components/storage_monitor/storage_monitor_win.cc

   1 // Copyright 2014 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 "components/storage_monitor/storage_monitor_win.h"
   6
   7 #include <windows.h>
   8 #include <dbt.h>
   9 #include <fileapi.h>
  10 #include <shlobj.h>
  11
  12 #include "base/profiler/scoped_tracker.h"
  13 #include "base/win/wrapped_window_proc.h"
  14 #include "components/storage_monitor/portable_device_watcher_win.h"
  15 #include "components/storage_monitor/removable_device_constants.h"
  16 #include "components/storage_monitor/storage_info.h"
  17 #include "components/storage_monitor/volume_mount_watcher_win.h"
  18
  19 #define WM_USER_MEDIACHANGED (WM_USER + 5)
  20
  21 // StorageMonitorWin -------------------------------------------------------
  22
  23 namespace storage_monitor {
  24
  25 StorageMonitorWin::StorageMonitorWin(
  26     VolumeMountWatcherWin* volume_mount_watcher,
  27     PortableDeviceWatcherWin* portable_device_watcher)
  28     : window_class_(0),
  29       instance_(NULL),
  30       window_(NULL),
  31       shell_change_notify_id_(0),
  32       volume_mount_watcher_(volume_mount_watcher),
  33       portable_device_watcher_(portable_device_watcher) {
  34   DCHECK(volume_mount_watcher_);
  35   DCHECK(portable_device_watcher_);
  36   volume_mount_watcher_->SetNotifications(receiver());
  37   portable_device_watcher_->SetNotifications(receiver());
  38 }
  39
  40 StorageMonitorWin::~StorageMonitorWin() {
  41   if (shell_change_notify_id_)
  42     SHChangeNotifyDeregister(shell_change_notify_id_);
  43   volume_mount_watcher_->SetNotifications(NULL);
  44   portable_device_watcher_->SetNotifications(NULL);
  45
  46   if (window_)
  47     DestroyWindow(window_);
  48
  49   if (window_class_)
  50     UnregisterClass(MAKEINTATOM(window_class_), instance_);
  51 }
  52
  53 void StorageMonitorWin::Init() {
  54   WNDCLASSEX window_class;
  55   base::win::InitializeWindowClass(
  56       L"Chrome_StorageMonitorWindow",
  57       &base::win::WrappedWindowProc<StorageMonitorWin::WndProcThunk>,
  58       0, 0, 0, NULL, NULL, NULL, NULL, NULL,
  59       &window_class);
  60   instance_ = window_class.hInstance;
  61   window_class_ = RegisterClassEx(&window_class);
  62   DCHECK(window_class_);
  63
  64   window_ = CreateWindow(MAKEINTATOM(window_class_), 0, 0, 0, 0, 0, 0, 0, 0,
  65                          instance_, 0);
  66   SetWindowLongPtr(window_, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(this));
  67   volume_mount_watcher_->Init();
  68   portable_device_watcher_->Init(window_);
  69   MediaChangeNotificationRegister();
  70 }
  71
  72 bool StorageMonitorWin::GetStorageInfoForPath(const base::FilePath& path,
  73                                               StorageInfo* device_info) const {
  74   DCHECK(device_info);
  75
  76   // TODO(gbillock): Move this logic up to StorageMonitor.
  77   // If we already know the StorageInfo for the path, just return it.
  78   // This will account for portable devices as well.
  79   std::vector<StorageInfo> attached_devices = GetAllAvailableStorages();
  80   size_t best_parent = attached_devices.size();
  81   size_t best_length = 0;
  82   for (size_t i = 0; i < attached_devices.size(); i++) {
  83     if (!StorageInfo::IsRemovableDevice(attached_devices[i].device_id()))
  84       continue;
  85     base::FilePath relative;
  86     if (base::FilePath(attached_devices[i].location()).AppendRelativePath(
  87             path, &relative)) {
  88       // Note: the relative path is longer for shorter shared path between
  89       // the path and the device mount point, so we want the shortest
  90       // relative path.
  91       if (relative.value().size() < best_length) {
  92         best_parent = i;
  93         best_length = relative.value().size();
  94       }
  95     }
  96   }
  97   if (best_parent != attached_devices.size()) {
  98     *device_info = attached_devices[best_parent];
  99     return true;
 100   }
 101
 102   return GetDeviceInfo(path, device_info);
 103 }
 104
 105 void StorageMonitorWin::EjectDevice(
 106     const std::string& device_id,
 107     base::Callback<void(EjectStatus)> callback) {
 108   StorageInfo::Type type;
 109   if (!StorageInfo::CrackDeviceId(device_id, &type, NULL)) {
 110     callback.Run(EJECT_FAILURE);
 111     return;
 112   }
 113
 114   if (type == StorageInfo::MTP_OR_PTP)
 115     portable_device_watcher_->EjectDevice(device_id, callback);
 116   else if (StorageInfo::IsRemovableDevice(device_id))
 117     volume_mount_watcher_->EjectDevice(device_id, callback);
 118   else
 119     callback.Run(EJECT_FAILURE);
 120 }
 121
 122 bool StorageMonitorWin::GetMTPStorageInfoFromDeviceId(
 123     const std::string& storage_device_id,
 124     base::string16* device_location,
 125     base::string16* storage_object_id) const {
 126   StorageInfo::Type type;
 127   StorageInfo::CrackDeviceId(storage_device_id, &type, NULL);
 128   return ((type == StorageInfo::MTP_OR_PTP) &&
 129       portable_device_watcher_->GetMTPStorageInfoFromDeviceId(
 130           storage_device_id, device_location, storage_object_id));
 131 }
 132
 133 // static
 134 LRESULT CALLBACK StorageMonitorWin::WndProcThunk(HWND hwnd, UINT message,
 135                                                  WPARAM wparam, LPARAM lparam) {
 136   StorageMonitorWin* msg_wnd = reinterpret_cast<StorageMonitorWin*>(
 137       GetWindowLongPtr(hwnd, GWLP_USERDATA));
 138   if (msg_wnd)
 139     return msg_wnd->WndProc(hwnd, message, wparam, lparam);
 140   return ::DefWindowProc(hwnd, message, wparam, lparam);
 141 }
 142
 143 LRESULT CALLBACK StorageMonitorWin::WndProc(HWND hwnd, UINT message,
 144                                             WPARAM wparam, LPARAM lparam) {
 145   switch (message) {
 146     case WM_DEVICECHANGE:
 147       OnDeviceChange(static_cast<UINT>(wparam), lparam);
 148       return TRUE;
 149     case WM_USER_MEDIACHANGED:
 150       OnMediaChange(wparam, lparam);
 151       return TRUE;
 152     default:
 153       break;
 154   }
 155
 156   return ::DefWindowProc(hwnd, message, wparam, lparam);
 157 }
 158
 159 void StorageMonitorWin::MediaChangeNotificationRegister() {
 160   LPITEMIDLIST id_list;
 161   if (SHGetSpecialFolderLocation(NULL, CSIDL_DRIVES, &id_list) == NOERROR) {
 162     SHChangeNotifyEntry notify_entry;
 163     notify_entry.pidl = id_list;
 164     notify_entry.fRecursive = TRUE;
 165     shell_change_notify_id_ = SHChangeNotifyRegister(
 166         window_, SHCNRF_ShellLevel, SHCNE_MEDIAINSERTED | SHCNE_MEDIAREMOVED,
 167         WM_USER_MEDIACHANGED, 1, &notify_entry);
 168     if (!shell_change_notify_id_)
 169       DVLOG(1) << "SHChangeNotifyRegister FAILED";
 170   } else {
 171     DVLOG(1) << "SHGetSpecialFolderLocation FAILED";
 172   }
 173 }
 174
 175 bool StorageMonitorWin::GetDeviceInfo(const base::FilePath& device_path,
 176                                       StorageInfo* info) const {
 177   DCHECK(info);
 178
 179   // TODO(kmadhusu) Implement PortableDeviceWatcherWin::GetDeviceInfo()
 180   // function when we have the functionality to add a sub directory of
 181   // portable device as a media gallery.
 182   return volume_mount_watcher_->GetDeviceInfo(device_path, info);
 183 }
 184
 185 void StorageMonitorWin::OnDeviceChange(UINT event_type, LPARAM data) {
 186   DVLOG(1) << "OnDeviceChange " << event_type << " " << data;
 187   volume_mount_watcher_->OnWindowMessage(event_type, data);
 188   portable_device_watcher_->OnWindowMessage(event_type, data);
 189 }
 190
 191 void StorageMonitorWin::OnMediaChange(WPARAM wparam, LPARAM lparam) {
 192   volume_mount_watcher_->OnMediaChange(wparam, lparam);
 193 }
 194
 195 StorageMonitor* StorageMonitor::CreateInternal() {
 196   return new StorageMonitorWin(new VolumeMountWatcherWin(),
 197                                new PortableDeviceWatcherWin());
 198 }
 199
 200 }  // namespace storage_monitor