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Partial implementation of \h (horizontal line drawing function).
[mandoc.git] / mdoc_term.c
1 /* $Id: mdoc_term.c,v 1.359 2017/06/01 19:05:37 schwarze Exp $ */
2 /*
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2010, 2012-2017 Ingo Schwarze <schwarze@openbsd.org>
5 * Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19 #include "config.h"
20
21 #include <sys/types.h>
22
23 #include <assert.h>
24 #include <ctype.h>
25 #include <limits.h>
26 #include <stdint.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30
31 #include "mandoc_aux.h"
32 #include "mandoc.h"
33 #include "roff.h"
34 #include "mdoc.h"
35 #include "out.h"
36 #include "term.h"
37 #include "tag.h"
38 #include "main.h"
39
40 struct termpair {
41 struct termpair *ppair;
42 int count;
43 };
44
45 #define DECL_ARGS struct termp *p, \
46 struct termpair *pair, \
47 const struct roff_meta *meta, \
48 struct roff_node *n
49
50 struct termact {
51 int (*pre)(DECL_ARGS);
52 void (*post)(DECL_ARGS);
53 };
54
55 static int a2width(const struct termp *, const char *);
56
57 static void print_bvspace(struct termp *,
58 const struct roff_node *,
59 const struct roff_node *);
60 static void print_mdoc_node(DECL_ARGS);
61 static void print_mdoc_nodelist(DECL_ARGS);
62 static void print_mdoc_head(struct termp *, const struct roff_meta *);
63 static void print_mdoc_foot(struct termp *, const struct roff_meta *);
64 static void synopsis_pre(struct termp *,
65 const struct roff_node *);
66
67 static void termp____post(DECL_ARGS);
68 static void termp__t_post(DECL_ARGS);
69 static void termp_bd_post(DECL_ARGS);
70 static void termp_bk_post(DECL_ARGS);
71 static void termp_bl_post(DECL_ARGS);
72 static void termp_eo_post(DECL_ARGS);
73 static void termp_fd_post(DECL_ARGS);
74 static void termp_fo_post(DECL_ARGS);
75 static void termp_in_post(DECL_ARGS);
76 static void termp_it_post(DECL_ARGS);
77 static void termp_lb_post(DECL_ARGS);
78 static void termp_nm_post(DECL_ARGS);
79 static void termp_pf_post(DECL_ARGS);
80 static void termp_quote_post(DECL_ARGS);
81 static void termp_sh_post(DECL_ARGS);
82 static void termp_ss_post(DECL_ARGS);
83 static void termp_xx_post(DECL_ARGS);
84
85 static int termp__a_pre(DECL_ARGS);
86 static int termp__t_pre(DECL_ARGS);
87 static int termp_an_pre(DECL_ARGS);
88 static int termp_ap_pre(DECL_ARGS);
89 static int termp_bd_pre(DECL_ARGS);
90 static int termp_bf_pre(DECL_ARGS);
91 static int termp_bk_pre(DECL_ARGS);
92 static int termp_bl_pre(DECL_ARGS);
93 static int termp_bold_pre(DECL_ARGS);
94 static int termp_cd_pre(DECL_ARGS);
95 static int termp_d1_pre(DECL_ARGS);
96 static int termp_eo_pre(DECL_ARGS);
97 static int termp_em_pre(DECL_ARGS);
98 static int termp_er_pre(DECL_ARGS);
99 static int termp_ex_pre(DECL_ARGS);
100 static int termp_fa_pre(DECL_ARGS);
101 static int termp_fd_pre(DECL_ARGS);
102 static int termp_fl_pre(DECL_ARGS);
103 static int termp_fn_pre(DECL_ARGS);
104 static int termp_fo_pre(DECL_ARGS);
105 static int termp_ft_pre(DECL_ARGS);
106 static int termp_in_pre(DECL_ARGS);
107 static int termp_it_pre(DECL_ARGS);
108 static int termp_li_pre(DECL_ARGS);
109 static int termp_lk_pre(DECL_ARGS);
110 static int termp_nd_pre(DECL_ARGS);
111 static int termp_nm_pre(DECL_ARGS);
112 static int termp_ns_pre(DECL_ARGS);
113 static int termp_quote_pre(DECL_ARGS);
114 static int termp_rs_pre(DECL_ARGS);
115 static int termp_sh_pre(DECL_ARGS);
116 static int termp_skip_pre(DECL_ARGS);
117 static int termp_sm_pre(DECL_ARGS);
118 static int termp_pp_pre(DECL_ARGS);
119 static int termp_ss_pre(DECL_ARGS);
120 static int termp_sy_pre(DECL_ARGS);
121 static int termp_tag_pre(DECL_ARGS);
122 static int termp_under_pre(DECL_ARGS);
123 static int termp_vt_pre(DECL_ARGS);
124 static int termp_xr_pre(DECL_ARGS);
125 static int termp_xx_pre(DECL_ARGS);
126
127 static const struct termact __termacts[MDOC_MAX - MDOC_Dd] = {
128 { NULL, NULL }, /* Dd */
129 { NULL, NULL }, /* Dt */
130 { NULL, NULL }, /* Os */
131 { termp_sh_pre, termp_sh_post }, /* Sh */
132 { termp_ss_pre, termp_ss_post }, /* Ss */
133 { termp_pp_pre, NULL }, /* Pp */
134 { termp_d1_pre, termp_bl_post }, /* D1 */
135 { termp_d1_pre, termp_bl_post }, /* Dl */
136 { termp_bd_pre, termp_bd_post }, /* Bd */
137 { NULL, NULL }, /* Ed */
138 { termp_bl_pre, termp_bl_post }, /* Bl */
139 { NULL, NULL }, /* El */
140 { termp_it_pre, termp_it_post }, /* It */
141 { termp_under_pre, NULL }, /* Ad */
142 { termp_an_pre, NULL }, /* An */
143 { termp_ap_pre, NULL }, /* Ap */
144 { termp_under_pre, NULL }, /* Ar */
145 { termp_cd_pre, NULL }, /* Cd */
146 { termp_bold_pre, NULL }, /* Cm */
147 { termp_li_pre, NULL }, /* Dv */
148 { termp_er_pre, NULL }, /* Er */
149 { termp_tag_pre, NULL }, /* Ev */
150 { termp_ex_pre, NULL }, /* Ex */
151 { termp_fa_pre, NULL }, /* Fa */
152 { termp_fd_pre, termp_fd_post }, /* Fd */
153 { termp_fl_pre, NULL }, /* Fl */
154 { termp_fn_pre, NULL }, /* Fn */
155 { termp_ft_pre, NULL }, /* Ft */
156 { termp_bold_pre, NULL }, /* Ic */
157 { termp_in_pre, termp_in_post }, /* In */
158 { termp_li_pre, NULL }, /* Li */
159 { termp_nd_pre, NULL }, /* Nd */
160 { termp_nm_pre, termp_nm_post }, /* Nm */
161 { termp_quote_pre, termp_quote_post }, /* Op */
162 { termp_ft_pre, NULL }, /* Ot */
163 { termp_under_pre, NULL }, /* Pa */
164 { termp_ex_pre, NULL }, /* Rv */
165 { NULL, NULL }, /* St */
166 { termp_under_pre, NULL }, /* Va */
167 { termp_vt_pre, NULL }, /* Vt */
168 { termp_xr_pre, NULL }, /* Xr */
169 { termp__a_pre, termp____post }, /* %A */
170 { termp_under_pre, termp____post }, /* %B */
171 { NULL, termp____post }, /* %D */
172 { termp_under_pre, termp____post }, /* %I */
173 { termp_under_pre, termp____post }, /* %J */
174 { NULL, termp____post }, /* %N */
175 { NULL, termp____post }, /* %O */
176 { NULL, termp____post }, /* %P */
177 { NULL, termp____post }, /* %R */
178 { termp__t_pre, termp__t_post }, /* %T */
179 { NULL, termp____post }, /* %V */
180 { NULL, NULL }, /* Ac */
181 { termp_quote_pre, termp_quote_post }, /* Ao */
182 { termp_quote_pre, termp_quote_post }, /* Aq */
183 { NULL, NULL }, /* At */
184 { NULL, NULL }, /* Bc */
185 { termp_bf_pre, NULL }, /* Bf */
186 { termp_quote_pre, termp_quote_post }, /* Bo */
187 { termp_quote_pre, termp_quote_post }, /* Bq */
188 { termp_xx_pre, termp_xx_post }, /* Bsx */
189 { NULL, NULL }, /* Bx */
190 { termp_skip_pre, NULL }, /* Db */
191 { NULL, NULL }, /* Dc */
192 { termp_quote_pre, termp_quote_post }, /* Do */
193 { termp_quote_pre, termp_quote_post }, /* Dq */
194 { NULL, NULL }, /* Ec */ /* FIXME: no space */
195 { NULL, NULL }, /* Ef */
196 { termp_em_pre, NULL }, /* Em */
197 { termp_eo_pre, termp_eo_post }, /* Eo */
198 { termp_xx_pre, termp_xx_post }, /* Fx */
199 { termp_bold_pre, NULL }, /* Ms */
200 { termp_li_pre, NULL }, /* No */
201 { termp_ns_pre, NULL }, /* Ns */
202 { termp_xx_pre, termp_xx_post }, /* Nx */
203 { termp_xx_pre, termp_xx_post }, /* Ox */
204 { NULL, NULL }, /* Pc */
205 { NULL, termp_pf_post }, /* Pf */
206 { termp_quote_pre, termp_quote_post }, /* Po */
207 { termp_quote_pre, termp_quote_post }, /* Pq */
208 { NULL, NULL }, /* Qc */
209 { termp_quote_pre, termp_quote_post }, /* Ql */
210 { termp_quote_pre, termp_quote_post }, /* Qo */
211 { termp_quote_pre, termp_quote_post }, /* Qq */
212 { NULL, NULL }, /* Re */
213 { termp_rs_pre, NULL }, /* Rs */
214 { NULL, NULL }, /* Sc */
215 { termp_quote_pre, termp_quote_post }, /* So */
216 { termp_quote_pre, termp_quote_post }, /* Sq */
217 { termp_sm_pre, NULL }, /* Sm */
218 { termp_under_pre, NULL }, /* Sx */
219 { termp_sy_pre, NULL }, /* Sy */
220 { NULL, NULL }, /* Tn */
221 { termp_xx_pre, termp_xx_post }, /* Ux */
222 { NULL, NULL }, /* Xc */
223 { NULL, NULL }, /* Xo */
224 { termp_fo_pre, termp_fo_post }, /* Fo */
225 { NULL, NULL }, /* Fc */
226 { termp_quote_pre, termp_quote_post }, /* Oo */
227 { NULL, NULL }, /* Oc */
228 { termp_bk_pre, termp_bk_post }, /* Bk */
229 { NULL, NULL }, /* Ek */
230 { NULL, NULL }, /* Bt */
231 { NULL, NULL }, /* Hf */
232 { termp_under_pre, NULL }, /* Fr */
233 { NULL, NULL }, /* Ud */
234 { NULL, termp_lb_post }, /* Lb */
235 { termp_pp_pre, NULL }, /* Lp */
236 { termp_lk_pre, NULL }, /* Lk */
237 { termp_under_pre, NULL }, /* Mt */
238 { termp_quote_pre, termp_quote_post }, /* Brq */
239 { termp_quote_pre, termp_quote_post }, /* Bro */
240 { NULL, NULL }, /* Brc */
241 { NULL, termp____post }, /* %C */
242 { termp_skip_pre, NULL }, /* Es */
243 { termp_quote_pre, termp_quote_post }, /* En */
244 { termp_xx_pre, termp_xx_post }, /* Dx */
245 { NULL, termp____post }, /* %Q */
246 { NULL, termp____post }, /* %U */
247 { NULL, NULL }, /* Ta */
248 };
249 static const struct termact *const termacts = __termacts - MDOC_Dd;
250
251 static int fn_prio;
252
253
254 void
255 terminal_mdoc(void *arg, const struct roff_man *mdoc)
256 {
257 struct roff_node *n;
258 struct termp *p;
259 size_t save_defindent;
260
261 p = (struct termp *)arg;
262 p->overstep = 0;
263 p->rmargin = p->maxrmargin = p->defrmargin;
264 term_tab_set(p, NULL);
265 term_tab_set(p, "T");
266 term_tab_set(p, ".5i");
267
268 n = mdoc->first->child;
269 if (p->synopsisonly) {
270 while (n != NULL) {
271 if (n->tok == MDOC_Sh && n->sec == SEC_SYNOPSIS) {
272 if (n->child->next->child != NULL)
273 print_mdoc_nodelist(p, NULL,
274 &mdoc->meta,
275 n->child->next->child);
276 term_newln(p);
277 break;
278 }
279 n = n->next;
280 }
281 } else {
282 save_defindent = p->defindent;
283 if (p->defindent == 0)
284 p->defindent = 5;
285 term_begin(p, print_mdoc_head, print_mdoc_foot,
286 &mdoc->meta);
287 while (n != NULL && n->flags & NODE_NOPRT)
288 n = n->next;
289 if (n != NULL) {
290 if (n->tok != MDOC_Sh)
291 term_vspace(p);
292 print_mdoc_nodelist(p, NULL, &mdoc->meta, n);
293 }
294 term_end(p);
295 p->defindent = save_defindent;
296 }
297 }
298
299 static void
300 print_mdoc_nodelist(DECL_ARGS)
301 {
302
303 while (n != NULL) {
304 print_mdoc_node(p, pair, meta, n);
305 n = n->next;
306 }
307 }
308
309 static void
310 print_mdoc_node(DECL_ARGS)
311 {
312 int chld;
313 struct termpair npair;
314 size_t offset, rmargin;
315
316 if (n->flags & NODE_NOPRT)
317 return;
318
319 chld = 1;
320 offset = p->offset;
321 rmargin = p->rmargin;
322 n->flags &= ~NODE_ENDED;
323 n->prev_font = p->fonti;
324
325 memset(&npair, 0, sizeof(struct termpair));
326 npair.ppair = pair;
327
328 /*
329 * Keeps only work until the end of a line. If a keep was
330 * invoked in a prior line, revert it to PREKEEP.
331 */
332
333 if (p->flags & TERMP_KEEP && n->flags & NODE_LINE) {
334 p->flags &= ~TERMP_KEEP;
335 p->flags |= TERMP_PREKEEP;
336 }
337
338 /*
339 * After the keep flags have been set up, we may now
340 * produce output. Note that some pre-handlers do so.
341 */
342
343 switch (n->type) {
344 case ROFFT_TEXT:
345 if (*n->string == ' ' && n->flags & NODE_LINE &&
346 (p->flags & TERMP_NONEWLINE) == 0)
347 term_newln(p);
348 if (NODE_DELIMC & n->flags)
349 p->flags |= TERMP_NOSPACE;
350 term_word(p, n->string);
351 if (NODE_DELIMO & n->flags)
352 p->flags |= TERMP_NOSPACE;
353 break;
354 case ROFFT_EQN:
355 if ( ! (n->flags & NODE_LINE))
356 p->flags |= TERMP_NOSPACE;
357 term_eqn(p, n->eqn);
358 if (n->next != NULL && ! (n->next->flags & NODE_LINE))
359 p->flags |= TERMP_NOSPACE;
360 break;
361 case ROFFT_TBL:
362 if (p->tbl.cols == NULL)
363 term_newln(p);
364 term_tbl(p, n->span);
365 break;
366 default:
367 if (n->tok < ROFF_MAX) {
368 roff_term_pre(p, n);
369 return;
370 }
371 assert(n->tok >= MDOC_Dd && n->tok < MDOC_MAX);
372 if (termacts[n->tok].pre != NULL &&
373 (n->end == ENDBODY_NOT || n->child != NULL))
374 chld = (*termacts[n->tok].pre)
375 (p, &npair, meta, n);
376 break;
377 }
378
379 if (chld && n->child)
380 print_mdoc_nodelist(p, &npair, meta, n->child);
381
382 term_fontpopq(p,
383 (ENDBODY_NOT == n->end ? n : n->body)->prev_font);
384
385 switch (n->type) {
386 case ROFFT_TEXT:
387 break;
388 case ROFFT_TBL:
389 break;
390 case ROFFT_EQN:
391 break;
392 default:
393 if (termacts[n->tok].post == NULL || n->flags & NODE_ENDED)
394 break;
395 (void)(*termacts[n->tok].post)(p, &npair, meta, n);
396
397 /*
398 * Explicit end tokens not only call the post
399 * handler, but also tell the respective block
400 * that it must not call the post handler again.
401 */
402 if (ENDBODY_NOT != n->end)
403 n->body->flags |= NODE_ENDED;
404 break;
405 }
406
407 if (NODE_EOS & n->flags)
408 p->flags |= TERMP_SENTENCE;
409
410 if (n->type != ROFFT_TEXT)
411 p->offset = offset;
412 p->rmargin = rmargin;
413 }
414
415 static void
416 print_mdoc_foot(struct termp *p, const struct roff_meta *meta)
417 {
418 size_t sz;
419
420 term_fontrepl(p, TERMFONT_NONE);
421
422 /*
423 * Output the footer in new-groff style, that is, three columns
424 * with the middle being the manual date and flanking columns
425 * being the operating system:
426 *
427 * SYSTEM DATE SYSTEM
428 */
429
430 term_vspace(p);
431
432 p->offset = 0;
433 sz = term_strlen(p, meta->date);
434 p->rmargin = p->maxrmargin > sz ?
435 (p->maxrmargin + term_len(p, 1) - sz) / 2 : 0;
436 p->trailspace = 1;
437 p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
438
439 term_word(p, meta->os);
440 term_flushln(p);
441
442 p->offset = p->rmargin;
443 sz = term_strlen(p, meta->os);
444 p->rmargin = p->maxrmargin > sz ? p->maxrmargin - sz : 0;
445 p->flags |= TERMP_NOSPACE;
446
447 term_word(p, meta->date);
448 term_flushln(p);
449
450 p->offset = p->rmargin;
451 p->rmargin = p->maxrmargin;
452 p->trailspace = 0;
453 p->flags &= ~TERMP_NOBREAK;
454 p->flags |= TERMP_NOSPACE;
455
456 term_word(p, meta->os);
457 term_flushln(p);
458
459 p->offset = 0;
460 p->rmargin = p->maxrmargin;
461 p->flags = 0;
462 }
463
464 static void
465 print_mdoc_head(struct termp *p, const struct roff_meta *meta)
466 {
467 char *volume, *title;
468 size_t vollen, titlen;
469
470 /*
471 * The header is strange. It has three components, which are
472 * really two with the first duplicated. It goes like this:
473 *
474 * IDENTIFIER TITLE IDENTIFIER
475 *
476 * The IDENTIFIER is NAME(SECTION), which is the command-name
477 * (if given, or "unknown" if not) followed by the manual page
478 * section. These are given in `Dt'. The TITLE is a free-form
479 * string depending on the manual volume. If not specified, it
480 * switches on the manual section.
481 */
482
483 assert(meta->vol);
484 if (NULL == meta->arch)
485 volume = mandoc_strdup(meta->vol);
486 else
487 mandoc_asprintf(&volume, "%s (%s)",
488 meta->vol, meta->arch);
489 vollen = term_strlen(p, volume);
490
491 if (NULL == meta->msec)
492 title = mandoc_strdup(meta->title);
493 else
494 mandoc_asprintf(&title, "%s(%s)",
495 meta->title, meta->msec);
496 titlen = term_strlen(p, title);
497
498 p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
499 p->trailspace = 1;
500 p->offset = 0;
501 p->rmargin = 2 * (titlen+1) + vollen < p->maxrmargin ?
502 (p->maxrmargin - vollen + term_len(p, 1)) / 2 :
503 vollen < p->maxrmargin ? p->maxrmargin - vollen : 0;
504
505 term_word(p, title);
506 term_flushln(p);
507
508 p->flags |= TERMP_NOSPACE;
509 p->offset = p->rmargin;
510 p->rmargin = p->offset + vollen + titlen < p->maxrmargin ?
511 p->maxrmargin - titlen : p->maxrmargin;
512
513 term_word(p, volume);
514 term_flushln(p);
515
516 p->flags &= ~TERMP_NOBREAK;
517 p->trailspace = 0;
518 if (p->rmargin + titlen <= p->maxrmargin) {
519 p->flags |= TERMP_NOSPACE;
520 p->offset = p->rmargin;
521 p->rmargin = p->maxrmargin;
522 term_word(p, title);
523 term_flushln(p);
524 }
525
526 p->flags &= ~TERMP_NOSPACE;
527 p->offset = 0;
528 p->rmargin = p->maxrmargin;
529 free(title);
530 free(volume);
531 }
532
533 static int
534 a2width(const struct termp *p, const char *v)
535 {
536 struct roffsu su;
537
538 if (a2roffsu(v, &su, SCALE_MAX) < 2) {
539 SCALE_HS_INIT(&su, term_strlen(p, v));
540 su.scale /= term_strlen(p, "0");
541 }
542 return term_hspan(p, &su) / 24;
543 }
544
545 /*
546 * Determine how much space to print out before block elements of `It'
547 * (and thus `Bl') and `Bd'. And then go ahead and print that space,
548 * too.
549 */
550 static void
551 print_bvspace(struct termp *p,
552 const struct roff_node *bl,
553 const struct roff_node *n)
554 {
555 const struct roff_node *nn;
556
557 assert(n);
558
559 term_newln(p);
560
561 if (MDOC_Bd == bl->tok && bl->norm->Bd.comp)
562 return;
563 if (MDOC_Bl == bl->tok && bl->norm->Bl.comp)
564 return;
565
566 /* Do not vspace directly after Ss/Sh. */
567
568 nn = n;
569 while (nn->prev != NULL && nn->prev->flags & NODE_NOPRT)
570 nn = nn->prev;
571 while (nn->prev == NULL) {
572 do {
573 nn = nn->parent;
574 if (nn->type == ROFFT_ROOT)
575 return;
576 } while (nn->type != ROFFT_BLOCK);
577 if (nn->tok == MDOC_Sh || nn->tok == MDOC_Ss)
578 return;
579 if (nn->tok == MDOC_It &&
580 nn->parent->parent->norm->Bl.type != LIST_item)
581 break;
582 }
583
584 /* A `-column' does not assert vspace within the list. */
585
586 if (MDOC_Bl == bl->tok && LIST_column == bl->norm->Bl.type)
587 if (n->prev && MDOC_It == n->prev->tok)
588 return;
589
590 /* A `-diag' without body does not vspace. */
591
592 if (MDOC_Bl == bl->tok && LIST_diag == bl->norm->Bl.type)
593 if (n->prev && MDOC_It == n->prev->tok) {
594 assert(n->prev->body);
595 if (NULL == n->prev->body->child)
596 return;
597 }
598
599 term_vspace(p);
600 }
601
602
603 static int
604 termp_it_pre(DECL_ARGS)
605 {
606 struct roffsu su;
607 char buf[24];
608 const struct roff_node *bl, *nn;
609 size_t ncols, dcol;
610 int i, offset, width;
611 enum mdoc_list type;
612
613 if (n->type == ROFFT_BLOCK) {
614 print_bvspace(p, n->parent->parent, n);
615 return 1;
616 }
617
618 bl = n->parent->parent->parent;
619 type = bl->norm->Bl.type;
620
621 /*
622 * Defaults for specific list types.
623 */
624
625 switch (type) {
626 case LIST_bullet:
627 case LIST_dash:
628 case LIST_hyphen:
629 case LIST_enum:
630 width = term_len(p, 2);
631 break;
632 case LIST_hang:
633 case LIST_tag:
634 width = term_len(p, 8);
635 break;
636 case LIST_column:
637 width = term_len(p, 10);
638 break;
639 default:
640 width = 0;
641 break;
642 }
643 offset = 0;
644
645 /*
646 * First calculate width and offset. This is pretty easy unless
647 * we're a -column list, in which case all prior columns must
648 * be accounted for.
649 */
650
651 if (bl->norm->Bl.offs != NULL) {
652 offset = a2width(p, bl->norm->Bl.offs);
653 if (offset < 0 && (size_t)(-offset) > p->offset)
654 offset = -p->offset;
655 else if (offset > SHRT_MAX)
656 offset = 0;
657 }
658
659 switch (type) {
660 case LIST_column:
661 if (n->type == ROFFT_HEAD)
662 break;
663
664 /*
665 * Imitate groff's column handling:
666 * - For each earlier column, add its width.
667 * - For less than 5 columns, add four more blanks per
668 * column.
669 * - For exactly 5 columns, add three more blank per
670 * column.
671 * - For more than 5 columns, add only one column.
672 */
673 ncols = bl->norm->Bl.ncols;
674 dcol = ncols < 5 ? term_len(p, 4) :
675 ncols == 5 ? term_len(p, 3) : term_len(p, 1);
676
677 /*
678 * Calculate the offset by applying all prior ROFFT_BODY,
679 * so we stop at the ROFFT_HEAD (nn->prev == NULL).
680 */
681
682 for (i = 0, nn = n->prev;
683 nn->prev && i < (int)ncols;
684 nn = nn->prev, i++) {
685 SCALE_HS_INIT(&su,
686 term_strlen(p, bl->norm->Bl.cols[i]));
687 su.scale /= term_strlen(p, "0");
688 offset += term_hspan(p, &su) / 24 + dcol;
689 }
690
691 /*
692 * When exceeding the declared number of columns, leave
693 * the remaining widths at 0. This will later be
694 * adjusted to the default width of 10, or, for the last
695 * column, stretched to the right margin.
696 */
697 if (i >= (int)ncols)
698 break;
699
700 /*
701 * Use the declared column widths, extended as explained
702 * in the preceding paragraph.
703 */
704 SCALE_HS_INIT(&su, term_strlen(p, bl->norm->Bl.cols[i]));
705 su.scale /= term_strlen(p, "0");
706 width = term_hspan(p, &su) / 24 + dcol;
707 break;
708 default:
709 if (NULL == bl->norm->Bl.width)
710 break;
711
712 /*
713 * Note: buffer the width by 2, which is groff's magic
714 * number for buffering single arguments. See the above
715 * handling for column for how this changes.
716 */
717 width = a2width(p, bl->norm->Bl.width) + term_len(p, 2);
718 if (width < 0 && (size_t)(-width) > p->offset)
719 width = -p->offset;
720 else if (width > SHRT_MAX)
721 width = 0;
722 break;
723 }
724
725 /*
726 * Whitespace control. Inset bodies need an initial space,
727 * while diagonal bodies need two.
728 */
729
730 p->flags |= TERMP_NOSPACE;
731
732 switch (type) {
733 case LIST_diag:
734 if (n->type == ROFFT_BODY)
735 term_word(p, "\\ \\ ");
736 break;
737 case LIST_inset:
738 if (n->type == ROFFT_BODY && n->parent->head->child != NULL)
739 term_word(p, "\\ ");
740 break;
741 default:
742 break;
743 }
744
745 p->flags |= TERMP_NOSPACE;
746
747 switch (type) {
748 case LIST_diag:
749 if (n->type == ROFFT_HEAD)
750 term_fontpush(p, TERMFONT_BOLD);
751 break;
752 default:
753 break;
754 }
755
756 /*
757 * Pad and break control. This is the tricky part. These flags
758 * are documented in term_flushln() in term.c. Note that we're
759 * going to unset all of these flags in termp_it_post() when we
760 * exit.
761 */
762
763 switch (type) {
764 case LIST_enum:
765 case LIST_bullet:
766 case LIST_dash:
767 case LIST_hyphen:
768 /*
769 * Weird special case.
770 * Some very narrow lists actually hang.
771 */
772 if (width <= (int)term_len(p, 2))
773 p->flags |= TERMP_HANG;
774 if (n->type != ROFFT_HEAD)
775 break;
776 p->flags |= TERMP_NOBREAK;
777 p->trailspace = 1;
778 break;
779 case LIST_hang:
780 if (n->type != ROFFT_HEAD)
781 break;
782
783 /*
784 * This is ugly. If `-hang' is specified and the body
785 * is a `Bl' or `Bd', then we want basically to nullify
786 * the "overstep" effect in term_flushln() and treat
787 * this as a `-ohang' list instead.
788 */
789 if (NULL != n->next &&
790 NULL != n->next->child &&
791 (MDOC_Bl == n->next->child->tok ||
792 MDOC_Bd == n->next->child->tok))
793 break;
794
795 p->flags |= TERMP_NOBREAK | TERMP_BRIND | TERMP_HANG;
796 p->trailspace = 1;
797 break;
798 case LIST_tag:
799 if (n->type != ROFFT_HEAD)
800 break;
801
802 p->flags |= TERMP_NOBREAK | TERMP_BRTRSP | TERMP_BRIND;
803 p->trailspace = 2;
804
805 if (NULL == n->next || NULL == n->next->child)
806 p->flags |= TERMP_DANGLE;
807 break;
808 case LIST_column:
809 if (n->type == ROFFT_HEAD)
810 break;
811
812 if (NULL == n->next) {
813 p->flags &= ~TERMP_NOBREAK;
814 p->trailspace = 0;
815 } else {
816 p->flags |= TERMP_NOBREAK;
817 p->trailspace = 1;
818 }
819
820 break;
821 case LIST_diag:
822 if (n->type != ROFFT_HEAD)
823 break;
824 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
825 p->trailspace = 1;
826 break;
827 default:
828 break;
829 }
830
831 /*
832 * Margin control. Set-head-width lists have their right
833 * margins shortened. The body for these lists has the offset
834 * necessarily lengthened. Everybody gets the offset.
835 */
836
837 p->offset += offset;
838
839 switch (type) {
840 case LIST_hang:
841 /*
842 * Same stipulation as above, regarding `-hang'. We
843 * don't want to recalculate rmargin and offsets when
844 * using `Bd' or `Bl' within `-hang' overstep lists.
845 */
846 if (n->type == ROFFT_HEAD &&
847 NULL != n->next &&
848 NULL != n->next->child &&
849 (MDOC_Bl == n->next->child->tok ||
850 MDOC_Bd == n->next->child->tok))
851 break;
852 /* FALLTHROUGH */
853 case LIST_bullet:
854 case LIST_dash:
855 case LIST_enum:
856 case LIST_hyphen:
857 case LIST_tag:
858 if (n->type == ROFFT_HEAD)
859 p->rmargin = p->offset + width;
860 else
861 p->offset += width;
862 break;
863 case LIST_column:
864 assert(width);
865 p->rmargin = p->offset + width;
866 /*
867 * XXX - this behaviour is not documented: the
868 * right-most column is filled to the right margin.
869 */
870 if (n->type == ROFFT_HEAD)
871 break;
872 if (NULL == n->next && p->rmargin < p->maxrmargin)
873 p->rmargin = p->maxrmargin;
874 break;
875 default:
876 break;
877 }
878
879 /*
880 * The dash, hyphen, bullet and enum lists all have a special
881 * HEAD character (temporarily bold, in some cases).
882 */
883
884 if (n->type == ROFFT_HEAD)
885 switch (type) {
886 case LIST_bullet:
887 term_fontpush(p, TERMFONT_BOLD);
888 term_word(p, "\\[bu]");
889 term_fontpop(p);
890 break;
891 case LIST_dash:
892 case LIST_hyphen:
893 term_fontpush(p, TERMFONT_BOLD);
894 term_word(p, "-");
895 term_fontpop(p);
896 break;
897 case LIST_enum:
898 (pair->ppair->ppair->count)++;
899 (void)snprintf(buf, sizeof(buf), "%d.",
900 pair->ppair->ppair->count);
901 term_word(p, buf);
902 break;
903 default:
904 break;
905 }
906
907 /*
908 * If we're not going to process our children, indicate so here.
909 */
910
911 switch (type) {
912 case LIST_bullet:
913 case LIST_item:
914 case LIST_dash:
915 case LIST_hyphen:
916 case LIST_enum:
917 if (n->type == ROFFT_HEAD)
918 return 0;
919 break;
920 case LIST_column:
921 if (n->type == ROFFT_HEAD)
922 return 0;
923 break;
924 default:
925 break;
926 }
927
928 return 1;
929 }
930
931 static void
932 termp_it_post(DECL_ARGS)
933 {
934 enum mdoc_list type;
935
936 if (n->type == ROFFT_BLOCK)
937 return;
938
939 type = n->parent->parent->parent->norm->Bl.type;
940
941 switch (type) {
942 case LIST_item:
943 case LIST_diag:
944 case LIST_inset:
945 if (n->type == ROFFT_BODY)
946 term_newln(p);
947 break;
948 case LIST_column:
949 if (n->type == ROFFT_BODY)
950 term_flushln(p);
951 break;
952 default:
953 term_newln(p);
954 break;
955 }
956
957 /*
958 * Now that our output is flushed, we can reset our tags. Since
959 * only `It' sets these flags, we're free to assume that nobody
960 * has munged them in the meanwhile.
961 */
962
963 p->flags &= ~(TERMP_NOBREAK | TERMP_BRTRSP | TERMP_BRIND |
964 TERMP_DANGLE | TERMP_HANG);
965 p->trailspace = 0;
966 }
967
968 static int
969 termp_nm_pre(DECL_ARGS)
970 {
971 const char *cp;
972
973 if (n->type == ROFFT_BLOCK) {
974 p->flags |= TERMP_PREKEEP;
975 return 1;
976 }
977
978 if (n->type == ROFFT_BODY) {
979 if (NULL == n->child)
980 return 0;
981 p->flags |= TERMP_NOSPACE;
982 cp = NULL;
983 if (n->prev->child != NULL)
984 cp = n->prev->child->string;
985 if (cp == NULL)
986 cp = meta->name;
987 if (cp == NULL)
988 p->offset += term_len(p, 6);
989 else
990 p->offset += term_len(p, 1) + term_strlen(p, cp);
991 return 1;
992 }
993
994 if (n->child == NULL)
995 return 0;
996
997 if (n->type == ROFFT_HEAD)
998 synopsis_pre(p, n->parent);
999
1000 if (n->type == ROFFT_HEAD &&
1001 NULL != n->next && NULL != n->next->child) {
1002 p->flags |= TERMP_NOSPACE | TERMP_NOBREAK | TERMP_BRIND;
1003 p->trailspace = 1;
1004 p->rmargin = p->offset + term_len(p, 1);
1005 if (NULL == n->child) {
1006 p->rmargin += term_strlen(p, meta->name);
1007 } else if (n->child->type == ROFFT_TEXT) {
1008 p->rmargin += term_strlen(p, n->child->string);
1009 if (n->child->next)
1010 p->flags |= TERMP_HANG;
1011 } else {
1012 p->rmargin += term_len(p, 5);
1013 p->flags |= TERMP_HANG;
1014 }
1015 }
1016
1017 term_fontpush(p, TERMFONT_BOLD);
1018 return 1;
1019 }
1020
1021 static void
1022 termp_nm_post(DECL_ARGS)
1023 {
1024
1025 if (n->type == ROFFT_BLOCK) {
1026 p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
1027 } else if (n->type == ROFFT_HEAD &&
1028 NULL != n->next && NULL != n->next->child) {
1029 term_flushln(p);
1030 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND | TERMP_HANG);
1031 p->trailspace = 0;
1032 } else if (n->type == ROFFT_BODY && n->child != NULL)
1033 term_flushln(p);
1034 }
1035
1036 static int
1037 termp_fl_pre(DECL_ARGS)
1038 {
1039
1040 termp_tag_pre(p, pair, meta, n);
1041 term_fontpush(p, TERMFONT_BOLD);
1042 term_word(p, "\\-");
1043
1044 if (!(n->child == NULL &&
1045 (n->next == NULL ||
1046 n->next->type == ROFFT_TEXT ||
1047 n->next->flags & NODE_LINE)))
1048 p->flags |= TERMP_NOSPACE;
1049
1050 return 1;
1051 }
1052
1053 static int
1054 termp__a_pre(DECL_ARGS)
1055 {
1056
1057 if (n->prev && MDOC__A == n->prev->tok)
1058 if (NULL == n->next || MDOC__A != n->next->tok)
1059 term_word(p, "and");
1060
1061 return 1;
1062 }
1063
1064 static int
1065 termp_an_pre(DECL_ARGS)
1066 {
1067
1068 if (n->norm->An.auth == AUTH_split) {
1069 p->flags &= ~TERMP_NOSPLIT;
1070 p->flags |= TERMP_SPLIT;
1071 return 0;
1072 }
1073 if (n->norm->An.auth == AUTH_nosplit) {
1074 p->flags &= ~TERMP_SPLIT;
1075 p->flags |= TERMP_NOSPLIT;
1076 return 0;
1077 }
1078
1079 if (p->flags & TERMP_SPLIT)
1080 term_newln(p);
1081
1082 if (n->sec == SEC_AUTHORS && ! (p->flags & TERMP_NOSPLIT))
1083 p->flags |= TERMP_SPLIT;
1084
1085 return 1;
1086 }
1087
1088 static int
1089 termp_ns_pre(DECL_ARGS)
1090 {
1091
1092 if ( ! (NODE_LINE & n->flags))
1093 p->flags |= TERMP_NOSPACE;
1094 return 1;
1095 }
1096
1097 static int
1098 termp_rs_pre(DECL_ARGS)
1099 {
1100
1101 if (SEC_SEE_ALSO != n->sec)
1102 return 1;
1103 if (n->type == ROFFT_BLOCK && n->prev != NULL)
1104 term_vspace(p);
1105 return 1;
1106 }
1107
1108 static int
1109 termp_ex_pre(DECL_ARGS)
1110 {
1111 term_newln(p);
1112 return 1;
1113 }
1114
1115 static int
1116 termp_nd_pre(DECL_ARGS)
1117 {
1118
1119 if (n->type == ROFFT_BODY)
1120 term_word(p, "\\(en");
1121 return 1;
1122 }
1123
1124 static int
1125 termp_bl_pre(DECL_ARGS)
1126 {
1127
1128 return n->type != ROFFT_HEAD;
1129 }
1130
1131 static void
1132 termp_bl_post(DECL_ARGS)
1133 {
1134
1135 if (n->type != ROFFT_BLOCK)
1136 return;
1137 term_newln(p);
1138 if (n->tok != MDOC_Bl || n->norm->Bl.type != LIST_column)
1139 return;
1140 term_tab_set(p, NULL);
1141 term_tab_set(p, "T");
1142 term_tab_set(p, ".5i");
1143 }
1144
1145 static int
1146 termp_xr_pre(DECL_ARGS)
1147 {
1148
1149 if (NULL == (n = n->child))
1150 return 0;
1151
1152 assert(n->type == ROFFT_TEXT);
1153 term_word(p, n->string);
1154
1155 if (NULL == (n = n->next))
1156 return 0;
1157
1158 p->flags |= TERMP_NOSPACE;
1159 term_word(p, "(");
1160 p->flags |= TERMP_NOSPACE;
1161
1162 assert(n->type == ROFFT_TEXT);
1163 term_word(p, n->string);
1164
1165 p->flags |= TERMP_NOSPACE;
1166 term_word(p, ")");
1167
1168 return 0;
1169 }
1170
1171 /*
1172 * This decides how to assert whitespace before any of the SYNOPSIS set
1173 * of macros (which, as in the case of Ft/Fo and Ft/Fn, may contain
1174 * macro combos).
1175 */
1176 static void
1177 synopsis_pre(struct termp *p, const struct roff_node *n)
1178 {
1179 /*
1180 * Obviously, if we're not in a SYNOPSIS or no prior macros
1181 * exist, do nothing.
1182 */
1183 if (NULL == n->prev || ! (NODE_SYNPRETTY & n->flags))
1184 return;
1185
1186 /*
1187 * If we're the second in a pair of like elements, emit our
1188 * newline and return. UNLESS we're `Fo', `Fn', `Fn', in which
1189 * case we soldier on.
1190 */
1191 if (n->prev->tok == n->tok &&
1192 MDOC_Ft != n->tok &&
1193 MDOC_Fo != n->tok &&
1194 MDOC_Fn != n->tok) {
1195 term_newln(p);
1196 return;
1197 }
1198
1199 /*
1200 * If we're one of the SYNOPSIS set and non-like pair-wise after
1201 * another (or Fn/Fo, which we've let slip through) then assert
1202 * vertical space, else only newline and move on.
1203 */
1204 switch (n->prev->tok) {
1205 case MDOC_Fd:
1206 case MDOC_Fn:
1207 case MDOC_Fo:
1208 case MDOC_In:
1209 case MDOC_Vt:
1210 term_vspace(p);
1211 break;
1212 case MDOC_Ft:
1213 if (MDOC_Fn != n->tok && MDOC_Fo != n->tok) {
1214 term_vspace(p);
1215 break;
1216 }
1217 /* FALLTHROUGH */
1218 default:
1219 term_newln(p);
1220 break;
1221 }
1222 }
1223
1224 static int
1225 termp_vt_pre(DECL_ARGS)
1226 {
1227
1228 if (n->type == ROFFT_ELEM) {
1229 synopsis_pre(p, n);
1230 return termp_under_pre(p, pair, meta, n);
1231 } else if (n->type == ROFFT_BLOCK) {
1232 synopsis_pre(p, n);
1233 return 1;
1234 } else if (n->type == ROFFT_HEAD)
1235 return 0;
1236
1237 return termp_under_pre(p, pair, meta, n);
1238 }
1239
1240 static int
1241 termp_bold_pre(DECL_ARGS)
1242 {
1243
1244 termp_tag_pre(p, pair, meta, n);
1245 term_fontpush(p, TERMFONT_BOLD);
1246 return 1;
1247 }
1248
1249 static int
1250 termp_fd_pre(DECL_ARGS)
1251 {
1252
1253 synopsis_pre(p, n);
1254 return termp_bold_pre(p, pair, meta, n);
1255 }
1256
1257 static void
1258 termp_fd_post(DECL_ARGS)
1259 {
1260
1261 term_newln(p);
1262 }
1263
1264 static int
1265 termp_sh_pre(DECL_ARGS)
1266 {
1267
1268 switch (n->type) {
1269 case ROFFT_BLOCK:
1270 /*
1271 * Vertical space before sections, except
1272 * when the previous section was empty.
1273 */
1274 if (n->prev == NULL ||
1275 n->prev->tok != MDOC_Sh ||
1276 (n->prev->body != NULL &&
1277 n->prev->body->child != NULL))
1278 term_vspace(p);
1279 break;
1280 case ROFFT_HEAD:
1281 term_fontpush(p, TERMFONT_BOLD);
1282 break;
1283 case ROFFT_BODY:
1284 p->offset = term_len(p, p->defindent);
1285 term_tab_set(p, NULL);
1286 term_tab_set(p, "T");
1287 term_tab_set(p, ".5i");
1288 switch (n->sec) {
1289 case SEC_DESCRIPTION:
1290 fn_prio = 0;
1291 break;
1292 case SEC_AUTHORS:
1293 p->flags &= ~(TERMP_SPLIT|TERMP_NOSPLIT);
1294 break;
1295 default:
1296 break;
1297 }
1298 break;
1299 default:
1300 break;
1301 }
1302 return 1;
1303 }
1304
1305 static void
1306 termp_sh_post(DECL_ARGS)
1307 {
1308
1309 switch (n->type) {
1310 case ROFFT_HEAD:
1311 term_newln(p);
1312 break;
1313 case ROFFT_BODY:
1314 term_newln(p);
1315 p->offset = 0;
1316 break;
1317 default:
1318 break;
1319 }
1320 }
1321
1322 static void
1323 termp_lb_post(DECL_ARGS)
1324 {
1325
1326 if (SEC_LIBRARY == n->sec && NODE_LINE & n->flags)
1327 term_newln(p);
1328 }
1329
1330 static int
1331 termp_d1_pre(DECL_ARGS)
1332 {
1333
1334 if (n->type != ROFFT_BLOCK)
1335 return 1;
1336 term_newln(p);
1337 p->offset += term_len(p, p->defindent + 1);
1338 term_tab_set(p, NULL);
1339 term_tab_set(p, "T");
1340 term_tab_set(p, ".5i");
1341 return 1;
1342 }
1343
1344 static int
1345 termp_ft_pre(DECL_ARGS)
1346 {
1347
1348 /* NB: NODE_LINE does not effect this! */
1349 synopsis_pre(p, n);
1350 term_fontpush(p, TERMFONT_UNDER);
1351 return 1;
1352 }
1353
1354 static int
1355 termp_fn_pre(DECL_ARGS)
1356 {
1357 size_t rmargin = 0;
1358 int pretty;
1359
1360 pretty = NODE_SYNPRETTY & n->flags;
1361
1362 synopsis_pre(p, n);
1363
1364 if (NULL == (n = n->child))
1365 return 0;
1366
1367 if (pretty) {
1368 rmargin = p->rmargin;
1369 p->rmargin = p->offset + term_len(p, 4);
1370 p->flags |= TERMP_NOBREAK | TERMP_BRIND | TERMP_HANG;
1371 }
1372
1373 assert(n->type == ROFFT_TEXT);
1374 term_fontpush(p, TERMFONT_BOLD);
1375 term_word(p, n->string);
1376 term_fontpop(p);
1377
1378 if (n->sec == SEC_DESCRIPTION || n->sec == SEC_CUSTOM)
1379 tag_put(n->string, ++fn_prio, p->line);
1380
1381 if (pretty) {
1382 term_flushln(p);
1383 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND | TERMP_HANG);
1384 p->offset = p->rmargin;
1385 p->rmargin = rmargin;
1386 }
1387
1388 p->flags |= TERMP_NOSPACE;
1389 term_word(p, "(");
1390 p->flags |= TERMP_NOSPACE;
1391
1392 for (n = n->next; n; n = n->next) {
1393 assert(n->type == ROFFT_TEXT);
1394 term_fontpush(p, TERMFONT_UNDER);
1395 if (pretty)
1396 p->flags |= TERMP_NBRWORD;
1397 term_word(p, n->string);
1398 term_fontpop(p);
1399
1400 if (n->next) {
1401 p->flags |= TERMP_NOSPACE;
1402 term_word(p, ",");
1403 }
1404 }
1405
1406 p->flags |= TERMP_NOSPACE;
1407 term_word(p, ")");
1408
1409 if (pretty) {
1410 p->flags |= TERMP_NOSPACE;
1411 term_word(p, ";");
1412 term_flushln(p);
1413 }
1414
1415 return 0;
1416 }
1417
1418 static int
1419 termp_fa_pre(DECL_ARGS)
1420 {
1421 const struct roff_node *nn;
1422
1423 if (n->parent->tok != MDOC_Fo) {
1424 term_fontpush(p, TERMFONT_UNDER);
1425 return 1;
1426 }
1427
1428 for (nn = n->child; nn; nn = nn->next) {
1429 term_fontpush(p, TERMFONT_UNDER);
1430 p->flags |= TERMP_NBRWORD;
1431 term_word(p, nn->string);
1432 term_fontpop(p);
1433
1434 if (nn->next || (n->next && n->next->tok == MDOC_Fa)) {
1435 p->flags |= TERMP_NOSPACE;
1436 term_word(p, ",");
1437 }
1438 }
1439
1440 return 0;
1441 }
1442
1443 static int
1444 termp_bd_pre(DECL_ARGS)
1445 {
1446 size_t lm, len, rm, rmax;
1447 struct roff_node *nn;
1448 int offset;
1449
1450 if (n->type == ROFFT_BLOCK) {
1451 print_bvspace(p, n, n);
1452 return 1;
1453 } else if (n->type == ROFFT_HEAD)
1454 return 0;
1455
1456 /* Handle the -offset argument. */
1457
1458 if (n->norm->Bd.offs == NULL ||
1459 ! strcmp(n->norm->Bd.offs, "left"))
1460 /* nothing */;
1461 else if ( ! strcmp(n->norm->Bd.offs, "indent"))
1462 p->offset += term_len(p, p->defindent + 1);
1463 else if ( ! strcmp(n->norm->Bd.offs, "indent-two"))
1464 p->offset += term_len(p, (p->defindent + 1) * 2);
1465 else {
1466 offset = a2width(p, n->norm->Bd.offs);
1467 if (offset < 0 && (size_t)(-offset) > p->offset)
1468 p->offset = 0;
1469 else if (offset < SHRT_MAX)
1470 p->offset += offset;
1471 }
1472
1473 /*
1474 * If -ragged or -filled are specified, the block does nothing
1475 * but change the indentation. If -unfilled or -literal are
1476 * specified, text is printed exactly as entered in the display:
1477 * for macro lines, a newline is appended to the line. Blank
1478 * lines are allowed.
1479 */
1480
1481 if (DISP_literal != n->norm->Bd.type &&
1482 DISP_unfilled != n->norm->Bd.type &&
1483 DISP_centered != n->norm->Bd.type)
1484 return 1;
1485
1486 if (n->norm->Bd.type == DISP_literal) {
1487 term_tab_set(p, NULL);
1488 term_tab_set(p, "T");
1489 term_tab_set(p, "8n");
1490 }
1491
1492 lm = p->offset;
1493 rm = p->rmargin;
1494 rmax = p->maxrmargin;
1495 p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
1496
1497 for (nn = n->child; nn; nn = nn->next) {
1498 if (DISP_centered == n->norm->Bd.type) {
1499 if (nn->type == ROFFT_TEXT) {
1500 len = term_strlen(p, nn->string);
1501 p->offset = len >= rm ? 0 :
1502 lm + len >= rm ? rm - len :
1503 (lm + rm - len) / 2;
1504 } else
1505 p->offset = lm;
1506 }
1507 print_mdoc_node(p, pair, meta, nn);
1508 /*
1509 * If the printed node flushes its own line, then we
1510 * needn't do it here as well. This is hacky, but the
1511 * notion of selective eoln whitespace is pretty dumb
1512 * anyway, so don't sweat it.
1513 */
1514 if (nn->tok < ROFF_MAX)
1515 continue;
1516 switch (nn->tok) {
1517 case MDOC_Sm:
1518 case MDOC_Bl:
1519 case MDOC_D1:
1520 case MDOC_Dl:
1521 case MDOC_Lp:
1522 case MDOC_Pp:
1523 continue;
1524 default:
1525 break;
1526 }
1527 if (p->flags & TERMP_NONEWLINE ||
1528 (nn->next && ! (nn->next->flags & NODE_LINE)))
1529 continue;
1530 term_flushln(p);
1531 p->flags |= TERMP_NOSPACE;
1532 }
1533
1534 p->rmargin = rm;
1535 p->maxrmargin = rmax;
1536 return 0;
1537 }
1538
1539 static void
1540 termp_bd_post(DECL_ARGS)
1541 {
1542 size_t rm, rmax;
1543
1544 if (n->type != ROFFT_BODY)
1545 return;
1546
1547 rm = p->rmargin;
1548 rmax = p->maxrmargin;
1549
1550 if (DISP_literal == n->norm->Bd.type ||
1551 DISP_unfilled == n->norm->Bd.type)
1552 p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
1553
1554 p->flags |= TERMP_NOSPACE;
1555 term_newln(p);
1556
1557 p->rmargin = rm;
1558 p->maxrmargin = rmax;
1559 }
1560
1561 static int
1562 termp_xx_pre(DECL_ARGS)
1563 {
1564 if ((n->aux = p->flags & TERMP_PREKEEP) == 0)
1565 p->flags |= TERMP_PREKEEP;
1566 return 1;
1567 }
1568
1569 static void
1570 termp_xx_post(DECL_ARGS)
1571 {
1572 if (n->aux == 0)
1573 p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
1574 }
1575
1576 static void
1577 termp_pf_post(DECL_ARGS)
1578 {
1579
1580 if ( ! (n->next == NULL || n->next->flags & NODE_LINE))
1581 p->flags |= TERMP_NOSPACE;
1582 }
1583
1584 static int
1585 termp_ss_pre(DECL_ARGS)
1586 {
1587 struct roff_node *nn;
1588
1589 switch (n->type) {
1590 case ROFFT_BLOCK:
1591 term_newln(p);
1592 for (nn = n->prev; nn != NULL; nn = nn->prev)
1593 if ((nn->flags & NODE_NOPRT) == 0)
1594 break;
1595 if (nn != NULL)
1596 term_vspace(p);
1597 break;
1598 case ROFFT_HEAD:
1599 term_fontpush(p, TERMFONT_BOLD);
1600 p->offset = term_len(p, (p->defindent+1)/2);
1601 break;
1602 case ROFFT_BODY:
1603 p->offset = term_len(p, p->defindent);
1604 term_tab_set(p, NULL);
1605 term_tab_set(p, "T");
1606 term_tab_set(p, ".5i");
1607 break;
1608 default:
1609 break;
1610 }
1611
1612 return 1;
1613 }
1614
1615 static void
1616 termp_ss_post(DECL_ARGS)
1617 {
1618
1619 if (n->type == ROFFT_HEAD || n->type == ROFFT_BODY)
1620 term_newln(p);
1621 }
1622
1623 static int
1624 termp_cd_pre(DECL_ARGS)
1625 {
1626
1627 synopsis_pre(p, n);
1628 term_fontpush(p, TERMFONT_BOLD);
1629 return 1;
1630 }
1631
1632 static int
1633 termp_in_pre(DECL_ARGS)
1634 {
1635
1636 synopsis_pre(p, n);
1637
1638 if (NODE_SYNPRETTY & n->flags && NODE_LINE & n->flags) {
1639 term_fontpush(p, TERMFONT_BOLD);
1640 term_word(p, "#include");
1641 term_word(p, "<");
1642 } else {
1643 term_word(p, "<");
1644 term_fontpush(p, TERMFONT_UNDER);
1645 }
1646
1647 p->flags |= TERMP_NOSPACE;
1648 return 1;
1649 }
1650
1651 static void
1652 termp_in_post(DECL_ARGS)
1653 {
1654
1655 if (NODE_SYNPRETTY & n->flags)
1656 term_fontpush(p, TERMFONT_BOLD);
1657
1658 p->flags |= TERMP_NOSPACE;
1659 term_word(p, ">");
1660
1661 if (NODE_SYNPRETTY & n->flags)
1662 term_fontpop(p);
1663 }
1664
1665 static int
1666 termp_pp_pre(DECL_ARGS)
1667 {
1668 fn_prio = 0;
1669 term_vspace(p);
1670 return 0;
1671 }
1672
1673 static int
1674 termp_skip_pre(DECL_ARGS)
1675 {
1676
1677 return 0;
1678 }
1679
1680 static int
1681 termp_quote_pre(DECL_ARGS)
1682 {
1683
1684 if (n->type != ROFFT_BODY && n->type != ROFFT_ELEM)
1685 return 1;
1686
1687 switch (n->tok) {
1688 case MDOC_Ao:
1689 case MDOC_Aq:
1690 term_word(p, n->child != NULL && n->child->next == NULL &&
1691 n->child->tok == MDOC_Mt ? "<" : "\\(la");
1692 break;
1693 case MDOC_Bro:
1694 case MDOC_Brq:
1695 term_word(p, "{");
1696 break;
1697 case MDOC_Oo:
1698 case MDOC_Op:
1699 case MDOC_Bo:
1700 case MDOC_Bq:
1701 term_word(p, "[");
1702 break;
1703 case MDOC__T:
1704 /* FALLTHROUGH */
1705 case MDOC_Do:
1706 case MDOC_Dq:
1707 term_word(p, "\\(Lq");
1708 break;
1709 case MDOC_En:
1710 if (NULL == n->norm->Es ||
1711 NULL == n->norm->Es->child)
1712 return 1;
1713 term_word(p, n->norm->Es->child->string);
1714 break;
1715 case MDOC_Po:
1716 case MDOC_Pq:
1717 term_word(p, "(");
1718 break;
1719 case MDOC_Qo:
1720 case MDOC_Qq:
1721 term_word(p, "\"");
1722 break;
1723 case MDOC_Ql:
1724 case MDOC_So:
1725 case MDOC_Sq:
1726 term_word(p, "\\(oq");
1727 break;
1728 default:
1729 abort();
1730 }
1731
1732 p->flags |= TERMP_NOSPACE;
1733 return 1;
1734 }
1735
1736 static void
1737 termp_quote_post(DECL_ARGS)
1738 {
1739
1740 if (n->type != ROFFT_BODY && n->type != ROFFT_ELEM)
1741 return;
1742
1743 p->flags |= TERMP_NOSPACE;
1744
1745 switch (n->tok) {
1746 case MDOC_Ao:
1747 case MDOC_Aq:
1748 term_word(p, n->child != NULL && n->child->next == NULL &&
1749 n->child->tok == MDOC_Mt ? ">" : "\\(ra");
1750 break;
1751 case MDOC_Bro:
1752 case MDOC_Brq:
1753 term_word(p, "}");
1754 break;
1755 case MDOC_Oo:
1756 case MDOC_Op:
1757 case MDOC_Bo:
1758 case MDOC_Bq:
1759 term_word(p, "]");
1760 break;
1761 case MDOC__T:
1762 /* FALLTHROUGH */
1763 case MDOC_Do:
1764 case MDOC_Dq:
1765 term_word(p, "\\(Rq");
1766 break;
1767 case MDOC_En:
1768 if (n->norm->Es == NULL ||
1769 n->norm->Es->child == NULL ||
1770 n->norm->Es->child->next == NULL)
1771 p->flags &= ~TERMP_NOSPACE;
1772 else
1773 term_word(p, n->norm->Es->child->next->string);
1774 break;
1775 case MDOC_Po:
1776 case MDOC_Pq:
1777 term_word(p, ")");
1778 break;
1779 case MDOC_Qo:
1780 case MDOC_Qq:
1781 term_word(p, "\"");
1782 break;
1783 case MDOC_Ql:
1784 case MDOC_So:
1785 case MDOC_Sq:
1786 term_word(p, "\\(cq");
1787 break;
1788 default:
1789 abort();
1790 }
1791 }
1792
1793 static int
1794 termp_eo_pre(DECL_ARGS)
1795 {
1796
1797 if (n->type != ROFFT_BODY)
1798 return 1;
1799
1800 if (n->end == ENDBODY_NOT &&
1801 n->parent->head->child == NULL &&
1802 n->child != NULL &&
1803 n->child->end != ENDBODY_NOT)
1804 term_word(p, "\\&");
1805 else if (n->end != ENDBODY_NOT ? n->child != NULL :
1806 n->parent->head->child != NULL && (n->child != NULL ||
1807 (n->parent->tail != NULL && n->parent->tail->child != NULL)))
1808 p->flags |= TERMP_NOSPACE;
1809
1810 return 1;
1811 }
1812
1813 static void
1814 termp_eo_post(DECL_ARGS)
1815 {
1816 int body, tail;
1817
1818 if (n->type != ROFFT_BODY)
1819 return;
1820
1821 if (n->end != ENDBODY_NOT) {
1822 p->flags &= ~TERMP_NOSPACE;
1823 return;
1824 }
1825
1826 body = n->child != NULL || n->parent->head->child != NULL;
1827 tail = n->parent->tail != NULL && n->parent->tail->child != NULL;
1828
1829 if (body && tail)
1830 p->flags |= TERMP_NOSPACE;
1831 else if ( ! (body || tail))
1832 term_word(p, "\\&");
1833 else if ( ! tail)
1834 p->flags &= ~TERMP_NOSPACE;
1835 }
1836
1837 static int
1838 termp_fo_pre(DECL_ARGS)
1839 {
1840 size_t rmargin = 0;
1841 int pretty;
1842
1843 pretty = NODE_SYNPRETTY & n->flags;
1844
1845 if (n->type == ROFFT_BLOCK) {
1846 synopsis_pre(p, n);
1847 return 1;
1848 } else if (n->type == ROFFT_BODY) {
1849 if (pretty) {
1850 rmargin = p->rmargin;
1851 p->rmargin = p->offset + term_len(p, 4);
1852 p->flags |= TERMP_NOBREAK | TERMP_BRIND |
1853 TERMP_HANG;
1854 }
1855 p->flags |= TERMP_NOSPACE;
1856 term_word(p, "(");
1857 p->flags |= TERMP_NOSPACE;
1858 if (pretty) {
1859 term_flushln(p);
1860 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND |
1861 TERMP_HANG);
1862 p->offset = p->rmargin;
1863 p->rmargin = rmargin;
1864 }
1865 return 1;
1866 }
1867
1868 if (NULL == n->child)
1869 return 0;
1870
1871 /* XXX: we drop non-initial arguments as per groff. */
1872
1873 assert(n->child->string);
1874 term_fontpush(p, TERMFONT_BOLD);
1875 term_word(p, n->child->string);
1876 return 0;
1877 }
1878
1879 static void
1880 termp_fo_post(DECL_ARGS)
1881 {
1882
1883 if (n->type != ROFFT_BODY)
1884 return;
1885
1886 p->flags |= TERMP_NOSPACE;
1887 term_word(p, ")");
1888
1889 if (NODE_SYNPRETTY & n->flags) {
1890 p->flags |= TERMP_NOSPACE;
1891 term_word(p, ";");
1892 term_flushln(p);
1893 }
1894 }
1895
1896 static int
1897 termp_bf_pre(DECL_ARGS)
1898 {
1899
1900 if (n->type == ROFFT_HEAD)
1901 return 0;
1902 else if (n->type != ROFFT_BODY)
1903 return 1;
1904
1905 if (FONT_Em == n->norm->Bf.font)
1906 term_fontpush(p, TERMFONT_UNDER);
1907 else if (FONT_Sy == n->norm->Bf.font)
1908 term_fontpush(p, TERMFONT_BOLD);
1909 else
1910 term_fontpush(p, TERMFONT_NONE);
1911
1912 return 1;
1913 }
1914
1915 static int
1916 termp_sm_pre(DECL_ARGS)
1917 {
1918
1919 if (NULL == n->child)
1920 p->flags ^= TERMP_NONOSPACE;
1921 else if (0 == strcmp("on", n->child->string))
1922 p->flags &= ~TERMP_NONOSPACE;
1923 else
1924 p->flags |= TERMP_NONOSPACE;
1925
1926 if (p->col && ! (TERMP_NONOSPACE & p->flags))
1927 p->flags &= ~TERMP_NOSPACE;
1928
1929 return 0;
1930 }
1931
1932 static int
1933 termp_ap_pre(DECL_ARGS)
1934 {
1935
1936 p->flags |= TERMP_NOSPACE;
1937 term_word(p, "'");
1938 p->flags |= TERMP_NOSPACE;
1939 return 1;
1940 }
1941
1942 static void
1943 termp____post(DECL_ARGS)
1944 {
1945
1946 /*
1947 * Handle lists of authors. In general, print each followed by
1948 * a comma. Don't print the comma if there are only two
1949 * authors.
1950 */
1951 if (MDOC__A == n->tok && n->next && MDOC__A == n->next->tok)
1952 if (NULL == n->next->next || MDOC__A != n->next->next->tok)
1953 if (NULL == n->prev || MDOC__A != n->prev->tok)
1954 return;
1955
1956 /* TODO: %U. */
1957
1958 if (NULL == n->parent || MDOC_Rs != n->parent->tok)
1959 return;
1960
1961 p->flags |= TERMP_NOSPACE;
1962 if (NULL == n->next) {
1963 term_word(p, ".");
1964 p->flags |= TERMP_SENTENCE;
1965 } else
1966 term_word(p, ",");
1967 }
1968
1969 static int
1970 termp_li_pre(DECL_ARGS)
1971 {
1972
1973 termp_tag_pre(p, pair, meta, n);
1974 term_fontpush(p, TERMFONT_NONE);
1975 return 1;
1976 }
1977
1978 static int
1979 termp_lk_pre(DECL_ARGS)
1980 {
1981 const struct roff_node *link, *descr, *punct;
1982 int display;
1983
1984 if ((link = n->child) == NULL)
1985 return 0;
1986
1987 /* Find beginning of trailing punctuation. */
1988 punct = n->last;
1989 while (punct != link && punct->flags & NODE_DELIMC)
1990 punct = punct->prev;
1991 punct = punct->next;
1992
1993 /* Link text. */
1994 if ((descr = link->next) != NULL && descr != punct) {
1995 term_fontpush(p, TERMFONT_UNDER);
1996 while (descr != punct) {
1997 if (descr->flags & (NODE_DELIMC | NODE_DELIMO))
1998 p->flags |= TERMP_NOSPACE;
1999 term_word(p, descr->string);
2000 descr = descr->next;
2001 }
2002 term_fontpop(p);
2003 p->flags |= TERMP_NOSPACE;
2004 term_word(p, ":");
2005 }
2006
2007 /* Link target. */
2008 display = term_strlen(p, link->string) >= 26;
2009 if (display) {
2010 term_newln(p);
2011 p->offset += term_len(p, p->defindent + 1);
2012 }
2013 term_fontpush(p, TERMFONT_BOLD);
2014 term_word(p, link->string);
2015 term_fontpop(p);
2016
2017 /* Trailing punctuation. */
2018 while (punct != NULL) {
2019 p->flags |= TERMP_NOSPACE;
2020 term_word(p, punct->string);
2021 punct = punct->next;
2022 }
2023 if (display)
2024 term_newln(p);
2025 return 0;
2026 }
2027
2028 static int
2029 termp_bk_pre(DECL_ARGS)
2030 {
2031
2032 switch (n->type) {
2033 case ROFFT_BLOCK:
2034 break;
2035 case ROFFT_HEAD:
2036 return 0;
2037 case ROFFT_BODY:
2038 if (n->parent->args != NULL || n->prev->child == NULL)
2039 p->flags |= TERMP_PREKEEP;
2040 break;
2041 default:
2042 abort();
2043 }
2044
2045 return 1;
2046 }
2047
2048 static void
2049 termp_bk_post(DECL_ARGS)
2050 {
2051
2052 if (n->type == ROFFT_BODY)
2053 p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
2054 }
2055
2056 static void
2057 termp__t_post(DECL_ARGS)
2058 {
2059
2060 /*
2061 * If we're in an `Rs' and there's a journal present, then quote
2062 * us instead of underlining us (for disambiguation).
2063 */
2064 if (n->parent && MDOC_Rs == n->parent->tok &&
2065 n->parent->norm->Rs.quote_T)
2066 termp_quote_post(p, pair, meta, n);
2067
2068 termp____post(p, pair, meta, n);
2069 }
2070
2071 static int
2072 termp__t_pre(DECL_ARGS)
2073 {
2074
2075 /*
2076 * If we're in an `Rs' and there's a journal present, then quote
2077 * us instead of underlining us (for disambiguation).
2078 */
2079 if (n->parent && MDOC_Rs == n->parent->tok &&
2080 n->parent->norm->Rs.quote_T)
2081 return termp_quote_pre(p, pair, meta, n);
2082
2083 term_fontpush(p, TERMFONT_UNDER);
2084 return 1;
2085 }
2086
2087 static int
2088 termp_under_pre(DECL_ARGS)
2089 {
2090
2091 term_fontpush(p, TERMFONT_UNDER);
2092 return 1;
2093 }
2094
2095 static int
2096 termp_em_pre(DECL_ARGS)
2097 {
2098 if (n->child != NULL &&
2099 n->child->type == ROFFT_TEXT)
2100 tag_put(n->child->string, 0, p->line);
2101 term_fontpush(p, TERMFONT_UNDER);
2102 return 1;
2103 }
2104
2105 static int
2106 termp_sy_pre(DECL_ARGS)
2107 {
2108 if (n->child != NULL &&
2109 n->child->type == ROFFT_TEXT)
2110 tag_put(n->child->string, 0, p->line);
2111 term_fontpush(p, TERMFONT_BOLD);
2112 return 1;
2113 }
2114
2115 static int
2116 termp_er_pre(DECL_ARGS)
2117 {
2118
2119 if (n->sec == SEC_ERRORS &&
2120 (n->parent->tok == MDOC_It ||
2121 (n->parent->tok == MDOC_Bq &&
2122 n->parent->parent->parent->tok == MDOC_It)))
2123 tag_put(n->child->string, 1, p->line);
2124 return 1;
2125 }
2126
2127 static int
2128 termp_tag_pre(DECL_ARGS)
2129 {
2130
2131 if (n->child != NULL &&
2132 n->child->type == ROFFT_TEXT &&
2133 (n->prev == NULL ||
2134 (n->prev->type == ROFFT_TEXT &&
2135 strcmp(n->prev->string, "|") == 0)) &&
2136 (n->parent->tok == MDOC_It ||
2137 (n->parent->tok == MDOC_Xo &&
2138 n->parent->parent->prev == NULL &&
2139 n->parent->parent->parent->tok == MDOC_It)))
2140 tag_put(n->child->string, 1, p->line);
2141 return 1;
2142 }
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