chrome/browser/platform_util_win.cc

   1 // Copyright (c) 2011 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/platform_util.h"
   6
   7 #include <commdlg.h>
   8 #include <dwmapi.h>
   9 #include <shellapi.h>
  10 #include <shlobj.h>
  11
  12 #include "base/bind.h"
  13 #include "base/bind_helpers.h"
  14 #include "base/files/file_path.h"
  15 #include "base/files/file_util.h"
  16 #include "base/logging.h"
  17 #include "base/metrics/field_trial.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/strings/utf_string_conversions.h"
  20 #include "base/win/registry.h"
  21 #include "base/win/scoped_co_mem.h"
  22 #include "base/win/scoped_comptr.h"
  23 #include "base/win/windows_version.h"
  24 #include "chrome/browser/lifetime/application_lifetime.h"
  25 #include "chrome/browser/platform_util_internal.h"
  26 #include "chrome/browser/ui/host_desktop.h"
  27 #include "chrome/common/chrome_utility_messages.h"
  28 #include "chrome/grit/generated_resources.h"
  29 #include "content/public/browser/browser_thread.h"
  30 #include "content/public/browser/utility_process_host.h"
  31 #include "content/public/browser/utility_process_host_client.h"
  32 #include "ui/base/l10n/l10n_util.h"
  33 #include "ui/base/win/shell.h"
  34 #include "ui/gfx/native_widget_types.h"
  35 #include "url/gurl.h"
  36
  37 using content::BrowserThread;
  38
  39 namespace platform_util {
  40
  41 namespace {
  42
  43 // TODO(asanka): Move this to ui/base/win/shell.{h,cc} and invoke it from the
  44 // utility process.
  45 void ShowItemInFolderOnFileThread(const base::FilePath& full_path) {
  46   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
  47   base::FilePath dir = full_path.DirName().AsEndingWithSeparator();
  48   // ParseDisplayName will fail if the directory is "C:", it must be "C:\\".
  49   if (dir.empty())
  50     return;
  51
  52   typedef HRESULT (WINAPI *SHOpenFolderAndSelectItemsFuncPtr)(
  53       PCIDLIST_ABSOLUTE pidl_Folder,
  54       UINT cidl,
  55       PCUITEMID_CHILD_ARRAY pidls,
  56       DWORD flags);
  57
  58   static SHOpenFolderAndSelectItemsFuncPtr open_folder_and_select_itemsPtr =
  59       nullptr;
  60   static bool initialize_open_folder_proc = true;
  61   if (initialize_open_folder_proc) {
  62     initialize_open_folder_proc = false;
  63     // The SHOpenFolderAndSelectItems API is exposed by shell32 version 6
  64     // and does not exist in Win2K. We attempt to retrieve this function export
  65     // from shell32 and if it does not exist, we just invoke ShellExecute to
  66     // open the folder thus losing the functionality to select the item in
  67     // the process.
  68     HMODULE shell32_base = GetModuleHandle(L"shell32.dll");
  69     if (!shell32_base) {
  70       NOTREACHED() << " " << __FUNCTION__ << "(): Can't open shell32.dll";
  71       return;
  72     }
  73     open_folder_and_select_itemsPtr =
  74         reinterpret_cast<SHOpenFolderAndSelectItemsFuncPtr>
  75             (GetProcAddress(shell32_base, "SHOpenFolderAndSelectItems"));
  76   }
  77   if (!open_folder_and_select_itemsPtr) {
  78     ShellExecute(NULL, L"open", dir.value().c_str(), NULL, NULL, SW_SHOW);
  79     return;
  80   }
  81
  82   base::win::ScopedComPtr<IShellFolder> desktop;
  83   HRESULT hr = SHGetDesktopFolder(desktop.Receive());
  84   if (FAILED(hr))
  85     return;
  86
  87   base::win::ScopedCoMem<ITEMIDLIST> dir_item;
  88   hr = desktop->ParseDisplayName(NULL, NULL,
  89                                  const_cast<wchar_t *>(dir.value().c_str()),
  90                                  NULL, &dir_item, NULL);
  91   if (FAILED(hr))
  92     return;
  93
  94   base::win::ScopedCoMem<ITEMIDLIST> file_item;
  95   hr = desktop->ParseDisplayName(NULL, NULL,
  96       const_cast<wchar_t *>(full_path.value().c_str()),
  97       NULL, &file_item, NULL);
  98   if (FAILED(hr))
  99     return;
 100
 101   const ITEMIDLIST* highlight[] = { file_item };
 102
 103   hr = (*open_folder_and_select_itemsPtr)(dir_item, arraysize(highlight),
 104                                           highlight, NULL);
 105
 106   if (FAILED(hr)) {
 107     // On some systems, the above call mysteriously fails with "file not
 108     // found" even though the file is there.  In these cases, ShellExecute()
 109     // seems to work as a fallback (although it won't select the file).
 110     if (hr == ERROR_FILE_NOT_FOUND) {
 111       ShellExecute(NULL, L"open", dir.value().c_str(), NULL, NULL, SW_SHOW);
 112     } else {
 113       LOG(WARNING) << " " << __FUNCTION__ << "(): Can't open full_path = \""
 114                    << full_path.value() << "\""
 115                    << " hr = " << logging::SystemErrorCodeToString(hr);
 116     }
 117   }
 118 }
 119
 120 // Old ShellExecute crashes the process when the command for a given scheme
 121 // is empty. This function tells if it is.
 122 bool ValidateShellCommandForScheme(const std::string& scheme) {
 123   base::win::RegKey key;
 124   base::string16 registry_path = base::ASCIIToUTF16(scheme) +
 125                                  L"\\shell\\open\\command";
 126   key.Open(HKEY_CLASSES_ROOT, registry_path.c_str(), KEY_READ);
 127   if (!key.Valid())
 128     return false;
 129   DWORD size = 0;
 130   key.ReadValue(NULL, NULL, &size, NULL);
 131   if (size <= 2)
 132     return false;
 133   return true;
 134 }
 135
 136 void OpenExternalOnFileThread(const GURL& url) {
 137   // Quote the input scheme to be sure that the command does not have
 138   // parameters unexpected by the external program. This url should already
 139   // have been escaped.
 140   std::string escaped_url = url.spec();
 141   escaped_url.insert(0, "\"");
 142   escaped_url += "\"";
 143
 144   // According to Mozilla in uriloader/exthandler/win/nsOSHelperAppService.cpp:
 145   // "Some versions of windows (Win2k before SP3, Win XP before SP1) crash in
 146   // ShellExecute on long URLs (bug 161357 on bugzilla.mozilla.org). IE 5 and 6
 147   // support URLS of 2083 chars in length, 2K is safe."
 148   const size_t kMaxUrlLength = 2048;
 149   if (escaped_url.length() > kMaxUrlLength) {
 150     NOTREACHED();
 151     return;
 152   }
 153
 154   if (base::win::GetVersion() < base::win::VERSION_WIN7) {
 155     if (!ValidateShellCommandForScheme(url.scheme()))
 156       return;
 157   }
 158
 159   if (reinterpret_cast<ULONG_PTR>(ShellExecuteA(NULL, "open",
 160                                                 escaped_url.c_str(), NULL, NULL,
 161                                                 SW_SHOWNORMAL)) <= 32) {
 162     // We fail to execute the call. We could display a message to the user.
 163     // TODO(nsylvain): we should also add a dialog to warn on errors. See
 164     // bug 1136923.
 165     return;
 166   }
 167 }
 168
 169 void OpenItemViaShellInUtilityProcess(const base::FilePath& full_path,
 170                                       OpenItemType type) {
 171   base::WeakPtr<content::UtilityProcessHost> utility_process_host(
 172       content::UtilityProcessHost::Create(NULL, NULL)->AsWeakPtr());
 173   utility_process_host->SetName(l10n_util::GetStringUTF16(
 174       IDS_UTILITY_PROCESS_FILE_DIALOG_NAME));
 175   utility_process_host->DisableSandbox();
 176   switch (type) {
 177     case OPEN_FILE:
 178       utility_process_host->Send(
 179           new ChromeUtilityMsg_OpenFileViaShell(full_path));
 180       return;
 181
 182     case OPEN_FOLDER:
 183       utility_process_host->Send(
 184           new ChromeUtilityMsg_OpenFolderViaShell(full_path));
 185       return;
 186   }
 187 }
 188
 189 void ActivateDesktopIfNecessary() {
 190   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 191   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH)
 192     chrome::ActivateDesktopHelper(chrome::ASH_KEEP_RUNNING);
 193 }
 194
 195 }  // namespace
 196
 197 void ShowItemInFolder(Profile* profile, const base::FilePath& full_path) {
 198   ActivateDesktopIfNecessary();
 199   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
 200       base::Bind(&ShowItemInFolderOnFileThread, full_path));
 201 }
 202
 203 namespace internal {
 204
 205 void PlatformOpenVerifiedItem(const base::FilePath& path, OpenItemType type) {
 206   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
 207                           base::Bind(&ActivateDesktopIfNecessary));
 208
 209   if (base::FieldTrialList::FindFullName("IsolateShellOperations") ==
 210       "Enabled") {
 211     BrowserThread::PostTask(
 212         BrowserThread::IO, FROM_HERE,
 213         base::Bind(&OpenItemViaShellInUtilityProcess, path, type));
 214   } else {
 215     switch (type) {
 216       case OPEN_FILE:
 217         ui::win::OpenFileViaShell(path);
 218         break;
 219
 220       case OPEN_FOLDER:
 221         ui::win::OpenFolderViaShell(path);
 222         break;
 223     }
 224   }
 225 }
 226
 227 }  // namespace internal
 228
 229 void OpenExternal(Profile* profile, const GURL& url) {
 230   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 231
 232   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH &&
 233       !url.SchemeIsHTTPOrHTTPS())
 234     chrome::ActivateDesktopHelper(chrome::ASH_KEEP_RUNNING);
 235
 236   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
 237                           base::Bind(&OpenExternalOnFileThread, url));
 238 }
 239
 240 }  // namespace platform_util