Merge Chromium + Blink git repositories
[chromium-blink-merge.git] / chrome / browser / chromeos / file_system_provider / operations / read_file.h
blobb04e9b436c0f26e43a8d1f2563c90f5cc9aea2a2
1 // Copyright 2014 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.
5 #ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_READ_FILE_H_
6 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_READ_FILE_H_
8 #include "base/files/file.h"
9 #include "base/memory/ref_counted.h"
10 #include "base/memory/scoped_ptr.h"
11 #include "chrome/browser/chromeos/file_system_provider/operations/operation.h"
12 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
13 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h"
14 #include "chrome/browser/chromeos/file_system_provider/request_value.h"
15 #include "net/base/io_buffer.h"
16 #include "storage/browser/fileapi/async_file_util.h"
18 namespace base {
19 class FilePath;
20 } // namespace base
22 namespace extensions {
23 class EventRouter;
24 } // namespace extensions
26 namespace chromeos {
27 namespace file_system_provider {
28 namespace operations {
30 // Bridge between fileapi read file and providing extension's read fil request.
31 // Created per request.
32 class ReadFile : public Operation {
33 public:
34 ReadFile(
35 extensions::EventRouter* event_router,
36 const ProvidedFileSystemInfo& file_system_info,
37 int file_handle,
38 scoped_refptr<net::IOBuffer> buffer,
39 int64 offset,
40 int length,
41 const ProvidedFileSystemInterface::ReadChunkReceivedCallback& callback);
42 ~ReadFile() override;
44 // Operation overrides.
45 bool Execute(int request_id) override;
46 void OnSuccess(int request_id,
47 scoped_ptr<RequestValue> result,
48 bool has_more) override;
49 void OnError(int request_id,
50 scoped_ptr<RequestValue> result,
51 base::File::Error error) override;
53 private:
54 int file_handle_;
55 scoped_refptr<net::IOBuffer> buffer_;
56 int64 offset_;
57 int length_;
58 int64 current_offset_;
59 const ProvidedFileSystemInterface::ReadChunkReceivedCallback callback_;
61 DISALLOW_COPY_AND_ASSIGN(ReadFile);
64 } // namespace operations
65 } // namespace file_system_provider
66 } // namespace chromeos
68 #endif // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_READ_FILE_H_