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      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_
    119