/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * OpenOffice.org - a multi-platform office productivity suite
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
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 *
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 ************************************************************************/
#ifndef _LAYCACHE_HXX
#define _LAYCACHE_HXX
namespace binfilter {


class SwDoc;
class SwLayCacheImpl;

/*************************************************************************
 *                      class SwLayoutCache
 *
 * This class allows to save layout information in the file and it contains
 * this information after loading of a file.
 * Call Read(..) with a stream and the member pLayCacheImpl will
 * read the information from the stream and store it in an internal structur.
 * 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
{
    SwLayCacheImpl *pImpl;
    USHORT nLockCount;
public:
    SwLayoutCache() : pImpl( NULL ), nLockCount( 0 ) {}
    ~SwLayoutCache();

    void ClearImpl();
    sal_Bool IsLocked() const { return nLockCount > 0; }
    USHORT& GetLockCount() { return nLockCount; }
    SwLayCacheImpl *LockImpl()
        { if( nLockCount & 0x8000 ) return NULL;
          if ( pImpl )
            ++nLockCount;
          return pImpl; }
    void UnlockImpl() { --nLockCount; }
};

} //namespace binfilter
#endif

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