@nebular/theme
Version:
@nebular/theme
30 lines • 1.24 kB
JavaScript
import { Injectable } from '@angular/core';
import { NavigationEnd, Router } from '@angular/router';
import { filter, pairwise, startWith, map } from 'rxjs/operators';
import { getPathPartOfUrl } from '../menu/url-matching-helpers';
/**
* This service determines whether we should scroll the layout back to top.
* This occurs when the page is changed, so when current url PATH is not equal to the previous one.
*
* TODO: this is most likely a temporary solutions as recently Angular introduces ViewportScroll
* and scroll restoration process
*/
export class NbRestoreScrollTopHelper {
constructor(router) {
this.router = router;
}
shouldRestore() {
return this.router.events
.pipe(startWith(null), filter(event => event === null || event instanceof NavigationEnd), pairwise(), map(([prev, current]) => this.pageChanged(prev, current)), filter(res => !!res));
}
pageChanged(prev, current) {
return !prev || getPathPartOfUrl(prev.url) !== getPathPartOfUrl(current.url);
}
}
NbRestoreScrollTopHelper.decorators = [
{ type: Injectable }
];
NbRestoreScrollTopHelper.ctorParameters = () => [
{ type: Router }
];
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