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      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_HOST_MOUSE_CLAMPING_FILTER_H_
      6 #define REMOTING_HOST_MOUSE_CLAMPING_FILTER_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "remoting/protocol/mouse_input_filter.h"
     10 #include "remoting/protocol/video_stub.h"
     11 
     12 namespace remoting {
     13 
     14 // Filtering VideoStub implementation which configures a MouseInputFilter to
     15 // clamp mouse events to fall within the dimensions of the most-recently
     16 // received video frame.
     17 class MouseClampingFilter : public protocol::VideoStub {
     18  public:
     19   explicit MouseClampingFilter(protocol::InputStub* input_stub);
     20   virtual ~MouseClampingFilter();
     21 
     22   protocol::InputStub* input_filter() { return &input_filter_; }
     23 
     24   void set_video_stub(protocol::VideoStub* video_stub) {
     25     video_stub_ = video_stub;
     26   }
     27 
     28   // protocol::VideoStub implementation.
     29   virtual void ProcessVideoPacket(scoped_ptr<VideoPacket> video_packet,
     30                                   const base::Closure& done) OVERRIDE;
     31 
     32  private:
     33   // Clamps mouse event coordinates to the video dimensions.
     34   protocol::MouseInputFilter input_filter_;
     35 
     36   protocol::VideoStub* video_stub_;
     37 
     38   DISALLOW_COPY_AND_ASSIGN(MouseClampingFilter);
     39 };
     40 
     41 }  // namespace remoting
     42 
     43 #endif  // REMOTING_HOST_MOUSE_CLAMPING_FILTER_H_
     44