133 lines
4.7 KiB
Plaintext
133 lines
4.7 KiB
Plaintext
"use strict";
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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var desc = Object.getOwnPropertyDescriptor(m, k);
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if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
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desc = { enumerable: true, get: function() { return m[k]; } };
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}
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Object.defineProperty(o, k2, desc);
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}) : (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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o[k2] = m[k];
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}));
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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}) : function(o, v) {
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o["default"] = v;
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});
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var __importStar = (this && this.__importStar) || (function () {
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var ownKeys = function(o) {
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ownKeys = Object.getOwnPropertyNames || function (o) {
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var ar = [];
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for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
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return ar;
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};
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return ownKeys(o);
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};
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return function (mod) {
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if (mod && mod.__esModule) return mod;
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var result = {};
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if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
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__setModuleDefault(result, mod);
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return result;
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};
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})();
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.CancellationTokenSource = exports.CancellationToken = void 0;
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const ral_1 = __importDefault(require("./ral"));
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const Is = __importStar(require("./is"));
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const events_1 = require("./events");
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var CancellationToken;
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(function (CancellationToken) {
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CancellationToken.None = Object.freeze({
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isCancellationRequested: false,
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onCancellationRequested: events_1.Event.None
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});
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CancellationToken.Cancelled = Object.freeze({
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isCancellationRequested: true,
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onCancellationRequested: events_1.Event.None
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});
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function is(value) {
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const candidate = value;
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return candidate && (candidate === CancellationToken.None
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|| candidate === CancellationToken.Cancelled
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|| (Is.boolean(candidate.isCancellationRequested) && !!candidate.onCancellationRequested));
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}
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CancellationToken.is = is;
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})(CancellationToken || (exports.CancellationToken = CancellationToken = {}));
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const shortcutEvent = Object.freeze(function (callback, context) {
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const handle = (0, ral_1.default)().timer.setTimeout(callback.bind(context), 0);
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return { dispose() { handle.dispose(); } };
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});
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class MutableToken {
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_isCancelled = false;
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_emitter;
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cancel() {
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if (!this._isCancelled) {
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this._isCancelled = true;
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if (this._emitter) {
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this._emitter.fire(undefined);
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this.dispose();
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}
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}
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}
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get isCancellationRequested() {
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return this._isCancelled;
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}
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get onCancellationRequested() {
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if (this._isCancelled) {
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return shortcutEvent;
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}
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if (!this._emitter) {
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this._emitter = new events_1.Emitter();
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}
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return this._emitter.event;
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}
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dispose() {
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if (this._emitter) {
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this._emitter.dispose();
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this._emitter = undefined;
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}
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}
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}
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class CancellationTokenSource {
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_token;
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get token() {
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if (!this._token) {
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// be lazy and create the token only when
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// actually needed
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this._token = new MutableToken();
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}
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return this._token;
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}
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cancel() {
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if (!this._token) {
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// save an object by returning the default
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// cancelled token when cancellation happens
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// before someone asks for the token
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this._token = CancellationToken.Cancelled;
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}
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else {
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this._token.cancel();
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}
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}
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dispose() {
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if (!this._token) {
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// ensure to initialize with an empty token if we had none
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this._token = CancellationToken.None;
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}
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else if (this._token instanceof MutableToken) {
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// actually dispose
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this._token.dispose();
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}
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}
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}
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exports.CancellationTokenSource = CancellationTokenSource;
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