GetCharacterIndexFromPoint method for TextBox

[rampaa]

Is your feature request related to a problem? Please describe.
I want to get the index of the character from the TextBox that is closest to cursor position but I'm not sure if there's a straightforward way of achieving this.

Describe the solution you'd like
WPF TextBox has a method called GetCharacterIndexFromPoint, a method equivalent to that would let me achieve my goal.

[Gillibald]

That should not be too complicated to add. The hard work is already done by the underlying TextLayout.

https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Base/Media/TextFormatting/TextLayout.cs#L283 for example

TextLayout is exposed to the TextBox via the _textPresenter

Contributions are welcome 🙏