/**************************************************************************** * Copyright (c) 1998-2000,2002 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().***/#include <curses.priv.h>#include <term.h>MODULE_ID("$Id: lib_getstr.c,v 1.24 2002/09/01 17:31:12 tom 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, bool 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)){    TTY buf;    bool oldnl, oldecho, oldraw, oldcbreak;    char erasec;    char killc;    char *oldstr;    int ch;    int y, x;    T((T_CALLED("wgetnstr(%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 = erasechar();    killc = killchar();    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's 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 (oldecho == TRUE		&& win->_cury == win->_maxy		&& win->_scroll)		wechochar(win, (chtype) '\n');	    break;	}#ifdef KEY_EVENT	if (ch == KEY_EVENT)	    break;#endif	if (ch == erasec || ch == KEY_LEFT || ch == KEY_BACKSPACE) {	    if (str > oldstr) {		str = WipeOut(win, y, x, oldstr, str, oldecho);	    }	} else if (ch == killc) {	    while (str > oldstr) {		str = WipeOut(win, y, x, oldstr, str, oldecho);	    }	} else if (ch >= KEY_MIN		   || (maxlen >= 0 && str - oldstr >= maxlen)) {	    beep();	} else {	    *str++ = ch;	    if (oldecho == 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, 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;    _nc_set_tty_mode(&buf);    *str = '\0';    if (ch == ERR)	returnCode(ch);#ifdef KEY_EVENT    if (ch == KEY_EVENT)	returnCode(ch);#endif    T(("wgetnstr returns %s", _nc_visbuf(oldstr)));    returnCode(OK);}#ifdef NCURSES_WGETCH_EVENTSNCURSES_EXPORT(int)wgetnstr(WINDOW *win, char *str, int maxlen){    returnCode(wgetnstr_events(win,			       str,			       maxlen,			       EVENTLIST_1st((_nc_eventlist *) 0)));}#endif