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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 
9 namespace aura {
10 
ScopedWindowTargeter(Window * window,scoped_ptr<ui::EventTargeter> new_targeter)11 ScopedWindowTargeter::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 
~ScopedWindowTargeter()19 ScopedWindowTargeter::~ScopedWindowTargeter() {
20   if (window_) {
21     window_->RemoveObserver(this);
22     window_->SetEventTargeter(old_targeter_.Pass());
23   }
24 }
25 
OnWindowDestroyed(Window * window)26 void ScopedWindowTargeter::OnWindowDestroyed(Window* window) {
27   CHECK_EQ(window_, window);
28   window_ = NULL;
29   old_targeter_.reset();
30 }
31 
32 }  // namespace aura
33