// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Any tasks that communicates with the portable device may take >100ms to
// complete. Those tasks should be run on an blocking thread instead of the
// UI thread.
#include "components/storage_monitor/portable_device_watcher_win.h"
#include <objbase.h>
#include <dbt.h>
#include <portabledevice.h>
#include <wrl/client.h>
#include "base/containers/contains.h"
#include "base/containers/heap_array.h"
#include "base/files/file_path.h"
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/not_fatal_until.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/thread_pool.h"
#include "base/threading/scoped_blocking_call.h"
#include "base/win/scoped_co_mem.h"
#include "base/win/scoped_propvariant.h"
#include "components/storage_monitor/removable_device_constants.h"
#include "components/storage_monitor/storage_info.h"
#include "content/public/browser/browser_thread.h"
namespace storage_monitor {
namespace {
// Name of the client application that communicates with the MTP device.
const wchar_t kClientName[] = L"Chromium";
// Returns true if |data| represents a class of portable devices.
bool IsPortableDeviceStructure(LPARAM data) {
DEV_BROADCAST_HDR* broadcast_hdr =
reinterpret_cast<DEV_BROADCAST_HDR*>(data);
if (!broadcast_hdr ||
(broadcast_hdr->dbch_devicetype != DBT_DEVTYP_DEVICEINTERFACE)) {
return false;
}
GUID guidDevInterface = GUID_NULL;
if (FAILED(CLSIDFromString(kWPDDevInterfaceGUID, &guidDevInterface)))
return false;
DEV_BROADCAST_DEVICEINTERFACE* dev_interface =
reinterpret_cast<DEV_BROADCAST_DEVICEINTERFACE*>(data);
return (IsEqualGUID(dev_interface->dbcc_classguid, guidDevInterface) != 0);
}
// Returns the portable device plug and play device ID string.
std::wstring GetPnpDeviceId(LPARAM data) {
DEV_BROADCAST_DEVICEINTERFACE* dev_interface =
reinterpret_cast<DEV_BROADCAST_DEVICEINTERFACE*>(data);
if (!dev_interface)
return std::wstring();
std::wstring device_id(dev_interface->dbcc_name);
DCHECK(base::IsStringASCII(device_id));
return base::ToLowerASCII(device_id);
}
// Gets the friendly name of the device specified by the |pnp_device_id|. On
// success, returns true and fills in |name|.
bool GetFriendlyName(const std::wstring& pnp_device_id,
IPortableDeviceManager* device_manager,
std::wstring* name) {
DCHECK(device_manager);
DCHECK(name);
DWORD name_len = 0;
HRESULT hr = device_manager->GetDeviceFriendlyName(pnp_device_id.c_str(),
nullptr, &name_len);
if (FAILED(hr))
return false;
hr = device_manager->GetDeviceFriendlyName(
pnp_device_id.c_str(), base::WriteInto(name, name_len), &name_len);
return (SUCCEEDED(hr) && !name->empty());
}
// Gets the manufacturer name of the device specified by the |pnp_device_id|.
// On success, returns true and fills in |name|.
bool GetManufacturerName(const std::wstring& pnp_device_id,
IPortableDeviceManager* device_manager,
std::wstring* name) {
DCHECK(device_manager);
DCHECK(name);
DWORD name_len = 0;
HRESULT hr = device_manager->GetDeviceManufacturer(pnp_device_id.c_str(),
nullptr, &name_len);
if (FAILED(hr))
return false;
hr = device_manager->GetDeviceManufacturer(pnp_device_id.c_str(),
base::WriteInto(name, name_len),
&name_len);
return (SUCCEEDED(hr) && !name->empty());
}
// Gets the description of the device specified by the |pnp_device_id|. On
// success, returns true and fills in |description|.
bool GetDeviceDescription(const std::wstring& pnp_device_id,
IPortableDeviceManager* device_manager,
std::wstring* description) {
DCHECK(device_manager);
DCHECK(description);
DWORD desc_len = 0;
HRESULT hr = device_manager->GetDeviceDescription(pnp_device_id.c_str(),
nullptr, &desc_len);
if (FAILED(hr))
return false;
hr = device_manager->GetDeviceDescription(
pnp_device_id.c_str(), base::WriteInto(description, desc_len), &desc_len);
return (SUCCEEDED(hr) && !description->empty());
}
// On success, returns true and updates |client_info| with a reference to an
// IPortableDeviceValues interface that holds information about the
// application that communicates with the device.
bool GetClientInformation(
Microsoft::WRL::ComPtr<IPortableDeviceValues>* client_info) {
HRESULT hr =
::CoCreateInstance(__uuidof(PortableDeviceValues), nullptr,
CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&(*client_info)));
if (FAILED(hr)) {
DPLOG(ERROR) << "Failed to create an instance of IPortableDeviceValues";
return false;
}
// Attempt to set client details.
(*client_info)->SetStringValue(WPD_CLIENT_NAME, kClientName);
(*client_info)->SetUnsignedIntegerValue(WPD_CLIENT_MAJOR_VERSION, 0);
(*client_info)->SetUnsignedIntegerValue(WPD_CLIENT_MINOR_VERSION, 0);
(*client_info)->SetUnsignedIntegerValue(WPD_CLIENT_REVISION, 0);
(*client_info)->SetUnsignedIntegerValue(
WPD_CLIENT_SECURITY_QUALITY_OF_SERVICE, SECURITY_IMPERSONATION);
(*client_info)->SetUnsignedIntegerValue(WPD_CLIENT_DESIRED_ACCESS,
GENERIC_READ);
return true;
}
// Opens the device for communication. |pnp_device_id| specifies the plug and
// play device ID string. On success, returns true and updates |device| with a
// reference to the portable device interface.
bool SetUp(const std::wstring& pnp_device_id,
Microsoft::WRL::ComPtr<IPortableDevice>* device) {
Microsoft::WRL::ComPtr<IPortableDeviceValues> client_info;
if (!GetClientInformation(&client_info))
return false;
HRESULT hr =
::CoCreateInstance(__uuidof(PortableDevice), nullptr,
CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&(*device)));
if (FAILED(hr)) {
DPLOG(ERROR) << "Failed to create an instance of IPortableDevice";
return false;
}
hr = (*device)->Open(pnp_device_id.c_str(), client_info.Get());
if (SUCCEEDED(hr))
return true;
if (hr == E_ACCESSDENIED)
DPLOG(ERROR) << "Access denied to open the device";
return false;
}
// Returns the unique id property key of the object specified by the
// |object_id|.
REFPROPERTYKEY GetUniqueIdPropertyKey(const std::wstring& object_id) {
return (object_id == WPD_DEVICE_OBJECT_ID) ?
WPD_DEVICE_SERIAL_NUMBER : WPD_OBJECT_PERSISTENT_UNIQUE_ID;
}
// On success, returns true and populates |properties_to_read| with the
// property key of the object specified by the |object_id|.
bool PopulatePropertyKeyCollection(
const std::wstring& object_id,
Microsoft::WRL::ComPtr<IPortableDeviceKeyCollection>* properties_to_read) {
HRESULT hr = ::CoCreateInstance(__uuidof(PortableDeviceKeyCollection),
nullptr, CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&(*properties_to_read)));
if (FAILED(hr)) {
DPLOG(ERROR) << "Failed to create IPortableDeviceKeyCollection instance";
return false;
}
REFPROPERTYKEY key = GetUniqueIdPropertyKey(object_id);
hr = (*properties_to_read)->Add(key);
return SUCCEEDED(hr);
}
// Wrapper function to get content property string value.
bool GetStringPropertyValue(IPortableDeviceValues* properties_values,
REFPROPERTYKEY key,
std::wstring* value) {
DCHECK(properties_values);
DCHECK(value);
base::win::ScopedCoMem<wchar_t> buffer;
HRESULT hr = properties_values->GetStringValue(key, &buffer);
if (FAILED(hr))
return false;
*value = static_cast<const wchar_t*>(buffer);
return true;
}
// Constructs a unique identifier for the object specified by the |object_id|.
// On success, returns true and fills in |unique_id|.
bool GetObjectUniqueId(IPortableDevice* device,
const std::wstring& object_id,
std::wstring* unique_id) {
DCHECK(device);
DCHECK(unique_id);
Microsoft::WRL::ComPtr<IPortableDeviceContent> content;
HRESULT hr = device->Content(&content);
if (FAILED(hr)) {
DPLOG(ERROR) << "Failed to get IPortableDeviceContent interface";
return false;
}
Microsoft::WRL::ComPtr<IPortableDeviceProperties> properties;
hr = content->Properties(&properties);
if (FAILED(hr)) {
DPLOG(ERROR) << "Failed to get IPortableDeviceProperties interface";
return false;
}
Microsoft::WRL::ComPtr<IPortableDeviceKeyCollection> properties_to_read;
if (!PopulatePropertyKeyCollection(object_id, &properties_to_read))
return false;
Microsoft::WRL::ComPtr<IPortableDeviceValues> properties_values;
if (FAILED(properties->GetValues(object_id.c_str(), properties_to_read.Get(),
&properties_values))) {
return false;
}
REFPROPERTYKEY key = GetUniqueIdPropertyKey(object_id);
return GetStringPropertyValue(properties_values.Get(), key, unique_id);
}
// Constructs the device storage unique identifier using |device_serial_num| and
// |storage_id|. On success, returns true and fills in |device_storage_id|.
bool ConstructDeviceStorageUniqueId(const std::wstring& device_serial_num,
const std::wstring& storage_id,
std::string* device_storage_id) {
if (device_serial_num.empty() && storage_id.empty())
return false;
DCHECK(device_storage_id);
*device_storage_id = StorageInfo::MakeDeviceId(
StorageInfo::MTP_OR_PTP,
base::WideToUTF8(storage_id + L':' + device_serial_num));
return true;
}
// Gets a list of removable storage object identifiers present in |device|.
// On success, returns true and fills in |storage_object_ids|.
bool GetRemovableStorageObjectIds(
IPortableDevice* device,
PortableDeviceWatcherWin::StorageObjectIDs* storage_object_ids) {
DCHECK(device);
DCHECK(storage_object_ids);
Microsoft::WRL::ComPtr<IPortableDeviceCapabilities> capabilities;
HRESULT hr = device->Capabilities(&capabilities);
if (FAILED(hr)) {
DPLOG(ERROR) << "Failed to get IPortableDeviceCapabilities interface";
return false;
}
Microsoft::WRL::ComPtr<IPortableDevicePropVariantCollection> storage_ids;
hr = capabilities->GetFunctionalObjects(WPD_FUNCTIONAL_CATEGORY_STORAGE,
&storage_ids);
if (FAILED(hr)) {
DPLOG(ERROR) << "Failed to get IPortableDevicePropVariantCollection";
return false;
}
DWORD num_storage_obj_ids = 0;
hr = storage_ids->GetCount(&num_storage_obj_ids);
if (FAILED(hr))
return false;
for (DWORD index = 0; index < num_storage_obj_ids; ++index) {
base::win::ScopedPropVariant object_id;
hr = storage_ids->GetAt(index, object_id.Receive());
if (SUCCEEDED(hr) && object_id.get().vt == VT_LPWSTR &&
object_id.get().pwszVal != nullptr) {
storage_object_ids->push_back(object_id.get().pwszVal);
}
}
return true;
}
// Returns true if the portable device belongs to a mass storage class.
// |pnp_device_id| specifies the plug and play device id.
// |device_name| specifies the name of the device.
bool IsMassStoragePortableDevice(const std::wstring& pnp_device_id,
const std::wstring& device_name) {
// Based on testing, if the pnp device id starts with "\\?\wpdbusenumroot#",
// then the attached device belongs to a mass storage class.
if (base::StartsWith(pnp_device_id, L"\\\\?\\wpdbusenumroot#",
base::CompareCase::INSENSITIVE_ASCII))
return true;
// If the device is a volume mounted device, |device_name| will be
// the volume name.
return ((device_name.length() >= 2) && (device_name[1] == L':') &&
(((device_name[0] >= L'A') && (device_name[0] <= L'Z')) ||
((device_name[0] >= L'a') && (device_name[0] <= L'z'))));
}
// Returns the name of the device specified by |pnp_device_id|.
std::wstring GetDeviceNameOnBlockingThread(
IPortableDeviceManager* portable_device_manager,
const std::wstring& pnp_device_id) {
DCHECK(portable_device_manager);
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
std::wstring name;
GetFriendlyName(pnp_device_id, portable_device_manager, &name) ||
GetDeviceDescription(pnp_device_id, portable_device_manager, &name) ||
GetManufacturerName(pnp_device_id, portable_device_manager, &name);
return name;
}
// Access the device and gets the device storage details. On success, returns
// true and populates |storage_objects| with device storage details.
bool GetDeviceStorageObjectsOnBlockingThread(
const std::wstring& pnp_device_id,
PortableDeviceWatcherWin::StorageObjects* storage_objects) {
DCHECK(storage_objects);
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
Microsoft::WRL::ComPtr<IPortableDevice> device;
if (!SetUp(pnp_device_id, &device))
return false;
std::wstring device_serial_num;
if (!GetObjectUniqueId(device.Get(), WPD_DEVICE_OBJECT_ID,
&device_serial_num)) {
return false;
}
PortableDeviceWatcherWin::StorageObjectIDs storage_obj_ids;
if (!GetRemovableStorageObjectIds(device.Get(), &storage_obj_ids))
return false;
for (PortableDeviceWatcherWin::StorageObjectIDs::const_iterator id_iter =
storage_obj_ids.begin(); id_iter != storage_obj_ids.end(); ++id_iter) {
std::wstring storage_persistent_id;
if (!GetObjectUniqueId(device.Get(), *id_iter, &storage_persistent_id))
continue;
std::string device_storage_id;
if (ConstructDeviceStorageUniqueId(device_serial_num, storage_persistent_id,
&device_storage_id)) {
storage_objects->push_back(PortableDeviceWatcherWin::DeviceStorageObject(
*id_iter, device_storage_id));
}
}
return true;
}
// Accesses the device and gets the device details (name, storage info, etc).
// On success returns true and fills in |device_details|. On failure, returns
// false. |pnp_device_id| specifies the plug and play device ID string.
bool GetDeviceInfoOnBlockingThread(
IPortableDeviceManager* portable_device_manager,
const std::wstring& pnp_device_id,
PortableDeviceWatcherWin::DeviceDetails* device_details) {
DCHECK(portable_device_manager);
DCHECK(device_details);
DCHECK(!pnp_device_id.empty());
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
device_details->name = GetDeviceNameOnBlockingThread(portable_device_manager,
pnp_device_id);
if (IsMassStoragePortableDevice(pnp_device_id, device_details->name))
return false;
device_details->location = pnp_device_id;
PortableDeviceWatcherWin::StorageObjects storage_objects;
return GetDeviceStorageObjectsOnBlockingThread(
pnp_device_id, &device_details->storage_objects);
}
// Wrapper function to get an instance of portable device manager. On success,
// returns true and fills in |portable_device_mgr|. On failure, returns false.
bool GetPortableDeviceManager(
Microsoft::WRL::ComPtr<IPortableDeviceManager>* portable_device_mgr) {
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
HRESULT hr = ::CoCreateInstance(__uuidof(PortableDeviceManager), nullptr,
CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&(*portable_device_mgr)));
if (SUCCEEDED(hr))
return true;
// Either there is no portable device support (Windows XP with old versions of
// Media Player) or the thread does not have COM initialized.
DCHECK_NE(CO_E_NOTINITIALIZED, hr);
return false;
}
// Enumerates the attached portable devices. On success, returns true and fills
// in |devices| with the attached portable device details. On failure, returns
// false.
bool EnumerateAttachedDevicesOnBlockingThread(
PortableDeviceWatcherWin::Devices* devices) {
DCHECK(devices);
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
Microsoft::WRL::ComPtr<IPortableDeviceManager> portable_device_mgr;
if (!GetPortableDeviceManager(&portable_device_mgr))
return false;
// Get the total number of devices found on the system.
DWORD pnp_device_count = 0;
HRESULT hr = portable_device_mgr->GetDevices(nullptr, &pnp_device_count);
if (FAILED(hr))
return false;
auto pnp_device_ids = base::HeapArray<wchar_t*>::Uninit(pnp_device_count);
hr =
portable_device_mgr->GetDevices(pnp_device_ids.data(), &pnp_device_count);
if (FAILED(hr))
return false;
for (DWORD index = 0; index < pnp_device_count; ++index) {
PortableDeviceWatcherWin::DeviceDetails device_details;
if (GetDeviceInfoOnBlockingThread(portable_device_mgr.Get(),
pnp_device_ids[index], &device_details))
devices->push_back(device_details);
CoTaskMemFree(pnp_device_ids[index]);
}
return !devices->empty();
}
// Handles the device attach event message on a media task runner.
// |pnp_device_id| specifies the attached plug and play device ID string. On
// success, returns true and populates |device_details| with device information.
// On failure, returns false.
bool HandleDeviceAttachedEventOnBlockingThread(
const std::wstring& pnp_device_id,
PortableDeviceWatcherWin::DeviceDetails* device_details) {
DCHECK(device_details);
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
Microsoft::WRL::ComPtr<IPortableDeviceManager> portable_device_mgr;
if (!GetPortableDeviceManager(&portable_device_mgr))
return false;
// Sometimes, portable device manager doesn't have the new device details.
// Refresh the manager device list to update its details.
portable_device_mgr->RefreshDeviceList();
return GetDeviceInfoOnBlockingThread(portable_device_mgr.Get(), pnp_device_id,
device_details);
}
// Registers |hwnd| to receive portable device notification details. On success,
// returns the device notifications handle else returns NULL.
HDEVNOTIFY RegisterPortableDeviceNotification(HWND hwnd) {
GUID dev_interface_guid = GUID_NULL;
HRESULT hr = CLSIDFromString(kWPDDevInterfaceGUID, &dev_interface_guid);
if (FAILED(hr))
return nullptr;
DEV_BROADCAST_DEVICEINTERFACE db = {
sizeof(DEV_BROADCAST_DEVICEINTERFACE),
DBT_DEVTYP_DEVICEINTERFACE,
0,
dev_interface_guid
};
return RegisterDeviceNotification(hwnd, &db, DEVICE_NOTIFY_WINDOW_HANDLE);
}
} // namespace
// PortableDeviceWatcherWin ---------------------------------------------------
PortableDeviceWatcherWin::DeviceStorageObject::DeviceStorageObject(
const std::wstring& temporary_id,
const std::string& persistent_id)
: object_temporary_id(temporary_id), object_persistent_id(persistent_id) {}
PortableDeviceWatcherWin::DeviceDetails::DeviceDetails() {
}
PortableDeviceWatcherWin::DeviceDetails::DeviceDetails(
const DeviceDetails& other) = default;
PortableDeviceWatcherWin::DeviceDetails::~DeviceDetails() {
}
PortableDeviceWatcherWin::PortableDeviceWatcherWin()
: notifications_(nullptr), storage_notifications_(nullptr) {}
PortableDeviceWatcherWin::~PortableDeviceWatcherWin() {
UnregisterDeviceNotification(notifications_);
}
void PortableDeviceWatcherWin::Init(HWND hwnd) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
notifications_ = RegisterPortableDeviceNotification(hwnd);
media_task_runner_ = base::ThreadPool::CreateCOMSTATaskRunner(
{base::MayBlock(), base::TaskPriority::BEST_EFFORT,
base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN});
EnumerateAttachedDevices();
}
void PortableDeviceWatcherWin::OnWindowMessage(UINT event_type, LPARAM data) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (!IsPortableDeviceStructure(data))
return;
std::wstring device_id = GetPnpDeviceId(data);
if (event_type == DBT_DEVICEARRIVAL)
HandleDeviceAttachEvent(device_id);
else if (event_type == DBT_DEVICEREMOVECOMPLETE)
HandleDeviceDetachEvent(device_id);
}
bool PortableDeviceWatcherWin::GetMTPStorageInfoFromDeviceId(
const std::string& storage_device_id,
std::wstring* device_location,
std::wstring* storage_object_id) const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(device_location);
DCHECK(storage_object_id);
MTPStorageMap::const_iterator storage_map_iter =
storage_map_.find(storage_device_id);
if (storage_map_iter == storage_map_.end())
return false;
MTPDeviceMap::const_iterator device_iter =
device_map_.find(storage_map_iter->second.location());
if (device_iter == device_map_.end())
return false;
const StorageObjects& storage_objects = device_iter->second;
for (StorageObjects::const_iterator storage_object_iter =
storage_objects.begin(); storage_object_iter != storage_objects.end();
++storage_object_iter) {
if (storage_device_id == storage_object_iter->object_persistent_id) {
*device_location = storage_map_iter->second.location();
*storage_object_id = storage_object_iter->object_temporary_id;
return true;
}
}
return false;
}
// static
std::wstring PortableDeviceWatcherWin::GetStoragePathFromStorageId(
const std::string& storage_unique_id) {
// Construct a dummy device path using the storage name. This is only used
// for registering the device media file system.
DCHECK(!storage_unique_id.empty());
return base::UTF8ToWide("\\\\" + storage_unique_id);
}
void PortableDeviceWatcherWin::SetNotifications(
StorageMonitor::Receiver* notifications) {
storage_notifications_ = notifications;
}
void PortableDeviceWatcherWin::EjectDevice(
const std::string& device_id,
base::OnceCallback<void(StorageMonitor::EjectStatus)> callback) {
// MTP devices on Windows don't have a detach API needed -- signal
// the object as if the device is gone and tell the caller it is OK
// to remove.
std::wstring device_location; // The device_map_ key.
std::wstring storage_object_id;
if (!GetMTPStorageInfoFromDeviceId(device_id,
&device_location, &storage_object_id)) {
std::move(callback).Run(StorageMonitor::EJECT_NO_SUCH_DEVICE);
return;
}
HandleDeviceDetachEvent(device_location);
std::move(callback).Run(StorageMonitor::EJECT_OK);
}
void PortableDeviceWatcherWin::EnumerateAttachedDevices() {
DCHECK(media_task_runner_);
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
Devices* devices = new Devices;
media_task_runner_->PostTaskAndReplyWithResult(
FROM_HERE,
base::BindOnce(&EnumerateAttachedDevicesOnBlockingThread, devices),
base::BindOnce(&PortableDeviceWatcherWin::OnDidEnumerateAttachedDevices,
weak_ptr_factory_.GetWeakPtr(), base::Owned(devices)));
}
void PortableDeviceWatcherWin::OnDidEnumerateAttachedDevices(
const Devices* devices, const bool result) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(devices);
if (!result)
return;
for (Devices::const_iterator device_iter = devices->begin();
device_iter != devices->end(); ++device_iter) {
OnDidHandleDeviceAttachEvent(&(*device_iter), result);
}
}
void PortableDeviceWatcherWin::HandleDeviceAttachEvent(
const std::wstring& pnp_device_id) {
DCHECK(media_task_runner_);
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DeviceDetails* device_details = new DeviceDetails;
media_task_runner_->PostTaskAndReplyWithResult(
FROM_HERE,
base::BindOnce(&HandleDeviceAttachedEventOnBlockingThread, pnp_device_id,
device_details),
base::BindOnce(&PortableDeviceWatcherWin::OnDidHandleDeviceAttachEvent,
weak_ptr_factory_.GetWeakPtr(),
base::Owned(device_details)));
}
void PortableDeviceWatcherWin::OnDidHandleDeviceAttachEvent(
const DeviceDetails* device_details, const bool result) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(device_details);
if (!result)
return;
const StorageObjects& storage_objects = device_details->storage_objects;
const std::wstring& name = device_details->name;
const std::wstring& location = device_details->location;
DCHECK(!base::Contains(device_map_, location));
for (StorageObjects::const_iterator storage_iter = storage_objects.begin();
storage_iter != storage_objects.end(); ++storage_iter) {
const std::string& storage_id = storage_iter->object_persistent_id;
DCHECK(!base::Contains(storage_map_, storage_id));
if (storage_id.empty() || name.empty())
return;
// Device can have several data partitions. Therefore, add the
// partition identifier to the model name. E.g.: "Nexus 7 (s10001)"
std::wstring model_name(name + L" (" + storage_iter->object_temporary_id +
L')');
StorageInfo info(storage_id, location, std::u16string(), std::u16string(),
base::WideToUTF16(model_name), 0);
storage_map_[storage_id] = info;
if (storage_notifications_) {
info.set_location(GetStoragePathFromStorageId(storage_id));
storage_notifications_->ProcessAttach(info);
}
}
device_map_[location] = storage_objects;
}
void PortableDeviceWatcherWin::HandleDeviceDetachEvent(
const std::wstring& pnp_device_id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
MTPDeviceMap::iterator device_iter = device_map_.find(pnp_device_id);
if (device_iter == device_map_.end())
return;
const StorageObjects& storage_objects = device_iter->second;
for (StorageObjects::const_iterator storage_object_iter =
storage_objects.begin(); storage_object_iter != storage_objects.end();
++storage_object_iter) {
std::string storage_id = storage_object_iter->object_persistent_id;
MTPStorageMap::iterator storage_map_iter = storage_map_.find(storage_id);
CHECK(storage_map_iter != storage_map_.end(), base::NotFatalUntil::M130);
if (storage_notifications_) {
storage_notifications_->ProcessDetach(
storage_map_iter->second.device_id());
}
storage_map_.erase(storage_map_iter);
}
device_map_.erase(device_iter);
}
} // namespace storage_monitor
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