def __init__(self,
featurefile,
font=None,
glyphNames=None,
includeDir=None):
self.ff = fontFeatures.FontFeatures()
self.markclasses = {}
self.currentFeature = None
self.currentRoutine = None
self.gensym = 1
self.glyphmap = ()
self.currentLanguage = None
if font and not glyphNames:
glyphNames = font.getGlyphOrder()
if isinstance(featurefile, str):
featurefile = io.StringIO(featurefile)
self.featurefile = featurefile
if glyphNames:
self.parser = Parser(self.featurefile,
glyphNames=glyphNames,
includeDir=includeDir)
else:
self.parser = Parser(self.featurefile, includeDir=includeDir)
self.parser.ast.ValueRecord = fontFeatures.ValueRecord
def parseLayoutFeatures(font):
"""Parse OpenType layout features in the UFO and return a
feaLib.ast.FeatureFile instance.
"""
featxt = font.features.text or ""
if not featxt:
return ast.FeatureFile()
buf = StringIO(featxt)
ufoPath = font.path
includeDir = None
if ufoPath is not None:
# The UFO v3 specification says "Any include() statements must be relative to
# the UFO path, not to the features.fea file itself". We set the `name`
# attribute on the buffer to the actual feature file path, which feaLib will
# pick up and use to attribute errors to the correct file, and explicitly set
# the include directory to the parent of the UFO.
ufoPath = os.path.normpath(ufoPath)
buf.name = os.path.join(ufoPath, "features.fea")
includeDir = os.path.dirname(ufoPath)
glyphNames = set(font.keys())
try:
parser = Parser(buf, glyphNames, includeDir=includeDir)
doc = parser.parse()
except IncludedFeaNotFound as e:
if ufoPath and os.path.exists(os.path.join(ufoPath, e.args[0])):
logger.warning("Please change the file name in the include(...); "
"statement to be relative to the UFO itself, "
"instead of relative to the 'features.fea' file "
"contained in it.")
raise
return doc
def parseLayoutFeatures(font):
""" Parse OpenType layout features in the UFO and return a
feaLib.ast.FeatureFile instance.
"""
featxt = tounicode(font.features.text or "", "utf-8")
if not featxt:
return ast.FeatureFile()
buf = UnicodeIO(featxt)
# the path is used by the lexer to resolve 'include' statements
# and print filename in error messages. For the UFO spec, this
# should be the path of the UFO, not the inner features.fea:
# https://github.com/unified-font-object/ufo-spec/issues/55
ufoPath = font.path
if ufoPath is not None:
buf.name = ufoPath
glyphNames = set(font.keys())
try:
parser = Parser(buf, glyphNames)
doc = parser.parse()
except IncludedFeaNotFound as e:
if ufoPath and os.path.exists(os.path.join(ufoPath, e.args[0])):
logger.warning("Please change the file name in the include(...); "
"statement to be relative to the UFO itself, "
"instead of relative to the 'features.fea' file "
"contained in it.")
raise
return doc
def parse(self, text):
if not self.tempdir:
self.tempdir = tempfile.mkdtemp()
self.num_tempfiles += 1
path = os.path.join(self.tempdir, "tmp%d.fea" % self.num_tempfiles)
with codecs.open(path, "wb", "utf-8") as outfile:
outfile.write(text)
return Parser(path).parse()
def parseFea(text):
from fontTools.feaLib.parser import Parser
if isinstance(text, ast.FeatureFile):
return text
f = StringIO(text)
fea = Parser(f).parse()
return fea
def check_fea2fea_file(self, name):
f = self.getpath("{}.fea".format(name))
p = Parser(f)
doc = p.parse()
tlines = self.normal_fea(doc.asFea().split("\n"))
with open(f, "r", encoding="utf-8") as ofile:
olines = self.normal_fea(ofile.readlines())
if olines != tlines:
for line in difflib.unified_diff(olines, tlines):
sys.stdout.write(line)
self.fail("Fea2Fea output is different from expected")
def parse(features):
names = set()
featurefile = UnicodeIO(tounicode(features))
fea = Parser(featurefile, []).parse()
for statement in fea.statements:
if getattr(statement, "name", None) in ("isol", "ccmp"):
for substatement in statement.statements:
if hasattr(substatement, "glyphs"):
# Single
names.update(substatement.glyphs[0].glyphSet())
elif hasattr(substatement, "glyph"):
# Multiple
names.add(substatement.glyph)
return names
def __init__(self, featurefile, font=None):
self.ff = fontFeatures.FontFeatures()
self.markclasses = {}
self.currentFeature = None
self.currentRoutine = None
self.gensym = 1
self.glyphmap = ()
self.currentLanguage = None
if font:
self.glyphmap = font.getReverseGlyphMap()
if isinstance(featurefile, str):
featurefile = io.StringIO(featurefile)
self.featurefile = featurefile
self.parser = Parser(self.featurefile, self.glyphmap)
self.parser.ast.ValueRecord = fontFeatures.ValueRecord
def build(self):
self.parseTree = Parser(self.featurefile_path).parse()
self.parseTree.build(self)
for tag in ('GPOS', 'GSUB'):
table = self.makeTable(tag)
if (table.ScriptList.ScriptCount > 0
or table.FeatureList.FeatureCount > 0
or table.LookupList.LookupCount > 0):
fontTable = self.font[tag] = getTableClass(tag)()
fontTable.table = table
elif tag in self.font:
del self.font[tag]
gdef = self.makeGDEF()
if gdef:
self.font["GDEF"] = gdef
elif "GDEF" in self.font:
del self.font["GDEF"]
def __init__(self, featurefile, font=None):
from fontTools.feaLib.parser import Parser
self.ff = fontFeatures.FontFeatures()
self.markclasses = {}
self.currentFeature = None
self.currentRoutine = None
self.gensym = 1
self.language_systems = []
glyphmap = ()
if font:
glyphmap = font.getReverseGlyphMap()
if isinstance(featurefile, str):
featurefile = io.StringIO(featurefile)
parsetree = Parser(featurefile, glyphmap).parse()
self.features_ = {}
parsetree.build(self)
def test_build_pre_parsed_ast_featurefile(self):
f = StringIO("feature liga {sub f i by f_i;} liga;")
tree = Parser(f).parse()
font = makeTTFont()
addOpenTypeFeatures(font, tree)
assert "GSUB" in font
def test_substitute_lookups(self):
doc = Parser(self.getpath("spec5fi1.fea")).parse()
[langsys, ligs, sub, feature] = doc.statements
self.assertEqual(feature.statements[0].lookups, [ligs, None, sub])
self.assertEqual(feature.statements[1].lookups, [ligs, None, sub])
reMarkClass = re.compile(r"markClass.*;")
markClassDefinitions = reMarkClass.findall(
markFeatures) # Save all the markClass definitions
# Read the input feature file
with open(in_path, "r") as input_fea:
# Replace $markClasses with the generated markClassDefinitions
if markClassDefinitions != []:
features = input_fea.read().replace(
"$markClasses", "\n".join(markClassDefinitions))
else:
features = input_fea.read().replace("$markClasses", "")
if stylename:
# Replace the matra I style-based include path for each style
print("Replacing $stylename with '%s' if found in feature file" %
stylename)
features = features.replace("$stylename", stylename)
# Write to a temporary file, which we can parse and expand all includes
with open("production/features/tmp.fea", "w") as tmp:
tmp.write(features)
parser = Parser("production/features/tmp.fea")
parsed = parser.parse()
os.remove("production/features/tmp.fea")
# Write the parsed and substituted features to the UFO features
with open(out_path + "/features.fea", "w") as fea:
fea.write(str(parsed))
def build(self):
parsetree = Parser(self.featurefile_path).parse()
parsetree.build(self)
for tag in ('GPOS', 'GSUB'):
fontTable = self.font[tag] = getTableClass(tag)()
fontTable.table = self.makeTable(tag)