usr.bin/window/wwframe.c

   1 /*      @(#)wwframe.c   8.1 (Berkeley) 6/6/93   */
   2 /*      $NetBSD: wwframe.c,v 1.7 2003/08/07 11:17:39 agc Exp $  */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Edward Wang at The University of California, Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "ww.h"
  37 #include "tt.h"
  38
  39 #define frameok(w, r, c) (w1 = wwindex[wwsmap[r][c]], \
  40         w1->ww_fmap || w1->ww_order > (w)->ww_order)
  41
  42 void
  43 wwframe(struct ww *w, struct ww *wframe)
  44 {
  45         int r, c;
  46         char a1, a2, a3;
  47         char b1, b2, b3;
  48         int code;
  49         struct ww *w1;
  50
  51         if (w->ww_w.t > 0) {
  52                 r = w->ww_w.t - 1;
  53                 c = w->ww_i.l - 1;
  54                 a1 = 0;
  55                 a2 = 0;
  56                 b1 = 0;
  57                 b2 = c < 0 || frameok(w, r, c);
  58
  59                 for (; c < w->ww_i.r; c++) {
  60                         if (c + 1 >= wwncol) {
  61                                 a3 = 1;
  62                                 b3 = 1;
  63                         } else {
  64                                 a3 = w->ww_index == wwsmap[r + 1][c + 1];
  65                                 b3 = frameok(w, r, c + 1);
  66                         }
  67                         if (b2) {
  68                                 code = 0;
  69                                 if ((a1 || a2) && b1)
  70                                         code |= WWF_L;
  71                                 if ((a2 || a3) && b3)
  72                                         code |= WWF_R;
  73                                 if (code)
  74                                         wwframec(wframe, r, c, code|WWF_TOP);
  75                         }
  76                         a1 = a2;
  77                         a2 = a3;
  78                         b1 = b2;
  79                         b2 = b3;
  80                 }
  81                 if ((a1 || a2) && b1 && b2)
  82                         wwframec(wframe, r, c, WWF_L|WWF_TOP);
  83         }
  84
  85         if (w->ww_w.b < wwnrow) {
  86                 r = w->ww_w.b;
  87                 c = w->ww_i.l - 1;
  88                 a1 = 0;
  89                 a2 = 0;
  90                 b1 = 0;
  91                 b2 = c < 0 || frameok(w, r, c);
  92
  93                 for (; c < w->ww_i.r; c++) {
  94                         if (c + 1 >= wwncol) {
  95                                 a3 = 1;
  96                                 b3 = 1;
  97                         } else {
  98                                 a3 = w->ww_index == wwsmap[r - 1][c + 1];
  99                                 b3 = frameok(w, r, c + 1);
 100                         }
 101                         if (b2) {
 102                                 code = 0;
 103                                 if ((a1 || a2) && b1)
 104                                         code |= WWF_L;
 105                                 if ((a2 || a3) && b3)
 106                                         code |= WWF_R;
 107                                 if (code)
 108                                         wwframec(wframe, r, c, code);
 109                         }
 110                         a1 = a2;
 111                         a2 = a3;
 112                         b1 = b2;
 113                         b2 = b3;
 114                 }
 115                 if ((a1 || a2) && b1 && b2)
 116                         wwframec(wframe, r, c, WWF_L);
 117         }
 118
 119         if (w->ww_w.l > 0) {
 120                 r = w->ww_i.t - 1;
 121                 c = w->ww_w.l - 1;
 122                 a1 = 0;
 123                 a2 = 0;
 124                 b1 = 0;
 125                 b2 = r < 0 || frameok(w, r, c);
 126
 127                 for (; r < w->ww_i.b; r++) {
 128                         if (r + 1 >= wwnrow) {
 129                                 a3 = 1;
 130                                 b3 = 1;
 131                         } else {
 132                                 a3 = w->ww_index == wwsmap[r + 1][c + 1];
 133                                 b3 = frameok(w, r + 1, c);
 134                         }
 135                         if (b2) {
 136                                 code = 0;
 137                                 if ((a1 || a2) && b1)
 138                                         code |= WWF_U;
 139                                 if ((a2 || a3) && b3)
 140                                         code |= WWF_D;
 141                                 if (code)
 142                                         wwframec(wframe, r, c, code);
 143                         }
 144                         a1 = a2;
 145                         a2 = a3;
 146                         b1 = b2;
 147                         b2 = b3;
 148                 }
 149                 if ((a1 || a2) && b1 && b2)
 150                         wwframec(wframe, r, c, WWF_U);
 151         }
 152
 153         if (w->ww_w.r < wwncol) {
 154                 r = w->ww_i.t - 1;
 155                 c = w->ww_w.r;
 156                 a1 = 0;
 157                 a2 = 0;
 158                 b1 = 0;
 159                 b2 = r < 0 || frameok(w, r, c);
 160
 161                 for (; r < w->ww_i.b; r++) {
 162                         if (r + 1 >= wwnrow) {
 163                                 a3 = 1;
 164                                 b3 = 1;
 165                         } else {
 166                                 a3 = w->ww_index == wwsmap[r + 1][c - 1];
 167                                 b3 = frameok(w, r + 1, c);
 168                         }
 169                         if (b2) {
 170                                 code = 0;
 171                                 if ((a1 || a2) && b1)
 172                                         code |= WWF_U;
 173                                 if ((a2 || a3) && b3)
 174                                         code |= WWF_D;
 175                                 if (code)
 176                                         wwframec(wframe, r, c, code);
 177                         }
 178                         a1 = a2;
 179                         a2 = a3;
 180                         b1 = b2;
 181                         b2 = b3;
 182                 }
 183                 if ((a1 || a2) && b1 && b2)
 184                         wwframec(wframe, r, c, WWF_U);
 185         }
 186 }
 187
 188 void
 189 wwframec(struct ww *f, int r, int c, char code)
 190 {
 191         char oldcode;
 192         unsigned char *smap;
 193
 194         if (r < f->ww_i.t || r >= f->ww_i.b || c < f->ww_i.l || c >= f->ww_i.r)
 195                 return;
 196
 197         smap = &wwsmap[r][c];
 198
 199         {
 200                 struct ww *w;
 201
 202                 w = wwindex[*smap];
 203                 if (w->ww_order > f->ww_order) {
 204                         if (w != &wwnobody && w->ww_win[r][c] == 0)
 205                                 w->ww_nvis[r]--;
 206                         *smap = f->ww_index;
 207                 }
 208         }
 209
 210         if (f->ww_fmap != 0) {
 211                 char *fmap;
 212
 213                 fmap = &f->ww_fmap[r][c];
 214                 oldcode = *fmap;
 215                 *fmap |= code;
 216                 if (code & WWF_TOP)
 217                         *fmap &= ~WWF_LABEL;
 218                 code = *fmap;
 219         } else
 220                 oldcode = 0;
 221         {
 222                 char *win = &f->ww_win[r][c];
 223
 224                 if (*win == WWM_GLS && *smap == f->ww_index)
 225                         f->ww_nvis[r]++;
 226                 *win &= ~WWM_GLS;
 227         }
 228         if (oldcode != code && (code & WWF_LABEL) == 0) {
 229                 short frame;
 230
 231                 frame = tt.tt_frame[code & WWF_MASK];
 232                 f->ww_buf[r][c].c_w = frame;
 233                 if (wwsmap[r][c] == f->ww_index) {
 234                         wwtouched[r] |= WWU_TOUCHED;
 235                         wwns[r][c].c_w = frame;
 236                 }
 237         }
 238 }