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[unicodedata] map Zmth<->math in ot_tag_{to,from}_script

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Fixes https://github.com/fonttools/fonttools/issues/1737
This commit is contained in:
Cosimo Lupo 2022-11-11 12:20:37 +00:00
parent ded595f03c
commit 8697f91cdc
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GPG Key ID: DF65A8A5A119C9A8
3 changed files with 14 additions and 6 deletions
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5
Lib/fontTools/unicodedata/OTTags.py
View File

@ -22,11 +22,16 @@ SCRIPT_EXCEPTIONS = {
"Yiii": "yi ",
"Nkoo": "nko ",
"Vaii": "vai ",
"Zmth": "math",
"Zinh": DEFAULT_SCRIPT,
"Zyyy": DEFAULT_SCRIPT,
"Zzzz": DEFAULT_SCRIPT,
}
SCRIPT_EXCEPTIONS_REVERSED = {
"math": "Zmth",
}
NEW_SCRIPT_TAGS = {
"Beng": ("bng2",),
"Deva": ("dev2",),

13
Lib/fontTools/unicodedata/__init__.py
View File

@ -239,15 +239,13 @@ def ot_tags_from_script(script_code):
Unicode script code.
Return ['DFLT'] script tag for invalid/unknown script codes.
"""
if script_code in OTTags.SCRIPT_EXCEPTIONS:
return [OTTags.SCRIPT_EXCEPTIONS[script_code]]
if script_code not in Scripts.NAMES:
return [OTTags.DEFAULT_SCRIPT]
script_tags = [
OTTags.SCRIPT_EXCEPTIONS.get(
script_code,
script_code[0].lower() + script_code[1:]
)
]
script_tags = [script_code[0].lower() + script_code[1:]]
if script_code in OTTags.NEW_SCRIPT_TAGS:
script_tags.extend(OTTags.NEW_SCRIPT_TAGS[script_code])
script_tags.reverse() # last in, first out
@ -278,6 +276,9 @@ def ot_tag_to_script(tag):
if tag in OTTags.NEW_SCRIPT_TAGS_REVERSED:
return OTTags.NEW_SCRIPT_TAGS_REVERSED[tag]
if tag in OTTags.SCRIPT_EXCEPTIONS_REVERSED:
return OTTags.SCRIPT_EXCEPTIONS_REVERSED[tag]
# This side of the conversion is fully algorithmic
# Any spaces at the end of the tag are replaced by repeating the last

2
Tests/unicodedata_test.py
View File

@ -210,6 +210,7 @@ def test_ot_tags_from_script():
assert unicodedata.ot_tags_from_script("Deva") == ["dev2", "deva"]
# exceptions
assert unicodedata.ot_tags_from_script("Hira") == ["kana"]
assert unicodedata.ot_tags_from_script("Zmth") == ["math"]
# special script codes map to DFLT
assert unicodedata.ot_tags_from_script("Zinh") == ["DFLT"]
assert unicodedata.ot_tags_from_script("Zyyy") == ["DFLT"]
@ -232,6 +233,7 @@ def test_ot_tag_to_script():
assert unicodedata.ot_tag_to_script("vai ") == "Vaii"
assert unicodedata.ot_tag_to_script("lao ") == "Laoo"
assert unicodedata.ot_tag_to_script("yi") == "Yiii"
assert unicodedata.ot_tag_to_script("math") == "Zmth"
# both 'hang' and 'jamo' tags map to the Hangul script
assert unicodedata.ot_tag_to_script("hang") == "Hang"
assert unicodedata.ot_tag_to_script("jamo") == "Hang"