man_html.c

   1 /*      $Id: man_html.c,v 1.61 2011/01/04 10:31:15 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010 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  int               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         { NULL, 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
 184         child = 1;
 185         t = h->tags.head;
 186
 187         bufinit(h);
 188
 189         /*
 190          * FIXME: embedded elements within next-line scopes (e.g., `br'
 191          * within an empty `B') will cause formatting to be forgotten
 192          * due to scope closing out.
 193          */
 194
 195         switch (n->type) {
 196         case (MAN_ROOT):
 197                 child = man_root_pre(m, n, mh, h);
 198                 break;
 199         case (MAN_TEXT):
 200                 print_text(h, n->string);
 201                 if (MANH_LITERAL & mh->fl)
 202                         print_otag(h, TAG_BR, 0, NULL);
 203                 return;
 204         case (MAN_TBL):
 205                 print_tbl(h, n->span);
 206                 break;
 207         default:
 208                 /*
 209                  * Close out scope of font prior to opening a macro
 210                  * scope.  Assert that the metafont is on the top of the
 211                  * stack (it's never nested).
 212                  */
 213                 if (HTMLFONT_NONE != h->metac) {
 214                         h->metal = h->metac;
 215                         h->metac = HTMLFONT_NONE;
 216                 }
 217                 if (mans[n->tok].pre)
 218                         child = (*mans[n->tok].pre)(m, n, mh, h);
 219                 break;
 220         }
 221
 222         if (child && n->child)
 223                 print_man_nodelist(m, n->child, mh, h);
 224
 225         /* This will automatically close out any font scope. */
 226         print_stagq(h, t);
 227
 228         bufinit(h);
 229
 230         switch (n->type) {
 231         case (MAN_ROOT):
 232                 man_root_post(m, n, mh, h);
 233                 break;
 234         case (MAN_TBL):
 235                 break;
 236         default:
 237                 if (mans[n->tok].post)
 238                         (*mans[n->tok].post)(m, n, mh, h);
 239                 break;
 240         }
 241 }
 242
 243
 244 static int
 245 a2width(const struct man_node *n, struct roffsu *su)
 246 {
 247
 248         if (MAN_TEXT != n->type)
 249                 return(0);
 250         if (a2roffsu(n->string, su, SCALE_BU))
 251                 return(1);
 252
 253         return(0);
 254 }
 255
 256
 257 /* ARGSUSED */
 258 static int
 259 man_root_pre(MAN_ARGS)
 260 {
 261         struct htmlpair  tag[3];
 262         struct tag      *t, *tt;
 263         char             b[BUFSIZ], title[BUFSIZ];
 264
 265         b[0] = 0;
 266         if (m->vol)
 267                 (void)strlcat(b, m->vol, BUFSIZ);
 268
 269         snprintf(title, BUFSIZ - 1, "%s(%s)", m->title, m->msec);
 270
 271         PAIR_SUMMARY_INIT(&tag[0], "Document Header");
 272         PAIR_CLASS_INIT(&tag[1], "head");
 273         if (NULL == h->style) {
 274                 PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 275                 t = print_otag(h, TAG_TABLE, 3, tag);
 276                 PAIR_INIT(&tag[0], ATTR_WIDTH, "30%");
 277                 print_otag(h, TAG_COL, 1, tag);
 278                 print_otag(h, TAG_COL, 1, tag);
 279                 print_otag(h, TAG_COL, 1, tag);
 280         } else
 281                 t = print_otag(h, TAG_TABLE, 2, tag);
 282
 283         print_otag(h, TAG_TBODY, 0, NULL);
 284
 285         tt = print_otag(h, TAG_TR, 0, NULL);
 286
 287         PAIR_CLASS_INIT(&tag[0], "head-ltitle");
 288         print_otag(h, TAG_TD, 1, tag);
 289
 290         print_text(h, title);
 291         print_stagq(h, tt);
 292
 293         PAIR_CLASS_INIT(&tag[0], "head-vol");
 294         if (NULL == h->style) {
 295                 PAIR_INIT(&tag[1], ATTR_ALIGN, "center");
 296                 print_otag(h, TAG_TD, 2, tag);
 297         } else
 298                 print_otag(h, TAG_TD, 1, tag);
 299
 300         print_text(h, b);
 301         print_stagq(h, tt);
 302
 303         PAIR_CLASS_INIT(&tag[0], "head-rtitle");
 304         if (NULL == h->style) {
 305                 PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 306                 print_otag(h, TAG_TD, 2, tag);
 307         } else
 308                 print_otag(h, TAG_TD, 1, tag);
 309
 310         print_text(h, title);
 311         print_tagq(h, t);
 312         return(1);
 313 }
 314
 315
 316 /* ARGSUSED */
 317 static void
 318 man_root_post(MAN_ARGS)
 319 {
 320         struct htmlpair  tag[3];
 321         struct tag      *t, *tt;
 322         char             b[DATESIZ];
 323
 324         if (m->rawdate)
 325                 strlcpy(b, m->rawdate, DATESIZ);
 326         else
 327                 time2a(m->date, b, DATESIZ);
 328
 329         PAIR_SUMMARY_INIT(&tag[0], "Document Footer");
 330         PAIR_CLASS_INIT(&tag[1], "foot");
 331         if (NULL == h->style) {
 332                 PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 333                 t = print_otag(h, TAG_TABLE, 3, tag);
 334                 PAIR_INIT(&tag[0], ATTR_WIDTH, "50%");
 335                 print_otag(h, TAG_COL, 1, tag);
 336                 print_otag(h, TAG_COL, 1, tag);
 337         } else
 338                 t = print_otag(h, TAG_TABLE, 2, tag);
 339
 340         tt = print_otag(h, TAG_TR, 0, NULL);
 341
 342         PAIR_CLASS_INIT(&tag[0], "foot-date");
 343         print_otag(h, TAG_TD, 1, tag);
 344
 345         print_text(h, b);
 346         print_stagq(h, tt);
 347
 348         PAIR_CLASS_INIT(&tag[0], "foot-os");
 349         if (NULL == h->style) {
 350                 PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 351                 print_otag(h, TAG_TD, 2, tag);
 352         } else
 353                 print_otag(h, TAG_TD, 1, tag);
 354
 355         if (m->source)
 356                 print_text(h, m->source);
 357         print_tagq(h, t);
 358 }
 359
 360
 361
 362 /* ARGSUSED */
 363 static int
 364 man_br_pre(MAN_ARGS)
 365 {
 366         struct roffsu    su;
 367         struct htmlpair  tag;
 368
 369         SCALE_VS_INIT(&su, 1);
 370
 371         if (MAN_sp == n->tok) {
 372                 if (n->child)
 373                         a2roffsu(n->child->string, &su, SCALE_VS);
 374         } else
 375                 su.scale = 0;
 376
 377         bufcat_su(h, "height", &su);
 378         PAIR_STYLE_INIT(&tag, h);
 379         print_otag(h, TAG_DIV, 1, &tag);
 380
 381         /* So the div isn't empty: */
 382         print_text(h, "\\~");
 383
 384         return(0);
 385 }
 386
 387
 388 /* ARGSUSED */
 389 static int
 390 man_SH_pre(MAN_ARGS)
 391 {
 392         struct htmlpair  tag;
 393
 394         if (MAN_BLOCK == n->type) {
 395                 PAIR_CLASS_INIT(&tag, "section");
 396                 print_otag(h, TAG_DIV, 1, &tag);
 397                 return(1);
 398         } else if (MAN_BODY == n->type)
 399                 return(1);
 400
 401         print_otag(h, TAG_H1, 0, NULL);
 402         return(1);
 403 }
 404
 405
 406 /* ARGSUSED */
 407 static int
 408 man_alt_pre(MAN_ARGS)
 409 {
 410         const struct man_node   *nn;
 411         int              i;
 412         enum htmltag     fp;
 413         struct tag      *t;
 414
 415         for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
 416                 t = NULL;
 417                 switch (n->tok) {
 418                 case (MAN_BI):
 419                         fp = i % 2 ? TAG_I : TAG_B;
 420                         break;
 421                 case (MAN_IB):
 422                         fp = i % 2 ? TAG_B : TAG_I;
 423                         break;
 424                 case (MAN_RI):
 425                         fp = i % 2 ? TAG_I : TAG_MAX;
 426                         break;
 427                 case (MAN_IR):
 428                         fp = i % 2 ? TAG_MAX : TAG_I;
 429                         break;
 430                 case (MAN_BR):
 431                         fp = i % 2 ? TAG_MAX : TAG_B;
 432                         break;
 433                 case (MAN_RB):
 434                         fp = i % 2 ? TAG_B : TAG_MAX;
 435                         break;
 436                 default:
 437                         abort();
 438                         /* NOTREACHED */
 439                 }
 440
 441                 if (i)
 442                         h->flags |= HTML_NOSPACE;
 443
 444                 if (TAG_MAX != fp)
 445                         t = print_otag(h, fp, 0, NULL);
 446
 447                 print_man_node(m, nn, mh, h);
 448
 449                 if (t)
 450                         print_tagq(h, t);
 451         }
 452
 453         return(0);
 454 }
 455
 456
 457 /* ARGSUSED */
 458 static int
 459 man_SM_pre(MAN_ARGS)
 460 {
 461
 462         print_otag(h, TAG_SMALL, 0, NULL);
 463         if (MAN_SB == n->tok)
 464                 print_otag(h, TAG_B, 0, NULL);
 465         return(1);
 466 }
 467
 468
 469 /* ARGSUSED */
 470 static int
 471 man_SS_pre(MAN_ARGS)
 472 {
 473         struct htmlpair  tag;
 474
 475         if (MAN_BLOCK == n->type) {
 476                 PAIR_CLASS_INIT(&tag, "subsection");
 477                 print_otag(h, TAG_DIV, 1, &tag);
 478                 return(1);
 479         } else if (MAN_BODY == n->type)
 480                 return(1);
 481
 482         print_otag(h, TAG_H2, 0, NULL);
 483         return(1);
 484 }
 485
 486
 487 /* ARGSUSED */
 488 static int
 489 man_PP_pre(MAN_ARGS)
 490 {
 491
 492         if (MAN_HEAD == n->type)
 493                 return(0);
 494         else if (MAN_BODY == n->type && n->prev)
 495                 print_otag(h, TAG_P, 0, NULL);
 496
 497         return(1);
 498 }
 499
 500
 501 /* ARGSUSED */
 502 static int
 503 man_IP_pre(MAN_ARGS)
 504 {
 505         struct roffsu            su;
 506         struct htmlpair          tag;
 507         const struct man_node   *nn;
 508         int                      width;
 509
 510         /*
 511          * This scattering of 1-BU margins and pads is to make sure that
 512          * when text overruns its box, the subsequent text isn't flush
 513          * up against it.  However, the rest of the right-hand box must
 514          * also be adjusted in consideration of this 1-BU space.
 515          */
 516
 517         if (MAN_BODY == n->type) {
 518                 print_otag(h, TAG_TD, 0, NULL);
 519                 return(1);
 520         }
 521
 522         nn = MAN_BLOCK == n->type ?
 523                 n->head->child : n->parent->head->child;
 524
 525         SCALE_HS_INIT(&su, INDENT);
 526         width = 0;
 527
 528         /* Width is the second token. */
 529
 530         if (MAN_IP == n->tok && NULL != nn)
 531                 if (NULL != (nn = nn->next))
 532                         width = a2width(nn, &su);
 533
 534         /* Width is the first token. */
 535
 536         if (MAN_TP == n->tok && NULL != nn) {
 537                 /* Skip past non-text children. */
 538                 while (nn && MAN_TEXT != nn->type)
 539                         nn = nn->next;
 540                 if (nn)
 541                         width = a2width(nn, &su);
 542         }
 543
 544         if (MAN_BLOCK == n->type) {
 545                 print_otag(h, TAG_P, 0, NULL);
 546                 print_otag(h, TAG_TABLE, 0, NULL);
 547                 bufcat_su(h, "width", &su);
 548                 PAIR_STYLE_INIT(&tag, h);
 549                 print_otag(h, TAG_COL, 1, &tag);
 550                 print_otag(h, TAG_COL, 0, NULL);
 551                 print_otag(h, TAG_TBODY, 0, NULL);
 552                 print_otag(h, TAG_TR, 0, NULL);
 553                 return(1);
 554         }
 555
 556         print_otag(h, TAG_TD, 0, NULL);
 557
 558         /* For IP, only print the first header element. */
 559
 560         if (MAN_IP == n->tok && n->child)
 561                 print_man_node(m, n->child, mh, h);
 562
 563         /* For TP, only print next-line header elements. */
 564
 565         if (MAN_TP == n->tok)
 566                 for (nn = n->child; nn; nn = nn->next)
 567                         if (nn->line > n->line)
 568                                 print_man_node(m, nn, mh, h);
 569
 570         return(0);
 571 }
 572
 573
 574 /* ARGSUSED */
 575 static int
 576 man_HP_pre(MAN_ARGS)
 577 {
 578         struct htmlpair  tag;
 579         struct roffsu    su;
 580         const struct man_node *np;
 581
 582         np = MAN_BLOCK == n->type ?
 583                 n->head->child :
 584                 n->parent->head->child;
 585
 586         if (NULL == np || ! a2width(np, &su))
 587                 SCALE_HS_INIT(&su, INDENT);
 588
 589         if (MAN_HEAD == n->type) {
 590                 print_otag(h, TAG_TD, 0, NULL);
 591                 return(0);
 592         } else if (MAN_BLOCK == n->type) {
 593                 print_otag(h, TAG_P, 0, NULL);
 594                 print_otag(h, TAG_TABLE, 0, NULL);
 595                 bufcat_su(h, "width", &su);
 596                 PAIR_STYLE_INIT(&tag, h);
 597                 print_otag(h, TAG_COL, 1, &tag);
 598                 print_otag(h, TAG_COL, 0, NULL);
 599                 print_otag(h, TAG_TBODY, 0, NULL);
 600                 print_otag(h, TAG_TR, 0, NULL);
 601                 return(1);
 602         }
 603
 604         su.scale = -su.scale;
 605         bufcat_su(h, "text-indent", &su);
 606         PAIR_STYLE_INIT(&tag, h);
 607         print_otag(h, TAG_TD, 1, &tag);
 608         return(1);
 609 }
 610
 611
 612 /* ARGSUSED */
 613 static int
 614 man_B_pre(MAN_ARGS)
 615 {
 616
 617         print_otag(h, TAG_B, 0, NULL);
 618         return(1);
 619 }
 620
 621
 622 /* ARGSUSED */
 623 static int
 624 man_I_pre(MAN_ARGS)
 625 {
 626
 627         print_otag(h, TAG_I, 0, NULL);
 628         return(1);
 629 }
 630
 631
 632 /* ARGSUSED */
 633 static int
 634 man_literal_pre(MAN_ARGS)
 635 {
 636
 637         if (MAN_nf == n->tok) {
 638                 print_otag(h, TAG_BR, 0, NULL);
 639                 mh->fl |= MANH_LITERAL;
 640         } else
 641                 mh->fl &= ~MANH_LITERAL;
 642
 643         return(1);
 644 }
 645
 646
 647 /* ARGSUSED */
 648 static int
 649 man_in_pre(MAN_ARGS)
 650 {
 651
 652         print_otag(h, TAG_BR, 0, NULL);
 653         return(0);
 654 }
 655
 656
 657 /* ARGSUSED */
 658 static int
 659 man_ign_pre(MAN_ARGS)
 660 {
 661
 662         return(0);
 663 }
 664
 665
 666 /* ARGSUSED */
 667 static int
 668 man_RS_pre(MAN_ARGS)
 669 {
 670         struct htmlpair  tag;
 671         struct roffsu    su;
 672
 673         if (MAN_HEAD == n->type)
 674                 return(0);
 675         else if (MAN_BODY == n->type)
 676                 return(1);
 677
 678         SCALE_HS_INIT(&su, INDENT);
 679         if (n->head->child)
 680                 a2width(n->head->child, &su);
 681
 682         bufcat_su(h, "margin-left", &su);
 683         PAIR_STYLE_INIT(&tag, h);
 684         print_otag(h, TAG_DIV, 1, &tag);
 685         return(1);
 686 }