usr.bin/window/wwframe.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Edward Wang at The University of California, Berkeley.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)wwframe.c        8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/window/wwframe.c,v 1.1.1.1.14.1 2001/05/17 09:45:01 obrien Exp $
  38  * $DragonFly: src/usr.bin/window/wwframe.c,v 1.2 2003/06/17 04:29:34 dillon Exp $
  39  */
  40
  41 #include "ww.h"
  42 #include "tt.h"
  43
  44 #define frameok(w, r, c) (w1 = wwindex[wwsmap[r][c]], \
  45         w1->ww_fmap || w1->ww_order > (w)->ww_order)
  46
  47 wwframe(w, wframe)
  48 register struct ww *w;
  49 struct ww *wframe;
  50 {
  51         register r, c;
  52         char a1, a2, a3;
  53         char b1, b2, b3;
  54         register char *smap;
  55         register code;
  56         register struct ww *w1;
  57
  58         if (w->ww_w.t > 0) {
  59                 r = w->ww_w.t - 1;
  60                 c = w->ww_i.l - 1;
  61                 smap = &wwsmap[r + 1][c + 1];
  62                 a1 = 0;
  63                 a2 = 0;
  64                 b1 = 0;
  65                 b2 = c < 0 || frameok(w, r, c);
  66
  67                 for (; c < w->ww_i.r; c++) {
  68                         if (c + 1 >= wwncol) {
  69                                 a3 = 1;
  70                                 b3 = 1;
  71                         } else {
  72                                 a3 = w->ww_index == *smap++;
  73                                 b3 = frameok(w, r, c + 1);
  74                         }
  75                         if (b2) {
  76                                 code = 0;
  77                                 if ((a1 || a2) && b1)
  78                                         code |= WWF_L;
  79                                 if ((a2 || a3) && b3)
  80                                         code |= WWF_R;
  81                                 if (code)
  82                                         wwframec(wframe, r, c, code|WWF_TOP);
  83                         }
  84                         a1 = a2;
  85                         a2 = a3;
  86                         b1 = b2;
  87                         b2 = b3;
  88                 }
  89                 if ((a1 || a2) && b1 && b2)
  90                         wwframec(wframe, r, c, WWF_L|WWF_TOP);
  91         }
  92
  93         if (w->ww_w.b < wwnrow) {
  94                 r = w->ww_w.b;
  95                 c = w->ww_i.l - 1;
  96                 smap = &wwsmap[r - 1][c + 1];
  97                 a1 = 0;
  98                 a2 = 0;
  99                 b1 = 0;
 100                 b2 = c < 0 || frameok(w, r, c);
 101
 102                 for (; c < w->ww_i.r; c++) {
 103                         if (c + 1 >= wwncol) {
 104                                 a3 = 1;
 105                                 b3 = 1;
 106                         } else {
 107                                 a3 = w->ww_index == *smap++;
 108                                 b3 = frameok(w, r, c + 1);
 109                         }
 110                         if (b2) {
 111                                 code = 0;
 112                                 if ((a1 || a2) && b1)
 113                                         code |= WWF_L;
 114                                 if ((a2 || a3) && b3)
 115                                         code |= WWF_R;
 116                                 if (code)
 117                                         wwframec(wframe, r, c, code);
 118                         }
 119                         a1 = a2;
 120                         a2 = a3;
 121                         b1 = b2;
 122                         b2 = b3;
 123                 }
 124                 if ((a1 || a2) && b1 && b2)
 125                         wwframec(wframe, r, c, WWF_L);
 126         }
 127
 128         if (w->ww_w.l > 0) {
 129                 r = w->ww_i.t - 1;
 130                 c = w->ww_w.l - 1;
 131                 a1 = 0;
 132                 a2 = 0;
 133                 b1 = 0;
 134                 b2 = r < 0 || frameok(w, r, c);
 135
 136                 for (; r < w->ww_i.b; r++) {
 137                         if (r + 1 >= wwnrow) {
 138                                 a3 = 1;
 139                                 b3 = 1;
 140                         } else {
 141                                 a3 = w->ww_index == wwsmap[r + 1][c + 1];
 142                                 b3 = frameok(w, r + 1, c);
 143                         }
 144                         if (b2) {
 145                                 code = 0;
 146                                 if ((a1 || a2) && b1)
 147                                         code |= WWF_U;
 148                                 if ((a2 || a3) && b3)
 149                                         code |= WWF_D;
 150                                 if (code)
 151                                         wwframec(wframe, r, c, code);
 152                         }
 153                         a1 = a2;
 154                         a2 = a3;
 155                         b1 = b2;
 156                         b2 = b3;
 157                 }
 158                 if ((a1 || a2) && b1 && b2)
 159                         wwframec(wframe, r, c, WWF_U);
 160         }
 161
 162         if (w->ww_w.r < wwncol) {
 163                 r = w->ww_i.t - 1;
 164                 c = w->ww_w.r;
 165                 a1 = 0;
 166                 a2 = 0;
 167                 b1 = 0;
 168                 b2 = r < 0 || frameok(w, r, c);
 169
 170                 for (; r < w->ww_i.b; r++) {
 171                         if (r + 1 >= wwnrow) {
 172                                 a3 = 1;
 173                                 b3 = 1;
 174                         } else {
 175                                 a3 = w->ww_index == wwsmap[r + 1][c - 1];
 176                                 b3 = frameok(w, r + 1, c);
 177                         }
 178                         if (b2) {
 179                                 code = 0;
 180                                 if ((a1 || a2) && b1)
 181                                         code |= WWF_U;
 182                                 if ((a2 || a3) && b3)
 183                                         code |= WWF_D;
 184                                 if (code)
 185                                         wwframec(wframe, r, c, code);
 186                         }
 187                         a1 = a2;
 188                         a2 = a3;
 189                         b1 = b2;
 190                         b2 = b3;
 191                 }
 192                 if ((a1 || a2) && b1 && b2)
 193                         wwframec(wframe, r, c, WWF_U);
 194         }
 195 }
 196
 197 wwframec(f, r, c, code)
 198 register struct ww *f;
 199 register r, c;
 200 char code;
 201 {
 202         char oldcode;
 203         register char *smap;
 204
 205         if (r < f->ww_i.t || r >= f->ww_i.b || c < f->ww_i.l || c >= f->ww_i.r)
 206                 return;
 207
 208         smap = &wwsmap[r][c];
 209
 210         {
 211                 register struct ww *w;
 212
 213                 w = wwindex[*smap];
 214                 if (w->ww_order > f->ww_order) {
 215                         if (w != &wwnobody && w->ww_win[r][c] == 0)
 216                                 w->ww_nvis[r]--;
 217                         *smap = f->ww_index;
 218                 }
 219         }
 220
 221         if (f->ww_fmap != 0) {
 222                 register char *fmap;
 223
 224                 fmap = &f->ww_fmap[r][c];
 225                 oldcode = *fmap;
 226                 *fmap |= code;
 227                 if (code & WWF_TOP)
 228                         *fmap &= ~WWF_LABEL;
 229                 code = *fmap;
 230         } else
 231                 oldcode = 0;
 232         {
 233                 register char *win = &f->ww_win[r][c];
 234
 235                 if (*win == WWM_GLS && *smap == f->ww_index)
 236                         f->ww_nvis[r]++;
 237                 *win &= ~WWM_GLS;
 238         }
 239         if (oldcode != code && (code & WWF_LABEL) == 0) {
 240                 register short frame;
 241
 242                 frame = tt.tt_frame[code & WWF_MASK];
 243                 f->ww_buf[r][c].c_w = frame;
 244                 if (wwsmap[r][c] == f->ww_index) {
 245                         wwtouched[r] |= WWU_TOUCHED;
 246                         wwns[r][c].c_w = frame;
 247                 }
 248         }
 249 }