webkit/browser/fileapi/async_file_util_adapter.h

   1 // Copyright (c) 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 WEBKIT_BROWSER_FILEAPI_ASYNC_FILE_UTIL_ADAPTER_H_
   6 #define WEBKIT_BROWSER_FILEAPI_ASYNC_FILE_UTIL_ADAPTER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "webkit/browser/fileapi/async_file_util.h"
  10
  11 namespace fileapi {
  12
  13 class FileSystemFileUtil;
  14
  15 // An adapter class for FileSystemFileUtil classes to provide asynchronous
  16 // interface.
  17 //
  18 // A filesystem can do either:
  19 // - implement a synchronous version of FileUtil by extending
  20 //   FileSystemFileUtil and atach it to this adapter, or
  21 // - directly implement AsyncFileUtil.
  22 //
  23 // This instance (as thus this->sync_file_util_) is guaranteed to be alive
  24 // as far as FileSystemOperationContext given to each operation is kept alive.
  25 class WEBKIT_STORAGE_BROWSER_EXPORT AsyncFileUtilAdapter
  26     : public NON_EXPORTED_BASE(AsyncFileUtil) {
  27  public:
  28   // Creates a new AsyncFileUtil for |sync_file_util|. This takes the
  29   // ownership of |sync_file_util|. (This doesn't take scoped_ptr<> just
  30   // to save extra make_scoped_ptr; in all use cases a new fresh FileUtil is
  31   // created only for this adapter.)
  32   explicit AsyncFileUtilAdapter(FileSystemFileUtil* sync_file_util);
  33
  34   virtual ~AsyncFileUtilAdapter();
  35
  36   FileSystemFileUtil* sync_file_util() {
  37     return sync_file_util_.get();
  38   }
  39
  40   // AsyncFileUtil overrides.
  41   virtual void CreateOrOpen(
  42       scoped_ptr<FileSystemOperationContext> context,
  43       const FileSystemURL& url,
  44       int file_flags,
  45       const CreateOrOpenCallback& callback) OVERRIDE;
  46   virtual void EnsureFileExists(
  47       scoped_ptr<FileSystemOperationContext> context,
  48       const FileSystemURL& url,
  49       const EnsureFileExistsCallback& callback) OVERRIDE;
  50   virtual void CreateDirectory(
  51       scoped_ptr<FileSystemOperationContext> context,
  52       const FileSystemURL& url,
  53       bool exclusive,
  54       bool recursive,
  55       const StatusCallback& callback) OVERRIDE;
  56   virtual void GetFileInfo(
  57       scoped_ptr<FileSystemOperationContext> context,
  58       const FileSystemURL& url,
  59       const GetFileInfoCallback& callback) OVERRIDE;
  60   virtual void ReadDirectory(
  61       scoped_ptr<FileSystemOperationContext> context,
  62       const FileSystemURL& url,
  63       const ReadDirectoryCallback& callback) OVERRIDE;
  64   virtual void Touch(
  65       scoped_ptr<FileSystemOperationContext> context,
  66       const FileSystemURL& url,
  67       const base::Time& last_access_time,
  68       const base::Time& last_modified_time,
  69       const StatusCallback& callback) OVERRIDE;
  70   virtual void Truncate(
  71       scoped_ptr<FileSystemOperationContext> context,
  72       const FileSystemURL& url,
  73       int64 length,
  74       const StatusCallback& callback) OVERRIDE;
  75   virtual void CopyFileLocal(
  76       scoped_ptr<FileSystemOperationContext> context,
  77       const FileSystemURL& src_url,
  78       const FileSystemURL& dest_url,
  79       CopyOrMoveOption option,
  80       const CopyFileProgressCallback& progress_callback,
  81       const StatusCallback& callback) OVERRIDE;
  82   virtual void MoveFileLocal(
  83       scoped_ptr<FileSystemOperationContext> context,
  84       const FileSystemURL& src_url,
  85       const FileSystemURL& dest_url,
  86       CopyOrMoveOption option,
  87       const StatusCallback& callback) OVERRIDE;
  88   virtual void CopyInForeignFile(
  89       scoped_ptr<FileSystemOperationContext> context,
  90       const base::FilePath& src_file_path,
  91       const FileSystemURL& dest_url,
  92       const StatusCallback& callback) OVERRIDE;
  93   virtual void DeleteFile(
  94       scoped_ptr<FileSystemOperationContext> context,
  95       const FileSystemURL& url,
  96       const StatusCallback& callback) OVERRIDE;
  97   virtual void DeleteDirectory(
  98       scoped_ptr<FileSystemOperationContext> context,
  99       const FileSystemURL& url,
 100       const StatusCallback& callback) OVERRIDE;
 101   virtual void DeleteRecursively(
 102       scoped_ptr<FileSystemOperationContext> context,
 103       const FileSystemURL& url,
 104       const StatusCallback& callback) OVERRIDE;
 105   virtual void CreateSnapshotFile(
 106       scoped_ptr<FileSystemOperationContext> context,
 107       const FileSystemURL& url,
 108       const CreateSnapshotFileCallback& callback) OVERRIDE;
 109
 110  private:
 111   scoped_ptr<FileSystemFileUtil> sync_file_util_;
 112
 113   DISALLOW_COPY_AND_ASSIGN(AsyncFileUtilAdapter);
 114 };
 115
 116 }  // namespace fileapi
 117
 118 #endif  // WEBKIT_BROWSER_FILEAPI_ASYNC_FILE_UTIL_ADAPTER_H_