man_html.c

   1 /*      $Id: man_html.c,v 1.70 2011/03/07 01:35:51 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <sys/types.h>
  22
  23 #include <assert.h>
  24 #include <ctype.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "mandoc.h"
  30 #include "out.h"
  31 #include "html.h"
  32 #include "man.h"
  33 #include "main.h"
  34
  35 /* TODO: preserve ident widths. */
  36 /* FIXME: have PD set the default vspace width. */
  37
  38 #define INDENT            5
  39 #define HALFINDENT        3
  40
  41 #define MAN_ARGS          const struct man_meta *m, \
  42                           const struct man_node *n, \
  43                           struct mhtml *mh, \
  44                           struct html *h
  45
  46 struct  mhtml {
  47         int               fl;
  48 #define MANH_LITERAL     (1 << 0) /* literal context */
  49 };
  50
  51 struct  htmlman {
  52         int             (*pre)(MAN_ARGS);
  53         int             (*post)(MAN_ARGS);
  54 };
  55
  56 static  void              print_man(MAN_ARGS);
  57 static  void              print_man_head(MAN_ARGS);
  58 static  void              print_man_nodelist(MAN_ARGS);
  59 static  void              print_man_node(MAN_ARGS);
  60
  61 static  int               a2width(const struct man_node *,
  62                                 struct roffsu *);
  63
  64 static  int               man_alt_pre(MAN_ARGS);
  65 static  int               man_br_pre(MAN_ARGS);
  66 static  int               man_ign_pre(MAN_ARGS);
  67 static  int               man_in_pre(MAN_ARGS);
  68 static  int               man_literal_pre(MAN_ARGS);
  69 static  void              man_root_post(MAN_ARGS);
  70 static  void              man_root_pre(MAN_ARGS);
  71 static  int               man_B_pre(MAN_ARGS);
  72 static  int               man_HP_pre(MAN_ARGS);
  73 static  int               man_I_pre(MAN_ARGS);
  74 static  int               man_IP_pre(MAN_ARGS);
  75 static  int               man_PP_pre(MAN_ARGS);
  76 static  int               man_RS_pre(MAN_ARGS);
  77 static  int               man_SH_pre(MAN_ARGS);
  78 static  int               man_SM_pre(MAN_ARGS);
  79 static  int               man_SS_pre(MAN_ARGS);
  80
  81 static  const struct htmlman mans[MAN_MAX] = {
  82         { man_br_pre, NULL }, /* br */
  83         { NULL, NULL }, /* TH */
  84         { man_SH_pre, NULL }, /* SH */
  85         { man_SS_pre, NULL }, /* SS */
  86         { man_IP_pre, NULL }, /* TP */
  87         { man_PP_pre, NULL }, /* LP */
  88         { man_PP_pre, NULL }, /* PP */
  89         { man_PP_pre, NULL }, /* P */
  90         { man_IP_pre, NULL }, /* IP */
  91         { man_HP_pre, NULL }, /* HP */
  92         { man_SM_pre, NULL }, /* SM */
  93         { man_SM_pre, NULL }, /* SB */
  94         { man_alt_pre, NULL }, /* BI */
  95         { man_alt_pre, NULL }, /* IB */
  96         { man_alt_pre, NULL }, /* BR */
  97         { man_alt_pre, NULL }, /* RB */
  98         { NULL, NULL }, /* R */
  99         { man_B_pre, NULL }, /* B */
 100         { man_I_pre, NULL }, /* I */
 101         { man_alt_pre, NULL }, /* IR */
 102         { man_alt_pre, NULL }, /* RI */
 103         { man_ign_pre, NULL }, /* na */
 104         { man_br_pre, NULL }, /* sp */
 105         { man_literal_pre, NULL }, /* nf */
 106         { man_literal_pre, NULL }, /* fi */
 107         { NULL, NULL }, /* RE */
 108         { man_RS_pre, NULL }, /* RS */
 109         { man_ign_pre, NULL }, /* DT */
 110         { man_ign_pre, NULL }, /* UC */
 111         { man_ign_pre, NULL }, /* PD */
 112         { man_ign_pre, NULL }, /* AT */
 113         { man_in_pre, NULL }, /* in */
 114         { man_ign_pre, NULL }, /* ft */
 115 };
 116
 117
 118 void
 119 html_man(void *arg, const struct man *m)
 120 {
 121         struct html     *h;
 122         struct tag      *t;
 123         struct mhtml     mh;
 124
 125         h = (struct html *)arg;
 126
 127         print_gen_decls(h);
 128
 129         memset(&mh, 0, sizeof(struct mhtml));
 130
 131         t = print_otag(h, TAG_HTML, 0, NULL);
 132         print_man(man_meta(m), man_node(m), &mh, h);
 133         print_tagq(h, t);
 134
 135         printf("\n");
 136 }
 137
 138
 139 static void
 140 print_man(MAN_ARGS)
 141 {
 142         struct tag      *t;
 143
 144         t = print_otag(h, TAG_HEAD, 0, NULL);
 145         print_man_head(m, n, mh, h);
 146         print_tagq(h, t);
 147
 148         t = print_otag(h, TAG_BODY, 0, NULL);
 149         print_man_nodelist(m, n, mh, h);
 150         print_tagq(h, t);
 151 }
 152
 153
 154 /* ARGSUSED */
 155 static void
 156 print_man_head(MAN_ARGS)
 157 {
 158
 159         print_gen_head(h);
 160         bufinit(h);
 161         buffmt(h, "%s(%s)", m->title, m->msec);
 162
 163         print_otag(h, TAG_TITLE, 0, NULL);
 164         print_text(h, h->buf);
 165 }
 166
 167
 168 static void
 169 print_man_nodelist(MAN_ARGS)
 170 {
 171
 172         print_man_node(m, n, mh, h);
 173         if (n->next)
 174                 print_man_nodelist(m, n->next, mh, h);
 175 }
 176
 177
 178 static void
 179 print_man_node(MAN_ARGS)
 180 {
 181         int              child;
 182         struct tag      *t;
 183         struct htmlpair  tag;
 184
 185         child = 1;
 186         t = h->tags.head;
 187         bufinit(h);
 188
 189         switch (n->type) {
 190         case (MAN_ROOT):
 191                 man_root_pre(m, n, mh, h);
 192                 break;
 193         case (MAN_TEXT):
 194                 /*
 195                  * If we have a blank line, output a vertical space.
 196                  * If we have a space as the first character, break
 197                  * before printing the line's data.
 198                  */
 199                 if ('\0' == *n->string) {
 200                         print_otag(h, TAG_P, 0, NULL);
 201                         return;
 202                 } else if (' ' == *n->string && MAN_LINE & n->flags)
 203                         print_otag(h, TAG_BR, 0, NULL);
 204
 205                 print_text(h, n->string);
 206
 207                 /*
 208                  * If we're in a literal context, make sure that words
 209                  * togehter on the same line stay together.  This is a
 210                  * POST-printing call, so we check the NEXT word.  Since
 211                  * -man doesn't have nested macros, we don't need to be
 212                  * more specific than this.
 213                  */
 214                 if (MANH_LITERAL & mh->fl &&
 215                                 (NULL == n->next ||
 216                                  n->next->line > n->line))
 217                         print_otag(h, TAG_BR, 0, NULL);
 218                 return;
 219         case (MAN_EQN):
 220                 PAIR_CLASS_INIT(&tag, "eqn");
 221                 print_otag(h, TAG_SPAN, 1, &tag);
 222                 print_text(h, n->eqn->data);
 223                 break;
 224         case (MAN_TBL):
 225                 /*
 226                  * This will take care of initialising all of the table
 227                  * state data for the first table, then tearing it down
 228                  * for the last one.
 229                  */
 230                 print_tbl(h, n->span);
 231                 return;
 232         default:
 233                 /*
 234                  * Close out scope of font prior to opening a macro
 235                  * scope.
 236                  */
 237                 if (HTMLFONT_NONE != h->metac) {
 238                         h->metal = h->metac;
 239                         h->metac = HTMLFONT_NONE;
 240                 }
 241
 242                 /*
 243                  * Close out the current table, if it's open, and unset
 244                  * the "meta" table state.  This will be reopened on the
 245                  * next table element.
 246                  */
 247                 if (h->tblt) {
 248                         print_tblclose(h);
 249                         t = h->tags.head;
 250                 }
 251                 if (mans[n->tok].pre)
 252                         child = (*mans[n->tok].pre)(m, n, mh, h);
 253                 break;
 254         }
 255
 256         if (child && n->child)
 257                 print_man_nodelist(m, n->child, mh, h);
 258
 259         /* This will automatically close out any font scope. */
 260         print_stagq(h, t);
 261
 262         bufinit(h);
 263
 264         switch (n->type) {
 265         case (MAN_ROOT):
 266                 man_root_post(m, n, mh, h);
 267                 break;
 268         case (MAN_EQN):
 269                 break;
 270         default:
 271                 if (mans[n->tok].post)
 272                         (*mans[n->tok].post)(m, n, mh, h);
 273                 break;
 274         }
 275 }
 276
 277
 278 static int
 279 a2width(const struct man_node *n, struct roffsu *su)
 280 {
 281
 282         if (MAN_TEXT != n->type)
 283                 return(0);
 284         if (a2roffsu(n->string, su, SCALE_BU))
 285                 return(1);
 286
 287         return(0);
 288 }
 289
 290
 291 /* ARGSUSED */
 292 static void
 293 man_root_pre(MAN_ARGS)
 294 {
 295         struct htmlpair  tag[3];
 296         struct tag      *t, *tt;
 297         char             b[BUFSIZ], title[BUFSIZ];
 298
 299         b[0] = 0;
 300         if (m->vol)
 301                 (void)strlcat(b, m->vol, BUFSIZ);
 302
 303         snprintf(title, BUFSIZ - 1, "%s(%s)", m->title, m->msec);
 304
 305         PAIR_SUMMARY_INIT(&tag[0], "Document Header");
 306         PAIR_CLASS_INIT(&tag[1], "head");
 307         if (NULL == h->style) {
 308                 PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 309                 t = print_otag(h, TAG_TABLE, 3, tag);
 310                 PAIR_INIT(&tag[0], ATTR_WIDTH, "30%");
 311                 print_otag(h, TAG_COL, 1, tag);
 312                 print_otag(h, TAG_COL, 1, tag);
 313                 print_otag(h, TAG_COL, 1, tag);
 314         } else
 315                 t = print_otag(h, TAG_TABLE, 2, tag);
 316
 317         print_otag(h, TAG_TBODY, 0, NULL);
 318
 319         tt = print_otag(h, TAG_TR, 0, NULL);
 320
 321         PAIR_CLASS_INIT(&tag[0], "head-ltitle");
 322         print_otag(h, TAG_TD, 1, tag);
 323
 324         print_text(h, title);
 325         print_stagq(h, tt);
 326
 327         PAIR_CLASS_INIT(&tag[0], "head-vol");
 328         if (NULL == h->style) {
 329                 PAIR_INIT(&tag[1], ATTR_ALIGN, "center");
 330                 print_otag(h, TAG_TD, 2, tag);
 331         } else
 332                 print_otag(h, TAG_TD, 1, tag);
 333
 334         print_text(h, b);
 335         print_stagq(h, tt);
 336
 337         PAIR_CLASS_INIT(&tag[0], "head-rtitle");
 338         if (NULL == h->style) {
 339                 PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 340                 print_otag(h, TAG_TD, 2, tag);
 341         } else
 342                 print_otag(h, TAG_TD, 1, tag);
 343
 344         print_text(h, title);
 345         print_tagq(h, t);
 346 }
 347
 348
 349 /* ARGSUSED */
 350 static void
 351 man_root_post(MAN_ARGS)
 352 {
 353         struct htmlpair  tag[3];
 354         struct tag      *t, *tt;
 355
 356         PAIR_SUMMARY_INIT(&tag[0], "Document Footer");
 357         PAIR_CLASS_INIT(&tag[1], "foot");
 358         if (NULL == h->style) {
 359                 PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 360                 t = print_otag(h, TAG_TABLE, 3, tag);
 361                 PAIR_INIT(&tag[0], ATTR_WIDTH, "50%");
 362                 print_otag(h, TAG_COL, 1, tag);
 363                 print_otag(h, TAG_COL, 1, tag);
 364         } else
 365                 t = print_otag(h, TAG_TABLE, 2, tag);
 366
 367         tt = print_otag(h, TAG_TR, 0, NULL);
 368
 369         PAIR_CLASS_INIT(&tag[0], "foot-date");
 370         print_otag(h, TAG_TD, 1, tag);
 371
 372         print_text(h, m->date);
 373         print_stagq(h, tt);
 374
 375         PAIR_CLASS_INIT(&tag[0], "foot-os");
 376         if (NULL == h->style) {
 377                 PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 378                 print_otag(h, TAG_TD, 2, tag);
 379         } else
 380                 print_otag(h, TAG_TD, 1, tag);
 381
 382         if (m->source)
 383                 print_text(h, m->source);
 384         print_tagq(h, t);
 385 }
 386
 387
 388
 389 /* ARGSUSED */
 390 static int
 391 man_br_pre(MAN_ARGS)
 392 {
 393         struct roffsu    su;
 394         struct htmlpair  tag;
 395
 396         SCALE_VS_INIT(&su, 1);
 397
 398         if (MAN_sp == n->tok) {
 399                 if (n->child)
 400                         a2roffsu(n->child->string, &su, SCALE_VS);
 401         } else
 402                 su.scale = 0;
 403
 404         bufcat_su(h, "height", &su);
 405         PAIR_STYLE_INIT(&tag, h);
 406         print_otag(h, TAG_DIV, 1, &tag);
 407
 408         /* So the div isn't empty: */
 409         print_text(h, "\\~");
 410
 411         return(0);
 412 }
 413
 414
 415 /* ARGSUSED */
 416 static int
 417 man_SH_pre(MAN_ARGS)
 418 {
 419         struct htmlpair  tag;
 420
 421         if (MAN_BLOCK == n->type) {
 422                 PAIR_CLASS_INIT(&tag, "section");
 423                 print_otag(h, TAG_DIV, 1, &tag);
 424                 return(1);
 425         } else if (MAN_BODY == n->type)
 426                 return(1);
 427
 428         print_otag(h, TAG_H1, 0, NULL);
 429         return(1);
 430 }
 431
 432
 433 /* ARGSUSED */
 434 static int
 435 man_alt_pre(MAN_ARGS)
 436 {
 437         const struct man_node   *nn;
 438         int              i;
 439         enum htmltag     fp;
 440         struct tag      *t;
 441
 442         for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
 443                 t = NULL;
 444                 switch (n->tok) {
 445                 case (MAN_BI):
 446                         fp = i % 2 ? TAG_I : TAG_B;
 447                         break;
 448                 case (MAN_IB):
 449                         fp = i % 2 ? TAG_B : TAG_I;
 450                         break;
 451                 case (MAN_RI):
 452                         fp = i % 2 ? TAG_I : TAG_MAX;
 453                         break;
 454                 case (MAN_IR):
 455                         fp = i % 2 ? TAG_MAX : TAG_I;
 456                         break;
 457                 case (MAN_BR):
 458                         fp = i % 2 ? TAG_MAX : TAG_B;
 459                         break;
 460                 case (MAN_RB):
 461                         fp = i % 2 ? TAG_B : TAG_MAX;
 462                         break;
 463                 default:
 464                         abort();
 465                         /* NOTREACHED */
 466                 }
 467
 468                 if (i)
 469                         h->flags |= HTML_NOSPACE;
 470
 471                 if (TAG_MAX != fp)
 472                         t = print_otag(h, fp, 0, NULL);
 473
 474                 print_man_node(m, nn, mh, h);
 475
 476                 if (t)
 477                         print_tagq(h, t);
 478         }
 479
 480         return(0);
 481 }
 482
 483
 484 /* ARGSUSED */
 485 static int
 486 man_SM_pre(MAN_ARGS)
 487 {
 488
 489         print_otag(h, TAG_SMALL, 0, NULL);
 490         if (MAN_SB == n->tok)
 491                 print_otag(h, TAG_B, 0, NULL);
 492         return(1);
 493 }
 494
 495
 496 /* ARGSUSED */
 497 static int
 498 man_SS_pre(MAN_ARGS)
 499 {
 500         struct htmlpair  tag;
 501
 502         if (MAN_BLOCK == n->type) {
 503                 PAIR_CLASS_INIT(&tag, "subsection");
 504                 print_otag(h, TAG_DIV, 1, &tag);
 505                 return(1);
 506         } else if (MAN_BODY == n->type)
 507                 return(1);
 508
 509         print_otag(h, TAG_H2, 0, NULL);
 510         return(1);
 511 }
 512
 513
 514 /* ARGSUSED */
 515 static int
 516 man_PP_pre(MAN_ARGS)
 517 {
 518
 519         if (MAN_HEAD == n->type)
 520                 return(0);
 521         else if (MAN_BODY == n->type && n->prev)
 522                 print_otag(h, TAG_P, 0, NULL);
 523
 524         return(1);
 525 }
 526
 527
 528 /* ARGSUSED */
 529 static int
 530 man_IP_pre(MAN_ARGS)
 531 {
 532         struct roffsu            su;
 533         struct htmlpair          tag;
 534         const struct man_node   *nn;
 535
 536         /*
 537          * This scattering of 1-BU margins and pads is to make sure that
 538          * when text overruns its box, the subsequent text isn't flush
 539          * up against it.  However, the rest of the right-hand box must
 540          * also be adjusted in consideration of this 1-BU space.
 541          */
 542
 543         if (MAN_BODY == n->type) {
 544                 print_otag(h, TAG_TD, 0, NULL);
 545                 return(1);
 546         }
 547
 548         nn = MAN_BLOCK == n->type ?
 549                 n->head->child : n->parent->head->child;
 550
 551         SCALE_HS_INIT(&su, INDENT);
 552
 553         /* Width is the second token. */
 554
 555         if (MAN_IP == n->tok && NULL != nn)
 556                 if (NULL != (nn = nn->next))
 557                         a2width(nn, &su);
 558
 559         /* Width is the first token. */
 560
 561         if (MAN_TP == n->tok && NULL != nn) {
 562                 /* Skip past non-text children. */
 563                 while (nn && MAN_TEXT != nn->type)
 564                         nn = nn->next;
 565                 if (nn)
 566                         a2width(nn, &su);
 567         }
 568
 569         if (MAN_BLOCK == n->type) {
 570                 print_otag(h, TAG_P, 0, NULL);
 571                 print_otag(h, TAG_TABLE, 0, NULL);
 572                 bufcat_su(h, "width", &su);
 573                 PAIR_STYLE_INIT(&tag, h);
 574                 print_otag(h, TAG_COL, 1, &tag);
 575                 print_otag(h, TAG_COL, 0, NULL);
 576                 print_otag(h, TAG_TBODY, 0, NULL);
 577                 print_otag(h, TAG_TR, 0, NULL);
 578                 return(1);
 579         }
 580
 581         print_otag(h, TAG_TD, 0, NULL);
 582
 583         /* For IP, only print the first header element. */
 584
 585         if (MAN_IP == n->tok && n->child)
 586                 print_man_node(m, n->child, mh, h);
 587
 588         /* For TP, only print next-line header elements. */
 589
 590         if (MAN_TP == n->tok)
 591                 for (nn = n->child; nn; nn = nn->next)
 592                         if (nn->line > n->line)
 593                                 print_man_node(m, nn, mh, h);
 594
 595         return(0);
 596 }
 597
 598
 599 /* ARGSUSED */
 600 static int
 601 man_HP_pre(MAN_ARGS)
 602 {
 603         struct htmlpair  tag;
 604         struct roffsu    su;
 605         const struct man_node *np;
 606
 607         np = MAN_BLOCK == n->type ?
 608                 n->head->child :
 609                 n->parent->head->child;
 610
 611         if (NULL == np || ! a2width(np, &su))
 612                 SCALE_HS_INIT(&su, INDENT);
 613
 614         if (MAN_HEAD == n->type) {
 615                 print_otag(h, TAG_TD, 0, NULL);
 616                 return(0);
 617         } else if (MAN_BLOCK == n->type) {
 618                 print_otag(h, TAG_P, 0, NULL);
 619                 print_otag(h, TAG_TABLE, 0, NULL);
 620                 bufcat_su(h, "width", &su);
 621                 PAIR_STYLE_INIT(&tag, h);
 622                 print_otag(h, TAG_COL, 1, &tag);
 623                 print_otag(h, TAG_COL, 0, NULL);
 624                 print_otag(h, TAG_TBODY, 0, NULL);
 625                 print_otag(h, TAG_TR, 0, NULL);
 626                 return(1);
 627         }
 628
 629         su.scale = -su.scale;
 630         bufcat_su(h, "text-indent", &su);
 631         PAIR_STYLE_INIT(&tag, h);
 632         print_otag(h, TAG_TD, 1, &tag);
 633         return(1);
 634 }
 635
 636
 637 /* ARGSUSED */
 638 static int
 639 man_B_pre(MAN_ARGS)
 640 {
 641
 642         print_otag(h, TAG_B, 0, NULL);
 643         return(1);
 644 }
 645
 646
 647 /* ARGSUSED */
 648 static int
 649 man_I_pre(MAN_ARGS)
 650 {
 651
 652         print_otag(h, TAG_I, 0, NULL);
 653         return(1);
 654 }
 655
 656
 657 /* ARGSUSED */
 658 static int
 659 man_literal_pre(MAN_ARGS)
 660 {
 661
 662         if (MAN_nf == n->tok) {
 663                 print_otag(h, TAG_BR, 0, NULL);
 664                 mh->fl |= MANH_LITERAL;
 665         } else
 666                 mh->fl &= ~MANH_LITERAL;
 667
 668         return(0);
 669 }
 670
 671
 672 /* ARGSUSED */
 673 static int
 674 man_in_pre(MAN_ARGS)
 675 {
 676
 677         print_otag(h, TAG_BR, 0, NULL);
 678         return(0);
 679 }
 680
 681
 682 /* ARGSUSED */
 683 static int
 684 man_ign_pre(MAN_ARGS)
 685 {
 686
 687         return(0);
 688 }
 689
 690
 691 /* ARGSUSED */
 692 static int
 693 man_RS_pre(MAN_ARGS)
 694 {
 695         struct htmlpair  tag;
 696         struct roffsu    su;
 697
 698         if (MAN_HEAD == n->type)
 699                 return(0);
 700         else if (MAN_BODY == n->type)
 701                 return(1);
 702
 703         SCALE_HS_INIT(&su, INDENT);
 704         if (n->head->child)
 705                 a2width(n->head->child, &su);
 706
 707         bufcat_su(h, "margin-left", &su);
 708         PAIR_STYLE_INIT(&tag, h);
 709         print_otag(h, TAG_DIV, 1, &tag);
 710         return(1);
 711 }