contrib/mdocml/man_html.c

   1 /*      $Id: man_html.c,v 1.96 2014/08/01 19:25:52 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2013, 2014 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 AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21
  22 #include <sys/types.h>
  23
  24 #include <assert.h>
  25 #include <ctype.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "mandoc.h"
  31 #include "mandoc_aux.h"
  32 #include "out.h"
  33 #include "html.h"
  34 #include "man.h"
  35 #include "main.h"
  36
  37 /* TODO: preserve ident widths. */
  38 /* FIXME: have PD set the default vspace width. */
  39
  40 #define INDENT            5
  41
  42 #define MAN_ARGS          const struct man_meta *man, \
  43                           const struct man_node *n, \
  44                           struct mhtml *mh, \
  45                           struct html *h
  46
  47 struct  mhtml {
  48         int               fl;
  49 #define MANH_LITERAL     (1 << 0) /* literal context */
  50 };
  51
  52 struct  htmlman {
  53         int             (*pre)(MAN_ARGS);
  54         int             (*post)(MAN_ARGS);
  55 };
  56
  57 static  void              print_bvspace(struct html *,
  58                                 const struct man_node *);
  59 static  void              print_man(MAN_ARGS);
  60 static  void              print_man_head(MAN_ARGS);
  61 static  void              print_man_nodelist(MAN_ARGS);
  62 static  void              print_man_node(MAN_ARGS);
  63 static  int               a2width(const struct man_node *,
  64                                 struct roffsu *);
  65 static  int               man_B_pre(MAN_ARGS);
  66 static  int               man_HP_pre(MAN_ARGS);
  67 static  int               man_IP_pre(MAN_ARGS);
  68 static  int               man_I_pre(MAN_ARGS);
  69 static  int               man_OP_pre(MAN_ARGS);
  70 static  int               man_PP_pre(MAN_ARGS);
  71 static  int               man_RS_pre(MAN_ARGS);
  72 static  int               man_SH_pre(MAN_ARGS);
  73 static  int               man_SM_pre(MAN_ARGS);
  74 static  int               man_SS_pre(MAN_ARGS);
  75 static  int               man_UR_pre(MAN_ARGS);
  76 static  int               man_alt_pre(MAN_ARGS);
  77 static  int               man_br_pre(MAN_ARGS);
  78 static  int               man_ign_pre(MAN_ARGS);
  79 static  int               man_in_pre(MAN_ARGS);
  80 static  int               man_literal_pre(MAN_ARGS);
  81 static  void              man_root_post(MAN_ARGS);
  82 static  void              man_root_pre(MAN_ARGS);
  83
  84 static  const struct htmlman mans[MAN_MAX] = {
  85         { man_br_pre, NULL }, /* br */
  86         { NULL, NULL }, /* TH */
  87         { man_SH_pre, NULL }, /* SH */
  88         { man_SS_pre, NULL }, /* SS */
  89         { man_IP_pre, NULL }, /* TP */
  90         { man_PP_pre, NULL }, /* LP */
  91         { man_PP_pre, NULL }, /* PP */
  92         { man_PP_pre, NULL }, /* P */
  93         { man_IP_pre, NULL }, /* IP */
  94         { man_HP_pre, NULL }, /* HP */
  95         { man_SM_pre, NULL }, /* SM */
  96         { man_SM_pre, NULL }, /* SB */
  97         { man_alt_pre, NULL }, /* BI */
  98         { man_alt_pre, NULL }, /* IB */
  99         { man_alt_pre, NULL }, /* BR */
 100         { man_alt_pre, NULL }, /* RB */
 101         { NULL, NULL }, /* R */
 102         { man_B_pre, NULL }, /* B */
 103         { man_I_pre, NULL }, /* I */
 104         { man_alt_pre, NULL }, /* IR */
 105         { man_alt_pre, NULL }, /* RI */
 106         { man_ign_pre, NULL }, /* na */
 107         { man_br_pre, NULL }, /* sp */
 108         { man_literal_pre, NULL }, /* nf */
 109         { man_literal_pre, NULL }, /* fi */
 110         { NULL, NULL }, /* RE */
 111         { man_RS_pre, NULL }, /* RS */
 112         { man_ign_pre, NULL }, /* DT */
 113         { man_ign_pre, NULL }, /* UC */
 114         { man_ign_pre, NULL }, /* PD */
 115         { man_ign_pre, NULL }, /* AT */
 116         { man_in_pre, NULL }, /* in */
 117         { man_ign_pre, NULL }, /* ft */
 118         { man_OP_pre, NULL }, /* OP */
 119         { man_literal_pre, NULL }, /* EX */
 120         { man_literal_pre, NULL }, /* EE */
 121         { man_UR_pre, NULL }, /* UR */
 122         { NULL, NULL }, /* UE */
 123         { man_ign_pre, NULL }, /* ll */
 124 };
 125
 126
 127 /*
 128  * Printing leading vertical space before a block.
 129  * This is used for the paragraph macros.
 130  * The rules are pretty simple, since there's very little nesting going
 131  * on here.  Basically, if we're the first within another block (SS/SH),
 132  * then don't emit vertical space.  If we are (RS), then do.  If not the
 133  * first, print it.
 134  */
 135 static void
 136 print_bvspace(struct html *h, const struct man_node *n)
 137 {
 138
 139         if (n->body && n->body->child)
 140                 if (MAN_TBL == n->body->child->type)
 141                         return;
 142
 143         if (MAN_ROOT == n->parent->type || MAN_RS != n->parent->tok)
 144                 if (NULL == n->prev)
 145                         return;
 146
 147         print_otag(h, TAG_P, 0, NULL);
 148 }
 149
 150 void
 151 html_man(void *arg, const struct man *man)
 152 {
 153         struct mhtml     mh;
 154
 155         memset(&mh, 0, sizeof(struct mhtml));
 156         print_man(man_meta(man), man_node(man), &mh, (struct html *)arg);
 157         putchar('\n');
 158 }
 159
 160 static void
 161 print_man(MAN_ARGS)
 162 {
 163         struct tag      *t, *tt;
 164         struct htmlpair  tag;
 165
 166         PAIR_CLASS_INIT(&tag, "mandoc");
 167
 168         if ( ! (HTML_FRAGMENT & h->oflags)) {
 169                 print_gen_decls(h);
 170                 t = print_otag(h, TAG_HTML, 0, NULL);
 171                 tt = print_otag(h, TAG_HEAD, 0, NULL);
 172                 print_man_head(man, n, mh, h);
 173                 print_tagq(h, tt);
 174                 print_otag(h, TAG_BODY, 0, NULL);
 175                 print_otag(h, TAG_DIV, 1, &tag);
 176         } else
 177                 t = print_otag(h, TAG_DIV, 1, &tag);
 178
 179         print_man_nodelist(man, n, mh, h);
 180         print_tagq(h, t);
 181 }
 182
 183 static void
 184 print_man_head(MAN_ARGS)
 185 {
 186
 187         print_gen_head(h);
 188         assert(man->title);
 189         assert(man->msec);
 190         bufcat_fmt(h, "%s(%s)", man->title, man->msec);
 191         print_otag(h, TAG_TITLE, 0, NULL);
 192         print_text(h, h->buf);
 193 }
 194
 195 static void
 196 print_man_nodelist(MAN_ARGS)
 197 {
 198
 199         print_man_node(man, n, mh, h);
 200         if (n->next)
 201                 print_man_nodelist(man, n->next, mh, h);
 202 }
 203
 204 static void
 205 print_man_node(MAN_ARGS)
 206 {
 207         int              child;
 208         struct tag      *t;
 209
 210         child = 1;
 211         t = h->tags.head;
 212
 213         switch (n->type) {
 214         case MAN_ROOT:
 215                 man_root_pre(man, n, mh, h);
 216                 break;
 217         case MAN_TEXT:
 218                 /*
 219                  * If we have a blank line, output a vertical space.
 220                  * If we have a space as the first character, break
 221                  * before printing the line's data.
 222                  */
 223                 if ('\0' == *n->string) {
 224                         print_otag(h, TAG_P, 0, NULL);
 225                         return;
 226                 }
 227
 228                 if (' ' == *n->string && MAN_LINE & n->flags)
 229                         print_otag(h, TAG_BR, 0, NULL);
 230                 else if (MANH_LITERAL & mh->fl && n->prev)
 231                         print_otag(h, TAG_BR, 0, NULL);
 232
 233                 print_text(h, n->string);
 234                 return;
 235         case MAN_EQN:
 236                 print_eqn(h, n->eqn);
 237                 break;
 238         case MAN_TBL:
 239                 /*
 240                  * This will take care of initialising all of the table
 241                  * state data for the first table, then tearing it down
 242                  * for the last one.
 243                  */
 244                 print_tbl(h, n->span);
 245                 return;
 246         default:
 247                 /*
 248                  * Close out scope of font prior to opening a macro
 249                  * scope.
 250                  */
 251                 if (HTMLFONT_NONE != h->metac) {
 252                         h->metal = h->metac;
 253                         h->metac = HTMLFONT_NONE;
 254                 }
 255
 256                 /*
 257                  * Close out the current table, if it's open, and unset
 258                  * the "meta" table state.  This will be reopened on the
 259                  * next table element.
 260                  */
 261                 if (h->tblt) {
 262                         print_tblclose(h);
 263                         t = h->tags.head;
 264                 }
 265                 if (mans[n->tok].pre)
 266                         child = (*mans[n->tok].pre)(man, n, mh, h);
 267                 break;
 268         }
 269
 270         if (child && n->child)
 271                 print_man_nodelist(man, n->child, mh, h);
 272
 273         /* This will automatically close out any font scope. */
 274         print_stagq(h, t);
 275
 276         switch (n->type) {
 277         case MAN_ROOT:
 278                 man_root_post(man, n, mh, h);
 279                 break;
 280         case MAN_EQN:
 281                 break;
 282         default:
 283                 if (mans[n->tok].post)
 284                         (*mans[n->tok].post)(man, n, mh, h);
 285                 break;
 286         }
 287 }
 288
 289 static int
 290 a2width(const struct man_node *n, struct roffsu *su)
 291 {
 292
 293         if (MAN_TEXT != n->type)
 294                 return(0);
 295         if (a2roffsu(n->string, su, SCALE_BU))
 296                 return(1);
 297
 298         return(0);
 299 }
 300
 301 static void
 302 man_root_pre(MAN_ARGS)
 303 {
 304         struct htmlpair  tag[3];
 305         struct tag      *t, *tt;
 306         char            *title;
 307
 308         assert(man->title);
 309         assert(man->msec);
 310         mandoc_asprintf(&title, "%s(%s)", man->title, man->msec);
 311
 312         PAIR_SUMMARY_INIT(&tag[0], "Document Header");
 313         PAIR_CLASS_INIT(&tag[1], "head");
 314         PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 315         t = print_otag(h, TAG_TABLE, 3, tag);
 316         PAIR_INIT(&tag[0], ATTR_WIDTH, "30%");
 317         print_otag(h, TAG_COL, 1, tag);
 318         print_otag(h, TAG_COL, 1, tag);
 319         print_otag(h, TAG_COL, 1, tag);
 320
 321         print_otag(h, TAG_TBODY, 0, NULL);
 322
 323         tt = print_otag(h, TAG_TR, 0, NULL);
 324
 325         PAIR_CLASS_INIT(&tag[0], "head-ltitle");
 326         print_otag(h, TAG_TD, 1, tag);
 327         print_text(h, title);
 328         print_stagq(h, tt);
 329
 330         PAIR_CLASS_INIT(&tag[0], "head-vol");
 331         PAIR_INIT(&tag[1], ATTR_ALIGN, "center");
 332         print_otag(h, TAG_TD, 2, tag);
 333         if (NULL != man->vol)
 334                 print_text(h, man->vol);
 335         print_stagq(h, tt);
 336
 337         PAIR_CLASS_INIT(&tag[0], "head-rtitle");
 338         PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 339         print_otag(h, TAG_TD, 2, tag);
 340         print_text(h, title);
 341         print_tagq(h, t);
 342         free(title);
 343 }
 344
 345 static void
 346 man_root_post(MAN_ARGS)
 347 {
 348         struct htmlpair  tag[3];
 349         struct tag      *t, *tt;
 350
 351         PAIR_SUMMARY_INIT(&tag[0], "Document Footer");
 352         PAIR_CLASS_INIT(&tag[1], "foot");
 353         PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 354         t = print_otag(h, TAG_TABLE, 3, tag);
 355         PAIR_INIT(&tag[0], ATTR_WIDTH, "50%");
 356         print_otag(h, TAG_COL, 1, tag);
 357         print_otag(h, TAG_COL, 1, tag);
 358
 359         tt = print_otag(h, TAG_TR, 0, NULL);
 360
 361         PAIR_CLASS_INIT(&tag[0], "foot-date");
 362         print_otag(h, TAG_TD, 1, tag);
 363
 364         assert(man->date);
 365         print_text(h, man->date);
 366         print_stagq(h, tt);
 367
 368         PAIR_CLASS_INIT(&tag[0], "foot-os");
 369         PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 370         print_otag(h, TAG_TD, 2, tag);
 371
 372         if (man->source)
 373                 print_text(h, man->source);
 374         print_tagq(h, t);
 375 }
 376
 377
 378 static int
 379 man_br_pre(MAN_ARGS)
 380 {
 381         struct roffsu    su;
 382         struct htmlpair  tag;
 383
 384         SCALE_VS_INIT(&su, 1);
 385
 386         if (MAN_sp == n->tok) {
 387                 if (NULL != (n = n->child))
 388                         if ( ! a2roffsu(n->string, &su, SCALE_VS))
 389                                 SCALE_VS_INIT(&su, atoi(n->string));
 390         } else
 391                 su.scale = 0.0;
 392
 393         bufinit(h);
 394         bufcat_su(h, "height", &su);
 395         PAIR_STYLE_INIT(&tag, h);
 396         print_otag(h, TAG_DIV, 1, &tag);
 397
 398         /* So the div isn't empty: */
 399         print_text(h, "\\~");
 400
 401         return(0);
 402 }
 403
 404 static int
 405 man_SH_pre(MAN_ARGS)
 406 {
 407         struct htmlpair  tag;
 408
 409         if (MAN_BLOCK == n->type) {
 410                 mh->fl &= ~MANH_LITERAL;
 411                 PAIR_CLASS_INIT(&tag, "section");
 412                 print_otag(h, TAG_DIV, 1, &tag);
 413                 return(1);
 414         } else if (MAN_BODY == n->type)
 415                 return(1);
 416
 417         print_otag(h, TAG_H1, 0, NULL);
 418         return(1);
 419 }
 420
 421 static int
 422 man_alt_pre(MAN_ARGS)
 423 {
 424         const struct man_node   *nn;
 425         int              i, savelit;
 426         enum htmltag     fp;
 427         struct tag      *t;
 428
 429         if ((savelit = mh->fl & MANH_LITERAL))
 430                 print_otag(h, TAG_BR, 0, NULL);
 431
 432         mh->fl &= ~MANH_LITERAL;
 433
 434         for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
 435                 t = NULL;
 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                         /* NOTREACHED */
 458                 }
 459
 460                 if (i)
 461                         h->flags |= HTML_NOSPACE;
 462
 463                 if (TAG_MAX != fp)
 464                         t = print_otag(h, fp, 0, NULL);
 465
 466                 print_man_node(man, nn, mh, h);
 467
 468                 if (t)
 469                         print_tagq(h, t);
 470         }
 471
 472         if (savelit)
 473                 mh->fl |= MANH_LITERAL;
 474
 475         return(0);
 476 }
 477
 478 static int
 479 man_SM_pre(MAN_ARGS)
 480 {
 481
 482         print_otag(h, TAG_SMALL, 0, NULL);
 483         if (MAN_SB == n->tok)
 484                 print_otag(h, TAG_B, 0, NULL);
 485         return(1);
 486 }
 487
 488 static int
 489 man_SS_pre(MAN_ARGS)
 490 {
 491         struct htmlpair  tag;
 492
 493         if (MAN_BLOCK == n->type) {
 494                 mh->fl &= ~MANH_LITERAL;
 495                 PAIR_CLASS_INIT(&tag, "subsection");
 496                 print_otag(h, TAG_DIV, 1, &tag);
 497                 return(1);
 498         } else if (MAN_BODY == n->type)
 499                 return(1);
 500
 501         print_otag(h, TAG_H2, 0, NULL);
 502         return(1);
 503 }
 504
 505 static int
 506 man_PP_pre(MAN_ARGS)
 507 {
 508
 509         if (MAN_HEAD == n->type)
 510                 return(0);
 511         else if (MAN_BLOCK == n->type)
 512                 print_bvspace(h, n);
 513
 514         return(1);
 515 }
 516
 517 static int
 518 man_IP_pre(MAN_ARGS)
 519 {
 520         const struct man_node   *nn;
 521
 522         if (MAN_BODY == n->type) {
 523                 print_otag(h, TAG_DD, 0, NULL);
 524                 return(1);
 525         } else if (MAN_HEAD != n->type) {
 526                 print_otag(h, TAG_DL, 0, NULL);
 527                 return(1);
 528         }
 529
 530         /* FIXME: width specification. */
 531
 532         print_otag(h, TAG_DT, 0, NULL);
 533
 534         /* For IP, only print the first header element. */
 535
 536         if (MAN_IP == n->tok && n->child)
 537                 print_man_node(man, n->child, mh, h);
 538
 539         /* For TP, only print next-line header elements. */
 540
 541         if (MAN_TP == n->tok) {
 542                 nn = n->child;
 543                 while (NULL != nn && 0 == (MAN_LINE & nn->flags))
 544                         nn = nn->next;
 545                 while (NULL != nn) {
 546                         print_man_node(man, nn, mh, h);
 547                         nn = nn->next;
 548                 }
 549         }
 550
 551         return(0);
 552 }
 553
 554 static int
 555 man_HP_pre(MAN_ARGS)
 556 {
 557         struct htmlpair  tag;
 558         struct roffsu    su;
 559         const struct man_node *np;
 560
 561         if (MAN_HEAD == n->type)
 562                 return(0);
 563         else if (MAN_BLOCK != n->type)
 564                 return(1);
 565
 566         np = n->head->child;
 567
 568         if (NULL == np || ! a2width(np, &su))
 569                 SCALE_HS_INIT(&su, INDENT);
 570
 571         bufinit(h);
 572
 573         print_bvspace(h, n);
 574         bufcat_su(h, "margin-left", &su);
 575         su.scale = -su.scale;
 576         bufcat_su(h, "text-indent", &su);
 577         PAIR_STYLE_INIT(&tag, h);
 578         print_otag(h, TAG_P, 1, &tag);
 579         return(1);
 580 }
 581
 582 static int
 583 man_OP_pre(MAN_ARGS)
 584 {
 585         struct tag      *tt;
 586         struct htmlpair  tag;
 587
 588         print_text(h, "[");
 589         h->flags |= HTML_NOSPACE;
 590         PAIR_CLASS_INIT(&tag, "opt");
 591         tt = print_otag(h, TAG_SPAN, 1, &tag);
 592
 593         if (NULL != (n = n->child)) {
 594                 print_otag(h, TAG_B, 0, NULL);
 595                 print_text(h, n->string);
 596         }
 597
 598         print_stagq(h, tt);
 599
 600         if (NULL != n && NULL != n->next) {
 601                 print_otag(h, TAG_I, 0, NULL);
 602                 print_text(h, n->next->string);
 603         }
 604
 605         print_stagq(h, tt);
 606         h->flags |= HTML_NOSPACE;
 607         print_text(h, "]");
 608         return(0);
 609 }
 610
 611 static int
 612 man_B_pre(MAN_ARGS)
 613 {
 614
 615         print_otag(h, TAG_B, 0, NULL);
 616         return(1);
 617 }
 618
 619 static int
 620 man_I_pre(MAN_ARGS)
 621 {
 622
 623         print_otag(h, TAG_I, 0, NULL);
 624         return(1);
 625 }
 626
 627 static int
 628 man_literal_pre(MAN_ARGS)
 629 {
 630
 631         if (MAN_fi == n->tok || MAN_EE == n->tok) {
 632                 print_otag(h, TAG_BR, 0, NULL);
 633                 mh->fl &= ~MANH_LITERAL;
 634         } else
 635                 mh->fl |= MANH_LITERAL;
 636
 637         return(0);
 638 }
 639
 640 static int
 641 man_in_pre(MAN_ARGS)
 642 {
 643
 644         print_otag(h, TAG_BR, 0, NULL);
 645         return(0);
 646 }
 647
 648 static int
 649 man_ign_pre(MAN_ARGS)
 650 {
 651
 652         return(0);
 653 }
 654
 655 static int
 656 man_RS_pre(MAN_ARGS)
 657 {
 658         struct htmlpair  tag;
 659         struct roffsu    su;
 660
 661         if (MAN_HEAD == n->type)
 662                 return(0);
 663         else if (MAN_BODY == n->type)
 664                 return(1);
 665
 666         SCALE_HS_INIT(&su, INDENT);
 667         if (n->head->child)
 668                 a2width(n->head->child, &su);
 669
 670         bufinit(h);
 671         bufcat_su(h, "margin-left", &su);
 672         PAIR_STYLE_INIT(&tag, h);
 673         print_otag(h, TAG_DIV, 1, &tag);
 674         return(1);
 675 }
 676
 677 static int
 678 man_UR_pre(MAN_ARGS)
 679 {
 680         struct htmlpair          tag[2];
 681
 682         n = n->child;
 683         assert(MAN_HEAD == n->type);
 684         if (n->nchild) {
 685                 assert(MAN_TEXT == n->child->type);
 686                 PAIR_CLASS_INIT(&tag[0], "link-ext");
 687                 PAIR_HREF_INIT(&tag[1], n->child->string);
 688                 print_otag(h, TAG_A, 2, tag);
 689         }
 690
 691         assert(MAN_BODY == n->next->type);
 692         if (n->next->nchild)
 693                 n = n->next;
 694
 695         print_man_nodelist(man, n->child, mh, h);
 696
 697         return(0);
 698 }