| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_CHROMEOS_EVENTS_SYSTEM_KEY_EVENT_LISTENER_H_ |
| #define CHROME_BROWSER_CHROMEOS_EVENTS_SYSTEM_KEY_EVENT_LISTENER_H_ |
| |
| #include "base/memory/singleton.h" |
| #include "ui/events/platform/platform_event_observer.h" |
| |
| typedef union _XEvent XEvent; |
| |
| namespace chromeos { |
| |
| class SystemKeyEventListener : public ui::PlatformEventObserver { |
| public: |
| static void Initialize(); |
| static void Shutdown(); |
| // GetInstance returns NULL if not initialized or if already shutdown. |
| static SystemKeyEventListener* GetInstance(); |
| |
| void Stop(); |
| |
| private: |
| // Defines the delete on exit Singleton traits we like. Best to have this |
| // and const/dest private as recommended for Singletons. |
| friend struct DefaultSingletonTraits<SystemKeyEventListener>; |
| friend class SystemKeyEventListenerTest; |
| |
| SystemKeyEventListener(); |
| virtual ~SystemKeyEventListener(); |
| |
| // ui::PlatformEventObserver: |
| virtual void WillProcessEvent(const ui::PlatformEvent& event) override; |
| virtual void DidProcessEvent(const ui::PlatformEvent& event) override; |
| |
| void ProcessedXEvent(XEvent* xevent); |
| |
| bool stopped_; |
| |
| // Base X ID for events from the XKB extension. |
| int xkb_event_base_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SystemKeyEventListener); |
| }; |
| |
| } // namespace chromeos |
| |
| #endif // CHROME_BROWSER_CHROMEOS_EVENTS_SYSTEM_KEY_EVENT_LISTENER_H_ |