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// 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 ASH_KEYBOARD_UMA_EVENT_FILTER_H_
#define ASH_KEYBOARD_UMA_EVENT_FILTER_H_
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/time/time.h"
#include "ui/events/event_handler.h"
namespace ash {
// EventFilter for tracking keyboard-related metrics, which intercepts events
// before they are processed by the usual path and logs metrics about the
// events.
class KeyboardUMAEventFilter : public ui::EventHandler {
public:
KeyboardUMAEventFilter();
~KeyboardUMAEventFilter() override;
// ui::EventHandler overrides:
void OnKeyEvent(ui::KeyEvent* event) override;
private:
// The timestamp of the last character keystroke.
base::TimeDelta last_keystroke_time_;
DISALLOW_COPY_AND_ASSIGN(KeyboardUMAEventFilter);
};
} // namespace ash
#endif // ASH_KEYBOARD_UMA_EVENT_FILTER_H_
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