angular2
Version:
Angular 2 - a web framework for modern web apps
64 lines • 6.32 kB
JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
import { CONST, isStringMap, StringWrapper, isPresent, RegExpWrapper } from 'angular2/src/facade/lang';
import { Injectable, Pipe } from 'angular2/core';
import { InvalidPipeArgumentException } from './invalid_pipe_argument_exception';
var interpolationExp = RegExpWrapper.create('#');
/**
*
* Maps a value to a string that pluralizes the value properly.
*
* ## Usage
*
* expression | i18nPlural:mapping
*
* where `expression` is a number and `mapping` is an object that indicates the proper text for
* when the `expression` evaluates to 0, 1, or some other number. You can interpolate the actual
* value into the text using the `#` sign.
*
* ## Example
*
* ```
* <div>
* {{ messages.length | i18nPlural: messageMapping }}
* </div>
*
* class MyApp {
* messages: any[];
* messageMapping: any = {
* '=0': 'No messages.',
* '=1': 'One message.',
* 'other': '# messages.'
* }
* ...
* }
* ```
*
*/
export let I18nPluralPipe = class {
transform(value, args = null) {
var key;
var valueStr;
var pluralMap = args[0];
if (!isStringMap(pluralMap)) {
throw new InvalidPipeArgumentException(I18nPluralPipe, pluralMap);
}
key = value === 0 || value === 1 ? `=${value}` : 'other';
valueStr = isPresent(value) ? value.toString() : '';
return StringWrapper.replaceAll(pluralMap[key], interpolationExp, valueStr);
}
};
I18nPluralPipe = __decorate([
CONST(),
Pipe({ name: 'i18nPlural', pure: true }),
Injectable(),
__metadata('design:paramtypes', [])
], I18nPluralPipe);
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