components/filesystem/file_system_app.h

   1 // Copyright 2015 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 COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_
   6 #define COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_
   7
   8 #include "base/macros.h"
   9 #include "components/filesystem/directory_impl.h"
  10 #include "components/filesystem/file_system_impl.h"
  11 #include "components/filesystem/public/interfaces/file_system.mojom.h"
  12 #include "mojo/application/public/cpp/application_delegate.h"
  13 #include "mojo/application/public/cpp/interface_factory.h"
  14
  15 namespace mojo {
  16 class ApplicationImpl;
  17 }
  18
  19 namespace filesystem {
  20
  21 class FileSystemApp : public mojo::ApplicationDelegate,
  22                       public mojo::InterfaceFactory<FileSystem> {
  23  public:
  24   FileSystemApp();
  25   ~FileSystemApp() override;
  26
  27   // Called by individual FileSystem objects to register lifetime events.
  28   void RegisterDirectoryToClient(DirectoryImpl* directory,
  29                                  FileSystemClientPtr client);
  30
  31  private:
  32   // We set the DirectoryImpl's error handler to this function. We do this so
  33   // that we can QuitNow() once the last DirectoryImpl has closed itself.
  34   void OnDirectoryConnectionError(DirectoryImpl* directory);
  35
  36   // |ApplicationDelegate| override:
  37   void Initialize(mojo::ApplicationImpl* app) override;
  38   bool ConfigureIncomingConnection(
  39       mojo::ApplicationConnection* connection) override;
  40   bool OnShellConnectionError() override;
  41
  42   // |InterfaceFactory<Files>| implementation:
  43   void Create(mojo::ApplicationConnection* connection,
  44               mojo::InterfaceRequest<FileSystem> request) override;
  45
  46   // Use a vector to work around map not letting us use FileSystemClientPtr as
  47   // a value in a std::map. The move constructors are to allow us to deal with
  48   // FileSystemClientPtr inside a vector.
  49   struct Client {
  50     Client(DirectoryImpl* directory, FileSystemClientPtr fs_client);
  51     Client(Client&& rhs);
  52     ~Client();
  53
  54     Client& operator=(Client&& rhs);
  55
  56     DirectoryImpl* directory_;
  57     FileSystemClientPtr fs_client_;
  58   };
  59   std::vector<Client> client_mapping_;
  60
  61   mojo::ApplicationImpl* app_;
  62
  63   // Set to true when our shell connection is closed. On connection error, we
  64   // then broadcast a notification to all FileSystemClients that they should
  65   // shut down. Once the final one does, then we QuitNow().
  66   bool in_shutdown_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(FileSystemApp);
  69 };
  70
  71 }  // namespace filesystem
  72
  73 #endif  // COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_