/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include "global.hxx"
#include "classfactory.hxx"
#include "infotips.hxx"
#include "propsheets.hxx"
#include "columninfo.hxx"
#ifdef __MINGW32__
#include <algorithm>
#endif
#include "thumbviewer.hxx"
#include "shlxthdl.hxx"


long CClassFactory::s_ServerLocks = 0;


CClassFactory::CClassFactory(const CLSID& clsid) :
    m_RefCnt(1),
    m_Clsid(clsid)
{
    InterlockedIncrement(&g_DllRefCnt);
}


CClassFactory::~CClassFactory()
{
    InterlockedDecrement(&g_DllRefCnt);
}


// IUnknown methods


HRESULT STDMETHODCALLTYPE CClassFactory::QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject)
{
    *ppvObject = nullptr;

    if (IID_IUnknown == riid || IID_IClassFactory == riid)
    {
        IUnknown* pUnk = this;
        pUnk->AddRef();
        *ppvObject = pUnk;
        return S_OK;
    }

    return E_NOINTERFACE;
}


ULONG STDMETHODCALLTYPE CClassFactory::AddRef()
{
    return InterlockedIncrement(&m_RefCnt);
}


ULONG STDMETHODCALLTYPE CClassFactory::Release()
{
    long refcnt = InterlockedDecrement(&m_RefCnt);

    if (0 == refcnt)
        delete this;

    return refcnt;
}


// IClassFactory methods


HRESULT STDMETHODCALLTYPE CClassFactory::CreateInstance(
            IUnknown __RPC_FAR *pUnkOuter,
            REFIID riid,
            void __RPC_FAR *__RPC_FAR *ppvObject)
{
    if ((pUnkOuter != nullptr))
        return CLASS_E_NOAGGREGATION;

    IUnknown* pUnk = nullptr;

    if (CLSID_PROPERTYSHEET_HANDLER == m_Clsid)
        pUnk = static_cast<IShellExtInit*>(new CPropertySheet());

    else if (CLSID_INFOTIP_HANDLER == m_Clsid)
        pUnk = static_cast<IQueryInfo*>(new CInfoTip());

    else if (CLSID_COLUMN_HANDLER == m_Clsid)
        pUnk = static_cast<IColumnProvider*>(new CColumnInfo());

    else if (CLSID_THUMBVIEWER_HANDLER == m_Clsid)
        pUnk = static_cast<IExtractImage*>(new CThumbviewer());

    if (nullptr == pUnk)
    {
        return E_OUTOFMEMORY;
    }

    HRESULT hr = pUnk->QueryInterface(riid, ppvObject);

    // if QueryInterface failed the component will destroy itself
    pUnk->Release();

    return hr;
}


HRESULT STDMETHODCALLTYPE CClassFactory::LockServer(BOOL fLock)
{
    if (fLock)
        InterlockedIncrement(&s_ServerLocks);
    else
        InterlockedDecrement(&s_ServerLocks);

    return S_OK;
}


bool CClassFactory::IsLocked()
{
    return (s_ServerLocks > 0);
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
