monaco-editor
Version:
A browser based code editor
136 lines (135 loc) • 6.01 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { createTrustedTypesPolicy } from './trustedTypes.js';
import { onUnexpectedError } from '../common/errors.js';
import { logOnceWebWorkerWarning } from '../common/worker/simpleWorker.js';
import { Disposable, toDisposable } from '../common/lifecycle.js';
const ttPolicy = createTrustedTypesPolicy('defaultWorkerFactory', { createScriptURL: value => value });
function getWorker(label) {
const monacoEnvironment = globalThis.MonacoEnvironment;
if (monacoEnvironment) {
if (typeof monacoEnvironment.getWorker === 'function') {
return monacoEnvironment.getWorker('workerMain.js', label);
}
if (typeof monacoEnvironment.getWorkerUrl === 'function') {
const workerUrl = 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) as unknown as string : 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: string, label: string): string {
// if (/^((http:)|(https:)|(file:))/.test(scriptPath) && scriptPath.substring(0, globalThis.origin.length) !== globalThis.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 = `/*${label}*/globalThis.MonacoEnvironment={baseUrl: '${workerBaseUrl}'};const ttPolicy = globalThis.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 extends Disposable {
constructor(moduleId, id, label, onMessageCallback, onErrorCallback) {
super();
this.id = id;
this.label = label;
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);
}
});
this._register(toDisposable(() => {
var _a;
(_a = this.worker) === null || _a === void 0 ? void 0 : _a.then(w => {
w.onmessage = null;
w.onmessageerror = null;
w.removeEventListener('error', onErrorCallback);
w.terminate();
});
this.worker = null;
}));
}
getId() {
return this.id;
}
postMessage(message, transfer) {
var _a;
(_a = this.worker) === null || _a === void 0 ? void 0 : _a.then(w => {
try {
w.postMessage(message, transfer);
}
catch (err) {
onUnexpectedError(err);
onUnexpectedError(new Error(`FAILED to post message to '${this.label}'-worker`, { cause: err }));
}
});
}
}
export class DefaultWorkerFactory {
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);
});
}
}
DefaultWorkerFactory.LAST_WORKER_ID = 0;