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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_RENDERER_GPU_INPUT_HANDLER_PROXY_CLIENT_H_
      6 #define CONTENT_RENDERER_GPU_INPUT_HANDLER_PROXY_CLIENT_H_
      7 
      8 namespace WebKit {
      9 class WebGestureCurve;
     10 struct WebActiveWheelFlingParameters;
     11 struct WebFloatPoint;
     12 struct WebSize;
     13 }
     14 
     15 namespace content {
     16 
     17 // All callbacks invoked from the compositor thread.
     18 class InputHandlerProxyClient {
     19  public:
     20   // Called just before the InputHandlerProxy shuts down.
     21   virtual void WillShutdown() = 0;
     22 
     23   // Transfers an active wheel fling animation initiated by a previously
     24   // handled input event out to the client.
     25   virtual void TransferActiveWheelFlingAnimation(
     26       const WebKit::WebActiveWheelFlingParameters& params) = 0;
     27 
     28   // Creates a new fling animation curve instance for device |device_source|
     29   // with |velocity| and already scrolled |cumulative_scroll| pixels.
     30   virtual WebKit::WebGestureCurve* CreateFlingAnimationCurve(
     31       int device_source,
     32       const WebKit::WebFloatPoint& velocity,
     33       const WebKit::WebSize& cumulative_scroll) = 0;
     34 
     35   virtual void DidOverscroll(const cc::DidOverscrollParams& params) = 0;
     36 
     37  protected:
     38   virtual ~InputHandlerProxyClient() {}
     39 };
     40 
     41 }  // namespace content
     42 
     43 #endif  // CONTENT_RENDERER_GPU_INPUT_HANDLER_PROXY_CLIENT_H_
     44