def test_ensureDecompiled(lazy):
# test that no matter the lazy value, ensureDecompiled decompiles all tables
font = TTFont()
font.importXML(os.path.join(DATA_DIR, "TestTTF-Regular.ttx"))
# test font has no OTL so we add some, as an example of otData-driven tables
addOpenTypeFeaturesFromString(
font,
"""
feature calt {
sub period' period' period' space by ellipsis;
} calt;
feature dist {
pos period period -30;
} dist;
"""
)
# also add an additional cmap subtable that will be lazily-loaded
cm = CmapSubtable.newSubtable(14)
cm.platformID = 0
cm.platEncID = 5
cm.language = 0
cm.cmap = {}
cm.uvsDict = {0xFE00: [(0x002e, None)]}
font["cmap"].tables.append(cm)
# save and reload, potentially lazily
buf = io.BytesIO()
font.save(buf)
buf.seek(0)
font = TTFont(buf, lazy=lazy)
# check no table is loaded until/unless requested, no matter the laziness
for tag in font.keys():
assert not font.isLoaded(tag)
if lazy is not False:
# additional cmap doesn't get decompiled automatically unless lazy=False;
# can't use hasattr or else cmap's maginc __getattr__ kicks in...
cm = next(st for st in font["cmap"].tables if st.__dict__["format"] == 14)
assert cm.data is not None
assert "uvsDict" not in cm.__dict__
# glyf glyphs are not expanded unless lazy=False
assert font["glyf"].glyphs["period"].data is not None
assert not hasattr(font["glyf"].glyphs["period"], "coordinates")
if lazy is True:
# OTL tables hold a 'reader' to lazily load when lazy=True
assert "reader" in font["GSUB"].table.LookupList.__dict__
assert "reader" in font["GPOS"].table.LookupList.__dict__
font.ensureDecompiled()
# all tables are decompiled now
for tag in font.keys():
assert font.isLoaded(tag)
# including the additional cmap
cm = next(st for st in font["cmap"].tables if st.__dict__["format"] == 14)
assert cm.data is None
assert "uvsDict" in cm.__dict__
# expanded glyf glyphs lost the 'data' attribute
assert not hasattr(font["glyf"].glyphs["period"], "data")
assert hasattr(font["glyf"].glyphs["period"], "coordinates")
# and OTL tables have read their 'reader'
assert "reader" not in font["GSUB"].table.LookupList.__dict__
assert "Lookup" in font["GSUB"].table.LookupList.__dict__
assert "reader" not in font["GPOS"].table.LookupList.__dict__
assert "Lookup" in font["GPOS"].table.LookupList.__dict__
