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| -rw-r--r-- | i18n/i18n.ts | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/i18n/i18n.ts b/i18n/i18n.ts new file mode 100644 index 000000000..230bddd7d --- /dev/null +++ b/i18n/i18n.ts @@ -0,0 +1,179 @@ +/* + 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, If not, see <http://www.gnu.org/licenses/> + */ + +"use strict"; + +document.addEventListener( + "DOMContentLoaded", + function () { + document.body.lang = chrome.i18n.getUILanguage(); + }); + +declare var i18n: any; + +const JedModule = window["Jed"]; +var jed; +var i18nDebug = false; + + +class PluralNumber { + n: number; + + constructor(n) { + 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"; + } + jed = new JedModule(i18n.strings[i18n.lang]); + + if (i18nDebug) { + let link = m("a[href=https://demo.taler.net]", i18n`free KUDOS`); + let i = 1, amount = 5, currency = "EUR", date = new Date(), text = "demo.taler.net"; + console.log(i18n`DEBUG: Your balance on ${date} is ${amount} KUDO. Get more at ${text}`); + console.log(i18n.parts`DEBUG: Your balance on ${date} is ${amount} KUDO. Get more at ${link}`); + console.log(i18n.pluralize(i18n`DEBUG: Your balance is ${amount} KUDO.`, + `DEBUG: Your balance is ${amount} KUDOs.`)); + console.log(i18n.pluralize(i18n`DEBUG: #${i}: Your balance is ${i18n.number(amount)} KUDO.`, + `DEBUG: #${i}: Your balance is ${i18n.number(amount)} KUDOs.`)); + } +} + + +/** Convert template strings to a msgid */ +function toI18nString(strings) { + let str = ""; + for (let i = 0; i < strings.length; i++) { + str += strings[i]; + if (i < strings.length - 1) { + str += "%"+ (i+1) +"$s"; + } + } + return str; +} + + +/** Use the first number in values to determine plural form */ +function getPluralValue (values) { + 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; +} + + +var i18n = <any>function i18n(strings, ...values) { + init(); + if ("object" !== typeof jed) { + // Fallback implementation in case i18n lib is not there + return String.raw(strings, ...values); + } + + let str = toI18nString (strings); + let n = getPluralValue (values); + let tr = jed.translate(str).ifPlural(n, str).fetch(...values); + if (i18nDebug) { + console.log('i18n:', 'n: ', n, 'strings:', strings, 'values:', values); + console.log('i18n:', 'str:', str); + console.log('i18n:', 'tr:', tr); + } + return tr; +}; + +i18n.lang = chrome.i18n.getUILanguage(); +i18n.strings = {}; + + +/** + * Interpolate i18nized values with arbitrary objects. + * @return Array of strings/objects. + */ +i18n.parts = function(strings, ...values) { + init(); + if ("object" !== typeof jed) { + // Fallback implementation in case i18n lib is not there + let parts = []; + + 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 = []; + for (let i = 0; i < tr.length; i++) { + if (0 == i % 2) { + parts.push(tr[i]); + } else { + parts.push(values[parseInt(tr[i]) - 1]); + } + } + + if (i18nDebug) { + console.log('i18n.parts:', 'n: ', n, 'strings:', strings, 'values:', values); + console.log('i18n.parts:', 'str:', str); + console.log('i18n.parts:', 'parts:', parts); + } + return parts; +}; + + +/** + * Pluralize based on first numeric parameter in the template. + * @todo The plural argument is used for extraction by pogen.js + */ +i18n.pluralize = function (singular, plural) { + return singular; +}; + + +/** + * Return a number that is used to determine the plural form for a template. + */ +i18n.number = function (n : number) { + return new PluralNumber (n); +} |