[evolution] Add e_mail_reader_expunge_folder_name().

[Matthew Barnes <mbarnes src gnome org>]

commit b3d0f3d8ea8691c48e4edfc0436ed43ca12f6ea5
Author: Matthew Barnes <mbarnes redhat com>
Date:   Mon Jul 9 07:21:42 2012 -0400

    Add e_mail_reader_expunge_folder_name().
    
    Fetches the CamelFolder asynchronously, then expunges it asynchronously.

 mail/e-mail-reader-utils.c |   67 ++++++++++++++++++++++++++++++++++++++++++++
 mail/e-mail-reader-utils.h |    4 ++
 2 files changed, 71 insertions(+), 0 deletions(-)
---
diff --git a/mail/e-mail-reader-utils.c b/mail/e-mail-reader-utils.c
index eed03f3..3839973 100644
--- a/mail/e-mail-reader-utils.c
+++ b/mail/e-mail-reader-utils.c
@@ -447,6 +447,73 @@ e_mail_reader_expunge_folder (EMailReader *reader,
 	}
 }
 
+/* Helper for e_mail_reader_expunge_folder_name() */
+static void
+mail_reader_expunge_folder_name_cb (GObject *source_object,
+                                    GAsyncResult *result,
+                                    gpointer user_data)
+{
+	CamelStore *store;
+	CamelFolder *folder;
+	AsyncContext *context;
+	EAlertSink *alert_sink;
+	GError *error = NULL;
+
+	store = CAMEL_STORE (source_object);
+	context = (AsyncContext *) user_data;
+
+	alert_sink = e_activity_get_alert_sink (context->activity);
+
+	/* XXX The returned CamelFolder is a borrowed reference. */
+	folder = camel_store_get_folder_finish (store, result, &error);
+
+	if (e_activity_handle_cancellation (context->activity, error)) {
+		g_error_free (error);
+
+	} else if (error != NULL) {
+		e_alert_submit (
+			alert_sink, "mail:no-expunge-folder",
+			context->folder_name, error->message, NULL);
+		g_error_free (error);
+
+	} else {
+		e_activity_set_state (
+			context->activity, E_ACTIVITY_COMPLETED);
+		e_mail_reader_expunge_folder (context->reader, folder);
+	}
+
+	async_context_free (context);
+}
+
+void
+e_mail_reader_expunge_folder_name (EMailReader *reader,
+                                   CamelStore *store,
+                                   const gchar *folder_name)
+{
+	EActivity *activity;
+	AsyncContext *context;
+	GCancellable *cancellable;
+
+	g_return_if_fail (E_IS_MAIL_READER (reader));
+	g_return_if_fail (CAMEL_IS_STORE (store));
+	g_return_if_fail (folder_name != NULL);
+
+	activity = e_mail_reader_new_activity (reader);
+	cancellable = e_activity_get_cancellable (activity);
+
+	context = g_slice_new0 (AsyncContext);
+	context->activity = activity;
+	context->reader = g_object_ref (reader);
+	context->folder_name = g_strdup (folder_name);
+
+	camel_store_get_folder (
+		store, folder_name,
+		CAMEL_STORE_FOLDER_INFO_FAST,
+		G_PRIORITY_DEFAULT, cancellable,
+		mail_reader_expunge_folder_name_cb,
+		context);
+}
+
 /* Helper for e_mail_reader_refresh_folder() */
 static void
 mail_reader_refresh_folder_cb (GObject *source_object,
diff --git a/mail/e-mail-reader-utils.h b/mail/e-mail-reader-utils.h
index 3f1d924..4cb427f 100644
--- a/mail/e-mail-reader-utils.h
+++ b/mail/e-mail-reader-utils.h
@@ -45,6 +45,10 @@ void		e_mail_reader_delete_folder_name
 						 const gchar *folder_name);
 void		e_mail_reader_expunge_folder	(EMailReader *reader,
 						 CamelFolder *folder);
+void		e_mail_reader_expunge_folder_name
+						(EMailReader *reader,
+						 CamelStore *store,
+						 const gchar *folder_name);
 void		e_mail_reader_refresh_folder	(EMailReader *reader,
 						 CamelFolder *folder);
 void		e_mail_reader_refresh_folder_name