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sharedProcess.ts
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sharedProcess.ts
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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { assign } from 'vs/base/common/objects';
import { memoize } from 'vs/base/common/decorators';
import { IEnvironmentService } from 'vs/platform/environment/common/environment';
import { BrowserWindow, ipcMain, WebContents, Event as ElectronEvent } from 'electron';
import { ISharedProcess } from 'vs/platform/ipc/electron-main/sharedProcessMainService';
import { Barrier } from 'vs/base/common/async';
import { ILogService } from 'vs/platform/log/common/log';
import { ILifecycleMainService } from 'vs/platform/lifecycle/electron-main/lifecycleMainService';
import { IThemeMainService } from 'vs/platform/theme/electron-main/themeMainService';
import { toDisposable, DisposableStore } from 'vs/base/common/lifecycle';
import { Event } from 'vs/base/common/event';
export class SharedProcess implements ISharedProcess {
private barrier = new Barrier();
private window: BrowserWindow | null = null;
private readonly _whenReady: Promise<void>;
constructor(
private readonly machineId: string,
private userEnv: NodeJS.ProcessEnv,
@IEnvironmentService private readonly environmentService: IEnvironmentService,
@ILifecycleMainService private readonly lifecycleMainService: ILifecycleMainService,
@ILogService private readonly logService: ILogService,
@IThemeMainService private readonly themeMainService: IThemeMainService
) {
// overall ready promise when shared process signals initialization is done
this._whenReady = new Promise<void>(c => ipcMain.once('shared-process->electron-main: init-done', () => c(undefined)));
}
@memoize
private get _whenIpcReady(): Promise<void> {
this.window = new BrowserWindow({
show: false,
backgroundColor: this.themeMainService.getBackgroundColor(),
webPreferences: {
images: false,
nodeIntegration: true,
webgl: false,
disableBlinkFeatures: 'Auxclick' // do NOT change, allows us to identify this window as shared-process in the process explorer
}
});
const config = assign({
appRoot: this.environmentService.appRoot,
machineId: this.machineId,
nodeCachedDataDir: this.environmentService.nodeCachedDataDir,
userEnv: this.userEnv,
windowId: this.window.id
});
const url = `${require.toUrl('vs/code/electron-browser/sharedProcess/sharedProcess.html')}?config=${encodeURIComponent(JSON.stringify(config))}`;
this.window.loadURL(url);
// Prevent the window from dying
const onClose = (e: ElectronEvent) => {
this.logService.trace('SharedProcess#close prevented');
// We never allow to close the shared process unless we get explicitly disposed()
e.preventDefault();
// Still hide the window though if visible
if (this.window && this.window.isVisible()) {
this.window.hide();
}
};
this.window.on('close', onClose);
const disposables = new DisposableStore();
this.lifecycleMainService.onWillShutdown(() => {
disposables.dispose();
// Shut the shared process down when we are quitting
//
// Note: because we veto the window close, we must first remove our veto.
// Otherwise the application would never quit because the shared process
// window is refusing to close!
//
if (this.window) {
this.window.removeListener('close', onClose);
}
// Electron seems to crash on Windows without this setTimeout :|
setTimeout(() => {
try {
if (this.window) {
this.window.close();
}
} catch (err) {
// ignore, as electron is already shutting down
}
this.window = null;
}, 0);
});
return new Promise<void>(c => {
// send payload once shared process is ready to receive it
disposables.add(Event.once(Event.fromNodeEventEmitter(ipcMain, 'shared-process->electron-main: ready-for-payload', ({ sender }: { sender: WebContents }) => sender))(sender => {
sender.send('electron-main->shared-process: payload', {
sharedIPCHandle: this.environmentService.sharedIPCHandle,
args: this.environmentService.args,
logLevel: this.logService.getLevel()
});
// signal exit to shared process when we get disposed
disposables.add(toDisposable(() => sender.send('electron-main->shared-process: exit')));
// complete IPC-ready promise when shared process signals this to us
ipcMain.once('shared-process->electron-main: ipc-ready', () => c(undefined));
}));
});
}
spawn(userEnv: NodeJS.ProcessEnv): void {
this.userEnv = { ...this.userEnv, ...userEnv };
this.barrier.open();
}
async whenReady(): Promise<void> {
await this.barrier.wait();
await this._whenReady;
}
async whenIpcReady(): Promise<void> {
await this.barrier.wait();
await this._whenIpcReady;
}
toggle(): void {
if (!this.window || this.window.isVisible()) {
this.hide();
} else {
this.show();
}
}
show(): void {
if (this.window) {
this.window.show();
this.window.webContents.openDevTools();
}
}
hide(): void {
if (this.window) {
this.window.webContents.closeDevTools();
this.window.hide();
}
}
}