remoting/protocol/input_event_tracker.h

   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/skia/include/core/SkPoint.h"
  14
  15 namespace remoting {
  16 namespace 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.
  21 class 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 InjectMouseEvent(const MouseEvent& event) OVERRIDE;
  39
  40  private:
  41   protocol::InputStub* input_stub_;
  42
  43   std::set<uint32> pressed_keys_;
  44
  45   SkIPoint mouse_pos_;
  46   uint32 mouse_button_state_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(InputEventTracker);
  49 };
  50
  51 }  // namespace protocol
  52 }  // namespace remoting
  53
  54 #endif  // REMOTING_PROTOCOL_INPUT_EVENT_TRACKER_H_