ATL-667: Warn the user when could not save sketch.

- Log the PID of the backend process.
 - Aligned the dev startup mode with the production: `--no-cluster`.

Signed-off-by: Akos Kitta <kittaakos@typefox.io>

.vscode/launch.json

@@ -34,7 +34,6 @@
       "args": [
         "--log-level=debug",
         "--hostname=localhost",
-        "--no-cluster",
         "--remote-debugging-port=9222",
         "--no-app-auto-install",
         "--plugins=local-dir:plugins"
@@ -61,7 +60,6 @@
       "args": [
         "--hostname=0.0.0.0",
         "--port=3000",
-        "--no-cluster",
         "--no-app-auto-install",
         "--plugins=local-dir:plugins"
       ],

arduino-ide-extension/src/browser/theia/core/application-shell.ts

@@ -2,7 +2,9 @@
 import { injectable, inject } from 'inversify';
 import { EditorWidget } from '@theia/editor/lib/browser';
 import { CommandService } from '@theia/core/lib/common/command';
+import { MessageService } from '@theia/core/lib/common/message-service';
 import { OutputWidget } from '@theia/output/lib/browser/output-widget';
+import { ConnectionStatusService, ConnectionStatus } from '@theia/core/lib/browser/connection-status-service';
 import { ApplicationShell as TheiaApplicationShell, Widget } from '@theia/core/lib/browser';
 import { Sketch } from '../../../common/protocol';
 import { EditorMode } from '../../editor-mode';
@@ -18,9 +20,15 @@ export class ApplicationShell extends TheiaApplicationShell {
     @inject(CommandService)
     protected readonly commandService: CommandService;
 
+    @inject(MessageService)
+    protected readonly messageService: MessageService;
+
     @inject(SketchesServiceClientImpl)
     protected readonly sketchesServiceClient: SketchesServiceClientImpl;
 
+    @inject(ConnectionStatusService)
+    protected readonly connectionStatusService: ConnectionStatusService;
+
     protected track(widget: Widget): void {
         super.track(widget);
         if (widget instanceof OutputWidget) {
@@ -60,6 +68,10 @@ export class ApplicationShell extends TheiaApplicationShell {
     }
 
     async saveAll(): Promise<void> {
+        if (this.connectionStatusService.currentStatus === ConnectionStatus.OFFLINE) {
+            this.messageService.error('Could not save the sketch. Please copy your unsaved work into your favorite text editor, and restart the IDE.');
+            return; // Theia does not reject on failed save: https://github.com/eclipse-theia/theia/pull/8803
+        }
         await super.saveAll();
         const options = { execOnlyIfTemp: true, openAfterMove: true };
         await this.commandService.executeCommand(SaveAsSketch.Commands.SAVE_AS_SKETCH.id, options);

arduino-ide-extension/src/electron-browser/electron-window-service.ts

@@ -0,0 +1,28 @@
+import { inject, injectable } from 'inversify';
+import { remote } from 'electron';
+import { ConnectionStatus, ConnectionStatusService } from '@theia/core/lib/browser/connection-status-service';
+import { ElectronWindowService as TheiaElectronWindowService } from '@theia/core/lib/electron-browser/window/electron-window-service';
+
+@injectable()
+export class ElectronWindowService extends TheiaElectronWindowService {
+
+    @inject(ConnectionStatusService)
+    protected readonly connectionStatusService: ConnectionStatusService;
+
+    protected shouldUnload(): boolean {
+        const offline = this.connectionStatusService.currentStatus === ConnectionStatus.OFFLINE;
+        const detail = offline
+            ? 'Could not save the sketch. Please copy your unsaved work into your favorite text editor, and restart the IDE.'
+            : 'Any unsaved changes will not be saved.'
+        const electronWindow = remote.getCurrentWindow();
+        const response = remote.dialog.showMessageBoxSync(electronWindow, {
+            type: 'question',
+            buttons: ['Yes', 'No'],
+            title: 'Confirm',
+            message: 'Are you sure you want to close the sketch?',
+            detail
+        });
+        return response === 0; // 'Yes', close the window.
+    }
+
+}

arduino-ide-extension/src/electron-browser/theia/core/electron-menu-module.ts

@@ -1,9 +1,11 @@
 import { ContainerModule } from 'inversify';
-import { ElectronMenuContribution as TheiaElectronMenuContribution } from '@theia/core/lib/electron-browser/menu/electron-menu-contribution'
-import { ElectronMenuContribution } from './electron-menu-contribution';
-import { MainMenuManager } from '../../../common/main-menu-manager';
+import { WindowService } from '@theia/core/lib/browser/window/window-service';
 import { ElectronMainMenuFactory as TheiaElectronMainMenuFactory } from '@theia/core/lib/electron-browser/menu/electron-main-menu-factory';
+import { ElectronMenuContribution as TheiaElectronMenuContribution } from '@theia/core/lib/electron-browser/menu/electron-menu-contribution'
+import { MainMenuManager } from '../../../common/main-menu-manager';
+import { ElectronWindowService } from '../../electron-window-service';
 import { ElectronMainMenuFactory } from './electron-main-menu-factory';
+import { ElectronMenuContribution } from './electron-menu-contribution';
 
 export default new ContainerModule((bind, unbind, isBound, rebind) => {
     bind(ElectronMenuContribution).toSelf().inSingletonScope();
@@ -11,4 +13,6 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
     rebind(TheiaElectronMenuContribution).to(ElectronMenuContribution);
     bind(ElectronMainMenuFactory).toSelf().inRequestScope();
     rebind(TheiaElectronMainMenuFactory).toService(ElectronMainMenuFactory);
+    bind(ElectronWindowService).toSelf().inSingletonScope()
+    rebind(WindowService).toService(ElectronWindowService);
 });

arduino-ide-extension/src/electron-main/theia/electron-main-application.ts

@@ -57,6 +57,7 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
                 args,
                 await this.getForkOptions(),
             );
+            console.log(`Starting backend process. PID: ${backendProcess.pid}`);
             return new Promise((resolve, reject) => {
                 // The backend server main file is also supposed to send the resolved http(s) server port via IPC.
                 backendProcess.on('message', (address: AddressInfo) => {