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// Copyright (c) 2012 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() {
}
WindowTracker::WindowTracker(const WindowList& windows) {
// |windows| may contain dups, so call Add() instead of insert().
for (auto iter = windows.begin(); iter != windows.end(); iter++)
Add(*iter);
}
WindowTracker::~WindowTracker() {
while (has_windows())
Pop()->RemoveObserver(this);
}
void WindowTracker::Add(Window* window) {
if (Contains(window))
return;
window->AddObserver(this);
windows_.push_back(window);
}
void WindowTracker::Remove(Window* window) {
auto iter = std::find(windows_.begin(), windows_.end(), window);
if (iter != windows_.end()) {
windows_.erase(iter);
window->RemoveObserver(this);
}
}
bool WindowTracker::Contains(Window* window) {
return std::find(windows_.begin(), windows_.end(), window) != windows_.end();
}
aura::Window* WindowTracker::Pop() {
DCHECK(!windows_.empty());
aura::Window* window = *windows_.begin();
Remove(window);
return window;
}
void WindowTracker::OnWindowDestroying(Window* window) {
DCHECK(Contains(window));
Remove(window);
}
} // namespace aura
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