def test_getKerningClasses(self, FontClass):
font = FontClass()
for i in range(65, 65 + 6): # A..F
font.newGlyph(chr(i))
font.groups.update({
"public.kern1.A": ["A", "B"],
"public.kern2.C": ["C", "D"]
})
# simulate a name clash between pre-existing class definitions in
# feature file, and those generated by the feature writer
font.features.text = "@kern1.A = [E F];"
writer = KernFeatureWriter()
feaFile = parseLayoutFeatures(font)
side1Classes, side2Classes = KernFeatureWriter.getKerningClasses(
font, feaFile)
assert "public.kern1.A" in side1Classes
# the new class gets a unique name
assert side1Classes["public.kern1.A"].name == "kern1.A_1"
assert getGlyphs(side1Classes["public.kern1.A"]) == ["A", "B"]
assert "public.kern2.C" in side2Classes
assert side2Classes["public.kern2.C"].name == "kern2.C"
assert getGlyphs(side2Classes["public.kern2.C"]) == ["C", "D"]
def test_correct_invalid_class_names(self, FontClass):
font = FontClass()
for i in range(65, 65 + 12): # A..L
font.newGlyph(chr(i))
font.groups.update(
{
"public.kern1.foo$": ["A", "B", "C"],
"public.kern1.foo@": ["D", "E", "F"],
"@public.kern2.bar": ["G", "H", "I"],
"public.kern2.bar&": ["J", "K", "L"],
}
)
font.kerning.update(
{
("public.kern1.foo$", "@public.kern2.bar"): 10,
("public.kern1.foo@", "public.kern2.bar&"): -10,
}
)
side1Classes, side2Classes = KernFeatureWriter.getKerningClasses(font)
assert side1Classes["public.kern1.foo$"].name == "kern1.foo"
assert side1Classes["public.kern1.foo@"].name == "kern1.foo_1"
# no valid 'public.kern{1,2}.' prefix, skipped
assert "@public.kern2.bar" not in side2Classes
assert side2Classes["public.kern2.bar&"].name == "kern2.bar"
def test_getKerningPairs(self, FontClass):
font = FontClass()
for i in range(65, 65 + 8): # A..H
font.newGlyph(chr(i))
font.groups.update({
"public.kern1.foo": ["A", "B"],
"public.kern2.bar": ["C", "D"],
"public.kern1.baz": ["E", "F"],
"public.kern2.nul": ["G", "H"],
})
font.kerning.update({
("public.kern1.foo", "public.kern2.bar"):
10,
("public.kern1.baz", "public.kern2.bar"):
-10,
("public.kern1.foo", "D"):
15,
("A", "public.kern2.bar"):
5,
("G", "H"):
-5,
# class-class zero-value pairs are skipped
("public.kern1.foo", "public.kern2.nul"):
0,
})
s1c, s2c = KernFeatureWriter.getKerningClasses(font)
pairs = KernFeatureWriter.getKerningPairs(font, s1c, s2c)
assert len(pairs) == 5
assert "G H -5" in repr(pairs[0])
assert (pairs[0].firstIsClass, pairs[0].secondIsClass) == (False,
False)
assert pairs[0].glyphs == {"G", "H"}
assert "A @kern2.bar 5" in repr(pairs[1])
assert (pairs[1].firstIsClass, pairs[1].secondIsClass) == (False, True)
assert pairs[1].glyphs == {"A", "C", "D"}
assert "@kern1.foo D 15" in repr(pairs[2])
assert (pairs[2].firstIsClass, pairs[2].secondIsClass) == (True, False)
assert pairs[2].glyphs == {"A", "B", "D"}
assert "@kern1.baz @kern2.bar -10" in repr(pairs[3])
assert (pairs[3].firstIsClass, pairs[3].secondIsClass) == (True, True)
assert pairs[3].glyphs == {"C", "D", "E", "F"}
assert "@kern1.foo @kern2.bar 10" in repr(pairs[4])
assert (pairs[4].firstIsClass, pairs[4].secondIsClass) == (True, True)
assert pairs[4].glyphs == {"A", "B", "C", "D"}