X-Git-Url: https://git.cameronkatri.com/mandoc.git/blobdiff_plain/d49b74004ed6d2134c947f8d4f978ab2c1de3a1d..cc281721217973092f10a3c7a71ce0004c65dbb8:/html.c

diff --git a/html.c b/html.c
index 80991f14..24c17fb2 100644
--- a/html.c
+++ b/html.c
@@ -1,1084 +1,788 @@
-/* $Id: html.c,v 1.24 2008/12/10 13:41:58 kristaps Exp $ */
+/*	$Id: html.c,v 1.110 2010/07/26 22:26:05 kristaps Exp $ */
 /*
- * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the
- * above copyright notice and this permission notice appear in all
- * copies.
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
- * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
- * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
-#include <sys/param.h>
-#include <sys/stat.h>
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
 
 #include <assert.h>
-#include <err.h>
-#include <fcntl.h>
-#include <stdlib.h>
+#include <ctype.h>
+#include <stdarg.h>
 #include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
+#include "mandoc.h"
+#include "out.h"
+#include "chars.h"
 #include "html.h"
-#include "ml.h"
-
-/* TODO: allow head/tail-less invocations (just "div" start). */
+#include "main.h"
+
+struct	htmldata {
+	const char	 *name;
+	int		  flags;
+#define	HTML_CLRLINE	 (1 << 0)
+#define	HTML_NOSTACK	 (1 << 1)
+#define	HTML_AUTOCLOSE	 (1 << 2) /* Tag has auto-closure. */
+};
 
-struct	htmlnode {
-	int		 tok;
-	enum md_ns	 ns;
-	int		 argc[ROFF_MAXLINEARG];
-	char		*argv[ROFF_MAXLINEARG];
-	struct htmlnode	*parent;
+static	const struct htmldata htmltags[TAG_MAX] = {
+	{"html",	HTML_CLRLINE}, /* TAG_HTML */
+	{"head",	HTML_CLRLINE}, /* TAG_HEAD */
+	{"body",	HTML_CLRLINE}, /* TAG_BODY */
+	{"meta",	HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_META */
+	{"title",	HTML_CLRLINE}, /* TAG_TITLE */
+	{"div",		HTML_CLRLINE}, /* TAG_DIV */
+	{"h1",		0}, /* TAG_H1 */
+	{"h2",		0}, /* TAG_H2 */
+	{"span",	0}, /* TAG_SPAN */
+	{"link",	HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_LINK */
+	{"br",		HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_BR */
+	{"a",		0}, /* TAG_A */
+	{"table",	HTML_CLRLINE}, /* TAG_TABLE */
+	{"col",		HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_COL */
+	{"tr",		HTML_CLRLINE}, /* TAG_TR */
+	{"td",		HTML_CLRLINE}, /* TAG_TD */
+	{"li",		HTML_CLRLINE}, /* TAG_LI */
+	{"ul",		HTML_CLRLINE}, /* TAG_UL */
+	{"ol",		HTML_CLRLINE}, /* TAG_OL */
 };
 
-struct	htmlq {
-	struct htmlnode	*last;
+static	const char	*const htmlfonts[HTMLFONT_MAX] = {
+	"roman",
+	"bold",
+	"italic"
 };
 
+static	const char	*const htmlattrs[ATTR_MAX] = {
+	"http-equiv",
+	"content",
+	"name",
+	"rel",
+	"href",
+	"type",
+	"media",
+	"class",
+	"style",
+	"width",
+	"valign",
+	"target",
+	"id",
+	"summary",
+};
 
-static	int		html_loadcss(struct md_mbuf *, 
-				const char *);
-static	int		html_alloc(void **);
-static	void		html_free(void *);
-static	ssize_t		html_endtag(struct md_mbuf *, void *,
-				const struct md_args *, 
-				enum md_ns, int);
-static	ssize_t		html_beginstring(struct md_mbuf *, 
-				const struct md_args *, 
-				const char *, size_t);
-static	ssize_t		html_beginhttp(struct md_mbuf *, 
-				const struct md_args *, 
-				const char *, size_t);
-static	ssize_t		html_endstring(struct md_mbuf *, 
-				const struct md_args *, 
-				const char *, size_t);
-static	ssize_t		html_endhttp(struct md_mbuf *, 
-				const struct md_args *, 
+static	void		  print_spec(struct html *, enum roffdeco,
 				const char *, size_t);
-static	ssize_t		html_begintag(struct md_mbuf *, void *,
-				const struct md_args *, 
-				enum md_ns, int, 
-				const int *, const char **);
-static	int		html_begin(struct md_mbuf *,
-	       			const struct md_args *, 
-				const struct tm *, 
-				const char *, const char *, 
-				enum roffmsec, enum roffvol);
-static	int		html_printargs(struct md_mbuf *, int, 
-				const char *, const int *, 
-				const char **, size_t *);
-static	int		html_end(struct md_mbuf *,
-	       			const struct md_args *, 
-				const struct tm *, 
-				const char *, const char *, 
-				enum roffmsec, enum roffvol);
-static	int		html_blocktagname(struct md_mbuf *,
-				const struct md_args *, int, 
-				struct htmlq *, const int *, 
-				const char **, size_t *);
-static	int		html_blocktagargs(struct md_mbuf *,
-				const struct md_args *, int,
-				const int *, const char **, size_t *);
-static	int		html_headtagname(struct md_mbuf *,
-				const struct md_args *, int, 
-				struct htmlq *, const int *, 
-				const char **, size_t *);
-static	int		html_headtagargs(struct md_mbuf *,
-				const struct md_args *, int,
-				const int *, const char **, size_t *);
-static	int		html_bodytagname(struct md_mbuf *,
-				const struct md_args *, 
-				int, struct htmlq *, const int *, 
-				const char **, size_t *);
-static	int		html_bodytagargs(struct md_mbuf *,
-				const struct md_args *, int,
-				const int *, const char **, size_t *);
-static	int		html_inlinetagname(struct md_mbuf *,
-				const struct md_args *, int, size_t *);
-static	int		html_inlinetagargs(struct md_mbuf *,
-				const struct md_args *, int,
-				const int *, const char **, size_t *);
-static	int		html_Bl_bodytagname(struct md_mbuf *, 
-				struct htmlq *, const int *, 
-				const char **, size_t *);
-static	int		html_It_blocktagname(struct md_mbuf *, 
-				struct htmlq *, const int *, 
-				const char **, size_t *);
-static	int		html_It_headtagname(struct md_mbuf *, 
-				struct htmlq *, const int *, 
-				const char **, size_t *);
-static	int		html_It_bodytagname(struct md_mbuf *, 
-				struct htmlq *, const int *, 
-				const char **, size_t *);
-static	int		html_tputln(struct md_mbuf *, 
-				enum ml_scope, int, enum html_tag);
-static	int		html_aputln(struct md_mbuf *, enum ml_scope, 
-				int, enum html_tag, 
-				int, const struct html_pair *);
-
-
-/* ARGSUSED */
-static int
-html_It_headtagname(struct md_mbuf *mbuf, struct htmlq *q, 
-		const int *argc, const char **argv, size_t *res)
+static	void		  print_res(struct html *, const char *, size_t);
+static	void		  print_ctag(struct html *, enum htmltag);
+static	void		  print_doctype(struct html *);
+static	void		  print_xmltype(struct html *);
+static	int		  print_encode(struct html *, const char *, int);
+static	void		  print_metaf(struct html *, enum roffdeco);
+static	void		  print_attr(struct html *, 
+				const char *, const char *);
+static	void		 *ml_alloc(char *, enum htmltype);
+
+
+static void *
+ml_alloc(char *outopts, enum htmltype type)
 {
-	struct htmlnode	*n;
-	int		 i;
-
-	for (n = q->last; n; n = n->parent)
-		if (n->tok == ROFF_Bl)
-			break;
+	struct html	*h;
+	const char	*toks[4];
+	char		*v;
+
+	toks[0] = "style";
+	toks[1] = "man";
+	toks[2] = "includes";
+	toks[3] = NULL;
+
+	h = calloc(1, sizeof(struct html));
+	if (NULL == h) {
+		perror(NULL);
+		exit(EXIT_FAILURE);
+	}
 
-	assert(n);
+	h->type = type;
+	h->tags.head = NULL;
+	h->ords.head = NULL;
+	h->symtab = chars_init(CHARS_HTML);
 
-	/* LINTED */
-	for (i = 0; ROFF_ARGMAX != n->argc[i] &&
-			i < ROFF_MAXLINEARG; i++) {
-		switch (n->argc[i]) {
-		case (ROFF_Ohang):
-			return(html_stput(mbuf, HTML_TAG_DIV, res));
-		case (ROFF_Tag):
-			/* FALLTHROUGH */
-		case (ROFF_Column): 
-			return(html_stput(mbuf, HTML_TAG_TD, res));
+	while (outopts && *outopts)
+		switch (getsubopt(&outopts, UNCONST(toks), &v)) {
+		case (0):
+			h->style = v;
+			break;
+		case (1):
+			h->base_man = v;
+			break;
+		case (2):
+			h->base_includes = v;
+			break;
 		default:
 			break;
 		}
-	}
 
-	return(0);
+	return(h);
 }
 
-
-/* ARGSUSED */
-static int
-html_It_bodytagname(struct md_mbuf *mbuf, struct htmlq *q, 
-		const int *argc, const char **argv, size_t *res)
+void *
+html_alloc(char *outopts)
 {
-	struct htmlnode	*n;
-	int		 i;
-
-	for (n = q->last; n; n = n->parent)
-		if (n->tok == ROFF_Bl)
-			break;
 
-	assert(n);
-
-	/* LINTED */
-	for (i = 0; ROFF_ARGMAX != n->argc[i] &&
-			i < ROFF_MAXLINEARG; i++) {
-		switch (n->argc[i]) {
-		case (ROFF_Enum):
-			/* FALLTHROUGH */
-		case (ROFF_Bullet):
-			/* FALLTHROUGH */
-		case (ROFF_Dash):
-			/* FALLTHROUGH */
-		case (ROFF_Hyphen):
-			/* FALLTHROUGH */
-		case (ROFF_Item):
-			/* FALLTHROUGH */
-		case (ROFF_Diag):
-			/* FALLTHROUGH */
-		case (ROFF_Hang):
-			/* FALLTHROUGH */
-		case (ROFF_Ohang): 
-			/* FALLTHROUGH */
-		case (ROFF_Inset):
-			return(html_stput(mbuf, HTML_TAG_DIV, res));
-		case (ROFF_Tag):
-			/* FALLTHROUGH */
-		case (ROFF_Column): 
-			return(html_stput(mbuf, HTML_TAG_TD, res));
-		default:
-			break;
-		}
-	}
-
-	assert(i != ROFF_MAXLINEARG);
-	return(0);
+	return(ml_alloc(outopts, HTML_HTML_4_01_STRICT));
 }
 
 
-/* ARGSUSED */
-static int
-html_Bl_bodytagname(struct md_mbuf *mbuf, struct htmlq *q, 
-		const int *argc, const char **argv, size_t *res)
+void *
+xhtml_alloc(char *outopts)
 {
-	int		 i;
 
-	for (i = 0; ROFF_ARGMAX != argc[i]
-			&& i < ROFF_MAXLINEARG; i++) {
-		switch (argc[i]) {
-		case (ROFF_Enum):
-			return(html_stput(mbuf, HTML_TAG_OL, res));
-		case (ROFF_Bullet):
-			/* FALLTHROUGH */
-		case (ROFF_Dash):
-			/* FALLTHROUGH */
-		case (ROFF_Hyphen):
-			/* FALLTHROUGH */
-		case (ROFF_Item):
-			/* FALLTHROUGH */
-		case (ROFF_Diag):
-			/* FALLTHROUGH */
-		case (ROFF_Hang):
-			/* FALLTHROUGH */
-		case (ROFF_Ohang): 
-			/* FALLTHROUGH */
-		case (ROFF_Inset):
-			return(html_stput(mbuf, HTML_TAG_UL, res));
-		case (ROFF_Tag):
-			/* FALLTHROUGH */
-		case (ROFF_Column): 
-			return(html_stput(mbuf, HTML_TAG_TABLE, res));
-		default:
-			break;
-		}
-	}
-
-	assert(i != ROFF_MAXLINEARG);
-	return(0);
+	return(ml_alloc(outopts, HTML_XHTML_1_0_STRICT));
 }
 
 
-/* ARGSUSED */
-static int
-html_It_blocktagname(struct md_mbuf *mbuf, struct htmlq *q, 
-		const int *argc, const char **argv, size_t *res)
+void
+html_free(void *p)
 {
-	struct htmlnode	*n;
-	int		 i;
+	struct tag	*tag;
+	struct ord	*ord;
+	struct html	*h;
 
-	for (n = q->last; n; n = n->parent)
-		if (n->tok == ROFF_Bl)
-			break;
+	h = (struct html *)p;
 
-	assert(n);
+	while ((ord = h->ords.head) != NULL) { 
+		h->ords.head = ord->next;
+		free(ord);
+	}
 
-	/* LINTED */
-	for (i = 0; ROFF_ARGMAX != n->argc[i] &&
-			i < ROFF_MAXLINEARG; i++) {
-		switch (n->argc[i]) {
-		case (ROFF_Enum):
-			/* FALLTHROUGH */
-		case (ROFF_Bullet):
-			/* FALLTHROUGH */
-		case (ROFF_Dash):
-			/* FALLTHROUGH */
-		case (ROFF_Hyphen):
-			/* FALLTHROUGH */
-		case (ROFF_Item):
-			/* FALLTHROUGH */
-		case (ROFF_Diag):
-			/* FALLTHROUGH */
-		case (ROFF_Hang):
-			/* FALLTHROUGH */
-		case (ROFF_Ohang): 
-			/* FALLTHROUGH */
-		case (ROFF_Inset):
-			return(html_stput(mbuf, HTML_TAG_LI, res));
-		case (ROFF_Tag):
-			/* FALLTHROUGH */
-		case (ROFF_Column): 
-			return(html_stput(mbuf, HTML_TAG_TR, res));
-		default:
-			break;
-		}
+	while ((tag = h->tags.head) != NULL) {
+		h->tags.head = tag->next;	
+		free(tag);
 	}
+	
+	if (h->symtab)
+		chars_free(h->symtab);
 
-	assert(i != ROFF_MAXLINEARG);
-	return(0);
+	free(h);
 }
 
 
-static int
-html_loadcss(struct md_mbuf *mbuf, const char *css)
+void
+print_gen_head(struct html *h)
 {
-	size_t		 res, bufsz;
-	char		*buf;
-	struct stat	 st;
-	int		 fd, c;
-	ssize_t		 ssz;
-
-	c = 0;
-	res = 0;
-	buf = NULL;
-
-	if (-1 == (fd = open(css, O_RDONLY, 0))) {
-		warn("%s", css);
-		return(0);
-	} 
-	
-	if (-1 == fstat(fd, &st)) {
-		warn("%s", css);
-		goto out;
-	}
-
-	bufsz = MAX(st.st_blksize, BUFSIZ);
-	if (NULL == (buf = malloc(bufsz))) {
-		warn("malloc");
-		goto out;
-	}
-
-	for (;;) {
-		if (-1 == (ssz = read(fd, buf, bufsz))) {
-			warn("%s", css);
-			goto out;
-		} else if (0 == ssz)
-			break;
-		if ( ! ml_nputs(mbuf, buf, (size_t)ssz, &res))
-			goto out;
+	struct htmlpair	 tag[4];
+
+	tag[0].key = ATTR_HTTPEQUIV;
+	tag[0].val = "Content-Type";
+	tag[1].key = ATTR_CONTENT;
+	tag[1].val = "text/html; charset=utf-8";
+	print_otag(h, TAG_META, 2, tag);
+
+	tag[0].key = ATTR_NAME;
+	tag[0].val = "resource-type";
+	tag[1].key = ATTR_CONTENT;
+	tag[1].val = "document";
+	print_otag(h, TAG_META, 2, tag);
+
+	if (h->style) {
+		tag[0].key = ATTR_REL;
+		tag[0].val = "stylesheet";
+		tag[1].key = ATTR_HREF;
+		tag[1].val = h->style;
+		tag[2].key = ATTR_TYPE;
+		tag[2].val = "text/css";
+		tag[3].key = ATTR_MEDIA;
+		tag[3].val = "all";
+		print_otag(h, TAG_LINK, 4, tag);
 	}
+}
 
-	c = 1;
 
-out:
-	if (-1 == close(fd)) {
-		warn("%s", css);
-		c = 0;
-	}
+static void
+print_spec(struct html *h, enum roffdeco d, const char *p, size_t len)
+{
+	int		 cp;
+	const char	*rhs;
+	size_t		 sz;
+
+	if ((cp = chars_spec2cp(h->symtab, p, len)) > 0) {
+		printf("&#%d;", cp);
+		return;
+	} else if (-1 == cp && DECO_SSPECIAL == d) {
+		fwrite(p, 1, len, stdout);
+		return;
+	} else if (-1 == cp)
+		return;
+
+	if (NULL != (rhs = chars_spec2str(h->symtab, p, len, &sz)))
+		fwrite(rhs, 1, sz, stdout);
+}
 
-	if (buf)
-		free(buf);
 
-	return(c);
+static void
+print_res(struct html *h, const char *p, size_t len)
+{
+	int		 cp;
+	const char	*rhs;
+	size_t		 sz;
+
+	if ((cp = chars_res2cp(h->symtab, p, len)) > 0) {
+		printf("&#%d;", cp);
+		return;
+	} else if (-1 == cp)
+		return;
+
+	if (NULL != (rhs = chars_res2str(h->symtab, p, len, &sz)))
+		fwrite(rhs, 1, sz, stdout);
 }
 
 
-static int
-html_tputln(struct md_mbuf *mbuf, enum ml_scope scope,
-		int i, enum html_tag tag)
+struct tag *
+print_ofont(struct html *h, enum htmlfont font)
 {
+	struct htmlpair	 tag;
+
+	h->metal = h->metac;
+	h->metac = font;
+
+	/* FIXME: DECO_ROMAN should just close out preexisting. */
+
+	if (h->metaf && h->tags.head == h->metaf)
+		print_tagq(h, h->metaf);
 
-	if ( ! ml_putchars(mbuf, ' ', INDENT(i) * INDENT_SZ, NULL))
-		return(0);
-	if ( ! html_tput(mbuf, scope, tag, NULL))
-		return(0);
-	return(ml_nputs(mbuf, "\n", 1, NULL));
+	PAIR_CLASS_INIT(&tag, htmlfonts[font]);
+	h->metaf = print_otag(h, TAG_SPAN, 1, &tag);
+	return(h->metaf);
 }
 
 
-static int
-html_aputln(struct md_mbuf *mbuf, enum ml_scope scope, int i, 
-		enum html_tag tag, int sz, const struct html_pair *p)
+static void
+print_metaf(struct html *h, enum roffdeco deco)
 {
+	enum htmlfont	 font;
+
+	switch (deco) {
+	case (DECO_PREVIOUS):
+		font = h->metal;
+		break;
+	case (DECO_ITALIC):
+		font = HTMLFONT_ITALIC;
+		break;
+	case (DECO_BOLD):
+		font = HTMLFONT_BOLD;
+		break;
+	case (DECO_ROMAN):
+		font = HTMLFONT_NONE;
+		break;
+	default:
+		abort();
+		/* NOTREACHED */
+	}
 
-	if ( ! ml_putchars(mbuf, ' ', INDENT(i) * INDENT_SZ, NULL))
-		return(0);
-	if ( ! html_aput(mbuf, scope, tag, NULL, sz, p))
-		return(0);
-	return(ml_nputs(mbuf, "\n", 1, NULL));
+	(void)print_ofont(h, font);
 }
 
 
-/* ARGSUSED */
-static int 
-html_begin(struct md_mbuf *mbuf, const struct md_args *args,
-		const struct tm *tm, const char *os, 
-		const char *name, enum roffmsec msec, enum roffvol vol)
+static int
+print_encode(struct html *h, const char *p, int norecurse)
 {
-	enum roffvol	 bvol;
-	struct html_pair attr[4];
-	char		 ts[32], title[64];
-	int		 i;
+	size_t		 sz;
+	int		 len, nospace;
+	const char	*seq;
+	enum roffdeco	 deco;
+	static const char rejs[6] = { '\\', '<', '>', '&', ASCII_HYPH, '\0' };
+
+	nospace = 0;
+
+	for (; *p; p++) {
+		sz = strcspn(p, rejs);
+
+		fwrite(p, 1, sz, stdout);
+		p += /* LINTED */
+			sz;
+
+		if ('<' == *p) {
+			printf("&lt;");
+			continue;
+		} else if ('>' == *p) {
+			printf("&gt;");
+			continue;
+		} else if ('&' == *p) {
+			printf("&amp;");
+			continue;
+		} else if (ASCII_HYPH == *p) {
+			/*
+			 * Note: "soft hyphens" aren't graphically
+			 * displayed when not breaking the text; we want
+			 * them to be displayed.
+			 */
+			/*printf("&#173;");*/
+			putchar('-');
+			continue;
+		} else if ('\0' == *p)
+			break;
 
-	(void)snprintf(ts, sizeof(ts), "%s(%s)", 
-			name, roff_msecname(msec));
+		seq = ++p;
+		len = a2roffdeco(&deco, &seq, &sz);
 
-	if (vol >= ROFF_ARCH_START) {
-		switch (msec) {
-		case(ROFF_MSEC_1):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_6):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_7):
-			bvol = ROFF_VOL_URM;
+		switch (deco) {
+		case (DECO_RESERVED):
+			print_res(h, seq, sz);
 			break;
-		case(ROFF_MSEC_2):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_3):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_3p):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_4):
+		case (DECO_SSPECIAL):
 			/* FALLTHROUGH */
-		case(ROFF_MSEC_5):
-			bvol = ROFF_VOL_PRM;
+		case (DECO_SPECIAL):
+			print_spec(h, deco, seq, sz);
 			break;
-		case(ROFF_MSEC_8):
-			bvol = ROFF_VOL_PRM;
-			break;
-		case(ROFF_MSEC_9):
-			bvol = ROFF_VOL_KM;
-			break;
-		case(ROFF_MSEC_UNASS):
+		case (DECO_PREVIOUS):
 			/* FALLTHROUGH */
-		case(ROFF_MSEC_DRAFT):
+		case (DECO_BOLD):
 			/* FALLTHROUGH */
-		case(ROFF_MSEC_PAPER):
-			bvol = ROFF_VOL_NONE;
+		case (DECO_ITALIC):
+			/* FALLTHROUGH */
+		case (DECO_ROMAN):
+			if (norecurse)
+				break;
+			print_metaf(h, deco);
 			break;
 		default:
-			abort();
-			/* NOTREACHED */
+			break;
 		}
 
-		(void)snprintf(title, sizeof(title), "%s (%s)",
-				roff_volname(bvol), roff_volname(vol));
-	} else
-		(void)snprintf(title, sizeof(title), "%s", roff_volname(vol));
-
-
-	i = 0;
-
-	if ( ! html_typeput(mbuf, HTML_TYPE_4_01_STRICT, NULL))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_OPEN, i, HTML_TAG_HTML))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_OPEN, i++, HTML_TAG_HEAD))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_HTTP_EQUIV;
-	attr[0].val = "content-type";
-	attr[1].attr = HTML_ATTR_CONTENT;
-	attr[1].val = "text/html;charset=utf-8";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i, HTML_TAG_META, 2, attr))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_NAME;
-	attr[0].val = "resource-type";
-	attr[1].attr = HTML_ATTR_CONTENT;
-	attr[1].val = "document";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i, HTML_TAG_META, 2, attr))
-		return(0);
-
-	if ( ! html_tputln(mbuf, ML_OPEN, i, HTML_TAG_TITLE))
-		return(0);
-	if ( ! ml_putstring(mbuf, ts, NULL))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_CLOSE, i, HTML_TAG_TITLE))
-		return(0);
-
-	if (HTML_CSS_EMBED & args->params.html.flags) {
-		attr[0].attr = HTML_ATTR_TYPE;
-		attr[0].val = "text/css";
-
-		if ( ! html_aputln(mbuf, ML_OPEN, i, 
-					HTML_TAG_STYLE, 1, attr))
-			return(0);
-		if ( ! html_commentput(mbuf, ML_OPEN, NULL))
-			return(0);
-
-		if ( ! html_loadcss(mbuf, args->params.html.css))
-			return(0);
-
-		if ( ! html_commentput(mbuf, ML_CLOSE, NULL))
-			return(0);
-		if ( ! html_tputln(mbuf, ML_CLOSE, i, HTML_TAG_STYLE))
-			return(0);
-	} else {
-		attr[0].attr = HTML_ATTR_REL;
-		attr[0].val = "stylesheet";
-		attr[1].attr = HTML_ATTR_TYPE;
-		attr[1].val = "text/css";
-		attr[2].attr = HTML_ATTR_HREF;
-		attr[2].val = args->params.html.css;
-
-		if ( ! html_aputln(mbuf, ML_OPEN, i,
-					HTML_TAG_LINK, 3, attr))
-			return(0);
+		p += len - 1;
+
+		if (DECO_NOSPACE == deco && '\0' == *(p + 1))
+			nospace = 1;
 	}
 
-	if ( ! html_tputln(mbuf, ML_CLOSE, --i, HTML_TAG_HEAD))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_OPEN, i, HTML_TAG_BODY))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_CLASS;
-	attr[0].val = "mdoc";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i, HTML_TAG_DIV, 1, attr))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_WIDTH;
-	attr[0].val = "100%";
-	attr[1].attr = HTML_ATTR_CLASS;
-	attr[1].val = "header-table";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i++, HTML_TAG_TABLE, 2, attr))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_OPEN, i++, HTML_TAG_TR))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_ALIGN;
-	attr[0].val = "left";
-	attr[1].attr = HTML_ATTR_CLASS;
-	attr[1].val = "header-section";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i, HTML_TAG_TD, 2, attr))
-		return(0);
-	if ( ! ml_putstring(mbuf, ts, NULL))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_CLOSE, i, HTML_TAG_TD))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_ALIGN;
-	attr[0].val = "center";
-	attr[1].attr = HTML_ATTR_CLASS;
-	attr[1].val = "header-volume";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i, HTML_TAG_TD, 2, attr))
-		return(0);
-	if ( ! ml_putstring(mbuf, title, NULL))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_CLOSE, i, HTML_TAG_TD))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_ALIGN;
-	attr[0].val = "right";
-	attr[1].attr = HTML_ATTR_CLASS;
-	attr[1].val = "header-section";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i, HTML_TAG_TD, 2, attr))
-		return(0);
-	if ( ! ml_putstring(mbuf, ts, NULL))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_CLOSE, i, HTML_TAG_TD))
-		return(0);
-
-	if ( ! html_tputln(mbuf, ML_CLOSE, --i, HTML_TAG_TR))
-		return(0);
-	return(html_tputln(mbuf, ML_CLOSE, --i, HTML_TAG_TABLE));
+	return(nospace);
 }
 
 
-/* ARGSUSED */
-static int 
-html_end(struct md_mbuf *mbuf, const struct md_args *args,
-		const struct tm *tm, const char *os, 
-		const char *name, enum roffmsec msec, enum roffvol vol)
+static void
+print_attr(struct html *h, const char *key, const char *val)
 {
-	struct html_pair attr[4];
-	int		 i;
-	char		 ts[64];
-
-	if (0 == strftime(ts, sizeof(ts), "%B %d, %Y", tm)) {
-		warn("strftime");
-		return(0);
-	}
-
-	i = 0;
-
-	attr[0].attr = HTML_ATTR_WIDTH;
-	attr[0].val = "100%";
-	attr[1].attr = HTML_ATTR_CLASS;
-	attr[1].val = "header-footer";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i++, HTML_TAG_TABLE, 2, attr))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_OPEN, i++, HTML_TAG_TR))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_ALIGN;
-	attr[0].val = "left";
-	attr[1].attr = HTML_ATTR_CLASS;
-	attr[1].val = "footer-os";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i, HTML_TAG_TD, 2, attr))
-		return(0);
-	if ( ! ml_putstring(mbuf, os, NULL))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_CLOSE, i, HTML_TAG_TD))
-		return(0);
-
-	attr[0].attr = HTML_ATTR_ALIGN;
-	attr[0].val = "right";
-	attr[1].attr = HTML_ATTR_CLASS;
-	attr[1].val = "footer-date";
-
-	if ( ! html_aputln(mbuf, ML_OPEN, i, HTML_TAG_TD, 2, attr))
-		return(0);
-	if ( ! ml_putstring(mbuf, ts, NULL))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_CLOSE, i, HTML_TAG_TD))
-		return(0);
-
-	if ( ! html_tputln(mbuf, ML_CLOSE, --i, HTML_TAG_TR))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_CLOSE, --i, HTML_TAG_TABLE))
-		return(0);
-
-	if ( ! html_tputln(mbuf, ML_CLOSE, 0, HTML_TAG_DIV))
-		return(0);
-	if ( ! html_tputln(mbuf, ML_CLOSE, 0, HTML_TAG_BODY))
-		return(0);
-	return(html_tputln(mbuf, ML_CLOSE, 0, HTML_TAG_HTML));
+	printf(" %s=\"", key);
+	(void)print_encode(h, val, 1);
+	putchar('\"');
 }
 
 
-/* ARGSUSED */
-static int
-html_bodytagname(struct md_mbuf *mbuf, 
-		const struct md_args *args, int tok, struct htmlq *q, 
-		const int *argc, const char **argv, size_t *res)
+struct tag *
+print_otag(struct html *h, enum htmltag tag, 
+		int sz, const struct htmlpair *p)
 {
+	int		 i;
+	struct tag	*t;
 
-	switch (tok) {
-	case (ROFF_Bl):
-		return(html_Bl_bodytagname(mbuf, q, argc, argv, res));
-	case (ROFF_Fo):
-		return(html_stput(mbuf, HTML_TAG_SPAN, res));
-	case (ROFF_It):
-		return(html_It_bodytagname(mbuf, q, argc, argv, res));
-	case (ROFF_Oo):
-		return(html_stput(mbuf, HTML_TAG_SPAN, res));
-	default:
-		break;
-	}
-
-	return(html_stput(mbuf, HTML_TAG_DIV, res));
-}
-
+	/* Push this tags onto the stack of open scopes. */
 
-/* ARGSUSED */
-static int
-html_headtagname(struct md_mbuf *mbuf, 
-		const struct md_args *args, int tok, struct htmlq *q, 
-		const int *argc, const char **argv, size_t *res)
-{
+	if ( ! (HTML_NOSTACK & htmltags[tag].flags)) {
+		t = malloc(sizeof(struct tag));
+		if (NULL == t) {
+			perror(NULL);
+			exit(EXIT_FAILURE);
+		}
+		t->tag = tag;
+		t->next = h->tags.head;
+		h->tags.head = t;
+	} else
+		t = NULL;
+
+	if ( ! (HTML_NOSPACE & h->flags))
+		if ( ! (HTML_CLRLINE & htmltags[tag].flags)) {
+			/* Manage keeps! */
+			if ( ! (HTML_KEEP & h->flags)) {
+				if (HTML_PREKEEP & h->flags)
+					h->flags |= HTML_KEEP;
+				putchar(' ');
+			} else
+				printf("&#160;");
+		}
 
-	switch (tok) {
-	case (ROFF_It):
-		return(html_It_headtagname(mbuf, q, argc, argv, res));
-	case (ROFF_Fo):
-		/* FALLTHROUGH */
-	case (ROFF_Oo):
-		return(html_stput(mbuf, HTML_TAG_SPAN, res));
-	case (ROFF_Sh):
-		return(html_stput(mbuf, HTML_TAG_H1, res));
-	case (ROFF_Ss):
-		return(html_stput(mbuf, HTML_TAG_H2, res));
-	default:
-		break;
-	}
+	if ( ! (h->flags & HTML_NONOSPACE))
+		h->flags &= ~HTML_NOSPACE;
+	else
+		h->flags |= HTML_NOSPACE;
 
-	return(html_stput(mbuf, HTML_TAG_DIV, res));
-}
+	/* Print out the tag name and attributes. */
 
+	printf("<%s", htmltags[tag].name);
+	for (i = 0; i < sz; i++)
+		print_attr(h, htmlattrs[p[i].key], p[i].val);
 
-/* ARGSUSED */
-static int
-html_blocktagname(struct md_mbuf *mbuf, const struct md_args *args, 
-		int tok, struct htmlq *q, const int *argc, 
-		const char **argv, size_t *res)
-{
+	/* Add non-overridable attributes. */
 
-	switch (tok) {
-	case (ROFF_Fo):
-		/* FALLTHROUGH */
-	case (ROFF_Oo):
-		return(html_stput(mbuf, HTML_TAG_SPAN, res));
-	case (ROFF_It):
-		return(html_It_blocktagname(mbuf, q, argc, argv, res));
-	default:
-		break;
+	if (TAG_HTML == tag && HTML_XHTML_1_0_STRICT == h->type) {
+		print_attr(h, "xmlns", "http://www.w3.org/1999/xhtml");
+		print_attr(h, "xml:lang", "en");
+		print_attr(h, "lang", "en");
 	}
 
-	return(html_stput(mbuf, HTML_TAG_DIV, res));
-}
+	/* Accomodate for XML "well-formed" singleton escaping. */
 
+	if (HTML_AUTOCLOSE & htmltags[tag].flags)
+		switch (h->type) {
+		case (HTML_XHTML_1_0_STRICT):
+			putchar('/');
+			break;
+		default:
+			break;
+		}
 
-/* ARGSUSED */
-static int
-html_printargs(struct md_mbuf *mbuf, int tok, const char *ns,
-		const int *argc, const char **argv, size_t *res)
-{
+	putchar('>');
 
-	/* FIXME: use API in ml.h. */
-
-	if ( ! ml_puts(mbuf, " class=\"", res))
-		return(0);
-	if ( ! ml_puts(mbuf, ns, res))
-		return(0);
-	if ( ! ml_puts(mbuf, "-", res))
-		return(0);
-	if ( ! ml_puts(mbuf, toknames[tok], res))
-		return(0);
-	return(ml_puts(mbuf, "\"", res));
+	h->flags |= HTML_NOSPACE;
+	return(t);
 }
 
 
-/* ARGSUSED */
-static int
-html_headtagargs(struct md_mbuf *mbuf, 
-		const struct md_args *args, int tok, 
-		const int *argc, const char **argv, size_t *res)
+static void
+print_ctag(struct html *h, enum htmltag tag)
 {
-
-	return(html_printargs(mbuf, tok, "head", argc, argv, res));
+	
+	printf("</%s>", htmltags[tag].name);
+	if (HTML_CLRLINE & htmltags[tag].flags) {
+		h->flags |= HTML_NOSPACE;
+		putchar('\n');
+	} 
 }
 
 
-/* ARGSUSED */
-static int
-html_bodytagargs(struct md_mbuf *mbuf, 
-		const struct md_args *args, int tok, 
-		const int *argc, const char **argv, size_t *res)
+void
+print_gen_decls(struct html *h)
 {
 
-	return(html_printargs(mbuf, tok, "body", argc, argv, res));
+	print_xmltype(h);
+	print_doctype(h);
 }
 
 
-/* ARGSUSED */
-static int
-html_blocktagargs(struct md_mbuf *mbuf, 
-		const struct md_args *args, int tok, 
-		const int *argc, const char **argv, size_t *res)
+static void
+print_xmltype(struct html *h)
 {
 
-	return(html_printargs(mbuf, tok, "block", argc, argv, res));
+	if (HTML_XHTML_1_0_STRICT == h->type)
+		printf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
 }
 
 
-/* ARGSUSED */
-static int
-html_inlinetagargs(struct md_mbuf *mbuf, 
-		const struct md_args *args, int tok, 
-		const int *argc, const char **argv, size_t *res)
+static void
+print_doctype(struct html *h)
 {
-
-	if ( ! html_printargs(mbuf, tok, "inline", argc, argv, res))
-		return(0);
-
-	switch (tok) {
-	case (ROFF_Sh):
-
-		/* FIXME: use API in ml.h. */
-
-		assert(*argv);
-		if ( ! ml_nputs(mbuf, " name=\"", 7, res))
-			return(0);
-		if ( ! ml_putstring(mbuf, *argv++, res))
-			return(0);
-		while (*argv) {
-			if ( ! ml_putstring(mbuf, "_", res))
-				return(0);
-			if ( ! ml_putstring(mbuf, *argv++, res))
-				return(0);
-		}
-		if ( ! ml_nputs(mbuf, "\"", 1, res))
-			return(0);
-		break;
-
-	case (ROFF_Sx):
-
-		/* FIXME: use API in ml.h. */
-
-		assert(*argv);
-		if ( ! ml_nputs(mbuf, " href=\"#", 8, res))
-			return(0);
-		if ( ! ml_putstring(mbuf, *argv++, res))
-			return(0);
-		while (*argv) {
-			if ( ! ml_putstring(mbuf, "_", res))
-				return(0);
-			if ( ! ml_putstring(mbuf, *argv++, res))
-				return(0);
-		}
-		if ( ! ml_nputs(mbuf, "\"", 1, res))
-			return(0);
-
-		break;
-	default:
+	const char	*doctype;
+	const char	*dtd;
+	const char	*name;
+
+	switch (h->type) {
+	case (HTML_HTML_4_01_STRICT):
+		name = "HTML";
+		doctype = "-//W3C//DTD HTML 4.01//EN";
+		dtd = "http://www.w3.org/TR/html4/strict.dtd";
 		break;
-	}
-	
-	return(1);
-}
-
-
-/* ARGSUSED */
-static int
-html_inlinetagname(struct md_mbuf *mbuf, 
-		const struct md_args *args, int tok, size_t *res)
-{
-
-	switch (tok) {
-	case (ROFF_Sh):
-		return(html_stput(mbuf, HTML_TAG_A, res));
-	case (ROFF_Pp):
-		return(html_stput(mbuf, HTML_TAG_DIV, res));
-	case (ROFF_Sx):
-		return(html_stput(mbuf, HTML_TAG_A, res));
 	default:
+		name = "html";
+		doctype = "-//W3C//DTD XHTML 1.0 Strict//EN";
+		dtd = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";
 		break;
 	}
 
-	return(html_stput(mbuf, HTML_TAG_SPAN, res));
+	printf("<!DOCTYPE %s PUBLIC \"%s\" \"%s\">\n", 
+			name, doctype, dtd);
 }
 
 
-static ssize_t 
-html_begintag(struct md_mbuf *mbuf, void *data,
-		const struct md_args *args, enum md_ns ns, 
-		int tok, const int *argc, const char **argv)
+void
+print_text(struct html *h, const char *word)
 {
-	size_t		 res;
-	struct htmlq	*q;
-	struct htmlnode	*node;
-	int		 i;
-
-	assert(ns != MD_NS_DEFAULT);
-	res = 0;
 
-	assert(data);
-	q = (struct htmlq *)data;
+	if (word[0] && '\0' == word[1])
+		switch (word[0]) {
+		case('.'):
+			/* FALLTHROUGH */
+		case(','):
+			/* FALLTHROUGH */
+		case(';'):
+			/* FALLTHROUGH */
+		case(':'):
+			/* FALLTHROUGH */
+		case('?'):
+			/* FALLTHROUGH */
+		case('!'):
+			/* FALLTHROUGH */
+		case(')'):
+			/* FALLTHROUGH */
+		case(']'):
+			if ( ! (HTML_IGNDELIM & h->flags))
+				h->flags |= HTML_NOSPACE;
+			break;
+		default:
+			break;
+		}
 
-	if (NULL == (node = calloc(1, sizeof(struct htmlnode)))) {
-		warn("calloc");
-		return(-1);
+	if ( ! (HTML_NOSPACE & h->flags)) {
+		/* Manage keeps! */
+		if ( ! (HTML_KEEP & h->flags)) {
+			if (HTML_PREKEEP & h->flags)
+				h->flags |= HTML_KEEP;
+			putchar(' ');
+		} else
+			printf("&#160;");
 	}
 
-	node->parent = q->last;
-	node->tok = tok;
-	node->ns = ns;
-
-	if (argc)  {
-		/* TODO: argv. */
-
-		assert(argv);
-		/* LINTED */
-		for (i = 0; ROFF_ARGMAX != argc[i]
-				&& i < ROFF_MAXLINEARG; i++) 
-			node->argc[i] = argc[i];
-		assert(i != ROFF_MAXLINEARG);
-	} 
-
+	assert(word);
+	if ( ! print_encode(h, word, 0))
+		if ( ! (h->flags & HTML_NONOSPACE))
+			h->flags &= ~HTML_NOSPACE;
+
+	/* 
+	 * Note that we don't process the pipe: the parser sees it as
+	 * punctuation, but we don't in terms of typography.
+	 */
+	if (word[0] && '\0' == word[1])
+		switch (word[0]) {
+		case('('):
+			/* FALLTHROUGH */
+		case('['):
+			h->flags |= HTML_NOSPACE;
+			break;
+		default:
+			break;
+		}
+}
 
-	q->last = node;
 
-	switch (ns) {
-	case (MD_NS_BLOCK):
-		if ( ! html_blocktagname(mbuf, args, tok, 
-					q, argc, argv, &res))
-			return(-1);
-		if ( ! html_blocktagargs(mbuf, args, tok, 
-					argc, argv, &res))
-			return(-1);
-		break;
-	case (MD_NS_BODY):
-		if ( ! html_bodytagname(mbuf, args, tok, 
-					q, argc, argv, &res))
-			return(-1);
-		if ( ! html_bodytagargs(mbuf, args, tok, 
-					argc, argv, &res))
-			return(-1);
-		break;
-	case (MD_NS_HEAD):
-		if ( ! html_headtagname(mbuf, args, tok, q,
-					argc, argv, &res))
-			return(-1);
-		if ( ! html_headtagargs(mbuf, args, tok, 
-					argc, argv, &res))
-			return(-1);
-		break;
-	default:
-		if ( ! html_inlinetagname(mbuf, args, tok, &res))
-			return(-1);
-		if ( ! html_inlinetagargs(mbuf, args, tok, 
-					argc, argv, &res))
-			return(-1);
-		break;
+void
+print_tagq(struct html *h, const struct tag *until)
+{
+	struct tag	*tag;
+
+	while ((tag = h->tags.head) != NULL) {
+		if (tag == h->metaf)
+			h->metaf = NULL;
+		print_ctag(h, tag->tag);
+		h->tags.head = tag->next;
+		free(tag);
+		if (until && tag == until)
+			return;
 	}
-
-	return((ssize_t)res);
 }
 
 
-static ssize_t 
-html_endtag(struct md_mbuf *mbuf, void *data,
-		const struct md_args *args, enum md_ns ns, int tok)
+void
+print_stagq(struct html *h, const struct tag *suntil)
 {
-	size_t		 res;
-	struct htmlq	*q;
-	struct htmlnode	*node;
-
-	assert(ns != MD_NS_DEFAULT);
-	res = 0;
-
-	assert(data);
-	q = (struct htmlq *)data;
-	node = q->last;
-
-	switch (ns) {
-	case (MD_NS_BLOCK):
-		if ( ! html_blocktagname(mbuf, args, tok, 
-					q, node->argc, 
-					(const char **)node->argv, &res))
-			return(-1);
-		break;
-	case (MD_NS_BODY):
-		if ( ! html_bodytagname(mbuf, args, tok, 
-					q, node->argc, 
-					(const char **)node->argv, &res))
-			return(-1);
-		break;
-	case (MD_NS_HEAD):
-		if ( ! html_headtagname(mbuf, args, tok, 
-					q, node->argc,
-					(const char **)node->argv, &res))
-			return(-1);
-		break;
-	default:
-		if ( ! html_inlinetagname(mbuf, args, tok, &res))
-			return(-1);
-		break;
+	struct tag	*tag;
+
+	while ((tag = h->tags.head) != NULL) {
+		if (suntil && tag == suntil)
+			return;
+		if (tag == h->metaf)
+			h->metaf = NULL;
+		print_ctag(h, tag->tag);
+		h->tags.head = tag->next;
+		free(tag);
 	}
+}
 
-	q->last = node->parent;
 
-	free(node);
+void
+bufinit(struct html *h)
+{
 
-	return((ssize_t)res);
+	h->buf[0] = '\0';
+	h->buflen = 0;
 }
 
 
-static int
-html_alloc(void **p)
+void
+bufcat_style(struct html *h, const char *key, const char *val)
 {
 
-	if (NULL == (*p = calloc(1, sizeof(struct htmlq)))) {
-		warn("calloc");
-		return(0);
-	}
-	return(1);
+	bufcat(h, key);
+	bufncat(h, ":", 1);
+	bufcat(h, val);
+	bufncat(h, ";", 1);
 }
 
 
-static void
-html_free(void *p)
+void
+bufcat(struct html *h, const char *p)
 {
-	struct htmlq	*q;
-	struct htmlnode	*n;
 
-	assert(p);
-	q = (struct htmlq *)p;
+	bufncat(h, p, strlen(p));
+}
+
 
-	/* LINTED */
-	while ((n = q->last)) {
-		q->last = n->parent;
-		free(n);
-	}
+void
+buffmt(struct html *h, const char *fmt, ...)
+{
+	va_list		 ap;
 
-	free(q);
+	va_start(ap, fmt);
+	(void)vsnprintf(h->buf + (int)h->buflen, 
+			BUFSIZ - h->buflen - 1, fmt, ap);
+	va_end(ap);
+	h->buflen = strlen(h->buf);
 }
 
 
-/* ARGSUSED */
-static ssize_t 
-html_beginhttp(struct md_mbuf *mbuf, 
-		const struct md_args *args, 
-		const char *buf, size_t sz)
+void
+bufncat(struct html *h, const char *p, size_t sz)
 {
-	size_t		 res;
-	struct html_pair pair;
 
-	res = 0;
-	pair.attr = HTML_ATTR_HREF;
-	pair.val = (char *)buf;
+	if (h->buflen + sz > BUFSIZ - 1)
+		sz = BUFSIZ - 1 - h->buflen;
 
-	if ( ! html_aput(mbuf, ML_OPEN, HTML_TAG_A, &res, 1, &pair))
-		return(-1);
-	return((ssize_t)res);
+	(void)strncat(h->buf, p, sz);
+	h->buflen += sz;
 }
 
 
-/* ARGSUSED */
-static ssize_t 
-html_endhttp(struct md_mbuf *mbuf, 
-		const struct md_args *args, 
-		const char *buf, size_t sz)
+void
+buffmt_includes(struct html *h, const char *name)
 {
-	size_t		 res;
+	const char	*p, *pp;
 
-	res = 0;
-	if ( ! html_tput(mbuf, ML_CLOSE, HTML_TAG_A, &res))
-		return(-1);
-	return((ssize_t)res);
+	pp = h->base_includes;
+	
+	while (NULL != (p = strchr(pp, '%'))) {
+		bufncat(h, pp, (size_t)(p - pp));
+		switch (*(p + 1)) {
+		case('I'):
+			bufcat(h, name);
+			break;
+		default:
+			bufncat(h, p, 2);
+			break;
+		}
+		pp = p + 2;
+	}
+	if (pp)
+		bufcat(h, pp);
 }
 
 
-/* ARGSUSED */
-static ssize_t 
-html_beginstring(struct md_mbuf *mbuf, 
-		const struct md_args *args, 
-		const char *buf, size_t sz)
+void
+buffmt_man(struct html *h, 
+		const char *name, const char *sec)
 {
+	const char	*p, *pp;
 
-	if (0 == strncmp(buf, "http://", 7))
-		return(html_beginhttp(mbuf, args, buf, sz));
-
-	return(0);
+	pp = h->base_man;
+	
+	/* LINTED */
+	while (NULL != (p = strchr(pp, '%'))) {
+		bufncat(h, pp, (size_t)(p - pp));
+		switch (*(p + 1)) {
+		case('S'):
+			bufcat(h, sec ? sec : "1");
+			break;
+		case('N'):
+			buffmt(h, name);
+			break;
+		default:
+			bufncat(h, p, 2);
+			break;
+		}
+		pp = p + 2;
+	}
+	if (pp)
+		bufcat(h, pp);
 }
 
 
-/* ARGSUSED */
-static ssize_t 
-html_endstring(struct md_mbuf *mbuf, 
-		const struct md_args *args, 
-		const char *buf, size_t sz)
+void
+bufcat_su(struct html *h, const char *p, const struct roffsu *su)
 {
-	
-	if (0 == strncmp(buf, "http://", 7))
-		return(html_endhttp(mbuf, args, buf, sz));
+	double		 v;
+	const char	*u;
+
+	v = su->scale;
 
-	return(0);
+	switch (su->unit) {
+	case (SCALE_CM):
+		u = "cm";
+		break;
+	case (SCALE_IN):
+		u = "in";
+		break;
+	case (SCALE_PC):
+		u = "pc";
+		break;
+	case (SCALE_PT):
+		u = "pt";
+		break;
+	case (SCALE_EM):
+		u = "em";
+		break;
+	case (SCALE_MM):
+		if (0 == (v /= 100))
+			v = 1;
+		u = "em";
+		break;
+	case (SCALE_EN):
+		u = "ex";
+		break;
+	case (SCALE_BU):
+		u = "ex";
+		break;
+	case (SCALE_VS):
+		u = "em";
+		break;
+	default:
+		u = "ex";
+		break;
+	}
+
+	/* 
+	 * XXX: the CSS spec isn't clear as to which types accept
+	 * integer or real numbers, so we just make them all decimals.
+	 */
+	buffmt(h, "%s: %.2f%s;", p, v, u);
 }
 
 
-int
-md_line_html(void *data, char *buf)
+void
+html_idcat(char *dst, const char *src, int sz)
 {
+	int		 ssz;
 
-	return(mlg_line((struct md_mlg *)data, buf));
-}
+	assert(sz);
 
+	/* Cf. <http://www.w3.org/TR/html4/types.html#h-6.2>. */
 
-int
-md_exit_html(void *data, int flush)
-{
+	for ( ; *dst != '\0' && sz; dst++, sz--)
+		/* Jump to end. */ ;
 
-	return(mlg_exit((struct md_mlg *)data, flush));
-}
+	assert(sz > 2);
 
+	/* We can't start with a number (bah). */
 
-void *
-md_init_html(const struct md_args *args,
-		struct md_mbuf *mbuf, const struct md_rbuf *rbuf)
-{
-	struct ml_cbs	 cbs;
-
-	cbs.ml_alloc = html_alloc;
-	cbs.ml_free = html_free;
-	cbs.ml_begintag = html_begintag;
-	cbs.ml_endtag = html_endtag;
-	cbs.ml_begin = html_begin;
-	cbs.ml_end = html_end;
-	cbs.ml_beginstring = html_beginstring;
-	cbs.ml_endstring = html_endstring;
-
-	return(mlg_alloc(args, rbuf, mbuf, &cbs));
+	*dst++ = 'x';
+	*dst = '\0';
+	sz--;
+
+	for ( ; *src != '\0' && sz > 1; src++) {
+		ssz = snprintf(dst, (size_t)sz, "%.2x", *src);
+		sz -= ssz;
+		dst += ssz;
+	}
 }