text: // 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 CONTENT_RENDERER_INPUT_INPUT_HANDLER_WRAPPER_H_
  #define CONTENT_RENDERER_INPUT_INPUT_HANDLER_WRAPPER_H_
  
  #include "base/macros.h"
  #include "base/memory/weak_ptr.h"
  #include "base/single_thread_task_runner.h"
  #include "content/renderer/input/input_handler_manager.h"
  #include "ui/events/blink/input_handler_proxy.h"
  #include "ui/events/blink/input_handler_proxy_client.h"
  
  namespace ui {
  class InputHandlerProxy;
  class InputHandlerProxyClient;
  }
  
  namespace content {
  
  // This class lives on the compositor thread.
  class InputHandlerWrapper : public ui::InputHandlerProxyClient {
   public:
    InputHandlerWrapper(
        InputHandlerManager* input_handler_manager,
        int routing_id,
        const scoped_refptr<base::SingleThreadTaskRunner>& main_task_runner,
        const base::WeakPtr<cc::InputHandler>& input_handler,
        const base::WeakPtr<RenderViewImpl>& render_view_impl,
        bool enable_smooth_scrolling,
        bool enable_wheel_gestures);
    ~InputHandlerWrapper() override;
  
    int routing_id() const { return routing_id_; }
    ui::InputHandlerProxy* input_handler_proxy() {
      return &input_handler_proxy_;
    }
  
    // InputHandlerProxyClient implementation.
    void WillShutdown() override;
    void TransferActiveWheelFlingAnimation(
        const blink::WebActiveWheelFlingParameters& params) override;
    blink::WebGestureCurve* CreateFlingAnimationCurve(
        blink::WebGestureDevice deviceSource,
        const blink::WebFloatPoint& velocity,
        const blink::WebSize& cumulativeScroll) override;
    void DidOverscroll(
          const gfx::Vector2dF& accumulated_overscroll,
          const gfx::Vector2dF& latest_overscroll_delta,
          const gfx::Vector2dF& current_fling_velocity,
          const gfx::PointF& causal_event_viewport_point) override;
    void DidStartFlinging() override;
    void DidStopFlinging() override;
    void DidAnimateForInput() override;
  
   private:
    InputHandlerManager* input_handler_manager_;
    int routing_id_;
    ui::InputHandlerProxy input_handler_proxy_;
    scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
  
    // Can only be accessed on the main thread.
    base::WeakPtr<RenderViewImpl> render_view_impl_;
  
    DISALLOW_COPY_AND_ASSIGN(InputHandlerWrapper);
  };
  
  }  // namespace content
  
  #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_WRAPPER_H_
  