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1 /* $Id: mdoc_markdown.c,v 1.26 2018/08/17 20:33:38 schwarze Exp $ */
2 /*
3 * Copyright (c) 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17 #include <sys/types.h>
18
19 #include <assert.h>
20 #include <ctype.h>
21 #include <stdio.h>
22 #include <string.h>
23
24 #include "mandoc_aux.h"
25 #include "mandoc.h"
26 #include "roff.h"
27 #include "mdoc.h"
28 #include "main.h"
29
30 struct md_act {
31 int (*cond)(struct roff_node *n);
32 int (*pre)(struct roff_node *n);
33 void (*post)(struct roff_node *n);
34 const char *prefix; /* pre-node string constant */
35 const char *suffix; /* post-node string constant */
36 };
37
38 static void md_nodelist(struct roff_node *);
39 static void md_node(struct roff_node *);
40 static const char *md_stack(char c);
41 static void md_preword(void);
42 static void md_rawword(const char *);
43 static void md_word(const char *);
44 static void md_named(const char *);
45 static void md_char(unsigned char);
46 static void md_uri(const char *);
47
48 static int md_cond_head(struct roff_node *);
49 static int md_cond_body(struct roff_node *);
50
51 static int md_pre_raw(struct roff_node *);
52 static int md_pre_word(struct roff_node *);
53 static int md_pre_skip(struct roff_node *);
54 static void md_pre_syn(struct roff_node *);
55 static int md_pre_An(struct roff_node *);
56 static int md_pre_Ap(struct roff_node *);
57 static int md_pre_Bd(struct roff_node *);
58 static int md_pre_Bk(struct roff_node *);
59 static int md_pre_Bl(struct roff_node *);
60 static int md_pre_D1(struct roff_node *);
61 static int md_pre_Dl(struct roff_node *);
62 static int md_pre_En(struct roff_node *);
63 static int md_pre_Eo(struct roff_node *);
64 static int md_pre_Fa(struct roff_node *);
65 static int md_pre_Fd(struct roff_node *);
66 static int md_pre_Fn(struct roff_node *);
67 static int md_pre_Fo(struct roff_node *);
68 static int md_pre_In(struct roff_node *);
69 static int md_pre_It(struct roff_node *);
70 static int md_pre_Lk(struct roff_node *);
71 static int md_pre_Mt(struct roff_node *);
72 static int md_pre_Nd(struct roff_node *);
73 static int md_pre_Nm(struct roff_node *);
74 static int md_pre_No(struct roff_node *);
75 static int md_pre_Ns(struct roff_node *);
76 static int md_pre_Pp(struct roff_node *);
77 static int md_pre_Rs(struct roff_node *);
78 static int md_pre_Sh(struct roff_node *);
79 static int md_pre_Sm(struct roff_node *);
80 static int md_pre_Vt(struct roff_node *);
81 static int md_pre_Xr(struct roff_node *);
82 static int md_pre__T(struct roff_node *);
83 static int md_pre_br(struct roff_node *);
84
85 static void md_post_raw(struct roff_node *);
86 static void md_post_word(struct roff_node *);
87 static void md_post_pc(struct roff_node *);
88 static void md_post_Bk(struct roff_node *);
89 static void md_post_Bl(struct roff_node *);
90 static void md_post_D1(struct roff_node *);
91 static void md_post_En(struct roff_node *);
92 static void md_post_Eo(struct roff_node *);
93 static void md_post_Fa(struct roff_node *);
94 static void md_post_Fd(struct roff_node *);
95 static void md_post_Fl(struct roff_node *);
96 static void md_post_Fn(struct roff_node *);
97 static void md_post_Fo(struct roff_node *);
98 static void md_post_In(struct roff_node *);
99 static void md_post_It(struct roff_node *);
100 static void md_post_Lb(struct roff_node *);
101 static void md_post_Nm(struct roff_node *);
102 static void md_post_Pf(struct roff_node *);
103 static void md_post_Vt(struct roff_node *);
104 static void md_post__T(struct roff_node *);
105
106 static const struct md_act md_acts[MDOC_MAX - MDOC_Dd] = {
107 { NULL, NULL, NULL, NULL, NULL }, /* Dd */
108 { NULL, NULL, NULL, NULL, NULL }, /* Dt */
109 { NULL, NULL, NULL, NULL, NULL }, /* Os */
110 { NULL, md_pre_Sh, NULL, NULL, NULL }, /* Sh */
111 { NULL, md_pre_Sh, NULL, NULL, NULL }, /* Ss */
112 { NULL, md_pre_Pp, NULL, NULL, NULL }, /* Pp */
113 { md_cond_body, md_pre_D1, md_post_D1, NULL, NULL }, /* D1 */
114 { md_cond_body, md_pre_Dl, md_post_D1, NULL, NULL }, /* Dl */
115 { md_cond_body, md_pre_Bd, md_post_D1, NULL, NULL }, /* Bd */
116 { NULL, NULL, NULL, NULL, NULL }, /* Ed */
117 { md_cond_body, md_pre_Bl, md_post_Bl, NULL, NULL }, /* Bl */
118 { NULL, NULL, NULL, NULL, NULL }, /* El */
119 { NULL, md_pre_It, md_post_It, NULL, NULL }, /* It */
120 { NULL, md_pre_raw, md_post_raw, "*", "*" }, /* Ad */
121 { NULL, md_pre_An, NULL, NULL, NULL }, /* An */
122 { NULL, md_pre_Ap, NULL, NULL, NULL }, /* Ap */
123 { NULL, md_pre_raw, md_post_raw, "*", "*" }, /* Ar */
124 { NULL, md_pre_raw, md_post_raw, "**", "**" }, /* Cd */
125 { NULL, md_pre_raw, md_post_raw, "**", "**" }, /* Cm */
126 { NULL, md_pre_raw, md_post_raw, "`", "`" }, /* Dv */
127 { NULL, md_pre_raw, md_post_raw, "`", "`" }, /* Er */
128 { NULL, md_pre_raw, md_post_raw, "`", "`" }, /* Ev */
129 { NULL, NULL, NULL, NULL, NULL }, /* Ex */
130 { NULL, md_pre_Fa, md_post_Fa, NULL, NULL }, /* Fa */
131 { NULL, md_pre_Fd, md_post_Fd, "**", "**" }, /* Fd */
132 { NULL, md_pre_raw, md_post_Fl, "**-", "**" }, /* Fl */
133 { NULL, md_pre_Fn, md_post_Fn, NULL, NULL }, /* Fn */
134 { NULL, md_pre_Fd, md_post_raw, "*", "*" }, /* Ft */
135 { NULL, md_pre_raw, md_post_raw, "**", "**" }, /* Ic */
136 { NULL, md_pre_In, md_post_In, NULL, NULL }, /* In */
137 { NULL, md_pre_raw, md_post_raw, "`", "`" }, /* Li */
138 { md_cond_head, md_pre_Nd, NULL, NULL, NULL }, /* Nd */
139 { NULL, md_pre_Nm, md_post_Nm, "**", "**" }, /* Nm */
140 { md_cond_body, md_pre_word, md_post_word, "[", "]" }, /* Op */
141 { NULL, md_pre_Fd, md_post_raw, "*", "*" }, /* Ot */
142 { NULL, md_pre_raw, md_post_raw, "*", "*" }, /* Pa */
143 { NULL, NULL, NULL, NULL, NULL }, /* Rv */
144 { NULL, NULL, NULL, NULL, NULL }, /* St */
145 { NULL, md_pre_raw, md_post_raw, "*", "*" }, /* Va */
146 { NULL, md_pre_Vt, md_post_Vt, "*", "*" }, /* Vt */
147 { NULL, md_pre_Xr, NULL, NULL, NULL }, /* Xr */
148 { NULL, NULL, md_post_pc, NULL, NULL }, /* %A */
149 { NULL, md_pre_raw, md_post_pc, "*", "*" }, /* %B */
150 { NULL, NULL, md_post_pc, NULL, NULL }, /* %D */
151 { NULL, md_pre_raw, md_post_pc, "*", "*" }, /* %I */
152 { NULL, md_pre_raw, md_post_pc, "*", "*" }, /* %J */
153 { NULL, NULL, md_post_pc, NULL, NULL }, /* %N */
154 { NULL, NULL, md_post_pc, NULL, NULL }, /* %O */
155 { NULL, NULL, md_post_pc, NULL, NULL }, /* %P */
156 { NULL, NULL, md_post_pc, NULL, NULL }, /* %R */
157 { NULL, md_pre__T, md_post__T, NULL, NULL }, /* %T */
158 { NULL, NULL, md_post_pc, NULL, NULL }, /* %V */
159 { NULL, NULL, NULL, NULL, NULL }, /* Ac */
160 { md_cond_body, md_pre_word, md_post_word, "<", ">" }, /* Ao */
161 { md_cond_body, md_pre_word, md_post_word, "<", ">" }, /* Aq */
162 { NULL, NULL, NULL, NULL, NULL }, /* At */
163 { NULL, NULL, NULL, NULL, NULL }, /* Bc */
164 { NULL, NULL, NULL, NULL, NULL }, /* Bf XXX not implemented */
165 { md_cond_body, md_pre_word, md_post_word, "[", "]" }, /* Bo */
166 { md_cond_body, md_pre_word, md_post_word, "[", "]" }, /* Bq */
167 { NULL, NULL, NULL, NULL, NULL }, /* Bsx */
168 { NULL, NULL, NULL, NULL, NULL }, /* Bx */
169 { NULL, NULL, NULL, NULL, NULL }, /* Db */
170 { NULL, NULL, NULL, NULL, NULL }, /* Dc */
171 { md_cond_body, md_pre_word, md_post_word, "\"", "\"" }, /* Do */
172 { md_cond_body, md_pre_word, md_post_word, "\"", "\"" }, /* Dq */
173 { NULL, NULL, NULL, NULL, NULL }, /* Ec */
174 { NULL, NULL, NULL, NULL, NULL }, /* Ef */
175 { NULL, md_pre_raw, md_post_raw, "*", "*" }, /* Em */
176 { md_cond_body, md_pre_Eo, md_post_Eo, NULL, NULL }, /* Eo */
177 { NULL, NULL, NULL, NULL, NULL }, /* Fx */
178 { NULL, md_pre_raw, md_post_raw, "**", "**" }, /* Ms */
179 { NULL, md_pre_No, NULL, NULL, NULL }, /* No */
180 { NULL, md_pre_Ns, NULL, NULL, NULL }, /* Ns */
181 { NULL, NULL, NULL, NULL, NULL }, /* Nx */
182 { NULL, NULL, NULL, NULL, NULL }, /* Ox */
183 { NULL, NULL, NULL, NULL, NULL }, /* Pc */
184 { NULL, NULL, md_post_Pf, NULL, NULL }, /* Pf */
185 { md_cond_body, md_pre_word, md_post_word, "(", ")" }, /* Po */
186 { md_cond_body, md_pre_word, md_post_word, "(", ")" }, /* Pq */
187 { NULL, NULL, NULL, NULL, NULL }, /* Qc */
188 { md_cond_body, md_pre_raw, md_post_raw, "'`", "`'" }, /* Ql */
189 { md_cond_body, md_pre_word, md_post_word, "\"", "\"" }, /* Qo */
190 { md_cond_body, md_pre_word, md_post_word, "\"", "\"" }, /* Qq */
191 { NULL, NULL, NULL, NULL, NULL }, /* Re */
192 { md_cond_body, md_pre_Rs, NULL, NULL, NULL }, /* Rs */
193 { NULL, NULL, NULL, NULL, NULL }, /* Sc */
194 { md_cond_body, md_pre_word, md_post_word, "'", "'" }, /* So */
195 { md_cond_body, md_pre_word, md_post_word, "'", "'" }, /* Sq */
196 { NULL, md_pre_Sm, NULL, NULL, NULL }, /* Sm */
197 { NULL, md_pre_raw, md_post_raw, "*", "*" }, /* Sx */
198 { NULL, md_pre_raw, md_post_raw, "**", "**" }, /* Sy */
199 { NULL, md_pre_raw, md_post_raw, "`", "`" }, /* Tn */
200 { NULL, NULL, NULL, NULL, NULL }, /* Ux */
201 { NULL, NULL, NULL, NULL, NULL }, /* Xc */
202 { NULL, NULL, NULL, NULL, NULL }, /* Xo */
203 { NULL, md_pre_Fo, md_post_Fo, "**", "**" }, /* Fo */
204 { NULL, NULL, NULL, NULL, NULL }, /* Fc */
205 { md_cond_body, md_pre_word, md_post_word, "[", "]" }, /* Oo */
206 { NULL, NULL, NULL, NULL, NULL }, /* Oc */
207 { NULL, md_pre_Bk, md_post_Bk, NULL, NULL }, /* Bk */
208 { NULL, NULL, NULL, NULL, NULL }, /* Ek */
209 { NULL, NULL, NULL, NULL, NULL }, /* Bt */
210 { NULL, NULL, NULL, NULL, NULL }, /* Hf */
211 { NULL, md_pre_raw, md_post_raw, "*", "*" }, /* Fr */
212 { NULL, NULL, NULL, NULL, NULL }, /* Ud */
213 { NULL, NULL, md_post_Lb, NULL, NULL }, /* Lb */
214 { NULL, md_pre_Pp, NULL, NULL, NULL }, /* Lp */
215 { NULL, md_pre_Lk, NULL, NULL, NULL }, /* Lk */
216 { NULL, md_pre_Mt, NULL, NULL, NULL }, /* Mt */
217 { md_cond_body, md_pre_word, md_post_word, "{", "}" }, /* Brq */
218 { md_cond_body, md_pre_word, md_post_word, "{", "}" }, /* Bro */
219 { NULL, NULL, NULL, NULL, NULL }, /* Brc */
220 { NULL, NULL, md_post_pc, NULL, NULL }, /* %C */
221 { NULL, md_pre_skip, NULL, NULL, NULL }, /* Es */
222 { md_cond_body, md_pre_En, md_post_En, NULL, NULL }, /* En */
223 { NULL, NULL, NULL, NULL, NULL }, /* Dx */
224 { NULL, NULL, md_post_pc, NULL, NULL }, /* %Q */
225 { NULL, md_pre_Lk, md_post_pc, NULL, NULL }, /* %U */
226 { NULL, NULL, NULL, NULL, NULL }, /* Ta */
227 };
228 static const struct md_act *md_act(enum roff_tok);
229
230 static int outflags;
231 #define MD_spc (1 << 0) /* Blank character before next word. */
232 #define MD_spc_force (1 << 1) /* Even before trailing punctuation. */
233 #define MD_nonl (1 << 2) /* Prevent linebreak in markdown code. */
234 #define MD_nl (1 << 3) /* Break markdown code line. */
235 #define MD_br (1 << 4) /* Insert an output line break. */
236 #define MD_sp (1 << 5) /* Insert a paragraph break. */
237 #define MD_Sm (1 << 6) /* Horizontal spacing mode. */
238 #define MD_Bk (1 << 7) /* Word keep mode. */
239 #define MD_An_split (1 << 8) /* Author mode is "split". */
240 #define MD_An_nosplit (1 << 9) /* Author mode is "nosplit". */
241
242 static int escflags; /* Escape in generated markdown code: */
243 #define ESC_BOL (1 << 0) /* "#*+-" near the beginning of a line. */
244 #define ESC_NUM (1 << 1) /* "." after a leading number. */
245 #define ESC_HYP (1 << 2) /* "(" immediately after "]". */
246 #define ESC_SQU (1 << 4) /* "]" when "[" is open. */
247 #define ESC_FON (1 << 5) /* "*" immediately after unrelated "*". */
248 #define ESC_EOL (1 << 6) /* " " at the and of a line. */
249
250 static int code_blocks, quote_blocks, list_blocks;
251 static int outcount;
252
253
254 static const struct md_act *
255 md_act(enum roff_tok tok)
256 {
257 assert(tok >= MDOC_Dd && tok <= MDOC_MAX);
258 return md_acts + (tok - MDOC_Dd);
259 }
260
261 void
262 markdown_mdoc(void *arg, const struct roff_man *mdoc)
263 {
264 outflags = MD_Sm;
265 md_word(mdoc->meta.title);
266 if (mdoc->meta.msec != NULL) {
267 outflags &= ~MD_spc;
268 md_word("(");
269 md_word(mdoc->meta.msec);
270 md_word(")");
271 }
272 md_word("-");
273 md_word(mdoc->meta.vol);
274 if (mdoc->meta.arch != NULL) {
275 md_word("(");
276 md_word(mdoc->meta.arch);
277 md_word(")");
278 }
279 outflags |= MD_sp;
280
281 md_nodelist(mdoc->first->child);
282
283 outflags |= MD_sp;
284 md_word(mdoc->meta.os);
285 md_word("-");
286 md_word(mdoc->meta.date);
287 putchar('\n');
288 }
289
290 static void
291 md_nodelist(struct roff_node *n)
292 {
293 while (n != NULL) {
294 md_node(n);
295 n = n->next;
296 }
297 }
298
299 static void
300 md_node(struct roff_node *n)
301 {
302 const struct md_act *act;
303 int cond, process_children;
304
305 if (n->type == ROFFT_COMMENT || n->flags & NODE_NOPRT)
306 return;
307
308 if (outflags & MD_nonl)
309 outflags &= ~(MD_nl | MD_sp);
310 else if (outflags & MD_spc && n->flags & NODE_LINE)
311 outflags |= MD_nl;
312
313 act = NULL;
314 cond = 0;
315 process_children = 1;
316 n->flags &= ~NODE_ENDED;
317
318 if (n->type == ROFFT_TEXT) {
319 if (n->flags & NODE_DELIMC)
320 outflags &= ~(MD_spc | MD_spc_force);
321 else if (outflags & MD_Sm)
322 outflags |= MD_spc_force;
323 md_word(n->string);
324 if (n->flags & NODE_DELIMO)
325 outflags &= ~(MD_spc | MD_spc_force);
326 else if (outflags & MD_Sm)
327 outflags |= MD_spc;
328 } else if (n->tok < ROFF_MAX) {
329 switch (n->tok) {
330 case ROFF_br:
331 process_children = md_pre_br(n);
332 break;
333 case ROFF_sp:
334 process_children = md_pre_Pp(n);
335 break;
336 default:
337 process_children = 0;
338 break;
339 }
340 } else {
341 act = md_act(n->tok);
342 cond = act->cond == NULL || (*act->cond)(n);
343 if (cond && act->pre != NULL &&
344 (n->end == ENDBODY_NOT || n->child != NULL))
345 process_children = (*act->pre)(n);
346 }
347
348 if (process_children && n->child != NULL)
349 md_nodelist(n->child);
350
351 if (n->flags & NODE_ENDED)
352 return;
353
354 if (cond && act->post != NULL)
355 (*act->post)(n);
356
357 if (n->end != ENDBODY_NOT)
358 n->body->flags |= NODE_ENDED;
359 }
360
361 static const char *
362 md_stack(char c)
363 {
364 static char *stack;
365 static size_t sz;
366 static size_t cur;
367
368 switch (c) {
369 case '\0':
370 break;
371 case (char)-1:
372 assert(cur);
373 stack[--cur] = '\0';
374 break;
375 default:
376 if (cur + 1 >= sz) {
377 sz += 8;
378 stack = mandoc_realloc(stack, sz);
379 }
380 stack[cur] = c;
381 stack[++cur] = '\0';
382 break;
383 }
384 return stack == NULL ? "" : stack;
385 }
386
387 /*
388 * Handle vertical and horizontal spacing.
389 */
390 static void
391 md_preword(void)
392 {
393 const char *cp;
394
395 /*
396 * If a list block is nested inside a code block or a blockquote,
397 * blank lines for paragraph breaks no longer work; instead,
398 * they terminate the list. Work around this markdown issue
399 * by using mere line breaks instead.
400 */
401
402 if (list_blocks && outflags & MD_sp) {
403 outflags &= ~MD_sp;
404 outflags |= MD_br;
405 }
406
407 /*
408 * End the old line if requested.
409 * Escape whitespace at the end of the markdown line
410 * such that it won't look like an output line break.
411 */
412
413 if (outflags & MD_sp)
414 putchar('\n');
415 else if (outflags & MD_br) {
416 putchar(' ');
417 putchar(' ');
418 } else if (outflags & MD_nl && escflags & ESC_EOL)
419 md_named("zwnj");
420
421 /* Start a new line if necessary. */
422
423 if (outflags & (MD_nl | MD_br | MD_sp)) {
424 putchar('\n');
425 for (cp = md_stack('\0'); *cp != '\0'; cp++) {
426 putchar(*cp);
427 if (*cp == '>')
428 putchar(' ');
429 }
430 outflags &= ~(MD_nl | MD_br | MD_sp);
431 escflags = ESC_BOL;
432 outcount = 0;
433
434 /* Handle horizontal spacing. */
435
436 } else if (outflags & MD_spc) {
437 if (outflags & MD_Bk)
438 fputs("&nbsp;", stdout);
439 else
440 putchar(' ');
441 escflags &= ~ESC_FON;
442 outcount++;
443 }
444
445 outflags &= ~(MD_spc_force | MD_nonl);
446 if (outflags & MD_Sm)
447 outflags |= MD_spc;
448 else
449 outflags &= ~MD_spc;
450 }
451
452 /*
453 * Print markdown syntax elements.
454 * Can also be used for constant strings when neither escaping
455 * nor delimiter handling is required.
456 */
457 static void
458 md_rawword(const char *s)
459 {
460 md_preword();
461
462 if (*s == '\0')
463 return;
464
465 if (escflags & ESC_FON) {
466 escflags &= ~ESC_FON;
467 if (*s == '*' && !code_blocks)
468 fputs("&zwnj;", stdout);
469 }
470
471 while (*s != '\0') {
472 switch(*s) {
473 case '*':
474 if (s[1] == '\0')
475 escflags |= ESC_FON;
476 break;
477 case '[':
478 escflags |= ESC_SQU;
479 break;
480 case ']':
481 escflags |= ESC_HYP;
482 escflags &= ~ESC_SQU;
483 break;
484 default:
485 break;
486 }
487 md_char(*s++);
488 }
489 if (s[-1] == ' ')
490 escflags |= ESC_EOL;
491 else
492 escflags &= ~ESC_EOL;
493 }
494
495 /*
496 * Print text and mdoc(7) syntax elements.
497 */
498 static void
499 md_word(const char *s)
500 {
501 const char *seq, *prevfont, *currfont, *nextfont;
502 char c;
503 int bs, sz, uc, breakline;
504
505 /* No spacing before closing delimiters. */
506 if (s[0] != '\0' && s[1] == '\0' &&
507 strchr("!),.:;?]", s[0]) != NULL &&
508 (outflags & MD_spc_force) == 0)
509 outflags &= ~MD_spc;
510
511 md_preword();
512
513 if (*s == '\0')
514 return;
515
516 /* No spacing after opening delimiters. */
517 if ((s[0] == '(' || s[0] == '[') && s[1] == '\0')
518 outflags &= ~MD_spc;
519
520 breakline = 0;
521 prevfont = currfont = "";
522 while ((c = *s++) != '\0') {
523 bs = 0;
524 switch(c) {
525 case ASCII_NBRSP:
526 if (code_blocks)
527 c = ' ';
528 else {
529 md_named("nbsp");
530 c = '\0';
531 }
532 break;
533 case ASCII_HYPH:
534 bs = escflags & ESC_BOL && !code_blocks;
535 c = '-';
536 break;
537 case ASCII_BREAK:
538 continue;
539 case '#':
540 case '+':
541 case '-':
542 bs = escflags & ESC_BOL && !code_blocks;
543 break;
544 case '(':
545 bs = escflags & ESC_HYP && !code_blocks;
546 break;
547 case ')':
548 bs = escflags & ESC_NUM && !code_blocks;
549 break;
550 case '*':
551 case '[':
552 case '_':
553 case '`':
554 bs = !code_blocks;
555 break;
556 case '.':
557 bs = escflags & ESC_NUM && !code_blocks;
558 break;
559 case '<':
560 if (code_blocks == 0) {
561 md_named("lt");
562 c = '\0';
563 }
564 break;
565 case '=':
566 if (escflags & ESC_BOL && !code_blocks) {
567 md_named("equals");
568 c = '\0';
569 }
570 break;
571 case '>':
572 if (code_blocks == 0) {
573 md_named("gt");
574 c = '\0';
575 }
576 break;
577 case '\\':
578 uc = 0;
579 nextfont = NULL;
580 switch (mandoc_escape(&s, &seq, &sz)) {
581 case ESCAPE_UNICODE:
582 uc = mchars_num2uc(seq + 1, sz - 1);
583 break;
584 case ESCAPE_NUMBERED:
585 uc = mchars_num2char(seq, sz);
586 break;
587 case ESCAPE_SPECIAL:
588 uc = mchars_spec2cp(seq, sz);
589 break;
590 case ESCAPE_DEVICE:
591 md_rawword("markdown");
592 continue;
593 case ESCAPE_FONTBOLD:
594 nextfont = "**";
595 break;
596 case ESCAPE_FONTITALIC:
597 nextfont = "*";
598 break;
599 case ESCAPE_FONTBI:
600 nextfont = "***";
601 break;
602 case ESCAPE_FONT:
603 case ESCAPE_FONTROMAN:
604 nextfont = "";
605 break;
606 case ESCAPE_FONTPREV:
607 nextfont = prevfont;
608 break;
609 case ESCAPE_BREAK:
610 breakline = 1;
611 break;
612 case ESCAPE_NOSPACE:
613 case ESCAPE_SKIPCHAR:
614 case ESCAPE_OVERSTRIKE:
615 /* XXX not implemented */
616 /* FALLTHROUGH */
617 case ESCAPE_ERROR:
618 default:
619 break;
620 }
621 if (nextfont != NULL && !code_blocks) {
622 if (*currfont != '\0') {
623 outflags &= ~MD_spc;
624 md_rawword(currfont);
625 }
626 prevfont = currfont;
627 currfont = nextfont;
628 if (*currfont != '\0') {
629 outflags &= ~MD_spc;
630 md_rawword(currfont);
631 }
632 }
633 if (uc) {
634 if ((uc < 0x20 && uc != 0x09) ||
635 (uc > 0x7E && uc < 0xA0))
636 uc = 0xFFFD;
637 if (code_blocks) {
638 seq = mchars_uc2str(uc);
639 fputs(seq, stdout);
640 outcount += strlen(seq);
641 } else {
642 printf("&#%d;", uc);
643 outcount++;
644 }
645 escflags &= ~ESC_FON;
646 }
647 c = '\0';
648 break;
649 case ']':
650 bs = escflags & ESC_SQU && !code_blocks;
651 escflags |= ESC_HYP;
652 break;
653 default:
654 break;
655 }
656 if (bs)
657 putchar('\\');
658 md_char(c);
659 if (breakline &&
660 (*s == '\0' || *s == ' ' || *s == ASCII_NBRSP)) {
661 printf(" \n");
662 breakline = 0;
663 while (*s == ' ' || *s == ASCII_NBRSP)
664 s++;
665 }
666 }
667 if (*currfont != '\0') {
668 outflags &= ~MD_spc;
669 md_rawword(currfont);
670 } else if (s[-2] == ' ')
671 escflags |= ESC_EOL;
672 else
673 escflags &= ~ESC_EOL;
674 }
675
676 /*
677 * Print a single HTML named character reference.
678 */
679 static void
680 md_named(const char *s)
681 {
682 printf("&%s;", s);
683 escflags &= ~(ESC_FON | ESC_EOL);
684 outcount++;
685 }
686
687 /*
688 * Print a single raw character and maintain certain escape flags.
689 */
690 static void
691 md_char(unsigned char c)
692 {
693 if (c != '\0') {
694 putchar(c);
695 if (c == '*')
696 escflags |= ESC_FON;
697 else
698 escflags &= ~ESC_FON;
699 outcount++;
700 }
701 if (c != ']')
702 escflags &= ~ESC_HYP;
703 if (c == ' ' || c == '\t' || c == '>')
704 return;
705 if (isdigit(c) == 0)
706 escflags &= ~ESC_NUM;
707 else if (escflags & ESC_BOL)
708 escflags |= ESC_NUM;
709 escflags &= ~ESC_BOL;
710 }
711
712 static int
713 md_cond_head(struct roff_node *n)
714 {
715 return n->type == ROFFT_HEAD;
716 }
717
718 static int
719 md_cond_body(struct roff_node *n)
720 {
721 return n->type == ROFFT_BODY;
722 }
723
724 static int
725 md_pre_raw(struct roff_node *n)
726 {
727 const char *prefix;
728
729 if ((prefix = md_act(n->tok)->prefix) != NULL) {
730 md_rawword(prefix);
731 outflags &= ~MD_spc;
732 if (*prefix == '`')
733 code_blocks++;
734 }
735 return 1;
736 }
737
738 static void
739 md_post_raw(struct roff_node *n)
740 {
741 const char *suffix;
742
743 if ((suffix = md_act(n->tok)->suffix) != NULL) {
744 outflags &= ~(MD_spc | MD_nl);
745 md_rawword(suffix);
746 if (*suffix == '`')
747 code_blocks--;
748 }
749 }
750
751 static int
752 md_pre_word(struct roff_node *n)
753 {
754 const char *prefix;
755
756 if ((prefix = md_act(n->tok)->prefix) != NULL) {
757 md_word(prefix);
758 outflags &= ~MD_spc;
759 }
760 return 1;
761 }
762
763 static void
764 md_post_word(struct roff_node *n)
765 {
766 const char *suffix;
767
768 if ((suffix = md_act(n->tok)->suffix) != NULL) {
769 outflags &= ~(MD_spc | MD_nl);
770 md_word(suffix);
771 }
772 }
773
774 static void
775 md_post_pc(struct roff_node *n)
776 {
777 md_post_raw(n);
778 if (n->parent->tok != MDOC_Rs)
779 return;
780 if (n->next != NULL) {
781 md_word(",");
782 if (n->prev != NULL &&
783 n->prev->tok == n->tok &&
784 n->next->tok == n->tok)
785 md_word("and");
786 } else {
787 md_word(".");
788 outflags |= MD_nl;
789 }
790 }
791
792 static int
793 md_pre_skip(struct roff_node *n)
794 {
795 return 0;
796 }
797
798 static void
799 md_pre_syn(struct roff_node *n)
800 {
801 if (n->prev == NULL || ! (n->flags & NODE_SYNPRETTY))
802 return;
803
804 if (n->prev->tok == n->tok &&
805 n->tok != MDOC_Ft &&
806 n->tok != MDOC_Fo &&
807 n->tok != MDOC_Fn) {
808 outflags |= MD_br;
809 return;
810 }
811
812 switch (n->prev->tok) {
813 case MDOC_Fd:
814 case MDOC_Fn:
815 case MDOC_Fo:
816 case MDOC_In:
817 case MDOC_Vt:
818 outflags |= MD_sp;
819 break;
820 case MDOC_Ft:
821 if (n->tok != MDOC_Fn && n->tok != MDOC_Fo) {
822 outflags |= MD_sp;
823 break;
824 }
825 /* FALLTHROUGH */
826 default:
827 outflags |= MD_br;
828 break;
829 }
830 }
831
832 static int
833 md_pre_An(struct roff_node *n)
834 {
835 switch (n->norm->An.auth) {
836 case AUTH_split:
837 outflags &= ~MD_An_nosplit;
838 outflags |= MD_An_split;
839 return 0;
840 case AUTH_nosplit:
841 outflags &= ~MD_An_split;
842 outflags |= MD_An_nosplit;
843 return 0;
844 default:
845 if (outflags & MD_An_split)
846 outflags |= MD_br;
847 else if (n->sec == SEC_AUTHORS &&
848 ! (outflags & MD_An_nosplit))
849 outflags |= MD_An_split;
850 return 1;
851 }
852 }
853
854 static int
855 md_pre_Ap(struct roff_node *n)
856 {
857 outflags &= ~MD_spc;
858 md_word("'");
859 outflags &= ~MD_spc;
860 return 0;
861 }
862
863 static int
864 md_pre_Bd(struct roff_node *n)
865 {
866 switch (n->norm->Bd.type) {
867 case DISP_unfilled:
868 case DISP_literal:
869 return md_pre_Dl(n);
870 default:
871 return md_pre_D1(n);
872 }
873 }
874
875 static int
876 md_pre_Bk(struct roff_node *n)
877 {
878 switch (n->type) {
879 case ROFFT_BLOCK:
880 return 1;
881 case ROFFT_BODY:
882 outflags |= MD_Bk;
883 return 1;
884 default:
885 return 0;
886 }
887 }
888
889 static void
890 md_post_Bk(struct roff_node *n)
891 {
892 if (n->type == ROFFT_BODY)
893 outflags &= ~MD_Bk;
894 }
895
896 static int
897 md_pre_Bl(struct roff_node *n)
898 {
899 n->norm->Bl.count = 0;
900 if (n->norm->Bl.type == LIST_column)
901 md_pre_Dl(n);
902 outflags |= MD_sp;
903 return 1;
904 }
905
906 static void
907 md_post_Bl(struct roff_node *n)
908 {
909 n->norm->Bl.count = 0;
910 if (n->norm->Bl.type == LIST_column)
911 md_post_D1(n);
912 outflags |= MD_sp;
913 }
914
915 static int
916 md_pre_D1(struct roff_node *n)
917 {
918 /*
919 * Markdown blockquote syntax does not work inside code blocks.
920 * The best we can do is fall back to another nested code block.
921 */
922 if (code_blocks) {
923 md_stack('\t');
924 code_blocks++;
925 } else {
926 md_stack('>');
927 quote_blocks++;
928 }
929 outflags |= MD_sp;
930 return 1;
931 }
932
933 static void
934 md_post_D1(struct roff_node *n)
935 {
936 md_stack((char)-1);
937 if (code_blocks)
938 code_blocks--;
939 else
940 quote_blocks--;
941 outflags |= MD_sp;
942 }
943
944 static int
945 md_pre_Dl(struct roff_node *n)
946 {
947 /*
948 * Markdown code block syntax does not work inside blockquotes.
949 * The best we can do is fall back to another nested blockquote.
950 */
951 if (quote_blocks) {
952 md_stack('>');
953 quote_blocks++;
954 } else {
955 md_stack('\t');
956 code_blocks++;
957 }
958 outflags |= MD_sp;
959 return 1;
960 }
961
962 static int
963 md_pre_En(struct roff_node *n)
964 {
965 if (n->norm->Es == NULL ||
966 n->norm->Es->child == NULL)
967 return 1;
968
969 md_word(n->norm->Es->child->string);
970 outflags &= ~MD_spc;
971 return 1;
972 }
973
974 static void
975 md_post_En(struct roff_node *n)
976 {
977 if (n->norm->Es == NULL ||
978 n->norm->Es->child == NULL ||
979 n->norm->Es->child->next == NULL)
980 return;
981
982 outflags &= ~MD_spc;
983 md_word(n->norm->Es->child->next->string);
984 }
985
986 static int
987 md_pre_Eo(struct roff_node *n)
988 {
989 if (n->end == ENDBODY_NOT &&
990 n->parent->head->child == NULL &&
991 n->child != NULL &&
992 n->child->end != ENDBODY_NOT)
993 md_preword();
994 else if (n->end != ENDBODY_NOT ? n->child != NULL :
995 n->parent->head->child != NULL && (n->child != NULL ||
996 (n->parent->tail != NULL && n->parent->tail->child != NULL)))
997 outflags &= ~(MD_spc | MD_nl);
998 return 1;
999 }
1000
1001 static void
1002 md_post_Eo(struct roff_node *n)
1003 {
1004 if (n->end != ENDBODY_NOT) {
1005 outflags |= MD_spc;
1006 return;
1007 }
1008
1009 if (n->child == NULL && n->parent->head->child == NULL)
1010 return;
1011
1012 if (n->parent->tail != NULL && n->parent->tail->child != NULL)
1013 outflags &= ~MD_spc;
1014 else
1015 outflags |= MD_spc;
1016 }
1017
1018 static int
1019 md_pre_Fa(struct roff_node *n)
1020 {
1021 int am_Fa;
1022
1023 am_Fa = n->tok == MDOC_Fa;
1024
1025 if (am_Fa)
1026 n = n->child;
1027
1028 while (n != NULL) {
1029 md_rawword("*");
1030 outflags &= ~MD_spc;
1031 md_node(n);
1032 outflags &= ~MD_spc;
1033 md_rawword("*");
1034 if ((n = n->next) != NULL)
1035 md_word(",");
1036 }
1037 return 0;
1038 }
1039
1040 static void
1041 md_post_Fa(struct roff_node *n)
1042 {
1043 if (n->next != NULL && n->next->tok == MDOC_Fa)
1044 md_word(",");
1045 }
1046
1047 static int
1048 md_pre_Fd(struct roff_node *n)
1049 {
1050 md_pre_syn(n);
1051 md_pre_raw(n);
1052 return 1;
1053 }
1054
1055 static void
1056 md_post_Fd(struct roff_node *n)
1057 {
1058 md_post_raw(n);
1059 outflags |= MD_br;
1060 }
1061
1062 static void
1063 md_post_Fl(struct roff_node *n)
1064 {
1065 md_post_raw(n);
1066 if (n->child == NULL && n->next != NULL &&
1067 n->next->type != ROFFT_TEXT && !(n->next->flags & NODE_LINE))
1068 outflags &= ~MD_spc;
1069 }
1070
1071 static int
1072 md_pre_Fn(struct roff_node *n)
1073 {
1074 md_pre_syn(n);
1075
1076 if ((n = n->child) == NULL)
1077 return 0;
1078
1079 md_rawword("**");
1080 outflags &= ~MD_spc;
1081 md_node(n);
1082 outflags &= ~MD_spc;
1083 md_rawword("**");
1084 outflags &= ~MD_spc;
1085 md_word("(");
1086
1087 if ((n = n->next) != NULL)
1088 md_pre_Fa(n);
1089 return 0;
1090 }
1091
1092 static void
1093 md_post_Fn(struct roff_node *n)
1094 {
1095 md_word(")");
1096 if (n->flags & NODE_SYNPRETTY) {
1097 md_word(";");
1098 outflags |= MD_sp;
1099 }
1100 }
1101
1102 static int
1103 md_pre_Fo(struct roff_node *n)
1104 {
1105 switch (n->type) {
1106 case ROFFT_BLOCK:
1107 md_pre_syn(n);
1108 break;
1109 case ROFFT_HEAD:
1110 if (n->child == NULL)
1111 return 0;
1112 md_pre_raw(n);
1113 break;
1114 case ROFFT_BODY:
1115 outflags &= ~(MD_spc | MD_nl);
1116 md_word("(");
1117 break;
1118 default:
1119 break;
1120 }
1121 return 1;
1122 }
1123
1124 static void
1125 md_post_Fo(struct roff_node *n)
1126 {
1127 switch (n->type) {
1128 case ROFFT_HEAD:
1129 if (n->child != NULL)
1130 md_post_raw(n);
1131 break;
1132 case ROFFT_BODY:
1133 md_post_Fn(n);
1134 break;
1135 default:
1136 break;
1137 }
1138 }
1139
1140 static int
1141 md_pre_In(struct roff_node *n)
1142 {
1143 if (n->flags & NODE_SYNPRETTY) {
1144 md_pre_syn(n);
1145 md_rawword("**");
1146 outflags &= ~MD_spc;
1147 md_word("#include <");
1148 } else {
1149 md_word("<");
1150 outflags &= ~MD_spc;
1151 md_rawword("*");
1152 }
1153 outflags &= ~MD_spc;
1154 return 1;
1155 }
1156
1157 static void
1158 md_post_In(struct roff_node *n)
1159 {
1160 if (n->flags & NODE_SYNPRETTY) {
1161 outflags &= ~MD_spc;
1162 md_rawword(">**");
1163 outflags |= MD_nl;
1164 } else {
1165 outflags &= ~MD_spc;
1166 md_rawword("*>");
1167 }
1168 }
1169
1170 static int
1171 md_pre_It(struct roff_node *n)
1172 {
1173 struct roff_node *bln;
1174
1175 switch (n->type) {
1176 case ROFFT_BLOCK:
1177 return 1;
1178
1179 case ROFFT_HEAD:
1180 bln = n->parent->parent;
1181 if (bln->norm->Bl.comp == 0 &&
1182 bln->norm->Bl.type != LIST_column)
1183 outflags |= MD_sp;
1184 outflags |= MD_nl;
1185
1186 switch (bln->norm->Bl.type) {
1187 case LIST_item:
1188 outflags |= MD_br;
1189 return 0;
1190 case LIST_inset:
1191 case LIST_diag:
1192 case LIST_ohang:
1193 outflags |= MD_br;
1194 return 1;
1195 case LIST_tag:
1196 case LIST_hang:
1197 outflags |= MD_sp;
1198 return 1;
1199 case LIST_bullet:
1200 md_rawword("*\t");
1201 break;
1202 case LIST_dash:
1203 case LIST_hyphen:
1204 md_rawword("-\t");
1205 break;
1206 case LIST_enum:
1207 md_preword();
1208 if (bln->norm->Bl.count < 99)
1209 bln->norm->Bl.count++;
1210 printf("%d.\t", bln->norm->Bl.count);
1211 escflags &= ~ESC_FON;
1212 break;
1213 case LIST_column:
1214 outflags |= MD_br;
1215 return 0;
1216 default:
1217 return 0;
1218 }
1219 outflags &= ~MD_spc;
1220 outflags |= MD_nonl;
1221 outcount = 0;
1222 md_stack('\t');
1223 if (code_blocks || quote_blocks)
1224 list_blocks++;
1225 return 0;
1226
1227 case ROFFT_BODY:
1228 bln = n->parent->parent;
1229 switch (bln->norm->Bl.type) {
1230 case LIST_ohang:
1231 outflags |= MD_br;
1232 break;
1233 case LIST_tag:
1234 case LIST_hang:
1235 md_pre_D1(n);
1236 break;
1237 default:
1238 break;
1239 }
1240 return 1;
1241
1242 default:
1243 return 0;
1244 }
1245 }
1246
1247 static void
1248 md_post_It(struct roff_node *n)
1249 {
1250 struct roff_node *bln;
1251 int i, nc;
1252
1253 if (n->type != ROFFT_BODY)
1254 return;
1255
1256 bln = n->parent->parent;
1257 switch (bln->norm->Bl.type) {
1258 case LIST_bullet:
1259 case LIST_dash:
1260 case LIST_hyphen:
1261 case LIST_enum:
1262 md_stack((char)-1);
1263 if (code_blocks || quote_blocks)
1264 list_blocks--;
1265 break;
1266 case LIST_tag:
1267 case LIST_hang:
1268 md_post_D1(n);
1269 break;
1270
1271 case LIST_column:
1272 if (n->next == NULL)
1273 break;
1274
1275 /* Calculate the array index of the current column. */
1276
1277 i = 0;
1278 while ((n = n->prev) != NULL && n->type != ROFFT_HEAD)
1279 i++;
1280
1281 /*
1282 * If a width was specified for this column,
1283 * subtract what printed, and
1284 * add the same spacing as in mdoc_term.c.
1285 */
1286
1287 nc = bln->norm->Bl.ncols;
1288 i = i < nc ? strlen(bln->norm->Bl.cols[i]) - outcount +
1289 (nc < 5 ? 4 : nc == 5 ? 3 : 1) : 1;
1290 if (i < 1)
1291 i = 1;
1292 while (i-- > 0)
1293 putchar(' ');
1294
1295 outflags &= ~MD_spc;
1296 escflags &= ~ESC_FON;
1297 outcount = 0;
1298 break;
1299
1300 default:
1301 break;
1302 }
1303 }
1304
1305 static void
1306 md_post_Lb(struct roff_node *n)
1307 {
1308 if (n->sec == SEC_LIBRARY)
1309 outflags |= MD_br;
1310 }
1311
1312 static void
1313 md_uri(const char *s)
1314 {
1315 while (*s != '\0') {
1316 if (strchr("%()<>", *s) != NULL) {
1317 printf("%%%2.2hhX", *s);
1318 outcount += 3;
1319 } else {
1320 putchar(*s);
1321 outcount++;
1322 }
1323 s++;
1324 }
1325 }
1326
1327 static int
1328 md_pre_Lk(struct roff_node *n)
1329 {
1330 const struct roff_node *link, *descr, *punct;
1331
1332 if ((link = n->child) == NULL)
1333 return 0;
1334
1335 /* Find beginning of trailing punctuation. */
1336 punct = n->last;
1337 while (punct != link && punct->flags & NODE_DELIMC)
1338 punct = punct->prev;
1339 punct = punct->next;
1340
1341 /* Link text. */
1342 descr = link->next;
1343 if (descr == punct)
1344 descr = link; /* no text */
1345 md_rawword("[");
1346 outflags &= ~MD_spc;
1347 do {
1348 md_word(descr->string);
1349 descr = descr->next;
1350 } while (descr != punct);
1351 outflags &= ~MD_spc;
1352
1353 /* Link target. */
1354 md_rawword("](");
1355 md_uri(link->string);
1356 outflags &= ~MD_spc;
1357 md_rawword(")");
1358
1359 /* Trailing punctuation. */
1360 while (punct != NULL) {
1361 md_word(punct->string);
1362 punct = punct->next;
1363 }
1364 return 0;
1365 }
1366
1367 static int
1368 md_pre_Mt(struct roff_node *n)
1369 {
1370 const struct roff_node *nch;
1371
1372 md_rawword("[");
1373 outflags &= ~MD_spc;
1374 for (nch = n->child; nch != NULL; nch = nch->next)
1375 md_word(nch->string);
1376 outflags &= ~MD_spc;
1377 md_rawword("](mailto:");
1378 for (nch = n->child; nch != NULL; nch = nch->next) {
1379 md_uri(nch->string);
1380 if (nch->next != NULL) {
1381 putchar(' ');
1382 outcount++;
1383 }
1384 }
1385 outflags &= ~MD_spc;
1386 md_rawword(")");
1387 return 0;
1388 }
1389
1390 static int
1391 md_pre_Nd(struct roff_node *n)
1392 {
1393 outflags &= ~MD_nl;
1394 outflags |= MD_spc;
1395 md_word("-");
1396 return 1;
1397 }
1398
1399 static int
1400 md_pre_Nm(struct roff_node *n)
1401 {
1402 switch (n->type) {
1403 case ROFFT_BLOCK:
1404 outflags |= MD_Bk;
1405 md_pre_syn(n);
1406 break;
1407 case ROFFT_HEAD:
1408 case ROFFT_ELEM:
1409 md_pre_raw(n);
1410 break;
1411 default:
1412 break;
1413 }
1414 return 1;
1415 }
1416
1417 static void
1418 md_post_Nm(struct roff_node *n)
1419 {
1420 switch (n->type) {
1421 case ROFFT_BLOCK:
1422 outflags &= ~MD_Bk;
1423 break;
1424 case ROFFT_HEAD:
1425 case ROFFT_ELEM:
1426 md_post_raw(n);
1427 break;
1428 default:
1429 break;
1430 }
1431 }
1432
1433 static int
1434 md_pre_No(struct roff_node *n)
1435 {
1436 outflags |= MD_spc_force;
1437 return 1;
1438 }
1439
1440 static int
1441 md_pre_Ns(struct roff_node *n)
1442 {
1443 outflags &= ~MD_spc;
1444 return 0;
1445 }
1446
1447 static void
1448 md_post_Pf(struct roff_node *n)
1449 {
1450 if (n->next != NULL && (n->next->flags & NODE_LINE) == 0)
1451 outflags &= ~MD_spc;
1452 }
1453
1454 static int
1455 md_pre_Pp(struct roff_node *n)
1456 {
1457 outflags |= MD_sp;
1458 return 0;
1459 }
1460
1461 static int
1462 md_pre_Rs(struct roff_node *n)
1463 {
1464 if (n->sec == SEC_SEE_ALSO)
1465 outflags |= MD_sp;
1466 return 1;
1467 }
1468
1469 static int
1470 md_pre_Sh(struct roff_node *n)
1471 {
1472 switch (n->type) {
1473 case ROFFT_BLOCK:
1474 if (n->sec == SEC_AUTHORS)
1475 outflags &= ~(MD_An_split | MD_An_nosplit);
1476 break;
1477 case ROFFT_HEAD:
1478 outflags |= MD_sp;
1479 md_rawword(n->tok == MDOC_Sh ? "#" : "##");
1480 break;
1481 case ROFFT_BODY:
1482 outflags |= MD_sp;
1483 break;
1484 default:
1485 break;
1486 }
1487 return 1;
1488 }
1489
1490 static int
1491 md_pre_Sm(struct roff_node *n)
1492 {
1493 if (n->child == NULL)
1494 outflags ^= MD_Sm;
1495 else if (strcmp("on", n->child->string) == 0)
1496 outflags |= MD_Sm;
1497 else
1498 outflags &= ~MD_Sm;
1499
1500 if (outflags & MD_Sm)
1501 outflags |= MD_spc;
1502
1503 return 0;
1504 }
1505
1506 static int
1507 md_pre_Vt(struct roff_node *n)
1508 {
1509 switch (n->type) {
1510 case ROFFT_BLOCK:
1511 md_pre_syn(n);
1512 return 1;
1513 case ROFFT_BODY:
1514 case ROFFT_ELEM:
1515 md_pre_raw(n);
1516 return 1;
1517 default:
1518 return 0;
1519 }
1520 }
1521
1522 static void
1523 md_post_Vt(struct roff_node *n)
1524 {
1525 switch (n->type) {
1526 case ROFFT_BODY:
1527 case ROFFT_ELEM:
1528 md_post_raw(n);
1529 break;
1530 default:
1531 break;
1532 }
1533 }
1534
1535 static int
1536 md_pre_Xr(struct roff_node *n)
1537 {
1538 n = n->child;
1539 if (n == NULL)
1540 return 0;
1541 md_node(n);
1542 n = n->next;
1543 if (n == NULL)
1544 return 0;
1545 outflags &= ~MD_spc;
1546 md_word("(");
1547 md_node(n);
1548 md_word(")");
1549 return 0;
1550 }
1551
1552 static int
1553 md_pre__T(struct roff_node *n)
1554 {
1555 if (n->parent->tok == MDOC_Rs && n->parent->norm->Rs.quote_T)
1556 md_word("\"");
1557 else
1558 md_rawword("*");
1559 outflags &= ~MD_spc;
1560 return 1;
1561 }
1562
1563 static void
1564 md_post__T(struct roff_node *n)
1565 {
1566 outflags &= ~MD_spc;
1567 if (n->parent->tok == MDOC_Rs && n->parent->norm->Rs.quote_T)
1568 md_word("\"");
1569 else
1570 md_rawword("*");
1571 md_post_pc(n);
1572 }
1573
1574 static int
1575 md_pre_br(struct roff_node *n)
1576 {
1577 outflags |= MD_br;
1578 return 0;
1579 }
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