbody, true); /* don't wait for input... */
halfdelay(10); /* ...well, no more than a second, anyway */
keypad(wbody, true); /* enable cursor keys */
scrollok(wbody, true); /* enable scrolling in main window */
leaveok(stdscr, true);
leaveok(wtitl, true);
leaveok(wmain, true);
leaveok(wstat, true);
mainmenu(mp);
cleanup();
}
static void repainteditbox(WINDOW *win, int x, char *buf)
{
int maxx;
maxx = getmaxx(win);
werase(win);
mvwprintw(win, 0, 0, "%s", padstr(buf, maxx));
wmove(win, 0, x);
wrefresh(win);
}
/* weditstr() - edit string
*
* Description:
* The initial value of 'str' with a maximum length of 'field' - 1,
* which is supplied by the calling routine, is editted. The user's
* erase (^H), kill (^U) and delete word (^W) chars are interpreted.
* The PC insert or Tab keys toggle between insert and edit mode.
* Escape aborts the edit session, leaving 'str' unchanged.
* Enter, Up or Down Arrow are used to accept the changes to 'str'.
* NOTE: editstr(), mveditstr(), and mvweditstr() are macros.
*
* Return Value:
* Returns the input terminating character on success (Escape,
* Enter, Up or Down Arrow) and ERR on error.
*
* Errors:
* It is an error to call this function with a NULL window pointer.
* The length of the initial 'str' must not exceed 'field' - 1.
*
*/
int weditstr(WINDOW *win, char *buf, int field)
{
char org[MAXSTRLEN], *tp, *bp = buf;
bool defdisp = true, stop = false, insert = false;
int cury, curx, begy, begx, oldattr;
WINDOW *wedit;
int c = 0;
if ((field >= MAXSTRLEN) || (buf == NULL) || ((int)strlen(buf) > field - 1))
{
return ERR;
}
strcpy(org, buf); /* save original */
wrefresh(win);
getyx(win, cury, curx);
getbegyx(win, begy, begx);
wedit = subwin(win, 1, field, begy + cury, begx + curx);
oldattr = wedit->_attrs;
colorbox(wedit, EDITBOXCOLOR, 0);
keypad(wedit, true);
curs_set(1);
while (!stop)
{
idle();
repainteditbox(wedit, bp - buf, buf);
switch (c = wgetch(wedit))
{
case ERR:
break;
case KEY_ESC:
strcpy(buf, org); /* restore original */
stop = true;
break;
case '\n':
case KEY_UP:
case KEY_DOWN:
stop = true;
break;
case KEY_LEFT:
if (bp > buf)
bp--;
break;
case KEY_RIGHT:
defdisp = false;
if (bp - buf < (int)strlen(buf))
bp++;
break;
case '\t': /* TAB -- because insert is broken on HPUX */
case KEY_IC: /* enter insert mode */
case KEY_EIC: /* exit insert mode */
defdisp = false;
insert = !insert;
curs_set(insert ? 2 : 1);
break;
default:
if (c == erasechar()) /* backspace, ^H */
{
if (bp > buf)
{
memmove((void *)(bp - 1), (const void *)bp, strlen(bp) + 1);
bp--;
}
}
else if (c == killchar()) /* ^U */
{
bp = buf;
*bp = '\0';
}
else if (c == wordchar()) /* ^W */
{
tp = bp;
while ((bp > buf) && (*(bp - 1) == ' '))
bp--;
while ((bp > buf) && (*(bp - 1) != ' '))
bp--;
memmove((void *)bp, (const void *)tp, strlen(tp) + 1);
}
else if (isprint(c))
{
if (defdisp)
{
bp = buf;
*bp = '\0';
defdisp = false;
}
if (insert)
{
if ((int)strlen(buf) < field - 1)
{
memmove((void *)(bp + 1), (const void *)bp,
strlen(bp) + 1);
*bp++ = c;
}
}
else if (bp - buf < field - 1)
{
/* append new string terminator */
if (!*bp)
bp[1] = '\0';
*bp++ = c;
}
}
break;
}
}
curs_set(0);
wattrset(wedit, oldattr);
repainteditbox(wedit, bp - buf, buf);
delwin(wedit);
return c;
}
WINDOW *winputbox(WINDOW *win, int nlines, int ncols)
{
WINDOW *winp;
int cury, curx, begy, begx;
getyx(win, cury, curx);
getbegyx(win, begy, begx);
winp = newwin(nlines, ncols, begy + cury, begx + curx);
colorbox(winp, INPUTBOXCOLOR, 1);
return winp;
}
int getstrings(const char *desc[], char *buf[], int field)
{
WINDOW *winput;
int oldy, oldx, maxy, maxx, nlines, ncols, i, n, l, mmax = 0;
int c = 0;
bool stop = false;
for (n = 0; desc[n]; n++)
{
if ((l = strlen(desc[n])) > mmax)
{
mmax = l;
}
}
nlines = n + 2;
ncols = mmax + field + 4;
getyx(wbody, oldy, oldx);
getmaxyx(wbody, maxy, maxx);
winput = mvwinputbox(wbody, (maxy - nlines) / 2, (maxx - ncols) / 2,
nlines, ncols);
for (i = 0; i < n; i++)
{
mvwprintw(winput, i + 1, 2, "%s", desc[i]);
}
i = 0;
while (!stop)
{
switch (c = mvweditstr(winput, i + 1, mmax + 3, buf[i], field))
{
case KEY_ESC:
stop = true;
break;
case KEY_UP:
i = (i + n - 1) % n;
break;
case '\n':
case '\t':
case KEY_DOWN:
if (++i == n)
{
stop = true; /* all passed? */
}
break;
}
}
delwin(winput);
touchwin(wbody);
wmove(wbody, oldy, oldx);
wrefresh(wbody);
return c;
}
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