arc-app-launcher: Minimal support for ARC app launcher.

components/arc/arc_bridge_service_impl.h

+// Copyright 2015 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.
+
+#ifndef COMPONENTS_ARC_ARC_BRIDGE_SERVICE_IMPL_H_
+#define COMPONENTS_ARC_ARC_BRIDGE_SERVICE_IMPL_H_
+
+#include "base/files/scoped_file.h"
+#include "base/macros.h"
+#include "base/sequenced_task_runner.h"
+#include "components/arc/arc_bridge_service.h"
+#include "ipc/ipc_channel_proxy.h"
+#include "ipc/ipc_listener.h"
+#include "ipc/ipc_message.h"
+
+namespace arc {
+
+// Real IPC based ArcBridgeService that is used in production.
+class ArcBridgeServiceImpl : public ArcBridgeService,
+                             public IPC::Listener {
+ public:
+
+  ArcBridgeServiceImpl(
+      const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner,
+      const scoped_refptr<base::SequencedTaskRunner>& file_task_runner);
+  ~ArcBridgeServiceImpl() override;
+
+  // DetectAvailability() should be called once D-Bus is available. It will
+  // call CheckArcAvailability() on the session_manager. This can only be
+  // called on the thread that this class was created on.
+  void DetectAvailability();
+
+  void HandleStartup() override;
+
+  void Shutdown() override;
+
+  bool RegisterInputDevice(const std::string& name,
+                           const std::string& device_type,
+                           base::ScopedFD fd) override;
+
+  // Requests to refresh an app list.
+  bool RefreshApps() override;
+
+  // Requests to launch an app.
+  bool LaunchApp(const std::string& package,
+                 const std::string& activity) override;
+
+  // Request to load icon of specific scale_factor.
+  bool RequestIcon(const std::string& package,
+                   const std::string& activity,
+                   int scale_factor) override;
+
+ private:
+  friend class ArcBridgeTest;
+  FRIEND_TEST_ALL_PREFIXES(ArcBridgeTest, Basic);
+  FRIEND_TEST_ALL_PREFIXES(ArcBridgeTest, ShutdownMidStartup);
+
+  // If all pre-requisites are true (ARC is available, it has been enabled, and
+  // the session has started), and ARC is stopped, start ARC. If ARC is running
+  // and the pre-requisites stop being true, stop ARC.
+  void PrerequisitesChanged();
+
+  // Binds to the socket specified by |socket_path|.
+  void SocketConnect(const base::FilePath& socket_path);
+
+  // Binds to the socket specified by |socket_path| after creating its parent
+  // directory is present.
+  void SocketConnectAfterEnsureParentDirectory(
+      const base::FilePath& socket_path,
+      bool directory_present);
+
+  // Internal connection method. Separated to make testing easier.
+  bool Connect(const IPC::ChannelHandle& handle, IPC::Channel::Mode mode);
+
+  // Finishes connecting after setting socket permissions.
+  void SocketConnectAfterSetSocketPermissions(const base::FilePath& socket_path,
+                                              bool socket_permissions_success);
+
+  // Stops the running instance.
+  void StopInstance();
+
+  // Called when the ARC instance has finished setting up and is ready for user
+  // interaction.
+  void OnInstanceReady();
+
+  // Called whenever ARC sends information about available apps.
+  void OnAppsRefreshed(const std::vector<std::string>& name,
+                       const std::vector<std::string>& packages,
+                       const std::vector<std::string>& activities);
+
+  // Called whenever ARC sends app icon data for specific scale factor.
+  void OnAppIcon(const std::string& package,
+                 const std::string& activity,
+                 int scale_factor,
+                 const std::vector<uint8_t>& icon_png_data);
+
+  // IPC::Listener:
+  bool OnMessageReceived(const IPC::Message& message) override;
+
+  // DBus callbacks.
+  void OnArcAvailable(bool available);
+  void OnInstanceStarted(bool success);
+  void OnInstanceStopped(bool success);
+
+  scoped_refptr<base::SingleThreadTaskRunner> ipc_task_runner_;
+  scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
+
+  scoped_ptr<IPC::ChannelProxy> ipc_channel_;
+
+  // If the user's session has started.
+  bool session_started_;
+
+  // WeakPtrFactory to use callbacks.
+  base::WeakPtrFactory<ArcBridgeServiceImpl> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ArcBridgeServiceImpl);
+};
+
+}  // namespace arc
+
+#endif  // COMPONENTS_ARC_ARC_BRIDGE_SERVICE_IMPL_H_