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, 253 insertions, 0 deletions

diff --git a/em-format/e-mail-parser-text-plain.c b/em-format/e-mail-parser-text-plain.c
new file mode 100644
index 0000000000..999030447b
--- /dev/null
+++ b/em-format/e-mail-parser-text-plain.c
@@ -0,0 +1,253 @@
+/*
+ * 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)
+{
+
+}