add kanban

addons/kanban_tasks/plugin_singleton/singletons.gd

@@ -0,0 +1,23 @@
+extends Object
+
+## Allows the registration of anonymous singletons into the scene tree.
+
+
+const HOLDER_NAME: String = "PluginSingletons"
+
+
+static func instance_of(p_script: Script, requester: Node) -> Variant:
+	var holder: Node = requester.get_tree().get_root().get_node_or_null(HOLDER_NAME)
+
+	if not is_instance_valid(holder):
+		holder = Node.new()
+		holder.name = HOLDER_NAME
+		requester.get_tree().get_root().add_child(holder)
+
+	for child in holder.get_children():
+		if child.get_script() == p_script:
+			return child
+
+	var instance: Node = p_script.new()
+	holder.add_child(instance)
+	return instance