Center an anchor element with the baseline of text

Hi everyone,

I'm trying to develop an Adobe script that places a PDF inside a text element. The only problem I have is that the PDF placed is not "placed" vertically centered with the baseline of text.

E.g.: result liked: Lorem ipsum is <PLACED PDF>

                                                                      <PLACED PDF>

what Indesign does: Lorem ipsum is 

I'm using the option `FitOptions.FRAME_TO_CONTENT`. How can I center those elements knowing the baseline of the text?

If I have to include more PDFs (different sizes) into the text, and my text is composed by multiple lines, how could I manage the different values of baseline?

Best,

Lorenzo