/* -*- 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 "txtcache.hxx"
#include "txtfrm.hxx"
#include "porlay.hxx"

SwTxtLine::SwTxtLine( SwTxtFrm *pFrm, SwParaPortion *pNew ) :
    SwCacheObj( (void*)pFrm ),
    pLine( pNew )
{
}

SwTxtLine::~SwTxtLine()
{
    delete pLine;
}

SwCacheObj *SwTxtLineAccess::NewObj()
{
    return new SwTxtLine( const_cast<SwTxtFrm *>(static_cast<SwTxtFrm const *>(pOwner)) );
}

SwParaPortion *SwTxtLineAccess::GetPara()
{
    SwTxtLine *pRet;
    if ( pObj )
        pRet = static_cast<SwTxtLine*>(pObj);
    else
    {
        pRet = static_cast<SwTxtLine*>(Get());
        const_cast<SwTxtFrm *>(static_cast<SwTxtFrm const *>(pOwner))->SetCacheIdx( pRet->GetCachePos() );
    }
    if ( !pRet->GetPara() )
        pRet->SetPara( new SwParaPortion );
    return pRet->GetPara();
}

SwTxtLineAccess::SwTxtLineAccess( const SwTxtFrm *pOwn ) :
    SwCacheAccess( *SwTxtFrm::GetTxtCache(), pOwn, pOwn->GetCacheIdx() )
{
}

bool SwTxtLineAccess::IsAvailable() const
{
    return pObj && static_cast<SwTxtLine*>(pObj)->GetPara();
}

bool SwTxtFrm::_HasPara() const
{
    SwTxtLine *pTxtLine = static_cast<SwTxtLine*>(SwTxtFrm::GetTxtCache()->
                                            Get( this, GetCacheIdx(), false ));
    if ( pTxtLine )
    {
        if ( pTxtLine->GetPara() )
            return true;
    }
    else
        const_cast<SwTxtFrm*>(this)->nCacheIdx = USHRT_MAX;

    return false;
}

SwParaPortion *SwTxtFrm::GetPara()
{
    if ( GetCacheIdx() != USHRT_MAX )
    {
        SwTxtLine *pLine = static_cast<SwTxtLine*>(SwTxtFrm::GetTxtCache()->
                                        Get( this, GetCacheIdx(), false ));
        if ( pLine )
            return pLine->GetPara();
        else
            nCacheIdx = USHRT_MAX;
    }
    return 0;
}

void SwTxtFrm::ClearPara()
{
    OSL_ENSURE( !IsLocked(), "+SwTxtFrm::ClearPara: this is locked." );
    if ( !IsLocked() && GetCacheIdx() != USHRT_MAX )
    {
        SwTxtLine *pTxtLine = static_cast<SwTxtLine*>(SwTxtFrm::GetTxtCache()->
                                        Get( this, GetCacheIdx(), false ));
        if ( pTxtLine )
        {
            delete pTxtLine->GetPara();
            pTxtLine->SetPara( 0 );
        }
        else
            nCacheIdx = USHRT_MAX;
    }
}

void SwTxtFrm::SetPara( SwParaPortion *pNew, bool bDelete )
{
    if ( GetCacheIdx() != USHRT_MAX )
    {
        // Only change the information, the CacheObj stays there
        SwTxtLine *pTxtLine = static_cast<SwTxtLine*>(SwTxtFrm::GetTxtCache()->
                                        Get( this, GetCacheIdx(), false ));
        if ( pTxtLine )
        {
            if( bDelete )
                delete pTxtLine->GetPara();
            pTxtLine->SetPara( pNew );
        }
        else
        {
            OSL_ENSURE( !pNew, "+SetPara: Losing SwParaPortion" );
            nCacheIdx = USHRT_MAX;
        }
    }
    else if ( pNew )
    {   // Insert a new one
        SwTxtLine *pTxtLine = new SwTxtLine( this, pNew );
        if ( SwTxtFrm::GetTxtCache()->Insert( pTxtLine ) )
            nCacheIdx = pTxtLine->GetCachePos();
        else
        {
            OSL_FAIL( "+SetPara: InsertCache failed." );
        }
    }
}

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