1 /* $Id: html.c,v 1.152 2013/08/08 20:07:47 schwarze Exp $ */
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2011, 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
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.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #include <sys/types.h>
34 #include "libmandoc.h"
42 #define HTML_CLRLINE (1 << 0)
43 #define HTML_NOSTACK (1 << 1)
44 #define HTML_AUTOCLOSE (1 << 2) /* Tag has auto-closure. */
47 static const struct htmldata htmltags[TAG_MAX] = {
48 {"html", HTML_CLRLINE}, /* TAG_HTML */
49 {"head", HTML_CLRLINE}, /* TAG_HEAD */
50 {"body", HTML_CLRLINE}, /* TAG_BODY */
51 {"meta", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_META */
52 {"title", HTML_CLRLINE}, /* TAG_TITLE */
53 {"div", HTML_CLRLINE}, /* TAG_DIV */
54 {"h1", 0}, /* TAG_H1 */
55 {"h2", 0}, /* TAG_H2 */
56 {"span", 0}, /* TAG_SPAN */
57 {"link", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_LINK */
58 {"br", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_BR */
60 {"table", HTML_CLRLINE}, /* TAG_TABLE */
61 {"tbody", HTML_CLRLINE}, /* TAG_TBODY */
62 {"col", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_COL */
63 {"tr", HTML_CLRLINE}, /* TAG_TR */
64 {"td", HTML_CLRLINE}, /* TAG_TD */
65 {"li", HTML_CLRLINE}, /* TAG_LI */
66 {"ul", HTML_CLRLINE}, /* TAG_UL */
67 {"ol", HTML_CLRLINE}, /* TAG_OL */
68 {"dl", HTML_CLRLINE}, /* TAG_DL */
69 {"dt", HTML_CLRLINE}, /* TAG_DT */
70 {"dd", HTML_CLRLINE}, /* TAG_DD */
71 {"blockquote", HTML_CLRLINE}, /* TAG_BLOCKQUOTE */
72 {"p", HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_P */
73 {"pre", HTML_CLRLINE }, /* TAG_PRE */
74 {"b", 0 }, /* TAG_B */
75 {"i", 0 }, /* TAG_I */
76 {"code", 0 }, /* TAG_CODE */
77 {"small", 0 }, /* TAG_SMALL */
80 static const char *const htmlattrs[ATTR_MAX] = {
81 "http-equiv", /* ATTR_HTTPEQUIV */
82 "content", /* ATTR_CONTENT */
83 "name", /* ATTR_NAME */
85 "href", /* ATTR_HREF */
86 "type", /* ATTR_TYPE */
87 "media", /* ATTR_MEDIA */
88 "class", /* ATTR_CLASS */
89 "style", /* ATTR_STYLE */
90 "width", /* ATTR_WIDTH */
92 "summary", /* ATTR_SUMMARY */
93 "align", /* ATTR_ALIGN */
94 "colspan", /* ATTR_COLSPAN */
97 static const char *const roffscales[SCALE_MAX] = {
110 static void bufncat(struct html *, const char *, size_t);
111 static void print_ctag(struct html *, enum htmltag);
112 static int print_encode(struct html *, const char *, int);
113 static void print_metaf(struct html *, enum mandoc_esc);
114 static void print_attr(struct html *, const char *, const char *);
115 static void *ml_alloc(char *, enum htmltype);
118 ml_alloc(char *outopts, enum htmltype type)
126 toks[2] = "includes";
127 toks[3] = "fragment";
130 h = mandoc_calloc(1, sizeof(struct html));
134 h->symtab = mchars_alloc();
136 while (outopts && *outopts)
137 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
145 h->base_includes = v;
148 h->oflags |= HTML_FRAGMENT;
158 html_alloc(char *outopts)
161 return(ml_alloc(outopts, HTML_HTML_4_01_STRICT));
166 xhtml_alloc(char *outopts)
169 return(ml_alloc(outopts, HTML_XHTML_1_0_STRICT));
179 h = (struct html *)p;
181 while ((tag = h->tags.head) != NULL) {
182 h->tags.head = tag->next;
187 mchars_free(h->symtab);
194 print_gen_head(struct html *h)
196 struct htmlpair tag[4];
198 tag[0].key = ATTR_HTTPEQUIV;
199 tag[0].val = "Content-Type";
200 tag[1].key = ATTR_CONTENT;
201 tag[1].val = "text/html; charset=utf-8";
202 print_otag(h, TAG_META, 2, tag);
204 tag[0].key = ATTR_NAME;
205 tag[0].val = "resource-type";
206 tag[1].key = ATTR_CONTENT;
207 tag[1].val = "document";
208 print_otag(h, TAG_META, 2, tag);
211 tag[0].key = ATTR_REL;
212 tag[0].val = "stylesheet";
213 tag[1].key = ATTR_HREF;
214 tag[1].val = h->style;
215 tag[2].key = ATTR_TYPE;
216 tag[2].val = "text/css";
217 tag[3].key = ATTR_MEDIA;
219 print_otag(h, TAG_LINK, 4, tag);
224 print_metaf(struct html *h, enum mandoc_esc deco)
229 case (ESCAPE_FONTPREV):
232 case (ESCAPE_FONTITALIC):
233 font = HTMLFONT_ITALIC;
235 case (ESCAPE_FONTBOLD):
236 font = HTMLFONT_BOLD;
238 case (ESCAPE_FONTBI):
243 case (ESCAPE_FONTROMAN):
244 font = HTMLFONT_NONE;
252 print_tagq(h, h->metaf);
260 case (HTMLFONT_ITALIC):
261 h->metaf = print_otag(h, TAG_I, 0, NULL);
263 case (HTMLFONT_BOLD):
264 h->metaf = print_otag(h, TAG_B, 0, NULL);
267 h->metaf = print_otag(h, TAG_B, 0, NULL);
268 print_otag(h, TAG_I, 0, NULL);
276 html_strlen(const char *cp)
282 * Account for escaped sequences within string length
283 * calculations. This follows the logic in term_strlen() as we
284 * must calculate the width of produced strings.
285 * Assume that characters are always width of "1". This is
286 * hacky, but it gets the job done for approximation of widths.
292 rsz = strcspn(cp, "\\");
304 switch (mandoc_escape(&cp, NULL, NULL)) {
307 case (ESCAPE_UNICODE):
309 case (ESCAPE_NUMBERED):
311 case (ESCAPE_SPECIAL):
317 case (ESCAPE_SKIPCHAR):
328 print_encode(struct html *h, const char *p, int norecurse)
334 static const char rejs[6] = { '\\', '<', '>', '&', ASCII_HYPH, '\0' };
339 if (HTML_SKIPCHAR & h->flags && '\\' != *p) {
340 h->flags &= ~HTML_SKIPCHAR;
345 sz = strcspn(p, rejs);
347 fwrite(p, 1, sz, stdout);
370 esc = mandoc_escape(&p, &seq, &len);
371 if (ESCAPE_ERROR == esc)
377 case (ESCAPE_FONTPREV):
379 case (ESCAPE_FONTBOLD):
381 case (ESCAPE_FONTITALIC):
383 case (ESCAPE_FONTBI):
385 case (ESCAPE_FONTROMAN):
389 case (ESCAPE_SKIPCHAR):
390 h->flags |= HTML_SKIPCHAR;
396 if (h->flags & HTML_SKIPCHAR) {
397 h->flags &= ~HTML_SKIPCHAR;
402 case (ESCAPE_UNICODE):
403 /* Skip passed "u" header. */
404 c = mchars_num2uc(seq + 1, len - 1);
408 case (ESCAPE_NUMBERED):
409 c = mchars_num2char(seq, len);
413 case (ESCAPE_SPECIAL):
414 c = mchars_spec2cp(h->symtab, seq, len);
417 else if (-1 == c && 1 == len)
420 case (ESCAPE_NOSPACE):
434 print_attr(struct html *h, const char *key, const char *val)
436 printf(" %s=\"", key);
437 (void)print_encode(h, val, 1);
443 print_otag(struct html *h, enum htmltag tag,
444 int sz, const struct htmlpair *p)
449 /* Push this tags onto the stack of open scopes. */
451 if ( ! (HTML_NOSTACK & htmltags[tag].flags)) {
452 t = mandoc_malloc(sizeof(struct tag));
454 t->next = h->tags.head;
459 if ( ! (HTML_NOSPACE & h->flags))
460 if ( ! (HTML_CLRLINE & htmltags[tag].flags)) {
462 if ( ! (HTML_KEEP & h->flags)) {
463 if (HTML_PREKEEP & h->flags)
464 h->flags |= HTML_KEEP;
470 if ( ! (h->flags & HTML_NONOSPACE))
471 h->flags &= ~HTML_NOSPACE;
473 h->flags |= HTML_NOSPACE;
475 /* Print out the tag name and attributes. */
477 printf("<%s", htmltags[tag].name);
478 for (i = 0; i < sz; i++)
479 print_attr(h, htmlattrs[p[i].key], p[i].val);
481 /* Add non-overridable attributes. */
483 if (TAG_HTML == tag && HTML_XHTML_1_0_STRICT == h->type) {
484 print_attr(h, "xmlns", "http://www.w3.org/1999/xhtml");
485 print_attr(h, "xml:lang", "en");
486 print_attr(h, "lang", "en");
489 /* Accommodate for XML "well-formed" singleton escaping. */
491 if (HTML_AUTOCLOSE & htmltags[tag].flags)
493 case (HTML_XHTML_1_0_STRICT):
502 h->flags |= HTML_NOSPACE;
504 if ((HTML_AUTOCLOSE | HTML_CLRLINE) & htmltags[tag].flags)
512 print_ctag(struct html *h, enum htmltag tag)
515 printf("</%s>", htmltags[tag].name);
516 if (HTML_CLRLINE & htmltags[tag].flags) {
517 h->flags |= HTML_NOSPACE;
523 print_gen_decls(struct html *h)
530 case (HTML_HTML_4_01_STRICT):
532 doctype = "-//W3C//DTD HTML 4.01//EN";
533 dtd = "http://www.w3.org/TR/html4/strict.dtd";
536 puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
538 doctype = "-//W3C//DTD XHTML 1.0 Strict//EN";
539 dtd = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";
543 printf("<!DOCTYPE %s PUBLIC \"%s\" \"%s\">\n",
548 print_text(struct html *h, const char *word)
551 if ( ! (HTML_NOSPACE & h->flags)) {
553 if ( ! (HTML_KEEP & h->flags)) {
554 if (HTML_PREKEEP & h->flags)
555 h->flags |= HTML_KEEP;
561 assert(NULL == h->metaf);
563 case (HTMLFONT_ITALIC):
564 h->metaf = print_otag(h, TAG_I, 0, NULL);
566 case (HTMLFONT_BOLD):
567 h->metaf = print_otag(h, TAG_B, 0, NULL);
570 h->metaf = print_otag(h, TAG_B, 0, NULL);
571 print_otag(h, TAG_I, 0, NULL);
578 if ( ! print_encode(h, word, 0)) {
579 if ( ! (h->flags & HTML_NONOSPACE))
580 h->flags &= ~HTML_NOSPACE;
582 h->flags |= HTML_NOSPACE;
585 print_tagq(h, h->metaf);
589 h->flags &= ~HTML_IGNDELIM;
594 print_tagq(struct html *h, const struct tag *until)
598 while ((tag = h->tags.head) != NULL) {
600 * Remember to close out and nullify the current
601 * meta-font and table, if applicable.
607 print_ctag(h, tag->tag);
608 h->tags.head = tag->next;
610 if (until && tag == until)
617 print_stagq(struct html *h, const struct tag *suntil)
621 while ((tag = h->tags.head) != NULL) {
622 if (suntil && tag == suntil)
625 * Remember to close out and nullify the current
626 * meta-font and table, if applicable.
632 print_ctag(h, tag->tag);
633 h->tags.head = tag->next;
639 bufinit(struct html *h)
647 bufcat_style(struct html *h, const char *key, const char *val)
657 bufcat(struct html *h, const char *p)
660 h->buflen = strlcat(h->buf, p, BUFSIZ);
661 assert(h->buflen < BUFSIZ);
665 bufcat_fmt(struct html *h, const char *fmt, ...)
670 (void)vsnprintf(h->buf + (int)h->buflen,
671 BUFSIZ - h->buflen - 1, fmt, ap);
673 h->buflen = strlen(h->buf);
677 bufncat(struct html *h, const char *p, size_t sz)
680 assert(h->buflen + sz + 1 < BUFSIZ);
681 strncat(h->buf, p, sz);
686 buffmt_includes(struct html *h, const char *name)
690 pp = h->base_includes;
693 while (NULL != (p = strchr(pp, '%'))) {
694 bufncat(h, pp, (size_t)(p - pp));
710 buffmt_man(struct html *h,
711 const char *name, const char *sec)
718 while (NULL != (p = strchr(pp, '%'))) {
719 bufncat(h, pp, (size_t)(p - pp));
722 bufcat(h, sec ? sec : "1");
738 bufcat_su(struct html *h, const char *p, const struct roffsu *su)
743 if (SCALE_MM == su->unit && 0.0 == (v /= 100.0))
746 bufcat_fmt(h, "%s: %.2f%s;", p, v, roffscales[su->unit]);
750 bufcat_id(struct html *h, const char *src)
753 /* Cf. <http://www.w3.org/TR/html4/types.html#h-6.2>. */
756 bufcat_fmt(h, "%.2x", *src++);