webkit/fileapi/cross_operation_delegate.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_FILEAPI_CROSS_OPERATION_DELEGATE_H_
   6 #define WEBKIT_FILEAPI_CROSS_OPERATION_DELEGATE_H_
   7
   8 #include <stack>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "webkit/fileapi/recursive_operation_delegate.h"
  13
  14 namespace webkit_blob {
  15 class ShareableFileReference;
  16 }
  17
  18 namespace fileapi {
  19
  20 class CopyOrMoveFileValidator;
  21
  22 // A delegate class for recursive copy or move operations.
  23 class CrossOperationDelegate
  24     : public RecursiveOperationDelegate,
  25       public base::SupportsWeakPtr<CrossOperationDelegate> {
  26  public:
  27   enum OperationType {
  28     OPERATION_COPY,
  29     OPERATION_MOVE
  30   };
  31
  32   CrossOperationDelegate(
  33       FileSystemContext* file_system_context,
  34       scoped_ptr<LocalFileSystemOperation> src_root_operation,
  35       LocalFileSystemOperation* dest_root_operation,
  36       const FileSystemURL& src_root,
  37       const FileSystemURL& dest_root,
  38       OperationType operation_type,
  39       const StatusCallback& callback);
  40   virtual ~CrossOperationDelegate();
  41
  42   // RecursiveOperationDelegate overrides:
  43   virtual void Run() OVERRIDE;
  44   virtual void RunRecursively() OVERRIDE;
  45   virtual void ProcessFile(const FileSystemURL& url,
  46                            const StatusCallback& callback) OVERRIDE;
  47   virtual void ProcessDirectory(const FileSystemURL& url,
  48                                 const StatusCallback& callback) OVERRIDE;
  49
  50   using base::SupportsWeakPtr<CrossOperationDelegate>::AsWeakPtr;
  51
  52  private:
  53   void DidTryCopyOrMoveFile(base::PlatformFileError error);
  54   void DidTryRemoveDestRoot(base::PlatformFileError error);
  55   void CopyOrMoveFile(
  56       const FileSystemURL& src,
  57       const FileSystemURL& dest,
  58       const StatusCallback& callback);
  59   void DidCreateSnapshot(
  60       const FileSystemURL& dest,
  61       const StatusCallback& callback,
  62       base::PlatformFileError error,
  63       const base::PlatformFileInfo& file_info,
  64       const base::FilePath& platform_path,
  65       const scoped_refptr<webkit_blob::ShareableFileReference>& file_ref);
  66   void DidValidateFile(
  67       const FileSystemURL& dest,
  68       const StatusCallback& callback,
  69       const base::PlatformFileInfo& file_info,
  70       const base::FilePath& platform_path,
  71       base::PlatformFileError error);
  72   void DidFinishCopy(
  73       const FileSystemURL& src,
  74       const StatusCallback& callback,
  75       base::PlatformFileError error);
  76   void DidRemoveSourceForMove(
  77       const StatusCallback& callback,
  78       base::PlatformFileError error);
  79
  80   FileSystemURL CreateDestURL(const FileSystemURL& src_url) const;
  81
  82   // Create nested operations for recursive task.
  83   // When the creation fails it fires callback_ with the
  84   // error code and returns NULL.
  85   //
  86   // - NewDestOperation is basically a thin wrapper of
  87   //   RecursiveOperationDelegate::NewOperation().
  88   // - NewSourceOperation also redirects the request to
  89   //   RecursiveOperationDelegate::NewOperation() **iff** same_file_system_
  90   //   is true.
  91   //   Otherwise it's for cross-filesystem operation and it needs a
  92   //   separate FileSystemOperationContext, so it creates a new operation
  93   //   which inherits context from src_root_operation_.
  94   //
  95   LocalFileSystemOperation* NewDestOperation();
  96   LocalFileSystemOperation* NewSourceOperation();
  97
  98   FileSystemURL src_root_;
  99   FileSystemURL dest_root_;
 100   bool same_file_system_;
 101   OperationType operation_type_;
 102   StatusCallback callback_;
 103
 104   scoped_ptr<LocalFileSystemOperation> src_root_operation_;
 105
 106   scoped_refptr<webkit_blob::ShareableFileReference> current_file_ref_;
 107
 108   scoped_ptr<CopyOrMoveFileValidator> validator_;
 109
 110   DISALLOW_COPY_AND_ASSIGN(CrossOperationDelegate);
 111 };
 112
 113 }  // namespace fileapi
 114
 115 #endif  // WEBKIT_FILEAPI_CROSS_OPERATION_DELEGATE_H_