troff/n10.c

   1 /*
   2 n10.c
   3
   4 Device interfaces
   5 */
   6
   7 #include "tdef.h"
   8 #include "ext.h"
   9 #include "fns.h"
  10 #include <ctype.h>
  11
  12 Term    t;      /* terminal characteristics */
  13
  14 int     dtab;
  15 int     plotmode;
  16 int     esct;
  17
  18 enum    { Notype = 0, Type = 1 };
  19
  20 static char *parse(char *s, int typeit) /* convert \0, etc to nroff driving table format */
  21 {               /* typeit => add a type id to the front for later use */
  22         static char buf[100], *t, *obuf;
  23         int quote = 0;
  24         int wc;
  25
  26         obuf = typeit == Type ? buf : buf+1;
  27 #ifdef UNICODE
  28         if (readutf8(&wc, s) > 1) {     /* it's multibyte, */
  29                 buf[0] = MBchar;
  30                 strcpy(buf+1, s);
  31                 return obuf;
  32         }                       /* so just hand it back */
  33 #endif  /*UNICODE*/
  34         buf[0] = Troffchar;
  35         t = buf + 1;
  36         if (*s == '"') {
  37                 s++;
  38                 quote = 1;
  39         }
  40         for (;;) {
  41                 if (quote && *s == '"') {
  42                         s++;
  43                         break;
  44                 }
  45                 if (!quote && (*s == ' ' || *s == '\t' || *s == '\n' || *s == '\0'))
  46                         break;
  47                 if (*s != '\\')
  48                         *t++ = *s++;
  49                 else {
  50                         s++;    /* skip \\ */
  51                         if (isdigit(s[0]) && isdigit(s[1]) && isdigit(s[2])) {
  52                                 *t++ = (s[0]-'0')<<6 | (s[1]-'0')<<3 | s[2]-'0';
  53                                 s += 2;
  54                         } else if (isdigit(s[0])) {
  55                                 *t++ = *s - '0';
  56                         } else if (*s == 'b') {
  57                                 *t++ = '\b';
  58                         } else if (*s == 'n') {
  59                                 *t++ = '\n';
  60                         } else if (*s == 'r') {
  61                                 *t++ = '\r';
  62                         } else if (*s == 't') {
  63                                 *t++ = '\t';
  64                         } else {
  65                                 *t++ = *s;
  66                         }
  67                         s++;
  68                 }
  69         }
  70         *t = '\0';
  71         return obuf;
  72 }
  73
  74
  75 static int getnrfont(FILE *fp)  /* read the nroff description file */
  76 {
  77         Chwid chtemp[NCHARS];
  78         static Chwid chinit;
  79         int i, nw, n, wid, type;
  80         char buf[100], ch[100], s1[100], s2[100];
  81         int wc;
  82
  83
  84         chinit.wid = 1;
  85         chinit.str = "";
  86         for (i = 0; i < ALPHABET; i++) {
  87                 chtemp[i] = chinit;     /* zero out to begin with */
  88                 chtemp[i].num = chtemp[i].code = i;     /* every alphabetic character is itself */
  89                 chtemp[i].wid = 1;      /* default ascii widths */
  90         }
  91         skipline(fp);
  92         nw = ALPHABET;
  93         while (fgets(buf, sizeof buf, fp) != NULL) {
  94                 sscanf(buf, "%s %s %[^\n]", ch, s1, s2);
  95                 if (!eq(s1, "\"")) {    /* genuine new character */
  96                         sscanf(s1, "%d", &wid);
  97                 } /* else it's a synonym for prev character, */
  98                         /* so leave previous values intact */
  99
 100                 /* decide what kind of alphabet it might come from */
 101
 102                 if (strlen(ch) == 1) {  /* it's ascii */
 103                         n = ch[0];      /* origin includes non-graphics */
 104                         chtemp[n].num = ch[0];
 105                 } else if (ch[0] == '\\' && ch[1] == '0') {
 106                         n = strtol(ch + 1, 0, 0);       /* \0octal or \0xhex */
 107                         chtemp[n].num = n;
 108 #ifdef UNICODE
 109                 } else if (readutf8(&wc, ch) > 1) {
 110                         chtemp[nw].num = chadd(ch, MBchar, Install);
 111                         n = nw;
 112                         nw++;
 113 #endif  /*UNICODE*/
 114                 } else {
 115                         if (strcmp(ch, "---") == 0) { /* no name */
 116                                 sprintf(ch, "%d", chtemp[nw].code);
 117                                 type = Number;
 118                         } else
 119                                 type = Troffchar;
 120 /* BUG in here somewhere when same character occurs twice in table */
 121                         chtemp[nw].num = chadd(ch, type, Install);
 122                         n = nw;
 123                         nw++;
 124                 }
 125                 chtemp[n].wid = wid;
 126                 chtemp[n].str = strdupl(parse(s2, Type));
 127         }
 128         t.tfont.nchars = nw;
 129         t.tfont.wp = (Chwid *) malloc(nw * sizeof(Chwid));
 130         if (t.tfont.wp == NULL)
 131                 return -1;
 132         for (i = 0; i < nw; i++)
 133                 t.tfont.wp[i] = chtemp[i];
 134         return 1;
 135 }
 136
 137
 138 void n_ptinit(void)
 139 {
 140         int i;
 141         char *p;
 142         char opt[50], cmd[100];
 143         FILE *fp;
 144
 145         hmot = n_hmot;
 146         makem = n_makem;
 147         setabs = n_setabs;
 148         setch = n_setch;
 149         sethl = n_sethl;
 150         setht = n_setht;
 151         setslant = n_setslant;
 152         vmot = n_vmot;
 153         xlss = n_xlss;
 154         findft = n_findft;
 155         width = n_width;
 156         mchbits = n_mchbits;
 157         ptlead = n_ptlead;
 158         ptout = n_ptout;
 159         ptpause = n_ptpause;
 160         setfont = n_setfont;
 161         setps = n_setps;
 162         setwd = n_setwd;
 163
 164         if ((p = getenv("NROFFTERM")) != 0)
 165                 strcpy(devname, p);
 166         if (termtab[0] == 0)
 167                 strcpy(termtab, NTERMDIR);
 168         if (fontdir[0] == 0)
 169                 strcpy(fontdir, "");
 170         if (devname[0] == 0)
 171                 strcpy(devname, NDEVNAME);
 172         pl = 11*INCH;
 173         po = PO;
 174         hyf = 0;
 175         ascii = 1;
 176         lg = 0;
 177         fontlab[1] = 'R';
 178         fontlab[2] = 'I';
 179         fontlab[3] = 'B';
 180         fontlab[4] = PAIR('B','I');
 181         fontlab[5] = 'D';
 182         bdtab[3] = 3;
 183         bdtab[4] = 3;
 184
 185         /* hyphalg = 0; for testing */
 186
 187         strcat(termtab, devname);
 188         if ((fp = fopen(termtab, "r")) == NULL) {
 189                 ERROR "cannot open %s", termtab WARN;
 190                 exit(-1);
 191         }
 192
 193
 194 /* this loop isn't robust about input format errors. */
 195 /* it assumes  name, name-value pairs..., charset */
 196 /* god help us if we get out of sync. */
 197
 198         fscanf(fp, "%s", cmd);  /* should be device name... */
 199         if (!is(devname) && trace)
 200                 ERROR "wrong terminal name: saw %s, wanted %s", cmd, devname WARN;
 201         for (;;) {
 202                 fscanf(fp, "%s", cmd);
 203                 if (is("charset"))
 204                         break;
 205                 fscanf(fp, " %[^\n]", opt);
 206                 if (is("bset")) t.bset = atoi(opt);
 207                 else if (is("breset")) t.breset = atoi(opt);
 208                 else if (is("Hor")) t.Hor = atoi(opt);
 209                 else if (is("Vert")) t.Vert = atoi(opt);
 210                 else if (is("Newline")) t.Newline = atoi(opt);
 211                 else if (is("Char")) t.Char = atoi(opt);
 212                 else if (is("Em")) t.Em = atoi(opt);
 213                 else if (is("Halfline")) t.Halfline = atoi(opt);
 214                 else if (is("Adj")) t.Adj = atoi(opt);
 215                 else if (is("twinit")) t.twinit = strdupl(parse(opt, Notype));
 216                 else if (is("twrest")) t.twrest = strdupl(parse(opt, Notype));
 217                 else if (is("twnl")) t.twnl = strdupl(parse(opt, Notype));
 218                 else if (is("hlr")) t.hlr = strdupl(parse(opt, Notype));
 219                 else if (is("hlf")) t.hlf = strdupl(parse(opt, Notype));
 220                 else if (is("flr")) t.flr = strdupl(parse(opt, Notype));
 221                 else if (is("bdon")) t.bdon = strdupl(parse(opt, Notype));
 222                 else if (is("bdoff")) t.bdoff = strdupl(parse(opt, Notype));
 223                 else if (is("iton")) t.iton = strdupl(parse(opt, Notype));
 224                 else if (is("itoff")) t.itoff = strdupl(parse(opt, Notype));
 225                 else if (is("ploton")) t.ploton = strdupl(parse(opt, Notype));
 226                 else if (is("plotoff")) t.plotoff = strdupl(parse(opt, Notype));
 227                 else if (is("up")) t.up = strdupl(parse(opt, Notype));
 228                 else if (is("down")) t.down = strdupl(parse(opt, Notype));
 229                 else if (is("right")) t.right = strdupl(parse(opt, Notype));
 230                 else if (is("left")) t.left = strdupl(parse(opt, Notype));
 231                 else
 232                         ERROR "bad tab.%s file, %s %s", devname, cmd, opt WARN;
 233         }
 234
 235         getnrfont(fp);
 236         fclose(fp);
 237
 238         sps = EM;
 239         ics = EM * 2;
 240         dtab = 8 * t.Em;
 241         for (i = 0; i < 16; i++)
 242                 tabtab[i] = dtab * (i + 1);
 243         pl = 11 * INCH;
 244         po = PO;
 245         spacesz = SS;
 246         lss = lss1 = VS;
 247         ll = ll1 = lt = lt1 = LL;
 248         smnt = nfonts = 5;      /* R I B BI S */
 249         n_specnames();  /* install names like "hyphen", etc. */
 250         if (eqflg)
 251                 t.Adj = t.Hor;
 252 }
 253
 254
 255 void n_specnames(void)
 256 {
 257
 258         int     i;
 259
 260         for (i = 0; spnames[i].n; i++)
 261                 *spnames[i].n = chadd(spnames[i].v, Troffchar, Install);
 262         if (c_isalnum == 0)
 263                 c_isalnum = NROFFCHARS;
 264 }
 265
 266 void twdone(void)
 267 {
 268         if (!TROFF && t.twrest) {
 269                 obufp = obuf;
 270                 oputs(t.twrest);
 271                 flusho();
 272                 if (pipeflg) {
 273                         pclose(ptid);
 274                 }
 275                 restore_tty();
 276         }
 277 }
 278
 279
 280 void n_ptout(Tchar i)
 281 {
 282         *olinep++ = i;
 283         if (olinep >= &oline[LNSIZE])
 284                 olinep--;
 285         if (cbits(i) != '\n')
 286                 return;
 287         olinep--;
 288         lead += dip->blss + lss - t.Newline;
 289         dip->blss = 0;
 290         esct = esc = 0;
 291         if (olinep > oline) {
 292                 move();
 293                 ptout1();
 294                 oputs(t.twnl);
 295         } else {
 296                 lead += t.Newline;
 297                 move();
 298         }
 299         lead += dip->alss;
 300         dip->alss = 0;
 301         olinep = oline;
 302 }
 303
 304
 305 void ptout1(void)
 306 {
 307         int k;
 308         char *codep;
 309         int w, j, phyw;
 310         Tchar *q, i;
 311         static int oxfont = FT; /* start off in roman */
 312
 313         for (q = oline; q < olinep; q++) {
 314                 i = *q;
 315                 if (ismot(i)) {
 316                         j = absmot(i);
 317                         if (isnmot(i))
 318                                 j = -j;
 319                         if (isvmot(i))
 320                                 lead += j;
 321                         else
 322                                 esc += j;
 323                         continue;
 324                 }
 325                 if ((k = cbits(i)) <= ' ') {
 326                         switch (k) {
 327                         case ' ': /*space*/
 328                                 esc += t.Char;
 329                                 break;
 330                         case '\033':
 331                         case '\007':
 332                         case '\016':
 333                         case '\017':
 334                                 oput(k);
 335                                 break;
 336                         }
 337                         continue;
 338                 }
 339                 phyw = w = t.Char * t.tfont.wp[k].wid;
 340                 if (iszbit(i))
 341                         w = 0;
 342                 if (esc || lead)
 343                         move();
 344                 esct += w;
 345                 xfont = fbits(i);
 346                 if (xfont != oxfont) {
 347                         switch (oxfont) {
 348                         case ULFONT:    oputs(t.itoff); break;
 349                         case BDFONT:    oputs(t.bdoff); break;
 350                         case BIFONT:    oputs(t.itoff); oputs(t.bdoff); break;
 351                         }
 352                         switch (xfont) {
 353                         case ULFONT:
 354                                 if (*t.iton & 0377) oputs(t.iton); break;
 355                         case BDFONT:
 356                                 if (*t.bdon & 0377) oputs(t.bdon); break;
 357                         case BIFONT:
 358                                 if (*t.bdon & 0377) oputs(t.bdon);
 359                                 if (*t.iton & 0377) oputs(t.iton);
 360                                 break;
 361                         }
 362                         oxfont = xfont;
 363                 }
 364                 if ((xfont == ulfont || xfont == BIFONT) && !(*t.iton & 0377)) {
 365                         for (j = w / t.Char; j > 0; j--)
 366                                 oput('_');
 367                         for (j = w / t.Char; j > 0; j--)
 368                                 oput('\b');
 369                 }
 370                 if (!(*t.bdon & 0377) && ((j = bdtab[xfont]) || xfont == BDFONT || xfont == BIFONT))
 371                         j++;
 372                 else
 373                         j = 1;  /* number of overstrikes for bold */
 374                 if (k < ALPHABET) {     /* ordinary ascii */
 375                         oput(k);
 376                         while (--j > 0) {
 377                                 oput('\b');
 378                                 oput(k);
 379                         }
 380                 } else if (k >= t.tfont.nchars) {       /* BUG -- not really understood */
 381                         /* fprintf(stderr, "big char %d, name %s\n", k, chname(k));  */
 382                         oputs(chname(k)+1);     /* BUG: should separate Troffchar and MBchar... */
 383                 } else if (t.tfont.wp[k].str == 0) {
 384                         /* fprintf(stderr, "nostr char %d, name %s\n", k, chname(k)); */
 385                         oputs(chname(k)+1);     /* BUG: should separate Troffchar and MBchar... */
 386                 } else if (t.tfont.wp[k].str[0] == MBchar) {    /* parse() puts this on */
 387                         /* fprintf(stderr, "MBstr char %d, name %s\n", k, chname(k)); */
 388                         oputs(t.tfont.wp[k].str+1);
 389                 } else {
 390                         int oj = j;
 391                         /* fprintf(stderr, "str char %d, name %s\n", k, chname(k)); */
 392                         codep = t.tfont.wp[k].str+1;    /* Troffchar by default */
 393                         while (*codep != 0) {
 394                                 if (*codep & 0200) {
 395                                         codep = plot(codep);
 396                                         oput(' ');
 397                                 } else {
 398                                         if (*codep == '%')      /* escape */
 399                                                 codep++;
 400                                         oput(*codep);
 401                                         if (*codep == '\033')
 402                                                 oput(*++codep);
 403                                         else if (*codep != '\b')
 404                                                 for (j = oj; --j > 0; ) {
 405                                                         oput('\b');
 406                                                         oput(*codep);
 407                                                 }
 408                                         codep++;
 409                                 }
 410                         }
 411                 }
 412                 if (!w)
 413                         for (j = phyw / t.Char; j > 0; j--)
 414                                 oput('\b');
 415         }
 416 }
 417
 418
 419 char *plot(char *x)
 420 {
 421         int     i;
 422         char    *j, *k;
 423
 424         oputs(t.ploton);
 425         k = x;
 426         if ((*k & 0377) == 0200)
 427                 k++;
 428         for (; *k; k++) {
 429                 if (*k == '%') {        /* quote char within plot mode */
 430                         oput(*++k);
 431                 } else if (*k & 0200) {
 432                         if (*k & 0100) {
 433                                 if (*k & 040)
 434                                         j = t.up;
 435                                 else
 436                                         j = t.down;
 437                         } else {
 438                                 if (*k & 040)
 439                                         j = t.left;
 440                                 else
 441                                         j = t.right;
 442                         }
 443                         if ((i = *k & 037) == 0) {      /* 2nd 0200 turns it off */
 444                                 ++k;
 445                                 break;
 446                         }
 447                         while (i--)
 448                                 oputs(j);
 449                 } else
 450                         oput(*k);
 451         }
 452         oputs(t.plotoff);
 453         return(k);
 454 }
 455
 456
 457 void move(void)
 458 {
 459         int k;
 460         char *i, *j;
 461         char *p, *q;
 462         int iesct, dt;
 463
 464         iesct = esct;
 465         if (esct += esc)
 466                 i = "\0";
 467         else
 468                 i = "\n\0";
 469         j = t.hlf;
 470         p = t.right;
 471         q = t.down;
 472         if (lead) {
 473                 if (lead < 0) {
 474                         lead = -lead;
 475                         i = t.flr;
 476                         /*      if(!esct)i = t.flr; else i = "\0";*/
 477                         j = t.hlr;
 478                         q = t.up;
 479                 }
 480                 if (*i & 0377) {
 481                         k = lead / t.Newline;
 482                         lead = lead % t.Newline;
 483                         while (k--)
 484                                 oputs(i);
 485                 }
 486                 if (*j & 0377) {
 487                         k = lead / t.Halfline;
 488                         lead = lead % t.Halfline;
 489                         while (k--)
 490                                 oputs(j);
 491                 } else { /* no half-line forward, not at line begining */
 492                         k = lead / t.Newline;
 493                         lead = lead % t.Newline;
 494                         if (k > 0)
 495                                 esc = esct;
 496                         i = "\n";
 497                         while (k--)
 498                                 oputs(i);
 499                 }
 500         }
 501         if (esc) {
 502                 if (esc < 0) {
 503                         esc = -esc;
 504                         j = "\b";
 505                         p = t.left;
 506                 } else {
 507                         j = " ";
 508                         if (hflg)
 509                                 while ((dt = dtab - (iesct % dtab)) <= esc) {
 510                                         if (dt % t.Em)
 511                                                 break;
 512                                         oput(TAB);
 513                                         esc -= dt;
 514                                         iesct += dt;
 515                                 }
 516                 }
 517                 k = esc / t.Em;
 518                 esc = esc % t.Em;
 519                 while (k--)
 520                         oputs(j);
 521         }
 522         if ((*t.ploton & 0377) && (esc || lead)) {
 523                 oputs(t.ploton);
 524                 esc /= t.Hor;
 525                 lead /= t.Vert;
 526                 while (esc--)
 527                         oputs(p);
 528                 while (lead--)
 529                         oputs(q);
 530                 oputs(t.plotoff);
 531         }
 532         esc = lead = 0;
 533 }
 534
 535
 536 void n_ptlead(void)
 537 {
 538         move();
 539 }
 540
 541
 542 void n_ptpause(void )
 543 {
 544         char    junk;
 545
 546         flusho();
 547         read(2, &junk, 1);
 548 }