content/renderer/input/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_INPUT_INPUT_HANDLER_MANAGER_CLIENT_H_
   6 #define CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_CLIENT_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback.h"
  10 #include "base/callback_forward.h"
  11 #include "content/common/content_export.h"
  12 #include "ui/gfx/geometry/vector2d_f.h"
  13
  14 namespace ui {
  15 struct LatencyInfo;
  16 }
  17
  18 namespace cc {
  19 class InputHandler;
  20 }
  21
  22 namespace blink {
  23 class WebInputEvent;
  24 }
  25
  26 namespace content {
  27 struct DidOverscrollParams;
  28
  29 class CONTENT_EXPORT InputHandlerManagerClient {
  30  public:
  31   virtual ~InputHandlerManagerClient() {}
  32
  33   // The Manager will supply a |handler| when bound to the client. This is valid
  34   // until the manager shuts down, at which point it supplies a null |handler|.
  35   // The client should only makes calls to |handler| on the compositor thread.
  36   typedef base::Callback<
  37       InputEventAckState(int /*routing_id*/,
  38                          const blink::WebInputEvent*,
  39                          ui::LatencyInfo* latency_info)> Handler;
  40
  41   // Called from the main thread.
  42   virtual void SetBoundHandler(const Handler& handler) = 0;
  43
  44   // Called from the compositor thread.
  45   virtual void DidAddInputHandler(int routing_id,
  46                                   cc::InputHandler* input_handler) = 0;
  47   virtual void DidRemoveInputHandler(int routing_id) = 0;
  48   virtual void DidOverscroll(int routing_id,
  49                              const DidOverscrollParams& params) = 0;
  50   virtual void DidStopFlinging(int routing_id) = 0;
  51
  52  protected:
  53   InputHandlerManagerClient() {}
  54
  55  private:
  56   DISALLOW_COPY_AND_ASSIGN(InputHandlerManagerClient);
  57 };
  58
  59 }  // namespace content
  60
  61 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_CLIENT_H_