function generateSourceMappings()

in packages/flow-remove-types/index.js [612:647]

• 32 lines of code
• 8 McCabe index (conditional complexity)

function generateSourceMappings(removedNodes) {
  var mappings = '';
  if (!removedNodes || removedNodes.length === '') {
    return mappings;
  }

  var end = {line: 1, column: 0};

  for (var i = 0; i < removedNodes.length; i++) {
    var start = removedNodes[i].loc.start;
    var lineDiff = start.line - end.line;
    var columnDiff = start.column - end.column;
    if (lineDiff) {
      for (var l = 0; l !== lineDiff; l++) {
        mappings += ';';
      }
      mappings += vlq.encode([start.column, 0, lineDiff, columnDiff]);
    } else if (columnDiff) {
      if (i) {
        mappings += ',';
      }
      mappings += vlq.encode([columnDiff, 0, lineDiff, columnDiff]);
    }

    end = removedNodes[i].loc.end;
    mappings += ',';
    mappings += vlq.encode([
      0,
      0,
      end.line - start.line,
      end.column - start.column,
    ]);
  }

  return mappings;
}