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/* $OpenBSD: lib_getstr.c,v 1.4 2023/10/17 09:52:08 nicm Exp $ */
/****************************************************************************
* Copyright 2018-2021,2023 Thomas E. Dickey *
* Copyright 1998-2011,2017 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. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
****************************************************************************/
/*
** lib_getstr.c
**
** The routine wgetstr().
**
*/
#define NEED_KEY_EVENT
#include <curses.priv.h>
MODULE_ID("$Id: lib_getstr.c,v 1.4 2023/10/17 09:52:08 nicm Exp $")
/*
* This wipes out the last character, no matter whether it was a tab, control
* or other character, and handles reverse wraparound.
*/
static char *
WipeOut(WINDOW *win, int y, int x, char *first, char *last, int echoed)
{
if (last > first) {
*--last = '\0';
if (echoed) {
int y1 = win->_cury;
int x1 = win->_curx;
wmove(win, y, x);
waddstr(win, first);
getyx(win, y, x);
while (win->_cury < y1
|| (win->_cury == y1 && win->_curx < x1))
waddch(win, (chtype) ' ');
wmove(win, y, x);
}
}
return last;
}
NCURSES_EXPORT(int)
wgetnstr_events(WINDOW *win,
char *str,
int maxlen,
EVENTLIST_1st(_nc_eventlist * evl))
{
SCREEN *sp = _nc_screen_of(win);
TTY buf;
TTY_FLAGS save_flags;
char erasec;
char killc;
char *oldstr;
int ch;
int y, x;
T((T_CALLED("wgetnstr(%p,%p,%d)"), (void *) win, (void *) str, maxlen));
if (!win || !str)
returnCode(ERR);
maxlen = _nc_getstr_limit(maxlen);
NCURSES_SP_NAME(_nc_get_tty_mode) (NCURSES_SP_ARGx &buf);
save_flags = sp->_tty_flags;
NCURSES_SP_NAME(nl) (NCURSES_SP_ARG);
NCURSES_SP_NAME(noecho) (NCURSES_SP_ARG);
if (!save_flags._raw)
NCURSES_SP_NAME(cbreak) (NCURSES_SP_ARG);
erasec = NCURSES_SP_NAME(erasechar) (NCURSES_SP_ARG);
killc = NCURSES_SP_NAME(killchar) (NCURSES_SP_ARG);
oldstr = str;
getyx(win, y, x);
if (is_wintouched(win) || (win->_flags & _HASMOVED))
wrefresh(win);
while ((ch = wgetch_events(win, evl)) != ERR) {
/*
* Some terminals (the Wyse-50 is the most common) generate
* a \n from the down-arrow key. With this logic, it is the
* user's choice whether to set kcud=\n for wgetch();
* terminating *getstr() with \n should work either way.
*/
if (ch == '\n'
|| ch == '\r'
|| ch == KEY_DOWN
|| ch == KEY_ENTER) {
if (save_flags._echo == TRUE
&& win->_cury == win->_maxy
&& win->_scroll)
wechochar(win, (chtype) '\n');
break;
}
#ifdef KEY_EVENT
if (ch == KEY_EVENT)
break;
#endif
#ifdef KEY_RESIZE
if (ch == KEY_RESIZE)
break;
#endif
if (ch == erasec || ch == KEY_LEFT || ch == KEY_BACKSPACE) {
if (str > oldstr) {
str = WipeOut(win, y, x, oldstr, str, save_flags._echo);
}
} else if (ch == killc) {
while (str > oldstr) {
str = WipeOut(win, y, x, oldstr, str, save_flags._echo);
}
} else if (ch >= KEY_MIN
|| (str - oldstr >= maxlen)) {
NCURSES_SP_NAME(beep) (NCURSES_SP_ARG);
} else {
*str++ = (char) ch;
if (save_flags._echo == TRUE) {
int oldy = win->_cury;
if (waddch(win, (chtype) ch) == ERR) {
/*
* We can't really use the lower-right
* corner for input, since it'll mess
* up bookkeeping for erases.
*/
win->_flags &= ~_WRAPPED;
waddch(win, (chtype) ' ');
str = WipeOut(win, y, x, oldstr, str, save_flags._echo);
continue;
} else if (IS_WRAPPED(win)) {
/*
* If the last waddch forced a wrap &
* scroll, adjust our reference point
* for erasures.
*/
if (win->_scroll
&& oldy == win->_maxy
&& win->_cury == win->_maxy) {
if (--y <= 0) {
y = 0;
}
}
win->_flags &= ~_WRAPPED;
}
wrefresh(win);
}
}
}
win->_curx = 0;
win->_flags &= ~_WRAPPED;
if (win->_cury < win->_maxy)
win->_cury++;
wrefresh(win);
/* Restore with a single I/O call, to fix minor asymmetry between
* raw/noraw, etc.
*/
sp->_tty_flags = save_flags;
NCURSES_SP_NAME(_nc_set_tty_mode) (NCURSES_SP_ARGx &buf);
*str = '\0';
if (ch == ERR)
returnCode(ch);
T(("wgetnstr returns %s", _nc_visbuf(oldstr)));
#ifdef KEY_EVENT
if (ch == KEY_EVENT)
returnCode(ch);
#endif
#ifdef KEY_RESIZE
if (ch == KEY_RESIZE)
returnCode(ch);
#endif
returnCode(OK);
}
#ifdef NCURSES_WGETCH_EVENTS
NCURSES_EXPORT(int)
wgetnstr(WINDOW *win, char *str, int maxlen)
{
returnCode(wgetnstr_events(win,
str,
maxlen,
EVENTLIST_1st((_nc_eventlist *) 0)));
}
#endif
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