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/* $OpenBSD: lib_get_wstr.c,v 1.1 2010/09/06 17:26:17 nicm Exp $ */
/****************************************************************************
* Copyright (c) 2002-2004,2008 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: Thomas E. Dickey *
****************************************************************************/
/*
** lib_get_wstr.c
**
** The routine wgetn_wstr().
**
*/
#include <curses.priv.h>
#include <term.h>
MODULE_ID("$Id: lib_get_wstr.c,v 1.1 2010/09/06 17:26:17 nicm Exp $")
static int
wadd_wint(WINDOW *win, wint_t *src)
{
cchar_t tmp;
wchar_t wch[2];
wch[0] = (wchar_t) (*src);
wch[1] = 0;
setcchar(&tmp, wch, A_NORMAL, 0, NULL);
return wadd_wch(win, &tmp);
}
/*
* This wipes out the last character, no matter whether it was a tab, control
* or other character, and handles reverse wraparound.
*/
static wint_t *
WipeOut(WINDOW *win, int y, int x, wint_t *first, wint_t *last, bool echoed)
{
if (last > first) {
*--last = '\0';
if (echoed) {
int y1 = win->_cury;
int x1 = win->_curx;
int n;
wmove(win, y, x);
for (n = 0; first[n] != 0; ++n) {
wadd_wint(win, first + n);
}
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)
wgetn_wstr(WINDOW *win, wint_t *str, int maxlen)
{
SCREEN *sp = _nc_screen_of(win);
TTY buf;
bool oldnl, oldecho, oldraw, oldcbreak;
wint_t erasec;
wint_t killc;
wint_t *oldstr = str;
wint_t *tmpstr = str;
wint_t ch;
int y, x, code;
T((T_CALLED("wgetn_wstr(%p,%p, %d)"), win, str, maxlen));
if (!win)
returnCode(ERR);
_nc_get_tty_mode(&buf);
oldnl = sp->_nl;
oldecho = sp->_echo;
oldraw = sp->_raw;
oldcbreak = sp->_cbreak;
nl();
noecho();
noraw();
cbreak();
erasec = (wint_t) erasechar();
killc = (wint_t) killchar();
getyx(win, y, x);
if (is_wintouched(win) || (win->_flags & _HASMOVED))
wrefresh(win);
while ((code = wget_wch(win, &ch)) != ERR) {
/*
* Map special characters into key-codes.
*/
if (ch == '\r')
ch = '\n';
if (ch == '\n') {
code = KEY_CODE_YES;
ch = KEY_ENTER;
}
if (ch < KEY_MIN) {
if (ch == erasec) {
ch = KEY_BACKSPACE;
code = KEY_CODE_YES;
}
if (ch == killc) {
ch = KEY_EOL;
code = KEY_CODE_YES;
}
}
if (code == KEY_CODE_YES) {
/*
* Some terminals (the Wyse-50 is the most common) generate a \n
* from the down-arrow key. With this logic, it's the user's
* choice whether to set kcud=\n for wget_wch(); terminating
* *getn_wstr() with \n should work either way.
*/
if (ch == KEY_DOWN || ch == KEY_ENTER) {
if (oldecho == TRUE
&& win->_cury == win->_maxy
&& win->_scroll)
wechochar(win, (chtype) '\n');
break;
}
if (ch == KEY_LEFT || ch == KEY_BACKSPACE) {
if (tmpstr > oldstr) {
tmpstr = WipeOut(win, y, x, oldstr, tmpstr, oldecho);
}
} else if (ch == KEY_EOL) {
while (tmpstr > oldstr) {
tmpstr = WipeOut(win, y, x, oldstr, tmpstr, oldecho);
}
} else {
beep();
}
} else if (maxlen >= 0 && tmpstr - oldstr >= maxlen) {
beep();
} else {
*tmpstr++ = ch;
*tmpstr = 0;
if (oldecho == TRUE) {
int oldy = win->_cury;
if (wadd_wint(win, tmpstr - 1) == 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) ' ');
tmpstr = WipeOut(win, y, x, oldstr, tmpstr, oldecho);
continue;
} else if (win->_flags & _WRAPPED) {
/*
* 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->_nl = oldnl;
sp->_echo = oldecho;
sp->_raw = oldraw;
sp->_cbreak = oldcbreak;
(void) _nc_set_tty_mode(&buf);
*tmpstr = 0;
if (code == ERR) {
if (tmpstr == oldstr) {
*tmpstr++ = WEOF;
*tmpstr = 0;
}
returnCode(ERR);
}
T(("wgetn_wstr returns %s", _nc_viswibuf(oldstr)));
returnCode(OK);
}
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