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deleteln.c revision 1.5 
      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[] = "@(#)deleteln.c	8.1 (Berkeley) 6/4/93";
     36 #endif	/* not lint */
     37 
     38 #include <curses.h>
     39 #include <string.h>
     40 
     41 /*
     42  * wdeleteln --
     43  *	Delete a line from the screen.  It leaves (cury, curx) unchanged.
     44  */
     45 int
     46 wdeleteln(win)
     47 	register WINDOW *win;
     48 {
     49 	register int y, i;
     50 	register __LINE *temp;
     51 
     52 #ifdef DEBUG
     53 	__CTRACE("deleteln: (%0.2o)\n", win);
     54 #endif
     55 	temp = win->lines[win->cury];
     56 	for (y = win->cury; y < win->maxy - 1; y++) {
     57 		win->lines[y]->flags &= ~__ISPASTEOL;
     58 		win->lines[y + 1]->flags &= ~__ISPASTEOL;
     59 		if (win->orig == NULL)
     60 			win->lines[y] = win->lines[y + 1];
     61 		else
     62 			(void) memcpy(win->lines[y]->line,
     63 			    win->lines[y + 1]->line,
     64 			    win->maxx * __LDATASIZE);
     65 		__touchline(win, y, 0, win->maxx - 1, 0);
     66 	}
     67 
     68 	if (win->orig == NULL)
     69 		win->lines[y] = temp;
     70 	else
     71 		temp = win->lines[y];
     72 
     73 	for(i = 0; i < win->maxx; i++) {
     74 		temp->line[i].ch = ' ';
     75 		temp->line[i].attr = 0;
     76 	}
     77 	__touchline(win, y, 0, win->maxx - 1, 0);
     78 	if (win->orig == NULL)
     79 		__id_subwins(win);
     80 	return (OK);
     81 }
     82