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| Locale.pm |
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package Unicode::Collate::Locale;
use strict;
use Carp;
use base qw(Unicode::Collate);
our $VERSION = '0.89';
my $PL_EXT = '.pl';
my %LocaleFile = map { ($_, $_) } qw(
af ar as az be bg bn ca cs cy da eo es et fa fi fil fo fr
gu ha haw hi hr hu hy ig is ja kk kl kn ko kok ln lt lv
mk ml mr mt nb nn nso om or pa pl ro ru sa se si sk sl sq
sr sv ta te th tn to tr uk ur vi wae wo yo zh
);
$LocaleFile{'default'} = '';
# aliases
$LocaleFile{'bs'} = 'hr';
$LocaleFile{'sr_Latn'} = 'hr';
# short file names
$LocaleFile{'de__phonebook'} = 'de_phone';
$LocaleFile{'es__traditional'} = 'es_trad';
$LocaleFile{'fi__phonebook'} = 'fi_phone';
$LocaleFile{'si__dictionary'} = 'si_dict';
$LocaleFile{'sv__reformed'} = 'sv_refo';
$LocaleFile{'zh__big5han'} = 'zh_big5';
$LocaleFile{'zh__gb2312han'} = 'zh_gb';
$LocaleFile{'zh__pinyin'} = 'zh_pin';
$LocaleFile{'zh__stroke'} = 'zh_strk';
my %TypeAlias = qw(
phone phonebook
phonebk phonebook
dict dictionary
reform reformed
trad traditional
big5 big5han
gb2312 gb2312han
);
sub _locale {
my $locale = shift;
if ($locale) {
$locale = lc $locale;
$locale =~ tr/\-\ \./_/;
$locale =~ s/_([0-9a-z]+)\z/$TypeAlias{$1} ?
"_$TypeAlias{$1}" : "_$1"/e;
$LocaleFile{$locale} and return $locale;
my @code = split /_/, $locale;
my $lan = shift @code;
my $scr = @code && length $code[0] == 4 ? ucfirst shift @code : '';
my $reg = @code && length $code[0] < 4 ? uc shift @code : '';
my $var = @code ? shift @code : '';
my @list;
push @list, (
"${lan}_${scr}_${reg}_$var",
"${lan}_${scr}__$var", # empty $scr should not be ${lan}__$var.
"${lan}_${reg}_$var", # empty $reg may be ${lan}__$var.
"${lan}__$var",
) if $var ne '';
push @list, (
"${lan}_${scr}_${reg}",
"${lan}_${scr}",
"${lan}_${reg}",
${lan},
);
for my $loc (@list) {
$LocaleFile{$loc} and return $loc;
}
}
return 'default';
}
sub getlocale {
return shift->{accepted_locale};
}
sub locale_version {
return shift->{locale_version};
}
sub _fetchpl {
my $accepted = shift;
my $f = $LocaleFile{$accepted};
return if !$f;
$f .= $PL_EXT;
# allow to search @INC
# use File::Spec;
# my $path = File::Spec->catfile('Unicode', 'Collate', 'Locale', $f);
my $path = "Unicode/Collate/Locale/$f";
my $h = do $path;
croak "Unicode/Collate/Locale/$f can't be found" if !$h;
return $h;
}
sub new {
my $class = shift;
my %hash = @_;
$hash{accepted_locale} = _locale($hash{locale});
if (exists $hash{table}) {
croak "your table can't be used with Unicode::Collate::Locale";
}
my $href = _fetchpl($hash{accepted_locale});
while (my($k,$v) = each %$href) {
if (exists $hash{$k}) {
croak "$k is reserved by $hash{locale}, can't be overwritten";
}
$hash{$k} = $v;
}
return $class->SUPER::new(%hash);
}
1;
__END__
MEMORANDA for developing
locale based CLDR
----------------------------------------------------------------------------
af 2.0 = 1.8.1
ar 2.0
as 2.0 = 1.8.1
az 2.0 = 1.8.1 (type="standard")
be 2.0
bg 2.0
bn 2.0.1 (type="standard")
bs 2.0 (alias source="hr")
ca 2.0 = 1.8.1 (alt="proposed" type="standard")
cs 2.0 = 1.8.1 (type="standard")
cy 2.0 = 1.8.1
da 2.0 = 1.8.1 (type="standard") [modify aA to pass CLDR tests]
de__phonebook 2.0 (type="phonebook")
eo 2.0 = 1.8.1
es 2.0 (type="standard")
es__traditional 2.0 = 1.8.1 (type="traditional")
et 2.0 = 1.8.1
fa 2.0 = 1.8.1
fi 2.0 = 1.8.1 (type="standard" alt="proposed")
fi__phonebook 2.0 = 1.8.1 (type="phonebook")
fil 2.0 (type="standard") = 1.8.1
fo 2.0 = 1.8.1 (alt="proposed" type="standard")
fr 2.0 (fr_CA, backwards="on")
gu 2.0 (type="standard")
ha 2.0
haw 2.0 = 1.8.1
hi 2.0 (type="standard")
hr 2.0 (type="standard")
hu 2.0 = 1.8.1 (alt="proposed" type="standard")
hy 2.0 = 1.8.1
ig 2.0 = 1.8.1
is 2.0 = 1.8.1 (type="standard")
ja 2.0 = 1.8.1 (type="standard")
kk 2.0
kl 2.0 = 1.8.1 (type="standard")
kn 2.0 (type="standard")
ko 2.0 = 1.8.1 (type="standard")
kok 2.0 = 1.8.1
ln 2.0 (type="standard") = 1.8.1
lt 2.0
lv 2.0 (type="standard") = 1.8.1
mk 2.0
ml 2.0
mr 2.0 = 1.8.1
mt 2.0
nb 2.0 (type="standard")
nn 2.0 (type="standard")
nso 2.0 = 1.8.1
om 2.0 = 1.8.1
or 2.0
pa 2.0 = 1.8.1
pl 2.0 = 1.8.1
ro 2.0 (type="standard")
ru 2.0
sa 1.8.1 (type="standard" alt="proposed") [currently in /seed]
se 2.0 = 1.8.1 (type="standard")
si 2.0 (type="standard")
si__dictionary 2.0 (type="dictionary")
sk 2.0 (type="standard")
sl 2.0 = 1.8.1 (type="standard" alt="proposed")
sq 2.0 = 1.8.1 (alt="proposed" type="standard")
sr 2.0 (type="standard")
sr_Latn 2.0 = 1.8.1 (alias source="hr")
sv 2.0 (type="standard")
sv__reformed 2.0 = 1.8.1 (type="reformed")
ta 2.0
te 2.0
th 2.0 (type="standard")
tn 2.0 = 1.8.1
to 2.0 = 1.8.1 (type="standard" alt="proposed")
tr 2.0 = 1.8.1 (type="standard")
uk 2.0
ur 2.0
vi 2.0 = 1.8.1
wae 2.0
wo 1.8.1 [currently in /seed]
yo 2.0 = 1.8.1
zh 2.0 = 1.8.1 (type="standard")
zh__big5han 2.0 = 1.8.1 (type="big5han")
zh__gb2312han 2.0 = 1.8.1 (type="gb2312han")
zh__pinyin 2.0 (type='pinyin' alt='short')
zh__stroke 2.0 = 1.9.1 (type='stroke' alt='short')
----------------------------------------------------------------------------
=head1 NAME
Unicode::Collate::Locale - Linguistic tailoring for DUCET via Unicode::Collate
=head1 SYNOPSIS
use Unicode::Collate::Locale;
#construct
$Collator = Unicode::Collate::Locale->
new(locale => $locale_name, %tailoring);
#sort
@sorted = $Collator->sort(@not_sorted);
#compare
$result = $Collator->cmp($a, $b); # returns 1, 0, or -1.
B<Note:> Strings in C<@not_sorted>, C<$a> and C<$b> are interpreted
according to Perl's Unicode support. See L<perlunicode>,
L<perluniintro>, L<perlunitut>, L<perlunifaq>, L<utf8>.
Otherwise you can use C<preprocess> (cf. C<Unicode::Collate>)
or should decode them before.
=head1 DESCRIPTION
This module provides linguistic tailoring for it
taking advantage of C<Unicode::Collate>.
=head2 Constructor
The C<new> method returns a collator object.
A parameter list for the constructor is a hash, which can include
a special key C<locale> and its value (case-insensitive) standing
for a Unicode base language code (two or three-letter).
For example, C<Unicode::Collate::Locale-E<gt>new(locale =E<gt> 'FR')>
returns a collator tailored for French.
C<$locale_name> may be suffixed with a Unicode script code (four-letter),
a Unicode region code, a Unicode language variant code. These codes are
case-insensitive, and separated with C<'_'> or C<'-'>.
E.g. C<en_US> for English in USA,
C<az_Cyrl> for Azerbaijani in the Cyrillic script,
C<es_ES_traditional> for Spanish in Spain (Traditional).
If C<$locale_name> is not available,
fallback is selected in the following order:
1. language with a variant code
2. language with a script code
3. language with a region code
4. language
5. default
Tailoring tags provided by C<Unicode::Collate> are allowed as long as
they are not used for C<locale> support. Esp. the C<table> tag
is always untailorable, since it is reserved for DUCET.
E.g. a collator for French, which ignores diacritics and case difference
(i.e. level 1), with reversed case ordering and no normalization.
Unicode::Collate::Locale->new(
level => 1,
locale => 'fr',
upper_before_lower => 1,
normalization => undef
)
Overriding a behavior already tailored by C<locale> is disallowed
if such a tailoring is passed to C<new()>.
Unicode::Collate::Locale->new(
locale => 'da',
upper_before_lower => 0, # causes error as reserved by 'da'
)
However C<change()> inherited from C<Unicode::Collate> allows
such a tailoring that is reserved by C<locale>. Examples:
new(locale => 'ca')->change(backwards => undef)
new(locale => 'da')->change(upper_before_lower => 0)
new(locale => 'ja')->change(overrideCJK => undef)
=head2 Methods
C<Unicode::Collate::Locale> is a subclass of C<Unicode::Collate>
and methods other than C<new> are inherited from C<Unicode::Collate>.
Here is a list of additional methods:
=over 4
=item C<$Collator-E<gt>getlocale>
Returns a language code accepted and used actually on collation.
If linguistic tailoring is not provided for a language code you passed
(intensionally for some languages, or due to the incomplete implementation),
this method returns a string C<'default'> meaning no special tailoring.
=item C<$Collator-E<gt>locale_version>
(Since Unicode::Collate::Locale 0.87)
Returns the version number (perhaps C</\d\.\d\d/>) of the locale, as that
of F<Locale/*.pl>.
B<Note:> F<Locale/*.pl> that a collator uses should be identified by
a combination of return values from C<getlocale> and C<locale_version>.
=back
=head2 A list of tailorable locales
locale name description
--------------------------------------------------------------
af Afrikaans
ar Arabic
as Assamese
az Azerbaijani (Azeri)
be Belarusian
bg Bulgarian
bn Bengali
bs Bosnian
ca Catalan
cs Czech
cy Welsh
da Danish
de__phonebook German (umlaut as 'ae', 'oe', 'ue')
eo Esperanto
es Spanish
es__traditional Spanish ('ch' and 'll' as a grapheme)
et Estonian
fa Persian
fi Finnish (v and w are primary equal)
fi__phonebook Finnish (v and w as separate characters)
fil Filipino
fo Faroese
fr French
gu Gujarati
ha Hausa
haw Hawaiian
hi Hindi
hr Croatian
hu Hungarian
hy Armenian
ig Igbo
is Icelandic
ja Japanese [1]
kk Kazakh
kl Kalaallisut
kn Kannada
ko Korean [2]
kok Konkani
ln Lingala
lt Lithuanian
lv Latvian
mk Macedonian
ml Malayalam
mr Marathi
mt Maltese
nb Norwegian Bokmal
nn Norwegian Nynorsk
nso Northern Sotho
om Oromo
or Oriya
pa Punjabi
pl Polish
ro Romanian
ru Russian
sa Sanskrit
se Northern Sami
si Sinhala
si__dictionary Sinhala (U+0DA5 = U+0DA2,0DCA,0DA4)
sk Slovak
sl Slovenian
sq Albanian
sr Serbian
sr_Latn Serbian in Latin (tailored as Croatian)
sv Swedish (v and w are primary equal)
sv__reformed Swedish (v and w as separate characters)
ta Tamil
te Telugu
th Thai
tn Tswana
to Tonga
tr Turkish
uk Ukrainian
ur Urdu
vi Vietnamese
wae Walser
wo Wolof
yo Yoruba
zh Chinese
zh__big5han Chinese (ideographs: big5 order)
zh__gb2312han Chinese (ideographs: GB-2312 order)
zh__pinyin Chinese (ideographs: pinyin order) [3]
zh__stroke Chinese (ideographs: stroke order) [3]
--------------------------------------------------------------
Locales according to the default UCA rules include
chr (Cherokee),
de (German),
en (English),
ga (Irish),
id (Indonesian),
it (Italian),
ka (Georgian),
ms (Malay),
nl (Dutch),
pt (Portuguese),
st (Southern Sotho),
sw (Swahili),
xh (Xhosa),
zu (Zulu).
B<Note>
[1] ja: Ideographs are sorted in JIS X 0208 order.
Fullwidth and halfwidth forms are identical to their normal form.
The difference between hiragana and katakana is at the 4th level,
the comparison also requires C<(variable =E<gt> 'Non-ignorable')>,
and then C<katakana_before_hiragana> has no effect.
[2] ko: Plenty of ideographs are sorted by their reading. Such
an ideograph is primary (level 1) equal to, and secondary (level 2)
greater than, the corresponding hangul syllable.
[3] zh__pinyin and zh__stroke: implemented alt='short', where
a smaller number of ideographs are tailored.
=head1 INSTALL
Installation of C<Unicode::Collate::Locale> requires F<Collate/Locale.pm>,
F<Collate/Locale/*.pm>, F<Collate/CJK/*.pm> and F<Collate/allkeys.txt>.
On building, C<Unicode::Collate::Locale> doesn't require any of F<data/*.txt>,
F<gendata/*>, and F<mklocale>.
Tests for C<Unicode::Collate::Locale> are named F<t/loc_*.t>.
=head1 CAVEAT
=over 4
=item tailoring is not maximum
Even if a certain letter is tailored, its equivalent would not always
tailored as well as it. For example, even though W is tailored,
fullwidth W (C<U+FF37>), W with acute (C<U+1E82>), etc. are not
tailored. The result may depend on whether source strings are
normalized or not, and whether decomposed or composed.
Thus C<(normalization =E<gt> undef)> is less preferred.
=back
=head1 AUTHOR
The Unicode::Collate::Locale module for perl was written
by SADAHIRO Tomoyuki, <SADAHIRO@cpan.org>.
This module is Copyright(C) 2004-2012, SADAHIRO Tomoyuki. Japan.
All rights reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
=over 4
=item Unicode Collation Algorithm - UTS #10
L<http://www.unicode.org/reports/tr10/>
=item The Default Unicode Collation Element Table (DUCET)
L<http://www.unicode.org/Public/UCA/latest/allkeys.txt>
=item Unicode Locale Data Markup Language (LDML) - UTS #35
L<http://www.unicode.org/reports/tr35/>
=item CLDR - Unicode Common Locale Data Repository
L<http://cldr.unicode.org/>
=item L<Unicode::Collate>
=item L<Unicode::Normalize>
=back
=cut
| .. | |||||
| Locale.pm |