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fix(router): run navigations serialy

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Closes #11754
This commit is contained in:
vsavkin
2016-10-28 14:56:08 -07:00
parent e391cacdf9
commit 091c390032
3 changed files with 169 additions and 42 deletions
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122
modules/@angular/router/src/router.ts
View File

@ -8,10 +8,12 @@
import {Location} from '@angular/common';
import {Compiler, ComponentFactoryResolver, Injector, NgModuleFactoryLoader, ReflectiveInjector, Type} from '@angular/core';
import {BehaviorSubject} from 'rxjs/BehaviorSubject';
import {Observable} from 'rxjs/Observable';
import {Subject} from 'rxjs/Subject';
import {Subscription} from 'rxjs/Subscription';
import {from} from 'rxjs/observable/from';
import {fromPromise} from 'rxjs/observable/fromPromise';
import {of } from 'rxjs/observable/of';
import {concatMap} from 'rxjs/operator/concatMap';
import {every} from 'rxjs/operator/every';
@ -275,6 +277,16 @@ function defaultErrorHandler(error: any): any {
throw error;
}
type NavigationParams = {
id: number,
rawUrl: UrlTree,
prevRawUrl: UrlTree,
extras: NavigationExtras,
resolve: any,
reject: any,
promise: Promise<boolean>
};
/**
* @whatItDoes Provides the navigation and url manipulation capabilities.
*
@ -287,11 +299,13 @@ function defaultErrorHandler(error: any): any {
export class Router {
private currentUrlTree: UrlTree;
private rawUrlTree: UrlTree;
private lastNavigation: UrlTree;
private navigations: BehaviorSubject<NavigationParams> =
new BehaviorSubject<NavigationParams>(null);
private routerEvents: Subject<Event> = new Subject<Event>();
private currentRouterState: RouterState;
private locationSubscription: Subscription;
private routerEvents: Subject<Event>;
private navigationId: number = 0;
private configLoader: RouterConfigLoader;
@ -321,11 +335,12 @@ export class Router {
private outletMap: RouterOutletMap, private location: Location, private injector: Injector,
loader: NgModuleFactoryLoader, compiler: Compiler, public config: Routes) {
this.resetConfig(config);
this.routerEvents = new Subject<Event>();
this.currentUrlTree = createEmptyUrlTree();
this.rawUrlTree = this.currentUrlTree;
this.configLoader = new RouterConfigLoader(loader, compiler);
this.currentRouterState = createEmptyState(this.currentUrlTree, this.rootComponentType);
this.processNavigations();
}
/**
@ -355,18 +370,8 @@ export class Router {
// which does not work properly with zone.js in IE and Safari
this.locationSubscription = <any>this.location.subscribe(Zone.current.wrap((change: any) => {
const rawUrlTree = this.urlSerializer.parse(change['url']);
const tree = this.urlHandlingStrategy.extract(rawUrlTree);
setTimeout(() => {
// we fire multiple events for a single URL change
// we should navigate only once
if (!this.lastNavigation || this.lastNavigation.toString() !== tree.toString()) {
this.scheduleNavigation(
rawUrlTree, tree, {skipLocationChange: change['pop'], replaceUrl: true});
} else {
this.rawUrlTree = rawUrlTree;
}
this.scheduleNavigation(rawUrlTree, {skipLocationChange: change['pop'], replaceUrl: true});
}, 0);
}));
}
@ -488,10 +493,11 @@ export class Router {
navigateByUrl(url: string|UrlTree, extras: NavigationExtras = {skipLocationChange: false}):
Promise<boolean> {
if (url instanceof UrlTree) {
return this.scheduleNavigation(this.rawUrlTree, url, extras);
return this.scheduleNavigation(this.urlHandlingStrategy.merge(url, this.rawUrlTree), extras);
} else {
const urlTree = this.urlSerializer.parse(url);
return this.scheduleNavigation(this.rawUrlTree, urlTree, extras);
return this.scheduleNavigation(
this.urlHandlingStrategy.merge(urlTree, this.rawUrlTree), extras);
}
}
@ -518,7 +524,7 @@ export class Router {
*/
navigate(commands: any[], extras: NavigationExtras = {skipLocationChange: false}):
Promise<boolean> {
return this.scheduleNavigation(this.rawUrlTree, this.createUrlTree(commands, extras), extras);
return this.navigateByUrl(this.createUrlTree(commands, extras), extras);
}
/**
@ -543,33 +549,76 @@ export class Router {
}
}
private scheduleNavigation(rawUrl: UrlTree, url: UrlTree, extras: NavigationExtras):
Promise<boolean> {
if (this.urlHandlingStrategy.shouldProcessUrl(url)) {
const id = ++this.navigationId;
this.routerEvents.next(new NavigationStart(id, this.serializeUrl(url)));
private processNavigations(): void {
concatMap
.call(
this.navigations,
(nav: NavigationParams) => {
if (nav) {
this.executeScheduledNavigation(nav);
// a failed navigation should not stop the router from processing
// further navigations => the catch
return nav.promise.catch(() => {});
} else {
return <any>of (null);
}
})
.subscribe(() => {});
}
return Promise.resolve().then(
(_) => this.runNavigate(
rawUrl, url, extras.skipLocationChange, extras.replaceUrl, id, null));
private scheduleNavigation(rawUrl: UrlTree, extras: NavigationExtras): Promise<boolean> {
const prevRawUrl = this.navigations.value ? this.navigations.value.rawUrl : null;
if (prevRawUrl && prevRawUrl.toString() === rawUrl.toString()) {
return this.navigations.value.promise;
}
let resolve: any = null;
let reject: any = null;
const promise = new Promise((res, rej) => {
resolve = res;
reject = rej;
});
const id = ++this.navigationId;
this.navigations.next({id, rawUrl, prevRawUrl, extras, resolve, reject, promise});
return promise;
}
private executeScheduledNavigation({id, rawUrl, prevRawUrl, extras, resolve,
reject}: NavigationParams): void {
const url = this.urlHandlingStrategy.extract(rawUrl);
const prevUrl = prevRawUrl ? this.urlHandlingStrategy.extract(prevRawUrl) : null;
const urlTransition = !prevUrl || url.toString() !== prevUrl.toString();
if (urlTransition && this.urlHandlingStrategy.shouldProcessUrl(rawUrl)) {
this.routerEvents.next(new NavigationStart(id, this.serializeUrl(url)));
Promise.resolve()
.then(
(_) => this.runNavigate(
url, rawUrl, extras.skipLocationChange, extras.replaceUrl, id, null))
.then(resolve, reject);
// we cannot process the current URL, but we could process the previous one =>
// we need to do some cleanup
} else if (this.urlHandlingStrategy.shouldProcessUrl(this.rawUrlTree)) {
const id = ++this.navigationId;
} else if (
urlTransition && prevRawUrl && this.urlHandlingStrategy.shouldProcessUrl(prevRawUrl)) {
this.routerEvents.next(new NavigationStart(id, this.serializeUrl(url)));
Promise.resolve()
.then(
(_) => this.runNavigate(
url, rawUrl, false, false, id, createEmptyState(url, this.rootComponentType)))
.then(resolve, reject);
return Promise.resolve().then(
(_) => this.runNavigate(
rawUrl, url, false, false, id, createEmptyState(url, this.rootComponentType)));
} else {
this.rawUrlTree = rawUrl;
return Promise.resolve(null);
resolve(null);
}
}
private runNavigate(
rawUrl: UrlTree, url: UrlTree, shouldPreventPushState: boolean, shouldReplaceUrl: boolean,
url: UrlTree, rawUrl: UrlTree, shouldPreventPushState: boolean, shouldReplaceUrl: boolean,
id: number, precreatedState: RouterState): Promise<boolean> {
if (id !== this.navigationId) {
this.location.go(this.urlSerializer.serialize(this.currentUrlTree));
@ -624,9 +673,15 @@ export class Router {
preActivation.traverse(this.outletMap);
});
const preactivation2$ = mergeMap.call(preactivation$, () => preActivation.checkGuards());
const preactivation2$ = mergeMap.call(preactivation$, () => {
if (this.navigationId !== id) return of (false);
return preActivation.checkGuards();
});
const resolveData$ = mergeMap.call(preactivation2$, (shouldActivate: boolean) => {
if (this.navigationId !== id) return of (false);
if (shouldActivate) {
return map.call(preActivation.resolveData(), () => shouldActivate);
} else {
@ -641,7 +696,6 @@ export class Router {
return;
}
this.lastNavigation = appliedUrl;
this.currentUrlTree = appliedUrl;
this.rawUrlTree = this.urlHandlingStrategy.merge(this.currentUrlTree, rawUrl);

3
modules/@angular/router/src/router_preloader.ts
View File

@ -83,7 +83,8 @@ export class RouterPreloader {
setUpPreloading(): void {
const navigations = filter.call(this.router.events, (e: any) => e instanceof NavigationEnd);
this.subscription = concatMap.call(navigations, () => this.preload()).subscribe((v: any) => {});
this.subscription =
concatMap.call(navigations, () => this.preload()).subscribe((v: any) => {});
}
preload(): Observable<any> { return this.processRoutes(this.injector, this.router.config); }