/*
* e-mail-parser-text-plain.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "e-mail-format-extensions.h"
#include <em-format/e-mail-parser-extension.h>
#include <em-format/e-mail-parser.h>
#include <em-format/e-mail-inline-filter.h>
#include <em-format/e-mail-part-utils.h>
#include <e-util/e-util.h>
#include <glib/gi18n-lib.h>
#include <camel/camel.h>
#include <ctype.h>
typedef struct _EMailParserTextPlain {
GObject parent;
} EMailParserTextPlain;
typedef struct _EMailParserTextPlainClass {
GObjectClass parent_class;
} EMailParserTextPlainClass;
static void e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface);
static void e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface);
G_DEFINE_TYPE_EXTENDED (
EMailParserTextPlain,
e_mail_parser_text_plain,
G_TYPE_OBJECT,
0,
G_IMPLEMENT_INTERFACE (
E_TYPE_MAIL_EXTENSION,
e_mail_parser_mail_extension_interface_init)
G_IMPLEMENT_INTERFACE (
E_TYPE_MAIL_PARSER_EXTENSION,
e_mail_parser_parser_extension_interface_init));
static const gchar *parser_mime_types[] = { "text/plain", "text/*", NULL };
static gboolean
part_is_empty (CamelMimePart *part)
{
CamelDataWrapper *dw;
GByteArray *ba;
guint i;
dw = camel_medium_get_content (CAMEL_MEDIUM (part));
ba = camel_data_wrapper_get_byte_array (dw);
if (!ba)
return TRUE;
for (i = 0; i < ba->len; i++) {
/* Checks for \n, \t, \f, \r, \v and space */
if (!isspace (ba->data[i]))
return FALSE;
}
return TRUE;
}
static GSList *
process_part (EMailParser *parser,
GString *part_id,
gint part_number,
CamelMimePart *part,
gboolean is_attachment,
GCancellable *cancellable)
{
CamelContentType *type;
EMailPart *empart;
gint s_len = part_id->len;
GSList *parts;
if (part_is_empty (part)) {
return g_slist_alloc ();
}
type = camel_mime_part_get_content_type (part);
if (camel_content_type_is (type, "text", "*") &&
(!camel_content_type_is (type, "text", "calendar"))) {
g_string_append_printf (part_id, ".plain_text.%d", part_number);
empart = e_mail_part_new (part, part_id->str);
empart->mime_type = camel_content_type_simple (type);
g_string_truncate (part_id, s_len);
if (is_attachment) {
return e_mail_parser_wrap_as_attachment (
parser, part,
g_slist_append (NULL, empart),
part_id, cancellable);
}
return g_slist_append (NULL, empart);
}
g_string_append_printf (part_id, ".inline.%d", part_number);
parts = e_mail_parser_parse_part (
parser, CAMEL_MIME_PART (part),
part_id, cancellable);
g_string_truncate (part_id, s_len);
return parts;
}
static GSList *
empe_text_plain_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable)
{
GSList *parts;
CamelStream *filtered_stream, *null;
CamelMultipart *mp;
CamelDataWrapper *dw;
CamelContentType *type;
gint i, count;
EMailInlineFilter *inline_filter;
gboolean charset_added = FALSE;
const gchar *snoop_type = NULL;
gboolean is_attachment;
if (g_cancellable_is_cancelled (cancellable))
return NULL;
dw = camel_medium_get_content ((CamelMedium *) part);
if (!dw)
return NULL;
/* This scans the text part for inline-encoded data, creates
* a multipart of all the parts inside it. */
/* FIXME: We should discard this multipart if it only contains
* the original text, but it makes this hash lookup more complex */
if (!dw->mime_type)
snoop_type = e_mail_part_snoop_type (part);
/* if we had to snoop the part type to get here, then
* use that as the base type, yuck */
if (snoop_type == NULL
|| (type = camel_content_type_decode (snoop_type)) == NULL) {
type = dw->mime_type;
camel_content_type_ref (type);
}
if (dw->mime_type && type != dw->mime_type && camel_content_type_param (dw->mime_type, "charset")) {
camel_content_type_set_param (type, "charset", camel_content_type_param (dw->mime_type, "charset"));
charset_added = TRUE;
}
null = camel_stream_null_new ();
filtered_stream = camel_stream_filter_new (null);
g_object_unref (null);
inline_filter = e_mail_inline_filter_new (camel_mime_part_get_encoding (part), type);
camel_stream_filter_add (
CAMEL_STREAM_FILTER (filtered_stream),
CAMEL_MIME_FILTER (inline_filter));
camel_data_wrapper_decode_to_stream_sync (
dw, (CamelStream *) filtered_stream, cancellable, NULL);
camel_stream_close ((CamelStream *) filtered_stream, cancellable, NULL);
g_object_unref (filtered_stream);
mp = e_mail_inline_filter_get_multipart (inline_filter);
if (charset_added) {
camel_content_type_set_param (type, "charset", NULL);
}
g_object_unref (inline_filter);
camel_content_type_unref (type);
/* We handle our made-up multipart here, so we don't recursively call ourselves */
count = camel_multipart_get_number (mp);
parts = NULL;
is_attachment = ((count == 1) && (e_mail_part_is_attachment (part)));
for (i = 0; i < count; i++) {
CamelMimePart *newpart = camel_multipart_get_part (mp, i);
if (!newpart)
continue;
parts = g_slist_concat (parts,
process_part (
parser, part_id, i,
newpart, is_attachment,
cancellable));
}
g_object_unref (mp);
return parts;
}
static const gchar **
empe_text_plain_mime_types (EMailExtension *extension)
{
return parser_mime_types;
}
static void
e_mail_parser_text_plain_class_init (EMailParserTextPlainClass *klass)
{
e_mail_parser_text_plain_parent_class = g_type_class_peek_parent (klass);
}
static void
e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface)
{
iface->parse = empe_text_plain_parse;
}
static void
e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface)
{
iface->mime_types = empe_text_plain_mime_types;
}
static void
e_mail_parser_text_plain_init (EMailParserTextPlain *parser)
{
}
