All files / utilities/vscode edit.ts

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import * as vscode from 'vscode';
 
/**
 * Get the delta of lines caused by a workspace edit.
 * @param edit A workspace edit.
 * @returns The delta of lines caused by the edit.
 */
export function calculateLineOffset(edit: vscode.WorkspaceEdit): number {
	let lineOffset = 0;
 
	for (const [uri, edits] of edit.entries()) {
		for (const e of edits) {
			const startLine = e.range.start.line;
			const endLine = e.range.end.line;
 
			if (e.newText === '') {
				// Deletion
				lineOffset -= (endLine - startLine);
			} else {
				// Insertion or Replacement
				const newLines = e.newText.split('\n').length - 1;
				lineOffset += newLines - (endLine - startLine);
			}
		}
	}
 
	return lineOffset;
}