Rename webkit_blob::FileReader to FileStreamReader.

The name was confusion: it does not directly correspond to FileReader in File API, (which is implemented by WebCore::FileReader).

BUG=128483
TEST=Existing file/blob tests.


Review URL: https://chromiumcodereview.appspot.com/10447083

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@139724 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 68 insertions, 0 deletions

diff --git a/webkit/fileapi/file_system_file_stream_reader.h b/webkit/fileapi/file_system_file_stream_reader.h
new file mode 100644
index 0000000..f7727ad
--- /dev/null
+++ b/webkit/fileapi/file_system_file_stream_reader.h
@@ -0,0 +1,68 @@
+// 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_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_
+#define WEBKIT_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_
+#pragma once
+
+#include "base/bind.h"
+#include "base/memory/ref_counted.h"
+#include "base/platform_file.h"
+#include "googleurl/src/gurl.h"
+#include "webkit/blob/file_stream_reader.h"
+
+class FilePath;
+
+namespace base {
+class SequencedTaskRunner;
+}
+
+namespace webkit_blob {
+class LocalFileStreamReader;
+class ShareableFileReference;
+}
+
+namespace fileapi {
+
+class FileSystemContext;
+
+// TODO(kinaba,satorux): 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 FileSystemFileStreamReader : public webkit_blob::FileStreamReader {
+ public:
+  // Creates a new FileReader for a filesystem URL |url| form |initial_offset|.
+  FileSystemFileStreamReader(FileSystemContext* file_system_context,
+                             const GURL& url,
+                             int64 initial_offset);
+  virtual ~FileSystemFileStreamReader();
+
+  // FileReader override.
+  virtual int Read(net::IOBuffer* buf, int buf_len,
+                   const net::CompletionCallback& callback) OVERRIDE;
+
+ private:
+  void DidCreateSnapshot(
+      const base::Closure& read_closure,
+      const net::CompletionCallback& callback,
+      base::PlatformFileError file_error,
+      const base::PlatformFileInfo& file_info,
+      const FilePath& platform_path,
+      const scoped_refptr<webkit_blob::ShareableFileReference>& file_ref);
+
+  scoped_refptr<FileSystemContext> file_system_context_;
+  const GURL url_;
+  const int64 initial_offset_;
+  scoped_ptr<webkit_blob::LocalFileStreamReader> 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_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_