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Searching: Fix searching by date not using the system locale to interpret dd/mm vs mm/dd dates

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This commit is contained in:
Kovid Goyal 2014-04-12 14:04:47 +05:30
parent cd7da5743e
commit e09a6c7e63
1 changed files with 30 additions and 13 deletions
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43
src/calibre/utils/date.py
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@ -13,6 +13,7 @@ from functools import partial
from dateutil.tz import tzlocal, tzutc, EPOCHORDINAL from dateutil.tz import tzlocal, tzutc, EPOCHORDINAL
from calibre import strftime from calibre import strftime
from calibre.constants import iswindows
from calibre.utils.localization import lcdata from calibre.utils.localization import lcdata
class SafeLocalTimeZone(tzlocal): class SafeLocalTimeZone(tzlocal):
@ -52,22 +53,38 @@ class SafeLocalTimeZone(tzlocal):
pass pass
return False return False
def compute_locale_info_for_parse_date():
try:
dt = datetime.strptime('1/5/2000', "%x")
except:
try:
dt = datetime.strptime('1/5/01', '%x')
except:
return False
if dt.month == 5:
return True
return False
parse_date_day_first = compute_locale_info_for_parse_date()
utc_tz = _utc_tz = tzutc() utc_tz = _utc_tz = tzutc()
local_tz = _local_tz = SafeLocalTimeZone() local_tz = _local_tz = SafeLocalTimeZone()
# When parsing ambiguous dates that could be either dd-MM Or MM-dd use the
# user's locale preferences
if iswindows:
import ctypes
LOCALE_SSHORTDATE, LOCALE_USER_DEFAULT = 0x1f, 0
buf = ctypes.create_string_buffer(b'\0', 255)
try:
ctypes.windll.kernel32.GetLocaleInfoA(LOCALE_USER_DEFAULT, LOCALE_SSHORTDATE, buf, 255)
parse_date_day_first = buf.value.index(b'd') < buf.value.index(b'M')
except:
parse_date_day_first = False
del ctypes, LOCALE_SSHORTDATE, buf, LOCALE_USER_DEFAULT
else:
try:
def first_index(raw, queries):
for q in queries:
try:
return raw.index(q)
except ValueError:
pass
return -1
import locale
raw = locale.nl_langinfo(locale.D_FMT)
parse_date_day_first = first_index(raw, ('%d', '%a', '%A')) < first_index(raw, ('%m', '%b', '%B'))
del raw, first_index
except:
parse_date_day_first = False
UNDEFINED_DATE = datetime(101,1,1, tzinfo=utc_tz) UNDEFINED_DATE = datetime(101,1,1, tzinfo=utc_tz)
DEFAULT_DATE = datetime(2000,1,1, tzinfo=utc_tz) DEFAULT_DATE = datetime(2000,1,1, tzinfo=utc_tz)
EPOCH = datetime(1970, 1, 1, tzinfo=_utc_tz) EPOCH = datetime(1970, 1, 1, tzinfo=_utc_tz)