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from fontTools.misc.loggingTools import CapturingLogHandler
from fontTools.misc.textTools import tobytes
from fontTools.ttLib import TTFont, TTLibError
from fontTools.ttLib.tables.T_S_I__0 import table_T_S_I__0
from fontTools.ttLib.tables.T_S_I__1 import table_T_S_I__1
import pytest
TSI1_DATA = b"""abcdefghijklmnopqrstuvxywz0123456789"""
TSI1_UTF8_DATA = b"""abcd\xc3\xa9ghijklmnopqrstuvxywz0123456789"""
@pytest.fixture
def indextable():
table = table_T_S_I__0()
table.set(
[(0, 1, 0), # gid 0, length=1, offset=0, text='a'
(1, 5, 1), # gid 1, length=5, offset=1, text='bcdef'
(2, 0, 1), # gid 2, length=0, offset=1, text=''
(3, 0, 1), # gid 3, length=0, offset=1, text=''
(4, 8, 6)], # gid 4, length=8, offset=6, text='ghijklmn'
[(0xFFFA, 2, 14), # 'ppgm', length=2, offset=14, text='op'
(0xFFFB, 4, 16), # 'cvt', length=4, offset=16, text='qrst'
(0xFFFC, 6, 20), # 'reserved', length=6, offset=20, text='uvxywz'
(0xFFFD, 10, 26)] # 'fpgm', length=10, offset=26, text='0123456789'
)
return table
@pytest.fixture
def font(indextable):
font = TTFont()
# ['a', 'b', 'c', ...]
ch = 0x61
n = len(indextable.indices)
font.glyphOrder = [chr(i) for i in range(ch, ch+n)]
font['TSI0'] = indextable
return font
@pytest.fixture
def empty_font():
font = TTFont()
font.glyphOrder = []
indextable = table_T_S_I__0()
indextable.set([], [(0xFFFA, 0, 0),
(0xFFFB, 0, 0),
(0xFFFC, 0, 0),
(0xFFFD, 0, 0)])
font['TSI0'] = indextable
return font
def test_decompile(font):
table = table_T_S_I__1()
table.decompile(TSI1_DATA, font)
assert table.glyphPrograms == {
'a': 'a',
'b': 'bcdef',
# 'c': '', # zero-length entries are skipped
# 'd': '',
'e': 'ghijklmn'}
assert table.extraPrograms == {
'ppgm': 'op',
'cvt': 'qrst',
'reserved': 'uvxywz',
'fpgm': '0123456789'}
def test_decompile_utf8(font):
table = table_T_S_I__1()
table.decompile(TSI1_UTF8_DATA, font)
assert table.glyphPrograms == {
'a': 'a',
'b': 'bcd\u00e9',
# 'c': '', # zero-length entries are skipped
# 'd': '',
'e': 'ghijklmn'}
assert table.extraPrograms == {
'ppgm': 'op',
'cvt': 'qrst',
'reserved': 'uvxywz',
'fpgm': '0123456789'}
def test_decompile_empty(empty_font):
table = table_T_S_I__1()
table.decompile(b"", empty_font)
assert table.glyphPrograms == {}
assert table.extraPrograms == {}
def test_decompile_invalid_length(empty_font):
empty_font.glyphOrder = ['a']
empty_font['TSI0'].indices = [(0, 0x8000+1, 0)]
table = table_T_S_I__1()
with pytest.raises(TTLibError) as excinfo:
table.decompile(b'', empty_font)
assert excinfo.match("textLength .* must not be > 32768")
def test_decompile_offset_past_end(empty_font):
empty_font.glyphOrder = ['foo', 'bar']
content = 'baz'
data = tobytes(content)
empty_font['TSI0'].indices = [(0, len(data), 0), (1, 1, len(data)+1)]
table = table_T_S_I__1()
with CapturingLogHandler(table.log, "WARNING") as captor:
table.decompile(data, empty_font)
# the 'bar' program is skipped because its offset > len(data)
assert table.glyphPrograms == {'foo': 'baz'}
assert any("textOffset > totalLength" in r.msg for r in captor.records)
def test_decompile_magic_length_last_extra(empty_font):
indextable = empty_font['TSI0']
indextable.extra_indices[-1] = (0xFFFD, 0x8000, 0)
content = "0" * (0x8000 + 1)
data = tobytes(content)
table = table_T_S_I__1()
table.decompile(data, empty_font)
assert table.extraPrograms['fpgm'] == content
def test_decompile_magic_length_last_glyph(empty_font):
empty_font.glyphOrder = ['foo', 'bar']
indextable = empty_font['TSI0']
indextable.indices = [
(0, 3, 0),
(1, 0x8000, 3)] # the actual length of 'bar' program is
indextable.extra_indices = [ # the difference between the first extra's
(0xFFFA, 0, 0x8004), # offset and 'bar' offset: 0x8004 - 3
(0xFFFB, 0, 0x8004),
(0xFFFC, 0, 0x8004),
(0xFFFD, 0, 0x8004)]
foo_content = "0" * 3
bar_content = "1" * (0x8000 + 1)
data = tobytes(foo_content + bar_content)
table = table_T_S_I__1()
table.decompile(data, empty_font)
assert table.glyphPrograms['foo'] == foo_content
assert table.glyphPrograms['bar'] == bar_content
def test_decompile_magic_length_non_last(empty_font):
indextable = empty_font['TSI0']
indextable.extra_indices = [
(0xFFFA, 3, 0),
(0xFFFB, 0x8000, 3), # the actual length of 'cvt' program is:
(0xFFFC, 0, 0x8004), # nextTextOffset - textOffset: 0x8004 - 3
(0xFFFD, 0, 0x8004)]
ppgm_content = "0" * 3
cvt_content = "1" * (0x8000 + 1)
data = tobytes(ppgm_content + cvt_content)
table = table_T_S_I__1()
table.decompile(data, empty_font)
assert table.extraPrograms['ppgm'] == ppgm_content
assert table.extraPrograms['cvt'] == cvt_content
table = table_T_S_I__1()
with CapturingLogHandler(table.log, "WARNING") as captor:
table.decompile(data[:-1], empty_font) # last entry is truncated
captor.assertRegex("nextTextOffset > totalLength")
assert table.extraPrograms['cvt'] == cvt_content[:-1]
if __name__ == "__main__":
import sys
sys.exit(pytest.main(sys.argv))
|
