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[] =
  40   "$FreeBSD: src/usr.bin/window/wwwrite.c,v 1.2.14.1 2001/05/17 09:45:02 obrien Exp $";
  41 #endif /* not lint */
  42
  43 #include "ww.h"
  44 #include "tt.h"
  45 #include "char.h"
  46
  47 #define UPDATE() \
  48         if (!w->ww_noupdate && w->ww_cur.r >= 0 && w->ww_cur.r < wwnrow && \
  49             wwtouched[w->ww_cur.r]) \
  50                 wwupdate1(w->ww_cur.r, w->ww_cur.r + 1)
  51
  52 /*
  53  * To support control character expansion, we save the old
  54  * p and q values in r and s, and point p at the beginning
  55  * of the expanded string, and q at some safe place beyond it
  56  * (p + 10).  At strategic points in the loops, we check
  57  * for (r && !*p) and restore the saved values back into
  58  * p and q.  Essentially, we implement a stack of depth 2,
  59  * to avoid recursion, which might be a better idea.
  60  */
  61 wwwrite(w, p, n)
  62 register struct ww *w;
  63 register unsigned char *p;
  64 int n;
  65 {
  66         char hascursor;
  67         unsigned char *savep = p;
  68         unsigned char *q = p + n;
  69         char *r = 0;
  70         char *s;
  71
  72 #ifdef lint
  73         s = 0;                  /* define it before possible use */
  74 #endif
  75         if (hascursor = w->ww_hascursor)
  76                 wwcursor(w, 0);
  77         while (p < q && !w->ww_stopped && (!wwinterrupt() || w->ww_nointr)) {
  78                 if (r && !*p) {
  79                         p = r;
  80                         q = s;
  81                         r = 0;
  82                         continue;
  83                 }
  84                 if (w->ww_wstate == 0 &&
  85                     (isprt(*p) || w->ww_unctrl && isunctrl(*p))) {
  86                         register i;
  87                         register union ww_char *bp;
  88                         int col, col1;
  89
  90                         if (w->ww_insert) {     /* this is very slow */
  91                                 if (*p == '\t') {
  92                                         p++;
  93                                         w->ww_cur.c += 8 -
  94                                                 (w->ww_cur.c - w->ww_w.l & 7);
  95                                         goto chklf;
  96                                 }
  97                                 if (!isprt(*p)) {
  98                                         r = p + 1;
  99                                         s = q;
 100                                         p = unctrl(*p);
 101                                         q = p + 10;
 102                                 }
 103                                 wwinschar(w, w->ww_cur.r, w->ww_cur.c,
 104                                         *p++, w->ww_modes);
 105                                 goto right;
 106                         }
 107
 108                         bp = &w->ww_buf[w->ww_cur.r][w->ww_cur.c];
 109                         i = w->ww_cur.c;
 110                         while (i < w->ww_w.r && p < q)
 111                                 if (!*p && r) {
 112                                         p = r;
 113                                         q = s;
 114                                         r = 0;
 115                                 } else if (*p == '\t') {
 116                                         register tmp = 8 - (i - w->ww_w.l & 7);
 117                                         p++;
 118                                         i += tmp;
 119                                         bp += tmp;
 120                                 } else if (isprt(*p)) {
 121                                         bp++->c_w = *p++
 122                                                 | w->ww_modes << WWC_MSHIFT;
 123                                         i++;
 124                                 } else if (w->ww_unctrl && isunctrl(*p)) {
 125                                         r = p + 1;
 126                                         s = q;
 127                                         p = unctrl(*p);
 128                                         q = p + 10;
 129                                 } else
 130                                         break;
 131                         col = MAX(w->ww_cur.c, w->ww_i.l);
 132                         col1 = MIN(i, w->ww_i.r);
 133                         w->ww_cur.c = i;
 134                         if (w->ww_cur.r >= w->ww_i.t
 135                             && w->ww_cur.r < w->ww_i.b) {
 136                                 register union ww_char *ns = wwns[w->ww_cur.r];
 137                                 register char *smap = &wwsmap[w->ww_cur.r][col];
 138                                 register char *win = w->ww_win[w->ww_cur.r];
 139                                 int nchanged = 0;
 140
 141                                 bp = w->ww_buf[w->ww_cur.r];
 142                                 for (i = col; i < col1; i++)
 143                                         if (*smap++ == w->ww_index) {
 144                                                 nchanged++;
 145                                                 ns[i].c_w = bp[i].c_w
 146                                                         ^ win[i] << WWC_MSHIFT;
 147                                         }
 148                                 if (nchanged > 0)
 149                                         wwtouched[w->ww_cur.r] |= WWU_TOUCHED;
 150                         }
 151                 chklf:
 152                         if (w->ww_cur.c >= w->ww_w.r)
 153                                 goto crlf;
 154                 } else switch (w->ww_wstate) {
 155                 case 0:
 156                         switch (*p++) {
 157                         case '\n':
 158                                 if (w->ww_mapnl)
 159                 crlf:
 160                                         w->ww_cur.c = w->ww_w.l;
 161                 lf:
 162                                 UPDATE();
 163                                 if (++w->ww_cur.r >= w->ww_w.b) {
 164                                         w->ww_cur.r = w->ww_w.b - 1;
 165                                         if (w->ww_w.b < w->ww_b.b) {
 166                                                 (void) wwscroll1(w, w->ww_i.t,
 167                                                         w->ww_i.b, 1, 0);
 168                                                 w->ww_buf++;
 169                                                 w->ww_b.t--;
 170                                                 w->ww_b.b--;
 171                                         } else
 172                                                 wwdelline(w, w->ww_b.t);
 173                                 }
 174                                 break;
 175                         case '\b':
 176                                 if (--w->ww_cur.c < w->ww_w.l) {
 177                                         w->ww_cur.c = w->ww_w.r - 1;
 178                                         goto up;
 179                                 }
 180                                 break;
 181                         case '\r':
 182                                 w->ww_cur.c = w->ww_w.l;
 183                                 break;
 184                         case ctrl('g'):
 185                                 ttputc(ctrl('g'));
 186                                 break;
 187                         case ctrl('['):
 188                                 w->ww_wstate = 1;
 189                                 break;
 190                         }
 191                         break;
 192                 case 1:
 193                         w->ww_wstate = 0;
 194                         switch (*p++) {
 195                         case '@':
 196                                 w->ww_insert = 1;
 197                                 break;
 198                         case 'A':
 199                 up:
 200                                 UPDATE();
 201                                 if (--w->ww_cur.r < w->ww_w.t) {
 202                                         w->ww_cur.r = w->ww_w.t;
 203                                         if (w->ww_w.t > w->ww_b.t) {
 204                                                 (void) wwscroll1(w, w->ww_i.t,
 205                                                         w->ww_i.b, -1, 0);
 206                                                 w->ww_buf--;
 207                                                 w->ww_b.t++;
 208                                                 w->ww_b.b++;
 209                                         } else
 210                                                 wwinsline(w, w->ww_b.t);
 211                                 }
 212                                 break;
 213                         case 'B':
 214                                 goto lf;
 215                         case 'C':
 216                 right:
 217                                 w->ww_cur.c++;
 218                                 goto chklf;
 219                         case 'E':
 220                                 w->ww_buf -= w->ww_w.t - w->ww_b.t;
 221                                 w->ww_b.t = w->ww_w.t;
 222                                 w->ww_b.b = w->ww_b.t + w->ww_b.nr;
 223                                 w->ww_cur.r = w->ww_w.t;
 224                                 w->ww_cur.c = w->ww_w.l;
 225                                 wwclreos(w, w->ww_w.t, w->ww_w.l);
 226                                 break;
 227                         case 'H':
 228                                 UPDATE();
 229                                 w->ww_cur.r = w->ww_w.t;
 230                                 w->ww_cur.c = w->ww_w.l;
 231                                 break;
 232                         case 'J':
 233                                 wwclreos(w, w->ww_cur.r, w->ww_cur.c);
 234                                 break;
 235                         case 'K':
 236                                 wwclreol(w, w->ww_cur.r, w->ww_cur.c);
 237                                 break;
 238                         case 'L':
 239                                 UPDATE();
 240                                 wwinsline(w, w->ww_cur.r);
 241                                 break;
 242                         case 'M':
 243                                 wwdelline(w, w->ww_cur.r);
 244                                 break;
 245                         case 'N':
 246                                 wwdelchar(w, w->ww_cur.r, w->ww_cur.c);
 247                                 break;
 248                         case 'O':
 249                                 w->ww_insert = 0;
 250                                 break;
 251                         case 'P':
 252                                 wwinschar(w, w->ww_cur.r, w->ww_cur.c, ' ', 0);
 253                                 break;
 254                         case 'X':
 255                                 wwupdate();
 256                                 break;
 257                         case 'Y':
 258                                 UPDATE();
 259                                 w->ww_wstate = 2;
 260                                 break;
 261                         case 'Z':
 262                                 wwupdate();
 263                                 xxflush(0);
 264                                 break;
 265                         case 's':
 266                                 w->ww_wstate = 4;
 267                                 break;
 268                         case 'r':
 269                                 w->ww_wstate = 5;
 270                                 break;
 271                         }
 272                         break;
 273                 case 2:
 274                         w->ww_cur.r = w->ww_w.t +
 275                                 (unsigned)(*p++ - ' ') % w->ww_w.nr;
 276                         w->ww_wstate = 3;
 277                         break;
 278                 case 3:
 279                         w->ww_cur.c = w->ww_w.l +
 280                                 (unsigned)(*p++ - ' ') % w->ww_w.nc;
 281                         w->ww_wstate = 0;
 282                         break;
 283                 case 4:
 284                         w->ww_modes |= *p++ & wwavailmodes;
 285                         w->ww_wstate = 0;
 286                         break;
 287                 case 5:
 288                         w->ww_modes &= ~*p++;
 289                         w->ww_wstate = 0;
 290                         break;
 291                 }
 292         }
 293         if (hascursor)
 294                 wwcursor(w, 1);
 295         wwnwwr++;
 296         wwnwwra += n;
 297         n = p - savep;
 298         wwnwwrc += n;
 299         return n;
 300 }