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AntlrTreeDataProvider.ts
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AntlrTreeDataProvider.ts
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/*
* Copyright (c) Mike Lischke. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*/
import { TreeDataProvider, TreeItem, EventEmitter, TextDocument, ProviderResult, Event } from "vscode";
import { AntlrFacade } from "../backend/facade.js";
export class AntlrTreeDataProvider<T extends TreeItem> implements TreeDataProvider<T> {
protected currentFile: string | undefined;
private changeEvent = new EventEmitter<void>();
public constructor(protected backend: AntlrFacade) { }
public get onDidChangeTreeData(): Event<void> {
return this.changeEvent.event;
}
public refresh(document: TextDocument | undefined): void {
if (document && document.languageId === "antlr" && document.uri.scheme === "file") {
this.currentFile = document.fileName;
} else {
this.currentFile = undefined;
}
this.changeEvent.fire();
}
public getTreeItem(element: T): TreeItem {
return element;
}
public getChildren(_element?: T): ProviderResult<T[]> {
return undefined;
}
}