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

   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 #include "chrome/browser/chromeos/file_system_provider/operations/truncate.h"
   6
   7 #include <string>
   8
   9 #include "chrome/common/extensions/api/file_system_provider.h"
  10 #include "chrome/common/extensions/api/file_system_provider_internal.h"
  11
  12 namespace chromeos {
  13 namespace file_system_provider {
  14 namespace operations {
  15
  16 Truncate::Truncate(extensions::EventRouter* event_router,
  17                    const ProvidedFileSystemInfo& file_system_info,
  18                    const base::FilePath& file_path,
  19                    int64 length,
  20                    const storage::AsyncFileUtil::StatusCallback& callback)
  21     : Operation(event_router, file_system_info),
  22       file_path_(file_path),
  23       length_(length),
  24       callback_(callback) {
  25 }
  26
  27 Truncate::~Truncate() {
  28 }
  29
  30 bool Truncate::Execute(int request_id) {
  31   using extensions::api::file_system_provider::TruncateRequestedOptions;
  32
  33   if (!file_system_info_.writable())
  34     return false;
  35
  36   TruncateRequestedOptions options;
  37   options.file_system_id = file_system_info_.file_system_id();
  38   options.request_id = request_id;
  39   options.file_path = file_path_.AsUTF8Unsafe();
  40   options.length = length_;
  41
  42   return SendEvent(
  43       request_id,
  44       extensions::events::FILE_SYSTEM_PROVIDER_ON_TRUNCATE_REQUESTED,
  45       extensions::api::file_system_provider::OnTruncateRequested::kEventName,
  46       extensions::api::file_system_provider::OnTruncateRequested::Create(
  47           options));
  48 }
  49
  50 void Truncate::OnSuccess(int /* request_id */,
  51                          scoped_ptr<RequestValue> /* result */,
  52                          bool has_more) {
  53   callback_.Run(base::File::FILE_OK);
  54 }
  55
  56 void Truncate::OnError(int /* request_id */,
  57                        scoped_ptr<RequestValue> /* result */,
  58                        base::File::Error error) {
  59   callback_.Run(error);
  60 }
  61
  62 }  // namespace operations
  63 }  // namespace file_system_provider
  64 }  // namespace chromeos