Merge from master

src/vs/base/parts/ipc/node/ipc.electron.ts

@@ -0,0 +1,42 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { IDisposable, dispose } from 'vs/base/common/lifecycle';
+import { IMessagePassingProtocol } from 'vs/base/parts/ipc/node/ipc';
+import { Event, Emitter } from 'vs/base/common/event';
+
+/**
+ * This implementation doesn't perform well since it uses base64 encoding for buffers.
+ * Electron 3.0 should have suport for buffers in IPC: https://github.com/electron/electron/pull/13055
+ */
+
+export interface Sender {
+	send(channel: string, msg: string | null): void;
+}
+
+export class Protocol implements IMessagePassingProtocol {
+
+	private listener: IDisposable;
+
+	private _onMessage = new Emitter<Buffer>();
+	get onMessage(): Event<Buffer> { return this._onMessage.event; }
+
+	constructor(private sender: Sender, onMessageEvent: Event<string>) {
+		onMessageEvent(msg => this._onMessage.fire(Buffer.from(msg, 'base64')));
+	}
+
+	send(message: Buffer): void {
+		try {
+			this.sender.send('ipc:message', message.toString('base64'));
+		} catch (e) {
+			// systems are going down
+		}
+	}
+
+	dispose(): void {
+		this.sender.send('ipc:disconnect', null);
+		this.listener = dispose(this.listener);
+	}
+}