InitListeners.hpp

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/*
SagaEngine library
Copyright (c) 2002-2006 Skalden Studio AS

This software is provided 'as-is', without any express or implied 
warranty. In no event will the authors be held liable for any 
damages arising from the use of this software.

Permission is granted to distribute the library under the terms of the 
Q Public License version 1.0. Be sure to read and understand the license
before using the library. It should be included here, or you may read it
at http://www.trolltech.com/products/qt/licenses/licensing/qpl

The original version of this library can be located at:
http://www.sagaengine.com/

Rune Myrland
rune@skalden.com
*/


#ifndef InitListeners_hpp
#define InitListeners_hpp

#include "InitListener.hpp"
#include "sim.hpp"
#include "../util/error/Log.hpp"

namespace se_core {

    class _SeCoreExport InitListeners {
        enum { init_PRIORITY_ENGINE, init_ENGINE, init_LEVEL, init_GAME, init_START, init_COUNT };
    public:

        InitListeners()
                : listenerCount_(0), didAlreadyInitEngine_(false) {
            for(int i = 0; i < init_COUNT; ++i) {
                nextEngineInit_[i] = 0;
            }
        }


        void addListener(InitListener &l) {
            AssertFatal(listenerCount_ < MAX_LISTENERS, "Too many listeners. Ajust MAX_LISTENERS.");
            listeners_[ listenerCount_++ ] = &l;
        }


        void removeListener(InitListener &l) {
            for(int i = 0; i < listenerCount_; ++i) {
                if(listeners_[ i ] == &l) {
                    listeners_[ i ] = listeners_[ --listenerCount_ ];
                }
            }
        }

        bool castPriorityInitEngineEvent() {
            int &i = nextEngineInit_[ init_PRIORITY_ENGINE ];
            while(i < listenerCount_) {
                if(!listeners_[ i ]->priorityInitEngineEvent()) {
                    castPriorityCleanupEngineEvent();
                    return false;
                }
                ++i;
            }
            return true;
        }

        void castPriorityCleanupEngineEvent() {
            int &i = nextEngineInit_[ init_PRIORITY_ENGINE ];
            while(i > 0) {
                --i;
                listeners_[ i ]->priorityCleanupEngineEvent();
            }
        }

        bool castInitEngineEvent() {
            int &i = nextEngineInit_[ init_ENGINE ];
            while(i < listenerCount_) {
                if(!listeners_[ i ]->initEngineEvent()) {
                    castCleanupEngineEvent();
                    return false;
                }
                ++i;
            }
            didAlreadyInitEngine_ = true;
            return true;
        }

        void castCleanupEngineEvent() {
            int &i = nextEngineInit_[ init_ENGINE ];
            while(i > 0) {
                --i;
                listeners_[ i ]->cleanupEngineEvent();
            }
        }


        bool castInitLevelEvent() {
            int &i = nextEngineInit_[ init_LEVEL ];
            while(i < listenerCount_) {
                if(!listeners_[ i ]->initLevelEvent()) {
                    castCleanupLevelEvent();
                    return false;
                }
                ++i;
            }
            return true;
        }

        void castCleanupLevelEvent() {
            int &i = nextEngineInit_[ init_LEVEL ];
            while(i > 0) {
                --i;
                listeners_[ i ]->cleanupLevelEvent();
            }
        }


        bool castInitGameEvent() {
            int &i = nextEngineInit_[ init_GAME ];
            while(i < listenerCount_) {
                if(!listeners_[ i ]->initGameEvent()) {
                    castCleanupGameEvent();
                    return false;
                }
                ++i;
            }
            return true;
        }

        void castCleanupGameEvent() {
            int &i = nextEngineInit_[ init_GAME ];
            while(i > 0) {
                --i;
                listeners_[ i ]->cleanupGameEvent();
            }
        }


        bool castStartGameEvent() {
            int &i = nextEngineInit_[ init_START ];
            while(i > 0) {
                --i;
                if(!listeners_[ i ]->startGameEvent()) {
                    castStopGameEvent();
                    return false;
                }
            }
            return true;
        }

        void castStopGameEvent() {
            int &i = nextEngineInit_[ init_START ];
            while(i > 0) {
                --i;
                listeners_[ i ]->stopGameEvent();
            }
        }


        void clear() {
            listenerCount_ = 0;
            didAlreadyInitEngine_ = false;
        }


    private:
        static const int MAX_LISTENERS = 10;
        InitListener* listeners_[ MAX_LISTENERS ];
        short listenerCount_;

        int nextEngineInit_[init_COUNT];
        bool didAlreadyInitEngine_;
    };

}

#endif

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