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// 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 CONTENT_PORT_BROWSER_SMOOTH_SCROLL_GESTURE_H_
#define CONTENT_PORT_BROWSER_SMOOTH_SCROLL_GESTURE_H_
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
namespace content {
class RenderWidgetHost;
// This is a base class representing a single scroll gesture. These gestures are
// paired with the rendering benchmarking system to (automatically) measure how
// smoothnly chrome is responding to user input.
class SmoothScrollGesture : public base::RefCounted<SmoothScrollGesture> {
public:
// When called, the gesture should compute its state at the provided timestamp
// and send the right input events to the provided RenderWidgetHost to
// simulate the gesture having run up to that point in time.
//
// This function should return true until the gesture is over. A false return
// value will stop ticking the gesture and clean it up.
virtual bool ForwardInputEvents(base::TimeTicks now,
RenderWidgetHost* host) = 0;
protected:
friend class base::RefCounted<SmoothScrollGesture>;
virtual ~SmoothScrollGesture() {}
};
} // namespace content
#endif // CONTENT_PORT_BROWSER_SMOOTH_SCROLL_GESTURE_H_
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