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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 calibre import strftime
from calibre.constants import iswindows
from calibre.utils.localization import lcdata
class SafeLocalTimeZone(tzlocal):
@ -52,22 +53,38 @@ class SafeLocalTimeZone(tzlocal):
pass
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()
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)
DEFAULT_DATE = datetime(2000,1,1, tzinfo=utc_tz)
EPOCH = datetime(1970, 1, 1, tzinfo=_utc_tz)