insdelln.c revision 1.21
1 /* $NetBSD: insdelln.c,v 1.21 2022/04/12 07:03:04 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 * 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 1.21 2022/04/12 07:03:04 blymn 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 59 return winsdelln(stdscr, nlines); 60 } 61 62 #endif 63 64 /* 65 * winsdelln -- 66 * Insert or delete lines on the window, leaving (cury, curx) unchanged. 67 */ 68 int 69 winsdelln(WINDOW *win, int nlines) 70 { 71 int y, i, last; 72 __LINE *temp; 73 #ifdef HAVE_WCHAR 74 __LDATA *lp; 75 #endif /* HAVE_WCHAR */ 76 attr_t attr; 77 78 __CTRACE(__CTRACE_LINE, 79 "winsdelln: (%p) cury=%d lines=%d\n", win, win->cury, nlines); 80 81 if (!nlines) 82 return OK; 83 84 if (__using_color && win != curscr) 85 attr = win->battr & __COLOR; 86 else 87 attr = 0; 88 89 if (nlines > 0) { 90 /* Insert lines */ 91 if (win->cury < win->scr_t || win->cury > win->scr_b) { 92 /* Outside scrolling region */ 93 if (nlines > win->maxy - win->cury) 94 nlines = win->maxy - win->cury; 95 last = win->maxy - 1; 96 } else { 97 /* Inside scrolling region */ 98 if (nlines > win->scr_b + 1 - win->cury) 99 nlines = win->scr_b + 1 - win->cury; 100 last = win->scr_b; 101 } 102 for (y = last - nlines; y >= win->cury; --y) { 103 win->alines[y]->flags &= ~__ISPASTEOL; 104 win->alines[y + nlines]->flags &= ~__ISPASTEOL; 105 if (win->orig == NULL) { 106 temp = win->alines[y + nlines]; 107 win->alines[y + nlines] = win->alines[y]; 108 win->alines[y] = temp; 109 } else { 110 (void)memcpy(win->alines[y + nlines]->line, 111 win->alines[y]->line, 112 (size_t)win->maxx * __LDATASIZE); 113 } 114 } 115 for (y = win->cury - 1 + nlines; y >= win->cury; --y) 116 for (i = 0; i < win->maxx; i++) { 117 win->alines[y]->line[i].ch = win->bch; 118 win->alines[y]->line[i].attr = attr; 119 win->alines[y]->line[i].ch = win->bch; 120 #ifdef HAVE_WCHAR 121 lp = &win->alines[y]->line[i]; 122 if (_cursesi_copy_nsp(win->bnsp, lp) == ERR) 123 return ERR; 124 lp->wcols = 1; 125 #endif /* HAVE_WCHAR */ 126 } 127 for (y = last; y >= win->cury; --y) 128 __touchline(win, y, 0, (int)win->maxx - 1); 129 } else { 130 /* Delete nlines */ 131 nlines = 0 - nlines; 132 if (win->cury < win->scr_t || win->cury > win->scr_b) { 133 /* Outside scrolling region */ 134 if (nlines > win->maxy - win->cury) 135 nlines = win->maxy - win->cury; 136 last = win->maxy; 137 } else { 138 /* Inside scrolling region */ 139 if (nlines > win->scr_b + 1 - win->cury) 140 nlines = win->scr_b + 1 - win->cury; 141 last = win->scr_b + 1; 142 } 143 for (y = win->cury; y < last - nlines; y++) { 144 win->alines[y]->flags &= ~__ISPASTEOL; 145 win->alines[y + nlines]->flags &= ~__ISPASTEOL; 146 if (win->orig == NULL) { 147 temp = win->alines[y]; 148 win->alines[y] = win->alines[y + nlines]; 149 win->alines[y + nlines] = temp; 150 } else { 151 (void)memcpy(win->alines[y]->line, 152 win->alines[y + nlines]->line, 153 (size_t)win->maxx * __LDATASIZE); 154 } 155 } 156 for (y = last - nlines; y < last; y++) 157 for (i = 0; i < win->maxx; i++) { 158 win->alines[y]->line[i].ch = win->bch; 159 win->alines[y]->line[i].attr = attr; 160 win->alines[y]->line[i].ch = win->bch; 161 #ifndef HAVE_WCHAR 162 lp = &win->alines[y]->line[i]; 163 lp->wcols = 1; 164 if (_cursesi_copy_nsp(win->bnsp, lp) == ERR) 165 return ERR; 166 #endif /* HAVE_WCHAR */ 167 } 168 for (y = win->cury; y < last; y++) 169 __touchline(win, y, 0, (int)win->maxx - 1); 170 } 171 if (win->orig != NULL) 172 __id_subwins(win->orig); 173 __sync(win); 174 return OK; 175 } 176
Indexes created Tue Sep 23 14:10:03 GMT 2025