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-rw-r--r--src/i18n.tsx273
1 files changed, 273 insertions, 0 deletions
diff --git a/src/i18n.tsx b/src/i18n.tsx
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+++ b/src/i18n.tsx
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+/*
+ This file is part of TALER
+ (C) 2016 GNUnet e.V.
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
+ */
+
+"use strict";
+
+document.addEventListener(
+ "DOMContentLoaded",
+ function () {
+ try {
+ document.body.lang = chrome.i18n.getUILanguage();
+ } catch (e) {
+ // chrome.* not available?
+ }
+ });
+
+declare var i18n: any;
+
+/**
+ * Information about the last two i18n results, used by plural()
+ * 2-element array, each element contains { stringFound: boolean, pluralValue: number }
+ */
+var i18nResult = [] as any;
+
+const JedModule: any = (window as any)["Jed"];
+var jed: any;
+
+
+class PluralNumber {
+ n: number;
+
+ constructor(n: number) {
+ this.n = n;
+ }
+
+ valueOf () {
+ return this.n;
+ }
+
+ toString () {
+ return this.n.toString();
+ }
+}
+
+
+/**
+ * Initialize Jed
+ */
+function init () {
+ if ("object" === typeof jed) {
+ return;
+ }
+ if ("function" !== typeof JedModule) {
+ return;
+ }
+ if (!(i18n.lang in i18n.strings)) {
+ i18n.lang = "en-US";
+ return;
+ }
+ jed = new JedModule(i18n.strings[i18n.lang]);
+}
+
+
+/**
+ * Convert template strings to a msgid
+ */
+function toI18nString(strings: string[]) {
+ let str = "";
+ for (let i = 0; i < strings.length; i++) {
+ str += strings[i];
+ if (i < strings.length - 1) {
+ str += "%"+ (i+1) +"$s";
+ }
+ }
+ return str;
+}
+
+
+/**
+ * Use the first number in values to determine plural form
+ */
+function getPluralValue (values: any) {
+ let n = null;
+ for (let i = 0; i < values.length; i++) {
+ if ("number" === typeof values[i] || values[i] instanceof PluralNumber) {
+ if (null === n || values[i] instanceof PluralNumber) {
+ n = values[i].valueOf();
+ }
+ }
+ }
+ return (null === n) ? 1 : n;
+}
+
+
+/**
+ * Store information about the result of the last to i18n() or i18n.parts()
+ *
+ * @param i18nString the string template as found in i18n.strings
+ * @param pluralValue value returned by getPluralValue()
+ */
+function setI18nResult (i18nString: string, pluralValue: number) {
+ i18nResult[1] = i18nResult[0];
+ i18nResult[0] = {
+ stringFound: i18nString in i18n.strings[i18n.lang].locale_data[i18n.lang],
+ pluralValue: pluralValue
+ };
+}
+
+
+/**
+ * Internationalize a string template with arbitrary serialized values.
+ */
+var i18n = (function i18n(strings: string[], ...values: any[]) {
+ init();
+ //console.log('i18n:', strings, values);
+ if ("object" !== typeof jed) {
+ // Fallback implementation in case i18n lib is not there
+ return String.raw(strings as any, ...values);
+ }
+
+ let str = toI18nString (strings);
+ let n = getPluralValue (values);
+ let tr = jed.translate(str).ifPlural(n, str).fetch(...values);
+
+ setI18nResult (str, n);
+ return tr;
+}) as any;
+
+try {
+ i18n.lang = chrome.i18n.getUILanguage();
+} catch (e) {
+ console.warn("i18n default language not available");
+}
+i18n.strings = {};
+
+
+/**
+ * Interpolate i18nized values with arbitrary objects.
+ * @return Array of strings/objects.
+ */
+i18n.parts = function(strings: string[], ...values: any[]) {
+ init();
+ if ("object" !== typeof jed) {
+ // Fallback implementation in case i18n lib is not there
+ let parts: string[] = [];
+
+ for (let i = 0; i < strings.length; i++) {
+ parts.push(strings[i]);
+ if (i < values.length) {
+ parts.push(values[i]);
+ }
+ }
+ return parts;
+ }
+
+ let str = toI18nString(strings);
+ let n = getPluralValue(values);
+ let tr = jed.ngettext(str, str, n).split(/%(\d+)\$s/);
+ let parts: string[] = [];
+ for (let i = 0; i < tr.length; i++) {
+ if (0 == i % 2) {
+ parts.push(tr[i]);
+ } else {
+ parts.push(values[parseInt(tr[i]) - 1]);
+ }
+ }
+
+ setI18nResult(str, n);
+ return parts;
+};
+
+
+/**
+ * Pluralize based on first numeric parameter in the template.
+ * @todo The plural argument is used for extraction by pogen.js
+ */
+i18n.plural = function (singular: any, plural: any) {
+ if (i18nResult[1].stringFound) { // string found in translation file?
+ // 'singular' has the correctly translated & pluralized text
+ return singular;
+ } else {
+ // return appropriate form based on value found in 'singular'
+ return (1 == i18nResult[1].pluralValue) ? singular : plural;
+ }
+};
+
+interface TranslateSwitchProps {
+ target: number;
+}
+
+/**
+ * Return a number that is used to determine the plural form for a template.
+ */
+i18n.number = function (n : number) {
+ return new PluralNumber (n);
+};
+
+i18n.Translate = class extends React.Component<void,void> {
+ render(): JSX.Element {
+ return <div>{this.props.children}</div>;
+ }
+}
+
+i18n.TranslateSwitch = class extends React.Component<TranslateSwitchProps,void>{
+ render(): JSX.Element {
+ let singular;
+ let plural;
+ let children = this.props.children;
+ if (children) {
+ React.Children.forEach(children, (child: any) => {
+ if (child.type == i18n.TranslatePlural) {
+ plural = child;
+ }
+ if (child.type == i18n.TranslateSingular) {
+ singular = child;
+ }
+ });
+ }
+ if ((!singular) || (!plural)) {
+ console.error("translation not found");
+ return React.createElement("span", {}, ["translation not found"]);
+ }
+ if ("object" !== typeof jed) {
+ if (this.props.target == 1) {
+ return singular;
+ } else {
+ return plural;
+ }
+ } else {
+ let tr = jed.ngettext(str, str, n).split(/%(\d+)\$s/);
+ let parts: any[] = [];
+ if (this.props.target == 1) {
+ singular.props = null;
+ return singular
+ } else {
+ let parts: any[] = [];
+ return parts;
+ }
+ }
+ }
+}
+
+interface TranslationProps {
+ /**
+ * Substitutions to do for the translation.
+ */
+ subst: {[n: number]: any};
+}
+
+i18n.TranslatePlural = class extends React.Component<TranslationProps,void>{
+ render(): JSX.Element {
+ return <div>{this.props.children}</div>;
+ }
+}
+
+i18n.TranslateSingular = class extends React.Component<TranslationProps,void>{
+ render(): JSX.Element {
+ return <div>{this.props.children}</div>;
+ }
+}
+