www.pudn.com > pueblo.zip > ChDispat.cpp

/*---------------------------------------------------------------------------- 
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    The contents of this file are subject to the Andromedia Public 
	License Version 1.0 (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.andromedia.com/APL/ 
 
    Software distributed under the License is distributed on an 
	"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 
	implied. See the License for the specific language governing 
	rights and limitations under the License. 
 
    The Original Code is Pueblo client code, released November 4, 1998. 
 
    The Initial Developer of the Original Code is Andromedia Incorporated. 
	Portions created by Andromedia are Copyright (C) 1998 Andromedia 
	Incorporated.  All Rights Reserved. 
 
	Andromedia Incorporated                         415.365.6700 
	818 Mission Street - 2nd Floor                  415.365.6701 fax 
	San Francisco, CA 94103 
 
    Contributor(s): 
	-------------------------------------------------------------------------- 
	   Chaco team:  Dan Greening, Glenn Crocker, Jim Doubek, 
	                Coyote Lussier, Pritham Shetty. 
 
					Wrote and designed original codebase. 
 
------------------------------------------------------------------------------ 
 
	This file contains the implementation of the ChDispatcher class. 
 
----------------------------------------------------------------------------*/ 
 
// $Header: /home/cvs/chaco/api/ChDispat.cpp,v 2.2 1996/03/07 21:16:41 pritham Exp $ 
 
#include "headers.h" 
#include  
#include  
#include  
#include  
 
ChDispatcher::ChDispatcher( ChCore* pCore, const ChModuleID idModule, 
							const ChMsgHandler defHandler ) : 
		m_pCore( pCore ), 
		m_defHandler( defHandler ), 
		m_idModule( idModule ), 
		m_pMainInfo( 0 ) 
{ 
	ASSERT( m_pCore );	 
											// Register this new dispatcher 
 
	m_pCore->RegisterDispatcher( m_idModule, this ); 
} 
 
ChDispatcher::~ChDispatcher() 
{											// Unregister the dispatcher 
 
	m_pCore->UnregisterDispatcher( m_idModule ); 
} 
 
void ChDispatcher::AddHandler( chint32 lMessage, const ChMsgHandler handler ) 
{ 
	ChMsgHandler*	pHandler; 
											/* First check to see if a 
												record exists */ 
 
	if (pHandler = (ChMsgHandler*)m_handlerTree.Find( lMessage )) 
	{ 
											/* The message was found.  We'll 
												update the handler */ 
		*pHandler = handler; 
	} 
	else 
	{										/* The message was not found, so 
												add it */ 
 
		m_handlerTree.Insert( lMessage, (chparam)handler ); 
	} 
} 
 
void ChDispatcher::AddHandler( const ChMsgHandlerDesc* pHandlerDescs, 
								chint16 sCount ) 
{ 
	chint16					sLoop; 
	const ChMsgHandlerDesc	*pCurr = pHandlerDescs; 
 
	for (sLoop = 0; sLoop < sCount; sLoop++) 
	{ 
		AddHandler( pCurr->lMessage, pCurr->handler ); 
		pCurr++; 
	} 
} 
 
 
chparam ChDispatcher::Dispatch( ChMsg &msg ) 
{ 
	ChMsgHandler*	pHandler; 
	chparam			retVal; 
	chint32			lMessage = msg.GetMessage(); 
 
	pHandler = (ChMsgHandler*)m_handlerTree.Find( lMessage ); 
 
											/* If we don't have the pMainInfo 
												information, look for it */ 
	if (0 == m_pMainInfo) 
	{ 
		m_pMainInfo = m_pCore->GetMainInfo( m_idModule ); 
 
		ASSERT( m_pMainInfo );				// Should not be zero at this point 
	} 
											// Call the handler 
	if (pHandler) 
	{ 
		retVal = (*pHandler)( msg, m_pMainInfo ); 
	} 
	else 
	{ 
		retVal = m_defHandler( msg, m_pMainInfo ); 
	} 
											/* Don't do anything after calling 
												the handler, as CH_MSG_TERM 
												probably causes the handler to 
												be deleted, and it will no 
												longer be valid */ 
 
	return( retVal ); 
} 
 
 
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