Code cleanup and refactor for generalized layers (#1738)

* Move functions to messages to fix undo bugs for UnGroup and Group

* Copy+Paste for generalized layer nodes

* Fix MoveSelectedLayersTo and GroupSelectedLayers by extracting functions into messages

* Fix tests, replace FrontendMessage:TriggerPaste with PortfolioMessage::PasteIntoFolder

* Formatting

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/messages/tool/tool_messages/brush_tool.rs

@@ -420,7 +420,7 @@ fn new_brush_layer(document: &DocumentMessageHandler, responses: &mut VecDeque<M
 	responses.add(GraphOperationMessage::NewCustomLayer {
 		id,
 		nodes: HashMap::from([(NodeId(0), brush_node)]),
-		parent: document.new_layer_parent(),
+		parent: document.new_layer_parent(true),
 		insert_index: -1,
 		alias: String::new(),
 	});

editor/src/messages/tool/tool_messages/ellipse_tool.rs

@@ -202,7 +202,7 @@ impl Fsm for EllipseToolFsmState {
 				// Create a new ellipse vector shape
 				let subpath = bezier_rs::Subpath::new_ellipse(DVec2::ZERO, DVec2::ONE);
 				let manipulator_groups = subpath.manipulator_groups().to_vec();
-				let layer = graph_modification_utils::new_vector_layer(vec![subpath], NodeId(generate_uuid()), document.new_layer_parent(), responses);
+				let layer = graph_modification_utils::new_vector_layer(vec![subpath], NodeId(generate_uuid()), document.new_layer_parent(true), responses);
 				graph_modification_utils::set_manipulator_colinear_handles_state(&manipulator_groups, layer, true, responses);
 				shape_data.layer = Some(layer);
 

editor/src/messages/tool/tool_messages/freehand_tool.rs

@@ -230,7 +230,7 @@ impl Fsm for FreehandToolFsmState {
 				} else {
 					responses.add(DocumentMessage::DeselectAllLayers);
 
-					let parent = document.new_layer_parent();
+					let parent = document.new_layer_parent(true);
 					let transform = document.metadata().transform_to_viewport(parent);
 					let pos = transform.inverse().transform_point2(input.mouse.position);
 					let subpath = bezier_rs::Subpath::from_anchors([pos], false);

editor/src/messages/tool/tool_messages/line_tool.rs

@@ -181,7 +181,7 @@ impl Fsm for LineToolFsmState {
 
 				responses.add(DocumentMessage::StartTransaction);
 
-				let layer = graph_modification_utils::new_vector_layer(vec![subpath], NodeId(generate_uuid()), document.new_layer_parent(), responses);
+				let layer = graph_modification_utils::new_vector_layer(vec![subpath], NodeId(generate_uuid()), document.new_layer_parent(true), responses);
 				responses.add(GraphOperationMessage::StrokeSet {
 					layer,
 					stroke: Stroke::new(tool_options.stroke.active_color(), tool_options.line_weight),

editor/src/messages/tool/tool_messages/pen_tool.rs

@@ -232,7 +232,7 @@ impl PenToolData {
 		input: &InputPreprocessorMessageHandler,
 		responses: &mut VecDeque<Message>,
 	) {
-		let parent = document.new_layer_parent();
+		let parent = document.new_layer_parent(true);
 		// Deselect layers because we are now creating a new layer
 		responses.add(DocumentMessage::DeselectAllLayers);
 

editor/src/messages/tool/tool_messages/polygon_tool.rs

@@ -247,7 +247,7 @@ impl Fsm for PolygonToolFsmState {
 					PolygonType::Convex => bezier_rs::Subpath::new_regular_polygon(DVec2::ZERO, tool_options.vertices as u64, 1.),
 					PolygonType::Star => bezier_rs::Subpath::new_star_polygon(DVec2::ZERO, tool_options.vertices as u64, 1., 0.5),
 				};
-				let layer = graph_modification_utils::new_vector_layer(vec![subpath], NodeId(generate_uuid()), document.new_layer_parent(), responses);
+				let layer = graph_modification_utils::new_vector_layer(vec![subpath], NodeId(generate_uuid()), document.new_layer_parent(true), responses);
 				polygon_data.layer = Some(layer);
 
 				let fill_color = tool_options.fill.active_color();

editor/src/messages/tool/tool_messages/rectangle_tool.rs

@@ -209,7 +209,7 @@ impl Fsm for RectangleToolFsmState {
 
 				responses.add(DocumentMessage::StartTransaction);
 
-				let layer = graph_modification_utils::new_vector_layer(vec![subpath], NodeId(generate_uuid()), document.new_layer_parent(), responses);
+				let layer = graph_modification_utils::new_vector_layer(vec![subpath], NodeId(generate_uuid()), document.new_layer_parent(true), responses);
 				shape_data.layer = Some(layer);
 
 				let fill_color = tool_options.fill.active_color();

editor/src/messages/tool/tool_messages/spline_tool.rs

@@ -208,7 +208,7 @@ impl Fsm for SplineToolFsmState {
 				responses.add(DocumentMessage::StartTransaction);
 				responses.add(DocumentMessage::DeselectAllLayers);
 
-				let parent = document.new_layer_parent();
+				let parent = document.new_layer_parent(true);
 				let transform = document.metadata().transform_to_viewport(parent);
 
 				//tool_data.snap_manager.start_snap(document, input, document.bounding_boxes(), true, true);

editor/src/messages/tool/tool_messages/text_tool.rs

@@ -283,7 +283,7 @@ impl TextToolData {
 				text: String::new(),
 				font: editing_text.font.clone(),
 				size: editing_text.font_size,
-				parent: document.new_layer_parent(),
+				parent: document.new_layer_parent(true),
 				insert_index: -1,
 			});
 			responses.add(GraphOperationMessage::FillSet {