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Merge pull request #18 from mithro/lint-cleanup
Lint cleanup.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,88 +1,124 @@ | ||
| __author__ = 'davidm' | ||
| # -*- coding: utf-8 -*- | ||
| # vim: set ts=2 sw=2 et sts=2 ai: | ||
| # | ||
| # Copyright 2014 David M | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
| # | ||
| # pylint: disable=invalid-name,protected-access | ||
|
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| """datetime_tz windows support.""" | ||
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| __author__ = "davidm" | ||
|
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| import ctypes | ||
| import pytz | ||
| import warnings | ||
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| import pytz | ||
|
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| try: | ||
| from datetime_tz import win32tz_map | ||
| # pylint: disable=g-import-not-at-top | ||
| from datetime_tz import win32tz_map | ||
| except ImportError: | ||
| warnings.warn("win32tz_map is not generated yet - hopefully this only happens in a build") | ||
| warnings.warn("win32tz_map has not been generated yet.") | ||
|
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| try: | ||
| import win32timezone | ||
| # pylint: disable=g-import-not-at-top | ||
| import win32timezone | ||
| except ImportError: | ||
| win32timezone = None | ||
| win32timezone = None | ||
|
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| # The following code is a workaround to | ||
| # GetDynamicTimeZoneInformation not being present in win32timezone | ||
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| class SYSTEMTIME_c(ctypes.Structure): | ||
| """ctypes structure for SYSTEMTIME""" | ||
| # pylint: disable=too-few-public-methods | ||
| _fields_ = [ | ||
| ('year', ctypes.c_ushort), | ||
| ('month', ctypes.c_ushort), | ||
| ('day_of_week', ctypes.c_ushort), | ||
| ('day', ctypes.c_ushort), | ||
| ('hour', ctypes.c_ushort), | ||
| ('minute', ctypes.c_ushort), | ||
| ('second', ctypes.c_ushort), | ||
| ('millisecond', ctypes.c_ushort), | ||
| ] | ||
| """ctypes structure for SYSTEMTIME.""" | ||
| # pylint: disable=too-few-public-methods | ||
| _fields_ = [ | ||
| ("year", ctypes.c_ushort), | ||
| ("month", ctypes.c_ushort), | ||
| ("day_of_week", ctypes.c_ushort), | ||
| ("day", ctypes.c_ushort), | ||
| ("hour", ctypes.c_ushort), | ||
| ("minute", ctypes.c_ushort), | ||
| ("second", ctypes.c_ushort), | ||
| ("millisecond", ctypes.c_ushort), | ||
| ] | ||
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| class TZI_c(ctypes.Structure): | ||
| """ctypes structure for TIME_ZONE_INFORMATION""" | ||
| # pylint: disable=too-few-public-methods | ||
| _fields_ = [ | ||
| ('bias', ctypes.c_long), | ||
| ('standard_name', ctypes.c_wchar*32), | ||
| ('standard_start', SYSTEMTIME_c), | ||
| ('standard_bias', ctypes.c_long), | ||
| ('daylight_name', ctypes.c_wchar*32), | ||
| ('daylight_start', SYSTEMTIME_c), | ||
| ('daylight_bias', ctypes.c_long), | ||
| ] | ||
| """ctypes structure for TIME_ZONE_INFORMATION.""" | ||
| # pylint: disable=too-few-public-methods | ||
| _fields_ = [ | ||
| ("bias", ctypes.c_long), | ||
| ("standard_name", ctypes.c_wchar*32), | ||
| ("standard_start", SYSTEMTIME_c), | ||
| ("standard_bias", ctypes.c_long), | ||
| ("daylight_name", ctypes.c_wchar*32), | ||
| ("daylight_start", SYSTEMTIME_c), | ||
| ("daylight_bias", ctypes.c_long), | ||
| ] | ||
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| class DTZI_c(ctypes.Structure): | ||
| """ctypes structure for DYNAMIC_TIME_ZONE_INFORMATION""" | ||
| # pylint: disable=too-few-public-methods | ||
| _fields_ = TZI_c._fields_ + [ | ||
| ('key_name', ctypes.c_wchar*128), | ||
| ('dynamic_daylight_time_disabled', ctypes.c_bool), | ||
| ] | ||
| """ctypes structure for DYNAMIC_TIME_ZONE_INFORMATION.""" | ||
| # pylint: disable=too-few-public-methods | ||
| _fields_ = TZI_c._fields_ + [ | ||
| ("key_name", ctypes.c_wchar*128), | ||
| ("dynamic_daylight_time_disabled", ctypes.c_bool), | ||
| ] | ||
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| # Global variable for mapping Window timezone names in the current | ||
| # locale to english ones. Initialized when needed | ||
| win32timezone_to_en = {} | ||
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| def _detect_timezone_windows(): | ||
| # pylint: disable=global-statement | ||
| global win32timezone_to_en | ||
|
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| # Try and fetch the key_name for the timezone using Get(Dynamic)TimeZoneInformation | ||
| tzi = DTZI_c() | ||
| kernel32 = ctypes.windll.kernel32 | ||
| getter = kernel32.GetTimeZoneInformation | ||
| getter = getattr(kernel32, 'GetDynamicTimeZoneInformation', getter) | ||
| # code is for daylight savings: 0 means disabled/not defined, 1 means enabled but inactive, 2 means enabled and active | ||
| code = getter(ctypes.byref(tzi)) | ||
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| win32tz_key_name = tzi.key_name | ||
| if not win32tz_key_name: | ||
| if win32timezone is None: | ||
| return None | ||
| # we're on Windows before Vista/Server 2008 - need to look up the standard_name in the registry | ||
| # This will not work in some multilingual setups if running in a language | ||
| # other than the operating system default | ||
| win32tz_name = tzi.standard_name | ||
| if not win32timezone_to_en: | ||
| win32timezone_to_en = dict(win32timezone.TimeZoneInfo._get_indexed_time_zone_keys("Std")) | ||
| win32tz_key_name = win32timezone_to_en.get(win32tz_name, win32tz_name) | ||
| olson_name = win32tz_map.win32timezones.get(win32tz_key_name, None) | ||
| if not olson_name: | ||
| return None | ||
| if not isinstance(olson_name, str): | ||
| olson_name = olson_name.encode('ascii') | ||
| return pytz.timezone(olson_name) | ||
| """Detect timezone on the windows platform.""" | ||
| # pylint: disable=global-statement | ||
| global win32timezone_to_en | ||
|
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| # Try and fetch the key_name for the timezone using | ||
| # Get(Dynamic)TimeZoneInformation | ||
| tzi = DTZI_c() | ||
| kernel32 = ctypes.windll.kernel32 | ||
| getter = kernel32.GetTimeZoneInformation | ||
| getter = getattr(kernel32, "GetDynamicTimeZoneInformation", getter) | ||
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| # code is for daylight savings: 0 means disabled/not defined, 1 means enabled | ||
| # but inactive, 2 means enabled and active | ||
| _ = getter(ctypes.byref(tzi)) | ||
|
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| win32tz_key_name = tzi.key_name | ||
| if not win32tz_key_name: | ||
| if win32timezone is None: | ||
| return None | ||
| # We're on Windows before Vista/Server 2008 - need to look up the | ||
| # standard_name in the registry. | ||
| # This will not work in some multilingual setups if running in a language | ||
| # other than the operating system default | ||
| win32tz_name = tzi.standard_name | ||
| if not win32timezone_to_en: | ||
| win32timezone_to_en = dict( | ||
| win32timezone.TimeZoneInfo._get_indexed_time_zone_keys("Std")) | ||
| win32tz_key_name = win32timezone_to_en.get(win32tz_name, win32tz_name) | ||
|
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| olson_name = win32tz_map.win32timezones.get(win32tz_key_name, None) | ||
| if not olson_name: | ||
| return None | ||
| if not isinstance(olson_name, str): | ||
| olson_name = olson_name.encode("ascii") | ||
|
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| return pytz.timezone(olson_name) |
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