1001 lines
37 KiB
Python
1001 lines
37 KiB
Python
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"""
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babel.messages.catalog
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~~~~~~~~~~~~~~~~~~~~~~
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Data structures for message catalogs.
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:copyright: (c) 2013-2025 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 annotations
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import datetime
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import re
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from collections.abc import Iterable, Iterator
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from copy import copy
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from difflib import SequenceMatcher
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from email import message_from_string
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from heapq import nlargest
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from string import Formatter
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from typing import TYPE_CHECKING
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from babel import __version__ as VERSION
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from babel.core import Locale, UnknownLocaleError
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from babel.dates import format_datetime
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from babel.messages.plurals import get_plural
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from babel.util import LOCALTZ, FixedOffsetTimezone, _cmp, distinct
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if TYPE_CHECKING:
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from typing_extensions import TypeAlias
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_MessageID: TypeAlias = str | tuple[str, ...] | list[str]
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__all__ = [
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'DEFAULT_HEADER',
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'PYTHON_FORMAT',
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'Catalog',
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'Message',
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'TranslationError',
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]
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def get_close_matches(word, possibilities, n=3, cutoff=0.6):
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"""A modified version of ``difflib.get_close_matches``.
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It just passes ``autojunk=False`` to the ``SequenceMatcher``, to work
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around https://github.com/python/cpython/issues/90825.
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"""
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if not n > 0: # pragma: no cover
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raise ValueError(f"n must be > 0: {n!r}")
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if not 0.0 <= cutoff <= 1.0: # pragma: no cover
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raise ValueError(f"cutoff must be in [0.0, 1.0]: {cutoff!r}")
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result = []
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s = SequenceMatcher(autojunk=False) # only line changed from difflib.py
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s.set_seq2(word)
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for x in possibilities:
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s.set_seq1(x)
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if s.real_quick_ratio() >= cutoff and \
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s.quick_ratio() >= cutoff and \
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s.ratio() >= cutoff:
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result.append((s.ratio(), x))
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# Move the best scorers to head of list
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result = nlargest(n, result)
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# Strip scores for the best n matches
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return [x for score, x in result]
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PYTHON_FORMAT = re.compile(r'''
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\%
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(?:\(([\w]*)\))?
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(
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[-#0\ +]?(?:\*|[\d]+)?
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(?:\.(?:\*|[\d]+))?
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[hlL]?
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)
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([diouxXeEfFgGcrs%])
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''', re.VERBOSE)
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def _has_python_brace_format(string: str) -> bool:
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if "{" not in string:
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return False
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fmt = Formatter()
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try:
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# `fmt.parse` returns 3-or-4-tuples of the form
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# `(literal_text, field_name, format_spec, conversion)`;
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# if `field_name` is set, this smells like brace format
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field_name_seen = False
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for t in fmt.parse(string):
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if t[1] is not None:
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field_name_seen = True
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# We cannot break here, as we need to consume the whole string
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# to ensure that it is a valid format string.
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except ValueError:
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return False
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return field_name_seen
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def _parse_datetime_header(value: str) -> datetime.datetime:
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match = re.match(r'^(?P<datetime>.*?)(?P<tzoffset>[+-]\d{4})?$', value)
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dt = datetime.datetime.strptime(match.group('datetime'), '%Y-%m-%d %H:%M')
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# Separate the offset into a sign component, hours, and # minutes
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tzoffset = match.group('tzoffset')
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if tzoffset is not None:
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plus_minus_s, rest = tzoffset[0], tzoffset[1:]
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hours_offset_s, mins_offset_s = rest[:2], rest[2:]
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# Make them all integers
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plus_minus = int(f"{plus_minus_s}1")
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hours_offset = int(hours_offset_s)
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mins_offset = int(mins_offset_s)
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# Calculate net offset
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net_mins_offset = hours_offset * 60
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net_mins_offset += mins_offset
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net_mins_offset *= plus_minus
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# Create an offset object
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tzoffset = FixedOffsetTimezone(net_mins_offset)
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# Store the offset in a datetime object
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dt = dt.replace(tzinfo=tzoffset)
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return dt
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class Message:
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"""Representation of a single message in a catalog."""
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def __init__(
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self,
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id: _MessageID,
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string: _MessageID | None = '',
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locations: Iterable[tuple[str, int]] = (),
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flags: Iterable[str] = (),
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auto_comments: Iterable[str] = (),
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user_comments: Iterable[str] = (),
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previous_id: _MessageID = (),
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lineno: int | None = None,
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context: str | None = None,
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) -> None:
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"""Create the message object.
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:param id: the message ID, or a ``(singular, plural)`` tuple for
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pluralizable messages
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:param string: the translated message string, or a
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``(singular, plural)`` tuple for pluralizable messages
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:param locations: a sequence of ``(filename, lineno)`` tuples
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:param flags: a set or sequence of flags
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:param auto_comments: a sequence of automatic comments for the message
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:param user_comments: a sequence of user comments for the message
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:param previous_id: the previous message ID, or a ``(singular, plural)``
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tuple for pluralizable messages
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:param lineno: the line number on which the msgid line was found in the
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PO file, if any
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:param context: the message context
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"""
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self.id = id
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if not string and self.pluralizable:
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string = ('', '')
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self.string = string
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self.locations = list(distinct(locations))
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self.flags = set(flags)
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if id and self.python_format:
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self.flags.add('python-format')
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else:
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self.flags.discard('python-format')
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if id and self.python_brace_format:
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self.flags.add('python-brace-format')
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else:
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self.flags.discard('python-brace-format')
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self.auto_comments = list(distinct(auto_comments))
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self.user_comments = list(distinct(user_comments))
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if isinstance(previous_id, str):
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self.previous_id = [previous_id]
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else:
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self.previous_id = list(previous_id)
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self.lineno = lineno
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self.context = context
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def __repr__(self) -> str:
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return f"<{type(self).__name__} {self.id!r} (flags: {list(self.flags)!r})>"
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def __cmp__(self, other: object) -> int:
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"""Compare Messages, taking into account plural ids"""
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def values_to_compare(obj):
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if isinstance(obj, Message) and obj.pluralizable:
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return obj.id[0], obj.context or ''
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return obj.id, obj.context or ''
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return _cmp(values_to_compare(self), values_to_compare(other))
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def __gt__(self, other: object) -> bool:
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return self.__cmp__(other) > 0
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def __lt__(self, other: object) -> bool:
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return self.__cmp__(other) < 0
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def __ge__(self, other: object) -> bool:
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return self.__cmp__(other) >= 0
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def __le__(self, other: object) -> bool:
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return self.__cmp__(other) <= 0
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def __eq__(self, other: object) -> bool:
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return self.__cmp__(other) == 0
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def __ne__(self, other: object) -> bool:
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return self.__cmp__(other) != 0
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def is_identical(self, other: Message) -> bool:
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"""Checks whether messages are identical, taking into account all
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properties.
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"""
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assert isinstance(other, Message)
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return self.__dict__ == other.__dict__
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def clone(self) -> Message:
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return Message(*map(copy, (self.id, self.string, self.locations,
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self.flags, self.auto_comments,
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self.user_comments, self.previous_id,
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self.lineno, self.context)))
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def check(self, catalog: Catalog | None = None) -> list[TranslationError]:
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"""Run various validation checks on the message. Some validations
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are only performed if the catalog is provided. This method returns
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a sequence of `TranslationError` objects.
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:rtype: ``iterator``
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:param catalog: A catalog instance that is passed to the checkers
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:see: `Catalog.check` for a way to perform checks for all messages
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in a catalog.
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"""
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from babel.messages.checkers import checkers
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errors: list[TranslationError] = []
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for checker in checkers:
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try:
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checker(catalog, self)
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except TranslationError as e:
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errors.append(e)
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return errors
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@property
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def fuzzy(self) -> bool:
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"""Whether the translation is fuzzy.
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>>> Message('foo').fuzzy
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False
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>>> msg = Message('foo', 'foo', flags=['fuzzy'])
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>>> msg.fuzzy
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True
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>>> msg
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<Message 'foo' (flags: ['fuzzy'])>
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:type: `bool`"""
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return 'fuzzy' in self.flags
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@property
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def pluralizable(self) -> bool:
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"""Whether the message is plurizable.
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>>> Message('foo').pluralizable
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False
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>>> Message(('foo', 'bar')).pluralizable
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True
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:type: `bool`"""
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return isinstance(self.id, (list, tuple))
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@property
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def python_format(self) -> bool:
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"""Whether the message contains Python-style parameters.
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>>> Message('foo %(name)s bar').python_format
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True
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>>> Message(('foo %(name)s', 'foo %(name)s')).python_format
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True
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:type: `bool`"""
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ids = self.id
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if not isinstance(ids, (list, tuple)):
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ids = [ids]
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return any(PYTHON_FORMAT.search(id) for id in ids)
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@property
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def python_brace_format(self) -> bool:
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"""Whether the message contains Python f-string parameters.
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>>> Message('Hello, {name}!').python_brace_format
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True
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>>> Message(('One apple', '{count} apples')).python_brace_format
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True
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:type: `bool`"""
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ids = self.id
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if not isinstance(ids, (list, tuple)):
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ids = [ids]
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return any(_has_python_brace_format(id) for id in ids)
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class TranslationError(Exception):
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"""Exception thrown by translation checkers when invalid message
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translations are encountered."""
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DEFAULT_HEADER = """\
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# Translations template for PROJECT.
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# Copyright (C) YEAR ORGANIZATION
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# This file is distributed under the same license as the PROJECT project.
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# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
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#"""
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def parse_separated_header(value: str) -> dict[str, str]:
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# Adapted from https://peps.python.org/pep-0594/#cgi
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from email.message import Message
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m = Message()
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m['content-type'] = value
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return dict(m.get_params())
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def _force_text(s: str | bytes, encoding: str = 'utf-8', errors: str = 'strict') -> str:
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if isinstance(s, str):
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return s
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if isinstance(s, bytes):
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return s.decode(encoding, errors)
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return str(s)
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class Catalog:
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"""Representation of a message catalog."""
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def __init__(
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self,
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locale: Locale | str | None = None,
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domain: str | None = None,
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header_comment: str | None = DEFAULT_HEADER,
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project: str | None = None,
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version: str | None = None,
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copyright_holder: str | None = None,
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msgid_bugs_address: str | None = None,
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creation_date: datetime.datetime | str | None = None,
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revision_date: datetime.datetime | datetime.time | float | str | None = None,
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last_translator: str | None = None,
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language_team: str | None = None,
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charset: str | None = None,
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fuzzy: bool = True,
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) -> None:
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"""Initialize the catalog object.
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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 header_comment: the header comment as string, or `None` for the
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default header
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:param project: the project's name
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:param version: the project's version
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:param copyright_holder: the copyright holder of the catalog
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:param msgid_bugs_address: the email address or URL to submit bug
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reports to
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:param creation_date: the date the catalog was created
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:param revision_date: the date the catalog was revised
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:param last_translator: the name and email of the last translator
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:param language_team: the name and email of the language team
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:param charset: the encoding to use in the output (defaults to utf-8)
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:param fuzzy: the fuzzy bit on the catalog header
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"""
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self.domain = domain
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self.locale = locale
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self._header_comment = header_comment
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self._messages: dict[str | tuple[str, str], Message] = {}
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self.project = project or 'PROJECT'
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self.version = version or 'VERSION'
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self.copyright_holder = copyright_holder or 'ORGANIZATION'
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self.msgid_bugs_address = msgid_bugs_address or 'EMAIL@ADDRESS'
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|
|
self.last_translator = last_translator or 'FULL NAME <EMAIL@ADDRESS>'
|
||
|
|
"""Name and email address of the last translator."""
|
||
|
|
self.language_team = language_team or 'LANGUAGE <LL@li.org>'
|
||
|
|
"""Name and email address of the language team."""
|
||
|
|
|
||
|
|
self.charset = charset or 'utf-8'
|
||
|
|
|
||
|
|
if creation_date is None:
|
||
|
|
creation_date = datetime.datetime.now(LOCALTZ)
|
||
|
|
elif isinstance(creation_date, datetime.datetime) and not creation_date.tzinfo:
|
||
|
|
creation_date = creation_date.replace(tzinfo=LOCALTZ)
|
||
|
|
self.creation_date = creation_date
|
||
|
|
if revision_date is None:
|
||
|
|
revision_date = 'YEAR-MO-DA HO:MI+ZONE'
|
||
|
|
elif isinstance(revision_date, datetime.datetime) and not revision_date.tzinfo:
|
||
|
|
revision_date = revision_date.replace(tzinfo=LOCALTZ)
|
||
|
|
self.revision_date = revision_date
|
||
|
|
self.fuzzy = fuzzy
|
||
|
|
|
||
|
|
# Dictionary of obsolete messages
|
||
|
|
self.obsolete: dict[str | tuple[str, str], Message] = {}
|
||
|
|
self._num_plurals = None
|
||
|
|
self._plural_expr = None
|
||
|
|
|
||
|
|
def _set_locale(self, locale: Locale | str | None) -> None:
|
||
|
|
if locale is None:
|
||
|
|
self._locale_identifier = None
|
||
|
|
self._locale = None
|
||
|
|
return
|
||
|
|
|
||
|
|
if isinstance(locale, Locale):
|
||
|
|
self._locale_identifier = str(locale)
|
||
|
|
self._locale = locale
|
||
|
|
return
|
||
|
|
|
||
|
|
if isinstance(locale, str):
|
||
|
|
self._locale_identifier = str(locale)
|
||
|
|
try:
|
||
|
|
self._locale = Locale.parse(locale)
|
||
|
|
except UnknownLocaleError:
|
||
|
|
self._locale = None
|
||
|
|
return
|
||
|
|
|
||
|
|
raise TypeError(f"`locale` must be a Locale, a locale identifier string, or None; got {locale!r}")
|
||
|
|
|
||
|
|
def _get_locale(self) -> Locale | None:
|
||
|
|
return self._locale
|
||
|
|
|
||
|
|
def _get_locale_identifier(self) -> str | None:
|
||
|
|
return self._locale_identifier
|
||
|
|
|
||
|
|
locale = property(_get_locale, _set_locale)
|
||
|
|
locale_identifier = property(_get_locale_identifier)
|
||
|
|
|
||
|
|
def _get_header_comment(self) -> str:
|
||
|
|
comment = self._header_comment
|
||
|
|
year = datetime.datetime.now(LOCALTZ).strftime('%Y')
|
||
|
|
if hasattr(self.revision_date, 'strftime'):
|
||
|
|
year = self.revision_date.strftime('%Y')
|
||
|
|
comment = comment.replace('PROJECT', self.project) \
|
||
|
|
.replace('VERSION', self.version) \
|
||
|
|
.replace('YEAR', year) \
|
||
|
|
.replace('ORGANIZATION', self.copyright_holder)
|
||
|
|
locale_name = (self.locale.english_name if self.locale else self.locale_identifier)
|
||
|
|
if locale_name:
|
||
|
|
comment = comment.replace("Translations template", f"{locale_name} translations")
|
||
|
|
return comment
|
||
|
|
|
||
|
|
def _set_header_comment(self, string: str | None) -> None:
|
||
|
|
self._header_comment = string
|
||
|
|
|
||
|
|
header_comment = property(_get_header_comment, _set_header_comment, doc="""\
|
||
|
|
The header comment for the catalog.
|
||
|
|
|
||
|
|
>>> catalog = Catalog(project='Foobar', version='1.0',
|
||
|
|
... copyright_holder='Foo Company')
|
||
|
|
>>> print(catalog.header_comment) #doctest: +ELLIPSIS
|
||
|
|
# Translations template for Foobar.
|
||
|
|
# Copyright (C) ... Foo Company
|
||
|
|
# This file is distributed under the same license as the Foobar project.
|
||
|
|
# FIRST AUTHOR <EMAIL@ADDRESS>, ....
|
||
|
|
#
|
||
|
|
|
||
|
|
The header can also be set from a string. Any known upper-case variables
|
||
|
|
will be replaced when the header is retrieved again:
|
||
|
|
|
||
|
|
>>> catalog = Catalog(project='Foobar', version='1.0',
|
||
|
|
... copyright_holder='Foo Company')
|
||
|
|
>>> catalog.header_comment = '''\\
|
||
|
|
... # The POT for my really cool PROJECT project.
|
||
|
|
... # Copyright (C) 1990-2003 ORGANIZATION
|
||
|
|
... # This file is distributed under the same license as the PROJECT
|
||
|
|
... # project.
|
||
|
|
... #'''
|
||
|
|
>>> print(catalog.header_comment)
|
||
|
|
# The POT for my really cool Foobar project.
|
||
|
|
# Copyright (C) 1990-2003 Foo Company
|
||
|
|
# This file is distributed under the same license as the Foobar
|
||
|
|
# project.
|
||
|
|
#
|
||
|
|
|
||
|
|
:type: `unicode`
|
||
|
|
""")
|
||
|
|
|
||
|
|
def _get_mime_headers(self) -> list[tuple[str, str]]:
|
||
|
|
if isinstance(self.revision_date, (datetime.datetime, datetime.time, int, float)):
|
||
|
|
revision_date = format_datetime(self.revision_date, 'yyyy-MM-dd HH:mmZ', locale='en')
|
||
|
|
else:
|
||
|
|
revision_date = self.revision_date
|
||
|
|
|
||
|
|
language_team = self.language_team
|
||
|
|
if self.locale_identifier and 'LANGUAGE' in language_team:
|
||
|
|
language_team = language_team.replace('LANGUAGE', str(self.locale_identifier))
|
||
|
|
|
||
|
|
headers: list[tuple[str, str]] = [
|
||
|
|
("Project-Id-Version", f"{self.project} {self.version}"),
|
||
|
|
('Report-Msgid-Bugs-To', self.msgid_bugs_address),
|
||
|
|
('POT-Creation-Date', format_datetime(self.creation_date, 'yyyy-MM-dd HH:mmZ', locale='en')),
|
||
|
|
('PO-Revision-Date', revision_date),
|
||
|
|
('Last-Translator', self.last_translator),
|
||
|
|
]
|
||
|
|
if self.locale_identifier:
|
||
|
|
headers.append(('Language', str(self.locale_identifier)))
|
||
|
|
headers.append(('Language-Team', language_team))
|
||
|
|
if self.locale is not None:
|
||
|
|
headers.append(('Plural-Forms', self.plural_forms))
|
||
|
|
headers += [
|
||
|
|
('MIME-Version', '1.0'),
|
||
|
|
("Content-Type", f"text/plain; charset={self.charset}"),
|
||
|
|
('Content-Transfer-Encoding', '8bit'),
|
||
|
|
("Generated-By", f"Babel {VERSION}\n"),
|
||
|
|
]
|
||
|
|
return headers
|
||
|
|
|
||
|
|
def _set_mime_headers(self, headers: Iterable[tuple[str, str]]) -> None:
|
||
|
|
for name, value in headers:
|
||
|
|
name = _force_text(name.lower(), encoding=self.charset)
|
||
|
|
value = _force_text(value, encoding=self.charset)
|
||
|
|
if name == 'project-id-version':
|
||
|
|
parts = value.split(' ')
|
||
|
|
self.project = ' '.join(parts[:-1])
|
||
|
|
self.version = parts[-1]
|
||
|
|
elif name == 'report-msgid-bugs-to':
|
||
|
|
self.msgid_bugs_address = value
|
||
|
|
elif name == 'last-translator':
|
||
|
|
self.last_translator = value
|
||
|
|
elif name == 'language':
|
||
|
|
value = value.replace('-', '_')
|
||
|
|
# The `or None` makes sure that the locale is set to None
|
||
|
|
# if the header's value is an empty string, which is what
|
||
|
|
# some tools generate (instead of eliding the empty Language
|
||
|
|
# header altogether).
|
||
|
|
self._set_locale(value or None)
|
||
|
|
elif name == 'language-team':
|
||
|
|
self.language_team = value
|
||
|
|
elif name == 'content-type':
|
||
|
|
params = parse_separated_header(value)
|
||
|
|
if 'charset' in params:
|
||
|
|
self.charset = params['charset'].lower()
|
||
|
|
elif name == 'plural-forms':
|
||
|
|
params = parse_separated_header(f" ;{value}")
|
||
|
|
self._num_plurals = int(params.get('nplurals', 2))
|
||
|
|
self._plural_expr = params.get('plural', '(n != 1)')
|
||
|
|
elif name == 'pot-creation-date':
|
||
|
|
self.creation_date = _parse_datetime_header(value)
|
||
|
|
elif name == 'po-revision-date':
|
||
|
|
# Keep the value if it's not the default one
|
||
|
|
if 'YEAR' not in value:
|
||
|
|
self.revision_date = _parse_datetime_header(value)
|
||
|
|
|
||
|
|
mime_headers = property(_get_mime_headers, _set_mime_headers, doc="""\
|
||
|
|
The MIME headers of the catalog, used for the special ``msgid ""`` entry.
|
||
|
|
|
||
|
|
The behavior of this property changes slightly depending on whether a locale
|
||
|
|
is set or not, the latter indicating that the catalog is actually a template
|
||
|
|
for actual translations.
|
||
|
|
|
||
|
|
Here's an example of the output for such a catalog template:
|
||
|
|
|
||
|
|
>>> from babel.dates import UTC
|
||
|
|
>>> from datetime import datetime
|
||
|
|
>>> created = datetime(1990, 4, 1, 15, 30, tzinfo=UTC)
|
||
|
|
>>> catalog = Catalog(project='Foobar', version='1.0',
|
||
|
|
... creation_date=created)
|
||
|
|
>>> for name, value in catalog.mime_headers:
|
||
|
|
... print('%s: %s' % (name, value))
|
||
|
|
Project-Id-Version: Foobar 1.0
|
||
|
|
Report-Msgid-Bugs-To: EMAIL@ADDRESS
|
||
|
|
POT-Creation-Date: 1990-04-01 15:30+0000
|
||
|
|
PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE
|
||
|
|
Last-Translator: FULL NAME <EMAIL@ADDRESS>
|
||
|
|
Language-Team: LANGUAGE <LL@li.org>
|
||
|
|
MIME-Version: 1.0
|
||
|
|
Content-Type: text/plain; charset=utf-8
|
||
|
|
Content-Transfer-Encoding: 8bit
|
||
|
|
Generated-By: Babel ...
|
||
|
|
|
||
|
|
And here's an example of the output when the locale is set:
|
||
|
|
|
||
|
|
>>> revised = datetime(1990, 8, 3, 12, 0, tzinfo=UTC)
|
||
|
|
>>> catalog = Catalog(locale='de_DE', project='Foobar', version='1.0',
|
||
|
|
... creation_date=created, revision_date=revised,
|
||
|
|
... last_translator='John Doe <jd@example.com>',
|
||
|
|
... language_team='de_DE <de@example.com>')
|
||
|
|
>>> for name, value in catalog.mime_headers:
|
||
|
|
... print('%s: %s' % (name, value))
|
||
|
|
Project-Id-Version: Foobar 1.0
|
||
|
|
Report-Msgid-Bugs-To: EMAIL@ADDRESS
|
||
|
|
POT-Creation-Date: 1990-04-01 15:30+0000
|
||
|
|
PO-Revision-Date: 1990-08-03 12:00+0000
|
||
|
|
Last-Translator: John Doe <jd@example.com>
|
||
|
|
Language: de_DE
|
||
|
|
Language-Team: de_DE <de@example.com>
|
||
|
|
Plural-Forms: nplurals=2; plural=(n != 1);
|
||
|
|
MIME-Version: 1.0
|
||
|
|
Content-Type: text/plain; charset=utf-8
|
||
|
|
Content-Transfer-Encoding: 8bit
|
||
|
|
Generated-By: Babel ...
|
||
|
|
|
||
|
|
:type: `list`
|
||
|
|
""")
|
||
|
|
|
||
|
|
@property
|
||
|
|
def num_plurals(self) -> int:
|
||
|
|
"""The number of plurals used by the catalog or locale.
|
||
|
|
|
||
|
|
>>> Catalog(locale='en').num_plurals
|
||
|
|
2
|
||
|
|
>>> Catalog(locale='ga').num_plurals
|
||
|
|
5
|
||
|
|
|
||
|
|
:type: `int`"""
|
||
|
|
if self._num_plurals is None:
|
||
|
|
num = 2
|
||
|
|
if self.locale:
|
||
|
|
num = get_plural(self.locale)[0]
|
||
|
|
self._num_plurals = num
|
||
|
|
return self._num_plurals
|
||
|
|
|
||
|
|
@property
|
||
|
|
def plural_expr(self) -> str:
|
||
|
|
"""The plural expression used by the catalog or locale.
|
||
|
|
|
||
|
|
>>> Catalog(locale='en').plural_expr
|
||
|
|
'(n != 1)'
|
||
|
|
>>> Catalog(locale='ga').plural_expr
|
||
|
|
'(n==1 ? 0 : n==2 ? 1 : n>=3 && n<=6 ? 2 : n>=7 && n<=10 ? 3 : 4)'
|
||
|
|
>>> Catalog(locale='ding').plural_expr # unknown locale
|
||
|
|
'(n != 1)'
|
||
|
|
|
||
|
|
:type: `str`"""
|
||
|
|
if self._plural_expr is None:
|
||
|
|
expr = '(n != 1)'
|
||
|
|
if self.locale:
|
||
|
|
expr = get_plural(self.locale)[1]
|
||
|
|
self._plural_expr = expr
|
||
|
|
return self._plural_expr
|
||
|
|
|
||
|
|
@property
|
||
|
|
def plural_forms(self) -> str:
|
||
|
|
"""Return the plural forms declaration for the locale.
|
||
|
|
|
||
|
|
>>> Catalog(locale='en').plural_forms
|
||
|
|
'nplurals=2; plural=(n != 1);'
|
||
|
|
>>> Catalog(locale='pt_BR').plural_forms
|
||
|
|
'nplurals=2; plural=(n > 1);'
|
||
|
|
|
||
|
|
:type: `str`"""
|
||
|
|
return f"nplurals={self.num_plurals}; plural={self.plural_expr};"
|
||
|
|
|
||
|
|
def __contains__(self, id: _MessageID) -> bool:
|
||
|
|
"""Return whether the catalog has a message with the specified ID."""
|
||
|
|
return self._key_for(id) in self._messages
|
||
|
|
|
||
|
|
def __len__(self) -> int:
|
||
|
|
"""The number of messages in the catalog.
|
||
|
|
|
||
|
|
This does not include the special ``msgid ""`` entry."""
|
||
|
|
return len(self._messages)
|
||
|
|
|
||
|
|
def __iter__(self) -> Iterator[Message]:
|
||
|
|
"""Iterates through all the entries in the catalog, in the order they
|
||
|
|
were added, yielding a `Message` object for every entry.
|
||
|
|
|
||
|
|
:rtype: ``iterator``"""
|
||
|
|
buf = []
|
||
|
|
for name, value in self.mime_headers:
|
||
|
|
buf.append(f"{name}: {value}")
|
||
|
|
flags = set()
|
||
|
|
if self.fuzzy:
|
||
|
|
flags |= {'fuzzy'}
|
||
|
|
yield Message('', '\n'.join(buf), flags=flags)
|
||
|
|
for key in self._messages:
|
||
|
|
yield self._messages[key]
|
||
|
|
|
||
|
|
def __repr__(self) -> str:
|
||
|
|
locale = ''
|
||
|
|
if self.locale:
|
||
|
|
locale = f" {self.locale}"
|
||
|
|
return f"<{type(self).__name__} {self.domain!r}{locale}>"
|
||
|
|
|
||
|
|
def __delitem__(self, id: _MessageID) -> None:
|
||
|
|
"""Delete the message with the specified ID."""
|
||
|
|
self.delete(id)
|
||
|
|
|
||
|
|
def __getitem__(self, id: _MessageID) -> Message:
|
||
|
|
"""Return the message with the specified ID.
|
||
|
|
|
||
|
|
:param id: the message ID
|
||
|
|
"""
|
||
|
|
return self.get(id)
|
||
|
|
|
||
|
|
def __setitem__(self, id: _MessageID, message: Message) -> None:
|
||
|
|
"""Add or update the message with the specified ID.
|
||
|
|
|
||
|
|
>>> catalog = Catalog()
|
||
|
|
>>> catalog[u'foo'] = Message(u'foo')
|
||
|
|
>>> catalog[u'foo']
|
||
|
|
<Message u'foo' (flags: [])>
|
||
|
|
|
||
|
|
If a message with that ID is already in the catalog, it is updated
|
||
|
|
to include the locations and flags of the new message.
|
||
|
|
|
||
|
|
>>> catalog = Catalog()
|
||
|
|
>>> catalog[u'foo'] = Message(u'foo', locations=[('main.py', 1)])
|
||
|
|
>>> catalog[u'foo'].locations
|
||
|
|
[('main.py', 1)]
|
||
|
|
>>> catalog[u'foo'] = Message(u'foo', locations=[('utils.py', 5)])
|
||
|
|
>>> catalog[u'foo'].locations
|
||
|
|
[('main.py', 1), ('utils.py', 5)]
|
||
|
|
|
||
|
|
:param id: the message ID
|
||
|
|
:param message: the `Message` object
|
||
|
|
"""
|
||
|
|
assert isinstance(message, Message), 'expected a Message object'
|
||
|
|
key = self._key_for(id, message.context)
|
||
|
|
current = self._messages.get(key)
|
||
|
|
if current:
|
||
|
|
if message.pluralizable and not current.pluralizable:
|
||
|
|
# The new message adds pluralization
|
||
|
|
current.id = message.id
|
||
|
|
current.string = message.string
|
||
|
|
current.locations = list(distinct(current.locations +
|
||
|
|
message.locations))
|
||
|
|
current.auto_comments = list(distinct(current.auto_comments +
|
||
|
|
message.auto_comments))
|
||
|
|
current.user_comments = list(distinct(current.user_comments +
|
||
|
|
message.user_comments))
|
||
|
|
current.flags |= message.flags
|
||
|
|
elif id == '':
|
||
|
|
# special treatment for the header message
|
||
|
|
self.mime_headers = message_from_string(message.string).items()
|
||
|
|
self.header_comment = "\n".join([f"# {c}".rstrip() for c in message.user_comments])
|
||
|
|
self.fuzzy = message.fuzzy
|
||
|
|
else:
|
||
|
|
if isinstance(id, (list, tuple)):
|
||
|
|
assert isinstance(message.string, (list, tuple)), \
|
||
|
|
f"Expected sequence but got {type(message.string)}"
|
||
|
|
self._messages[key] = message
|
||
|
|
|
||
|
|
def add(
|
||
|
|
self,
|
||
|
|
id: _MessageID,
|
||
|
|
string: _MessageID | None = None,
|
||
|
|
locations: Iterable[tuple[str, int]] = (),
|
||
|
|
flags: Iterable[str] = (),
|
||
|
|
auto_comments: Iterable[str] = (),
|
||
|
|
user_comments: Iterable[str] = (),
|
||
|
|
previous_id: _MessageID = (),
|
||
|
|
lineno: int | None = None,
|
||
|
|
context: str | None = None,
|
||
|
|
) -> Message:
|
||
|
|
"""Add or update the message with the specified ID.
|
||
|
|
|
||
|
|
>>> catalog = Catalog()
|
||
|
|
>>> catalog.add(u'foo')
|
||
|
|
<Message ...>
|
||
|
|
>>> catalog[u'foo']
|
||
|
|
<Message u'foo' (flags: [])>
|
||
|
|
|
||
|
|
This method simply constructs a `Message` object with the given
|
||
|
|
arguments and invokes `__setitem__` with that object.
|
||
|
|
|
||
|
|
:param id: the message ID, or a ``(singular, plural)`` tuple for
|
||
|
|
pluralizable messages
|
||
|
|
:param string: the translated message string, or a
|
||
|
|
``(singular, plural)`` tuple for pluralizable messages
|
||
|
|
:param locations: a sequence of ``(filename, lineno)`` tuples
|
||
|
|
:param flags: a set or sequence of flags
|
||
|
|
:param auto_comments: a sequence of automatic comments
|
||
|
|
:param user_comments: a sequence of user comments
|
||
|
|
:param previous_id: the previous message ID, or a ``(singular, plural)``
|
||
|
|
tuple for pluralizable messages
|
||
|
|
:param lineno: the line number on which the msgid line was found in the
|
||
|
|
PO file, if any
|
||
|
|
:param context: the message context
|
||
|
|
"""
|
||
|
|
message = Message(id, string, list(locations), flags, auto_comments,
|
||
|
|
user_comments, previous_id, lineno=lineno,
|
||
|
|
context=context)
|
||
|
|
self[id] = message
|
||
|
|
return message
|
||
|
|
|
||
|
|
def check(self) -> Iterable[tuple[Message, list[TranslationError]]]:
|
||
|
|
"""Run various validation checks on the translations in the catalog.
|
||
|
|
|
||
|
|
For every message which fails validation, this method yield a
|
||
|
|
``(message, errors)`` tuple, where ``message`` is the `Message` object
|
||
|
|
and ``errors`` is a sequence of `TranslationError` objects.
|
||
|
|
|
||
|
|
:rtype: ``generator`` of ``(message, errors)``
|
||
|
|
"""
|
||
|
|
for message in self._messages.values():
|
||
|
|
errors = message.check(catalog=self)
|
||
|
|
if errors:
|
||
|
|
yield message, errors
|
||
|
|
|
||
|
|
def get(self, id: _MessageID, context: str | None = None) -> Message | None:
|
||
|
|
"""Return the message with the specified ID and context.
|
||
|
|
|
||
|
|
:param id: the message ID
|
||
|
|
:param context: the message context, or ``None`` for no context
|
||
|
|
"""
|
||
|
|
return self._messages.get(self._key_for(id, context))
|
||
|
|
|
||
|
|
def delete(self, id: _MessageID, context: str | None = None) -> None:
|
||
|
|
"""Delete the message with the specified ID and context.
|
||
|
|
|
||
|
|
:param id: the message ID
|
||
|
|
:param context: the message context, or ``None`` for no context
|
||
|
|
"""
|
||
|
|
key = self._key_for(id, context)
|
||
|
|
if key in self._messages:
|
||
|
|
del self._messages[key]
|
||
|
|
|
||
|
|
def update(
|
||
|
|
self,
|
||
|
|
template: Catalog,
|
||
|
|
no_fuzzy_matching: bool = False,
|
||
|
|
update_header_comment: bool = False,
|
||
|
|
keep_user_comments: bool = True,
|
||
|
|
update_creation_date: bool = True,
|
||
|
|
) -> None:
|
||
|
|
"""Update the catalog based on the given template catalog.
|
||
|
|
|
||
|
|
>>> from babel.messages import Catalog
|
||
|
|
>>> template = Catalog()
|
||
|
|
>>> template.add('green', locations=[('main.py', 99)])
|
||
|
|
<Message ...>
|
||
|
|
>>> template.add('blue', locations=[('main.py', 100)])
|
||
|
|
<Message ...>
|
||
|
|
>>> template.add(('salad', 'salads'), locations=[('util.py', 42)])
|
||
|
|
<Message ...>
|
||
|
|
>>> catalog = Catalog(locale='de_DE')
|
||
|
|
>>> catalog.add('blue', u'blau', locations=[('main.py', 98)])
|
||
|
|
<Message ...>
|
||
|
|
>>> catalog.add('head', u'Kopf', locations=[('util.py', 33)])
|
||
|
|
<Message ...>
|
||
|
|
>>> catalog.add(('salad', 'salads'), (u'Salat', u'Salate'),
|
||
|
|
... locations=[('util.py', 38)])
|
||
|
|
<Message ...>
|
||
|
|
|
||
|
|
>>> catalog.update(template)
|
||
|
|
>>> len(catalog)
|
||
|
|
3
|
||
|
|
|
||
|
|
>>> msg1 = catalog['green']
|
||
|
|
>>> msg1.string
|
||
|
|
>>> msg1.locations
|
||
|
|
[('main.py', 99)]
|
||
|
|
|
||
|
|
>>> msg2 = catalog['blue']
|
||
|
|
>>> msg2.string
|
||
|
|
u'blau'
|
||
|
|
>>> msg2.locations
|
||
|
|
[('main.py', 100)]
|
||
|
|
|
||
|
|
>>> msg3 = catalog['salad']
|
||
|
|
>>> msg3.string
|
||
|
|
(u'Salat', u'Salate')
|
||
|
|
>>> msg3.locations
|
||
|
|
[('util.py', 42)]
|
||
|
|
|
||
|
|
Messages that are in the catalog but not in the template are removed
|
||
|
|
from the main collection, but can still be accessed via the `obsolete`
|
||
|
|
member:
|
||
|
|
|
||
|
|
>>> 'head' in catalog
|
||
|
|
False
|
||
|
|
>>> list(catalog.obsolete.values())
|
||
|
|
[<Message 'head' (flags: [])>]
|
||
|
|
|
||
|
|
:param template: the reference catalog, usually read from a POT file
|
||
|
|
:param no_fuzzy_matching: whether to use fuzzy matching of message IDs
|
||
|
|
:param update_header_comment: whether to copy the header comment from the template
|
||
|
|
:param keep_user_comments: whether to keep user comments from the old catalog
|
||
|
|
:param update_creation_date: whether to copy the creation date from the template
|
||
|
|
"""
|
||
|
|
messages = self._messages
|
||
|
|
remaining = messages.copy()
|
||
|
|
self._messages = {}
|
||
|
|
|
||
|
|
# Prepare for fuzzy matching
|
||
|
|
fuzzy_candidates = {}
|
||
|
|
if not no_fuzzy_matching:
|
||
|
|
for msgid in messages:
|
||
|
|
if msgid and messages[msgid].string:
|
||
|
|
key = self._key_for(msgid)
|
||
|
|
ctxt = messages[msgid].context
|
||
|
|
fuzzy_candidates[self._to_fuzzy_match_key(key)] = (key, ctxt)
|
||
|
|
fuzzy_matches = set()
|
||
|
|
|
||
|
|
def _merge(message: Message, oldkey: tuple[str, str] | str, newkey: tuple[str, str] | str) -> None:
|
||
|
|
message = message.clone()
|
||
|
|
fuzzy = False
|
||
|
|
if oldkey != newkey:
|
||
|
|
fuzzy = True
|
||
|
|
fuzzy_matches.add(oldkey)
|
||
|
|
oldmsg = messages.get(oldkey)
|
||
|
|
assert oldmsg is not None
|
||
|
|
if isinstance(oldmsg.id, str):
|
||
|
|
message.previous_id = [oldmsg.id]
|
||
|
|
else:
|
||
|
|
message.previous_id = list(oldmsg.id)
|
||
|
|
else:
|
||
|
|
oldmsg = remaining.pop(oldkey, None)
|
||
|
|
assert oldmsg is not None
|
||
|
|
message.string = oldmsg.string
|
||
|
|
|
||
|
|
if keep_user_comments:
|
||
|
|
message.user_comments = list(distinct(oldmsg.user_comments))
|
||
|
|
|
||
|
|
if isinstance(message.id, (list, tuple)):
|
||
|
|
if not isinstance(message.string, (list, tuple)):
|
||
|
|
fuzzy = True
|
||
|
|
message.string = tuple(
|
||
|
|
[message.string] + ([''] * (len(message.id) - 1)),
|
||
|
|
)
|
||
|
|
elif len(message.string) != self.num_plurals:
|
||
|
|
fuzzy = True
|
||
|
|
message.string = tuple(message.string[:len(oldmsg.string)])
|
||
|
|
elif isinstance(message.string, (list, tuple)):
|
||
|
|
fuzzy = True
|
||
|
|
message.string = message.string[0]
|
||
|
|
message.flags |= oldmsg.flags
|
||
|
|
if fuzzy:
|
||
|
|
message.flags |= {'fuzzy'}
|
||
|
|
self[message.id] = message
|
||
|
|
|
||
|
|
for message in template:
|
||
|
|
if message.id:
|
||
|
|
key = self._key_for(message.id, message.context)
|
||
|
|
if key in messages:
|
||
|
|
_merge(message, key, key)
|
||
|
|
else:
|
||
|
|
if not no_fuzzy_matching:
|
||
|
|
# do some fuzzy matching with difflib
|
||
|
|
matches = get_close_matches(
|
||
|
|
self._to_fuzzy_match_key(key),
|
||
|
|
fuzzy_candidates.keys(),
|
||
|
|
1,
|
||
|
|
)
|
||
|
|
if matches:
|
||
|
|
modified_key = matches[0]
|
||
|
|
newkey, newctxt = fuzzy_candidates[modified_key]
|
||
|
|
if newctxt is not None:
|
||
|
|
newkey = newkey, newctxt
|
||
|
|
_merge(message, newkey, key)
|
||
|
|
continue
|
||
|
|
|
||
|
|
self[message.id] = message
|
||
|
|
|
||
|
|
for msgid in remaining:
|
||
|
|
if no_fuzzy_matching or msgid not in fuzzy_matches:
|
||
|
|
self.obsolete[msgid] = remaining[msgid]
|
||
|
|
|
||
|
|
if update_header_comment:
|
||
|
|
# Allow the updated catalog's header to be rewritten based on the
|
||
|
|
# template's header
|
||
|
|
self.header_comment = template.header_comment
|
||
|
|
|
||
|
|
# Make updated catalog's POT-Creation-Date equal to the template
|
||
|
|
# used to update the catalog
|
||
|
|
if update_creation_date:
|
||
|
|
self.creation_date = template.creation_date
|
||
|
|
|
||
|
|
def _to_fuzzy_match_key(self, key: tuple[str, str] | str) -> str:
|
||
|
|
"""Converts a message key to a string suitable for fuzzy matching."""
|
||
|
|
if isinstance(key, tuple):
|
||
|
|
matchkey = key[0] # just the msgid, no context
|
||
|
|
else:
|
||
|
|
matchkey = key
|
||
|
|
return matchkey.lower().strip()
|
||
|
|
|
||
|
|
def _key_for(self, id: _MessageID, context: str | None = None) -> tuple[str, str] | str:
|
||
|
|
"""The key for a message is just the singular ID even for pluralizable
|
||
|
|
messages, but is a ``(msgid, msgctxt)`` tuple for context-specific
|
||
|
|
messages.
|
||
|
|
"""
|
||
|
|
key = id
|
||
|
|
if isinstance(key, (list, tuple)):
|
||
|
|
key = id[0]
|
||
|
|
if context is not None:
|
||
|
|
key = (key, context)
|
||
|
|
return key
|
||
|
|
|
||
|
|
def is_identical(self, other: Catalog) -> bool:
|
||
|
|
"""Checks if catalogs are identical, taking into account messages and
|
||
|
|
headers.
|
||
|
|
"""
|
||
|
|
assert isinstance(other, Catalog)
|
||
|
|
for key in self._messages.keys() | other._messages.keys():
|
||
|
|
message_1 = self.get(key)
|
||
|
|
message_2 = other.get(key)
|
||
|
|
if (
|
||
|
|
message_1 is None
|
||
|
|
or message_2 is None
|
||
|
|
or not message_1.is_identical(message_2)
|
||
|
|
):
|
||
|
|
return False
|
||
|
|
return dict(self.mime_headers) == dict(other.mime_headers)
|