/*

Copyright (c) 2003-2009, CKSource - Frederico Knabben. All rights reserved.

For licensing, see LICENSE.html or http://ckeditor.com/license

*/



(function()

{

	var loadedLangs = {};



	CKEDITOR.lang =

	{

		/**

		 * The list of languages available in the editor core.

		 * @type Object

		 * @example

		 * alert( CKEDITOR.lang.en );  // "true"

		 */

		languages :

		{

			'af'	: 1,

			'ar'	: 1,

			'bg'	: 1,

			'bn'	: 1,

			'bs'	: 1,

			'ca'	: 1,

			'cs'	: 1,

			'da'	: 1,

			'de'	: 1,

			'el'	: 1,

			'en-au'	: 1,

			'en-ca'	: 1,

			'en-uk'	: 1,

			'en'	: 1,

			'eo'	: 1,

			'es'	: 1,

			'et'	: 1,

			'eu'	: 1,

			'fa'	: 1,

			'fi'	: 1,

			'fo'	: 1,

			'fr-ca'	: 1,

			'fr'	: 1,

			'gl'	: 1,

			'gu'	: 1,

			'he'	: 1,

			'hi'	: 1,

			'hr'	: 1,

			'hu'	: 1,

			'is'	: 1,

			'it'	: 1,

			'ja'	: 1,

			'km'	: 1,

			'ko'	: 1,

			'lt'	: 1,

			'lv'	: 1,

			'mn'	: 1,

			'ms'	: 1,

			'nb'	: 1,

			'nl'	: 1,

			'no'	: 1,

			'pl'	: 1,

			'pt-br'	: 1,

			'pt'	: 1,

			'ro'	: 1,

			'ru'	: 1,

			'sk'	: 1,

			'sl'	: 1,

			'sr-latn'	: 1,

			'sr'	: 1,

			'sv'	: 1,

			'th'	: 1,

			'tr'	: 1,

			'uk'	: 1,

			'vi'	: 1,

			'zh-cn'	: 1,

			'zh'	: 1

		},



		/**

		 * Loads a specific language file, or auto detect it. A callback is

		 * then called when the file gets loaded.

		 * @param {String} languageCode The code of the language file to be

		 *		loaded. If "autoDetect" is set to true, this language will be

		 *		used as the default one, if the detect language is not

		 *		available in the core.

		 * @param {Boolean} autoDetect Indicates that the function must try to

		 *		detect the user language and load it instead.

		 * @param {Function} callback The function to be called once the

		 *		language file is loaded. Two parameters are passed to this

		 *		function: the language code and the loaded language entries.

		 * @example

		 */

		load : function( languageCode, defaultLanguage, callback )

		{

			if ( !languageCode )

				languageCode = this.detect( defaultLanguage );



			if ( !this[ languageCode ] )

			{

				CKEDITOR.scriptLoader.load( CKEDITOR.getUrl(

					'lang/' + languageCode + '.js' ),

					function()

						{

							callback( languageCode, this[ languageCode ] );

						}

						, this );

			}

			else

				callback( languageCode, this[ languageCode ] );

		},



		/**

		 * Returns the language that best fit the user language. For example,

		 * suppose that the user language is "pt-br". If this language is

		 * supported by the editor, it is returned. Otherwise, if only "pt" is

		 * supported, it is returned instead. If none of the previous are

		 * supported, a default language is then returned.

		 * @param {String} defaultLanguage The default language to be returned

		 *		if the user language is not supported.

		 * @returns {String} The detected language code.

		 * @example

		 * alert( CKEDITOR.lang.detect( 'en' ) );  // e.g., in a German browser: "de"

		 */

		detect : function( defaultLanguage )

		{

			var languages = this.languages;



			var parts = ( navigator.userLanguage || navigator.language )

					.toLowerCase()

					.match( /([a-z]+)(?:-([a-z]+))?/ ),

				lang = parts[1],

				locale = parts[2];



			if ( languages[ lang + '-' + locale ] )

				lang = lang + '-' + locale;

			else if ( !languages[ lang ] )

				lang = null;



			CKEDITOR.lang.detect = lang ?

				function() { return lang; } :

				function( defaultLanguage ) { return defaultLanguage; };



			return lang || defaultLanguage;

		}

	};



})();