Insert pasted images as layers in document graph (#1418)

Changes:

Graph is evaluated on every viewport change
move all navigation logic into the viewport
reduce the number of js roundtrips
add canvas rendering
enable image pasting
various cleanups
Fix cache nodes being reset every evaluation

editor/src/messages/tool/common_functionality/graph_modification_utils.rs

@@ -4,8 +4,10 @@ use crate::messages::prelude::*;
 use bezier_rs::{ManipulatorGroup, Subpath};
 use document_legacy::{document::Document, document_metadata::LayerNodeIdentifier, LayerId, Operation};
 use graph_craft::document::{value::TaggedValue, DocumentNode, NodeId, NodeInput, NodeNetwork};
+use graphene_core::raster::ImageFrame;
 use graphene_core::uuid::ManipulatorGroupId;
 use graphene_core::vector::style::{FillType, Gradient};
+use graphene_core::Color;
 
 use glam::DAffine2;
 use std::collections::VecDeque;
@@ -18,6 +20,14 @@ pub fn new_vector_layer(subpaths: Vec<Subpath<ManipulatorGroupId>>, layer_path:
 	});
 }
 
+/// Creat a new bitmap layer from an [`graphene_core::raster::ImageFrame<Color>`]
+pub fn new_image_layer(image_frame: ImageFrame<Color>, layer_path: Vec<LayerId>, responses: &mut VecDeque<Message>) {
+	responses.add(GraphOperationMessage::NewBitmapLayer {
+		id: *layer_path.last().unwrap(),
+		image_frame,
+	});
+}
+
 /// Create a legacy node graph frame TODO: remove
 pub fn new_custom_layer(network: NodeNetwork, layer_path: Vec<LayerId>, responses: &mut VecDeque<Message>) {
 	responses.add(DocumentMessage::DeselectAllLayers);

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

@@ -393,8 +393,7 @@ impl Fsm for PathToolFsmState {
 				};
 				remove_bounding_box(tool_data.drag_box_overlay_layer.take(), responses);
 
-					PathToolFsmState::Ready
-
+				PathToolFsmState::Ready
 			}
 
 			// Mouse up
@@ -410,7 +409,8 @@ impl Fsm for PathToolFsmState {
 				remove_bounding_box(tool_data.drag_box_overlay_layer.take(), responses);
 
 				responses.add(PathToolMessage::SelectedPointUpdated);
-				}
+				PathToolFsmState::Ready
+			}
 
 			(_, PathToolMessage::DragStop { shift_mirror_distance }) => {
 				let shift_pressed = input.keyboard.get(shift_mirror_distance as usize);