646 lines
22 KiB
Python
646 lines
22 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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babel.messages.pofile
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~~~~~~~~~~~~~~~~~~~~~
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Reading and writing of files in the ``gettext`` PO (portable object)
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format.
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:copyright: (c) 2013-2021 by the Babel Team.
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:license: BSD, see LICENSE for more details.
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"""
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from __future__ import print_function
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import os
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import re
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from babel.messages.catalog import Catalog, Message
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from babel.util import wraptext
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from babel._compat import text_type, cmp
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def unescape(string):
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r"""Reverse `escape` the given string.
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>>> print(unescape('"Say:\\n \\"hello, world!\\"\\n"'))
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Say:
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"hello, world!"
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<BLANKLINE>
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:param string: the string to unescape
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"""
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def replace_escapes(match):
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m = match.group(1)
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if m == 'n':
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return '\n'
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elif m == 't':
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return '\t'
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elif m == 'r':
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return '\r'
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# m is \ or "
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return m
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return re.compile(r'\\([\\trn"])').sub(replace_escapes, string[1:-1])
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def denormalize(string):
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r"""Reverse the normalization done by the `normalize` function.
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>>> print(denormalize(r'''""
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... "Say:\n"
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... " \"hello, world!\"\n"'''))
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Say:
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"hello, world!"
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<BLANKLINE>
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>>> print(denormalize(r'''""
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... "Say:\n"
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... " \"Lorem ipsum dolor sit "
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... "amet, consectetur adipisicing"
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... " elit, \"\n"'''))
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Say:
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"Lorem ipsum dolor sit amet, consectetur adipisicing elit, "
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<BLANKLINE>
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:param string: the string to denormalize
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"""
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if '\n' in string:
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escaped_lines = string.splitlines()
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if string.startswith('""'):
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escaped_lines = escaped_lines[1:]
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lines = map(unescape, escaped_lines)
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return ''.join(lines)
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else:
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return unescape(string)
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class PoFileError(Exception):
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"""Exception thrown by PoParser when an invalid po file is encountered."""
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def __init__(self, message, catalog, line, lineno):
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super(PoFileError, self).__init__('{message} on {lineno}'.format(message=message, lineno=lineno))
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self.catalog = catalog
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self.line = line
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self.lineno = lineno
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class _NormalizedString(object):
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def __init__(self, *args):
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self._strs = []
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for arg in args:
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self.append(arg)
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def append(self, s):
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self._strs.append(s.strip())
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def denormalize(self):
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return ''.join(map(unescape, self._strs))
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def __nonzero__(self):
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return bool(self._strs)
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__bool__ = __nonzero__
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def __repr__(self):
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return os.linesep.join(self._strs)
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def __cmp__(self, other):
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if not other:
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return 1
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return cmp(text_type(self), text_type(other))
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def __gt__(self, other):
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return self.__cmp__(other) > 0
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def __lt__(self, other):
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return self.__cmp__(other) < 0
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def __ge__(self, other):
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return self.__cmp__(other) >= 0
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def __le__(self, other):
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return self.__cmp__(other) <= 0
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def __eq__(self, other):
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return self.__cmp__(other) == 0
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def __ne__(self, other):
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return self.__cmp__(other) != 0
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class PoFileParser(object):
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"""Support class to read messages from a ``gettext`` PO (portable object) file
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and add them to a `Catalog`
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See `read_po` for simple cases.
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"""
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_keywords = [
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'msgid',
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'msgstr',
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'msgctxt',
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'msgid_plural',
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]
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def __init__(self, catalog, ignore_obsolete=False, abort_invalid=False):
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self.catalog = catalog
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self.ignore_obsolete = ignore_obsolete
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self.counter = 0
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self.offset = 0
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self.abort_invalid = abort_invalid
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self._reset_message_state()
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def _reset_message_state(self):
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self.messages = []
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self.translations = []
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self.locations = []
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self.flags = []
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self.user_comments = []
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self.auto_comments = []
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self.context = None
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self.obsolete = False
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self.in_msgid = False
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self.in_msgstr = False
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self.in_msgctxt = False
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def _add_message(self):
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"""
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Add a message to the catalog based on the current parser state and
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clear the state ready to process the next message.
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"""
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self.translations.sort()
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if len(self.messages) > 1:
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msgid = tuple([m.denormalize() for m in self.messages])
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else:
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msgid = self.messages[0].denormalize()
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if isinstance(msgid, (list, tuple)):
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string = ['' for _ in range(self.catalog.num_plurals)]
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for idx, translation in self.translations:
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if idx >= self.catalog.num_plurals:
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self._invalid_pofile(u"", self.offset, "msg has more translations than num_plurals of catalog")
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continue
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string[idx] = translation.denormalize()
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string = tuple(string)
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else:
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string = self.translations[0][1].denormalize()
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if self.context:
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msgctxt = self.context.denormalize()
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else:
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msgctxt = None
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message = Message(msgid, string, list(self.locations), set(self.flags),
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self.auto_comments, self.user_comments, lineno=self.offset + 1,
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context=msgctxt)
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if self.obsolete:
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if not self.ignore_obsolete:
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self.catalog.obsolete[msgid] = message
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else:
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self.catalog[msgid] = message
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self.counter += 1
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self._reset_message_state()
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def _finish_current_message(self):
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if self.messages:
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self._add_message()
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def _process_message_line(self, lineno, line, obsolete=False):
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if line.startswith('"'):
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self._process_string_continuation_line(line, lineno)
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else:
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self._process_keyword_line(lineno, line, obsolete)
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def _process_keyword_line(self, lineno, line, obsolete=False):
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for keyword in self._keywords:
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try:
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if line.startswith(keyword) and line[len(keyword)] in [' ', '[']:
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arg = line[len(keyword):]
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break
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except IndexError:
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self._invalid_pofile(line, lineno, "Keyword must be followed by a string")
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else:
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self._invalid_pofile(line, lineno, "Start of line didn't match any expected keyword.")
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return
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if keyword in ['msgid', 'msgctxt']:
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self._finish_current_message()
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self.obsolete = obsolete
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# The line that has the msgid is stored as the offset of the msg
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# should this be the msgctxt if it has one?
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if keyword == 'msgid':
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self.offset = lineno
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if keyword in ['msgid', 'msgid_plural']:
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self.in_msgctxt = False
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self.in_msgid = True
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self.messages.append(_NormalizedString(arg))
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elif keyword == 'msgstr':
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self.in_msgid = False
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self.in_msgstr = True
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if arg.startswith('['):
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idx, msg = arg[1:].split(']', 1)
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self.translations.append([int(idx), _NormalizedString(msg)])
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else:
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self.translations.append([0, _NormalizedString(arg)])
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elif keyword == 'msgctxt':
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self.in_msgctxt = True
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self.context = _NormalizedString(arg)
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def _process_string_continuation_line(self, line, lineno):
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if self.in_msgid:
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s = self.messages[-1]
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elif self.in_msgstr:
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s = self.translations[-1][1]
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elif self.in_msgctxt:
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s = self.context
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else:
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self._invalid_pofile(line, lineno, "Got line starting with \" but not in msgid, msgstr or msgctxt")
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return
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s.append(line)
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def _process_comment(self, line):
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self._finish_current_message()
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if line[1:].startswith(':'):
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for location in line[2:].lstrip().split():
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pos = location.rfind(':')
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if pos >= 0:
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try:
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lineno = int(location[pos + 1:])
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except ValueError:
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continue
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self.locations.append((location[:pos], lineno))
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else:
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self.locations.append((location, None))
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elif line[1:].startswith(','):
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for flag in line[2:].lstrip().split(','):
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self.flags.append(flag.strip())
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elif line[1:].startswith('.'):
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# These are called auto-comments
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comment = line[2:].strip()
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if comment: # Just check that we're not adding empty comments
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self.auto_comments.append(comment)
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else:
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# These are called user comments
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self.user_comments.append(line[1:].strip())
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def parse(self, fileobj):
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"""
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Reads from the file-like object `fileobj` and adds any po file
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units found in it to the `Catalog` supplied to the constructor.
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"""
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for lineno, line in enumerate(fileobj):
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line = line.strip()
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if not isinstance(line, text_type):
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line = line.decode(self.catalog.charset)
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if not line:
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continue
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if line.startswith('#'):
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if line[1:].startswith('~'):
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self._process_message_line(lineno, line[2:].lstrip(), obsolete=True)
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else:
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self._process_comment(line)
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else:
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self._process_message_line(lineno, line)
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self._finish_current_message()
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# No actual messages found, but there was some info in comments, from which
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# we'll construct an empty header message
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if not self.counter and (self.flags or self.user_comments or self.auto_comments):
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self.messages.append(_NormalizedString(u'""'))
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self.translations.append([0, _NormalizedString(u'""')])
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self._add_message()
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def _invalid_pofile(self, line, lineno, msg):
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assert isinstance(line, text_type)
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if self.abort_invalid:
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raise PoFileError(msg, self.catalog, line, lineno)
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print("WARNING:", msg)
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# `line` is guaranteed to be unicode so u"{}"-interpolating would always
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# succeed, but on Python < 2 if not in a TTY, `sys.stdout.encoding`
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# is `None`, unicode may not be printable so we `repr()` to ASCII.
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print(u"WARNING: Problem on line {0}: {1}".format(lineno + 1, repr(line)))
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def read_po(fileobj, locale=None, domain=None, ignore_obsolete=False, charset=None, abort_invalid=False):
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"""Read messages from a ``gettext`` PO (portable object) file from the given
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file-like object and return a `Catalog`.
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>>> from datetime import datetime
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>>> from babel._compat import StringIO
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>>> buf = StringIO('''
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... #: main.py:1
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... #, fuzzy, python-format
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... msgid "foo %(name)s"
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... msgstr "quux %(name)s"
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...
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... # A user comment
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... #. An auto comment
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... #: main.py:3
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... msgid "bar"
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... msgid_plural "baz"
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... msgstr[0] "bar"
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... msgstr[1] "baaz"
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... ''')
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>>> catalog = read_po(buf)
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>>> catalog.revision_date = datetime(2007, 4, 1)
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>>> for message in catalog:
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... if message.id:
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... print((message.id, message.string))
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... print(' ', (message.locations, sorted(list(message.flags))))
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... print(' ', (message.user_comments, message.auto_comments))
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(u'foo %(name)s', u'quux %(name)s')
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([(u'main.py', 1)], [u'fuzzy', u'python-format'])
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([], [])
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((u'bar', u'baz'), (u'bar', u'baaz'))
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([(u'main.py', 3)], [])
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([u'A user comment'], [u'An auto comment'])
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.. versionadded:: 1.0
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Added support for explicit charset argument.
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:param fileobj: the file-like object to read the PO file from
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:param locale: the locale identifier or `Locale` object, or `None`
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if the catalog is not bound to a locale (which basically
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means it's a template)
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:param domain: the message domain
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:param ignore_obsolete: whether to ignore obsolete messages in the input
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:param charset: the character set of the catalog.
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:param abort_invalid: abort read if po file is invalid
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"""
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catalog = Catalog(locale=locale, domain=domain, charset=charset)
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parser = PoFileParser(catalog, ignore_obsolete, abort_invalid=abort_invalid)
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|
|
parser.parse(fileobj)
|
||
|
|
return catalog
|
||
|
|
|
||
|
|
|
||
|
|
WORD_SEP = re.compile('('
|
||
|
|
r'\s+|' # any whitespace
|
||
|
|
r'[^\s\w]*\w+[a-zA-Z]-(?=\w+[a-zA-Z])|' # hyphenated words
|
||
|
|
r'(?<=[\w\!\"\'\&\.\,\?])-{2,}(?=\w)' # em-dash
|
||
|
|
')')
|
||
|
|
|
||
|
|
|
||
|
|
def escape(string):
|
||
|
|
r"""Escape the given string so that it can be included in double-quoted
|
||
|
|
strings in ``PO`` files.
|
||
|
|
|
||
|
|
>>> escape('''Say:
|
||
|
|
... "hello, world!"
|
||
|
|
... ''')
|
||
|
|
'"Say:\\n \\"hello, world!\\"\\n"'
|
||
|
|
|
||
|
|
:param string: the string to escape
|
||
|
|
"""
|
||
|
|
return '"%s"' % string.replace('\\', '\\\\') \
|
||
|
|
.replace('\t', '\\t') \
|
||
|
|
.replace('\r', '\\r') \
|
||
|
|
.replace('\n', '\\n') \
|
||
|
|
.replace('\"', '\\"')
|
||
|
|
|
||
|
|
|
||
|
|
def normalize(string, prefix='', width=76):
|
||
|
|
r"""Convert a string into a format that is appropriate for .po files.
|
||
|
|
|
||
|
|
>>> print(normalize('''Say:
|
||
|
|
... "hello, world!"
|
||
|
|
... ''', width=None))
|
||
|
|
""
|
||
|
|
"Say:\n"
|
||
|
|
" \"hello, world!\"\n"
|
||
|
|
|
||
|
|
>>> print(normalize('''Say:
|
||
|
|
... "Lorem ipsum dolor sit amet, consectetur adipisicing elit, "
|
||
|
|
... ''', width=32))
|
||
|
|
""
|
||
|
|
"Say:\n"
|
||
|
|
" \"Lorem ipsum dolor sit "
|
||
|
|
"amet, consectetur adipisicing"
|
||
|
|
" elit, \"\n"
|
||
|
|
|
||
|
|
:param string: the string to normalize
|
||
|
|
:param prefix: a string that should be prepended to every line
|
||
|
|
:param width: the maximum line width; use `None`, 0, or a negative number
|
||
|
|
to completely disable line wrapping
|
||
|
|
"""
|
||
|
|
if width and width > 0:
|
||
|
|
prefixlen = len(prefix)
|
||
|
|
lines = []
|
||
|
|
for line in string.splitlines(True):
|
||
|
|
if len(escape(line)) + prefixlen > width:
|
||
|
|
chunks = WORD_SEP.split(line)
|
||
|
|
chunks.reverse()
|
||
|
|
while chunks:
|
||
|
|
buf = []
|
||
|
|
size = 2
|
||
|
|
while chunks:
|
||
|
|
l = len(escape(chunks[-1])) - 2 + prefixlen
|
||
|
|
if size + l < width:
|
||
|
|
buf.append(chunks.pop())
|
||
|
|
size += l
|
||
|
|
else:
|
||
|
|
if not buf:
|
||
|
|
# handle long chunks by putting them on a
|
||
|
|
# separate line
|
||
|
|
buf.append(chunks.pop())
|
||
|
|
break
|
||
|
|
lines.append(u''.join(buf))
|
||
|
|
else:
|
||
|
|
lines.append(line)
|
||
|
|
else:
|
||
|
|
lines = string.splitlines(True)
|
||
|
|
|
||
|
|
if len(lines) <= 1:
|
||
|
|
return escape(string)
|
||
|
|
|
||
|
|
# Remove empty trailing line
|
||
|
|
if lines and not lines[-1]:
|
||
|
|
del lines[-1]
|
||
|
|
lines[-1] += '\n'
|
||
|
|
return u'""\n' + u'\n'.join([(prefix + escape(line)) for line in lines])
|
||
|
|
|
||
|
|
|
||
|
|
def write_po(fileobj, catalog, width=76, no_location=False, omit_header=False,
|
||
|
|
sort_output=False, sort_by_file=False, ignore_obsolete=False,
|
||
|
|
include_previous=False, include_lineno=True):
|
||
|
|
r"""Write a ``gettext`` PO (portable object) template file for a given
|
||
|
|
message catalog to the provided file-like object.
|
||
|
|
|
||
|
|
>>> catalog = Catalog()
|
||
|
|
>>> catalog.add(u'foo %(name)s', locations=[('main.py', 1)],
|
||
|
|
... flags=('fuzzy',))
|
||
|
|
<Message...>
|
||
|
|
>>> catalog.add((u'bar', u'baz'), locations=[('main.py', 3)])
|
||
|
|
<Message...>
|
||
|
|
>>> from babel._compat import BytesIO
|
||
|
|
>>> buf = BytesIO()
|
||
|
|
>>> write_po(buf, catalog, omit_header=True)
|
||
|
|
>>> print(buf.getvalue().decode("utf8"))
|
||
|
|
#: main.py:1
|
||
|
|
#, fuzzy, python-format
|
||
|
|
msgid "foo %(name)s"
|
||
|
|
msgstr ""
|
||
|
|
<BLANKLINE>
|
||
|
|
#: main.py:3
|
||
|
|
msgid "bar"
|
||
|
|
msgid_plural "baz"
|
||
|
|
msgstr[0] ""
|
||
|
|
msgstr[1] ""
|
||
|
|
<BLANKLINE>
|
||
|
|
<BLANKLINE>
|
||
|
|
|
||
|
|
:param fileobj: the file-like object to write to
|
||
|
|
:param catalog: the `Catalog` instance
|
||
|
|
:param width: the maximum line width for the generated output; use `None`,
|
||
|
|
0, or a negative number to completely disable line wrapping
|
||
|
|
:param no_location: do not emit a location comment for every message
|
||
|
|
:param omit_header: do not include the ``msgid ""`` entry at the top of the
|
||
|
|
output
|
||
|
|
:param sort_output: whether to sort the messages in the output by msgid
|
||
|
|
:param sort_by_file: whether to sort the messages in the output by their
|
||
|
|
locations
|
||
|
|
:param ignore_obsolete: whether to ignore obsolete messages and not include
|
||
|
|
them in the output; by default they are included as
|
||
|
|
comments
|
||
|
|
:param include_previous: include the old msgid as a comment when
|
||
|
|
updating the catalog
|
||
|
|
:param include_lineno: include line number in the location comment
|
||
|
|
"""
|
||
|
|
def _normalize(key, prefix=''):
|
||
|
|
return normalize(key, prefix=prefix, width=width)
|
||
|
|
|
||
|
|
def _write(text):
|
||
|
|
if isinstance(text, text_type):
|
||
|
|
text = text.encode(catalog.charset, 'backslashreplace')
|
||
|
|
fileobj.write(text)
|
||
|
|
|
||
|
|
def _write_comment(comment, prefix=''):
|
||
|
|
# xgettext always wraps comments even if --no-wrap is passed;
|
||
|
|
# provide the same behaviour
|
||
|
|
if width and width > 0:
|
||
|
|
_width = width
|
||
|
|
else:
|
||
|
|
_width = 76
|
||
|
|
for line in wraptext(comment, _width):
|
||
|
|
_write('#%s %s\n' % (prefix, line.strip()))
|
||
|
|
|
||
|
|
def _write_message(message, prefix=''):
|
||
|
|
if isinstance(message.id, (list, tuple)):
|
||
|
|
if message.context:
|
||
|
|
_write('%smsgctxt %s\n' % (prefix,
|
||
|
|
_normalize(message.context, prefix)))
|
||
|
|
_write('%smsgid %s\n' % (prefix, _normalize(message.id[0], prefix)))
|
||
|
|
_write('%smsgid_plural %s\n' % (
|
||
|
|
prefix, _normalize(message.id[1], prefix)
|
||
|
|
))
|
||
|
|
|
||
|
|
for idx in range(catalog.num_plurals):
|
||
|
|
try:
|
||
|
|
string = message.string[idx]
|
||
|
|
except IndexError:
|
||
|
|
string = ''
|
||
|
|
_write('%smsgstr[%d] %s\n' % (
|
||
|
|
prefix, idx, _normalize(string, prefix)
|
||
|
|
))
|
||
|
|
else:
|
||
|
|
if message.context:
|
||
|
|
_write('%smsgctxt %s\n' % (prefix,
|
||
|
|
_normalize(message.context, prefix)))
|
||
|
|
_write('%smsgid %s\n' % (prefix, _normalize(message.id, prefix)))
|
||
|
|
_write('%smsgstr %s\n' % (
|
||
|
|
prefix, _normalize(message.string or '', prefix)
|
||
|
|
))
|
||
|
|
|
||
|
|
sort_by = None
|
||
|
|
if sort_output:
|
||
|
|
sort_by = "message"
|
||
|
|
elif sort_by_file:
|
||
|
|
sort_by = "location"
|
||
|
|
|
||
|
|
for message in _sort_messages(catalog, sort_by=sort_by):
|
||
|
|
if not message.id: # This is the header "message"
|
||
|
|
if omit_header:
|
||
|
|
continue
|
||
|
|
comment_header = catalog.header_comment
|
||
|
|
if width and width > 0:
|
||
|
|
lines = []
|
||
|
|
for line in comment_header.splitlines():
|
||
|
|
lines += wraptext(line, width=width,
|
||
|
|
subsequent_indent='# ')
|
||
|
|
comment_header = u'\n'.join(lines)
|
||
|
|
_write(comment_header + u'\n')
|
||
|
|
|
||
|
|
for comment in message.user_comments:
|
||
|
|
_write_comment(comment)
|
||
|
|
for comment in message.auto_comments:
|
||
|
|
_write_comment(comment, prefix='.')
|
||
|
|
|
||
|
|
if not no_location:
|
||
|
|
locs = []
|
||
|
|
|
||
|
|
# sort locations by filename and lineno.
|
||
|
|
# if there's no <int> as lineno, use `-1`.
|
||
|
|
# if no sorting possible, leave unsorted.
|
||
|
|
# (see issue #606)
|
||
|
|
try:
|
||
|
|
locations = sorted(message.locations,
|
||
|
|
key=lambda x: (x[0], isinstance(x[1], int) and x[1] or -1))
|
||
|
|
except TypeError: # e.g. "TypeError: unorderable types: NoneType() < int()"
|
||
|
|
locations = message.locations
|
||
|
|
|
||
|
|
for filename, lineno in locations:
|
||
|
|
if lineno and include_lineno:
|
||
|
|
locs.append(u'%s:%d' % (filename.replace(os.sep, '/'), lineno))
|
||
|
|
else:
|
||
|
|
locs.append(u'%s' % filename.replace(os.sep, '/'))
|
||
|
|
_write_comment(' '.join(locs), prefix=':')
|
||
|
|
if message.flags:
|
||
|
|
_write('#%s\n' % ', '.join([''] + sorted(message.flags)))
|
||
|
|
|
||
|
|
if message.previous_id and include_previous:
|
||
|
|
_write_comment('msgid %s' % _normalize(message.previous_id[0]),
|
||
|
|
prefix='|')
|
||
|
|
if len(message.previous_id) > 1:
|
||
|
|
_write_comment('msgid_plural %s' % _normalize(
|
||
|
|
message.previous_id[1]
|
||
|
|
), prefix='|')
|
||
|
|
|
||
|
|
_write_message(message)
|
||
|
|
_write('\n')
|
||
|
|
|
||
|
|
if not ignore_obsolete:
|
||
|
|
for message in _sort_messages(
|
||
|
|
catalog.obsolete.values(),
|
||
|
|
sort_by=sort_by
|
||
|
|
):
|
||
|
|
for comment in message.user_comments:
|
||
|
|
_write_comment(comment)
|
||
|
|
_write_message(message, prefix='#~ ')
|
||
|
|
_write('\n')
|
||
|
|
|
||
|
|
|
||
|
|
def _sort_messages(messages, sort_by):
|
||
|
|
"""
|
||
|
|
Sort the given message iterable by the given criteria.
|
||
|
|
|
||
|
|
Always returns a list.
|
||
|
|
|
||
|
|
:param messages: An iterable of Messages.
|
||
|
|
:param sort_by: Sort by which criteria? Options are `message` and `location`.
|
||
|
|
:return: list[Message]
|
||
|
|
"""
|
||
|
|
messages = list(messages)
|
||
|
|
if sort_by == "message":
|
||
|
|
messages.sort()
|
||
|
|
elif sort_by == "location":
|
||
|
|
messages.sort(key=lambda m: m.locations)
|
||
|
|
return messages
|