/ 
Locale-Utils-PluralForms-0.003
River stage zero No dependents
/ Locale::Utils::PluralForms

NAME

Locale::Utils::PluralForms - Utils to use plural forms

VERSION

0.003

SYNOPSIS

use Locale::Utils::PluralForms;

my $obj = Locale::Utils::PluralForms->new;

Data downloaded from web

$obj = Locale::Utils::PluralForms->new(
    language => 'en_GB', # fallbacks from given en_GB to en
);

Data of given data structure

$obj = Locale::Utils::PluralForms->new(
    all_plural_forms => {
        'en' => {
            english_name => 'English',
            plural_forms => 'nplurals=2; plural=(n != 1)',
        },
        # next languages
    },
);

Getter

my $language         = $obj->language;
my $all_plural_forms = $obj->all_plural_forms;
my $plural_forms     = $obj->plural_forms;
my $nplurals         = $obj->nplurals;
my $plural_code      = $obj->plural_code;
my $plural           = $obj->plural_code->($number);

DESCRIPTION

Find plural forms for the language

This module helps to find the plural forms for all languages. It downloads the plural forms for all languages from web. Then it stores the extracted data into a data structure named "all_plural_forms".

It is possible to fill that data structure before method "language" is called first time or to cache after first method call "language".

"plural" as subroutine

In the header of a PO- or MO-File is an entry is called "Plural-Forms". How many plural forms the language has, is described there in "nplurals". The second Information in "Plural-Forms" describes as a formula, how to choose the "plural".

This module compiles plural forms to a code references in a secure way.

SUBROUTINES/METHODS

Find plural forms for the language

method language

Set the language to switch to the plural forms of that language. "plural_forms" is set then and "nplurals" and "plural_code" will be calculated.

$obj->language('de_AT'); # A fallback finds plural forms of language de
                         # because de_AT is not different.

Read the language back.

$obj->language eq 'de_AT';

method all_plural_forms

Set the data structure.

$obj->all_plural_forms({
    'de' => {
        english_name => 'German',
        plural_forms => 'nplurals=2; plural=(n != 1)',
    },
    # next languages
});

Read the data structure back.

my $hash_ref = $obj->all_plural_forms;

executable plural forms

method plural_forms

Set "plural_forms" if no "language" is set. After that "nplurals" and "plural_code" will be calculated in a safe way.

$obj->plural_forms('nplurals=1; plural=0');

Or read it back.

my $plural_forms = $obj->plural_forms;

method nplurals

This method get back the calculated count of plurals.

If no "language" and no "plural_forms" is set, the defaults for "nplurals" is:

my $count = $obj->nplurals # returns: 1

There is no public setter for "nplurals" and it is not possible to set them in the constructor. Call method "language" or "plural_forms" or set attribute "language" or "plural_forms" in the constructor. After that "nplurals" will be calculated automaticly and safe.

method plural_code

This method get back the calculated code for the "plural" to choose the correct "plural".

If no "language" and no "plural_forms" is set, the defaults for plural_code is:

my $code_ref = $obj->plural_code # returns: sub { return 0 }
my $plural   = $obj->plural_code->($number); # returns 0

There is no public setter for "plural_code" and it is not possible to set them in the constructor. Call method "language" or "plural_forms" or set attribute "language" or "plural_forms" in the constructor. After that "plural_code" will be calculated automaticly and safe.

For the example plural forms 'nplurals=2; plural=(n != 1)':

$plural = $obj->plural_code->(0), # $plural is 1
$plural = $obj->plural_code->(1), # $plural is 0
$plural = $obj->plural_code->(2), # $plural is 1
$plural = $obj->plural_code->(3), # $plural is 1
...

EXAMPLE

Inside of this distribution is a directory named example. Run the *.pl files.

DIAGNOSTICS

none

CONFIGURATION AND ENVIRONMENT

none

DEPENDENCIES

Moose

MooseX::StrictConstructor

namespace::autoclean

English

HTML::Entities

LWP::UserAgent

Safe

INCOMPATIBILITIES

not known

BUGS AND LIMITATIONS

not known

SEE ALSO

http://en.wikipedia.org/wiki/Gettext

http://docs.translatehouse.org/projects/localization-guide/en/latest/l10n/pluralforms.html

Locele::TextDomain

AUTHOR

Steffen Winkler

LICENSE AND COPYRIGHT

Copyright (c) 2011 - 2022, Steffen Winkler <steffenw at cpan.org>. All rights reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.