ECollectionBackend: Add default method for dup_resource_id().

Now checks for an E_SOURCE_EXTENSION_RESOURCE by default and returns the
"identity" value if the extension if present.  Otherwise it returns NULL.

diff --git a/libebackend/e-collection-backend.c b/libebackend/e-collection-backend.c
index 063e383..888b5a5 100644 (file)
--- a/libebackend/e-collection-backend.c
+++ b/libebackend/e-collection-backend.c
@@ -572,6 +572,25 @@ collection_backend_populate (ECollectionBackend *backend)
        /* Placeholder so subclasses can safely chain up. */
 }
 
+static gchar *
+collection_backend_dup_resource_id (ECollectionBackend *backend,
+                                    ESource *source)
+{
+       const gchar *extension_name;
+       gchar *resource_id = NULL;
+
+       extension_name = E_SOURCE_EXTENSION_RESOURCE;
+
+       if (e_source_has_extension (source, extension_name)) {
+               ESourceResource *extension;
+
+               extension = e_source_get_extension (source, extension_name);
+               resource_id = e_source_resource_dup_identity (extension);
+       }
+
+       return resource_id;
+}
+
 static void
 collection_backend_child_added (ECollectionBackend *backend,
                                 ESource *child_source)
@@ -610,6 +629,7 @@ e_collection_backend_class_init (ECollectionBackendClass *class)
        object_class->constructed = collection_backend_constructed;
 
        class->populate = collection_backend_populate;
+       class->dup_resource_id = collection_backend_dup_resource_id;
        class->child_added = collection_backend_child_added;
        class->child_removed = collection_backend_child_removed;