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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ | 5 #ifndef UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ |
6 #define UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ | 6 #define UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/observer_list.h" | 9 #include "base/observer_list.h" |
10 #include "ui/base/ui_export.h" | 10 #include "ui/base/ui_base_export.h" |
11 #include "ui/base/x/x11_util.h" | 11 #include "ui/base/x/x11_util.h" |
12 | 12 |
13 template <typename T> struct DefaultSingletonTraits; | 13 template <typename T> struct DefaultSingletonTraits; |
14 | 14 |
15 namespace ui { | 15 namespace ui { |
16 | 16 |
17 class ActiveWindowWatcherXObserver; | 17 class ActiveWindowWatcherXObserver; |
18 | 18 |
19 namespace internal { | 19 namespace internal { |
20 class RootWindowPropertyWatcherX; | 20 class RootWindowPropertyWatcherX; |
21 } | 21 } |
22 | 22 |
23 // This is a helper class that is used to keep track of which window the X | 23 // This is a helper class that is used to keep track of which window the X |
24 // window manager thinks is active. Add an Observer to listen for changes to | 24 // window manager thinks is active. Add an Observer to listen for changes to |
25 // the active window. | 25 // the active window. |
26 class UI_EXPORT ActiveWindowWatcherX { | 26 class UI_BASE_EXPORT ActiveWindowWatcherX { |
27 public: | 27 public: |
28 static ActiveWindowWatcherX* GetInstance(); | 28 static ActiveWindowWatcherX* GetInstance(); |
29 static void AddObserver(ActiveWindowWatcherXObserver* observer); | 29 static void AddObserver(ActiveWindowWatcherXObserver* observer); |
30 static void RemoveObserver(ActiveWindowWatcherXObserver* observer); | 30 static void RemoveObserver(ActiveWindowWatcherXObserver* observer); |
31 | 31 |
32 // Checks if the WM supports the active window property. Note that the return | 32 // Checks if the WM supports the active window property. Note that the return |
33 // value can change, especially during system startup. | 33 // value can change, especially during system startup. |
34 static bool WMSupportsActivation(); | 34 static bool WMSupportsActivation(); |
35 | 35 |
36 private: | 36 private: |
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51 void NotifyActiveWindowChanged(); | 51 void NotifyActiveWindowChanged(); |
52 | 52 |
53 ObserverList<ActiveWindowWatcherXObserver> observers_; | 53 ObserverList<ActiveWindowWatcherXObserver> observers_; |
54 | 54 |
55 DISALLOW_COPY_AND_ASSIGN(ActiveWindowWatcherX); | 55 DISALLOW_COPY_AND_ASSIGN(ActiveWindowWatcherX); |
56 }; | 56 }; |
57 | 57 |
58 } // namespace ui | 58 } // namespace ui |
59 | 59 |
60 #endif // UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ | 60 #endif // UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_ |
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