112 lines
3.4 KiB
Python
112 lines
3.4 KiB
Python
#
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# Copyright (c) 2012 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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View extension for support of i18n content.
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"""
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from zope import interface, component
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from zope.app.pagetemplate import ViewPageTemplateFile
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from zope.app.session.interfaces import ISession
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from zope.cachedescriptors.property import Lazy
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from zope.i18n.interfaces import IUserPreferredLanguages
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from zope.i18n.negotiator import negotiator
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from cybertools.meta.interfaces import IOptions
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from loops.common import adapted
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packageId = 'loops.i18n.browser'
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i18n_macros = ViewPageTemplateFile('i18n_macros.pt')
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class LanguageInfo(object):
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def __init__(self, context, request, allowDefault=True):
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self.context = context
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self.request = request
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self.allowDefault = allowDefault
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@Lazy
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def loopsRoot(self):
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return self.context.getLoopsRoot()
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@Lazy
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def availableLanguages(self):
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return IOptions(self.loopsRoot).languages
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@Lazy
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def defaultLanguage(self):
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langs = self.availableLanguages
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return langs and langs[0] or None
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@Lazy
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def language(self):
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available = self.availableLanguages or ('en', 'de')
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if len(available) == 1:
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return available[0]
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lang = self.request.get('loops.language')
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if lang is not None and lang in available:
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return lang
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return (negotiator.getLanguage(available, self.request)
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or self.defaultLanguage)
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class I18NView(object):
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""" View mix-in class.
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"""
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@Lazy
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def languageInfo(self):
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return LanguageInfo(self.context, self.request)
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@Lazy
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def languageInfoForUpdate(self):
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return LanguageInfo(self.context, self.request, False)
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@Lazy
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def useI18NForEditing(self):
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return (self.languageInfo.availableLanguages
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and getattr(self.adapted, 'i18nAttributes', None))
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@Lazy
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def adapted(self):
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return adapted(self.context, self.languageInfo)
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def checkLanguage(self):
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session = ISession(self.request)[packageId]
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lang = session.get('language') or self.languageInfo.language
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if lang:
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self.setLanguage(lang)
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def setLanguage(self, lang=None):
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lang = lang or self.request.form.get('lang')
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if lang and lang in self.languageInfo.availableLanguages:
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upl = IUserPreferredLanguages(self.request)
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upl.setPreferredLanguages([lang])
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def switchLanguage(self):
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lang = self.request.form.get('loops.language')
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keep = self.request.form.get('keep')
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if keep:
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session = ISession(self.request)[packageId]
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session['language'] = lang
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self.setLanguage(lang)
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return self()
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