| // Copyright 2014 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 "view_manager/public/cpp/view_tracker.h" |
| |
| namespace mojo { |
| |
| ViewTracker::ViewTracker() { |
| } |
| |
| ViewTracker::~ViewTracker() { |
| for (Views::iterator i = views_.begin(); i != views_.end(); ++i) |
| (*i)->RemoveObserver(this); |
| } |
| |
| void ViewTracker::Add(View* view) { |
| if (views_.count(view)) |
| return; |
| |
| view->AddObserver(this); |
| views_.insert(view); |
| } |
| |
| void ViewTracker::Remove(View* view) { |
| if (views_.count(view)) { |
| views_.erase(view); |
| view->RemoveObserver(this); |
| } |
| } |
| |
| bool ViewTracker::Contains(View* view) { |
| return views_.count(view) > 0; |
| } |
| |
| void ViewTracker::OnViewDestroying(View* view) { |
| DCHECK_GT(views_.count(view), 0u); |
| Remove(view); |
| } |
| |
| } // namespace mojo |