babel/mirror: babel/plural.py annotate

annotate babel/plural.py @ 579:99d51589c822 trunk

use decorators (as we require Python 2.4+ anyway)

author	fschwarz
date	Tue, 31 Jul 2012 08:46:19 +0000
parents	ca203b2af83c
children

rev	line source
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	1 # -- coding: utf-8 --
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	2 #
530 ca203b2af83c Update the copyright line. jruigrok parents: 525 diff changeset	3 # Copyright (C) 2008-2011 Edgewall Software
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	4 # All rights reserved.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	5 #
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	6 # This software is licensed as described in the file COPYING, which
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	7 # you should have received as part of this distribution. The terms
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	8 # are also available at http://babel.edgewall.org/wiki/License.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	9 #
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	10 # This software consists of voluntary contributions made by many
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	11 # individuals. For the exact contribution history, see the revision
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	12 # history and logs, available at http://babel.edgewall.org/log/.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	13
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	14 """CLDR Plural support. See UTS #35. EXPERIMENTAL"""
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	15
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	16 import re
414 05487ae7696e fix Python 2.3 compat: rearrange set/itemgetter/rsplit/sorted/unicode.decode pjenvey parents: 411 diff changeset	17
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	18 __all__ = ['PluralRule', 'RuleError', 'to_gettext', 'to_javascript',
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	19 'to_python']
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	20 __docformat__ = 'restructuredtext en'
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	21
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	22
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	23 _plural_tags = ('zero', 'one', 'two', 'few', 'many', 'other')
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	24 _fallback_tag = 'other'
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	25
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	26
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	27 class PluralRule(object):
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	28 """Represents a set of language pluralization rules. The constructor
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	29 accepts a list of (tag, expr) tuples or a dict of CLDR rules. The
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	30 resulting object is callable and accepts one parameter with a positive or
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	31 negative number (both integer and float) for the number that indicates the
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	32 plural form for a string and returns the tag for the format:
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	33
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	34 >>> rule = PluralRule({'one': 'n is 1'})
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	35 >>> rule(1)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	36 'one'
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	37 >>> rule(2)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	38 'other'
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	39
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	40 Currently the CLDR defines these tags: zero, one, two, few, many and
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	41 other where other is an implicit default. Rules should be mutually
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	42 exclusive; for a given numeric value, only one rule should apply (i.e.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	43 the condition should only be true for one of the plural rule elements.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	44 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	45
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	46 __slots__ = ('abstract', '_func')
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	47
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	48 def __init__(self, rules):
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	49 """Initialize the rule instance.
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	50
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	51 :param rules: a list of ``(tag, expr)``) tuples with the rules
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	52 conforming to UTS #35 or a dict with the tags as keys
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	53 and expressions as values.
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	54 :raise RuleError: if the expression is malformed
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	55 """
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	56 if isinstance(rules, dict):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	57 rules = rules.items()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	58 found = set()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	59 self.abstract = []
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	60 for key, expr in rules:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	61 if key not in _plural_tags:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	62 raise ValueError('unknown tag %r' % key)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	63 elif key in found:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	64 raise ValueError('tag %r defined twice' % key)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	65 found.add(key)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	66 self.abstract.append((key, _Parser(expr).ast))
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	67
390 c5bc0f6822a9 Preliminary support for timedelta formatting (see #126), and import/expose the locale plural rules from the CLDR. cmlenz parents: 387 diff changeset	68 def __repr__(self):
393 250c7cba8c12 alternative repr for plural rules aronacher parents: 392 diff changeset	69 rules = self.rules
250c7cba8c12 alternative repr for plural rules aronacher parents: 392 diff changeset	70 return '<%s %r>' % (
250c7cba8c12 alternative repr for plural rules aronacher parents: 392 diff changeset	71 type(self).__name__,
250c7cba8c12 alternative repr for plural rules aronacher parents: 392 diff changeset	72 ', '.join(['%s: %s' % (tag, rules[tag]) for tag in _plural_tags
250c7cba8c12 alternative repr for plural rules aronacher parents: 392 diff changeset	73 if tag in rules])
250c7cba8c12 alternative repr for plural rules aronacher parents: 392 diff changeset	74 )
390 c5bc0f6822a9 Preliminary support for timedelta formatting (see #126), and import/expose the locale plural rules from the CLDR. cmlenz parents: 387 diff changeset	75
579 99d51589c822 use decorators (as we require Python 2.4+ anyway) fschwarz parents: 530 diff changeset	76 @classmethod
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	77 def parse(cls, rules):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	78 """Create a `PluralRule` instance for the given rules. If the rules
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	79 are a `PluralRule` object, that object is returned.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	80
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	81 :param rules: the rules as list or dict, or a `PluralRule` object
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	82 :return: a corresponding `PluralRule` object
410 18c4f623e524 Fix some epydoc usage in the `plural` module. cmlenz parents: 393 diff changeset	83 :raise Ruleerror: if the expression is malformed
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	84 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	85 if isinstance(rules, cls):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	86 return rules
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	87 return cls(rules)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	88
579 99d51589c822 use decorators (as we require Python 2.4+ anyway) fschwarz parents: 530 diff changeset	89 @property
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	90 def rules(self):
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	91 """The `PluralRule` as a dict of unicode plural rules.
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	92
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	93 >>> rule = PluralRule({'one': 'n is 1'})
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	94 >>> rule.rules
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	95 {'one': 'n is 1'}
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	96 """
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	97 _compile = _UnicodeCompiler().compile
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	98 return dict([(tag, _compile(ast)) for tag, ast in self.abstract])
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	99
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	100 tags = property(lambda x: frozenset([i[0] for i in x.abstract]), doc="""
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	101 A set of explicitly defined tags in this rule. The implicit default
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	102 ``'other'`` rules is not part of this set unless there is an explicit
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	103 rule for it.""")
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	104
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	105 def __getstate__(self):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	106 return self.abstract
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	107
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	108 def __setstate__(self, abstract):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	109 self.abstract = abstract
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	110
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	111 def __call__(self, n):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	112 if not hasattr(self, '_func'):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	113 self._func = to_python(self)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	114 return self._func(n)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	115
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	116
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	117 def to_javascript(rule):
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	118 """Convert a list/dict of rules or a `PluralRule` object into a JavaScript
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	119 function. This function depends on no external library:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	120
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	121 >>> to_javascript({'one': 'n is 1'})
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	122 "(function(n) { return (n == 1) ? 'one' : 'other'; })"
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	123
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	124 Implementation detail: The function generated will probably evaluate
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	125 expressions involved into range operations multiple times. This has the
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	126 advantage that external helper functions are not required and is not a
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	127 big performance hit for these simple calculations.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	128
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	129 :param rule: the rules as list or dict, or a `PluralRule` object
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	130 :return: a corresponding JavaScript function as `str`
410 18c4f623e524 Fix some epydoc usage in the `plural` module. cmlenz parents: 393 diff changeset	131 :raise RuleError: if the expression is malformed
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	132 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	133 to_js = _JavaScriptCompiler().compile
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	134 result = ['(function(n) { return ']
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	135 for tag, ast in PluralRule.parse(rule).abstract:
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	136 result.append('%s ? %r : ' % (to_js(ast), tag))
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	137 result.append('%r; })' % _fallback_tag)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	138 return ''.join(result)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	139
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	140
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	141 def to_python(rule):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	142 """Convert a list/dict of rules or a `PluralRule` object into a regular
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	143 Python function. This is useful in situations where you need a real
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	144 function and don't are about the actual rule object:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	145
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	146 >>> func = to_python({'one': 'n is 1', 'few': 'n in 2..4'})
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	147 >>> func(1)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	148 'one'
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	149 >>> func(3)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	150 'few'
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	151
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	152 :param rule: the rules as list or dict, or a `PluralRule` object
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	153 :return: a corresponding Python function
410 18c4f623e524 Fix some epydoc usage in the `plural` module. cmlenz parents: 393 diff changeset	154 :raise RuleError: if the expression is malformed
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	155 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	156 namespace = {
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	157 'IN': in_range,
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	158 'WITHIN': within_range,
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	159 'MOD': cldr_modulo
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	160 }
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	161 to_python = _PythonCompiler().compile
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	162 result = ['def evaluate(n):']
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	163 for tag, ast in PluralRule.parse(rule).abstract:
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	164 result.append(' if (%s): return %r' % (to_python(ast), tag))
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	165 result.append(' return %r' % _fallback_tag)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	166 exec '\n'.join(result) in namespace
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	167 return namespace['evaluate']
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	168
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	169
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	170 def to_gettext(rule):
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	171 """The plural rule as gettext expression. The gettext expression is
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	172 technically limited to integers and returns indices rather than tags.
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	173
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	174 >>> to_gettext({'one': 'n is 1', 'two': 'n is 2'})
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	175 'nplurals=3; plural=((n == 2) ? 1 : (n == 1) ? 0 : 2)'
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	176
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	177 :param rule: the rules as list or dict, or a `PluralRule` object
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	178 :return: an equivalent gettext-style plural expression
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	179 :raise RuleError: if the expression is malformed
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	180 """
411 49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	181 rule = PluralRule.parse(rule)
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	182
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	183 used_tags = rule.tags \| set([_fallback_tag])
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	184 _compile = _GettextCompiler().compile
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	185 _get_index = [tag for tag in _plural_tags if tag in used_tags].index
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	186
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	187 result = ['nplurals=%d; plural=(' % len(used_tags)]
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	188 for tag, ast in rule.abstract:
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	189 result.append('%s ? %d : ' % (_compile(ast), _get_index(tag)))
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	190 result.append('%d)' % _get_index(_fallback_tag))
49859ecea64a More plural module cleanup and fixes. cmlenz parents: 410 diff changeset	191 return ''.join(result)
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	192
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	193
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	194 def in_range(num, min, max):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	195 """Integer range test. This is the callback for the "in" operator
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	196 of the UTS #35 pluralization rule language:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	197
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	198 >>> in_range(1, 1, 3)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	199 True
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	200 >>> in_range(3, 1, 3)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	201 True
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	202 >>> in_range(1.2, 1, 4)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	203 False
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	204 >>> in_range(10, 1, 4)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	205 False
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	206 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	207 return num == int(num) and within_range(num, min, max)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	208
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	209
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	210 def within_range(num, min, max):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	211 """Float range test. This is the callback for the "within" operator
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	212 of the UTS #35 pluralization rule language:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	213
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	214 >>> within_range(1, 1, 3)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	215 True
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	216 >>> within_range(1.0, 1, 3)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	217 True
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	218 >>> within_range(1.2, 1, 4)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	219 True
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	220 >>> within_range(10, 1, 4)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	221 False
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	222 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	223 return num >= min and num <= max
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	224
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	225
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	226 def cldr_modulo(a, b):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	227 """Javaish modulo. This modulo operator returns the value with the sign
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	228 of the dividend rather than the divisor like Python does:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	229
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	230 >>> cldr_modulo(-3, 5)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	231 -3
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	232 >>> cldr_modulo(-3, -5)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	233 -3
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	234 >>> cldr_modulo(3, 5)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	235 3
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	236 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	237 reverse = 0
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	238 if a < 0:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	239 a *= -1
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	240 reverse = 1
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	241 if b < 0:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	242 b *= -1
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	243 rv = a % b
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	244 if reverse:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	245 rv *= -1
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	246 return rv
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	247
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	248
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	249 class RuleError(Exception):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	250 """Raised if a rule is malformed."""
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	251
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	252
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	253 class _Parser(object):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	254 """Internal parser. This class can translate a single rule into an abstract
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	255 tree of tuples. It implements the following grammar::
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	256
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	257 condition = and_condition ('or' and_condition)*
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	258 and_condition = relation ('and' relation)*
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	259 relation = is_relation \| in_relation \| within_relation \| 'n' <EOL>
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	260 is_relation = expr 'is' ('not')? value
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	261 in_relation = expr ('not')? 'in' range
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	262 within_relation = expr ('not')? 'within' range
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	263 expr = 'n' ('mod' value)?
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	264 value = digit+
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	265 digit = 0\|1\|2\|3\|4\|5\|6\|7\|8\|9
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	266 range = value'..'value
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	267
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	268 - Whitespace can occur between or around any of the above tokens.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	269 - Rules should be mutually exclusive; for a given numeric value, only one
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	270 rule should apply (i.e. the condition should only be true for one of
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	271 the plural rule elements.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	272
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	273 The translator parses the expression on instanciation into an attribute
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	274 called `ast`.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	275 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	276
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	277 _rules = [
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	278 (None, re.compile(r'\s+(?u)')),
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	279 ('word', re.compile(r'\b(and\|or\|is\|(?:with)?in\|not\|mod\|n)\b')),
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	280 ('value', re.compile(r'\d+')),
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	281 ('ellipsis', re.compile(r'\.\.'))
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	282 ]
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	283
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	284 def __init__(self, string):
390 c5bc0f6822a9 Preliminary support for timedelta formatting (see #126), and import/expose the locale plural rules from the CLDR. cmlenz parents: 387 diff changeset	285 string = string.lower()
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	286 result = []
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	287 pos = 0
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	288 end = len(string)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	289 while pos < end:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	290 for tok, rule in self._rules:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	291 match = rule.match(string, pos)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	292 if match is not None:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	293 pos = match.end()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	294 if tok:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	295 result.append((tok, match.group()))
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	296 break
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	297 else:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	298 raise RuleError('malformed CLDR pluralization rule. '
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	299 'Got unexpected %r' % string[pos])
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	300 self.tokens = result[::-1]
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	301
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	302 self.ast = self.condition()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	303 if self.tokens:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	304 raise RuleError('Expected end of rule, got %r' %
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	305 self.tokens[-1][1])
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	306
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	307 def test(self, type, value=None):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	308 return self.tokens and self.tokens[-1][0] == type and \
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	309 (value is None or self.tokens[-1][1] == value)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	310
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	311 def skip(self, type, value=None):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	312 if self.test(type, value):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	313 return self.tokens.pop()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	314
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	315 def expect(self, type, value=None, term=None):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	316 token = self.skip(type, value)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	317 if token is not None:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	318 return token
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	319 if term is None:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	320 term = repr(value is None and type or value)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	321 if not self.tokens:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	322 raise RuleError('expected %s but end of rule reached' % term)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	323 raise RuleError('expected %s but got %r' % (term, self.tokens[-1][1]))
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	324
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	325 def condition(self):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	326 op = self.and_condition()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	327 while self.skip('word', 'or'):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	328 op = 'or', (op, self.and_condition())
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	329 return op
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	330
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	331 def and_condition(self):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	332 op = self.relation()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	333 while self.skip('word', 'and'):
390 c5bc0f6822a9 Preliminary support for timedelta formatting (see #126), and import/expose the locale plural rules from the CLDR. cmlenz parents: 387 diff changeset	334 op = 'and', (op, self.relation())
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	335 return op
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	336
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	337 def relation(self):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	338 left = self.expr()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	339 if self.skip('word', 'is'):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	340 return self.skip('word', 'not') and 'isnot' or 'is', \
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	341 (left, self.value())
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	342 negated = self.skip('word', 'not')
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	343 method = 'in'
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	344 if self.skip('word', 'within'):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	345 method = 'within'
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	346 else:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	347 self.expect('word', 'in', term="'within' or 'in'")
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	348 rv = 'relation', (method, left, self.range())
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	349 if negated:
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	350 rv = 'not', (rv,)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	351 return rv
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	352
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	353 def range(self):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	354 left = self.value()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	355 self.expect('ellipsis')
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	356 return 'range', (left, self.value())
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	357
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	358 def expr(self):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	359 self.expect('word', 'n')
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	360 if self.skip('word', 'mod'):
391 da59f8723587 Fixed a bug in plural.py that caused a traceback for some locales, changed the `__mod__` DateTimePattern to not raise exceptions but return NotImplemented. aronacher parents: 390 diff changeset	361 return 'mod', (('n', ()), self.value())
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	362 return 'n', ()
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	363
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	364 def value(self):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	365 return 'value', (int(self.expect('value')[1]),)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	366
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	367
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	368 def _binary_compiler(tmpl):
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	369 """Compiler factory for the `_Compiler`."""
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	370 return lambda self, l, r: tmpl % (self.compile(l), self.compile(r))
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	371
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	372
392 4364b76ce842 Fixed not in plural rules aronacher parents: 391 diff changeset	373 def _unary_compiler(tmpl):
4364b76ce842 Fixed not in plural rules aronacher parents: 391 diff changeset	374 """Compiler factory for the `_Compiler`."""
4364b76ce842 Fixed not in plural rules aronacher parents: 391 diff changeset	375 return lambda self, x: tmpl % self.compile(x)
4364b76ce842 Fixed not in plural rules aronacher parents: 391 diff changeset	376
4364b76ce842 Fixed not in plural rules aronacher parents: 391 diff changeset	377
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	378 class _Compiler(object):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	379 """The compilers are able to transform the expressions into multiple
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	380 output formats.
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	381 """
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	382
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	383 def compile(self, (op, args)):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	384 return getattr(self, 'compile_' + op)(*args)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	385
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	386 compile_n = lambda x: 'n'
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	387 compile_value = lambda x, v: str(v)
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	388 compile_and = _binary_compiler('(%s && %s)')
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	389 compile_or = _binary_compiler('(%s \|\| %s)')
392 4364b76ce842 Fixed not in plural rules aronacher parents: 391 diff changeset	390 compile_not = _unary_compiler('(!%s)')
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	391 compile_mod = _binary_compiler('(%s %% %s)')
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	392 compile_is = _binary_compiler('(%s == %s)')
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	393 compile_isnot = _binary_compiler('(%s != %s)')
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	394
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	395 def compile_relation(self, method, expr, range):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	396 range = '%s, %s' % tuple(map(self.compile, range[1]))
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	397 return '%s(%s, %s)' % (method.upper(), self.compile(expr), range)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	398
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	399
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	400 class _PythonCompiler(_Compiler):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	401 """Compiles an expression to Python."""
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	402
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	403 compile_and = _binary_compiler('(%s and %s)')
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	404 compile_or = _binary_compiler('(%s or %s)')
392 4364b76ce842 Fixed not in plural rules aronacher parents: 391 diff changeset	405 compile_not = _unary_compiler('(not %s)')
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	406 compile_mod = _binary_compiler('MOD(%s, %s)')
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	407
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	408
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	409 class _GettextCompiler(_Compiler):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	410 """Compile into a gettext plural expression."""
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	411
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	412 def compile_relation(self, method, expr, range):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	413 expr = self.compile(expr)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	414 min, max = map(self.compile, range[1])
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	415 return '(%s >= %s && %s <= %s)' % (expr, min, expr, max)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	416
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	417
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	418 class _JavaScriptCompiler(_GettextCompiler):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	419 """Compiles the expression to plain of JavaScript."""
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	420
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	421 def compile_relation(self, method, expr, range):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	422 code = _GettextCompiler.compile_relation(self, method, expr, range)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	423 if method == 'in':
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	424 expr = self.compile(expr)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	425 code = '(parseInt(%s) == %s && %s)' % (expr, expr, code)
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	426 return code
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	427
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	428
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	429 class _UnicodeCompiler(_Compiler):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	430 """Returns a unicode pluralization rule again."""
387 2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	431
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	432 compile_is = _binary_compiler('%s is %s')
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	433 compile_isnot = _binary_compiler('%s is not %s')
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	434 compile_and = _binary_compiler('%s and %s')
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	435 compile_or = _binary_compiler('%s or %s')
2d85d9724945 Some refactoring in plural.py aronacher parents: 386 diff changeset	436 compile_mod = _binary_compiler('%s mod %s')
386 e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	437
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	438 def compile_not(self, relation):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	439 return self.compile_relation(negated=True, *relation[1])
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	440
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	441 def compile_relation(self, method, expr, range, negated=False):
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	442 return '%s%s %s %s' % (
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	443 self.compile(expr), negated and ' not' or '',
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	444 method, '%s..%s' % tuple(map(self.compile, range[1]))
e51cabadfd93 Added pluralization support module for the plural definitions from the latest CLDR aronacher parents: diff changeset	445 )

Mercurial > babel > mirror

annotate babel/plural.py @ 579:99d51589c822 trunk