react-native-i18n/vendor/i18n.js

868 lines
26 KiB
JavaScript

// I18n.js
// =======
//
// This small library provides the Rails I18n API on the Javascript.
// You don't actually have to use Rails (or even Ruby) to use I18n.js.
// Just make sure you export all translations in an object like this:
//
// I18n.translations.en = {
// hello: "Hello World"
// };
//
// See tests for specific formatting like numbers and dates.
//
;(function(factory) {
if (typeof module !== 'undefined' && module.exports) {
// Node/CommonJS
module.exports = factory(this);
} else if (typeof define === 'function' && define.amd) {
// AMD
var global=this;
define('i18n', function(){ return factory(global);});
} else {
// Browser globals
this.I18n = factory(this);
}
}(function(global) {
"use strict";
// Use previously defined object if exists in current scope
var I18n = global && global.I18n || {};
// Just cache the Array#slice function.
var slice = Array.prototype.slice;
// Apply number padding.
var padding = function(number) {
return ("0" + number.toString()).substr(-2);
};
// Set default days/months translations.
var DATE = {
day_names: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]
, abbr_day_names: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]
, month_names: [null, "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]
, abbr_month_names: [null, "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
, meridian: ["AM", "PM"]
};
// Set default number format.
var NUMBER_FORMAT = {
precision: 3
, separator: "."
, delimiter: ","
, strip_insignificant_zeros: false
};
// Set default currency format.
var CURRENCY_FORMAT = {
unit: "$"
, precision: 2
, format: "%u%n"
, sign_first: true
, delimiter: ","
, separator: "."
};
// Set default percentage format.
var PERCENTAGE_FORMAT = {
unit: "%"
, precision: 3
, format: "%n%u"
, separator: "."
, delimiter: ""
};
// Set default size units.
var SIZE_UNITS = [null, "kb", "mb", "gb", "tb"];
// Other default options
var DEFAULT_OPTIONS = {
// Set default locale. This locale will be used when fallback is enabled and
// the translation doesn't exist in a particular locale.
defaultLocale: "en"
// Set the current locale to `en`.
, locale: "en"
// Set the translation key separator.
, defaultSeparator: "."
// Set the placeholder format. Accepts `{placeholder}}` and `%{placeholder}`.}
, placeholder: /(?:\{\{|%\{)(.*?)(?:\}\}?)/gm
// Set if engine should fallback to the default locale when a translation
// is missing.
, fallbacks: false
// Set the default translation object.
, translations: {}
// Set missing translation behavior. 'message' will display a message
// that the translation is missing, 'guess' will try to guess the string
, missingBehaviour: 'message'
// if you use missingBehaviour with 'message', but want to know that the
// string is actually missing for testing purposes, you can prefix the
// guessed string by setting the value here. By default, no prefix!
, missingTranslationPrefix: ''
};
I18n.reset = function() {
// Set default locale. This locale will be used when fallback is enabled and
// the translation doesn't exist in a particular locale.
this.defaultLocale = DEFAULT_OPTIONS.defaultLocale;
// Set the current locale to `en`.
this.locale = DEFAULT_OPTIONS.locale;
// Set the translation key separator.
this.defaultSeparator = DEFAULT_OPTIONS.defaultSeparator;
// Set the placeholder format. Accepts `{{placeholder}}` and `%{placeholder}`.
this.placeholder = DEFAULT_OPTIONS.placeholder;
// Set if engine should fallback to the default locale when a translation
// is missing.
this.fallbacks = DEFAULT_OPTIONS.fallbacks;
// Set the default translation object.
this.translations = DEFAULT_OPTIONS.translations;
// Set the default missing behaviour
this.missingBehaviour = DEFAULT_OPTIONS.missingBehaviour;
// Set the default missing string prefix for guess behaviour
this.missingTranslationPrefix = DEFAULT_OPTIONS.missingTranslationPrefix;
};
// Much like `reset`, but only assign options if not already assigned
I18n.initializeOptions = function() {
if (typeof(this.defaultLocale) === "undefined" && this.defaultLocale !== null)
this.defaultLocale = DEFAULT_OPTIONS.defaultLocale;
if (typeof(this.locale) === "undefined" && this.locale !== null)
this.locale = DEFAULT_OPTIONS.locale;
if (typeof(this.defaultSeparator) === "undefined" && this.defaultSeparator !== null)
this.defaultSeparator = DEFAULT_OPTIONS.defaultSeparator;
if (typeof(this.placeholder) === "undefined" && this.placeholder !== null)
this.placeholder = DEFAULT_OPTIONS.placeholder;
if (typeof(this.fallbacks) === "undefined" && this.fallbacks !== null)
this.fallbacks = DEFAULT_OPTIONS.fallbacks;
if (typeof(this.translations) === "undefined" && this.translations !== null)
this.translations = DEFAULT_OPTIONS.translations;
};
I18n.initializeOptions();
// Return a list of all locales that must be tried before returning the
// missing translation message. By default, this will consider the inline option,
// current locale and fallback locale.
//
// I18n.locales.get("de-DE");
// // ["de-DE", "de", "en"]
//
// You can define custom rules for any locale. Just make sure you return a array
// containing all locales.
//
// // Default the Wookie locale to English.
// I18n.locales["wk"] = function(locale) {
// return ["en"];
// };
//
I18n.locales = {};
// Retrieve locales based on inline locale, current locale or default to
// I18n's detection.
I18n.locales.get = function(locale) {
var result = this[locale] || this[I18n.locale] || this["default"];
if (typeof(result) === "function") {
result = result(locale);
}
if (result instanceof Array === false) {
result = [result];
}
return result;
};
// The default locale list.
I18n.locales["default"] = function(locale) {
var locales = []
, list = []
, countryCode
, count
;
// Handle the inline locale option that can be provided to
// the `I18n.t` options.
if (locale) {
locales.push(locale);
}
// Add the current locale to the list.
if (!locale && I18n.locale) {
locales.push(I18n.locale);
}
// Add the default locale if fallback strategy is enabled.
if (I18n.fallbacks && I18n.defaultLocale) {
locales.push(I18n.defaultLocale);
}
// Compute each locale with its country code.
// So this will return an array containing both
// `de-DE` and `de` locales.
locales.forEach(function(locale){
countryCode = locale.split("-")[0];
if (!~list.indexOf(locale)) {
list.push(locale);
}
if (I18n.fallbacks && countryCode && countryCode !== locale && !~list.indexOf(countryCode)) {
list.push(countryCode);
}
});
// No locales set? English it is.
if (!locales.length) {
locales.push("en");
}
return list;
};
// Hold pluralization rules.
I18n.pluralization = {};
// Return the pluralizer for a specific locale.
// If no specify locale is found, then I18n's default will be used.
I18n.pluralization.get = function(locale) {
return this[locale] || this[I18n.locale] || this["default"];
};
// The default pluralizer rule.
// It detects the `zero`, `one`, and `other` scopes.
I18n.pluralization["default"] = function(count) {
switch (count) {
case 0: return ["zero", "other"];
case 1: return ["one"];
default: return ["other"];
}
};
// Return current locale. If no locale has been set, then
// the current locale will be the default locale.
I18n.currentLocale = function() {
return this.locale || this.defaultLocale;
};
// Check if value is different than undefined and null;
I18n.isSet = function(value) {
return value !== undefined && value !== null;
};
// Find and process the translation using the provided scope and options.
// This is used internally by some functions and should not be used as an
// public API.
I18n.lookup = function(scope, options) {
options = this.prepareOptions(options);
var locales = this.locales.get(options.locale).slice()
, requestedLocale = locales[0]
, locale
, scopes
, translations
;
scope = this.getFullScope(scope, options);
while (locales.length) {
locale = locales.shift();
scopes = scope.split(this.defaultSeparator);
translations = this.translations[locale];
if (!translations) {
continue;
}
while (scopes.length) {
translations = translations[scopes.shift()];
if (translations === undefined || translations === null) {
break;
}
}
if (translations !== undefined && translations !== null) {
return translations;
}
}
if (this.isSet(options.defaultValue)) {
return options.defaultValue;
}
};
// Rails changed the way the meridian is stored.
// It started with `date.meridian` returning an array,
// then it switched to `time.am` and `time.pm`.
// This function abstracts this difference and returns
// the correct meridian or the default value when none is provided.
I18n.meridian = function() {
var time = this.lookup("time");
var date = this.lookup("date");
if (time && time.am && time.pm) {
return [time.am, time.pm];
} else if (date && date.meridian) {
return date.meridian;
} else {
return DATE.meridian;
}
};
// Merge serveral hash options, checking if value is set before
// overwriting any value. The precedence is from left to right.
//
// I18n.prepareOptions({name: "John Doe"}, {name: "Mary Doe", role: "user"});
// #=> {name: "John Doe", role: "user"}
//
I18n.prepareOptions = function() {
var args = slice.call(arguments)
, options = {}
, subject
;
while (args.length) {
subject = args.shift();
if (typeof(subject) != "object") {
continue;
}
for (var attr in subject) {
if (!subject.hasOwnProperty(attr)) {
continue;
}
if (this.isSet(options[attr])) {
continue;
}
options[attr] = subject[attr];
}
}
return options;
};
// Generate a list of translation options for default fallbacks.
// `defaultValue` is also deleted from options as it is returned as part of
// the translationOptions array.
I18n.createTranslationOptions = function(scope, options) {
var translationOptions = [{scope: scope}];
// Defaults should be an array of hashes containing either
// fallback scopes or messages
if (this.isSet(options.defaults)) {
translationOptions = translationOptions.concat(options.defaults);
}
// Maintain support for defaultValue. Since it is always a message
// insert it in to the translation options as such.
if (this.isSet(options.defaultValue)) {
translationOptions.push({ message: options.defaultValue });
delete options.defaultValue;
}
return translationOptions;
};
// Translate the given scope with the provided options.
I18n.translate = function(scope, options) {
options = this.prepareOptions(options);
var translationOptions = this.createTranslationOptions(scope, options);
var translation;
// Iterate through the translation options until a translation
// or message is found.
var translationFound =
translationOptions.some(function(translationOption) {
if (this.isSet(translationOption.scope)) {
translation = this.lookup(translationOption.scope, options);
} else if (this.isSet(translationOption.message)) {
translation = translationOption.message;
}
if (translation !== undefined && translation !== null) {
return true;
}
}, this);
if (!translationFound) {
return this.missingTranslation(scope, options);
}
if (typeof(translation) === "string") {
translation = this.interpolate(translation, options);
} else if (translation instanceof Object && this.isSet(options.count)) {
translation = this.pluralize(options.count, translation, options);
}
return translation;
};
// This function interpolates the all variables in the given message.
I18n.interpolate = function(message, options) {
options = this.prepareOptions(options);
var matches = message.match(this.placeholder)
, placeholder
, value
, name
, regex
;
if (!matches) {
return message;
}
var value;
while (matches.length) {
placeholder = matches.shift();
name = placeholder.replace(this.placeholder, "$1");
if (this.isSet(options[name])) {
value = options[name].toString().replace(/\$/gm, "_#$#_");
} else if (name in options) {
value = this.nullPlaceholder(placeholder, message);
} else {
value = this.missingPlaceholder(placeholder, message);
}
regex = new RegExp(placeholder.replace(/\{/gm, "\\{").replace(/\}/gm, "\\}"));
message = message.replace(regex, value);
}
return message.replace(/_#\$#_/g, "$");
};
// Pluralize the given scope using the `count` value.
// The pluralized translation may have other placeholders,
// which will be retrieved from `options`.
I18n.pluralize = function(count, scope, options) {
options = this.prepareOptions(options);
var translations, pluralizer, keys, key, message;
if (scope instanceof Object) {
translations = scope;
} else {
translations = this.lookup(scope, options);
}
if (!translations) {
return this.missingTranslation(scope, options);
}
pluralizer = this.pluralization.get(options.locale);
keys = pluralizer(count);
while (keys.length) {
key = keys.shift();
if (this.isSet(translations[key])) {
message = translations[key];
break;
}
}
options.count = String(count);
return this.interpolate(message, options);
};
// Return a missing translation message for the given parameters.
I18n.missingTranslation = function(scope, options) {
//guess intended string
if(this.missingBehaviour == 'guess'){
//get only the last portion of the scope
var s = scope.split('.').slice(-1)[0];
//replace underscore with space && camelcase with space and lowercase letter
return (this.missingTranslationPrefix.length > 0 ? this.missingTranslationPrefix : '') +
s.replace('_',' ').replace(/([a-z])([A-Z])/g,
function(match, p1, p2) {return p1 + ' ' + p2.toLowerCase()} );
}
var fullScope = this.getFullScope(scope, options);
var fullScopeWithLocale = [this.currentLocale(), fullScope].join(this.defaultSeparator);
return '[missing "' + fullScopeWithLocale + '" translation]';
};
// Return a missing placeholder message for given parameters
I18n.missingPlaceholder = function(placeholder, message) {
return "[missing " + placeholder + " value]";
};
I18n.nullPlaceholder = function() {
return I18n.missingPlaceholder.apply(I18n, arguments);
};
// Format number using localization rules.
// The options will be retrieved from the `number.format` scope.
// If this isn't present, then the following options will be used:
//
// - `precision`: `3`
// - `separator`: `"."`
// - `delimiter`: `","`
// - `strip_insignificant_zeros`: `false`
//
// You can also override these options by providing the `options` argument.
//
I18n.toNumber = function(number, options) {
options = this.prepareOptions(
options
, this.lookup("number.format")
, NUMBER_FORMAT
);
var negative = number < 0
, string = Math.abs(number).toFixed(options.precision).toString()
, parts = string.split(".")
, precision
, buffer = []
, formattedNumber
, format = options.format || "%n"
, sign = negative ? "-" : ""
;
number = parts[0];
precision = parts[1];
while (number.length > 0) {
buffer.unshift(number.substr(Math.max(0, number.length - 3), 3));
number = number.substr(0, number.length -3);
}
formattedNumber = buffer.join(options.delimiter);
if (options.strip_insignificant_zeros && precision) {
precision = precision.replace(/0+$/, "");
}
if (options.precision > 0 && precision) {
formattedNumber += options.separator + precision;
}
if (options.sign_first) {
format = "%s" + format;
}
else {
format = format.replace("%n", "%s%n");
}
formattedNumber = format
.replace("%u", options.unit)
.replace("%n", formattedNumber)
.replace("%s", sign)
;
return formattedNumber;
};
// Format currency with localization rules.
// The options will be retrieved from the `number.currency.format` and
// `number.format` scopes, in that order.
//
// Any missing option will be retrieved from the `I18n.toNumber` defaults and
// the following options:
//
// - `unit`: `"$"`
// - `precision`: `2`
// - `format`: `"%u%n"`
// - `delimiter`: `","`
// - `separator`: `"."`
//
// You can also override these options by providing the `options` argument.
//
I18n.toCurrency = function(number, options) {
options = this.prepareOptions(
options
, this.lookup("number.currency.format")
, this.lookup("number.format")
, CURRENCY_FORMAT
);
return this.toNumber(number, options);
};
// Localize several values.
// You can provide the following scopes: `currency`, `number`, or `percentage`.
// If you provide a scope that matches the `/^(date|time)/` regular expression
// then the `value` will be converted by using the `I18n.toTime` function.
//
// It will default to the value's `toString` function.
//
I18n.localize = function(scope, value, options) {
options || (options = {});
switch (scope) {
case "currency":
return this.toCurrency(value);
case "number":
scope = this.lookup("number.format");
return this.toNumber(value, scope);
case "percentage":
return this.toPercentage(value);
default:
var localizedValue;
if (scope.match(/^(date|time)/)) {
localizedValue = this.toTime(scope, value);
} else {
localizedValue = value.toString();
}
return this.interpolate(localizedValue, options);
}
};
// Parse a given `date` string into a JavaScript Date object.
// This function is time zone aware.
//
// The following string formats are recognized:
//
// yyyy-mm-dd
// yyyy-mm-dd[ T]hh:mm::ss
// yyyy-mm-dd[ T]hh:mm::ss
// yyyy-mm-dd[ T]hh:mm::ssZ
// yyyy-mm-dd[ T]hh:mm::ss+0000
// yyyy-mm-dd[ T]hh:mm::ss+00:00
// yyyy-mm-dd[ T]hh:mm::ss.123Z
//
I18n.parseDate = function(date) {
var matches, convertedDate, fraction;
// we have a date, so just return it.
if (typeof(date) == "object") {
return date;
};
matches = date.toString().match(/(\d{4})-(\d{2})-(\d{2})(?:[ T](\d{2}):(\d{2}):(\d{2})([\.,]\d{1,3})?)?(Z|\+00:?00)?/);
if (matches) {
for (var i = 1; i <= 6; i++) {
matches[i] = parseInt(matches[i], 10) || 0;
}
// month starts on 0
matches[2] -= 1;
fraction = matches[7] ? 1000 * ("0" + matches[7]) : null;
if (matches[8]) {
convertedDate = new Date(Date.UTC(matches[1], matches[2], matches[3], matches[4], matches[5], matches[6], fraction));
} else {
convertedDate = new Date(matches[1], matches[2], matches[3], matches[4], matches[5], matches[6], fraction);
}
} else if (typeof(date) == "number") {
// UNIX timestamp
convertedDate = new Date();
convertedDate.setTime(date);
} else if (date.match(/([A-Z][a-z]{2}) ([A-Z][a-z]{2}) (\d+) (\d+:\d+:\d+) ([+-]\d+) (\d+)/)) {
// This format `Wed Jul 20 13:03:39 +0000 2011` is parsed by
// webkit/firefox, but not by IE, so we must parse it manually.
convertedDate = new Date();
convertedDate.setTime(Date.parse([
RegExp.$1, RegExp.$2, RegExp.$3, RegExp.$6, RegExp.$4, RegExp.$5
].join(" ")));
} else if (date.match(/\d+ \d+:\d+:\d+ [+-]\d+ \d+/)) {
// a valid javascript format with timezone info
convertedDate = new Date();
convertedDate.setTime(Date.parse(date));
} else {
// an arbitrary javascript string
convertedDate = new Date();
convertedDate.setTime(Date.parse(date));
}
return convertedDate;
};
// Formats time according to the directives in the given format string.
// The directives begins with a percent (%) character. Any text not listed as a
// directive will be passed through to the output string.
//
// The accepted formats are:
//
// %a - The abbreviated weekday name (Sun)
// %A - The full weekday name (Sunday)
// %b - The abbreviated month name (Jan)
// %B - The full month name (January)
// %c - The preferred local date and time representation
// %d - Day of the month (01..31)
// %-d - Day of the month (1..31)
// %H - Hour of the day, 24-hour clock (00..23)
// %-H - Hour of the day, 24-hour clock (0..23)
// %I - Hour of the day, 12-hour clock (01..12)
// %-I - Hour of the day, 12-hour clock (1..12)
// %m - Month of the year (01..12)
// %-m - Month of the year (1..12)
// %M - Minute of the hour (00..59)
// %-M - Minute of the hour (0..59)
// %p - Meridian indicator (AM or PM)
// %S - Second of the minute (00..60)
// %-S - Second of the minute (0..60)
// %w - Day of the week (Sunday is 0, 0..6)
// %y - Year without a century (00..99)
// %-y - Year without a century (0..99)
// %Y - Year with century
// %z - Timezone offset (+0545)
//
I18n.strftime = function(date, format) {
var options = this.lookup("date")
, meridianOptions = I18n.meridian()
;
if (!options) {
options = {};
}
options = this.prepareOptions(options, DATE);
var weekDay = date.getDay()
, day = date.getDate()
, year = date.getFullYear()
, month = date.getMonth() + 1
, hour = date.getHours()
, hour12 = hour
, meridian = hour > 11 ? 1 : 0
, secs = date.getSeconds()
, mins = date.getMinutes()
, offset = date.getTimezoneOffset()
, absOffsetHours = Math.floor(Math.abs(offset / 60))
, absOffsetMinutes = Math.abs(offset) - (absOffsetHours * 60)
, timezoneoffset = (offset > 0 ? "-" : "+") +
(absOffsetHours.toString().length < 2 ? "0" + absOffsetHours : absOffsetHours) +
(absOffsetMinutes.toString().length < 2 ? "0" + absOffsetMinutes : absOffsetMinutes)
;
if (hour12 > 12) {
hour12 = hour12 - 12;
} else if (hour12 === 0) {
hour12 = 12;
}
format = format.replace("%a", options.abbr_day_names[weekDay]);
format = format.replace("%A", options.day_names[weekDay]);
format = format.replace("%b", options.abbr_month_names[month]);
format = format.replace("%B", options.month_names[month]);
format = format.replace("%d", padding(day));
format = format.replace("%e", day);
format = format.replace("%-d", day);
format = format.replace("%H", padding(hour));
format = format.replace("%-H", hour);
format = format.replace("%I", padding(hour12));
format = format.replace("%-I", hour12);
format = format.replace("%m", padding(month));
format = format.replace("%-m", month);
format = format.replace("%M", padding(mins));
format = format.replace("%-M", mins);
format = format.replace("%p", meridianOptions[meridian]);
format = format.replace("%S", padding(secs));
format = format.replace("%-S", secs);
format = format.replace("%w", weekDay);
format = format.replace("%y", padding(year));
format = format.replace("%-y", padding(year).replace(/^0+/, ""));
format = format.replace("%Y", year);
format = format.replace("%z", timezoneoffset);
return format;
};
// Convert the given dateString into a formatted date.
I18n.toTime = function(scope, dateString) {
var date = this.parseDate(dateString)
, format = this.lookup(scope)
;
if (date.toString().match(/invalid/i)) {
return date.toString();
}
if (!format) {
return date.toString();
}
return this.strftime(date, format);
};
// Convert a number into a formatted percentage value.
I18n.toPercentage = function(number, options) {
options = this.prepareOptions(
options
, this.lookup("number.percentage.format")
, this.lookup("number.format")
, PERCENTAGE_FORMAT
);
return this.toNumber(number, options);
};
// Convert a number into a readable size representation.
I18n.toHumanSize = function(number, options) {
var kb = 1024
, size = number
, iterations = 0
, unit
, precision
;
while (size >= kb && iterations < 4) {
size = size / kb;
iterations += 1;
}
if (iterations === 0) {
unit = this.t("number.human.storage_units.units.byte", {count: size});
precision = 0;
} else {
unit = this.t("number.human.storage_units.units." + SIZE_UNITS[iterations]);
precision = (size - Math.floor(size) === 0) ? 0 : 1;
}
options = this.prepareOptions(
options
, {unit: unit, precision: precision, format: "%n%u", delimiter: ""}
);
return this.toNumber(size, options);
};
I18n.getFullScope = function(scope, options) {
options = this.prepareOptions(options);
// Deal with the scope as an array.
if (scope.constructor === Array) {
scope = scope.join(this.defaultSeparator);
}
// Deal with the scope option provided through the second argument.
//
// I18n.t('hello', {scope: 'greetings'});
//
if (options.scope) {
scope = [options.scope, scope].join(this.defaultSeparator);
}
return scope;
}
// Set aliases, so we can save some typing.
I18n.t = I18n.translate;
I18n.l = I18n.localize;
I18n.p = I18n.pluralize;
return I18n;
}));