monaco-editor
Version:
A browser based code editor
106 lines (105 loc) • 5 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
var _a;
import { globals } from '../common/platform.js';
import { logOnceWebWorkerWarning } from '../common/worker/simpleWorker.js';
const ttPolicy = (_a = window.trustedTypes) === null || _a === void 0 ? void 0 : _a.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) 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, 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);
// }
// return scriptPath + '#' + 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 {
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) {
var _a;
(_a = this.worker) === null || _a === void 0 ? void 0 : _a.then(w => w.postMessage(message, transfer));
}
dispose() {
var _a;
(_a = this.worker) === null || _a === void 0 ? void 0 : _a.then(w => w.terminate());
this.worker = null;
}
}
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;