| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| import {Component, Input, OnDestroy, OnInit} from '@angular/core'; |
| import {Subscription} from 'rxjs/Subscription'; |
| import {ActivatedRouteSnapshot, NavigationEnd, Router, RoutesRecognized} from '@angular/router'; |
| import {Title} from '@angular/platform-browser'; |
| import {TranslateService} from '@ngx-translate/core'; |
| import {Observable} from 'rxjs/Observable'; |
| |
| export interface BreadCrumb { |
| text: string; |
| path: string[]; |
| } |
| |
| @Component({ |
| selector: 'breadcrumbs', |
| templateUrl: './breadcrumbs.component.html', |
| styleUrls: ['./breadcrumbs.component.less'] |
| }) |
| export class BreadcrumbsComponent implements OnInit, OnDestroy { |
| |
| private subscriptions: Subscription[] = []; |
| |
| private crumbs: BreadCrumb[]; |
| |
| @Input() |
| addRootFirst: boolean = true; |
| |
| constructor( |
| private router: Router, |
| private titleService: Title, |
| private translateService: TranslateService |
| ) { } |
| |
| ngOnInit() { |
| this.subscriptions.push( |
| this.router.events.filter((event) => event instanceof NavigationEnd).subscribe(this.onNavigationEnd) |
| ); |
| this.onNavigationEnd(); |
| } |
| |
| ngOnDestroy() { |
| this.subscriptions.forEach((subscription: Subscription) => subscription.unsubscribe()); |
| } |
| |
| getCrumbsFromRouterStateSnapshot(routerStateSnapshot: ActivatedRouteSnapshot): BreadCrumb[] { |
| let level = routerStateSnapshot; |
| const path: string[] = []; |
| const breadcrumbs: BreadCrumb[] = []; |
| while (level) { |
| if (level.url.length) { |
| path.push( |
| (level.parent ? '' : '/') // start with trailing slash if this is the root |
| + level.url.reduce((url, segment) => url += ('/' + segment.path), '') // build up the url by its segments |
| ); |
| if (level.data.breadcrumbs) { |
| let crumbs = level.data.breadcrumbs; |
| if (!Array.isArray(crumbs)) { |
| crumbs = [crumbs]; |
| } |
| crumbs.forEach(breadcrumbTitle => breadcrumbs.push({ |
| text: breadcrumbTitle, |
| path: path |
| })); |
| } |
| } |
| level = level.firstChild; |
| } |
| return breadcrumbs; |
| } |
| |
| setPageTite(pageTitle) { |
| Observable.combineLatest( |
| this.translateService.get('common.title'), |
| pageTitle ? this.translateService.get(pageTitle) : Observable.of('') |
| ).first().subscribe(([commonTitle, pageTite]) => { |
| this.titleService.setTitle(pageTitle ? `${commonTitle} - ${pageTite}` : commonTitle); |
| }); |
| } |
| |
| onNavigationEnd = (): void => { |
| this.crumbs = this.getCrumbsFromRouterStateSnapshot(this.router.routerState.snapshot.root); |
| if (this.crumbs.length) { |
| this.setPageTite(this.crumbs[this.crumbs.length - 1].text); |
| } |
| } |
| |
| } |