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touchwin.c revision 1.4 
      1 /*
      2  * Copyright (c) 1981, 1993
      3  *	The Regents of the University of California.  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	8.1 (Berkeley) 6/4/93";
     36 #endif /* not lint */
     37 
     38 #include <curses.h>
     39 
     40 
     41 /*
     42  * touchline --
     43  *	Touch a given line.
     44  */
     45 int
     46 touchline(win, y, sx, ex)
     47 	WINDOW *win;
     48 	register int y, sx, ex;
     49 {
     50 	return (__touchline(win, y, sx, ex, 1));
     51 }
     52 
     53 
     54 /*
     55  * touchwin --
     56  *	Make it look like the whole window has been changed.
     57  */
     58 int
     59 touchwin(win)
     60 	register WINDOW *win;
     61 {
     62 	register int y, maxy;
     63 
     64 #ifdef DEBUG
     65 	__CTRACE("touchwin: (%0.2o)\n", win);
     66 #endif
     67 	maxy = win->maxy;
     68 	for (y = 0; y < maxy; y++)
     69 		__touchline(win, y, 0, win->maxx - 1, 1);
     70 	return (OK);
     71 }
     72 
     73 
     74 int
     75 __touchwin(win)
     76 	register WINDOW *win;
     77 {
     78 	register int y, maxy;
     79 
     80 #ifdef DEBUG
     81 	__CTRACE("touchwin: (%0.2o)\n", win);
     82 #endif
     83 	maxy = win->maxy;
     84 	for (y = 0; y < maxy; y++)
     85 		__touchline(win, y, 0, win->maxx - 1, 0);
     86 	return (OK);
     87 }
     88 
     89 int
     90 __touchline(win, y, sx, ex, force)
     91 	register WINDOW *win;
     92 	register int y, sx, ex;
     93 	int force;
     94 {
     95 #ifdef DEBUG
     96 	__CTRACE("touchline: (%0.2o, %d, %d, %d, %d)\n", win, y, sx, ex, force);
     97 	__CTRACE("touchline: first = %d, last = %d\n",
     98 	    *win->lines[y]->firstchp, *win->lines[y]->lastchp);
     99 #endif
    100 	if (force)
    101 		win->lines[y]->flags |= __FORCEPAINT;
    102 	sx += win->ch_off;
    103 	ex += win->ch_off;
    104 	if (!(win->lines[y]->flags & __ISDIRTY)) {
    105 		win->lines[y]->flags |= __ISDIRTY;
    106 		*win->lines[y]->firstchp = sx;
    107 		*win->lines[y]->lastchp = ex;
    108 	} else {
    109 		if (*win->lines[y]->firstchp > sx)
    110 			*win->lines[y]->firstchp = sx;
    111 		if (*win->lines[y]->lastchp < ex)
    112 			*win->lines[y]->lastchp = ex;
    113 	}
    114 #ifdef DEBUG
    115 	__CTRACE("touchline: first = %d, last = %d\n",
    116 	    *win->lines[y]->firstchp, *win->lines[y]->lastchp);
    117 #endif
    118 	return (OK);
    119 }
    120 
    121 
    122