angular-docs-cn/modules/@angular/router/upgrade.ts

91 lines
2.5 KiB
TypeScript

/**
* @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 {APP_BOOTSTRAP_LISTENER, ApplicationRef, ComponentRef, InjectionToken} from '@angular/core';
import {ExtraOptions, ROUTER_CONFIGURATION, ROUTER_INITIALIZER, Router, RouterPreloader} from '@angular/router';
import {UpgradeModule} from '@angular/upgrade/static';
/**
* @whatItDoes Creates an initializer that in addition to setting up the Angular
* router sets up the ngRoute integration.
*
* @howToUse
*
* ```
* @NgModule({
* imports: [
* RouterModule.forRoot(SOME_ROUTES),
* UpgradeModule
* ],
* providers: [
* RouterUpgradeInitializer
* ]
* })
* export class AppModule {
* ngDoBootstrap() {}
* }
* ```
*
* @experimental
*/
export const RouterUpgradeInitializer = {
provide: ROUTER_INITIALIZER,
useFactory: initialRouterNavigation,
deps: [UpgradeModule, ApplicationRef, RouterPreloader, ROUTER_CONFIGURATION]
};
/**
* @internal
*/
export function initialRouterNavigation(
ngUpgrade: UpgradeModule, ref: ApplicationRef, preloader: RouterPreloader,
opts: ExtraOptions): Function {
return () => {
if (!ngUpgrade.$injector) {
throw new Error(`
RouterUpgradeInitializer can be used only after UpgradeModule.bootstrap has been called.
Remove RouterUpgradeInitializer and call setUpLocationSync after UpgradeModule.bootstrap.
`);
}
const router = ngUpgrade.injector.get(Router);
const ref = ngUpgrade.injector.get(ApplicationRef);
(router as any).resetRootComponentType(ref.componentTypes[0]);
preloader.setUpPreloading();
if (opts.initialNavigation === false) {
router.setUpLocationChangeListener();
} else {
router.initialNavigation();
}
setUpLocationSync(ngUpgrade);
};
}
/**
* @whatItDoes Sets up a location synchronization.
*
* History.pushState does not fire onPopState, so the angular2 location
* doesn't detect it. The workaround is to attach a location change listener
*
* @experimental
*/
export function setUpLocationSync(ngUpgrade: UpgradeModule): void {
const router: Router = ngUpgrade.injector.get(Router);
const url = document.createElement('a');
ngUpgrade.$injector.get('$rootScope')
.$on('$locationChangeStart', (_: any, next: string, __: string) => {
url.href = next;
router.navigateByUrl(url.pathname);
});
}