chrome/browser/chromeos/file_system_provider/operations/truncate.h

   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
  16 namespace base {
  17 class FilePath;
  18 }  // namespace base
  19
  20 namespace extensions {
  21 class EventRouter;
  22 }  // namespace extensions
  23
  24 namespace chromeos {
  25 namespace file_system_provider {
  26 namespace 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.
  30 class 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   ~Truncate() override;
  38
  39   // Operation overrides.
  40   bool Execute(int request_id) override;
  41   void OnSuccess(int request_id,
  42                  scoped_ptr<RequestValue> result,
  43                  bool has_more) override;
  44   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_