getPositionForOffset method
Returns the position within the text for the given pixel offset.
Implementation
TextPosition getPositionForOffset(Offset offset) {
assert(_debugAssertTextLayoutIsValid);
assert(!_debugNeedsRelayout);
final _TextPainterLayoutCacheWithOffset cachedLayout = _layoutCache!;
return cachedLayout.paragraph
.getPositionForOffset(offset - cachedLayout.paintOffset);
}