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1 // Copyright 2015 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 #ifndef SERVICES_UI_PUBLIC_CPP_SCOPED_WINDOW_PTR_H_ | |
6 #define SERVICES_UI_PUBLIC_CPP_SCOPED_WINDOW_PTR_H_ | |
7 | |
8 #include "base/macros.h" | |
9 #include "services/ui/public/cpp/window_observer.h" | |
10 | |
11 namespace ui { | |
12 | |
13 // Wraps a Window, taking overship of the Window. Also deals with Window being | |
14 // destroyed while ScopedWindowPtr still exists. | |
15 class ScopedWindowPtr : public WindowObserver { | |
16 public: | |
17 explicit ScopedWindowPtr(Window* window); | |
18 ~ScopedWindowPtr() override; | |
19 | |
20 // Destroys |window|. If |window| is a root of the WindowManager than the | |
21 // WindowManager is destroyed (which in turn destroys |window|). | |
22 // | |
23 // NOTE: this function (and class) are only useful for clients that only | |
24 // ever have a single root. | |
25 static void DeleteWindowOrWindowManager(Window* window); | |
26 | |
27 Window* window() { return window_; } | |
28 const Window* window() const { return window_; } | |
29 | |
30 private: | |
31 void DetachFromWindow(); | |
32 | |
33 void OnWindowDestroying(Window* window) override; | |
34 | |
35 Window* window_; | |
36 | |
37 DISALLOW_COPY_AND_ASSIGN(ScopedWindowPtr); | |
38 }; | |
39 | |
40 } // namespace ui | |
41 | |
42 #endif // SERVICES_UI_PUBLIC_CPP_SCOPED_WINDOW_PTR_H_ | |
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