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1029 lines
28 KiB
1029 lines
28 KiB
/**
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* Copyright (c) 2011-2013 Fabien Cazenave, Mozilla.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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/*jshint browser: true, devel: true, es5: true, globalstrict: true */
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'use strict';
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define(function (require) {
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var gL10nData = {};
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var gTextData = '';
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var gTextProp = 'textContent';
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var gLanguage = '';
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var gMacros = {};
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var gReadyState = 'loading';
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/**
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* Synchronously loading l10n resources significantly minimizes flickering
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* from displaying the app with non-localized strings and then updating the
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* strings. Although this will block all script execution on this page, we
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* expect that the l10n resources are available locally on flash-storage.
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*
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* As synchronous XHR is generally considered as a bad idea, we're still
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* loading l10n resources asynchronously -- but we keep this in a setting,
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* just in case... and applications using this library should hide their
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* content until the `localized' event happens.
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*/
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var gAsyncResourceLoading = true; // read-only
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/**
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* Debug helpers
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*
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* gDEBUG == 0: don't display any console message
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* gDEBUG == 1: display only warnings, not logs
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* gDEBUG == 2: display all console messages
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*/
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var gDEBUG = 1;
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function consoleLog(message) {
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if (gDEBUG >= 2) {
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console.log('[l10n] ' + message);
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}
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};
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function consoleWarn(message) {
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if (gDEBUG) {
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console.warn('[l10n] ' + message);
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}
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};
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/**
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* DOM helpers for the so-called "HTML API".
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*
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* These functions are written for modern browsers. For old versions of IE,
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* they're overridden in the 'startup' section at the end of this file.
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*/
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function getL10nResourceLinks() {
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return document.querySelectorAll('link[type="application/l10n"]');
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}
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function getL10nDictionary() {
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var script = document.querySelector('script[type="application/l10n"]');
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// TODO: support multiple and external JSON dictionaries
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return script ? JSON.parse(script.innerHTML) : null;
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}
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function getTranslatableChildren(element) {
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return element ? element.querySelectorAll('*[data-l10n-id]') : [];
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}
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function getL10nAttributes(element) {
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if (!element)
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return {};
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var l10nId = element.getAttribute('data-l10n-id');
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var l10nArgs = element.getAttribute('data-l10n-args');
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var args = {};
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if (l10nArgs) {
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try {
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args = JSON.parse(l10nArgs);
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} catch (e) {
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consoleWarn('could not parse arguments for #' + l10nId);
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}
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}
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return { id: l10nId, args: args };
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}
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function fireL10nReadyEvent(lang) {
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var evtObject = document.createEvent('Event');
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evtObject.initEvent('localized', true, false);
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evtObject.language = lang;
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document.dispatchEvent(evtObject);
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}
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function xhrLoadText(url, onSuccess, onFailure, asynchronous) {
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onSuccess = onSuccess || function _onSuccess(data) {};
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onFailure = onFailure || function _onFailure() {
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consoleWarn(url + ' not found.');
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};
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var xhr = new XMLHttpRequest();
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xhr.open('GET', url, asynchronous);
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if (xhr.overrideMimeType) {
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xhr.overrideMimeType('text/plain; charset=utf-8');
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}
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xhr.onreadystatechange = function() {
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if (xhr.readyState == 4) {
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if (xhr.status == 200 || xhr.status === 0) {
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onSuccess(xhr.responseText);
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} else {
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onFailure();
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}
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}
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};
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xhr.onerror = onFailure;
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xhr.ontimeout = onFailure;
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// in Firefox OS with the app:// protocol, trying to XHR a non-existing
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// URL will raise an exception here -- hence this ugly try...catch.
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try {
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xhr.send(null);
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} catch (e) {
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onFailure();
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}
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}
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/**
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* l10n resource parser:
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* - reads (async XHR) the l10n resource matching `lang';
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* - imports linked resources (synchronously) when specified;
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* - parses the text data (fills `gL10nData' and `gTextData');
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* - triggers success/failure callbacks when done.
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*
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* @param {string} href
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* URL of the l10n resource to parse.
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*
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* @param {string} lang
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* locale (language) to parse.
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*
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* @param {Function} successCallback
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* triggered when the l10n resource has been successully parsed.
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*
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* @param {Function} failureCallback
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* triggered when the an error has occured.
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*
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* @return {void}
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* uses the following global variables: gL10nData, gTextData, gTextProp.
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*/
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function parseResource(href, lang, successCallback, failureCallback) {
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var baseURL = href.replace(/[^\/]*$/, '') || './';
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// handle escaped characters (backslashes) in a string
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function evalString(text) {
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if (text.lastIndexOf('\\') < 0)
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return text;
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return text.replace(/\\\\/g, '\\')
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.replace(/\\n/g, '\n')
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.replace(/\\r/g, '\r')
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.replace(/\\t/g, '\t')
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.replace(/\\b/g, '\b')
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.replace(/\\f/g, '\f')
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.replace(/\\{/g, '{')
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.replace(/\\}/g, '}')
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.replace(/\\"/g, '"')
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.replace(/\\'/g, "'");
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}
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// parse *.properties text data into an l10n dictionary
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function parseProperties(text) {
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var dictionary = [];
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// token expressions
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var reBlank = /^\s*|\s*$/;
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var reComment = /^\s*#|^\s*$/;
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var reSection = /^\s*\[(.*)\]\s*$/;
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var reImport = /^\s*@import\s+url\((.*)\)\s*$/i;
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var reSplit = /^([^=\s]*)\s*=\s*(.+)$/; // TODO: escape EOLs with '\'
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// parse the *.properties file into an associative array
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function parseRawLines(rawText, extendedSyntax) {
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var entries = rawText.replace(reBlank, '').split(/[\r\n]+/);
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var currentLang = '*';
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var genericLang = lang.replace(/-[a-z]+$/i, '');
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var skipLang = false;
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var match = '';
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for (var i = 0; i < entries.length; i++) {
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var line = entries[i];
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// comment or blank line?
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if (reComment.test(line))
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continue;
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// the extended syntax supports [lang] sections and @import rules
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if (extendedSyntax) {
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if (reSection.test(line)) { // section start?
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match = reSection.exec(line);
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currentLang = match[1];
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skipLang = (currentLang !== '*') &&
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(currentLang !== lang) && (currentLang !== genericLang);
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continue;
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} else if (skipLang) {
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continue;
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}
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if (reImport.test(line)) { // @import rule?
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match = reImport.exec(line);
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loadImport(baseURL + match[1]); // load the resource synchronously
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}
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}
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// key-value pair
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var tmp = line.match(reSplit);
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if (tmp && tmp.length == 3) {
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dictionary[tmp[1]] = evalString(tmp[2]);
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}
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}
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}
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// import another *.properties file
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function loadImport(url) {
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xhrLoadText(url, function(content) {
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parseRawLines(content, false); // don't allow recursive imports
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}, null, false); // load synchronously
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}
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// fill the dictionary
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parseRawLines(text, true);
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return dictionary;
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}
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// load and parse l10n data (warning: global variables are used here)
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xhrLoadText(href, function(response) {
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gTextData += response; // mostly for debug
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// parse *.properties text data into an l10n dictionary
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var data = parseProperties(response);
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// find attribute descriptions, if any
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for (var key in data) {
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var id, prop, index = key.lastIndexOf('.');
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if (index > 0) { // an attribute has been specified
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id = key.substring(0, index);
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prop = key.substr(index + 1);
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} else { // no attribute: assuming text content by default
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id = key;
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prop = gTextProp;
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}
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if (!gL10nData[id]) {
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gL10nData[id] = {};
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}
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gL10nData[id][prop] = data[key];
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}
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// trigger callback
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if (successCallback) {
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successCallback();
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}
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}, failureCallback, gAsyncResourceLoading);
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};
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// load and parse all resources for the specified locale
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function loadLocale(lang, callback) {
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callback = callback || function _callback() {};
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clear();
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gLanguage = lang;
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// check all <link type="application/l10n" href="..." /> nodes
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// and load the resource files
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var langLinks = getL10nResourceLinks();
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var langCount = langLinks.length;
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if (langCount == 0) {
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// we might have a pre-compiled dictionary instead
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var dict = getL10nDictionary();
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if (dict && dict.locales && dict.default_locale) {
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consoleLog('using the embedded JSON directory, early way out');
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gL10nData = dict.locales[lang] || dict.locales[dict.default_locale];
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callback();
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} else {
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consoleLog('no resource to load, early way out');
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}
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// early way out
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fireL10nReadyEvent(lang);
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gReadyState = 'complete';
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return;
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}
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// start the callback when all resources are loaded
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var onResourceLoaded = null;
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var gResourceCount = 0;
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onResourceLoaded = function() {
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gResourceCount++;
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if (gResourceCount >= langCount) {
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callback();
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fireL10nReadyEvent(lang);
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gReadyState = 'complete';
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}
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};
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// load all resource files
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function l10nResourceLink(link) {
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var href = link.href;
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var type = link.type;
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this.load = function(lang, callback) {
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var applied = lang;
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parseResource(href, lang, callback, function() {
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consoleWarn(href + ' not found.');
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applied = '';
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});
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return applied; // return lang if found, an empty string if not found
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};
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}
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for (var i = 0; i < langCount; i++) {
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var resource = new l10nResourceLink(langLinks[i]);
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var rv = resource.load(lang, onResourceLoaded);
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if (rv != lang) { // lang not found, used default resource instead
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consoleWarn('"' + lang + '" resource not found');
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gLanguage = '';
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}
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}
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}
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// clear all l10n data
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function clear() {
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gL10nData = {};
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gTextData = '';
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gLanguage = '';
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// TODO: clear all non predefined macros.
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// There's no such macro /yet/ but we're planning to have some...
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}
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/**
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* Get rules for plural forms (shared with JetPack), see:
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* http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
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* https://github.com/mozilla/addon-sdk/blob/master/python-lib/plural-rules-generator.p
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*
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* @param {string} lang
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* locale (language) used.
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*
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* @return {Function}
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* returns a function that gives the plural form name for a given integer:
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* var fun = getPluralRules('en');
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* fun(1) -> 'one'
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* fun(0) -> 'other'
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* fun(1000) -> 'other'.
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*/
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function getPluralRules(lang) {
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var locales2rules = {
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'af': 3,
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'ak': 4,
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'am': 4,
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'ar': 1,
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'asa': 3,
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'az': 0,
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'be': 11,
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'bem': 3,
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'bez': 3,
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'bg': 3,
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'bh': 4,
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'bm': 0,
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'bn': 3,
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'bo': 0,
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'br': 20,
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'brx': 3,
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'bs': 11,
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'ca': 3,
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'cgg': 3,
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'chr': 3,
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'cs': 12,
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'cy': 17,
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'da': 3,
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'de': 3,
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'dv': 3,
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'dz': 0,
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'ee': 3,
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'el': 3,
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'en': 3,
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'eo': 3,
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'es': 3,
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'et': 3,
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'eu': 3,
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'fa': 0,
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'ff': 5,
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'fi': 3,
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'fil': 4,
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'fo': 3,
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'fr': 5,
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'fur': 3,
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'fy': 3,
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'ga': 8,
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'gd': 24,
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'gl': 3,
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'gsw': 3,
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'gu': 3,
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'guw': 4,
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'gv': 23,
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'ha': 3,
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'haw': 3,
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'he': 2,
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'hi': 4,
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'hr': 11,
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'hu': 0,
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'id': 0,
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'ig': 0,
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'ii': 0,
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'is': 3,
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'it': 3,
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'iu': 7,
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'ja': 0,
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'jmc': 3,
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'jv': 0,
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'ka': 0,
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'kab': 5,
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'kaj': 3,
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'kcg': 3,
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'kde': 0,
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'kea': 0,
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'kk': 3,
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'kl': 3,
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'km': 0,
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'kn': 0,
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'ko': 0,
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'ksb': 3,
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'ksh': 21,
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'ku': 3,
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'kw': 7,
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'lag': 18,
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'lb': 3,
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'lg': 3,
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'ln': 4,
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'lo': 0,
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'lt': 10,
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'lv': 6,
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'mas': 3,
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'mg': 4,
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'mk': 16,
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'ml': 3,
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'mn': 3,
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'mo': 9,
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'mr': 3,
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'ms': 0,
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'mt': 15,
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'my': 0,
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'nah': 3,
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'naq': 7,
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'nb': 3,
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'nd': 3,
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'ne': 3,
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'nl': 3,
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'nn': 3,
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'no': 3,
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'nr': 3,
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'nso': 4,
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'ny': 3,
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'nyn': 3,
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'om': 3,
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'or': 3,
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'pa': 3,
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'pap': 3,
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'pl': 13,
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'ps': 3,
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'pt': 3,
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'rm': 3,
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'ro': 9,
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'rof': 3,
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'ru': 11,
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'rwk': 3,
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'sah': 0,
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'saq': 3,
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'se': 7,
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'seh': 3,
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'ses': 0,
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'sg': 0,
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'sh': 11,
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'shi': 19,
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'sk': 12,
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'sl': 14,
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'sma': 7,
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'smi': 7,
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'smj': 7,
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'smn': 7,
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'sms': 7,
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'sn': 3,
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'so': 3,
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'sq': 3,
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'sr': 11,
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'ss': 3,
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'ssy': 3,
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'st': 3,
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'sv': 3,
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'sw': 3,
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'syr': 3,
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'ta': 3,
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'te': 3,
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'teo': 3,
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'th': 0,
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'ti': 4,
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'tig': 3,
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'tk': 3,
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'tl': 4,
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'tn': 3,
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'to': 0,
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'tr': 0,
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'ts': 3,
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'tzm': 22,
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'uk': 11,
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'ur': 3,
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've': 3,
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'vi': 0,
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'vun': 3,
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'wa': 4,
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'wae': 3,
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'wo': 0,
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'xh': 3,
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'xog': 3,
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'yo': 0,
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'zh': 0,
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'zu': 3
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};
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// utility functions for plural rules methods
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function isIn(n, list) {
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return list.indexOf(n) !== -1;
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}
|
|
function isBetween(n, start, end) {
|
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return start <= n && n <= end;
|
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}
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|
|
// list of all plural rules methods:
|
|
// map an integer to the plural form name to use
|
|
var pluralRules = {
|
|
'0': function(n) {
|
|
return 'other';
|
|
},
|
|
'1': function(n) {
|
|
if ((isBetween((n % 100), 3, 10)))
|
|
return 'few';
|
|
if (n === 0)
|
|
return 'zero';
|
|
if ((isBetween((n % 100), 11, 99)))
|
|
return 'many';
|
|
if (n == 2)
|
|
return 'two';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'2': function(n) {
|
|
if (n !== 0 && (n % 10) === 0)
|
|
return 'many';
|
|
if (n == 2)
|
|
return 'two';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'3': function(n) {
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'4': function(n) {
|
|
if ((isBetween(n, 0, 1)))
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'5': function(n) {
|
|
if ((isBetween(n, 0, 2)) && n != 2)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'6': function(n) {
|
|
if (n === 0)
|
|
return 'zero';
|
|
if ((n % 10) == 1 && (n % 100) != 11)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'7': function(n) {
|
|
if (n == 2)
|
|
return 'two';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'8': function(n) {
|
|
if ((isBetween(n, 3, 6)))
|
|
return 'few';
|
|
if ((isBetween(n, 7, 10)))
|
|
return 'many';
|
|
if (n == 2)
|
|
return 'two';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'9': function(n) {
|
|
if (n === 0 || n != 1 && (isBetween((n % 100), 1, 19)))
|
|
return 'few';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'10': function(n) {
|
|
if ((isBetween((n % 10), 2, 9)) && !(isBetween((n % 100), 11, 19)))
|
|
return 'few';
|
|
if ((n % 10) == 1 && !(isBetween((n % 100), 11, 19)))
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'11': function(n) {
|
|
if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))
|
|
return 'few';
|
|
if ((n % 10) === 0 ||
|
|
(isBetween((n % 10), 5, 9)) ||
|
|
(isBetween((n % 100), 11, 14)))
|
|
return 'many';
|
|
if ((n % 10) == 1 && (n % 100) != 11)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'12': function(n) {
|
|
if ((isBetween(n, 2, 4)))
|
|
return 'few';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'13': function(n) {
|
|
if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))
|
|
return 'few';
|
|
if (n != 1 && (isBetween((n % 10), 0, 1)) ||
|
|
(isBetween((n % 10), 5, 9)) ||
|
|
(isBetween((n % 100), 12, 14)))
|
|
return 'many';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'14': function(n) {
|
|
if ((isBetween((n % 100), 3, 4)))
|
|
return 'few';
|
|
if ((n % 100) == 2)
|
|
return 'two';
|
|
if ((n % 100) == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'15': function(n) {
|
|
if (n === 0 || (isBetween((n % 100), 2, 10)))
|
|
return 'few';
|
|
if ((isBetween((n % 100), 11, 19)))
|
|
return 'many';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'16': function(n) {
|
|
if ((n % 10) == 1 && n != 11)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'17': function(n) {
|
|
if (n == 3)
|
|
return 'few';
|
|
if (n === 0)
|
|
return 'zero';
|
|
if (n == 6)
|
|
return 'many';
|
|
if (n == 2)
|
|
return 'two';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'18': function(n) {
|
|
if (n === 0)
|
|
return 'zero';
|
|
if ((isBetween(n, 0, 2)) && n !== 0 && n != 2)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'19': function(n) {
|
|
if ((isBetween(n, 2, 10)))
|
|
return 'few';
|
|
if ((isBetween(n, 0, 1)))
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'20': function(n) {
|
|
if ((isBetween((n % 10), 3, 4) || ((n % 10) == 9)) && !(
|
|
isBetween((n % 100), 10, 19) ||
|
|
isBetween((n % 100), 70, 79) ||
|
|
isBetween((n % 100), 90, 99)
|
|
))
|
|
return 'few';
|
|
if ((n % 1000000) === 0 && n !== 0)
|
|
return 'many';
|
|
if ((n % 10) == 2 && !isIn((n % 100), [12, 72, 92]))
|
|
return 'two';
|
|
if ((n % 10) == 1 && !isIn((n % 100), [11, 71, 91]))
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'21': function(n) {
|
|
if (n === 0)
|
|
return 'zero';
|
|
if (n == 1)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'22': function(n) {
|
|
if ((isBetween(n, 0, 1)) || (isBetween(n, 11, 99)))
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'23': function(n) {
|
|
if ((isBetween((n % 10), 1, 2)) || (n % 20) === 0)
|
|
return 'one';
|
|
return 'other';
|
|
},
|
|
'24': function(n) {
|
|
if ((isBetween(n, 3, 10) || isBetween(n, 13, 19)))
|
|
return 'few';
|
|
if (isIn(n, [2, 12]))
|
|
return 'two';
|
|
if (isIn(n, [1, 11]))
|
|
return 'one';
|
|
return 'other';
|
|
}
|
|
};
|
|
|
|
// return a function that gives the plural form name for a given integer
|
|
var index = locales2rules[lang.replace(/-.*$/, '')];
|
|
if (!(index in pluralRules)) {
|
|
consoleWarn('plural form unknown for [' + lang + ']');
|
|
return function() { return 'other'; };
|
|
}
|
|
return pluralRules[index];
|
|
}
|
|
|
|
// pre-defined 'plural' macro
|
|
gMacros.plural = function(str, param, key, prop) {
|
|
var n = parseFloat(param);
|
|
if (isNaN(n))
|
|
return str;
|
|
|
|
// TODO: support other properties (l20n still doesn't...)
|
|
if (prop != gTextProp)
|
|
return str;
|
|
|
|
// initialize _pluralRules
|
|
if (!gMacros._pluralRules) {
|
|
gMacros._pluralRules = getPluralRules(gLanguage);
|
|
}
|
|
var index = '[' + gMacros._pluralRules(n) + ']';
|
|
|
|
// try to find a [zero|one|two] key if it's defined
|
|
if (n === 0 && (key + '[zero]') in gL10nData) {
|
|
str = gL10nData[key + '[zero]'][prop];
|
|
} else if (n == 1 && (key + '[one]') in gL10nData) {
|
|
str = gL10nData[key + '[one]'][prop];
|
|
} else if (n == 2 && (key + '[two]') in gL10nData) {
|
|
str = gL10nData[key + '[two]'][prop];
|
|
} else if ((key + index) in gL10nData) {
|
|
str = gL10nData[key + index][prop];
|
|
} else if ((key + '[other]') in gL10nData) {
|
|
str = gL10nData[key + '[other]'][prop];
|
|
}
|
|
|
|
return str;
|
|
};
|
|
|
|
|
|
/**
|
|
* l10n dictionary functions
|
|
*/
|
|
|
|
// fetch an l10n object, warn if not found, apply `args' if possible
|
|
function getL10nData(key, args) {
|
|
var data = gL10nData[key];
|
|
if (!data) {
|
|
consoleWarn('#' + key + ' missing for [' + gLanguage + ']');
|
|
}
|
|
|
|
/** This is where l10n expressions should be processed.
|
|
* The plan is to support C-style expressions from the l20n project;
|
|
* until then, only two kinds of simple expressions are supported:
|
|
* {[ index ]} and {{ arguments }}.
|
|
*/
|
|
var rv = {};
|
|
for (var prop in data) {
|
|
var str = data[prop];
|
|
str = substIndexes(str, args, key, prop);
|
|
str = substArguments(str, args);
|
|
rv[prop] = str;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
// replace {[macros]} with their values
|
|
function substIndexes(str, args, key, prop) {
|
|
var reIndex = /\{\[\s*([a-zA-Z]+)\(([a-zA-Z]+)\)\s*\]\}/;
|
|
var reMatch = reIndex.exec(str);
|
|
if (!reMatch || !reMatch.length)
|
|
return str;
|
|
|
|
// an index/macro has been found
|
|
// Note: at the moment, only one parameter is supported
|
|
var macroName = reMatch[1];
|
|
var paramName = reMatch[2];
|
|
var param;
|
|
if (args && paramName in args) {
|
|
param = args[paramName];
|
|
} else if (paramName in gL10nData) {
|
|
param = gL10nData[paramName];
|
|
}
|
|
|
|
// there's no macro parser yet: it has to be defined in gMacros
|
|
if (macroName in gMacros) {
|
|
var macro = gMacros[macroName];
|
|
str = macro(str, param, key, prop);
|
|
}
|
|
return str;
|
|
}
|
|
|
|
// replace {{arguments}} with their values
|
|
function substArguments(str, args) {
|
|
var reArgs = /\{\{\s*([a-zA-Z\.]+)\s*\}\}/;
|
|
var match = reArgs.exec(str);
|
|
while (match) {
|
|
if (!match || match.length < 2)
|
|
return str; // argument key not found
|
|
|
|
var arg = match[1];
|
|
var sub = '';
|
|
if (arg in args) {
|
|
sub = args[arg];
|
|
} else if (arg in gL10nData) {
|
|
sub = gL10nData[arg][gTextProp];
|
|
} else {
|
|
consoleWarn('could not find argument {{' + arg + '}}');
|
|
return str;
|
|
}
|
|
|
|
str = str.substring(0, match.index) + sub +
|
|
str.substr(match.index + match[0].length);
|
|
match = reArgs.exec(str);
|
|
}
|
|
return str;
|
|
}
|
|
|
|
// translate an HTML element
|
|
function translateElement(element) {
|
|
var l10n = getL10nAttributes(element);
|
|
if (!l10n.id)
|
|
return;
|
|
|
|
// get the related l10n object
|
|
var data = getL10nData(l10n.id, l10n.args);
|
|
if (!data) {
|
|
consoleWarn('#' + l10n.id + ' missing for [' + gLanguage + ']');
|
|
return;
|
|
}
|
|
|
|
// translate element (TODO: security checks?)
|
|
// for the node content, replace the content of the first child textNode
|
|
// and clear other child textNodes
|
|
if (data[gTextProp]) { // XXX
|
|
if (getChildElementCount(element) === 0) {
|
|
element[gTextProp] = data[gTextProp];
|
|
} else {
|
|
var children = element.childNodes,
|
|
found = false;
|
|
for (var i = 0, l = children.length; i < l; i++) {
|
|
if (children[i].nodeType === 3 &&
|
|
/\S/.test(children[i].textContent)) { // XXX
|
|
// using nodeValue seems cross-browser
|
|
if (found) {
|
|
children[i].nodeValue = '';
|
|
} else {
|
|
children[i].nodeValue = data[gTextProp];
|
|
found = true;
|
|
}
|
|
}
|
|
}
|
|
if (!found) {
|
|
consoleWarn('unexpected error, could not translate element content');
|
|
}
|
|
}
|
|
delete data[gTextProp];
|
|
}
|
|
|
|
for (var k in data) {
|
|
element[k] = data[k];
|
|
}
|
|
}
|
|
|
|
// webkit browsers don't currently support 'children' on SVG elements...
|
|
function getChildElementCount(element) {
|
|
if (element.children) {
|
|
return element.children.length;
|
|
}
|
|
if (typeof element.childElementCount !== 'undefined') {
|
|
return element.childElementCount;
|
|
}
|
|
var count = 0;
|
|
for (var i = 0; i < element.childNodes.length; i++) {
|
|
count += element.nodeType === 1 ? 1 : 0;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
// translate an HTML subtree
|
|
function translateFragment(element) {
|
|
element = element || document.documentElement;
|
|
|
|
// check all translatable children (= w/ a `data-l10n-id' attribute)
|
|
var children = getTranslatableChildren(element);
|
|
var elementCount = children.length;
|
|
for (var i = 0; i < elementCount; i++) {
|
|
translateElement(children[i]);
|
|
}
|
|
|
|
// translate element itself if necessary
|
|
translateElement(element);
|
|
}
|
|
|
|
// Startup & Public API
|
|
|
|
function l10nStartup() {
|
|
gReadyState = 'interactive';
|
|
consoleLog('loading [' + navigator.language + '] resources, ' +
|
|
(gAsyncResourceLoading ? 'asynchronously.' : 'synchronously.'));
|
|
|
|
// load the default locale and translate the document if required
|
|
if (document.documentElement.lang === navigator.language) {
|
|
loadLocale(navigator.language);
|
|
} else {
|
|
loadLocale(navigator.language, translateFragment);
|
|
}
|
|
}
|
|
|
|
// public API
|
|
var l10n = {
|
|
start: function() {
|
|
if (document.readyState === 'complete' ||
|
|
document.readyState === 'interactive') {
|
|
window.setTimeout(l10nStartup);
|
|
} else {
|
|
document.addEventListener('DOMContentLoaded', l10nStartup);
|
|
}
|
|
},
|
|
|
|
// get a localized string
|
|
get: function l10n_get(key, args, fallback) {
|
|
var data = getL10nData(key, args) || fallback;
|
|
if (data) {
|
|
return 'textContent' in data ? data.textContent : '';
|
|
}
|
|
return '{{' + key + '}}';
|
|
},
|
|
|
|
// get|set the document language and direction
|
|
get language() {
|
|
return {
|
|
// get|set the document language (ISO-639-1)
|
|
get code() { return gLanguage; },
|
|
set code(lang) { loadLocale(lang, translateFragment); },
|
|
|
|
// get the direction (ltr|rtl) of the current language
|
|
get direction() {
|
|
// http://www.w3.org/International/questions/qa-scripts
|
|
// Arabic, Hebrew, Farsi, Pashto, Urdu
|
|
var rtlList = ['ar', 'he', 'fa', 'ps', 'ur'];
|
|
return (rtlList.indexOf(gLanguage) >= 0) ? 'rtl' : 'ltr';
|
|
}
|
|
};
|
|
},
|
|
|
|
// translate an element or document fragment
|
|
translate: translateFragment,
|
|
|
|
// get (a clone of) the dictionary for the current locale
|
|
get dictionary() { return JSON.parse(JSON.stringify(gL10nData)); },
|
|
|
|
// this can be used to prevent race conditions
|
|
get readyState() { return gReadyState; },
|
|
ready: function l10n_ready(callback) {
|
|
if (!callback)
|
|
return;
|
|
|
|
if (gReadyState == 'complete') {
|
|
window.setTimeout(callback);
|
|
} else {
|
|
window.addEventListener('localized', callback);
|
|
}
|
|
}
|
|
};
|
|
|
|
return l10n;
|
|
});
|