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annotate roundup/cgi/TranslationService.py @ 5729:9ea2ce9d10cf

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A few internet references report that etags for the same underlying resource but with different representation (xml, json ...) should have different etags. That is currently not the case. Added code to allow incorporation of representation info into the etag. By default the representation is "json", but future patches can pass the representation down and modify flow to match requested representation.
author John Rouillard <rouilj@ieee.org>
date Sat, 25 May 2019 14:23:16 -0400
parents b0c2307be3d1
children 718f205dbe50
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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 if hasattr(i18n.RoundupTranslations, 'ugettext'):
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34 def gettext(self, msgid):
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35 msgid = us2u(msgid)
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36 msgtrans=self.ugettext(msgid)
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37 return u2s(msgtrans)
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38
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39 def ngettext(self, singular, plural, number):
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40 singular = us2u(singular)
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41 plural = us2u(plural)
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42 msgtrans=self.ungettext(singular, plural, number)
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43 return u2s(msgtrans)
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44
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45 class TranslationService(TranslationServiceMixin, i18n.RoundupTranslations):
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46 pass
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47
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48 class NullTranslationService(TranslationServiceMixin,
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49 i18n.RoundupNullTranslations):
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50 if hasattr(i18n.RoundupNullTranslations, 'ugettext'):
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51 def ugettext(self, message):
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52 if self._fallback:
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53 return self._fallback.ugettext(message)
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54 # Sometimes the untranslatable message is a UTF-8 encoded string
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55 # (thanks to PageTemplate's internals).
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56 message = us2u(message)
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57 return message
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58
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59 ### TAL patching
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60 #
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61 # Template Attribute Language (TAL) uses only global translation service,
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62 # which is not thread-safe. We will use context variable 'i18n'
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63 # to access request-dependent transalation service (with domain
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64 # and target language set during initializations of the roundup
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65 # client interface.
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66 #
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67
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68 class Context(TALES.Context):
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69
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70 def __init__(self, compiler, contexts):
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71 TALES.Context.__init__(self, compiler, contexts)
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72 if not self.contexts.get('i18n', None):
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73 # if the context contains no TranslationService,
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74 # create default one
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75 self.contexts['i18n'] = get_translation()
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76 self.i18n = self.contexts['i18n']
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77
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78 def translate(self, domain, msgid, mapping=None,
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79 context=None, target_language=None, default=None):
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80 if context is None:
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81 context = self.contexts.get('here')
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82 return self.i18n.translate(domain, msgid,
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83 mapping=mapping, context=context, default=default,
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84 target_language=target_language)
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85
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86 class Engine(TALES.Engine):
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87
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88 def getContext(self, contexts=None, **kwcontexts):
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89 if contexts is not None:
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90 if kwcontexts:
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91 kwcontexts.update(contexts)
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92 else:
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93 kwcontexts = contexts
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94 return Context(self, kwcontexts)
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95
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96 # patching TAL like this is a dirty hack,
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97 # but i see no other way to specify different Context class
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98 Expressions._engine = Engine(PathIterator.Iterator)
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99 Expressions.installHandlers(Expressions._engine)
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100
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101 ### main API function
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102
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103 def get_translation(language=None, tracker_home=None,
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104 translation_class=TranslationService,
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105 null_translation_class=NullTranslationService
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106 ):
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107 """Return Translation object for given language and domain
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108
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109 Arguments 'translation_class' and 'null_translation_class'
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110 specify the classes that are instantiated for existing
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111 and non-existing translations, respectively.
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112 """
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113 return i18n.get_translation(language=language,
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114 tracker_home=tracker_home,
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115 translation_class=translation_class,
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116 null_translation_class=null_translation_class)
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117
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118 # vim: set et sts=4 sw=4 :
Roundup Issue Tracker: http://roundup-tracker.org/