makes dynamic translation messages readable for the gettext parser. _(fruit) cannot be understood by the gettext parser. To help the parser find all your translations, you can add fruit = N_("Apple") which does not translate, but tells the parser: “Apple” needs translation.

• msgid: the message id.

• Returns: msgid.

# File lib/gettext.rb, line 233
def N_(msgid)
  msgid
end

This is same function as #N_ but for ngettext.

• msgid: the message id.

• msgid_plural: the plural message id.

• Returns: msgid.

# File lib/gettext.rb, line 241
def Nn_(msgid, msgid_plural)
  [msgid, msgid_plural]
end

bindtextdomain(domainname, options = {})

Bind a text domain(%{path}/%{locale}/LC_MESSAGES/%{domainname}.mo) to your program. Normally, the texdomain scope becomes the class/module(and parent classes/included modules).

• domainname: the text domain name.

• options: options as an Hash.

  • :path - the path to the mo-files. When the value is nil, it will search default paths such as /usr/share/locale, /usr/local/share/locale)

  • :output_charset - The output charset. Same with #set_output_charset. Usually, L10n library doesn't use this option. Application may use this once.

• Returns: the GetText::TextDomainManager.

# File lib/gettext.rb, line 52
def bindtextdomain(domainname, *options)
  bindtextdomain_to(self, domainname, *options)
end

Includes GetText module and bind a text domain to a class.

• klass: the target ruby class.

• domainname: the text domain name.

• options: options as an Hash. See #bindtextdomain.

# File lib/gettext.rb, line 60
def bindtextdomain_to(klass, domainname, *options)
  if options[0].kind_of? Hash
    opts = options[0]
  else
    # for backward compatibility.
    opts = {}
    opts[:path] = options[0] if options[0]
    opts[:output_charset] = options[2] if options[2]
  end
  unless (klass.kind_of? GetText or klass.include? GetText)
    klass.__send__(:include, GetText)
  end
  TextDomainManager.bind_to(klass, domainname, opts)
end

Gets the CGI object. If it is nil, returns new CGI object. This methods is appeared when requiring “gettext/cgi”.

• Returns: the CGI object

# File lib/gettext/cgi.rb, line 35
def cgi
  Locale.cgi
end

Same as #set_cgi. This methods is appeared when requiring “gettext/cgi”.

• cgi_: CGI object

• Returns: cgi_

# File lib/gettext/cgi.rb, line 28
def cgi=(cgi_)
  set_cgi(cgi_)
  cgi_
end

Translates msgid and return the message. This doesn't make a copy of the message.

You need to use String#dup if you want to modify the return value with destructive functions.

(e.g.1) _(“Hello ”).dup << “world”

But e.g.1 should be rewrite to:

(e.g.2) _(“Hello %{val}”) % {:val => “world”}

Because the translator may want to change the position of “world”.

• msgid: the message id.

• Returns: localized text by msgid. If there are not binded mo-file, it will return msgid.

# File lib/gettext.rb, line 116
def gettext(msgid)
  TextDomainManager.translate_singular_message(self, msgid)
end

The ngettext is similar to the gettext function as it finds the message catalogs in the same way. But it takes two extra arguments for plural form.

• msgid: the singular form.

• msgid_plural: the plural form.

• n: a number used to determine the plural form.

• Returns: the localized text which key is msgid_plural if n is plural(follow plural-rule) or msgid. “plural-rule” is defined in po-file.

# File lib/gettext.rb, line 168
def ngettext(msgid, msgid_plural, n = nil)
  TextDomainManager.translate_plural_message(self, msgid, msgid_plural, n)
end

The npgettext is similar to the nsgettext function.

e.g.) np_("Special", "An apple", "%{num} Apples", num) == ns_("Special|An apple", "%{num} Apples", num)

• msgctxt: the message context.

• msgid: the singular form.

• msgid_plural: the plural form.

• n: a number used to determine the plural form.

• Returns: the localized text which key is msgid_plural if n is plural(follow plural-rule) or msgid. “plural-rule” is defined in po-file.

# File lib/gettext.rb, line 205
def npgettext(msgctxt, msgids, arg2 = nil, arg3 = nil)
  if msgids.kind_of?(Array)
    msgid = msgids[0]
    msgid_ctxt = "#{msgctxt}\004#{msgid}"
    msgid_plural = msgids[1]
    opt1 = arg2
    opt2 = arg3
  else
    msgid = msgids
    msgid_ctxt = "#{msgctxt}\004#{msgid}"
    msgid_plural = arg2
    opt1 = arg3
    opt2 = nil
  end

  msgstr = TextDomainManager.translate_plural_message(self, msgid_ctxt, msgid_plural, opt1, opt2)
  if msgstr == msgid_ctxt
    msgid
  else
    msgstr
  end
end

The nsgettext is similar to the ngettext. But if there are no localized text, it returns a last part of msgid separeted “div”.

• msgid: the singular form with “div”. (e.g. “Special|An apple”)

• msgid_plural: the plural form. (e.g. “%{num} Apples”)

• n: a number used to determine the plural form.

• Returns: the localized text which key is msgid_plural if n is plural(follow plural-rule) or msgid. “plural-rule” is defined in po-file.

# File lib/gettext.rb, line 187
def nsgettext(msgid, msgid_plural, n="|", seperator = "|")
  TextDomainManager.translate_plural_message(self, msgid, msgid_plural, n, seperator)
end

Gets the current #output_charset which is set using #set_output_charset.

• Returns: output_charset.

# File lib/gettext.rb, line 256
def output_charset
  TextDomainManager.output_charset
end

Translates msgid with msgctxt. This methods is similer with s_().

e.g.) p_("File", "New")   == s_("File|New")
      p_("File", "Open")  == s_("File|Open")

• msgctxt: the message context.

• msgid: the message id.

• Returns: the localized text by msgid. If there are no localized text, it returns msgid.

See: www.gnu.org/software/autoconf/manual/gettext/Contexts.html

# File lib/gettext.rb, line 150
def pgettext(msgctxt, msgid)
  TextDomainManager.translate_singular_message(self, "#{msgctxt}\004#{msgid}", "\004")
end

Sets a CGI object. This methods is appeared when requiring “gettext/cgi”.

• cgi_: CGI object

• Returns: self

# File lib/gettext/cgi.rb, line 21
def set_cgi(cgi_)
  Locale.set_cgi(cgi_)
end

Set the locale to the current thread. Note that if set_locale is set, this value is ignored. If you need, #set_locale(nil); #set_current_locale(lang)

# File lib/gettext.rb, line 272
def set_current_locale(lang)
  Locale.current = lang
end

Set the locale. This value forces the locale whole the programs. This method calls Locale.set_app_language_tags, Locale.default, Locale.current. Use Locale methods if you need to handle locales more flexible.

# File lib/gettext.rb, line 263
def set_locale(lang)
  Locale.set_app_language_tags(lang)
  Locale.default = lang
  Locale.current = lang
end

Sets charset(String) such as “euc-jp”, “sjis”, “CP932”, “utf-8”, … You shouldn't use this in your own Libraries.

• charset: an #output_charset

• Returns: self

# File lib/gettext.rb, line 249
def set_output_charset(charset)
  TextDomainManager.output_charset = charset
  self
end

Translates msgid, but if there are no localized text, it returns a last part of msgid separeted “div”.

• msgid: the message id.

• separator: separator or nil for no seperation.

• Returns: the localized text by msgid. If there are no localized text, it returns a last part of the msgid separeted by “seperator”. Movie|Location -> Location

See: www.gnu.org/software/gettext/manual/html_mono/gettext.html#SEC151

# File lib/gettext.rb, line 133
def sgettext(msgid, seperator = "|")
  TextDomainManager.translate_singular_message(self, msgid, seperator)
end