chrome/browser/jumplist_updater_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 "chrome/browser/jumplist_updater_win.h"
   6
   7 #include <windows.h>
   8 #include <propkey.h>
   9 #include <shobjidl.h>
  10
  11 #include "base/command_line.h"
  12 #include "base/files/file_path.h"
  13 #include "base/path_service.h"
  14 #include "base/win/win_util.h"
  15 #include "base/win/windows_version.h"
  16 #include "chrome/common/chrome_switches.h"
  17
  18 namespace {
  19
  20 // Creates an IShellLink object.
  21 // An IShellLink object is almost the same as an application shortcut, and it
  22 // requires three items: the absolute path to an application, an argument
  23 // string, and a title string.
  24 bool AddShellLink(base::win::ScopedComPtr<IObjectCollection> collection,
  25                   const std::wstring& application_path,
  26                   scoped_refptr<ShellLinkItem> item) {
  27   // Create an IShellLink object.
  28   base::win::ScopedComPtr<IShellLink> link;
  29   HRESULT result = link.CreateInstance(CLSID_ShellLink, NULL,
  30                                        CLSCTX_INPROC_SERVER);
  31   if (FAILED(result))
  32     return false;
  33
  34   // Set the application path.
  35   // We should exit this function when this call fails because it doesn't make
  36   // any sense to add a shortcut that we cannot execute.
  37   result = link->SetPath(application_path.c_str());
  38   if (FAILED(result))
  39     return false;
  40
  41   // Attach the command-line switches of this process before the given
  42   // arguments and set it as the arguments of this IShellLink object.
  43   // We also exit this function when this call fails because it isn't useful to
  44   // add a shortcut that cannot open the given page.
  45   std::wstring arguments(item->GetArguments());
  46   if (!arguments.empty()) {
  47     result = link->SetArguments(arguments.c_str());
  48     if (FAILED(result))
  49       return false;
  50   }
  51
  52   // Attach the given icon path to this IShellLink object.
  53   // Since an icon is an optional item for an IShellLink object, so we don't
  54   // have to exit even when it fails.
  55   if (!item->icon_path().empty())
  56     link->SetIconLocation(item->icon_path().c_str(), item->icon_index());
  57
  58   // Set the title of the IShellLink object.
  59   // The IShellLink interface does not have any functions which update its
  60   // title because this interface is originally for creating an application
  61   // shortcut which doesn't have titles.
  62   // So, we should use the IPropertyStore interface to set its title.
  63   base::win::ScopedComPtr<IPropertyStore> property_store;
  64   result = link.QueryInterface(property_store.Receive());
  65   if (FAILED(result))
  66     return false;
  67
  68   if (!base::win::SetStringValueForPropertyStore(
  69           property_store.get(),
  70           PKEY_Title,
  71           item->title().c_str())) {
  72     return false;
  73   }
  74
  75   // Add this IShellLink object to the given collection.
  76   return SUCCEEDED(collection->AddObject(link));
  77 }
  78
  79 }  // namespace
  80
  81
  82 // ShellLinkItem
  83
  84 ShellLinkItem::ShellLinkItem()
  85     : command_line_(CommandLine::NO_PROGRAM),
  86       icon_index_(0) {
  87 }
  88
  89 ShellLinkItem::~ShellLinkItem() {}
  90
  91 std::wstring ShellLinkItem::GetArguments() const {
  92   return command_line_.GetArgumentsString();
  93 }
  94
  95 CommandLine* ShellLinkItem::GetCommandLine() {
  96   return &command_line_;
  97 }
  98
  99
 100 // JumpListUpdater
 101
 102 JumpListUpdater::JumpListUpdater(const std::wstring& app_user_model_id)
 103     : app_user_model_id_(app_user_model_id),
 104       user_max_items_(0) {
 105 }
 106
 107 JumpListUpdater::~JumpListUpdater() {
 108 }
 109
 110 // static
 111 bool JumpListUpdater::IsEnabled() {
 112   // JumpList is implemented only on Windows 7 or later.
 113   // Do not create custom JumpLists in tests. See http://crbug.com/389375.
 114   return base::win::GetVersion() >= base::win::VERSION_WIN7 &&
 115          !CommandLine::ForCurrentProcess()->HasSwitch(switches::kTestType);
 116 }
 117
 118 bool JumpListUpdater::BeginUpdate() {
 119   // This instance is expected to be one-time-use only.
 120   DCHECK(!destination_list_.get());
 121
 122   // Check preconditions.
 123   if (!JumpListUpdater::IsEnabled() || app_user_model_id_.empty())
 124     return false;
 125
 126   // Create an ICustomDestinationList object and attach it to our application.
 127   HRESULT result = destination_list_.CreateInstance(CLSID_DestinationList, NULL,
 128                                                     CLSCTX_INPROC_SERVER);
 129   if (FAILED(result))
 130     return false;
 131
 132   // Set the App ID for this JumpList.
 133   result = destination_list_->SetAppID(app_user_model_id_.c_str());
 134   if (FAILED(result))
 135     return false;
 136
 137   // Start a transaction that updates the JumpList of this application.
 138   // This implementation just replaces the all items in this JumpList, so
 139   // we don't have to use the IObjectArray object returned from this call.
 140   // It seems Windows 7 RC (Build 7100) automatically checks the items in this
 141   // removed list and prevent us from adding the same item.
 142   UINT max_slots;
 143   base::win::ScopedComPtr<IObjectArray> removed;
 144   result = destination_list_->BeginList(&max_slots, __uuidof(*removed),
 145                                         removed.ReceiveVoid());
 146   if (FAILED(result))
 147     return false;
 148
 149   user_max_items_ = max_slots;
 150
 151   return true;
 152 }
 153
 154 bool JumpListUpdater::CommitUpdate() {
 155   if (!destination_list_.get())
 156     return false;
 157
 158   // Commit this transaction and send the updated JumpList to Windows.
 159   return SUCCEEDED(destination_list_->CommitList());
 160 }
 161
 162 bool JumpListUpdater::AddTasks(const ShellLinkItemList& link_items) {
 163   if (!destination_list_.get())
 164     return false;
 165
 166   // Retrieve the absolute path to "chrome.exe".
 167   base::FilePath application_path;
 168   if (!PathService::Get(base::FILE_EXE, &application_path))
 169     return false;
 170
 171   // Create an EnumerableObjectCollection object to be added items of the
 172   // "Task" category.
 173   base::win::ScopedComPtr<IObjectCollection> collection;
 174   HRESULT result = collection.CreateInstance(CLSID_EnumerableObjectCollection,
 175                                              NULL, CLSCTX_INPROC_SERVER);
 176   if (FAILED(result))
 177     return false;
 178
 179   // Add items to the "Task" category.
 180   for (ShellLinkItemList::const_iterator it = link_items.begin();
 181        it != link_items.end(); ++it) {
 182     AddShellLink(collection, application_path.value(), *it);
 183   }
 184
 185   // We can now add the new list to the JumpList.
 186   // ICustomDestinationList::AddUserTasks() also uses the IObjectArray
 187   // interface to retrieve each item in the list. So, we retrieve the
 188   // IObjectArray interface from the EnumerableObjectCollection object.
 189   base::win::ScopedComPtr<IObjectArray> object_array;
 190   result = collection.QueryInterface(object_array.Receive());
 191   if (FAILED(result))
 192     return false;
 193
 194   return SUCCEEDED(destination_list_->AddUserTasks(object_array));
 195 }
 196
 197 bool JumpListUpdater::AddCustomCategory(const std::wstring& category_name,
 198                                         const ShellLinkItemList& link_items,
 199                                         size_t max_items) {
 200  if (!destination_list_.get())
 201     return false;
 202
 203   // Retrieve the absolute path to "chrome.exe".
 204   base::FilePath application_path;
 205   if (!PathService::Get(base::FILE_EXE, &application_path))
 206     return false;
 207
 208   // Exit this function when the given vector does not contain any items
 209   // because an ICustomDestinationList::AppendCategory() call fails in this
 210   // case.
 211   if (link_items.empty() || !max_items)
 212     return true;
 213
 214   // Create an EnumerableObjectCollection object.
 215   // We once add the given items to this collection object and add this
 216   // collection to the JumpList.
 217   base::win::ScopedComPtr<IObjectCollection> collection;
 218   HRESULT result = collection.CreateInstance(CLSID_EnumerableObjectCollection,
 219                                              NULL, CLSCTX_INPROC_SERVER);
 220   if (FAILED(result))
 221     return false;
 222
 223   for (ShellLinkItemList::const_iterator item = link_items.begin();
 224        item != link_items.end() && max_items > 0; ++item, --max_items) {
 225     scoped_refptr<ShellLinkItem> link(*item);
 226     AddShellLink(collection, application_path.value(), link);
 227   }
 228
 229   // We can now add the new list to the JumpList.
 230   // The ICustomDestinationList::AppendCategory() function needs the
 231   // IObjectArray interface to retrieve each item in the list. So, we retrive
 232   // the IObjectArray interface from the IEnumerableObjectCollection object
 233   // and use it.
 234   // It seems the ICustomDestinationList::AppendCategory() function just
 235   // replaces all items in the given category with the ones in the new list.
 236   base::win::ScopedComPtr<IObjectArray> object_array;
 237   result = collection.QueryInterface(object_array.Receive());
 238   if (FAILED(result))
 239     return false;
 240
 241   return SUCCEEDED(destination_list_->AppendCategory(category_name.c_str(),
 242                                                      object_array));
 243 }