angular-docs-cn/modules/@angular/platform-browser/src/browser.ts

/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {CommonModule, PlatformLocation} from '@angular/common';
import {ApplicationModule, ClassProvider, ErrorHandler, ExistingProvider, FactoryProvider, NgModule, Optional, PLATFORM_INITIALIZER, PlatformRef, Provider, RootRenderer, Sanitizer, SkipSelf, Testability, TypeProvider, ValueProvider, createPlatformFactory, platformCore} from '@angular/core';

import {AnimationDriver} from '../src/dom/animation_driver';
import {WebAnimationsDriver} from '../src/dom/web_animations_driver';

import {BrowserDomAdapter} from './browser/browser_adapter';
import {BrowserPlatformLocation} from './browser/location/browser_platform_location';
import {BrowserGetTestability} from './browser/testability';
import {ELEMENT_PROBE_PROVIDERS} from './dom/debug/ng_probe';
import {getDOM} from './dom/dom_adapter';
import {DomRootRenderer, DomRootRenderer_} from './dom/dom_renderer';
import {DOCUMENT} from './dom/dom_tokens';
import {DomEventsPlugin} from './dom/events/dom_events';
import {EVENT_MANAGER_PLUGINS, EventManager} from './dom/events/event_manager';
import {HAMMER_GESTURE_CONFIG, HammerGestureConfig, HammerGesturesPlugin} from './dom/events/hammer_gestures';
import {KeyEventsPlugin} from './dom/events/key_events';
import {DomSharedStylesHost, SharedStylesHost} from './dom/shared_styles_host';
import {DomSanitizer, DomSanitizerImpl} from './security/dom_sanitization_service';

export const INTERNAL_BROWSER_PLATFORM_PROVIDERS: Provider[] = [
  {provide: PLATFORM_INITIALIZER, useValue: initDomAdapter, multi: true},
  {provide: PlatformLocation, useClass: BrowserPlatformLocation}
];

/**
 * @security Replacing built-in sanitization providers exposes the application to XSS risks.
 * Attacker-controlled data introduced by an unsanitized provider could expose your
 * application to XSS risks. For more detail, see the [Security Guide](http://g.co/ng/security).
 * @experimental
 */
export const BROWSER_SANITIZATION_PROVIDERS: Array<any> = [
  {provide: Sanitizer, useExisting: DomSanitizer},
  {provide: DomSanitizer, useClass: DomSanitizerImpl},
];

/**
 * @stable
 */
export const platformBrowser =
    createPlatformFactory(platformCore, 'browser', INTERNAL_BROWSER_PLATFORM_PROVIDERS);

export function initDomAdapter() {
  BrowserDomAdapter.makeCurrent();
  BrowserGetTestability.init();
}

export function errorHandler(): ErrorHandler {
  return new ErrorHandler();
}

export function _document(): any {
  return getDOM().defaultDoc();
}

export function _resolveDefaultAnimationDriver(): AnimationDriver {
  if (getDOM().supportsWebAnimation()) {
    return new WebAnimationsDriver();
  }
  return AnimationDriver.NOOP;
}

/**
 * The ng module for the browser.
 *
 * @stable
 */
@NgModule({
  providers: [
    BROWSER_SANITIZATION_PROVIDERS, {provide: ErrorHandler, useFactory: errorHandler, deps: []},
    {provide: DOCUMENT, useFactory: _document, deps: []},
    {provide: EVENT_MANAGER_PLUGINS, useClass: DomEventsPlugin, multi: true},
    {provide: EVENT_MANAGER_PLUGINS, useClass: KeyEventsPlugin, multi: true},
    {provide: EVENT_MANAGER_PLUGINS, useClass: HammerGesturesPlugin, multi: true},
    {provide: HAMMER_GESTURE_CONFIG, useClass: HammerGestureConfig},
    {provide: DomRootRenderer, useClass: DomRootRenderer_},
    {provide: RootRenderer, useExisting: DomRootRenderer},
    {provide: SharedStylesHost, useExisting: DomSharedStylesHost},
    {provide: AnimationDriver, useFactory: _resolveDefaultAnimationDriver}, DomSharedStylesHost,
    Testability, EventManager, ELEMENT_PROBE_PROVIDERS
  ],
  exports: [CommonModule, ApplicationModule]
})
export class BrowserModule {
  constructor(@Optional() @SkipSelf() parentModule: BrowserModule) {
    if (parentModule) {
      throw new Error(
          `BrowserModule has already been loaded. If you need access to common directives such as NgIf and NgFor from a lazy loaded module, import CommonModule instead.`);
    }
  }
}