sequencecontainer.cpp

// © Copyright 2010 - 2016 BlackTopp Studios Inc.
/* This file is part of The Mezzanine Engine.

    The Mezzanine Engine 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 3 of the License, or
    (at your option) any later version.

    The Mezzanine Engine 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 The Mezzanine Engine.  If not, see <http://www.gnu.org/licenses/>.
*/
/* The original authors have included a copy of the license specified above in the
   'Docs' folder. See 'gpl.txt'
*/
/* We welcome the use of the Mezzanine engine to anyone, including companies who wish to
   Build professional software and charge for their product.

   However there are some practical restrictions, so if your project involves
   any of the following you should contact us and we will try to work something
   out:
    - DRM or Copy Protection of any kind(except Copyrights)
    - Software Patents You Do Not Wish to Freely License
    - Any Kind of Linking to Non-GPL licensed Works
    - Are Currently In Violation of Another Copyright Holder's GPL License
    - If You want to change our code and not add a few hundred MB of stuff to
        your distribution

   These and other limitations could cause serious legal problems if you ignore
   them, so it is best to simply contact us or the Free Software Foundation, if
   you have any questions.

   Joseph Toppi - toppij@gmail.com
   John Blackwood - makoenergy02@gmail.com
*/
#ifndef _inputsequencecontainer_cpp
#define _inputsequencecontainer_cpp

#include "Input/sequencecontainer.h"
#include "timer.h"
#include "exception.h"

#include <limits>

namespace Mezzanine
{
    namespace Input
    {
        SequenceContainer::SequenceContainer() :
            MaxSequenceSize(0),
            DeviceIndex(std::numeric_limits<UInt32>::max()),
            SequencedInputs(MetaCode())
        {
            this->SequenceTimer = new Timer();
            this->SequenceTimer->SetCurrentTimeInMilliseconds(300);
            this->SequenceTimer->SetCountMode(Mezzanine::CM_CountDown);
        }

        SequenceContainer::SequenceContainer(const UInt32& Device) :
            MaxSequenceSize(0),
            DeviceIndex(Device),
            SequencedInputs(MetaCode())
        {
            this->SequenceTimer = new Timer();
            this->SequenceTimer->SetCurrentTimeInMilliseconds(300);
            this->SequenceTimer->SetCountMode(Mezzanine::CM_CountDown);
        }

        SequenceContainer::~SequenceContainer()
        {
            delete this->SequenceTimer;
            this->SequencedInputs.clear();
        }

        void SequenceContainer::VerifyInputSequence(const MetaCodeContainer& Codes) const
        {
            const Input::MetaCode NullCode;
            if( Codes.size() < 3 ) {
                MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION,"Attempting to add a Sequenced Input that is less then 3 MetaCodes long(including the Null MetaCode).  "
                                                                       "A sequence with only one(or less) actual MetaCode isn't a sequence.");
            }
            if( NullCode != Codes.back() )
                { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION,"Attempting to add a Sequenced Input that is not terminated with a null MetaCode."); }
        }

        void SequenceContainer::VerifyInputID(const Int32& ID) const
        {
            if( std::numeric_limits<Int32>::max() == ID )
                { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION,"Attempting to use max value of Int32 as an ID for an input sequence.  This value is reserved for error conditions."); }
        }

        MetaCode SequenceContainer::ProcessSequence(MetaCodeIterator First, MetaCodeIterator OneAfterLast)
        {
            // Set up our data
            MetaCode Ret;
            MetaCodeContainer Key(this->CurrSequenceCache.begin(),this->CurrSequenceCache.end());
            Key.push_back(this->SequencedInputs.endSymbol());
            // Do the actual search
            SequencedInputIterator SeqIt = this->SequencedInputs.find(Key);
            // Return a "Null" metacode if nothing was found
            if( SeqIt == this->SequencedInputs.end() ) {
                return Ret;
            }else{
                Ret.SetCode(Input::COMPOUNDINPUT_CUSTOMSEQUENCE);
                Ret.SetMetaValue( *(*SeqIt).second );
                Ret.SetDeviceIndex(this->DeviceIndex);
                return Ret;
            }
        }

        ///////////////////////////////////////////////////////////////////////////////
        // Sequenced Input Management

        void SequenceContainer::AddInputSequence(const MetaCodeContainer& Codes, const Int32& SequenceID)
        {
            this->VerifyInputSequence(Codes);
            this->VerifyInputID(SequenceID);
            this->SequencedInputs.insert(Codes,SequenceID);
            if( this->MaxSequenceSize < Codes.size() - 1 )
                this->MaxSequenceSize = Codes.size() - 1;
        }

        Boole SequenceContainer::InputSequenceExists(const MetaCodeContainer& Codes)
        {
            this->VerifyInputSequence(Codes);
            return this->SequencedInputs.hasKey(Codes);
        }

        Int32 SequenceContainer::GetIDofInputSequence(const MetaCodeContainer& Codes)
        {
            this->VerifyInputSequence(Codes);
            SequencedInputIterator SqIt = this->SequencedInputs.find(Codes);
            if( SqIt != this->SequencedInputs.end() ) return *(SqIt->second);
            else return std::numeric_limits<Int32>::max();

            /*UInt32* Ret = SequencedInputs.get(Codes);
            if(Ret) return *Ret;
            else return ULONG_MAX;// */
        }

        void SequenceContainer::RemoveInputSequence(const MetaCodeContainer& Codes)
        {
            this->VerifyInputSequence(Codes);
            this->SequencedInputs.erase(Codes);
        }

        void SequenceContainer::RemoveAllInputSequences()
        {
            this->SequencedInputs.clear();
        }

        ///////////////////////////////////////////////////////////////////////////////
        // Utility

        UInt32 SequenceContainer::GetNumInputSequences() const
        {
            return static_cast<UInt32>(this->SequencedInputs.size());
        }

        void SequenceContainer::Update(const MetaCodeContainer& NormalCodes, MetaCodeContainer& SequenceCodes)
        {
            // Set up our compare data
            const MetaCode NullMetaCode;
            // Escape early if we have nothing to do
            if(this->SequencedInputs.empty())
                return;

            // Check our timer and clear our cache if it's been long enough since the last input
            if( this->SequenceTimer->IsStopped() <= 0 ) {
                this->CurrSequenceCache.clear();
            }else{
                this->SequenceTimer->Reset(300 * 1000);
            }

            // Perform our per-code processing
            for( ConstMetaCodeIterator MCIt = NormalCodes.begin() ; MCIt != NormalCodes.end() ; ++MCIt )
            {
                if( this->CurrSequenceCache.empty() ) {
                    MetaCodeContainer TestVec;
                    TestVec.push_back( (*MCIt) );
                    TestVec.push_back(NullMetaCode);
                    SequencedInputIterator SeqIt = this->SequencedInputs.startsWith(TestVec);
                    if( SeqIt != this->SequencedInputs.end() ) {
                        this->CurrSequenceCache.push_back( (*MCIt) );
                        this->SequenceTimer->Start();
                    }
                }else{
                    this->CurrSequenceCache.push_back( (*MCIt) );
                    if( this->MaxSequenceSize == this->CurrSequenceCache.size() ) {
                        // Commented out the line below since we shouldn't ever encounter a case where the size is more then 1 greater, since we process one MetaCode at a time
                        //MetaCodeContainer SwapVec(CurrSequenceCache.begin() + ( CurrSequenceCache.size() - MaxSequenceSize ),CurrSequenceCache.end());
                        this->CurrSequenceCache.erase(this->CurrSequenceCache.begin());
                    }else if( this->MaxSequenceSize < this->CurrSequenceCache.size() ) {
                        MEZZ_EXCEPTION(ExceptionBase::INVALID_STATE_EXCEPTION,"Somehow managed to have the sequence cache in this SequenceContainer jump to more than 1 greater than the longest stored sequence.  "
                                                                          "Don't know how that happened, but if you see this error then the class needs a patch.");
                    }
                    // Compare current cache to existing stored sequences
                    MetaCode New = this->ProcessSequence(this->CurrSequenceCache.begin(),this->CurrSequenceCache.end());
                    if( NullMetaCode != New )
                        SequenceCodes.push_back(New);
                }
            }
        }
    }//Input
}//Mezzanine

#endif