1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/browser/extensions/pdfjs/content/web/l10n.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,133 @@
1.4 +/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
1.6 +/* globals FirefoxCom */
1.7 +
1.8 +'use strict';
1.9 +
1.10 +// Small subset of the webL10n API by Fabien Cazenave for pdf.js extension.
1.11 +(function(window) {
1.12 + var gLanguage = '';
1.13 +
1.14 + // fetch an l10n objects
1.15 + function getL10nData(key) {
1.16 + var response = FirefoxCom.requestSync('getStrings', key);
1.17 + var data = JSON.parse(response);
1.18 + if (!data) {
1.19 + console.warn('[l10n] #' + key + ' missing for [' + gLanguage + ']');
1.20 + }
1.21 + return data;
1.22 + }
1.23 +
1.24 + // replace {{arguments}} with their values
1.25 + function substArguments(text, args) {
1.26 + if (!args) {
1.27 + return text;
1.28 + }
1.29 + return text.replace(/\{\{\s*(\w+)\s*\}\}/g, function(all, name) {
1.30 + return (name in args ? args[name] : '{{' + name + '}}');
1.31 + });
1.32 + }
1.33 +
1.34 + // translate a string
1.35 + function translateString(key, args, fallback) {
1.36 + var i = key.lastIndexOf('.');
1.37 + var name, property;
1.38 + if (i >= 0) {
1.39 + name = key.substring(0, i);
1.40 + property = key.substring(i + 1);
1.41 + } else {
1.42 + name = key;
1.43 + property = 'textContent';
1.44 + }
1.45 + var data = getL10nData(name);
1.46 + var value = (data && data[property]) || fallback;
1.47 + if (!value) {
1.48 + return '{{' + key + '}}';
1.49 + }
1.50 + return substArguments(value, args);
1.51 + }
1.52 +
1.53 + // translate an HTML element
1.54 + function translateElement(element) {
1.55 + if (!element || !element.dataset) {
1.56 + return;
1.57 + }
1.58 +
1.59 + // get the related l10n object
1.60 + var key = element.dataset.l10nId;
1.61 + var data = getL10nData(key);
1.62 + if (!data) {
1.63 + return;
1.64 + }
1.65 +
1.66 + // get arguments (if any)
1.67 + // TODO: more flexible parser?
1.68 + var args;
1.69 + if (element.dataset.l10nArgs) {
1.70 + try {
1.71 + args = JSON.parse(element.dataset.l10nArgs);
1.72 + } catch (e) {
1.73 + console.warn('[l10n] could not parse arguments for #' + key + '');
1.74 + }
1.75 + }
1.76 +
1.77 + // translate element
1.78 + // TODO: security check?
1.79 + for (var k in data) {
1.80 + element[k] = substArguments(data[k], args);
1.81 + }
1.82 + }
1.83 +
1.84 +
1.85 + // translate an HTML subtree
1.86 + function translateFragment(element) {
1.87 + element = element || document.querySelector('html');
1.88 +
1.89 + // check all translatable children (= w/ a `data-l10n-id' attribute)
1.90 + var children = element.querySelectorAll('*[data-l10n-id]');
1.91 + var elementCount = children.length;
1.92 + for (var i = 0; i < elementCount; i++) {
1.93 + translateElement(children[i]);
1.94 + }
1.95 +
1.96 + // translate element itself if necessary
1.97 + if (element.dataset.l10nId) {
1.98 + translateElement(element);
1.99 + }
1.100 + }
1.101 +
1.102 + window.addEventListener('DOMContentLoaded', function() {
1.103 + gLanguage = FirefoxCom.requestSync('getLocale', null);
1.104 +
1.105 + translateFragment();
1.106 +
1.107 + // fire a 'localized' DOM event
1.108 + var evtObject = document.createEvent('Event');
1.109 + evtObject.initEvent('localized', false, false);
1.110 + evtObject.language = gLanguage;
1.111 + window.dispatchEvent(evtObject);
1.112 + });
1.113 +
1.114 + // Public API
1.115 + document.mozL10n = {
1.116 + // get a localized string
1.117 + get: translateString,
1.118 +
1.119 + // get the document language
1.120 + getLanguage: function() {
1.121 + return gLanguage;
1.122 + },
1.123 +
1.124 + // get the direction (ltr|rtl) of the current language
1.125 + getDirection: function() {
1.126 + // http://www.w3.org/International/questions/qa-scripts
1.127 + // Arabic, Hebrew, Farsi, Pashto, Urdu
1.128 + var rtlList = ['ar', 'he', 'fa', 'ps', 'ur'];
1.129 + return (rtlList.indexOf(gLanguage) >= 0 ? 'rtl' : 'ltr');
1.130 + },
1.131 +
1.132 + // translate an element or document fragment
1.133 + translate: translateFragment
1.134 + };
1.135 +})(this);
1.136 +
