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"""Utilities for LaTeX builder."""
from __future__ import annotations
from docutils.writers.latex2e import Babel
class ExtBabel(Babel):
cyrillic_languages = ('bulgarian', 'kazakh', 'mongolian', 'russian', 'ukrainian')
def __init__(self, language_code: str, use_polyglossia: bool = False) -> None:
self.language_code = language_code
self.use_polyglossia = use_polyglossia
self.supported = True
super().__init__(language_code)
def uses_cyrillic(self) -> bool:
return self.language in self.cyrillic_languages
def is_supported_language(self) -> bool:
return self.supported
def language_name(self, language_code: str) -> str:
language = super().language_name(language_code)
if language == 'ngerman' and self.use_polyglossia:
# polyglossia calls new orthography (Neue Rechtschreibung) as
# german (with new spelling option).
return 'german'
elif language:
return language
elif language_code.startswith('zh'):
return 'english' # fallback to english (behaves like supported)
else:
self.supported = False
return 'english' # fallback to english
def get_mainlanguage_options(self) -> str | None:
"""Return options for polyglossia's ``\\setmainlanguage``."""
if self.use_polyglossia is False:
return None
elif self.language == 'german':
language = super().language_name(self.language_code)
if language == 'ngerman':
return 'spelling=new'
else:
return 'spelling=old'
else:
return None
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