/* -*- 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 <unotools/componentresmodule.hxx>
#include <tools/resmgr.hxx>
#include <osl/diagnose.h>
#include <rtl/strbuf.hxx>

namespace utl
{

    //= OComponentResModuleImpl

    /** PIMPL-class for OComponentResourceModule

        not threadsafe!
    */
    class OComponentResModuleImpl
    {
    private:
        ResMgr*         m_pResources;
        bool            m_bInitialized;
        OString  m_sResFilePrefix;

        OComponentResModuleImpl(const OComponentResModuleImpl&) = delete;
        OComponentResModuleImpl& operator=(const OComponentResModuleImpl&) = delete;

    public:
        explicit OComponentResModuleImpl( const OString& _rResFilePrefix )
            :m_pResources( nullptr )
            ,m_bInitialized( false )
            ,m_sResFilePrefix( _rResFilePrefix )
        {
        }

        ~OComponentResModuleImpl()
        {
            freeResManager();
        }

        /** releases our resource manager
        */
        void freeResManager();

        /** retrieves our resource manager
        */
        ResMgr* getResManager();
    };

    void OComponentResModuleImpl::freeResManager()
    {
        delete m_pResources, m_pResources = nullptr;
        m_bInitialized = false;
    }

    ResMgr* OComponentResModuleImpl::getResManager()
    {
        if ( !m_pResources && !m_bInitialized )
        {
            // create a manager with a fixed prefix
            OString aMgrName = m_sResFilePrefix;

            m_pResources = ResMgr::CreateResMgr( aMgrName.getStr() );
            OSL_ENSURE( m_pResources,
                    OStringBuffer( "OModuleImpl::getResManager: could not create the resource manager (file name: " )
                .append(aMgrName)
                .append(")!").getStr() );

            m_bInitialized = true;
        }
        return m_pResources;
    }

    //= OComponentResourceModule

    OComponentResourceModule::OComponentResourceModule( const OString& _rResFilePrefix )
        :BaseClass()
        ,m_pImpl( new OComponentResModuleImpl( _rResFilePrefix ) )
    {
    }

    OComponentResourceModule::~OComponentResourceModule()
    {
    }

    ResMgr* OComponentResourceModule::getResManager()
    {
        ::osl::MutexGuard aGuard( m_aMutex );
        return m_pImpl->getResManager();
    }

    void OComponentResourceModule::onLastClient()
    {
        m_pImpl->freeResManager();
        BaseClass::onLastClient();
    }

} // namespace utl

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