src/remoting/protocol/clipboard_echo_filter.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_CLIPBOARD_ECHO_FILTER_H_
   6 #define REMOTING_PROTOCOL_CLIPBOARD_ECHO_FILTER_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/compiler_specific.h"
  12 #include "remoting/protocol/clipboard_stub.h"
  13
  14 namespace remoting {
  15 namespace protocol {
  16
  17 // ClipboardEchoFilter stops the host sending a clipboard item to the
  18 // client, if that item was the latest item received from the client.
  19 class ClipboardEchoFilter {
  20  public:
  21   ClipboardEchoFilter();
  22   ~ClipboardEchoFilter();
  23
  24   // Sets the ClipboardStub that sends events to the client.
  25   void set_client_stub(ClipboardStub* client_stub);
  26
  27   // Sets the ClipboardStub that sends events to the host.
  28   void set_host_stub(ClipboardStub* host_stub);
  29
  30   // Gets the ClipboardStub that sends events through this filter and on to the
  31   // client.
  32   ClipboardStub* client_filter();
  33
  34   // Gets the ClipboardStub that sends events through this filter and on to the
  35   // host.
  36   ClipboardStub* host_filter();
  37
  38  private:
  39   class ClientFilter : public ClipboardStub {
  40    public:
  41     ClientFilter(ClipboardEchoFilter* filter);
  42     virtual void InjectClipboardEvent(const ClipboardEvent& event) OVERRIDE;
  43
  44    private:
  45     ClipboardEchoFilter* filter_;
  46   };
  47
  48   class HostFilter : public ClipboardStub {
  49    public:
  50     HostFilter(ClipboardEchoFilter* filter);
  51     virtual void InjectClipboardEvent(const ClipboardEvent& event) OVERRIDE;
  52
  53    private:
  54     ClipboardEchoFilter* filter_;
  55   };
  56
  57   void InjectClipboardEventToHost(const ClipboardEvent& event);
  58   void InjectClipboardEventToClient(const ClipboardEvent& event);
  59
  60   ClipboardStub* host_stub_;
  61   ClipboardStub* client_stub_;
  62   ClientFilter client_filter_;
  63   HostFilter host_filter_;
  64
  65   // The latest item received from the client.
  66   std::string client_latest_mime_type_;
  67   std::string client_latest_data_;
  68
  69   DISALLOW_COPY_AND_ASSIGN(ClipboardEchoFilter);
  70 };
  71
  72 }  // namespace protocol
  73 }  // namespace remoting
  74
  75 #endif  // REMOTING_PROTOCOL_CLIPBOARD_ECHO_FILTER_H_