1 files changed, 39 insertions, 0 deletions
diff --git a/Lib/fontTools/ttLib/tables/otTables.py b/Lib/fontTools/ttLib/tables/otTables.py
index b821fa36..31ff0122 100644
--- a/Lib/fontTools/ttLib/tables/otTables.py
+++ b/Lib/fontTools/ttLib/tables/otTables.py
@@ -12,6 +12,7 @@ from fontTools.misc.py23 import *
 from fontTools.misc.fixedTools import otRound
 from fontTools.misc.textTools import pad, safeEval
 from .otBase import BaseTable, FormatSwitchingBaseTable, ValueRecord, CountReference
+from fontTools.feaLib.lookupDebugInfo import LookupDebugInfo, LOOKUP_DEBUG_INFO_KEY
 import logging
 import struct
 
@@ -1187,6 +1188,44 @@ class COLR(BaseTable):
 		}
 
 
+class LookupList(BaseTable):
+	@property
+	def table(self):
+		for l in self.Lookup:
+			for st in l.SubTable:
+				if type(st).__name__.endswith("Subst"):
+					return "GSUB"
+				if type(st).__name__.endswith("Pos"):
+					return "GPOS"
+		raise ValueError
+
+	def toXML2(self, xmlWriter, font):
+		if not font or "Debg" not in font or LOOKUP_DEBUG_INFO_KEY not in font["Debg"].data:
+			return super().toXML2(xmlWriter, font)
+		debugData = font["Debg"].data[LOOKUP_DEBUG_INFO_KEY][self.table]
+		for conv in self.getConverters():
+			if conv.repeat:
+				value = getattr(self, conv.name, [])
+				for lookupIndex, item in enumerate(value):
+					if str(lookupIndex) in debugData:
+						info = LookupDebugInfo(*debugData[str(lookupIndex)])
+						tag = info.location
+						if info.name:
+							tag = f'{info.name}: {tag}'
+						if info.feature:
+							script,language,feature = info.feature
+							tag = f'{tag} in {feature} ({script}/{language})'
+						xmlWriter.comment(tag)
+						xmlWriter.newline()
+
+					conv.xmlWrite(xmlWriter, font, item, conv.name,
+							[("index", lookupIndex)])
+			else:
+				if conv.aux and not eval(conv.aux, None, vars(self)):
+					continue
+				value = getattr(self, conv.name, None) # TODO Handle defaults instead of defaulting to None!
+				conv.xmlWrite(xmlWriter, font, value, conv.name, [])
+
 class BaseGlyphRecordArray(BaseTable):
 
 	def preWrite(self, font):