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This commit is contained in:
Behdad Esfahbod 2013-07-23 22:51:50 -04:00
parent f23d4c478c
commit b178dcaa7b
1 changed files with 27 additions and 22 deletions
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49
pyotlss.py
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@ -293,15 +293,16 @@ def collect_lookups (self):
@add_method(fontTools.ttLib.tables.otTables.ContextSubst, fontTools.ttLib.tables.otTables.ChainContextSubst,
fontTools.ttLib.tables.otTables.ContextPos, fontTools.ttLib.tables.otTables.ChainContextPos)
def __classify_context (self):
class ContextContext:
def __init__ (self, lookup):
if lookup.__class__.__name__.endswith ('Subst'):
class ContextHelper:
def __init__ (self, klass, Format):
if klass.__name__.endswith ('Subst'):
Typ = 'Sub'
Type = 'Subst'
else:
Typ = 'Pos'
Type = 'Pos'
if lookup.__class__.__name__.startswith ('Chain'):
if klass.__name__.startswith ('Chain'):
Chain = 'Chain'
else:
Chain = ''
@ -315,28 +316,28 @@ def __classify_context (self):
self.LookupRecord = Type+'LookupRecord'
def ContextData (r):
if r.Format == 1:
if Format == 1:
assert 0
return r.Input
elif r.Format == 2:
elif Format == 2:
return [r.ClassDef]
elif r.Format == 3:
elif Format == 3:
assert 0
return r.Coverage
else:
assert 0, "unknown format: %s" % r.Format
assert 0, "unknown format: %s" % Format
def ChainContextData (r):
if r.Format == 1:
if Format == 1:
assert 0
return r.Backtrack + r.Input + r.LookAhead
elif r.Format == 2:
elif Format == 2:
return [r.LookAheadClassDef, r.InputClassDef, r.BacktrackClassDef]
elif r.Format == 3:
elif Format == 3:
assert 0
return r.LookAheadCoverage + r.InputCoverage + r.BacktrackCoverage
else:
assert 0, "unknown format: %s" % Format
def RuleData (r, Format):
def RuleData (r):
if Format == 1:
return r.Input
elif Format == 2:
@ -345,7 +346,7 @@ def __classify_context (self):
return r.Coverage
else:
assert 0, "unknown format: %s" % Format
def ChainRuleData (r, Format):
def ChainRuleData (r):
if Format == 1:
return r.Backtrack + r.Input + r.LookAhead
elif Format == 2:
@ -374,9 +375,13 @@ def __classify_context (self):
self.ClassRuleSetCount = ChainTyp+'ClassSetCount'
self.ClassDef = 'InputClassDef' if Chain else 'ClassDef'
if not hasattr (self.__class__, "__ContextContext"):
self.__class__.__ContextContext = ContextContext (self)
return self.__class__.__ContextContext
if self.Format not in [1, 2, 3]:
return None # Don't shoot the messenger; let it go
if not hasattr (self.__class__, "__ContextHelpers"):
self.__class__.__ContextHelpers = {}
if self.Format not in self.__class__.__ContextHelpers:
self.__class__.__ContextHelpers[self.Format] = ContextHelper (self.__class__, self.Format)
return self.__class__.__ContextHelpers[self.Format]
@add_method(fontTools.ttLib.tables.otTables.ContextSubst, fontTools.ttLib.tables.otTables.ChainContextSubst)
def closure_glyphs (self, glyphs, table):
@ -388,7 +393,7 @@ def closure_glyphs (self, glyphs, table):
return sum ((table.table.LookupList.Lookup[ll.LookupListIndex].closure_glyphs (glyphs, table) \
for i in indices \
for r in getattr (rss[i], c.Rule) \
if r and all (g in glyphs for g in c.RuleData (r, self.Format)) \
if r and all (g in glyphs for g in c.RuleData (r)) \
for ll in getattr (r, c.LookupRecord) if ll \
), [])
elif self.Format == 2:
@ -400,11 +405,11 @@ def closure_glyphs (self, glyphs, table):
for i in indices \
for r in getattr (rss[i], c.ClassRule) \
if r and all (cd.intersects_glyphs_class (glyphs, k) \
for cd,k in zip (c.ContextData (self), c.RuleData (r, self.Format))) \
for cd,k in zip (c.ContextData (self), c.RuleData (r))) \
for ll in getattr (r, c.LookupRecord) if ll \
), [])
elif self.Format == 3:
if not all (x.intersect_glyphs (glyphs) for x in c.RuleData (self, self.Format)):
if not all (x.intersect_glyphs (glyphs) for x in c.RuleData (self)):
return []
return sum ((table.table.LookupList.Lookup[ll.LookupListIndex].closure_glyphs (glyphs, table) \
for ll in getattr (self, c.LookupRecord) if ll), [])
@ -424,7 +429,7 @@ def subset_glyphs (self, glyphs):
if rs:
ss = getattr (rs, c.Rule)
ss = [r for r in ss \
if r and all (g in glyphs for g in c.RuleData (r, self.Format))]
if r and all (g in glyphs for g in c.RuleData (r))]
setattr (rs, c.Rule, ss)
setattr (rs, c.RuleCount, len (ss))
# Prune empty subrulesets
@ -447,7 +452,7 @@ def subset_glyphs (self, glyphs):
ss = getattr (rs, c.ClassRule)
ss = [r for r in ss \
if r and all (k in klass_map \
for klass_map,k in zip (klass_maps, c.RuleData (r, self.Format)))]
for klass_map,k in zip (klass_maps, c.RuleData (r)))]
setattr (rs, c.ClassRule, ss)
setattr (rs, c.ClassRuleCount, len (ss))
@ -469,7 +474,7 @@ def subset_glyphs (self, glyphs):
return all (x.subset_glyphs (glyphs) for x in c.ContextData (self))
elif self.Format == 3:
return all (x.subset_glyphs (glyphs) for x in c.RuleData (self, self.Format))
return all (x.subset_glyphs (glyphs) for x in c.RuleData (self))
else:
assert 0, "unknown format: %s" % self.Format