Home | History | Annotate | Line # | Download | only in libcurses
touchwin.c revision 1.2 
      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[] = "from: @(#)touchwin.c	5.4 (Berkeley) 6/1/90";*/
     36 static char rcsid[] = "$Id: touchwin.c,v 1.2 1993/08/01 18:35:21 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 # include	"curses.ext"
     40 
     41 /*
     42  * make it look like the whole window has been changed.
     43  *
     44  */
     45 touchwin(win)
     46 register WINDOW	*win;
     47 {
     48 	register int	y, maxy;
     49 
     50 # ifdef	DEBUG
     51 	fprintf(outf, "TOUCHWIN(%0.2o)\n", win);
     52 # endif
     53 	maxy = win->_maxy;
     54 	for (y = 0; y < maxy; y++)
     55 		touchline(win, y, 0, win->_maxx - 1);
     56 }
     57 
     58 /*
     59  * touch a given line
     60  */
     61 touchline(win, y, sx, ex)
     62 register WINDOW	*win;
     63 register int	y, sx, ex;
     64 {
     65 # ifdef DEBUG
     66 	fprintf(outf, "TOUCHLINE(%0.2o, %d, %d, %d)\n", win, y, sx, ex);
     67 	fprintf(outf, "TOUCHLINE:first = %d, last = %d\n", win->_firstch[y], win->_lastch[y]);
     68 # endif
     69 	sx += win->_ch_off;
     70 	ex += win->_ch_off;
     71 	if (win->_firstch[y] == _NOCHANGE) {
     72 		win->_firstch[y] = sx;
     73 		win->_lastch[y] = ex;
     74 	}
     75 	else {
     76 		if (win->_firstch[y] > sx)
     77 			win->_firstch[y] = sx;
     78 		if (win->_lastch[y] < ex)
     79 			win->_lastch[y] = ex;
     80 	}
     81 # ifdef	DEBUG
     82 	fprintf(outf, "TOUCHLINE:first = %d, last = %d\n", win->_firstch[y], win->_lastch[y]);
     83 # endif
     84 }
     85