/* -*- 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 .
*/
#ifndef INCLUDED_SW_SOURCE_CORE_INC_LAYCACHE_HXX
#define INCLUDED_SW_SOURCE_CORE_INC_LAYCACHE_HXX
#include <sal/types.h>
#include <memory>
class SwDoc;
class SwLayCacheImpl;
class SvStream;
/*
* This class allows to save layout information in the file and it contains
* this information after loading of a file .
* Call Write ( . . ) with a stream and the document to save and the page break
* information of the document will be written .
* Call Read ( . . ) with a stream and the member pLayCacheImpl will
* read the information from the stream and store it in an internal structure .
* There ' s a simple locking mechanism at these classes ,
* if somebody reads the information , he increments the lock count by 1 ,
* during the Read ( . . ) function the lock count will set to $ 8000 .
*/
class SwLayoutCache
{
std::unique_ptr<SwLayCacheImpl> m_pImpl;
sal_uInt16 m_nLockCount;
public :
SwLayoutCache();
~SwLayoutCache();
void Read( SvStream &rStream );
static void Write( SvStream &rStream, const SwDoc& rDoc );
void ClearImpl();
bool IsLocked() const { return m_nLockCount > 0 ; }
sal_uInt16& GetLockCount() { return m_nLockCount; }
SwLayCacheImpl *LockImpl()
{ if ( m_nLockCount & 0 x8000 ) return nullptr;
if ( m_pImpl )
++m_nLockCount;
return m_pImpl.get(); }
void UnlockImpl() { --m_nLockCount; }
#ifdef DBG_UTIL
bool CompareLayout( const SwDoc& rDoc ) const ;
#endif
};
#endif
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