[evolution] EMemoShellView: Handle error signals from memo list backends.

[Matthew Barnes <mbarnes src gnome org>]

commit a2c6e4569e99d0029804748a91abf13c8f47b50f
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sat Feb 16 06:53:22 2013 -0500

    EMemoShellView: Handle error signals from memo list backends.

 modules/calendar/e-memo-shell-view-private.c |   48 +++++++++++++++++++++++++-
 modules/calendar/e-memo-shell-view-private.h |    3 ++
 2 files changed, 50 insertions(+), 1 deletions(-)
---
diff --git a/modules/calendar/e-memo-shell-view-private.c b/modules/calendar/e-memo-shell-view-private.c
index d634c1e8..6f8a270 100644
--- a/modules/calendar/e-memo-shell-view-private.c
+++ b/modules/calendar/e-memo-shell-view-private.c
@@ -99,6 +99,30 @@ memo_shell_view_selector_popup_event_cb (EShellView *shell_view,
 }
 
 static void
+memo_shell_view_backend_error_cb (EClientCache *client_cache,
+                                  EClient *client,
+                                  EAlert *alert,
+                                  EMemoShellView *memo_shell_view)
+{
+       EMemoShellContent *memo_shell_content;
+       ESource *source;
+       const gchar *extension_name;
+
+       memo_shell_content = memo_shell_view->priv->memo_shell_content;
+
+       source = e_client_get_source (client);
+       extension_name = E_SOURCE_EXTENSION_MEMO_LIST;
+
+       /* Only submit alerts from memo list backends. */
+       if (e_source_has_extension (source, extension_name)) {
+               EAlertSink *alert_sink;
+
+               alert_sink = E_ALERT_SINK (memo_shell_content);
+               e_alert_sink_submit_alert (alert_sink, alert);
+       }
+}
+
+static void
 memo_shell_view_load_view_collection (EShellViewClass *shell_view_class)
 {
        GalViewCollection *collection;
@@ -167,20 +191,23 @@ e_memo_shell_view_private_constructed (EMemoShellView *memo_shell_view)
        EMemoShellViewPrivate *priv = memo_shell_view->priv;
        EMemoShellContent *memo_shell_content;
        EMemoShellSidebar *memo_shell_sidebar;
-       EShellView *shell_view;
        EShellBackend *shell_backend;
        EShellContent *shell_content;
        EShellSidebar *shell_sidebar;
        EShellWindow *shell_window;
+       EShellView *shell_view;
+       EShell *shell;
        EMemoTable *memo_table;
        ECalModel *model;
        ESourceSelector *selector;
+       gulong handler_id;
 
        shell_view = E_SHELL_VIEW (memo_shell_view);
        shell_backend = e_shell_view_get_shell_backend (shell_view);
        shell_content = e_shell_view_get_shell_content (shell_view);
        shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);
        shell_window = e_shell_view_get_shell_window (shell_view);
+       shell = e_shell_window_get_shell (shell_window);
 
        e_shell_window_add_action_group (shell_window, "memos");
        e_shell_window_add_action_group (shell_window, "memos-filter");
@@ -197,6 +224,16 @@ e_memo_shell_view_private_constructed (EMemoShellView *memo_shell_view)
        memo_shell_sidebar = E_MEMO_SHELL_SIDEBAR (shell_sidebar);
        selector = e_memo_shell_sidebar_get_selector (memo_shell_sidebar);
 
+       /* Keep our own reference to this so we can
+        * disconnect our signal handler in dispose(). */
+       priv->client_cache = g_object_ref (e_shell_get_client_cache (shell));
+
+       handler_id = g_signal_connect (
+               priv->client_cache, "backend-error",
+               G_CALLBACK (memo_shell_view_backend_error_cb),
+               memo_shell_view);
+       priv->backend_error_handler_id = handler_id;
+
        g_signal_connect_swapped (
                model, "notify::timezone",
                G_CALLBACK (e_memo_shell_view_update_timezone),
@@ -293,10 +330,19 @@ e_memo_shell_view_private_dispose (EMemoShellView *memo_shell_view)
 {
        EMemoShellViewPrivate *priv = memo_shell_view->priv;
 
+       if (priv->backend_error_handler_id > 0) {
+               g_signal_handler_disconnect (
+                       priv->client_cache,
+                       priv->backend_error_handler_id);
+               priv->backend_error_handler_id = 0;
+       }
+
        g_clear_object (&priv->memo_shell_backend);
        g_clear_object (&priv->memo_shell_content);
        g_clear_object (&priv->memo_shell_sidebar);
 
+       g_clear_object (&priv->client_cache);
+
        if (memo_shell_view->priv->activity != NULL) {
                /* XXX Activity is not cancellable. */
                e_activity_set_state (
diff --git a/modules/calendar/e-memo-shell-view-private.h b/modules/calendar/e-memo-shell-view-private.h
index 87c8ee1..63bcb9b 100644
--- a/modules/calendar/e-memo-shell-view-private.h
+++ b/modules/calendar/e-memo-shell-view-private.h
@@ -78,6 +78,9 @@ struct _EMemoShellViewPrivate {
        EMemoShellContent *memo_shell_content;
        EMemoShellSidebar *memo_shell_sidebar;
 
+       EClientCache *client_cache;
+       gulong backend_error_handler_id;
+
        EActivity *activity;
 };