Function generateSourceMap

packages/utils/src/source-map.ts:28–80

(locationData: FullLocationData)

 *
 */
export function generateSourceMap(locationData: FullLocationData): string {
  let prevStartLine = 0;
  let prevStartColumn = 0;
  let prevEndLine = 0;
  let prevEndColumn = 0;
  let prevHint = PositionHint.START;

  return locationData.map(({ location, positionHint }: SingleLocationData) => {
    const prevStartLineString = prevStartLine === location.start.line ? '' : String(location.start.line);
    prevStartLine = location.start.line;

    const prevStartColumnString = prevStartColumn === location.start.column ? '' : String(location.start.column);
    prevStartColumn = location.start.column;

    const prevEndLineString = prevEndLine === location.end.line ? '' : String(location.end.line);
    prevEndLine = location.end.line;

    const prevEndColumnString = prevEndColumn === location.end.column ? '' : String(location.end.column);
    prevEndColumn = location.end.column;

    const hint = positionHint ?? PositionHint.START;
    const prevHintString = prevHint === hint ? '' : String(hint);
    prevHint = hint;

    let result = '';
    if (prevStartLineString) {
      result += prevStartLineString;
    }

    result += ':';
    if (prevStartColumnString) {
      result += prevStartColumnString;
    }

    result += ':';
    if (prevEndLineString) {
      result += prevEndLineString;
    }

    result += ':';
    if (prevEndColumnString) {
      result += prevEndColumnString;
    }

    result += ':';
    if (prevHintString) {
      result += prevHintString;
    }

    result = result.replace(/:*$/, '');
    return result;
  }).join(';');
}

export const sourceMapToLocationData = (sourceMap: string): FullLocationData => {
  let prevStartLine = 0;