64 lines
2.1 KiB
TypeScript
64 lines
2.1 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 {CompileReflector} from './compile_reflector';
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export enum LifecycleHooks {
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OnInit,
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OnDestroy,
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DoCheck,
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OnChanges,
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AfterContentInit,
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AfterContentChecked,
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AfterViewInit,
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AfterViewChecked
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}
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export const LIFECYCLE_HOOKS_VALUES = [
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LifecycleHooks.OnInit, LifecycleHooks.OnDestroy, LifecycleHooks.DoCheck, LifecycleHooks.OnChanges,
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LifecycleHooks.AfterContentInit, LifecycleHooks.AfterContentChecked, LifecycleHooks.AfterViewInit,
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LifecycleHooks.AfterViewChecked
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];
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export function hasLifecycleHook(
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reflector: CompileReflector, hook: LifecycleHooks, token: any): boolean {
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return reflector.hasLifecycleHook(token, getHookName(hook));
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}
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export function getAllLifecycleHooks(reflector: CompileReflector, token: any): LifecycleHooks[] {
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return LIFECYCLE_HOOKS_VALUES.filter(hook => hasLifecycleHook(reflector, hook, token));
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}
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function getHookName(hook: LifecycleHooks): string {
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switch (hook) {
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case LifecycleHooks.OnInit:
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return 'ngOnInit';
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case LifecycleHooks.OnDestroy:
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return 'ngOnDestroy';
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case LifecycleHooks.DoCheck:
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return 'ngDoCheck';
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case LifecycleHooks.OnChanges:
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return 'ngOnChanges';
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case LifecycleHooks.AfterContentInit:
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return 'ngAfterContentInit';
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case LifecycleHooks.AfterContentChecked:
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return 'ngAfterContentChecked';
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case LifecycleHooks.AfterViewInit:
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return 'ngAfterViewInit';
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case LifecycleHooks.AfterViewChecked:
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return 'ngAfterViewChecked';
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default:
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// This default case is not needed by TypeScript compiler, as the switch is exhaustive.
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// However Closure Compiler does not understand that and reports an error in typed mode.
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// The `throw new Error` below works around the problem, and the unexpected: never variable
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// makes sure tsc still checks this code is unreachable.
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const unexpected: never = hook;
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throw new Error(`unexpected ${unexpected}`);
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}
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}
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