classfactory.cxx

Go to the documentation of this file.

/* -*- 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>
#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 = 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: */