Replaced the splash screen with a preload.

Added a bare minimum example.

Closes #324
Closes #327
Closes #717
Closes #851

Signed-off-by: Akos Kitta <a.kitta@arduino.cc>

Author: Akos Kitta

.vscode/launch.json

@@ -20,7 +20,6 @@
         "--no-app-auto-install",
         "--plugins=local-dir:../plugins",
         "--hosted-plugin-inspect=9339",
-        "--nosplash",
         "--content-trace",
         "--open-devtools"
       ],

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

@@ -6,10 +6,6 @@ import {
   ElectronMainWindowServiceExt,
   electronMainWindowServiceExtPath,
 } from '../../../electron-common/electron-main-window-service-ext';
-import {
-  SplashService,
-  splashServicePath,
-} from '../../../electron-common/splash-service';
 import { ElectronWindowService } from './electron-window-service';
 
 export default new ContainerModule((bind, unbind, isBound, rebind) => {
@@ -24,9 +20,4 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
       )
     )
     .inSingletonScope();
-  bind(SplashService)
-    .toDynamicValue(({ container }) =>
-      ElectronIpcConnectionProvider.createProxy(container, splashServicePath)
-    )
-    .inSingletonScope();
 });

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

@@ -1,17 +1,15 @@
-import {
-  inject,
-  injectable,
-  postConstruct,
-} from '@theia/core/shared/inversify';
 import * as remote from '@theia/core/electron-shared/@electron/remote';
-import { FrontendApplicationStateService } from '@theia/core/lib/browser/frontend-application-state';
 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';
-import { SplashService } from '../../../electron-common/splash-service';
 import { nls } from '@theia/core/lib/common';
+import { ElectronWindowService as TheiaElectronWindowService } from '@theia/core/lib/electron-browser/window/electron-window-service';
+import {
+  inject,
+  injectable,
+  postConstruct,
+} from '@theia/core/shared/inversify';
 import { WindowServiceExt } from '../../../browser/theia/core/window-service-ext';
 import { ElectronMainWindowServiceExt } from '../../../electron-common/electron-main-window-service-ext';
 
@@ -23,20 +21,14 @@ export class ElectronWindowService
   @inject(ConnectionStatusService)
   private readonly connectionStatusService: ConnectionStatusService;
 
-  @inject(SplashService)
-  private readonly splashService: SplashService;
-
-  @inject(FrontendApplicationStateService)
-  private readonly appStateService: FrontendApplicationStateService;
-
   @inject(ElectronMainWindowServiceExt)
   private readonly mainWindowServiceExt: ElectronMainWindowServiceExt;
 
   @postConstruct()
   protected override init(): void {
-    this.appStateService
-      .reachedAnyState('initialized_layout')
-      .then(() => this.splashService.requestClose());
+    // NOOP
+    // Does not listen on Theia's `window.zoomLevel` changes.
+    // TODO: IDE2 must switch to the Theia preferences and drop the custom one.
   }
 
   protected shouldUnload(): boolean {

arduino-ide-extension/src/electron-common/splash-service.ts

@@ -16,13 +16,8 @@ import {
   ElectronMainWindowServiceExt,
   electronMainWindowServiceExtPath,
 } from '../electron-common/electron-main-window-service-ext';
-import {
-  SplashService,
-  splashServicePath,
-} from '../electron-common/splash-service';
 import { ElectronMainWindowServiceExtImpl } from './electron-main-window-service-ext-impl';
 import { IDEUpdaterImpl } from './ide-updater/ide-updater-impl';
-import { SplashServiceImpl } from './splash/splash-service-impl';
 import { ElectronMainApplication } from './theia/electron-main-application';
 import { ElectronMainWindowServiceImpl } from './theia/electron-main-window-service';
 import { TheiaElectronWindow } from './theia/theia-electron-window';
@@ -34,17 +29,6 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
   bind(ElectronMainWindowServiceImpl).toSelf().inSingletonScope();
   rebind(ElectronMainWindowService).toService(ElectronMainWindowServiceImpl);
 
-  bind(SplashServiceImpl).toSelf().inSingletonScope();
-  bind(SplashService).toService(SplashServiceImpl);
-  bind(ElectronConnectionHandler)
-    .toDynamicValue(
-      (context) =>
-        new JsonRpcConnectionHandler(splashServicePath, () =>
-          context.container.get(SplashService)
-        )
-    )
-    .inSingletonScope();
-
   // IDE updater bindings
   bind(IDEUpdaterImpl).toSelf().inSingletonScope();
   bind(IDEUpdater).toService(IDEUpdaterImpl);