chromium/ui/events/blink/fling_booster.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_EVENTS_BLINK_FLING_BOOSTER_H_
#define UI_EVENTS_BLINK_FLING_BOOSTER_H_

#include "base/time/time.h"
#include "third_party/blink/public/common/input/web_gesture_event.h"

namespace ui {

// This class is used to track fling state and provide "fling boosting".
// Boosting is a feature where successive flings can repeatedly increase the
// fling velocity so that users can scroll through long documents. This
// boosting logic occurs only in certain circumstances so we track the state
// and conditions in this class. The FlingController will request the velocity
// for all flings from this class; if FlingBooster decides the fling should be
// boosted it'll add the new fling's velocity to the previous one's.
class FlingBooster { … };

}  // namespace ui

#endif  // UI_EVENTS_BLINK_FLING_BOOSTER_H_