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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/platform_util.h"
#include <commdlg.h>
#include <dwmapi.h>
#include <shellapi.h>
#include <shlobj.h>
#include "app/gfx/native_widget_types.h"
#include "app/win_util.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/registry.h"
#include "base/scoped_comptr_win.h"
#include "base/string_util.h"
#include "googleurl/src/gurl.h"
namespace platform_util {
void ShowItemInFolder(const FilePath& full_path) {
FilePath dir = full_path.DirName();
// ParseDisplayName will fail if the directory is "C:", it must be "C:\\".
if (dir.value() == L"" || !file_util::EnsureEndsWithSeparator(&dir))
return;
typedef HRESULT (WINAPI *SHOpenFolderAndSelectItemsFuncPtr)(
PCIDLIST_ABSOLUTE pidl_Folder,
UINT cidl,
PCUITEMID_CHILD_ARRAY pidls,
DWORD flags);
static SHOpenFolderAndSelectItemsFuncPtr open_folder_and_select_itemsPtr =
NULL;
static bool initialize_open_folder_proc = true;
if (initialize_open_folder_proc) {
initialize_open_folder_proc = false;
// The SHOpenFolderAndSelectItems API is exposed by shell32 version 6
// and does not exist in Win2K. We attempt to retrieve this function export
// from shell32 and if it does not exist, we just invoke ShellExecute to
// open the folder thus losing the functionality to select the item in
// the process.
HMODULE shell32_base = GetModuleHandle(L"shell32.dll");
if (!shell32_base) {
NOTREACHED();
return;
}
open_folder_and_select_itemsPtr =
reinterpret_cast<SHOpenFolderAndSelectItemsFuncPtr>
(GetProcAddress(shell32_base, "SHOpenFolderAndSelectItems"));
}
if (!open_folder_and_select_itemsPtr) {
ShellExecute(NULL, _T("open"), dir.value().c_str(), NULL, NULL, SW_SHOW);
return;
}
ScopedComPtr<IShellFolder> desktop;
HRESULT hr = SHGetDesktopFolder(desktop.Receive());
if (FAILED(hr))
return;
win_util::CoMemReleaser<ITEMIDLIST> dir_item;
hr = desktop->ParseDisplayName(NULL, NULL,
const_cast<wchar_t *>(dir.value().c_str()),
NULL, &dir_item, NULL);
if (FAILED(hr))
return;
win_util::CoMemReleaser<ITEMIDLIST> file_item;
hr = desktop->ParseDisplayName(NULL, NULL,
const_cast<wchar_t *>(full_path.value().c_str()),
NULL, &file_item, NULL);
if (FAILED(hr))
return;
const ITEMIDLIST* highlight[] = {
{file_item},
};
(*open_folder_and_select_itemsPtr)(dir_item, arraysize(highlight),
highlight, NULL);
}
void OpenItem(const FilePath& full_path) {
win_util::OpenItemViaShell(full_path);
}
void OpenExternal(const GURL& url) {
// Quote the input scheme to be sure that the command does not have
// parameters unexpected by the external program. This url should already
// have been escaped.
std::string escaped_url = url.spec();
escaped_url.insert(0, "\"");
escaped_url += "\"";
// According to Mozilla in uriloader/exthandler/win/nsOSHelperAppService.cpp:
// "Some versions of windows (Win2k before SP3, Win XP before SP1) crash in
// ShellExecute on long URLs (bug 161357 on bugzilla.mozilla.org). IE 5 and 6
// support URLS of 2083 chars in length, 2K is safe."
const size_t kMaxUrlLength = 2048;
if (escaped_url.length() > kMaxUrlLength) {
NOTREACHED();
return;
}
RegKey key;
std::wstring registry_path = ASCIIToWide(url.scheme()) +
L"\\shell\\open\\command";
key.Open(HKEY_CLASSES_ROOT, registry_path.c_str());
if (key.Valid()) {
DWORD size = 0;
key.ReadValue(NULL, NULL, &size);
if (size <= 2) {
// ShellExecute crashes the process when the command is empty.
// We check for "2" because it always returns the trailing NULL.
// TODO(nsylvain): we should also add a dialog to warn on errors. See
// bug 1136923.
return;
}
}
if (reinterpret_cast<ULONG_PTR>(ShellExecuteA(NULL, "open",
escaped_url.c_str(), NULL, NULL,
SW_SHOWNORMAL)) <= 32) {
// We fail to execute the call. We could display a message to the user.
// TODO(nsylvain): we should also add a dialog to warn on errors. See
// bug 1136923.
return;
}
}
gfx::NativeWindow GetTopLevel(gfx::NativeView view) {
return GetAncestor(view, GA_ROOT);
}
string16 GetWindowTitle(gfx::NativeWindow window_handle) {
std::wstring result;
int length = ::GetWindowTextLength(window_handle) + 1;
::GetWindowText(window_handle, WriteInto(&result, length), length);
return WideToUTF16(result);
}
bool IsWindowActive(gfx::NativeWindow window) {
return ::GetForegroundWindow() == window;
}
bool IsVisible(gfx::NativeView view) {
// MSVC complains if we don't include != 0.
return ::IsWindowVisible(view) != 0;
}
} // namespace platform_util
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