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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwindowsservices.h"
#include <QtCore/qt_windows.h>
#include <QtCore/qurl.h>
#include <QtCore/qdebug.h>
#include <QtCore/qdir.h>
#include <QtCore/qscopedpointer.h>
#include <QtCore/qthread.h>
#include <QtCore/private/qwinregistry_p.h>
#include <QtCore/private/qfunctions_win_p.h>
#include <shlobj.h>
#include <shlwapi.h>
#include <intshcut.h>
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
enum { debug = 0 };
class QWindowsShellExecuteThread : public QThread
{
public:
explicit QWindowsShellExecuteThread(const wchar_t *operation, const wchar_t *file,
const wchar_t *parameters)
: m_operation(operation)
, m_file(file)
, m_parameters(parameters) { }
void run() override
{
QComHelper comHelper;
if (comHelper.isValid())
m_result = ShellExecute(nullptr, m_operation, m_file, m_parameters, nullptr,
SW_SHOWNORMAL);
}
HINSTANCE result() const { return m_result; }
private:
HINSTANCE m_result = nullptr;
const wchar_t *m_operation;
const wchar_t *m_file;
const wchar_t *m_parameters;
};
static QString msgShellExecuteFailed(const QUrl &url, quintptr code)
{
QString result;
QTextStream(&result) <<"ShellExecute '" << url.toString() << "' failed (error " << code << ").";
return result;
}
// Retrieve the web browser and open the URL. This should be used for URLs with
// fragments which don't work when using ShellExecute() directly (QTBUG-14460,
// QTBUG-55300).
static bool openWebBrowser(const QUrl &url)
{
WCHAR browserExecutable[MAX_PATH] = {};
const wchar_t operation[] = L"open";
DWORD browserExecutableSize = MAX_PATH;
if (FAILED(AssocQueryString(0, ASSOCSTR_EXECUTABLE, L"http", operation,
browserExecutable, &browserExecutableSize))) {
return false;
}
QString browser = QString::fromWCharArray(browserExecutable, browserExecutableSize - 1);
// Workaround for "old" MS Edge entries. Instead of LaunchWinApp.exe we can just use msedge.exe
if (browser.contains("LaunchWinApp.exe"_L1, Qt::CaseInsensitive))
browser = "msedge.exe"_L1;
const QString urlS = url.toString(QUrl::FullyEncoded);
// Run ShellExecute() in a thread since it may spin the event loop.
// Prevent it from interfering with processing of posted events (QTBUG-85676).
QWindowsShellExecuteThread thread(operation,
reinterpret_cast<const wchar_t *>(browser.utf16()),
reinterpret_cast<const wchar_t *>(urlS.utf16()));
thread.start();
thread.wait();
const auto result = reinterpret_cast<quintptr>(thread.result());
if (debug)
qDebug() << __FUNCTION__ << urlS << QString::fromWCharArray(browserExecutable) << result;
// ShellExecute returns a value greater than 32 if successful
if (result <= 32) {
qWarning("%s", qPrintable(msgShellExecuteFailed(url, result)));
return false;
}
return true;
}
static inline bool shellExecute(const QUrl &url)
{
const QString nativeFilePath = url.isLocalFile() && !url.hasFragment() && !url.hasQuery()
? QDir::toNativeSeparators(url.toLocalFile())
: url.toString(QUrl::FullyEncoded);
// Run ShellExecute() in a thread since it may spin the event loop.
// Prevent it from interfering with processing of posted events (QTBUG-85676).
QWindowsShellExecuteThread thread(nullptr,
reinterpret_cast<const wchar_t *>(nativeFilePath.utf16()),
nullptr);
thread.start();
thread.wait();
const auto result = reinterpret_cast<quintptr>(thread.result());
// ShellExecute returns a value greater than 32 if successful
if (result <= 32) {
qWarning("%s", qPrintable(msgShellExecuteFailed(url, result)));
return false;
}
return true;
}
// Retrieve the commandline for the default mail client. It contains a
// placeholder %1 for the URL. The default key used below is the
// command line for the mailto: shell command.
static inline QString mailCommand()
{
enum { BufferSize = sizeof(wchar_t) * MAX_PATH };
const wchar_t mailUserKey[] = L"Software\\Microsoft\\Windows\\Shell\\Associations\\UrlAssociations\\mailto\\UserChoice";
// Check if user has set preference, otherwise use default.
QString keyName = QWinRegistryKey(HKEY_CURRENT_USER, mailUserKey)
.stringValue( L"Progid");
const auto mailto = keyName.isEmpty() ? "mailto"_L1 : QLatin1StringView();
keyName += mailto + "\\Shell\\Open\\Command"_L1;
if (debug)
qDebug() << __FUNCTION__ << "keyName=" << keyName;
const QString command = QWinRegistryKey(HKEY_CLASSES_ROOT, keyName).stringValue(L"");
// QTBUG-57816: As of Windows 10, if there is no mail client installed, an entry like
// "rundll32.exe .. url.dll,MailToProtocolHandler %l" is returned. Launching it
// silently fails or brings up a broken dialog after a long time, so exclude it and
// fall back to ShellExecute() which brings up the URL association dialog.
if (command.isEmpty() || command.contains(u",MailToProtocolHandler"))
return QString();
wchar_t expandedCommand[MAX_PATH] = {0};
return ExpandEnvironmentStrings(reinterpret_cast<const wchar_t *>(command.utf16()),
expandedCommand, MAX_PATH)
? QString::fromWCharArray(expandedCommand) : command;
}
static inline bool launchMail(const QUrl &url)
{
QString command = mailCommand();
if (command.isEmpty()) {
qWarning("Cannot launch '%ls': There is no mail program installed.", qUtf16Printable(url.toString()));
return false;
}
// Fix mail launch if no param is expected in this command.
if (command.indexOf("%1"_L1) < 0) {
qWarning() << "The mail command lacks the '%1' parameter.";
return false;
}
//Make sure the path for the process is in quotes
const QChar doubleQuote = u'"';
if (!command.startsWith(doubleQuote)) {
const int exeIndex = command.indexOf(".exe "_L1, 0, Qt::CaseInsensitive);
if (exeIndex != -1) {
command.insert(exeIndex + 4, doubleQuote);
command.prepend(doubleQuote);
}
}
// Pass the url as the parameter. Should use QProcess::startDetached(),
// but that cannot handle a Windows command line [yet].
command.replace("%1"_L1, url.toString(QUrl::FullyEncoded));
if (debug)
qDebug() << __FUNCTION__ << "Launching" << command;
//start the process
PROCESS_INFORMATION pi;
ZeroMemory(&pi, sizeof(pi));
STARTUPINFO si;
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
if (!CreateProcess(nullptr, reinterpret_cast<wchar_t *>(const_cast<ushort *>(command.utf16())),
nullptr, nullptr, FALSE, 0, nullptr, nullptr, &si, &pi)) {
qErrnoWarning("Unable to launch '%ls'", qUtf16Printable(command));
return false;
}
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
return true;
}
bool QWindowsServices::openUrl(const QUrl &url)
{
const QString scheme = url.scheme();
if (scheme == u"mailto" && launchMail(url))
return true;
return url.isLocalFile() && url.hasFragment()
? openWebBrowser(url) : shellExecute(url);
}
bool QWindowsServices::openDocument(const QUrl &url)
{
return shellExecute(url);
}
QT_END_NAMESPACE
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