TextSelection constructor

const TextSelection({@required int baseOffset, @required int extentOffset, TextAffinity affinity: TextAffinity.downstream, bool isDirectional: false })

Creates a text selection.

The baseOffset and extentOffset arguments must not be null.

Implementation 

const TextSelection({
  @required this.baseOffset,
  @required this.extentOffset,
  this.affinity = TextAffinity.downstream,
  this.isDirectional = false
}) : super(
       start: baseOffset < extentOffset ? baseOffset : extentOffset,
       end: baseOffset < extentOffset ? extentOffset : baseOffset
     );