module Locale

# File lib/locale.rb, line 323
def app_language_tags
  @@app_language_tags
end

Returns the app_language_tags. Default is nil. See set_app_language_tags for more details.

# File lib/locale.rb, line 212
def candidates(options = {})
  opts = {
    :supported_language_tags => nil,
    :current                 => current,
    :type                    => :common,
  }.merge(options)

  Thread.current[:candidates_caches] ||= {}
  Thread.current[:candidates_caches][opts] ||=
    collect_candidates(opts[:type], opts[:current],
                       opts[:supported_language_tags])
end

Returns the language tags which are variations of the current locales order by priority.

For example, if the current locales are [“fr”, “ja_JP”, “en_US”, “en-Latn-GB-VARIANT”], then returns [“fr”, “ja_JP”, “en_US”, “en-Latn-GB-VARIANT”, “en_Latn_GB”, “en_GB”, “ja”, “en”]. “en” is the default locale(You can change it using set_default). The default locale is added at the end of the list even if it isn’t exist.

Usually, this method is used to find the locale data as the path(or a kind of IDs).

• options: options as a Hash or nil.

  • :supported_language_tags - An Array of the language tags order by the priority. This option restricts the locales which are supported by the library/application. Default is nil if you don’t need to restrict the locales.

    (e.g.1) ["fr_FR", "en_GB", "en_US", ...]

  • :type - The type of language tag. :common, :rfc, :cldr, :posix and :simple are available. Default value is :common

# File lib/locale/driver/cgi.rb, line 145
def cgi=(cgi)
  set_cgi(cgi)
  cgi
end

Sets a CGI object.This is the convenient function of set_request().

This method is appeared when Locale.init(:driver => :cgi) is called.

• cgi: CGI object

• Returns: cgi

# File lib/locale.rb, line 270
def charset
  driver_module.charset || "UTF-8"
end

Gets the current charset.

This returns the current user/system charset. This value is read only, so you can’t set it by yourself.

• Returns: the current charset.

# File lib/locale.rb, line 276
def clear
  Thread.current[:current_languages] = nil
  Thread.current[:candidates_caches] = nil
  self
end

Clear current locale.

• Returns: self

# File lib/locale.rb, line 286
def clear_all
  Thread.list.each do |thread|
    thread[:current_languages] = nil
    thread[:candidates_caches] = nil
  end
  self
end

Clear all locales and charsets of all threads. This doesn’t clear the default and app_language_tags. Use Locale.default = nil to unset the default locale.

• Returns: self

# File lib/locale.rb, line 177
def current
  unless Thread.current[:current_languages]
    loc = driver_module.locales
    Thread.current[:current_languages] = loc ? loc : Locale::TagList.new([default])
  end
  Thread.current[:current_languages]
end

Gets the current locales (Locale::Tag‘s class). If the current locale is not set, this returns system/default locale.

This method returns the current language tags even if it isn’t included in app_language_tags.

Usually, the programs should use Locale.candidates to find the correct locale, not this method.

• Returns: an Array of the current locales (Locale::Tag‘s class).

# File lib/locale.rb, line 164
def current=(tag)
  set_current(tag)
  Thread.current[:current_languages]
end

Sets a current locale. This is a single argument version of Locale.set_current.

• tag: the language tag such as “ja-JP”

• Returns: an Array of the current locale (Locale::Tag‘s class).

  Locale.current = "ja-JP"
  Locale.current = "ja_JP.eucJP"
  

# File lib/locale.rb, line 121
def default
  @@default_tag || DEFAULT_LANGUAGE_TAG
end

Gets the default locale(language tag).

If the default language tag is not set, this returns nil.

• Returns: the default locale (Locale::Tag‘s class).

# File lib/locale.rb, line 111
def default=(tag)
  set_default(tag)
  @@default_tag
end

Same as Locale.set_default.

• locale: the default locale (Locale::Tag‘s class) or a String such as “ja-JP”.

• Returns: locale.

# File lib/locale.rb, line 86
def driver_module 
  Locale.init if @@driver_name.nil?
  Driver::MODULES[@@driver_name]
end

Gets the driver module.

Usually you don’t need to call this method.

• Returns: the driver module.

# File lib/locale.rb, line 67
def init(opts = {})
  if opts[:driver]
    require_driver opts[:driver]
  else
    if /cygwin|mingw|win32/ =~ RUBY_PLATFORM
      require_driver 'win32' 
    elsif /java/ =~ RUBY_PLATFORM
      require_driver 'jruby' 
    else
      require_driver 'posix' 
    end
  end
end

Initialize Locale library. Usually, you don’t need to call this directly, because this is called when Locale’s methods are called.

If you use this library with CGI or the kind of CGI. You need to call Locale.init(:driver => :cgi).

For Framework designers/programers:¶ ↑

If your framework is for WWW, call this once like: Locale.init(:driver => :cgi).

To Application programers:¶ ↑

If your framework doesn’t use ruby-locale and the application is for WWW, call this once like: Locale.init(:driver => :cgi).

To Library authors:¶ ↑

Don’t call this, even if your application is only for WWW.

• opts: Options as a Hash.

  • :driver - The driver. :cgi if you use Locale module with CGI, nil if you use system locale.

    (ex) Locale.init(:driver => :cgi)

# File lib/locale.rb, line 311
def set_app_language_tags(*tags)
  if tags[0]
    @@app_language_tags = tags.collect{|v| Locale::Tag.parse(v)}
  else
    @@app_language_tags = nil
  end
  
  clear_all
  self
end

Set the language tags which is supported by the Application. This value is same with supported_language_tags in Locale.candidates to restrict the result but is the global setting. If you set a language tag, the application works as the single locale application.

If the current locale is not included in app_language_tags, Locale.default value is used. Use Locale.set_default() to set correct language if “en” is not included in the language tags.

Set nil if clear the value.

Note that the libraries/plugins shouldn’t set this value.

(e.g.) Locale.set_app_language_tags("fr_FR", "en-GB", "en_US", ...)

# File lib/locale/driver/cgi.rb, line 133
def set_cgi(cgi)
  set_request(cgi.params["lang"], cgi.cookies["lang"],
              cgi.accept_language, cgi.accept_charset)
  self
end

Sets a CGI object. This is the convenient function of set_request().

This method is appeared when Locale.init(:driver => :cgi) is called.

• cgi: CGI object

• Returns: self

# File lib/locale.rb, line 139
def set_current(*tags)
  languages = nil
  if tags[0]
    languages = Locale::TagList.new
    tags.each do |tag|
      case tag
      when Locale::TagList
        languages.concat(tag)
      else
        languages << create_language_tag(tag)
      end
    end
  end
  Thread.current[:current_languages] = languages
  Thread.current[:candidates_caches] = nil
  self
end

Sets the locales of the current thread order by the priority. Each thread has a current locales. The system locale/default locale is used if the thread doesn’t have current locales.

• tag: Locale::Language::Tag’s class or the language tag as a String. nil if you need to clear current locales.

• charset: the charset (override the charset even if the locale name has charset) or nil.

• Returns: self

(e.g.)

Locale.set_current("ja_JP.eucJP")
Locale.set_current("ja-JP")
Locale.set_current("en_AU", "en_US", ...)
Locale.set_current(Locale::Tag::Simple.new("ja", "JP"), ...)

# File lib/locale.rb, line 98
def set_default(tag)
  Thread.list.each do |thread|
    thread[:current_languages] = nil
    thread[:candidates_caches] = nil
  end
  @@default_tag = create_language_tag(tag)
  self
end

Sets the default locale as the language tag (Locale::Tag‘s class or String(such as “ja_JP”)).

• tag: the default language_tag

• Returns: self.

# File lib/locale/driver/cgi.rb, line 122
def set_request(query_langs, cookie_langs, accept_language, accept_charset)
  driver_module.set_request(query_langs, cookie_langs, accept_language, accept_charset)
  self
end

Sets a request values for lang/charset.

• query_langs: An Array of QUERY_STRING value “lang”.

• cookie_langs: An Array of cookie value “lang”.

• accept_language: The value of HTTP_ACCEPT_LANGUAGE

• accept_charset: The value of HTTP_ACCEPT_CHARSET