libcurses/screen/quick_echo.c

/*
 * 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.
 */

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

/*LINTLIBRARY*/

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

extern  int outchcount;

/*
 *  These routines short-circuit much of the innards of curses in order to get
 *  a single character output to the screen quickly! It is used by waddch().
 */

int
_quick_echo(WINDOW *win, chtype ch)
{
    short   y = win->_cury;
    short   SPy = y + win->_begy + win->_yoffset;
    short   SPx = (win->_curx - 1) + win->_begx;
    chtype  rawc = _CHAR(ch), rawattrs = _ATTR(ch);

    if ((curscr->_flags & _CANT_BE_IMMED) ||
        (win->_flags & _WINCHANGED) ||
        (win->_clear) || (curscr->_clear) ||
        (_virtscr->_flags & _WINCHANGED) ||
        (SPy > ((LINES + SP->Yabove) - 1)) || (SPx > (COLS - 1)) ||
        (SP->slk && (SP->slk->_changed == TRUE))) {
        win->_flags |= _WINCHANGED;
        return (wrefresh(win));
    }

    outchcount = 0;
    win->_firstch[y] = _INFINITY;
    win->_lastch[y] = -1;
    /* If the cursor is not in the right place, put it there! */
    if ((SPy != curscr->_cury) || (SPx != curscr->_curx)) {
        (void) mvcur(curscr->_cury, curscr->_curx, SPy, SPx);
        curscr->_cury = SPy;
    }
    curscr->_curx = SPx + 1;
    _CURHASH[SPy] = _NOHASH;
    if (ch != ' ') {
        if (SPx > _ENDNS[SPy])
            _ENDNS[SPy] = SPx;
        if (SPx < _BEGNS[SPy])
            _BEGNS[SPy] = SPx;
    }
    _virtscr->_y[SPy][SPx] = curscr->_y[SPy][SPx] = ch;

    if (rawattrs != curscr->_attrs)
        _VIDS(rawattrs, curscr->_attrs);

    if (SP->phys_irm)
        _OFFINSERT();

    /* Write it out! */
    /* LINTED */
    (void) _outch((char) rawc);
    (void) fflush(SP->term_file);

    return (outchcount);
}