1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ui/aura/scoped_window_targeter.h"
6
7#include "ui/aura/window.h"
8
9namespace aura {
10
11ScopedWindowTargeter::ScopedWindowTargeter(
12    Window* window,
13    scoped_ptr<ui::EventTargeter> new_targeter)
14    : window_(window),
15      old_targeter_(window->SetEventTargeter(new_targeter.Pass())) {
16  window_->AddObserver(this);
17}
18
19ScopedWindowTargeter::~ScopedWindowTargeter() {
20  if (window_) {
21    window_->RemoveObserver(this);
22    window_->SetEventTargeter(old_targeter_.Pass());
23  }
24}
25
26void ScopedWindowTargeter::OnWindowDestroyed(Window* window) {
27  CHECK_EQ(window_, window);
28  window_ = NULL;
29  old_targeter_.reset();
30}
31
32}  // namespace aura
33