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clrtoeol.c revision 1.19 
      1 /*	$NetBSD: clrtoeol.c,v 1.19 2006/01/15 11:43:54 jdc Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1981, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)clrtoeol.c	8.2 (Berkeley) 5/4/94";
     36 #else
     37 __RCSID("$NetBSD: clrtoeol.c,v 1.19 2006/01/15 11:43:54 jdc Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #include "curses.h"
     42 #include "curses_private.h"
     43 
     44 #ifndef _CURSES_USE_MACROS
     45 
     46 /*
     47  * clrtoeol --
     48  *	Clear up to the end of line.
     49  */
     50 int
     51 clrtoeol(void)
     52 {
     53 	return wclrtoeol(stdscr);
     54 }
     55 
     56 #endif
     57 
     58 /*
     59  * wclrtoeol --
     60  *	Clear up to the end of line.
     61  */
     62 int
     63 wclrtoeol(WINDOW *win)
     64 {
     65 	int     minx, x, y;
     66 	__LDATA *end, *maxx, *sp;
     67 	attr_t	attr;
     68 
     69 	y = win->cury;
     70 	x = win->curx;
     71 	if (win->lines[y]->flags & __ISPASTEOL) {
     72 		if (y < win->maxy - 1) {
     73 			win->lines[y]->flags &= ~__ISPASTEOL;
     74 			y++;
     75 			x = 0;
     76 			win->cury = y;
     77 			win->curx = x;
     78 		} else
     79 			return (OK);
     80 	}
     81 	end = &win->lines[y]->line[win->maxx];
     82 	minx = -1;
     83 	maxx = &win->lines[y]->line[x];
     84 	if (__using_color && win != curscr)
     85 		attr = __default_color;
     86 	else
     87 		attr = 0;
     88 	for (sp = maxx; sp < end; sp++)
     89 		if (sp->ch != ' ' || sp->attr != attr) {
     90 			maxx = sp;
     91 			if (minx == -1)
     92 				minx = sp - win->lines[y]->line;
     93 			sp->ch = ' ';
     94 			sp->attr = attr;
     95 		}
     96 #ifdef DEBUG
     97 	__CTRACE("CLRTOEOL: minx = %d, maxx = %d, firstch = %d, lastch = %d\n",
     98 	    minx, (int) (maxx - win->lines[y]->line),
     99 	     *win->lines[y]->firstchp, *win->lines[y]->lastchp);
    100 #endif
    101 	/* Update firstch and lastch for the line. */
    102 	return (__touchline(win, y, x, (int) win->maxx - 1));
    103 }
    104