man_html.c

   1 /*      $Id: man_html.c,v 1.133 2017/02/05 18:15:39 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2013, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #include "config.h"
  19
  20 #include <sys/types.h>
  21
  22 #include <assert.h>
  23 #include <ctype.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include "mandoc_aux.h"
  29 #include "roff.h"
  30 #include "man.h"
  31 #include "out.h"
  32 #include "html.h"
  33 #include "main.h"
  34
  35 /* FIXME: have PD set the default vspace width. */
  36
  37 #define INDENT            5
  38
  39 #define MAN_ARGS          const struct roff_meta *man, \
  40                           const struct roff_node *n, \
  41                           struct html *h
  42
  43 struct  htmlman {
  44         int             (*pre)(MAN_ARGS);
  45         int             (*post)(MAN_ARGS);
  46 };
  47
  48 static  void              print_bvspace(struct html *,
  49                                 const struct roff_node *);
  50 static  void              print_man_head(MAN_ARGS);
  51 static  void              print_man_nodelist(MAN_ARGS);
  52 static  void              print_man_node(MAN_ARGS);
  53 static  int               fillmode(struct html *, int);
  54 static  int               a2width(const struct roff_node *,
  55                                 struct roffsu *);
  56 static  int               man_B_pre(MAN_ARGS);
  57 static  int               man_HP_pre(MAN_ARGS);
  58 static  int               man_IP_pre(MAN_ARGS);
  59 static  int               man_I_pre(MAN_ARGS);
  60 static  int               man_OP_pre(MAN_ARGS);
  61 static  int               man_PP_pre(MAN_ARGS);
  62 static  int               man_RS_pre(MAN_ARGS);
  63 static  int               man_SH_pre(MAN_ARGS);
  64 static  int               man_SM_pre(MAN_ARGS);
  65 static  int               man_SS_pre(MAN_ARGS);
  66 static  int               man_UR_pre(MAN_ARGS);
  67 static  int               man_alt_pre(MAN_ARGS);
  68 static  int               man_br_pre(MAN_ARGS);
  69 static  int               man_ign_pre(MAN_ARGS);
  70 static  int               man_in_pre(MAN_ARGS);
  71 static  void              man_root_post(MAN_ARGS);
  72 static  void              man_root_pre(MAN_ARGS);
  73
  74 static  const struct htmlman mans[MAN_MAX] = {
  75         { man_br_pre, NULL }, /* br */
  76         { NULL, NULL }, /* TH */
  77         { man_SH_pre, NULL }, /* SH */
  78         { man_SS_pre, NULL }, /* SS */
  79         { man_IP_pre, NULL }, /* TP */
  80         { man_PP_pre, NULL }, /* LP */
  81         { man_PP_pre, NULL }, /* PP */
  82         { man_PP_pre, NULL }, /* P */
  83         { man_IP_pre, NULL }, /* IP */
  84         { man_HP_pre, NULL }, /* HP */
  85         { man_SM_pre, NULL }, /* SM */
  86         { man_SM_pre, NULL }, /* SB */
  87         { man_alt_pre, NULL }, /* BI */
  88         { man_alt_pre, NULL }, /* IB */
  89         { man_alt_pre, NULL }, /* BR */
  90         { man_alt_pre, NULL }, /* RB */
  91         { NULL, NULL }, /* R */
  92         { man_B_pre, NULL }, /* B */
  93         { man_I_pre, NULL }, /* I */
  94         { man_alt_pre, NULL }, /* IR */
  95         { man_alt_pre, NULL }, /* RI */
  96         { man_br_pre, NULL }, /* sp */
  97         { NULL, NULL }, /* nf */
  98         { NULL, NULL }, /* fi */
  99         { NULL, NULL }, /* RE */
 100         { man_RS_pre, NULL }, /* RS */
 101         { man_ign_pre, NULL }, /* DT */
 102         { man_ign_pre, NULL }, /* UC */
 103         { man_ign_pre, NULL }, /* PD */
 104         { man_ign_pre, NULL }, /* AT */
 105         { man_in_pre, NULL }, /* in */
 106         { man_ign_pre, NULL }, /* ft */
 107         { man_OP_pre, NULL }, /* OP */
 108         { NULL, NULL }, /* EX */
 109         { NULL, NULL }, /* EE */
 110         { man_UR_pre, NULL }, /* UR */
 111         { NULL, NULL }, /* UE */
 112         { man_ign_pre, NULL }, /* ll */
 113 };
 114
 115
 116 /*
 117  * Printing leading vertical space before a block.
 118  * This is used for the paragraph macros.
 119  * The rules are pretty simple, since there's very little nesting going
 120  * on here.  Basically, if we're the first within another block (SS/SH),
 121  * then don't emit vertical space.  If we are (RS), then do.  If not the
 122  * first, print it.
 123  */
 124 static void
 125 print_bvspace(struct html *h, const struct roff_node *n)
 126 {
 127
 128         if (n->body && n->body->child)
 129                 if (n->body->child->type == ROFFT_TBL)
 130                         return;
 131
 132         if (n->parent->type == ROFFT_ROOT || n->parent->tok != MAN_RS)
 133                 if (NULL == n->prev)
 134                         return;
 135
 136         print_paragraph(h);
 137 }
 138
 139 void
 140 html_man(void *arg, const struct roff_man *man)
 141 {
 142         struct html     *h;
 143         struct tag      *t;
 144
 145         h = (struct html *)arg;
 146
 147         if ((h->oflags & HTML_FRAGMENT) == 0) {
 148                 print_gen_decls(h);
 149                 print_otag(h, TAG_HTML, "");
 150                 t = print_otag(h, TAG_HEAD, "");
 151                 print_man_head(&man->meta, man->first, h);
 152                 print_tagq(h, t);
 153                 print_otag(h, TAG_BODY, "");
 154         }
 155
 156         man_root_pre(&man->meta, man->first, h);
 157         t = print_otag(h, TAG_DIV, "c", "manual-text");
 158         print_man_nodelist(&man->meta, man->first->child, h);
 159         print_tagq(h, t);
 160         man_root_post(&man->meta, man->first, h);
 161         print_tagq(h, NULL);
 162 }
 163
 164 static void
 165 print_man_head(MAN_ARGS)
 166 {
 167         char    *cp;
 168
 169         print_gen_head(h);
 170         mandoc_asprintf(&cp, "%s(%s)", man->title, man->msec);
 171         print_otag(h, TAG_TITLE, "");
 172         print_text(h, cp);
 173         free(cp);
 174 }
 175
 176 static void
 177 print_man_nodelist(MAN_ARGS)
 178 {
 179
 180         while (n != NULL) {
 181                 print_man_node(man, n, h);
 182                 n = n->next;
 183         }
 184 }
 185
 186 static void
 187 print_man_node(MAN_ARGS)
 188 {
 189         static int       want_fillmode = MAN_fi;
 190         static int       save_fillmode;
 191
 192         struct tag      *t;
 193         int              child;
 194
 195         /*
 196          * Handle fill mode switch requests up front,
 197          * they would just cause trouble in the subsequent code.
 198          */
 199
 200         switch (n->tok) {
 201         case MAN_nf:
 202         case MAN_EX:
 203                 want_fillmode = MAN_nf;
 204                 return;
 205         case MAN_fi:
 206         case MAN_EE:
 207                 want_fillmode = MAN_fi;
 208                 if (fillmode(h, 0) == MAN_fi)
 209                         print_otag(h, TAG_BR, "");
 210                 return;
 211         default:
 212                 break;
 213         }
 214
 215         /* Set up fill mode for the upcoming node. */
 216
 217         switch (n->type) {
 218         case ROFFT_BLOCK:
 219                 save_fillmode = 0;
 220                 /* Some block macros suspend or cancel .nf. */
 221                 switch (n->tok) {
 222                 case MAN_TP:  /* Tagged paragraphs              */
 223                 case MAN_IP:  /* temporarily disable .nf        */
 224                 case MAN_HP:  /* for the head.                  */
 225                         save_fillmode = want_fillmode;
 226                         /* FALLTHROUGH */
 227                 case MAN_SH:  /* Section headers                */
 228                 case MAN_SS:  /* permanently cancel .nf.        */
 229                         want_fillmode = MAN_fi;
 230                         /* FALLTHROUGH */
 231                 case MAN_PP:  /* These have no head.            */
 232                 case MAN_LP:  /* They will simply               */
 233                 case MAN_P:   /* reopen .nf in the body.        */
 234                 case MAN_RS:
 235                 case MAN_UR:
 236                         fillmode(h, MAN_fi);
 237                         break;
 238                 default:
 239                         break;
 240                 }
 241                 break;
 242         case ROFFT_TBL:
 243                 fillmode(h, MAN_fi);
 244                 break;
 245         case ROFFT_ELEM:
 246                 /*
 247                  * Some in-line macros produce tags and/or text
 248                  * in the handler, so they require fill mode to be
 249                  * configured up front just like for text nodes.
 250                  * For the others, keep the traditional approach
 251                  * of doing the same, for now.
 252                  */
 253                 fillmode(h, want_fillmode);
 254                 break;
 255         case ROFFT_TEXT:
 256                 if (fillmode(h, want_fillmode) == MAN_fi &&
 257                     want_fillmode == MAN_fi &&
 258                     n->flags & NODE_LINE && *n->string == ' ')
 259                         print_otag(h, TAG_BR, "");
 260                 if (*n->string != '\0')
 261                         break;
 262                 print_paragraph(h);
 263                 return;
 264         default:
 265                 break;
 266         }
 267
 268         /* Produce output for this node. */
 269
 270         child = 1;
 271         switch (n->type) {
 272         case ROFFT_TEXT:
 273                 t = h->tag;
 274                 print_text(h, n->string);
 275                 break;
 276         case ROFFT_EQN:
 277                 t = h->tag;
 278                 print_eqn(h, n->eqn);
 279                 break;
 280         case ROFFT_TBL:
 281                 /*
 282                  * This will take care of initialising all of the table
 283                  * state data for the first table, then tearing it down
 284                  * for the last one.
 285                  */
 286                 print_tbl(h, n->span);
 287                 return;
 288         default:
 289                 /*
 290                  * Close out scope of font prior to opening a macro
 291                  * scope.
 292                  */
 293                 if (HTMLFONT_NONE != h->metac) {
 294                         h->metal = h->metac;
 295                         h->metac = HTMLFONT_NONE;
 296                 }
 297
 298                 /*
 299                  * Close out the current table, if it's open, and unset
 300                  * the "meta" table state.  This will be reopened on the
 301                  * next table element.
 302                  */
 303                 if (h->tblt)
 304                         print_tblclose(h);
 305
 306                 t = h->tag;
 307                 if (mans[n->tok].pre)
 308                         child = (*mans[n->tok].pre)(man, n, h);
 309
 310                 /* Some block macros resume .nf in the body. */
 311                 if (save_fillmode && n->type == ROFFT_BODY)
 312                         want_fillmode = save_fillmode;
 313
 314                 break;
 315         }
 316
 317         if (child && n->child)
 318                 print_man_nodelist(man, n->child, h);
 319
 320         /* This will automatically close out any font scope. */
 321         print_stagq(h, t);
 322
 323         if (fillmode(h, 0) == MAN_nf &&
 324             n->next != NULL && n->next->flags & NODE_LINE)
 325                 print_endline(h);
 326 }
 327
 328 /*
 329  * MAN_nf switches to no-fill mode, MAN_fi to fill mode.
 330  * Other arguments do not switch.
 331  * The old mode is returned.
 332  */
 333 static int
 334 fillmode(struct html *h, int want)
 335 {
 336         struct tag      *pre;
 337         int              had;
 338
 339         for (pre = h->tag; pre != NULL; pre = pre->next)
 340                 if (pre->tag == TAG_PRE)
 341                         break;
 342
 343         had = pre == NULL ? MAN_fi : MAN_nf;
 344
 345         if (want && want != had) {
 346                 if (want == MAN_nf)
 347                         print_otag(h, TAG_PRE, "");
 348                 else
 349                         print_tagq(h, pre);
 350         }
 351         return had;
 352 }
 353
 354 static int
 355 a2width(const struct roff_node *n, struct roffsu *su)
 356 {
 357
 358         if (n->type != ROFFT_TEXT)
 359                 return 0;
 360         if (a2roffsu(n->string, su, SCALE_EN))
 361                 return 1;
 362
 363         return 0;
 364 }
 365
 366 static void
 367 man_root_pre(MAN_ARGS)
 368 {
 369         struct tag      *t, *tt;
 370         char            *title;
 371
 372         assert(man->title);
 373         assert(man->msec);
 374         mandoc_asprintf(&title, "%s(%s)", man->title, man->msec);
 375
 376         t = print_otag(h, TAG_TABLE, "c", "head");
 377         tt = print_otag(h, TAG_TR, "");
 378
 379         print_otag(h, TAG_TD, "c", "head-ltitle");
 380         print_text(h, title);
 381         print_stagq(h, tt);
 382
 383         print_otag(h, TAG_TD, "c", "head-vol");
 384         if (NULL != man->vol)
 385                 print_text(h, man->vol);
 386         print_stagq(h, tt);
 387
 388         print_otag(h, TAG_TD, "c", "head-rtitle");
 389         print_text(h, title);
 390         print_tagq(h, t);
 391         free(title);
 392 }
 393
 394 static void
 395 man_root_post(MAN_ARGS)
 396 {
 397         struct tag      *t, *tt;
 398
 399         t = print_otag(h, TAG_TABLE, "c", "foot");
 400         tt = print_otag(h, TAG_TR, "");
 401
 402         print_otag(h, TAG_TD, "c", "foot-date");
 403         print_text(h, man->date);
 404         print_stagq(h, tt);
 405
 406         print_otag(h, TAG_TD, "c", "foot-os");
 407         if (man->os)
 408                 print_text(h, man->os);
 409         print_tagq(h, t);
 410 }
 411
 412
 413 static int
 414 man_br_pre(MAN_ARGS)
 415 {
 416         struct roffsu    su;
 417
 418         SCALE_VS_INIT(&su, 1);
 419
 420         if (MAN_sp == n->tok) {
 421                 if (NULL != (n = n->child))
 422                         if ( ! a2roffsu(n->string, &su, SCALE_VS))
 423                                 su.scale = 1.0;
 424         } else
 425                 su.scale = 0.0;
 426
 427         print_otag(h, TAG_DIV, "suh", &su);
 428
 429         /* So the div isn't empty: */
 430         print_text(h, "\\~");
 431
 432         return 0;
 433 }
 434
 435 static int
 436 man_SH_pre(MAN_ARGS)
 437 {
 438         if (n->type == ROFFT_HEAD)
 439                 print_otag(h, TAG_H1, "c", "Sh");
 440         return 1;
 441 }
 442
 443 static int
 444 man_alt_pre(MAN_ARGS)
 445 {
 446         const struct roff_node  *nn;
 447         int              i;
 448         enum htmltag     fp;
 449         struct tag      *t;
 450
 451         for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
 452                 switch (n->tok) {
 453                 case MAN_BI:
 454                         fp = i % 2 ? TAG_I : TAG_B;
 455                         break;
 456                 case MAN_IB:
 457                         fp = i % 2 ? TAG_B : TAG_I;
 458                         break;
 459                 case MAN_RI:
 460                         fp = i % 2 ? TAG_I : TAG_MAX;
 461                         break;
 462                 case MAN_IR:
 463                         fp = i % 2 ? TAG_MAX : TAG_I;
 464                         break;
 465                 case MAN_BR:
 466                         fp = i % 2 ? TAG_MAX : TAG_B;
 467                         break;
 468                 case MAN_RB:
 469                         fp = i % 2 ? TAG_B : TAG_MAX;
 470                         break;
 471                 default:
 472                         abort();
 473                 }
 474
 475                 if (i)
 476                         h->flags |= HTML_NOSPACE;
 477
 478                 if (fp != TAG_MAX)
 479                         t = print_otag(h, fp, "");
 480
 481                 print_text(h, nn->string);
 482
 483                 if (fp != TAG_MAX)
 484                         print_tagq(h, t);
 485         }
 486         return 0;
 487 }
 488
 489 static int
 490 man_SM_pre(MAN_ARGS)
 491 {
 492         print_otag(h, TAG_SMALL, "");
 493         if (MAN_SB == n->tok)
 494                 print_otag(h, TAG_B, "");
 495         return 1;
 496 }
 497
 498 static int
 499 man_SS_pre(MAN_ARGS)
 500 {
 501         if (n->type == ROFFT_HEAD)
 502                 print_otag(h, TAG_H2, "c", "Ss");
 503         return 1;
 504 }
 505
 506 static int
 507 man_PP_pre(MAN_ARGS)
 508 {
 509
 510         if (n->type == ROFFT_HEAD)
 511                 return 0;
 512         else if (n->type == ROFFT_BLOCK)
 513                 print_bvspace(h, n);
 514
 515         return 1;
 516 }
 517
 518 static int
 519 man_IP_pre(MAN_ARGS)
 520 {
 521         const struct roff_node  *nn;
 522
 523         if (n->type == ROFFT_BODY) {
 524                 print_otag(h, TAG_DD, "c", "It-tag");
 525                 return 1;
 526         } else if (n->type != ROFFT_HEAD) {
 527                 print_otag(h, TAG_DL, "c", "Bl-tag");
 528                 return 1;
 529         }
 530
 531         /* FIXME: width specification. */
 532
 533         print_otag(h, TAG_DT, "c", "It-tag");
 534
 535         /* For IP, only print the first header element. */
 536
 537         if (MAN_IP == n->tok && n->child)
 538                 print_man_node(man, n->child, h);
 539
 540         /* For TP, only print next-line header elements. */
 541
 542         if (MAN_TP == n->tok) {
 543                 nn = n->child;
 544                 while (NULL != nn && 0 == (NODE_LINE & nn->flags))
 545                         nn = nn->next;
 546                 while (NULL != nn) {
 547                         print_man_node(man, nn, h);
 548                         nn = nn->next;
 549                 }
 550         }
 551
 552         return 0;
 553 }
 554
 555 static int
 556 man_HP_pre(MAN_ARGS)
 557 {
 558         struct roffsu    sum, sui;
 559         const struct roff_node *np;
 560
 561         if (n->type == ROFFT_HEAD)
 562                 return 0;
 563         else if (n->type != ROFFT_BLOCK)
 564                 return 1;
 565
 566         np = n->head->child;
 567
 568         if (np == NULL || !a2width(np, &sum))
 569                 SCALE_HS_INIT(&sum, INDENT);
 570
 571         sui.unit = sum.unit;
 572         sui.scale = -sum.scale;
 573
 574         print_bvspace(h, n);
 575         print_otag(h, TAG_DIV, "csului", "Pp", &sum, &sui);
 576         return 1;
 577 }
 578
 579 static int
 580 man_OP_pre(MAN_ARGS)
 581 {
 582         struct tag      *tt;
 583
 584         print_text(h, "[");
 585         h->flags |= HTML_NOSPACE;
 586         tt = print_otag(h, TAG_SPAN, "c", "Op");
 587
 588         if (NULL != (n = n->child)) {
 589                 print_otag(h, TAG_B, "");
 590                 print_text(h, n->string);
 591         }
 592
 593         print_stagq(h, tt);
 594
 595         if (NULL != n && NULL != n->next) {
 596                 print_otag(h, TAG_I, "");
 597                 print_text(h, n->next->string);
 598         }
 599
 600         print_stagq(h, tt);
 601         h->flags |= HTML_NOSPACE;
 602         print_text(h, "]");
 603         return 0;
 604 }
 605
 606 static int
 607 man_B_pre(MAN_ARGS)
 608 {
 609         print_otag(h, TAG_B, "");
 610         return 1;
 611 }
 612
 613 static int
 614 man_I_pre(MAN_ARGS)
 615 {
 616         print_otag(h, TAG_I, "");
 617         return 1;
 618 }
 619
 620 static int
 621 man_in_pre(MAN_ARGS)
 622 {
 623         print_otag(h, TAG_BR, "");
 624         return 0;
 625 }
 626
 627 static int
 628 man_ign_pre(MAN_ARGS)
 629 {
 630
 631         return 0;
 632 }
 633
 634 static int
 635 man_RS_pre(MAN_ARGS)
 636 {
 637         struct roffsu    su;
 638
 639         if (n->type == ROFFT_HEAD)
 640                 return 0;
 641         else if (n->type == ROFFT_BODY)
 642                 return 1;
 643
 644         SCALE_HS_INIT(&su, INDENT);
 645         if (n->head->child)
 646                 a2width(n->head->child, &su);
 647
 648         print_otag(h, TAG_DIV, "sul", &su);
 649         return 1;
 650 }
 651
 652 static int
 653 man_UR_pre(MAN_ARGS)
 654 {
 655         n = n->child;
 656         assert(n->type == ROFFT_HEAD);
 657         if (n->child != NULL) {
 658                 assert(n->child->type == ROFFT_TEXT);
 659                 print_otag(h, TAG_A, "ch", "Lk", n->child->string);
 660         }
 661
 662         assert(n->next->type == ROFFT_BODY);
 663         if (n->next->child != NULL)
 664                 n = n->next;
 665
 666         print_man_nodelist(man, n->child, h);
 667
 668         return 0;
 669 }