/*
 * 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) 1995-1998 by Sun Microsystems, Inc.
 * All rights reserved.
 */

/* LINTLIBRARY */

/*
 * wadd_wch.c
 *
 * XCurses Library
 *
 * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
 *
 */

#ifdef M_RCSID
#ifndef lint
static char rcsID[] =
"$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
"libxcurses/src/libc/xcurses/rcs/wadd_wch.c 1.5 1998/06/01 14:26:53 "
"cbates Exp $";
#endif
#endif

#include <private.h>

/* Special for calls from string add functions */
int
__m_wadd_wch(WINDOW *w, const cchar_t *cc)
{
        int     xsave = w->_curx;
        int     ysave = w->_cury;
        int     code = wadd_wch(w, cc);

        if (code == ERR) {
                w->_curx = (short) xsave;
                w->_cury = (short) ysave;
        }
        return (code);
}

/*
 * Add a character (and attributes) to a window and advance the cursor.
 * Automatic newline done at right margin, tabs are expanded every 8
 * columns, backspaces are handled.  Newline will clear the rest of the
 * line; if nl() mode then the cursor is advanced to the start of the
 * next line.
 */
int
wadd_wch(WINDOW *w, const cchar_t *cc)
{
        cchar_t uc;
        const wchar_t   *p;
        int     code, x, y;
        int     oflags;

        oflags = w->_flags & (W_FLUSH | W_SYNC_UP);

        code = ERR;
        x = w->_curx;
        y = w->_cury;

        if (x < 0 || w->_maxx <= x || y < 0 || w->_maxy <= y)
                goto error;

        if (iswprint(cc->_wc[0]) || cc->_wc[0] == L'\n' ||
                cc->_wc[0] == L'\b' || cc->_wc[0] == L'\r') {
                if (__m_cc_add(w, y, x, cc, 0, &y, &x) == ERR)
                        goto error;
        } else if (cc->_wc[0] == L'\t') {
                /*
                 * Experimental ...
                 * Maybe other cntrl chars should do this too ...
                 */
                if (__m_cc_add(w, y, x, cc, 0, &y, &x) == ERR) {
                        w->_curx = (short) x;
                        w->_cury = (short) y;
                        WSYNC(w);
                        WFLUSH(w);
                        goto error;
                }
        } else {
                /* Convert non-printables into printable representation. */
                uc._n = 1;
                uc._at = cc->_at;
                uc._co = cc->_co;

                if ((p = wunctrl((cchar_t *)cc)) == NULL)
                        goto error;

                for (; *p != '\0'; ++p) {
                        uc._wc[0] = *p;
                        if (__m_cc_add(w, y, x, &uc, 0, &y, &x) == ERR)
                                goto error;
                }
        }

        w->_curx = (short) x;
        w->_cury = (short) y;

        WSYNC(w);

        code = WFLUSH(w);
error:
        w->_flags = oflags | (w->_flags & ~(W_FLUSH | W_SYNC_UP));

        return (code);
}