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| -rw-r--r-- | src/i18n.tsx | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/src/i18n.tsx b/src/i18n.tsx new file mode 100644 index 000000000..ca57a6ad7 --- /dev/null +++ b/src/i18n.tsx @@ -0,0 +1,273 @@ +/* + 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>; + } +} + |