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, 191 insertions, 0 deletions

diff --git a/em-format/e-mail-parser-multipart-alternative.c b/em-format/e-mail-parser-multipart-alternative.c
new file mode 100644
index 0000000000..c8bbfdc31d
--- /dev/null
+++ b/em-format/e-mail-parser-multipart-alternative.c
@@ -0,0 +1,191 @@
+/*
+ * e-mail-parser-multipart-alternative.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-part-utils.h>
+#include <e-util/e-util.h>
+
+#include <camel/camel.h>
+
+#include <string.h>
+
+typedef struct _EMailParserMultipartAlternative {
+	GObject parent;
+} EMailParserMultipartAlternative;
+
+typedef struct _EMailParserMultipartAlternativeClass {
+	GObjectClass parent_class;
+} EMailParserMultipartAlternativeClass;
+
+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 (
+	EMailParserMultipartAlternative,
+	e_mail_parser_multipart_alternative,
+	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[] = { "multipart/alternative", NULL };
+
+static gboolean
+related_display_part_is_attachment (CamelMimePart *part)
+{
+	CamelMimePart *display_part;
+
+	display_part = e_mail_part_get_related_display_part (part, NULL);
+	return display_part && e_mail_part_is_attachment (display_part);
+}
+
+static GSList *
+empe_mp_alternative_parse (EMailParserExtension *extension,
+                           EMailParser *parser,
+                           CamelMimePart *part,
+                           GString *part_id,
+                           GCancellable *cancellable)
+{
+	CamelMultipart *mp;
+	gint i, nparts, bestid = 0;
+	CamelMimePart *best = NULL;
+	GSList *parts;
+	EMailExtensionRegistry *reg;
+
+	if (g_cancellable_is_cancelled (cancellable))
+		return NULL;
+
+	reg = e_mail_parser_get_extension_registry (parser);
+
+	mp = (CamelMultipart *) camel_medium_get_content ((CamelMedium *) part);
+
+	if (!CAMEL_IS_MULTIPART (mp)) {
+		return e_mail_parser_parse_part_as (
+				parser, part, part_id,
+				"application/vnd.evolution.source",
+				cancellable);
+	}
+
+	/* as per rfc, find the last part we know how to display */
+	nparts = camel_multipart_get_number (mp);
+	for (i = 0; i < nparts; i++) {
+		CamelMimePart *mpart;
+		CamelDataWrapper *data_wrapper;
+		CamelContentType *type;
+		CamelStream *null_stream;
+		gchar *mime_type;
+		gsize content_size;
+
+		if (g_cancellable_is_cancelled (cancellable))
+			return NULL;
+
+		/* is it correct to use the passed in *part here? */
+		mpart = camel_multipart_get_part (mp, i);
+
+		if (mpart == NULL)
+			continue;
+
+		/* This may block even though the stream does not.
+		 * XXX Pretty inefficient way to test if the MIME part
+		 *     is empty.  Surely there's a quicker way? */
+		null_stream = camel_stream_null_new ();
+		data_wrapper = camel_medium_get_content (CAMEL_MEDIUM (mpart));
+		camel_data_wrapper_decode_to_stream_sync (
+			data_wrapper, null_stream, cancellable, NULL);
+		content_size = CAMEL_STREAM_NULL (null_stream)->written;
+		g_object_unref (null_stream);
+
+		if (content_size == 0)
+			continue;
+
+		type = camel_mime_part_get_content_type (mpart);
+		mime_type = camel_content_type_simple (type);
+
+		camel_strdown (mime_type);
+
+		if (!e_mail_part_is_attachment (mpart) &&
+			 ((camel_content_type_is (type, "multipart", "related") == 0) ||
+			  !related_display_part_is_attachment (mpart)) &&
+		    (e_mail_extension_registry_get_for_mime_type (reg, mime_type) ||
+			((best == NULL) &&
+			 (e_mail_extension_registry_get_fallback (reg, mime_type)))))
+		{
+			best = mpart;
+			bestid = i;
+		}
+
+		g_free (mime_type);
+	}
+
+	if (best) {
+		gint len = part_id->len;
+
+		g_string_append_printf(part_id, ".alternative.%d", bestid);
+
+		parts = e_mail_parser_parse_part (
+			parser, best, part_id, cancellable);
+
+		g_string_truncate (part_id, len);
+	} else {
+		parts = e_mail_parser_parse_part_as (
+			parser, part, part_id, "multipart/mixed", cancellable);
+	}
+
+	return parts;
+}
+
+static const gchar **
+empe_mp_alternative_mime_types (EMailExtension *extension)
+{
+	return parser_mime_types;
+}
+
+static void
+e_mail_parser_multipart_alternative_class_init (EMailParserMultipartAlternativeClass *klass)
+{
+	e_mail_parser_multipart_alternative_parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface)
+{
+	iface->parse = empe_mp_alternative_parse;
+}
+
+static void
+e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface)
+{
+	iface->mime_types = empe_mp_alternative_mime_types;
+}
+
+static void
+e_mail_parser_multipart_alternative_init (EMailParserMultipartAlternative *parser)
+{
+
+}