lib/libcurses/scroll.c

    1.1      cgd /*
    1.4      cgd  * Copyright (c) 1981, 1993
    1.4      cgd  *	The Regents of the University of California.  All rights reserved.
    1.1      cgd  *
    1.1      cgd  * Redistribution and use in source and binary forms, with or without
    1.1      cgd  * modification, are permitted provided that the following conditions
    1.1      cgd  * are met:
    1.1      cgd  * 1. Redistributions of source code must retain the above copyright
    1.1      cgd  *    notice, this list of conditions and the following disclaimer.
    1.1      cgd  * 2. Redistributions in binary form must reproduce the above copyright
    1.1      cgd  *    notice, this list of conditions and the following disclaimer in the
    1.1      cgd  *    documentation and/or other materials provided with the distribution.
    1.1      cgd  * 3. All advertising materials mentioning features or use of this software
    1.1      cgd  *    must display the following acknowledgement:
    1.1      cgd  *	This product includes software developed by the University of
    1.1      cgd  *	California, Berkeley and its contributors.
    1.1      cgd  * 4. Neither the name of the University nor the names of its contributors
    1.1      cgd  *    may be used to endorse or promote products derived from this software
    1.1      cgd  *    without specific prior written permission.
    1.1      cgd  *
    1.1      cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
    1.1      cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    1.1      cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    1.1      cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    1.1      cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    1.1      cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    1.1      cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    1.1      cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    1.1      cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    1.1      cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    1.1      cgd  * SUCH DAMAGE.
    1.1      cgd  */
    1.1      cgd
    1.1      cgd #ifndef lint
1.4.2.1      cgd static char sccsid[] = "@(#)scroll.c	8.2 (Berkeley) 1/9/94";
    1.1      cgd #endif /* not lint */
    1.1      cgd
    1.3  mycroft #include <curses.h>
    1.1      cgd
    1.1      cgd /*
    1.3  mycroft  * scroll --
    1.3  mycroft  *	Scroll the window up a line.
    1.1      cgd  */
    1.3  mycroft int
    1.1      cgd scroll(win)
    1.3  mycroft 	register WINDOW *win;
    1.1      cgd {
    1.3  mycroft 	register int oy, ox;
    1.1      cgd
    1.3  mycroft #ifdef DEBUG
    1.4      cgd 	__CTRACE("scroll: (%0.2o)\n", win);
    1.3  mycroft #endif
    1.1      cgd
    1.4      cgd 	if (!(win->flags & __SCROLLOK))
    1.3  mycroft 		return (ERR);
    1.1      cgd
    1.1      cgd 	getyx(win, oy, ox);
    1.1      cgd 	wmove(win, 0, 0);
    1.1      cgd 	wdeleteln(win);
    1.1      cgd 	wmove(win, oy, ox);
    1.1      cgd
    1.1      cgd 	if (win == curscr) {
    1.3  mycroft 		putchar('\n');
    1.4      cgd 		if (!NONL)
    1.4      cgd 			win->curx = 0;
    1.3  mycroft #ifdef DEBUG
    1.4      cgd 		__CTRACE("scroll: win == curscr\n");
    1.3  mycroft #endif
    1.1      cgd 	}
    1.3  mycroft 	return (OK);
    1.1      cgd }