Adding ability to stream windows and inject events to them

remoting/host/remoting_me2me_host.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This file implements a standalone host process for Me2Me.
 
 #include <string>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
@@ skipping 47 matching lines @@
 #include "remoting/host/ipc_constants.h"
 #include "remoting/host/ipc_desktop_environment.h"
 #include "remoting/host/ipc_host_event_logger.h"
 #include "remoting/host/json_host_config.h"
 #include "remoting/host/logging.h"
 #include "remoting/host/me2me_desktop_environment.h"
 #include "remoting/host/pairing_registry_delegate.h"
 #include "remoting/host/policy_hack/policy_watcher.h"
 #include "remoting/host/session_manager_factory.h"
 #include "remoting/host/signaling_connector.h"
+#include "remoting/host/single_window_desktop_environment.h"
 #include "remoting/host/token_validator_factory_impl.h"
 #include "remoting/host/usage_stats_consent.h"
 #include "remoting/host/username.h"
 #include "remoting/jingle_glue/network_settings.h"
 #include "remoting/jingle_glue/xmpp_signal_strategy.h"
 #include "remoting/protocol/me2me_host_authenticator_factory.h"
 #include "remoting/protocol/pairing_registry.h"
 #include "remoting/protocol/token_validator.h"
 
 #if defined(OS_POSIX)
@@ skipping 42 matching lines @@
 // when it is successfully started.
 const char kSignalParentSwitchName[] = "signal-parent";
 
 // Command line switch used to enable VP9 encoding.
 const char kEnableVp9SwitchName[] = "enable-vp9";
 
 // Value used for --host-config option to indicate that the path must be read
 // from stdin.
 const char kStdinConfigPath[] = "-";
 
+const char kWindowIdSwitchName[] = "window-id";
+
 }  // namespace
 
 namespace remoting {
 
 class HostProcess
     : public ConfigWatcher::Delegate,
       public HeartbeatSender::Listener,
       public HostChangeNotificationListener::Listener,
       public IPC::Listener,
       public base::RefCountedThreadSafe<HostProcess> {
@@ skipping 155 matching lines @@
   bool allow_relay_;
   int min_udp_port_;
   int max_udp_port_;
   std::string talkgadget_prefix_;
   bool allow_pairing_;
 
   bool curtain_required_;
   ThirdPartyAuthConfig third_party_auth_config_;
   bool enable_gnubby_auth_;
 
+  // Boolean to change flow, where ncessary, if we're
+  // capturing a window instead of the entire desktop.
+  bool enable_window_capture_;
+
+  // Used to specify which window to stream, if enabled.
+  webrtc::WindowId window_id_;
+
   scoped_ptr<OAuthTokenGetter> oauth_token_getter_;
   scoped_ptr<XmppSignalStrategy> signal_strategy_;
   scoped_ptr<SignalingConnector> signaling_connector_;
   scoped_ptr<HeartbeatSender> heartbeat_sender_;
   scoped_ptr<HostStatusSender> host_status_sender_;
   scoped_ptr<HostChangeNotificationListener> host_change_notification_listener_;
   scoped_ptr<HostStatusLogger> host_status_logger_;
   scoped_ptr<HostEventLogger> host_event_logger_;
 
   scoped_ptr<ChromotingHost> host_;
@@ skipping 124 matching lines @@
   if (!xmpp_server_valid) {
     LOG(ERROR) << "Invalid XMPP server: " <<
         service_urls->xmpp_server_address();
     return false;
   }
   xmpp_server_config_.use_tls = service_urls->xmpp_server_use_tls();
   directory_bot_jid_ = service_urls->directory_bot_jid();
 
   signal_parent_ = cmd_line->HasSwitch(kSignalParentSwitchName);
 
+  enable_window_capture_ = cmd_line->HasSwitch(kWindowIdSwitchName);
+  if (enable_window_capture_) {
+    // uint32_t is large enough to hold window IDs on all platforms.
+    uint32_t window_id;
+    if (base::StringToUint(
+            cmd_line->GetSwitchValueASCII(kWindowIdSwitchName),
+            &window_id)) {
+      window_id_ = static_cast<webrtc::WindowId>(window_id);
+    } else {
+      // Set enable_window_capture_ to false because the window id from the
+      // command line was not found. Continue streaming the entire desktop
+      // instead.

[Wez, 2014/08/08 22:12:13]

This comment is out of date.

[ronakvora do not use, 2014/08/08 22:28:26]

Done.

+      LOG(ERROR) << "Window with window id: " << window_id_
+                 << " not found. Shutting down host.";
+      enable_window_capture_ = false;

[Wez, 2014/08/08 22:12:14]

No need to set this flag in this case, since you're going to quit.

You need to make sure that the process exits with a meaningful exit code,
though.

[ronakvora do not use, 2014/08/08 22:28:26]

Isn't the meaningful exit code to return false? 

[Wez, 2014/08/11 06:40:36]

That's the function return code - what will the process *exit code* be when it
quits because of a bad window-id parameter?

[Sergey Ulanov, 2014/08/12 18:18:00]

Host should exit with kUsageExitCode after returning false here (see
HostProcess::StartOnUiThread()), and that's an appropriate error code in that
case.

[ronakvora do not use, 2014/08/13 18:04:43]

Got it. removed.

+      return false;
+    }
+  }
   return true;
 }
 
 void HostProcess::OnConfigUpdated(
     const std::string& serialized_config) {
   if (!context_->network_task_runner()->BelongsToCurrentThread()) {
     context_->network_task_runner()->PostTask(FROM_HERE,
         base::Bind(&HostProcess::OnConfigUpdated, this, serialized_config));
     return;
   }
@@ skipping 210 matching lines @@
 #if defined(OS_WIN)
   IpcDesktopEnvironmentFactory* desktop_environment_factory =
       new IpcDesktopEnvironmentFactory(
           context_->audio_task_runner(),
           context_->network_task_runner(),
           context_->video_capture_task_runner(),
           context_->network_task_runner(),
           daemon_channel_.get());
   desktop_session_connector_ = desktop_environment_factory;
 #else  // !defined(OS_WIN)
-  DesktopEnvironmentFactory* desktop_environment_factory =
+  DesktopEnvironmentFactory* desktop_environment_factory;
+  if (enable_window_capture_) {
+    desktop_environment_factory =
+      new SingleWindowDesktopEnvironmentFactory(
+          context_->network_task_runner(),
+          context_->input_task_runner(),
+          context_->ui_task_runner(),
+          window_id_);
+  } else {
+    desktop_environment_factory =
       new Me2MeDesktopEnvironmentFactory(
           context_->network_task_runner(),
           context_->input_task_runner(),
           context_->ui_task_runner());
+  }
 #endif  // !defined(OS_WIN)
 
   desktop_environment_factory_.reset(desktop_environment_factory);
   desktop_environment_factory_->SetEnableGnubbyAuth(enable_gnubby_auth_);
 
   context_->network_task_runner()->PostTask(
       FROM_HERE,
       base::Bind(&HostProcess::StartOnNetworkThread, this));
 }
 
@@ skipping 681 matching lines @@
   return exit_code;
 }
 
 }  // namespace remoting
 
 #if !defined(OS_WIN)
 int main(int argc, char** argv) {
   return remoting::HostMain(argc, argv);
 }
 #endif  // !defined(OS_WIN)