feat(core): Support multiple ChangeDetectors in a single LifeCycle.

This allows a single LifeCycle to be shared among multiple root components, since each root component has its own ChangeDetector configured.

Author: alxhub

modules/angular2/src/core/life_cycle/life_cycle.ts

@@ -35,13 +35,15 @@ import {wtfLeave, wtfCreateScope, WtfScopeFn} from '../profile/profile';
 export class LifeCycle {
  static _tickScope: WtfScopeFn = wtfCreateScope('LifeCycle#tick()');
 
- _changeDetector: ChangeDetector;
+ _changeDetectors: ChangeDetector[];
  _enforceNoNewChanges: boolean;
  _runningTick: boolean = false;
 
  constructor(changeDetector: ChangeDetector = null, enforceNoNewChanges: boolean = false) {
- this._changeDetector =
- changeDetector; // may be null when instantiated from application bootstrap
+ this._changeDetectors = [];
+ if (isPresent(changeDetector)) {
+ this._changeDetectors.push(changeDetector);
+ }
  this._enforceNoNewChanges = enforceNoNewChanges;
  }
 
@@ -50,7 +52,7 @@ export class LifeCycle {
  */
  registerWith(zone: NgZone, changeDetector: ChangeDetector = null) {
  if (isPresent(changeDetector)) {
- this._changeDetector = changeDetector;
+ this._changeDetectors.push(changeDetector);
  }
  zone.overrideOnTurnDone(() => this.tick());
  }
@@ -78,9 +80,9 @@ export class LifeCycle {
  var s = LifeCycle._tickScope();
  try {
  this._runningTick = true;
- this._changeDetector.detectChanges();
+ this._changeDetectors.forEach((detector) => detector.detectChanges());
  if (this._enforceNoNewChanges) {
- this._changeDetector.checkNoChanges();
+ this._changeDetectors.forEach((detector) => detector.checkNoChanges());
  }
  } finally {
  this._runningTick = false;