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insdelln.c revision 1.17
      1 /*	$NetBSD: insdelln.c,v 1.17 2017/01/02 10:28:34 roy 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __RCSID("$NetBSD: insdelln.c,v 1.17 2017/01/02 10:28:34 roy Exp $");
     35 #endif				/* not lint */
     36 
     37 /*
     38  * Based on deleteln.c and insertln.c -
     39  * Copyright (c) 1981, 1993, 1994
     40  *	The Regents of the University of California.  All rights reserved.
     41  */
     42 
     43 #include <string.h>
     44 #include <stdlib.h>
     45 
     46 #include "curses.h"
     47 #include "curses_private.h"
     48 
     49 #ifndef _CURSES_USE_MACROS
     50 
     51 /*
     52  * insdelln --
     53  *	Insert or delete lines on stdscr, leaving (cury, curx) unchanged.
     54  */
     55 int
     56 insdelln(int nlines)
     57 {
     58 	return winsdelln(stdscr, nlines);
     59 }
     60 
     61 #endif
     62 
     63 /*
     64  * winsdelln --
     65  *	Insert or delete lines on the window, leaving (cury, curx) unchanged.
     66  */
     67 int
     68 winsdelln(WINDOW *win, int nlines)
     69 {
     70 	int     y, i, last;
     71 	__LINE *temp;
     72 #ifdef HAVE_WCHAR
     73 	__LDATA *lp;
     74 #endif /* HAVE_WCHAR */
     75 	attr_t	attr;
     76 
     77 #ifdef DEBUG
     78 	__CTRACE(__CTRACE_LINE,
     79 	    "winsdelln: (%p) cury=%d lines=%d\n", win, win->cury, nlines);
     80 #endif
     81 
     82 	if (!nlines)
     83 		return(OK);
     84 
     85 	if (__using_color && win != curscr)
     86 		attr = win->battr & __COLOR;
     87 	else
     88 		attr = 0;
     89 
     90 	if (nlines > 0) {
     91 		/* Insert lines */
     92 		if (win->cury < win->scr_t || win->cury > win->scr_b) {
     93 			/*  Outside scrolling region */
     94 			if (nlines > win->maxy - win->cury)
     95 				nlines = win->maxy - win->cury;
     96 			last = win->maxy - 1;
     97 		} else {
     98 			/* Inside scrolling region */
     99 			if (nlines > win->scr_b + 1 - win->cury)
    100 				nlines = win->scr_b + 1 - win->cury;
    101 			last = win->scr_b;
    102 		}
    103 		for (y = last - nlines; y >= win->cury; --y) {
    104 			win->alines[y]->flags &= ~__ISPASTEOL;
    105 			win->alines[y + nlines]->flags &= ~__ISPASTEOL;
    106 			if (win->orig == NULL) {
    107 				temp = win->alines[y + nlines];
    108 				win->alines[y + nlines] = win->alines[y];
    109 				win->alines[y] = temp;
    110 			} else {
    111 				(void) memcpy(win->alines[y + nlines]->line,
    112 				    win->alines[y]->line,
    113 				    (size_t) win->maxx * __LDATASIZE);
    114 			}
    115 		}
    116 		for (y = win->cury - 1 + nlines; y >= win->cury; --y)
    117 			for (i = 0; i < win->maxx; i++) {
    118 				win->alines[y]->line[i].ch = win->bch;
    119 				win->alines[y]->line[i].attr = attr;
    120 #ifndef HAVE_WCHAR
    121 				win->alines[y]->line[i].ch = win->bch;
    122 #else
    123 				win->alines[y]->line[i].ch
    124 					= ( wchar_t )btowc(( int ) win->bch );
    125 				lp = &win->alines[y]->line[i];
    126 				if (_cursesi_copy_nsp(win->bnsp, lp) == ERR)
    127 					return ERR;
    128 				SET_WCOL( *lp, 1 );
    129 #endif /* HAVE_WCHAR */
    130 			}
    131 		for (y = last; y >= win->cury; --y)
    132 			__touchline(win, y, 0, (int) win->maxx - 1);
    133 	} else {
    134 		/* Delete nlines */
    135 		nlines = 0 - nlines;
    136 		if (win->cury < win->scr_t || win->cury > win->scr_b) {
    137 			/*  Outside scrolling region */
    138 			if (nlines > win->maxy - win->cury)
    139 				nlines = win->maxy - win->cury;
    140 			last = win->maxy;
    141 		} else {
    142 			/* Inside scrolling region */
    143 			if (nlines > win->scr_b + 1 - win->cury)
    144 				nlines = win->scr_b + 1 - win->cury;
    145 			last = win->scr_b + 1;
    146 		}
    147 		for (y = win->cury; y < last - nlines; y++) {
    148 			win->alines[y]->flags &= ~__ISPASTEOL;
    149 			win->alines[y + nlines]->flags &= ~__ISPASTEOL;
    150 			if (win->orig == NULL) {
    151 				temp = win->alines[y];
    152 				win->alines[y] = win->alines[y + nlines];
    153 				win->alines[y + nlines] = temp;
    154 			} else {
    155 				(void) memcpy(win->alines[y]->line,
    156 				    win->alines[y + nlines]->line,
    157 				    (size_t) win->maxx * __LDATASIZE);
    158 			}
    159 		}
    160 		for (y = last - nlines; y < last; y++)
    161 			for (i = 0; i < win->maxx; i++) {
    162 				win->alines[y]->line[i].ch = win->bch;
    163 				win->alines[y]->line[i].attr = attr;
    164 #ifndef HAVE_WCHAR
    165 				win->alines[y]->line[i].ch = win->bch;
    166 #else
    167 				win->alines[y]->line[i].ch
    168 					= (wchar_t)btowc((int) win->bch);
    169 				lp = &win->alines[y]->line[i];
    170 				SET_WCOL( *lp, 1 );
    171 				if (_cursesi_copy_nsp(win->bnsp, lp) == ERR)
    172 					return ERR;
    173 #endif /* HAVE_WCHAR */
    174 			}
    175 		for (y = win->cury; y < last; y++)
    176 			__touchline(win, y, 0, (int) win->maxx - 1);
    177 	}
    178 	if (win->orig != NULL)
    179 		__id_subwins(win->orig);
    180 	__sync(win);
    181 	return (OK);
    182 }
    183