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