/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the ActiveQt framework of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:BSD$

** You may use this file under the terms of the BSD license as follows:

**

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** modification, are permitted provided that the following conditions are

** met:

**   * Redistributions of source code must retain the above copyright

**     notice, this list of conditions and the following disclaimer.

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**     notice, this list of conditions and the following disclaimer in

**     the documentation and/or other materials provided with the

**     distribution.

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**     products derived from this software without specific prior written

**     permission.

**

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****************************************************************************/

#ifndef QT_NO_WIN_ACTIVEQT

#include <qapplication.h>

#include <qwidget.h>

#include <qt_windows.h>

QT_BEGIN_NAMESPACE

bool qax_ownQApp = false;

HHOOK qax_hhook = 0;

// 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(int bRegister);

extern HRESULT GetClassObject(const GUID &clsid, const GUID &iid, void **ppUnk);

STDAPI DllRegisterServer()

{

    return UpdateRegistry(true);

}

STDAPI DllUnregisterServer()

{

    return UpdateRegistry(false);

}

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 = qApp->allWidgets();

    int count = widgets.count();

    for (int w = 0; w < widgets.count(); ++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);

    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);

    qAxInstance = hInstance;

    qAxIsServer = true;

    if (dwReason == DLL_PROCESS_ATTACH) {

        DisableThreadLibraryCalls(hInstance);

        qAxInit();

    } else if (dwReason == DLL_PROCESS_DETACH) {

        qAxCleanup();

    }

    return true;

}

QT_END_NAMESPACE

#endif // QT_NO_WIN_ACTIVEQT