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annotate roundup/cgi/TranslationService.py @ 5429:daa19de102a2

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Python 3 preparation: make fallback SysCallError an actual exception class. The code defines a fallback version of SysCallError when import of OpenSSL.SSL. But in Python 3, defining it as None and then using in "except" statements results in: TypeError: catching classes that do not inherit from BaseException is not allowed
author Joseph Myers <jsm@polyomino.org.uk>
date Wed, 25 Jul 2018 09:56:22 +0000
parents 56c9bcdea47f
children 214f34e18678
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1 # TranslationService for Roundup templates
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2 #
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3 # This module is free software, you may redistribute it
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4 # and/or modify under the same terms as Python.
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5 #
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6 # This module provides National Language Support
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7 # for Roundup templating - much like roundup.i18n
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8 # module for Roundup command line interface.
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9 # The only difference is that translator objects
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10 # returned by get_translation() have one additional
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11 # method which is used by TAL engines:
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12 #
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13 # translate(domain, msgid, mapping, context, target_language, default)
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14 #
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15
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16 from roundup import i18n
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17 from roundup.cgi.PageTemplates import Expressions, PathIterator, TALES
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18 from roundup.cgi.TAL import TALInterpreter
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19 from roundup.anypy.strings import us2u, u2s
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20
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21 ### Translation classes
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22
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23 class TranslationServiceMixin:
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24
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25 def translate(self, domain, msgid, mapping=None,
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26 context=None, target_language=None, default=None
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27 ):
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28 _msg = self.gettext(msgid)
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29 #print ("TRANSLATE", msgid, _msg, mapping, context)
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30 _msg = TALInterpreter.interpolate(_msg, mapping)
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31 return _msg
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32
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33 def gettext(self, msgid):
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34 msgid = us2u(msgid)
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35 msgtrans=self.ugettext(msgid)
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36 return u2s(msgtrans)
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37
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38 def ngettext(self, singular, plural, number):
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39 singular = us2u(singular)
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40 plural = us2u(plural)
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41 msgtrans=self.ungettext(singular, plural, number)
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42 return u2s(msgtrans)
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43
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44 class TranslationService(TranslationServiceMixin, i18n.RoundupTranslations):
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45 pass
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46
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47 class NullTranslationService(TranslationServiceMixin,
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48 i18n.RoundupNullTranslations):
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49 def ugettext(self, message):
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50 if self._fallback:
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51 return self._fallback.ugettext(message)
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52 # Sometimes the untranslatable message is a UTF-8 encoded string
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53 # (thanks to PageTemplate's internals).
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54 message = us2u(message)
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55 return message
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57 ### TAL patching
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58 #
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59 # Template Attribute Language (TAL) uses only global translation service,
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60 # which is not thread-safe. We will use context variable 'i18n'
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61 # to access request-dependent transalation service (with domain
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62 # and target language set during initializations of the roundup
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63 # client interface.
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64 #
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65
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66 class Context(TALES.Context):
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67
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68 def __init__(self, compiler, contexts):
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69 TALES.Context.__init__(self, compiler, contexts)
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70 if not self.contexts.get('i18n', None):
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71 # if the context contains no TranslationService,
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72 # create default one
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73 self.contexts['i18n'] = get_translation()
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74 self.i18n = self.contexts['i18n']
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75
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76 def translate(self, domain, msgid, mapping=None,
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77 context=None, target_language=None, default=None):
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78 if context is None:
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79 context = self.contexts.get('here')
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80 return self.i18n.translate(domain, msgid,
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81 mapping=mapping, context=context, default=default,
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82 target_language=target_language)
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83
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84 class Engine(TALES.Engine):
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85
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86 def getContext(self, contexts=None, **kwcontexts):
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87 if contexts is not None:
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88 if kwcontexts:
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89 kwcontexts.update(contexts)
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90 else:
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91 kwcontexts = contexts
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92 return Context(self, kwcontexts)
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93
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94 # patching TAL like this is a dirty hack,
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95 # but i see no other way to specify different Context class
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96 Expressions._engine = Engine(PathIterator.Iterator)
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97 Expressions.installHandlers(Expressions._engine)
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98
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99 ### main API function
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100
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101 def get_translation(language=None, tracker_home=None,
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102 translation_class=TranslationService,
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103 null_translation_class=NullTranslationService
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104 ):
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105 """Return Translation object for given language and domain
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106
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107 Arguments 'translation_class' and 'null_translation_class'
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108 specify the classes that are instantiated for existing
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109 and non-existing translations, respectively.
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110 """
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111 return i18n.get_translation(language=language,
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112 tracker_home=tracker_home,
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113 translation_class=translation_class,
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114 null_translation_class=null_translation_class)
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115
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116 # vim: set et sts=4 sw=4 :
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