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


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basic.hxx"
#include <tools/errcode.hxx>
#include <svl/svdde.hxx>
#include "ddectrl.hxx"
#ifndef _SBERRORS_HXX
#include <basic/sberrors.hxx>
#endif

#define DDE_FREECHANNEL	((DdeConnection*)0xffffffff)

#define DDE_FIRSTERR	0x4000
#define DDE_LASTERR		0x4011

static const SbError nDdeErrMap[] =
{
	/* DMLERR_ADVACKTIMEOUT 	  */  0x4000, SbERR_DDE_TIMEOUT,
	/* DMLERR_BUSY 				  */  0x4001, SbERR_DDE_BUSY,
	/* DMLERR_DATAACKTIMEOUT 	  */  0x4002, SbERR_DDE_TIMEOUT,
	/* DMLERR_DLL_NOT_INITIALIZED */  0x4003, SbERR_DDE_ERROR,
	/* DMLERR_DLL_USAGE           */  0x4004, SbERR_DDE_ERROR,
	/* DMLERR_EXECACKTIMEOUT      */  0x4005, SbERR_DDE_TIMEOUT,
	/* DMLERR_INVALIDPARAMETER    */  0x4006, SbERR_DDE_ERROR,
	/* DMLERR_LOW_MEMORY          */  0x4007, SbERR_DDE_ERROR,
	/* DMLERR_MEMORY_ERROR        */  0x4008, SbERR_DDE_ERROR,
	/* DMLERR_NOTPROCESSED        */  0x4009, SbERR_DDE_NOTPROCESSED,
	/* DMLERR_NO_CONV_ESTABLISHED */  0x400a, SbERR_DDE_NO_CHANNEL,
	/* DMLERR_POKEACKTIMEOUT      */  0x400b, SbERR_DDE_TIMEOUT,
	/* DMLERR_POSTMSG_FAILED      */  0x400c, SbERR_DDE_QUEUE_OVERFLOW,
	/* DMLERR_REENTRANCY          */  0x400d, SbERR_DDE_ERROR,
	/* DMLERR_SERVER_DIED         */  0x400e, SbERR_DDE_PARTNER_QUIT,
	/* DMLERR_SYS_ERROR           */  0x400f, SbERR_DDE_ERROR,
	/* DMLERR_UNADVACKTIMEOUT     */  0x4010, SbERR_DDE_TIMEOUT,
	/* DMLERR_UNFOUND_QUEUE_ID    */  0x4011, SbERR_DDE_NO_CHANNEL
};

SbError SbiDdeControl::GetLastErr( DdeConnection* pConv )
{
	if( !pConv )
		return 0;
	long nErr = pConv->GetError();
	if( !nErr )
		return 0;
	if( nErr < DDE_FIRSTERR || nErr > DDE_LASTERR )
		return SbERR_DDE_ERROR;
	return nDdeErrMap[ 2*(nErr - DDE_FIRSTERR) + 1 ];
}

IMPL_LINK_INLINE( SbiDdeControl,Data , DdeData*, pData,
{
    aData = String::CreateFromAscii( (char*)(const void*)*pData );
	return 1;
}
)

SbiDdeControl::SbiDdeControl()
{
	pConvList = new DdeConnections;
	DdeConnection* pPtr = DDE_FREECHANNEL;
	pConvList->Insert( pPtr );
}

SbiDdeControl::~SbiDdeControl()
{
	TerminateAll();
	delete pConvList;
}

sal_Int16 SbiDdeControl::GetFreeChannel()
{
	sal_Int16 nListSize = (sal_Int16)pConvList->Count();
	DdeConnection* pPtr = pConvList->First();
	pPtr = pConvList->Next(); // nullten eintrag ueberspringen
	sal_Int16 nChannel;
	for( nChannel = 1; nChannel < nListSize; nChannel++ )
	{
		if( pPtr == DDE_FREECHANNEL )
			return nChannel;
		pPtr = pConvList->Next();
	}
	pPtr = DDE_FREECHANNEL;
	pConvList->Insert( pPtr, LIST_APPEND );
	return nChannel;
}

SbError SbiDdeControl::Initiate( const String& rService, const String& rTopic,
			sal_Int16& rnHandle )
{
	SbError nErr;
	DdeConnection* pConv = new DdeConnection( rService, rTopic );
	nErr = GetLastErr( pConv );
	if( nErr )
	{
		delete pConv;
		rnHandle = 0;
	}
	else
	{
		sal_Int16 nChannel = GetFreeChannel();
		pConvList->Replace( pConv, (sal_uIntPtr)nChannel );
		rnHandle = nChannel;
	}
	return 0;
}

SbError SbiDdeControl::Terminate( sal_Int16 nChannel )
{
	DdeConnection* pConv = pConvList->GetObject( (sal_uIntPtr)nChannel );
	if( !nChannel || !pConv || pConv == DDE_FREECHANNEL )
		return SbERR_DDE_NO_CHANNEL;
	pConvList->Replace( DDE_FREECHANNEL, (sal_uIntPtr)nChannel );
	delete pConv;
	return 0L;
}

SbError SbiDdeControl::TerminateAll()
{
	sal_Int16 nChannel = (sal_Int16)pConvList->Count();
	while( nChannel )
	{
		nChannel--;
		Terminate( nChannel );
	}

	pConvList->Clear();
	DdeConnection* pPtr = DDE_FREECHANNEL;
	pConvList->Insert( pPtr );

	return 0;
}

SbError SbiDdeControl::Request( sal_Int16 nChannel, const String& rItem, String& rResult )
{
	DdeConnection* pConv = pConvList->GetObject( (sal_uIntPtr)nChannel );
	if( !nChannel || !pConv || pConv == DDE_FREECHANNEL )
		return SbERR_DDE_NO_CHANNEL;

	DdeRequest aRequest( *pConv, rItem, 30000 );
	aRequest.SetDataHdl( LINK( this, SbiDdeControl, Data ) );
	aRequest.Execute();
	rResult = aData;
	return GetLastErr( pConv );
}

SbError SbiDdeControl::Execute( sal_Int16 nChannel, const String& rCommand )
{
	DdeConnection* pConv = pConvList->GetObject( (sal_uIntPtr)nChannel );
	if( !nChannel || !pConv || pConv == DDE_FREECHANNEL )
		return SbERR_DDE_NO_CHANNEL;
	DdeExecute aRequest( *pConv, rCommand, 30000 );
	aRequest.Execute();
	return GetLastErr( pConv );
}

SbError SbiDdeControl::Poke( sal_Int16 nChannel, const String& rItem, const String& rData )
{
	DdeConnection* pConv = pConvList->GetObject( (sal_uIntPtr)nChannel );
	if( !nChannel || !pConv || pConv == DDE_FREECHANNEL )
		return SbERR_DDE_NO_CHANNEL;
	DdePoke aRequest( *pConv, rItem, DdeData(rData), 30000 );
	aRequest.Execute();
	return GetLastErr( pConv );
}