xref: /illumos-gate/usr/src/cmd/mandoc/mdoc_html.c (revision 45ede40b2394db7967e59f19288fae9b62efd4aa)
1 /*	$Id: mdoc_html.c,v 1.328 2019/03/01 10:57:18 schwarze Exp $ */
2 /*
3  * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
4  * Copyright (c) 2014-2019 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 <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <unistd.h>
28 
29 #include "mandoc_aux.h"
30 #include "mandoc.h"
31 #include "roff.h"
32 #include "mdoc.h"
33 #include "out.h"
34 #include "html.h"
35 #include "main.h"
36 
37 #define	MDOC_ARGS	  const struct roff_meta *meta, \
38 			  struct roff_node *n, \
39 			  struct html *h
40 
41 #ifndef MIN
42 #define	MIN(a,b)	((/*CONSTCOND*/(a)<(b))?(a):(b))
43 #endif
44 
45 struct	mdoc_html_act {
46 	int		(*pre)(MDOC_ARGS);
47 	void		(*post)(MDOC_ARGS);
48 };
49 
50 static	char		 *cond_id(const struct roff_node *);
51 static	void		  print_mdoc_head(const struct roff_meta *,
52 				struct html *);
53 static	void		  print_mdoc_node(MDOC_ARGS);
54 static	void		  print_mdoc_nodelist(MDOC_ARGS);
55 static	void		  synopsis_pre(struct html *,
56 				const struct roff_node *);
57 
58 static	void		  mdoc_root_post(const struct roff_meta *,
59 				struct html *);
60 static	int		  mdoc_root_pre(const struct roff_meta *,
61 				struct html *);
62 
63 static	void		  mdoc__x_post(MDOC_ARGS);
64 static	int		  mdoc__x_pre(MDOC_ARGS);
65 static	int		  mdoc_abort_pre(MDOC_ARGS);
66 static	int		  mdoc_ad_pre(MDOC_ARGS);
67 static	int		  mdoc_an_pre(MDOC_ARGS);
68 static	int		  mdoc_ap_pre(MDOC_ARGS);
69 static	int		  mdoc_ar_pre(MDOC_ARGS);
70 static	int		  mdoc_bd_pre(MDOC_ARGS);
71 static	int		  mdoc_bf_pre(MDOC_ARGS);
72 static	void		  mdoc_bk_post(MDOC_ARGS);
73 static	int		  mdoc_bk_pre(MDOC_ARGS);
74 static	int		  mdoc_bl_pre(MDOC_ARGS);
75 static	int		  mdoc_cd_pre(MDOC_ARGS);
76 static	int		  mdoc_cm_pre(MDOC_ARGS);
77 static	int		  mdoc_d1_pre(MDOC_ARGS);
78 static	int		  mdoc_dv_pre(MDOC_ARGS);
79 static	int		  mdoc_fa_pre(MDOC_ARGS);
80 static	int		  mdoc_fd_pre(MDOC_ARGS);
81 static	int		  mdoc_fl_pre(MDOC_ARGS);
82 static	int		  mdoc_fn_pre(MDOC_ARGS);
83 static	int		  mdoc_ft_pre(MDOC_ARGS);
84 static	int		  mdoc_em_pre(MDOC_ARGS);
85 static	void		  mdoc_eo_post(MDOC_ARGS);
86 static	int		  mdoc_eo_pre(MDOC_ARGS);
87 static	int		  mdoc_er_pre(MDOC_ARGS);
88 static	int		  mdoc_ev_pre(MDOC_ARGS);
89 static	int		  mdoc_ex_pre(MDOC_ARGS);
90 static	void		  mdoc_fo_post(MDOC_ARGS);
91 static	int		  mdoc_fo_pre(MDOC_ARGS);
92 static	int		  mdoc_ic_pre(MDOC_ARGS);
93 static	int		  mdoc_igndelim_pre(MDOC_ARGS);
94 static	int		  mdoc_in_pre(MDOC_ARGS);
95 static	int		  mdoc_it_pre(MDOC_ARGS);
96 static	int		  mdoc_lb_pre(MDOC_ARGS);
97 static	int		  mdoc_li_pre(MDOC_ARGS);
98 static	int		  mdoc_lk_pre(MDOC_ARGS);
99 static	int		  mdoc_mt_pre(MDOC_ARGS);
100 static	int		  mdoc_ms_pre(MDOC_ARGS);
101 static	int		  mdoc_nd_pre(MDOC_ARGS);
102 static	int		  mdoc_nm_pre(MDOC_ARGS);
103 static	int		  mdoc_no_pre(MDOC_ARGS);
104 static	int		  mdoc_ns_pre(MDOC_ARGS);
105 static	int		  mdoc_pa_pre(MDOC_ARGS);
106 static	void		  mdoc_pf_post(MDOC_ARGS);
107 static	int		  mdoc_pp_pre(MDOC_ARGS);
108 static	void		  mdoc_quote_post(MDOC_ARGS);
109 static	int		  mdoc_quote_pre(MDOC_ARGS);
110 static	int		  mdoc_rs_pre(MDOC_ARGS);
111 static	int		  mdoc_sh_pre(MDOC_ARGS);
112 static	int		  mdoc_skip_pre(MDOC_ARGS);
113 static	int		  mdoc_sm_pre(MDOC_ARGS);
114 static	int		  mdoc_ss_pre(MDOC_ARGS);
115 static	int		  mdoc_st_pre(MDOC_ARGS);
116 static	int		  mdoc_sx_pre(MDOC_ARGS);
117 static	int		  mdoc_sy_pre(MDOC_ARGS);
118 static	int		  mdoc_va_pre(MDOC_ARGS);
119 static	int		  mdoc_vt_pre(MDOC_ARGS);
120 static	int		  mdoc_xr_pre(MDOC_ARGS);
121 static	int		  mdoc_xx_pre(MDOC_ARGS);
122 
123 static const struct mdoc_html_act mdoc_html_acts[MDOC_MAX - MDOC_Dd] = {
124 	{NULL, NULL}, /* Dd */
125 	{NULL, NULL}, /* Dt */
126 	{NULL, NULL}, /* Os */
127 	{mdoc_sh_pre, NULL }, /* Sh */
128 	{mdoc_ss_pre, NULL }, /* Ss */
129 	{mdoc_pp_pre, NULL}, /* Pp */
130 	{mdoc_d1_pre, NULL}, /* D1 */
131 	{mdoc_d1_pre, NULL}, /* Dl */
132 	{mdoc_bd_pre, NULL}, /* Bd */
133 	{NULL, NULL}, /* Ed */
134 	{mdoc_bl_pre, NULL}, /* Bl */
135 	{NULL, NULL}, /* El */
136 	{mdoc_it_pre, NULL}, /* It */
137 	{mdoc_ad_pre, NULL}, /* Ad */
138 	{mdoc_an_pre, NULL}, /* An */
139 	{mdoc_ap_pre, NULL}, /* Ap */
140 	{mdoc_ar_pre, NULL}, /* Ar */
141 	{mdoc_cd_pre, NULL}, /* Cd */
142 	{mdoc_cm_pre, NULL}, /* Cm */
143 	{mdoc_dv_pre, NULL}, /* Dv */
144 	{mdoc_er_pre, NULL}, /* Er */
145 	{mdoc_ev_pre, NULL}, /* Ev */
146 	{mdoc_ex_pre, NULL}, /* Ex */
147 	{mdoc_fa_pre, NULL}, /* Fa */
148 	{mdoc_fd_pre, NULL}, /* Fd */
149 	{mdoc_fl_pre, NULL}, /* Fl */
150 	{mdoc_fn_pre, NULL}, /* Fn */
151 	{mdoc_ft_pre, NULL}, /* Ft */
152 	{mdoc_ic_pre, NULL}, /* Ic */
153 	{mdoc_in_pre, NULL}, /* In */
154 	{mdoc_li_pre, NULL}, /* Li */
155 	{mdoc_nd_pre, NULL}, /* Nd */
156 	{mdoc_nm_pre, NULL}, /* Nm */
157 	{mdoc_quote_pre, mdoc_quote_post}, /* Op */
158 	{mdoc_abort_pre, NULL}, /* Ot */
159 	{mdoc_pa_pre, NULL}, /* Pa */
160 	{mdoc_ex_pre, NULL}, /* Rv */
161 	{mdoc_st_pre, NULL}, /* St */
162 	{mdoc_va_pre, NULL}, /* Va */
163 	{mdoc_vt_pre, NULL}, /* Vt */
164 	{mdoc_xr_pre, NULL}, /* Xr */
165 	{mdoc__x_pre, mdoc__x_post}, /* %A */
166 	{mdoc__x_pre, mdoc__x_post}, /* %B */
167 	{mdoc__x_pre, mdoc__x_post}, /* %D */
168 	{mdoc__x_pre, mdoc__x_post}, /* %I */
169 	{mdoc__x_pre, mdoc__x_post}, /* %J */
170 	{mdoc__x_pre, mdoc__x_post}, /* %N */
171 	{mdoc__x_pre, mdoc__x_post}, /* %O */
172 	{mdoc__x_pre, mdoc__x_post}, /* %P */
173 	{mdoc__x_pre, mdoc__x_post}, /* %R */
174 	{mdoc__x_pre, mdoc__x_post}, /* %T */
175 	{mdoc__x_pre, mdoc__x_post}, /* %V */
176 	{NULL, NULL}, /* Ac */
177 	{mdoc_quote_pre, mdoc_quote_post}, /* Ao */
178 	{mdoc_quote_pre, mdoc_quote_post}, /* Aq */
179 	{mdoc_xx_pre, NULL}, /* At */
180 	{NULL, NULL}, /* Bc */
181 	{mdoc_bf_pre, NULL}, /* Bf */
182 	{mdoc_quote_pre, mdoc_quote_post}, /* Bo */
183 	{mdoc_quote_pre, mdoc_quote_post}, /* Bq */
184 	{mdoc_xx_pre, NULL}, /* Bsx */
185 	{mdoc_xx_pre, NULL}, /* Bx */
186 	{mdoc_skip_pre, NULL}, /* Db */
187 	{NULL, NULL}, /* Dc */
188 	{mdoc_quote_pre, mdoc_quote_post}, /* Do */
189 	{mdoc_quote_pre, mdoc_quote_post}, /* Dq */
190 	{NULL, NULL}, /* Ec */ /* FIXME: no space */
191 	{NULL, NULL}, /* Ef */
192 	{mdoc_em_pre, NULL}, /* Em */
193 	{mdoc_eo_pre, mdoc_eo_post}, /* Eo */
194 	{mdoc_xx_pre, NULL}, /* Fx */
195 	{mdoc_ms_pre, NULL}, /* Ms */
196 	{mdoc_no_pre, NULL}, /* No */
197 	{mdoc_ns_pre, NULL}, /* Ns */
198 	{mdoc_xx_pre, NULL}, /* Nx */
199 	{mdoc_xx_pre, NULL}, /* Ox */
200 	{NULL, NULL}, /* Pc */
201 	{mdoc_igndelim_pre, mdoc_pf_post}, /* Pf */
202 	{mdoc_quote_pre, mdoc_quote_post}, /* Po */
203 	{mdoc_quote_pre, mdoc_quote_post}, /* Pq */
204 	{NULL, NULL}, /* Qc */
205 	{mdoc_quote_pre, mdoc_quote_post}, /* Ql */
206 	{mdoc_quote_pre, mdoc_quote_post}, /* Qo */
207 	{mdoc_quote_pre, mdoc_quote_post}, /* Qq */
208 	{NULL, NULL}, /* Re */
209 	{mdoc_rs_pre, NULL}, /* Rs */
210 	{NULL, NULL}, /* Sc */
211 	{mdoc_quote_pre, mdoc_quote_post}, /* So */
212 	{mdoc_quote_pre, mdoc_quote_post}, /* Sq */
213 	{mdoc_sm_pre, NULL}, /* Sm */
214 	{mdoc_sx_pre, NULL}, /* Sx */
215 	{mdoc_sy_pre, NULL}, /* Sy */
216 	{NULL, NULL}, /* Tn */
217 	{mdoc_xx_pre, NULL}, /* Ux */
218 	{NULL, NULL}, /* Xc */
219 	{NULL, NULL}, /* Xo */
220 	{mdoc_fo_pre, mdoc_fo_post}, /* Fo */
221 	{NULL, NULL}, /* Fc */
222 	{mdoc_quote_pre, mdoc_quote_post}, /* Oo */
223 	{NULL, NULL}, /* Oc */
224 	{mdoc_bk_pre, mdoc_bk_post}, /* Bk */
225 	{NULL, NULL}, /* Ek */
226 	{NULL, NULL}, /* Bt */
227 	{NULL, NULL}, /* Hf */
228 	{mdoc_em_pre, NULL}, /* Fr */
229 	{NULL, NULL}, /* Ud */
230 	{mdoc_lb_pre, NULL}, /* Lb */
231 	{mdoc_abort_pre, NULL}, /* Lp */
232 	{mdoc_lk_pre, NULL}, /* Lk */
233 	{mdoc_mt_pre, NULL}, /* Mt */
234 	{mdoc_quote_pre, mdoc_quote_post}, /* Brq */
235 	{mdoc_quote_pre, mdoc_quote_post}, /* Bro */
236 	{NULL, NULL}, /* Brc */
237 	{mdoc__x_pre, mdoc__x_post}, /* %C */
238 	{mdoc_skip_pre, NULL}, /* Es */
239 	{mdoc_quote_pre, mdoc_quote_post}, /* En */
240 	{mdoc_xx_pre, NULL}, /* Dx */
241 	{mdoc__x_pre, mdoc__x_post}, /* %Q */
242 	{mdoc__x_pre, mdoc__x_post}, /* %U */
243 	{NULL, NULL}, /* Ta */
244 };
245 
246 
247 /*
248  * See the same function in mdoc_term.c for documentation.
249  */
250 static void
251 synopsis_pre(struct html *h, const struct roff_node *n)
252 {
253 
254 	if (NULL == n->prev || ! (NODE_SYNPRETTY & n->flags))
255 		return;
256 
257 	if (n->prev->tok == n->tok &&
258 	    MDOC_Fo != n->tok &&
259 	    MDOC_Ft != n->tok &&
260 	    MDOC_Fn != n->tok) {
261 		print_otag(h, TAG_BR, "");
262 		return;
263 	}
264 
265 	switch (n->prev->tok) {
266 	case MDOC_Fd:
267 	case MDOC_Fn:
268 	case MDOC_Fo:
269 	case MDOC_In:
270 	case MDOC_Vt:
271 		break;
272 	case MDOC_Ft:
273 		if (n->tok != MDOC_Fn && n->tok != MDOC_Fo)
274 			break;
275 		/* FALLTHROUGH */
276 	default:
277 		print_otag(h, TAG_BR, "");
278 		return;
279 	}
280 	html_close_paragraph(h);
281 	print_otag(h, TAG_P, "c", "Pp");
282 }
283 
284 void
285 html_mdoc(void *arg, const struct roff_meta *mdoc)
286 {
287 	struct html		*h;
288 	struct roff_node	*n;
289 	struct tag		*t;
290 
291 	h = (struct html *)arg;
292 	n = mdoc->first->child;
293 
294 	if ((h->oflags & HTML_FRAGMENT) == 0) {
295 		print_gen_decls(h);
296 		print_otag(h, TAG_HTML, "");
297 		if (n != NULL && n->type == ROFFT_COMMENT)
298 			print_gen_comment(h, n);
299 		t = print_otag(h, TAG_HEAD, "");
300 		print_mdoc_head(mdoc, h);
301 		print_tagq(h, t);
302 		print_otag(h, TAG_BODY, "");
303 	}
304 
305 	mdoc_root_pre(mdoc, h);
306 	t = print_otag(h, TAG_DIV, "c", "manual-text");
307 	print_mdoc_nodelist(mdoc, n, h);
308 	print_tagq(h, t);
309 	mdoc_root_post(mdoc, h);
310 	print_tagq(h, NULL);
311 }
312 
313 static void
314 print_mdoc_head(const struct roff_meta *meta, struct html *h)
315 {
316 	char	*cp;
317 
318 	print_gen_head(h);
319 
320 	if (meta->arch != NULL && meta->msec != NULL)
321 		mandoc_asprintf(&cp, "%s(%s) (%s)", meta->title,
322 		    meta->msec, meta->arch);
323 	else if (meta->msec != NULL)
324 		mandoc_asprintf(&cp, "%s(%s)", meta->title, meta->msec);
325 	else if (meta->arch != NULL)
326 		mandoc_asprintf(&cp, "%s (%s)", meta->title, meta->arch);
327 	else
328 		cp = mandoc_strdup(meta->title);
329 
330 	print_otag(h, TAG_TITLE, "");
331 	print_text(h, cp);
332 	free(cp);
333 }
334 
335 static void
336 print_mdoc_nodelist(MDOC_ARGS)
337 {
338 
339 	while (n != NULL) {
340 		print_mdoc_node(meta, n, h);
341 		n = n->next;
342 	}
343 }
344 
345 static void
346 print_mdoc_node(MDOC_ARGS)
347 {
348 	struct tag	*t;
349 	int		 child;
350 
351 	if (n->type == ROFFT_COMMENT || n->flags & NODE_NOPRT)
352 		return;
353 
354 	html_fillmode(h, n->flags & NODE_NOFILL ? ROFF_nf : ROFF_fi);
355 
356 	child = 1;
357 	n->flags &= ~NODE_ENDED;
358 	switch (n->type) {
359 	case ROFFT_TEXT:
360 		t = h->tag;
361 		t->refcnt++;
362 
363 		/* No tables in this mode... */
364 		assert(NULL == h->tblt);
365 
366 		/*
367 		 * Make sure that if we're in a literal mode already
368 		 * (i.e., within a <PRE>) don't print the newline.
369 		 */
370 		if (*n->string == ' ' && n->flags & NODE_LINE &&
371 		    (h->flags & HTML_NONEWLINE) == 0 &&
372 		    (n->flags & NODE_NOFILL) == 0)
373 			print_otag(h, TAG_BR, "");
374 		if (NODE_DELIMC & n->flags)
375 			h->flags |= HTML_NOSPACE;
376 		print_text(h, n->string);
377 		if (NODE_DELIMO & n->flags)
378 			h->flags |= HTML_NOSPACE;
379 		break;
380 	case ROFFT_EQN:
381 		t = h->tag;
382 		t->refcnt++;
383 		print_eqn(h, n->eqn);
384 		break;
385 	case ROFFT_TBL:
386 		/*
387 		 * This will take care of initialising all of the table
388 		 * state data for the first table, then tearing it down
389 		 * for the last one.
390 		 */
391 		print_tbl(h, n->span);
392 		return;
393 	default:
394 		/*
395 		 * Close out the current table, if it's open, and unset
396 		 * the "meta" table state.  This will be reopened on the
397 		 * next table element.
398 		 */
399 		if (h->tblt != NULL)
400 			print_tblclose(h);
401 		assert(h->tblt == NULL);
402 		t = h->tag;
403 		t->refcnt++;
404 		if (n->tok < ROFF_MAX) {
405 			roff_html_pre(h, n);
406 			t->refcnt--;
407 			print_stagq(h, t);
408 			return;
409 		}
410 		assert(n->tok >= MDOC_Dd && n->tok < MDOC_MAX);
411 		if (mdoc_html_acts[n->tok - MDOC_Dd].pre != NULL &&
412 		    (n->end == ENDBODY_NOT || n->child != NULL))
413 			child = (*mdoc_html_acts[n->tok - MDOC_Dd].pre)(meta,
414 			    n, h);
415 		break;
416 	}
417 
418 	if (h->flags & HTML_KEEP && n->flags & NODE_LINE) {
419 		h->flags &= ~HTML_KEEP;
420 		h->flags |= HTML_PREKEEP;
421 	}
422 
423 	if (child && n->child != NULL)
424 		print_mdoc_nodelist(meta, n->child, h);
425 
426 	t->refcnt--;
427 	print_stagq(h, t);
428 
429 	switch (n->type) {
430 	case ROFFT_TEXT:
431 	case ROFFT_EQN:
432 		break;
433 	default:
434 		if (mdoc_html_acts[n->tok - MDOC_Dd].post == NULL ||
435 		    n->flags & NODE_ENDED)
436 			break;
437 		(*mdoc_html_acts[n->tok - MDOC_Dd].post)(meta, n, h);
438 		if (n->end != ENDBODY_NOT)
439 			n->body->flags |= NODE_ENDED;
440 		break;
441 	}
442 
443 	if (n->flags & NODE_NOFILL &&
444 	    (n->next == NULL || n->next->flags & NODE_LINE)) {
445 		h->col++;
446 		print_endline(h);
447 	}
448 }
449 
450 static void
451 mdoc_root_post(const struct roff_meta *meta, struct html *h)
452 {
453 	struct tag	*t, *tt;
454 
455 	t = print_otag(h, TAG_TABLE, "c", "foot");
456 	tt = print_otag(h, TAG_TR, "");
457 
458 	print_otag(h, TAG_TD, "c", "foot-date");
459 	print_text(h, meta->date);
460 	print_stagq(h, tt);
461 
462 	print_otag(h, TAG_TD, "c", "foot-os");
463 	print_text(h, meta->os);
464 	print_tagq(h, t);
465 }
466 
467 static int
468 mdoc_root_pre(const struct roff_meta *meta, struct html *h)
469 {
470 	struct tag	*t, *tt;
471 	char		*volume, *title;
472 
473 	if (NULL == meta->arch)
474 		volume = mandoc_strdup(meta->vol);
475 	else
476 		mandoc_asprintf(&volume, "%s (%s)",
477 		    meta->vol, meta->arch);
478 
479 	if (NULL == meta->msec)
480 		title = mandoc_strdup(meta->title);
481 	else
482 		mandoc_asprintf(&title, "%s(%s)",
483 		    meta->title, meta->msec);
484 
485 	t = print_otag(h, TAG_TABLE, "c", "head");
486 	tt = print_otag(h, TAG_TR, "");
487 
488 	print_otag(h, TAG_TD, "c", "head-ltitle");
489 	print_text(h, title);
490 	print_stagq(h, tt);
491 
492 	print_otag(h, TAG_TD, "c", "head-vol");
493 	print_text(h, volume);
494 	print_stagq(h, tt);
495 
496 	print_otag(h, TAG_TD, "c", "head-rtitle");
497 	print_text(h, title);
498 	print_tagq(h, t);
499 
500 	free(title);
501 	free(volume);
502 	return 1;
503 }
504 
505 static char *
506 cond_id(const struct roff_node *n)
507 {
508 	if (n->child != NULL &&
509 	    n->child->type == ROFFT_TEXT &&
510 	    (n->prev == NULL ||
511 	     (n->prev->type == ROFFT_TEXT &&
512 	      strcmp(n->prev->string, "|") == 0)) &&
513 	    (n->parent->tok == MDOC_It ||
514 	     (n->parent->tok == MDOC_Xo &&
515 	      n->parent->parent->prev == NULL &&
516 	      n->parent->parent->parent->tok == MDOC_It)))
517 		return html_make_id(n, 1);
518 	return NULL;
519 }
520 
521 static int
522 mdoc_sh_pre(MDOC_ARGS)
523 {
524 	struct roff_node	*sn, *subn;
525 	struct tag		*t, *tsec, *tsub;
526 	char			*id;
527 	int			 sc;
528 
529 	switch (n->type) {
530 	case ROFFT_BLOCK:
531 		html_close_paragraph(h);
532 		if ((h->oflags & HTML_TOC) == 0 ||
533 		    h->flags & HTML_TOCDONE ||
534 		    n->sec <= SEC_SYNOPSIS) {
535 			print_otag(h, TAG_SECTION, "c", "Sh");
536 			break;
537 		}
538 		h->flags |= HTML_TOCDONE;
539 		sc = 0;
540 		for (sn = n->next; sn != NULL; sn = sn->next)
541 			if (sn->sec == SEC_CUSTOM)
542 				if (++sc == 2)
543 					break;
544 		if (sc < 2)
545 			break;
546 		t = print_otag(h, TAG_H1, "c", "Sh");
547 		print_text(h, "TABLE OF CONTENTS");
548 		print_tagq(h, t);
549 		t = print_otag(h, TAG_UL, "c", "Bl-compact");
550 		for (sn = n; sn != NULL; sn = sn->next) {
551 			tsec = print_otag(h, TAG_LI, "");
552 			id = html_make_id(sn->head, 0);
553 			tsub = print_otag(h, TAG_A, "hR", id);
554 			free(id);
555 			print_mdoc_nodelist(meta, sn->head->child, h);
556 			print_tagq(h, tsub);
557 			tsub = NULL;
558 			for (subn = sn->body->child; subn != NULL;
559 			    subn = subn->next) {
560 				if (subn->tok != MDOC_Ss)
561 					continue;
562 				id = html_make_id(subn->head, 0);
563 				if (id == NULL)
564 					continue;
565 				if (tsub == NULL)
566 					print_otag(h, TAG_UL,
567 					    "c", "Bl-compact");
568 				tsub = print_otag(h, TAG_LI, "");
569 				print_otag(h, TAG_A, "hR", id);
570 				free(id);
571 				print_mdoc_nodelist(meta,
572 				    subn->head->child, h);
573 				print_tagq(h, tsub);
574 			}
575 			print_tagq(h, tsec);
576 		}
577 		print_tagq(h, t);
578 		print_otag(h, TAG_SECTION, "c", "Sh");
579 		break;
580 	case ROFFT_HEAD:
581 		id = html_make_id(n, 1);
582 		print_otag(h, TAG_H1, "ci", "Sh", id);
583 		if (id != NULL)
584 			print_otag(h, TAG_A, "chR", "permalink", id);
585 		break;
586 	case ROFFT_BODY:
587 		if (n->sec == SEC_AUTHORS)
588 			h->flags &= ~(HTML_SPLIT|HTML_NOSPLIT);
589 		break;
590 	default:
591 		break;
592 	}
593 	return 1;
594 }
595 
596 static int
597 mdoc_ss_pre(MDOC_ARGS)
598 {
599 	char	*id;
600 
601 	switch (n->type) {
602 	case ROFFT_BLOCK:
603 		html_close_paragraph(h);
604 		print_otag(h, TAG_SECTION, "c", "Ss");
605 		return 1;
606 	case ROFFT_HEAD:
607 		break;
608 	case ROFFT_BODY:
609 		return 1;
610 	default:
611 		abort();
612 	}
613 
614 	id = html_make_id(n, 1);
615 	print_otag(h, TAG_H2, "ci", "Ss", id);
616 	if (id != NULL)
617 		print_otag(h, TAG_A, "chR", "permalink", id);
618 	return 1;
619 }
620 
621 static int
622 mdoc_fl_pre(MDOC_ARGS)
623 {
624 	char	*id;
625 
626 	if ((id = cond_id(n)) != NULL)
627 		print_otag(h, TAG_A, "chR", "permalink", id);
628 	print_otag(h, TAG_CODE, "ci", "Fl", id);
629 
630 	print_text(h, "\\-");
631 	if (!(n->child == NULL &&
632 	    (n->next == NULL ||
633 	     n->next->type == ROFFT_TEXT ||
634 	     n->next->flags & NODE_LINE)))
635 		h->flags |= HTML_NOSPACE;
636 
637 	return 1;
638 }
639 
640 static int
641 mdoc_cm_pre(MDOC_ARGS)
642 {
643 	char	*id;
644 
645 	if ((id = cond_id(n)) != NULL)
646 		print_otag(h, TAG_A, "chR", "permalink", id);
647 	print_otag(h, TAG_CODE, "ci", "Cm", id);
648 	return 1;
649 }
650 
651 static int
652 mdoc_nd_pre(MDOC_ARGS)
653 {
654 	switch (n->type) {
655 	case ROFFT_BLOCK:
656 		html_close_paragraph(h);
657 		return 1;
658 	case ROFFT_HEAD:
659 		return 0;
660 	case ROFFT_BODY:
661 		break;
662 	default:
663 		abort();
664 	}
665 	print_text(h, "\\(em");
666 	/* Cannot use TAG_SPAN because it may contain blocks. */
667 	print_otag(h, TAG_DIV, "c", "Nd");
668 	return 1;
669 }
670 
671 static int
672 mdoc_nm_pre(MDOC_ARGS)
673 {
674 	switch (n->type) {
675 	case ROFFT_BLOCK:
676 		break;
677 	case ROFFT_HEAD:
678 		print_otag(h, TAG_TD, "");
679 		/* FALLTHROUGH */
680 	case ROFFT_ELEM:
681 		print_otag(h, TAG_CODE, "c", "Nm");
682 		return 1;
683 	case ROFFT_BODY:
684 		print_otag(h, TAG_TD, "");
685 		return 1;
686 	default:
687 		abort();
688 	}
689 	html_close_paragraph(h);
690 	synopsis_pre(h, n);
691 	print_otag(h, TAG_TABLE, "c", "Nm");
692 	print_otag(h, TAG_TR, "");
693 	return 1;
694 }
695 
696 static int
697 mdoc_xr_pre(MDOC_ARGS)
698 {
699 	if (NULL == n->child)
700 		return 0;
701 
702 	if (h->base_man1)
703 		print_otag(h, TAG_A, "chM", "Xr",
704 		    n->child->string, n->child->next == NULL ?
705 		    NULL : n->child->next->string);
706 	else
707 		print_otag(h, TAG_A, "c", "Xr");
708 
709 	n = n->child;
710 	print_text(h, n->string);
711 
712 	if (NULL == (n = n->next))
713 		return 0;
714 
715 	h->flags |= HTML_NOSPACE;
716 	print_text(h, "(");
717 	h->flags |= HTML_NOSPACE;
718 	print_text(h, n->string);
719 	h->flags |= HTML_NOSPACE;
720 	print_text(h, ")");
721 	return 0;
722 }
723 
724 static int
725 mdoc_ns_pre(MDOC_ARGS)
726 {
727 
728 	if ( ! (NODE_LINE & n->flags))
729 		h->flags |= HTML_NOSPACE;
730 	return 1;
731 }
732 
733 static int
734 mdoc_ar_pre(MDOC_ARGS)
735 {
736 	print_otag(h, TAG_VAR, "c", "Ar");
737 	return 1;
738 }
739 
740 static int
741 mdoc_xx_pre(MDOC_ARGS)
742 {
743 	print_otag(h, TAG_SPAN, "c", "Ux");
744 	return 1;
745 }
746 
747 static int
748 mdoc_it_pre(MDOC_ARGS)
749 {
750 	const struct roff_node	*bl;
751 	enum mdoc_list		 type;
752 
753 	bl = n->parent;
754 	while (bl->tok != MDOC_Bl)
755 		bl = bl->parent;
756 	type = bl->norm->Bl.type;
757 
758 	switch (type) {
759 	case LIST_bullet:
760 	case LIST_dash:
761 	case LIST_hyphen:
762 	case LIST_item:
763 	case LIST_enum:
764 		switch (n->type) {
765 		case ROFFT_HEAD:
766 			return 0;
767 		case ROFFT_BODY:
768 			print_otag(h, TAG_LI, "");
769 			break;
770 		default:
771 			break;
772 		}
773 		break;
774 	case LIST_diag:
775 	case LIST_hang:
776 	case LIST_inset:
777 	case LIST_ohang:
778 		switch (n->type) {
779 		case ROFFT_HEAD:
780 			print_otag(h, TAG_DT, "");
781 			break;
782 		case ROFFT_BODY:
783 			print_otag(h, TAG_DD, "");
784 			break;
785 		default:
786 			break;
787 		}
788 		break;
789 	case LIST_tag:
790 		switch (n->type) {
791 		case ROFFT_HEAD:
792 			print_otag(h, TAG_DT, "");
793 			break;
794 		case ROFFT_BODY:
795 			if (n->child == NULL) {
796 				print_otag(h, TAG_DD, "s", "width", "auto");
797 				print_text(h, "\\ ");
798 			} else
799 				print_otag(h, TAG_DD, "");
800 			break;
801 		default:
802 			break;
803 		}
804 		break;
805 	case LIST_column:
806 		switch (n->type) {
807 		case ROFFT_HEAD:
808 			break;
809 		case ROFFT_BODY:
810 			print_otag(h, TAG_TD, "");
811 			break;
812 		default:
813 			print_otag(h, TAG_TR, "");
814 		}
815 	default:
816 		break;
817 	}
818 
819 	return 1;
820 }
821 
822 static int
823 mdoc_bl_pre(MDOC_ARGS)
824 {
825 	char		 cattr[32];
826 	struct mdoc_bl	*bl;
827 	enum htmltag	 elemtype;
828 
829 	switch (n->type) {
830 	case ROFFT_BLOCK:
831 		html_close_paragraph(h);
832 		break;
833 	case ROFFT_HEAD:
834 		return 0;
835 	case ROFFT_BODY:
836 		return 1;
837 	default:
838 		abort();
839 	}
840 
841 	bl = &n->norm->Bl;
842 	switch (bl->type) {
843 	case LIST_bullet:
844 		elemtype = TAG_UL;
845 		(void)strlcpy(cattr, "Bl-bullet", sizeof(cattr));
846 		break;
847 	case LIST_dash:
848 	case LIST_hyphen:
849 		elemtype = TAG_UL;
850 		(void)strlcpy(cattr, "Bl-dash", sizeof(cattr));
851 		break;
852 	case LIST_item:
853 		elemtype = TAG_UL;
854 		(void)strlcpy(cattr, "Bl-item", sizeof(cattr));
855 		break;
856 	case LIST_enum:
857 		elemtype = TAG_OL;
858 		(void)strlcpy(cattr, "Bl-enum", sizeof(cattr));
859 		break;
860 	case LIST_diag:
861 		elemtype = TAG_DL;
862 		(void)strlcpy(cattr, "Bl-diag", sizeof(cattr));
863 		break;
864 	case LIST_hang:
865 		elemtype = TAG_DL;
866 		(void)strlcpy(cattr, "Bl-hang", sizeof(cattr));
867 		break;
868 	case LIST_inset:
869 		elemtype = TAG_DL;
870 		(void)strlcpy(cattr, "Bl-inset", sizeof(cattr));
871 		break;
872 	case LIST_ohang:
873 		elemtype = TAG_DL;
874 		(void)strlcpy(cattr, "Bl-ohang", sizeof(cattr));
875 		break;
876 	case LIST_tag:
877 		if (bl->offs)
878 			print_otag(h, TAG_DIV, "c", "Bd-indent");
879 		print_otag(h, TAG_DL, "c", bl->comp ?
880 		    "Bl-tag Bl-compact" : "Bl-tag");
881 		return 1;
882 	case LIST_column:
883 		elemtype = TAG_TABLE;
884 		(void)strlcpy(cattr, "Bl-column", sizeof(cattr));
885 		break;
886 	default:
887 		abort();
888 	}
889 	if (bl->offs != NULL)
890 		(void)strlcat(cattr, " Bd-indent", sizeof(cattr));
891 	if (bl->comp)
892 		(void)strlcat(cattr, " Bl-compact", sizeof(cattr));
893 	print_otag(h, elemtype, "c", cattr);
894 	return 1;
895 }
896 
897 static int
898 mdoc_ex_pre(MDOC_ARGS)
899 {
900 	if (n->prev)
901 		print_otag(h, TAG_BR, "");
902 	return 1;
903 }
904 
905 static int
906 mdoc_st_pre(MDOC_ARGS)
907 {
908 	print_otag(h, TAG_SPAN, "c", "St");
909 	return 1;
910 }
911 
912 static int
913 mdoc_em_pre(MDOC_ARGS)
914 {
915 	print_otag(h, TAG_I, "c", "Em");
916 	return 1;
917 }
918 
919 static int
920 mdoc_d1_pre(MDOC_ARGS)
921 {
922 	switch (n->type) {
923 	case ROFFT_BLOCK:
924 		html_close_paragraph(h);
925 		break;
926 	case ROFFT_HEAD:
927 		return 0;
928 	case ROFFT_BODY:
929 		return 1;
930 	default:
931 		abort();
932 	}
933 	print_otag(h, TAG_DIV, "c", "Bd Bd-indent");
934 	if (n->tok == MDOC_Dl)
935 		print_otag(h, TAG_CODE, "c", "Li");
936 	return 1;
937 }
938 
939 static int
940 mdoc_sx_pre(MDOC_ARGS)
941 {
942 	char	*id;
943 
944 	id = html_make_id(n, 0);
945 	print_otag(h, TAG_A, "chR", "Sx", id);
946 	free(id);
947 	return 1;
948 }
949 
950 static int
951 mdoc_bd_pre(MDOC_ARGS)
952 {
953 	char			 buf[16];
954 	struct roff_node	*nn;
955 	int			 comp;
956 
957 	switch (n->type) {
958 	case ROFFT_BLOCK:
959 		html_close_paragraph(h);
960 		return 1;
961 	case ROFFT_HEAD:
962 		return 0;
963 	case ROFFT_BODY:
964 		break;
965 	default:
966 		abort();
967 	}
968 
969 	/* Handle preceding whitespace. */
970 
971 	comp = n->norm->Bd.comp;
972 	for (nn = n; nn != NULL && comp == 0; nn = nn->parent) {
973 		if (nn->type != ROFFT_BLOCK)
974 			continue;
975 		if (nn->tok == MDOC_Sh || nn->tok == MDOC_Ss)
976 			comp = 1;
977 		if (nn->prev != NULL)
978 			break;
979 	}
980 	(void)strlcpy(buf, "Bd", sizeof(buf));
981 	if (comp == 0)
982 		(void)strlcat(buf, " Pp", sizeof(buf));
983 
984 	/* Handle the -offset argument. */
985 
986 	if (n->norm->Bd.offs != NULL &&
987 	    strcmp(n->norm->Bd.offs, "left") != 0)
988 		(void)strlcat(buf, " Bd-indent", sizeof(buf));
989 
990 	print_otag(h, TAG_DIV, "c", buf);
991 	return 1;
992 }
993 
994 static int
995 mdoc_pa_pre(MDOC_ARGS)
996 {
997 	print_otag(h, TAG_SPAN, "c", "Pa");
998 	return 1;
999 }
1000 
1001 static int
1002 mdoc_ad_pre(MDOC_ARGS)
1003 {
1004 	print_otag(h, TAG_SPAN, "c", "Ad");
1005 	return 1;
1006 }
1007 
1008 static int
1009 mdoc_an_pre(MDOC_ARGS)
1010 {
1011 	if (n->norm->An.auth == AUTH_split) {
1012 		h->flags &= ~HTML_NOSPLIT;
1013 		h->flags |= HTML_SPLIT;
1014 		return 0;
1015 	}
1016 	if (n->norm->An.auth == AUTH_nosplit) {
1017 		h->flags &= ~HTML_SPLIT;
1018 		h->flags |= HTML_NOSPLIT;
1019 		return 0;
1020 	}
1021 
1022 	if (h->flags & HTML_SPLIT)
1023 		print_otag(h, TAG_BR, "");
1024 
1025 	if (n->sec == SEC_AUTHORS && ! (h->flags & HTML_NOSPLIT))
1026 		h->flags |= HTML_SPLIT;
1027 
1028 	print_otag(h, TAG_SPAN, "c", "An");
1029 	return 1;
1030 }
1031 
1032 static int
1033 mdoc_cd_pre(MDOC_ARGS)
1034 {
1035 	synopsis_pre(h, n);
1036 	print_otag(h, TAG_CODE, "c", "Cd");
1037 	return 1;
1038 }
1039 
1040 static int
1041 mdoc_dv_pre(MDOC_ARGS)
1042 {
1043 	char	*id;
1044 
1045 	if ((id = cond_id(n)) != NULL)
1046 		print_otag(h, TAG_A, "chR", "permalink", id);
1047 	print_otag(h, TAG_CODE, "ci", "Dv", id);
1048 	return 1;
1049 }
1050 
1051 static int
1052 mdoc_ev_pre(MDOC_ARGS)
1053 {
1054 	char	*id;
1055 
1056 	if ((id = cond_id(n)) != NULL)
1057 		print_otag(h, TAG_A, "chR", "permalink", id);
1058 	print_otag(h, TAG_CODE, "ci", "Ev", id);
1059 	return 1;
1060 }
1061 
1062 static int
1063 mdoc_er_pre(MDOC_ARGS)
1064 {
1065 	char	*id;
1066 
1067 	id = n->sec == SEC_ERRORS &&
1068 	    (n->parent->tok == MDOC_It ||
1069 	     (n->parent->tok == MDOC_Bq &&
1070 	      n->parent->parent->parent->tok == MDOC_It)) ?
1071 	    html_make_id(n, 1) : NULL;
1072 
1073 	if (id != NULL)
1074 		print_otag(h, TAG_A, "chR", "permalink", id);
1075 	print_otag(h, TAG_CODE, "ci", "Er", id);
1076 	return 1;
1077 }
1078 
1079 static int
1080 mdoc_fa_pre(MDOC_ARGS)
1081 {
1082 	const struct roff_node	*nn;
1083 	struct tag		*t;
1084 
1085 	if (n->parent->tok != MDOC_Fo) {
1086 		print_otag(h, TAG_VAR, "c", "Fa");
1087 		return 1;
1088 	}
1089 
1090 	for (nn = n->child; nn; nn = nn->next) {
1091 		t = print_otag(h, TAG_VAR, "c", "Fa");
1092 		print_text(h, nn->string);
1093 		print_tagq(h, t);
1094 		if (nn->next) {
1095 			h->flags |= HTML_NOSPACE;
1096 			print_text(h, ",");
1097 		}
1098 	}
1099 
1100 	if (n->child && n->next && n->next->tok == MDOC_Fa) {
1101 		h->flags |= HTML_NOSPACE;
1102 		print_text(h, ",");
1103 	}
1104 
1105 	return 0;
1106 }
1107 
1108 static int
1109 mdoc_fd_pre(MDOC_ARGS)
1110 {
1111 	struct tag	*t;
1112 	char		*buf, *cp;
1113 
1114 	synopsis_pre(h, n);
1115 
1116 	if (NULL == (n = n->child))
1117 		return 0;
1118 
1119 	assert(n->type == ROFFT_TEXT);
1120 
1121 	if (strcmp(n->string, "#include")) {
1122 		print_otag(h, TAG_CODE, "c", "Fd");
1123 		return 1;
1124 	}
1125 
1126 	print_otag(h, TAG_CODE, "c", "In");
1127 	print_text(h, n->string);
1128 
1129 	if (NULL != (n = n->next)) {
1130 		assert(n->type == ROFFT_TEXT);
1131 
1132 		if (h->base_includes) {
1133 			cp = n->string;
1134 			if (*cp == '<' || *cp == '"')
1135 				cp++;
1136 			buf = mandoc_strdup(cp);
1137 			cp = strchr(buf, '\0') - 1;
1138 			if (cp >= buf && (*cp == '>' || *cp == '"'))
1139 				*cp = '\0';
1140 			t = print_otag(h, TAG_A, "chI", "In", buf);
1141 			free(buf);
1142 		} else
1143 			t = print_otag(h, TAG_A, "c", "In");
1144 
1145 		print_text(h, n->string);
1146 		print_tagq(h, t);
1147 
1148 		n = n->next;
1149 	}
1150 
1151 	for ( ; n; n = n->next) {
1152 		assert(n->type == ROFFT_TEXT);
1153 		print_text(h, n->string);
1154 	}
1155 
1156 	return 0;
1157 }
1158 
1159 static int
1160 mdoc_vt_pre(MDOC_ARGS)
1161 {
1162 	if (n->type == ROFFT_BLOCK) {
1163 		synopsis_pre(h, n);
1164 		return 1;
1165 	} else if (n->type == ROFFT_ELEM) {
1166 		synopsis_pre(h, n);
1167 	} else if (n->type == ROFFT_HEAD)
1168 		return 0;
1169 
1170 	print_otag(h, TAG_VAR, "c", "Vt");
1171 	return 1;
1172 }
1173 
1174 static int
1175 mdoc_ft_pre(MDOC_ARGS)
1176 {
1177 	synopsis_pre(h, n);
1178 	print_otag(h, TAG_VAR, "c", "Ft");
1179 	return 1;
1180 }
1181 
1182 static int
1183 mdoc_fn_pre(MDOC_ARGS)
1184 {
1185 	struct tag	*t;
1186 	char		 nbuf[BUFSIZ];
1187 	const char	*sp, *ep;
1188 	int		 sz, pretty;
1189 
1190 	pretty = NODE_SYNPRETTY & n->flags;
1191 	synopsis_pre(h, n);
1192 
1193 	/* Split apart into type and name. */
1194 	assert(n->child->string);
1195 	sp = n->child->string;
1196 
1197 	ep = strchr(sp, ' ');
1198 	if (NULL != ep) {
1199 		t = print_otag(h, TAG_VAR, "c", "Ft");
1200 
1201 		while (ep) {
1202 			sz = MIN((int)(ep - sp), BUFSIZ - 1);
1203 			(void)memcpy(nbuf, sp, (size_t)sz);
1204 			nbuf[sz] = '\0';
1205 			print_text(h, nbuf);
1206 			sp = ++ep;
1207 			ep = strchr(sp, ' ');
1208 		}
1209 		print_tagq(h, t);
1210 	}
1211 
1212 	t = print_otag(h, TAG_CODE, "c", "Fn");
1213 
1214 	if (sp)
1215 		print_text(h, sp);
1216 
1217 	print_tagq(h, t);
1218 
1219 	h->flags |= HTML_NOSPACE;
1220 	print_text(h, "(");
1221 	h->flags |= HTML_NOSPACE;
1222 
1223 	for (n = n->child->next; n; n = n->next) {
1224 		if (NODE_SYNPRETTY & n->flags)
1225 			t = print_otag(h, TAG_VAR, "cs", "Fa",
1226 			    "white-space", "nowrap");
1227 		else
1228 			t = print_otag(h, TAG_VAR, "c", "Fa");
1229 		print_text(h, n->string);
1230 		print_tagq(h, t);
1231 		if (n->next) {
1232 			h->flags |= HTML_NOSPACE;
1233 			print_text(h, ",");
1234 		}
1235 	}
1236 
1237 	h->flags |= HTML_NOSPACE;
1238 	print_text(h, ")");
1239 
1240 	if (pretty) {
1241 		h->flags |= HTML_NOSPACE;
1242 		print_text(h, ";");
1243 	}
1244 
1245 	return 0;
1246 }
1247 
1248 static int
1249 mdoc_sm_pre(MDOC_ARGS)
1250 {
1251 
1252 	if (NULL == n->child)
1253 		h->flags ^= HTML_NONOSPACE;
1254 	else if (0 == strcmp("on", n->child->string))
1255 		h->flags &= ~HTML_NONOSPACE;
1256 	else
1257 		h->flags |= HTML_NONOSPACE;
1258 
1259 	if ( ! (HTML_NONOSPACE & h->flags))
1260 		h->flags &= ~HTML_NOSPACE;
1261 
1262 	return 0;
1263 }
1264 
1265 static int
1266 mdoc_skip_pre(MDOC_ARGS)
1267 {
1268 
1269 	return 0;
1270 }
1271 
1272 static int
1273 mdoc_pp_pre(MDOC_ARGS)
1274 {
1275 	if ((n->flags & NODE_NOFILL) == 0) {
1276 		html_close_paragraph(h);
1277 		print_otag(h, TAG_P, "c", "Pp");
1278 	}
1279 	return 0;
1280 }
1281 
1282 static int
1283 mdoc_lk_pre(MDOC_ARGS)
1284 {
1285 	const struct roff_node *link, *descr, *punct;
1286 	struct tag	*t;
1287 
1288 	if ((link = n->child) == NULL)
1289 		return 0;
1290 
1291 	/* Find beginning of trailing punctuation. */
1292 	punct = n->last;
1293 	while (punct != link && punct->flags & NODE_DELIMC)
1294 		punct = punct->prev;
1295 	punct = punct->next;
1296 
1297 	/* Link target and link text. */
1298 	descr = link->next;
1299 	if (descr == punct)
1300 		descr = link;  /* no text */
1301 	t = print_otag(h, TAG_A, "ch", "Lk", link->string);
1302 	do {
1303 		if (descr->flags & (NODE_DELIMC | NODE_DELIMO))
1304 			h->flags |= HTML_NOSPACE;
1305 		print_text(h, descr->string);
1306 		descr = descr->next;
1307 	} while (descr != punct);
1308 	print_tagq(h, t);
1309 
1310 	/* Trailing punctuation. */
1311 	while (punct != NULL) {
1312 		h->flags |= HTML_NOSPACE;
1313 		print_text(h, punct->string);
1314 		punct = punct->next;
1315 	}
1316 	return 0;
1317 }
1318 
1319 static int
1320 mdoc_mt_pre(MDOC_ARGS)
1321 {
1322 	struct tag	*t;
1323 	char		*cp;
1324 
1325 	for (n = n->child; n; n = n->next) {
1326 		assert(n->type == ROFFT_TEXT);
1327 
1328 		mandoc_asprintf(&cp, "mailto:%s", n->string);
1329 		t = print_otag(h, TAG_A, "ch", "Mt", cp);
1330 		print_text(h, n->string);
1331 		print_tagq(h, t);
1332 		free(cp);
1333 	}
1334 
1335 	return 0;
1336 }
1337 
1338 static int
1339 mdoc_fo_pre(MDOC_ARGS)
1340 {
1341 	struct tag	*t;
1342 
1343 	if (n->type == ROFFT_BODY) {
1344 		h->flags |= HTML_NOSPACE;
1345 		print_text(h, "(");
1346 		h->flags |= HTML_NOSPACE;
1347 		return 1;
1348 	} else if (n->type == ROFFT_BLOCK) {
1349 		synopsis_pre(h, n);
1350 		return 1;
1351 	}
1352 
1353 	if (n->child == NULL)
1354 		return 0;
1355 
1356 	assert(n->child->string);
1357 	t = print_otag(h, TAG_CODE, "c", "Fn");
1358 	print_text(h, n->child->string);
1359 	print_tagq(h, t);
1360 	return 0;
1361 }
1362 
1363 static void
1364 mdoc_fo_post(MDOC_ARGS)
1365 {
1366 
1367 	if (n->type != ROFFT_BODY)
1368 		return;
1369 	h->flags |= HTML_NOSPACE;
1370 	print_text(h, ")");
1371 	h->flags |= HTML_NOSPACE;
1372 	print_text(h, ";");
1373 }
1374 
1375 static int
1376 mdoc_in_pre(MDOC_ARGS)
1377 {
1378 	struct tag	*t;
1379 
1380 	synopsis_pre(h, n);
1381 	print_otag(h, TAG_CODE, "c", "In");
1382 
1383 	/*
1384 	 * The first argument of the `In' gets special treatment as
1385 	 * being a linked value.  Subsequent values are printed
1386 	 * afterward.  groff does similarly.  This also handles the case
1387 	 * of no children.
1388 	 */
1389 
1390 	if (NODE_SYNPRETTY & n->flags && NODE_LINE & n->flags)
1391 		print_text(h, "#include");
1392 
1393 	print_text(h, "<");
1394 	h->flags |= HTML_NOSPACE;
1395 
1396 	if (NULL != (n = n->child)) {
1397 		assert(n->type == ROFFT_TEXT);
1398 
1399 		if (h->base_includes)
1400 			t = print_otag(h, TAG_A, "chI", "In", n->string);
1401 		else
1402 			t = print_otag(h, TAG_A, "c", "In");
1403 		print_text(h, n->string);
1404 		print_tagq(h, t);
1405 
1406 		n = n->next;
1407 	}
1408 
1409 	h->flags |= HTML_NOSPACE;
1410 	print_text(h, ">");
1411 
1412 	for ( ; n; n = n->next) {
1413 		assert(n->type == ROFFT_TEXT);
1414 		print_text(h, n->string);
1415 	}
1416 
1417 	return 0;
1418 }
1419 
1420 static int
1421 mdoc_ic_pre(MDOC_ARGS)
1422 {
1423 	char	*id;
1424 
1425 	if ((id = cond_id(n)) != NULL)
1426 		print_otag(h, TAG_A, "chR", "permalink", id);
1427 	print_otag(h, TAG_CODE, "ci", "Ic", id);
1428 	return 1;
1429 }
1430 
1431 static int
1432 mdoc_va_pre(MDOC_ARGS)
1433 {
1434 	print_otag(h, TAG_VAR, "c", "Va");
1435 	return 1;
1436 }
1437 
1438 static int
1439 mdoc_ap_pre(MDOC_ARGS)
1440 {
1441 
1442 	h->flags |= HTML_NOSPACE;
1443 	print_text(h, "\\(aq");
1444 	h->flags |= HTML_NOSPACE;
1445 	return 1;
1446 }
1447 
1448 static int
1449 mdoc_bf_pre(MDOC_ARGS)
1450 {
1451 	const char	*cattr;
1452 
1453 	switch (n->type) {
1454 	case ROFFT_BLOCK:
1455 		html_close_paragraph(h);
1456 		return 1;
1457 	case ROFFT_HEAD:
1458 		return 0;
1459 	case ROFFT_BODY:
1460 		break;
1461 	default:
1462 		abort();
1463 	}
1464 
1465 	if (FONT_Em == n->norm->Bf.font)
1466 		cattr = "Bf Em";
1467 	else if (FONT_Sy == n->norm->Bf.font)
1468 		cattr = "Bf Sy";
1469 	else if (FONT_Li == n->norm->Bf.font)
1470 		cattr = "Bf Li";
1471 	else
1472 		cattr = "Bf No";
1473 
1474 	/* Cannot use TAG_SPAN because it may contain blocks. */
1475 	print_otag(h, TAG_DIV, "c", cattr);
1476 	return 1;
1477 }
1478 
1479 static int
1480 mdoc_ms_pre(MDOC_ARGS)
1481 {
1482 	char *id;
1483 
1484 	if ((id = cond_id(n)) != NULL)
1485 		print_otag(h, TAG_A, "chR", "permalink", id);
1486 	print_otag(h, TAG_SPAN, "ci", "Ms", id);
1487 	return 1;
1488 }
1489 
1490 static int
1491 mdoc_igndelim_pre(MDOC_ARGS)
1492 {
1493 
1494 	h->flags |= HTML_IGNDELIM;
1495 	return 1;
1496 }
1497 
1498 static void
1499 mdoc_pf_post(MDOC_ARGS)
1500 {
1501 
1502 	if ( ! (n->next == NULL || n->next->flags & NODE_LINE))
1503 		h->flags |= HTML_NOSPACE;
1504 }
1505 
1506 static int
1507 mdoc_rs_pre(MDOC_ARGS)
1508 {
1509 	switch (n->type) {
1510 	case ROFFT_BLOCK:
1511 		if (n->sec == SEC_SEE_ALSO)
1512 			html_close_paragraph(h);
1513 		break;
1514 	case ROFFT_HEAD:
1515 		return 0;
1516 	case ROFFT_BODY:
1517 		if (n->sec == SEC_SEE_ALSO)
1518 			print_otag(h, TAG_P, "c", "Pp");
1519 		print_otag(h, TAG_CITE, "c", "Rs");
1520 		break;
1521 	default:
1522 		abort();
1523 	}
1524 	return 1;
1525 }
1526 
1527 static int
1528 mdoc_no_pre(MDOC_ARGS)
1529 {
1530 	char *id;
1531 
1532 	if ((id = cond_id(n)) != NULL)
1533 		print_otag(h, TAG_A, "chR", "permalink", id);
1534 	print_otag(h, TAG_SPAN, "ci", "No", id);
1535 	return 1;
1536 }
1537 
1538 static int
1539 mdoc_li_pre(MDOC_ARGS)
1540 {
1541 	char	*id;
1542 
1543 	if ((id = cond_id(n)) != NULL)
1544 		print_otag(h, TAG_A, "chR", "permalink", id);
1545 	print_otag(h, TAG_CODE, "ci", "Li", id);
1546 	return 1;
1547 }
1548 
1549 static int
1550 mdoc_sy_pre(MDOC_ARGS)
1551 {
1552 	print_otag(h, TAG_B, "c", "Sy");
1553 	return 1;
1554 }
1555 
1556 static int
1557 mdoc_lb_pre(MDOC_ARGS)
1558 {
1559 	if (SEC_LIBRARY == n->sec && NODE_LINE & n->flags && n->prev)
1560 		print_otag(h, TAG_BR, "");
1561 
1562 	print_otag(h, TAG_SPAN, "c", "Lb");
1563 	return 1;
1564 }
1565 
1566 static int
1567 mdoc__x_pre(MDOC_ARGS)
1568 {
1569 	const char	*cattr;
1570 	enum htmltag	 t;
1571 
1572 	t = TAG_SPAN;
1573 
1574 	switch (n->tok) {
1575 	case MDOC__A:
1576 		cattr = "RsA";
1577 		if (n->prev && MDOC__A == n->prev->tok)
1578 			if (NULL == n->next || MDOC__A != n->next->tok)
1579 				print_text(h, "and");
1580 		break;
1581 	case MDOC__B:
1582 		t = TAG_I;
1583 		cattr = "RsB";
1584 		break;
1585 	case MDOC__C:
1586 		cattr = "RsC";
1587 		break;
1588 	case MDOC__D:
1589 		cattr = "RsD";
1590 		break;
1591 	case MDOC__I:
1592 		t = TAG_I;
1593 		cattr = "RsI";
1594 		break;
1595 	case MDOC__J:
1596 		t = TAG_I;
1597 		cattr = "RsJ";
1598 		break;
1599 	case MDOC__N:
1600 		cattr = "RsN";
1601 		break;
1602 	case MDOC__O:
1603 		cattr = "RsO";
1604 		break;
1605 	case MDOC__P:
1606 		cattr = "RsP";
1607 		break;
1608 	case MDOC__Q:
1609 		cattr = "RsQ";
1610 		break;
1611 	case MDOC__R:
1612 		cattr = "RsR";
1613 		break;
1614 	case MDOC__T:
1615 		cattr = "RsT";
1616 		break;
1617 	case MDOC__U:
1618 		print_otag(h, TAG_A, "ch", "RsU", n->child->string);
1619 		return 1;
1620 	case MDOC__V:
1621 		cattr = "RsV";
1622 		break;
1623 	default:
1624 		abort();
1625 	}
1626 
1627 	print_otag(h, t, "c", cattr);
1628 	return 1;
1629 }
1630 
1631 static void
1632 mdoc__x_post(MDOC_ARGS)
1633 {
1634 
1635 	if (MDOC__A == n->tok && n->next && MDOC__A == n->next->tok)
1636 		if (NULL == n->next->next || MDOC__A != n->next->next->tok)
1637 			if (NULL == n->prev || MDOC__A != n->prev->tok)
1638 				return;
1639 
1640 	/* TODO: %U */
1641 
1642 	if (NULL == n->parent || MDOC_Rs != n->parent->tok)
1643 		return;
1644 
1645 	h->flags |= HTML_NOSPACE;
1646 	print_text(h, n->next ? "," : ".");
1647 }
1648 
1649 static int
1650 mdoc_bk_pre(MDOC_ARGS)
1651 {
1652 
1653 	switch (n->type) {
1654 	case ROFFT_BLOCK:
1655 		break;
1656 	case ROFFT_HEAD:
1657 		return 0;
1658 	case ROFFT_BODY:
1659 		if (n->parent->args != NULL || n->prev->child == NULL)
1660 			h->flags |= HTML_PREKEEP;
1661 		break;
1662 	default:
1663 		abort();
1664 	}
1665 
1666 	return 1;
1667 }
1668 
1669 static void
1670 mdoc_bk_post(MDOC_ARGS)
1671 {
1672 
1673 	if (n->type == ROFFT_BODY)
1674 		h->flags &= ~(HTML_KEEP | HTML_PREKEEP);
1675 }
1676 
1677 static int
1678 mdoc_quote_pre(MDOC_ARGS)
1679 {
1680 	if (n->type != ROFFT_BODY)
1681 		return 1;
1682 
1683 	switch (n->tok) {
1684 	case MDOC_Ao:
1685 	case MDOC_Aq:
1686 		print_text(h, n->child != NULL && n->child->next == NULL &&
1687 		    n->child->tok == MDOC_Mt ?  "<" : "\\(la");
1688 		break;
1689 	case MDOC_Bro:
1690 	case MDOC_Brq:
1691 		print_text(h, "\\(lC");
1692 		break;
1693 	case MDOC_Bo:
1694 	case MDOC_Bq:
1695 		print_text(h, "\\(lB");
1696 		break;
1697 	case MDOC_Oo:
1698 	case MDOC_Op:
1699 		print_text(h, "\\(lB");
1700 		/*
1701 		 * Give up on semantic markup for now.
1702 		 * We cannot use TAG_SPAN because .Oo may contain blocks.
1703 		 * We cannot use TAG_IDIV because we might be in a
1704 		 * phrasing context (like .Dl or .Pp); we cannot
1705 		 * close out a .Pp at this point either because
1706 		 * that would break the line.
1707 		 */
1708 		/* XXX print_otag(h, TAG_???, "c", "Op"); */
1709 		break;
1710 	case MDOC_En:
1711 		if (NULL == n->norm->Es ||
1712 		    NULL == n->norm->Es->child)
1713 			return 1;
1714 		print_text(h, n->norm->Es->child->string);
1715 		break;
1716 	case MDOC_Do:
1717 	case MDOC_Dq:
1718 	case MDOC_Qo:
1719 	case MDOC_Qq:
1720 		print_text(h, "\\(lq");
1721 		break;
1722 	case MDOC_Po:
1723 	case MDOC_Pq:
1724 		print_text(h, "(");
1725 		break;
1726 	case MDOC_Ql:
1727 		print_text(h, "\\(oq");
1728 		h->flags |= HTML_NOSPACE;
1729 		print_otag(h, TAG_CODE, "c", "Li");
1730 		break;
1731 	case MDOC_So:
1732 	case MDOC_Sq:
1733 		print_text(h, "\\(oq");
1734 		break;
1735 	default:
1736 		abort();
1737 	}
1738 
1739 	h->flags |= HTML_NOSPACE;
1740 	return 1;
1741 }
1742 
1743 static void
1744 mdoc_quote_post(MDOC_ARGS)
1745 {
1746 
1747 	if (n->type != ROFFT_BODY && n->type != ROFFT_ELEM)
1748 		return;
1749 
1750 	h->flags |= HTML_NOSPACE;
1751 
1752 	switch (n->tok) {
1753 	case MDOC_Ao:
1754 	case MDOC_Aq:
1755 		print_text(h, n->child != NULL && n->child->next == NULL &&
1756 		    n->child->tok == MDOC_Mt ?  ">" : "\\(ra");
1757 		break;
1758 	case MDOC_Bro:
1759 	case MDOC_Brq:
1760 		print_text(h, "\\(rC");
1761 		break;
1762 	case MDOC_Oo:
1763 	case MDOC_Op:
1764 	case MDOC_Bo:
1765 	case MDOC_Bq:
1766 		print_text(h, "\\(rB");
1767 		break;
1768 	case MDOC_En:
1769 		if (n->norm->Es == NULL ||
1770 		    n->norm->Es->child == NULL ||
1771 		    n->norm->Es->child->next == NULL)
1772 			h->flags &= ~HTML_NOSPACE;
1773 		else
1774 			print_text(h, n->norm->Es->child->next->string);
1775 		break;
1776 	case MDOC_Qo:
1777 	case MDOC_Qq:
1778 	case MDOC_Do:
1779 	case MDOC_Dq:
1780 		print_text(h, "\\(rq");
1781 		break;
1782 	case MDOC_Po:
1783 	case MDOC_Pq:
1784 		print_text(h, ")");
1785 		break;
1786 	case MDOC_Ql:
1787 	case MDOC_So:
1788 	case MDOC_Sq:
1789 		print_text(h, "\\(cq");
1790 		break;
1791 	default:
1792 		abort();
1793 	}
1794 }
1795 
1796 static int
1797 mdoc_eo_pre(MDOC_ARGS)
1798 {
1799 
1800 	if (n->type != ROFFT_BODY)
1801 		return 1;
1802 
1803 	if (n->end == ENDBODY_NOT &&
1804 	    n->parent->head->child == NULL &&
1805 	    n->child != NULL &&
1806 	    n->child->end != ENDBODY_NOT)
1807 		print_text(h, "\\&");
1808 	else if (n->end != ENDBODY_NOT ? n->child != NULL :
1809 	    n->parent->head->child != NULL && (n->child != NULL ||
1810 	    (n->parent->tail != NULL && n->parent->tail->child != NULL)))
1811 		h->flags |= HTML_NOSPACE;
1812 	return 1;
1813 }
1814 
1815 static void
1816 mdoc_eo_post(MDOC_ARGS)
1817 {
1818 	int	 body, tail;
1819 
1820 	if (n->type != ROFFT_BODY)
1821 		return;
1822 
1823 	if (n->end != ENDBODY_NOT) {
1824 		h->flags &= ~HTML_NOSPACE;
1825 		return;
1826 	}
1827 
1828 	body = n->child != NULL || n->parent->head->child != NULL;
1829 	tail = n->parent->tail != NULL && n->parent->tail->child != NULL;
1830 
1831 	if (body && tail)
1832 		h->flags |= HTML_NOSPACE;
1833 	else if ( ! tail)
1834 		h->flags &= ~HTML_NOSPACE;
1835 }
1836 
1837 static int
1838 mdoc_abort_pre(MDOC_ARGS)
1839 {
1840 	abort();
1841 }
1842