mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-16 18:05:04 +00:00
138 lines
3.6 KiB
Python
138 lines
3.6 KiB
Python
"""
|
|
Functions to manage internationalisation (i18n):
|
|
- initLocale(): setup locales and install Unicode compatible stdout and
|
|
stderr ;
|
|
- getTerminalCharset(): guess terminal charset ;
|
|
|
|
WARNING: Loading this module indirectly calls initLocale() which sets
|
|
locale LC_ALL to ''. This is needed to get user preferred locale
|
|
settings.
|
|
"""
|
|
|
|
import locale
|
|
import sys
|
|
from codecs import BOM_UTF8, BOM_UTF16_LE, BOM_UTF16_BE
|
|
|
|
|
|
def _getTerminalCharset():
|
|
"""
|
|
Function used by getTerminalCharset() to get terminal charset.
|
|
|
|
@see getTerminalCharset()
|
|
"""
|
|
# (1) Try locale.getpreferredencoding()
|
|
try:
|
|
charset = locale.getpreferredencoding()
|
|
if charset:
|
|
return charset
|
|
except (locale.Error, AttributeError):
|
|
pass
|
|
|
|
# (2) Try locale.nl_langinfo(CODESET)
|
|
try:
|
|
charset = locale.nl_langinfo(locale.CODESET)
|
|
if charset:
|
|
return charset
|
|
except (locale.Error, AttributeError):
|
|
pass
|
|
|
|
# (3) Try sys.stdout.encoding
|
|
if hasattr(sys.stdout, "encoding") and sys.stdout.encoding:
|
|
return sys.stdout.encoding
|
|
|
|
# (4) Otherwise, returns "ASCII"
|
|
return "ASCII"
|
|
|
|
|
|
def getTerminalCharset():
|
|
"""
|
|
Guess terminal charset using differents tests:
|
|
1. Try locale.getpreferredencoding()
|
|
2. Try locale.nl_langinfo(CODESET)
|
|
3. Try sys.stdout.encoding
|
|
4. Otherwise, returns "ASCII"
|
|
|
|
WARNING: Call initLocale() before calling this function.
|
|
"""
|
|
try:
|
|
return getTerminalCharset.value
|
|
except AttributeError:
|
|
getTerminalCharset.value = _getTerminalCharset()
|
|
return getTerminalCharset.value
|
|
|
|
|
|
def initLocale():
|
|
# Only initialize locale once
|
|
if initLocale.is_done:
|
|
return
|
|
initLocale.is_done = True
|
|
|
|
# Setup locales
|
|
try:
|
|
locale.setlocale(locale.LC_ALL, "")
|
|
except (locale.Error, IOError):
|
|
pass
|
|
|
|
|
|
initLocale.is_done = False
|
|
|
|
UTF_BOMS = (
|
|
(BOM_UTF8, "UTF-8"),
|
|
(BOM_UTF16_LE, "UTF-16-LE"),
|
|
(BOM_UTF16_BE, "UTF-16-BE"),
|
|
)
|
|
|
|
# Set of valid characters for specific charset
|
|
CHARSET_CHARACTERS = (
|
|
# U+00E0: LATIN SMALL LETTER A WITH GRAVE
|
|
(set("©®éêè\xE0ç".encode("ISO-8859-1")), "ISO-8859-1"),
|
|
(set("©®éêè\xE0ç€".encode("ISO-8859-15")), "ISO-8859-15"),
|
|
(set("©®".encode("MacRoman")), "MacRoman"),
|
|
(set("εδηιθκμοΡσςυΈί".encode("ISO-8859-7")), "ISO-8859-7"),
|
|
)
|
|
|
|
|
|
def guessBytesCharset(data, default=None):
|
|
r"""
|
|
>>> guessBytesCharset(b"abc")
|
|
'ASCII'
|
|
>>> guessBytesCharset(b"\xEF\xBB\xBFabc")
|
|
'UTF-8'
|
|
>>> guessBytesCharset(b"abc\xC3\xA9")
|
|
'UTF-8'
|
|
>>> guessBytesCharset(b"File written by Adobe Photoshop\xA8 4.0\0")
|
|
'MacRoman'
|
|
>>> guessBytesCharset(b"\xE9l\xE9phant")
|
|
'ISO-8859-1'
|
|
>>> guessBytesCharset(b"100 \xA4")
|
|
'ISO-8859-15'
|
|
>>> guessBytesCharset(b'Word \xb8\xea\xe4\xef\xf3\xe7'
|
|
... b' - Microsoft Outlook 97'
|
|
... b' - \xd1\xf5\xe8\xec\xdf\xf3\xe5\xe9\xf2 e-mail')
|
|
'ISO-8859-7'
|
|
"""
|
|
# Check for UTF BOM
|
|
for bom_bytes, charset in UTF_BOMS:
|
|
if data.startswith(bom_bytes):
|
|
return charset
|
|
|
|
# Pure ASCII?
|
|
try:
|
|
data.decode('ascii', 'strict')
|
|
return 'ASCII'
|
|
except UnicodeDecodeError:
|
|
pass
|
|
|
|
# Valid UTF-8?
|
|
try:
|
|
data.decode('utf-8', 'strict')
|
|
return 'UTF-8'
|
|
except UnicodeDecodeError:
|
|
pass
|
|
|
|
# Create a set of non-ASCII characters
|
|
non_ascii_set = set(byte for byte in data if byte >= 128)
|
|
for characters, charset in CHARSET_CHARACTERS:
|
|
if characters.issuperset(non_ascii_set):
|
|
return charset
|
|
return default
|