| 'use strict'; |
| |
| Object.defineProperty(exports, '__esModule', { |
| value: true, |
| }); |
| exports.getLocation = getLocation; |
| |
| var _invariant = require('../jsutils/invariant.js'); |
| |
| /** @category Source */ |
| const LineRegExp = /\r\n|[\n\r]/g; |
| /** Represents a location in a Source. */ |
| |
| /** |
| * Takes a Source and a UTF-8 character offset, and returns the corresponding |
| * line and column as a SourceLocation. |
| * @param source - The source document that contains the position. |
| * @param position - The UTF-8 character offset in the source body. |
| * @returns The 1-indexed line and column for the given source position. |
| * @example |
| * ```ts |
| * import { Source, getLocation } from 'graphql/language'; |
| * |
| * const source = new Source('type Query { hello: String }'); |
| * const location = getLocation(source, 13); |
| * |
| * location; // => { line: 1, column: 14 } |
| * ``` |
| */ |
| function getLocation(source, position) { |
| let lastLineStart = 0; |
| let line = 1; |
| |
| for (const match of source.body.matchAll(LineRegExp)) { |
| typeof match.index === 'number' || (0, _invariant.invariant)(false); |
| |
| if (match.index >= position) { |
| break; |
| } |
| |
| lastLineStart = match.index + match[0].length; |
| line += 1; |
| } |
| |
| return { |
| line, |
| column: position + 1 - lastLineStart, |
| }; |
| } |