feat(core): extract platforms out of core

Currently, core depends on the browser, which means that other platforms (e.g., NativeScript or webworker) cannot use the bootstrapping logic core provides.
This PR extract makes bootstrapping logic in core completely platform-independent. The browser-specific code was moved to "angular2/platforms/browser".

BREAKING CHANGE

A few private helpers (e.g., platformCommon or applicationCommon) were removed or replaced with other helpers. Look at PLATFORM_COMMON_PROVIDERS, APPLICATION_COMMON_PROVIDERS, BROWSER_PROVIDERS, BROWSER_APP_PROVIDERS to see if they export the providers you need.

Closes #5219

Closes #5280

modules/angular2/src/platform/browser/xhr_impl.dart

@@ -0,0 +1,14 @@
+library angular2.src.services.xhr_impl;
+
+import 'dart:async' show Future;
+import 'dart:html' show HttpRequest;
+import 'package:angular2/core.dart';
+import 'package:angular2/compiler.dart' show XHR;
+
+@Injectable()
+class XHRImpl extends XHR {
+  Future<String> get(String url) {
+    return HttpRequest.request(url).then((HttpRequest req) => req.responseText,
+        onError: (_) => new Future.error('Failed to load $url'));
+  }
+}

modules/angular2/src/platform/browser/xhr_impl.ts

@@ -0,0 +1,39 @@
+import {Promise, PromiseWrapper, PromiseCompleter} from 'angular2/src/facade/promise';
+import {isPresent} from 'angular2/src/facade/lang';
+import {XHR} from 'angular2/src/compiler/xhr';
+
+export class XHRImpl extends XHR {
+  get(url: string): Promise<string> {
+    var completer: PromiseCompleter < string >= PromiseWrapper.completer();
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', url, true);
+    xhr.responseType = 'text';
+
+    xhr.onload = function() {
+      // responseText is the old-school way of retrieving response (supported by IE8 & 9)
+      // response/responseType properties were introduced in XHR Level2 spec (supported by IE10)
+      var response = isPresent(xhr.response) ? xhr.response : xhr.responseText;
+
+      // normalize IE9 bug (http://bugs.jquery.com/ticket/1450)
+      var status = xhr.status === 1223 ? 204 : xhr.status;
+
+      // fix status code when it is 0 (0 status is undocumented).
+      // Occurs when accessing file resources or on Android 4.1 stock browser
+      // while retrieving files from application cache.
+      if (status === 0) {
+        status = response ? 200 : 0;
+      }
+
+      if (200 <= status && status <= 300) {
+        completer.resolve(response);
+      } else {
+        completer.reject(`Failed to load ${url}`, null);
+      }
+    };
+
+    xhr.onerror = function() { completer.reject(`Failed to load ${url}`, null); };
+
+    xhr.send();
+    return completer.promise;
+  }
+}

modules/angular2/src/platform/browser_common.ts

@@ -0,0 +1,75 @@
+import {CONST_EXPR} from 'angular2/src/facade/lang';
+import {provide, Provider, Injector, OpaqueToken} from 'angular2/src/core/di';
+
+import {XHR} from 'angular2/compiler';
+import {
+  PLATFORM_DIRECTIVES,
+  PLATFORM_PIPES,
+  ComponentRef,
+  platform,
+  ExceptionHandler,
+  Reflector,
+  reflector,
+  APPLICATION_COMMON_PROVIDERS,
+  PLATFORM_COMMON_PROVIDERS
+} from "angular2/core";
+import {COMMON_DIRECTIVES, COMMON_PIPES, FORM_PROVIDERS} from "angular2/common";
+import {Renderer} from 'angular2/render';
+import {XHRImpl} from "angular2/src/platform/browser/xhr_impl";
+import {Testability} from 'angular2/src/core/testability/testability';
+
+// TODO change these imports once dom_adapter is moved out of core
+import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {
+  DomEventsPlugin,
+  EVENT_MANAGER_PLUGINS
+} from 'angular2/src/core/render/dom/events/event_manager';
+import {KeyEventsPlugin} from 'angular2/src/core/render/dom/events/key_events';
+import {HammerGesturesPlugin} from 'angular2/src/core/render/dom/events/hammer_gestures';
+import {DOCUMENT} from 'angular2/src/core/render/dom/dom_tokens';
+import {DomRenderer, DomRenderer_} from 'angular2/src/core/render/dom/dom_renderer';
+import {DomSharedStylesHost} from 'angular2/src/core/render/dom/shared_styles_host';
+import {SharedStylesHost} from "angular2/src/core/render/dom/shared_styles_host";
+import {BrowserDetails} from "angular2/src/animate/browser_details";
+import {AnimationBuilder} from "angular2/src/animate/animation_builder";
+import {BrowserDomAdapter} from 'angular2/src/core/dom/browser_adapter';
+import {BrowserGetTestability} from 'angular2/src/core/testability/browser_testability';
+import {wtfInit} from 'angular2/src/core/profile/wtf_init';
+
+export const BROWSER_PROVIDERS: Array<any /*Type | Provider | any[]*/> =
+    CONST_EXPR([PLATFORM_COMMON_PROVIDERS]);
+
+function _exceptionHandler(): ExceptionHandler {
+  return new ExceptionHandler(DOM, false);
+}
+
+function _document(): any {
+  return DOM.defaultDoc();
+}
+
+export const BROWSER_APP_COMMON_PROVIDERS: Array<any /*Type | Provider | any[]*/> = CONST_EXPR([
+  APPLICATION_COMMON_PROVIDERS,
+  FORM_PROVIDERS,
+  new Provider(PLATFORM_PIPES, {useValue: COMMON_PIPES, multi: true}),
+  new Provider(PLATFORM_DIRECTIVES, {useValue: COMMON_DIRECTIVES, multi: true}),
+  new Provider(ExceptionHandler, {useFactory: _exceptionHandler, deps: []}),
+  new Provider(DOCUMENT, {useFactory: _document, deps: []}),
+  new Provider(EVENT_MANAGER_PLUGINS, {useClass: DomEventsPlugin, multi: true}),
+  new Provider(EVENT_MANAGER_PLUGINS, {useClass: KeyEventsPlugin, multi: true}),
+  new Provider(EVENT_MANAGER_PLUGINS, {useClass: HammerGesturesPlugin, multi: true}),
+  new Provider(DomRenderer, {useClass: DomRenderer_}),
+  new Provider(Renderer, {useExisting: DomRenderer}),
+  new Provider(SharedStylesHost, {useExisting: DomSharedStylesHost}),
+  new Provider(XHR, {useClass: XHRImpl}),
+  DomSharedStylesHost,
+  Testability,
+  BrowserDetails,
+  AnimationBuilder
+]);
+
+export function initDomAdapter() {
+  // TODO: refactor into a generic init function
+  BrowserDomAdapter.makeCurrent();
+  wtfInit();
+  BrowserGetTestability.init();
+}