angular/modules/@angular/core/src/application_tokens.ts
2016-06-09 17:00:15 -07:00

57 lines
1.7 KiB
TypeScript

import {Math, StringWrapper} from '../src/facade/lang';
import {OpaqueToken} from './di';
/**
* A DI Token representing a unique string id assigned to the application by Angular and used
* primarily for prefixing application attributes and CSS styles when
* {@link ViewEncapsulation#Emulated} is being used.
*
* If you need to avoid randomly generated value to be used as an application id, you can provide
* a custom value via a DI provider <!-- TODO: provider --> configuring the root {@link Injector}
* using this token.
* @experimental
*/
export const APP_ID: any = /*@ts2dart_const*/ new OpaqueToken('AppId');
function _appIdRandomProviderFactory() {
return `${_randomChar()}${_randomChar()}${_randomChar()}`;
}
/**
* Providers that will generate a random APP_ID_TOKEN.
* @experimental
*/
export const APP_ID_RANDOM_PROVIDER =
/*@ts2dart_const*/ /* @ts2dart_Provider */ {
provide: APP_ID,
useFactory: _appIdRandomProviderFactory,
deps: [] as any
};
function _randomChar(): string {
return StringWrapper.fromCharCode(97 + Math.floor(Math.random() * 25));
}
/**
* A function that will be executed when a platform is initialized.
* @experimental
*/
export const PLATFORM_INITIALIZER: any =
/*@ts2dart_const*/ new OpaqueToken('Platform Initializer');
/**
* A function that will be executed when an application is initialized.
* @experimental
*/
export const APP_INITIALIZER: any =
/*@ts2dart_const*/ new OpaqueToken('Application Initializer');
/**
* A token which indicates the root directory of the application
* @experimental
*/
export const PACKAGE_ROOT_URL: any =
/*@ts2dart_const*/ new OpaqueToken('Application Packages Root URL');