refactor(core): move EventManager from core to platform/dom

Closes #5465

modules/angular2/src/platform/browser_common.ts

@@ -12,8 +12,7 @@ import {
   Renderer,
   reflector,
   APPLICATION_COMMON_PROVIDERS,
-  PLATFORM_COMMON_PROVIDERS,
-  EVENT_MANAGER_PLUGINS
+  PLATFORM_COMMON_PROVIDERS
 } from "angular2/core";
 import {COMMON_DIRECTIVES, COMMON_PIPES, FORM_PROVIDERS} from "angular2/common";
 import {Testability} from 'angular2/src/core/testability/testability';
@@ -30,6 +29,7 @@ import {AnimationBuilder} from "angular2/src/animate/animation_builder";
 import {BrowserDomAdapter} from './browser/browser_adapter';
 import {BrowserGetTestability} from 'angular2/src/platform/browser/testability';
 import {wtfInit} from 'angular2/src/core/profile/wtf_init';
+import {EventManager, EVENT_MANAGER_PLUGINS} from "angular2/src/platform/dom/events/event_manager";
 export {DOCUMENT} from 'angular2/src/platform/dom/dom_tokens';
 export {Title} from 'angular2/src/platform/browser/title';
 export {
@@ -71,7 +71,8 @@ export const BROWSER_APP_COMMON_PROVIDERS: Array<any /*Type | Provider | any[]*/
   DomSharedStylesHost,
   Testability,
   BrowserDetails,
-  AnimationBuilder
+  AnimationBuilder,
+  EventManager
 ]);
 
 export function initDomAdapter() {

modules/angular2/src/platform/dom/dom_renderer.ts

@@ -23,10 +23,11 @@ import {
   RenderViewWithFragments,
   RenderTemplateCmd,
   RenderEventDispatcher,
-  RenderComponentTemplate,
-  EventManager
+  RenderComponentTemplate
 } from 'angular2/core';
 
+import {EventManager} from './events/event_manager';
+
 import {DOCUMENT} from './dom_tokens';
 import {
   createRenderView,

modules/angular2/src/platform/dom/events/dom_events.ts

@@ -1,5 +1,6 @@
 import {DOM} from 'angular2/src/platform/dom/dom_adapter';
-import {Injectable, EventManagerPlugin, EventManager} from 'angular2/core';
+import {Injectable} from 'angular2/core';
+import {EventManagerPlugin, EventManager} from './event_manager';
 
 @Injectable()
 export class DomEventsPlugin extends EventManagerPlugin {

modules/angular2/src/platform/dom/events/event_manager.ts

@@ -0,0 +1,57 @@
+import {CONST_EXPR} from 'angular2/src/facade/lang';
+import {BaseException, WrappedException} from 'angular2/src/facade/exceptions';
+import {Injectable, Inject, OpaqueToken} from 'angular2/src/core/di';
+import {NgZone} from 'angular2/src/core/zone/ng_zone';
+import {ListWrapper} from 'angular2/src/facade/collection';
+
+export const EVENT_MANAGER_PLUGINS: OpaqueToken =
+    CONST_EXPR(new OpaqueToken("EventManagerPlugins"));
+
+@Injectable()
+export class EventManager {
+  private _plugins: EventManagerPlugin[];
+
+  constructor(@Inject(EVENT_MANAGER_PLUGINS) plugins: EventManagerPlugin[], private _zone: NgZone) {
+    plugins.forEach(p => p.manager = this);
+    this._plugins = ListWrapper.reversed(plugins);
+  }
+
+  addEventListener(element: HTMLElement, eventName: string, handler: Function) {
+    var plugin = this._findPluginFor(eventName);
+    plugin.addEventListener(element, eventName, handler);
+  }
+
+  addGlobalEventListener(target: string, eventName: string, handler: Function): Function {
+    var plugin = this._findPluginFor(eventName);
+    return plugin.addGlobalEventListener(target, eventName, handler);
+  }
+
+  getZone(): NgZone { return this._zone; }
+
+  /** @internal */
+  _findPluginFor(eventName: string): EventManagerPlugin {
+    var plugins = this._plugins;
+    for (var i = 0; i < plugins.length; i++) {
+      var plugin = plugins[i];
+      if (plugin.supports(eventName)) {
+        return plugin;
+      }
+    }
+    throw new BaseException(`No event manager plugin found for event ${eventName}`);
+  }
+}
+
+export class EventManagerPlugin {
+  manager: EventManager;
+
+  // That is equivalent to having supporting $event.target
+  supports(eventName: string): boolean { return false; }
+
+  addEventListener(element: HTMLElement, eventName: string, handler: Function) {
+    throw "not implemented";
+  }
+
+  addGlobalEventListener(element: string, eventName: string, handler: Function): Function {
+    throw "not implemented";
+  }
+}

modules/angular2/src/platform/dom/events/hammer_common.ts

@@ -1,4 +1,4 @@
-import {EventManagerPlugin} from 'angular2/core';
+import {EventManagerPlugin} from './event_manager';
 import {StringMapWrapper} from 'angular2/src/facade/collection';
 
 var _eventNames = {

modules/angular2/src/platform/dom/events/key_events.ts

@@ -7,7 +7,7 @@ import {
   NumberWrapper
 } from 'angular2/src/facade/lang';
 import {StringMapWrapper, ListWrapper} from 'angular2/src/facade/collection';
-import {EventManagerPlugin} from 'angular2/core';
+import {EventManagerPlugin} from './event_manager';
 import {NgZone} from 'angular2/src/core/zone/ng_zone';
 import {Injectable} from 'angular2/src/core/di';