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527 lines
16 KiB
Python
527 lines
16 KiB
Python
# Copyright 2013 Google, Inc. All Rights Reserved.
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#
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# Google Author(s): Behdad Esfahbod, Roozbeh Pournader
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from fontTools import ttLib
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from fontTools.ttLib.tables.DefaultTable import DefaultTable
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from fontTools.ttLib.tables import otTables
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from fontTools.merge.base import add_method, mergeObjects
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from fontTools.merge.util import *
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import logging
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log = logging.getLogger("fontTools.merge")
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def mergeLookupLists(lst):
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# TODO Do smarter merge.
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return sumLists(lst)
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def mergeFeatures(lst):
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assert lst
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self = otTables.Feature()
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self.FeatureParams = None
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self.LookupListIndex = mergeLookupLists(
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[l.LookupListIndex for l in lst if l.LookupListIndex]
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)
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self.LookupCount = len(self.LookupListIndex)
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return self
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def mergeFeatureLists(lst):
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d = {}
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for l in lst:
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for f in l:
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tag = f.FeatureTag
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if tag not in d:
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d[tag] = []
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d[tag].append(f.Feature)
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ret = []
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for tag in sorted(d.keys()):
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rec = otTables.FeatureRecord()
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rec.FeatureTag = tag
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rec.Feature = mergeFeatures(d[tag])
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ret.append(rec)
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return ret
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def mergeLangSyses(lst):
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assert lst
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# TODO Support merging ReqFeatureIndex
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assert all(l.ReqFeatureIndex == 0xFFFF for l in lst)
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self = otTables.LangSys()
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self.LookupOrder = None
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self.ReqFeatureIndex = 0xFFFF
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self.FeatureIndex = mergeFeatureLists(
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[l.FeatureIndex for l in lst if l.FeatureIndex]
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)
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self.FeatureCount = len(self.FeatureIndex)
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return self
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def mergeScripts(lst):
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assert lst
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if len(lst) == 1:
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return lst[0]
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langSyses = {}
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for sr in lst:
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for lsr in sr.LangSysRecord:
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if lsr.LangSysTag not in langSyses:
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langSyses[lsr.LangSysTag] = []
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langSyses[lsr.LangSysTag].append(lsr.LangSys)
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lsrecords = []
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for tag, langSys_list in sorted(langSyses.items()):
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lsr = otTables.LangSysRecord()
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lsr.LangSys = mergeLangSyses(langSys_list)
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lsr.LangSysTag = tag
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lsrecords.append(lsr)
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self = otTables.Script()
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self.LangSysRecord = lsrecords
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self.LangSysCount = len(lsrecords)
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dfltLangSyses = [s.DefaultLangSys for s in lst if s.DefaultLangSys]
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if dfltLangSyses:
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self.DefaultLangSys = mergeLangSyses(dfltLangSyses)
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else:
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self.DefaultLangSys = None
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return self
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def mergeScriptRecords(lst):
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d = {}
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for l in lst:
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for s in l:
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tag = s.ScriptTag
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if tag not in d:
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d[tag] = []
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d[tag].append(s.Script)
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ret = []
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for tag in sorted(d.keys()):
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rec = otTables.ScriptRecord()
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rec.ScriptTag = tag
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rec.Script = mergeScripts(d[tag])
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ret.append(rec)
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return ret
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otTables.ScriptList.mergeMap = {
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"ScriptCount": lambda lst: None, # TODO
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"ScriptRecord": mergeScriptRecords,
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}
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otTables.BaseScriptList.mergeMap = {
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"BaseScriptCount": lambda lst: None, # TODO
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# TODO: Merge duplicate entries
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"BaseScriptRecord": lambda lst: sorted(
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sumLists(lst), key=lambda s: s.BaseScriptTag
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),
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}
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otTables.FeatureList.mergeMap = {
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"FeatureCount": sum,
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"FeatureRecord": lambda lst: sorted(sumLists(lst), key=lambda s: s.FeatureTag),
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}
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otTables.LookupList.mergeMap = {
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"LookupCount": sum,
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"Lookup": sumLists,
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}
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otTables.Coverage.mergeMap = {
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"Format": min,
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"glyphs": sumLists,
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}
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otTables.ClassDef.mergeMap = {
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"Format": min,
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"classDefs": sumDicts,
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}
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otTables.LigCaretList.mergeMap = {
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"Coverage": mergeObjects,
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"LigGlyphCount": sum,
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"LigGlyph": sumLists,
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}
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otTables.AttachList.mergeMap = {
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"Coverage": mergeObjects,
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"GlyphCount": sum,
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"AttachPoint": sumLists,
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}
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# XXX Renumber MarkFilterSets of lookups
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otTables.MarkGlyphSetsDef.mergeMap = {
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"MarkSetTableFormat": equal,
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"MarkSetCount": sum,
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"Coverage": sumLists,
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}
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otTables.Axis.mergeMap = {
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"*": mergeObjects,
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}
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# XXX Fix BASE table merging
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otTables.BaseTagList.mergeMap = {
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"BaseTagCount": sum,
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"BaselineTag": sumLists,
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}
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otTables.GDEF.mergeMap = otTables.GSUB.mergeMap = otTables.GPOS.mergeMap = (
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otTables.BASE.mergeMap
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) = otTables.JSTF.mergeMap = otTables.MATH.mergeMap = {
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"*": mergeObjects,
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"Version": max,
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}
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ttLib.getTableClass("GDEF").mergeMap = ttLib.getTableClass("GSUB").mergeMap = (
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ttLib.getTableClass("GPOS").mergeMap
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) = ttLib.getTableClass("BASE").mergeMap = ttLib.getTableClass(
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"JSTF"
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).mergeMap = ttLib.getTableClass(
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"MATH"
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).mergeMap = {
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"tableTag": onlyExisting(equal), # XXX clean me up
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"table": mergeObjects,
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}
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@add_method(ttLib.getTableClass("GSUB"))
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def merge(self, m, tables):
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assert len(tables) == len(m.duplicateGlyphsPerFont)
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for i, (table, dups) in enumerate(zip(tables, m.duplicateGlyphsPerFont)):
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if not dups:
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continue
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if table is None or table is NotImplemented:
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log.warning(
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"Have non-identical duplicates to resolve for '%s' but no GSUB. Are duplicates intended?: %s",
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m.fonts[i]._merger__name,
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dups,
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)
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continue
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synthFeature = None
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synthLookup = None
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for script in table.table.ScriptList.ScriptRecord:
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if script.ScriptTag == "DFLT":
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continue # XXX
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for langsys in [script.Script.DefaultLangSys] + [
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l.LangSys for l in script.Script.LangSysRecord
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]:
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if langsys is None:
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continue # XXX Create!
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feature = [v for v in langsys.FeatureIndex if v.FeatureTag == "locl"]
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assert len(feature) <= 1
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if feature:
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feature = feature[0]
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else:
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if not synthFeature:
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synthFeature = otTables.FeatureRecord()
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synthFeature.FeatureTag = "locl"
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f = synthFeature.Feature = otTables.Feature()
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f.FeatureParams = None
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f.LookupCount = 0
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f.LookupListIndex = []
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table.table.FeatureList.FeatureRecord.append(synthFeature)
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table.table.FeatureList.FeatureCount += 1
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feature = synthFeature
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langsys.FeatureIndex.append(feature)
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langsys.FeatureIndex.sort(key=lambda v: v.FeatureTag)
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if not synthLookup:
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subtable = otTables.SingleSubst()
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subtable.mapping = dups
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synthLookup = otTables.Lookup()
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synthLookup.LookupFlag = 0
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synthLookup.LookupType = 1
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synthLookup.SubTableCount = 1
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synthLookup.SubTable = [subtable]
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if table.table.LookupList is None:
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# mtiLib uses None as default value for LookupList,
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# while feaLib points to an empty array with count 0
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# TODO: make them do the same
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table.table.LookupList = otTables.LookupList()
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table.table.LookupList.Lookup = []
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table.table.LookupList.LookupCount = 0
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table.table.LookupList.Lookup.append(synthLookup)
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table.table.LookupList.LookupCount += 1
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if feature.Feature.LookupListIndex[:1] != [synthLookup]:
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feature.Feature.LookupListIndex[:0] = [synthLookup]
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feature.Feature.LookupCount += 1
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DefaultTable.merge(self, m, tables)
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return self
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@add_method(
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otTables.SingleSubst,
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otTables.MultipleSubst,
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otTables.AlternateSubst,
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otTables.LigatureSubst,
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otTables.ReverseChainSingleSubst,
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otTables.SinglePos,
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otTables.PairPos,
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otTables.CursivePos,
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otTables.MarkBasePos,
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otTables.MarkLigPos,
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otTables.MarkMarkPos,
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)
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def mapLookups(self, lookupMap):
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pass
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# Copied and trimmed down from subset.py
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@add_method(
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otTables.ContextSubst,
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otTables.ChainContextSubst,
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otTables.ContextPos,
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otTables.ChainContextPos,
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)
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def __merge_classify_context(self):
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class ContextHelper(object):
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def __init__(self, klass, Format):
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if klass.__name__.endswith("Subst"):
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Typ = "Sub"
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Type = "Subst"
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else:
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Typ = "Pos"
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Type = "Pos"
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if klass.__name__.startswith("Chain"):
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Chain = "Chain"
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else:
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Chain = ""
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ChainTyp = Chain + Typ
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self.Typ = Typ
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self.Type = Type
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self.Chain = Chain
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self.ChainTyp = ChainTyp
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self.LookupRecord = Type + "LookupRecord"
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if Format == 1:
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self.Rule = ChainTyp + "Rule"
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self.RuleSet = ChainTyp + "RuleSet"
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elif Format == 2:
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self.Rule = ChainTyp + "ClassRule"
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self.RuleSet = ChainTyp + "ClassSet"
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if self.Format not in [1, 2, 3]:
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return None # Don't shoot the messenger; let it go
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if not hasattr(self.__class__, "_merge__ContextHelpers"):
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self.__class__._merge__ContextHelpers = {}
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if self.Format not in self.__class__._merge__ContextHelpers:
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helper = ContextHelper(self.__class__, self.Format)
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self.__class__._merge__ContextHelpers[self.Format] = helper
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return self.__class__._merge__ContextHelpers[self.Format]
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@add_method(
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otTables.ContextSubst,
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otTables.ChainContextSubst,
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otTables.ContextPos,
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otTables.ChainContextPos,
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)
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def mapLookups(self, lookupMap):
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c = self.__merge_classify_context()
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if self.Format in [1, 2]:
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for rs in getattr(self, c.RuleSet):
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if not rs:
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continue
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for r in getattr(rs, c.Rule):
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if not r:
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continue
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for ll in getattr(r, c.LookupRecord):
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if not ll:
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continue
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ll.LookupListIndex = lookupMap[ll.LookupListIndex]
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elif self.Format == 3:
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for ll in getattr(self, c.LookupRecord):
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if not ll:
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continue
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ll.LookupListIndex = lookupMap[ll.LookupListIndex]
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else:
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assert 0, "unknown format: %s" % self.Format
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@add_method(otTables.ExtensionSubst, otTables.ExtensionPos)
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def mapLookups(self, lookupMap):
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if self.Format == 1:
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self.ExtSubTable.mapLookups(lookupMap)
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else:
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assert 0, "unknown format: %s" % self.Format
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@add_method(otTables.Lookup)
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def mapLookups(self, lookupMap):
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for st in self.SubTable:
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if not st:
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continue
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st.mapLookups(lookupMap)
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@add_method(otTables.LookupList)
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def mapLookups(self, lookupMap):
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for l in self.Lookup:
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if not l:
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continue
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l.mapLookups(lookupMap)
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@add_method(otTables.Lookup)
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def mapMarkFilteringSets(self, markFilteringSetMap):
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if self.LookupFlag & 0x0010:
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self.MarkFilteringSet = markFilteringSetMap[self.MarkFilteringSet]
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@add_method(otTables.LookupList)
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def mapMarkFilteringSets(self, markFilteringSetMap):
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for l in self.Lookup:
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if not l:
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continue
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l.mapMarkFilteringSets(markFilteringSetMap)
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@add_method(otTables.Feature)
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def mapLookups(self, lookupMap):
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self.LookupListIndex = [lookupMap[i] for i in self.LookupListIndex]
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@add_method(otTables.FeatureList)
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def mapLookups(self, lookupMap):
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for f in self.FeatureRecord:
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if not f or not f.Feature:
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continue
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f.Feature.mapLookups(lookupMap)
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@add_method(otTables.DefaultLangSys, otTables.LangSys)
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def mapFeatures(self, featureMap):
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self.FeatureIndex = [featureMap[i] for i in self.FeatureIndex]
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if self.ReqFeatureIndex != 65535:
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self.ReqFeatureIndex = featureMap[self.ReqFeatureIndex]
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@add_method(otTables.Script)
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def mapFeatures(self, featureMap):
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if self.DefaultLangSys:
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self.DefaultLangSys.mapFeatures(featureMap)
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for l in self.LangSysRecord:
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if not l or not l.LangSys:
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continue
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l.LangSys.mapFeatures(featureMap)
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@add_method(otTables.ScriptList)
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def mapFeatures(self, featureMap):
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for s in self.ScriptRecord:
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if not s or not s.Script:
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continue
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s.Script.mapFeatures(featureMap)
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def layoutPreMerge(font):
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# Map indices to references
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GDEF = font.get("GDEF")
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GSUB = font.get("GSUB")
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GPOS = font.get("GPOS")
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for t in [GSUB, GPOS]:
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if not t:
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continue
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if t.table.LookupList:
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lookupMap = {i: v for i, v in enumerate(t.table.LookupList.Lookup)}
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t.table.LookupList.mapLookups(lookupMap)
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t.table.FeatureList.mapLookups(lookupMap)
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if (
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GDEF
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and GDEF.table.Version >= 0x00010002
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and GDEF.table.MarkGlyphSetsDef
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):
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markFilteringSetMap = {
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i: v for i, v in enumerate(GDEF.table.MarkGlyphSetsDef.Coverage)
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}
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t.table.LookupList.mapMarkFilteringSets(markFilteringSetMap)
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if t.table.FeatureList and t.table.ScriptList:
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featureMap = {i: v for i, v in enumerate(t.table.FeatureList.FeatureRecord)}
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t.table.ScriptList.mapFeatures(featureMap)
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# TODO FeatureParams nameIDs
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def layoutPostMerge(font):
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# Map references back to indices
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GDEF = font.get("GDEF")
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GSUB = font.get("GSUB")
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GPOS = font.get("GPOS")
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for t in [GSUB, GPOS]:
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if not t:
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continue
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if t.table.FeatureList and t.table.ScriptList:
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# Collect unregistered (new) features.
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featureMap = GregariousIdentityDict(t.table.FeatureList.FeatureRecord)
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t.table.ScriptList.mapFeatures(featureMap)
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# Record used features.
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featureMap = AttendanceRecordingIdentityDict(
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t.table.FeatureList.FeatureRecord
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)
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t.table.ScriptList.mapFeatures(featureMap)
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usedIndices = featureMap.s
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# Remove unused features
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t.table.FeatureList.FeatureRecord = [
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f
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for i, f in enumerate(t.table.FeatureList.FeatureRecord)
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if i in usedIndices
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]
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# Map back to indices.
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featureMap = NonhashableDict(t.table.FeatureList.FeatureRecord)
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t.table.ScriptList.mapFeatures(featureMap)
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t.table.FeatureList.FeatureCount = len(t.table.FeatureList.FeatureRecord)
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if t.table.LookupList:
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# Collect unregistered (new) lookups.
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lookupMap = GregariousIdentityDict(t.table.LookupList.Lookup)
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t.table.FeatureList.mapLookups(lookupMap)
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t.table.LookupList.mapLookups(lookupMap)
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# Record used lookups.
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lookupMap = AttendanceRecordingIdentityDict(t.table.LookupList.Lookup)
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t.table.FeatureList.mapLookups(lookupMap)
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t.table.LookupList.mapLookups(lookupMap)
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usedIndices = lookupMap.s
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# Remove unused lookups
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t.table.LookupList.Lookup = [
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l for i, l in enumerate(t.table.LookupList.Lookup) if i in usedIndices
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]
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# Map back to indices.
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lookupMap = NonhashableDict(t.table.LookupList.Lookup)
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t.table.FeatureList.mapLookups(lookupMap)
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t.table.LookupList.mapLookups(lookupMap)
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t.table.LookupList.LookupCount = len(t.table.LookupList.Lookup)
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if GDEF and GDEF.table.Version >= 0x00010002:
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markFilteringSetMap = NonhashableDict(
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GDEF.table.MarkGlyphSetsDef.Coverage
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)
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t.table.LookupList.mapMarkFilteringSets(markFilteringSetMap)
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# TODO FeatureParams nameIDs
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