remoting/client/jni/chromoting_jni_runtime.h

   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 #ifndef REMOTING_CLIENT_JNI_CHROMOTING_JNI_RUNTIME_H_
   6 #define REMOTING_CLIENT_JNI_CHROMOTING_JNI_RUNTIME_H_
   7
   8 #include <jni.h>
   9 #include <string>
  10
  11 #include "base/android/scoped_java_ref.h"
  12 #include "base/at_exit.h"
  13 #include "net/url_request/url_request_context_getter.h"
  14 #include "remoting/base/auto_thread.h"
  15 #include "remoting/client/jni/chromoting_jni_instance.h"
  16 #include "remoting/protocol/connection_to_host.h"
  17
  18 template<typename T> struct DefaultSingletonTraits;
  19
  20 namespace remoting {
  21
  22 bool RegisterJni(JNIEnv* env);
  23
  24 // Houses the global resources on which the Chromoting components run
  25 // (e.g. message loops and task runners). Proxies outgoing JNI calls from its
  26 // ChromotingJniInstance member to Java. All its methods should be invoked
  27 // exclusively from the UI thread unless otherwise noted.
  28 class ChromotingJniRuntime {
  29  public:
  30   // This class is instantiated at process initialization and persists until
  31   // we close. Its components are reused across |ChromotingJniInstance|s.
  32   static ChromotingJniRuntime* GetInstance();
  33
  34   scoped_refptr<AutoThreadTaskRunner> ui_task_runner() {
  35     return ui_task_runner_;
  36   }
  37
  38   scoped_refptr<AutoThreadTaskRunner> network_task_runner() {
  39     return network_task_runner_;
  40   }
  41
  42   scoped_refptr<AutoThreadTaskRunner> display_task_runner() {
  43     return display_task_runner_;
  44   }
  45
  46   scoped_refptr<net::URLRequestContextGetter> url_requester() {
  47     return url_requester_;
  48   }
  49
  50   // Initiates a connection with the specified host. Only call when a host
  51   // connection is active (i.e. between a call to Connect() and the
  52   // corresponding call to Disconnect()). To skip the attempt at pair-based
  53   // authentication, leave |pairing_id| and |pairing_secret| as empty strings.
  54   void ConnectToHost(const char* username,
  55                      const char* auth_token,
  56                      const char* host_jid,
  57                      const char* host_id,
  58                      const char* host_pubkey,
  59                      const char* pairing_id,
  60                      const char* pairing_secret,
  61                      const char* capabilities);
  62
  63   // Terminates any ongoing connection attempt and cleans up by nullifying
  64   // |session_|. This is a no-op unless |session| is currently non-null.
  65   void DisconnectFromHost();
  66
  67   // Returns the client for the currently-active session. Do not call if
  68   // |session| is null.
  69   scoped_refptr<ChromotingJniInstance> session() {
  70     DCHECK(session_.get());
  71     return session_;
  72   }
  73
  74   // Notifies Java code of the current connection status. Call on UI thread.
  75   void OnConnectionState(protocol::ConnectionToHost::State state,
  76                          protocol::ErrorCode error);
  77
  78   // Pops up a dialog box asking the user to enter a PIN. Call on UI thread.
  79   void DisplayAuthenticationPrompt(bool pairing_supported);
  80
  81   // Saves new pairing credentials to permanent storage. Call on UI thread.
  82   void CommitPairingCredentials(const std::string& host,
  83                                 const std::string& id,
  84                                 const std::string& secret);
  85
  86   // Pops up a third party login page to fetch token required for
  87   // authentication. Call on UI thread.
  88   void FetchThirdPartyToken(const GURL& token_url,
  89                             const std::string& client_id,
  90                             const std::string& scope);
  91
  92   // Pass on the set of negotiated capabilities to the client.
  93   void SetCapabilities(const std::string& capabilities);
  94
  95   // Passes on the deconstructed ExtensionMessage to the client to handle
  96   // appropriately.
  97   void HandleExtensionMessage(const std::string& type,
  98                               const std::string& message);
  99
 100   // Creates a new Bitmap object to store a video frame.
 101   base::android::ScopedJavaLocalRef<jobject> NewBitmap(
 102       webrtc::DesktopSize size);
 103
 104   // Updates video frame bitmap. |bitmap| must be an instance of
 105   // android.graphics.Bitmap. Call on the display thread.
 106   void UpdateFrameBitmap(jobject bitmap);
 107
 108   // Updates cursor shape. Call on display thread.
 109   void UpdateCursorShape(const protocol::CursorShapeInfo& cursor_shape);
 110
 111   // Draws the latest image buffer onto the canvas. Call on the display thread.
 112   void RedrawCanvas();
 113
 114  private:
 115   ChromotingJniRuntime();
 116
 117   // Forces a DisconnectFromHost() in case there is any active or failed
 118   // connection, then proceeds to tear down the Chromium dependencies on which
 119   // all sessions depended. Because destruction only occurs at application exit
 120   // after all connections have terminated, it is safe to make unretained
 121   // cross-thread calls on the class.
 122   virtual ~ChromotingJniRuntime();
 123
 124   // Detaches JVM from the current thread, then signals. Doesn't own |waiter|.
 125   void DetachFromVmAndSignal(base::WaitableEvent* waiter);
 126
 127   // Used by the Chromium libraries to clean up the base and net libraries' JNI
 128   // bindings. It must persist for the lifetime of the singleton.
 129   scoped_ptr<base::AtExitManager> at_exit_manager_;
 130
 131   // Chromium code's connection to the Java message loop.
 132   scoped_ptr<base::MessageLoopForUI> ui_loop_;
 133
 134   // References to native threads.
 135   scoped_refptr<AutoThreadTaskRunner> ui_task_runner_;
 136   scoped_refptr<AutoThreadTaskRunner> network_task_runner_;
 137   scoped_refptr<AutoThreadTaskRunner> display_task_runner_;
 138
 139   scoped_refptr<net::URLRequestContextGetter> url_requester_;
 140
 141   // Contains all connection-specific state.
 142   scoped_refptr<ChromotingJniInstance> session_;
 143
 144   friend struct DefaultSingletonTraits<ChromotingJniRuntime>;
 145
 146   DISALLOW_COPY_AND_ASSIGN(ChromotingJniRuntime);
 147 };
 148
 149 }  // namespace remoting
 150
 151 #endif