libnm: revert coercing NMVpnConnectionStateReason to NMActiveConnectionStateReason

NMVpnConnectionStateReason is no longer used and replaced by
NMActiveConnectionStateReason. However, the old enums should
stay in place as they were:

Otherwise:
  #define NMVpnConnectionStateReason NMActiveConnectionStateReason
causes compiler warnings:
  NMVpnConnectionStateReason x;
  x = NM_VPN_CONNECTION_STATE_REASON_UNKNOWN;             // -Wenum-conversion
  if (x == NM_VPN_CONNECTION_STATE_REASON_NO_SECRETS) { } // -Wenum-compare

Similarly, a user who didn't upgrade shall continue to get the
old GType for NM_TYPE_VPN_CONNECTION_STATE_REASON.

In practice, old users will have no issues using the old enum
the places where it worked before.
The only use of the deprecated enum is in vpn_state_changed()
signal slot of NMVpnConnection. This makes the signal slot
itself deprecated. However, NMVpnConnection is an NMObject and commonly
created within libnm itself, not by the user. It is very unlikely that
a user of libnm subclassed NMVpnConnection and makes use of the
vpn_state_changed() signal slot. So, deprecate it without replacement.

Fixes: a91369f80d44d1fc748fc3a9f5d9ef0fb566c77c

2 files changed, 13 insertions, 10 deletions

diff --git a/libnm/nm-vpn-connection.c b/libnm/nm-vpn-connection.c
index b773096eb8..814f45f0f8 100644
--- a/libnm/nm-vpn-connection.c
+++ b/libnm/nm-vpn-connection.c
@@ -36,6 +36,8 @@ G_DEFINE_TYPE (NMVpnConnection, nm_vpn_connection, NM_TYPE_ACTIVE_CONNECTION)
 
 #define NM_VPN_CONNECTION_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_VPN_CONNECTION, NMVpnConnectionPrivate))
 
+G_STATIC_ASSERT (sizeof (NMVpnConnectionStateReason) == sizeof (NMActiveConnectionStateReason));
+
 typedef struct {
 	char *banner;
 	NMVpnConnectionState vpn_state;
@@ -220,6 +222,7 @@ nm_vpn_connection_class_init (NMVpnConnectionClass *connection_class)
 		                      G_PARAM_STATIC_STRINGS));
 
 	/* signals */
+	G_GNUC_BEGIN_IGNORE_DEPRECATIONS
 	signals[VPN_STATE_CHANGED] =
 		g_signal_new ("vpn-state-changed",
 		              G_OBJECT_CLASS_TYPE (object_class),
@@ -228,10 +231,5 @@ nm_vpn_connection_class_init (NMVpnConnectionClass *connection_class)
 		              NULL, NULL, NULL,
 		              G_TYPE_NONE, 2,
 		              G_TYPE_UINT, G_TYPE_UINT);
-}
-
-GType
-nm_vpn_connection_state_reason_get_type (void)
-{
-	return nm_active_connection_state_reason_get_type ();
+	G_GNUC_END_IGNORE_DEPRECATIONS
 }
diff --git a/libnm/nm-vpn-connection.h b/libnm/nm-vpn-connection.h
index 23b17d963a..9913a873d3 100644
--- a/libnm/nm-vpn-connection.h
+++ b/libnm/nm-vpn-connection.h
@@ -41,9 +41,6 @@ G_BEGIN_DECLS
 #define NM_VPN_CONNECTION_VPN_STATE "vpn-state"
 #define NM_VPN_CONNECTION_BANNER "banner"
 
-GType nm_vpn_connection_state_reason_get_type (void) G_GNUC_CONST;
-#define NM_TYPE_VPN_CONNECTION_STATE_REASON (nm_vpn_connection_state_reason_get_type ())
-
 /**
  * NMVpnConnection:
  */
@@ -55,9 +52,17 @@ typedef struct {
 	NMActiveConnectionClass parent;
 
 	/* Signals */
+
+	/* NMVpnConnectionStateReason got deprecated in 1.8.0. Thus, vpn_state_changed()
+	 * uses a deprecated type and is itself deprecated.
+	 *
+	 * If you use this signal slot, you are advised to cast the reason
+	 * to the NMActiveConnectionStateReason type, which is fully compatible.
+	 */
+	NM_DEPRECATED_IN_1_8
 	void (*vpn_state_changed) (NMVpnConnection *connection,
 	                           NMVpnConnectionState state,
-	                           NMActiveConnectionStateReason reason);
+	                           NMVpnConnectionStateReason reason);
 
 	/*< private >*/
 	gpointer padding[4];