diff options
Diffstat (limited to 'Lib/fontTools/otlLib/maxContextCalc.py')
| -rw-r--r-- | Lib/fontTools/otlLib/maxContextCalc.py | 49 |
1 files changed, 22 insertions, 27 deletions
diff --git a/Lib/fontTools/otlLib/maxContextCalc.py b/Lib/fontTools/otlLib/maxContextCalc.py index 5659310f..03e7561b 100644 --- a/Lib/fontTools/otlLib/maxContextCalc.py +++ b/Lib/fontTools/otlLib/maxContextCalc.py @@ -1,13 +1,11 @@ -from __future__ import print_function, division, absolute_import, unicode_literals - -__all__ = ['maxCtxFont'] +__all__ = ["maxCtxFont"] def maxCtxFont(font): """Calculate the usMaxContext value for an entire font.""" maxCtx = 0 - for tag in ('GSUB', 'GPOS'): + for tag in ("GSUB", "GPOS"): if tag not in font: continue table = font[tag].table @@ -25,62 +23,59 @@ def maxCtxSubtable(maxCtx, tag, lookupType, st): """ # single positioning, single / multiple substitution - if (tag == 'GPOS' and lookupType == 1) or ( - tag == 'GSUB' and lookupType in (1, 2, 3)): + if (tag == "GPOS" and lookupType == 1) or ( + tag == "GSUB" and lookupType in (1, 2, 3) + ): maxCtx = max(maxCtx, 1) # pair positioning - elif tag == 'GPOS' and lookupType == 2: + elif tag == "GPOS" and lookupType == 2: maxCtx = max(maxCtx, 2) # ligatures - elif tag == 'GSUB' and lookupType == 4: + elif tag == "GSUB" and lookupType == 4: for ligatures in st.ligatures.values(): for ligature in ligatures: maxCtx = max(maxCtx, ligature.CompCount) # context - elif (tag == 'GPOS' and lookupType == 7) or ( - tag == 'GSUB' and lookupType == 5): - maxCtx = maxCtxContextualSubtable( - maxCtx, st, 'Pos' if tag == 'GPOS' else 'Sub') + elif (tag == "GPOS" and lookupType == 7) or (tag == "GSUB" and lookupType == 5): + maxCtx = maxCtxContextualSubtable(maxCtx, st, "Pos" if tag == "GPOS" else "Sub") # chained context - elif (tag == 'GPOS' and lookupType == 8) or ( - tag == 'GSUB' and lookupType == 6): + elif (tag == "GPOS" and lookupType == 8) or (tag == "GSUB" and lookupType == 6): maxCtx = maxCtxContextualSubtable( - maxCtx, st, 'Pos' if tag == 'GPOS' else 'Sub', 'Chain') + maxCtx, st, "Pos" if tag == "GPOS" else "Sub", "Chain" + ) # extensions - elif (tag == 'GPOS' and lookupType == 9) or ( - tag == 'GSUB' and lookupType == 7): - maxCtx = maxCtxSubtable( - maxCtx, tag, st.ExtensionLookupType, st.ExtSubTable) + elif (tag == "GPOS" and lookupType == 9) or (tag == "GSUB" and lookupType == 7): + maxCtx = maxCtxSubtable(maxCtx, tag, st.ExtensionLookupType, st.ExtSubTable) # reverse-chained context - elif tag == 'GSUB' and lookupType == 8: - maxCtx = maxCtxContextualRule(maxCtx, st, 'Reverse') + elif tag == "GSUB" and lookupType == 8: + maxCtx = maxCtxContextualRule(maxCtx, st, "Reverse") return maxCtx -def maxCtxContextualSubtable(maxCtx, st, ruleType, chain=''): +def maxCtxContextualSubtable(maxCtx, st, ruleType, chain=""): """Calculate usMaxContext based on a contextual feature subtable.""" if st.Format == 1: - for ruleset in getattr(st, '%s%sRuleSet' % (chain, ruleType)): + for ruleset in getattr(st, "%s%sRuleSet" % (chain, ruleType)): if ruleset is None: continue - for rule in getattr(ruleset, '%s%sRule' % (chain, ruleType)): + for rule in getattr(ruleset, "%s%sRule" % (chain, ruleType)): if rule is None: continue maxCtx = maxCtxContextualRule(maxCtx, rule, chain) elif st.Format == 2: - for ruleset in getattr(st, '%s%sClassSet' % (chain, ruleType)): + for ruleset in getattr(st, "%s%sClassSet" % (chain, ruleType)): if ruleset is None: continue - for rule in getattr(ruleset, '%s%sClassRule' % (chain, ruleType)): + for rule in getattr(ruleset, "%s%sClassRule" % (chain, ruleType)): if rule is None: continue maxCtx = maxCtxContextualRule(maxCtx, rule, chain) @@ -96,6 +91,6 @@ def maxCtxContextualRule(maxCtx, st, chain): if not chain: return max(maxCtx, st.GlyphCount) - elif chain == 'Reverse': + elif chain == "Reverse": return max(maxCtx, st.GlyphCount + st.LookAheadGlyphCount) return max(maxCtx, st.InputGlyphCount + st.LookAheadGlyphCount) |