content/renderer/gpu/input_handler_manager_client.h

   1 // Copyright 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_MANAGER_CLIENT_H_
   6 #define CONTENT_RENDERER_GPU_INPUT_HANDLER_MANAGER_CLIENT_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback_forward.h"
  10 #include "content/common/content_export.h"
  11 #include "ui/gfx/vector2d_f.h"
  12
  13 namespace ui {
  14 struct LatencyInfo;
  15 }
  16
  17 namespace cc {
  18 class InputHandler;
  19 }
  20
  21 namespace WebKit {
  22 class WebInputEvent;
  23 }
  24
  25 namespace content {
  26
  27 class CONTENT_EXPORT InputHandlerManagerClient {
  28  public:
  29   virtual ~InputHandlerManagerClient() {}
  30
  31   // The Manager will supply a |handler| when bound to the client. This is valid
  32   // until the manager shuts down, at which point it supplies a null |handler|.
  33   // The client should only makes calls to |handler| on the compositor thread.
  34   typedef base::Callback<
  35       InputEventAckState(int /*routing_id*/,
  36                          const WebKit::WebInputEvent*,
  37                          const ui::LatencyInfo& latency_info)> Handler;
  38
  39   // Called from the main thread.
  40   virtual void SetBoundHandler(const Handler& handler) = 0;
  41
  42   // Called from the compositor thread.
  43   virtual void DidAddInputHandler(int routing_id,
  44                                   cc::InputHandler* input_handler) = 0;
  45   virtual void DidRemoveInputHandler(int routing_id) = 0;
  46   virtual void DidOverscroll(int routing_id,
  47                              gfx::Vector2dF accumulated_overscroll,
  48                              gfx::Vector2dF current_fling_velocity) = 0;
  49
  50  protected:
  51   InputHandlerManagerClient() {}
  52
  53  private:
  54   DISALLOW_COPY_AND_ASSIGN(InputHandlerManagerClient);
  55 };
  56
  57 }  // namespace content
  58
  59 #endif  // CONTENT_COMMON_GPU_INPUT_HANDLER_MANAGER_CLIENT_H_