[evolution] EClientSelector: Pre-fetch relevant EClient instance.

[Matthew Barnes <mbarnes src gnome org>]

commit e82cb12e16285e137ea7b50ecac5bfbdf3aab7a4
Author: Matthew Barnes <mbarnes redhat com>
Date:   Fri Feb 22 10:37:19 2013 -0500

    EClientSelector: Pre-fetch relevant EClient instance.
    
    Asyncrhonously fetch all relevant EClient instances during instance
    initialization to try and get them cached ahead of time, and so that
    all status icons are present when the tree view is shown.

 e-util/e-client-selector.c |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)
---
diff --git a/e-util/e-client-selector.c b/e-util/e-client-selector.c
index 802310f..1c3a71e 100644
--- a/e-util/e-client-selector.c
+++ b/e-util/e-client-selector.c
@@ -132,6 +132,21 @@ client_selector_client_created_cb (EClientCache *client_cache,
 }
 
 static void
+client_selector_prefetch_cb (GObject *source_object,
+                             GAsyncResult *result,
+                             gpointer user_data)
+{
+       EClient *client;
+
+       /* We don't care about errors here.  This is just to try and
+        * get the EClient instances we'll need cached ahead of time. */
+       client = e_client_selector_get_client_finish (
+               E_CLIENT_SELECTOR (source_object), result, NULL);
+
+       g_clear_object (&client);
+}
+
+static void
 client_selector_client_notify_cb (EClientCache *client_cache,
                                   EClient *client,
                                   GParamSpec *pspec,
@@ -224,9 +239,12 @@ client_selector_constructed (GObject *object)
 {
        EClientSelector *selector;
        EClientCache *client_cache;
+       ESourceRegistry *registry;
        GtkTreeView *tree_view;
        GtkTreeViewColumn *column;
        GtkCellRenderer *renderer;
+       const gchar *extension_name;
+       GList *list, *link;
        gulong handler_id;
 
        selector = E_CLIENT_SELECTOR (object);
@@ -270,6 +288,24 @@ client_selector_constructed (GObject *object)
        selector->priv->client_notify_online_handler_id = handler_id;
 
        g_object_unref (client_cache);
+
+       /* Pre-fetch EClient instances for all relevant ESources.
+        * This is just to try and make sure they get cached ahead
+        * of time, so we need not worry about reporting errors. */
+
+       registry = e_source_selector_get_registry (
+               E_SOURCE_SELECTOR (selector));
+       extension_name = e_source_selector_get_extension_name (
+               E_SOURCE_SELECTOR (selector));
+
+       list = e_source_registry_list_sources (registry, extension_name);
+
+       for (link = list; link != NULL; link = g_list_next (link))
+               e_client_selector_get_client (
+                       selector, E_SOURCE (link->data), NULL,
+                       client_selector_prefetch_cb, NULL);
+
+       g_list_free_full (list, (GDestroyNotify) g_object_unref);
 }
 
 static void