getLineAtOffset method

  1. @override
TextSelection getLineAtOffset(
  1. TextPosition position
)
override

Return a TextSelection containing the line of the given TextPosition.

Implementation

@override
TextSelection getLineAtOffset(TextPosition position) {
  final child = childAtPosition(position);
  final nodeOffset = child.container.offset;
  final localPosition = TextPosition(
      offset: position.offset - nodeOffset, affinity: position.affinity);
  final localLineRange = child.getLineBoundary(localPosition);
  final line = TextRange(
    start: localLineRange.start + nodeOffset,
    end: localLineRange.end + nodeOffset,
  );
  return TextSelection(baseOffset: line.start, extentOffset: line.end);
}