remoting/client/plugin/chromoting_instance.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_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_
   6 #define REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_
   7
   8 #include <string>
   9
  10 #include "base/gtest_prod_util.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/thread_task_runner_handle.h"
  14 #include "ppapi/c/pp_instance.h"
  15 #include "ppapi/c/pp_rect.h"
  16 #include "ppapi/c/pp_resource.h"
  17 #include "ppapi/cpp/instance.h"
  18 #include "ppapi/cpp/text_input_controller.h"
  19 #include "ppapi/cpp/var.h"
  20 #include "remoting/client/client_context.h"
  21 #include "remoting/client/client_user_interface.h"
  22 #include "remoting/client/key_event_mapper.h"
  23 #include "remoting/client/plugin/empty_cursor_filter.h"
  24 #include "remoting/client/plugin/pepper_cursor_setter.h"
  25 #include "remoting/client/plugin/pepper_input_handler.h"
  26 #include "remoting/client/plugin/pepper_plugin_thread_delegate.h"
  27 #include "remoting/client/plugin/pepper_video_renderer.h"
  28 #include "remoting/client/plugin/touch_input_scaler.h"
  29 #include "remoting/proto/event.pb.h"
  30 #include "remoting/protocol/client_stub.h"
  31 #include "remoting/protocol/clipboard_stub.h"
  32 #include "remoting/protocol/connection_to_host.h"
  33 #include "remoting/protocol/cursor_shape_stub.h"
  34 #include "remoting/protocol/input_event_tracker.h"
  35 #include "remoting/protocol/mouse_input_filter.h"
  36 #include "remoting/protocol/negotiating_client_authenticator.h"
  37 #include "remoting/protocol/third_party_client_authenticator.h"
  38
  39 namespace base {
  40 class DictionaryValue;
  41 }  // namespace base
  42
  43 namespace pp {
  44 class InputEvent;
  45 class Module;
  46 class VarDictionary;
  47 }  // namespace pp
  48
  49 namespace jingle_glue {
  50 class JingleThreadWrapper;
  51 }  // namespace jingle_glue
  52
  53 namespace webrtc {
  54 class DesktopRegion;
  55 class DesktopSize;
  56 class DesktopVector;
  57 }  // namespace webrtc
  58
  59 namespace remoting {
  60
  61 class ChromotingClient;
  62 class ClientContext;
  63 class DelegatingSignalStrategy;
  64 class PepperAudioPlayer;
  65 class PepperMouseLocker;
  66 class TokenFetcherProxy;
  67
  68 class ChromotingInstance : public ClientUserInterface,
  69                            public PepperVideoRenderer::EventHandler,
  70                            public protocol::ClipboardStub,
  71                            public protocol::CursorShapeStub,
  72                            public pp::Instance {
  73  public:
  74   // Plugin API version. This should be incremented whenever the API
  75   // interface changes.
  76   static const int kApiVersion = 7;
  77
  78   // Plugin API features. This allows orthogonal features to be supported
  79   // without bumping the API version.
  80   static const char kApiFeatures[];
  81
  82   // Capabilities supported by the plugin that should also be supported by the
  83   // webapp to be enabled.
  84   static const char kRequestedCapabilities[];
  85
  86   // Capabilities supported by the plugin that do not need to be supported by
  87   // the webapp to be enabled.
  88   static const char kSupportedCapabilities[];
  89
  90   // Backward-compatibility version used by for the messaging
  91   // interface. Should be updated whenever we remove support for
  92   // an older version of the API.
  93   static const int kApiMinMessagingVersion = 5;
  94
  95   // Backward-compatibility version used by for the ScriptableObject
  96   // interface. Should be updated whenever we remove support for
  97   // an older version of the API.
  98   static const int kApiMinScriptableVersion = 5;
  99
 100   explicit ChromotingInstance(PP_Instance instance);
 101   ~ChromotingInstance() override;
 102
 103   // pp::Instance interface.
 104   void DidChangeFocus(bool has_focus) override;
 105   void DidChangeView(const pp::View& view) override;
 106   bool Init(uint32_t argc, const char* argn[], const char* argv[]) override;
 107   void HandleMessage(const pp::Var& message) override;
 108   bool HandleInputEvent(const pp::InputEvent& event) override;
 109
 110   // ClientUserInterface interface.
 111   void OnConnectionState(protocol::ConnectionToHost::State state,
 112                          protocol::ErrorCode error) override;
 113   void OnConnectionReady(bool ready) override;
 114   void OnRouteChanged(const std::string& channel_name,
 115                       const protocol::TransportRoute& route) override;
 116   void SetCapabilities(const std::string& capabilities) override;
 117   void SetPairingResponse(
 118       const protocol::PairingResponse& pairing_response) override;
 119   void DeliverHostMessage(const protocol::ExtensionMessage& message) override;
 120   protocol::ClipboardStub* GetClipboardStub() override;
 121   protocol::CursorShapeStub* GetCursorShapeStub() override;
 122
 123   // protocol::ClipboardStub interface.
 124   void InjectClipboardEvent(const protocol::ClipboardEvent& event) override;
 125
 126   // protocol::CursorShapeStub interface.
 127   void SetCursorShape(const protocol::CursorShapeInfo& cursor_shape) override;
 128
 129   // PepperVideoRenderer::EventHandler interface.
 130   void OnVideoDecodeError() override;
 131   void OnVideoFirstFrameReceived() override;
 132   void OnVideoSize(const webrtc::DesktopSize& size,
 133                       const webrtc::DesktopVector& dpi) override;
 134   void OnVideoShape(const webrtc::DesktopRegion& shape) override;
 135   void OnVideoFrameDirtyRegion(
 136       const webrtc::DesktopRegion& dirty_region) override;
 137
 138   // Registers a global log message handler that redirects the log output to
 139   // our plugin instance.
 140   // This is called by the plugin's PPP_InitializeModule.
 141   // Note that no logging will be processed unless a ChromotingInstance has been
 142   // registered for logging (see RegisterLoggingInstance).
 143   static void RegisterLogMessageHandler();
 144
 145   // Registers this instance so it processes messages sent by the global log
 146   // message handler. This overwrites any previously registered instance.
 147   void RegisterLoggingInstance();
 148
 149   // Unregisters this instance so that debug log messages will no longer be sent
 150   // to it. If this instance is not the currently registered logging instance,
 151   // then the currently registered instance will stay in effect.
 152   void UnregisterLoggingInstance();
 153
 154   // A Log Message Handler that is called after each LOG message has been
 155   // processed. This must be of type LogMessageHandlerFunction defined in
 156   // base/logging.h.
 157   static bool LogToUI(int severity, const char* file, int line,
 158                       size_t message_start, const std::string& str);
 159
 160   // Requests the webapp to fetch a third-party token.
 161   void FetchThirdPartyToken(
 162       const GURL& token_url,
 163       const std::string& host_public_key,
 164       const std::string& scope,
 165       const base::WeakPtr<TokenFetcherProxy> pepper_token_fetcher);
 166
 167  private:
 168   FRIEND_TEST_ALL_PREFIXES(ChromotingInstanceTest, TestCaseSetup);
 169
 170   // Used as the |FetchSecretCallback| for IT2Me (or Me2Me from old webapps).
 171   // Immediately calls |secret_fetched_callback| with |shared_secret|.
 172   static void FetchSecretFromString(
 173       const std::string& shared_secret,
 174       bool pairing_supported,
 175       const protocol::SecretFetchedCallback& secret_fetched_callback);
 176
 177   // Message handlers for messages that come from JavaScript. Called
 178   // from HandleMessage().
 179   void HandleConnect(const base::DictionaryValue& data);
 180   void HandleDisconnect(const base::DictionaryValue& data);
 181   void HandleOnIncomingIq(const base::DictionaryValue& data);
 182   void HandleReleaseAllKeys(const base::DictionaryValue& data);
 183   void HandleInjectKeyEvent(const base::DictionaryValue& data);
 184   void HandleRemapKey(const base::DictionaryValue& data);
 185   void HandleTrapKey(const base::DictionaryValue& data);
 186   void HandleSendClipboardItem(const base::DictionaryValue& data);
 187   void HandleNotifyClientResolution(const base::DictionaryValue& data);
 188   void HandlePauseVideo(const base::DictionaryValue& data);
 189   void HandleVideoControl(const base::DictionaryValue& data);
 190   void HandlePauseAudio(const base::DictionaryValue& data);
 191   void HandleOnPinFetched(const base::DictionaryValue& data);
 192   void HandleOnThirdPartyTokenFetched(const base::DictionaryValue& data);
 193   void HandleRequestPairing(const base::DictionaryValue& data);
 194   void HandleExtensionMessage(const base::DictionaryValue& data);
 195   void HandleAllowMouseLockMessage();
 196   void HandleSendMouseInputWhenUnfocused();
 197   void HandleDelegateLargeCursors();
 198   void HandleEnableDebugRegion(const base::DictionaryValue& data);
 199   void HandleEnableTouchEvents(const base::DictionaryValue& data);
 200
 201   void Disconnect();
 202
 203   // Helper method to post messages to the webapp.
 204   void PostChromotingMessage(const std::string& method,
 205                              const pp::VarDictionary& data);
 206
 207   // Same as above, but serializes messages to JSON before sending them.  This
 208   // method is used for backward compatibility with older version of the webapp
 209   // that expect to received most messages formatted using JSON.
 210   //
 211   // TODO(sergeyu): When all current versions of the webapp support raw messages
 212   // remove this method and use PostChromotingMessage() instead.
 213   void PostLegacyJsonMessage(const std::string& method,
 214                              scoped_ptr<base::DictionaryValue> data);
 215
 216   // Posts trapped keys to the web-app to handle.
 217   void SendTrappedKey(uint32 usb_keycode, bool pressed);
 218
 219   // Callback for DelegatingSignalStrategy.
 220   void SendOutgoingIq(const std::string& iq);
 221
 222   void SendPerfStats();
 223
 224   void ProcessLogToUI(const std::string& message);
 225
 226   // Returns true if the hosting content has the chrome-extension:// scheme.
 227   bool IsCallerAppOrExtension();
 228
 229   // Returns true if there is a ConnectionToHost and it is connected.
 230   bool IsConnected();
 231
 232   // Used as the |FetchSecretCallback| for Me2Me connections.
 233   // Uses the PIN request dialog in the webapp to obtain the shared secret.
 234   void FetchSecretFromDialog(
 235       bool pairing_supported,
 236       const protocol::SecretFetchedCallback& secret_fetched_callback);
 237
 238   // Helper to log messages in the JS console in the webapp.
 239   void LogToWebapp(const std::string& message);
 240
 241   bool initialized_;
 242
 243   PepperPluginThreadDelegate plugin_thread_delegate_;
 244   scoped_refptr<PluginThreadTaskRunner> plugin_task_runner_;
 245   scoped_ptr<base::ThreadTaskRunnerHandle> thread_task_runner_handle_;
 246   scoped_ptr<jingle_glue::JingleThreadWrapper> thread_wrapper_;
 247   ClientContext context_;
 248   scoped_ptr<PepperVideoRenderer> video_renderer_;
 249   pp::View plugin_view_;
 250
 251   // Contains the most-recently-reported desktop shape, if any.
 252   scoped_ptr<webrtc::DesktopRegion> desktop_shape_;
 253
 254   scoped_ptr<DelegatingSignalStrategy> signal_strategy_;
 255
 256   scoped_ptr<ChromotingClient> client_;
 257
 258   // Input pipeline components, in reverse order of distance from input source.
 259   protocol::MouseInputFilter mouse_input_filter_;
 260   protocol::InputEventTracker input_tracker_;
 261   TouchInputScaler touch_input_scaler_;
 262   KeyEventMapper key_mapper_;
 263   scoped_ptr<protocol::InputFilter> normalizing_input_filter_;
 264   PepperInputHandler input_handler_;
 265
 266   // Cursor shape handling components, in reverse order to that in which they
 267   // process cursor shape events. Note that |mouse_locker_| appears in the
 268   // cursor pipeline since it is triggered by receipt of an empty cursor.
 269   PepperCursorSetter cursor_setter_;
 270   scoped_ptr<PepperMouseLocker> mouse_locker_;
 271   EmptyCursorFilter empty_cursor_filter_;
 272
 273   // Used to control text input settings, such as whether to show the IME.
 274   pp::TextInputController text_input_controller_;
 275
 276   // PIN Fetcher.
 277   bool use_async_pin_dialog_;
 278   protocol::SecretFetchedCallback secret_fetched_callback_;
 279
 280   base::WeakPtr<TokenFetcherProxy> token_fetcher_proxy_;
 281
 282   // Weak reference to this instance, used for global logging and task posting.
 283   base::WeakPtrFactory<ChromotingInstance> weak_factory_;
 284
 285   DISALLOW_COPY_AND_ASSIGN(ChromotingInstance);
 286 };
 287
 288 }  // namespace remoting
 289
 290 #endif  // REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_