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silverbullet/plugbox/environment/webworker_sandbox.ts

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import { safeRun } from "../util";
import { Sandbox } from "../sandbox";
import { System } from "../system";
import { WorkerLike } from "./worker";
class WebWorkerWrapper implements WorkerLike {
private worker: Worker;
onMessage?: (message: any) => Promise<void>;
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ready: Promise<void>;
constructor(worker: Worker) {
this.worker = worker;
this.worker.addEventListener("message", (evt: any) => {
let data = evt.data;
if (!data) return;
safeRun(async () => {
await this.onMessage!(data);
});
});
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this.ready = Promise.resolve();
}
postMessage(message: any): void {
this.worker.postMessage(message);
}
terminate() {
return this.worker.terminate();
}
}
export function createSandbox(system: System<any>) {
// ParcelJS will build this file into a worker.
let worker = new Worker(new URL("sandbox_worker.ts", import.meta.url), {
type: "module",
});
return new Sandbox(system, new WebWorkerWrapper(worker));
}