Dart Gettext

A Dart implementation of gettext, a localization framework.

Ported node-gettext package to dart.

Also works perfectly with flutter.

Features

• Supports domains, contexts and plurals
• Ships with plural forms for 136 languages
• Change locale or domain on the fly
• Emits events for internal errors, such as missing translations

Usage

import "package:gettext/gettext.dart";

final gt = new Gettext(onWarning: print);

Load messages from .json file:

new File("./en_US.json").readAsString().then(
   (data) {
       final gt = new Gettext();
       gt.addLocale(json.decode(data));
   }
);

Load messages from .mo or .po files using gettext_parser:

import 'package:gettext_parser/gettext_parser.dart' as gettextParser;

File("./en_US.mo").readAsString().then(
   (data) {
       final gt = new Gettext();
       gt.addLocale(gettextParser.mo.parse(data));
   }
);

Json file content example:

{
  "charset": "utf-8",
  "headers": {
    "mime-version": "1.0",
    "content-type": "text/plain; charset=utf-8",
    "content-transfer-encoding": "8bit",
    "language": "es-ES",
    "plural-forms": "nplurals=2; plural=(n!=1);"
  },
  "translations": {
    "": {
      "Hello": {
        "msgid": "Hello",
        "comments": {
           "translator": "Normal string"
        },
        "msgstr": [
           "Hola"
        ]
      },
      "An apple": {
        "msgid": "1 apple",
        "comments": {
           "translator": "Plural string"
        },
        "msgstr": [
           "una manzana",
           "%d manzanas"
        ]
      }
    }
  }
}

Change locale:

gt.locale = "en_US";

Change default domain:

gt.domain = "types";

Translate messages:

gt.gettext("Hello");

Translate messages with plural forms:

gt.ngettext("An apple", "%d apples", 3); // returns "%d apples"

See example

Usage with flutter

Use flutter_gettext package.

API

• addLocale(Map<String, dynamic> locale, {String domain: 'messages'})
• addTranslations(String localeName, Map<String, dynamic> translations, {String domain: 'messages'})
• setCatalog(String localeName, Catalog catalog)
• gettext(String msgid, {String domain, String context}) → String
• ngettext(String msgid, String msgplural, int count, {String domain, String context}) → String