How can I extract the highlight annotations precisely?

[JevanWu]

Using the intersection of the annotation rectangle (or even squads) and TextItem, you can find the overlapped TextItem.

However, in case the TextItem is not fully covered by the annotation, how can I precisely extract the texts covered by the highlight? Roughly estimated char width would lead to offset.

I tried multiple ways, but it didn't work. Please help. Thanks 🙏