[dconf] gsettings: handle writability notification

[Ryan Lortie <desrt src gnome org>]

commit 615cbd7990f29d70dca33282695b3a0bbeb89cde
Author: Ryan Lortie <desrt desrt ca>
Date:   Wed Nov 27 12:30:01 2013 -0500

    gsettings: handle writability notification
    
    Wire through the writability notifications from the engine to the
    correct signals on GSettingsBackend.

 gsettings/dconfsettingsbackend.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/gsettings/dconfsettingsbackend.c b/gsettings/dconfsettingsbackend.c
index 0c908ed..d27d14a 100644
--- a/gsettings/dconfsettingsbackend.c
+++ b/gsettings/dconfsettingsbackend.c
@@ -256,6 +256,21 @@ dconf_engine_change_notify (DConfEngine         *engine,
   if (changes[0] == NULL)
     return;
 
+  if (is_writability)
+    {
+      /* We know that the engine does it this way... */
+      g_assert (changes[0][0] == '\0' && changes[1] == NULL);
+
+      if (g_str_has_suffix (prefix, "/"))
+        g_settings_backend_path_writable_changed (G_SETTINGS_BACKEND (dcsb), prefix);
+      else
+        g_settings_backend_writable_changed (G_SETTINGS_BACKEND (dcsb), prefix);
+    }
+
+  /* We send the normal change notification even in the event that this
+   * was a writability notification because adding/removing a lock could
+   * impact the value that gets read.
+   */
   if (changes[1] == NULL)
     {
       if (g_str_has_suffix (prefix, "/"))