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307 lines (270 loc) 路 9.22 KB
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import { Location } from '@angular/common';
import { ComponentRef, NgZone } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';
import { RouterDirection } from '@ionic/core';
import { bindLifecycleEvents } from '../../providers/angular-delegate';
import { NavController } from '../../providers/nav-controller';
import { RouteView, StackEvent, computeStackId, destroyView, getUrl, insertView, isTabSwitch, toSegments } from './stack-utils';
export class StackController {
private views: RouteView[] = [];
private runningTask?: Promise<any>;
private skipTransition = false;
private tabsPrefix: string[] | undefined;
private activeView: RouteView | undefined;
private nextId = 0;
constructor(
tabsPrefix: string | undefined,
private containerEl: HTMLIonRouterOutletElement,
private router: Router,
private navCtrl: NavController,
private zone: NgZone,
private location: Location
) {
this.tabsPrefix = tabsPrefix !== undefined ? toSegments(tabsPrefix) : undefined;
}
createView(ref: ComponentRef<any>, activatedRoute: ActivatedRoute): RouteView {
const url = getUrl(this.router, activatedRoute);
const element = (ref && ref.location && ref.location.nativeElement) as HTMLElement;
const unlistenEvents = bindLifecycleEvents(this.zone, ref.instance, element);
return {
id: this.nextId++,
stackId: computeStackId(this.tabsPrefix, url),
unlistenEvents,
element,
ref,
url,
};
}
getExistingView(activatedRoute: ActivatedRoute): RouteView | undefined {
const activatedUrlKey = getUrl(this.router, activatedRoute);
const view = this.views.find(vw => vw.url === activatedUrlKey);
if (view) {
view.ref.changeDetectorRef.reattach();
}
return view;
}
setActive(enteringView: RouteView): Promise<StackEvent> {
let { direction, animation } = this.navCtrl.consumeTransition();
const leavingView = this.activeView;
const tabSwitch = isTabSwitch(enteringView, leavingView);
if (tabSwitch) {
direction = 'back';
animation = undefined;
}
const viewsSnapshot = this.views.slice();
let currentNavigation;
const router = (this.router as any);
// Angular >= 7.2.0
if (router.getCurrentNavigation) {
currentNavigation = router.getCurrentNavigation();
// Angular < 7.2.0
} else if (
router.navigations &&
router.navigations.value
) {
currentNavigation = router.navigations.value;
}
/**
* If the navigation action
* sets `replaceUrl: true`
* then we need to make sure
* we remove the last item
* from our views stack
*/
if (
currentNavigation &&
currentNavigation.extras &&
currentNavigation.extras.replaceUrl
) {
if (this.views.length > 0) {
this.views.splice(-1, 1);
}
}
const reused = this.views.includes(enteringView);
const views = this.insertView(enteringView, direction);
// Trigger change detection before transition starts
// This will call ngOnInit() the first time too, just after the view
// was attached to the dom, but BEFORE the transition starts
if (!reused) {
enteringView.ref.changeDetectorRef.detectChanges();
}
// Wait until previous transitions finish
return this.zone.runOutsideAngular(() => {
return this.wait(() => {
// disconnect leaving page from change detection to
// reduce jank during the page transition
if (leavingView) {
leavingView.ref.changeDetectorRef.detach();
}
// In case the enteringView is the same as the leavingPage we need to reattach()
enteringView.ref.changeDetectorRef.reattach();
return this.transition(enteringView, leavingView, animation, this.canGoBack(1), false)
.then(() => cleanupAsync(enteringView, views, viewsSnapshot, this.location))
.then(() => ({
enteringView,
direction,
animation,
tabSwitch
}));
});
});
}
canGoBack(deep: number, stackId = this.getActiveStackId()): boolean {
return this.getStack(stackId).length > deep;
}
pop(deep: number, stackId = this.getActiveStackId()) {
return this.zone.run(() => {
const views = this.getStack(stackId);
if (views.length <= deep) {
return Promise.resolve(false);
}
const view = views[views.length - deep - 1];
let url = view.url;
const viewSavedData = view.savedData;
if (viewSavedData) {
const primaryOutlet = viewSavedData.get('primary');
if (
primaryOutlet &&
primaryOutlet.route &&
primaryOutlet.route._routerState &&
primaryOutlet.route._routerState.snapshot &&
primaryOutlet.route._routerState.snapshot.url
) {
url = primaryOutlet.route._routerState.snapshot.url;
}
}
return this.navCtrl.navigateBack(url, view.savedExtras).then(() => true);
});
}
startBackTransition() {
const leavingView = this.activeView;
if (leavingView) {
const views = this.getStack(leavingView.stackId);
const enteringView = views[views.length - 2];
return this.wait(() => {
return this.transition(
enteringView, // entering view
leavingView, // leaving view
'back',
this.canGoBack(2),
true
);
});
}
return Promise.resolve();
}
endBackTransition(shouldComplete: boolean) {
if (shouldComplete) {
this.skipTransition = true;
this.pop(1);
} else if (this.activeView) {
cleanup(this.activeView, this.views, this.views, this.location);
}
}
getLastUrl(stackId?: string) {
const views = this.getStack(stackId);
return views.length > 0 ? views[views.length - 1] : undefined;
}
/**
* @internal
*/
getRootUrl(stackId?: string) {
const views = this.getStack(stackId);
return views.length > 0 ? views[0] : undefined;
}
getActiveStackId(): string | undefined {
return this.activeView ? this.activeView.stackId : undefined;
}
destroy() {
this.containerEl = undefined!;
this.views.forEach(destroyView);
this.activeView = undefined;
this.views = [];
}
private getStack(stackId: string | undefined) {
return this.views.filter(v => v.stackId === stackId);
}
private insertView(enteringView: RouteView, direction: RouterDirection) {
this.activeView = enteringView;
this.views = insertView(this.views, enteringView, direction);
return this.views.slice();
}
private transition(
enteringView: RouteView | undefined,
leavingView: RouteView | undefined,
direction: 'forward' | 'back' | undefined,
showGoBack: boolean,
progressAnimation: boolean
) {
if (this.skipTransition) {
this.skipTransition = false;
return Promise.resolve(false);
}
if (leavingView === enteringView) {
return Promise.resolve(false);
}
const enteringEl = enteringView ? enteringView.element : undefined;
const leavingEl = leavingView ? leavingView.element : undefined;
const containerEl = this.containerEl;
if (enteringEl && enteringEl !== leavingEl) {
enteringEl.classList.add('ion-page');
enteringEl.classList.add('ion-page-invisible');
if (enteringEl.parentElement !== containerEl) {
containerEl.appendChild(enteringEl);
}
if ((containerEl as any).commit) {
return containerEl.commit(enteringEl, leavingEl, {
deepWait: true,
duration: direction === undefined ? 0 : undefined,
direction,
showGoBack,
progressAnimation
});
}
}
return Promise.resolve(false);
}
private async wait<T>(task: () => Promise<T>): Promise<T> {
if (this.runningTask !== undefined) {
await this.runningTask;
this.runningTask = undefined;
}
const promise = this.runningTask = task();
return promise;
}
}
const cleanupAsync = (activeRoute: RouteView, views: RouteView[], viewsSnapshot: RouteView[], location: Location) => {
if (typeof (requestAnimationFrame as any) === 'function') {
return new Promise<any>(resolve => {
requestAnimationFrame(() => {
cleanup(activeRoute, views, viewsSnapshot, location);
resolve();
});
});
}
return Promise.resolve();
};
const cleanup = (activeRoute: RouteView, views: RouteView[], viewsSnapshot: RouteView[], location: Location) => {
viewsSnapshot
.filter(view => !views.includes(view))
.forEach(destroyView);
views.forEach(view => {
/**
* In the event that a user navigated multiple
* times in rapid succession, we want to make sure
* we don't pre-emptively detach a view while
* it is in mid-transition.
*
* In this instance we also do not care about query
* params or fragments as it will be the same view regardless
*/
const locationWithoutParams = location.path().split('?')[0];
const locationWithoutFragment = locationWithoutParams.split('#')[0];
if (view !== activeRoute && view.url !== locationWithoutFragment) {
const element = view.element;
element.setAttribute('aria-hidden', 'true');
element.classList.add('ion-page-hidden');
view.ref.changeDetectorRef.detach();
}
});
};