man_html.c

   1 /*      $Id: man_html.c,v 1.143 2017/06/08 12:54:58 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_ign_pre(MAN_ARGS);
  69 static  int               man_in_pre(MAN_ARGS);
  70 static  void              man_root_post(MAN_ARGS);
  71 static  void              man_root_pre(MAN_ARGS);
  72
  73 static  const struct htmlman __mans[MAN_MAX - MAN_TH] = {
  74         { NULL, NULL }, /* TH */
  75         { man_SH_pre, NULL }, /* SH */
  76         { man_SS_pre, NULL }, /* SS */
  77         { man_IP_pre, NULL }, /* TP */
  78         { man_PP_pre, NULL }, /* LP */
  79         { man_PP_pre, NULL }, /* PP */
  80         { man_PP_pre, NULL }, /* P */
  81         { man_IP_pre, NULL }, /* IP */
  82         { man_HP_pre, NULL }, /* HP */
  83         { man_SM_pre, NULL }, /* SM */
  84         { man_SM_pre, NULL }, /* SB */
  85         { man_alt_pre, NULL }, /* BI */
  86         { man_alt_pre, NULL }, /* IB */
  87         { man_alt_pre, NULL }, /* BR */
  88         { man_alt_pre, NULL }, /* RB */
  89         { NULL, NULL }, /* R */
  90         { man_B_pre, NULL }, /* B */
  91         { man_I_pre, NULL }, /* I */
  92         { man_alt_pre, NULL }, /* IR */
  93         { man_alt_pre, NULL }, /* RI */
  94         { NULL, NULL }, /* nf */
  95         { NULL, NULL }, /* fi */
  96         { NULL, NULL }, /* RE */
  97         { man_RS_pre, NULL }, /* RS */
  98         { man_ign_pre, NULL }, /* DT */
  99         { man_ign_pre, NULL }, /* UC */
 100         { man_ign_pre, NULL }, /* PD */
 101         { man_ign_pre, NULL }, /* AT */
 102         { man_in_pre, NULL }, /* in */
 103         { man_OP_pre, NULL }, /* OP */
 104         { NULL, NULL }, /* EX */
 105         { NULL, NULL }, /* EE */
 106         { man_UR_pre, NULL }, /* UR */
 107         { NULL, NULL }, /* UE */
 108 };
 109 static  const struct htmlman *const mans = __mans - MAN_TH;
 110
 111
 112 /*
 113  * Printing leading vertical space before a block.
 114  * This is used for the paragraph macros.
 115  * The rules are pretty simple, since there's very little nesting going
 116  * on here.  Basically, if we're the first within another block (SS/SH),
 117  * then don't emit vertical space.  If we are (RS), then do.  If not the
 118  * first, print it.
 119  */
 120 static void
 121 print_bvspace(struct html *h, const struct roff_node *n)
 122 {
 123
 124         if (n->body && n->body->child)
 125                 if (n->body->child->type == ROFFT_TBL)
 126                         return;
 127
 128         if (n->parent->type == ROFFT_ROOT || n->parent->tok != MAN_RS)
 129                 if (NULL == n->prev)
 130                         return;
 131
 132         print_paragraph(h);
 133 }
 134
 135 void
 136 html_man(void *arg, const struct roff_man *man)
 137 {
 138         struct html     *h;
 139         struct tag      *t;
 140
 141         h = (struct html *)arg;
 142
 143         if ((h->oflags & HTML_FRAGMENT) == 0) {
 144                 print_gen_decls(h);
 145                 print_otag(h, TAG_HTML, "");
 146                 t = print_otag(h, TAG_HEAD, "");
 147                 print_man_head(&man->meta, man->first, h);
 148                 print_tagq(h, t);
 149                 print_otag(h, TAG_BODY, "");
 150         }
 151
 152         man_root_pre(&man->meta, man->first, h);
 153         t = print_otag(h, TAG_DIV, "c", "manual-text");
 154         print_man_nodelist(&man->meta, man->first->child, h);
 155         print_tagq(h, t);
 156         man_root_post(&man->meta, man->first, h);
 157         print_tagq(h, NULL);
 158 }
 159
 160 static void
 161 print_man_head(MAN_ARGS)
 162 {
 163         char    *cp;
 164
 165         print_gen_head(h);
 166         mandoc_asprintf(&cp, "%s(%s)", man->title, man->msec);
 167         print_otag(h, TAG_TITLE, "");
 168         print_text(h, cp);
 169         free(cp);
 170 }
 171
 172 static void
 173 print_man_nodelist(MAN_ARGS)
 174 {
 175
 176         while (n != NULL) {
 177                 print_man_node(man, n, h);
 178                 n = n->next;
 179         }
 180 }
 181
 182 static void
 183 print_man_node(MAN_ARGS)
 184 {
 185         static int       want_fillmode = MAN_fi;
 186         static int       save_fillmode;
 187
 188         struct tag      *t;
 189         int              child;
 190
 191         /*
 192          * Handle fill mode switch requests up front,
 193          * they would just cause trouble in the subsequent code.
 194          */
 195
 196         switch (n->tok) {
 197         case MAN_nf:
 198         case MAN_EX:
 199                 want_fillmode = MAN_nf;
 200                 return;
 201         case MAN_fi:
 202         case MAN_EE:
 203                 want_fillmode = MAN_fi;
 204                 if (fillmode(h, 0) == MAN_fi)
 205                         print_otag(h, TAG_BR, "");
 206                 return;
 207         default:
 208                 break;
 209         }
 210
 211         /* Set up fill mode for the upcoming node. */
 212
 213         switch (n->type) {
 214         case ROFFT_BLOCK:
 215                 save_fillmode = 0;
 216                 /* Some block macros suspend or cancel .nf. */
 217                 switch (n->tok) {
 218                 case MAN_TP:  /* Tagged paragraphs              */
 219                 case MAN_IP:  /* temporarily disable .nf        */
 220                 case MAN_HP:  /* for the head.                  */
 221                         save_fillmode = want_fillmode;
 222                         /* FALLTHROUGH */
 223                 case MAN_SH:  /* Section headers                */
 224                 case MAN_SS:  /* permanently cancel .nf.        */
 225                         want_fillmode = MAN_fi;
 226                         /* FALLTHROUGH */
 227                 case MAN_PP:  /* These have no head.            */
 228                 case MAN_LP:  /* They will simply               */
 229                 case MAN_P:   /* reopen .nf in the body.        */
 230                 case MAN_RS:
 231                 case MAN_UR:
 232                         fillmode(h, MAN_fi);
 233                         break;
 234                 default:
 235                         break;
 236                 }
 237                 break;
 238         case ROFFT_TBL:
 239                 fillmode(h, MAN_fi);
 240                 break;
 241         case ROFFT_ELEM:
 242                 /*
 243                  * Some in-line macros produce tags and/or text
 244                  * in the handler, so they require fill mode to be
 245                  * configured up front just like for text nodes.
 246                  * For the others, keep the traditional approach
 247                  * of doing the same, for now.
 248                  */
 249                 fillmode(h, want_fillmode);
 250                 break;
 251         case ROFFT_TEXT:
 252                 if (fillmode(h, want_fillmode) == MAN_fi &&
 253                     want_fillmode == MAN_fi &&
 254                     n->flags & NODE_LINE && *n->string == ' ' &&
 255                     (h->flags & HTML_NONEWLINE) == 0)
 256                         print_otag(h, TAG_BR, "");
 257                 if (*n->string != '\0')
 258                         break;
 259                 print_paragraph(h);
 260                 return;
 261         default:
 262                 break;
 263         }
 264
 265         /* Produce output for this node. */
 266
 267         child = 1;
 268         switch (n->type) {
 269         case ROFFT_TEXT:
 270                 t = h->tag;
 271                 print_text(h, n->string);
 272                 break;
 273         case ROFFT_EQN:
 274                 t = h->tag;
 275                 print_eqn(h, n->eqn);
 276                 break;
 277         case ROFFT_TBL:
 278                 /*
 279                  * This will take care of initialising all of the table
 280                  * state data for the first table, then tearing it down
 281                  * for the last one.
 282                  */
 283                 print_tbl(h, n->span);
 284                 return;
 285         default:
 286                 /*
 287                  * Close out scope of font prior to opening a macro
 288                  * scope.
 289                  */
 290                 if (HTMLFONT_NONE != h->metac) {
 291                         h->metal = h->metac;
 292                         h->metac = HTMLFONT_NONE;
 293                 }
 294
 295                 /*
 296                  * Close out the current table, if it's open, and unset
 297                  * the "meta" table state.  This will be reopened on the
 298                  * next table element.
 299                  */
 300                 if (h->tblt)
 301                         print_tblclose(h);
 302
 303                 t = h->tag;
 304                 if (n->tok < ROFF_MAX) {
 305                         roff_html_pre(h, n);
 306                         child = 0;
 307                         break;
 308                 }
 309
 310                 assert(n->tok >= MAN_TH && n->tok < MAN_MAX);
 311                 if (mans[n->tok].pre)
 312                         child = (*mans[n->tok].pre)(man, n, h);
 313
 314                 /* Some block macros resume .nf in the body. */
 315                 if (save_fillmode && n->type == ROFFT_BODY)
 316                         want_fillmode = save_fillmode;
 317
 318                 break;
 319         }
 320
 321         if (child && n->child)
 322                 print_man_nodelist(man, n->child, h);
 323
 324         /* This will automatically close out any font scope. */
 325         print_stagq(h, t);
 326
 327         if (fillmode(h, 0) == MAN_nf &&
 328             n->next != NULL && n->next->flags & NODE_LINE)
 329                 print_endline(h);
 330 }
 331
 332 /*
 333  * MAN_nf switches to no-fill mode, MAN_fi to fill mode.
 334  * Other arguments do not switch.
 335  * The old mode is returned.
 336  */
 337 static int
 338 fillmode(struct html *h, int want)
 339 {
 340         struct tag      *pre;
 341         int              had;
 342
 343         for (pre = h->tag; pre != NULL; pre = pre->next)
 344                 if (pre->tag == TAG_PRE)
 345                         break;
 346
 347         had = pre == NULL ? MAN_fi : MAN_nf;
 348
 349         if (want && want != had) {
 350                 if (want == MAN_nf)
 351                         print_otag(h, TAG_PRE, "");
 352                 else
 353                         print_tagq(h, pre);
 354         }
 355         return had;
 356 }
 357
 358 static int
 359 a2width(const struct roff_node *n, struct roffsu *su)
 360 {
 361         if (n->type != ROFFT_TEXT)
 362                 return 0;
 363         return a2roffsu(n->string, su, SCALE_EN) != NULL;
 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 static int
 413 man_SH_pre(MAN_ARGS)
 414 {
 415         char    *id;
 416
 417         if (n->type == ROFFT_HEAD) {
 418                 id = html_make_id(n);
 419                 print_otag(h, TAG_H1, "cTi", "Sh", id);
 420                 if (id != NULL)
 421                         print_otag(h, TAG_A, "chR", "selflink", id);
 422                 free(id);
 423         }
 424         return 1;
 425 }
 426
 427 static int
 428 man_alt_pre(MAN_ARGS)
 429 {
 430         const struct roff_node  *nn;
 431         int              i;
 432         enum htmltag     fp;
 433         struct tag      *t;
 434
 435         for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
 436                 switch (n->tok) {
 437                 case MAN_BI:
 438                         fp = i % 2 ? TAG_I : TAG_B;
 439                         break;
 440                 case MAN_IB:
 441                         fp = i % 2 ? TAG_B : TAG_I;
 442                         break;
 443                 case MAN_RI:
 444                         fp = i % 2 ? TAG_I : TAG_MAX;
 445                         break;
 446                 case MAN_IR:
 447                         fp = i % 2 ? TAG_MAX : TAG_I;
 448                         break;
 449                 case MAN_BR:
 450                         fp = i % 2 ? TAG_MAX : TAG_B;
 451                         break;
 452                 case MAN_RB:
 453                         fp = i % 2 ? TAG_B : TAG_MAX;
 454                         break;
 455                 default:
 456                         abort();
 457                 }
 458
 459                 if (i)
 460                         h->flags |= HTML_NOSPACE;
 461
 462                 if (fp != TAG_MAX)
 463                         t = print_otag(h, fp, "");
 464
 465                 print_text(h, nn->string);
 466
 467                 if (fp != TAG_MAX)
 468                         print_tagq(h, t);
 469         }
 470         return 0;
 471 }
 472
 473 static int
 474 man_SM_pre(MAN_ARGS)
 475 {
 476         print_otag(h, TAG_SMALL, "");
 477         if (MAN_SB == n->tok)
 478                 print_otag(h, TAG_B, "");
 479         return 1;
 480 }
 481
 482 static int
 483 man_SS_pre(MAN_ARGS)
 484 {
 485         char    *id;
 486
 487         if (n->type == ROFFT_HEAD) {
 488                 id = html_make_id(n);
 489                 print_otag(h, TAG_H2, "cTi", "Ss", id);
 490                 if (id != NULL)
 491                         print_otag(h, TAG_A, "chR", "selflink", id);
 492                 free(id);
 493         }
 494         return 1;
 495 }
 496
 497 static int
 498 man_PP_pre(MAN_ARGS)
 499 {
 500
 501         if (n->type == ROFFT_HEAD)
 502                 return 0;
 503         else if (n->type == ROFFT_BLOCK)
 504                 print_bvspace(h, n);
 505
 506         return 1;
 507 }
 508
 509 static int
 510 man_IP_pre(MAN_ARGS)
 511 {
 512         const struct roff_node  *nn;
 513
 514         if (n->type == ROFFT_BODY) {
 515                 print_otag(h, TAG_DD, "c", "It-tag");
 516                 return 1;
 517         } else if (n->type != ROFFT_HEAD) {
 518                 print_otag(h, TAG_DL, "c", "Bl-tag");
 519                 return 1;
 520         }
 521
 522         /* FIXME: width specification. */
 523
 524         print_otag(h, TAG_DT, "c", "It-tag");
 525
 526         /* For IP, only print the first header element. */
 527
 528         if (MAN_IP == n->tok && n->child)
 529                 print_man_node(man, n->child, h);
 530
 531         /* For TP, only print next-line header elements. */
 532
 533         if (MAN_TP == n->tok) {
 534                 nn = n->child;
 535                 while (NULL != nn && 0 == (NODE_LINE & nn->flags))
 536                         nn = nn->next;
 537                 while (NULL != nn) {
 538                         print_man_node(man, nn, h);
 539                         nn = nn->next;
 540                 }
 541         }
 542
 543         return 0;
 544 }
 545
 546 static int
 547 man_HP_pre(MAN_ARGS)
 548 {
 549         struct roffsu    sum, sui;
 550         const struct roff_node *np;
 551
 552         if (n->type == ROFFT_HEAD)
 553                 return 0;
 554         else if (n->type != ROFFT_BLOCK)
 555                 return 1;
 556
 557         np = n->head->child;
 558
 559         if (np == NULL || !a2width(np, &sum))
 560                 SCALE_HS_INIT(&sum, INDENT);
 561
 562         sui.unit = sum.unit;
 563         sui.scale = -sum.scale;
 564
 565         print_bvspace(h, n);
 566         print_otag(h, TAG_DIV, "csului", "Pp", &sum, &sui);
 567         return 1;
 568 }
 569
 570 static int
 571 man_OP_pre(MAN_ARGS)
 572 {
 573         struct tag      *tt;
 574
 575         print_text(h, "[");
 576         h->flags |= HTML_NOSPACE;
 577         tt = print_otag(h, TAG_SPAN, "c", "Op");
 578
 579         if (NULL != (n = n->child)) {
 580                 print_otag(h, TAG_B, "");
 581                 print_text(h, n->string);
 582         }
 583
 584         print_stagq(h, tt);
 585
 586         if (NULL != n && NULL != n->next) {
 587                 print_otag(h, TAG_I, "");
 588                 print_text(h, n->next->string);
 589         }
 590
 591         print_stagq(h, tt);
 592         h->flags |= HTML_NOSPACE;
 593         print_text(h, "]");
 594         return 0;
 595 }
 596
 597 static int
 598 man_B_pre(MAN_ARGS)
 599 {
 600         print_otag(h, TAG_B, "");
 601         return 1;
 602 }
 603
 604 static int
 605 man_I_pre(MAN_ARGS)
 606 {
 607         print_otag(h, TAG_I, "");
 608         return 1;
 609 }
 610
 611 static int
 612 man_in_pre(MAN_ARGS)
 613 {
 614         print_otag(h, TAG_BR, "");
 615         return 0;
 616 }
 617
 618 static int
 619 man_ign_pre(MAN_ARGS)
 620 {
 621
 622         return 0;
 623 }
 624
 625 static int
 626 man_RS_pre(MAN_ARGS)
 627 {
 628         struct roffsu    su;
 629
 630         if (n->type == ROFFT_HEAD)
 631                 return 0;
 632         else if (n->type == ROFFT_BODY)
 633                 return 1;
 634
 635         SCALE_HS_INIT(&su, INDENT);
 636         if (n->head->child)
 637                 a2width(n->head->child, &su);
 638
 639         print_otag(h, TAG_DIV, "sul", &su);
 640         return 1;
 641 }
 642
 643 static int
 644 man_UR_pre(MAN_ARGS)
 645 {
 646         n = n->child;
 647         assert(n->type == ROFFT_HEAD);
 648         if (n->child != NULL) {
 649                 assert(n->child->type == ROFFT_TEXT);
 650                 print_otag(h, TAG_A, "cTh", "Lk", n->child->string);
 651         }
 652
 653         assert(n->next->type == ROFFT_BODY);
 654         if (n->next->child != NULL)
 655                 n = n->next;
 656
 657         print_man_nodelist(man, n->child, h);
 658
 659         return 0;
 660 }