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angular-cn/packages/common/src/i18n/localization.ts

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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {Inject, Injectable, InjectionToken, LOCALE_ID, Optional} from '@angular/core';
import {Plural, getLocalePluralCase} from './locale_data_api';
/**
* @deprecated from v5
*/
export const DEPRECATED_PLURAL_FN = new InjectionToken<boolean>('UseV4Plurals');
/**
* @publicApi
*/
export abstract class NgLocalization {
abstract getPluralCategory(value: any, locale?: string): string;
}
/**
* Returns the plural category for a given value.
* - "=value" when the case exists,
* - the plural category otherwise
*/
export function getPluralCategory(
value: number, cases: string[], ngLocalization: NgLocalization, locale?: string): string {
let key = `=${value}`;
if (cases.indexOf(key) > -1) {
return key;
}
key = ngLocalization.getPluralCategory(value, locale);
if (cases.indexOf(key) > -1) {
return key;
}
if (cases.indexOf('other') > -1) {
return 'other';
}
throw new Error(`No plural message found for value "${value}"`);
}
/**
* Returns the plural case based on the locale
*
* @publicApi
*/
@Injectable()
export class NgLocaleLocalization extends NgLocalization {
constructor(
@Inject(LOCALE_ID) protected locale: string,
/** @deprecated from v5 */
@Optional() @Inject(DEPRECATED_PLURAL_FN) protected deprecatedPluralFn?:
((locale: string, value: number|string) => Plural)|null) {
super();
}
getPluralCategory(value: any, locale?: string): string {
const plural = this.deprecatedPluralFn ? this.deprecatedPluralFn(locale || this.locale, value) :
getLocalePluralCase(locale || this.locale)(value);
switch (plural) {
case Plural.Zero:
return 'zero';
case Plural.One:
return 'one';
case Plural.Two:
return 'two';
case Plural.Few:
return 'few';
case Plural.Many:
return 'many';
default:
return 'other';
}
}
}
/**
* Returns the plural case based on the locale
*
* @deprecated from v5 the plural case function is in locale data files common/locales/*.ts
* @publicApi
*/
export function getPluralCase(locale: string, nLike: number | string): Plural {
// TODO(vicb): lazy compute
if (typeof nLike === 'string') {
nLike = parseInt(<string>nLike, 10);
}
const n: number = nLike as number;
const nDecimal = n.toString().replace(/^[^.]*\.?/, '');
const i = Math.floor(Math.abs(n));
const v = nDecimal.length;
const f = parseInt(nDecimal, 10);
const t = parseInt(n.toString().replace(/^[^.]*\.?|0+$/g, ''), 10) || 0;
const lang = locale.split('-')[0].toLowerCase();
switch (lang) {
case 'af':
case 'asa':
case 'az':
case 'bem':
case 'bez':
case 'bg':
case 'brx':
case 'ce':
case 'cgg':
case 'chr':
case 'ckb':
case 'ee':
case 'el':
case 'eo':
case 'es':
case 'eu':
case 'fo':
case 'fur':
case 'gsw':
case 'ha':
case 'haw':
case 'hu':
case 'jgo':
case 'jmc':
case 'ka':
case 'kk':
case 'kkj':
case 'kl':
case 'ks':
case 'ksb':
case 'ky':
case 'lb':
case 'lg':
case 'mas':
case 'mgo':
case 'ml':
case 'mn':
case 'nb':
case 'nd':
case 'ne':
case 'nn':
case 'nnh':
case 'nyn':
case 'om':
case 'or':
case 'os':
case 'ps':
case 'rm':
case 'rof':
case 'rwk':
case 'saq':
case 'seh':
case 'sn':
case 'so':
case 'sq':
case 'ta':
case 'te':
case 'teo':
case 'tk':
case 'tr':
case 'ug':
case 'uz':
case 'vo':
case 'vun':
case 'wae':
case 'xog':
if (n === 1) return Plural.One;
return Plural.Other;
case 'ak':
case 'ln':
case 'mg':
case 'pa':
case 'ti':
if (n === Math.floor(n) && n >= 0 && n <= 1) return Plural.One;
return Plural.Other;
case 'am':
case 'as':
case 'bn':
case 'fa':
case 'gu':
case 'hi':
case 'kn':
case 'mr':
case 'zu':
if (i === 0 || n === 1) return Plural.One;
return Plural.Other;
case 'ar':
if (n === 0) return Plural.Zero;
if (n === 1) return Plural.One;
if (n === 2) return Plural.Two;
if (n % 100 === Math.floor(n % 100) && n % 100 >= 3 && n % 100 <= 10) return Plural.Few;
if (n % 100 === Math.floor(n % 100) && n % 100 >= 11 && n % 100 <= 99) return Plural.Many;
return Plural.Other;
case 'ast':
case 'ca':
case 'de':
case 'en':
case 'et':
case 'fi':
case 'fy':
case 'gl':
case 'it':
case 'nl':
case 'sv':
case 'sw':
case 'ur':
case 'yi':
if (i === 1 && v === 0) return Plural.One;
return Plural.Other;
case 'be':
if (n % 10 === 1 && !(n % 100 === 11)) return Plural.One;
if (n % 10 === Math.floor(n % 10) && n % 10 >= 2 && n % 10 <= 4 &&
!(n % 100 >= 12 && n % 100 <= 14))
return Plural.Few;
if (n % 10 === 0 || n % 10 === Math.floor(n % 10) && n % 10 >= 5 && n % 10 <= 9 ||
n % 100 === Math.floor(n % 100) && n % 100 >= 11 && n % 100 <= 14)
return Plural.Many;
return Plural.Other;
case 'br':
if (n % 10 === 1 && !(n % 100 === 11 || n % 100 === 71 || n % 100 === 91)) return Plural.One;
if (n % 10 === 2 && !(n % 100 === 12 || n % 100 === 72 || n % 100 === 92)) return Plural.Two;
if (n % 10 === Math.floor(n % 10) && (n % 10 >= 3 && n % 10 <= 4 || n % 10 === 9) &&
!(n % 100 >= 10 && n % 100 <= 19 || n % 100 >= 70 && n % 100 <= 79 ||
n % 100 >= 90 && n % 100 <= 99))
return Plural.Few;
if (!(n === 0) && n % 1e6 === 0) return Plural.Many;
return Plural.Other;
case 'bs':
case 'hr':
case 'sr':
if (v === 0 && i % 10 === 1 && !(i % 100 === 11) || f % 10 === 1 && !(f % 100 === 11))
return Plural.One;
if (v === 0 && i % 10 === Math.floor(i % 10) && i % 10 >= 2 && i % 10 <= 4 &&
!(i % 100 >= 12 && i % 100 <= 14) ||
f % 10 === Math.floor(f % 10) && f % 10 >= 2 && f % 10 <= 4 &&
!(f % 100 >= 12 && f % 100 <= 14))
return Plural.Few;
return Plural.Other;
case 'cs':
case 'sk':
if (i === 1 && v === 0) return Plural.One;
if (i === Math.floor(i) && i >= 2 && i <= 4 && v === 0) return Plural.Few;
if (!(v === 0)) return Plural.Many;
return Plural.Other;
case 'cy':
if (n === 0) return Plural.Zero;
if (n === 1) return Plural.One;
if (n === 2) return Plural.Two;
if (n === 3) return Plural.Few;
if (n === 6) return Plural.Many;
return Plural.Other;
case 'da':
if (n === 1 || !(t === 0) && (i === 0 || i === 1)) return Plural.One;
return Plural.Other;
case 'dsb':
case 'hsb':
if (v === 0 && i % 100 === 1 || f % 100 === 1) return Plural.One;
if (v === 0 && i % 100 === 2 || f % 100 === 2) return Plural.Two;
if (v === 0 && i % 100 === Math.floor(i % 100) && i % 100 >= 3 && i % 100 <= 4 ||
f % 100 === Math.floor(f % 100) && f % 100 >= 3 && f % 100 <= 4)
return Plural.Few;
return Plural.Other;
case 'ff':
case 'fr':
case 'hy':
case 'kab':
if (i === 0 || i === 1) return Plural.One;
return Plural.Other;
case 'fil':
if (v === 0 && (i === 1 || i === 2 || i === 3) ||
v === 0 && !(i % 10 === 4 || i % 10 === 6 || i % 10 === 9) ||
!(v === 0) && !(f % 10 === 4 || f % 10 === 6 || f % 10 === 9))
return Plural.One;
return Plural.Other;
case 'ga':
if (n === 1) return Plural.One;
if (n === 2) return Plural.Two;
if (n === Math.floor(n) && n >= 3 && n <= 6) return Plural.Few;
if (n === Math.floor(n) && n >= 7 && n <= 10) return Plural.Many;
return Plural.Other;
case 'gd':
if (n === 1 || n === 11) return Plural.One;
if (n === 2 || n === 12) return Plural.Two;
if (n === Math.floor(n) && (n >= 3 && n <= 10 || n >= 13 && n <= 19)) return Plural.Few;
return Plural.Other;
case 'gv':
if (v === 0 && i % 10 === 1) return Plural.One;
if (v === 0 && i % 10 === 2) return Plural.Two;
if (v === 0 &&
(i % 100 === 0 || i % 100 === 20 || i % 100 === 40 || i % 100 === 60 || i % 100 === 80))
return Plural.Few;
if (!(v === 0)) return Plural.Many;
return Plural.Other;
case 'he':
if (i === 1 && v === 0) return Plural.One;
if (i === 2 && v === 0) return Plural.Two;
if (v === 0 && !(n >= 0 && n <= 10) && n % 10 === 0) return Plural.Many;
return Plural.Other;
case 'is':
if (t === 0 && i % 10 === 1 && !(i % 100 === 11) || !(t === 0)) return Plural.One;
return Plural.Other;
case 'ksh':
if (n === 0) return Plural.Zero;
if (n === 1) return Plural.One;
return Plural.Other;
case 'kw':
case 'naq':
case 'se':
case 'smn':
if (n === 1) return Plural.One;
if (n === 2) return Plural.Two;
return Plural.Other;
case 'lag':
if (n === 0) return Plural.Zero;
if ((i === 0 || i === 1) && !(n === 0)) return Plural.One;
return Plural.Other;
case 'lt':
if (n % 10 === 1 && !(n % 100 >= 11 && n % 100 <= 19)) return Plural.One;
if (n % 10 === Math.floor(n % 10) && n % 10 >= 2 && n % 10 <= 9 &&
!(n % 100 >= 11 && n % 100 <= 19))
return Plural.Few;
if (!(f === 0)) return Plural.Many;
return Plural.Other;
case 'lv':
case 'prg':
if (n % 10 === 0 || n % 100 === Math.floor(n % 100) && n % 100 >= 11 && n % 100 <= 19 ||
v === 2 && f % 100 === Math.floor(f % 100) && f % 100 >= 11 && f % 100 <= 19)
return Plural.Zero;
if (n % 10 === 1 && !(n % 100 === 11) || v === 2 && f % 10 === 1 && !(f % 100 === 11) ||
!(v === 2) && f % 10 === 1)
return Plural.One;
return Plural.Other;
case 'mk':
if (v === 0 && i % 10 === 1 || f % 10 === 1) return Plural.One;
return Plural.Other;
case 'mt':
if (n === 1) return Plural.One;
if (n === 0 || n % 100 === Math.floor(n % 100) && n % 100 >= 2 && n % 100 <= 10)
return Plural.Few;
if (n % 100 === Math.floor(n % 100) && n % 100 >= 11 && n % 100 <= 19) return Plural.Many;
return Plural.Other;
case 'pl':
if (i === 1 && v === 0) return Plural.One;
if (v === 0 && i % 10 === Math.floor(i % 10) && i % 10 >= 2 && i % 10 <= 4 &&
!(i % 100 >= 12 && i % 100 <= 14))
return Plural.Few;
if (v === 0 && !(i === 1) && i % 10 === Math.floor(i % 10) && i % 10 >= 0 && i % 10 <= 1 ||
v === 0 && i % 10 === Math.floor(i % 10) && i % 10 >= 5 && i % 10 <= 9 ||
v === 0 && i % 100 === Math.floor(i % 100) && i % 100 >= 12 && i % 100 <= 14)
return Plural.Many;
return Plural.Other;
case 'pt':
if (n === Math.floor(n) && n >= 0 && n <= 2 && !(n === 2)) return Plural.One;
return Plural.Other;
case 'ro':
if (i === 1 && v === 0) return Plural.One;
if (!(v === 0) || n === 0 ||
!(n === 1) && n % 100 === Math.floor(n % 100) && n % 100 >= 1 && n % 100 <= 19)
return Plural.Few;
return Plural.Other;
case 'ru':
case 'uk':
if (v === 0 && i % 10 === 1 && !(i % 100 === 11)) return Plural.One;
if (v === 0 && i % 10 === Math.floor(i % 10) && i % 10 >= 2 && i % 10 <= 4 &&
!(i % 100 >= 12 && i % 100 <= 14))
return Plural.Few;
if (v === 0 && i % 10 === 0 ||
v === 0 && i % 10 === Math.floor(i % 10) && i % 10 >= 5 && i % 10 <= 9 ||
v === 0 && i % 100 === Math.floor(i % 100) && i % 100 >= 11 && i % 100 <= 14)
return Plural.Many;
return Plural.Other;
case 'shi':
if (i === 0 || n === 1) return Plural.One;
if (n === Math.floor(n) && n >= 2 && n <= 10) return Plural.Few;
return Plural.Other;
case 'si':
if (n === 0 || n === 1 || i === 0 && f === 1) return Plural.One;
return Plural.Other;
case 'sl':
if (v === 0 && i % 100 === 1) return Plural.One;
if (v === 0 && i % 100 === 2) return Plural.Two;
if (v === 0 && i % 100 === Math.floor(i % 100) && i % 100 >= 3 && i % 100 <= 4 || !(v === 0))
return Plural.Few;
return Plural.Other;
case 'tzm':
if (n === Math.floor(n) && n >= 0 && n <= 1 || n === Math.floor(n) && n >= 11 && n <= 99)
return Plural.One;
return Plural.Other;
// When there is no specification, the default is always "other"
// Spec: http://cldr.unicode.org/index/cldr-spec/plural-rules
// > other (required—general plural form — also used if the language only has a single form)
default:
return Plural.Other;
}
}
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