/*
 * 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 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*LINTLIBRARY*/

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

/* Insert a character at (curx, cury). */

int
winsch(WINDOW *win, chtype c)
{
        short   curx = win->_curx;
        int     n, cury = win->_cury;
        chtype  *wcp, a;
        int             rv;

        a = _ATTR(c);
        c &= A_CHARTEXT;

        rv = OK;
        win->_insmode = TRUE;
        if (_scrmax > 1 && (rv = _mbvalid(win)) == ERR)
                goto done;
        /* take care of multi-byte characters */
        if (_mbtrue && ISMBIT(c)) {
                rv = _mbaddch(win, A_NORMAL, RBYTE(c));
                goto done;
        }
        win->_nbyte = -1;
        curx = win->_curx;

        /* let waddch() worry about these */
        if (c == '\r' || c == '\b')
                return (waddch(win, c));

        /* with \n, in contrast to waddch, we don't clear-to-eol */
        if (c == '\n') {
                if (cury >= (win->_maxy-1) || cury == win->_bmarg)
                        return (wscrl(win, 1));
                else {
                        win->_cury++;
                        win->_curx = 0;
                        return (OK);
                }
        }

        /* with tabs or control characters, we have to do more */
        if (c == '\t') {
                n = (TABSIZE - (curx % TABSIZE));
                if ((curx + n) >= win->_maxx)
                        n = win->_maxx - curx;
                c = ' ';
        } else {
                if (iscntrl((int) c) != 0) {
                        if (curx >= win->_maxx-1)
                                return (ERR);
                        n = 2;
                } else
                        n = 1;
        }

        /* shift right */
        wcp = win->_y[cury] + curx;
        if ((rv = _mbinsshift(win, n)) == ERR)
                goto done;

        /* insert new control character */
        if (c < ' ' || c == _CTRL('?')) {
                *wcp++ = '^' | win->_attrs | a;
                *wcp = _UNCTRL(c) | win->_attrs | a;
        } else {
                /* normal characters */
                c = _WCHAR(win, c) | a;
                for (; n > 0; --n)
                        *wcp++ = c;
        }

done:
        if (curx < win->_firstch[cury])
                win->_firstch[cury] = curx;
        win->_lastch[cury] = win->_maxx-1;

        win->_flags |= _WINCHANGED;

        if (win->_sync)
                wsyncup(win);

        return ((rv == OK && win->_immed) ? wrefresh(win) : rv);
}