| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_ |
| #define WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_ |
| |
| #include "base/bind.h" |
| #include "base/files/file.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/time/time.h" |
| #include "webkit/browser/blob/file_stream_reader.h" |
| #include "webkit/browser/fileapi/file_system_url.h" |
| #include "webkit/browser/webkit_storage_browser_export.h" |
| #include "webkit/common/blob/shareable_file_reference.h" |
| |
| namespace base { |
| class FilePath; |
| class SequencedTaskRunner; |
| } |
| |
| namespace content { |
| class FileSystemFileStreamReaderTest; |
| } |
| |
| namespace fileapi { |
| |
| class FileSystemContext; |
| |
| // Generic FileStreamReader implementation for FileSystem files. |
| // Note: This generic implementation would work for any filesystems but |
| // remote filesystem should implement its own reader rather than relying |
| // on FileSystemOperation::GetSnapshotFile() which may force downloading |
| // the entire contents for remote files. |
| class WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE FileSystemFileStreamReader |
| : public NON_EXPORTED_BASE(webkit_blob::FileStreamReader) { |
| public: |
| virtual ~FileSystemFileStreamReader(); |
| |
| // FileStreamReader overrides. |
| virtual int Read(net::IOBuffer* buf, int buf_len, |
| const net::CompletionCallback& callback) OVERRIDE; |
| virtual int64 GetLength( |
| const net::Int64CompletionCallback& callback) OVERRIDE; |
| |
| private: |
| friend class webkit_blob::FileStreamReader; |
| friend class content::FileSystemFileStreamReaderTest; |
| |
| FileSystemFileStreamReader(FileSystemContext* file_system_context, |
| const FileSystemURL& url, |
| int64 initial_offset, |
| const base::Time& expected_modification_time); |
| |
| int CreateSnapshot(const base::Closure& callback, |
| const net::CompletionCallback& error_callback); |
| void DidCreateSnapshot( |
| const base::Closure& callback, |
| const net::CompletionCallback& error_callback, |
| base::File::Error file_error, |
| const base::File::Info& file_info, |
| const base::FilePath& platform_path, |
| const scoped_refptr<webkit_blob::ShareableFileReference>& file_ref); |
| |
| scoped_refptr<FileSystemContext> file_system_context_; |
| FileSystemURL url_; |
| const int64 initial_offset_; |
| const base::Time expected_modification_time_; |
| scoped_ptr<webkit_blob::FileStreamReader> local_file_reader_; |
| scoped_refptr<webkit_blob::ShareableFileReference> snapshot_ref_; |
| bool has_pending_create_snapshot_; |
| base::WeakPtrFactory<FileSystemFileStreamReader> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(FileSystemFileStreamReader); |
| }; |
| |
| } // namespace fileapi |
| |
| #endif // WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_ |