chrome/browser/media_galleries/linux/mtp_device_object_enumerator.cc

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