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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Copyright (C) 2000 Helix Code, Inc.
*
* Authors: Jeffrey Stedfast <fejj@helixcode.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ctype.h>
#include "camel-mime-filter-linewrap.h"
static void filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace);
static void complete (CamelMimeFilter *f, char *in, size_t len,
size_t prespace, char **out, size_t *outlen,
size_t *outprespace);
static void reset (CamelMimeFilter *f);
static void
camel_mime_filter_linewrap_class_init (CamelMimeFilterLinewrapClass *klass)
{
CamelMimeFilterClass *mime_filter_class =
(CamelMimeFilterClass *) klass;
mime_filter_class->filter = filter;
mime_filter_class->complete = complete;
mime_filter_class->reset = reset;
}
CamelType
camel_mime_filter_linewrap_get_type (void)
{
static CamelType type = CAMEL_INVALID_TYPE;
if (type == CAMEL_INVALID_TYPE) {
type = camel_type_register (camel_mime_filter_get_type(), "CamelMimeFilterLinewrap",
sizeof (CamelMimeFilterLinewrap),
sizeof (CamelMimeFilterLinewrapClass),
(CamelObjectClassInitFunc) camel_mime_filter_linewrap_class_init,
NULL,
NULL,
NULL);
}
return type;
}
static void
filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace)
{
CamelMimeFilterLinewrap *linewrap = (CamelMimeFilterLinewrap *)f;
char *inend, *last, *p, *q;
int nchars = linewrap->nchars;
/* we'll be adding chars here so we need a bigger buffer */
camel_mime_filter_set_size (f, 3 * len, FALSE);
p = in;
q = f->outbuf;
inend = in + len;
while (p < inend) {
if (*p == '\n') {
last = q;
*q++ = *p++;
nchars = 0;
} else if (isspace (*p)) {
last = q;
if (nchars >= linewrap->wrap_len) {
*q++ = '\n';
p++;
nchars = 0;
} else {
*q++ = *p++;
}
} else {
*q++ = *p++;
nchars++;
}
/* line is getting way too long, we must force a wrap here */
if (nchars >= (linewrap->max_len - 1) && *p != '\n') {
*q++ = '\n';
*q++ = linewrap->indent;
nchars = 0;
}
}
linewrap->nchars = nchars;
*out = f->outbuf;
*outlen = q - f->outbuf;
*outprespace = f->outpre;
}
static void
complete (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace)
{
if (len)
filter (f, in, len, prespace, out, outlen, outprespace);
}
static void
reset (CamelMimeFilter *f)
{
CamelMimeFilterLinewrap *linewrap = (CamelMimeFilterLinewrap *)f;
linewrap->nchars = 0;
}
CamelMimeFilter *
camel_mime_filter_linewrap_new (guint preferred_len, guint max_len, char indent_char)
{
CamelMimeFilterLinewrap *linewrap =
CAMEL_MIME_FILTER_LINEWRAP (camel_object_new (CAMEL_MIME_FILTER_LINEWRAP_TYPE));
linewrap->indent = indent_char;
linewrap->wrap_len = preferred_len;
linewrap->max_len = max_len;
linewrap->nchars = 0;
return (CamelMimeFilter *) linewrap;
}
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