mtp_device_object_enumerator.cc revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
1// Copyright (c) 2012 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/media_galleries/linux/mtp_device_object_enumerator.h"
6
7#include "base/logging.h"
8
9namespace chrome {
10
11MTPDeviceObjectEnumerator::MTPDeviceObjectEnumerator(
12    const std::vector<MtpFileEntry>& entries)
13    : file_entries_(entries),
14      index_(0U),
15      is_index_ready_(false) {
16}
17
18MTPDeviceObjectEnumerator::~MTPDeviceObjectEnumerator() {
19}
20
21base::FilePath MTPDeviceObjectEnumerator::Next() {
22  if (IsIndexReadyAndInRange())
23    ++index_;  // Normal traversal.
24  else if (!is_index_ready_)
25    is_index_ready_ = true;  // First time calling Next().
26
27  if (!HasMoreEntries())
28    return base::FilePath();
29  return base::FilePath(file_entries_[index_].file_name());
30}
31
32int64 MTPDeviceObjectEnumerator::Size() {
33  if (!IsIndexReadyAndInRange())
34    return 0;
35  return file_entries_[index_].file_size();
36}
37
38bool MTPDeviceObjectEnumerator::IsDirectory() {
39  if (!IsIndexReadyAndInRange())
40    return false;
41  return file_entries_[index_].file_type() == MtpFileEntry::FILE_TYPE_FOLDER;
42}
43
44base::Time MTPDeviceObjectEnumerator::LastModifiedTime() {
45  if (!IsIndexReadyAndInRange())
46    return base::Time();
47  return base::Time::FromTimeT(file_entries_[index_].modification_time());
48}
49
50bool MTPDeviceObjectEnumerator::GetEntryId(uint32_t* entry_id) const {
51  DCHECK(entry_id);
52  if (!IsIndexReadyAndInRange())
53    return false;
54
55  *entry_id = file_entries_[index_].item_id();
56  return true;
57}
58
59bool MTPDeviceObjectEnumerator::HasMoreEntries() const {
60  return index_ < file_entries_.size();
61}
62
63bool MTPDeviceObjectEnumerator::IsIndexReadyAndInRange() const {
64  return is_index_ready_ && HasMoreEntries();
65}
66
67}  // namespace chrome
68