man_html.c

   1 /*      $Id: man_html.c,v 1.75 2011/06/29 15:38:09 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 #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_bvspace(struct html *,
  57                                 const struct man_node *);
  58 static  void              print_man(MAN_ARGS);
  59 static  void              print_man_head(MAN_ARGS);
  60 static  void              print_man_nodelist(MAN_ARGS);
  61 static  void              print_man_node(MAN_ARGS);
  62
  63 static  int               a2width(const struct man_node *,
  64                                 struct roffsu *);
  65
  66 static  int               man_alt_pre(MAN_ARGS);
  67 static  int               man_br_pre(MAN_ARGS);
  68 static  int               man_ign_pre(MAN_ARGS);
  69 static  int               man_in_pre(MAN_ARGS);
  70 static  int               man_literal_pre(MAN_ARGS);
  71 static  void              man_root_post(MAN_ARGS);
  72 static  void              man_root_pre(MAN_ARGS);
  73 static  int               man_B_pre(MAN_ARGS);
  74 static  int               man_HP_pre(MAN_ARGS);
  75 static  int               man_I_pre(MAN_ARGS);
  76 static  int               man_IP_pre(MAN_ARGS);
  77 static  int               man_PP_pre(MAN_ARGS);
  78 static  int               man_RS_pre(MAN_ARGS);
  79 static  int               man_SH_pre(MAN_ARGS);
  80 static  int               man_SM_pre(MAN_ARGS);
  81 static  int               man_SS_pre(MAN_ARGS);
  82
  83 static  const struct htmlman mans[MAN_MAX] = {
  84         { man_br_pre, NULL }, /* br */
  85         { NULL, NULL }, /* TH */
  86         { man_SH_pre, NULL }, /* SH */
  87         { man_SS_pre, NULL }, /* SS */
  88         { man_IP_pre, NULL }, /* TP */
  89         { man_PP_pre, NULL }, /* LP */
  90         { man_PP_pre, NULL }, /* PP */
  91         { man_PP_pre, NULL }, /* P */
  92         { man_IP_pre, NULL }, /* IP */
  93         { man_HP_pre, NULL }, /* HP */
  94         { man_SM_pre, NULL }, /* SM */
  95         { man_SM_pre, NULL }, /* SB */
  96         { man_alt_pre, NULL }, /* BI */
  97         { man_alt_pre, NULL }, /* IB */
  98         { man_alt_pre, NULL }, /* BR */
  99         { man_alt_pre, NULL }, /* RB */
 100         { NULL, NULL }, /* R */
 101         { man_B_pre, NULL }, /* B */
 102         { man_I_pre, NULL }, /* I */
 103         { man_alt_pre, NULL }, /* IR */
 104         { man_alt_pre, NULL }, /* RI */
 105         { man_ign_pre, NULL }, /* na */
 106         { man_br_pre, NULL }, /* sp */
 107         { man_literal_pre, NULL }, /* nf */
 108         { man_literal_pre, NULL }, /* fi */
 109         { NULL, NULL }, /* RE */
 110         { man_RS_pre, NULL }, /* RS */
 111         { man_ign_pre, NULL }, /* DT */
 112         { man_ign_pre, NULL }, /* UC */
 113         { man_ign_pre, NULL }, /* PD */
 114         { man_ign_pre, NULL }, /* AT */
 115         { man_in_pre, NULL }, /* in */
 116         { man_ign_pre, NULL }, /* ft */
 117 };
 118
 119 /*
 120  * Printing leading vertical space before a block.
 121  * This is used for the paragraph macros.
 122  * The rules are pretty simple, since there's very little nesting going
 123  * on here.  Basically, if we're the first within another block (SS/SH),
 124  * then don't emit vertical space.  If we are (RS), then do.  If not the
 125  * first, print it.
 126  */
 127 static void
 128 print_bvspace(struct html *h, const struct man_node *n)
 129 {
 130
 131         if (n->body && n->body->child)
 132                 if (MAN_TBL == n->body->child->type)
 133                         return;
 134
 135         if (MAN_ROOT == n->parent->type || MAN_RS != n->parent->tok)
 136                 if (NULL == n->prev)
 137                         return;
 138
 139         print_otag(h, TAG_P, 0, NULL);
 140 }
 141
 142 void
 143 html_man(void *arg, const struct man *m)
 144 {
 145         struct html     *h;
 146         struct tag      *t;
 147         struct mhtml     mh;
 148
 149         h = (struct html *)arg;
 150
 151         print_gen_decls(h);
 152
 153         memset(&mh, 0, sizeof(struct mhtml));
 154
 155         t = print_otag(h, TAG_HTML, 0, NULL);
 156         print_man(man_meta(m), man_node(m), &mh, h);
 157         print_tagq(h, t);
 158
 159         printf("\n");
 160 }
 161
 162 static void
 163 print_man(MAN_ARGS)
 164 {
 165         struct tag      *t;
 166
 167         t = print_otag(h, TAG_HEAD, 0, NULL);
 168         print_man_head(m, n, mh, h);
 169         print_tagq(h, t);
 170
 171         t = print_otag(h, TAG_BODY, 0, NULL);
 172         print_man_nodelist(m, n, mh, h);
 173         print_tagq(h, t);
 174 }
 175
 176
 177 /* ARGSUSED */
 178 static void
 179 print_man_head(MAN_ARGS)
 180 {
 181
 182         print_gen_head(h);
 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         struct htmlpair  tag;
 205
 206         child = 1;
 207         t = h->tags.head;
 208
 209         switch (n->type) {
 210         case (MAN_ROOT):
 211                 man_root_pre(m, n, mh, h);
 212                 break;
 213         case (MAN_TEXT):
 214                 /*
 215                  * If we have a blank line, output a vertical space.
 216                  * If we have a space as the first character, break
 217                  * before printing the line's data.
 218                  */
 219                 if ('\0' == *n->string) {
 220                         print_otag(h, TAG_P, 0, NULL);
 221                         return;
 222                 } else if (' ' == *n->string && MAN_LINE & n->flags)
 223                         print_otag(h, TAG_BR, 0, NULL);
 224
 225                 print_text(h, n->string);
 226
 227                 /*
 228                  * If we're in a literal context, make sure that words
 229                  * togehter on the same line stay together.  This is a
 230                  * POST-printing call, so we check the NEXT word.  Since
 231                  * -man doesn't have nested macros, we don't need to be
 232                  * more specific than this.
 233                  */
 234                 if (MANH_LITERAL & mh->fl &&
 235                                 (NULL == n->next ||
 236                                  n->next->line > n->line))
 237                         print_otag(h, TAG_BR, 0, NULL);
 238                 return;
 239         case (MAN_EQN):
 240                 PAIR_CLASS_INIT(&tag, "eqn");
 241                 print_otag(h, TAG_SPAN, 1, &tag);
 242                 print_text(h, n->eqn->data);
 243                 break;
 244         case (MAN_TBL):
 245                 /*
 246                  * This will take care of initialising all of the table
 247                  * state data for the first table, then tearing it down
 248                  * for the last one.
 249                  */
 250                 print_tbl(h, n->span);
 251                 return;
 252         default:
 253                 /*
 254                  * Close out scope of font prior to opening a macro
 255                  * scope.
 256                  */
 257                 if (HTMLFONT_NONE != h->metac) {
 258                         h->metal = h->metac;
 259                         h->metac = HTMLFONT_NONE;
 260                 }
 261
 262                 /*
 263                  * Close out the current table, if it's open, and unset
 264                  * the "meta" table state.  This will be reopened on the
 265                  * next table element.
 266                  */
 267                 if (h->tblt) {
 268                         print_tblclose(h);
 269                         t = h->tags.head;
 270                 }
 271                 if (mans[n->tok].pre)
 272                         child = (*mans[n->tok].pre)(m, n, mh, h);
 273                 break;
 274         }
 275
 276         if (child && n->child)
 277                 print_man_nodelist(m, n->child, mh, h);
 278
 279         /* This will automatically close out any font scope. */
 280         print_stagq(h, t);
 281
 282         switch (n->type) {
 283         case (MAN_ROOT):
 284                 man_root_post(m, n, mh, h);
 285                 break;
 286         case (MAN_EQN):
 287                 break;
 288         default:
 289                 if (mans[n->tok].post)
 290                         (*mans[n->tok].post)(m, n, mh, h);
 291                 break;
 292         }
 293 }
 294
 295
 296 static int
 297 a2width(const struct man_node *n, struct roffsu *su)
 298 {
 299
 300         if (MAN_TEXT != n->type)
 301                 return(0);
 302         if (a2roffsu(n->string, su, SCALE_BU))
 303                 return(1);
 304
 305         return(0);
 306 }
 307
 308
 309 /* ARGSUSED */
 310 static void
 311 man_root_pre(MAN_ARGS)
 312 {
 313         struct htmlpair  tag[3];
 314         struct tag      *t, *tt;
 315         char             b[BUFSIZ], title[BUFSIZ];
 316
 317         b[0] = 0;
 318         if (m->vol)
 319                 (void)strlcat(b, m->vol, BUFSIZ);
 320
 321         snprintf(title, BUFSIZ - 1, "%s(%s)", m->title, m->msec);
 322
 323         PAIR_SUMMARY_INIT(&tag[0], "Document Header");
 324         PAIR_CLASS_INIT(&tag[1], "head");
 325         if (NULL == h->style) {
 326                 PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 327                 t = print_otag(h, TAG_TABLE, 3, tag);
 328                 PAIR_INIT(&tag[0], ATTR_WIDTH, "30%");
 329                 print_otag(h, TAG_COL, 1, tag);
 330                 print_otag(h, TAG_COL, 1, tag);
 331                 print_otag(h, TAG_COL, 1, tag);
 332         } else
 333                 t = print_otag(h, TAG_TABLE, 2, tag);
 334
 335         print_otag(h, TAG_TBODY, 0, NULL);
 336
 337         tt = print_otag(h, TAG_TR, 0, NULL);
 338
 339         PAIR_CLASS_INIT(&tag[0], "head-ltitle");
 340         print_otag(h, TAG_TD, 1, tag);
 341
 342         print_text(h, title);
 343         print_stagq(h, tt);
 344
 345         PAIR_CLASS_INIT(&tag[0], "head-vol");
 346         if (NULL == h->style) {
 347                 PAIR_INIT(&tag[1], ATTR_ALIGN, "center");
 348                 print_otag(h, TAG_TD, 2, tag);
 349         } else
 350                 print_otag(h, TAG_TD, 1, tag);
 351
 352         print_text(h, b);
 353         print_stagq(h, tt);
 354
 355         PAIR_CLASS_INIT(&tag[0], "head-rtitle");
 356         if (NULL == h->style) {
 357                 PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 358                 print_otag(h, TAG_TD, 2, tag);
 359         } else
 360                 print_otag(h, TAG_TD, 1, tag);
 361
 362         print_text(h, title);
 363         print_tagq(h, t);
 364 }
 365
 366
 367 /* ARGSUSED */
 368 static void
 369 man_root_post(MAN_ARGS)
 370 {
 371         struct htmlpair  tag[3];
 372         struct tag      *t, *tt;
 373
 374         PAIR_SUMMARY_INIT(&tag[0], "Document Footer");
 375         PAIR_CLASS_INIT(&tag[1], "foot");
 376         if (NULL == h->style) {
 377                 PAIR_INIT(&tag[2], ATTR_WIDTH, "100%");
 378                 t = print_otag(h, TAG_TABLE, 3, tag);
 379                 PAIR_INIT(&tag[0], ATTR_WIDTH, "50%");
 380                 print_otag(h, TAG_COL, 1, tag);
 381                 print_otag(h, TAG_COL, 1, tag);
 382         } else
 383                 t = print_otag(h, TAG_TABLE, 2, tag);
 384
 385         tt = print_otag(h, TAG_TR, 0, NULL);
 386
 387         PAIR_CLASS_INIT(&tag[0], "foot-date");
 388         print_otag(h, TAG_TD, 1, tag);
 389
 390         print_text(h, m->date);
 391         print_stagq(h, tt);
 392
 393         PAIR_CLASS_INIT(&tag[0], "foot-os");
 394         if (NULL == h->style) {
 395                 PAIR_INIT(&tag[1], ATTR_ALIGN, "right");
 396                 print_otag(h, TAG_TD, 2, tag);
 397         } else
 398                 print_otag(h, TAG_TD, 1, tag);
 399
 400         if (m->source)
 401                 print_text(h, m->source);
 402         print_tagq(h, t);
 403 }
 404
 405
 406
 407 /* ARGSUSED */
 408 static int
 409 man_br_pre(MAN_ARGS)
 410 {
 411         struct roffsu    su;
 412         struct htmlpair  tag;
 413
 414         SCALE_VS_INIT(&su, 1);
 415
 416         if (MAN_sp == n->tok) {
 417                 if (NULL != (n = n->child))
 418                         if ( ! a2roffsu(n->string, &su, SCALE_VS))
 419                                 SCALE_VS_INIT(&su, atoi(n->string));
 420         } else
 421                 su.scale = 0;
 422
 423         bufinit(h);
 424         bufcat_su(h, "height", &su);
 425         PAIR_STYLE_INIT(&tag, h);
 426         print_otag(h, TAG_DIV, 1, &tag);
 427
 428         /* So the div isn't empty: */
 429         print_text(h, "\\~");
 430
 431         return(0);
 432 }
 433
 434
 435 /* ARGSUSED */
 436 static int
 437 man_SH_pre(MAN_ARGS)
 438 {
 439         struct htmlpair  tag;
 440
 441         if (MAN_BLOCK == n->type) {
 442                 PAIR_CLASS_INIT(&tag, "section");
 443                 print_otag(h, TAG_DIV, 1, &tag);
 444                 return(1);
 445         } else if (MAN_BODY == n->type)
 446                 return(1);
 447
 448         print_otag(h, TAG_H1, 0, NULL);
 449         return(1);
 450 }
 451
 452
 453 /* ARGSUSED */
 454 static int
 455 man_alt_pre(MAN_ARGS)
 456 {
 457         const struct man_node   *nn;
 458         int              i;
 459         enum htmltag     fp;
 460         struct tag      *t;
 461
 462         for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
 463                 t = NULL;
 464                 switch (n->tok) {
 465                 case (MAN_BI):
 466                         fp = i % 2 ? TAG_I : TAG_B;
 467                         break;
 468                 case (MAN_IB):
 469                         fp = i % 2 ? TAG_B : TAG_I;
 470                         break;
 471                 case (MAN_RI):
 472                         fp = i % 2 ? TAG_I : TAG_MAX;
 473                         break;
 474                 case (MAN_IR):
 475                         fp = i % 2 ? TAG_MAX : TAG_I;
 476                         break;
 477                 case (MAN_BR):
 478                         fp = i % 2 ? TAG_MAX : TAG_B;
 479                         break;
 480                 case (MAN_RB):
 481                         fp = i % 2 ? TAG_B : TAG_MAX;
 482                         break;
 483                 default:
 484                         abort();
 485                         /* NOTREACHED */
 486                 }
 487
 488                 if (i)
 489                         h->flags |= HTML_NOSPACE;
 490
 491                 if (TAG_MAX != fp)
 492                         t = print_otag(h, fp, 0, NULL);
 493
 494                 print_man_node(m, nn, mh, h);
 495
 496                 if (t)
 497                         print_tagq(h, t);
 498         }
 499
 500         return(0);
 501 }
 502
 503
 504 /* ARGSUSED */
 505 static int
 506 man_SM_pre(MAN_ARGS)
 507 {
 508
 509         print_otag(h, TAG_SMALL, 0, NULL);
 510         if (MAN_SB == n->tok)
 511                 print_otag(h, TAG_B, 0, NULL);
 512         return(1);
 513 }
 514
 515
 516 /* ARGSUSED */
 517 static int
 518 man_SS_pre(MAN_ARGS)
 519 {
 520         struct htmlpair  tag;
 521
 522         if (MAN_BLOCK == n->type) {
 523                 PAIR_CLASS_INIT(&tag, "subsection");
 524                 print_otag(h, TAG_DIV, 1, &tag);
 525                 return(1);
 526         } else if (MAN_BODY == n->type)
 527                 return(1);
 528
 529         print_otag(h, TAG_H2, 0, NULL);
 530         return(1);
 531 }
 532
 533
 534 /* ARGSUSED */
 535 static int
 536 man_PP_pre(MAN_ARGS)
 537 {
 538
 539         if (MAN_HEAD == n->type)
 540                 return(0);
 541         else if (MAN_BLOCK == n->type)
 542                 print_bvspace(h, n);
 543
 544         return(1);
 545 }
 546
 547
 548 /* ARGSUSED */
 549 static int
 550 man_IP_pre(MAN_ARGS)
 551 {
 552         struct roffsu            su;
 553         struct htmlpair          tag;
 554         const struct man_node   *nn;
 555
 556         /*
 557          * This scattering of 1-BU margins and pads is to make sure that
 558          * when text overruns its box, the subsequent text isn't flush
 559          * up against it.  However, the rest of the right-hand box must
 560          * also be adjusted in consideration of this 1-BU space.
 561          */
 562
 563         if (MAN_BODY == n->type) {
 564                 print_otag(h, TAG_TD, 0, NULL);
 565                 return(1);
 566         }
 567
 568         nn = MAN_BLOCK == n->type ?
 569                 n->head->child : n->parent->head->child;
 570
 571         SCALE_HS_INIT(&su, INDENT);
 572
 573         /* Width is the second token. */
 574
 575         if (MAN_IP == n->tok && NULL != nn)
 576                 if (NULL != (nn = nn->next))
 577                         a2width(nn, &su);
 578
 579         /* Width is the first token. */
 580
 581         if (MAN_TP == n->tok && NULL != nn) {
 582                 /* Skip past non-text children. */
 583                 while (nn && MAN_TEXT != nn->type)
 584                         nn = nn->next;
 585                 if (nn)
 586                         a2width(nn, &su);
 587         }
 588
 589         if (MAN_BLOCK == n->type) {
 590                 print_bvspace(h, n);
 591                 print_otag(h, TAG_TABLE, 0, NULL);
 592                 bufinit(h);
 593                 bufcat_su(h, "width", &su);
 594                 PAIR_STYLE_INIT(&tag, h);
 595                 print_otag(h, TAG_COL, 1, &tag);
 596                 print_otag(h, TAG_COL, 0, NULL);
 597                 print_otag(h, TAG_TBODY, 0, NULL);
 598                 print_otag(h, TAG_TR, 0, NULL);
 599                 return(1);
 600         }
 601
 602         print_otag(h, TAG_TD, 0, NULL);
 603
 604         /* For IP, only print the first header element. */
 605
 606         if (MAN_IP == n->tok && n->child)
 607                 print_man_node(m, n->child, mh, h);
 608
 609         /* For TP, only print next-line header elements. */
 610
 611         if (MAN_TP == n->tok)
 612                 for (nn = n->child; nn; nn = nn->next)
 613                         if (nn->line > n->line)
 614                                 print_man_node(m, nn, mh, h);
 615
 616         return(0);
 617 }
 618
 619
 620 /* ARGSUSED */
 621 static int
 622 man_HP_pre(MAN_ARGS)
 623 {
 624         struct htmlpair  tag;
 625         struct roffsu    su;
 626         const struct man_node *np;
 627
 628         bufinit(h);
 629
 630         np = MAN_BLOCK == n->type ?
 631                 n->head->child :
 632                 n->parent->head->child;
 633
 634         if (NULL == np || ! a2width(np, &su))
 635                 SCALE_HS_INIT(&su, INDENT);
 636
 637         if (MAN_HEAD == n->type) {
 638                 print_otag(h, TAG_TD, 0, NULL);
 639                 return(0);
 640         } else if (MAN_BLOCK == n->type) {
 641                 print_bvspace(h, n);
 642                 print_otag(h, TAG_TABLE, 0, NULL);
 643                 bufcat_su(h, "width", &su);
 644                 PAIR_STYLE_INIT(&tag, h);
 645                 print_otag(h, TAG_COL, 1, &tag);
 646                 print_otag(h, TAG_COL, 0, NULL);
 647                 print_otag(h, TAG_TBODY, 0, NULL);
 648                 print_otag(h, TAG_TR, 0, NULL);
 649                 return(1);
 650         }
 651
 652         su.scale = -su.scale;
 653         bufcat_su(h, "text-indent", &su);
 654         PAIR_STYLE_INIT(&tag, h);
 655         print_otag(h, TAG_TD, 1, &tag);
 656         return(1);
 657 }
 658
 659
 660 /* ARGSUSED */
 661 static int
 662 man_B_pre(MAN_ARGS)
 663 {
 664
 665         print_otag(h, TAG_B, 0, NULL);
 666         return(1);
 667 }
 668
 669
 670 /* ARGSUSED */
 671 static int
 672 man_I_pre(MAN_ARGS)
 673 {
 674
 675         print_otag(h, TAG_I, 0, NULL);
 676         return(1);
 677 }
 678
 679
 680 /* ARGSUSED */
 681 static int
 682 man_literal_pre(MAN_ARGS)
 683 {
 684
 685         if (MAN_nf == n->tok) {
 686                 print_otag(h, TAG_BR, 0, NULL);
 687                 mh->fl |= MANH_LITERAL;
 688         } else
 689                 mh->fl &= ~MANH_LITERAL;
 690
 691         return(0);
 692 }
 693
 694
 695 /* ARGSUSED */
 696 static int
 697 man_in_pre(MAN_ARGS)
 698 {
 699
 700         print_otag(h, TAG_BR, 0, NULL);
 701         return(0);
 702 }
 703
 704
 705 /* ARGSUSED */
 706 static int
 707 man_ign_pre(MAN_ARGS)
 708 {
 709
 710         return(0);
 711 }
 712
 713
 714 /* ARGSUSED */
 715 static int
 716 man_RS_pre(MAN_ARGS)
 717 {
 718         struct htmlpair  tag;
 719         struct roffsu    su;
 720
 721         if (MAN_HEAD == n->type)
 722                 return(0);
 723         else if (MAN_BODY == n->type)
 724                 return(1);
 725
 726         SCALE_HS_INIT(&su, INDENT);
 727         if (n->head->child)
 728                 a2width(n->head->child, &su);
 729
 730         bufinit(h);
 731         bufcat_su(h, "margin-left", &su);
 732         PAIR_STYLE_INIT(&tag, h);
 733         print_otag(h, TAG_DIV, 1, &tag);
 734         return(1);
 735 }