Added checks to remove meta arrays when creating and undoing guides

Added checks to remove meta arrays when creating and undoing guides

Update editor/plugins/canvas_item_editor_plugin.cpp

Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com>

Update editor/plugins/canvas_item_editor_plugin.cpp

Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com>

editor/plugins/canvas_item_editor_plugin.cpp

@@ -1155,7 +1155,11 @@ bool CanvasItemEditor::_gui_input_rulers_and_guides(const Ref<InputEvent> &p_eve
 							vguides.push_back(edited.x);
 							undo_redo->create_action(TTR("Create Vertical Guide"));
 							undo_redo->add_do_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_vertical_guides_", vguides);
-							undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_vertical_guides_", prev_vguides);
+							if (prev_vguides.is_empty()) {
+								undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "remove_meta", "_edit_vertical_guides_");
+							} else {
+								undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_vertical_guides_", prev_vguides);
+							}
 							undo_redo->add_undo_method(viewport, "queue_redraw");
 							undo_redo->commit_action();
 						}
@@ -1188,7 +1192,11 @@ bool CanvasItemEditor::_gui_input_rulers_and_guides(const Ref<InputEvent> &p_eve
 							hguides.push_back(edited.y);
 							undo_redo->create_action(TTR("Create Horizontal Guide"));
 							undo_redo->add_do_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_horizontal_guides_", hguides);
-							undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_horizontal_guides_", prev_hguides);
+							if (prev_hguides.is_empty()) {
+								undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "remove_meta", "_edit_horizontal_guides_");
+							} else {
+								undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_horizontal_guides_", prev_hguides);
+							}
 							undo_redo->add_undo_method(viewport, "queue_redraw");
 							undo_redo->commit_action();
 						}
@@ -1216,8 +1224,16 @@ bool CanvasItemEditor::_gui_input_rulers_and_guides(const Ref<InputEvent> &p_eve
 						undo_redo->create_action(TTR("Create Horizontal and Vertical Guides"));
 						undo_redo->add_do_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_vertical_guides_", vguides);
 						undo_redo->add_do_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_horizontal_guides_", hguides);
-						undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_vertical_guides_", prev_vguides);
-						undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_horizontal_guides_", prev_hguides);
+						if (prev_vguides.is_empty()) {
+							undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "remove_meta", "_edit_vertical_guides_");
+						} else {
+							undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_vertical_guides_", prev_vguides);
+						}
+						if (prev_hguides.is_empty()) {
+							undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "remove_meta", "_edit_horizontal_guides_");
+						} else {
+							undo_redo->add_undo_method(EditorNode::get_singleton()->get_edited_scene(), "set_meta", "_edit_horizontal_guides_", prev_hguides);
+						}
 						undo_redo->add_undo_method(viewport, "queue_redraw");
 						undo_redo->commit_action();
 					}