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annotate roundup/cgi/TranslationService.py @ 2806:845e87d5e3ba

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translator objects now have the following search path: - selected locale messages in the tracker locale dir - selected locale messages in the system locale dir - english messages in the tracker locale dir - english messages in the system locale dir automatically compile .mo files if needed (found .po file and .mo is missing or .po mtime is greater that .mo mtime) removed support for python < 2.0. gettext module is now required. get_translation: removed 'domain' argument, added 'tracker_home' argument
author Alexander Smishlajev <a1s@users.sourceforge.net>
date Sat, 23 Oct 2004 14:03:34 +0000
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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 __version__ = "$Revision: 1.1 $"[11:-2]
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17 __date__ = "$Date: 2004-07-11 14:17:17 $"[7:-2]
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18
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19 from roundup import i18n
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20 from roundup.cgi.PageTemplates import Expressions, PathIterator, TALES
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21 from roundup.cgi.TAL import TALInterpreter
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22
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23 ### Translation classes
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24
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25 class TranslationServiceMixin:
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26
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27 OUTPUT_ENCODING = "utf-8"
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28
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29 def translate(self, domain, msgid, mapping=None,
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30 context=None, target_language=None, default=None
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31 ):
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32 _msg = self.gettext(msgid)
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33 #print ("TRANSLATE", msgid, _msg, mapping, context)
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34 _msg = TALInterpreter.interpolate(_msg, mapping)
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35 return _msg
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36
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37 def gettext(self, msgid):
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38 return self.ugettext(msgid).encode(self.OUTPUT_ENCODING)
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39
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40 def ngettext(self, singular, plural, number):
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41 return self.ungettext(singular, plural, number).encode(
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42 self.OUTPUT_ENCODING)
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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 ):
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50 pass
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51
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52 ### TAL patching
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53 #
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54 # Template Attribute Language (TAL) uses only global translation service,
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55 # which is not thread-safe. We will use context variable 'i18n'
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56 # to access request-dependent transalation service (with domain
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57 # and target language set during initializations of the roundup
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58 # client interface.
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59 #
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60
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61 class Context(TALES.Context):
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62
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63 def __init__(self, compiler, contexts):
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64 TALES.Context.__init__(self, compiler, contexts)
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65 if not self.contexts.get('i18n', None):
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66 # if the context contains no TranslationService,
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67 # create default one
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68 self.contexts['i18n'] = get_translation()
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69 self.i18n = self.contexts['i18n']
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70
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71 def translate(self, domain, msgid, mapping=None,
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72 context=None, target_language=None, default=None):
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73 if context is None:
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74 context = self.contexts.get('here')
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75 return self.i18n.translate(domain, msgid,
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76 mapping=mapping, context=context, default=default,
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77 target_language=target_language)
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78
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79 class Engine(TALES.Engine):
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80
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81 def getContext(self, contexts=None, **kwcontexts):
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82 if contexts is not None:
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83 if kwcontexts:
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84 kwcontexts.update(contexts)
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85 else:
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86 kwcontexts = contexts
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87 return Context(self, kwcontexts)
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88
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89 # patching TAL like this is a dirty hack,
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90 # but i see no other way to specify different Context class
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91 Expressions._engine = Engine(PathIterator.Iterator)
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92 Expressions.installHandlers(Expressions._engine)
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93
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94 ### main API function
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95
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96 def get_translation(language=None, domain=i18n.DOMAIN,
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97 translation_class=TranslationService,
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98 null_translation_class=NullTranslationService
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99 ):
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100 """Return Translation object for given language and domain
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101
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102 Arguments 'translation_class' and 'null_translation_class'
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103 specify the classes that are instantiated for existing
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104 and non-existing translations, respectively.
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105 """
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106 return i18n.get_translation(language=language, domain=domain,
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107 translation_class=translation_class,
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108 null_translation_class=null_translation_class)
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109
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110 # vim: set et sts=4 sw=4 :
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