minix/commands/mdocml/html.c

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2010-06-26 04:20:06 +02:00
/* $Id: html.c,v 1.102 2010/06/19 20:46:27 kristaps Exp $ */
/*
* Copyright (c) 2008, 2009 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.
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <assert.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 "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. */
};
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 */
};
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 void print_spec(struct html *, const char *, size_t);
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 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);
}
h->type = type;
h->tags.head = NULL;
h->ords.head = NULL;
h->symtab = chars_init(CHARS_HTML);
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(h);
}
void *
html_alloc(char *outopts)
{
return(ml_alloc(outopts, HTML_HTML_4_01_STRICT));
}
void *
xhtml_alloc(char *outopts)
{
return(ml_alloc(outopts, HTML_XHTML_1_0_STRICT));
}
void
html_free(void *p)
{
struct tag *tag;
struct ord *ord;
struct html *h;
h = (struct html *)p;
while ((ord = h->ords.head) != NULL) {
h->ords.head = ord->next;
free(ord);
}
while ((tag = h->tags.head) != NULL) {
h->tags.head = tag->next;
free(tag);
}
if (h->symtab)
chars_free(h->symtab);
free(h);
}
void
print_gen_head(struct html *h)
{
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);
}
}
static void
print_spec(struct html *h, const char *p, size_t len)
{
const char *rhs;
size_t sz;
rhs = chars_a2ascii(h->symtab, p, len, &sz);
if (NULL == rhs)
return;
fwrite(rhs, 1, sz, stdout);
}
static void
print_res(struct html *h, const char *p, size_t len)
{
const char *rhs;
size_t sz;
rhs = chars_a2res(h->symtab, p, len, &sz);
if (NULL == rhs)
return;
fwrite(rhs, 1, sz, stdout);
}
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);
PAIR_CLASS_INIT(&tag, htmlfonts[font]);
h->metaf = print_otag(h, TAG_SPAN, 1, &tag);
return(h->metaf);
}
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 */
}
(void)print_ofont(h, font);
}
static int
print_encode(struct html *h, const char *p, int norecurse)
{
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;
seq = ++p;
len = a2roffdeco(&deco, &seq, &sz);
switch (deco) {
case (DECO_RESERVED):
print_res(h, seq, sz);
break;
case (DECO_SPECIAL):
print_spec(h, seq, sz);
break;
case (DECO_PREVIOUS):
/* FALLTHROUGH */
case (DECO_BOLD):
/* FALLTHROUGH */
case (DECO_ITALIC):
/* FALLTHROUGH */
case (DECO_ROMAN):
if (norecurse)
break;
print_metaf(h, deco);
break;
default:
break;
}
p += len - 1;
if (DECO_NOSPACE == deco && '\0' == *(p + 1))
nospace = 1;
}
return(nospace);
}
static void
print_attr(struct html *h, const char *key, const char *val)
{
printf(" %s=\"", key);
(void)print_encode(h, val, 1);
putchar('\"');
}
struct tag *
print_otag(struct html *h, enum htmltag tag,
int sz, const struct htmlpair *p)
{
int i;
struct tag *t;
/* Push this tags onto the stack of open scopes. */
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))
putchar(' ');
/* 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);
/* Add non-overridable attributes. */
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");
}
/* 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;
}
putchar('>');
h->flags |= HTML_NOSPACE;
return(t);
}
static void
print_ctag(struct html *h, enum htmltag tag)
{
printf("</%s>", htmltags[tag].name);
if (HTML_CLRLINE & htmltags[tag].flags) {
h->flags |= HTML_NOSPACE;
putchar('\n');
}
}
void
print_gen_decls(struct html *h)
{
print_xmltype(h);
print_doctype(h);
}
static void
print_xmltype(struct html *h)
{
if (HTML_XHTML_1_0_STRICT == h->type)
printf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
}
static void
print_doctype(struct html *h)
{
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;
default:
name = "html";
doctype = "-//W3C//DTD XHTML 1.0 Strict//EN";
dtd = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";
break;
}
printf("<!DOCTYPE %s PUBLIC \"%s\" \"%s\">\n",
name, doctype, dtd);
}
void
print_text(struct html *h, const char *p)
{
if (*p && 0 == *(p + 1))
switch (*p) {
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 ( ! (h->flags & HTML_NOSPACE))
putchar(' ');
assert(p);
if ( ! print_encode(h, p, 0))
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 (*p && 0 == *(p + 1))
switch (*p) {
case('('):
/* FALLTHROUGH */
case('['):
h->flags |= HTML_NOSPACE;
break;
default:
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;
}
}
void
print_stagq(struct html *h, const struct tag *suntil)
{
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);
}
}
void
bufinit(struct html *h)
{
h->buf[0] = '\0';
h->buflen = 0;
}
void
bufcat_style(struct html *h, const char *key, const char *val)
{
bufcat(h, key);
bufncat(h, ":", 1);
bufcat(h, val);
bufncat(h, ";", 1);
}
void
bufcat(struct html *h, const char *p)
{
bufncat(h, p, strlen(p));
}
void
buffmt(struct html *h, const char *fmt, ...)
{
va_list ap;
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);
}
void
bufncat(struct html *h, const char *p, size_t sz)
{
if (h->buflen + sz > BUFSIZ - 1)
sz = BUFSIZ - 1 - h->buflen;
(void)strncat(h->buf, p, sz);
h->buflen += sz;
}
void
buffmt_includes(struct html *h, const char *name)
{
const char *p, *pp;
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);
}
void
buffmt_man(struct html *h,
const char *name, const char *sec)
{
const char *p, *pp;
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);
}
void
bufcat_su(struct html *h, const char *p, const struct roffsu *su)
{
double v;
const char *u;
v = su->scale;
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;
}
if (su->pt)
buffmt(h, "%s: %f%s;", p, v, u);
else
/* LINTED */
buffmt(h, "%s: %d%s;", p, (int)v, u);
}
void
html_idcat(char *dst, const char *src, int sz)
{
int ssz;
assert(sz);
/* Cf. <http://www.w3.org/TR/html4/types.html#h-6.2>. */
for ( ; *dst != '\0' && sz; dst++, sz--)
/* Jump to end. */ ;
assert(sz > 2);
/* We can't start with a number (bah). */
*dst++ = 'x';
*dst = '\0';
sz--;
for ( ; *src != '\0' && sz > 1; src++) {
ssz = snprintf(dst, (size_t)sz, "%.2x", *src);
sz -= ssz;
dst += ssz;
}
}