[evolution/gnome-3-16] Bug 676974 - Use window's alert sink when preview panel is hidden

[Milan Crha <mcrha src gnome org>]

commit 75fa5c83fc6fa939bb3231f0dc0cdf9e1adcbeaa
Author: Milan Crha <mcrha redhat com>
Date:   Wed Jun 10 15:38:29 2015 +0200

    Bug 676974 - Use window's alert sink when preview panel is hidden

 mail/e-mail-reader.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/mail/e-mail-reader.c b/mail/e-mail-reader.c
index 3c99aa7..4c35647 100644
--- a/mail/e-mail-reader.c
+++ b/mail/e-mail-reader.c
@@ -3181,6 +3181,15 @@ mail_reader_get_alert_sink (EMailReader *reader)
 
        preview_pane = e_mail_reader_get_preview_pane (reader);
 
+       if (!gtk_widget_is_visible (GTK_WIDGET (preview_pane))) {
+               GtkWindow *window;
+
+               window = e_mail_reader_get_window (reader);
+
+               if (E_IS_SHELL_WINDOW (window))
+                       return E_ALERT_SINK (window);
+       }
+
        return E_ALERT_SINK (preview_pane);
 }