remoting/host/chromeos/clipboard_aura.h

   1 // Copyright 2014 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_CLIPBOARD_AURA_H_
   6 #define REMOTING_HOST_CLIPBOARD_AURA_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/threading/thread_checker.h"
  10 #include "base/timer/timer.h"
  11 #include "remoting/host/clipboard.h"
  12
  13 namespace remoting {
  14
  15 namespace protocol {
  16 class ClipboardStub;
  17 }  // namespace protocol
  18
  19 // On Chrome OS, the clipboard is managed by aura instead of the underlying
  20 // native platform (e.g. x11, ozone, etc).
  21 //
  22 // This class (1) monitors the aura clipboard for changes and notifies the
  23 // |client_clipboard|, and (2) provides an interface to inject clipboard event
  24 // into aura.
  25 //
  26 // The public API of this class can be called in any thread as internally it
  27 // always posts the call to the |ui_task_runner|.  On ChromeOS, that should
  28 // be the UI thread of the browser process.
  29 class ClipboardAura : public Clipboard {
  30  public:
  31   explicit ClipboardAura();
  32   ~ClipboardAura() override;
  33
  34   // Clipboard interface.
  35   void Start(scoped_ptr<protocol::ClipboardStub> client_clipboard) override;
  36   void InjectClipboardEvent(const protocol::ClipboardEvent& event) override;
  37
  38   // Overrides the clipboard polling interval for unit test.
  39   void SetPollingIntervalForTesting(base::TimeDelta polling_interval);
  40
  41  private:
  42   void CheckClipboardForChanges();
  43
  44   base::ThreadChecker thread_checker_;
  45   scoped_ptr<protocol::ClipboardStub> client_clipboard_;
  46   base::RepeatingTimer<ClipboardAura> clipboard_polling_timer_;
  47   uint64 current_change_count_;
  48   base::TimeDelta polling_interval_;
  49
  50   DISALLOW_COPY_AND_ASSIGN(ClipboardAura);
  51 };
  52
  53 }  // namespace remoting
  54
  55 #endif  // REMOTING_HOST_CLIPBOARD_AURA_H_