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. 4 5#ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_TRUNCATE_H_ 6#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_TRUNCATE_H_ 7 8#include "base/files/file.h" 9#include "base/memory/scoped_ptr.h" 10#include "chrome/browser/chromeos/file_system_provider/operations/operation.h" 11#include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h" 12#include "chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h" 13#include "chrome/browser/chromeos/file_system_provider/request_value.h" 14#include "storage/browser/fileapi/async_file_util.h" 15 16namespace base { 17class FilePath; 18} // namespace base 19 20namespace extensions { 21class EventRouter; 22} // namespace extensions 23 24namespace chromeos { 25namespace file_system_provider { 26namespace operations { 27 28// Creates a file. If the file already exists, then the operation will fail with 29// the FILE_ERROR_EXISTS error. Created per request. 30class Truncate : public Operation { 31 public: 32 Truncate(extensions::EventRouter* event_router, 33 const ProvidedFileSystemInfo& file_system_info, 34 const base::FilePath& file_path, 35 int64 length, 36 const storage::AsyncFileUtil::StatusCallback& callback); 37 virtual ~Truncate(); 38 39 // Operation overrides. 40 virtual bool Execute(int request_id) OVERRIDE; 41 virtual void OnSuccess(int request_id, 42 scoped_ptr<RequestValue> result, 43 bool has_more) OVERRIDE; 44 virtual void OnError(int request_id, 45 scoped_ptr<RequestValue> result, 46 base::File::Error error) OVERRIDE; 47 48 private: 49 base::FilePath file_path_; 50 int64 length_; 51 const storage::AsyncFileUtil::StatusCallback callback_; 52 53 DISALLOW_COPY_AND_ASSIGN(Truncate); 54}; 55 56} // namespace operations 57} // namespace file_system_provider 58} // namespace chromeos 59 60#endif // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_TRUNCATE_H_ 61