+
+GSList *folder_item_update_callbacks_list = NULL;
+gint folder_item_update_callbacks_nextid = 0;
+
+struct FolderItemUpdateCallback
+{
+ gint id;
+ FolderItemUpdateFunc func;
+ gpointer data;
+};
+
+gint folder_item_update_callback_register(FolderItemUpdateFunc func, gpointer data)
+{
+ struct FolderItemUpdateCallback *callback;
+
+ g_return_val_if_fail(func != NULL, -1);
+
+ folder_item_update_callbacks_nextid++;
+
+ callback = g_new0(struct FolderItemUpdateCallback, 1);
+ callback->id = folder_item_update_callbacks_nextid;
+ callback->func = func;
+ callback->data = data;
+
+ folder_item_update_callbacks_list =
+ g_slist_append(folder_item_update_callbacks_list, callback);
+
+ return folder_item_update_callbacks_nextid;
+}
+
+void folder_item_update_callback_unregister(gint id)
+{
+ GSList *list, *next;
+
+ for (list = folder_item_update_callbacks_list; list != NULL; list = next) {
+ struct FolderItemUpdateCallback *callback;
+
+ next = list->next;
+
+ callback = list->data;
+ if (callback->id == id) {
+ folder_item_update_callbacks_list =
+ g_slist_remove(folder_item_update_callbacks_list, callback);
+ g_free(callback);
+ }
+ }
+}
+
+static void folder_item_update_callback_execute(FolderItem *item, gboolean contentchange)
+{
+ GSList *list;
+
+ for (list = folder_item_update_callbacks_list; list != NULL; list = list->next) {
+ struct FolderItemUpdateCallback *callback;
+
+ callback = list->data;
+ callback->func(item, contentchange, callback->data);
+ }
+}
+
+void folder_update_item(FolderItem *item, gboolean contentchange)
+{
+ folder_item_update_callback_execute(item, contentchange);
+}
+
+static void folder_update_item_func(FolderItem *item, gpointer data)
+{
+ gboolean contentchange = GPOINTER_TO_INT(data);
+
+ if (item->need_update) {
+ folder_item_update_callback_execute(item, contentchange);
+ item->need_update = FALSE;
+ }
+}
+
+void folder_update_items_when_required(gboolean contentchange)
+{
+ folder_func_to_all_folders(folder_update_item_func, GINT_TO_POINTER(contentchange));
+}
+
+void folder_update_item_recursive(FolderItem *item, gboolean update_summary)
+{
+ GNode *node = item->folder->node;
+ node = g_node_find(node, G_PRE_ORDER, G_TRAVERSE_ALL, item);
+ node = node->children;
+ folder_item_update_callback_execute(item, update_summary);
+ while (node != NULL) {
+ if (node && node->data) {
+ FolderItem *next_item = (FolderItem*) node->data;
+ folder_item_update_callback_execute(next_item, update_summary);
+ }
+ node = node->next;
+ }
+}