@theia/monaco/src/browser/monaco-utilities.ts

Theia - Monaco Extension

// *****************************************************************************
// Copyright (C) 2025 EclipseSource GmbH.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// http://www.eclipse.org/legal/epl-2.0.
//
// This Source Code may also be made available under the following Secondary
// Licenses when the conditions for such availability set forth in the Eclipse
// Public License v. 2.0 are satisfied: GNU General Public License, version 2
// with the GNU Classpath Exception which is available at
// https://www.gnu.org/software/classpath/license.html.
//
// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
// *****************************************************************************

import { MonacoEditorModel } from './monaco-editor-model';

export function insertFinalNewline(editorModel: MonacoEditorModel): void {
    const model = editorModel.textEditorModel;
    if (!model) {
        return;
    }

    const lines = model?.getLineCount();
    if (lines === 0) {
        return;
    }

    const lastLine = model?.getLineContent(lines);
    if (lastLine.trim() === '') {
        return;
    }

    const lastLineMaxColumn = model?.getLineMaxColumn(lines);
    const range = {
        startLineNumber: lines,
        startColumn: lastLineMaxColumn,
        endLineNumber: lines,
        endColumn: lastLineMaxColumn
    };
    model.applyEdits([{
        range,
        text: model?.getEOL()
    }]);
}