1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import gettext
import pkg_resources
from babel import localedata
from babel.support import LazyProxy
from mediagoblin import mg_globals
###################
# Translation tools
###################
AVAILABLE_LOCALES = None
TRANSLATIONS_PATH = pkg_resources.resource_filename(
'mediagoblin', 'i18n')
# Known RTL languages
KNOWN_RTL = {"ar", "fa", "he", "iw", "ur", "yi", "ji"}
def is_rtl(lang):
"""Returns true when the local language is right to left"""
return lang in KNOWN_RTL
def set_available_locales():
"""Set available locales for which we have translations"""
global AVAILABLE_LOCALES
locales=['en', 'en_US'] # these are available without translations
for locale in localedata.locale_identifiers():
if gettext.find('mediagoblin', TRANSLATIONS_PATH, [locale]):
locales.append(locale)
AVAILABLE_LOCALES = locales
class ReallyLazyProxy(LazyProxy):
"""
Like LazyProxy, except that it doesn't cache the value ;)
"""
def __init__(self, func, *args, **kwargs):
super().__init__(func, *args, **kwargs)
object.__setattr__(self, '_is_cache_enabled', False)
def __repr__(self):
return "<{} for {}({!r}, {!r})>".format(
self.__class__.__name__,
self._func,
self._args,
self._kwargs)
def locale_to_lower_upper(locale):
"""
Take a locale, regardless of style, and format it like "en_US"
"""
if '-' in locale:
lang, country = locale.split('-', 1)
return f'{lang.lower()}_{country.upper()}'
elif '_' in locale:
lang, country = locale.split('_', 1)
return f'{lang.lower()}_{country.upper()}'
else:
return locale.lower()
def locale_to_lower_lower(locale):
"""
Take a locale, regardless of style, and format it like "en_us"
"""
if '_' in locale:
lang, country = locale.split('_', 1)
return f'{lang.lower()}-{country.lower()}'
else:
return locale.lower()
def get_locale_from_request(request):
"""
Return most appropriate language based on prefs/request request
"""
request_args = (request.args, request.form)[request.method=='POST']
if 'lang' in request_args:
# User explicitely demanded a language, normalize lower_uppercase
target_lang = locale_to_lower_upper(request_args['lang'])
elif 'target_lang' in request.session:
# TODO: Uh, ohh, this is never ever set anywhere?
target_lang = request.session['target_lang']
else:
# Pull the most acceptable language based on browser preferences
# This returns one of AVAILABLE_LOCALES which is aready case-normalized.
# Note: in our tests request.accept_languages is None, so we need
# to explicitely fallback to en here.
target_lang = request.accept_languages.best_match(AVAILABLE_LOCALES) \
or "en_US"
return target_lang
SETUP_GETTEXTS = {}
def get_gettext_translation(locale):
"""
Return the gettext instance based on this locale
"""
# Later on when we have plugins we may want to enable the
# multi-translations system they have so we can handle plugin
# translations too
# TODO: fallback nicely on translations from pt_PT to pt if not
# available, etc.
if locale in SETUP_GETTEXTS:
this_gettext = SETUP_GETTEXTS[locale]
else:
this_gettext = gettext.translation(
'mediagoblin', TRANSLATIONS_PATH, [locale], fallback=True)
if localedata.exists(locale):
SETUP_GETTEXTS[locale] = this_gettext
return this_gettext
def set_thread_locale(locale):
"""Set the current translation for this thread"""
mg_globals.thread_scope.translations = get_gettext_translation(locale)
def pass_to_ugettext(*args, **kwargs):
"""
Pass a translation on to the appropriate ugettext method.
The reason we can't have a global ugettext method is because
mg_globals gets swapped out by the application per-request.
"""
return mg_globals.thread_scope.translations.gettext(*args, **kwargs)
def pass_to_ungettext(*args, **kwargs):
"""
Pass a translation on to the appropriate ungettext method.
The reason we can't have a global ugettext method is because
mg_globals gets swapped out by the application per-request.
"""
return mg_globals.thread_scope.translations.ngettext(*args, **kwargs)
def lazy_pass_to_ugettext(*args, **kwargs):
"""
Lazily pass to ugettext.
This is useful if you have to define a translation on a module
level but you need it to not translate until the time that it's
used as a string. For example, in:
def func(self, message=_('Hello boys and girls'))
you would want to use the lazy version for _.
"""
return ReallyLazyProxy(pass_to_ugettext, *args, **kwargs)
def pass_to_ngettext(*args, **kwargs):
"""
Pass a translation on to the appropriate ngettext method.
The reason we can't have a global ngettext method is because
mg_globals gets swapped out by the application per-request.
"""
return mg_globals.thread_scope.translations.ngettext(
*args, **kwargs)
def lazy_pass_to_ngettext(*args, **kwargs):
"""
Lazily pass to ngettext.
This is useful if you have to define a translation on a module
level but you need it to not translate until the time that it's
used as a string.
"""
return ReallyLazyProxy(pass_to_ngettext, *args, **kwargs)
def lazy_pass_to_ungettext(*args, **kwargs):
"""
Lazily pass to ungettext.
This is useful if you have to define a translation on a module
level but you need it to not translate until the time that it's
used as a string.
"""
return ReallyLazyProxy(pass_to_ungettext, *args, **kwargs)
def fake_ugettext_passthrough(string):
"""
Fake a ugettext call for extraction's sake ;)
In wtforms there's a separate way to define a method to translate
things... so we just need to mark up the text so that it can be
extracted, not so that it's actually run through gettext.
"""
return string
|
