[glib/wip/nacho/registry-writable: 2/4] registrybackend: handle readability of the keys

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 7bc4c66c98602ba64eab06e56344a9caae1a4273
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Tue Feb 2 13:12:22 2016 +0100

    registrybackend: handle readability of the keys
    
    If a key is removed or it cannot be read anymore we should
    notify the backend about it so it fallbacks to the default
    value.

 gio/gregistrysettingsbackend.c |   20 +++++++++++++++++++-
 1 files changed, 19 insertions(+), 1 deletions(-)
---
diff --git a/gio/gregistrysettingsbackend.c b/gio/gregistrysettingsbackend.c
index 1497c97..3f1cf13 100644
--- a/gio/gregistrysettingsbackend.c
+++ b/gio/gregistrysettingsbackend.c
@@ -1198,6 +1198,21 @@ typedef struct
 } RegistryEvent;
 
 static void
+mark_item_keys_as_changed (GNode    *node,
+                           gpointer  data)
+{
+  RegistryCacheItem *item = node->data;
+  RegistryEvent *event = data;
+
+  /* Iterate until we find an item that is a value */
+  if (item->value.type == REG_NONE)
+    g_node_children_foreach (node, G_TRAVERSE_ALL,
+                             mark_item_keys_as_changed, data);
+  else
+    g_ptr_array_add (event->items, g_strdup (item->name));
+}
+
+static void
 registry_cache_remove_deleted (GNode    *node,
                                gpointer  data)
 {
@@ -1205,7 +1220,10 @@ registry_cache_remove_deleted (GNode    *node,
   RegistryEvent *event = data;
 
   if (!item->readable)
-    registry_cache_destroy_tree (node, event->self->watch);
+    {
+      mark_item_keys_as_changed (node, data);
+      registry_cache_destroy_tree (node, event->self->watch);
+    }
 }
 
 /* Update cache from registry, and optionally report on the changes.