Source Code for Module camelot.camelot.model.i18n

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26  #  =============================================================================
 
27  """Set of classes to enable internationalization of the user interface""" 
28  
 
29  from camelot.model import * 
30  __metadata__ = metadata 
31  
 
32  from camelot.view.elixir_admin import EntityAdmin 
33  
 
34  import locale 
35  import logging 
36  logger = logging.getLogger('camelot.model.i18n') 
37  
 
38  locale.setlocale(locale.LC_ALL, '') 
39  language, encoding = locale.getlocale(locale.LC_ALL) 
40  
 
41  tr = lambda source:Translation.translate_or_register(source, language)  
42  
 
43 -class Translation(Entity): 
44    using_options(tablename='translation') 
45    language = Field(Unicode(20), index=True) 
46    source = Field(Unicode(500), index=True) 
47    value = Field(Unicode(500)) 
48    cid = Field(INT(), default=0, index=True) 
49    uid = Field(INT(), default=0, index=True) 
50      
 
51    # cache, to prevent too much of the same sql queries
 
52    _cache = dict() 
53      
 
54 -  class Admin(EntityAdmin): 
55      section = 'configuration' 
56      list_display = ['source', 'language', 'value', 'uid'] 
57      list_filter = ['language'] 
58          
 
59    @classmethod 
60 -  def translate(cls, source, language): 
61      """Translate source to language, return None if no translation is found""" 
62      if source: 
63        key = (source, language) 
64        if key in cls._cache: 
65          return cls._cache[key] 
66        translation = cls.query.filter_by(source=unicode(source), language=language).filter(Translation.uid!=0).first() 
67        if translation: 
68          cls._cache[key] = translation.value 
69          return translation.value 
70        return None 
71      return '' 
72  
 
73    @classmethod 
74 -  def translate_or_register(cls, source, language): 
75      """Translate source to language, if no translation is found, register the
 
76      source as to be translated and return the source""" 
77      if source: 
78        source = unicode(source) 
79        translation = cls.translate(source, language) 
80        if not translation: 
81          if not cls.query.filter_by(source=source, language=language).first(): 
82            if (source, language) not in cls._cache: 
83              from elixir import session 
84              registered_translation = Translation(source=source, language=language) 
85              cls._cache[(source, language)] = source 
86              session.flush([registered_translation]) 
87              logger.debug('registed %s with id %s'%(source, registered_translation.id)) 
88          return source 
89        return translation 
90      return '' 
91