/**************************************************************
 * 
 * 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
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 *************************************************************/


#ifndef _SVT_LISTENERITER_HXX
#define _SVT_LISTENERITER_HXX

#include "svl/svldllapi.h"
#include <tools/rtti.hxx>

class SvtListener;
class SvtListenerBase;
class SvtBroadcaster;

//-------------------------------------------------------------------------

class SVL_DLLPUBLIC SvtListenerIter
{
	friend class SvtListenerBase;

	SvtBroadcaster& rRoot;
	SvtListenerBase *pAkt, *pDelNext;

	// for the update of all iterator's, if a listener is added or removed
	// at the same time.
	static SvtListenerIter *pListenerIters;
	SvtListenerIter *pNxtIter;
	TypeId aSrchId;				// fuer First/Next - suche diesen Type

	SVL_DLLPRIVATE static void RemoveListener( SvtListenerBase& rDel,
											   SvtListenerBase* pNext );

public:
	SvtListenerIter( SvtBroadcaster& );
	~SvtListenerIter();

	const SvtBroadcaster& GetBroadcaster() const	{ return rRoot; }
		  SvtBroadcaster& GetBroadcaster() 			{ return rRoot; }

	SvtListener* GoNext();			// to the next
	SvtListener* GoPrev();			// to the previous

	SvtListener* GoStart(); 		// to the start of the list
	SvtListener* GoEnd();			// to the end of the list

	SvtListener* GoRoot(); 			// to the root
	SvtListener* GetCurr() const;	// returns the current

	int IsChanged() const 		{ return pDelNext != pAkt; }

	SvtListener* First( TypeId nType );
	SvtListener* Next();
};


#endif