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1 // Copyright (c) 2013 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/views/widget/widget_deletion_observer.h"
6 
7 #include "ui/views/widget/widget.h"
8 
9 namespace views {
10 
WidgetDeletionObserver(Widget * widget)11 WidgetDeletionObserver::WidgetDeletionObserver(Widget* widget)
12     : widget_(widget) {
13   if (widget_)
14     widget_->AddObserver(this);
15 }
16 
~WidgetDeletionObserver()17 WidgetDeletionObserver::~WidgetDeletionObserver() {
18   CleanupWidget();
19 }
20 
OnWidgetDestroying(Widget * widget)21 void WidgetDeletionObserver::OnWidgetDestroying(Widget* widget) {
22   CleanupWidget();
23 }
24 
CleanupWidget()25 void WidgetDeletionObserver::CleanupWidget() {
26   if (widget_) {
27     widget_->RemoveObserver(this);
28     widget_ = NULL;
29   }
30 }
31 
32 }  // namespace views
33