content/browser/renderer_host/input/input_ack_handler.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_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/browser/renderer_host/event_with_latency_info.h"
  10 #include "content/common/input/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
  14 namespace content {
  15
  16 // Provided customized ack response for input events.
  17 class CONTENT_EXPORT InputAckHandler {
  18  public:
  19   virtual ~InputAckHandler() {}
  20
  21   // Called upon event ack receipt from the renderer.
  22   virtual void OnKeyboardEventAck(
  23       const NativeWebKeyboardEventWithLatencyInfo& event,
  24       InputEventAckState ack_result) = 0;
  25   virtual void OnMouseEventAck(const MouseEventWithLatencyInfo& event,
  26                                InputEventAckState ack_result) = 0;
  27   virtual void OnWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
  28                                InputEventAckState ack_result) = 0;
  29   virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
  30                                InputEventAckState ack_result) = 0;
  31   virtual void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
  32                                  InputEventAckState ack_result) = 0;
  33
  34   enum UnexpectedEventAckType {
  35     UNEXPECTED_ACK,
  36     UNEXPECTED_EVENT_TYPE,
  37     BAD_ACK_MESSAGE
  38   };
  39   virtual void OnUnexpectedEventAck(UnexpectedEventAckType type) = 0;
  40 };
  41
  42 } // namespace content
  43
  44 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_