@graphql-tools/graphql/esm/language/location.js

Fork of GraphQL.js

import { invariant } from '../jsutils/invariant.js';
const LineRegExp = /\r\n|[\n\r]/g;
/**
 * Takes a Source and a UTF-8 character offset, and returns the corresponding
 * line and column as a SourceLocation.
 */
export function getLocation(source, position) {
    let lastLineStart = 0;
    let line = 1;
    for (const match of source.body.matchAll(LineRegExp)) {
        invariant(typeof match.index === 'number');
        if (match.index >= position) {
            break;
        }
        lastLineStart = match.index + match[0].length;
        line += 1;
    }
    return { line, column: position + 1 - lastLineStart };
}