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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 { BrowserWindow, Event as ElectronEvent, IpcMainEvent, MessagePortMain } from 'electron';
import { validatedIpcMain } from 'vs/base/parts/ipc/electron-main/ipcMain';
import { Barrier } from 'vs/base/common/async';
import { Emitter, Event } from 'vs/base/common/event';
import { Disposable, DisposableStore } from 'vs/base/common/lifecycle';
import { FileAccess } from 'vs/base/common/network';
import { IProcessEnvironment } from 'vs/base/common/platform';
import { assertIsDefined } from 'vs/base/common/types';
import { connect as connectMessagePort } from 'vs/base/parts/ipc/electron-main/ipc.mp';
import { IEnvironmentMainService } from 'vs/platform/environment/electron-main/environmentMainService';
import { ILifecycleMainService } from 'vs/platform/lifecycle/electron-main/lifecycleMainService';
import { ILogService } from 'vs/platform/log/common/log';
import product from 'vs/platform/product/common/product';
import { IProtocolMainService } from 'vs/platform/protocol/electron-main/protocol';
import { ISharedProcess, ISharedProcessConfiguration } from 'vs/platform/sharedProcess/node/sharedProcess';
import { ISharedProcessWorkerConfiguration } from 'vs/platform/sharedProcess/common/sharedProcessWorkerService';
import { IThemeMainService } from 'vs/platform/theme/electron-main/themeMainService';
import { WindowError } from 'vs/platform/window/electron-main/window';
import { toErrorMessage } from 'vs/base/common/errorMessage';
export class SharedProcess extends Disposable implements ISharedProcess {
private readonly firstWindowConnectionBarrier = new Barrier();
private window: BrowserWindow | undefined = undefined;
private windowCloseListener: ((event: ElectronEvent) => void) | undefined = undefined;
private readonly _onDidError = this._register(new Emitter<{ type: WindowError; details?: { reason: string; exitCode: number } }>());
readonly onDidError = Event.buffer(this._onDidError.event); // buffer until we have a listener!
constructor(
private readonly machineId: string,
private userEnv: IProcessEnvironment,
@IEnvironmentMainService private readonly environmentMainService: IEnvironmentMainService,
@ILifecycleMainService private readonly lifecycleMainService: ILifecycleMainService,
@ILogService private readonly logService: ILogService,
@IThemeMainService private readonly themeMainService: IThemeMainService,
@IProtocolMainService private readonly protocolMainService: IProtocolMainService
) {
super();
this.registerListeners();
}
private registerListeners(): void {
// Shared process connections from workbench windows
validatedIpcMain.on('vscode:createSharedProcessMessageChannel', (e, nonce: string) => this.onWindowConnection(e, nonce));
// Shared process worker relay
validatedIpcMain.on('vscode:relaySharedProcessWorkerMessageChannel', (e, configuration: ISharedProcessWorkerConfiguration) => this.onWorkerConnection(e, configuration));
// Lifecycle
this._register(this.lifecycleMainService.onWillShutdown(() => this.onWillShutdown()));
}
private async onWindowConnection(e: IpcMainEvent, nonce: string): Promise<void> {
this.logService.trace('SharedProcess: on vscode:createSharedProcessMessageChannel');
// release barrier if this is the first window connection
if (!this.firstWindowConnectionBarrier.isOpen()) {
this.firstWindowConnectionBarrier.open();
}
// await the shared process to be overall ready
// we do not just wait for IPC ready because the
// workbench window will communicate directly
await this.whenReady();
// connect to the shared process window
const port = await this.connect();
// Check back if the requesting window meanwhile closed
// Since shared process is delayed on startup there is
// a chance that the window close before the shared process
// was ready for a connection.
if (e.sender.isDestroyed()) {
return port.close();
}
// send the port back to the requesting window
e.sender.postMessage('vscode:createSharedProcessMessageChannelResult', nonce, [port]);
}
private onWorkerConnection(e: IpcMainEvent, configuration: ISharedProcessWorkerConfiguration): void {
this.logService.trace('SharedProcess: onWorkerConnection', configuration);
const disposables = new DisposableStore();
const disposeWorker = (reason: string) => {
if (!this.isAlive()) {
return; // the shared process is already gone, no need to dispose anything
}
this.logService.trace(`SharedProcess: disposing worker (reason: '${reason}')`, configuration);
// Only once!
disposables.dispose();
// Send this into the shared process who owns workers
this.send('vscode:electron-main->shared-process=disposeWorker', configuration);
};
// Ensure the sender is a valid target to send to
const receiverWindow = BrowserWindow.fromId(configuration.reply.windowId);
if (!receiverWindow || receiverWindow.isDestroyed() || receiverWindow.webContents.isDestroyed() || !configuration.reply.channel) {
disposeWorker('unavailable');
return;
}
// Attach to lifecycle of receiver to manage worker lifecycle
disposables.add(Event.filter(this.lifecycleMainService.onWillLoadWindow, e => e.window.win === receiverWindow)(() => disposeWorker('load')));
disposables.add(Event.fromNodeEventEmitter(receiverWindow, 'closed')(() => disposeWorker('closed')));
// The shared process window asks us to relay a `MessagePort`
// from a shared process worker to the target window. It needs
// to be send via `postMessage` to transfer the port.
receiverWindow.webContents.postMessage(configuration.reply.channel, configuration.reply.nonce, e.ports);
}
private onWillShutdown(): void {
const window = this.window;
if (!window) {
return; // possibly too early before created
}
// Signal exit to shared process when shutting down
this.send('vscode:electron-main->shared-process=exit');
// 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.windowCloseListener) {
window.removeListener('close', this.windowCloseListener);
this.windowCloseListener = undefined;
}
// Electron seems to crash on Windows without this setTimeout :|
setTimeout(() => {
try {
window.close();
} catch (err) {
// ignore, as electron is already shutting down
}
this.window = undefined;
}, 0);
}
private send(channel: string, ...args: any[]): void {
if (!this.isAlive()) {
this.logService.warn(`Sending IPC message to channel '${channel}' for shared process window that is destroyed`);
return;
}
try {
this.window?.webContents.send(channel, ...args);
} catch (error) {
this.logService.warn(`Error sending IPC message to channel '${channel}' of shared process: ${toErrorMessage(error)}`);
}
}
private _whenReady: Promise<void> | undefined = undefined;
whenReady(): Promise<void> {
if (!this._whenReady) {
// Overall signal that the shared process window was loaded and
// all services within have been created.
this._whenReady = new Promise<void>(resolve => validatedIpcMain.once('vscode:shared-process->electron-main=init-done', () => {
this.logService.trace('SharedProcess: Overall ready');
resolve();
}));
}
return this._whenReady;
}
private _whenIpcReady: Promise<void> | undefined = undefined;
private get whenIpcReady() {
if (!this._whenIpcReady) {
this._whenIpcReady = (async () => {
// Always wait for first window asking for connection
await this.firstWindowConnectionBarrier.wait();
// Create window for shared process
this.createWindow();
// Listeners
this.registerWindowListeners();
// Wait for window indicating that IPC connections are accepted
await new Promise<void>(resolve => validatedIpcMain.once('vscode:shared-process->electron-main=ipc-ready', () => {
this.logService.trace('SharedProcess: IPC ready');
resolve();
}));
})();
}
return this._whenIpcReady;
}
private createWindow(): void {
const configObjectUrl = this._register(this.protocolMainService.createIPCObjectUrl<ISharedProcessConfiguration>());
// shared process is a hidden window by default
this.window = new BrowserWindow({
show: false,
backgroundColor: this.themeMainService.getBackgroundColor(),
webPreferences: {
preload: FileAccess.asFileUri('vs/base/parts/sandbox/electron-browser/preload.js', require).fsPath,
additionalArguments: [`--vscode-window-config=${configObjectUrl.resource.toString()}`, '--vscode-window-kind=shared-process'],
v8CacheOptions: this.environmentMainService.useCodeCache ? 'bypassHeatCheck' : 'none',
nodeIntegration: true,
nodeIntegrationInWorker: true,
contextIsolation: false,
enableWebSQL: false,
spellcheck: false,
nativeWindowOpen: true,
images: false,
webgl: false
}
});
// Store into config object URL
configObjectUrl.update({
machineId: this.machineId,
windowId: this.window.id,
appRoot: this.environmentMainService.appRoot,
codeCachePath: this.environmentMainService.codeCachePath,
backupWorkspacesPath: this.environmentMainService.backupWorkspacesPath,
userEnv: this.userEnv,
args: this.environmentMainService.args,
logLevel: this.logService.getLevel(),
product
});
// Load with config
this.window.loadURL(FileAccess.asBrowserUri('vs/code/electron-browser/sharedProcess/sharedProcess.html', require).toString(true));
}
private registerWindowListeners(): void {
if (!this.window) {
return;
}
// Prevent the window from closing
this.windowCloseListener = (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?.isVisible()) {
this.window.hide();
}
};
this.window.on('close', this.windowCloseListener);
// Crashes & Unresponsive & Failed to load
// We use `onUnexpectedError` explicitly because the error handler
// will send the error to the active window to log in devtools too
this.window.webContents.on('render-process-gone', (event, details) => this._onDidError.fire({ type: WindowError.CRASHED, details }));
this.window.on('unresponsive', () => this._onDidError.fire({ type: WindowError.UNRESPONSIVE }));
this.window.webContents.on('did-fail-load', (event, exitCode, reason) => this._onDidError.fire({ type: WindowError.LOAD, details: { reason, exitCode } }));
}
async connect(): Promise<MessagePortMain> {
// Wait for shared process being ready to accept connection
await this.whenIpcReady;
// Connect and return message port
const window = assertIsDefined(this.window);
return connectMessagePort(window);
}
async toggle(): Promise<void> {
// wait for window to be created
await this.whenIpcReady;
if (!this.window) {
return; // possibly disposed already
}
if (this.window.isVisible()) {
this.window.webContents.closeDevTools();
this.window.hide();
} else {
this.window.show();
this.window.webContents.openDevTools();
}
}
isVisible(): boolean {
return this.window?.isVisible() ?? false;
}
private isAlive(): boolean {
const window = this.window;
if (!window) {
return false;
}
return !window.isDestroyed() && !window.webContents.isDestroyed();
}
}