ConnectionHandler.hxx

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/*
 * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef __CONNECTIONHANDLER__
#define __CONNECTIONHANDLER__

#include <list>
#include <utility>
#include "Connection.hxx"

namespace SigSlot
{
        class Slot;

        template < class SignalType >
        class ConnectionHandler
        {
        public:
                typedef typename SignalType::tCallbackType                 tCallbackType;
                typedef typename SignalType::tConnectionId                 tConnectionId;

                struct tCallback
                {
                        tConnectionId  mConnection;
                        Slot*          mSlot;
                        tCallbackType  mCallback;

                        tCallback( tConnectionId id, Slot* slot, tCallbackType cb )
                                : mConnection( id ), mSlot( slot ), mCallback( cb )
                        {
                        }
                };

                typedef tCallbackType*                                     tCallbackPtr;

                typedef std::list<tCallbackPtr>                            tCallList;

                typedef typename std::list<tCallbackPtr >::iterator        tCallIterator;

                typedef std::list<tCallback>                               tCallbackList;

                typedef typename std::list<tCallback>::iterator            tCbListIterator;

                typedef typename std::list<tCallback>::const_iterator      const_tCbListIterator;


        public:
                void AddCallback( tConnectionId pConnection, Slot* slot, tCallbackType cb )
                {
                        mCallbacks.push_back( tCallback( pConnection, slot, cb ) );
                }
                

                bool HasNoCallbacks( ) const
                {
                        return mCallbacks.empty();
                }
                
                tCallList& GetCalls( )
                {
                        mCalls.clear();
                                
                        tCbListIterator i   = mCallbacks.begin();
                        tCbListIterator end = mCallbacks.end();
                                
                        while ( i!=end)
                        {
                                mCalls.push_back( &(i->mCallback) );
                                i++;
                        }
                                
                        return mCalls;
                }
                
                void RemoveCall(  tConnectionId id )
                {
                        tCbListIterator i = mCallbacks.begin();
                        tCbListIterator end = mCallbacks.end();

                        while ( i!=end )
                        {
                                if ( i->mConnection == id )
                                {
                                        mCallbacks.erase( i );
                                        break;
                                }
                                i++;
                        }
                }
                
                void DestroyConnections()
                {
                        tCbListIterator elem;

                        while ( !mCallbacks.empty() )
                        {
                                elem = mCallbacks.begin();

                                elem->mSlot->Unbind( elem->mConnection );
                        }
                }

        private:
                
                tCallList       mCalls;      
                tCallbackList   mCallbacks;  
        };

}

#endif //ConnectionHandler.hxx