usr.bin/window/wwwrite.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
  37 #ifndef lint
  38 static char sccsid[] = "@(#)wwwrite.c   8.1 (Berkeley) 6/6/93";
  39 static char rcsid[] = "@(#)$FreeBSD$";
  40 #endif /* not lint */
  41
  42 #include "ww.h"
  43 #include "tt.h"
  44 #include "char.h"
  45
  46 #define UPDATE() \
  47         if (!w->ww_noupdate && w->ww_cur.r >= 0 && w->ww_cur.r < wwnrow && \
  48             wwtouched[w->ww_cur.r]) \
  49                 wwupdate1(w->ww_cur.r, w->ww_cur.r + 1)
  50
  51 /*
  52  * To support control character expansion, we save the old
  53  * p and q values in r and s, and point p at the beginning
  54  * of the expanded string, and q at some safe place beyond it
  55  * (p + 10).  At strategic points in the loops, we check
  56  * for (r && !*p) and restore the saved values back into
  57  * p and q.  Essentially, we implement a stack of depth 2,
  58  * to avoid recursion, which might be a better idea.
  59  */
  60 wwwrite(w, p, n)
  61 register struct ww *w;
  62 register unsigned char *p;
  63 int n;
  64 {
  65         char hascursor;
  66         unsigned char *savep = p;
  67         unsigned char *q = p + n;
  68         char *r = 0;
  69         char *s;
  70
  71 #ifdef lint
  72         s = 0;                  /* define it before possible use */
  73 #endif
  74         if (hascursor = w->ww_hascursor)
  75                 wwcursor(w, 0);
  76         while (p < q && !w->ww_stopped && (!wwinterrupt() || w->ww_nointr)) {
  77                 if (r && !*p) {
  78                         p = r;
  79                         q = s;
  80                         r = 0;
  81                         continue;
  82                 }
  83                 if (w->ww_wstate == 0 &&
  84                     (isprt(*p) || w->ww_unctrl && isunctrl(*p))) {
  85                         register i;
  86                         register union ww_char *bp;
  87                         int col, col1;
  88
  89                         if (w->ww_insert) {     /* this is very slow */
  90                                 if (*p == '\t') {
  91                                         p++;
  92                                         w->ww_cur.c += 8 -
  93                                                 (w->ww_cur.c - w->ww_w.l & 7);
  94                                         goto chklf;
  95                                 }
  96                                 if (!isprt(*p)) {
  97                                         r = p + 1;
  98                                         s = q;
  99                                         p = unctrl(*p);
 100                                         q = p + 10;
 101                                 }
 102                                 wwinschar(w, w->ww_cur.r, w->ww_cur.c,
 103                                         *p++, w->ww_modes);
 104                                 goto right;
 105                         }
 106
 107                         bp = &w->ww_buf[w->ww_cur.r][w->ww_cur.c];
 108                         i = w->ww_cur.c;
 109                         while (i < w->ww_w.r && p < q)
 110                                 if (!*p && r) {
 111                                         p = r;
 112                                         q = s;
 113                                         r = 0;
 114                                 } else if (*p == '\t') {
 115                                         register tmp = 8 - (i - w->ww_w.l & 7);
 116                                         p++;
 117                                         i += tmp;
 118                                         bp += tmp;
 119                                 } else if (isprt(*p)) {
 120                                         bp++->c_w = *p++
 121                                                 | w->ww_modes << WWC_MSHIFT;
 122                                         i++;
 123                                 } else if (w->ww_unctrl && isunctrl(*p)) {
 124                                         r = p + 1;
 125                                         s = q;
 126                                         p = unctrl(*p);
 127                                         q = p + 10;
 128                                 } else
 129                                         break;
 130                         col = MAX(w->ww_cur.c, w->ww_i.l);
 131                         col1 = MIN(i, w->ww_i.r);
 132                         w->ww_cur.c = i;
 133                         if (w->ww_cur.r >= w->ww_i.t
 134                             && w->ww_cur.r < w->ww_i.b) {
 135                                 register union ww_char *ns = wwns[w->ww_cur.r];
 136                                 register char *smap = &wwsmap[w->ww_cur.r][col];
 137                                 register char *win = w->ww_win[w->ww_cur.r];
 138                                 int nchanged = 0;
 139
 140                                 bp = w->ww_buf[w->ww_cur.r];
 141                                 for (i = col; i < col1; i++)
 142                                         if (*smap++ == w->ww_index) {
 143                                                 nchanged++;
 144                                                 ns[i].c_w = bp[i].c_w
 145                                                         ^ win[i] << WWC_MSHIFT;
 146                                         }
 147                                 if (nchanged > 0)
 148                                         wwtouched[w->ww_cur.r] |= WWU_TOUCHED;
 149                         }
 150                 chklf:
 151                         if (w->ww_cur.c >= w->ww_w.r)
 152                                 goto crlf;
 153                 } else switch (w->ww_wstate) {
 154                 case 0:
 155                         switch (*p++) {
 156                         case '\n':
 157                                 if (w->ww_mapnl)
 158                 crlf:
 159                                         w->ww_cur.c = w->ww_w.l;
 160                 lf:
 161                                 UPDATE();
 162                                 if (++w->ww_cur.r >= w->ww_w.b) {
 163                                         w->ww_cur.r = w->ww_w.b - 1;
 164                                         if (w->ww_w.b < w->ww_b.b) {
 165                                                 (void) wwscroll1(w, w->ww_i.t,
 166                                                         w->ww_i.b, 1, 0);
 167                                                 w->ww_buf++;
 168                                                 w->ww_b.t--;
 169                                                 w->ww_b.b--;
 170                                         } else
 171                                                 wwdelline(w, w->ww_b.t);
 172                                 }
 173                                 break;
 174                         case '\b':
 175                                 if (--w->ww_cur.c < w->ww_w.l) {
 176                                         w->ww_cur.c = w->ww_w.r - 1;
 177                                         goto up;
 178                                 }
 179                                 break;
 180                         case '\r':
 181                                 w->ww_cur.c = w->ww_w.l;
 182                                 break;
 183                         case ctrl('g'):
 184                                 ttputc(ctrl('g'));
 185                                 break;
 186                         case ctrl('['):
 187                                 w->ww_wstate = 1;
 188                                 break;
 189                         }
 190                         break;
 191                 case 1:
 192                         w->ww_wstate = 0;
 193                         switch (*p++) {
 194                         case '@':
 195                                 w->ww_insert = 1;
 196                                 break;
 197                         case 'A':
 198                 up:
 199                                 UPDATE();
 200                                 if (--w->ww_cur.r < w->ww_w.t) {
 201                                         w->ww_cur.r = w->ww_w.t;
 202                                         if (w->ww_w.t > w->ww_b.t) {
 203                                                 (void) wwscroll1(w, w->ww_i.t,
 204                                                         w->ww_i.b, -1, 0);
 205                                                 w->ww_buf--;
 206                                                 w->ww_b.t++;
 207                                                 w->ww_b.b++;
 208                                         } else
 209                                                 wwinsline(w, w->ww_b.t);
 210                                 }
 211                                 break;
 212                         case 'B':
 213                                 goto lf;
 214                         case 'C':
 215                 right:
 216                                 w->ww_cur.c++;
 217                                 goto chklf;
 218                         case 'E':
 219                                 w->ww_buf -= w->ww_w.t - w->ww_b.t;
 220                                 w->ww_b.t = w->ww_w.t;
 221                                 w->ww_b.b = w->ww_b.t + w->ww_b.nr;
 222                                 w->ww_cur.r = w->ww_w.t;
 223                                 w->ww_cur.c = w->ww_w.l;
 224                                 wwclreos(w, w->ww_w.t, w->ww_w.l);
 225                                 break;
 226                         case 'H':
 227                                 UPDATE();
 228                                 w->ww_cur.r = w->ww_w.t;
 229                                 w->ww_cur.c = w->ww_w.l;
 230                                 break;
 231                         case 'J':
 232                                 wwclreos(w, w->ww_cur.r, w->ww_cur.c);
 233                                 break;
 234                         case 'K':
 235                                 wwclreol(w, w->ww_cur.r, w->ww_cur.c);
 236                                 break;
 237                         case 'L':
 238                                 UPDATE();
 239                                 wwinsline(w, w->ww_cur.r);
 240                                 break;
 241                         case 'M':
 242                                 wwdelline(w, w->ww_cur.r);
 243                                 break;
 244                         case 'N':
 245                                 wwdelchar(w, w->ww_cur.r, w->ww_cur.c);
 246                                 break;
 247                         case 'O':
 248                                 w->ww_insert = 0;
 249                                 break;
 250                         case 'P':
 251                                 wwinschar(w, w->ww_cur.r, w->ww_cur.c, ' ', 0);
 252                                 break;
 253                         case 'X':
 254                                 wwupdate();
 255                                 break;
 256                         case 'Y':
 257                                 UPDATE();
 258                                 w->ww_wstate = 2;
 259                                 break;
 260                         case 'Z':
 261                                 wwupdate();
 262                                 xxflush(0);
 263                                 break;
 264                         case 's':
 265                                 w->ww_wstate = 4;
 266                                 break;
 267                         case 'r':
 268                                 w->ww_wstate = 5;
 269                                 break;
 270                         }
 271                         break;
 272                 case 2:
 273                         w->ww_cur.r = w->ww_w.t +
 274                                 (unsigned)(*p++ - ' ') % w->ww_w.nr;
 275                         w->ww_wstate = 3;
 276                         break;
 277                 case 3:
 278                         w->ww_cur.c = w->ww_w.l +
 279                                 (unsigned)(*p++ - ' ') % w->ww_w.nc;
 280                         w->ww_wstate = 0;
 281                         break;
 282                 case 4:
 283                         w->ww_modes |= *p++ & wwavailmodes;
 284                         w->ww_wstate = 0;
 285                         break;
 286                 case 5:
 287                         w->ww_modes &= ~*p++;
 288                         w->ww_wstate = 0;
 289                         break;
 290                 }
 291         }
 292         if (hascursor)
 293                 wwcursor(w, 1);
 294         wwnwwr++;
 295         wwnwwra += n;
 296         n = p - savep;
 297         wwnwwrc += n;
 298         return n;
 299 }