Path Tool: Implement anchor point dragging (#451)

* #82 path-tool: WIP selecting control point working

* Fix bug where duplication with Ctrl+D doesn't properly duplicate (#423)

* bug fix: duplication didn't properly duplicate

* cargo fmt

* changed the formatting slightly for readability

* Small cleanups, changed color of handles upon selection

* Fix changes from merge

* Remove duplicate anchor points on top of one another

* Fix possible issues with thumbnails not being updated from Graphene operations

* path-tool: attempt to move control points on click

* Add dragging for control points

* Editing shape anchors functional. Handles next.

* Comment cleanup & slight cleanup of closest_anchor(..)

* Removing conflict with master

* Tiny code tweaks

Co-authored-by: Keavon Chambers <keavon@keavon.com>
Co-authored-by: caleb <56044292+caleb-ad@users.noreply.github.com>
Co-authored-by: otdavies <oliver@psyfer.io>
Co-authored-by: Dennis <dennis@kobert.dev>

editor/src/document/document_file.rs

@@ -55,8 +55,15 @@ pub enum VectorManipulatorSegment {
 
 #[derive(PartialEq, Clone, Debug)]
 pub struct VectorManipulatorShape {
+	/// The path to the layer
+	pub layer_path: Vec<LayerId>,
+	/// The outline of the shape
 	pub path: kurbo::BezPath,
+	/// The control points / manipulator handles
 	pub segments: Vec<VectorManipulatorSegment>,
+	/// The compound Bezier curve is closed
+	pub closed: bool,
+	/// The transformation matrix to apply
 	pub transform: DAffine2,
 }
 
@@ -266,9 +273,11 @@ impl DocumentMessageHandler {
 				.collect::<Vec<VectorManipulatorSegment>>();
 
 			Some(VectorManipulatorShape {
+				layer_path: path_to_shape.to_vec(),
 				path,
 				segments,
 				transform: viewport_transform,
+				closed: shape.closed,
 			})
 		});