annotate MoinMoin/i18n/__init__.py @ 15:5a2a8201bb6f

make moin friendlier to proxies, thanks to ASF imported from: moin--main--1.5--patch-16
author Thomas Waldmann <tw@waldmann-edv.de>
date Fri, 23 Sep 2005 20:02:07 +0000
parents 77665d8e2254
children f1e33f7ad2e6
rev   line source
0
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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 @license: GNU GPL, see COPYING for details.
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26 """
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27
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28 import os
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29
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30 try:
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31 import cPickle as pickle
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32 except ImportError:
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33 import pickle
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34
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35 # Set pickle protocol, see http://docs.python.org/lib/node64.html
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36 PICKLE_PROTOCOL = pickle.HIGHEST_PROTOCOL
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37
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38 from MoinMoin import config
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39 from MoinMoin.Page import Page
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40
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41 NAME, ENAME, ENCODING, DIRECTION, MAINTAINER = range(0,5)
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42 # we do not generate this on the fly due to performance reasons -
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43 # importing N languages would be slow for CGI...
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44 from meta import languages
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45
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46 # This is a global for a reason: in persistent environments all
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47 # languages in use will be cached; Note: you have to restart if you
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48 # update language data in such environments.
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49 _text_cache = {}
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50
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51 # also cache the unformatted strings...
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52 _unformatted_text_cache = {}
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53
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54 # remember what has been marked up correctly already
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55 _done_markups = {}
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56
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57 def filename(lang):
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58 """
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59 Return the filename for lang
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60
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61 This is not always the same as the language name. This function hides
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62 the naming details from the clients.
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63 """
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64 filename = lang.replace('-', '_')
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65 filename = filename.lower()
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66 return filename
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67
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68 def formatMarkup(request, text, currentStack = []):
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69 """
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70 Formats the text passed according to wiki markup.
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71 This raises an exception if a text needs itself to be translated,
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72 this could possibly happen with macros.
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73 """
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74 try:
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75 currentStack.index(text)
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76 raise Exception("Formatting a text that is being formatted?!")
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77 except ValueError:
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78 pass
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79 currentStack.append(text)
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80
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81 from MoinMoin.Page import Page
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82 from MoinMoin.parser.wiki import Parser
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83 from MoinMoin.formatter.text_html import Formatter
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84 import StringIO
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85
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86 origtext = text
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87 out = StringIO.StringIO()
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88 request.redirect(out)
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89 parser = Parser(text, request)
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90 formatter = Formatter(request, terse = True)
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91 reqformatter = None
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92 if hasattr(request, 'formatter'):
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93 reqformatter = request.formatter
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94 request.formatter = formatter
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95 p = Page(request, "$$$$i18n$$$$")
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96 formatter.setPage(p)
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97 parser.format(formatter)
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98 text = out.getvalue()
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99 if reqformatter == None:
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100 del request.formatter
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101 else:
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102 request.formatter = reqformatter
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103 request.redirect()
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104 del currentStack[-1]
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105 text = text.strip()
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106 return text
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107
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108 def loadLanguage(request, lang):
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109 """
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110 Load text dictionary for a specific language.
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111
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112 Note that while ISO language coded use a dash, like 'en-us', our
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113 languages files use '_' like 'en_us' because they are saved as
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114 Python source files.
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115
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116 Raises an exception if this method is called from within itself
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117 (by the formatter). In that case, the translation file is buggy.
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118 Possible causes are having a text that is interpreted to again
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119 need a text in the same language. That means you cannot use
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120 the GetText macro in translated strings, nor any wiki markup
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121 that requires translated strings (eg. "attachment:").
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122
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123 """
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124 from MoinMoin import caching
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125 cache = caching.CacheEntry(request, arena='i18n', key=lang)
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126 langfilename = os.path.join(os.path.dirname(__file__), filename(lang) + '.py')
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127 needsupdate = cache.needsUpdate(langfilename)
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128 if not needsupdate:
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129 try:
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130 (uc_texts, uc_unformatted) = pickle.loads(cache.content())
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131 except (IOError,ValueError,pickle.UnpicklingError): #bad pickle data, no pickle
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132 needsupdate = 1
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133
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134 if needsupdate:
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135 from MoinMoin.util import pysupport
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136 lang_module = "MoinMoin.i18n." + filename(lang)
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137 texts = pysupport.importName(lang_module, "text")
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138 if not texts:
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139 return (None, None)
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140 meta = pysupport.importName(lang_module, "meta")
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141 encoding = meta['encoding']
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142
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143 # convert to unicode
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144 uc_texts = {}
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145 for idx in texts:
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146 uidx = idx.decode(encoding)
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147 utxt = texts[idx].decode(encoding)
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148 uc_texts[uidx] = utxt
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149 uc_unformatted = uc_texts.copy()
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150
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151 # is this already on wiki markup?
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152 if meta.get('wikimarkup', False):
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153 # use the wiki parser now to replace some wiki markup with html
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154 text = ""
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155 global _done_markups
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156 if not _done_markups.has_key(lang):
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157 _done_markups[lang] = 1
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158 for key in uc_texts:
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159 text = uc_texts[key]
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160 uc_texts[key] = formatMarkup(request, text)
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161 _done_markups[lang] = 2
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162 else:
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163 if _done_markups[lang] == 1:
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164 raise Exception("Cyclic usage detected; you cannot have translated texts include translated texts again! "
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165 "This error might also occur because of things that are interpreted wiki-like inside translated strings. "
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166 "This time the error occurred while formatting %s." % text)
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167 cache.update(pickle.dumps((uc_texts, uc_unformatted), PICKLE_PROTOCOL))
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168
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169 return (uc_texts, uc_unformatted)
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170
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171
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172 def requestLanguage(request):
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173 """
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174 Return the user interface language for this request.
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175
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176 The user interface language is taken from the user preferences for
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177 registered users, or request environment, or the default language of
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178 the wiki, or English.
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179
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180 This should be called once per request, then you should get the
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181 value from request object lang attribute.
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182
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183 Unclear what this means: "Until the code for get
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184 text is fixed, we are caching the request language locally."
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185
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186 @param request: the request object
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187 @keyword usecache: whether to get the value form the local cache or
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188 actually look for it. This will update the cache data.
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189 @rtype: string
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190 @return: ISO language code, e.g. 'en'
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191 """
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192
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193 # Return the user language preferences for registered users
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194 if request.user.valid and request.user.language:
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195 return request.user.language
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196
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197 # Or try to return one of the user browser accepted languages, if it
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198 # is available on this wiki...
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199 available = wikiLanguages()
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200 for lang in browserLanguages(request):
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201 if available.has_key(lang):
15
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202 if request.http_accept_language:
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203 request.setHttpHeader('Vary: Accept-Language')
0
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204 return lang
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205
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206 # Or return the wiki default language...
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207 if available.has_key(request.cfg.default_lang):
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208 lang = request.cfg.default_lang
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209
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210 # If everything else fails, read the manual... or return 'en'
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211 else:
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212 lang = 'en'
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213
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214 return lang
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215
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216
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217 def wikiLanguages():
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218 """
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219 Return the available user languages in this wiki.
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220
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221 Since the wiki has only one charset set by the admin, and the user
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222 interface files could have another charset, not all languages are
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223 available on every wiki - unless we move to Unicode for all
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224 languages translations. Even then, Python still can't recode some
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225 charsets.
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226
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227 !!! Note: we use strict = 1 to choose only language that we can
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228 recode strictly from the language encodings to the wiki
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229 encoding. This preference could be left to the wiki admin instead.
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230
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231 Return a dict containing a subset of MoinMoin languages ISO codes.
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232 """
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233
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234 available = {}
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235 for lang in languages.keys():
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236 encoding = languages[lang][ENCODING].lower()
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237 if (encoding == config.charset or
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238 canRecode(encoding, config.charset, strict=1)):
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239 available[lang] = languages[lang]
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240
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241 return available
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242
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243
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244 def browserLanguages(request):
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245 """
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246 Return the accepted languages as set in the user browser.
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247
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
248 Parse the HTTP headers and extract the accepted languages,
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
249 according to
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
250 http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
251
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
252 Return a list of languages and base languages - as they are
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
253 specified in the request, normalizing to lower case.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
254 """
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
255
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
256 fallback = []
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
257
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
258 accepted = request.http_accept_language
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
259
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
260 if accepted:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
261 # Extract the languages names from the string
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
262 accepted = accepted.split(',')
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
263
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
264 accepted = map(lambda x: x.split(';')[0], accepted)
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
265
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
266 # Add base language for each sub language. If the user specified
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
267 # a sub language like "en-us", we will try to to provide it or
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
268 # a least the base language "en" in this case.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
269 for lang in accepted:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
270 lang = lang.lower()
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
271 fallback.append(lang)
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
272 if '-' in lang:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
273 baselang = lang.split('-')[0]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
274 fallback.append(baselang)
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
275
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
276 return fallback
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
277
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
278
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
279 def getDirection(lang):
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
280 """Return the text direction for a language, either 'ltr' or 'rtl'."""
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
281 return ('ltr', 'rtl')[languages[lang][DIRECTION]]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
282
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
283
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
284 def getText(str, request, lang, formatted = True):
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
285 """
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
286 Return a translation of text in the user's language.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
287 """
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
288 # TODO: Should move this into a language instance. request.lang should be a language instance.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
289
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
290 # load texts if needed
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
291 global _text_cache
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
292 if not _text_cache.has_key(lang):
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
293 (texts, unformatted) = loadLanguage(request, lang)
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
294 # XXX add error handling
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
295 _text_cache[lang] = texts
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
296 _unformatted_text_cache[lang] = unformatted
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
297
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
298 # get the matching entry in the mapping table
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
299
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
300 trans = str
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
301 try:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
302 if formatted:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
303 trans = _text_cache[lang][str]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
304 else:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
305 trans = _unformatted_text_cache[lang][str]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
306 except KeyError:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
307 try:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
308 language = languages[lang][ENAME]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
309 dictpagename = "%sDict" % language
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
310 if Page(request, dictpagename).exists():
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
311 dicts = request.dicts
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
312 if dicts.has_dict(dictpagename):
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
313 userdict = dicts.dict(dictpagename)
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
314 trans = userdict[str]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
315 except KeyError:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
316 pass
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
317 return trans
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
318
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
319
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
320 ########################################################################
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
321 # Encoding
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
322 ########################################################################
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
323
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
324 def canRecode(input, output, strict=1):
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
325 """
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
326 Check if we can recode text from input to output.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
327
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
328 Return 1 if we can probably recode from one charset to
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
329 another, or 0 if the charset are not known or compatible.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
330
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
331 arguments:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
332 input -- the input encoding codec name or alias
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
333 output -- the output encoding codec name or alias
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
334 strict -- Are you going to recode using errors='strict' or you can
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
335 get with 'ignore', 'replace' or other error levels?
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
336 """
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
337
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
338 import codecs
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
339
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
340 # First normalize case - our client could have funny ideas about case
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
341 input = input.lower()
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
342 output = output.lower()
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
343
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
344 # Check for known encodings
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
345 try:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
346 encoder = codecs.getencoder(output)
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
347 decoder = codecs.getdecoder(input)
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
348 except LookupError:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
349 # Unknown encoding - forget about it!
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
350 return 0
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
351
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
352 # We assume that any charset that Python knows about, can be recoded
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
353 # 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
354 # check the codec name itself
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
355 if encoder.__name__.startswith('utf'):
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
356 # This is a unicode encoding, so input could be anything.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
357 return 1
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
358
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
359 # We know both encodings but we don't know if we can actually recode
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
360 # any text from one to another. For example, we can recode from
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
361 # iso-8859-8 to cp1255, because the first is a subset of the last,
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
362 # but not the other way around.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
363 # 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
364 if strict:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
365 # We are not sure, so NO
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
366 return 0
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
367 else:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
368 # Probably you can recode using 'replace' or 'ignore' or other
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
369 # encodings error level and be happy with the results, so YES
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
370 return 1
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
371