1 /****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 ****************************************************************************/
38 ** The routine wgetstr().
42 #include <curses.priv.h>
45 MODULE_ID("$Id: lib_getstr.c,v 1.20 1998/12/20 00:16:01 tom Exp $")
48 * This wipes out the last character, no matter whether it was a tab, control
49 * or other character, and handles reverse wraparound.
51 static char *WipeOut(WINDOW *win, int y, int x, char *first, char *last, bool echoed)
62 while (win->_cury < y1
63 || (win->_cury == y1 && win->_curx < x1))
72 int wgetnstr(WINDOW *win, char *str, int maxlen)
75 bool oldnl, oldecho, oldraw, oldcbreak;
82 T((T_CALLED("wgetnstr(%p,%p, %d)"), win, str, maxlen));
87 _nc_get_tty_mode(&buf);
92 oldcbreak = SP->_cbreak;
104 if (is_wintouched(win) || (win->_flags & _HASMOVED))
107 while ((ch = wgetch(win)) != ERR) {
109 * Some terminals (the Wyse-50 is the most common) generate
110 * a \n from the down-arrow key. With this logic, it's the
111 * user's choice whether to set kcud=\n for wgetch();
112 * terminating *getstr() with \n should work either way.
117 || ch == KEY_ENTER) {
119 && win->_cury == win->_maxy
121 wechochar(win, '\n');
124 if (ch == erasec || ch == KEY_LEFT || ch == KEY_BACKSPACE) {
126 str = WipeOut(win, y, x, oldstr, str, oldecho);
128 } else if (ch == killc) {
129 while (str > oldstr) {
130 str = WipeOut(win, y, x, oldstr, str, oldecho);
132 } else if (ch >= KEY_MIN
133 || (maxlen >= 0 && str - oldstr >= maxlen)) {
137 if (oldecho == TRUE) {
138 int oldy = win->_cury;
139 if (waddch(win, ch) == ERR) {
141 * We can't really use the lower-right
142 * corner for input, since it'll mess
143 * up bookkeeping for erases.
145 win->_flags &= ~_WRAPPED;
147 str = WipeOut(win, y, x, oldstr, str, oldecho);
149 } else if (win->_flags & _WRAPPED) {
151 * If the last waddch forced a wrap &
152 * scroll, adjust our reference point
156 && oldy == win->_maxy
157 && win->_cury == win->_maxy) {
162 win->_flags &= ~_WRAPPED;
170 win->_flags &= ~_WRAPPED;
171 if (win->_cury < win->_maxy)
175 /* Restore with a single I/O call, to fix minor asymmetry between
181 SP->_cbreak = oldcbreak;
183 _nc_set_tty_mode(&buf);
189 T(("wgetnstr returns %s", _nc_visbuf(oldstr)));