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#!/usr/bin/env python3
# ==========================================================================
# fontname.py
# Copyright 2019 Christopher Simpkins
# MIT License
#
# Dependencies:
# 1) Python 3.6+ interpreter
# 2) fonttools Python library (https://github.com/fonttools/fonttools)
# - install with `pip3 install fonttools`
#
# Usage:
# python3 fontname.py [FONT FAMILY NAME] [FONT PATH 1] <FONT PATH ...>
#
# Notes:
# Use quotes around font family name arguments that include spaces
# ===========================================================================
import os
import sys
from fontTools import ttLib
def main(argv):
# command argument tests
print(" ")
if len(argv) < 2:
sys.stderr.write(
f"[fontname.py] ERROR: you did not include enough arguments to the script.{os.linesep}"
)
sys.stderr.write(
f"Usage: python3 fontname.py [FONT FAMILY NAME] [FONT PATH 1] <FONT PATH ...>{os.linesep}"
)
sys.exit(1)
# begin parsing command line arguments
try:
font_name = str(argv[0]) # the first argument is the new typeface name
except Exception as e:
sys.stderr.write(
f"[fontname.py] ERROR: Unable to convert argument to string. {e}{os.linesep}"
)
sys.exit(1)
# all remaining arguments on command line are file paths to fonts
font_path_list = argv[1:]
# iterate through all paths provided on command line and rename to `font_name` defined by user
for font_path in font_path_list:
# test for existence of font file on requested file path
if not file_exists(font_path):
sys.stderr.write(
f"[fontname.py] ERROR: the path '{font_path}' does not appear to be a valid file path.{os.linesep}"
)
sys.exit(1)
tt = ttLib.TTFont(font_path)
namerecord_list = tt["name"].names
style = ""
# determine font style for this file path from name record nameID 2
for record in namerecord_list:
if record.nameID == 2:
style = str(record)
break
# test that a style name was found in the OpenType tables of the font
if len(style) == 0:
sys.stderr.write(
f"[fontname.py] Unable to detect the font style from the OpenType name table in '{font_path}'. {os.linesep}"
)
sys.stderr.write("Unable to complete execution of the script.")
sys.exit(1)
else:
# used for the Postscript name in the name table (no spaces allowed)
postscript_font_name = font_name.replace(" ", "")
# font family name
nameID1_string = font_name
nameID16_string = font_name
# full font name
nameID4_string = f"{font_name} {style}"
# Postscript name
# - no spaces allowed in family name or the PostScript suffix. should be dash delimited
nameID6_string = f"{postscript_font_name}-{style.replace(' ', '')}"
# nameID6_string = postscript_font_name + "-" + style.replace(" ", "")
# modify the opentype table data in memory with updated values
for record in namerecord_list:
if record.nameID == 1:
record.string = nameID1_string
elif record.nameID == 4:
record.string = nameID4_string
elif record.nameID == 6:
record.string = nameID6_string
elif record.nameID == 16:
record.string = nameID16_string
# CFF table naming for CFF fonts (only)
if "CFF " in tt:
try:
cff = tt["CFF "]
cff.cff[0].FamilyName = nameID1_string
cff.cff[0].FullName = nameID4_string
cff.cff.fontNames = [nameID6_string]
except Exception as e:
sys.stderr.write(
f"[fontname.py] ERROR: unable to write new names to CFF table: {e}"
)
# write changes to the font file
try:
tt.save(font_path)
print(f"[OK] Updated '{font_path}' with the name '{nameID4_string}'")
except Exception as e:
sys.stderr.write(
f"[fontname.py] ERROR: unable to write new name to OpenType name table for '{font_path}'. {os.linesep}"
)
sys.stderr.write(f"{e}{os.linesep}")
sys.exit(1)
# Utilities
def file_exists(filepath):
"""Tests for existence of a file on the string filepath"""
return os.path.exists(filepath) and os.path.isfile(filepath)
if __name__ == "__main__":
main(sys.argv[1:])
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