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An unofficial VS Code Internal API

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/*--------------------------------------------------------------------------------------------- * Copyright (c) Microsoft Corporation. All rights reserved. * Licensed under the MIT License. See License.txt in the project root for license information. *--------------------------------------------------------------------------------------------*/ import { COI } from "../common/network.mjs"; import { globals } from "../common/platform.mjs"; import { logOnceWebWorkerWarning } from "../common/worker/simpleWorker.mjs"; const ttPolicy = window.trustedTypes?.createPolicy('defaultWorkerFactory', { createScriptURL: value => value }); function getWorker(label) { // Option for hosts to overwrite the worker script (used in the standalone editor) if (globals.MonacoEnvironment) { if (typeof globals.MonacoEnvironment.getWorker === 'function') { return globals.MonacoEnvironment.getWorker('workerMain.js', label); } if (typeof globals.MonacoEnvironment.getWorkerUrl === 'function') { const workerUrl = globals.MonacoEnvironment.getWorkerUrl('workerMain.js', label); return new Worker(ttPolicy ? ttPolicy.createScriptURL(workerUrl) : workerUrl, { name: label }); } } // ESM-comment-begin if (typeof require === 'function') { // check if the JS lives on a different origin const workerMain = require.toUrl('vs/base/worker/workerMain.js'); // explicitly using require.toUrl(), see https://github.com/microsoft/vscode/issues/107440#issuecomment-698982321 const workerUrl = getWorkerBootstrapUrl(workerMain, label); return new Worker(ttPolicy ? ttPolicy.createScriptURL(workerUrl) : workerUrl, { name: label }); } // ESM-comment-end throw new Error(`You must define a function MonacoEnvironment.getWorkerUrl or MonacoEnvironment.getWorker`); } // ESM-comment-begin export function getWorkerBootstrapUrl(scriptPath, label) { if (/^((http:)|(https:)|(file:))/.test(scriptPath) && scriptPath.substring(0, self.origin.length) !== self.origin) { // this is the cross-origin case // i.e. the webpage is running at a different origin than where the scripts are loaded from const myPath = 'vs/base/worker/defaultWorkerFactory.js'; const workerBaseUrl = require.toUrl(myPath).slice(0, -myPath.length); // explicitly using require.toUrl(), see https://github.com/microsoft/vscode/issues/107440#issuecomment-698982321 const js = `/*${label}*/self.MonacoEnvironment={baseUrl: '${workerBaseUrl}'};const ttPolicy = self.trustedTypes?.createPolicy('defaultWorkerFactory', { createScriptURL: value => value });importScripts(ttPolicy?.createScriptURL('${scriptPath}') ?? '${scriptPath}');/*${label}*/`; const blob = new Blob([js], { type: 'application/javascript' }); return URL.createObjectURL(blob); } const start = scriptPath.lastIndexOf('?'); const end = scriptPath.lastIndexOf('#', start); const params = start > 0 ? new URLSearchParams(scriptPath.substring(start + 1, ~end ? end : undefined)) : new URLSearchParams(); COI.addSearchParam(params, true, true); const search = params.toString(); if (!search) { return `${scriptPath}#${label}`; } else { return `${scriptPath}?${params.toString()}#${label}`; } } // ESM-comment-end function isPromiseLike(obj) { if (typeof obj.then === 'function') { return true; } return false; } /** * A worker that uses HTML5 web workers so that is has * its own global scope and its own thread. */ class WebWorker { id; worker; constructor(moduleId, id, label, onMessageCallback, onErrorCallback) { this.id = id; const workerOrPromise = getWorker(label); if (isPromiseLike(workerOrPromise)) { this.worker = workerOrPromise; } else { this.worker = Promise.resolve(workerOrPromise); } this.postMessage(moduleId, []); this.worker.then((w) => { w.onmessage = function (ev) { onMessageCallback(ev.data); }; w.onmessageerror = onErrorCallback; if (typeof w.addEventListener === 'function') { w.addEventListener('error', onErrorCallback); } }); } getId() { return this.id; } postMessage(message, transfer) { this.worker?.then(w => w.postMessage(message, transfer)); } dispose() { this.worker?.then(w => w.terminate()); this.worker = null; } } export class DefaultWorkerFactory { static LAST_WORKER_ID = 0; _label; _webWorkerFailedBeforeError; constructor(label) { this._label = label; this._webWorkerFailedBeforeError = false; } create(moduleId, onMessageCallback, onErrorCallback) { const workerId = (++DefaultWorkerFactory.LAST_WORKER_ID); if (this._webWorkerFailedBeforeError) { throw this._webWorkerFailedBeforeError; } return new WebWorker(moduleId, workerId, this._label || 'anonymous' + workerId, onMessageCallback, (err) => { logOnceWebWorkerWarning(err); this._webWorkerFailedBeforeError = err; onErrorCallback(err); }); } }