storage/browser/fileapi/sandbox_file_stream_writer.h

   1 // Copyright (c) 2012 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 STORAGE_BROWSER_FILEAPI_SANDBOX_FILE_STREAM_WRITER_H_
   6 #define STORAGE_BROWSER_FILEAPI_SANDBOX_FILE_STREAM_WRITER_H_
   7
   8 #include "base/files/file.h"
   9 #include "base/files/file_path.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "storage/browser/fileapi/file_stream_writer.h"
  12 #include "storage/browser/fileapi/file_system_url.h"
  13 #include "storage/browser/fileapi/task_runner_bound_observer_list.h"
  14 #include "storage/browser/storage_browser_export.h"
  15 #include "storage/common/blob/shareable_file_reference.h"
  16 #include "storage/common/fileapi/file_system_types.h"
  17 #include "storage/common/quota/quota_types.h"
  18 #include "url/gurl.h"
  19
  20 namespace storage {
  21
  22 class FileSystemContext;
  23 class FileSystemQuotaUtil;
  24 class FileStreamWriter;
  25
  26 class STORAGE_EXPORT_PRIVATE SandboxFileStreamWriter
  27     : public NON_EXPORTED_BASE(FileStreamWriter) {
  28  public:
  29   SandboxFileStreamWriter(FileSystemContext* file_system_context,
  30                           const FileSystemURL& url,
  31                           int64 initial_offset,
  32                           const UpdateObserverList& observers);
  33   virtual ~SandboxFileStreamWriter();
  34
  35   // FileStreamWriter overrides.
  36   virtual int Write(net::IOBuffer* buf, int buf_len,
  37                     const net::CompletionCallback& callback) OVERRIDE;
  38   virtual int Cancel(const net::CompletionCallback& callback) OVERRIDE;
  39   virtual int Flush(const net::CompletionCallback& callback) OVERRIDE;
  40
  41   // Used only by tests.
  42   void set_default_quota(int64 quota) {
  43     default_quota_ = quota;
  44   }
  45
  46  private:
  47   // Performs quota calculation and calls local_file_writer_->Write().
  48   int WriteInternal(net::IOBuffer* buf, int buf_len,
  49                     const net::CompletionCallback& callback);
  50
  51   // Callbacks that are chained for the first write.  This eventually calls
  52   // WriteInternal.
  53   void DidCreateSnapshotFile(
  54       const net::CompletionCallback& callback,
  55       base::File::Error file_error,
  56       const base::File::Info& file_info,
  57       const base::FilePath& platform_path,
  58       const scoped_refptr<storage::ShareableFileReference>& file_ref);
  59   void DidGetUsageAndQuota(const net::CompletionCallback& callback,
  60                            storage::QuotaStatusCode status,
  61                            int64 usage,
  62                            int64 quota);
  63   void DidInitializeForWrite(net::IOBuffer* buf, int buf_len,
  64                              const net::CompletionCallback& callback,
  65                              int init_status);
  66
  67   void DidWrite(const net::CompletionCallback& callback, int write_response);
  68
  69   // Stops the in-flight operation, calls |cancel_callback_| and returns true
  70   // if there's a pending cancel request.
  71   bool CancelIfRequested();
  72
  73   scoped_refptr<FileSystemContext> file_system_context_;
  74   FileSystemURL url_;
  75   int64 initial_offset_;
  76   scoped_ptr<FileStreamWriter> local_file_writer_;
  77   net::CompletionCallback cancel_callback_;
  78
  79   UpdateObserverList observers_;
  80
  81   base::FilePath file_path_;
  82   int64 file_size_;
  83   int64 total_bytes_written_;
  84   int64 allowed_bytes_to_write_;
  85   bool has_pending_operation_;
  86
  87   int64 default_quota_;
  88
  89   base::WeakPtrFactory<SandboxFileStreamWriter> weak_factory_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(SandboxFileStreamWriter);
  92 };
  93
  94 }  // namespace storage
  95
  96 #endif  // STORAGE_BROWSER_FILEAPI_SANDBOX_FILE_STREAM_WRITER_H_