Lang.js
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/* Copyright (c) 2006-2011 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the Clear BSD license.
* See http://svn.openlayers.org/trunk/openlayers/license.txt for the
* full text of the license. */
/**
* @requires OpenLayers/BaseTypes.js
* @requires OpenLayers/Console.js
*/
/**
* Namespace: OpenLayers.Lang
* Internationalization namespace. Contains dictionaries in various languages
* and methods to set and get the current language.
*/
OpenLayers.Lang = {
/**
* Property: code
* {String} Current language code to use in OpenLayers. Use the
* <setCode> method to set this value and the <getCode> method to
* retrieve it.
*/
code: null,
/**
* APIProperty: defaultCode
* {String} Default language to use when a specific language can't be
* found. Default is "en".
*/
defaultCode: "en",
/**
* APIFunction: getCode
* Get the current language code.
*
* Returns:
* The current language code.
*/
getCode: function() {
if(!OpenLayers.Lang.code) {
OpenLayers.Lang.setCode();
}
return OpenLayers.Lang.code;
},
/**
* APIFunction: setCode
* Set the language code for string translation. This code is used by
* the <OpenLayers.Lang.translate> method.
*
* Parameters-
* code - {String} These codes follow the IETF recommendations at
* http://www.ietf.org/rfc/rfc3066.txt. If no value is set, the
* browser's language setting will be tested. If no <OpenLayers.Lang>
* dictionary exists for the code, the <OpenLayers.String.defaultLang>
* will be used.
*/
setCode: function(code) {
var lang;
if(!code) {
code = (OpenLayers.BROWSER_NAME == "msie") ?
navigator.userLanguage : navigator.language;
}
var parts = code.split('-');
parts[0] = parts[0].toLowerCase();
if(typeof OpenLayers.Lang[parts[0]] == "object") {
lang = parts[0];
}
// check for regional extensions
if(parts[1]) {
var testLang = parts[0] + '-' + parts[1].toUpperCase();
if(typeof OpenLayers.Lang[testLang] == "object") {
lang = testLang;
}
}
if(!lang) {
OpenLayers.Console.warn(
'Failed to find OpenLayers.Lang.' + parts.join("-") +
' dictionary, falling back to default language'
);
lang = OpenLayers.Lang.defaultCode;
}
OpenLayers.Lang.code = lang;
},
/**
* APIMethod: translate
* Looks up a key from a dictionary based on the current language string.
* The value of <getCode> will be used to determine the appropriate
* dictionary. Dictionaries are stored in <OpenLayers.Lang>.
*
* Parameters:
* key - {String} The key for an i18n string value in the dictionary.
* context - {Object} Optional context to be used with
* <OpenLayers.String.format>.
*
* Returns:
* {String} A internationalized string.
*/
translate: function(key, context) {
var dictionary = OpenLayers.Lang[OpenLayers.Lang.getCode()];
var message = dictionary && dictionary[key];
if(!message) {
// Message not found, fall back to message key
message = key;
}
if(context) {
message = OpenLayers.String.format(message, context);
}
return message;
}
};
/**
* APIMethod: OpenLayers.i18n
* Alias for <OpenLayers.Lang.translate>. Looks up a key from a dictionary
* based on the current language string. The value of
* <OpenLayers.Lang.getCode> will be used to determine the appropriate
* dictionary. Dictionaries are stored in <OpenLayers.Lang>.
*
* Parameters:
* key - {String} The key for an i18n string value in the dictionary.
* context - {Object} Optional context to be used with
* <OpenLayers.String.format>.
*
* Returns:
* {String} A internationalized string.
*/
OpenLayers.i18n = OpenLayers.Lang.translate;