[evolution] EPreviewPane: Handle "new-activity" signals from EWebView.

[Matthew Barnes <mbarnes src gnome org>]

commit 08f6274a49e4eaf478dfb6d50463f69ff67c62d7
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sat Jul 27 17:41:45 2013 -0400

    EPreviewPane: Handle "new-activity" signals from EWebView.
    
    Configures the EActivity to submit alerts to the EPreviewPane.

 e-util/e-preview-pane.c |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)
---
diff --git a/e-util/e-preview-pane.c b/e-util/e-preview-pane.c
index ae13a8b..929f392 100644
--- a/e-util/e-preview-pane.c
+++ b/e-util/e-preview-pane.c
@@ -32,6 +32,8 @@ struct _EPreviewPanePrivate {
        GtkWidget *alert_bar;
        GtkWidget *web_view;
        GtkWidget *search_bar;
+
+       gulong web_view_new_activity_handler_id;
 };
 
 enum {
@@ -60,13 +62,29 @@ G_DEFINE_TYPE_WITH_CODE (
                e_preview_pane_alert_sink_init))
 
 static void
+preview_pane_web_view_new_activity_cb (EWebView *web_view,
+                                       EActivity *activity,
+                                       EPreviewPane *preview_pane)
+{
+       e_activity_set_alert_sink (activity, E_ALERT_SINK (preview_pane));
+}
+
+static void
 preview_pane_set_web_view (EPreviewPane *preview_pane,
                            EWebView *web_view)
 {
+       gulong handler_id;
+
        g_return_if_fail (E_IS_WEB_VIEW (web_view));
        g_return_if_fail (preview_pane->priv->web_view == NULL);
 
        preview_pane->priv->web_view = g_object_ref_sink (web_view);
+
+       handler_id = g_signal_connect (
+               web_view, "new-activity",
+               G_CALLBACK (preview_pane_web_view_new_activity_cb),
+               preview_pane);
+       preview_pane->priv->web_view_new_activity_handler_id = handler_id;
 }
 
 static void
@@ -116,6 +134,13 @@ preview_pane_dispose (GObject *object)
 
        priv = E_PREVIEW_PANE_GET_PRIVATE (object);
 
+       if (priv->web_view_new_activity_handler_id > 0) {
+               g_signal_handler_disconnect (
+                       priv->web_view,
+                       priv->web_view_new_activity_handler_id);
+               priv->web_view_new_activity_handler_id = 0;
+       }
+
        g_clear_object (&priv->alert_bar);
        g_clear_object (&priv->search_bar);
        g_clear_object (&priv->web_view);