/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors: Jeffrey Stedfast <fejj@ximian.com>
*
* Copyright 2002 Ximian, Inc. (www.ximian.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include "string-utils.h"
#include "camel-mime-filter-enriched.h"
static struct {
char *enriched;
char *html;
} enriched_tags[] = {
{ "bold", "<b>" },
{ "/bold", "</b>" },
{ "italic", "<i>" },
{ "/italic", "</i>" },
{ "fixed", "<tt>" },
{ "/fixed", "</tt>" },
{ "smaller", "<font size=-1>" },
{ "/smaller", "</font>" },
{ "bigger", "<font size=+1>" },
{ "/bigger", "</font>" },
{ "underline", "<u>" },
{ "/underline", "</u>" },
{ "center", "<p align=center>" },
{ "/center", "</p>" },
{ "flushleft", "<p align=left>" },
{ "/flushleft", "</p>" },
{ "flushright", "<p align=right>" },
{ "/flushright", "</p>" },
{ "excerpt", "<blockquote>" },
{ "/excerpt", "</blockquote>" },
{ "paragraph", "<p>" },
{ "signature", "<address>" },
{ "/signature", "</address>" },
{ "comment", "<!-- " },
{ "/comment", " -->" },
{ "param", "<!-- " },
{ "/param", " -->" },
{ "np", "<hr>" }
};
#define NUM_ENRICHED_TAGS (sizeof (enriched_tags) / sizeof (enriched_tags[0]))
static GHashTable *enriched_hash = NULL;
static void camel_mime_filter_enriched_class_init (CamelMimeFilterEnrichedClass *klass);
static void camel_mime_filter_enriched_init (CamelMimeFilterEnriched *filter);
static void camel_mime_filter_enriched_finalize (CamelObject *obj);
static void filter_filter (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace);
static void filter_complete (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace);
static void filter_reset (CamelMimeFilter *filter);
static CamelMimeFilterClass *parent_class = NULL;
CamelType
camel_mime_filter_enriched_get_type (void)
{
static CamelType type = CAMEL_INVALID_TYPE;
if (type == CAMEL_INVALID_TYPE) {
type = camel_type_register (camel_mime_filter_get_type (),
"CamelMimeFilterEnriched",
sizeof (CamelMimeFilterEnriched),
sizeof (CamelMimeFilterEnrichedClass),
(CamelObjectClassInitFunc) camel_mime_filter_enriched_class_init,
NULL,
(CamelObjectInitFunc) camel_mime_filter_enriched_init,
(CamelObjectFinalizeFunc) camel_mime_filter_enriched_finalize);
}
return type;
}
static void
camel_mime_filter_enriched_class_init (CamelMimeFilterEnrichedClass *klass)
{
CamelMimeFilterClass *filter_class = (CamelMimeFilterClass *) klass;
int i;
parent_class = CAMEL_MIME_FILTER_CLASS (camel_mime_filter_get_type ());
filter_class->reset = filter_reset;
filter_class->filter = filter_filter;
filter_class->complete = filter_complete;
if (!enriched_hash) {
enriched_hash = g_hash_table_new (g_strcase_hash, g_strcase_equal);
for (i = 0; i < NUM_ENRICHED_TAGS; i++)
g_hash_table_insert (enriched_hash, enriched_tags[i].enriched,
enriched_tags[i].html);
}
}
static void
camel_mime_filter_enriched_finalize (CamelObject *obj)
{
;
}
static void
camel_mime_filter_enriched_init (CamelMimeFilterEnriched *filter)
{
filter->flags = 0;
filter->nofill = 0;
}
#define IS_RICHTEXT CAMEL_MIME_FILTER_ENRICHED_IS_RICHTEXT
static void
enriched_to_html (CamelMimeFilter *filter, char *in, size_t inlen, size_t prespace,
char **out, size_t *outlen, size_t *outprespace, gboolean flush)
{
CamelMimeFilterEnriched *enriched = (CamelMimeFilterEnriched *) filter;
const char *tag, *inend, *outend;
register const char *inptr;
register char *outptr;
camel_mime_filter_set_size (filter, inlen * 2 + 6, FALSE);
inptr = in;
inend = in + inlen;
outptr = filter->outbuf;
outend = filter->outbuf + filter->outsize;
loop:
do {
while (inptr < inend && outptr < outend && !strchr (" <>&\n", *inptr))
*outptr++ = *inptr++;
if (outptr == outend)
goto backup;
if ((inptr + 1) >= inend)
break;
switch (*inptr++) {
case ' ':
while (inptr < inend && (outptr + 7) < outend && *inptr == ' ') {
memcpy (outptr, " ", 6);
outptr += 6;
inptr++;
}
if (outptr < outend)
*outptr++ = ' ';
break;
case '\n':
if (!(enriched->flags & IS_RICHTEXT) && enriched->nofill <= 0) {
/* text/enriched */
while (inptr < inend && (outptr + 4) < outend && *inptr == '\n') {
memcpy (outptr, "<br>", 4);
outptr += 4;
inptr++;
}
} else {
/* text/richtext */
*outptr++ = ' ';
}
break;
case '>':
if ((outptr + 4) < outend) {
memcpy (outptr, ">", 4);
outptr += 4;
} else {
inptr--;
goto backup;
}
break;
case '&':
if ((outptr + 5) < outend) {
memcpy (outptr, "&", 5);
outptr += 5;
} else {
inptr--;
goto backup;
}
break;
case '<':
if (!(enriched->flags & IS_RICHTEXT)) {
/* text/enriched */
if (*inptr == '<') {
if ((outptr + 4) < outend) {
memcpy (outptr, "<", 4);
outptr += 4;
inptr++;
break;
} else {
inptr--;
goto backup;
}
}
} else {
/* text/richtext */
if ((inend - inptr) >= 3 && (outptr + 4) < outend) {
if (strncmp (inptr, "lt>", 3) == 0) {
memcpy (outptr, "<", 4);
outptr += 4;
inptr += 3;
break;
} else if (strncmp (inptr, "nl>", 3) == 0) {
memcpy (outptr, "<br>", 4);
outptr += 4;
inptr += 3;
break;
}
} else {
inptr--;
goto backup;
}
}
tag = inptr;
while (inptr < inend && *inptr != '>')
inptr++;
if (inptr == inend) {
inptr = tag - 1;
goto need_input;
}
if (!strncmp (tag, "nofill>", 7)) {
if ((outptr + 5) < outend) {
memcpy (outptr, "<pre>", 5);
enriched->nofill++;
outptr += 5;
} else {
inptr = tag - 1;
goto backup;
}
} else if (!strncmp (tag, "/nofill>", 8)) {
if ((outptr + 6) < outend) {
memcpy (outptr, "</pre>", 6);
enriched->nofill--;
outptr += 6;
} else {
inptr = tag - 1;
goto backup;
}
} else {
const char *html_tag;
char *enriched_tag;
int len;
enriched_tag = g_strndup (tag, (inptr - tag));
html_tag = g_hash_table_lookup (enriched_hash, enriched_tag);
g_free (enriched_tag);
if (html_tag) {
len = strlen (html_tag);
if ((outptr + len) < outend) {
memcpy (outptr, html_tag, len);
outptr += len;
} else {
inptr = tag - 1;
goto backup;
}
}
}
inptr++;
break;
default:
break;
}
} while (inptr < inend);
need_input:
/* the reason we ignore @flush here is because if there isn't
enough input to parse a tag, then there's nothing we can
do. */
if (inptr < inend)
camel_mime_filter_backup (filter, inptr, (unsigned) (inend - inptr));
*out = filter->outbuf;
*outlen = outptr - filter->outbuf;
*outprespace = filter->outpre;
return;
backup:
if (flush) {
size_t offset, grow;
grow = (inend - inptr) * 2 + 20;
offset = outptr - filter->outbuf;
camel_mime_filter_set_size (filter, filter->outsize + grow, TRUE);
outend = filter->outbuf + filter->outsize;
outptr = filter->outbuf + offset;
goto loop;
} else {
camel_mime_filter_backup (filter, inptr, (unsigned) (inend - inptr));
}
*out = filter->outbuf;
*outlen = outptr - filter->outbuf;
*outprespace = filter->outpre;
}
static void
filter_filter (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace)
{
enriched_to_html (filter, in, len, prespace, out, outlen, outprespace, FALSE);
}
static void
filter_complete (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace)
{
enriched_to_html (filter, in, len, prespace, out, outlen, outprespace, TRUE);
}
static void
filter_reset (CamelMimeFilter *filter)
{
CamelMimeFilterEnriched *enriched = (CamelMimeFilterEnriched *) filter;
enriched->nofill = 0;
}
/**
* camel_mime_filter_enriched_new:
* @flags:
*
* Creates a new CamelMimeFilterEnriched object.
*
* Returns a new CamelMimeFilter object.
**/
CamelMimeFilter *
camel_mime_filter_enriched_new (guint32 flags)
{
CamelMimeFilterEnriched *new;
new = (CamelMimeFilterEnriched *) camel_object_new (CAMEL_TYPE_MIME_FILTER_ENRICHED);
new->flags = flags;
return CAMEL_MIME_FILTER (new);
}
