selectPositionAt method

@override void selectPositionAt({ required Offset from, Offset? to, required SelectionChangedCause cause, })

Select text between the global positions from and to.

Implementation

@override
void selectPositionAt({
  required Offset from,
  Offset? to,
  required SelectionChangedCause cause,
}) {
  // _layoutText(minWidth: constraints.minWidth, maxWidth: constraints.maxWidth);
  if (onSelectionChanged == null) {
    return;
  }
  final fromPosition = getPositionForOffset(from);
  final toPosition = to == null ? null : getPositionForOffset(to);

  var baseOffset = fromPosition.offset;
  var extentOffset = fromPosition.offset;
  if (toPosition != null) {
    baseOffset = math.min(fromPosition.offset, toPosition.offset);
    extentOffset = math.max(fromPosition.offset, toPosition.offset);
  }

  final newSelection = TextSelection(
    baseOffset: baseOffset,
    extentOffset: extentOffset,
    affinity: fromPosition.affinity,
  );
  // Call [onSelectionChanged] only when the selection actually changed.
  _handleSelectionChange(newSelection, cause);
}