Implement anchor and handle point rendering with the Path Tool (#353)

* Implement Path Tool

* Draw a red rectangle where the first point on the shape is

* Correctly render anchors, handles, and connecting lines

* Fix drain() which can panic

* Refactor frontend messages to work as return values not callbacks

* Reduce the number of unnecessary frontend updates

* Fix stack overflow by using a loop

* Group Document Render calls and put them at the end

* Speed hacks for dirtification

* Add performance

* Bunch folder changed updates

* Add triggers to redraw overlays to movement_handler

* Polish the pixel-perfect rendering of vector manipulators

* Restore scrollbars that were disabled

* Cleanup

* WIP Add shape outline rendering

* Fix compiling

* Add outlines to selected shapes

* Fix outlines rendering over handles and anchors

* Fix dirtification

* Add a comment

* Address code review feedback

* Formatting

* Small tweaks

Co-authored-by: Oliver Davies <oliver@psyfer.io>
Co-authored-by: Dennis Kobert <dennis@kobert.dev>

graphene/src/operation.rs

@@ -20,13 +20,18 @@ pub enum Operation {
 		transform: [f64; 6],
 		style: style::PathStyle,
 	},
+	AddOverlayEllipse {
+		path: Vec<LayerId>,
+		transform: [f64; 6],
+		style: style::PathStyle,
+	},
 	AddRect {
 		path: Vec<LayerId>,
 		insert_index: isize,
 		transform: [f64; 6],
 		style: style::PathStyle,
 	},
-	AddBoundingBox {
+	AddOverlayRect {
 		path: Vec<LayerId>,
 		transform: [f64; 6],
 		style: style::PathStyle,
@@ -37,6 +42,11 @@ pub enum Operation {
 		transform: [f64; 6],
 		style: style::PathStyle,
 	},
+	AddOverlayLine {
+		path: Vec<LayerId>,
+		transform: [f64; 6],
+		style: style::PathStyle,
+	},
 	AddPen {
 		path: Vec<LayerId>,
 		transform: [f64; 6],
@@ -44,13 +54,18 @@ pub enum Operation {
 		points: Vec<(f64, f64)>,
 		style: style::PathStyle,
 	},
-	AddShape {
+	AddNgon {
 		path: Vec<LayerId>,
 		insert_index: isize,
 		transform: [f64; 6],
 		sides: u8,
 		style: style::PathStyle,
 	},
+	AddOverlayShape {
+		path: Vec<LayerId>,
+		bez_path: kurbo::BezPath,
+		style: style::PathStyle,
+	},
 	DeleteLayer {
 		path: Vec<LayerId>,
 	},
@@ -81,6 +96,11 @@ pub enum Operation {
 		path: Vec<LayerId>,
 		transform: [f64; 6],
 	},
+	SetShapePathInViewport {
+		path: Vec<LayerId>,
+		bez_path: kurbo::BezPath,
+		transform: [f64; 6],
+	},
 	TransformLayerInScope {
 		path: Vec<LayerId>,
 		transform: [f64; 6],
@@ -95,9 +115,13 @@ pub enum Operation {
 		path: Vec<LayerId>,
 		transform: [f64; 6],
 	},
-	ToggleVisibility {
+	ToggleLayerVisibility {
 		path: Vec<LayerId>,
 	},
+	SetLayerVisibility {
+		path: Vec<LayerId>,
+		visible: bool,
+	},
 	SetLayerBlendMode {
 		path: Vec<LayerId>,
 		blend_mode: BlendMode,
@@ -106,7 +130,11 @@ pub enum Operation {
 		path: Vec<LayerId>,
 		opacity: f64,
 	},
-	FillLayer {
+	SetLayerStyle {
+		path: Vec<LayerId>,
+		style: style::PathStyle,
+	},
+	SetLayerFill {
 		path: Vec<LayerId>,
 		color: Color,
 	},