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