Mail formatter rewrite

All mail-parsing and formatting code has been moved to em-format.
Parsing is handeled by EMailParser class, formatting by EMailFormatter.
Both classes have registry which hold extensions - simple classes
that do actual parsing and formatting. Each supported mime-type
has it's own parser and formatter extension class.

1 files changed, 213 insertions, 0 deletions

diff --git a/em-format/e-mail-parser-application-mbox.c b/em-format/e-mail-parser-application-mbox.c
new file mode 100644
index 0000000000..c396c48416
--- /dev/null
+++ b/em-format/e-mail-parser-application-mbox.c
@@ -0,0 +1,213 @@
+/*
+ * e-mail-parser-application-mbox.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 <glib-object.h>
+#include <glib/gi18n-lib.h>
+
+#include <em-format/e-mail-parser-extension.h>
+#include <em-format/e-mail-parser.h>
+#include <em-format/e-mail-part-utils.h>
+#include <e-util/e-util.h>
+
+#include <camel/camel.h>
+
+#include <string.h>
+
+typedef struct _EMailParserApplicationMBox {
+	GObject parent;
+} EMailParserApplicationMBox;
+
+typedef struct _EMailParserApplicationMBoxClass {
+	GObjectClass parent_class;
+} EMailParserApplicationMBoxClass;
+
+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 (
+	EMailParserApplicationMBox,
+	e_mail_parser_application_mbox,
+	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[] = { "application/mbox",
+					    NULL };
+
+static GSList *
+empe_app_mbox_parse (EMailParserExtension *extension,
+                     EMailParser *parser,
+                     CamelMimePart *part,
+                     GString *part_id,
+                     GCancellable *cancellable)
+{
+	CamelMimeParser *mime_parser;
+	CamelStream *mem_stream;
+	camel_mime_parser_state_t state;
+	gint old_len;
+	gint messages;
+	GSList *parts;
+	GError *error;
+
+	if (g_cancellable_is_cancelled (cancellable))
+		return NULL;
+
+	/* Extract messages from the application/mbox part and
+	 * render them as a flat list of messages. */
+
+	/* XXX If the mbox has multiple messages, maybe render them
+	 *     as a multipart/digest so each message can be expanded
+	 *     or collapsed individually.
+	 *
+	 *     See attachment_handler_mail_x_uid_list() for example. */
+
+	/* XXX This is based on em_utils_read_messages_from_stream().
+	 *     Perhaps refactor that function to return an array of
+	 *     messages instead of assuming we want to append them
+	 *     to a folder? */
+
+	mime_parser = camel_mime_parser_new ();
+	camel_mime_parser_scan_from (mime_parser, TRUE);
+
+	mem_stream = camel_stream_mem_new ();
+	camel_data_wrapper_decode_to_stream_sync (
+		camel_medium_get_content (CAMEL_MEDIUM (part)),
+		mem_stream, NULL, NULL);
+	g_seekable_seek (G_SEEKABLE (mem_stream), 0, G_SEEK_SET, cancellable, NULL);
+
+	error =  NULL;
+	camel_mime_parser_init_with_stream (mime_parser, mem_stream, &error);
+	if (error) {
+		parts = e_mail_parser_error (parser, cancellable,
+				_("Error parsing MBOX part: %s"),
+				error->message ?
+					error->message :
+					_("Unknown error"));
+		g_clear_error (&error);
+		g_object_unref (mem_stream);
+		g_object_unref (mime_parser);
+		return parts;
+	}
+
+	g_object_unref (mem_stream);
+
+	old_len = part_id->len;
+
+	/* Extract messages from the mbox. */
+	messages = 0;
+	state = camel_mime_parser_step (mime_parser, NULL, NULL);
+
+	parts = NULL;
+	while (state == CAMEL_MIME_PARSER_STATE_FROM) {
+		CamelMimeMessage *message;
+		CamelMimePart *opart;
+		GSList *new_parts;
+
+		message = camel_mime_message_new ();
+		opart = CAMEL_MIME_PART (message);
+
+		if (!camel_mime_part_construct_from_parser_sync (
+			opart, mime_parser, NULL, NULL)) {
+			g_object_unref (message);
+			break;
+		}
+
+		g_string_append_printf (part_id, ".mbox.%d", messages);
+
+		new_parts = e_mail_parser_parse_part_as (
+				parser, CAMEL_MIME_PART (message),
+				part_id, "message/rfc822", cancellable);
+
+		/* Wrap every message as attachment */
+		new_parts = e_mail_parser_wrap_as_attachment (
+				parser, CAMEL_MIME_PART (message),
+				new_parts, part_id, cancellable);
+
+		/* Inline all messages in mbox */
+		if (new_parts && new_parts->data) {
+			EMailPart *p = new_parts->data;
+
+			p->force_inline = TRUE;
+		}
+
+		parts = g_slist_concat (parts, new_parts);
+
+		g_string_truncate (part_id, old_len);
+
+		g_object_unref (message);
+
+		/* Skip past CAMEL_MIME_PARSER_STATE_FROM_END. */
+		camel_mime_parser_step (mime_parser, NULL, NULL);
+
+		state = camel_mime_parser_step (mime_parser, NULL, NULL);
+
+		messages++;
+	}
+
+	g_object_unref (mime_parser);
+
+	return parts;
+}
+
+static guint32
+empe_app_mbox_get_flags (EMailParserExtension *extension)
+{
+	return E_MAIL_PARSER_EXTENSION_INLINE |
+		E_MAIL_PARSER_EXTENSION_COMPOUND_TYPE;
+}
+
+static const gchar **
+empe_app_mbox_mime_types (EMailExtension *extension)
+{
+	return parser_mime_types;
+}
+
+static void
+e_mail_parser_application_mbox_class_init (EMailParserApplicationMBoxClass *klass)
+{
+	e_mail_parser_application_mbox_parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *interface)
+{
+	interface->parse = empe_app_mbox_parse;
+	interface->get_flags = empe_app_mbox_get_flags;
+}
+
+static void
+e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *interface)
+{
+	interface->mime_types = empe_app_mbox_mime_types;
+}
+
+static void
+e_mail_parser_application_mbox_init (EMailParserApplicationMBox *self)
+{
+}