1// Copyright (c) 2012 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 REMOTING_PROTOCOL_INPUT_EVENT_TRACKER_H_
6#define REMOTING_PROTOCOL_INPUT_EVENT_TRACKER_H_
7
8#include <set>
9
10#include "base/basictypes.h"
11#include "base/compiler_specific.h"
12#include "remoting/protocol/input_stub.h"
13#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
14
15namespace remoting {
16namespace protocol {
17
18// Filtering InputStub which tracks mouse and keyboard input events before
19// passing them on to |input_stub|, and can dispatch release events to
20// |input_stub| for all currently-pressed keys and buttons when necessary.
21class InputEventTracker : public InputStub {
22 public:
23  explicit InputEventTracker(protocol::InputStub* input_stub);
24  virtual ~InputEventTracker();
25
26  // Returns true if the key with the specified USB code is currently pressed.
27  bool IsKeyPressed(uint32 usb_keycode) const;
28
29  // Returns the count of keys currently pressed.
30  int PressedKeyCount() const;
31
32  // Dispatch release events for all currently-pressed keys and mouse buttons
33  // to the InputStub.
34  void ReleaseAll();
35
36  // InputStub interface.
37  virtual void InjectKeyEvent(const KeyEvent& event) OVERRIDE;
38  virtual void InjectTextEvent(const TextEvent& event) OVERRIDE;
39  virtual void InjectMouseEvent(const MouseEvent& event) OVERRIDE;
40
41 private:
42  protocol::InputStub* input_stub_;
43
44  std::set<uint32> pressed_keys_;
45
46  webrtc::DesktopVector mouse_pos_;
47  uint32 mouse_button_state_;
48
49  DISALLOW_COPY_AND_ASSIGN(InputEventTracker);
50};
51
52}  // namespace protocol
53}  // namespace remoting
54
55#endif  // REMOTING_PROTOCOL_INPUT_EVENT_TRACKER_H_
56