1 // Copyright (c) 2013 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 // MTPDeviceObjectEnumerator implementation.
7 #include "chrome/browser/media_galleries/win/mtp_device_object_enumerator.h"
9 #include "base/logging.h"
10 #include "base/threading/thread_restrictions.h"
12 MTPDeviceObjectEnumerator::MTPDeviceObjectEnumerator(
13 const MTPDeviceObjectEntries
& entries
)
14 : object_entries_(entries
),
16 is_index_ready_(false) {
17 base::ThreadRestrictions::AssertIOAllowed();
20 MTPDeviceObjectEnumerator::~MTPDeviceObjectEnumerator() {
21 DCHECK(thread_checker_
.CalledOnValidThread());
24 base::FilePath
MTPDeviceObjectEnumerator::Next() {
25 DCHECK(thread_checker_
.CalledOnValidThread());
26 if (IsIndexReadyAndInRange())
27 ++index_
; // Normal traversal.
28 else if (!is_index_ready_
)
29 is_index_ready_
= true; // First time calling Next().
31 if (!HasMoreEntries())
32 return base::FilePath();
33 return base::FilePath(object_entries_
[index_
].name
);
36 int64
MTPDeviceObjectEnumerator::Size() {
37 DCHECK(thread_checker_
.CalledOnValidThread());
38 if (!IsIndexReadyAndInRange())
40 return object_entries_
[index_
].size
;
43 bool MTPDeviceObjectEnumerator::IsDirectory() {
44 DCHECK(thread_checker_
.CalledOnValidThread());
45 if (!IsIndexReadyAndInRange())
47 return object_entries_
[index_
].is_directory
;
50 base::Time
MTPDeviceObjectEnumerator::LastModifiedTime() {
51 DCHECK(thread_checker_
.CalledOnValidThread());
52 if (!IsIndexReadyAndInRange())
54 return object_entries_
[index_
].last_modified_time
;
57 base::string16
MTPDeviceObjectEnumerator::GetObjectId() const {
58 DCHECK(thread_checker_
.CalledOnValidThread());
59 if (!IsIndexReadyAndInRange())
60 return base::string16();
61 return object_entries_
[index_
].object_id
;
64 bool MTPDeviceObjectEnumerator::HasMoreEntries() const {
65 return index_
< object_entries_
.size();
68 bool MTPDeviceObjectEnumerator::IsIndexReadyAndInRange() const {
69 return is_index_ready_
&& HasMoreEntries();