/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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 *************************************************************/



#ifndef _STGDIR_HXX
#define _STGDIR_HXX

#include "stgavl.hxx"
#include "stgelem.hxx"
#include "stgstrms.hxx"

class StgIo;
class StgEntry;
class StgDirEntry;
class StgDirStrm;

class BaseStorageStream;
class StgDirEntry : public StgAvlNode
{
	friend class StgIterator;
	friend class StgDirStrm;
	StgEntry	 aSave;						// original dir entry
	StgDirEntry*  pUp;						// parent directory
	StgDirEntry*  pDown;					// child directory for storages
	StgDirEntry** ppRoot;					// root of TOC tree
    StgStrm*     pStgStrm; 	                // storage stream
	StgTmpStrm*	 pTmpStrm;					// temporary stream
	StgTmpStrm*  pCurStrm;					// temp stream after commit
	sal_Int32		 nEntry;					// entry # in TOC stream (temp)
	sal_Int32		 nPos;						// current position
	sal_Bool		 bDirty;					// dirty directory entry
	sal_Bool		 bCreated;					// newly created entry
	sal_Bool		 bRemoved;					// removed per Invalidate()
	sal_Bool		 bRenamed;					// renamed
	void		 InitMembers();				// ctor helper
	virtual short Compare( const StgAvlNode* ) const;
	sal_Bool		 StoreStream( StgIo& );		// store the stream
	sal_Bool		 StoreStreams( StgIo& );	// store all streams
	void		 RevertAll();				// revert the whole tree
	sal_Bool		 Strm2Tmp();				// copy stgstream to temp file
	sal_Bool		 Tmp2Strm();				// copy temp file to stgstream
public:
	StgEntry 	 aEntry;					// entry data
	sal_Int32  		 nRefCnt;					// reference count
    StreamMode   nMode;             		// open mode
	sal_Bool		 bTemp;						// sal_True: delete on dir flush
	sal_Bool		 bDirect; 		  			// sal_True: direct mode
	sal_Bool         bZombie;                   // sal_True: Removed From StgIo
	sal_Bool		 bInvalid;					// sal_True: invalid entry
	StgDirEntry( const void* pBuffer, sal_uInt32 nBufferLen, sal_Bool * pbOk );
	StgDirEntry( const StgEntry& );
	~StgDirEntry();

	void Invalidate( sal_Bool=sal_False ); 			// invalidate all open entries
	void Enum( sal_Int32& );					// enumerate entries for iteration
	void DelTemp( sal_Bool );					// delete temporary entries
	sal_Bool Store( StgDirStrm& );				// save entry into dir strm
	sal_Bool IsContained( StgDirEntry* );		// check if subentry

	void SetDirty()  { bDirty = sal_True;     }
	sal_Bool IsDirty();
	void ClearDirty();

	sal_Bool Commit();
	sal_Bool Revert();

	void  OpenStream( StgIo&, sal_Bool=sal_False );		// set up an appropriate stream
	void  Close();
	sal_Int32 GetSize();
	sal_Bool  SetSize( sal_Int32 );
	sal_Int32 Seek( sal_Int32 );
	sal_Int32 Tell() { return nPos; }
	sal_Int32 Read( void*, sal_Int32 );
	sal_Int32 Write( const void*, sal_Int32 );
	void  Copy( StgDirEntry& );
    void  Copy( BaseStorageStream& );
};

class StgDirStrm : public StgDataStrm
{
	friend class StgIterator;
	StgDirEntry* pRoot;							// root of dir tree
	short 		 nEntries;						// entries per page
    void SetupEntry(
        const sal_Int32 n,
        StgDirEntry* pUpper,
        const sal_Int32 nEntryCount,
        const sal_Int32 nDepth);
public: 
	StgDirStrm( StgIo& );
	~StgDirStrm();
	virtual sal_Bool SetSize( sal_Int32 );				// change the size
	sal_Bool		 Store();
	void*	     GetEntry( sal_Int32 n, sal_Bool=sal_False );// get an entry
	StgDirEntry* GetRoot() { return pRoot; }
	StgDirEntry* Find( StgDirEntry&, const String& );
	StgDirEntry* Create( StgDirEntry&, const String&, StgEntryType );
	sal_Bool         Remove( StgDirEntry&, const String& );
	sal_Bool         Rename( StgDirEntry&, const String&, const String& );
	sal_Bool         Move( StgDirEntry&, StgDirEntry&, const String& );
};

class StgIterator : public StgAvlIterator
{
public:
	StgIterator( StgDirEntry& rStg ) : StgAvlIterator( rStg.pDown ) {}
	StgDirEntry* First() { return (StgDirEntry*) StgAvlIterator::First(); }
	StgDirEntry* Next()  { return (StgDirEntry*) StgAvlIterator::Next();  }
	StgDirEntry* Last()  { return (StgDirEntry*) StgAvlIterator::Last();  }
	StgDirEntry* Prev()  { return (StgDirEntry*) StgAvlIterator::Prev();  }
};

#endif