class GPOSLookupType3(BaseSubTable):
"""
Deviation from spec:
- EntryExitRecordCount attribute is not implemented.
"""
__slots__ = ["Coverage", "EntryExitRecord"] + globalPositionSubTableSlots
def __init__(self):
super(GPOSLookupType3, self).__init__()
self.PosFormat = 1
self.Coverage = None
self.EntryExitRecord = []
def loadFromFontTools(self, subtable, lookup):
super(GPOSLookupType3, self).loadFromFontTools(subtable, lookup)
self.Coverage = Coverage().loadFromFontTools(subtable.Coverage)
self.EntryExitRecord = [EntryExitRecord().loadFromFontTools(entryExitRecord) for entryExitRecord in subtable.EntryExitRecord]
return self
def process(self, processed, glyphRecords, featureTag):
performedPos = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
nextRecord, nextRecordIndex = self._nextRecord(glyphRecords[1:])
if nextRecord is not None:
nextGlyph = nextRecord.glyphName
if nextGlyph in self.Coverage:
performedPos = True
exitIndex = self.Coverage.index(currentGlyph)
exitAnchor = self.EntryExitRecord[exitIndex].ExitAnchor
entryIndex = self.Coverage.index(nextGlyph)
entryAnchor = self.EntryExitRecord[entryIndex].EntryAnchor
if exitAnchor is not None and entryAnchor is not None:
currentRecord.xAdvance += exitAnchor.XCoordinate - currentRecord.advanceWidth - entryAnchor.XCoordinate
currentRecord.yAdvance += exitAnchor.YCoordinate - currentRecord.advanceHeight - entryAnchor.YCoordinate
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedPos
class GSUBLookupType3(BaseSubTable):
"""
Deviation from spec:
- AlternateSetCount attribute is not implemented.
"""
__slots__ = ["Coverage", "AlternateSet", "AlternateSetCount"
] + globalSubstitutionSubTableSlots
def __init__(self):
super(GSUBLookupType3, self).__init__()
self.SubstFormat = 1
self.AlternateSet = []
self.Coverage = None
self.AlternateSetCount = 0
def loadFromFontTools(self, subtable, lookup):
super(GSUBLookupType3, self).loadFromFontTools(subtable, lookup)
# fontTools has a custom implementation of this
# subtable type, so it needs to be converted
coverage = []
self.AlternateSet = []
for glyphName, alternates in subtable.alternates.items():
coverage.append(glyphName)
alternateSet = AlternateSet().loadFromFontTools(alternates)
self.AlternateSet.append(alternateSet)
self.Coverage = Coverage().loadFromFontTools(coverage)
self.AlternateSetCount = len(self.AlternateSet)
return self
def process(self, processed, glyphRecords, featureTag):
performedSub = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
performedSub = True
index = self.Coverage.index(currentGlyph)
alternateSet = self.AlternateSet[index]
alternates = alternateSet.Alternate
# special behavior for rand
if featureTag == "rand":
currentRecord.saveState(currentRecord.glyphName)
currentRecord.glyphName = choice(alternates)
# standard behavior
else:
if currentRecord._alternatesReference != currentGlyph:
currentRecord._alternatesReference = currentGlyph
currentRecord.alternates = []
currentRecord.alternates.extend(alternates)
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedSub
class GSUBLookupType3(BaseSubTable):
"""
Deviation from spec:
- AlternateSetCount attribute is not implemented.
"""
__slots__ = ["Coverage", "AlternateSet", "AlternateSetCount"] + globalSubstitutionSubTableSlots
def __init__(self):
super(GSUBLookupType3, self).__init__()
self.SubstFormat = 1
self.AlternateSet = []
self.Coverage = None
self.AlternateSetCount = 0
def loadFromFontTools(self, subtable, lookup):
super(GSUBLookupType3, self).loadFromFontTools(subtable, lookup)
# fontTools has a custom implementation of this
# subtable type, so it needs to be converted
coverage = []
self.AlternateSet = []
for glyphName, alternates in subtable.alternates.items():
coverage.append(glyphName)
alternateSet = AlternateSet().loadFromFontTools(alternates)
self.AlternateSet.append(alternateSet)
self.Coverage = Coverage().loadFromFontTools(coverage)
self.AlternateSetCount = len(self.AlternateSet)
return self
def process(self, processed, glyphRecords, featureTag):
performedSub = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
performedSub = True
index = self.Coverage.index(currentGlyph)
alternateSet = self.AlternateSet[index]
alternates = alternateSet.Alternate
# special behavior for rand
if featureTag == "rand":
currentRecord.saveState(currentRecord.glyphName)
currentRecord.glyphName = choice(alternates)
# standard behavior
else:
if currentRecord._alternatesReference != currentGlyph:
currentRecord._alternatesReference = currentGlyph
currentRecord.alternates = []
currentRecord.alternates.extend(alternates)
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedSub
class GPOSLookupType2Format1(BaseSubTable):
"""
Deviation from spec:
- PairSetCount attribute is not implemented.
"""
__slots__ = ["Coverage", "ValueFormat1", "ValueFormat2", "PairSet"] + globalPositionSubTableSlots
def __init__(self):
super(GPOSLookupType2Format1, self).__init__()
self.PosFormat = 1
self.Coverage = None
self.ValueFormat1 = None
self.ValueFormat2 = None
self.PairSet = []
def loadFromFontTools(self, subtable, lookup):
super(GPOSLookupType2Format1, self).loadFromFontTools(subtable, lookup)
self.Coverage = Coverage().loadFromFontTools(subtable.Coverage)
self.ValueFormat1 = subtable.ValueFormat1
self.ValueFormat2 = subtable.ValueFormat2
self.PairSet = [PairSet().loadFromFontTools(pairSet) for pairSet in subtable.PairSet]
return self
def process(self, processed, glyphRecords, featureTag):
performedPos = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
nextRecord, nextRecordIndex = self._nextRecord(glyphRecords[1:])
nextRecordIndex += 1
if nextRecord is not None:
nextGlyph = nextRecord.glyphName
pairSetIndex = self.Coverage.index(currentGlyph)
pairSet = self.PairSet[pairSetIndex]
for pairValueRecord in pairSet.PairValueRecord:
if nextGlyph == pairValueRecord.SecondGlyph:
performedPos = True
if self.ValueFormat1:
currentRecord += pairValueRecord.Value1
if self.ValueFormat2:
nextRecord += pairValueRecord.Value2
if self.ValueFormat2:
processed.extend(glyphRecords[:nextRecordIndex+1])
glyphRecords = glyphRecords[nextRecordIndex+1:]
else:
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
break
return processed, glyphRecords, performedPos
class GSUBLookupType1Format2(BaseSubTable):
"""
Deviation from spec:
- fontTools interprets Lookup Type 1 formats 1 and 2
into the same object structure. As such, only format 2
is needed.
- GlyphCount attribute is not implemented.
"""
__slots__ = ["Coverage", "Substitute"] + globalSubstitutionSubTableSlots
def __init__(self):
super(GSUBLookupType1Format2, self).__init__()
self.SubstFormat = 2
self.Substitute = []
self.Coverage = None
def loadFromFontTools(self, subtable, lookup):
super(GSUBLookupType1Format2, self).loadFromFontTools(subtable, lookup)
# fontTools has a custom implementation of this
# subtable type, so it needs to be converted
coverage = []
self.Substitute = []
for glyphName, alternate in sorted(subtable.mapping.items()):
coverage.append(glyphName)
self.Substitute.append(alternate)
self.Coverage = Coverage().loadFromFontTools(coverage)
return self
def process(self, processed, glyphRecords, featureTag):
performedSub = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
performedSub = True
index = self.Coverage.index(currentGlyph)
substitute = self.Substitute[index]
# special behavior for aalt
if featureTag == "aalt":
if currentRecord._alternatesReference != currentGlyph:
currentRecord._alternatesReference = currentGlyph
currentRecord.alternates = []
currentRecord.alternates.append(substitute)
# standard behavior
else:
currentRecord.saveState(currentRecord.glyphName)
currentRecord.glyphName = substitute
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedSub
class GSUBLookupType1Format2(BaseSubTable):
"""
Deviation from spec:
- fontTools interprets Lookup Type 1 formats 1 and 2
into the same object structure. As such, only format 2
is needed.
- GlyphCount attribute is not implemented.
"""
__slots__ = ["Coverage", "Substitute"] + globalSubstitutionSubTableSlots
def __init__(self):
super(GSUBLookupType1Format2, self).__init__()
self.SubstFormat = 2
self.Substitute = []
self.Coverage = None
def loadFromFontTools(self, subtable, lookup):
super(GSUBLookupType1Format2, self).loadFromFontTools(subtable, lookup)
# fontTools has a custom implementation of this
# subtable type, so it needs to be converted
coverage = []
self.Substitute = []
for glyphName, alternate in sorted(subtable.mapping.items()):
coverage.append(glyphName)
self.Substitute.append(alternate)
self.Coverage = Coverage().loadFromFontTools(coverage)
return self
def process(self, processed, glyphRecords, featureTag):
performedSub = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
performedSub = True
index = self.Coverage.index(currentGlyph)
substitute = self.Substitute[index]
# special behavior for aalt
if featureTag == "aalt":
if currentRecord._alternatesReference != currentGlyph:
currentRecord._alternatesReference = currentGlyph
currentRecord.alternates = []
currentRecord.alternates.append(substitute)
# standard behavior
else:
currentRecord.saveState(currentRecord.glyphName)
currentRecord.glyphName = substitute
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedSub
class GSUBLookupType2(BaseSubTable):
"""
Deviation from spec:
- SequenceCount attribute is not implemented.
"""
__slots__ = ["Coverage", "Sequence"] + globalSubstitutionSubTableSlots
def __init__(self):
super(GSUBLookupType2, self).__init__()
self.SubstFormat = 1
self.Coverage = None
self.Sequence = []
def loadFromFontTools(self, subtable, lookup):
super(GSUBLookupType2, self).loadFromFontTools(subtable, lookup)
try:
self.Coverage = Coverage().loadFromFontTools(subtable.Coverage)
self.Sequence = [
Sequence().loadFromFontTools(sequence)
for sequence in subtable.Sequence
]
except AttributeError:
# the API for MultipleSubst lookups changed with fonttools 3.1:
# https://github.com/fonttools/fonttools/pull/364
mapping = getattr(subtable, "mapping", {})
coverage = sorted(mapping.keys())
self.Coverage = Coverage(coverage)
self.Sequence = [Sequence(mapping[glyph]) for glyph in coverage]
return self
def process(self, processed, glyphRecords, featureTag):
performedSub = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
# XXX all glyph subsitituion states are destroyed here
performedSub = True
index = self.Coverage.index(currentGlyph)
sequence = self.Sequence[index]
substitute = sequence.Substitute
substitute = glyphNamesToGlyphRecords(substitute)
processed.extend(substitute)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedSub
class GPOSLookupType1Format2(BaseSubTable):
"""
Deviation from spec:
- ValueCount attribute is not implemented.
XXX need to handle ValueFormat?
"""
__slots__ = ["Coverage", "ValueFormat", "Value"] + globalPositionSubTableSlots
def __init__(self):
super(GPOSLookupType1Format2, self).__init__()
self.PosFormat = 2
self.Coverage = None
self.ValueFormat = None
self.Value = []
def loadFromFontTools(self, subtable, lookup):
super(GPOSLookupType1Format2, self).loadFromFontTools(subtable, lookup)
self.Coverage = Coverage().loadFromFontTools(subtable.Coverage)
self.ValueFormat = subtable.ValueFormat
self.Value = [ValueRecord().loadFromFontTools(value) for value in subtable.Value]
return self
def process(self, processed, glyphRecords, featureTag):
performedPos = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
performedPos = True
valueIndex = self.Coverage.index(currentGlyph)
value = self.Value[valueIndex]
currentRecord += value
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedPos
class GSUBLookupType2(BaseSubTable):
"""
Deviation from spec:
- SequenceCount attribute is not implemented.
"""
__slots__ = ["Coverage", "Sequence"] + globalSubstitutionSubTableSlots
def __init__(self):
super(GSUBLookupType2, self).__init__()
self.SubstFormat = 1
self.Coverage = None
self.Sequence = []
def loadFromFontTools(self, subtable, lookup):
super(GSUBLookupType2, self).loadFromFontTools(subtable, lookup)
self.Coverage = Coverage().loadFromFontTools(subtable.Coverage)
self.Sequence = [Sequence().loadFromFontTools(sequence) for sequence in subtable.Sequence]
return self
def process(self, processed, glyphRecords, featureTag):
performedSub = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
# XXX all glyph subsitituion states are destroyed here
performedSub = True
index = self.Coverage.index(currentGlyph)
sequence = self.Sequence[index]
substitute = sequence.Substitute
substitute = glyphNamesToGlyphRecords(substitute)
processed.extend(substitute)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedSub
class GPOSLookupType6(BaseSubTable):
"""
Deviation from spec:
- ClassCount attribute is not implemented.
Note: This could process things in a buggy way.
Not enough test cases are available to know for sure.
"""
__slots__ = ["Mark1Coverage", "Mark1Array", "Mark2Coverage", "Mark2Array"] + globalPositionSubTableSlots
def __init__(self):
super(GPOSLookupType6, self).__init__()
self.Mark1Coverage = None
self.Mark2Coverage = None
self.Mark1Array = None
self.Mark2Array = None
def loadFromFontTools(self, subtable, lookup):
super(GPOSLookupType6, self).loadFromFontTools(subtable, lookup)
self.Mark1Coverage = Coverage().loadFromFontTools(subtable.Mark1Coverage)
self.Mark2Coverage = Coverage().loadFromFontTools(subtable.Mark2Coverage)
self.Mark1Array = MarkArray().loadFromFontTools(subtable.Mark1Array)
self.Mark2Array = Mark2Array().loadFromFontTools(subtable.Mark2Array)
return self
def process(self, processed, glyphRecords, featureTag):
performedPos = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.Mark1Coverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
previousRecord = None
previousRecordIndex = 0
gdef = self._lookup()._gdef
while previousRecord is None:
for _previousRecord in reversed(processed):
previousRecordIndex -= 1
_previousGlyph = _previousRecord.glyphName
if not self._lookupFlagCoversGlyph(_previousGlyph):
previousRecord = _previousRecord
break
break
if previousRecord is not None:
previousGlyph = previousRecord.glyphName
if previousGlyph in self.Mark2Coverage:
performedPos = True
mark1CoverageIndex = self.Mark1Coverage.index(currentGlyph)
mark1Record = self.Mark1Array.MarkRecord[mark1CoverageIndex]
mark1Anchor = mark1Record.MarkAnchor
mark2CoverageIndex = self.Mark2Coverage.index(previousGlyph)
mark2Record = self.Mark2Array.Mark2Record[mark2CoverageIndex]
mark2Anchor = mark2Record.Mark2Anchor[mark1Record.Class]
xOffset, yOffset = _calculateAnchorDifference(mark2Anchor, mark1Anchor)
currentRecord.xPlacement += xOffset - previousRecord.advanceWidth
currentRecord.yPlacement += yOffset - previousRecord.advanceHeight
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedPos
class GPOSLookupType5(BaseSubTable):
"""
Deviation from spec:
- ClassCount attribute is not implemented.
Note: This could process things in a buggy way.
Not enough test cases are available to know for sure.
"""
__slots__ = ["MarkCoverage", "LigatureCoverage", "MarkArray", "LigatureArray"] + globalPositionSubTableSlots
def __init__(self):
super(GPOSLookupType5, self).__init__()
self.MarkCoverage = None
self.LigatureCoverage = None
self.MarkArray = None
self.LigatureArray = None
def loadFromFontTools(self, subtable, lookup):
super(GPOSLookupType5, self).loadFromFontTools(subtable, lookup)
self.MarkCoverage = Coverage().loadFromFontTools(subtable.MarkCoverage)
self.LigatureCoverage = Coverage().loadFromFontTools(subtable.LigatureCoverage)
self.MarkArray = MarkArray().loadFromFontTools(subtable.MarkArray)
self.LigatureArray = LigatureArray().loadFromFontTools(subtable.LigatureArray)
return self
def process(self, processed, glyphRecords, featureTag):
performedPos = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.MarkCoverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
previousRecord = None
previousRecordIndex = 0
gdef = self._lookup()._gdef
# look back to find the most recent glyph that:
# 1. is not covered by the lookup flag
# 2. is not a mark glyph (as defined in the GDEF)
while previousRecord is None:
for _previousRecord in reversed(processed):
previousRecordIndex -= 1
_previousGlyph = _previousRecord.glyphName
if not self._lookupFlagCoversGlyph(_previousGlyph):
if gdef is not None and gdef.GlyphClassDef[_previousGlyph] != 3:
previousRecord = _previousRecord
break
break
if previousRecord is not None:
previousGlyph = previousRecord.glyphName
if previousGlyph in self.LigatureCoverage:
performedPos = True
markCoverageIndex = self.MarkCoverage.index(currentGlyph)
markRecord = self.MarkArray.MarkRecord[markCoverageIndex]
markAnchor = markRecord.MarkAnchor
ligatureCoverageIndex = self.LigatureCoverage.index(previousGlyph)
ligatureAttach = self.LigatureArray.LigatureAttach[ligatureCoverageIndex]
componentIndex = abs(previousRecordIndex) - 1
componentRecord = ligatureAttach.ComponentRecord[componentIndex]
ligatureAnchor = componentRecord.LigatureAnchor[markRecord.Class]
if ligatureAnchor is not None:
xOffset, yOffset = _calculateAnchorDifference(ligatureAnchor, markAnchor)
currentRecord.xPlacement += xOffset - previousRecord.advanceWidth
currentRecord.yPlacement += yOffset - previousRecord.advanceHeight
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedPos
class GPOSLookupType4(BaseSubTable):
"""
Deviation from spec:
- ClassCount attribute is not implemented.
"""
__slots__ = ["MarkCoverage", "BaseCoverage", "MarkArray", "BaseArray"] + globalPositionSubTableSlots
def __init__(self):
super(GPOSLookupType4, self).__init__()
self.MarkCoverage = None
self.BaseCoverage = None
self.MarkArray = None
self.BaseArray = None
def loadFromFontTools(self, subtable, lookup):
super(GPOSLookupType4, self).loadFromFontTools(subtable, lookup)
self.MarkCoverage = Coverage().loadFromFontTools(subtable.MarkCoverage)
self.BaseCoverage = Coverage().loadFromFontTools(subtable.BaseCoverage)
self.MarkArray = MarkArray().loadFromFontTools(subtable.MarkArray)
self.BaseArray = BaseArray().loadFromFontTools(subtable.BaseArray)
return self
def process(self, processed, glyphRecords, featureTag):
performedPos = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
if currentGlyph in self.MarkCoverage:
if not self._lookupFlagCoversGlyph(currentGlyph):
previousRecord = None
previousRecordIndex = 0
gdef = self._lookup()._gdef
# look back to find the most recent glyph that:
# 1. is not covered by the lookup flag
# 2. is not a mark glyph (as defined in the GDEF)
while previousRecord is None:
for _previousRecord in reversed(processed):
previousRecordIndex -= 1
_previousGlyph = _previousRecord.glyphName
if not self._lookupFlagCoversGlyph(_previousGlyph):
if gdef is not None and gdef.GlyphClassDef[_previousGlyph] != 3:
previousRecord = _previousRecord
break
break
if previousRecord is not None:
previousGlyph = previousRecord.glyphName
if previousGlyph in self.BaseCoverage:
performedPos = True
markCoverageIndex = self.MarkCoverage.index(currentGlyph)
markRecord = self.MarkArray.MarkRecord[markCoverageIndex]
markAnchor = markRecord.MarkAnchor
baseCoverageIndex = self.BaseCoverage.index(previousGlyph)
baseRecord = self.BaseArray.BaseRecord[baseCoverageIndex]
baseAnchor = baseRecord.BaseAnchor[markRecord.Class]
xOffset, yOffset = _calculateAnchorDifference(baseAnchor, markAnchor)
currentRecord.xPlacement += xOffset - previousRecord.advanceWidth
currentRecord.yPlacement += yOffset - previousRecord.advanceHeight
processed.append(currentRecord)
glyphRecords = glyphRecords[1:]
return processed, glyphRecords, performedPos
class GSUBLookupType4(BaseSubTable):
"""
Deviation from spec:
- LigSetCount attribute is not implemented.
"""
__slots__ = ["Coverage", "LigatureSet"] + globalSubstitutionSubTableSlots
def __init__(self):
super(GSUBLookupType4, self).__init__()
self.SubstFormat = 1
self.LigatureSet = []
self.Coverage = None
def loadFromFontTools(self, subtable, lookup):
super(GSUBLookupType4, self).loadFromFontTools(subtable, lookup)
# fontTools has a custom implementation of this
# subtable type, so it needs to be converted
coverage = []
self.LigatureSet = []
for glyphName, ligature in subtable.ligatures.items():
ligatureSet = LigatureSet().loadFromFontTools(ligature)
self.LigatureSet.append(ligatureSet)
coverage.append(glyphName)
self.Coverage = Coverage().loadFromFontTools(coverage)
return self
def process(self, processed, glyphRecords, featureTag):
performedSub = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
lookupFlag = self._lookup().LookupFlag
if currentGlyph in self.Coverage:
if not lookupFlag.coversGlyph(currentGlyph):
while not performedSub:
coverageIndex = self.Coverage.index(currentGlyph)
ligatureSet = self.LigatureSet[coverageIndex]
for ligature in ligatureSet.Ligature:
component = ligature.Component
componentCount = ligature.CompCount
currentComponentIndex = 0
matchedRecordIndexes = set()
lastWasMatch = False
for index, glyphRecord in enumerate(glyphRecords[1:]):
glyphName = glyphRecord.glyphName
if not lookupFlag.coversGlyph(glyphName):
if not glyphName == component[
currentComponentIndex]:
lastWasMatch = False
break
else:
lastWasMatch = True
matchedRecordIndexes.add(index)
currentComponentIndex += 1
if currentComponentIndex == componentCount - 1:
break
if lastWasMatch and currentComponentIndex == componentCount - 1:
performedSub = True
currentRecord.saveState([currentGlyph] +
ligature.Component)
currentRecord.glyphName = ligature.LigGlyph
currentRecord.ligatureComponents = [
currentGlyph
] + ligature.Component
processed.append(currentRecord)
glyphRecords = [
record for index, record in enumerate(
glyphRecords[1:])
if index not in matchedRecordIndexes
]
break
break
return processed, glyphRecords, performedSub
class GSUBLookupType4(BaseSubTable):
"""
Deviation from spec:
- LigSetCount attribute is not implemented.
"""
__slots__ = ["Coverage", "LigatureSet"] + globalSubstitutionSubTableSlots
def __init__(self):
super(GSUBLookupType4, self).__init__()
self.SubstFormat = 1
self.LigatureSet = []
self.Coverage = None
def loadFromFontTools(self, subtable, lookup):
super(GSUBLookupType4, self).loadFromFontTools(subtable, lookup)
# fontTools has a custom implementation of this
# subtable type, so it needs to be converted
coverage = []
self.LigatureSet = []
for glyphName, ligature in subtable.ligatures.items():
ligatureSet = LigatureSet().loadFromFontTools(ligature)
self.LigatureSet.append(ligatureSet)
coverage.append(glyphName)
self.Coverage = Coverage().loadFromFontTools(coverage)
return self
def process(self, processed, glyphRecords, featureTag):
performedSub = False
currentRecord = glyphRecords[0]
currentGlyph = currentRecord.glyphName
lookupFlag = self._lookup().LookupFlag
if currentGlyph in self.Coverage:
if not lookupFlag.coversGlyph(currentGlyph):
while not performedSub:
coverageIndex = self.Coverage.index(currentGlyph)
ligatureSet = self.LigatureSet[coverageIndex]
for ligature in ligatureSet.Ligature:
component = ligature.Component
componentCount = ligature.CompCount
currentComponentIndex = 0
matchedRecordIndexes = set()
lastWasMatch = False
for index, glyphRecord in enumerate(glyphRecords[1:]):
glyphName = glyphRecord.glyphName
if not lookupFlag.coversGlyph(glyphName):
if not glyphName == component[currentComponentIndex]:
lastWasMatch = False
break
else:
lastWasMatch = True
matchedRecordIndexes.add(index)
currentComponentIndex += 1
if currentComponentIndex == componentCount - 1:
break
if lastWasMatch and currentComponentIndex == componentCount - 1:
performedSub = True
currentRecord.saveState([currentGlyph] + ligature.Component)
currentRecord.glyphName = ligature.LigGlyph
currentRecord.ligatureComponents = [currentGlyph] + ligature.Component
processed.append(currentRecord)
glyphRecords = [record for index, record in enumerate(glyphRecords[1:]) if index not in matchedRecordIndexes]
break
break
return processed, glyphRecords, performedSub