latex.c (22238B)
/* $Id$ */
/*
* Copyright (c) 2020--2021 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.
*/
#include "config.h"
#if HAVE_SYS_QUEUE
# include <sys/queue.h>
#endif
#include <assert.h>
#include <ctype.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "lowdown.h"
#include "extern.h"
struct latex {
unsigned int oflags; /* same as in lowdown_opts */
struct hentryq headers_used; /* headers we've seen */
ssize_t headers_offs; /* header offset */
size_t footsz; /* current footnote */
};
/*
* Return zero on failure, non-zero on success.
*/
static int
rndr_escape_text(struct lowdown_buf *ob, const char *data, size_t sz)
{
size_t i;
for (i = 0; i < sz; i++)
switch (data[i]) {
case '&':
case '%':
case '$':
case '#':
case '_':
case '{':
case '}':
if (!hbuf_putc(ob, '\\'))
return 0;
if (!hbuf_putc(ob, data[i]))
return 0;
break;
case '~':
if (!HBUF_PUTSL(ob, "\\textasciitilde{}"))
return 0;
break;
case '^':
if (!HBUF_PUTSL(ob, "\\textasciicircum{}"))
return 0;
break;
case '\\':
if (!HBUF_PUTSL(ob, "\\textbackslash{}"))
return 0;
break;
default:
if (!hbuf_putc(ob, data[i]))
return 0;
break;
}
return 1;
}
/*
* Return zero on failure, non-zero on success.
*/
static int
rndr_escape(struct lowdown_buf *ob, const struct lowdown_buf *dat)
{
return rndr_escape_text(ob, dat->data, dat->size);
}
static int
rndr_autolink(struct lowdown_buf *ob,
const struct rndr_autolink *param)
{
if (param->link.size == 0)
return 1;
if (!HBUF_PUTSL(ob, "\\url{"))
return 0;
if (param->type == HALINK_EMAIL && !HBUF_PUTSL(ob, "mailto:"))
return 0;
if (!rndr_escape(ob, ¶m->link))
return 0;
return HBUF_PUTSL(ob, "}");
}
static int
rndr_entity(struct lowdown_buf *ob,
const struct rndr_entity *param)
{
const char *tex;
unsigned char texflags;
tex = entity_find_tex(¶m->text, &texflags);
if (tex == NULL)
return rndr_escape(ob, ¶m->text);
if ((texflags & TEX_ENT_MATH) && (texflags & TEX_ENT_ASCII))
return hbuf_printf(ob, "$\\mathrm{%s}$", tex);
if (texflags & TEX_ENT_ASCII)
return hbuf_puts(ob, tex);
if (texflags & TEX_ENT_MATH)
return hbuf_printf(ob, "$\\mathrm{\\%s}$", tex);
return hbuf_printf(ob, "\\%s", tex);
}
static int
rndr_blockcode(struct lowdown_buf *ob,
const struct rndr_blockcode *param)
{
if (ob->size && !HBUF_PUTSL(ob, "\n"))
return 0;
#if 0
HBUF_PUTSL(ob, "\\begin{lstlisting}");
if (lang->size) {
HBUF_PUTSL(ob, "[language=");
rndr_escape(ob, lang);
HBUF_PUTSL(ob, "]\n\n");
} else
HBUF_PUTSL(ob, "\n");
#else
HBUF_PUTSL(ob, "\\begin{verbatim}\n");
#endif
if (!hbuf_putb(ob, ¶m->text))
return 0;
#if 0
HBUF_PUTSL(ob, "\\end{lstlisting}\n");
#else
return HBUF_PUTSL(ob, "\\end{verbatim}\n");
#endif
}
static int
rndr_definition_title(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
if (!HBUF_PUTSL(ob, "\\item ["))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "] ");
}
static int
rndr_definition(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
if (!HBUF_PUTSL(ob, "\\begin{description}\n"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "\\end{description}\n");
}
static int
rndr_blockquote(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
if (ob->size && !HBUF_PUTSL(ob, "\n"))
return 0;
if (!HBUF_PUTSL(ob, "\\begin{quotation}\n"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "\\end{quotation}\n");
}
static int
rndr_codespan(struct lowdown_buf *ob,
const struct rndr_codespan *param)
{
#if 0
HBUF_PUTSL(ob, "\\lstinline{");
hbuf_putb(ob, text);
#else
if (!HBUF_PUTSL(ob, "\\texttt{"))
return 0;
if (!rndr_escape(ob, ¶m->text))
return 0;
#endif
return HBUF_PUTSL(ob, "}");
}
static int
rndr_triple_emphasis(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
if (!HBUF_PUTSL(ob, "\\textbf{\\emph{"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "}}");
}
static int
rndr_double_emphasis(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
if (!HBUF_PUTSL(ob, "\\textbf{"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "}");
}
static int
rndr_emphasis(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
if (!HBUF_PUTSL(ob, "\\emph{"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "}");
}
static int
rndr_highlight(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
if (!HBUF_PUTSL(ob, "\\underline{"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "}");
}
static int
rndr_linebreak(struct lowdown_buf *ob)
{
return HBUF_PUTSL(ob, "\\linebreak\n");
}
static int
rndr_header(struct lowdown_buf *ob, const struct lowdown_buf *content,
const struct lowdown_node *n, struct latex *st)
{
const char *type;
ssize_t level;
struct lowdown_buf *buf = NULL;
const struct lowdown_buf *id;
int rc = 0;
if (n->rndr_header.attr_id.size) {
if ((buf = hbuf_new(32)) == NULL)
goto out;
if (!rndr_escape(buf, &n->rndr_header.attr_id))
goto out;
id = buf;
} else {
id = hbuf_id(NULL, n, &st->headers_used);
if (id == NULL)
goto out;
}
if (ob->size && !HBUF_PUTSL(ob, "\n"))
goto out;
if (!HBUF_PUTSL(ob, "\\hypertarget{"))
goto out;
if (!hbuf_putb(ob, id))
goto out;
if (!HBUF_PUTSL(ob, "}{%\n"))
goto out;
level = (ssize_t)n->rndr_header.level + st->headers_offs;
if (level < 1)
level = 1;
switch (level) {
case 1:
type = "\\section";
break;
case 2:
type = "\\subsection";
break;
case 3:
type = "\\subsubsection";
break;
case 4:
type = "\\paragraph";
break;
default:
type = "\\subparagraph";
break;
}
if (!hbuf_puts(ob, type))
goto out;
if (!(st->oflags & LOWDOWN_LATEX_NUMBERED) &&
!HBUF_PUTSL(ob, "*"))
goto out;
if (!HBUF_PUTSL(ob, "{"))
goto out;
if (!hbuf_putb(ob, content))
goto out;
if (!HBUF_PUTSL(ob, "}\\label{"))
goto out;
if (!hbuf_putb(ob, id))
goto out;
if (!HBUF_PUTSL(ob, "}}\n"))
goto out;
rc = 1;
out:
hbuf_free(buf);
return rc;
}
static int
rndr_link(struct lowdown_buf *ob,
const struct lowdown_buf *content,
const struct rndr_link *param)
{
int loc;
loc = param->link.size > 0 &&
param->link.data[0] == '#';
if (param->attr_id.size > 0) {
if (!HBUF_PUTSL(ob, "\\hypertarget{"))
return 0;
if (!hbuf_putb(ob, ¶m->attr_id))
return 0;
if (!HBUF_PUTSL(ob, "}{%\n"))
return 0;
}
if (loc && !HBUF_PUTSL(ob, "\\hyperlink{"))
return 0;
else if (!loc && !HBUF_PUTSL(ob, "\\href{"))
return 0;
if (loc && !rndr_escape_text
(ob, ¶m->link.data[1], param->link.size - 1))
return 0;
else if (!loc && !rndr_escape(ob, ¶m->link))
return 0;
if (!HBUF_PUTSL(ob, "}{"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
if (param->attr_id.size > 0 && !HBUF_PUTSL(ob, "}"))
return 0;
return HBUF_PUTSL(ob, "}");
}
static int
rndr_list(struct lowdown_buf *ob,
const struct lowdown_buf *content,
const struct rndr_list *param)
{
const char *type;
if (ob->size && !hbuf_putc(ob, '\n'))
return 0;
/* TODO: HLIST_FL_ORDERED and param->start */
type = (param->flags & HLIST_FL_ORDERED) ?
"enumerate" : "itemize";
if (!hbuf_printf(ob, "\\begin{%s}\n", type))
return 0;
if (!(param->flags & HLIST_FL_BLOCK) &&
!HBUF_PUTSL(ob, "\\itemsep -0.2em\n"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return hbuf_printf(ob, "\\end{%s}\n", type);
}
static int
rndr_listitem(struct lowdown_buf *ob,
const struct lowdown_buf *content,
const struct rndr_listitem *param)
{
size_t size;
/* Only emit <li> if we're not a <dl> list. */
if (!(param->flags & HLIST_FL_DEF)) {
if (!HBUF_PUTSL(ob, "\\item"))
return 0;
if ((param->flags & HLIST_FL_CHECKED) &&
!HBUF_PUTSL(ob, "[$\\rlap{$\\checkmark$}\\square$]"))
return 0;
if ((param->flags & HLIST_FL_UNCHECKED) &&
!HBUF_PUTSL(ob, "[$\\square$]"))
return 0;
if (!HBUF_PUTSL(ob, " "))
return 0;
}
/* Cut off any trailing space. */
if ((size = content->size) > 0) {
while (size && content->data[size - 1] == '\n')
size--;
if (!hbuf_put(ob, content->data, size))
return 0;
}
return HBUF_PUTSL(ob, "\n");
}
static int
rndr_paragraph(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
size_t i = 0;
if (content->size == 0)
return 1;
while (i < content->size &&
isspace((unsigned char)content->data[i]))
i++;
if (i == content->size)
return 1;
if (!HBUF_PUTSL(ob, "\n"))
return 0;
if (!hbuf_put(ob, content->data + i, content->size - i))
return 0;
return HBUF_PUTSL(ob, "\n");
}
static int
rndr_raw_block(struct lowdown_buf *ob,
const struct rndr_blockhtml *param,
const struct latex *st)
{
size_t org = 0, sz = param->text.size;
if (st->oflags & LOWDOWN_LATEX_SKIP_HTML)
return 1;
while (sz > 0 && param->text.data[sz - 1] == '\n')
sz--;
while (org < sz && param->text.data[org] == '\n')
org++;
if (org >= sz)
return 1;
if (ob->size && !HBUF_PUTSL(ob, "\n"))
return 0;
if (!HBUF_PUTSL(ob, "\\begin{verbatim}\n"))
return 0;
if (!hbuf_put(ob, param->text.data + org, sz - org))
return 0;
return HBUF_PUTSL(ob, "\\end{verbatim}\n");
}
static int
rndr_hrule(struct lowdown_buf *ob)
{
if (ob->size && !hbuf_putc(ob, '\n'))
return 0;
return HBUF_PUTSL(ob, "\\noindent\\hrulefill\n");
}
static int
rndr_image(struct lowdown_buf *ob,
const struct rndr_image *param)
{
const char *cp;
char dimbuf[32];
unsigned int x, y;
float pct;
int rc = 0;
/*
* Scan in our dimensions, if applicable.
* It's unreasonable for them to be over 32 characters, so use
* that as a cap to the size.
*/
if (param->dims.size &&
param->dims.size < sizeof(dimbuf) - 1) {
memset(dimbuf, 0, sizeof(dimbuf));
memcpy(dimbuf, param->dims.data, param->dims.size);
rc = sscanf(dimbuf, "%ux%u", &x, &y);
}
/* Extended attributes override dimensions. */
if (!HBUF_PUTSL(ob, "\\includegraphics["))
return 0;
if (param->attr_width.size || param->attr_height.size) {
if (param->attr_width.size &&
param->attr_width.size < sizeof(dimbuf) - 1) {
memset(dimbuf, 0, sizeof(dimbuf));
memcpy(dimbuf, param->attr_width.data,
param->attr_width.size);
/* Try to parse as a percentage. */
if (sscanf(dimbuf, "%e%%", &pct) == 1) {
if (!hbuf_printf(ob, "width=%.2f"
"\\linewidth", pct / 100.0))
return 0;
} else {
if (!hbuf_printf(ob, "width=%.*s",
(int)param->attr_width.size,
param->attr_width.data))
return 0;
}
}
if (param->attr_height.size &&
param->attr_height.size < sizeof(dimbuf) - 1) {
if (param->attr_width.size &&
!HBUF_PUTSL(ob, ", "))
return 0;
if (!hbuf_printf(ob, "height=%.*s",
(int)param->attr_height.size,
param->attr_height.data))
return 0;
}
} else if (rc > 0) {
if (!hbuf_printf(ob, "width=%upx", x))
return 0;
if (rc > 1 && !hbuf_printf(ob, ", height=%upx", y))
return 0;
}
if (!HBUF_PUTSL(ob, "]{"))
return 0;
cp = memrchr(param->link.data, '.', param->link.size);
if (cp != NULL) {
if (!HBUF_PUTSL(ob, "{"))
return 0;
if (!rndr_escape_text
(ob, param->link.data, cp - param->link.data))
return 0;
if (!HBUF_PUTSL(ob, "}"))
return 0;
if (!rndr_escape_text(ob, cp,
param->link.size - (cp - param->link.data)))
return 0;
} else {
if (!rndr_escape(ob, ¶m->link))
return 0;
}
return HBUF_PUTSL(ob, "}");
}
static int
rndr_raw_html(struct lowdown_buf *ob,
const struct rndr_raw_html *param,
const struct latex *st)
{
if (st->oflags & LOWDOWN_LATEX_SKIP_HTML)
return 1;
return rndr_escape(ob, ¶m->text);
}
static int
rndr_table(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
/* Open the table in rndr_table_header. */
if (ob->size && !hbuf_putc(ob, '\n'))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "\\end{longtable}\n");
}
static int
rndr_table_header(struct lowdown_buf *ob,
const struct lowdown_buf *content,
const struct rndr_table_header *param)
{
size_t i;
char align;
int fl;
if (!HBUF_PUTSL(ob, "\\begin{longtable}[]{"))
return 0;
for (i = 0; i < param->columns; i++) {
fl = param->flags[i] & HTBL_FL_ALIGNMASK;
if (fl == HTBL_FL_ALIGN_CENTER)
align = 'c';
else if (fl == HTBL_FL_ALIGN_RIGHT)
align = 'r';
else
align = 'l';
if (!hbuf_putc(ob, align))
return 0;
}
if (!HBUF_PUTSL(ob, "}\n"))
return 0;
return hbuf_putb(ob, content);
}
static int
rndr_tablecell(struct lowdown_buf *ob,
const struct lowdown_buf *content,
const struct rndr_table_cell *param)
{
if (!hbuf_putb(ob, content))
return 0;
return (param->col < param->columns - 1) ?
HBUF_PUTSL(ob, " & ") :
HBUF_PUTSL(ob, " \\\\\n");
}
static int
rndr_superscript(struct lowdown_buf *ob,
const struct lowdown_buf *content)
{
if (!HBUF_PUTSL(ob, "\\textsuperscript{"))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "}");
}
static int
rndr_normal_text(struct lowdown_buf *ob,
const struct rndr_normal_text *param)
{
return rndr_escape(ob, ¶m->text);
}
static int
rndr_footnote_ref(struct lowdown_buf *ob,
const struct lowdown_buf *content, struct latex *st)
{
if (!hbuf_printf(ob, "\\footnote[%zu]{", ++st->footsz))
return 0;
if (!hbuf_putb(ob, content))
return 0;
return HBUF_PUTSL(ob, "}\n");
}
static int
rndr_math(struct lowdown_buf *ob,
const struct rndr_math *param)
{
if (param->blockmode && !HBUF_PUTSL(ob, "\\["))
return 0;
else if (!param->blockmode && !HBUF_PUTSL(ob, "\\("))
return 0;
if (!hbuf_putb(ob, ¶m->text))
return 0;
if (param->blockmode && !HBUF_PUTSL(ob, "\\]"))
return 0;
else if (!param->blockmode && !HBUF_PUTSL(ob, "\\)"))
return 0;
return 1;
}
static int
rndr_doc_footer(struct lowdown_buf *ob, const struct latex *st)
{
if (st->oflags & LOWDOWN_STANDALONE)
return HBUF_PUTSL(ob, "\\end{document}\n");
return 1;
}
static int
rndr_doc_header(struct lowdown_buf *ob,
const struct lowdown_metaq *mq, const struct latex *st)
{
const struct lowdown_meta *m;
const char *author = NULL, *title = NULL,
*affil = NULL, *date = NULL,
*rcsauthor = NULL,
*rcsdate = NULL;
if (!(st->oflags & LOWDOWN_STANDALONE))
return 1;
if (!HBUF_PUTSL(ob,
"% Options for packages loaded elsewhere\n"
"\\PassOptionsToPackage{unicode}{hyperref}\n"
"\\PassOptionsToPackage{hyphens}{url}\n"
"%\n"
"\\documentclass[11pt,a4paper]{article}\n"
"\\usepackage{amsmath,amssymb}\n"
"\\usepackage{lmodern}\n"
"\\usepackage{iftex}\n"
"\\ifPDFTeX\n"
" \\usepackage[T1]{fontenc}\n"
" \\usepackage[utf8]{inputenc}\n"
" \\usepackage{textcomp} % provide euro and other symbols\n"
"\\else % if luatex or xetex\n"
" \\usepackage{unicode-math}\n"
" \\defaultfontfeatures{Scale=MatchLowercase}\n"
" \\defaultfontfeatures[\\rmfamily]{Ligatures=TeX,Scale=1}\n"
"\\fi\n"
"\\usepackage{xcolor}\n"
"\\usepackage{graphicx}\n"
"\\usepackage{longtable}\n"
"\\usepackage{hyperref}\n"
"\\begin{document}\n"))
return 0;
TAILQ_FOREACH(m, mq, entries)
if (strcasecmp(m->key, "author") == 0)
author = m->value;
else if (strcasecmp(m->key, "affiliation") == 0)
affil = m->value;
else if (strcasecmp(m->key, "date") == 0)
date = m->value;
else if (strcasecmp(m->key, "rcsauthor") == 0)
rcsauthor = rcsauthor2str(m->value);
else if (strcasecmp(m->key, "rcsdate") == 0)
rcsdate = rcsdate2str(m->value);
else if (strcasecmp(m->key, "title") == 0)
title = m->value;
/* Overrides. */
if (title == NULL)
title = "Untitled article";
if (rcsauthor != NULL)
author = rcsauthor;
if (rcsdate != NULL)
date = rcsdate;
if (!hbuf_printf(ob, "\\title{%s}\n", title))
return 0;
if (author != NULL) {
if (!hbuf_printf(ob, "\\author{%s", author))
return 0;
if (affil != NULL &&
!hbuf_printf(ob, " \\\\ %s", affil))
return 0;
if (!HBUF_PUTSL(ob, "}\n"))
return 0;
}
if (date != NULL && !hbuf_printf(ob, "\\date{%s}\n", date))
return 0;
return HBUF_PUTSL(ob, "\\maketitle\n");
}
static int
rndr_meta(struct lowdown_buf *ob,
const struct lowdown_buf *content,
struct lowdown_metaq *mq,
const struct lowdown_node *n, struct latex *st)
{
struct lowdown_meta *m;
ssize_t val;
const char *ep;
if ((m = calloc(1, sizeof(struct lowdown_meta))) == NULL)
return 0;
TAILQ_INSERT_TAIL(mq, m, entries);
m->key = strndup(n->rndr_meta.key.data,
n->rndr_meta.key.size);
if (m->key == NULL)
return 0;
m->value = strndup(content->data, content->size);
if (m->value == NULL)
return 0;
if (strcmp(m->key, "shiftheadinglevelby") == 0) {
val = (ssize_t)strtonum
(m->value, -100, 100, &ep);
if (ep == NULL)
st->headers_offs = val + 1;
} else if (strcmp(m->key, "baseheaderlevel") == 0) {
val = (ssize_t)strtonum
(m->value, 1, 100, &ep);
if (ep == NULL)
st->headers_offs = val;
}
return 1;
}
static int
rndr(struct lowdown_buf *ob,
struct lowdown_metaq *mq, void *arg,
const struct lowdown_node *n)
{
struct lowdown_buf *tmp;
struct latex *st = arg;
const struct lowdown_node *child;
int ret = 0;
if ((tmp = hbuf_new(64)) == NULL)
return 0;
TAILQ_FOREACH(child, &n->children, entries)
if (!rndr(tmp, mq, st, child))
goto out;
/*
* These elements can be put in either a block or an inline
* context, so we're safe to just use them and forget.
*/
if (n->chng == LOWDOWN_CHNG_INSERT &&
!HBUF_PUTSL(ob, "{\\color{blue} "))
goto out;
if (n->chng == LOWDOWN_CHNG_DELETE &&
!HBUF_PUTSL(ob, "{\\color{red} "))
goto out;
switch (n->type) {
case LOWDOWN_BLOCKCODE:
if (!rndr_blockcode(ob, &n->rndr_blockcode))
return 0;
break;
case LOWDOWN_BLOCKQUOTE:
if (!rndr_blockquote(ob, tmp))
return 0;
break;
case LOWDOWN_DEFINITION:
if (!rndr_definition(ob, tmp))
return 0;
break;
case LOWDOWN_DEFINITION_TITLE:
if (!rndr_definition_title(ob, tmp))
return 0;
break;
case LOWDOWN_DOC_HEADER:
if (!rndr_doc_header(ob, mq, st))
return 0;
break;
case LOWDOWN_META:
if (n->chng != LOWDOWN_CHNG_DELETE &&
!rndr_meta(ob, tmp, mq, n, st))
return 0;
break;
case LOWDOWN_HEADER:
if (!rndr_header(ob, tmp, n, st))
return 0;
break;
case LOWDOWN_HRULE:
if (!rndr_hrule(ob))
return 0;
break;
case LOWDOWN_LIST:
if (!rndr_list(ob, tmp, &n->rndr_list))
return 0;
break;
case LOWDOWN_LISTITEM:
if (!rndr_listitem(ob, tmp, &n->rndr_listitem))
return 0;
break;
case LOWDOWN_PARAGRAPH:
if (!rndr_paragraph(ob, tmp))
return 0;
break;
case LOWDOWN_TABLE_BLOCK:
if (!rndr_table(ob, tmp))
return 0;
break;
case LOWDOWN_TABLE_HEADER:
if (!rndr_table_header(ob, tmp, &n->rndr_table_header))
return 0;
break;
case LOWDOWN_TABLE_CELL:
if (!rndr_tablecell(ob, tmp, &n->rndr_table_cell))
return 0;
break;
case LOWDOWN_BLOCKHTML:
if (!rndr_raw_block(ob, &n->rndr_blockhtml, st))
return 0;
break;
case LOWDOWN_LINK_AUTO:
if (!rndr_autolink(ob, &n->rndr_autolink))
return 0;
break;
case LOWDOWN_CODESPAN:
if (!rndr_codespan(ob, &n->rndr_codespan))
return 0;
break;
case LOWDOWN_DOUBLE_EMPHASIS:
if (!rndr_double_emphasis(ob, tmp))
return 0;
break;
case LOWDOWN_EMPHASIS:
if (!rndr_emphasis(ob, tmp))
return 0;
break;
case LOWDOWN_HIGHLIGHT:
if (!rndr_highlight(ob, tmp))
return 0;
break;
case LOWDOWN_IMAGE:
if (!rndr_image(ob, &n->rndr_image))
return 0;
break;
case LOWDOWN_LINEBREAK:
if (!rndr_linebreak(ob))
return 0;
break;
case LOWDOWN_LINK:
if (!rndr_link(ob, tmp, &n->rndr_link))
return 0;
break;
case LOWDOWN_TRIPLE_EMPHASIS:
if (!rndr_triple_emphasis(ob, tmp))
return 0;
break;
case LOWDOWN_SUPERSCRIPT:
if (!rndr_superscript(ob, tmp))
return 0;
break;
case LOWDOWN_FOOTNOTE:
if (!rndr_footnote_ref(ob, tmp, st))
return 0;
break;
case LOWDOWN_MATH_BLOCK:
if (!rndr_math(ob, &n->rndr_math))
return 0;
break;
case LOWDOWN_RAW_HTML:
if (!rndr_raw_html(ob, &n->rndr_raw_html, st))
return 0;
break;
case LOWDOWN_NORMAL_TEXT:
if (!rndr_normal_text(ob, &n->rndr_normal_text))
return 0;
break;
case LOWDOWN_ENTITY:
if (!rndr_entity(ob, &n->rndr_entity))
return 0;
break;
case LOWDOWN_ROOT:
if (!hbuf_putb(ob, tmp))
return 0;
if (!rndr_doc_footer(ob, st))
return 0;
break;
default:
if (!hbuf_putb(ob, tmp))
return 0;
break;
}
if ((n->chng == LOWDOWN_CHNG_INSERT ||
n->chng == LOWDOWN_CHNG_DELETE) && !HBUF_PUTSL(ob, "}"))
goto out;
ret = 1;
out:
hbuf_free(tmp);
return ret;
}
int
lowdown_latex_rndr(struct lowdown_buf *ob,
void *arg, const struct lowdown_node *n)
{
struct latex *st = arg;
struct lowdown_metaq metaq;
int rc;
TAILQ_INIT(&st->headers_used);
TAILQ_INIT(&metaq);
st->headers_offs = 1;
st->footsz = 0;
rc = rndr(ob, &metaq, st, n);
lowdown_metaq_free(&metaq);
hentryq_clear(&st->headers_used);
return rc;
}
void *
lowdown_latex_new(const struct lowdown_opts *opts)
{
struct latex *p;
if ((p = calloc(1, sizeof(struct latex))) == NULL)
return NULL;
p->oflags = opts == NULL ? 0 : opts->oflags;
return p;
}
void
lowdown_latex_free(void *arg)
{
free(arg);
}