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/*
* noVNC: HTML5 VNC client
* Copyright (C) 2012 Joel Martin
* Licensed under MPL 2.0 (see LICENSE.txt)
*
* See README.md for usage and integration instructions.
*/
/*
* Localization Utilities
*/
export function Localizer() {
// Currently configured language
this.language = 'en';
// Current dictionary of translations
this.dictionary = undefined;
}
Localizer.prototype = {
// Configure suitable language based on user preferences
setup: function (supportedLanguages) {
var userLanguages;
this.language = 'en'; // Default: US English
/*
* Navigator.languages only available in Chrome (32+) and FireFox (32+)
* Fall back to navigator.language for other browsers
*/
if (typeof window.navigator.languages == 'object') {
userLanguages = window.navigator.languages;
} else {
userLanguages = [navigator.language || navigator.userLanguage];
}
for (var i = 0;i < userLanguages.length;i++) {
var userLang = userLanguages[i];
userLang = userLang.toLowerCase();
userLang = userLang.replace("_", "-");
userLang = userLang.split("-");
// Built-in default?
if ((userLang[0] === 'en') &&
((userLang[1] === undefined) || (userLang[1] === 'us'))) {
return;
}
// First pass: perfect match
for (var j = 0;j < supportedLanguages.length;j++) {
var supLang = supportedLanguages[j];
supLang = supLang.toLowerCase();
supLang = supLang.replace("_", "-");
supLang = supLang.split("-");
if (userLang[0] !== supLang[0])
continue;
if (userLang[1] !== supLang[1])
continue;
this.language = supportedLanguages[j];
return;
}
// Second pass: fallback
for (var j = 0;j < supportedLanguages.length;j++) {
supLang = supportedLanguages[j];
supLang = supLang.toLowerCase();
supLang = supLang.replace("_", "-");
supLang = supLang.split("-");
if (userLang[0] !== supLang[0])
continue;
if (supLang[1] !== undefined)
continue;
this.language = supportedLanguages[j];
return;
}
}
},
// Retrieve localised text
get: function (id) {
if (typeof this.dictionary !== 'undefined' && this.dictionary[id]) {
return this.dictionary[id];
} else {
return id;
}
},
// Traverses the DOM and translates relevant fields
// See https://html.spec.whatwg.org/multipage/dom.html#attr-translate
translateDOM: function () {
var self = this;
function process(elem, enabled) {
function isAnyOf(searchElement, items) {
return items.indexOf(searchElement) !== -1;
}
function translateAttribute(elem, attr) {
var str = elem.getAttribute(attr);
str = self.get(str);
elem.setAttribute(attr, str);
}
function translateTextNode(node) {
var str = node.data.trim();
str = self.get(str);
node.data = str;
}
if (elem.hasAttribute("translate")) {
if (isAnyOf(elem.getAttribute("translate"), ["", "yes"])) {
enabled = true;
} else if (isAnyOf(elem.getAttribute("translate"), ["no"])) {
enabled = false;
}
}
if (enabled) {
if (elem.hasAttribute("abbr") &&
elem.tagName === "TH") {
translateAttribute(elem, "abbr");
}
if (elem.hasAttribute("alt") &&
isAnyOf(elem.tagName, ["AREA", "IMG", "INPUT"])) {
translateAttribute(elem, "alt");
}
if (elem.hasAttribute("download") &&
isAnyOf(elem.tagName, ["A", "AREA"])) {
translateAttribute(elem, "download");
}
if (elem.hasAttribute("label") &&
isAnyOf(elem.tagName, ["MENUITEM", "MENU", "OPTGROUP",
"OPTION", "TRACK"])) {
translateAttribute(elem, "label");
}
// FIXME: Should update "lang"
if (elem.hasAttribute("placeholder") &&
isAnyOf(elem.tagName, ["INPUT", "TEXTAREA"])) {
translateAttribute(elem, "placeholder");
}
if (elem.hasAttribute("title")) {
translateAttribute(elem, "title");
}
if (elem.hasAttribute("value") &&
elem.tagName === "INPUT" &&
isAnyOf(elem.getAttribute("type"), ["reset", "button", "submit"])) {
translateAttribute(elem, "value");
}
}
for (var i = 0;i < elem.childNodes.length;i++) {
var node = elem.childNodes[i];
if (node.nodeType === node.ELEMENT_NODE) {
process(node, enabled);
} else if (node.nodeType === node.TEXT_NODE && enabled) {
translateTextNode(node);
}
}
}
process(document.body, true);
},
};
export var l10n = new Localizer();
export default l10n.get.bind(l10n);
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