src/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/strings/string_util.h"
  17 #include "base/strings/utf_string_conversions.h"
  18 #include "base/win/registry.h"
  19 #include "base/win/scoped_co_mem.h"
  20 #include "base/win/scoped_comptr.h"
  21 #include "base/win/windows_version.h"
  22 #include "chrome/browser/lifetime/application_lifetime.h"
  23 #include "chrome/browser/ui/host_desktop.h"
  24 #include "content/public/browser/browser_thread.h"
  25 #include "ui/base/win/shell.h"
  26 #include "ui/gfx/native_widget_types.h"
  27 #include "url/gurl.h"
  28
  29 using content::BrowserThread;
  30
  31 namespace {
  32
  33 void ShowItemInFolderOnFileThread(const base::FilePath& full_path) {
  34   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
  35   base::FilePath dir = full_path.DirName().AsEndingWithSeparator();
  36   // ParseDisplayName will fail if the directory is "C:", it must be "C:\\".
  37   if (dir.empty())
  38     return;
  39
  40   typedef HRESULT (WINAPI *SHOpenFolderAndSelectItemsFuncPtr)(
  41       PCIDLIST_ABSOLUTE pidl_Folder,
  42       UINT cidl,
  43       PCUITEMID_CHILD_ARRAY pidls,
  44       DWORD flags);
  45
  46   static SHOpenFolderAndSelectItemsFuncPtr open_folder_and_select_itemsPtr =
  47     NULL;
  48   static bool initialize_open_folder_proc = true;
  49   if (initialize_open_folder_proc) {
  50     initialize_open_folder_proc = false;
  51     // The SHOpenFolderAndSelectItems API is exposed by shell32 version 6
  52     // and does not exist in Win2K. We attempt to retrieve this function export
  53     // from shell32 and if it does not exist, we just invoke ShellExecute to
  54     // open the folder thus losing the functionality to select the item in
  55     // the process.
  56     HMODULE shell32_base = GetModuleHandle(L"shell32.dll");
  57     if (!shell32_base) {
  58       NOTREACHED() << " " << __FUNCTION__ << "(): Can't open shell32.dll";
  59       return;
  60     }
  61     open_folder_and_select_itemsPtr =
  62         reinterpret_cast<SHOpenFolderAndSelectItemsFuncPtr>
  63             (GetProcAddress(shell32_base, "SHOpenFolderAndSelectItems"));
  64   }
  65   if (!open_folder_and_select_itemsPtr) {
  66     ShellExecute(NULL, L"open", dir.value().c_str(), NULL, NULL, SW_SHOW);
  67     return;
  68   }
  69
  70   base::win::ScopedComPtr<IShellFolder> desktop;
  71   HRESULT hr = SHGetDesktopFolder(desktop.Receive());
  72   if (FAILED(hr))
  73     return;
  74
  75   base::win::ScopedCoMem<ITEMIDLIST> dir_item;
  76   hr = desktop->ParseDisplayName(NULL, NULL,
  77                                  const_cast<wchar_t *>(dir.value().c_str()),
  78                                  NULL, &dir_item, NULL);
  79   if (FAILED(hr))
  80     return;
  81
  82   base::win::ScopedCoMem<ITEMIDLIST> file_item;
  83   hr = desktop->ParseDisplayName(NULL, NULL,
  84       const_cast<wchar_t *>(full_path.value().c_str()),
  85       NULL, &file_item, NULL);
  86   if (FAILED(hr))
  87     return;
  88
  89   const ITEMIDLIST* highlight[] = { file_item };
  90
  91   hr = (*open_folder_and_select_itemsPtr)(dir_item, arraysize(highlight),
  92                                           highlight, NULL);
  93
  94   if (FAILED(hr)) {
  95     // On some systems, the above call mysteriously fails with "file not
  96     // found" even though the file is there.  In these cases, ShellExecute()
  97     // seems to work as a fallback (although it won't select the file).
  98     if (hr == ERROR_FILE_NOT_FOUND) {
  99       ShellExecute(NULL, L"open", dir.value().c_str(), NULL, NULL, SW_SHOW);
 100     } else {
 101       LOG(WARNING) << " " << __FUNCTION__
 102                    << "(): Can't open full_path = \""
 103                    << full_path.value() << "\""
 104                   << " hr = " << logging::SystemErrorCodeToString(hr);
 105     }
 106   }
 107 }
 108
 109 // Old ShellExecute crashes the process when the command for a given scheme
 110 // is empty. This function tells if it is.
 111 bool ValidateShellCommandForScheme(const std::string& scheme) {
 112   base::win::RegKey key;
 113   std::wstring registry_path = base::ASCIIToWide(scheme) +
 114                                L"\\shell\\open\\command";
 115   key.Open(HKEY_CLASSES_ROOT, registry_path.c_str(), KEY_READ);
 116   if (!key.Valid())
 117     return false;
 118   DWORD size = 0;
 119   key.ReadValue(NULL, NULL, &size, NULL);
 120   if (size <= 2)
 121     return false;
 122   return true;
 123 }
 124
 125 void OpenExternalOnFileThread(const GURL& url) {
 126   // Quote the input scheme to be sure that the command does not have
 127   // parameters unexpected by the external program. This url should already
 128   // have been escaped.
 129   std::string escaped_url = url.spec();
 130   escaped_url.insert(0, "\"");
 131   escaped_url += "\"";
 132
 133   // According to Mozilla in uriloader/exthandler/win/nsOSHelperAppService.cpp:
 134   // "Some versions of windows (Win2k before SP3, Win XP before SP1) crash in
 135   // ShellExecute on long URLs (bug 161357 on bugzilla.mozilla.org). IE 5 and 6
 136   // support URLS of 2083 chars in length, 2K is safe."
 137   const size_t kMaxUrlLength = 2048;
 138   if (escaped_url.length() > kMaxUrlLength) {
 139     NOTREACHED();
 140     return;
 141   }
 142
 143   if (base::win::GetVersion() < base::win::VERSION_WIN7) {
 144     if (!ValidateShellCommandForScheme(url.scheme()))
 145       return;
 146   }
 147
 148   if (reinterpret_cast<ULONG_PTR>(ShellExecuteA(NULL, "open",
 149                                                 escaped_url.c_str(), NULL, NULL,
 150                                                 SW_SHOWNORMAL)) <= 32) {
 151     // We fail to execute the call. We could display a message to the user.
 152     // TODO(nsylvain): we should also add a dialog to warn on errors. See
 153     // bug 1136923.
 154     return;
 155   }
 156 }
 157
 158 }  // namespace
 159
 160 namespace platform_util {
 161
 162 void ShowItemInFolder(Profile* profile, const base::FilePath& full_path) {
 163   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 164
 165   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH)
 166     chrome::ActivateDesktopHelper(chrome::ASH_KEEP_RUNNING);
 167
 168   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
 169       base::Bind(&ShowItemInFolderOnFileThread, full_path));
 170 }
 171
 172 void OpenItem(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(
 179       BrowserThread::FILE, FROM_HERE,
 180       base::Bind(base::IgnoreResult(&ui::win::OpenItemViaShell), full_path));
 181 }
 182
 183 void OpenExternal(Profile* profile, const GURL& url) {
 184   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 185
 186   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH &&
 187       !url.SchemeIsHTTPOrHTTPS())
 188     chrome::ActivateDesktopHelper(chrome::ASH_KEEP_RUNNING);
 189
 190   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
 191                           base::Bind(&OpenExternalOnFileThread, url));
 192 }
 193
 194 #if !defined(USE_AURA)
 195 gfx::NativeWindow GetTopLevel(gfx::NativeView view) {
 196   return ::GetAncestor(view, GA_ROOT);
 197 }
 198
 199 gfx::NativeView GetParent(gfx::NativeView view) {
 200   return ::GetParent(view);
 201 }
 202
 203 bool IsWindowActive(gfx::NativeWindow window) {
 204   return ::GetForegroundWindow() == window;
 205 }
 206
 207 void ActivateWindow(gfx::NativeWindow window) {
 208   ::SetForegroundWindow(window);
 209 }
 210
 211 bool IsVisible(gfx::NativeView view) {
 212   // MSVC complains if we don't include != 0.
 213   return ::IsWindowVisible(view) != 0;
 214 }
 215 #endif
 216
 217 }  // namespace platform_util