vscode-jsonrpc
Version:
A json rpc implementation over streams
133 lines (132 loc) • 4.81 kB
JavaScript
"use strict";
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CancellationTokenSource = exports.CancellationToken = void 0;
const ral_1 = __importDefault(require("./ral"));
const Is = __importStar(require("./is"));
const events_1 = require("./events");
var CancellationToken;
(function (CancellationToken) {
CancellationToken.None = Object.freeze({
isCancellationRequested: false,
onCancellationRequested: events_1.Event.None
});
CancellationToken.Cancelled = Object.freeze({
isCancellationRequested: true,
onCancellationRequested: events_1.Event.None
});
function is(value) {
const candidate = value;
return candidate && (candidate === CancellationToken.None
|| candidate === CancellationToken.Cancelled
|| (Is.boolean(candidate.isCancellationRequested) && !!candidate.onCancellationRequested));
}
CancellationToken.is = is;
})(CancellationToken || (exports.CancellationToken = CancellationToken = {}));
const shortcutEvent = Object.freeze(function (callback, context) {
const handle = (0, ral_1.default)().timer.setTimeout(callback.bind(context), 0);
return { dispose() { handle.dispose(); } };
});
class MutableToken {
_isCancelled = false;
_emitter;
cancel() {
if (!this._isCancelled) {
this._isCancelled = true;
if (this._emitter) {
this._emitter.fire(undefined);
this.dispose();
}
}
}
get isCancellationRequested() {
return this._isCancelled;
}
get onCancellationRequested() {
if (this._isCancelled) {
return shortcutEvent;
}
if (!this._emitter) {
this._emitter = new events_1.Emitter();
}
return this._emitter.event;
}
dispose() {
if (this._emitter) {
this._emitter.dispose();
this._emitter = undefined;
}
}
}
class CancellationTokenSource {
_token;
get token() {
if (!this._token) {
// be lazy and create the token only when
// actually needed
this._token = new MutableToken();
}
return this._token;
}
cancel() {
if (!this._token) {
// save an object by returning the default
// cancelled token when cancellation happens
// before someone asks for the token
this._token = CancellationToken.Cancelled;
}
else {
this._token.cancel();
}
}
dispose() {
if (!this._token) {
// ensure to initialize with an empty token if we had none
this._token = CancellationToken.None;
}
else if (this._token instanceof MutableToken) {
// actually dispose
this._token.dispose();
}
}
}
exports.CancellationTokenSource = CancellationTokenSource;