| // Copyright 2013 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 COBALT_MEDIA_BASE_KEYBOARD_EVENT_COUNTER_H_ |
| #define COBALT_MEDIA_BASE_KEYBOARD_EVENT_COUNTER_H_ |
| |
| #include <set> |
| |
| #include "base/basictypes.h" |
| #include "base/synchronization/lock.h" |
| #include "cobalt/media/base/media_export.h" |
| #include "starboard/types.h" |
| #include "ui/events/event_constants.h" |
| #include "ui/events/keycodes/keyboard_codes.h" |
| |
| namespace cobalt { |
| namespace media { |
| |
| // This class tracks the total number of keypresses based on the OnKeyboardEvent |
| // calls it receives from the client. |
| // Multiple key down events for the same key are counted as one keypress until |
| // the same key is released. |
| class MEDIA_EXPORT KeyboardEventCounter { |
| public: |
| KeyboardEventCounter(); |
| ~KeyboardEventCounter(); |
| |
| // Resets the count to 0. Must be called on the same thread as |
| // OnKeyboardEvent. |
| void Reset(); |
| |
| // Returns the total number of keypresses since its creation or last Reset() |
| // call. Can be called on any thread. |
| size_t GetKeyPressCount() const; |
| |
| // The client should call this method on key down or key up events. |
| // Must be called on a single thread. |
| void OnKeyboardEvent(ui::EventType event, ui::KeyboardCode key_code); |
| |
| private: |
| // The set of keys currently held down. |
| std::set<ui::KeyboardCode> pressed_keys_; |
| |
| size_t total_key_presses_; |
| |
| DISALLOW_COPY_AND_ASSIGN(KeyboardEventCounter); |
| }; |
| |
| } // namespace media |
| } // namespace cobalt |
| |
| #endif // COBALT_MEDIA_BASE_KEYBOARD_EVENT_COUNTER_H_ |