openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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import os
import json
import gettext
from openpilot.common.params import Params
from openpilot.common.basedir import BASEDIR
UI_DIR = os.path.join(BASEDIR, "selfdrive", "ui")
TRANSLATIONS_DIR = os.path.join(UI_DIR, "translations")
LANGUAGES_FILE = os.path.join(TRANSLATIONS_DIR, "languages.json")
class Multilang:
def __init__(self):
self._params = Params()
self.languages = {}
self.codes = {}
self._translation: gettext.NullTranslations | gettext.GNUTranslations | None = None
self._load_languages()
@property
def language(self) -> str:
return self._params.get("LanguageSetting") or "en"
def setup(self):
language = self.language
try:
with open(os.path.join(TRANSLATIONS_DIR, f'app_{language}.mo'), 'rb') as fh:
translation = gettext.GNUTranslations(fh)
translation.install()
self._translation = translation
print(f"Loaded translations for language: {language}")
except FileNotFoundError:
print(f"No translation file found for language: {language}, using default.")
gettext.install('app')
self._translation = gettext.NullTranslations()
return None
def change_language(self, language_code: str) -> None:
# Persist selection
if self._params.get("LanguageSetting") != language_code:
self._params.put("LanguageSetting", language_code)
# Reinstall gettext with the selected language
self.setup()
def tr(self, text: str) -> str:
if self._translation is None:
self.setup()
return self._translation.gettext(text)
def trn(self, singular: str, plural: str, n: int) -> str:
if self._translation is None:
self.setup()
return self._translation.ngettext(singular, plural, n)
def _load_languages(self):
with open(LANGUAGES_FILE, encoding='utf-8') as f:
self.languages = json.load(f)
self.codes = {v: k for k, v in self.languages.items()}
multilang = Multilang()
multilang.setup()
def tr(text: str) -> str:
return multilang.tr(text)
def trn(singular: str, plural: str, n: int) -> str:
return multilang.trn(singular, plural, n)