def find_font_features(postscript_name: str) -> Tuple[str, ...]:
pat = fc_match_postscript_name(postscript_name)
if pat.get('postscript_name') != postscript_name or 'fontfeatures' not in pat:
return ()
features = []
for feat in pat['fontfeatures']:
try:
parsed = parse_font_feature(feat)
except ValueError:
log_error('Ignoring invalid font feature: {}'.format(feat))
else:
features.append(FontFeature(feat, parsed))
return tuple(features)
def font_features(val: str) -> Iterable[Tuple[str, Tuple[FontFeature, ...]]]:
if val == 'none':
return
parts = val.split()
if len(parts) < 2:
log_error(f"Ignoring invalid font_features {val}")
return
if parts[0]:
features = []
for feat in parts[1:]:
try:
parsed = defines.parse_font_feature(feat)
except ValueError:
log_error(f'Ignoring invalid font feature: {feat}')
else:
features.append(FontFeature(feat, parsed))
yield parts[0], tuple(features)
