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// Copyright 2019 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 "ui/aura/window_tracker.h"
#include "ui/aura/window.h"
namespace aura {
WindowTracker::WindowTracker(const WindowList& windows) {
for (Window* window : windows)
Add(window);
}
WindowTracker::WindowTracker() = default;
WindowTracker::~WindowTracker() {
RemoveAll();
}
void WindowTracker::Add(Window* window) {
if (base::Contains(windows_, window))
return;
window->AddObserver(this);
windows_.push_back(window);
}
void WindowTracker::RemoveAll() {
for (Window* window : windows_)
window->RemoveObserver(this);
windows_.clear();
}
void WindowTracker::Remove(Window* window) {
auto iter = std::find(windows_.begin(), windows_.end(), window);
if (iter != windows_.end()) {
window->RemoveObserver(this);
windows_.erase(iter);
}
}
Window* WindowTracker::Pop() {
DCHECK(!windows_.empty());
Window* result = windows_[0];
Remove(result);
return result;
}
bool WindowTracker::Contains(Window* window) const {
return base::Contains(windows_, window);
}
void WindowTracker::OnWindowDestroying(Window* window) {
DCHECK(Contains(window));
Remove(window);
}
} // namespace aura
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