Remove MTP support on Linux.

components/storage_monitor/media_transfer_protocol_device_observer_linux.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "components/storage_monitor/media_transfer_protocol_device_observer_linux.h"
-
-#include <vector>
-
-#include "base/files/file_path.h"
-#include "base/stl_util.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_split.h"
-#include "base/strings/utf_string_conversions.h"
-#include "components/storage_monitor/media_storage_util.h"
-#include "components/storage_monitor/removable_device_constants.h"
-#include "device/media_transfer_protocol/mtp_storage_info.pb.h"
-
-namespace storage_monitor {
-
-namespace {
-
-// Device root path constant.
-const char kRootPath[] = "/";
-
-// Constructs and returns the location of the device using the |storage_name|.
-std::string GetDeviceLocationFromStorageName(const std::string& storage_name) {
-  // Construct a dummy device path using the storage name. This is only used
-  // for registering device media file system.
-  // E.g.: If the |storage_name| is "usb:2,2:12345" then "/usb:2,2:12345" is the
-  // device location.
-  DCHECK(!storage_name.empty());
-  return kRootPath + storage_name;
-}
-
-// Returns the storage identifier of the device from the given |storage_name|.
-// E.g. If the |storage_name| is "usb:2,2:65537", the storage identifier is
-// "65537".
-std::string GetStorageIdFromStorageName(const std::string& storage_name) {
-  std::vector<base::StringPiece> name_parts = base::SplitStringPiece(
-      storage_name, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
-  return name_parts.size() == 3 ? name_parts[2].as_string() : std::string();
-}
-
-// Returns a unique device id from the given |storage_info|.
-std::string GetDeviceIdFromStorageInfo(const MtpStorageInfo& storage_info) {
-  const std::string storage_id =
-      GetStorageIdFromStorageName(storage_info.storage_name());
-  if (storage_id.empty())
-    return std::string();
-
-  // Some devices have multiple data stores. Therefore, include storage id as
-  // part of unique id along with vendor, model and volume information.
-  const std::string vendor_id = base::UintToString(storage_info.vendor_id());
-  const std::string model_id = base::UintToString(storage_info.product_id());
-  return StorageInfo::MakeDeviceId(
-      StorageInfo::MTP_OR_PTP,
-      kVendorModelVolumeStoragePrefix + vendor_id + ":" + model_id + ":" +
-          storage_info.volume_identifier() + ":" + storage_id);
-}
-
-// Returns the |data_store_id| string in the required format.
-// If the |data_store_id| is 65537, this function returns " (65537)".
-std::string GetFormattedIdString(const std::string& data_store_id) {
-  return ("(" + data_store_id + ")");
-}
-
-// Helper function to get device label from storage information.
-base::string16 GetDeviceLabelFromStorageInfo(
-    const MtpStorageInfo& storage_info) {
-  std::string device_label;
-  const std::string& vendor_name = storage_info.vendor();
-  device_label = vendor_name;
-
-  const std::string& product_name = storage_info.product();
-  if (!product_name.empty()) {
-    if (!device_label.empty())
-      device_label += " ";
-    device_label += product_name;
-  }
-
-  // Add the data store id to the device label.
-  if (!device_label.empty()) {
-    const std::string& volume_id = storage_info.volume_identifier();
-    if (!volume_id.empty()) {
-      device_label += GetFormattedIdString(volume_id);
-    } else {
-      const std::string data_store_id =
-          GetStorageIdFromStorageName(storage_info.storage_name());
-      if (!data_store_id.empty())
-        device_label += GetFormattedIdString(data_store_id);
-    }
-  }
-  return base::UTF8ToUTF16(device_label);
-}
-
-// Helper function to get the device storage details such as device id, label
-// and location. On success and fills in |id|, |label|, |location|,
-// |vendor_name|, and |product_name|.
-void GetStorageInfo(const std::string& storage_name,
-                    device::MediaTransferProtocolManager* mtp_manager,
-                    std::string* id,
-                    base::string16* label,
-                    std::string* location,
-                    base::string16* vendor_name,
-                    base::string16* product_name) {
-  DCHECK(!storage_name.empty());
-  const MtpStorageInfo* storage_info =
-      mtp_manager->GetStorageInfo(storage_name);
-
-  if (!storage_info)
-    return;
-
-  *id = GetDeviceIdFromStorageInfo(*storage_info);
-  *label = GetDeviceLabelFromStorageInfo(*storage_info);
-  *location = GetDeviceLocationFromStorageName(storage_name);
-  *vendor_name = base::UTF8ToUTF16(storage_info->vendor());
-  *product_name = base::UTF8ToUTF16(storage_info->product());
-}
-
-}  // namespace
-
-MediaTransferProtocolDeviceObserverLinux::
-MediaTransferProtocolDeviceObserverLinux(
-    StorageMonitor::Receiver* receiver,
-    device::MediaTransferProtocolManager* mtp_manager)
-    : mtp_manager_(mtp_manager),
-      get_storage_info_func_(&GetStorageInfo),
-      notifications_(receiver) {
-  mtp_manager_->AddObserver(this);
-  EnumerateStorages();
-}
-
-// This constructor is only used by unit tests.
-MediaTransferProtocolDeviceObserverLinux::
-MediaTransferProtocolDeviceObserverLinux(
-    StorageMonitor::Receiver* receiver,
-    device::MediaTransferProtocolManager* mtp_manager,
-    GetStorageInfoFunc get_storage_info_func)
-    : mtp_manager_(mtp_manager),
-      get_storage_info_func_(get_storage_info_func),
-      notifications_(receiver) {
-}
-
-MediaTransferProtocolDeviceObserverLinux::
-~MediaTransferProtocolDeviceObserverLinux() {
-  mtp_manager_->RemoveObserver(this);
-}
-
-bool MediaTransferProtocolDeviceObserverLinux::GetStorageInfoForPath(
-    const base::FilePath& path,
-    StorageInfo* storage_info) const {
-  DCHECK(storage_info);
-
-  if (!path.IsAbsolute())
-    return false;
-
-  std::vector<base::FilePath::StringType> path_components;
-  path.GetComponents(&path_components);
-  if (path_components.size() < 2)
-    return false;
-
-  // First and second component of the path specifies the device location.
-  // E.g.: If |path| is "/usb:2,2:65537/DCIM/Folder_a", "/usb:2,2:65537" is the
-  // device location.
-  StorageLocationToInfoMap::const_iterator info_it =
-      storage_map_.find(GetDeviceLocationFromStorageName(path_components[1]));
-  if (info_it == storage_map_.end())
-    return false;
-
-  *storage_info = info_it->second;
-  return true;
-}
-
-void MediaTransferProtocolDeviceObserverLinux::EjectDevice(
-    const std::string& device_id,
-    base::Callback<void(StorageMonitor::EjectStatus)> callback) {
-  std::string location;
-  if (!GetLocationForDeviceId(device_id, &location)) {
-    callback.Run(StorageMonitor::EJECT_NO_SUCH_DEVICE);
-    return;
-  }
-
-  // TODO(thestig): Change this to tell the mtp manager to eject the device.
-
-  StorageChanged(false, location);
-  callback.Run(StorageMonitor::EJECT_OK);
-}
-
-// device::MediaTransferProtocolManager::Observer override.
-void MediaTransferProtocolDeviceObserverLinux::StorageChanged(
-    bool is_attached,
-    const std::string& storage_name) {
-  DCHECK(!storage_name.empty());
-
-  // New storage is attached.
-  if (is_attached) {
-    std::string device_id;
-    base::string16 storage_label;
-    std::string location;
-    base::string16 vendor_name;
-    base::string16 product_name;
-    get_storage_info_func_(storage_name, mtp_manager_,
-                           &device_id, &storage_label, &location,
-                           &vendor_name, &product_name);
-
-    // Keep track of device id and device name to see how often we receive
-    // empty values.
-    MediaStorageUtil::RecordDeviceInfoHistogram(false, device_id,
-                                                storage_label);
-    if (device_id.empty() || storage_label.empty())
-      return;
-
-    DCHECK(!base::ContainsKey(storage_map_, location));
-
-    StorageInfo storage_info(device_id, location, storage_label,
-                             vendor_name, product_name, 0);
-    storage_map_[location] = storage_info;
-    notifications_->ProcessAttach(storage_info);
-  } else {
-    // Existing storage is detached.
-    StorageLocationToInfoMap::iterator it =
-        storage_map_.find(GetDeviceLocationFromStorageName(storage_name));
-    if (it == storage_map_.end())
-      return;
-    notifications_->ProcessDetach(it->second.device_id());
-    storage_map_.erase(it);
-  }
-}
-
-void MediaTransferProtocolDeviceObserverLinux::EnumerateStorages() {
-  typedef std::vector<std::string> StorageList;
-  StorageList storages = mtp_manager_->GetStorages();
-  for (StorageList::const_iterator storage_iter = storages.begin();
-       storage_iter != storages.end(); ++storage_iter) {
-    StorageChanged(true, *storage_iter);
-  }
-}
-
-bool MediaTransferProtocolDeviceObserverLinux::GetLocationForDeviceId(
-    const std::string& device_id, std::string* location) const {
-  for (StorageLocationToInfoMap::const_iterator it = storage_map_.begin();
-       it != storage_map_.end(); ++it) {
-    if (it->second.device_id() == device_id) {
-      *location = it->first;
-      return true;
-    }
-  }
-
-  return false;
-}
-
-}  // namespace storage_monitor