mirror of
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238 lines
7.4 KiB
Text
238 lines
7.4 KiB
Text
/**
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* Copyright (c) 2014 Vincent Petry <pvince81@owncloud.com>
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*
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* This file is licensed under the Affero General Public License version 3
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* or later.
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*
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* See the COPYING-README file.
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*
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*/
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/**
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* L10N namespace with localization functions.
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*
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* @namespace
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*/
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OC.L10N = {
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/**
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* String bundles with app name as key.
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* @type {Object.<String,String>}
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*/
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_bundles: {},
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/**
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* Plural functions, key is app name and value is function.
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* @type {Object.<String,Function>}
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*/
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_pluralFunctions: {},
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/**
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* Load an app's translation bundle if not loaded already.
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*
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* @param {String} appName name of the app
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* @param {Function} callback callback to be called when
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* the translations are loaded
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* @return {Promise} promise
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*/
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load: function(appName, callback) {
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// already available ?
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if (this._bundles[appName] || OC.getLocale() === 'en') {
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var deferred = $.Deferred();
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var promise = deferred.promise();
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promise.then(callback);
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deferred.resolve();
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return promise;
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}
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var self = this;
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var url = OC.filePath(appName, 'l10n', OC.getLocale() + '.json');
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// load JSON translation bundle per AJAX
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return $.get(url)
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.then(
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function(result) {
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if (result.translations) {
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self.register(appName, result.translations, result.pluralForm);
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}
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})
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.then(callback);
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},
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/**
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* Register an app's translation bundle.
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*
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* @param {String} appName name of the app
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* @param {Object<String,String>} bundle
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* @param {Function|String} [pluralForm] optional plural function or plural string
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*/
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register: function(appName, bundle, pluralForm) {
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var self = this;
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if (_.isUndefined(this._bundles[appName])) {
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this._bundles[appName] = bundle || {};
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if (_.isFunction(pluralForm)) {
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this._pluralFunctions[appName] = pluralForm;
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} else {
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// generate plural function based on form
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this._pluralFunctions[appName] = this._generatePluralFunction(pluralForm);
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}
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} else {
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// Theme overwriting the default language
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_.extend(self._bundles[appName], bundle);
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}
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},
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/**
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* Generates a plural function based on the given plural form.
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* If an invalid form has been given, returns a default function.
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*
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* @param {String} pluralForm plural form
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*/
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_generatePluralFunction: function(pluralForm) {
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// default func
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var func = function (n) {
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var p = (n !== 1) ? 1 : 0;
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return { 'nplural' : 2, 'plural' : p };
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};
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if (!pluralForm) {
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console.warn('Missing plural form in language file');
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return func;
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}
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/**
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* code below has been taken from jsgettext - which is LGPL licensed
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* https://developer.berlios.de/projects/jsgettext/
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* http://cvs.berlios.de/cgi-bin/viewcvs.cgi/jsgettext/jsgettext/lib/Gettext.js
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*/
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var pf_re = new RegExp('^(\\s*nplurals\\s*=\\s*[0-9]+\\s*;\\s*plural\\s*=\\s*(?:\\s|[-\\?\\|&=!<>+*/%:;a-zA-Z0-9_\\(\\)])+)', 'm');
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if (pf_re.test(pluralForm)) {
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//ex english: "Plural-Forms: nplurals=2; plural=(n != 1);\n"
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//pf = "nplurals=2; plural=(n != 1);";
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//ex russian: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10< =4 && (n%100<10 or n%100>=20) ? 1 : 2)
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//pf = "nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2)";
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var pf = pluralForm;
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if (! /;\s*$/.test(pf)) {
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pf = pf.concat(';');
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}
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/* We used to use eval, but it seems IE has issues with it.
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* We now use "new Function", though it carries a slightly
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* bigger performance hit.
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var code = 'function (n) { var plural; var nplurals; '+pf+' return { "nplural" : nplurals, "plural" : (plural === true ? 1 : plural ? plural : 0) }; };';
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Gettext._locale_data[domain].head.plural_func = eval("("+code+")");
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*/
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var code = 'var plural; var nplurals; '+pf+' return { "nplural" : nplurals, "plural" : (plural === true ? 1 : plural ? plural : 0) };';
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func = new Function("n", code);
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} else {
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console.warn('Invalid plural form in language file: "' + pluralForm + '"');
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}
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return func;
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},
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/**
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* Translate a string
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* @param {string} app the id of the app for which to translate the string
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* @param {string} text the string to translate
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* @param [vars] map of placeholder key to value
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* @param {number} [count] number to replace %n with
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* @param {array} [options] options array
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* @param {bool} [options.escape=true] enable/disable auto escape of placeholders (by default enabled)
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* @return {string}
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*/
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translate: function(app, text, vars, count, options) {
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var defaultOptions = {
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escape: true
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},
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allOptions = options || {};
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_.defaults(allOptions, defaultOptions);
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// TODO: cache this function to avoid inline recreation
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// of the same function over and over again in case
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// translate() is used in a loop
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var _build = function (text, vars, count) {
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return text.replace(/%n/g, count).replace(/{([^{}]*)}/g,
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function (a, b) {
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var r = vars[b];
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if(typeof r === 'string' || typeof r === 'number') {
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if(allOptions.escape) {
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return escapeHTML(r);
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} else {
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return r;
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}
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} else {
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return a;
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}
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}
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);
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};
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var translation = text;
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var bundle = this._bundles[app] || {};
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var value = bundle[text];
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if( typeof(value) !== 'undefined' ){
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translation = value;
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}
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if(typeof vars === 'object' || count !== undefined ) {
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return _build(translation, vars, count);
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} else {
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return translation;
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}
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},
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/**
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* Translate a plural string
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* @param {string} app the id of the app for which to translate the string
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* @param {string} textSingular the string to translate for exactly one object
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* @param {string} textPlural the string to translate for n objects
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* @param {number} count number to determine whether to use singular or plural
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* @param [vars] map of placeholder key to value
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* @param {array} [options] options array
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* @param {bool} [options.escape=true] enable/disable auto escape of placeholders (by default enabled)
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* @return {string} Translated string
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*/
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translatePlural: function(app, textSingular, textPlural, count, vars, options) {
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var identifier = '_' + textSingular + '_::_' + textPlural + '_';
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var bundle = this._bundles[app] || {};
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var value = bundle[identifier];
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if( typeof(value) !== 'undefined' ){
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var translation = value;
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if ($.isArray(translation)) {
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var plural = this._pluralFunctions[app](count);
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return this.translate(app, translation[plural.plural], vars, count, options);
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}
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}
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if(count === 1) {
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return this.translate(app, textSingular, vars, count, options);
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}
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else{
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return this.translate(app, textPlural, vars, count, options);
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}
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}
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};
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/**
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* translate a string
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* @param {string} app the id of the app for which to translate the string
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* @param {string} text the string to translate
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* @param [vars] map of placeholder key to value
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* @param {number} [count] number to replace %n with
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* @return {string}
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*/
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window.t = _.bind(OC.L10N.translate, OC.L10N);
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/**
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* translate a string
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* @param {string} app the id of the app for which to translate the string
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* @param {string} text_singular the string to translate for exactly one object
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* @param {string} text_plural the string to translate for n objects
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* @param {number} count number to determine whether to use singular or plural
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* @param [vars] map of placeholder key to value
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* @return {string} Translated string
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*/
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window.n = _.bind(OC.L10N.translatePlural, OC.L10N);
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Handlebars.registerHelper('t', function(app, text) {
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return OC.L10N.translate(app, text);
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});
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