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Maven plugin for generating graphql clients

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/* @flow */
/**
 *  Copyright (c) 2015, Facebook, Inc.
 *  All rights reserved.
 *
 *  This source code is licensed under the BSD-style license found in the
 *  LICENSE file in the root directory of this source tree. An additional grant
 *  of patent rights can be found in the PATENTS file in the same directory.
 */

import type { Source } from './source';

/**
 * Represents a location in a Source.
 */
export type SourceLocation = {
  line: number;
  column: number;
};

/**
 * Takes a Source and a UTF-8 character offset, and returns the corresponding
 * line and column as a SourceLocation.
 */
export function getLocation(source: Source, position: number): SourceLocation {
  const lineRegexp = /\r\n|[\n\r]/g;
  let line = 1;
  let column = position + 1;
  let match;
  while ((match = lineRegexp.exec(source.body)) && match.index < position) {
    line += 1;
    column = position + 1 - (match.index + match[0].length);
  }
  return { line, column };
}