Fix toggle line comment for tree-sitter (#244115)

Author: alexr00

src/vs/workbench/services/treeSitter/browser/treeSitterTokenizationFeature.ts

@@ -128,7 +128,7 @@ export class TreeSitterTokenizationSupport extends Disposable implements ITreeSi
 	private _colorThemeData!: ColorThemeData;
 	private _languageAddedListener: IDisposable | undefined;
 	private _codeEditors: TreeSitterCodeEditors;
-	private _encodedLanguageId: LanguageId;
+	private _encodedLanguage: LanguageId | undefined;
 
 	constructor(
 		private readonly _queries: TreeSitterQueries,
@@ -142,7 +142,6 @@ export class TreeSitterTokenizationSupport extends Disposable implements ITreeSi
 		@IInstantiationService private readonly _instantiationService: IInstantiationService,
 	) {
 		super();
-		this._encodedLanguageId = this._languageIdCodec.encodeLanguageId(this._languageId);
 		this._codeEditors = this._instantiationService.createInstance(TreeSitterCodeEditors, this._languageId);
 		this._register(this._codeEditors.onDidChangeViewport(e => {
 			this._parseAndTokenizeViewPort(e.model, e.ranges);
@@ -180,6 +179,13 @@ export class TreeSitterTokenizationSupport extends Disposable implements ITreeSi
 		}));
 	}
 
+	private get _encodedLanguageId(): LanguageId {
+		if (!this._encodedLanguage) {
+			this._encodedLanguage = this._languageIdCodec.encodeLanguageId(this._languageId);
+		}
+		return this._encodedLanguage;
+	}
+
 	private _setInitialTokens(textModel: ITextModel) {
 		const tokens: TokenUpdate[] = this._createEmptyTokens(textModel);
 		this._tokenizationStoreService.setTokens(textModel, tokens, TokenQuality.None);