input_ack_handler.h revision 4e180b6a0b4720a9b8e9e959a882386f690f08ff 
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_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
6#define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
7
8#include "base/basictypes.h"
9#include "content/port/browser/event_with_latency_info.h"
10#include "content/port/common/input_event_ack_state.h"
11#include "content/public/browser/native_web_keyboard_event.h"
12#include "third_party/WebKit/public/web/WebInputEvent.h"
13
14namespace content {
15
16// Provided customized ack response for input events.
17class CONTENT_EXPORT InputAckHandler {
18 public:
19  virtual ~InputAckHandler() {}
20
21  // Called upon event ack receipt from the renderer.
22  virtual void OnKeyboardEventAck(const NativeWebKeyboardEvent& event,
23                                  InputEventAckState ack_result) = 0;
24  virtual void OnWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
25                               InputEventAckState ack_result) = 0;
26  virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
27                               InputEventAckState ack_result) = 0;
28  virtual void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
29                                 InputEventAckState ack_result) = 0;
30
31  enum UnexpectedEventAckType {
32    UNEXPECTED_ACK,
33    UNEXPECTED_EVENT_TYPE,
34    BAD_ACK_MESSAGE
35  };
36  virtual void OnUnexpectedEventAck(UnexpectedEventAckType type) = 0;
37};
38
39} // namespace content
40
41#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
42