| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/engagement/site_engagement_observer.h" |
| |
| #include "chrome/browser/engagement/site_engagement_service.h" |
| |
| SiteEngagementObserver::SiteEngagementObserver(SiteEngagementService* service) |
| : service_(nullptr) { |
| Observe(service); |
| } |
| |
| SiteEngagementObserver::SiteEngagementObserver() : service_(nullptr) {} |
| |
| SiteEngagementObserver::~SiteEngagementObserver() { |
| if (service_) |
| service_->RemoveObserver(this); |
| } |
| |
| SiteEngagementService* SiteEngagementObserver::GetSiteEngagementService() |
| const { |
| return service_; |
| } |
| |
| void SiteEngagementObserver::Observe(SiteEngagementService* service) { |
| if (service == service_) |
| return; |
| |
| if (service_) |
| service_->RemoveObserver(this); |
| |
| service_ = service; |
| if (service_) |
| service->AddObserver(this); |
| } |