[nautilus] sendto-extension: Check for available mail client

[Cosimo Cecchi <cosimoc src gnome org>]

commit 837091b55d41b118d4a8a7fb35bbd8c96326012f
Author: Plamena Manolova <plamena n manolova intel com>
Date:   Tue Jun 4 13:05:24 2013 +0100

    sendto-extension: Check for available mail client
    
    The sendto extension now checks for an available client
    supported by nautilus sendto and conditionaly adds the
    "Email" option to the file menu list.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=701653

 nautilus-sendto-extension/nautilus-nste.c |   18 +++++++++++++++++-
 1 files changed, 17 insertions(+), 1 deletions(-)
---
diff --git a/nautilus-sendto-extension/nautilus-nste.c b/nautilus-sendto-extension/nautilus-nste.c
index f637211..3e09835 100644
--- a/nautilus-sendto-extension/nautilus-nste.c
+++ b/nautilus-sendto-extension/nautilus-nste.c
@@ -56,6 +56,20 @@ sendto_callback (NautilusMenuItem *item,
        g_string_free (cmd, TRUE);
 }
 
+static gboolean
+check_available_mailer ()
+{
+       GAppInfo *app_info;
+
+       app_info = g_app_info_get_default_for_uri_scheme ("mailto");
+       if (app_info) {
+               g_clear_object (&app_info);
+               return TRUE;
+       }
+       else
+               return FALSE;
+}
+
 static GList *
 nautilus_nste_get_file_items (NautilusMenuProvider *provider,
                              GtkWidget            *window,
@@ -72,6 +86,9 @@ nautilus_nste_get_file_items (NautilusMenuProvider *provider,
 
        if (files == NULL)
                return NULL;
+  
+       if (!check_available_mailer ())
+               return NULL;
 
        one_item = (files != NULL) && (files->next == NULL);
        if (one_item &&
@@ -161,4 +178,3 @@ nautilus_nste_register_type (GTypeModule *module)
                                     NAUTILUS_TYPE_MENU_PROVIDER,
                                     &menu_provider_iface_info);
 }
-