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mvwin.c revision 1.1 
      1 /*
      2  * Copyright (c) 1981 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)mvwin.c	5.4 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     37 
     38 # include	"curses.ext"
     39 
     40 /*
     41  * relocate the starting position of a window
     42  *
     43  */
     44 
     45 mvwin(win, by, bx)
     46 reg WINDOW	*win;
     47 reg int		by, bx; {
     48 
     49 	register WINDOW	*orig;
     50 	register int	dy, dx;
     51 
     52 	if (by + win->_maxy > LINES || bx + win->_maxx > COLS)
     53 		return ERR;
     54 	dy = by - win->_begy;
     55 	dx = bx - win->_begx;
     56 	orig = win->_orig;
     57 	if (orig == NULL) {
     58 		orig = win;
     59 		do {
     60 			win->_begy += dy;
     61 			win->_begx += dx;
     62 			_swflags_(win);
     63 			win = win->_nextp;
     64 		} while (win != orig);
     65 	}
     66 	else {
     67 		if (by < orig->_begy || win->_maxy + dy > orig->_maxy)
     68 			return ERR;
     69 		if (bx < orig->_begx || win->_maxx + dx > orig->_maxx)
     70 			return ERR;
     71 		win->_begy = by;
     72 		win->_begx = bx;
     73 		_swflags_(win);
     74 		_set_subwin_(orig, win);
     75 	}
     76 	touchwin(win);
     77 	return OK;
     78 }
     79