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// Copyright (C) 2015 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <qapplication.h>
#include <private/qcoreapplication_p.h>
#include <qwidget.h>
#include <qdir.h>
#include <qt_windows.h>
#include "qclassfactory_p.h"
QT_BEGIN_NAMESPACE
bool qax_ownQApp = false;
HHOOK qax_hhook = nullptr;
// in qaxserver.cpp
extern wchar_t qAxModuleFilename[MAX_PATH];
extern bool qAxIsServer;
extern ITypeLib *qAxTypeLibrary;
extern unsigned long qAxLockCount();
extern QString qAxInit();
extern void qAxCleanup();
extern HANDLE qAxInstance;
static uint qAxThreadId = 0;
extern HRESULT UpdateRegistry(bool bRegister, bool perUser);
extern HRESULT GetClassObject(const GUID &clsid, const GUID &iid, void **ppUnk);
STDAPI DllRegisterServer()
{
return UpdateRegistry(true, false);
}
STDAPI DllUnregisterServer()
{
return UpdateRegistry(false, false);
}
STDAPI DllInstall(BOOL bInstall, LPCWSTR pszCmdLine) {
bool perUser = false; // per-user (un)registration
if (pszCmdLine) {
if (QStringView(pszCmdLine).compare(u"user", Qt::CaseInsensitive) == 0)
perUser = true;
}
if (bInstall) {
HRESULT hr = UpdateRegistry(true, perUser);
if (FAILED(hr))
UpdateRegistry(false, perUser);
return hr;
} else {
return UpdateRegistry(false, perUser);
}
}
STDAPI DllGetClassObject(const GUID &clsid, const GUID &iid, void** ppv)
{
if (!qAxThreadId)
qAxThreadId = GetCurrentThreadId();
else if (GetCurrentThreadId() != qAxThreadId)
return E_FAIL;
GetClassObject(clsid, iid, ppv);
if (!*ppv)
return CLASS_E_CLASSNOTAVAILABLE;
return S_OK;
}
STDAPI DllCanUnloadNow()
{
if (GetCurrentThreadId() != qAxThreadId)
return S_FALSE;
if (qAxLockCount())
return S_FALSE;
if (!qax_ownQApp)
return S_OK;
// check if qApp still runs widgets (in other DLLs)
QWidgetList widgets = QApplication::allWidgets();
qsizetype count = widgets.size();
for (qsizetype w = 0; w < widgets.size(); ++w) {
// remove all Qt generated widgets
QWidget *widget = widgets.at(w);
if (widget->windowType() == Qt::Desktop || widget->objectName() == QLatin1String("Qt internal tablet widget"))
count--;
}
if (count)
return S_FALSE;
// no widgets left - destroy qApp
if (qax_hhook)
UnhookWindowsHookEx(qax_hhook);
QClassFactory::cleanupCreatedApplication(*qApp);
delete qApp;
qax_ownQApp = false;
// never allow unloading - safety net for Internet Explorer
return S_FALSE;
}
EXTERN_C BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID /* lpvReserved */)
{
GetModuleFileName(hInstance, qAxModuleFilename, MAX_PATH);
// Point QApplication here such that the directory is added to the patch, and qt.conf and
// deployed plugins are found.
QCoreApplicationPrivate::setApplicationFilePath(QDir::cleanPath(QString::fromWCharArray(qAxModuleFilename)));
qAxInstance = hInstance;
qAxIsServer = true;
if (dwReason == DLL_PROCESS_ATTACH) {
DisableThreadLibraryCalls(hInstance);
qAxInit();
} else if (dwReason == DLL_PROCESS_DETACH) {
qAxCleanup();
}
return true;
}
QT_END_NAMESPACE
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