extensions/browser/api/system_storage/storage_info_provider.cc

   1 // Copyright 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.
   4
   5 #include "extensions/browser/api/system_storage/storage_info_provider.h"
   6
   7 #include "base/stl_util.h"
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "base/sys_info.h"
  10 #include "base/threading/sequenced_worker_pool.h"
  11 #include "components/storage_monitor/storage_info.h"
  12 #include "components/storage_monitor/storage_monitor.h"
  13 #include "content/public/browser/browser_thread.h"
  14
  15 using storage_monitor::StorageInfo;
  16 using storage_monitor::StorageMonitor;
  17
  18 namespace extensions {
  19
  20 using content::BrowserThread;
  21 using api::system_storage::StorageUnitInfo;
  22 using api::system_storage::STORAGE_UNIT_TYPE_FIXED;
  23 using api::system_storage::STORAGE_UNIT_TYPE_REMOVABLE;
  24
  25 namespace systeminfo {
  26
  27 void BuildStorageUnitInfo(const StorageInfo& info, StorageUnitInfo* unit) {
  28   unit->id = StorageMonitor::GetInstance()->GetTransientIdForDeviceId(
  29       info.device_id());
  30   unit->name = base::UTF16ToUTF8(info.GetDisplayName(false));
  31   // TODO(hmin): Might need to take MTP device into consideration.
  32   unit->type = StorageInfo::IsRemovableDevice(info.device_id())
  33                    ? STORAGE_UNIT_TYPE_REMOVABLE
  34                    : STORAGE_UNIT_TYPE_FIXED;
  35   unit->capacity = static_cast<double>(info.total_size_in_bytes());
  36 }
  37
  38 }  // namespace systeminfo
  39
  40 // Static member intialization.
  41 base::LazyInstance<scoped_refptr<StorageInfoProvider> >
  42     StorageInfoProvider::provider_ = LAZY_INSTANCE_INITIALIZER;
  43
  44 StorageInfoProvider::StorageInfoProvider() {
  45 }
  46
  47 StorageInfoProvider::~StorageInfoProvider() {
  48 }
  49
  50 const StorageUnitInfoList& StorageInfoProvider::storage_unit_info_list() const {
  51   return info_;
  52 }
  53
  54 void StorageInfoProvider::InitializeForTesting(
  55     scoped_refptr<StorageInfoProvider> provider) {
  56   DCHECK(provider.get() != NULL);
  57   provider_.Get() = provider;
  58 }
  59
  60 void StorageInfoProvider::PrepareQueryOnUIThread() {
  61   // Get all available storage devices before invoking |QueryInfo()|.
  62   GetAllStoragesIntoInfoList();
  63 }
  64
  65 void StorageInfoProvider::InitializeProvider(
  66     const base::Closure& do_query_info_callback) {
  67   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  68   // Register the |do_query_info_callback| callback to StorageMonitor.
  69   // See the comments of StorageMonitor::EnsureInitialized about when the
  70   // callback gets run.
  71   StorageMonitor::GetInstance()->EnsureInitialized(do_query_info_callback);
  72 }
  73
  74 bool StorageInfoProvider::QueryInfo() {
  75   DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
  76   // No info to query since we get all available storage devices' info in
  77   // |PrepareQueryOnUIThread()|.
  78   return true;
  79 }
  80
  81 void StorageInfoProvider::GetAllStoragesIntoInfoList() {
  82   info_.clear();
  83   std::vector<StorageInfo> storage_list =
  84       StorageMonitor::GetInstance()->GetAllAvailableStorages();
  85
  86   for (std::vector<StorageInfo>::const_iterator it = storage_list.begin();
  87        it != storage_list.end();
  88        ++it) {
  89     linked_ptr<StorageUnitInfo> unit(new StorageUnitInfo());
  90     systeminfo::BuildStorageUnitInfo(*it, unit.get());
  91     info_.push_back(unit);
  92   }
  93 }
  94
  95 double StorageInfoProvider::GetStorageFreeSpaceFromTransientIdOnFileThread(
  96     const std::string& transient_id) {
  97   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
  98   std::vector<StorageInfo> storage_list =
  99       StorageMonitor::GetInstance()->GetAllAvailableStorages();
 100
 101   std::string device_id =
 102       StorageMonitor::GetInstance()->GetDeviceIdForTransientId(transient_id);
 103
 104   // Lookup the matched storage info by |device_id|.
 105   for (std::vector<StorageInfo>::const_iterator it = storage_list.begin();
 106        it != storage_list.end();
 107        ++it) {
 108     if (device_id == it->device_id())
 109       return static_cast<double>(
 110           base::SysInfo::AmountOfFreeDiskSpace(base::FilePath(it->location())));
 111   }
 112
 113   return -1;
 114 }
 115
 116 // static
 117 StorageInfoProvider* StorageInfoProvider::Get() {
 118   if (provider_.Get().get() == NULL)
 119     provider_.Get() = new StorageInfoProvider();
 120   return provider_.Get().get();
 121 }
 122
 123 }  // namespace extensions