lib/libcurses/insdelln.c

   1 /*      $NetBSD: insdelln.c,v 1.16 2009/07/22 16:57:15 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 1.16 2009/07/22 16:57:15 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         return (OK);
 181 }