187 lines
7.3 KiB
TypeScript
187 lines
7.3 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Component, Directive, DoCheck, ElementRef, EventEmitter, Inject, Injectable, Injector, Input, NgModule, OnChanges, OnDestroy, OnInit, Output, SimpleChanges} from '@angular/core';
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import {BrowserModule} from '@angular/platform-browser';
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import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
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import {UpgradeComponent, UpgradeModule, downgradeComponent, downgradeInjectable} from '@angular/upgrade/static';
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interface Hero {
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name: string;
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description: string;
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}
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// #docregion Angular Stuff
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// #docregion ng2-heroes
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// This Angular component will be "downgraded" to be used in AngularJS
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@Component({
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selector: 'ng2-heroes',
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// This template uses the upgraded `ng1-hero` component
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// Note that because its element is compiled by Angular we must use camelCased attribute names
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template: `<header><ng-content selector="h1"></ng-content></header>
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<ng-content selector=".extra"></ng-content>
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<div *ngFor="let hero of heroes">
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<ng1-hero [hero]="hero" (onRemove)="removeHero.emit(hero)"><strong>Super Hero</strong></ng1-hero>
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</div>
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<button (click)="addHero.emit()">Add Hero</button>`,
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})
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class Ng2HeroesComponent {
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@Input() heroes: Hero[];
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@Output() addHero = new EventEmitter();
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@Output() removeHero = new EventEmitter();
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}
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// #enddocregion
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// #docregion ng2-heroes-service
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// This Angular service will be "downgraded" to be used in AngularJS
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@Injectable()
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class HeroesService {
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heroes: Hero[] = [
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{name: 'superman', description: 'The man of steel'},
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{name: 'wonder woman', description: 'Princess of the Amazons'},
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{name: 'thor', description: 'The hammer-wielding god'}
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];
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// #docregion use-ng1-upgraded-service
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constructor(@Inject('titleCase') titleCase: (v: string) => string) {
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// Change all the hero names to title case, using the "upgraded" AngularJS service
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this.heroes.forEach((hero: Hero) => hero.name = titleCase(hero.name));
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}
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// #enddocregion
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addHero() {
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this.heroes =
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this.heroes.concat([{name: 'Kamala Khan', description: 'Epic shape-shifting healer'}]);
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}
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removeHero(hero: Hero) { this.heroes = this.heroes.filter((item: Hero) => item !== hero); }
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}
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// #enddocregion
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// #docregion ng1-hero-wrapper
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// This Angular directive will act as an interface to the "upgraded" AngularJS component
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@Directive({selector: 'ng1-hero'})
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class Ng1HeroComponentWrapper extends UpgradeComponent implements OnInit, OnChanges, DoCheck,
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OnDestroy {
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// The names of the input and output properties here must match the names of the
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// `<` and `&` bindings in the AngularJS component that is being wrapped
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@Input() hero: Hero;
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@Output() onRemove: EventEmitter<void>;
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constructor(@Inject(ElementRef) elementRef: ElementRef, @Inject(Injector) injector: Injector) {
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// We must pass the name of the directive as used by AngularJS to the super
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super('ng1Hero', elementRef, injector);
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}
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// For this class to work when compiled with AoT, we must implement these lifecycle hooks
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// because the AoT compiler will not realise that the super class implements them
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ngOnInit() { super.ngOnInit(); }
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ngOnChanges(changes: SimpleChanges) { super.ngOnChanges(changes); }
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ngDoCheck() { super.ngDoCheck(); }
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ngOnDestroy() { super.ngOnDestroy(); }
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}
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// #enddocregion
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// #docregion ng2-module
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// This NgModule represents the Angular pieces of the application
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@NgModule({
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declarations: [Ng2HeroesComponent, Ng1HeroComponentWrapper],
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providers: [
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HeroesService,
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// #docregion upgrade-ng1-service
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// Register an Angular provider whose value is the "upgraded" AngularJS service
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{provide: 'titleCase', useFactory: (i: any) => i.get('titleCase'), deps: ['$injector']}
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// #enddocregion
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],
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// All components that are to be "downgraded" must be declared as `entryComponents`
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entryComponents: [Ng2HeroesComponent],
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// We must import `UpgradeModule` to get access to the AngularJS core services
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imports: [BrowserModule, UpgradeModule]
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})
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class Ng2AppModule {
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ngDoBootstrap() { /* this is a placeholder to stop the boostrapper from complaining */
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}
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}
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// #enddocregion
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// #enddocregion
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// #docregion Angular 1 Stuff
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// #docregion ng1-module
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// This Angular 1 module represents the AngularJS pieces of the application
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declare var angular: ng.IAngularStatic;
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const ng1AppModule = angular.module('ng1AppModule', []);
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// #enddocregion
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// #docregion ng1-hero
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// This AngularJS component will be "upgraded" to be used in Angular
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ng1AppModule.component('ng1Hero', {
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bindings: {hero: '<', onRemove: '&'},
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transclude: true,
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template: `<div class="title" ng-transclude></div>
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<h2>{{ $ctrl.hero.name }}</h2>
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<p>{{ $ctrl.hero.description }}</p>
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<button ng-click="$ctrl.onRemove()">Remove</button>`
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});
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// #enddocregion
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// #docregion ng1-title-case-service
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// This AngularJS service will be "upgraded" to be used in Angular
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ng1AppModule.factory(
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'titleCase',
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() => (value: string) => value.replace(/((^|\s)[a-z])/g, (_, c) => c.toUpperCase()));
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// #enddocregion
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// #docregion downgrade-ng2-heroes-service
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// Register an AngularJS service, whose value is the "downgraded" Angular injectable.
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ng1AppModule.factory('heroesService', downgradeInjectable(HeroesService));
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// #enddocregion
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// #docregion ng2-heroes-wrapper
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// This is directive will act as the interface to the "downgraded" Angular component
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ng1AppModule.directive(
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'ng2Heroes',
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downgradeComponent(
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// The inputs and outputs here must match the relevant names of the properties on the
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// "downgraded" component
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{component: Ng2HeroesComponent, inputs: ['heroes'], outputs: ['addHero', 'removeHero']}));
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// #enddocregion
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// #docregion example-app
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// This is our top level application component
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ng1AppModule.component('exampleApp', {
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// We inject the "downgraded" HeroesService into this AngularJS component
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// (We don't need the `HeroesService` type for AngularJS DI - it just helps with TypeScript
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// compilation)
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controller: [
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'heroesService', function(heroesService: HeroesService) { this.heroesService = heroesService; }
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],
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// This template make use of the downgraded `ng2-heroes` component
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// Note that because its element is compiled by AngularJS we must use kebab-case attributes for
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// inputs and outputs
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template: `<link rel="stylesheet" href="./styles.css">
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<ng2-heroes [heroes]="$ctrl.heroesService.heroes" (add-hero)="$ctrl.heroesService.addHero()" (remove-hero)="$ctrl.heroesService.removeHero($event)">
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<h1>Heroes</h1>
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<p class="extra">There are {{ $ctrl.heroesService.heroes.length }} heroes.</p>
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</ng2-heroes>`
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});
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// #enddocregion
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// #enddocregion
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// #docregion bootstrap
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// First we bootstrap the Angular HybridModule
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// (We are using the dynamic browser platform as this example has not been compiled AoT)
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platformBrowserDynamic().bootstrapModule(Ng2AppModule).then(ref => {
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// Once Angular bootstrap is complete then we bootstrap the AngularJS module
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const upgrade = ref.injector.get(UpgradeModule) as UpgradeModule;
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upgrade.bootstrap(document.body, [ng1AppModule.name]);
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});
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// #enddocregion
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