/* $OpenBSD: lib_ins_wch.c,v 1.2 2023/10/17 09:52:09 nicm Exp $ */

/****************************************************************************
 * Copyright 2019,2020 Thomas E. Dickey                                     *
 * Copyright 2002-2016,2017 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: Thomas Dickey 2002                                              *
 ****************************************************************************/

/*
**      lib_ins_wch.c
**
**      The routine wins_wch().
**
*/

#include <curses.priv.h>

MODULE_ID("$Id: lib_ins_wch.c,v 1.2 2023/10/17 09:52:09 nicm Exp $")

/*
 * Insert the given character, updating the current location to simplify
 * inserting a string.
 */
NCURSES_EXPORT(int)
_nc_insert_wch(WINDOW *win, const cchar_t *wch)
{
    int cells = _nc_wacs_width(CharOf(CHDEREF(wch)));
    int code = OK;

    if (cells < 0) {
        code = winsch(win, (chtype) CharOf(CHDEREF(wch)));
    } else {
        if (cells == 0)
            cells = 1;

        if (win->_curx <= win->_maxx) {
            int cell;
            struct ldat *line = &(win->_line[win->_cury]);
            NCURSES_CH_T *end = &(line->text[win->_curx]);
            NCURSES_CH_T *temp1 = &(line->text[win->_maxx]);
            NCURSES_CH_T *temp2 = temp1 - cells;

            CHANGED_TO_EOL(line, win->_curx, win->_maxx);
            while (temp1 > end)
                *temp1-- = *temp2--;

            *temp1 = _nc_render(win, *wch);
            for (cell = 1; cell < cells; ++cell) {
                SetWidecExt(temp1[cell], cell);
            }

            win->_curx = (NCURSES_SIZE_T) (win->_curx + cells);
        }
    }
    return code;
}

NCURSES_EXPORT(int)
wins_wch(WINDOW *win, const cchar_t *wch)
{
    int code = ERR;

    T((T_CALLED("wins_wch(%p, %s)"), (void *) win, _tracecchar_t(wch)));

    if (win != 0) {
        NCURSES_SIZE_T oy = win->_cury;
        NCURSES_SIZE_T ox = win->_curx;

        code = _nc_insert_wch(win, wch);

        win->_curx = ox;
        win->_cury = oy;
        _nc_synchook(win);
    }
    returnCode(code);
}

NCURSES_EXPORT(int)
wins_nwstr(WINDOW *win, const wchar_t *wstr, int n)
{
    int code = ERR;

    T((T_CALLED("wins_nwstr(%p,%s,%d)"),
       (void *) win, _nc_viswbufn(wstr, n), n));

    if (win != 0
        && wstr != 0) {
        if (n < 1)
            n = INT_MAX;
        code = OK;

        if (n > 0) {
            const wchar_t *cp;
            SCREEN *sp = _nc_screen_of(win);
            NCURSES_SIZE_T oy = win->_cury;
            NCURSES_SIZE_T ox = win->_curx;

            for (cp = wstr; (*cp != L'\0') && ((cp - wstr) < n); cp++) {
                int len = _nc_wacs_width(*cp);

                if ((len >= 0 && len != 1) || !is7bits(*cp)) {
                    cchar_t tmp_cchar;
                    wchar_t tmp_wchar = *cp;
                    memset(&tmp_cchar, 0, sizeof(tmp_cchar));
                    (void) setcchar(&tmp_cchar,
                                    &tmp_wchar,
                                    WA_NORMAL,
                                    (short) 0,
                                    (void *) 0);
                    code = _nc_insert_wch(win, &tmp_cchar);
                } else {
                    /* tabs, other ASCII stuff */
                    code = _nc_insert_ch(sp, win, (chtype) (*cp));
                }
                if (code != OK)
                    break;
            }

            win->_curx = ox;
            win->_cury = oy;
            _nc_synchook(win);
        }
    }
    returnCode(code);
}