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