external/bsd/mdocml/dist/man_html.c

   1 /*      $Vendor-Id: man_html.c,v 1.86 2012/01/03 15:16:24 kristaps 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
  40 #define MAN_ARGS          const struct man_meta *m, \
  41                           const struct man_node *n, \
  42                           struct mhtml *mh, \
  43                           struct html *h
  44
  45 struct  mhtml {
  46         int               fl;
  47 #define MANH_LITERAL     (1 << 0) /* literal context */
  48 };
  49
  50 struct  htmlman {
  51         int             (*pre)(MAN_ARGS);
  52         int             (*post)(MAN_ARGS);
  53 };
  54
  55 static  void              print_bvspace(struct html *,
  56                                 const struct man_node *);
  57 static  void              print_man(MAN_ARGS);
  58 static  void              print_man_head(MAN_ARGS);
  59 static  void              print_man_nodelist(MAN_ARGS);
  60 static  void              print_man_node(MAN_ARGS);
  61 static  int               a2width(const struct man_node *,
  62                                 struct roffsu *);
  63 static  int               man_B_pre(MAN_ARGS);
  64 static  int               man_HP_pre(MAN_ARGS);
  65 static  int               man_IP_pre(MAN_ARGS);
  66 static  int               man_I_pre(MAN_ARGS);
  67 static  int               man_OP_pre(MAN_ARGS);
  68 static  int               man_PP_pre(MAN_ARGS);
  69 static  int               man_RS_pre(MAN_ARGS);
  70 static  int               man_SH_pre(MAN_ARGS);
  71 static  int               man_SM_pre(MAN_ARGS);
  72 static  int               man_SS_pre(MAN_ARGS);
  73 static  int               man_alt_pre(MAN_ARGS);
  74 static  int               man_br_pre(MAN_ARGS);
  75 static  int               man_ign_pre(MAN_ARGS);
  76 static  int               man_in_pre(MAN_ARGS);
  77 static  int               man_literal_pre(MAN_ARGS);
  78 static  void              man_root_post(MAN_ARGS);
  79 static  void              man_root_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         { man_OP_pre, NULL }, /* OP */
 116 };
 117
 118 /*
 119  * Printing leading vertical space before a block.
 120  * This is used for the paragraph macros.
 121  * The rules are pretty simple, since there's very little nesting going
 122  * on here.  Basically, if we're the first within another block (SS/SH),
 123  * then don't emit vertical space.  If we are (RS), then do.  If not the
 124  * first, print it.
 125  */
 126 static void
 127 print_bvspace(struct html *h, const struct man_node *n)
 128 {
 129
 130         if (n->body && n->body->child)
 131                 if (MAN_TBL == n->body->child->type)
 132                         return;
 133
 134         if (MAN_ROOT == n->parent->type || MAN_RS != n->parent->tok)
 135                 if (NULL == n->prev)
 136                         return;
 137
 138         print_otag(h, TAG_P, 0, NULL);
 139 }
 140
 141 void
 142 html_man(void *arg, const struct man *m)
 143 {
 144         struct mhtml     mh;
 145
 146         memset(&mh, 0, sizeof(struct mhtml));
 147         print_man(man_meta(m), man_node(m), &mh, (struct html *)arg);
 148         putchar('\n');
 149 }
 150
 151 static void
 152 print_man(MAN_ARGS)
 153 {
 154         struct tag      *t, *tt;
 155         struct htmlpair  tag;
 156
 157         PAIR_CLASS_INIT(&tag, "mandoc");
 158
 159         if ( ! (HTML_FRAGMENT & h->oflags)) {
 160                 print_gen_decls(h);
 161                 t = print_otag(h, TAG_HTML, 0, NULL);
 162                 tt = print_otag(h, TAG_HEAD, 0, NULL);
 163                 print_man_head(m, n, mh, h);
 164                 print_tagq(h, tt);
 165                 print_otag(h, TAG_BODY, 0, NULL);
 166                 print_otag(h, TAG_DIV, 1, &tag);
 167         } else
 168                 t = print_otag(h, TAG_DIV, 1, &tag);
 169
 170         print_man_nodelist(m, n, mh, h);
 171         print_tagq(h, t);
 172 }
 173
 174
 175 /* ARGSUSED */
 176 static void
 177 print_man_head(MAN_ARGS)
 178 {
 179
 180         print_gen_head(h);
 181         assert(m->title);
 182         assert(m->msec);
 183         bufcat_fmt(h, "%s(%s)", m->title, m->msec);
 184         print_otag(h, TAG_TITLE, 0, NULL);
 185         print_text(h, h->buf);
 186 }
 187
 188
 189 static void
 190 print_man_nodelist(MAN_ARGS)
 191 {
 192
 193         print_man_node(m, n, mh, h);
 194         if (n->next)
 195                 print_man_nodelist(m, n->next, mh, h);
 196 }
 197
 198
 199 static void
 200 print_man_node(MAN_ARGS)
 201 {
 202         int              child;
 203         struct tag      *t;
 204
 205         child = 1;
 206         t = h->tags.head;
 207
 208         switch (n->type) {
 209         case (MAN_ROOT):
 210                 man_root_pre(m, n, mh, h);
 211                 break;
 212         case (MAN_TEXT):
 213                 /*
 214                  * If we have a blank line, output a vertical space.
 215                  * If we have a space as the first character, break
 216                  * before printing the line's data.
 217                  */
 218                 if ('\0' == *n->string) {
 219                         print_otag(h, TAG_P, 0, NULL);
 220                         return;
 221                 }
 222
 223                 if (' ' == *n->string && MAN_LINE & n->flags)
 224                         print_otag(h, TAG_BR, 0, NULL);
 225                 else if (MANH_LITERAL & mh->fl && n->prev)
 226                         print_otag(h, TAG_BR, 0, NULL);
 227
 228                 print_text(h, n->string);
 229                 return;
 230         case (MAN_EQN):
 231                 print_eqn(h, n->eqn);
 232                 break;
 233         case (MAN_TBL):
 234                 /*
 235                  * This will take care of initialising all of the table
 236                  * state data for the first table, then tearing it down
 237                  * for the last one.
 238                  */
 239                 print_tbl(h, n->span);
 240                 return;
 241         default:
 242                 /*
 243                  * Close out scope of font prior to opening a macro
 244                  * scope.
 245                  */
 246                 if (HTMLFONT_NONE != h->metac) {
 247                         h->metal = h->metac;
 248                         h->metac = HTMLFONT_NONE;
 249                 }
 250
 251                 /*
 252                  * Close out the current table, if it's open, and unset
 253                  * the "meta" table state.  This will be reopened on the
 254                  * next table element.
 255                  */
 256                 if (h->tblt) {
 257                         print_tblclose(h);
 258                         t = h->tags.head;
 259                 }
 260                 if (mans[n->tok].pre)
 261                         child = (*mans[n->tok].pre)(m, n, mh, h);
 262                 break;
 263         }
 264
 265         if (child && n->child)
 266                 print_man_nodelist(m, n->child, mh, h);
 267
 268         /* This will automatically close out any font scope. */
 269         print_stagq(h, t);
 270
 271         switch (n->type) {
 272         case (MAN_ROOT):
 273                 man_root_post(m, n, mh, h);
 274                 break;
 275         case (MAN_EQN):
 276                 break;
 277         default:
 278                 if (mans[n->tok].post)
 279                         (*mans[n->tok].post)(m, n, mh, h);
 280                 break;
 281         }
 282 }
 283
 284
 285 static int
 286 a2width(const struct man_node *n, struct roffsu *su)
 287 {
 288
 289         if (MAN_TEXT != n->type)
 290                 return(0);
 291         if (a2roffsu(n->string, su, SCALE_BU))
 292                 return(1);
 293
 294         return(0);
 295 }
 296
 297
 298 /* ARGSUSED */
 299 static void
 300 man_root_pre(MAN_ARGS)
 301 {
 302         struct htmlpair  tag[3];
 303         struct tag      *t, *tt;
 304         char             b[BUFSIZ], title[BUFSIZ];
 305
 306         b[0] = 0;
 307         if (m->vol)
 308                 (void)strlcat(b, m->vol, BUFSIZ);
 309
 310         assert(m->title);
 311         assert(m->msec);
 312         snprintf(title, BUFSIZ - 1, "%s(%s)", m->title, m->msec);
 313
 314         PAIR_SUMMARY_INIT(&tag[0], "Document Header");
 315         PAIR_CLASS_INIT(&tag[1], "head");
 316         PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 317         t = print_otag(h, TAG_TABLE, 3, tag);
 318         PAIR_INIT(&tag[0], ATTR_WIDTH, "30%");
 319         print_otag(h, TAG_COL, 1, tag);
 320         print_otag(h, TAG_COL, 1, tag);
 321         print_otag(h, TAG_COL, 1, tag);
 322
 323         print_otag(h, TAG_TBODY, 0, NULL);
 324
 325         tt = print_otag(h, TAG_TR, 0, NULL);
 326
 327         PAIR_CLASS_INIT(&tag[0], "head-ltitle");
 328         print_otag(h, TAG_TD, 1, tag);
 329         print_text(h, title);
 330         print_stagq(h, tt);
 331
 332         PAIR_CLASS_INIT(&tag[0], "head-vol");
 333         PAIR_INIT(&tag[1], ATTR_ALIGN, "center");
 334         print_otag(h, TAG_TD, 2, tag);
 335         print_text(h, b);
 336         print_stagq(h, tt);
 337
 338         PAIR_CLASS_INIT(&tag[0], "head-rtitle");
 339         PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 340         print_otag(h, TAG_TD, 2, tag);
 341         print_text(h, title);
 342         print_tagq(h, t);
 343 }
 344
 345
 346 /* ARGSUSED */
 347 static void
 348 man_root_post(MAN_ARGS)
 349 {
 350         struct htmlpair  tag[3];
 351         struct tag      *t, *tt;
 352
 353         PAIR_SUMMARY_INIT(&tag[0], "Document Footer");
 354         PAIR_CLASS_INIT(&tag[1], "foot");
 355         PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 356         t = print_otag(h, TAG_TABLE, 3, tag);
 357         PAIR_INIT(&tag[0], ATTR_WIDTH, "50%");
 358         print_otag(h, TAG_COL, 1, tag);
 359         print_otag(h, TAG_COL, 1, tag);
 360
 361         tt = print_otag(h, TAG_TR, 0, NULL);
 362
 363         PAIR_CLASS_INIT(&tag[0], "foot-date");
 364         print_otag(h, TAG_TD, 1, tag);
 365
 366         assert(m->date);
 367         print_text(h, m->date);
 368         print_stagq(h, tt);
 369
 370         PAIR_CLASS_INIT(&tag[0], "foot-os");
 371         PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 372         print_otag(h, TAG_TD, 2, tag);
 373
 374         if (m->source)
 375                 print_text(h, m->source);
 376         print_tagq(h, t);
 377 }
 378
 379
 380 /* ARGSUSED */
 381 static int
 382 man_br_pre(MAN_ARGS)
 383 {
 384         struct roffsu    su;
 385         struct htmlpair  tag;
 386
 387         SCALE_VS_INIT(&su, 1);
 388
 389         if (MAN_sp == n->tok) {
 390                 if (NULL != (n = n->child))
 391                         if ( ! a2roffsu(n->string, &su, SCALE_VS))
 392                                 SCALE_VS_INIT(&su, atoi(n->string));
 393         } else
 394                 su.scale = 0;
 395
 396         bufinit(h);
 397         bufcat_su(h, "height", &su);
 398         PAIR_STYLE_INIT(&tag, h);
 399         print_otag(h, TAG_DIV, 1, &tag);
 400
 401         /* So the div isn't empty: */
 402         print_text(h, "\\~");
 403
 404         return(0);
 405 }
 406
 407 /* ARGSUSED */
 408 static int
 409 man_SH_pre(MAN_ARGS)
 410 {
 411         struct htmlpair  tag;
 412
 413         if (MAN_BLOCK == n->type) {
 414                 mh->fl &= ~MANH_LITERAL;
 415                 PAIR_CLASS_INIT(&tag, "section");
 416                 print_otag(h, TAG_DIV, 1, &tag);
 417                 return(1);
 418         } else if (MAN_BODY == n->type)
 419                 return(1);
 420
 421         print_otag(h, TAG_H1, 0, NULL);
 422         return(1);
 423 }
 424
 425 /* ARGSUSED */
 426 static int
 427 man_alt_pre(MAN_ARGS)
 428 {
 429         const struct man_node   *nn;
 430         int              i, savelit;
 431         enum htmltag     fp;
 432         struct tag      *t;
 433
 434         if ((savelit = mh->fl & MANH_LITERAL))
 435                 print_otag(h, TAG_BR, 0, NULL);
 436
 437         mh->fl &= ~MANH_LITERAL;
 438
 439         for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
 440                 t = NULL;
 441                 switch (n->tok) {
 442                 case (MAN_BI):
 443                         fp = i % 2 ? TAG_I : TAG_B;
 444                         break;
 445                 case (MAN_IB):
 446                         fp = i % 2 ? TAG_B : TAG_I;
 447                         break;
 448                 case (MAN_RI):
 449                         fp = i % 2 ? TAG_I : TAG_MAX;
 450                         break;
 451                 case (MAN_IR):
 452                         fp = i % 2 ? TAG_MAX : TAG_I;
 453                         break;
 454                 case (MAN_BR):
 455                         fp = i % 2 ? TAG_MAX : TAG_B;
 456                         break;
 457                 case (MAN_RB):
 458                         fp = i % 2 ? TAG_B : TAG_MAX;
 459                         break;
 460                 default:
 461                         abort();
 462                         /* NOTREACHED */
 463                 }
 464
 465                 if (i)
 466                         h->flags |= HTML_NOSPACE;
 467
 468                 if (TAG_MAX != fp)
 469                         t = print_otag(h, fp, 0, NULL);
 470
 471                 print_man_node(m, nn, mh, h);
 472
 473                 if (t)
 474                         print_tagq(h, t);
 475         }
 476
 477         if (savelit)
 478                 mh->fl |= MANH_LITERAL;
 479
 480         return(0);
 481 }
 482
 483 /* ARGSUSED */
 484 static int
 485 man_SM_pre(MAN_ARGS)
 486 {
 487
 488         print_otag(h, TAG_SMALL, 0, NULL);
 489         if (MAN_SB == n->tok)
 490                 print_otag(h, TAG_B, 0, NULL);
 491         return(1);
 492 }
 493
 494 /* ARGSUSED */
 495 static int
 496 man_SS_pre(MAN_ARGS)
 497 {
 498         struct htmlpair  tag;
 499
 500         if (MAN_BLOCK == n->type) {
 501                 mh->fl &= ~MANH_LITERAL;
 502                 PAIR_CLASS_INIT(&tag, "subsection");
 503                 print_otag(h, TAG_DIV, 1, &tag);
 504                 return(1);
 505         } else if (MAN_BODY == n->type)
 506                 return(1);
 507
 508         print_otag(h, TAG_H2, 0, NULL);
 509         return(1);
 510 }
 511
 512 /* ARGSUSED */
 513 static int
 514 man_PP_pre(MAN_ARGS)
 515 {
 516
 517         if (MAN_HEAD == n->type)
 518                 return(0);
 519         else if (MAN_BLOCK == n->type)
 520                 print_bvspace(h, n);
 521
 522         return(1);
 523 }
 524
 525 /* ARGSUSED */
 526 static int
 527 man_IP_pre(MAN_ARGS)
 528 {
 529         const struct man_node   *nn;
 530
 531         if (MAN_BODY == n->type) {
 532                 print_otag(h, TAG_DD, 0, NULL);
 533                 return(1);
 534         } else if (MAN_HEAD != n->type) {
 535                 print_otag(h, TAG_DL, 0, NULL);
 536                 return(1);
 537         }
 538
 539         /* FIXME: width specification. */
 540
 541         print_otag(h, TAG_DT, 0, NULL);
 542
 543         /* For IP, only print the first header element. */
 544
 545         if (MAN_IP == n->tok && n->child)
 546                 print_man_node(m, n->child, mh, h);
 547
 548         /* For TP, only print next-line header elements. */
 549
 550         if (MAN_TP == n->tok)
 551                 for (nn = n->child; nn; nn = nn->next)
 552                         if (nn->line > n->line)
 553                                 print_man_node(m, nn, mh, h);
 554
 555         return(0);
 556 }
 557
 558 /* ARGSUSED */
 559 static int
 560 man_HP_pre(MAN_ARGS)
 561 {
 562         struct htmlpair  tag;
 563         struct roffsu    su;
 564         const struct man_node *np;
 565
 566         if (MAN_HEAD == n->type)
 567                 return(0);
 568         else if (MAN_BLOCK != n->type)
 569                 return(1);
 570
 571         np = n->head->child;
 572
 573         if (NULL == np || ! a2width(np, &su))
 574                 SCALE_HS_INIT(&su, INDENT);
 575
 576         bufinit(h);
 577
 578         print_bvspace(h, n);
 579         bufcat_su(h, "margin-left", &su);
 580         su.scale = -su.scale;
 581         bufcat_su(h, "text-indent", &su);
 582         PAIR_STYLE_INIT(&tag, h);
 583         print_otag(h, TAG_P, 1, &tag);
 584         return(1);
 585 }
 586
 587 /* ARGSUSED */
 588 static int
 589 man_OP_pre(MAN_ARGS)
 590 {
 591         struct tag      *tt;
 592         struct htmlpair  tag;
 593
 594         print_text(h, "[");
 595         h->flags |= HTML_NOSPACE;
 596         PAIR_CLASS_INIT(&tag, "opt");
 597         tt = print_otag(h, TAG_SPAN, 1, &tag);
 598
 599         if (NULL != (n = n->child)) {
 600                 print_otag(h, TAG_B, 0, NULL);
 601                 print_text(h, n->string);
 602         }
 603
 604         print_stagq(h, tt);
 605
 606         if (NULL != n && NULL != n->next) {
 607                 print_otag(h, TAG_I, 0, NULL);
 608                 print_text(h, n->next->string);
 609         }
 610
 611         print_stagq(h, tt);
 612         h->flags |= HTML_NOSPACE;
 613         print_text(h, "]");
 614         return(0);
 615 }
 616
 617
 618 /* ARGSUSED */
 619 static int
 620 man_B_pre(MAN_ARGS)
 621 {
 622
 623         print_otag(h, TAG_B, 0, NULL);
 624         return(1);
 625 }
 626
 627 /* ARGSUSED */
 628 static int
 629 man_I_pre(MAN_ARGS)
 630 {
 631
 632         print_otag(h, TAG_I, 0, NULL);
 633         return(1);
 634 }
 635
 636 /* ARGSUSED */
 637 static int
 638 man_literal_pre(MAN_ARGS)
 639 {
 640
 641         if (MAN_nf != n->tok) {
 642                 print_otag(h, TAG_BR, 0, NULL);
 643                 mh->fl &= ~MANH_LITERAL;
 644         } else
 645                 mh->fl |= MANH_LITERAL;
 646
 647         return(0);
 648 }
 649
 650 /* ARGSUSED */
 651 static int
 652 man_in_pre(MAN_ARGS)
 653 {
 654
 655         print_otag(h, TAG_BR, 0, NULL);
 656         return(0);
 657 }
 658
 659 /* ARGSUSED */
 660 static int
 661 man_ign_pre(MAN_ARGS)
 662 {
 663
 664         return(0);
 665 }
 666
 667 /* ARGSUSED */
 668 static int
 669 man_RS_pre(MAN_ARGS)
 670 {
 671         struct htmlpair  tag;
 672         struct roffsu    su;
 673
 674         if (MAN_HEAD == n->type)
 675                 return(0);
 676         else if (MAN_BODY == n->type)
 677                 return(1);
 678
 679         SCALE_HS_INIT(&su, INDENT);
 680         if (n->head->child)
 681                 a2width(n->head->child, &su);
 682
 683         bufinit(h);
 684         bufcat_su(h, "margin-left", &su);
 685         PAIR_STYLE_INIT(&tag, h);
 686         print_otag(h, TAG_DIV, 1, &tag);
 687         return(1);
 688 }