annotate MoinMoin/i18n/__init__.py @ 493:993d53631fee

make some action menu entries translatable imported from: moin--main--1.5--patch-497
author Thomas Waldmann <tw@waldmann-edv.de>
date Wed, 22 Mar 2006 11:41:52 +0000
parents 9082a95430db
children fc74944187ad
rev   line source
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1 # -*- coding: iso-8859-1 -*-
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2 """
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3 MoinMoin - Internationalization
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4
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5 This subpackage controls the access to the language modules
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6 contained in it. Each language is in a module with a dictionary
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7 storing the original texts as keys and their translation in the
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8 values. Other supporting modules start with an underscore.
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9
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10 Public attributes:
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11 languages -- languages that MoinMoin knows about
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12 NAME, ENCODING, DIRECTION, MAINTAINER -- named indexes
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13
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14 Public functions:
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15 filename(lang) -- return the filename of lang
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16 loadLanguage(request, lang) -- load text dictionary for a specific language, returns (formatted, unformatted)
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17 requestLanguage(request, usecache=1) -- return the request language
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18 wikiLanguages() -- return the available wiki user languages
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19 browserLanguages() -- return the browser accepted languages
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20 getDirection(lang) -- return the lang direction either 'ltr' or 'rtl'
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21 getText(str, request) -- return str translation
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22 canRecode(input, output, strict) -- check recode ability
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23
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24 @copyright: 2001-2004 by Jürgen Hermann <jh@web.de>
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25 @copyright: 2005 by Thomas Waldmann
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26 @license: GNU GPL, see COPYING for details.
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27 """
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28 debug = 0
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29
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30 import os
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31
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32 try:
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33 import cPickle as pickle
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34 except ImportError:
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35 import pickle
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36
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37 # Set pickle protocol, see http://docs.python.org/lib/node64.html
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38 PICKLE_PROTOCOL = pickle.HIGHEST_PROTOCOL
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39
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40 from MoinMoin.Page import Page
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41
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42 NAME, ENAME, ENCODING, DIRECTION, MAINTAINER = range(0,5)
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43 # we do not generate this on the fly due to performance reasons -
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44 # importing N languages would be slow for CGI...
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45 from meta import languages
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46
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47 # This is a global for a reason: in persistent environments all
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48 # languages in use will be cached; Note: you have to restart if you
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49 # update language data in such environments.
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50 _text_cache = {}
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51
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52 # also cache the unformatted strings...
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53 _unformatted_text_cache = {}
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54
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55 def filename(lang):
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56 """
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57 Return the filename for lang
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58
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59 This is not always the same as the language name. This function hides
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60 the naming details from the clients.
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61 """
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62 filename = lang.replace('-', '_')
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63 filename = filename.lower()
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64 return filename
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65
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66
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67 def formatMarkup(request, text, currentStack = []):
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68 """
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69 Formats the text passed according to wiki markup.
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70 This raises an exception if a text needs itself to be translated,
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71 this could possibly happen with macros.
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72 """
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73 try:
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74 currentStack.index(text)
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75 raise Exception("Formatting a text that is being formatted?!")
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76 except ValueError:
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77 pass
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78 currentStack.append(text)
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79
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80 from MoinMoin.parser.wiki import Parser
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81 from MoinMoin.formatter.text_html import Formatter
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82 import StringIO
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83
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84 origtext = text
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85 out = StringIO.StringIO()
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86 request.redirect(out)
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87 parser = Parser(text, request, line_anchors=False)
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88 formatter = Formatter(request, terse = True)
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89 reqformatter = None
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90 if hasattr(request, 'formatter'):
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91 reqformatter = request.formatter
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92 request.formatter = formatter
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93 p = Page(request, "$$$$i18n$$$$")
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94 formatter.setPage(p)
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95 parser.format(formatter)
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96 text = out.getvalue()
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97 if reqformatter == None:
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98 del request.formatter
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99 else:
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100 request.formatter = reqformatter
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101 request.redirect()
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102 del currentStack[-1]
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103 text = text.strip()
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104 return text
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105
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106
0
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107 def loadLanguage(request, lang):
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108 """
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109 Load text dictionary for a specific language.
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110
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111 Note that while ISO language coded use a dash, like 'en-us', our
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112 languages files use '_' like 'en_us' because they are saved as
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113 Python source files.
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114
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115 Raises an exception if this method is called from within itself
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116 (by the formatter). In that case, the translation file is buggy.
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117 Possible causes are having a text that is interpreted to again
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118 need a text in the same language. That means you cannot use
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119 the GetText macro in translated strings, nor any wiki markup
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120 that requires translated strings (eg. "attachment:").
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121
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122 """
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123 from MoinMoin import caching
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124 # farm notice: for persistent servers, only the first wiki requesting some language
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125 # gets its cache updated - a bit strange and redundant, but no problem.
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126 cache = caching.CacheEntry(request, arena='i18n', key=lang)
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127 langfilename = os.path.join(os.path.dirname(__file__), filename(lang) + '.py')
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128 needsupdate = cache.needsUpdate(langfilename)
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129 if debug: request.log("i18n: langfilename %s needsupdate %d" % (langfilename, needsupdate))
0
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130 if not needsupdate:
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131 try:
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132 (uc_texts, uc_unformatted) = pickle.loads(cache.content())
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133 except (IOError, ValueError, pickle.UnpicklingError): # bad pickle data, no pickle
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134 if debug: request.log("i18n: pickle %s load failed" % lang)
0
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135 needsupdate = 1
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136
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137 if needsupdate:
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138 from MoinMoin.util import pysupport
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139 lang_module = "MoinMoin.i18n." + filename(lang)
51
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140 try:
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141 # Language module without text dict will raise AttributeError
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142 texts = pysupport.importName(lang_module, "text")
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143 except ImportError:
489
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144 if debug: request.log("i18n: import of module %s failed." % lang_module)
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145 return None, None
0
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146 meta = pysupport.importName(lang_module, "meta")
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147 encoding = meta['encoding']
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148
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149 # convert to unicode
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150 if debug: request.log("i18n: processing unformatted texts of lang %s" % lang)
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151 uc_unformatted = {}
0
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152 for idx in texts:
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153 uidx = idx.decode(encoding)
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154 utxt = texts[idx].decode(encoding)
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155 uc_unformatted[uidx] = utxt
0
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156
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157 if meta.get('wikimarkup', False):
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158 if debug: request.log("i18n: processing formatted texts of lang %s" % lang)
0
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159 # use the wiki parser now to replace some wiki markup with html
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160 uc_texts = {}
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161 for key, text in uc_unformatted.items():
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162 try:
0
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163 uc_texts[key] = formatMarkup(request, text)
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164 except: # infinite recursion or crash
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165 request.log("i18n: crashes in language %s on string: %s" % (lang, text))
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166 uc_texts[key] = "FIXME: %s" % text
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167 else:
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168 uc_texts = uc_unformatted
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169 if debug: request.log("i18n: dumping lang %s" % lang)
0
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170 cache.update(pickle.dumps((uc_texts, uc_unformatted), PICKLE_PROTOCOL))
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171
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diff changeset
172 return uc_texts, uc_unformatted
0
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173
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174
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175 def requestLanguage(request):
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176 """
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177 Return the user interface language for this request.
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178
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179 The user interface language is taken from the user preferences for
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180 registered users, or request environment, or the default language of
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181 the wiki, or English.
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182
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183 This should be called once per request, then you should get the
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184 value from request object lang attribute.
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185
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186 Unclear what this means: "Until the code for get
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187 text is fixed, we are caching the request language locally."
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188
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189 @param request: the request object
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190 @keyword usecache: whether to get the value form the local cache or
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191 actually look for it. This will update the cache data.
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192 @rtype: string
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193 @return: ISO language code, e.g. 'en'
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194 """
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195
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196 # Return the user language preferences for registered users
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197 if request.user.valid and request.user.language:
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198 return request.user.language
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199
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200 # Or try to return one of the user browser accepted languages, if it
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201 # is available on this wiki...
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202 available = wikiLanguages()
131
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203 if not request.cfg.language_ignore_browser:
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204 for lang in browserLanguages(request):
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205 if available.has_key(lang):
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206 if request.http_accept_language:
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diff changeset
207 request.setHttpHeader('Vary: Accept-Language')
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diff changeset
208 return lang
0
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209
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210 # Or return the wiki default language...
131
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211 if available.has_key(request.cfg.language_default):
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diff changeset
212 lang = request.cfg.language_default
0
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213
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214 # If everything else fails, read the manual... or return 'en'
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215 else:
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216 lang = 'en'
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217
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218 return lang
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219
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220
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221 def wikiLanguages():
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222 """
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223 Return the available user languages in this wiki.
159
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224 As we do everything in unicode (or utf-8) now, everything is available.
0
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225 """
159
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226 return languages
0
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227
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228
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229 def browserLanguages(request):
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230 """
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231 Return the accepted languages as set in the user browser.
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232
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233 Parse the HTTP headers and extract the accepted languages,
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234 according to
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235 http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
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236
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237 Return a list of languages and base languages - as they are
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238 specified in the request, normalizing to lower case.
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239 """
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240
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241 fallback = []
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242
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243 accepted = request.http_accept_language
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244
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245 if accepted:
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246 # Extract the languages names from the string
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247 accepted = accepted.split(',')
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248
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249 accepted = map(lambda x: x.split(';')[0], accepted)
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250
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251 # Add base language for each sub language. If the user specified
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252 # a sub language like "en-us", we will try to to provide it or
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253 # a least the base language "en" in this case.
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parents:
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254 for lang in accepted:
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255 lang = lang.lower()
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Thomas Waldmann <tw-public@gmx.de>
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diff changeset
256 fallback.append(lang)
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257 if '-' in lang:
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258 baselang = lang.split('-')[0]
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259 fallback.append(baselang)
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260
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diff changeset
261 return fallback
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262
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Thomas Waldmann <tw-public@gmx.de>
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263
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Thomas Waldmann <tw-public@gmx.de>
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264 def getDirection(lang):
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265 """Return the text direction for a language, either 'ltr' or 'rtl'."""
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266 return ('ltr', 'rtl')[languages[lang][DIRECTION]]
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267
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268
67
24ec4c3430cf better fallback for i18n strings not found: use formatted en translation
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diff changeset
269 def getText(str, request, lang, formatted=True):
0
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270 """
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271 Return a translation of text in the user's language.
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272 """
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273 # TODO: Should move this into a language instance. request.lang should be a language instance.
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274
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275 # load texts if needed
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276 global _text_cache
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Thomas Waldmann <tw-public@gmx.de>
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277 if not _text_cache.has_key(lang):
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278 (texts, unformatted) = loadLanguage(request, lang)
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279 # XXX add error handling
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280 _text_cache[lang] = texts
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281 _unformatted_text_cache[lang] = unformatted
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282
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283 # get the matching entry in the mapping table
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284
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285 trans = str
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286 try:
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287 if formatted:
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288 trans = _text_cache[lang][str]
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289 else:
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290 trans = _unformatted_text_cache[lang][str]
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291 except KeyError:
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292 try:
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293 language = languages[lang][ENAME]
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294 dictpagename = "%sDict" % language
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295 if Page(request, dictpagename).exists():
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296 dicts = request.dicts
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297 if dicts.has_dict(dictpagename):
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298 userdict = dicts.dict(dictpagename)
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299 trans = userdict[str]
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parents:
diff changeset
300 except KeyError:
67
24ec4c3430cf better fallback for i18n strings not found: use formatted en translation
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parents: 51
diff changeset
301 # do not simply return trans with str, but recursively call
24ec4c3430cf better fallback for i18n strings not found: use formatted en translation
Thomas Waldmann <tw@waldmann-edv.de>
parents: 51
diff changeset
302 # to get english translation, maybe formatted
24ec4c3430cf better fallback for i18n strings not found: use formatted en translation
Thomas Waldmann <tw@waldmann-edv.de>
parents: 51
diff changeset
303 if lang != 'en':
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diff changeset
304 trans = getText(str, request, 'en', formatted)
0
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parents:
diff changeset
305 return trans
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parents:
diff changeset
306
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
307
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diff changeset
308 def canRecode(input, output, strict=1):
159
74bcce9d3dae i18n code cleanup
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diff changeset
309 """ Check if we can recode text from input to output.
0
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parents:
diff changeset
310
159
74bcce9d3dae i18n code cleanup
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parents: 131
diff changeset
311 @param input: the input encoding codec name or alias
74bcce9d3dae i18n code cleanup
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parents: 131
diff changeset
312 @param output: the output encoding codec name or alias
74bcce9d3dae i18n code cleanup
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parents: 131
diff changeset
313 @param strict: Are you going to recode using errors='strict' or you can
74bcce9d3dae i18n code cleanup
Thomas Waldmann <tw@waldmann-edv.de>
parents: 131
diff changeset
314 get with 'ignore', 'replace' or other error levels?
74bcce9d3dae i18n code cleanup
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parents: 131
diff changeset
315 @rtype: bool
74bcce9d3dae i18n code cleanup
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parents: 131
diff changeset
316 @return: True if we can probably recode from one charset to another or
74bcce9d3dae i18n code cleanup
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diff changeset
317 False if the charset are not known or compatible.
0
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diff changeset
318 """
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parents:
diff changeset
319
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parents:
diff changeset
320 import codecs
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
321
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parents:
diff changeset
322 # First normalize case - our client could have funny ideas about case
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parents:
diff changeset
323 input = input.lower()
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parents:
diff changeset
324 output = output.lower()
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
325
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diff changeset
326 # Check for known encodings
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parents:
diff changeset
327 try:
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parents:
diff changeset
328 encoder = codecs.getencoder(output)
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parents:
diff changeset
329 decoder = codecs.getdecoder(input)
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
330 except LookupError:
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
331 # Unknown encoding - forget about it!
159
74bcce9d3dae i18n code cleanup
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parents: 131
diff changeset
332 return False
0
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
333
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
334 # We assume that any charset that Python knows about, can be recoded
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parents:
diff changeset
335 # into any Unicode charset. Because codecs have many aliases, we
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
336 # check the codec name itself
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
337 if encoder.__name__.startswith('utf'):
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
338 # This is a unicode encoding, so input could be anything.
159
74bcce9d3dae i18n code cleanup
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parents: 131
diff changeset
339 return True
0
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
340
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
341 # We know both encodings but we don't know if we can actually recode
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parents:
diff changeset
342 # any text from one to another. For example, we can recode from
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
343 # iso-8859-8 to cp1255, because the first is a subset of the last,
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
344 # but not the other way around.
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parents:
diff changeset
345 # We choose our answer according to the strict keyword argument
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
346 if strict:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
347 # We are not sure, so NO
159
74bcce9d3dae i18n code cleanup
Thomas Waldmann <tw@waldmann-edv.de>
parents: 131
diff changeset
348 return False
0
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
349 else:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
350 # Probably you can recode using 'replace' or 'ignore' or other
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
351 # encodings error level and be happy with the results, so YES
159
74bcce9d3dae i18n code cleanup
Thomas Waldmann <tw@waldmann-edv.de>
parents: 131
diff changeset
352 return True
0
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
353