xref: /titanic_51/usr/src/lib/libcurses/screen/wgetwstr.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */


/*
 *      Copyright (c) 1997, by Sun Microsystems, Inc.
 *      All rights reserved.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*LINTLIBRARY*/

#include	<sys/types.h>
#include	"curses_inc.h"

#define		LENGTH	256

/* This routine gets a string starting at (_cury, _curx) */
int
wgetwstr(WINDOW *win, wchar_t *str)
{
	return ((wgetnwstr(win, str, LENGTH) == ERR) ? ERR : OK);
}

int
wgetnwstr(WINDOW *win, wchar_t *str, int n)
{
	int	cpos = 0, ch;
	wchar_t	*cp = str;
	int	i = 0;
	int	total = 0;
	char	myerase, mykill;
	char	rownum[LENGTH], colnum[LENGTH], length[LENGTH];
	int	doecho = SP->fl_echoit;
	int	savecb = cur_term->_fl_rawmode;
	bool	savsync, savimmed, savleave;

#ifdef	DEBUG
	if (outf)
		fprintf(outf, "doecho %d, savecb %d\n", doecho, savecb);
#endif	/* DEBUG */

	myerase = erasechar();
	mykill = killchar();
	if (!savecb)
		(void) cbreak();

	if (doecho) {
		SP->fl_echoit = FALSE;
		savsync = win->_sync;
		savimmed = win->_immed;
		savleave = win->_leave;
		win->_immed = win->_sync = win->_leave = FALSE;
		(void) wrefresh(win);
		if (n > LENGTH)
			n = LENGTH;
	}
	n--;

	while (cpos < n) {
		if (doecho) {
			rownum[cpos] = win->_cury;
			colnum[cpos] = win->_curx;
		}

		ch = wgetwch(win);
		if ((ch == ERR) || (ch == '\n') || (ch == '\r') ||
		    (ch == KEY_ENTER))
			break;
		if ((ch == myerase) || (ch == KEY_LEFT) ||
		    (ch == KEY_BACKSPACE) || (ch == mykill)) {
			if (cpos > 0) {
				if (ch == mykill) {
					i = total;
					total = cpos = 0;
					cp = str;
				} else {
					cp--;
					cpos--;
					if (doecho)
						total -= (i = length[cpos]);
				}
				if (doecho) {
					(void) wmove(win, rownum[cpos],
					    colnum[cpos]);
					/* Add the correct amount of blanks. */
					for (; i > 0; i--)
						(void) waddch(win, ' ');
					/* Move back after the blanks */
					/* are put in. */
					(void) wmove(win, rownum[cpos],
					    colnum[cpos]);
					/* Update total. */
					(void) wrefresh(win);
				}
			} else
				if (doecho)
					(void) beep();
		} else
			if ((KEY_MIN <= ch) && (ch <= KEY_MAX))
				(void) beep();
			else {
				*cp++ = ch;
				if (doecho) {
					/* Add the length of the */
					/* character to total. */
					if ((ch & EUCMASK) != P00)
						length[cpos] = wcscrw(ch);
					else if (ch >= ' ')
						length[cpos] = 1;
					else if (ch == '\t')
						length[cpos] = TABSIZE -
						    (colnum[cpos] % TABSIZE);
					else
						length[cpos] = 2;
					total += length[cpos];
					(void) wechowchar(win, (chtype) ch);
				}
				cpos++;
			}
	}

	*cp = '\0';

	if (!savecb)
		(void) nocbreak();
	/*
	 * The following code is equivalent to waddch(win, '\n')
	 * except that it does not do a wclrtoeol.
	 */
	if (doecho) {
		SP->fl_echoit = TRUE;
		win->_curx = 0;
		if (win->_cury + 1 > win->_bmarg)
			(void) wscrl(win, 1);
		else
			win->_cury++;

		win->_sync = savsync;
		win->_immed = savimmed;
		win->_leave = savleave;
		(void) wrefresh(win);
	}
	return (ch);
}