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// 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 "components/mus/public/cpp/view_tracker.h"
namespace mus {
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 mus
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