def asFeaAST(self):
b = feaast.Block()
if self.is_cursive:
allglyphs = set(self.bases.keys()) | set(self.marks.keys())
for g in allglyphs:
b.statements.append(
feaast.CursivePosStatement(
glyphref([g]),
g in self.bases and feaast.Anchor(*self.bases[g]),
g in self.marks and feaast.Anchor(*self.marks[g]),
))
else:
if not hasattr(self, "baseslist"):
sortByAnchor(self) # e.g. when testing
for base in self.baseslist:
statementtype = feaast.MarkBasePosStatement
if self.font:
if categorize_glyph(self.font, base[0][0])[0] == "mark":
statementtype = feaast.MarkMarkPosStatement
b.statements.append(
statementtype(
glyphref(base[0]),
[[
feaast.Anchor(*base[1]),
feaast.MarkClass(self.base_name)
]],
))
return b
def parse_position_cursive_(self, enumerated, vertical):
location = self.cur_token_location_
self.expect_keyword_("cursive")
if enumerated:
raise FeatureLibError(
'"enumerate" is not allowed with '
'cursive attachment positioning', location)
glyphclass = self.parse_glyphclass_(accept_glyphname=True).glyphSet()
entryAnchor = self.parse_anchor_()
exitAnchor = self.parse_anchor_()
self.expect_symbol_(";")
return ast.CursivePosStatement(location, glyphclass, entryAnchor,
exitAnchor)
def asFeaAST(self):
b = feaast.Block()
# if any(
# isinstance(x[0], VariableScalar) or isinstance(x[1], VariableScalar)
# for x in list(self.bases.values()) + list(self.marks.values())
# ):
# raise ValueError("Can't directly express a variable anchor in FEA")
if self.is_cursive:
allglyphs = set(self.bases.keys()) | set(self.marks.keys())
for g in allglyphs:
b.statements.append(
feaast.CursivePosStatement(
_glyphref([g]),
g in self.bases and feaast.Anchor(*self.bases[g]),
g in self.marks and feaast.Anchor(*self.marks[g]),
))
else:
if not hasattr(self, "baseslist"):
sortByAnchor(self) # e.g. when testing
for base in self.baseslist:
statementtype = feaast.MarkBasePosStatement
if self.font:
if categorize_glyph(self.font, base[0][0])[0] == "mark":
statementtype = feaast.MarkMarkPosStatement
if self.force_markmark:
statementtype = feaast.MarkMarkPosStatement
b.statements.append(
statementtype(
_glyphref(base[0]),
[[
feaast.Anchor(*base[1]),
feaast.MarkClass(self.base_name)
]],
))
return b
def _gposLookup(self, lookup, fealookup):
statements = fealookup.statements
pos = lookup.pos
if isinstance(pos, VAst.PositionAdjustPairDefinition):
for (idx1, idx2), (pos1, pos2) in pos.adjust_pair.items():
coverage_1 = pos.coverages_1[idx1 - 1]
coverage_2 = pos.coverages_2[idx2 - 1]
# If not both are groups, use “enum pos” otherwise makeotf will
# fail.
enumerated = False
for item in coverage_1 + coverage_2:
if not isinstance(item, VAst.GroupName):
enumerated = True
glyphs1 = self._coverage(coverage_1)
glyphs2 = self._coverage(coverage_2)
record1 = self._adjustment(pos1)
record2 = self._adjustment(pos2)
assert len(glyphs1) == 1
assert len(glyphs2) == 1
statements.append(
ast.PairPosStatement(glyphs1[0],
record1,
glyphs2[0],
record2,
enumerated=enumerated))
elif isinstance(pos, VAst.PositionAdjustSingleDefinition):
for a, b in pos.adjust_single:
glyphs = self._coverage(a)
record = self._adjustment(b)
assert len(glyphs) == 1
statements.append(
ast.SinglePosStatement([(glyphs[0], record)], [], [],
False))
elif isinstance(pos, VAst.PositionAttachDefinition):
anchors = {}
for marks, classname in pos.coverage_to:
for mark in marks:
# Set actually used mark classes. Basically a hack to get
# around the feature file syntax limitation of making mark
# classes global and not allowing mark positioning to
# specify mark coverage.
for name in mark.glyphSet():
key = (name, "MARK_" + classname)
self._markclasses[key].used = True
markclass = ast.MarkClass(self._className(classname))
for base in pos.coverage:
for name in base.glyphSet():
if name not in anchors:
anchors[name] = []
if classname not in anchors[name]:
anchors[name].append(classname)
for name in anchors:
components = 1
if name in self._ligatures:
components = self._ligatures[name]
marks = []
for mark in anchors[name]:
markclass = ast.MarkClass(self._className(mark))
for component in range(1, components + 1):
if len(marks) < component:
marks.append([])
anchor = None
if component in self._anchors[name][mark]:
anchor = self._anchors[name][mark][component]
marks[component - 1].append((anchor, markclass))
base = self._glyphName(name)
if name in self._marks:
mark = ast.MarkMarkPosStatement(base, marks[0])
elif name in self._ligatures:
mark = ast.MarkLigPosStatement(base, marks)
else:
mark = ast.MarkBasePosStatement(base, marks[0])
statements.append(mark)
elif isinstance(pos, VAst.PositionAttachCursiveDefinition):
# Collect enter and exit glyphs
enter_coverage = []
for coverage in pos.coverages_enter:
for base in coverage:
for name in base.glyphSet():
enter_coverage.append(name)
exit_coverage = []
for coverage in pos.coverages_exit:
for base in coverage:
for name in base.glyphSet():
exit_coverage.append(name)
# Write enter anchors, also check if the glyph has exit anchor and
# write it, too.
for name in enter_coverage:
glyph = self._glyphName(name)
entry = self._anchors[name]["entry"][1]
exit = None
if name in exit_coverage:
exit = self._anchors[name]["exit"][1]
exit_coverage.pop(exit_coverage.index(name))
statements.append(ast.CursivePosStatement(glyph, entry, exit))
# Write any remaining exit anchors.
for name in exit_coverage:
glyph = self._glyphName(name)
exit = self._anchors[name]["exit"][1]
statements.append(ast.CursivePosStatement(glyph, None, exit))
else:
raise NotImplementedError(pos)