Make EAttachment a little more thread-safe.

EAttachment is now used from worker threads by EMailFormatterAttachment,
so add some thread-safe accessor functions to eliminate potential races.

Added thread-safe functions:

    e_attachment_dup_disposition()
    e_attachment_ref_file()
    e_attachment_ref_file_info()
    e_attachment_ref_icon()
    e_attachment_ref_mime_part()
    e_attachment_dup_description()
    e_attachment_dup_thumbnail_path()

Renamed functions:

    e_attachment_get_mime_type() -> e_attachment_dup_mime_type()

Removed non-thread-safe functions:

    e_attachment_get_file()
    e_attachment_get_file_info()
    e_attachment_get_icon()
    e_attachment_get_mime_part()
    e_attachment_get_description()
    e_attachment_get_thumbnail_path()

3 files changed, 15 insertions, 12 deletions

diff --git a/em-format/e-mail-formatter-attachment.c b/em-format/e-mail-formatter-attachment.c
index 1003b55eef..fb997c0230 100644
--- a/em-format/e-mail-formatter-attachment.c
+++ b/em-format/e-mail-formatter-attachment.c
@@ -198,17 +198,17 @@ emfe_attachment_format (EMailFormatterExtension *extension,
 		if (context->mode == E_MAIL_FORMATTER_MODE_PRINTING) {
 			gchar *name;
 			EAttachment *attachment;
-			GFileInfo *fi;
-			const gchar *description;
+			GFileInfo *file_info;
 			const gchar *display_name;
+			gchar *description;
 
 			attachment = e_mail_part_attachment_ref_attachment (
 				E_MAIL_PART_ATTACHMENT (part));
 
-			fi = e_attachment_get_file_info (attachment);
-			display_name = g_file_info_get_display_name (fi);
+			file_info = e_attachment_ref_file_info (attachment);
+			display_name = g_file_info_get_display_name (file_info);
 
-			description = e_attachment_get_description (attachment);
+			description = e_attachment_dup_description (attachment);
 			if (description != NULL && *description != '\0') {
 				name = g_strdup_printf (
 					"<h2>Attachment: %s (%s)</h2>\n",
@@ -222,9 +222,11 @@ emfe_attachment_format (EMailFormatterExtension *extension,
 			camel_stream_write_string (
 				stream, name, cancellable, NULL);
 
+			g_free (description);
 			g_free (name);
 
 			g_object_unref (attachment);
+			g_object_unref (file_info);
 		}
 
 		for (iter = g_queue_peek_head_link (extensions); iter; iter = iter->next) {
diff --git a/em-format/e-mail-formatter-print.c b/em-format/e-mail-formatter-print.c
index 0728cb6a8e..4d5c303d03 100644
--- a/em-format/e-mail-formatter-print.c
+++ b/em-format/e-mail-formatter-print.c
@@ -57,20 +57,21 @@ mail_formatter_print_write_attachments (EMailFormatter *formatter,
 		EMailPartAttachment *part;
 		EAttachment *attachment;
 		GFileInfo *file_info;
-		gchar *name, *size;
-		const gchar *description;
 		const gchar *display_name;
+		gchar *description;
+		gchar *name;
+		gchar *size;
 
 		part = g_queue_pop_head (attachments);
 		attachment = e_mail_part_attachment_ref_attachment (part);
 
-		file_info = e_attachment_get_file_info (attachment);
+		file_info = e_attachment_ref_file_info (attachment);
 		if (file_info == NULL) {
 			g_object_unref (attachment);
 			continue;
 		}
 
-		description = e_attachment_get_description (attachment);
+		description = e_attachment_dup_description (attachment);
 		display_name = g_file_info_get_display_name (file_info);
 
 		if (description != NULL && *description != '\0') {
@@ -86,10 +87,12 @@ mail_formatter_print_write_attachments (EMailFormatter *formatter,
 			str, "<tr><td>%s</td><td>%s</td></tr>\n",
 			name, size);
 
+		g_free (description);
 		g_free (name);
 		g_free (size);
 
 		g_object_unref (attachment);
+		g_object_unref (file_info);
 	}
 
 	g_string_append (str, "</table>\n");
diff --git a/em-format/e-mail-parser.c b/em-format/e-mail-parser.c
index f31e0ca199..57c362e286 100644
--- a/em-format/e-mail-parser.c
+++ b/em-format/e-mail-parser.c
@@ -734,14 +734,12 @@ e_mail_parser_wrap_as_attachment (EMailParser *parser,
 	if (size != 0) {
 		GFileInfo *file_info;
 
-		file_info = e_attachment_get_file_info (attachment);
+		file_info = e_attachment_ref_file_info (attachment);
 
 		if (file_info == NULL) {
 			file_info = g_file_info_new ();
 			g_file_info_set_content_type (
 				file_info, empa->snoop_mime_type);
-		} else {
-			g_object_ref (file_info);
 		}
 
 		g_file_info_set_size (file_info, size);