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41 lines
852 B
C++
41 lines
852 B
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "view_manager/cpp/view_tracker.h"
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namespace mojo {
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ViewTracker::ViewTracker() {}
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ViewTracker::~ViewTracker() {
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for (Views::iterator i = views_.begin(); i != views_.end(); ++i)
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(*i)->RemoveObserver(this);
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}
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void ViewTracker::Add(View* view) {
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if (views_.count(view))
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return;
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view->AddObserver(this);
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views_.insert(view);
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}
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void ViewTracker::Remove(View* view) {
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if (views_.count(view)) {
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views_.erase(view);
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view->RemoveObserver(this);
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}
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}
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bool ViewTracker::Contains(View* view) {
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return views_.count(view) > 0;
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}
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void ViewTracker::OnViewDestroying(View* view) {
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DCHECK_GT(views_.count(view), 0u);
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Remove(view);
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}
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} // namespace mojo
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