extendSelection method
Extends current selection to the position closest to specified offset.
Implementation
void extendSelection(Offset to, {required SelectionChangedCause cause}) {
/// The below logic does not exactly match the native version because
/// we do not allow swapping of base and extent positions.
assert(_extendSelectionOrigin != null);
final position = getPositionForOffset(to);
if (position.offset < _extendSelectionOrigin!.baseOffset) {
_handleSelectionChange(
TextSelection(
baseOffset: position.offset,
extentOffset: _extendSelectionOrigin!.extentOffset,
affinity: selection.affinity,
),
cause,
);
} else if (position.offset > _extendSelectionOrigin!.extentOffset) {
_handleSelectionChange(
TextSelection(
baseOffset: _extendSelectionOrigin!.baseOffset,
extentOffset: position.offset,
affinity: selection.affinity,
),
cause,
);
}
}