Add EditorUndoRedoManager singleton

1 files changed, 12 insertions, 0 deletions

diff --git a/editor/editor_undo_redo_manager.cpp b/editor/editor_undo_redo_manager.cpp
index 2ef52bd85a..f65f905b25 100644
--- a/editor/editor_undo_redo_manager.cpp
+++ b/editor/editor_undo_redo_manager.cpp
@@ -39,6 +39,8 @@
 #include "editor/editor_node.h"
 #include "scene/main/node.h"
 
+EditorUndoRedoManager *EditorUndoRedoManager::singleton = nullptr;
+
 EditorUndoRedoManager::History &EditorUndoRedoManager::get_or_create_history(int p_idx) {
 	if (!history_map.has(p_idx)) {
 		History history;
@@ -503,6 +505,16 @@ void EditorUndoRedoManager::_bind_methods() {
 	BIND_ENUM_CONSTANT(INVALID_HISTORY);
 }
 
+EditorUndoRedoManager *EditorUndoRedoManager::get_singleton() {
+	return singleton;
+}
+
+EditorUndoRedoManager::EditorUndoRedoManager() {
+	if (!singleton) {
+		singleton = this;
+	}
+}
+
 EditorUndoRedoManager::~EditorUndoRedoManager() {
 	for (const KeyValue<int, History> &E : history_map) {
 		discard_history(E.key, false);