[empathy] roster-window: watch for TpAccount:connection changes

[Guillaume Desmottes <gdesmott src gnome org>]

commit ddb4928052ff303f024ea9b69e10064fade790a3
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Thu Jan 12 12:25:21 2012 +0100

    roster-window: watch for TpAccount:connection changes
    
    The account being connected isn't longer enough to ensure that its
    TpConnection is defined.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=667743

 src/empathy-roster-window.c |   29 +++++++++++++++++++++++++----
 1 files changed, 25 insertions(+), 4 deletions(-)
---
diff --git a/src/empathy-roster-window.c b/src/empathy-roster-window.c
index 7fc7f9a..f45474c 100644
--- a/src/empathy-roster-window.c
+++ b/src/empathy-roster-window.c
@@ -1294,9 +1294,6 @@ roster_window_connection_changed_cb (TpAccount  *account,
     {
       empathy_sound_manager_play (self->priv->sound_mgr, GTK_WIDGET (self),
               EMPATHY_SOUND_ACCOUNT_DISCONNECTED);
-
-      /* remove balance action if required */
-      roster_window_remove_balance_action (self, account);
     }
 
   if (current == TP_CONNECTION_STATUS_CONNECTED)
@@ -1306,7 +1303,6 @@ roster_window_connection_changed_cb (TpAccount  *account,
 
       /* Account connected without error, remove error message if any */
       roster_window_remove_error (self, account);
-      roster_window_setup_balance (self, account);
     }
 }
 
@@ -2053,6 +2049,26 @@ roster_window_account_removed_cb (TpAccountManager  *manager,
 }
 
 static void
+account_connection_notify_cb (TpAccount *account,
+    GParamSpec *spec,
+    EmpathyRosterWindow *self)
+{
+  TpConnection *conn;
+
+  conn = tp_account_get_connection (account);
+
+  if (conn != NULL)
+    {
+      roster_window_setup_balance (self, account);
+    }
+  else
+    {
+      /* remove balance action if required */
+      roster_window_remove_balance_action (self, account);
+    }
+}
+
+static void
 add_account (EmpathyRosterWindow *self,
     TpAccount *account)
 {
@@ -2071,6 +2087,11 @@ add_account (EmpathyRosterWindow *self,
   g_hash_table_insert (self->priv->status_changed_handlers,
     account, GUINT_TO_POINTER (handler_id));
 
+  /* roster_window_setup_balance() relies on the TpConnection to be ready on
+   * the TpAccount so we connect this signal as well. */
+  tp_g_signal_connect_object (account, "notify::connection",
+      G_CALLBACK (account_connection_notify_cb), self, 0);
+
   roster_window_setup_balance (self, account);
 }