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 // This file provides the core implementation of fileapi methods. 6 // The functions should be called on UI thread. 7 // Note that most method invocation of fileapi is done on IO thread. The gap is 8 // filled by FileSystemProxy. 9 // Also, the order of arguments for the functions which take FileSystemInterface 10 // at the last is intentional. The instance of FileSystemInterface should be 11 // accessible only on UI thread, but arguments are passed on IO thread. 12 // So, here is an intended use case: 13 // 1) Bind arguments on IO thread. Then a callback instance whose type is 14 // Callback<void(FileSysstemInterface*)> is created. 15 // 2) Post the task to the UI thread. 16 // 3) On UI thread, check if the instance of FileSystemInterface is alive or 17 // not. If yes, Run the callback with it. 18 19 #ifndef CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_WORKER_H_ 20 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_WORKER_H_ 21 22 #include <vector> 23 24 #include "base/basictypes.h" 25 #include "base/callback_forward.h" 26 #include "base/memory/weak_ptr.h" 27 #include "base/platform_file.h" 28 #include "chrome/browser/chromeos/drive/file_errors.h" 29 #include "webkit/common/blob/scoped_file.h" 30 31 namespace base { 32 class FilePath; 33 } // namespace base 34 35 namespace fileapi { 36 struct DirectoryEntry; 37 } // namespace fileapi 38 39 namespace drive { 40 41 class FileSystemInterface; 42 43 namespace fileapi_internal { 44 45 typedef base::Callback<FileSystemInterface*()> FileSystemGetter; 46 47 typedef base::Callback< 48 void(base::PlatformFileError result)> StatusCallback; 49 typedef base::Callback< 50 void(base::PlatformFileError result, 51 const base::PlatformFileInfo& file_info)> GetFileInfoCallback; 52 typedef base::Callback< 53 void(base::PlatformFileError result, 54 const std::vector<fileapi::DirectoryEntry>& file_list, 55 bool has_more)> ReadDirectoryCallback; 56 typedef base::Callback< 57 void(base::PlatformFileError result, 58 const base::PlatformFileInfo& file_info, 59 const base::FilePath& snapshot_file_path, 60 webkit_blob::ScopedFile::ScopeOutPolicy scope_out_policy)> 61 CreateSnapshotFileCallback; 62 typedef base::Callback< 63 void(base::PlatformFileError result, 64 const base::FilePath& snapshot_file_path, 65 const base::Closure& close_callback)> 66 CreateWritableSnapshotFileCallback; 67 typedef base::Callback< 68 void(base::PlatformFileError result, 69 base::PlatformFile platform_file, 70 const base::Closure& close_callback)> OpenFileCallback; 71 72 // Runs |file_system_getter| to obtain the instance of FileSystemInstance, 73 // and then runs |callback| with it. 74 // If |file_system_getter| returns NULL, runs |error_callback| instead. 75 // This function must be called on UI thread. 76 // |file_system_getter| and |callback| must not be null, but 77 // |error_callback| can be null (if no operation is necessary for error 78 // case). 79 void RunFileSystemCallback( 80 const FileSystemGetter& file_system_getter, 81 const base::Callback<void(FileSystemInterface*)>& callback, 82 const base::Closure& error_callback); 83 84 // Returns the metadata info of the file at |file_path|. 85 // Called from FileSystemProxy::GetFileInfo(). 86 void GetFileInfo(const base::FilePath& file_path, 87 const GetFileInfoCallback& callback, 88 FileSystemInterface* file_system); 89 90 // Copies a file from |src_file_path| to |dest_file_path|. 91 // Called from FileSystemProxy::Copy(). 92 void Copy(const base::FilePath& src_file_path, 93 const base::FilePath& dest_file_path, 94 const StatusCallback& callback, 95 FileSystemInterface* file_system); 96 97 // Moves a file from |src_file_path| to |dest_file_path|. 98 // Called from FileSystemProxy::Move(). 99 void Move(const base::FilePath& src_file_path, 100 const base::FilePath& dest_file_path, 101 const StatusCallback& callback, 102 FileSystemInterface* file_system); 103 104 105 // Copies a file at |src_foreign_file_path|, which is not managed by Drive File 106 // System, to |dest_file_path|. 107 void CopyInForeignFile(const base::FilePath& src_foreign_file_path, 108 const base::FilePath& dest_file_path, 109 const StatusCallback& callback, 110 FileSystemInterface* file_system); 111 112 // Reads the contents of the directory at |file_path|. 113 // Called from FileSystemProxy::ReadDirectory(). 114 void ReadDirectory(const base::FilePath& file_path, 115 const ReadDirectoryCallback& callback, 116 FileSystemInterface* file_system); 117 118 // Removes a file at |file_path|. Called from FileSystemProxy::Remove(). 119 void Remove(const base::FilePath& file_path, 120 bool is_recursive, 121 const StatusCallback& callback, 122 FileSystemInterface* file_system); 123 124 // Creates a new directory at |file_path|. 125 // Called from FileSystemProxy::CreateDirectory(). 126 void CreateDirectory(const base::FilePath& file_path, 127 bool is_exclusive, 128 bool is_recursive, 129 const StatusCallback& callback, 130 FileSystemInterface* file_system); 131 132 // Creates a new file at |file_path|. 133 // Called from FileSystemProxy::CreateFile(). 134 void CreateFile(const base::FilePath& file_path, 135 bool is_exclusive, 136 const StatusCallback& callback, 137 FileSystemInterface* file_system); 138 139 // Truncates the file at |file_path| to |length| bytes. 140 // Called from FileSystemProxy::Truncate(). 141 void Truncate(const base::FilePath& file_path, 142 int64 length, 143 const StatusCallback& callback, 144 FileSystemInterface* file_system); 145 146 // Creates a snapshot for the file at |file_path|. 147 // Called from FileSystemProxy::CreateSnapshotFile(). 148 void CreateSnapshotFile(const base::FilePath& file_path, 149 const CreateSnapshotFileCallback& callback, 150 FileSystemInterface* file_system); 151 152 // Creates a writable snapshot for the file at |file_path|. 153 // After writing operation is done, |close_callback| must be called. 154 void CreateWritableSnapshotFile( 155 const base::FilePath& file_path, 156 const CreateWritableSnapshotFileCallback& callback, 157 FileSystemInterface* file_system); 158 159 // Opens the file at |file_path| with options |file_flags|. 160 // Called from FileSystemProxy::OpenFile. 161 void OpenFile(const base::FilePath& file_path, 162 int file_flags, 163 const OpenFileCallback& callback, 164 FileSystemInterface* file_system); 165 166 // Changes timestamp of the file at |file_path| to |last_access_time| and 167 // |last_modified_time|. Called from FileSystemProxy::TouchFile(). 168 void TouchFile(const base::FilePath& file_path, 169 const base::Time& last_access_time, 170 const base::Time& last_modified_time, 171 const StatusCallback& callback, 172 FileSystemInterface* file_system); 173 174 } // namespace fileapi_internal 175 } // namespace drive 176 177 #endif // CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_WORKER_H_ 178
