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#!/usr/bin/env python3
__doc__ = '''Check that the ufos in a designspace file are interpolatable'''
__url__ = 'https://github.com/silnrsi/pysilfont'
__copyright__ = 'Copyright (c) 2021 SIL International (https://www.sil.org)'
__license__ = 'Released under the MIT License (https://opensource.org/licenses/MIT)'
__author__ = 'David Raymond'
from silfont.core import execute
from fontParts.world import OpenFont
import fontTools.designspaceLib as DSD
argspec = [
('designspace', {'help': 'Design space file'}, {'type': 'filename'}),
('-l','--log', {'help': 'Log file'}, {'type': 'outfile', 'def': '_checkinterp.log'}),
]
def doit(args) :
logger = args.logger
ds = DSD.DesignSpaceDocument()
ds.read(args.designspace)
if len(ds.sources) == 1: logger.log("The design space file has only one source UFO", "S")
# Find all the UFOs from the DS Sources. Where there are more than 2, the primary one will be considered to be
# the one where info copy="1" is set (as per psfsyncmasters). If not set for any, use the first ufo.
pufo = None
otherfonts = {}
for source in ds.sources:
ufo = source.path
try:
font = OpenFont(ufo)
except Exception as e:
logger.log("Unable to open " + ufo, "S")
if source.copyInfo:
if pufo: logger.log('Multiple fonts with <info copy="1" />', "S")
pufo = ufo
pfont = font
else:
otherfonts[ufo] = font
if pufo is None: # If we can't identify the primary font by conyInfo, just use the first one
pufo = ds.sources[0].path
pfont = otherfonts[pufo]
del otherfonts[pufo]
pinventory = set(glyph.name for glyph in pfont)
for oufo in otherfonts:
logger.log(f'Comparing {pufo} with {oufo}', 'P')
ofont = otherfonts[oufo]
oinventory = set(glyph.name for glyph in ofont)
if pinventory != oinventory:
logger.log("The glyph inventories in the two UFOs differ", "E")
for glyphn in sorted(pinventory - oinventory):
logger.log(f'{glyphn} is only in {pufo}', "W")
for glyphn in sorted(oinventory - pinventory):
logger.log(f'{glyphn} is only in {oufo}', "W")
else:
logger.log("The UFOs have the same glyph inventories", "P")
# Are glyphs compatible for interpolation
incompatibles = {}
for glyphn in pinventory & oinventory:
compatible, report = pfont[glyphn].isCompatible(ofont[glyphn])
if not compatible: incompatibles[glyphn] = report
if incompatibles:
logger.log(f'{len(incompatibles)} glyphs are not interpolatable', 'E')
for glyphn in sorted(incompatibles):
logger.log(f'{glyphn} is not interpolatable', 'W')
logger.log(incompatibles[glyphn], "I")
if logger.scrlevel == "W": logger.log("To see detailed reports run with scrlevel and/or loglevel set to I")
else:
logger.log("All the glyphs are interpolatable", "P")
def cmd() : execute(None,doit, argspec)
if __name__ == "__main__": cmd()
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