111 lines
3.8 KiB
TypeScript
111 lines
3.8 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 {CommonModule, NgForOf} from '@angular/common';
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import {Component, EventEmitter, InjectFlags, Injectable, Input, IterableDiffers, NgModule, Output, createInjector, defineInjector, inject, ɵComponentDef as ComponentDef, ɵComponentType as ComponentType, ɵDirectiveDef as DirectiveDef, ɵDirectiveType as DirectiveType, ɵNgOnChangesFeature as NgOnChangesFeature, ɵdefaultIterableDiffers as defaultIterableDiffers, ɵdefineDirective as defineDirective, ɵinjectTemplateRef as injectTemplateRef, ɵinjectViewContainerRef as injectViewContainerRef, ɵmarkDirty as markDirty, ɵrenderComponent as renderComponent} from '@angular/core';
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export interface ToDo {
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text: string;
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done: boolean;
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}
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@Injectable({providedIn: 'root'})
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export class AppState {
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todos: ToDo[] = [
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{text: 'Demonstrate Components', done: false},
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{text: 'Demonstrate Structural Directives', done: true},
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{text: 'Demonstrate NgModules', done: false},
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{text: 'Demonstrate zoneless change detection', done: false},
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{text: 'Demonstrate internationalization', done: false},
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];
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static DEFAULT_TODO = {text: '', done: false};
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}
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@Component({
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selector: 'todo',
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// TODO(misko): `[class.done]` and `[value]` should be `todo.done` not `todo && todo.todo.done`
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// The reason for the guard is that template executes creation and binding together
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// but NgForOf expects creation and binding separate.
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template: `
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<div>
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<input type="checkbox" [value]="todo && todo.done" (click)="onCheckboxClick()">&ngsp;
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<span [class.done]="todo && todo.done">{{todo && todo.text}}</span>&ngsp;
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<button (click)="onArchiveClick()">archive</button>
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</div>
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`
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})
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export class TodoComponent {
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@Input()
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todo: ToDo = AppState.DEFAULT_TODO;
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@Output()
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archive = new EventEmitter();
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onCheckboxClick() { this.todo.done = !this.todo.done; }
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onArchiveClick() { this.archive.emit(this.todo); }
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}
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@Component({
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selector: 'todo-app',
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template: `
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<h1>ToDo Application</h1>
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<div>
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<todo *ngFor="let todo of appState.todos" [todo]="todo" (archive)="onArchive($event)"></todo>
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</div>
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<span>count: {{appState.todos.length}}.</span>
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`
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})
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export class ToDoAppComponent {
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public appState: AppState;
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constructor(/**appState: AppState*/) {
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// TODO(misko): Injection is broken because the compiler generates incorrect code.
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this.appState = new AppState();
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}
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onArchive(item: ToDo) {
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const todos = this.appState.todos;
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todos.splice(todos.indexOf(item));
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markDirty(this);
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}
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}
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// TODO(misko): This hack is here because common is not compiled with Ivy flag turned on.
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(CommonModule as any).ngInjectorDef = defineInjector({factory: () => new CommonModule});
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// TODO(misko): This hack is here because common is not compiled with Ivy flag turned on.
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(NgForOf as any).ngDirectiveDef = defineDirective({
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type: NgForOf,
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selectors: [['', 'ngFor', '', 'ngForOf', '']],
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factory: () => new NgForOf(
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injectViewContainerRef(), injectTemplateRef(),
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// TODO(misko): inject does not work since it needs to be directiveInject
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// inject(IterableDiffers, defaultIterableDiffers)
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defaultIterableDiffers),
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features: [NgOnChangesFeature({
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ngForOf: 'ngForOf',
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ngForTrackBy: 'ngForTrackBy',
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ngForTemplate: 'ngForTemplate',
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})],
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inputs: {
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ngForOf: 'ngForOf',
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ngForTrackBy: 'ngForTrackBy',
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ngForTemplate: 'ngForTemplate',
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}
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});
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@NgModule({declarations: [ToDoAppComponent, TodoComponent], imports: [CommonModule]})
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export class ToDoAppModule {
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}
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renderComponent(ToDoAppComponent, {
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// TODO(misko): This should run without injector.
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injector: createInjector(ToDoAppModule)
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}); |