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