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insdelln.c revision 1.7 
      1 /*	$NetBSD: insdelln.c,v 1.7 2000/05/20 15:12:15 mycroft 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 #include <sys/cdefs.h>
     40 #ifndef lint
     41 __RCSID("$NetBSD: insdelln.c,v 1.7 2000/05/20 15:12:15 mycroft Exp $");
     42 #endif				/* not lint */
     43 
     44 /*
     45  * Based on deleteln.c and insertln.c -
     46  * Copyright (c) 1981, 1993, 1994
     47  *	The Regents of the University of California.  All rights reserved.
     48  */
     49 
     50 #include <string.h>
     51 
     52 #include "curses.h"
     53 #include "curses_private.h"
     54 
     55 #ifndef _CURSES_USE_MACROS
     56 
     57 /*
     58  * insdelln --
     59  *	Insert or delete lines on stdscr, leaving (cury, curx) unchanged.
     60  */
     61 int
     62 insdelln(int lines)
     63 {
     64 	return winsdelln(stdscr, lines);
     65 }
     66 
     67 #endif
     68 
     69 /*
     70  * winsdelln --
     71  *	Insert or delete lines on the window, leaving (cury, curx) unchanged.
     72  */
     73 int
     74 winsdelln(WINDOW *win, int lines)
     75 {
     76 	int     y, i;
     77 	__LINE *temp;
     78 
     79 #ifdef DEBUG
     80 	__CTRACE("winsdelln: (%0.2o) cury=%d lines=%d\n", win, win->cury,
     81 	    lines);
     82 #endif
     83 
     84 	if (!lines)
     85 		return(OK);
     86 
     87 	if (lines > 0) {
     88 		/* Insert lines */
     89 		if (lines > win->maxy - win->cury)
     90 			lines = win->maxy - win->cury;
     91 		for (y = win->maxy - lines - 1 ; y >= win->cury; --y) {
     92 			win->lines[y]->flags &= ~__ISPASTEOL;
     93 			win->lines[y + lines]->flags &= ~__ISPASTEOL;
     94 			if (win->orig == NULL) {
     95 				temp = win->lines[y + lines];
     96 				win->lines[y + lines] = win->lines[y];
     97 				win->lines[y] = temp;
     98 			} else {
     99 				(void) memcpy(win->lines[y + lines]->line,
    100 				    win->lines[y]->line,
    101 				    (size_t) win->maxx * __LDATASIZE * lines);
    102 				temp = win->lines[y];
    103 			}
    104 		}
    105 		for (y = win->cury - 1 + lines; y >= win->cury; --y)
    106 			for (i = 0; i < win->maxx; i++) {
    107 				win->lines[y]->line[i].ch = ' ';
    108 				win->lines[y]->line[i].bch = win->bch;
    109 				win->lines[y]->line[i].attr = 0;
    110 				win->lines[y]->line[i].battr = win->battr;
    111 			}
    112 		for (y = win->maxy - 1; y >= win->cury; --y)
    113 			__touchline(win, y, 0, (int) win->maxx - 1);
    114 	} else {
    115 		/* Delete lines */
    116 		lines = 0 - lines;
    117 		if (lines > win->maxy - win->cury)
    118 			lines = win->maxy - win->cury;
    119 		for (y = win->cury; y < win->maxy - lines; y++) {
    120 			win->lines[y]->flags &= ~__ISPASTEOL;
    121 			win->lines[y + lines]->flags &= ~__ISPASTEOL;
    122 			if (win->orig == NULL) {
    123 				temp = win->lines[y];
    124 				win->lines[y] = win->lines[y + lines];
    125 				win->lines[y + lines] = temp;
    126 			} else {
    127 				(void) memcpy(win->lines[y]->line,
    128 				    win->lines[y + lines]->line,
    129 				    (size_t) win->maxx * __LDATASIZE * lines);
    130 				temp = win->lines[y + lines];
    131 			}
    132 		}
    133 		for (y = win->maxy - lines; y < win->maxy; y++)
    134 			for (i = 0; i < win->maxx; i++) {
    135 				win->lines[y]->line[i].ch = ' ';
    136 				win->lines[y]->line[i].bch = win->bch;
    137 				win->lines[y]->line[i].attr = 0;
    138 				win->lines[y]->line[i].battr = win->battr;
    139 			}
    140 		for (y = win->cury; y < win->maxy; y++)
    141 			__touchline(win, y, 0, (int) win->maxx - 1);
    142 	}
    143 	if (win->orig != NULL)
    144 		__id_subwins(win->orig);
    145 	return (OK);
    146 }
    147