I tried to use zprint in Calva Formatter but had to give up on trying to behave like I needed it to behave. I mentioned it in this thread, which asked for ways to make zprint to not alter newlines. It could be that zprint can meet my format-as-you-type requirements, and I just haven’t found out how. I also mentioned in earlier in this thread that I think a formatter that should support the editor use cases need to be able to consider the cursor position and the selection before and after reformatting the text. For perfomance reasons I would also wish for a way to ask zprint to only format a given range of the code as well as a ”minimal” range from the cursor.
I mentioned a few other things that the editor use cases need, early in the thread. If zprint can be made to support being used by the editors while code is being edited, I would say it is definitely a way to implement this Commons formatter, that should be considered.