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