man_term.c

   1 /*      $Id: man_term.c,v 1.140 2014/02/16 12:33:39 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010-2014 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 "out.h"
  32 #include "man.h"
  33 #include "term.h"
  34 #include "main.h"
  35
  36 #define MAXMARGINS        64 /* maximum number of indented scopes */
  37
  38 struct  mtermp {
  39         int               fl;
  40 #define MANT_LITERAL     (1 << 0)
  41         size_t            lmargin[MAXMARGINS]; /* margins (incl. visible page) */
  42         int               lmargincur; /* index of current margin */
  43         int               lmarginsz; /* actual number of nested margins */
  44         size_t            offset; /* default offset to visible page */
  45         int               pardist; /* vert. space before par., unit: [v] */
  46 };
  47
  48 #define DECL_ARGS         struct termp *p, \
  49                           struct mtermp *mt, \
  50                           const struct man_node *n, \
  51                           const struct man_meta *meta
  52
  53 struct  termact {
  54         int             (*pre)(DECL_ARGS);
  55         void            (*post)(DECL_ARGS);
  56         int               flags;
  57 #define MAN_NOTEXT       (1 << 0) /* Never has text children. */
  58 };
  59
  60 static  int               a2width(const struct termp *, const char *);
  61 static  size_t            a2height(const struct termp *, const char *);
  62
  63 static  void              print_man_nodelist(DECL_ARGS);
  64 static  void              print_man_node(DECL_ARGS);
  65 static  void              print_man_head(struct termp *, const void *);
  66 static  void              print_man_foot(struct termp *, const void *);
  67 static  void              print_bvspace(struct termp *,
  68                                 const struct man_node *, int);
  69
  70 static  int               pre_B(DECL_ARGS);
  71 static  int               pre_HP(DECL_ARGS);
  72 static  int               pre_I(DECL_ARGS);
  73 static  int               pre_IP(DECL_ARGS);
  74 static  int               pre_OP(DECL_ARGS);
  75 static  int               pre_PD(DECL_ARGS);
  76 static  int               pre_PP(DECL_ARGS);
  77 static  int               pre_RS(DECL_ARGS);
  78 static  int               pre_SH(DECL_ARGS);
  79 static  int               pre_SS(DECL_ARGS);
  80 static  int               pre_TP(DECL_ARGS);
  81 static  int               pre_UR(DECL_ARGS);
  82 static  int               pre_alternate(DECL_ARGS);
  83 static  int               pre_ft(DECL_ARGS);
  84 static  int               pre_ign(DECL_ARGS);
  85 static  int               pre_in(DECL_ARGS);
  86 static  int               pre_literal(DECL_ARGS);
  87 static  int               pre_sp(DECL_ARGS);
  88
  89 static  void              post_IP(DECL_ARGS);
  90 static  void              post_HP(DECL_ARGS);
  91 static  void              post_RS(DECL_ARGS);
  92 static  void              post_SH(DECL_ARGS);
  93 static  void              post_SS(DECL_ARGS);
  94 static  void              post_TP(DECL_ARGS);
  95 static  void              post_UR(DECL_ARGS);
  96
  97 static  const struct termact termacts[MAN_MAX] = {
  98         { pre_sp, NULL, MAN_NOTEXT }, /* br */
  99         { NULL, NULL, 0 }, /* TH */
 100         { pre_SH, post_SH, 0 }, /* SH */
 101         { pre_SS, post_SS, 0 }, /* SS */
 102         { pre_TP, post_TP, 0 }, /* TP */
 103         { pre_PP, NULL, 0 }, /* LP */
 104         { pre_PP, NULL, 0 }, /* PP */
 105         { pre_PP, NULL, 0 }, /* P */
 106         { pre_IP, post_IP, 0 }, /* IP */
 107         { pre_HP, post_HP, 0 }, /* HP */
 108         { NULL, NULL, 0 }, /* SM */
 109         { pre_B, NULL, 0 }, /* SB */
 110         { pre_alternate, NULL, 0 }, /* BI */
 111         { pre_alternate, NULL, 0 }, /* IB */
 112         { pre_alternate, NULL, 0 }, /* BR */
 113         { pre_alternate, NULL, 0 }, /* RB */
 114         { NULL, NULL, 0 }, /* R */
 115         { pre_B, NULL, 0 }, /* B */
 116         { pre_I, NULL, 0 }, /* I */
 117         { pre_alternate, NULL, 0 }, /* IR */
 118         { pre_alternate, NULL, 0 }, /* RI */
 119         { pre_ign, NULL, MAN_NOTEXT }, /* na */
 120         { pre_sp, NULL, MAN_NOTEXT }, /* sp */
 121         { pre_literal, NULL, 0 }, /* nf */
 122         { pre_literal, NULL, 0 }, /* fi */
 123         { NULL, NULL, 0 }, /* RE */
 124         { pre_RS, post_RS, 0 }, /* RS */
 125         { pre_ign, NULL, 0 }, /* DT */
 126         { pre_ign, NULL, 0 }, /* UC */
 127         { pre_PD, NULL, MAN_NOTEXT }, /* PD */
 128         { pre_ign, NULL, 0 }, /* AT */
 129         { pre_in, NULL, MAN_NOTEXT }, /* in */
 130         { pre_ft, NULL, MAN_NOTEXT }, /* ft */
 131         { pre_OP, NULL, 0 }, /* OP */
 132         { pre_literal, NULL, 0 }, /* EX */
 133         { pre_literal, NULL, 0 }, /* EE */
 134         { pre_UR, post_UR, 0 }, /* UR */
 135         { NULL, NULL, 0 }, /* UE */
 136 };
 137
 138
 139
 140 void
 141 terminal_man(void *arg, const struct man *man)
 142 {
 143         struct termp            *p;
 144         const struct man_node   *n;
 145         const struct man_meta   *meta;
 146         struct mtermp            mt;
 147
 148         p = (struct termp *)arg;
 149
 150         if (0 == p->defindent)
 151                 p->defindent = 7;
 152
 153         p->overstep = 0;
 154         p->maxrmargin = p->defrmargin;
 155         p->tabwidth = term_len(p, 5);
 156
 157         if (NULL == p->symtab)
 158                 p->symtab = mchars_alloc();
 159
 160         n = man_node(man);
 161         meta = man_meta(man);
 162
 163         term_begin(p, print_man_head, print_man_foot, meta);
 164         p->flags |= TERMP_NOSPACE;
 165
 166         memset(&mt, 0, sizeof(struct mtermp));
 167
 168         mt.lmargin[mt.lmargincur] = term_len(p, p->defindent);
 169         mt.offset = term_len(p, p->defindent);
 170         mt.pardist = 1;
 171
 172         if (n->child)
 173                 print_man_nodelist(p, &mt, n->child, meta);
 174
 175         term_end(p);
 176 }
 177
 178
 179 static size_t
 180 a2height(const struct termp *p, const char *cp)
 181 {
 182         struct roffsu    su;
 183
 184         if ( ! a2roffsu(cp, &su, SCALE_VS))
 185                 SCALE_VS_INIT(&su, atoi(cp));
 186
 187         return(term_vspan(p, &su));
 188 }
 189
 190
 191 static int
 192 a2width(const struct termp *p, const char *cp)
 193 {
 194         struct roffsu    su;
 195
 196         if ( ! a2roffsu(cp, &su, SCALE_BU))
 197                 return(-1);
 198
 199         return((int)term_hspan(p, &su));
 200 }
 201
 202 /*
 203  * Printing leading vertical space before a block.
 204  * This is used for the paragraph macros.
 205  * The rules are pretty simple, since there's very little nesting going
 206  * on here.  Basically, if we're the first within another block (SS/SH),
 207  * then don't emit vertical space.  If we are (RS), then do.  If not the
 208  * first, print it.
 209  */
 210 static void
 211 print_bvspace(struct termp *p, const struct man_node *n, int pardist)
 212 {
 213         int      i;
 214
 215         term_newln(p);
 216
 217         if (n->body && n->body->child)
 218                 if (MAN_TBL == n->body->child->type)
 219                         return;
 220
 221         if (MAN_ROOT == n->parent->type || MAN_RS != n->parent->tok)
 222                 if (NULL == n->prev)
 223                         return;
 224
 225         for (i = 0; i < pardist; i++)
 226                 term_vspace(p);
 227 }
 228
 229 /* ARGSUSED */
 230 static int
 231 pre_ign(DECL_ARGS)
 232 {
 233
 234         return(0);
 235 }
 236
 237
 238 /* ARGSUSED */
 239 static int
 240 pre_I(DECL_ARGS)
 241 {
 242
 243         term_fontrepl(p, TERMFONT_UNDER);
 244         return(1);
 245 }
 246
 247
 248 /* ARGSUSED */
 249 static int
 250 pre_literal(DECL_ARGS)
 251 {
 252
 253         term_newln(p);
 254
 255         if (MAN_nf == n->tok || MAN_EX == n->tok)
 256                 mt->fl |= MANT_LITERAL;
 257         else
 258                 mt->fl &= ~MANT_LITERAL;
 259
 260         /*
 261          * Unlike .IP and .TP, .HP does not have a HEAD.
 262          * So in case a second call to term_flushln() is needed,
 263          * indentation has to be set up explicitly.
 264          */
 265         if (MAN_HP == n->parent->tok && p->rmargin < p->maxrmargin) {
 266                 p->offset = p->rmargin;
 267                 p->rmargin = p->maxrmargin;
 268                 p->trailspace = 0;
 269                 p->flags &= ~TERMP_NOBREAK;
 270                 p->flags |= TERMP_NOSPACE;
 271         }
 272
 273         return(0);
 274 }
 275
 276 /* ARGSUSED */
 277 static int
 278 pre_PD(DECL_ARGS)
 279 {
 280
 281         n = n->child;
 282         if (0 == n) {
 283                 mt->pardist = 1;
 284                 return(0);
 285         }
 286         assert(MAN_TEXT == n->type);
 287         mt->pardist = atoi(n->string);
 288         return(0);
 289 }
 290
 291 /* ARGSUSED */
 292 static int
 293 pre_alternate(DECL_ARGS)
 294 {
 295         enum termfont            font[2];
 296         const struct man_node   *nn;
 297         int                      savelit, i;
 298
 299         switch (n->tok) {
 300         case (MAN_RB):
 301                 font[0] = TERMFONT_NONE;
 302                 font[1] = TERMFONT_BOLD;
 303                 break;
 304         case (MAN_RI):
 305                 font[0] = TERMFONT_NONE;
 306                 font[1] = TERMFONT_UNDER;
 307                 break;
 308         case (MAN_BR):
 309                 font[0] = TERMFONT_BOLD;
 310                 font[1] = TERMFONT_NONE;
 311                 break;
 312         case (MAN_BI):
 313                 font[0] = TERMFONT_BOLD;
 314                 font[1] = TERMFONT_UNDER;
 315                 break;
 316         case (MAN_IR):
 317                 font[0] = TERMFONT_UNDER;
 318                 font[1] = TERMFONT_NONE;
 319                 break;
 320         case (MAN_IB):
 321                 font[0] = TERMFONT_UNDER;
 322                 font[1] = TERMFONT_BOLD;
 323                 break;
 324         default:
 325                 abort();
 326         }
 327
 328         savelit = MANT_LITERAL & mt->fl;
 329         mt->fl &= ~MANT_LITERAL;
 330
 331         for (i = 0, nn = n->child; nn; nn = nn->next, i = 1 - i) {
 332                 term_fontrepl(p, font[i]);
 333                 if (savelit && NULL == nn->next)
 334                         mt->fl |= MANT_LITERAL;
 335                 print_man_node(p, mt, nn, meta);
 336                 if (nn->next)
 337                         p->flags |= TERMP_NOSPACE;
 338         }
 339
 340         return(0);
 341 }
 342
 343 /* ARGSUSED */
 344 static int
 345 pre_B(DECL_ARGS)
 346 {
 347
 348         term_fontrepl(p, TERMFONT_BOLD);
 349         return(1);
 350 }
 351
 352 /* ARGSUSED */
 353 static int
 354 pre_OP(DECL_ARGS)
 355 {
 356
 357         term_word(p, "[");
 358         p->flags |= TERMP_NOSPACE;
 359
 360         if (NULL != (n = n->child)) {
 361                 term_fontrepl(p, TERMFONT_BOLD);
 362                 term_word(p, n->string);
 363         }
 364         if (NULL != n && NULL != n->next) {
 365                 term_fontrepl(p, TERMFONT_UNDER);
 366                 term_word(p, n->next->string);
 367         }
 368
 369         term_fontrepl(p, TERMFONT_NONE);
 370         p->flags |= TERMP_NOSPACE;
 371         term_word(p, "]");
 372         return(0);
 373 }
 374
 375 /* ARGSUSED */
 376 static int
 377 pre_ft(DECL_ARGS)
 378 {
 379         const char      *cp;
 380
 381         if (NULL == n->child) {
 382                 term_fontlast(p);
 383                 return(0);
 384         }
 385
 386         cp = n->child->string;
 387         switch (*cp) {
 388         case ('4'):
 389                 /* FALLTHROUGH */
 390         case ('3'):
 391                 /* FALLTHROUGH */
 392         case ('B'):
 393                 term_fontrepl(p, TERMFONT_BOLD);
 394                 break;
 395         case ('2'):
 396                 /* FALLTHROUGH */
 397         case ('I'):
 398                 term_fontrepl(p, TERMFONT_UNDER);
 399                 break;
 400         case ('P'):
 401                 term_fontlast(p);
 402                 break;
 403         case ('1'):
 404                 /* FALLTHROUGH */
 405         case ('C'):
 406                 /* FALLTHROUGH */
 407         case ('R'):
 408                 term_fontrepl(p, TERMFONT_NONE);
 409                 break;
 410         default:
 411                 break;
 412         }
 413         return(0);
 414 }
 415
 416 /* ARGSUSED */
 417 static int
 418 pre_in(DECL_ARGS)
 419 {
 420         int              len, less;
 421         size_t           v;
 422         const char      *cp;
 423
 424         term_newln(p);
 425
 426         if (NULL == n->child) {
 427                 p->offset = mt->offset;
 428                 return(0);
 429         }
 430
 431         cp = n->child->string;
 432         less = 0;
 433
 434         if ('-' == *cp)
 435                 less = -1;
 436         else if ('+' == *cp)
 437                 less = 1;
 438         else
 439                 cp--;
 440
 441         if ((len = a2width(p, ++cp)) < 0)
 442                 return(0);
 443
 444         v = (size_t)len;
 445
 446         if (less < 0)
 447                 p->offset -= p->offset > v ? v : p->offset;
 448         else if (less > 0)
 449                 p->offset += v;
 450         else
 451                 p->offset = v;
 452
 453         /* Don't let this creep beyond the right margin. */
 454
 455         if (p->offset > p->rmargin)
 456                 p->offset = p->rmargin;
 457
 458         return(0);
 459 }
 460
 461
 462 /* ARGSUSED */
 463 static int
 464 pre_sp(DECL_ARGS)
 465 {
 466         char            *s;
 467         size_t           i, len;
 468         int              neg;
 469
 470         if ((NULL == n->prev && n->parent)) {
 471                 switch (n->parent->tok) {
 472                 case (MAN_SH):
 473                         /* FALLTHROUGH */
 474                 case (MAN_SS):
 475                         /* FALLTHROUGH */
 476                 case (MAN_PP):
 477                         /* FALLTHROUGH */
 478                 case (MAN_LP):
 479                         /* FALLTHROUGH */
 480                 case (MAN_P):
 481                         /* FALLTHROUGH */
 482                         return(0);
 483                 default:
 484                         break;
 485                 }
 486         }
 487
 488         neg = 0;
 489         switch (n->tok) {
 490         case (MAN_br):
 491                 len = 0;
 492                 break;
 493         default:
 494                 if (NULL == n->child) {
 495                         len = 1;
 496                         break;
 497                 }
 498                 s = n->child->string;
 499                 if ('-' == *s) {
 500                         neg = 1;
 501                         s++;
 502                 }
 503                 len = a2height(p, s);
 504                 break;
 505         }
 506
 507         if (0 == len)
 508                 term_newln(p);
 509         else if (neg)
 510                 p->skipvsp += len;
 511         else
 512                 for (i = 0; i < len; i++)
 513                         term_vspace(p);
 514
 515         return(0);
 516 }
 517
 518
 519 /* ARGSUSED */
 520 static int
 521 pre_HP(DECL_ARGS)
 522 {
 523         size_t                   len, one;
 524         int                      ival;
 525         const struct man_node   *nn;
 526
 527         switch (n->type) {
 528         case (MAN_BLOCK):
 529                 print_bvspace(p, n, mt->pardist);
 530                 return(1);
 531         case (MAN_BODY):
 532                 break;
 533         default:
 534                 return(0);
 535         }
 536
 537         if ( ! (MANT_LITERAL & mt->fl)) {
 538                 p->flags |= TERMP_NOBREAK;
 539                 p->trailspace = 2;
 540         }
 541
 542         len = mt->lmargin[mt->lmargincur];
 543         ival = -1;
 544
 545         /* Calculate offset. */
 546
 547         if (NULL != (nn = n->parent->head->child))
 548                 if ((ival = a2width(p, nn->string)) >= 0)
 549                         len = (size_t)ival;
 550
 551         one = term_len(p, 1);
 552         if (len < one)
 553                 len = one;
 554
 555         p->offset = mt->offset;
 556         p->rmargin = mt->offset + len;
 557
 558         if (ival >= 0)
 559                 mt->lmargin[mt->lmargincur] = (size_t)ival;
 560
 561         return(1);
 562 }
 563
 564
 565 /* ARGSUSED */
 566 static void
 567 post_HP(DECL_ARGS)
 568 {
 569
 570         switch (n->type) {
 571         case (MAN_BODY):
 572                 term_newln(p);
 573                 p->flags &= ~TERMP_NOBREAK;
 574                 p->trailspace = 0;
 575                 p->offset = mt->offset;
 576                 p->rmargin = p->maxrmargin;
 577                 break;
 578         default:
 579                 break;
 580         }
 581 }
 582
 583
 584 /* ARGSUSED */
 585 static int
 586 pre_PP(DECL_ARGS)
 587 {
 588
 589         switch (n->type) {
 590         case (MAN_BLOCK):
 591                 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
 592                 print_bvspace(p, n, mt->pardist);
 593                 break;
 594         default:
 595                 p->offset = mt->offset;
 596                 break;
 597         }
 598
 599         return(MAN_HEAD != n->type);
 600 }
 601
 602
 603 /* ARGSUSED */
 604 static int
 605 pre_IP(DECL_ARGS)
 606 {
 607         const struct man_node   *nn;
 608         size_t                   len;
 609         int                      savelit, ival;
 610
 611         switch (n->type) {
 612         case (MAN_BODY):
 613                 p->flags |= TERMP_NOSPACE;
 614                 break;
 615         case (MAN_HEAD):
 616                 p->flags |= TERMP_NOBREAK;
 617                 p->trailspace = 1;
 618                 break;
 619         case (MAN_BLOCK):
 620                 print_bvspace(p, n, mt->pardist);
 621                 /* FALLTHROUGH */
 622         default:
 623                 return(1);
 624         }
 625
 626         len = mt->lmargin[mt->lmargincur];
 627         ival = -1;
 628
 629         /* Calculate the offset from the optional second argument. */
 630         if (NULL != (nn = n->parent->head->child))
 631                 if (NULL != (nn = nn->next))
 632                         if ((ival = a2width(p, nn->string)) >= 0)
 633                                 len = (size_t)ival;
 634
 635         switch (n->type) {
 636         case (MAN_HEAD):
 637                 /* Handle zero-width lengths. */
 638                 if (0 == len)
 639                         len = term_len(p, 1);
 640
 641                 p->offset = mt->offset;
 642                 p->rmargin = mt->offset + len;
 643                 if (ival < 0)
 644                         break;
 645
 646                 /* Set the saved left-margin. */
 647                 mt->lmargin[mt->lmargincur] = (size_t)ival;
 648
 649                 savelit = MANT_LITERAL & mt->fl;
 650                 mt->fl &= ~MANT_LITERAL;
 651
 652                 if (n->child)
 653                         print_man_node(p, mt, n->child, meta);
 654
 655                 if (savelit)
 656                         mt->fl |= MANT_LITERAL;
 657
 658                 return(0);
 659         case (MAN_BODY):
 660                 p->offset = mt->offset + len;
 661                 p->rmargin = p->maxrmargin > p->offset ?
 662                                 p->maxrmargin : p->offset;
 663                 break;
 664         default:
 665                 break;
 666         }
 667
 668         return(1);
 669 }
 670
 671
 672 /* ARGSUSED */
 673 static void
 674 post_IP(DECL_ARGS)
 675 {
 676
 677         switch (n->type) {
 678         case (MAN_HEAD):
 679                 term_flushln(p);
 680                 p->flags &= ~TERMP_NOBREAK;
 681                 p->trailspace = 0;
 682                 p->rmargin = p->maxrmargin;
 683                 break;
 684         case (MAN_BODY):
 685                 term_newln(p);
 686                 p->offset = mt->offset;
 687                 break;
 688         default:
 689                 break;
 690         }
 691 }
 692
 693
 694 /* ARGSUSED */
 695 static int
 696 pre_TP(DECL_ARGS)
 697 {
 698         const struct man_node   *nn;
 699         size_t                   len;
 700         int                      savelit, ival;
 701
 702         switch (n->type) {
 703         case (MAN_HEAD):
 704                 p->flags |= TERMP_NOBREAK;
 705                 p->trailspace = 1;
 706                 break;
 707         case (MAN_BODY):
 708                 p->flags |= TERMP_NOSPACE;
 709                 break;
 710         case (MAN_BLOCK):
 711                 print_bvspace(p, n, mt->pardist);
 712                 /* FALLTHROUGH */
 713         default:
 714                 return(1);
 715         }
 716
 717         len = (size_t)mt->lmargin[mt->lmargincur];
 718         ival = -1;
 719
 720         /* Calculate offset. */
 721
 722         if (NULL != (nn = n->parent->head->child))
 723                 if (nn->string && nn->parent->line == nn->line)
 724                         if ((ival = a2width(p, nn->string)) >= 0)
 725                                 len = (size_t)ival;
 726
 727         switch (n->type) {
 728         case (MAN_HEAD):
 729                 /* Handle zero-length properly. */
 730                 if (0 == len)
 731                         len = term_len(p, 1);
 732
 733                 p->offset = mt->offset;
 734                 p->rmargin = mt->offset + len;
 735
 736                 savelit = MANT_LITERAL & mt->fl;
 737                 mt->fl &= ~MANT_LITERAL;
 738
 739                 /* Don't print same-line elements. */
 740                 for (nn = n->child; nn; nn = nn->next)
 741                         if (nn->line > n->line)
 742                                 print_man_node(p, mt, nn, meta);
 743
 744                 if (savelit)
 745                         mt->fl |= MANT_LITERAL;
 746                 if (ival >= 0)
 747                         mt->lmargin[mt->lmargincur] = (size_t)ival;
 748
 749                 return(0);
 750         case (MAN_BODY):
 751                 p->offset = mt->offset + len;
 752                 p->rmargin = p->maxrmargin > p->offset ?
 753                                 p->maxrmargin : p->offset;
 754                 p->trailspace = 0;
 755                 p->flags &= ~TERMP_NOBREAK;
 756                 break;
 757         default:
 758                 break;
 759         }
 760
 761         return(1);
 762 }
 763
 764
 765 /* ARGSUSED */
 766 static void
 767 post_TP(DECL_ARGS)
 768 {
 769
 770         switch (n->type) {
 771         case (MAN_HEAD):
 772                 term_flushln(p);
 773                 break;
 774         case (MAN_BODY):
 775                 term_newln(p);
 776                 p->offset = mt->offset;
 777                 break;
 778         default:
 779                 break;
 780         }
 781 }
 782
 783
 784 /* ARGSUSED */
 785 static int
 786 pre_SS(DECL_ARGS)
 787 {
 788         int      i;
 789
 790         switch (n->type) {
 791         case (MAN_BLOCK):
 792                 mt->fl &= ~MANT_LITERAL;
 793                 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
 794                 mt->offset = term_len(p, p->defindent);
 795                 /* If following a prior empty `SS', no vspace. */
 796                 if (n->prev && MAN_SS == n->prev->tok)
 797                         if (NULL == n->prev->body->child)
 798                                 break;
 799                 if (NULL == n->prev)
 800                         break;
 801                 for (i = 0; i < mt->pardist; i++)
 802                         term_vspace(p);
 803                 break;
 804         case (MAN_HEAD):
 805                 term_fontrepl(p, TERMFONT_BOLD);
 806                 p->offset = term_len(p, 3);
 807                 break;
 808         case (MAN_BODY):
 809                 p->offset = mt->offset;
 810                 break;
 811         default:
 812                 break;
 813         }
 814
 815         return(1);
 816 }
 817
 818
 819 /* ARGSUSED */
 820 static void
 821 post_SS(DECL_ARGS)
 822 {
 823
 824         switch (n->type) {
 825         case (MAN_HEAD):
 826                 term_newln(p);
 827                 break;
 828         case (MAN_BODY):
 829                 term_newln(p);
 830                 break;
 831         default:
 832                 break;
 833         }
 834 }
 835
 836
 837 /* ARGSUSED */
 838 static int
 839 pre_SH(DECL_ARGS)
 840 {
 841         int      i;
 842
 843         switch (n->type) {
 844         case (MAN_BLOCK):
 845                 mt->fl &= ~MANT_LITERAL;
 846                 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
 847                 mt->offset = term_len(p, p->defindent);
 848                 /* If following a prior empty `SH', no vspace. */
 849                 if (n->prev && MAN_SH == n->prev->tok)
 850                         if (NULL == n->prev->body->child)
 851                                 break;
 852                 /* If the first macro, no vspae. */
 853                 if (NULL == n->prev)
 854                         break;
 855                 for (i = 0; i < mt->pardist; i++)
 856                         term_vspace(p);
 857                 break;
 858         case (MAN_HEAD):
 859                 term_fontrepl(p, TERMFONT_BOLD);
 860                 p->offset = 0;
 861                 break;
 862         case (MAN_BODY):
 863                 p->offset = mt->offset;
 864                 break;
 865         default:
 866                 break;
 867         }
 868
 869         return(1);
 870 }
 871
 872
 873 /* ARGSUSED */
 874 static void
 875 post_SH(DECL_ARGS)
 876 {
 877
 878         switch (n->type) {
 879         case (MAN_HEAD):
 880                 term_newln(p);
 881                 break;
 882         case (MAN_BODY):
 883                 term_newln(p);
 884                 break;
 885         default:
 886                 break;
 887         }
 888 }
 889
 890 /* ARGSUSED */
 891 static int
 892 pre_RS(DECL_ARGS)
 893 {
 894         int              ival;
 895         size_t           sz;
 896
 897         switch (n->type) {
 898         case (MAN_BLOCK):
 899                 term_newln(p);
 900                 return(1);
 901         case (MAN_HEAD):
 902                 return(0);
 903         default:
 904                 break;
 905         }
 906
 907         sz = term_len(p, p->defindent);
 908
 909         if (NULL != (n = n->parent->head->child))
 910                 if ((ival = a2width(p, n->string)) >= 0)
 911                         sz = (size_t)ival;
 912
 913         mt->offset += sz;
 914         p->offset = mt->offset;
 915         p->rmargin = p->maxrmargin > p->offset ?
 916                         p->maxrmargin : p->offset;
 917
 918         if (++mt->lmarginsz < MAXMARGINS)
 919                 mt->lmargincur = mt->lmarginsz;
 920
 921         mt->lmargin[mt->lmargincur] = mt->lmargin[mt->lmargincur - 1];
 922         return(1);
 923 }
 924
 925 /* ARGSUSED */
 926 static void
 927 post_RS(DECL_ARGS)
 928 {
 929         int              ival;
 930         size_t           sz;
 931
 932         switch (n->type) {
 933         case (MAN_BLOCK):
 934                 return;
 935         case (MAN_HEAD):
 936                 return;
 937         default:
 938                 term_newln(p);
 939                 break;
 940         }
 941
 942         sz = term_len(p, p->defindent);
 943
 944         if (NULL != (n = n->parent->head->child))
 945                 if ((ival = a2width(p, n->string)) >= 0)
 946                         sz = (size_t)ival;
 947
 948         mt->offset = mt->offset < sz ?  0 : mt->offset - sz;
 949         p->offset = mt->offset;
 950
 951         if (--mt->lmarginsz < MAXMARGINS)
 952                 mt->lmargincur = mt->lmarginsz;
 953 }
 954
 955 /* ARGSUSED */
 956 static int
 957 pre_UR(DECL_ARGS)
 958 {
 959
 960         return (MAN_HEAD != n->type);
 961 }
 962
 963 /* ARGSUSED */
 964 static void
 965 post_UR(DECL_ARGS)
 966 {
 967
 968         if (MAN_BLOCK != n->type)
 969                 return;
 970
 971         term_word(p, "<");
 972         p->flags |= TERMP_NOSPACE;
 973
 974         if (NULL != n->child->child)
 975                 print_man_node(p, mt, n->child->child, meta);
 976
 977         p->flags |= TERMP_NOSPACE;
 978         term_word(p, ">");
 979 }
 980
 981 static void
 982 print_man_node(DECL_ARGS)
 983 {
 984         size_t           rm, rmax;
 985         int              c;
 986
 987         switch (n->type) {
 988         case(MAN_TEXT):
 989                 /*
 990                  * If we have a blank line, output a vertical space.
 991                  * If we have a space as the first character, break
 992                  * before printing the line's data.
 993                  */
 994                 if ('\0' == *n->string) {
 995                         term_vspace(p);
 996                         return;
 997                 } else if (' ' == *n->string && MAN_LINE & n->flags)
 998                         term_newln(p);
 999
1000                 term_word(p, n->string);
1001                 goto out;
1002
1003         case (MAN_EQN):
1004                 term_eqn(p, n->eqn);
1005                 return;
1006         case (MAN_TBL):
1007                 /*
1008                  * Tables are preceded by a newline.  Then process a
1009                  * table line, which will cause line termination,
1010                  */
1011                 if (TBL_SPAN_FIRST & n->span->flags)
1012                         term_newln(p);
1013                 term_tbl(p, n->span);
1014                 return;
1015         default:
1016                 break;
1017         }
1018
1019         if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
1020                 term_fontrepl(p, TERMFONT_NONE);
1021
1022         c = 1;
1023         if (termacts[n->tok].pre)
1024                 c = (*termacts[n->tok].pre)(p, mt, n, meta);
1025
1026         if (c && n->child)
1027                 print_man_nodelist(p, mt, n->child, meta);
1028
1029         if (termacts[n->tok].post)
1030                 (*termacts[n->tok].post)(p, mt, n, meta);
1031         if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
1032                 term_fontrepl(p, TERMFONT_NONE);
1033
1034 out:
1035         /*
1036          * If we're in a literal context, make sure that words
1037          * together on the same line stay together.  This is a
1038          * POST-printing call, so we check the NEXT word.  Since
1039          * -man doesn't have nested macros, we don't need to be
1040          * more specific than this.
1041          */
1042         if (MANT_LITERAL & mt->fl && ! (TERMP_NOBREAK & p->flags) &&
1043             (NULL == n->next || n->next->line > n->line)) {
1044                 rm = p->rmargin;
1045                 rmax = p->maxrmargin;
1046                 p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
1047                 p->flags |= TERMP_NOSPACE;
1048                 if (NULL != n->string && '\0' != *n->string)
1049                         term_flushln(p);
1050                 else
1051                         term_newln(p);
1052                 if (rm < rmax && n->parent->tok == MAN_HP) {
1053                         p->offset = rm;
1054                         p->rmargin = rmax;
1055                 } else
1056                         p->rmargin = rm;
1057                 p->maxrmargin = rmax;
1058         }
1059         if (MAN_EOS & n->flags)
1060                 p->flags |= TERMP_SENTENCE;
1061 }
1062
1063
1064 static void
1065 print_man_nodelist(DECL_ARGS)
1066 {
1067
1068         print_man_node(p, mt, n, meta);
1069         if ( ! n->next)
1070                 return;
1071         print_man_nodelist(p, mt, n->next, meta);
1072 }
1073
1074
1075 static void
1076 print_man_foot(struct termp *p, const void *arg)
1077 {
1078         char            title[BUFSIZ];
1079         size_t          datelen;
1080         const struct man_meta *meta;
1081
1082         meta = (const struct man_meta *)arg;
1083         assert(meta->title);
1084         assert(meta->msec);
1085         assert(meta->date);
1086
1087         term_fontrepl(p, TERMFONT_NONE);
1088
1089         term_vspace(p);
1090
1091         /*
1092          * Temporary, undocumented option to imitate mdoc(7) output.
1093          * In the bottom right corner, use the source instead of
1094          * the title.
1095          */
1096
1097         if ( ! p->mdocstyle) {
1098                 term_vspace(p);
1099                 term_vspace(p);
1100                 snprintf(title, BUFSIZ, "%s(%s)", meta->title, meta->msec);
1101         } else if (meta->source) {
1102                 strlcpy(title, meta->source, BUFSIZ);
1103         } else {
1104                 title[0] = '\0';
1105         }
1106         datelen = term_strlen(p, meta->date);
1107
1108         /* Bottom left corner: manual source. */
1109
1110         p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
1111         p->trailspace = 1;
1112         p->offset = 0;
1113         p->rmargin = (p->maxrmargin - datelen + term_len(p, 1)) / 2;
1114
1115         if (meta->source)
1116                 term_word(p, meta->source);
1117         term_flushln(p);
1118
1119         /* At the bottom in the middle: manual date. */
1120
1121         p->flags |= TERMP_NOSPACE;
1122         p->offset = p->rmargin;
1123         p->rmargin = p->maxrmargin - term_strlen(p, title);
1124         if (p->offset + datelen >= p->rmargin)
1125                 p->rmargin = p->offset + datelen;
1126
1127         term_word(p, meta->date);
1128         term_flushln(p);
1129
1130         /* Bottom right corner: manual title and section. */
1131
1132         p->flags &= ~TERMP_NOBREAK;
1133         p->flags |= TERMP_NOSPACE;
1134         p->trailspace = 0;
1135         p->offset = p->rmargin;
1136         p->rmargin = p->maxrmargin;
1137
1138         term_word(p, title);
1139         term_flushln(p);
1140 }
1141
1142
1143 static void
1144 print_man_head(struct termp *p, const void *arg)
1145 {
1146         char            buf[BUFSIZ], title[BUFSIZ];
1147         size_t          buflen, titlen;
1148         const struct man_meta *meta;
1149
1150         meta = (const struct man_meta *)arg;
1151         assert(meta->title);
1152         assert(meta->msec);
1153
1154         if (meta->vol)
1155                 strlcpy(buf, meta->vol, BUFSIZ);
1156         else
1157                 buf[0] = '\0';
1158         buflen = term_strlen(p, buf);
1159
1160         /* Top left corner: manual title and section. */
1161
1162         snprintf(title, BUFSIZ, "%s(%s)", meta->title, meta->msec);
1163         titlen = term_strlen(p, title);
1164
1165         p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
1166         p->trailspace = 1;
1167         p->offset = 0;
1168         p->rmargin = 2 * (titlen+1) + buflen < p->maxrmargin ?
1169             (p->maxrmargin -
1170              term_strlen(p, buf) + term_len(p, 1)) / 2 :
1171             p->maxrmargin - buflen;
1172
1173         term_word(p, title);
1174         term_flushln(p);
1175
1176         /* At the top in the middle: manual volume. */
1177
1178         p->flags |= TERMP_NOSPACE;
1179         p->offset = p->rmargin;
1180         p->rmargin = p->offset + buflen + titlen < p->maxrmargin ?
1181             p->maxrmargin - titlen : p->maxrmargin;
1182
1183         term_word(p, buf);
1184         term_flushln(p);
1185
1186         /* Top right corner: title and section, again. */
1187
1188         p->flags &= ~TERMP_NOBREAK;
1189         p->trailspace = 0;
1190         if (p->rmargin + titlen <= p->maxrmargin) {
1191                 p->flags |= TERMP_NOSPACE;
1192                 p->offset = p->rmargin;
1193                 p->rmargin = p->maxrmargin;
1194                 term_word(p, title);
1195                 term_flushln(p);
1196         }
1197
1198         p->flags &= ~TERMP_NOSPACE;
1199         p->offset = 0;
1200         p->rmargin = p->maxrmargin;
1201
1202         /*
1203          * Groff prints three blank lines before the content.
1204          * Do the same, except in the temporary, undocumented
1205          * mode imitating mdoc(7) output.
1206          */
1207
1208         term_vspace(p);
1209         if ( ! p->mdocstyle) {
1210                 term_vspace(p);
1211                 term_vspace(p);
1212         }
1213 }