monaco-editor
Version:
A browser based code editor
40 lines (37 loc) • 1.64 kB
JavaScript
import { lastNonWhitespaceIndex } from '../../../../base/common/strings.js';
import { EditOperation } from '../../../common/core/editOperation.js';
import { Position } from '../../../common/core/position.js';
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
class InsertFinalNewLineCommand {
constructor(selection) {
this._selection = selection;
this._selectionId = null;
}
getEditOperations(model, builder) {
const op = insertFinalNewLine(model);
if (op) {
builder.addEditOperation(op.range, op.text);
}
this._selectionId = builder.trackSelection(this._selection);
}
computeCursorState(model, helper) {
return helper.getTrackedSelection(this._selectionId);
}
}
/**
* Generate edit operations for inserting a final new line if needed.
* Returns undefined if no edit is needed.
*/
function insertFinalNewLine(model) {
const lineCount = model.getLineCount();
const lastLine = model.getLineContent(lineCount);
const lastLineIsEmptyOrWhitespace = lastNonWhitespaceIndex(lastLine) === -1;
if (!lineCount || lastLineIsEmptyOrWhitespace) {
return;
}
return EditOperation.insert(new Position(lineCount, model.getLineMaxColumn(lineCount)), model.getEOL());
}
export { InsertFinalNewLineCommand, insertFinalNewLine };