Add EditorUndoRedoManager singleton

7 files changed, 58 insertions, 50 deletions

diff --git a/editor/plugins/tiles/atlas_merging_dialog.cpp b/editor/plugins/tiles/atlas_merging_dialog.cpp
index 4128029fc6..eaf72d36ba 100644
--- a/editor/plugins/tiles/atlas_merging_dialog.cpp
+++ b/editor/plugins/tiles/atlas_merging_dialog.cpp
@@ -31,7 +31,6 @@
 #include "atlas_merging_dialog.h"
 
 #include "editor/editor_file_dialog.h"
-#include "editor/editor_node.h"
 #include "editor/editor_scale.h"
 #include "editor/editor_undo_redo_manager.h"
 
@@ -172,7 +171,7 @@ void AtlasMergingDialog::_merge_confirmed(String p_path) {
 	Ref<Texture2D> new_texture_resource = ResourceLoader::load(p_path, "Texture2D");
 	merged->set_texture(new_texture_resource);
 
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->create_action(TTR("Merge TileSetAtlasSource"));
 	int next_id = tile_set->get_next_source_id();
 	undo_redo->add_do_method(*tile_set, "add_source", merged, next_id);
@@ -212,7 +211,7 @@ void AtlasMergingDialog::ok_pressed() {
 }
 
 void AtlasMergingDialog::cancel_pressed() {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	for (int i = 0; i < commited_actions_count; i++) {
 		undo_redo->undo();
 	}
diff --git a/editor/plugins/tiles/tile_data_editors.cpp b/editor/plugins/tiles/tile_data_editors.cpp
index fb4787f13c..966d394ca1 100644
--- a/editor/plugins/tiles/tile_data_editors.cpp
+++ b/editor/plugins/tiles/tile_data_editors.cpp
@@ -265,12 +265,12 @@ void GenericTilePolygonEditor::_zoom_changed() {
 }
 
 void GenericTilePolygonEditor::_advanced_menu_item_pressed(int p_item_pressed) {
-	Ref<EditorUndoRedoManager> undo_redo;
+	EditorUndoRedoManager *undo_redo;
 	if (use_undo_redo) {
-		undo_redo = EditorNode::get_undo_redo();
+		undo_redo = EditorUndoRedoManager::get_singleton();
 	} else {
 		// This nice hack allows for discarding undo actions without making code too complex.
-		undo_redo.instantiate();
+		undo_redo = memnew(EditorUndoRedoManager);
 	}
 
 	switch (p_item_pressed) {
@@ -361,6 +361,10 @@ void GenericTilePolygonEditor::_advanced_menu_item_pressed(int p_item_pressed) {
 		default:
 			break;
 	}
+
+	if (!use_undo_redo) {
+		memdelete(undo_redo);
+	}
 }
 
 void GenericTilePolygonEditor::_grab_polygon_point(Vector2 p_pos, const Transform2D &p_polygon_xform, int &r_polygon_index, int &r_point_index) {
@@ -445,12 +449,12 @@ void GenericTilePolygonEditor::_snap_to_half_pixel(Point2 &r_point) {
 }
 
 void GenericTilePolygonEditor::_base_control_gui_input(Ref<InputEvent> p_event) {
-	Ref<EditorUndoRedoManager> undo_redo;
+	EditorUndoRedoManager *undo_redo;
 	if (use_undo_redo) {
-		undo_redo = EditorNode::get_undo_redo();
+		undo_redo = EditorUndoRedoManager::get_singleton();
 	} else {
 		// This nice hack allows for discarding undo actions without making code too complex.
-		undo_redo.instantiate();
+		undo_redo = memnew(EditorUndoRedoManager);
 	}
 
 	real_t grab_threshold = EDITOR_GET("editors/polygon_editor/point_grab_radius");
@@ -643,6 +647,10 @@ void GenericTilePolygonEditor::_base_control_gui_input(Ref<InputEvent> p_event)
 	}
 
 	base_control->queue_redraw();
+
+	if (!use_undo_redo) {
+		memdelete(undo_redo);
+	}
 }
 
 void GenericTilePolygonEditor::set_use_undo_redo(bool p_use_undo_redo) {
@@ -902,7 +910,7 @@ Variant TileDataDefaultEditor::_get_value(TileSetAtlasSource *p_tile_set_atlas_s
 }
 
 void TileDataDefaultEditor::_setup_undo_redo_action(TileSetAtlasSource *p_tile_set_atlas_source, HashMap<TileMapCell, Variant, TileMapCell> p_previous_values, Variant p_new_value) {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	for (const KeyValue<TileMapCell, Variant> &E : p_previous_values) {
 		Vector2i coords = E.key.get_atlas_coords();
 		undo_redo->add_undo_property(p_tile_set_atlas_source, vformat("%d:%d/%d/%s", coords.x, coords.y, E.key.alternative_tile, property), E.value);
@@ -971,7 +979,7 @@ void TileDataDefaultEditor::forward_painting_atlas_gui_input(TileAtlasView *p_ti
 		}
 	}
 
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	Ref<InputEventMouseButton> mb = p_event;
 	if (mb.is_valid()) {
 		if (mb->get_button_index() == MouseButton::LEFT) {
@@ -1095,7 +1103,7 @@ void TileDataDefaultEditor::forward_painting_alternatives_gui_input(TileAtlasVie
 					drag_last_pos = mb->get_position();
 				}
 			} else {
-				Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 				undo_redo->create_action(TTR("Painting Tiles Property"));
 				_setup_undo_redo_action(p_tile_set_atlas_source, drag_modified, drag_painted_value);
 				undo_redo->commit_action(false);
@@ -1345,7 +1353,7 @@ Variant TileDataOcclusionShapeEditor::_get_value(TileSetAtlasSource *p_tile_set_
 }
 
 void TileDataOcclusionShapeEditor::_setup_undo_redo_action(TileSetAtlasSource *p_tile_set_atlas_source, HashMap<TileMapCell, Variant, TileMapCell> p_previous_values, Variant p_new_value) {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	for (const KeyValue<TileMapCell, Variant> &E : p_previous_values) {
 		Vector2i coords = E.key.get_atlas_coords();
 		undo_redo->add_undo_property(p_tile_set_atlas_source, vformat("%d:%d/%d/occlusion_layer_%d/polygon", coords.x, coords.y, E.key.alternative_tile, occlusion_layer), E.value);
@@ -1525,7 +1533,7 @@ Variant TileDataCollisionEditor::_get_value(TileSetAtlasSource *p_tile_set_atlas
 
 void TileDataCollisionEditor::_setup_undo_redo_action(TileSetAtlasSource *p_tile_set_atlas_source, HashMap<TileMapCell, Variant, TileMapCell> p_previous_values, Variant p_new_value) {
 	Array new_array = p_new_value;
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	for (KeyValue<TileMapCell, Variant> &E : p_previous_values) {
 		Array old_array = E.value;
 
@@ -2227,7 +2235,7 @@ void TileDataTerrainsEditor::forward_painting_atlas_gui_input(TileAtlasView *p_t
 					}
 				}
 			} else {
-				Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 				if (drag_type == DRAG_TYPE_PAINT_TERRAIN_SET_RECT) {
 					Rect2i rect;
 					rect.set_position(p_tile_atlas_view->get_atlas_tile_coords_at_pos(drag_start_pos));
@@ -2600,7 +2608,7 @@ void TileDataTerrainsEditor::forward_painting_alternatives_gui_input(TileAtlasVi
 					}
 				}
 			} else {
-				Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 				if (drag_type == DRAG_TYPE_PAINT_TERRAIN_SET) {
 					undo_redo->create_action(TTR("Painting Tiles Property"));
 					for (KeyValue<TileMapCell, Variant> &E : drag_modified) {
@@ -2747,7 +2755,7 @@ Variant TileDataNavigationEditor::_get_value(TileSetAtlasSource *p_tile_set_atla
 }
 
 void TileDataNavigationEditor::_setup_undo_redo_action(TileSetAtlasSource *p_tile_set_atlas_source, HashMap<TileMapCell, Variant, TileMapCell> p_previous_values, Variant p_new_value) {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	for (const KeyValue<TileMapCell, Variant> &E : p_previous_values) {
 		Vector2i coords = E.key.get_atlas_coords();
 		undo_redo->add_undo_property(p_tile_set_atlas_source, vformat("%d:%d/%d/navigation_layer_%d/polygon", coords.x, coords.y, E.key.alternative_tile, navigation_layer), E.value);
diff --git a/editor/plugins/tiles/tile_map_editor.cpp b/editor/plugins/tiles/tile_map_editor.cpp
index e9c313a372..e3a8d5b146 100644
--- a/editor/plugins/tiles/tile_map_editor.cpp
+++ b/editor/plugins/tiles/tile_map_editor.cpp
@@ -273,7 +273,7 @@ void TileMapEditorTilesPlugin::_patterns_item_list_gui_input(const Ref<InputEven
 	if (ED_IS_SHORTCUT("tiles_editor/paste", p_event) && p_event->is_pressed() && !p_event->is_echo()) {
 		select_last_pattern = true;
 		int new_pattern_index = tile_set->get_patterns_count();
-		Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 		undo_redo->create_action(TTR("Add TileSet pattern"));
 		undo_redo->add_do_method(*tile_set, "add_pattern", tile_map_clipboard, new_pattern_index);
 		undo_redo->add_undo_method(*tile_set, "remove_pattern", new_pattern_index);
@@ -283,7 +283,7 @@ void TileMapEditorTilesPlugin::_patterns_item_list_gui_input(const Ref<InputEven
 
 	if (ED_IS_SHORTCUT("tiles_editor/delete", p_event) && p_event->is_pressed() && !p_event->is_echo()) {
 		Vector<int> selected = patterns_item_list->get_selected_items();
-		Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 		undo_redo->create_action(TTR("Remove TileSet patterns"));
 		for (int i = 0; i < selected.size(); i++) {
 			int pattern_index = selected[i];
@@ -515,7 +515,7 @@ bool TileMapEditorTilesPlugin::forward_canvas_gui_input(const Ref<InputEvent> &p
 		if (ED_IS_SHORTCUT("tiles_editor/cut", p_event)) {
 			// Delete selected tiles.
 			if (!tile_map_selection.is_empty()) {
-				Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 				undo_redo->create_action(TTR("Delete tiles"));
 				for (const Vector2i &E : tile_map_selection) {
 					undo_redo->add_do_method(tile_map, "set_cell", tile_map_layer, E, TileSet::INVALID_SOURCE, TileSetSource::INVALID_ATLAS_COORDS, TileSetSource::INVALID_TILE_ALTERNATIVE);
@@ -547,7 +547,7 @@ bool TileMapEditorTilesPlugin::forward_canvas_gui_input(const Ref<InputEvent> &p
 	if (ED_IS_SHORTCUT("tiles_editor/delete", p_event)) {
 		// Delete selected tiles.
 		if (!tile_map_selection.is_empty()) {
-			Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 			undo_redo->create_action(TTR("Delete tiles"));
 			for (const Vector2i &E : tile_map_selection) {
 				undo_redo->add_do_method(tile_map, "set_cell", tile_map_layer, E, TileSet::INVALID_SOURCE, TileSetSource::INVALID_ATLAS_COORDS, TileSetSource::INVALID_TILE_ALTERNATIVE);
@@ -1240,7 +1240,7 @@ void TileMapEditorTilesPlugin::_stop_dragging() {
 	Transform2D xform = CanvasItemEditor::get_singleton()->get_canvas_transform() * tile_map->get_global_transform();
 	Vector2 mpos = xform.affine_inverse().xform(CanvasItemEditor::get_singleton()->get_viewport_control()->get_local_mouse_position());
 
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	switch (drag_type) {
 		case DRAG_TYPE_SELECT: {
 			undo_redo->create_action(TTR("Change selection"));
@@ -2641,7 +2641,7 @@ void TileMapEditorTerrainsPlugin::_stop_dragging() {
 	Transform2D xform = CanvasItemEditor::get_singleton()->get_canvas_transform() * tile_map->get_global_transform();
 	Vector2 mpos = xform.affine_inverse().xform(CanvasItemEditor::get_singleton()->get_viewport_control()->get_local_mouse_position());
 
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	switch (drag_type) {
 		case DRAG_TYPE_PICK: {
 			Vector2i coords = tile_map->local_to_map(mpos);
@@ -3489,7 +3489,7 @@ void TileMapEditor::_advanced_menu_button_id_pressed(int p_id) {
 	}
 
 	if (p_id == 0) { // Replace Tile Proxies
-		Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 		undo_redo->create_action(TTR("Replace Tiles with Proxies"));
 		for (int layer_index = 0; layer_index < tile_map->get_layers_count(); layer_index++) {
 			TypedArray<Vector2i> used_cells = tile_map->get_used_cells(layer_index);
@@ -3706,8 +3706,8 @@ void TileMapEditor::_update_layers_selection() {
 }
 
 void TileMapEditor::_move_tile_map_array_element(Object *p_undo_redo, Object *p_edited, String p_array_prefix, int p_from_index, int p_to_pos) {
-	Ref<EditorUndoRedoManager> undo_redo_man = Object::cast_to<EditorUndoRedoManager>(p_undo_redo);
-	ERR_FAIL_COND(undo_redo_man.is_null());
+	EditorUndoRedoManager *undo_redo_man = Object::cast_to<EditorUndoRedoManager>(p_undo_redo);
+	ERR_FAIL_NULL(undo_redo_man);
 
 	TileMap *tile_map = Object::cast_to<TileMap>(p_edited);
 	if (!tile_map) {
diff --git a/editor/plugins/tiles/tile_proxies_manager_dialog.cpp b/editor/plugins/tiles/tile_proxies_manager_dialog.cpp
index ef82e748a8..f6aeffa13f 100644
--- a/editor/plugins/tiles/tile_proxies_manager_dialog.cpp
+++ b/editor/plugins/tiles/tile_proxies_manager_dialog.cpp
@@ -30,10 +30,11 @@
 
 #include "tile_proxies_manager_dialog.h"
 
-#include "editor/editor_node.h"
 #include "editor/editor_scale.h"
 #include "editor/editor_settings.h"
 #include "editor/editor_undo_redo_manager.h"
+#include "scene/gui/dialogs.h"
+#include "scene/gui/popup_menu.h"
 #include "scene/gui/separator.h"
 
 void TileProxiesManagerDialog::_right_clicked(int p_item, Vector2 p_local_mouse_pos, MouseButton p_mouse_button_index, Object *p_item_list) {
@@ -55,7 +56,7 @@ void TileProxiesManagerDialog::_menu_id_pressed(int p_id) {
 }
 
 void TileProxiesManagerDialog::_delete_selected_bindings() {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->create_action(TTR("Remove Tile Proxies"));
 
 	Vector<int> source_level_selected = source_level_list->get_selected_items();
@@ -155,7 +156,7 @@ void TileProxiesManagerDialog::_property_changed(const String &p_path, const Var
 }
 
 void TileProxiesManagerDialog::_add_button_pressed() {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	if (from.source_id != TileSet::INVALID_SOURCE && to.source_id != TileSet::INVALID_SOURCE) {
 		Vector2i from_coords = from.get_atlas_coords();
 		Vector2i to_coords = to.get_atlas_coords();
@@ -196,7 +197,7 @@ void TileProxiesManagerDialog::_add_button_pressed() {
 }
 
 void TileProxiesManagerDialog::_clear_invalid_button_pressed() {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->create_action(TTR("Delete All Invalid Tile Proxies"));
 
 	undo_redo->add_do_method(*tile_set, "cleanup_invalid_tile_proxies");
@@ -224,7 +225,7 @@ void TileProxiesManagerDialog::_clear_invalid_button_pressed() {
 }
 
 void TileProxiesManagerDialog::_clear_all_button_pressed() {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->create_action(TTR("Delete All Tile Proxies"));
 
 	undo_redo->add_do_method(*tile_set, "clear_tile_proxies");
@@ -305,7 +306,7 @@ void TileProxiesManagerDialog::_unhandled_key_input(Ref<InputEvent> p_event) {
 }
 
 void TileProxiesManagerDialog::cancel_pressed() {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	for (int i = 0; i < commited_actions_count; i++) {
 		undo_redo->undo();
 	}
diff --git a/editor/plugins/tiles/tile_set_atlas_source_editor.cpp b/editor/plugins/tiles/tile_set_atlas_source_editor.cpp
index 146a53f3dd..b67d47ad5f 100644
--- a/editor/plugins/tiles/tile_set_atlas_source_editor.cpp
+++ b/editor/plugins/tiles/tile_set_atlas_source_editor.cpp
@@ -1332,7 +1332,7 @@ void TileSetAtlasSourceEditor::_tile_atlas_control_gui_input(const Ref<InputEven
 }
 
 void TileSetAtlasSourceEditor::_end_dragging() {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	switch (drag_type) {
 		case DRAG_TYPE_CREATE_TILES:
 			undo_redo->create_action(TTR("Create tiles"));
@@ -1563,7 +1563,7 @@ HashMap<Vector2i, List<const PropertyInfo *>> TileSetAtlasSourceEditor::_group_p
 }
 
 void TileSetAtlasSourceEditor::_menu_option(int p_option) {
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 
 	switch (p_option) {
 		case TILE_DELETE: {
@@ -2079,8 +2079,8 @@ void TileSetAtlasSourceEditor::_atlas_source_proxy_object_changed(String p_what)
 }
 
 void TileSetAtlasSourceEditor::_undo_redo_inspector_callback(Object *p_undo_redo, Object *p_edited, String p_property, Variant p_new_value) {
-	Ref<EditorUndoRedoManager> undo_redo_man = Object::cast_to<EditorUndoRedoManager>(p_undo_redo);
-	ERR_FAIL_COND(!undo_redo_man.is_valid());
+	EditorUndoRedoManager *undo_redo_man = Object::cast_to<EditorUndoRedoManager>(p_undo_redo);
+	ERR_FAIL_NULL(undo_redo_man);
 
 #define ADD_UNDO(obj, property) undo_redo_man->add_undo_property(obj, property, obj->get(property));
 
@@ -2210,7 +2210,7 @@ void TileSetAtlasSourceEditor::_auto_create_tiles() {
 		Vector2i separation = tile_set_atlas_source->get_separation();
 		Vector2i texture_region_size = tile_set_atlas_source->get_texture_region_size();
 		Size2i grid_size = tile_set_atlas_source->get_atlas_grid_size();
-		Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 		undo_redo->create_action(TTR("Create tiles in non-transparent texture regions"));
 		for (int y = 0; y < grid_size.y; y++) {
 			for (int x = 0; x < grid_size.x; x++) {
@@ -2256,7 +2256,7 @@ void TileSetAtlasSourceEditor::_auto_remove_tiles() {
 		Vector2i texture_region_size = tile_set_atlas_source->get_texture_region_size();
 		Vector2i grid_size = tile_set_atlas_source->get_atlas_grid_size();
 
-		Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 		undo_redo->create_action(TTR("Remove tiles in fully transparent texture regions"));
 
 		List<PropertyInfo> list;
diff --git a/editor/plugins/tiles/tile_set_editor.cpp b/editor/plugins/tiles/tile_set_editor.cpp
index b44cb18dc7..4f6522f130 100644
--- a/editor/plugins/tiles/tile_set_editor.cpp
+++ b/editor/plugins/tiles/tile_set_editor.cpp
@@ -67,7 +67,7 @@ void TileSetEditor::_drop_data_fw(const Point2 &p_point, const Variant &p_data,
 				// Actually create the new source.
 				Ref<TileSetAtlasSource> atlas_source = memnew(TileSetAtlasSource);
 				atlas_source->set_texture(resource);
-				Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 				undo_redo->create_action(TTR("Add a new atlas source"));
 				undo_redo->add_do_method(*tile_set, "add_source", atlas_source, source_id);
 				undo_redo->add_do_method(*atlas_source, "set_texture_region_size", tile_set->get_tile_size());
@@ -260,7 +260,7 @@ void TileSetEditor::_source_delete_pressed() {
 	Ref<TileSetSource> source = tile_set->get_source(to_delete);
 
 	// Remove the source.
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->create_action(TTR("Remove source"));
 	undo_redo->add_do_method(*tile_set, "remove_source", to_delete);
 	undo_redo->add_undo_method(*tile_set, "add_source", source, to_delete);
@@ -279,7 +279,7 @@ void TileSetEditor::_source_add_id_pressed(int p_id_pressed) {
 			Ref<TileSetAtlasSource> atlas_source = memnew(TileSetAtlasSource);
 
 			// Add a new source.
-			Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 			undo_redo->create_action(TTR("Add atlas source"));
 			undo_redo->add_do_method(*tile_set, "add_source", atlas_source, source_id);
 			undo_redo->add_do_method(*atlas_source, "set_texture_region_size", tile_set->get_tile_size());
@@ -294,7 +294,7 @@ void TileSetEditor::_source_add_id_pressed(int p_id_pressed) {
 			Ref<TileSetScenesCollectionSource> scene_collection_source = memnew(TileSetScenesCollectionSource);
 
 			// Add a new source.
-			Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 			undo_redo->create_action(TTR("Add atlas source"));
 			undo_redo->add_do_method(*tile_set, "add_source", scene_collection_source, source_id);
 			undo_redo->add_undo_method(*tile_set, "remove_source", source_id);
@@ -369,7 +369,7 @@ void TileSetEditor::_patterns_item_list_gui_input(const Ref<InputEvent> &p_event
 
 	if (ED_IS_SHORTCUT("tiles_editor/delete", p_event) && p_event->is_pressed() && !p_event->is_echo()) {
 		Vector<int> selected = patterns_item_list->get_selected_items();
-		Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 		undo_redo->create_action(TTR("Remove TileSet patterns"));
 		for (int i = 0; i < selected.size(); i++) {
 			int pattern_index = selected[i];
@@ -416,8 +416,8 @@ void TileSetEditor::_tab_changed(int p_tab_changed) {
 }
 
 void TileSetEditor::_move_tile_set_array_element(Object *p_undo_redo, Object *p_edited, String p_array_prefix, int p_from_index, int p_to_pos) {
-	Ref<EditorUndoRedoManager> undo_redo_man = Object::cast_to<EditorUndoRedoManager>(p_undo_redo);
-	ERR_FAIL_COND(undo_redo_man.is_null());
+	EditorUndoRedoManager *undo_redo_man = Object::cast_to<EditorUndoRedoManager>(p_undo_redo);
+	ERR_FAIL_NULL(undo_redo_man);
 
 	TileSet *ed_tile_set = Object::cast_to<TileSet>(p_edited);
 	if (!ed_tile_set) {
@@ -597,8 +597,8 @@ void TileSetEditor::_move_tile_set_array_element(Object *p_undo_redo, Object *p_
 }
 
 void TileSetEditor::_undo_redo_inspector_callback(Object *p_undo_redo, Object *p_edited, String p_property, Variant p_new_value) {
-	Ref<EditorUndoRedoManager> undo_redo_man = Object::cast_to<EditorUndoRedoManager>(p_undo_redo);
-	ERR_FAIL_COND(undo_redo_man.is_null());
+	EditorUndoRedoManager *undo_redo_man = Object::cast_to<EditorUndoRedoManager>(p_undo_redo);
+	ERR_FAIL_NULL(undo_redo_man);
 
 #define ADD_UNDO(obj, property) undo_redo_man->add_undo_property(obj, property, obj->get(property));
 	TileSet *ed_tile_set = Object::cast_to<TileSet>(p_edited);
diff --git a/editor/plugins/tiles/tile_set_scenes_collection_source_editor.cpp b/editor/plugins/tiles/tile_set_scenes_collection_source_editor.cpp
index 0ff8788626..8d48302f1a 100644
--- a/editor/plugins/tiles/tile_set_scenes_collection_source_editor.cpp
+++ b/editor/plugins/tiles/tile_set_scenes_collection_source_editor.cpp
@@ -237,7 +237,7 @@ void TileSetScenesCollectionSourceEditor::_scenes_list_item_activated(int p_inde
 
 void TileSetScenesCollectionSourceEditor::_source_add_pressed() {
 	int scene_id = tile_set_scenes_collection_source->get_next_scene_tile_id();
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->create_action(TTR("Add a Scene Tile"));
 	undo_redo->add_do_method(tile_set_scenes_collection_source, "create_scene_tile", Ref<PackedScene>(), scene_id);
 	undo_redo->add_undo_method(tile_set_scenes_collection_source, "remove_scene_tile", scene_id);
@@ -252,7 +252,7 @@ void TileSetScenesCollectionSourceEditor::_source_delete_pressed() {
 	ERR_FAIL_COND(selected_indices.size() <= 0);
 	int scene_id = scene_tiles_list->get_item_metadata(selected_indices[0]);
 
-	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->create_action(TTR("Remove a Scene Tile"));
 	undo_redo->add_do_method(tile_set_scenes_collection_source, "remove_scene_tile", scene_id);
 	undo_redo->add_undo_method(tile_set_scenes_collection_source, "create_scene_tile", tile_set_scenes_collection_source->get_scene_tile_scene(scene_id), scene_id);
@@ -404,7 +404,7 @@ void TileSetScenesCollectionSourceEditor::_drop_data_fw(const Point2 &p_point, c
 			Ref<PackedScene> resource = ResourceLoader::load(files[i]);
 			if (resource.is_valid()) {
 				int scene_id = tile_set_scenes_collection_source->get_next_scene_tile_id();
-				Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
+				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 				undo_redo->create_action(TTR("Add a Scene Tile"));
 				undo_redo->add_do_method(tile_set_scenes_collection_source, "create_scene_tile", resource, scene_id);
 				undo_redo->add_undo_method(tile_set_scenes_collection_source, "remove_scene_tile", scene_id);