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insdelln.c revision 1.2 
      1 /*	$NetBSD: insdelln.c,v 1.2 2000/04/11 13:57:09 blymn Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Julian Coleman.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Based on deleteln.c and insertln.c -
     41  * Copyright (c) 1981, 1993, 1994
     42  *	The Regents of the University of California.  All rights reserved.
     43  */
     44 
     45 #include <string.h>
     46 
     47 #include "curses.h"
     48 #include "curses_private.h"
     49 
     50 /*
     51  * winsdelln --
     52  *	Insert or delete lines on the window, leaving (cury, curx) unchanged.
     53  */
     54 int
     55 winsdelln(win, lines)
     56 	WINDOW *win;
     57 	int	lines;
     58 {
     59 	int     y, i;
     60 	__LINE *temp;
     61 
     62 #ifdef DEBUG
     63 	__CTRACE("winsdelln: (%0.2o) cury=%d lines=%d\n", win, win->cury,
     64 	    lines);
     65 #endif
     66 
     67 	if (!lines)
     68 		return(OK);
     69 
     70 	if (lines > 0) {
     71 		/* Insert lines */
     72 		if (lines > win->maxy - win->cury)
     73 			lines = win->maxy - win->cury;
     74 		for (y = win->maxy - lines - 1 ; y >= win->cury; --y) {
     75 			win->lines[y]->flags &= ~__ISPASTEOL;
     76 			win->lines[y + lines]->flags &= ~__ISPASTEOL;
     77 			if (win->orig == NULL) {
     78 				temp = win->lines[y + lines];
     79 				win->lines[y + lines] = win->lines[y];
     80 				win->lines[y] = temp;
     81 			} else {
     82 				(void) memcpy(win->lines[y + lines]->line,
     83 				    win->lines[y]->line,
     84 				    (size_t) win->maxx * __LDATASIZE * lines);
     85 				temp = win->lines[y];
     86 			}
     87 		}
     88 		for (y = win->cury - 1 + lines; y >= win->cury; --y)
     89 			for (i = 0; i < win->maxx; i++) {
     90 				win->lines[y]->line[i].ch = ' ';
     91 				win->lines[y]->line[i].attr = 0;
     92 			}
     93 		for (y = win->maxy - 1; y >= win->cury; --y)
     94 			__touchline(win, y, 0, (int) win->maxx - 1, 0);
     95 	} else {
     96 		/* Delete lines */
     97 		lines = 0 - lines;
     98 		if (lines > win->maxy - win->cury)
     99 			lines = win->maxy - win->cury;
    100 		for (y = win->cury; y < win->maxy - lines; y++) {
    101 			win->lines[y]->flags &= ~__ISPASTEOL;
    102 			win->lines[y + lines]->flags &= ~__ISPASTEOL;
    103 			if (win->orig == NULL) {
    104 				temp = win->lines[y];
    105 				win->lines[y] = win->lines[y + lines];
    106 				win->lines[y + lines] = temp;
    107 			} else {
    108 				(void) memcpy(win->lines[y]->line,
    109 				    win->lines[y + lines]->line,
    110 				    (size_t) win->maxx * __LDATASIZE * lines);
    111 				temp = win->lines[y + lines];
    112 			}
    113 		}
    114 		for (y = win->maxy - lines; y < win->maxy; y++)
    115 			for (i = 0; i < win->maxx; i++) {
    116 				win->lines[y]->line[i].ch = ' ';
    117 				win->lines[y]->line[i].attr = 0;
    118 			}
    119 		for (y = win->cury; y < win->maxy; y++)
    120 			__touchline(win, y, 0, (int) win->maxx - 1, 0);
    121 	}
    122 	if (win->orig != NULL)
    123 		__id_subwins(win);
    124 	return (OK);
    125 }
    126