Rework handling of GOA mail.

Disabling the mail part of an online account through the Control Center
panel will now remove the CamelService from the EMailSession in addition
to disabling the account/identity/transport ESources, causing it to be
delisted from the account list in Preferences.

Furthermore, hide the Enabled check box for accounts linked to GOA in
Preferences.  The collection ESource for these accounts can no longer
be disabled through Evolution; all such account manipulation must be
done through the Control Center panel.

Lastly, display an icon next to accounts linked to GOA in Preferences.

* Might be nice to show the actual provider icon instead of the generic
  Online Accounts icon from the Control Center, but need to think about
  how best to do that.  Don't want a GOA dependency in core Evolution.
  Maybe ESourceCollection should grow a GIcon property for the online-
  accounts module in the registry service to set?

1 files changed, 84 insertions, 0 deletions

diff --git a/libemail-engine/e-mail-session.c b/libemail-engine/e-mail-session.c
index 0b4ab58818..84ac60a736 100644
--- a/libemail-engine/e-mail-session.c
+++ b/libemail-engine/e-mail-session.c
@@ -74,6 +74,8 @@ struct _EMailSessionPrivate {
 
 	gulong source_added_handler_id;
 	gulong source_removed_handler_id;
+	gulong source_enabled_handler_id;
+	gulong source_disabled_handler_id;
 	gulong default_mail_account_handler_id;
 
 	CamelStore *local_store;
@@ -474,6 +476,27 @@ mail_session_refresh_cb (ESource *source,
 	g_signal_emit (session, signals[REFRESH_SERVICE], 0, service);
 }
 
+static gboolean
+mail_session_check_goa_mail_disabled (EMailSession *session,
+                                      ESource *source)
+{
+	ESource *goa_source;
+	ESourceRegistry *registry;
+	gboolean goa_mail_disabled = FALSE;
+
+	registry = e_mail_session_get_registry (session);
+
+	goa_source = e_source_registry_find_extension (
+		registry, source, E_SOURCE_EXTENSION_GOA);
+
+	if (goa_source != NULL) {
+		goa_mail_disabled = !e_source_get_enabled (source);
+		g_object_unref (goa_source);
+	}
+
+	return goa_mail_disabled;
+}
+
 static void
 mail_session_add_from_source (EMailSession *session,
                               CamelProviderType type,
@@ -507,6 +530,13 @@ mail_session_add_from_source (EMailSession *session,
 	g_return_if_fail (uid != NULL);
 	g_return_if_fail (backend_name != NULL);
 
+	/* Collection sources with a [GNOME Online Accounts] extension
+	 * require special handling.  If the collection's mail-enabled
+	 * flag is FALSE, do not add a CamelService.  The account must
+	 * not appear anywhere, not even in the Mail Accounts list. */
+	if (mail_session_check_goa_mail_disabled (session, source))
+		return;
+
 	/* Our own CamelSession.add_service() method will handle the
 	 * resulting CamelService, so we don't need the return value. */
 	camel_session_add_service (
@@ -580,6 +610,44 @@ mail_session_source_removed_cb (ESourceRegistry *registry,
 }
 
 static void
+mail_session_source_enabled_cb (ESourceRegistry *registry,
+                                ESource *source,
+                                EMailSession *session)
+{
+	ESource *goa_source;
+
+	/* If the source is linked to a GNOME Online Account,
+	 * enabling the source is equivalent to adding it. */
+
+	goa_source = e_source_registry_find_extension (
+		registry, source, E_SOURCE_EXTENSION_GOA);
+
+	if (goa_source != NULL) {
+		mail_session_source_added_cb (registry, source, session);
+		g_object_unref (goa_source);
+	}
+}
+
+static void
+mail_session_source_disabled_cb (ESourceRegistry *registry,
+                                 ESource *source,
+                                 EMailSession *session)
+{
+	ESource *goa_source;
+
+	/* If the source is linked to a GNOME Online Account,
+	 * disabling the source is equivalent to removing it. */
+
+	goa_source = e_source_registry_find_extension (
+		registry, source, E_SOURCE_EXTENSION_GOA);
+
+	if (goa_source != NULL) {
+		mail_session_source_removed_cb (registry, source, session);
+		g_object_unref (goa_source);
+	}
+}
+
+static void
 mail_session_default_mail_account_cb (ESourceRegistry *registry,
                                       GParamSpec *pspec,
                                       EMailSession *session)
@@ -881,6 +949,12 @@ mail_session_dispose (GObject *object)
 			priv->source_removed_handler_id);
 		g_signal_handler_disconnect (
 			priv->registry,
+			priv->source_enabled_handler_id);
+		g_signal_handler_disconnect (
+			priv->registry,
+			priv->source_disabled_handler_id);
+		g_signal_handler_disconnect (
+			priv->registry,
 			priv->default_mail_account_handler_id);
 
 		/* This requires the registry. */
@@ -1029,6 +1103,16 @@ mail_session_constructed (GObject *object)
 	session->priv->source_removed_handler_id = handler_id;
 
 	handler_id = g_signal_connect (
+		registry, "source-enabled",
+		G_CALLBACK (mail_session_source_enabled_cb), session);
+	session->priv->source_enabled_handler_id = handler_id;
+
+	handler_id = g_signal_connect (
+		registry, "source-disabled",
+		G_CALLBACK (mail_session_source_disabled_cb), session);
+	session->priv->source_disabled_handler_id = handler_id;
+
+	handler_id = g_signal_connect (
 		registry, "notify::default-mail-account",
 		G_CALLBACK (mail_session_default_mail_account_cb), session);
 	session->priv->default_mail_account_handler_id = handler_id;