man_term.c

   1 /*      $Id: man_term.c,v 1.203 2017/06/07 17:38:26 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010-2015, 2017 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 AUTHORS DISCLAIM ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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 #include "config.h"
  19
  20 #include <sys/types.h>
  21
  22 #include <assert.h>
  23 #include <ctype.h>
  24 #include <limits.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "mandoc_aux.h"
  30 #include "mandoc.h"
  31 #include "roff.h"
  32 #include "man.h"
  33 #include "out.h"
  34 #include "term.h"
  35 #include "main.h"
  36
  37 #define MAXMARGINS        64 /* maximum number of indented scopes */
  38
  39 struct  mtermp {
  40         int               fl;
  41 #define MANT_LITERAL     (1 << 0)
  42         int               lmargin[MAXMARGINS]; /* margins (incl. vis. page) */
  43         int               lmargincur; /* index of current margin */
  44         int               lmarginsz; /* actual number of nested margins */
  45         size_t            offset; /* default offset to visible page */
  46         int               pardist; /* vert. space before par., unit: [v] */
  47 };
  48
  49 #define DECL_ARGS         struct termp *p, \
  50                           struct mtermp *mt, \
  51                           struct roff_node *n, \
  52                           const struct roff_meta *meta
  53
  54 struct  termact {
  55         int             (*pre)(DECL_ARGS);
  56         void            (*post)(DECL_ARGS);
  57         int               flags;
  58 #define MAN_NOTEXT       (1 << 0) /* Never has text children. */
  59 };
  60
  61 static  void              print_man_nodelist(DECL_ARGS);
  62 static  void              print_man_node(DECL_ARGS);
  63 static  void              print_man_head(struct termp *,
  64                                 const struct roff_meta *);
  65 static  void              print_man_foot(struct termp *,
  66                                 const struct roff_meta *);
  67 static  void              print_bvspace(struct termp *,
  68                                 const struct roff_node *, int);
  69
  70 static  int               pre_B(DECL_ARGS);
  71 static  int               pre_DT(DECL_ARGS);
  72 static  int               pre_HP(DECL_ARGS);
  73 static  int               pre_I(DECL_ARGS);
  74 static  int               pre_IP(DECL_ARGS);
  75 static  int               pre_OP(DECL_ARGS);
  76 static  int               pre_PD(DECL_ARGS);
  77 static  int               pre_PP(DECL_ARGS);
  78 static  int               pre_RS(DECL_ARGS);
  79 static  int               pre_SH(DECL_ARGS);
  80 static  int               pre_SS(DECL_ARGS);
  81 static  int               pre_TP(DECL_ARGS);
  82 static  int               pre_UR(DECL_ARGS);
  83 static  int               pre_alternate(DECL_ARGS);
  84 static  int               pre_ign(DECL_ARGS);
  85 static  int               pre_in(DECL_ARGS);
  86 static  int               pre_literal(DECL_ARGS);
  87
  88 static  void              post_IP(DECL_ARGS);
  89 static  void              post_HP(DECL_ARGS);
  90 static  void              post_RS(DECL_ARGS);
  91 static  void              post_SH(DECL_ARGS);
  92 static  void              post_SS(DECL_ARGS);
  93 static  void              post_TP(DECL_ARGS);
  94 static  void              post_UR(DECL_ARGS);
  95
  96 static  const struct termact __termacts[MAN_MAX - MAN_TH] = {
  97         { NULL, NULL, 0 }, /* TH */
  98         { pre_SH, post_SH, 0 }, /* SH */
  99         { pre_SS, post_SS, 0 }, /* SS */
 100         { pre_TP, post_TP, 0 }, /* TP */
 101         { pre_PP, NULL, 0 }, /* LP */
 102         { pre_PP, NULL, 0 }, /* PP */
 103         { pre_PP, NULL, 0 }, /* P */
 104         { pre_IP, post_IP, 0 }, /* IP */
 105         { pre_HP, post_HP, 0 }, /* HP */
 106         { NULL, NULL, 0 }, /* SM */
 107         { pre_B, NULL, 0 }, /* SB */
 108         { pre_alternate, NULL, 0 }, /* BI */
 109         { pre_alternate, NULL, 0 }, /* IB */
 110         { pre_alternate, NULL, 0 }, /* BR */
 111         { pre_alternate, NULL, 0 }, /* RB */
 112         { NULL, NULL, 0 }, /* R */
 113         { pre_B, NULL, 0 }, /* B */
 114         { pre_I, NULL, 0 }, /* I */
 115         { pre_alternate, NULL, 0 }, /* IR */
 116         { pre_alternate, NULL, 0 }, /* RI */
 117         { pre_literal, NULL, 0 }, /* nf */
 118         { pre_literal, NULL, 0 }, /* fi */
 119         { NULL, NULL, 0 }, /* RE */
 120         { pre_RS, post_RS, 0 }, /* RS */
 121         { pre_DT, NULL, 0 }, /* DT */
 122         { pre_ign, NULL, MAN_NOTEXT }, /* UC */
 123         { pre_PD, NULL, MAN_NOTEXT }, /* PD */
 124         { pre_ign, NULL, 0 }, /* AT */
 125         { pre_in, NULL, MAN_NOTEXT }, /* in */
 126         { pre_OP, NULL, 0 }, /* OP */
 127         { pre_literal, NULL, 0 }, /* EX */
 128         { pre_literal, NULL, 0 }, /* EE */
 129         { pre_UR, post_UR, 0 }, /* UR */
 130         { NULL, NULL, 0 }, /* UE */
 131 };
 132 static  const struct termact *termacts = __termacts - MAN_TH;
 133
 134
 135 void
 136 terminal_man(void *arg, const struct roff_man *man)
 137 {
 138         struct termp            *p;
 139         struct roff_node        *n;
 140         struct mtermp            mt;
 141         size_t                   save_defindent;
 142
 143         p = (struct termp *)arg;
 144         p->tcol->rmargin = p->maxrmargin = p->defrmargin;
 145         term_tab_set(p, NULL);
 146         term_tab_set(p, "T");
 147         term_tab_set(p, ".5i");
 148
 149         memset(&mt, 0, sizeof(struct mtermp));
 150         mt.lmargin[mt.lmargincur] = term_len(p, p->defindent);
 151         mt.offset = term_len(p, p->defindent);
 152         mt.pardist = 1;
 153
 154         n = man->first->child;
 155         if (p->synopsisonly) {
 156                 while (n != NULL) {
 157                         if (n->tok == MAN_SH &&
 158                             n->child->child->type == ROFFT_TEXT &&
 159                             !strcmp(n->child->child->string, "SYNOPSIS")) {
 160                                 if (n->child->next->child != NULL)
 161                                         print_man_nodelist(p, &mt,
 162                                             n->child->next->child,
 163                                             &man->meta);
 164                                 term_newln(p);
 165                                 break;
 166                         }
 167                         n = n->next;
 168                 }
 169         } else {
 170                 save_defindent = p->defindent;
 171                 if (p->defindent == 0)
 172                         p->defindent = 7;
 173                 term_begin(p, print_man_head, print_man_foot, &man->meta);
 174                 p->flags |= TERMP_NOSPACE;
 175                 if (n != NULL)
 176                         print_man_nodelist(p, &mt, n, &man->meta);
 177                 term_end(p);
 178                 p->defindent = save_defindent;
 179         }
 180 }
 181
 182 /*
 183  * Printing leading vertical space before a block.
 184  * This is used for the paragraph macros.
 185  * The rules are pretty simple, since there's very little nesting going
 186  * on here.  Basically, if we're the first within another block (SS/SH),
 187  * then don't emit vertical space.  If we are (RS), then do.  If not the
 188  * first, print it.
 189  */
 190 static void
 191 print_bvspace(struct termp *p, const struct roff_node *n, int pardist)
 192 {
 193         int      i;
 194
 195         term_newln(p);
 196
 197         if (n->body && n->body->child)
 198                 if (n->body->child->type == ROFFT_TBL)
 199                         return;
 200
 201         if (n->parent->type == ROFFT_ROOT || n->parent->tok != MAN_RS)
 202                 if (NULL == n->prev)
 203                         return;
 204
 205         for (i = 0; i < pardist; i++)
 206                 term_vspace(p);
 207 }
 208
 209
 210 static int
 211 pre_ign(DECL_ARGS)
 212 {
 213
 214         return 0;
 215 }
 216
 217 static int
 218 pre_I(DECL_ARGS)
 219 {
 220
 221         term_fontrepl(p, TERMFONT_UNDER);
 222         return 1;
 223 }
 224
 225 static int
 226 pre_literal(DECL_ARGS)
 227 {
 228
 229         term_newln(p);
 230
 231         if (n->tok == MAN_nf || n->tok == MAN_EX)
 232                 mt->fl |= MANT_LITERAL;
 233         else
 234                 mt->fl &= ~MANT_LITERAL;
 235
 236         /*
 237          * Unlike .IP and .TP, .HP does not have a HEAD.
 238          * So in case a second call to term_flushln() is needed,
 239          * indentation has to be set up explicitly.
 240          */
 241         if (n->parent->tok == MAN_HP && p->tcol->rmargin < p->maxrmargin) {
 242                 p->tcol->offset = p->tcol->rmargin;
 243                 p->tcol->rmargin = p->maxrmargin;
 244                 p->trailspace = 0;
 245                 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
 246                 p->flags |= TERMP_NOSPACE;
 247         }
 248
 249         return 0;
 250 }
 251
 252 static int
 253 pre_PD(DECL_ARGS)
 254 {
 255         struct roffsu    su;
 256
 257         n = n->child;
 258         if (n == NULL) {
 259                 mt->pardist = 1;
 260                 return 0;
 261         }
 262         assert(n->type == ROFFT_TEXT);
 263         if (a2roffsu(n->string, &su, SCALE_VS))
 264                 mt->pardist = term_vspan(p, &su);
 265         return 0;
 266 }
 267
 268 static int
 269 pre_alternate(DECL_ARGS)
 270 {
 271         enum termfont            font[2];
 272         struct roff_node        *nn;
 273         int                      savelit, i;
 274
 275         switch (n->tok) {
 276         case MAN_RB:
 277                 font[0] = TERMFONT_NONE;
 278                 font[1] = TERMFONT_BOLD;
 279                 break;
 280         case MAN_RI:
 281                 font[0] = TERMFONT_NONE;
 282                 font[1] = TERMFONT_UNDER;
 283                 break;
 284         case MAN_BR:
 285                 font[0] = TERMFONT_BOLD;
 286                 font[1] = TERMFONT_NONE;
 287                 break;
 288         case MAN_BI:
 289                 font[0] = TERMFONT_BOLD;
 290                 font[1] = TERMFONT_UNDER;
 291                 break;
 292         case MAN_IR:
 293                 font[0] = TERMFONT_UNDER;
 294                 font[1] = TERMFONT_NONE;
 295                 break;
 296         case MAN_IB:
 297                 font[0] = TERMFONT_UNDER;
 298                 font[1] = TERMFONT_BOLD;
 299                 break;
 300         default:
 301                 abort();
 302         }
 303
 304         savelit = MANT_LITERAL & mt->fl;
 305         mt->fl &= ~MANT_LITERAL;
 306
 307         for (i = 0, nn = n->child; nn; nn = nn->next, i = 1 - i) {
 308                 term_fontrepl(p, font[i]);
 309                 if (savelit && NULL == nn->next)
 310                         mt->fl |= MANT_LITERAL;
 311                 assert(nn->type == ROFFT_TEXT);
 312                 term_word(p, nn->string);
 313                 if (nn->flags & NODE_EOS)
 314                         p->flags |= TERMP_SENTENCE;
 315                 if (nn->next)
 316                         p->flags |= TERMP_NOSPACE;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static int
 323 pre_B(DECL_ARGS)
 324 {
 325
 326         term_fontrepl(p, TERMFONT_BOLD);
 327         return 1;
 328 }
 329
 330 static int
 331 pre_OP(DECL_ARGS)
 332 {
 333
 334         term_word(p, "[");
 335         p->flags |= TERMP_NOSPACE;
 336
 337         if (NULL != (n = n->child)) {
 338                 term_fontrepl(p, TERMFONT_BOLD);
 339                 term_word(p, n->string);
 340         }
 341         if (NULL != n && NULL != n->next) {
 342                 term_fontrepl(p, TERMFONT_UNDER);
 343                 term_word(p, n->next->string);
 344         }
 345
 346         term_fontrepl(p, TERMFONT_NONE);
 347         p->flags |= TERMP_NOSPACE;
 348         term_word(p, "]");
 349         return 0;
 350 }
 351
 352 static int
 353 pre_in(DECL_ARGS)
 354 {
 355         struct roffsu    su;
 356         const char      *cp;
 357         size_t           v;
 358         int              less;
 359
 360         term_newln(p);
 361
 362         if (n->child == NULL) {
 363                 p->tcol->offset = mt->offset;
 364                 return 0;
 365         }
 366
 367         cp = n->child->string;
 368         less = 0;
 369
 370         if ('-' == *cp)
 371                 less = -1;
 372         else if ('+' == *cp)
 373                 less = 1;
 374         else
 375                 cp--;
 376
 377         if ( ! a2roffsu(++cp, &su, SCALE_EN))
 378                 return 0;
 379
 380         v = (term_hspan(p, &su) + 11) / 24;
 381
 382         if (less < 0)
 383                 p->tcol->offset -= p->tcol->offset > v ? v : p->tcol->offset;
 384         else if (less > 0)
 385                 p->tcol->offset += v;
 386         else
 387                 p->tcol->offset = v;
 388         if (p->tcol->offset > SHRT_MAX)
 389                 p->tcol->offset = term_len(p, p->defindent);
 390
 391         return 0;
 392 }
 393
 394 static int
 395 pre_DT(DECL_ARGS)
 396 {
 397         term_tab_set(p, NULL);
 398         term_tab_set(p, "T");
 399         term_tab_set(p, ".5i");
 400         return 0;
 401 }
 402
 403 static int
 404 pre_HP(DECL_ARGS)
 405 {
 406         struct roffsu            su;
 407         const struct roff_node  *nn;
 408         int                      len;
 409
 410         switch (n->type) {
 411         case ROFFT_BLOCK:
 412                 print_bvspace(p, n, mt->pardist);
 413                 return 1;
 414         case ROFFT_BODY:
 415                 break;
 416         default:
 417                 return 0;
 418         }
 419
 420         if ( ! (MANT_LITERAL & mt->fl)) {
 421                 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
 422                 p->trailspace = 2;
 423         }
 424
 425         /* Calculate offset. */
 426
 427         if ((nn = n->parent->head->child) != NULL &&
 428             a2roffsu(nn->string, &su, SCALE_EN)) {
 429                 len = term_hspan(p, &su) / 24;
 430                 if (len < 0 && (size_t)(-len) > mt->offset)
 431                         len = -mt->offset;
 432                 else if (len > SHRT_MAX)
 433                         len = term_len(p, p->defindent);
 434                 mt->lmargin[mt->lmargincur] = len;
 435         } else
 436                 len = mt->lmargin[mt->lmargincur];
 437
 438         p->tcol->offset = mt->offset;
 439         p->tcol->rmargin = mt->offset + len;
 440         return 1;
 441 }
 442
 443 static void
 444 post_HP(DECL_ARGS)
 445 {
 446
 447         switch (n->type) {
 448         case ROFFT_BODY:
 449                 term_newln(p);
 450
 451                 /*
 452                  * Compatibility with a groff bug.
 453                  * The .HP macro uses the undocumented .tag request
 454                  * which causes a line break and cancels no-space
 455                  * mode even if there isn't any output.
 456                  */
 457
 458                 if (n->child == NULL)
 459                         term_vspace(p);
 460
 461                 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
 462                 p->trailspace = 0;
 463                 p->tcol->offset = mt->offset;
 464                 p->tcol->rmargin = p->maxrmargin;
 465                 break;
 466         default:
 467                 break;
 468         }
 469 }
 470
 471 static int
 472 pre_PP(DECL_ARGS)
 473 {
 474
 475         switch (n->type) {
 476         case ROFFT_BLOCK:
 477                 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
 478                 print_bvspace(p, n, mt->pardist);
 479                 break;
 480         default:
 481                 p->tcol->offset = mt->offset;
 482                 break;
 483         }
 484
 485         return n->type != ROFFT_HEAD;
 486 }
 487
 488 static int
 489 pre_IP(DECL_ARGS)
 490 {
 491         struct roffsu            su;
 492         const struct roff_node  *nn;
 493         int                      len, savelit;
 494
 495         switch (n->type) {
 496         case ROFFT_BODY:
 497                 p->flags |= TERMP_NOSPACE;
 498                 break;
 499         case ROFFT_HEAD:
 500                 p->flags |= TERMP_NOBREAK;
 501                 p->trailspace = 1;
 502                 break;
 503         case ROFFT_BLOCK:
 504                 print_bvspace(p, n, mt->pardist);
 505                 /* FALLTHROUGH */
 506         default:
 507                 return 1;
 508         }
 509
 510         /* Calculate the offset from the optional second argument. */
 511         if ((nn = n->parent->head->child) != NULL &&
 512             (nn = nn->next) != NULL &&
 513             a2roffsu(nn->string, &su, SCALE_EN)) {
 514                 len = term_hspan(p, &su) / 24;
 515                 if (len < 0 && (size_t)(-len) > mt->offset)
 516                         len = -mt->offset;
 517                 else if (len > SHRT_MAX)
 518                         len = term_len(p, p->defindent);
 519                 mt->lmargin[mt->lmargincur] = len;
 520         } else
 521                 len = mt->lmargin[mt->lmargincur];
 522
 523         switch (n->type) {
 524         case ROFFT_HEAD:
 525                 p->tcol->offset = mt->offset;
 526                 p->tcol->rmargin = mt->offset + len;
 527
 528                 savelit = MANT_LITERAL & mt->fl;
 529                 mt->fl &= ~MANT_LITERAL;
 530
 531                 if (n->child)
 532                         print_man_node(p, mt, n->child, meta);
 533
 534                 if (savelit)
 535                         mt->fl |= MANT_LITERAL;
 536
 537                 return 0;
 538         case ROFFT_BODY:
 539                 p->tcol->offset = mt->offset + len;
 540                 p->tcol->rmargin = p->maxrmargin;
 541                 break;
 542         default:
 543                 break;
 544         }
 545
 546         return 1;
 547 }
 548
 549 static void
 550 post_IP(DECL_ARGS)
 551 {
 552
 553         switch (n->type) {
 554         case ROFFT_HEAD:
 555                 term_flushln(p);
 556                 p->flags &= ~TERMP_NOBREAK;
 557                 p->trailspace = 0;
 558                 p->tcol->rmargin = p->maxrmargin;
 559                 break;
 560         case ROFFT_BODY:
 561                 term_newln(p);
 562                 p->tcol->offset = mt->offset;
 563                 break;
 564         default:
 565                 break;
 566         }
 567 }
 568
 569 static int
 570 pre_TP(DECL_ARGS)
 571 {
 572         struct roffsu            su;
 573         struct roff_node        *nn;
 574         int                      len, savelit;
 575
 576         switch (n->type) {
 577         case ROFFT_HEAD:
 578                 p->flags |= TERMP_NOBREAK | TERMP_BRTRSP;
 579                 p->trailspace = 1;
 580                 break;
 581         case ROFFT_BODY:
 582                 p->flags |= TERMP_NOSPACE;
 583                 break;
 584         case ROFFT_BLOCK:
 585                 print_bvspace(p, n, mt->pardist);
 586                 /* FALLTHROUGH */
 587         default:
 588                 return 1;
 589         }
 590
 591         /* Calculate offset. */
 592
 593         if ((nn = n->parent->head->child) != NULL &&
 594             nn->string != NULL && ! (NODE_LINE & nn->flags) &&
 595             a2roffsu(nn->string, &su, SCALE_EN)) {
 596                 len = term_hspan(p, &su) / 24;
 597                 if (len < 0 && (size_t)(-len) > mt->offset)
 598                         len = -mt->offset;
 599                 else if (len > SHRT_MAX)
 600                         len = term_len(p, p->defindent);
 601                 mt->lmargin[mt->lmargincur] = len;
 602         } else
 603                 len = mt->lmargin[mt->lmargincur];
 604
 605         switch (n->type) {
 606         case ROFFT_HEAD:
 607                 p->tcol->offset = mt->offset;
 608                 p->tcol->rmargin = mt->offset + len;
 609
 610                 savelit = MANT_LITERAL & mt->fl;
 611                 mt->fl &= ~MANT_LITERAL;
 612
 613                 /* Don't print same-line elements. */
 614                 nn = n->child;
 615                 while (NULL != nn && 0 == (NODE_LINE & nn->flags))
 616                         nn = nn->next;
 617
 618                 while (NULL != nn) {
 619                         print_man_node(p, mt, nn, meta);
 620                         nn = nn->next;
 621                 }
 622
 623                 if (savelit)
 624                         mt->fl |= MANT_LITERAL;
 625                 return 0;
 626         case ROFFT_BODY:
 627                 p->tcol->offset = mt->offset + len;
 628                 p->tcol->rmargin = p->maxrmargin;
 629                 p->trailspace = 0;
 630                 p->flags &= ~(TERMP_NOBREAK | TERMP_BRTRSP);
 631                 break;
 632         default:
 633                 break;
 634         }
 635
 636         return 1;
 637 }
 638
 639 static void
 640 post_TP(DECL_ARGS)
 641 {
 642
 643         switch (n->type) {
 644         case ROFFT_HEAD:
 645                 term_flushln(p);
 646                 break;
 647         case ROFFT_BODY:
 648                 term_newln(p);
 649                 p->tcol->offset = mt->offset;
 650                 break;
 651         default:
 652                 break;
 653         }
 654 }
 655
 656 static int
 657 pre_SS(DECL_ARGS)
 658 {
 659         int      i;
 660
 661         switch (n->type) {
 662         case ROFFT_BLOCK:
 663                 mt->fl &= ~MANT_LITERAL;
 664                 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
 665                 mt->offset = term_len(p, p->defindent);
 666
 667                 /*
 668                  * No vertical space before the first subsection
 669                  * and after an empty subsection.
 670                  */
 671
 672                 do {
 673                         n = n->prev;
 674                 } while (n != NULL && n->tok != TOKEN_NONE &&
 675                     termacts[n->tok].flags & MAN_NOTEXT);
 676                 if (n == NULL || (n->tok == MAN_SS && n->body->child == NULL))
 677                         break;
 678
 679                 for (i = 0; i < mt->pardist; i++)
 680                         term_vspace(p);
 681                 break;
 682         case ROFFT_HEAD:
 683                 term_fontrepl(p, TERMFONT_BOLD);
 684                 p->tcol->offset = term_len(p, 3);
 685                 p->tcol->rmargin = mt->offset;
 686                 p->trailspace = mt->offset;
 687                 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
 688                 break;
 689         case ROFFT_BODY:
 690                 p->tcol->offset = mt->offset;
 691                 p->tcol->rmargin = p->maxrmargin;
 692                 p->trailspace = 0;
 693                 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
 694                 break;
 695         default:
 696                 break;
 697         }
 698
 699         return 1;
 700 }
 701
 702 static void
 703 post_SS(DECL_ARGS)
 704 {
 705
 706         switch (n->type) {
 707         case ROFFT_HEAD:
 708                 term_newln(p);
 709                 break;
 710         case ROFFT_BODY:
 711                 term_newln(p);
 712                 break;
 713         default:
 714                 break;
 715         }
 716 }
 717
 718 static int
 719 pre_SH(DECL_ARGS)
 720 {
 721         int      i;
 722
 723         switch (n->type) {
 724         case ROFFT_BLOCK:
 725                 mt->fl &= ~MANT_LITERAL;
 726                 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
 727                 mt->offset = term_len(p, p->defindent);
 728
 729                 /*
 730                  * No vertical space before the first section
 731                  * and after an empty section.
 732                  */
 733
 734                 do {
 735                         n = n->prev;
 736                 } while (n != NULL && n->tok != TOKEN_NONE &&
 737                     termacts[n->tok].flags & MAN_NOTEXT);
 738                 if (n == NULL || (n->tok == MAN_SH && n->body->child == NULL))
 739                         break;
 740
 741                 for (i = 0; i < mt->pardist; i++)
 742                         term_vspace(p);
 743                 break;
 744         case ROFFT_HEAD:
 745                 term_fontrepl(p, TERMFONT_BOLD);
 746                 p->tcol->offset = 0;
 747                 p->tcol->rmargin = mt->offset;
 748                 p->trailspace = mt->offset;
 749                 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
 750                 break;
 751         case ROFFT_BODY:
 752                 p->tcol->offset = mt->offset;
 753                 p->tcol->rmargin = p->maxrmargin;
 754                 p->trailspace = 0;
 755                 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
 756                 break;
 757         default:
 758                 break;
 759         }
 760
 761         return 1;
 762 }
 763
 764 static void
 765 post_SH(DECL_ARGS)
 766 {
 767
 768         switch (n->type) {
 769         case ROFFT_HEAD:
 770                 term_newln(p);
 771                 break;
 772         case ROFFT_BODY:
 773                 term_newln(p);
 774                 break;
 775         default:
 776                 break;
 777         }
 778 }
 779
 780 static int
 781 pre_RS(DECL_ARGS)
 782 {
 783         struct roffsu    su;
 784
 785         switch (n->type) {
 786         case ROFFT_BLOCK:
 787                 term_newln(p);
 788                 return 1;
 789         case ROFFT_HEAD:
 790                 return 0;
 791         default:
 792                 break;
 793         }
 794
 795         n = n->parent->head;
 796         n->aux = SHRT_MAX + 1;
 797         if (n->child == NULL)
 798                 n->aux = mt->lmargin[mt->lmargincur];
 799         else if (a2roffsu(n->child->string, &su, SCALE_EN))
 800                 n->aux = term_hspan(p, &su) / 24;
 801         if (n->aux < 0 && (size_t)(-n->aux) > mt->offset)
 802                 n->aux = -mt->offset;
 803         else if (n->aux > SHRT_MAX)
 804                 n->aux = term_len(p, p->defindent);
 805
 806         mt->offset += n->aux;
 807         p->tcol->offset = mt->offset;
 808         p->tcol->rmargin = p->maxrmargin;
 809
 810         if (++mt->lmarginsz < MAXMARGINS)
 811                 mt->lmargincur = mt->lmarginsz;
 812
 813         mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
 814         return 1;
 815 }
 816
 817 static void
 818 post_RS(DECL_ARGS)
 819 {
 820
 821         switch (n->type) {
 822         case ROFFT_BLOCK:
 823                 return;
 824         case ROFFT_HEAD:
 825                 return;
 826         default:
 827                 term_newln(p);
 828                 break;
 829         }
 830
 831         mt->offset -= n->parent->head->aux;
 832         p->tcol->offset = mt->offset;
 833
 834         if (--mt->lmarginsz < MAXMARGINS)
 835                 mt->lmargincur = mt->lmarginsz;
 836 }
 837
 838 static int
 839 pre_UR(DECL_ARGS)
 840 {
 841
 842         return n->type != ROFFT_HEAD;
 843 }
 844
 845 static void
 846 post_UR(DECL_ARGS)
 847 {
 848
 849         if (n->type != ROFFT_BLOCK)
 850                 return;
 851
 852         term_word(p, "<");
 853         p->flags |= TERMP_NOSPACE;
 854
 855         if (NULL != n->child->child)
 856                 print_man_node(p, mt, n->child->child, meta);
 857
 858         p->flags |= TERMP_NOSPACE;
 859         term_word(p, ">");
 860 }
 861
 862 static void
 863 print_man_node(DECL_ARGS)
 864 {
 865         int              c;
 866
 867         switch (n->type) {
 868         case ROFFT_TEXT:
 869                 /*
 870                  * If we have a blank line, output a vertical space.
 871                  * If we have a space as the first character, break
 872                  * before printing the line's data.
 873                  */
 874                 if (*n->string == '\0') {
 875                         term_vspace(p);
 876                         return;
 877                 } else if (*n->string == ' ' && n->flags & NODE_LINE &&
 878                     (p->flags & TERMP_NONEWLINE) == 0)
 879                         term_newln(p);
 880
 881                 term_word(p, n->string);
 882                 goto out;
 883
 884         case ROFFT_EQN:
 885                 if ( ! (n->flags & NODE_LINE))
 886                         p->flags |= TERMP_NOSPACE;
 887                 term_eqn(p, n->eqn);
 888                 if (n->next != NULL && ! (n->next->flags & NODE_LINE))
 889                         p->flags |= TERMP_NOSPACE;
 890                 return;
 891         case ROFFT_TBL:
 892                 if (p->tbl.cols == NULL)
 893                         term_vspace(p);
 894                 term_tbl(p, n->span);
 895                 return;
 896         default:
 897                 break;
 898         }
 899
 900         if (n->tok < ROFF_MAX) {
 901                 roff_term_pre(p, n);
 902                 return;
 903         }
 904
 905         assert(n->tok >= MAN_TH && n->tok <= MAN_MAX);
 906         if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
 907                 term_fontrepl(p, TERMFONT_NONE);
 908
 909         c = 1;
 910         if (termacts[n->tok].pre)
 911                 c = (*termacts[n->tok].pre)(p, mt, n, meta);
 912
 913         if (c && n->child)
 914                 print_man_nodelist(p, mt, n->child, meta);
 915
 916         if (termacts[n->tok].post)
 917                 (*termacts[n->tok].post)(p, mt, n, meta);
 918         if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
 919                 term_fontrepl(p, TERMFONT_NONE);
 920
 921 out:
 922         /*
 923          * If we're in a literal context, make sure that words
 924          * together on the same line stay together.  This is a
 925          * POST-printing call, so we check the NEXT word.  Since
 926          * -man doesn't have nested macros, we don't need to be
 927          * more specific than this.
 928          */
 929         if (mt->fl & MANT_LITERAL &&
 930             ! (p->flags & (TERMP_NOBREAK | TERMP_NONEWLINE)) &&
 931             (n->next == NULL || n->next->flags & NODE_LINE)) {
 932                 p->flags |= TERMP_BRNEVER | TERMP_NOSPACE;
 933                 if (n->string != NULL && *n->string != '\0')
 934                         term_flushln(p);
 935                 else
 936                         term_newln(p);
 937                 p->flags &= ~TERMP_BRNEVER;
 938                 if (p->tcol->rmargin < p->maxrmargin &&
 939                     n->parent->tok == MAN_HP) {
 940                         p->tcol->offset = p->tcol->rmargin;
 941                         p->tcol->rmargin = p->maxrmargin;
 942                 }
 943         }
 944         if (NODE_EOS & n->flags)
 945                 p->flags |= TERMP_SENTENCE;
 946 }
 947
 948
 949 static void
 950 print_man_nodelist(DECL_ARGS)
 951 {
 952
 953         while (n != NULL) {
 954                 print_man_node(p, mt, n, meta);
 955                 n = n->next;
 956         }
 957 }
 958
 959 static void
 960 print_man_foot(struct termp *p, const struct roff_meta *meta)
 961 {
 962         char                    *title;
 963         size_t                   datelen, titlen;
 964
 965         assert(meta->title);
 966         assert(meta->msec);
 967         assert(meta->date);
 968
 969         term_fontrepl(p, TERMFONT_NONE);
 970
 971         if (meta->hasbody)
 972                 term_vspace(p);
 973
 974         /*
 975          * Temporary, undocumented option to imitate mdoc(7) output.
 976          * In the bottom right corner, use the operating system
 977          * instead of the title.
 978          */
 979
 980         if ( ! p->mdocstyle) {
 981                 if (meta->hasbody) {
 982                         term_vspace(p);
 983                         term_vspace(p);
 984                 }
 985                 mandoc_asprintf(&title, "%s(%s)",
 986                     meta->title, meta->msec);
 987         } else if (meta->os) {
 988                 title = mandoc_strdup(meta->os);
 989         } else {
 990                 title = mandoc_strdup("");
 991         }
 992         datelen = term_strlen(p, meta->date);
 993
 994         /* Bottom left corner: operating system. */
 995
 996         p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
 997         p->trailspace = 1;
 998         p->tcol->offset = 0;
 999         p->tcol->rmargin = p->maxrmargin > datelen ?
1000             (p->maxrmargin + term_len(p, 1) - datelen) / 2 : 0;
1001
1002         if (meta->os)
1003                 term_word(p, meta->os);
1004         term_flushln(p);
1005
1006         /* At the bottom in the middle: manual date. */
1007
1008         p->tcol->offset = p->tcol->rmargin;
1009         titlen = term_strlen(p, title);
1010         p->tcol->rmargin = p->maxrmargin > titlen ?
1011             p->maxrmargin - titlen : 0;
1012         p->flags |= TERMP_NOSPACE;
1013
1014         term_word(p, meta->date);
1015         term_flushln(p);
1016
1017         /* Bottom right corner: manual title and section. */
1018
1019         p->flags &= ~TERMP_NOBREAK;
1020         p->flags |= TERMP_NOSPACE;
1021         p->trailspace = 0;
1022         p->tcol->offset = p->tcol->rmargin;
1023         p->tcol->rmargin = p->maxrmargin;
1024
1025         term_word(p, title);
1026         term_flushln(p);
1027         free(title);
1028 }
1029
1030 static void
1031 print_man_head(struct termp *p, const struct roff_meta *meta)
1032 {
1033         const char              *volume;
1034         char                    *title;
1035         size_t                   vollen, titlen;
1036
1037         assert(meta->title);
1038         assert(meta->msec);
1039
1040         volume = NULL == meta->vol ? "" : meta->vol;
1041         vollen = term_strlen(p, volume);
1042
1043         /* Top left corner: manual title and section. */
1044
1045         mandoc_asprintf(&title, "%s(%s)", meta->title, meta->msec);
1046         titlen = term_strlen(p, title);
1047
1048         p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
1049         p->trailspace = 1;
1050         p->tcol->offset = 0;
1051         p->tcol->rmargin = 2 * (titlen+1) + vollen < p->maxrmargin ?
1052             (p->maxrmargin - vollen + term_len(p, 1)) / 2 :
1053             vollen < p->maxrmargin ? p->maxrmargin - vollen : 0;
1054
1055         term_word(p, title);
1056         term_flushln(p);
1057
1058         /* At the top in the middle: manual volume. */
1059
1060         p->flags |= TERMP_NOSPACE;
1061         p->tcol->offset = p->tcol->rmargin;
1062         p->tcol->rmargin = p->tcol->offset + vollen + titlen <
1063             p->maxrmargin ?  p->maxrmargin - titlen : p->maxrmargin;
1064
1065         term_word(p, volume);
1066         term_flushln(p);
1067
1068         /* Top right corner: title and section, again. */
1069
1070         p->flags &= ~TERMP_NOBREAK;
1071         p->trailspace = 0;
1072         if (p->tcol->rmargin + titlen <= p->maxrmargin) {
1073                 p->flags |= TERMP_NOSPACE;
1074                 p->tcol->offset = p->tcol->rmargin;
1075                 p->tcol->rmargin = p->maxrmargin;
1076                 term_word(p, title);
1077                 term_flushln(p);
1078         }
1079
1080         p->flags &= ~TERMP_NOSPACE;
1081         p->tcol->offset = 0;
1082         p->tcol->rmargin = p->maxrmargin;
1083
1084         /*
1085          * Groff prints three blank lines before the content.
1086          * Do the same, except in the temporary, undocumented
1087          * mode imitating mdoc(7) output.
1088          */
1089
1090         term_vspace(p);
1091         if ( ! p->mdocstyle) {
1092                 term_vspace(p);
1093                 term_vspace(p);
1094         }
1095         free(title);
1096 }