PROEDITOR-50: Customized the editor for built-ins

- From now on, sources from the `dataDir` opened in a read-only editor.
 - Disabled the tab-bar decoration for built-ins.
 - No problem markers for the built-ins.

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

arduino-ide-extension/src/browser/arduino-frontend-module.ts

@@ -63,6 +63,12 @@ import { MonitorWidget } from './monitor/monitor-widget';
 import { MonitorViewContribution } from './monitor/monitor-view-contribution';
 import { MonitorConnection } from './monitor/monitor-connection';
 import { MonitorModel } from './monitor/monitor-model';
+import { MonacoEditorProvider } from '@theia/monaco/lib/browser/monaco-editor-provider';
+import { ArduinoMonacoEditorProvider } from './editor/arduino-monaco-editor-provider';
+import { TabBarDecoratorService } from '@theia/core/lib/browser/shell/tab-bar-decorator';
+import { ArduinoTabBarDecoratorService } from './shell/arduino-tab-bar-decorator';
+import { ProblemManager } from '@theia/markers/lib/browser';
+import { ArduinoProblemManager } from './markers/arduino-problem-manager';
 const ElementQueries = require('css-element-queries/src/ElementQueries');
 
 export default new ContainerModule((bind: interfaces.Bind, unbind: interfaces.Unbind, isBound: interfaces.IsBound, rebind: interfaces.Rebind) => {
@@ -213,4 +219,19 @@ export default new ContainerModule((bind: interfaces.Bind, unbind: interfaces.Un
     }
     unbind(FrontendApplication);
     bind(FrontendApplication).to(CustomFrontendApplication).inSingletonScope();
+
+    // monaco customizations
+    unbind(MonacoEditorProvider);
+    bind(ArduinoMonacoEditorProvider).toSelf().inSingletonScope();
+    bind(MonacoEditorProvider).toService(ArduinoMonacoEditorProvider);
+
+    // decorator customizations
+    unbind(TabBarDecoratorService);
+    bind(ArduinoTabBarDecoratorService).toSelf().inSingletonScope();
+    bind(TabBarDecoratorService).toService(ArduinoTabBarDecoratorService);
+
+    // problem markers
+    unbind(ProblemManager);
+    bind(ArduinoProblemManager).toSelf().inSingletonScope();
+    bind(ProblemManager).toService(ArduinoProblemManager);
 });

arduino-ide-extension/src/browser/editor/arduino-monaco-editor-provider.ts

@@ -0,0 +1,34 @@
+import { inject, injectable } from 'inversify';
+import URI from '@theia/core/lib/common/uri';
+import { DisposableCollection } from '@theia/core/lib/common/disposable';
+import { MonacoEditor } from '@theia/monaco/lib/browser/monaco-editor';
+import { MonacoEditorModel } from '@theia/monaco/lib/browser/monaco-editor-model';
+import { MonacoEditorProvider } from '@theia/monaco/lib/browser/monaco-editor-provider';
+import { ConfigService } from '../../common/protocol/config-service';
+
+@injectable()
+export class ArduinoMonacoEditorProvider extends MonacoEditorProvider {
+
+    @inject(ConfigService)
+    protected readonly configService: ConfigService;
+    protected dataDirUri: string | undefined;
+
+    protected async getModel(uri: URI, toDispose: DisposableCollection): Promise<MonacoEditorModel> {
+        // `createMonacoEditorOptions` is not `async` so we ask the `dataDirUri` here.
+        // https://github.com/eclipse-theia/theia/issues/6234
+        const { dataDirUri } = await this.configService.getConfiguration()
+        this.dataDirUri = dataDirUri;
+        return super.getModel(uri, toDispose);
+    }
+
+    protected createMonacoEditorOptions(model: MonacoEditorModel): MonacoEditor.IOptions {
+        const options = this.createOptions(this.preferencePrefixes, model.uri, model.languageId);
+        options.model = model.textEditorModel;
+        options.readOnly = model.readOnly;
+        if (this.dataDirUri) {
+            options.readOnly = new URI(this.dataDirUri).isEqualOrParent(new URI(model.uri));
+        }
+        return options;
+    }
+
+}

arduino-ide-extension/src/browser/markers/arduino-problem-manager.ts

@@ -0,0 +1,28 @@
+import { inject, injectable, postConstruct } from 'inversify';
+import { Diagnostic } from 'vscode-languageserver-types';
+import URI from '@theia/core/lib/common/uri';
+import { Marker } from '@theia/markers/lib/common/marker';
+import { ProblemManager } from '@theia/markers/lib/browser/problem/problem-manager';
+import { ConfigService } from '../../common/protocol/config-service';
+
+@injectable()
+export class ArduinoProblemManager extends ProblemManager {
+
+    @inject(ConfigService)
+    protected readonly configService: ConfigService;
+    protected dataDirUri: URI | undefined;
+
+    @postConstruct()
+    protected init(): void {
+        super.init();
+        this.configService.getConfiguration().then(({ dataDirUri }) => this.dataDirUri = new URI(dataDirUri));
+    }
+
+    setMarkers(uri: URI, owner: string, data: Diagnostic[]): Marker<Diagnostic>[] {
+        if (this.dataDirUri && this.dataDirUri.isEqualOrParent(uri)) {
+            return [];
+        }
+        return super.setMarkers(uri, owner, data);
+    }
+
+}

arduino-ide-extension/src/browser/shell/arduino-tab-bar-decorator.ts

@@ -0,0 +1,32 @@
+import { inject, injectable, postConstruct } from 'inversify';
+import URI from '@theia/core/lib/common/uri';
+import { Title, Widget } from '@phosphor/widgets';
+import { WidgetDecoration } from '@theia/core/lib/browser/widget-decoration';
+import { TabBarDecoratorService } from '@theia/core/lib/browser/shell/tab-bar-decorator';
+import { ConfigService } from '../../common/protocol/config-service';
+import { EditorWidget } from '@theia/editor/lib/browser';
+
+@injectable()
+export class ArduinoTabBarDecoratorService extends TabBarDecoratorService {
+
+    @inject(ConfigService)
+    protected readonly configService: ConfigService;
+    protected dataDirUri: URI | undefined;
+
+    @postConstruct()
+    protected init(): void {
+        super.init();
+        this.configService.getConfiguration().then(({ dataDirUri }) => this.dataDirUri = new URI(dataDirUri));
+    }
+
+    getDecorations(title: Title<Widget>): WidgetDecoration.Data[] {
+        if (title.owner instanceof EditorWidget) {
+            const editor = title.owner.editor;
+            if (this.dataDirUri && this.dataDirUri.isEqualOrParent(editor.uri)) {
+                return [];
+            }
+        }
+        return super.getDecorations(title);
+    }
+
+}