Mercurial > babel > mirror
annotate babel/messages/catalog.py @ 565:b0e80df660ab trunk
refactor Catalog.__cmp__ method
author | fschwarz |
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date | Mon, 26 Sep 2011 08:53:28 +0000 |
parents | 1ef087352e01 |
children | 99d51589c822 |
rev | line source |
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Add actual data structures for handling message catalogs, so that more code can be reused here between the frontends.
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1 # -*- coding: utf-8 -*- |
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2 # |
530 | 3 # Copyright (C) 2007-2011 Edgewall Software |
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4 # All rights reserved. |
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5 # |
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6 # This software is licensed as described in the file COPYING, which |
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7 # you should have received as part of this distribution. The terms |
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8 # are also available at http://babel.edgewall.org/wiki/License. |
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9 # |
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10 # This software consists of voluntary contributions made by many |
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11 # individuals. For the exact contribution history, see the revision |
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12 # history and logs, available at http://babel.edgewall.org/log/. |
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13 |
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14 """Data structures for message catalogs.""" |
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15 |
149
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16 from cgi import parse_header |
67 | 17 from datetime import datetime |
165
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18 from difflib import get_close_matches |
106
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19 from email import message_from_string |
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20 from copy import copy |
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21 import re |
67 | 22 import time |
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23 |
67 | 24 from babel import __version__ as VERSION |
64 | 25 from babel.core import Locale |
131
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26 from babel.dates import format_datetime |
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27 from babel.messages.plurals import get_plural |
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28 from babel.util import odict, distinct, LOCALTZ, UTC, FixedOffsetTimezone |
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29 |
220
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30 __all__ = ['Message', 'Catalog', 'TranslationError'] |
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31 __docformat__ = 'restructuredtext en' |
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32 |
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33 |
354 | 34 PYTHON_FORMAT = re.compile(r'''(?x) |
35 \% | |
36 (?:\(([\w]*)\))? | |
37 ( | |
38 [-#0\ +]?(?:\*|[\d]+)? | |
39 (?:\.(?:\*|[\d]+))? | |
40 [hlL]? | |
41 ) | |
42 ([diouxXeEfFgGcrs%]) | |
43 ''') | |
44 | |
45 | |
56
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46 class Message(object): |
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47 """Representation of a single message in a catalog.""" |
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48 |
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49 def __init__(self, id, string=u'', locations=(), flags=(), auto_comments=(), |
335 | 50 user_comments=(), previous_id=(), lineno=None, context=None): |
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51 """Create the message object. |
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52 |
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53 :param id: the message ID, or a ``(singular, plural)`` tuple for |
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54 pluralizable messages |
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55 :param string: the translated message string, or a |
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56 ``(singular, plural)`` tuple for pluralizable messages |
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57 :param locations: a sequence of ``(filenname, lineno)`` tuples |
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58 :param flags: a set or sequence of flags |
106
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59 :param auto_comments: a sequence of automatic comments for the message |
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60 :param user_comments: a sequence of user comments for the message |
203 | 61 :param previous_id: the previous message ID, or a ``(singular, plural)`` |
62 tuple for pluralizable messages | |
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63 :param lineno: the line number on which the msgid line was found in the |
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64 PO file, if any |
335 | 65 :param context: the message context |
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66 """ |
107 | 67 self.id = id #: The message ID |
68 | 68 if not string and self.pluralizable: |
69 string = (u'', u'') | |
107 | 70 self.string = string #: The message translation |
229 | 71 self.locations = list(distinct(locations)) |
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72 self.flags = set(flags) |
67 | 73 if id and self.python_format: |
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74 self.flags.add('python-format') |
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75 else: |
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76 self.flags.discard('python-format') |
227 | 77 self.auto_comments = list(distinct(auto_comments)) |
78 self.user_comments = list(distinct(user_comments)) | |
203 | 79 if isinstance(previous_id, basestring): |
80 self.previous_id = [previous_id] | |
200
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81 else: |
203 | 82 self.previous_id = list(previous_id) |
220
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83 self.lineno = lineno |
335 | 84 self.context = context |
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85 |
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86 def __repr__(self): |
196
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87 return '<%s %r (flags: %r)>' % (type(self).__name__, self.id, |
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88 list(self.flags)) |
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89 |
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90 def __cmp__(self, obj): |
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91 """Compare Messages, taking into account plural ids""" |
565 | 92 def values_to_compare(): |
93 if isinstance(obj, Message): | |
94 plural = self.pluralizable | |
95 obj_plural = obj.pluralizable | |
96 if plural and obj_plural: | |
97 return self.id[0], obj.id[0] | |
98 elif plural: | |
99 return self.id[0], obj.id | |
100 elif obj_plural: | |
101 return self.id, obj.id[0] | |
102 return self.id, obj.id | |
103 this, other = values_to_compare() | |
104 return cmp(this, other) | |
248
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105 |
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106 def __gt__(self, other): |
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107 return self.__cmp__(other) > 0 |
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108 |
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109 def __lt__(self, other): |
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110 return self.__cmp__(other) < 0 |
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111 |
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112 def __ge__(self, other): |
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113 return self.__cmp__(other) >= 0 |
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114 |
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115 def __le__(self, other): |
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116 return self.__cmp__(other) <= 0 |
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117 |
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118 def __eq__(self, other): |
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119 return self.__cmp__(other) == 0 |
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120 |
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121 def __ne__(self, other): |
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122 return self.__cmp__(other) != 0 |
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123 |
313
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124 def clone(self): |
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125 return Message(*map(copy, (self.id, self.string, self.locations, |
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126 self.flags, self.auto_comments, |
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127 self.user_comments, self.previous_id, |
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128 self.lineno, self.context))) |
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129 |
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130 def check(self, catalog=None): |
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131 """Run various validation checks on the message. Some validations |
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132 are only performed if the catalog is provided. This method returns |
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133 a sequence of `TranslationError` objects. |
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134 |
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135 :rtype: ``iterator`` |
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136 :param catalog: A catalog instance that is passed to the checkers |
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137 :see: `Catalog.check` for a way to perform checks for all messages |
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138 in a catalog. |
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139 """ |
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140 from babel.messages.checkers import checkers |
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141 errors = [] |
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142 for checker in checkers: |
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143 try: |
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144 checker(catalog, self) |
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145 except TranslationError, e: |
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146 errors.append(e) |
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147 return errors |
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148 |
67 | 149 def fuzzy(self): |
150 return 'fuzzy' in self.flags | |
151 fuzzy = property(fuzzy, doc="""\ | |
152 Whether the translation is fuzzy. | |
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153 |
67 | 154 >>> Message('foo').fuzzy |
155 False | |
175
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156 >>> msg = Message('foo', 'foo', flags=['fuzzy']) |
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157 >>> msg.fuzzy |
67 | 158 True |
175
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159 >>> msg |
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160 <Message 'foo' (flags: ['fuzzy'])> |
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161 |
67 | 162 :type: `bool` |
163 """) | |
164 | |
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165 def pluralizable(self): |
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166 return isinstance(self.id, (list, tuple)) |
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167 pluralizable = property(pluralizable, doc="""\ |
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168 Whether the message is plurizable. |
200
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169 |
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170 >>> Message('foo').pluralizable |
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171 False |
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172 >>> Message(('foo', 'bar')).pluralizable |
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173 True |
200
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174 |
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175 :type: `bool` |
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176 """) |
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177 |
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178 def python_format(self): |
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179 ids = self.id |
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180 if not isinstance(ids, (list, tuple)): |
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181 ids = [ids] |
220
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182 return bool(filter(None, [PYTHON_FORMAT.search(id) for id in ids])) |
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183 python_format = property(python_format, doc="""\ |
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184 Whether the message contains Python-style parameters. |
200
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185 |
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186 >>> Message('foo %(name)s bar').python_format |
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187 True |
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188 >>> Message(('foo %(name)s', 'foo %(name)s')).python_format |
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189 True |
200
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190 |
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191 :type: `bool` |
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192 """) |
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193 |
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194 |
220
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195 class TranslationError(Exception): |
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196 """Exception thrown by translation checkers when invalid message |
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197 translations are encountered.""" |
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198 |
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199 |
104
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200 DEFAULT_HEADER = u"""\ |
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201 # Translations template for PROJECT. |
120 | 202 # Copyright (C) YEAR ORGANIZATION |
104
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203 # This file is distributed under the same license as the PROJECT project. |
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204 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR. |
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205 #""" |
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206 |
196
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207 |
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208 class Catalog(object): |
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209 """Representation of a message catalog.""" |
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210 |
104
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211 def __init__(self, locale=None, domain=None, header_comment=DEFAULT_HEADER, |
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212 project=None, version=None, copyright_holder=None, |
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213 msgid_bugs_address=None, creation_date=None, |
206
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214 revision_date=None, last_translator=None, language_team=None, |
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215 charset='utf-8', fuzzy=True): |
64 | 216 """Initialize the catalog object. |
200
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217 |
64 | 218 :param locale: the locale identifier or `Locale` object, or `None` |
219 if the catalog is not bound to a locale (which basically | |
220 means it's a template) | |
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221 :param domain: the message domain |
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222 :param header_comment: the header comment as string, or `None` for the |
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223 default header |
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224 :param project: the project's name |
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225 :param version: the project's version |
104
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226 :param copyright_holder: the copyright holder of the catalog |
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227 :param msgid_bugs_address: the email address or URL to submit bug |
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228 reports to |
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229 :param creation_date: the date the catalog was created |
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230 :param revision_date: the date the catalog was revised |
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231 :param last_translator: the name and email of the last translator |
206
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232 :param language_team: the name and email of the language team |
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233 :param charset: the encoding to use in the output |
175
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234 :param fuzzy: the fuzzy bit on the catalog header |
64 | 235 """ |
107 | 236 self.domain = domain #: The message domain |
64 | 237 if locale: |
238 locale = Locale.parse(locale) | |
107 | 239 self.locale = locale #: The locale or `None` |
104
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240 self._header_comment = header_comment |
67 | 241 self._messages = odict() |
242 | |
107 | 243 self.project = project or 'PROJECT' #: The project name |
244 self.version = version or 'VERSION' #: The project version | |
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245 self.copyright_holder = copyright_holder or 'ORGANIZATION' |
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246 self.msgid_bugs_address = msgid_bugs_address or 'EMAIL@ADDRESS' |
106
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247 |
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248 self.last_translator = last_translator or 'FULL NAME <EMAIL@ADDRESS>' |
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249 """Name and email address of the last translator.""" |
206
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250 self.language_team = language_team or 'LANGUAGE <LL@li.org>' |
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251 """Name and email address of the language team.""" |
106
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252 |
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253 self.charset = charset or 'utf-8' |
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254 |
67 | 255 if creation_date is None: |
97 | 256 creation_date = datetime.now(LOCALTZ) |
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257 elif isinstance(creation_date, datetime) and not creation_date.tzinfo: |
97 | 258 creation_date = creation_date.replace(tzinfo=LOCALTZ) |
107 | 259 self.creation_date = creation_date #: Creation date of the template |
67 | 260 if revision_date is None: |
97 | 261 revision_date = datetime.now(LOCALTZ) |
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262 elif isinstance(revision_date, datetime) and not revision_date.tzinfo: |
97 | 263 revision_date = revision_date.replace(tzinfo=LOCALTZ) |
107 | 264 self.revision_date = revision_date #: Last revision date of the catalog |
181
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265 self.fuzzy = fuzzy #: Catalog header fuzzy bit (`True` or `False`) |
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266 |
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267 self.obsolete = odict() #: Dictionary of obsolete messages |
333
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268 self._num_plurals = None |
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269 self._plural_expr = None |
67 | 270 |
107 | 271 def _get_header_comment(self): |
104
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272 comment = self._header_comment |
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273 comment = comment.replace('PROJECT', self.project) \ |
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274 .replace('VERSION', self.version) \ |
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275 .replace('YEAR', self.revision_date.strftime('%Y')) \ |
120 | 276 .replace('ORGANIZATION', self.copyright_holder) |
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277 if self.locale: |
107 | 278 comment = comment.replace('Translations template', '%s translations' |
279 % self.locale.english_name) | |
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280 return comment |
120 | 281 |
107 | 282 def _set_header_comment(self, string): |
104
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283 self._header_comment = string |
107 | 284 |
285 header_comment = property(_get_header_comment, _set_header_comment, doc="""\ | |
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286 The header comment for the catalog. |
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287 |
104
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288 >>> catalog = Catalog(project='Foobar', version='1.0', |
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289 ... copyright_holder='Foo Company') |
312
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290 >>> print catalog.header_comment #doctest: +ELLIPSIS |
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291 # Translations template for Foobar. |
312
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292 # Copyright (C) ... Foo Company |
104
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293 # This file is distributed under the same license as the Foobar project. |
312
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294 # FIRST AUTHOR <EMAIL@ADDRESS>, .... |
104
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295 # |
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296 |
120 | 297 The header can also be set from a string. Any known upper-case variables |
298 will be replaced when the header is retrieved again: | |
200
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299 |
120 | 300 >>> catalog = Catalog(project='Foobar', version='1.0', |
301 ... copyright_holder='Foo Company') | |
302 >>> catalog.header_comment = '''\\ | |
303 ... # The POT for my really cool PROJECT project. | |
304 ... # Copyright (C) 1990-2003 ORGANIZATION | |
305 ... # This file is distributed under the same license as the PROJECT | |
306 ... # project. | |
307 ... #''' | |
308 >>> print catalog.header_comment | |
309 # The POT for my really cool Foobar project. | |
310 # Copyright (C) 1990-2003 Foo Company | |
311 # This file is distributed under the same license as the Foobar | |
312 # project. | |
313 # | |
314 | |
104
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315 :type: `unicode` |
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316 """) |
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317 |
106
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318 def _get_mime_headers(self): |
67 | 319 headers = [] |
320 headers.append(('Project-Id-Version', | |
321 '%s %s' % (self.project, self.version))) | |
78
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322 headers.append(('Report-Msgid-Bugs-To', self.msgid_bugs_address)) |
67 | 323 headers.append(('POT-Creation-Date', |
131
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324 format_datetime(self.creation_date, 'yyyy-MM-dd HH:mmZ', |
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325 locale='en'))) |
67 | 326 if self.locale is None: |
327 headers.append(('PO-Revision-Date', 'YEAR-MO-DA HO:MI+ZONE')) | |
328 headers.append(('Last-Translator', 'FULL NAME <EMAIL@ADDRESS>')) | |
329 headers.append(('Language-Team', 'LANGUAGE <LL@li.org>')) | |
330 else: | |
331 headers.append(('PO-Revision-Date', | |
131
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332 format_datetime(self.revision_date, |
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333 'yyyy-MM-dd HH:mmZ', locale='en'))) |
67 | 334 headers.append(('Last-Translator', self.last_translator)) |
206
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335 headers.append(('Language-Team', |
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336 self.language_team.replace('LANGUAGE', |
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337 str(self.locale)))) |
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338 headers.append(('Plural-Forms', self.plural_forms)) |
67 | 339 headers.append(('MIME-Version', '1.0')) |
68 | 340 headers.append(('Content-Type', |
341 'text/plain; charset=%s' % self.charset)) | |
67 | 342 headers.append(('Content-Transfer-Encoding', '8bit')) |
105
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343 headers.append(('Generated-By', 'Babel %s\n' % VERSION)) |
67 | 344 return headers |
106
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345 |
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346 def _set_mime_headers(self, headers): |
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347 for name, value in headers: |
545
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348 name = name.lower() |
106
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349 if name == 'project-id-version': |
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350 parts = value.split(' ') |
210
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351 self.project = u' '.join(parts[:-1]) |
106
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352 self.version = parts[-1] |
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353 elif name == 'report-msgid-bugs-to': |
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354 self.msgid_bugs_address = value |
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355 elif name == 'last-translator': |
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356 self.last_translator = value |
206
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357 elif name == 'language-team': |
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358 self.language_team = value |
545
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359 elif name == 'content-type': |
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360 mimetype, params = parse_header(value) |
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361 if 'charset' in params: |
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362 self.charset = params['charset'].lower() |
333
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363 elif name == 'plural-forms': |
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364 _, params = parse_header(' ;' + value) |
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365 self._num_plurals = int(params.get('nplurals', 2)) |
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366 self._plural_expr = params.get('plural', '(n != 1)') |
106
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367 elif name == 'pot-creation-date': |
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368 # FIXME: this should use dates.parse_datetime as soon as that |
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369 # is ready |
427
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370 value, tzoffset, _ = re.split('([+-]\d{4})$', value, 1) |
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371 |
106
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372 tt = time.strptime(value, '%Y-%m-%d %H:%M') |
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373 ts = time.mktime(tt) |
427
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374 |
478 | 375 # Separate the offset into a sign component, hours, and minutes |
427
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376 plus_minus_s, rest = tzoffset[0], tzoffset[1:] |
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377 hours_offset_s, mins_offset_s = rest[:2], rest[2:] |
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378 |
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379 # Make them all integers |
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380 plus_minus = int(plus_minus_s + '1') |
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381 hours_offset = int(hours_offset_s) |
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382 mins_offset = int(mins_offset_s) |
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383 |
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384 # Calculate net offset |
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385 net_mins_offset = hours_offset * 60 |
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386 net_mins_offset += mins_offset |
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387 net_mins_offset *= plus_minus |
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388 |
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389 # Create an offset object |
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390 tzoffset = FixedOffsetTimezone(net_mins_offset) |
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391 |
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392 # Store the offset in a datetime object |
121 | 393 dt = datetime.fromtimestamp(ts) |
394 self.creation_date = dt.replace(tzinfo=tzoffset) | |
422 | 395 elif name == 'po-revision-date': |
396 # Keep the value if it's not the default one | |
397 if 'YEAR' not in value: | |
398 # FIXME: this should use dates.parse_datetime as soon as | |
399 # that is ready | |
427
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400 value, tzoffset, _ = re.split('([+-]\d{4})$', value, 1) |
422 | 401 tt = time.strptime(value, '%Y-%m-%d %H:%M') |
402 ts = time.mktime(tt) | |
427
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403 |
478 | 404 # Separate the offset into a sign component, hours, and |
427
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405 # minutes |
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406 plus_minus_s, rest = tzoffset[0], tzoffset[1:] |
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407 hours_offset_s, mins_offset_s = rest[:2], rest[2:] |
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408 |
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409 # Make them all integers |
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410 plus_minus = int(plus_minus_s + '1') |
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411 hours_offset = int(hours_offset_s) |
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412 mins_offset = int(mins_offset_s) |
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413 |
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414 # Calculate net offset |
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415 net_mins_offset = hours_offset * 60 |
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416 net_mins_offset += mins_offset |
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417 net_mins_offset *= plus_minus |
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418 |
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419 # Create an offset object |
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420 tzoffset = FixedOffsetTimezone(net_mins_offset) |
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421 |
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422 # Store the offset in a datetime object |
422 | 423 dt = datetime.fromtimestamp(ts) |
424 self.revision_date = dt.replace(tzinfo=tzoffset) | |
106
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cmlenz
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425 |
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426 mime_headers = property(_get_mime_headers, _set_mime_headers, doc="""\ |
67 | 427 The MIME headers of the catalog, used for the special ``msgid ""`` entry. |
200
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428 |
67 | 429 The behavior of this property changes slightly depending on whether a locale |
430 is set or not, the latter indicating that the catalog is actually a template | |
431 for actual translations. | |
200
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432 |
67 | 433 Here's an example of the output for such a catalog template: |
200
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434 |
95
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435 >>> created = datetime(1990, 4, 1, 15, 30, tzinfo=UTC) |
67 | 436 >>> catalog = Catalog(project='Foobar', version='1.0', |
95
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437 ... creation_date=created) |
104
395704fda00b
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438 >>> for name, value in catalog.mime_headers: |
67 | 439 ... print '%s: %s' % (name, value) |
440 Project-Id-Version: Foobar 1.0 | |
78
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441 Report-Msgid-Bugs-To: EMAIL@ADDRESS |
67 | 442 POT-Creation-Date: 1990-04-01 15:30+0000 |
443 PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE | |
444 Last-Translator: FULL NAME <EMAIL@ADDRESS> | |
445 Language-Team: LANGUAGE <LL@li.org> | |
446 MIME-Version: 1.0 | |
447 Content-Type: text/plain; charset=utf-8 | |
448 Content-Transfer-Encoding: 8bit | |
449 Generated-By: Babel ... | |
200
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450 |
67 | 451 And here's an example of the output when the locale is set: |
200
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452 |
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453 >>> revised = datetime(1990, 8, 3, 12, 0, tzinfo=UTC) |
67 | 454 >>> catalog = Catalog(locale='de_DE', project='Foobar', version='1.0', |
95
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455 ... creation_date=created, revision_date=revised, |
206
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456 ... last_translator='John Doe <jd@example.com>', |
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457 ... language_team='de_DE <de@example.com>') |
104
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458 >>> for name, value in catalog.mime_headers: |
67 | 459 ... print '%s: %s' % (name, value) |
460 Project-Id-Version: Foobar 1.0 | |
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461 Report-Msgid-Bugs-To: EMAIL@ADDRESS |
67 | 462 POT-Creation-Date: 1990-04-01 15:30+0000 |
463 PO-Revision-Date: 1990-08-03 12:00+0000 | |
464 Last-Translator: John Doe <jd@example.com> | |
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465 Language-Team: de_DE <de@example.com> |
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466 Plural-Forms: nplurals=2; plural=(n != 1) |
67 | 467 MIME-Version: 1.0 |
468 Content-Type: text/plain; charset=utf-8 | |
469 Content-Transfer-Encoding: 8bit | |
470 Generated-By: Babel ... | |
200
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471 |
67 | 472 :type: `list` |
473 """) | |
474 | |
68 | 475 def num_plurals(self): |
373
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476 if self._num_plurals is None: |
333
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477 num = 2 |
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478 if self.locale: |
373
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479 num = get_plural(self.locale)[0] |
333
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480 self._num_plurals = num |
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481 return self._num_plurals |
84
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482 num_plurals = property(num_plurals, doc="""\ |
333
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483 The number of plurals used by the catalog or locale. |
200
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484 |
103
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485 >>> Catalog(locale='en').num_plurals |
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486 2 |
333
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487 >>> Catalog(locale='ga').num_plurals |
103
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488 3 |
200
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489 |
103
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490 :type: `int` |
84
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491 """) |
68 | 492 |
333
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493 def plural_expr(self): |
373
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494 if self._plural_expr is None: |
333
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495 expr = '(n != 1)' |
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496 if self.locale: |
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497 expr = get_plural(self.locale)[1] |
333
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498 self._plural_expr = expr |
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499 return self._plural_expr |
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500 plural_expr = property(plural_expr, doc="""\ |
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501 The plural expression used by the catalog or locale. |
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502 |
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503 >>> Catalog(locale='en').plural_expr |
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504 '(n != 1)' |
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505 >>> Catalog(locale='ga').plural_expr |
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506 '(n==1 ? 0 : n==2 ? 1 : 2)' |
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507 |
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508 :type: `basestring` |
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509 """) |
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510 |
67 | 511 def plural_forms(self): |
333
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512 return 'nplurals=%s; plural=%s' % (self.num_plurals, self.plural_expr) |
67 | 513 plural_forms = property(plural_forms, doc="""\ |
514 Return the plural forms declaration for the locale. | |
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515 |
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516 >>> Catalog(locale='en').plural_forms |
67 | 517 'nplurals=2; plural=(n != 1)' |
518 >>> Catalog(locale='pt_BR').plural_forms | |
519 'nplurals=2; plural=(n > 1)' | |
200
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520 |
67 | 521 :type: `str` |
522 """) | |
523 | |
524 def __contains__(self, id): | |
525 """Return whether the catalog has a message with the specified ID.""" | |
69
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526 return self._key_for(id) in self._messages |
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527 |
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528 def __len__(self): |
84
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529 """The number of messages in the catalog. |
200
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530 |
84
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531 This does not include the special ``msgid ""`` entry. |
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532 """ |
69
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533 return len(self._messages) |
56
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534 |
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535 def __iter__(self): |
64 | 536 """Iterates through all the entries in the catalog, in the order they |
537 were added, yielding a `Message` object for every entry. | |
200
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538 |
64 | 539 :rtype: ``iterator`` |
540 """ | |
67 | 541 buf = [] |
104
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542 for name, value in self.mime_headers: |
67 | 543 buf.append('%s: %s' % (name, value)) |
198
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544 flags = set() |
175
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545 if self.fuzzy: |
198
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546 flags |= set(['fuzzy']) |
210
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547 yield Message(u'', '\n'.join(buf), flags=flags) |
69
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548 for key in self._messages: |
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549 yield self._messages[key] |
56
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550 |
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551 def __repr__(self): |
64 | 552 locale = '' |
553 if self.locale: | |
554 locale = ' %s' % self.locale | |
555 return '<%s %r%s>' % (type(self).__name__, self.domain, locale) | |
56
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556 |
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557 def __delitem__(self, id): |
64 | 558 """Delete the message with the specified ID.""" |
350 | 559 self.delete(id) |
56
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560 |
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561 def __getitem__(self, id): |
64 | 562 """Return the message with the specified ID. |
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563 |
64 | 564 :param id: the message ID |
350 | 565 :return: the message with the specified ID, or `None` if no such |
566 message is in the catalog | |
67 | 567 :rtype: `Message` |
64 | 568 """ |
350 | 569 return self.get(id) |
56
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570 |
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571 def __setitem__(self, id, message): |
64 | 572 """Add or update the message with the specified ID. |
200
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573 |
64 | 574 >>> catalog = Catalog() |
575 >>> catalog[u'foo'] = Message(u'foo') | |
576 >>> catalog[u'foo'] | |
196
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577 <Message u'foo' (flags: [])> |
200
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578 |
64 | 579 If a message with that ID is already in the catalog, it is updated |
580 to include the locations and flags of the new message. | |
200
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581 |
64 | 582 >>> catalog = Catalog() |
583 >>> catalog[u'foo'] = Message(u'foo', locations=[('main.py', 1)]) | |
584 >>> catalog[u'foo'].locations | |
585 [('main.py', 1)] | |
586 >>> catalog[u'foo'] = Message(u'foo', locations=[('utils.py', 5)]) | |
587 >>> catalog[u'foo'].locations | |
588 [('main.py', 1), ('utils.py', 5)] | |
200
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589 |
64 | 590 :param id: the message ID |
591 :param message: the `Message` object | |
592 """ | |
56
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593 assert isinstance(message, Message), 'expected a Message object' |
350 | 594 key = self._key_for(id, message.context) |
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595 current = self._messages.get(key) |
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596 if current: |
69
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597 if message.pluralizable and not current.pluralizable: |
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598 # The new message adds pluralization |
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599 current.id = message.id |
70
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600 current.string = message.string |
229 | 601 current.locations = list(distinct(current.locations + |
602 message.locations)) | |
228
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603 current.auto_comments = list(distinct(current.auto_comments + |
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604 message.auto_comments)) |
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605 current.user_comments = list(distinct(current.user_comments + |
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606 message.user_comments)) |
56
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607 current.flags |= message.flags |
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608 message = current |
106
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609 elif id == '': |
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610 # special treatment for the header message |
545
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611 def _parse_header(header_string): |
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diff
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612 # message_from_string only works for str, not for unicode |
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613 headers = message_from_string(header_string.encode('utf8')) |
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614 decoded_headers = {} |
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615 for name, value in headers.items(): |
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616 name = name.decode('utf8') |
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617 value = value.decode('utf8') |
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618 decoded_headers[name] = value |
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619 return decoded_headers |
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620 self.mime_headers = _parse_header(message.string).items() |
120 | 621 self.header_comment = '\n'.join(['# %s' % comment for comment |
622 in message.user_comments]) | |
196
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623 self.fuzzy = message.fuzzy |
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624 else: |
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625 if isinstance(id, (list, tuple)): |
277
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626 assert isinstance(message.string, (list, tuple)), \ |
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627 'Expected sequence but got %s' % type(message.string) |
69
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628 self._messages[key] = message |
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629 |
105
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630 def add(self, id, string=None, locations=(), flags=(), auto_comments=(), |
335 | 631 user_comments=(), previous_id=(), lineno=None, context=None): |
64 | 632 """Add or update the message with the specified ID. |
200
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633 |
64 | 634 >>> catalog = Catalog() |
635 >>> catalog.add(u'foo') | |
544
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636 <Message ...> |
64 | 637 >>> catalog[u'foo'] |
196
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638 <Message u'foo' (flags: [])> |
200
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639 |
64 | 640 This method simply constructs a `Message` object with the given |
641 arguments and invokes `__setitem__` with that object. | |
200
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642 |
64 | 643 :param id: the message ID, or a ``(singular, plural)`` tuple for |
644 pluralizable messages | |
645 :param string: the translated message string, or a | |
646 ``(singular, plural)`` tuple for pluralizable messages | |
647 :param locations: a sequence of ``(filenname, lineno)`` tuples | |
648 :param flags: a set or sequence of flags | |
106
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649 :param auto_comments: a sequence of automatic comments |
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650 :param user_comments: a sequence of user comments |
203 | 651 :param previous_id: the previous message ID, or a ``(singular, plural)`` |
652 tuple for pluralizable messages | |
220
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653 :param lineno: the line number on which the msgid line was found in the |
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654 PO file, if any |
335 | 655 :param context: the message context |
544
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656 :return: the newly added message |
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657 :rtype: `Message` |
64 | 658 """ |
544
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659 message = Message(id, string, list(locations), flags, auto_comments, |
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660 user_comments, previous_id, lineno=lineno, |
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661 context=context) |
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662 self[id] = message |
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663 return message |
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664 |
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665 def check(self): |
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666 """Run various validation checks on the translations in the catalog. |
226 | 667 |
220
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668 For every message which fails validation, this method yield a |
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669 ``(message, errors)`` tuple, where ``message`` is the `Message` object |
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670 and ``errors`` is a sequence of `TranslationError` objects. |
226 | 671 |
220
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672 :rtype: ``iterator`` |
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673 """ |
352
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674 for message in self._messages.values(): |
355
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675 errors = message.check(catalog=self) |
352
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676 if errors: |
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677 yield message, errors |
69
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678 |
350 | 679 def get(self, id, context=None): |
680 """Return the message with the specified ID and context. | |
681 | |
682 :param id: the message ID | |
683 :param context: the message context, or ``None`` for no context | |
684 :return: the message with the specified ID, or `None` if no such | |
685 message is in the catalog | |
686 :rtype: `Message` | |
687 """ | |
688 return self._messages.get(self._key_for(id, context)) | |
689 | |
690 def delete(self, id, context=None): | |
691 """Delete the message with the specified ID and context. | |
692 | |
693 :param id: the message ID | |
694 :param context: the message context, or ``None`` for no context | |
695 """ | |
696 key = self._key_for(id, context) | |
697 if key in self._messages: | |
698 del self._messages[key] | |
699 | |
203 | 700 def update(self, template, no_fuzzy_matching=False): |
163
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701 """Update the catalog based on the given template catalog. |
200
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702 |
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703 >>> from babel.messages import Catalog |
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704 >>> template = Catalog() |
188 | 705 >>> template.add('green', locations=[('main.py', 99)]) |
544
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706 <Message ...> |
163
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707 >>> template.add('blue', locations=[('main.py', 100)]) |
544
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708 <Message ...> |
163
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709 >>> template.add(('salad', 'salads'), locations=[('util.py', 42)]) |
544
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710 <Message ...> |
163
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711 >>> catalog = Catalog(locale='de_DE') |
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712 >>> catalog.add('blue', u'blau', locations=[('main.py', 98)]) |
544
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713 <Message ...> |
163
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714 >>> catalog.add('head', u'Kopf', locations=[('util.py', 33)]) |
544
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715 <Message ...> |
163
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716 >>> catalog.add(('salad', 'salads'), (u'Salat', u'Salate'), |
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717 ... locations=[('util.py', 38)]) |
544
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718 <Message ...> |
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719 |
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720 >>> catalog.update(template) |
163
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721 >>> len(catalog) |
188 | 722 3 |
200
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723 |
188 | 724 >>> msg1 = catalog['green'] |
163
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725 >>> msg1.string |
188 | 726 >>> msg1.locations |
727 [('main.py', 99)] | |
200
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728 |
188 | 729 >>> msg2 = catalog['blue'] |
730 >>> msg2.string | |
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731 u'blau' |
188 | 732 >>> msg2.locations |
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733 [('main.py', 100)] |
200
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734 |
188 | 735 >>> msg3 = catalog['salad'] |
736 >>> msg3.string | |
163
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737 (u'Salat', u'Salate') |
188 | 738 >>> msg3.locations |
163
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739 [('util.py', 42)] |
200
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740 |
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741 Messages that are in the catalog but not in the template are removed |
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742 from the main collection, but can still be accessed via the `obsolete` |
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743 member: |
200
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744 |
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745 >>> 'head' in catalog |
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746 False |
181
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747 >>> catalog.obsolete.values() |
196
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748 [<Message 'head' (flags: [])>] |
200
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749 |
163
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750 :param template: the reference catalog, usually read from a POT file |
200
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751 :param no_fuzzy_matching: whether to use fuzzy matching of message IDs |
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752 """ |
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753 messages = self._messages |
312
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754 remaining = messages.copy() |
163
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755 self._messages = odict() |
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756 |
312
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757 # Prepare for fuzzy matching |
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|
758 fuzzy_candidates = [] |
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759 if not no_fuzzy_matching: |
350 | 760 fuzzy_candidates = dict([ |
761 (self._key_for(msgid), messages[msgid].context) | |
762 for msgid in messages if msgid and messages[msgid].string | |
763 ]) | |
312
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764 fuzzy_matches = set() |
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765 |
277
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766 def _merge(message, oldkey, newkey): |
313
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Merging catalogs would sometimes mix translations from different runs.
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767 message = message.clone() |
277
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768 fuzzy = False |
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769 if oldkey != newkey: |
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|
770 fuzzy = True |
312
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|
771 fuzzy_matches.add(oldkey) |
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772 oldmsg = messages.get(oldkey) |
277
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773 if isinstance(oldmsg.id, basestring): |
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774 message.previous_id = [oldmsg.id] |
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775 else: |
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776 message.previous_id = list(oldmsg.id) |
312
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777 else: |
337
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Fix iterkeys/iteritems/itervalues/pop/popitem methods on the `odict` utility class. Thanks to Armin Ronacher for the patch.
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|
778 oldmsg = remaining.pop(oldkey, None) |
277
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779 message.string = oldmsg.string |
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780 if isinstance(message.id, (list, tuple)): |
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781 if not isinstance(message.string, (list, tuple)): |
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782 fuzzy = True |
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783 message.string = tuple( |
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784 [message.string] + ([u''] * (len(message.id) - 1)) |
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785 ) |
425
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786 elif len(message.string) != self.num_plurals: |
277
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787 fuzzy = True |
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788 message.string = tuple(message.string[:len(oldmsg.string)]) |
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789 elif isinstance(message.string, (list, tuple)): |
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790 fuzzy = True |
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791 message.string = message.string[0] |
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792 message.flags |= oldmsg.flags |
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|
793 if fuzzy: |
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794 message.flags |= set([u'fuzzy']) |
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795 self[message.id] = message |
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796 |
163
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|
797 for message in template: |
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798 if message.id: |
350 | 799 key = self._key_for(message.id, message.context) |
163
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800 if key in messages: |
277
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|
801 _merge(message, key, key) |
163
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802 else: |
200
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803 if no_fuzzy_matching is False: |
165
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804 # do some fuzzy matching with difflib |
350 | 805 if isinstance(key, tuple): |
806 matchkey = key[0] # just the msgid, no context | |
807 else: | |
808 matchkey = key | |
809 matches = get_close_matches(matchkey.lower().strip(), | |
810 fuzzy_candidates.keys(), 1) | |
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811 if matches: |
350 | 812 newkey = matches[0] |
813 newctxt = fuzzy_candidates[newkey] | |
814 if newctxt is not None: | |
815 newkey = newkey, newctxt | |
816 _merge(message, newkey, key) | |
188 | 817 continue |
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818 |
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819 self[message.id] = message |
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820 |
312
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821 self.obsolete = odict() |
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822 for msgid in remaining: |
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823 if no_fuzzy_matching or msgid not in fuzzy_matches: |
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824 self.obsolete[msgid] = remaining[msgid] |
418
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825 # Make updated catalog's POT-Creation-Date equal to the template |
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826 # used to update the catalog |
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827 self.creation_date = template.creation_date |
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828 |
350 | 829 def _key_for(self, id, context=None): |
69
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Message catalogs can have multiple messages with the same ID, where some of them have plural strings, and others don't. Still the same message.
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830 """The key for a message is just the singular ID even for pluralizable |
350 | 831 messages, but is a ``(msgid, msgctxt)`` tuple for context-specific |
69
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832 messages. |
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833 """ |
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834 key = id |
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835 if isinstance(key, (list, tuple)): |
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836 key = id[0] |
350 | 837 if context is not None: |
838 key = (key, context) | |
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839 return key |