route - track conversion

website/src/lib/engine/backend/tauri.ts

@@ -83,6 +83,7 @@ export async function createTauriBackend(): Promise<Backend> {
             }),
         metadata: (name, desc) => invoke('metadata', { name, desc }),
         style: (color, opacity, width) => invoke('style', { color, opacity, width }),
+        convert: () => invoke('convert'),
         new_route: () => invoke('new_route'),
         new_track: () => invoke('new_track'),
         new_track_segment: () => invoke('new_track_segment'),

website/src/lib/engine/backend/types.ts

@@ -174,6 +174,7 @@ export interface Backend {
     move_elements(what: Selection, to: MoveTarget): Promise<Outcome>;
     metadata(name: string, desc: string): Promise<Outcome>;
     style(color?: string, opacity?: number, width?: number): Promise<Outcome>;
+    convert(): Promise<Outcome>;
     new_route(): Promise<Outcome>;
     new_track(): Promise<Outcome>;
     new_track_segment(): Promise<Outcome>;

website/src/lib/engine/backend/wasm.ts

@@ -79,6 +79,7 @@ export async function createWasmBackend(): Promise<Backend> {
         move_elements: lift(w.move_elements),
         metadata: lift(w.metadata),
         style: lift(w.style),
+        convert: lift(w.convert),
         new_route: lift(w.new_route),
         new_track: lift(w.new_track),
         new_track_segment: lift(w.new_track_segment),

website/src/lib/engine/engine.ts

@@ -365,6 +365,14 @@ class Engine {
 
     // Edits of the selection
 
+    /**
+     * Converts the selected routes to tracks, or the selected tracks or segments to routes (one
+     * per segment), which are selected. Resolves to `false` when there is nothing to convert.
+     */
+    convert() {
+        return this.run((b) => b.convert());
+    }
+
     /** Adds an empty route to the selected files. */
     newRoute() {
         return this.run((b) => b.new_route());