a plugin for sublime text to open and edit a binary font as a ttx file

open_font_with_ttx.py

import sublime
import sublime_plugin
import os
import tempfile
from fontTools import ttx

PREFIX = ".st3_ttx."
SFNT_SUFFIXES = ".otf .ttf .woff .woff2".split(" ")

class OpenTTX(sublime_plugin.EventListener):

    def on_load_async(self, view):
        fn = view.file_name()
        di,fi = os.path.split(fn)
        if os.path.splitext(fn)[-1] in SFNT_SUFFIXES:
            dumped = f"{di}/{PREFIX}{fi}.ttx"
            ttx.ttDump(fn,dumped,ttx.Options([], 1))
            view.window().focus_group(0)
            view.window().open_file(dumped)

    def on_pre_save_async(self, view):
        n = view.file_name()
        if PREFIX in n:
            path = n.replace(PREFIX, "").replace(".ttx", "")
            ttx.ttCompile(n, path, ttx.Options([], 1))

    def on_close(self, view):
        if PREFIX in view.file_name():
            os.remove(view.file_name())