Source Code for Module library.pyjamas.JSONTranslations

  1  # Copyright (C) 2012 Kees Bos <cornelis.bos@gmail.com> 
  2  # LISENCE : Apache 2.0 or WTFPL, choose what suits your needs 
  3  # 
  4   
  5  from gettext import NullTranslations 
  6  import re 
  7  from JSONService import loads 
  8  from HTTPRequest import HTTPRequest 
  9   
 10  try: 
 11      from gettext import c2py 
 12  except ImportError: 
 13      from __pyjamas__ import JS 
 14 -    def c2py(plural): 
 15          f = None 
 16          JS('''eval("@{{f}}=function(n){return " + @{{plural}} + ";}")''') 
 17          return f 
 18   
 19   
 20 -class JSONTranslations(NullTranslations): 
 21      re_nplurals = re.compile('nplurals *= *(\d+)') 
 22      re_plural = re.compile('plural *= *([^;]+)') 
 23      base_url = None 
 24      domain = None 
 25   
 26 -    def __init__(self, *args, **kwargs): 
 27          NullTranslations.__init__(self, *args, **kwargs) 
 28          self.new_catalog() 
 29   
 30 -    def new_catalog(self, base_url=None, domain=None, lang=None): 
 31          self._catalog = {} 
 32          self.lang = lang 
 33          self.plural = lambda n: int(n != 1) # germanic plural by default 
 34   
 35 -    def load(self, base_url=None, domain=None, lang=None, onCompletion=None, onError=None): 
 36          if base_url is None: 
 37              base_url = self.base_url 
 38          if domain is None: 
 39              domain = self.domain 
 40          url = base_url 
 41          if domain is not None and lang is not None: 
 42              url = "%s/%s_%s.json" % (url, domain, lang) 
 43          self.new_catalog(base_url, domain, lang) 
 44          self._onCompletion = onCompletion 
 45          self._onError = onError 
 46          HTTPRequest().asyncGet(url, self) 
 47   
 48 -    def onCompletion(self, text): 
 49          self.parse_json(text) 
 50          if self._onCompletion is not None: 
 51              self._onCompletion(text) 
 52   
 53 -    def onError(self, text, code): 
 54          if self._onError is not None: 
 55              self._onError(text, code) 
 56          raise RuntimeError(code) 
 57   
 58 -    def onTimeout(self, text): 
 59          pass 
 60   
 61 -    def onProgress(self, event): 
 62          pass 
 63   
 64 -    def parse_json(self, text): 
 65          json = loads(text) 
 66          self._catalog.update(json) 
 67          for k, v in self._catalog[""].iteritems(): 
 68              k = k.lower() 
 69              if k == 'plural-forms': 
 70                  self.nplurals = int(self.re_nplurals.search(v).group(1)) 
 71                  self.plural = c2py(self.re_plural.search(v).group(1)) 
 72   
 73 -    def _parse(self, url): 
 74          self.load(url) 
 75   
 76 -    def gettext(self, message): 
 77          tmsg = self._catalog.get(message) 
 78          if tmsg is None: 
 79              if self._fallback: 
 80                  return self._fallback.gettext(message) 
 81              return message 
 82          return tmsg[0] 
 83   
 84 -    def ngettext(self, msgid1, msgid2, n): 
 85          tmsg = self._catalog.get(msgid1) 
 86          if tmsg is None: 
 87              if self._fallback: 
 88                  return self._fallback.ngettext(msgid1, msgid2, n) 
 89              if self.plural(n): 
 90                  return msgid2 
 91              return msgid1 
 92          else: 
 93              return tmsg[self.plural(n)] 
 94   
 95      lgettext = gettext 
 96      lngettext = ngettext 
 97      ugettext = gettext 
 98      ungettext = ngettext 
 99