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Ignore class=0 when reading & writing ClassDef objects

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class=0 items might be added as an optimization.  They have no semantic value.
Ignore them.

Fixes the last of mtiLib tests.
This commit is contained in:
Behdad Esfahbod 2016-12-26 17:26:14 -05:00
parent 101303ab50
commit 2d3610bb6b
2 changed files with 8 additions and 8 deletions
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2
Lib/fontTools/mtiLib/testdata/mti/gposkernset.ttx.GPOS vendored
View File

@ -54,8 +54,6 @@
<ClassDef glyph="Ocircumflex" class="2"/>
<ClassDef glyph="Ograve" class="2"/>
<ClassDef glyph="T" class="3"/>
<ClassDef glyph="V" class="0"/>
<ClassDef glyph="acircumflex" class="0"/>
</ClassDef1>
<ClassDef2 Format="2">
<ClassDef glyph="V" class="1"/>

14
Lib/fontTools/ttLib/tables/otTables.py
View File

@ -389,7 +389,8 @@ class ClassDef(FormatSwitchingBaseTable):
endID = len(glyphOrder)
for glyphID, cls in zip(range(startID, endID), classList):
classDefs[glyphOrder[glyphID]] = cls
if cls:
classDefs[glyphOrder[glyphID]] = cls
elif self.Format == 2:
records = rawTable["ClassRangeRecord"]
@ -412,7 +413,8 @@ class ClassDef(FormatSwitchingBaseTable):
# but none that we have seen in the wild.
endID = len(glyphOrder)
for glyphID in range(startID, endID):
classDefs[glyphOrder[glyphID]] = cls
if cls:
classDefs[glyphOrder[glyphID]] = cls
else:
assert 0, "unknown format: %s" % self.Format
self.classDefs = classDefs
@ -421,13 +423,13 @@ class ClassDef(FormatSwitchingBaseTable):
classDefs = getattr(self, "classDefs", None)
if classDefs is None:
classDefs = self.classDefs = {}
items = list(classDefs.items())
format = 2
rawTable = {"ClassRangeRecord": []}
getGlyphID = font.getGlyphID
for i in range(len(items)):
glyphName, cls = items[i]
items[i] = getGlyphID(glyphName), glyphName, cls
items = []
for glyphName, cls in classDefs.items():
if not cls: continue
items.append((getGlyphID(glyphName), glyphName, cls))
items.sort()
if items:
last, lastName, lastCls = items[0]