He Nina

Space Center already doest that, in all three input boxes. You could use that for Word-O-Mat… so it has support for pasting glif xml

from lib.UI.spaceCenter.glyphSequenceEditText import GlyphSequenceEditText
from vanilla import *

class Test:
    
    def __init__(self):
        
        self.w = Window((200, 100))
        
        # the only tricky thing is that it is optimized for the lowerlevel defcon font object...
        self.w.input = GlyphSequenceEditText((10, 10, -10, 22), CurrentFont().naked(), callback=self.inputChangedCallback)
        self.w.open()

    def inputChangedCallback(self, sender):
        print sender.get()

Test()

FYI:

RoboFont writes different representations to the pasteboard, any thing that is responding to a paste action can read their preferred representation.

it is possible to add you’re own representations if you subscribe to the paste notification, just a add or rewrite whatever you like :)

see https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/PasteboardGuide106/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008100-SW1