71 lines
2.5 KiB
Python
71 lines
2.5 KiB
Python
|
from functools import wraps
|
||
|
|
|
||
|
|
|
||
|
|
def _restore_languages_on_generator_exit(method):
|
||
|
|
@wraps(method)
|
||
|
|
def wrapped(self, *args, **kwargs):
|
||
|
|
stored_languages = self.languages[:]
|
||
|
|
for language in method(self, *args, **kwargs):
|
||
|
|
yield language
|
||
|
|
else:
|
||
|
|
self.languages[:] = stored_languages
|
||
|
|
|
||
|
|
return wrapped
|
||
|
|
|
||
|
|
|
||
|
|
class BaseLanguageDetector:
|
||
|
|
def __init__(self, languages):
|
||
|
|
self.languages = languages[:]
|
||
|
|
|
||
|
|
@_restore_languages_on_generator_exit
|
||
|
|
def iterate_applicable_languages(self, date_string, settings=None, modify=False):
|
||
|
|
languages = self.languages if modify else self.languages[:]
|
||
|
|
yield from self._filter_languages(date_string, languages, settings)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def _filter_languages(date_string, languages, settings=None):
|
||
|
|
while languages:
|
||
|
|
language = languages[0]
|
||
|
|
if language.is_applicable(date_string, strip_timezone=False, settings=settings):
|
||
|
|
yield language
|
||
|
|
elif language.is_applicable(date_string, strip_timezone=True, settings=settings):
|
||
|
|
yield language
|
||
|
|
|
||
|
|
languages.pop(0)
|
||
|
|
|
||
|
|
|
||
|
|
class AutoDetectLanguage(BaseLanguageDetector):
|
||
|
|
def __init__(self, languages, allow_redetection=False):
|
||
|
|
super().__init__(languages=languages[:])
|
||
|
|
self.language_pool = languages[:]
|
||
|
|
self.allow_redetection = allow_redetection
|
||
|
|
|
||
|
|
@_restore_languages_on_generator_exit
|
||
|
|
def iterate_applicable_languages(self, date_string, modify=False, settings=None):
|
||
|
|
languages = self.languages if modify else self.languages[:]
|
||
|
|
initial_languages = languages[:]
|
||
|
|
yield from self._filter_languages(date_string, languages, settings=settings)
|
||
|
|
|
||
|
|
if not self.allow_redetection:
|
||
|
|
return
|
||
|
|
|
||
|
|
# Try languages that was not tried before with this date_string
|
||
|
|
languages = [language
|
||
|
|
for language in self.language_pool
|
||
|
|
if language not in initial_languages]
|
||
|
|
if modify:
|
||
|
|
self.languages = languages
|
||
|
|
|
||
|
|
yield from self._filter_languages(date_string, languages, settings=settings)
|
||
|
|
|
||
|
|
|
||
|
|
class ExactLanguages(BaseLanguageDetector):
|
||
|
|
def __init__(self, languages):
|
||
|
|
if languages is None:
|
||
|
|
raise ValueError("language cannot be None for ExactLanguages")
|
||
|
|
super().__init__(languages=languages)
|
||
|
|
|
||
|
|
@_restore_languages_on_generator_exit
|
||
|
|
def iterate_applicable_languages(self, date_string, modify=False, settings=None):
|
||
|
|
yield from super().iterate_applicable_languages(date_string, modify=False, settings=settings)
|