src/remoting/host/host_window_proxy.cc

   1 // Copyright 2013 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 #include "remoting/host/host_window_proxy.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/logging.h"
  10 #include "base/single_thread_task_runner.h"
  11 #include "remoting/host/client_session_control.h"
  12 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
  13
  14 namespace remoting {
  15
  16 // Runs an instance of |HostWindow| on the |ui_task_runner_| thread.
  17 class HostWindowProxy::Core
  18     : public base::RefCountedThreadSafe<Core>,
  19       public ClientSessionControl {
  20  public:
  21   Core(scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
  22        scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
  23        scoped_ptr<HostWindow> host_window);
  24
  25   // Starts |host_window_| on the |ui_task_runner_| thread.
  26   void Start(const base::WeakPtr<ClientSessionControl>& client_session_control);
  27
  28   // Destroys |host_window_| on the |ui_task_runner_| thread.
  29   void Stop();
  30
  31  private:
  32   friend class base::RefCountedThreadSafe<Core>;
  33   virtual ~Core();
  34
  35   // Start() and Stop() equivalents called on the |ui_task_runner_| thread.
  36   void StartOnUiThread(const std::string& client_jid);
  37   void StopOnUiThread();
  38
  39   // ClientSessionControl interface.
  40   virtual const std::string& client_jid() const OVERRIDE;
  41   virtual void DisconnectSession() OVERRIDE;
  42   virtual void OnLocalMouseMoved(
  43       const webrtc::DesktopVector& position) OVERRIDE;
  44   virtual void SetDisableInputs(bool disable_inputs) OVERRIDE;
  45   virtual void ResetVideoPipeline() OVERRIDE;
  46
  47   // Task runner on which public methods of this class must be called.
  48   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
  49
  50   // Task runner on which |host_window_| is running.
  51   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
  52
  53   // Stores the client's JID so it can be read on the |ui_task_runner_| thread.
  54   std::string client_jid_;
  55
  56   // Used to notify the caller about the local user's actions on
  57   // the |caller_task_runner| thread.
  58   base::WeakPtr<ClientSessionControl> client_session_control_;
  59
  60   // The wrapped |HostWindow| instance running on the |ui_task_runner_| thread.
  61   scoped_ptr<HostWindow> host_window_;
  62
  63   // Used to create the control pointer passed to |host_window_|.
  64   base::WeakPtrFactory<ClientSessionControl> weak_factory_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(Core);
  67 };
  68
  69 HostWindowProxy::HostWindowProxy(
  70     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
  71     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
  72     scoped_ptr<HostWindow> host_window) {
  73   DCHECK(caller_task_runner->BelongsToCurrentThread());
  74
  75   // Detach |host_window| from the calling thread so that |Core| could run it on
  76   // the |ui_task_runner_| thread.
  77   host_window->DetachFromThread();
  78   core_ = new Core(caller_task_runner, ui_task_runner, host_window.Pass());
  79 }
  80
  81 HostWindowProxy::~HostWindowProxy() {
  82   DCHECK(CalledOnValidThread());
  83
  84   core_->Stop();
  85 }
  86
  87 void HostWindowProxy::Start(
  88     const base::WeakPtr<ClientSessionControl>& client_session_control) {
  89   DCHECK(CalledOnValidThread());
  90
  91   core_->Start(client_session_control);
  92 }
  93
  94 HostWindowProxy::Core::Core(
  95     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
  96     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
  97     scoped_ptr<HostWindow> host_window)
  98     : caller_task_runner_(caller_task_runner),
  99       ui_task_runner_(ui_task_runner),
 100       host_window_(host_window.Pass()),
 101       weak_factory_(this) {
 102   DCHECK(caller_task_runner->BelongsToCurrentThread());
 103 }
 104
 105 void HostWindowProxy::Core::Start(
 106     const base::WeakPtr<ClientSessionControl>& client_session_control) {
 107   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 108   DCHECK(!client_session_control_.get());
 109   DCHECK(client_session_control.get());
 110
 111   client_session_control_ = client_session_control;
 112   ui_task_runner_->PostTask(
 113       FROM_HERE, base::Bind(&Core::StartOnUiThread, this,
 114                             client_session_control->client_jid()));
 115 }
 116
 117 void HostWindowProxy::Core::Stop() {
 118   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 119
 120   ui_task_runner_->PostTask(FROM_HERE, base::Bind(&Core::StopOnUiThread, this));
 121 }
 122
 123 HostWindowProxy::Core::~Core() {
 124   DCHECK(!host_window_);
 125 }
 126
 127 void HostWindowProxy::Core::StartOnUiThread(const std::string& client_jid) {
 128   DCHECK(ui_task_runner_->BelongsToCurrentThread());
 129   DCHECK(client_jid_.empty());
 130
 131   client_jid_ = client_jid;
 132   host_window_->Start(weak_factory_.GetWeakPtr());
 133 }
 134
 135 void HostWindowProxy::Core::StopOnUiThread() {
 136   DCHECK(ui_task_runner_->BelongsToCurrentThread());
 137
 138   host_window_.reset();
 139 }
 140
 141 const std::string& HostWindowProxy::Core::client_jid() const {
 142   DCHECK(ui_task_runner_->BelongsToCurrentThread());
 143
 144   return client_jid_;
 145 }
 146
 147 void HostWindowProxy::Core::DisconnectSession() {
 148   if (!caller_task_runner_->BelongsToCurrentThread()) {
 149     caller_task_runner_->PostTask(FROM_HERE,
 150                                   base::Bind(&Core::DisconnectSession, this));
 151     return;
 152   }
 153
 154   if (client_session_control_.get())
 155     client_session_control_->DisconnectSession();
 156 }
 157
 158 void HostWindowProxy::Core::OnLocalMouseMoved(
 159     const webrtc::DesktopVector& position) {
 160   if (!caller_task_runner_->BelongsToCurrentThread()) {
 161     caller_task_runner_->PostTask(
 162         FROM_HERE, base::Bind(&Core::OnLocalMouseMoved, this, position));
 163     return;
 164   }
 165
 166   if (client_session_control_.get())
 167     client_session_control_->OnLocalMouseMoved(position);
 168 }
 169
 170 void HostWindowProxy::Core::SetDisableInputs(bool disable_inputs) {
 171   if (!caller_task_runner_->BelongsToCurrentThread()) {
 172     caller_task_runner_->PostTask(
 173         FROM_HERE, base::Bind(&Core::SetDisableInputs, this, disable_inputs));
 174     return;
 175   }
 176
 177   if (client_session_control_.get())
 178     client_session_control_->SetDisableInputs(disable_inputs);
 179 }
 180
 181 void HostWindowProxy::Core::ResetVideoPipeline() {
 182   // ResetVideoPipeline is only used by HostExtensionSession implementations.
 183   NOTREACHED();
 184 }
 185
 186 }  // namespace remoting