/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   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 .

 */

#pragma once

#include "Tickmarks.hxx"

#include <memory>

#include <o3tl/safeint.hxx>

namespace chart

{

class EquidistantTickIter : public TickIter

{

public:

    EquidistantTickIter( const css::uno::Sequence< css::uno::Sequence< double > >& rTicks

                , const ExplicitIncrementData& rIncrement

                , sal_Int32 nMaxDepth );

    EquidistantTickIter( TickInfoArraysType& rTickInfos

            , const ExplicitIncrementData& rIncrement

            , sal_Int32 nMaxDepth );

    virtual ~EquidistantTickIter() override;

    double*     firstValue();

    double*     nextValue();

    virtual TickInfo*   firstInfo() override;

    virtual TickInfo*   nextInfo() override;

private: //methods

    sal_Int32   getIntervalCount( sal_Int32 nDepth );

    bool        isAtLastPartTick();

    void        initIter( sal_Int32 nMaxDepth );

    sal_Int32   getStartDepth() const;

    bool        gotoFirst();

    bool        gotoNext();

    double      getTickValue(sal_Int32 nDepth, sal_Int32 nIndex) const

                {

                    if(m_pSimpleTicks)

                        return (*m_pSimpleTicks)[nDepth][nIndex];

                    else

                    {

                        if ((*m_pInfoTicks)[nDepth].size() <= o3tl::make_unsigned(nIndex))

                            return std::numeric_limits<double>::max();

                        return (((*m_pInfoTicks)[nDepth])[nIndex]).fScaledTickValue;

                    }

                }

    sal_Int32   getTickCount( sal_Int32 nDepth ) const

                {

                    if(m_pSimpleTicks)

                        return (*m_pSimpleTicks)[nDepth].getLength();

                    else

                        return (*m_pInfoTicks)[nDepth].size();

                }

    sal_Int32   getMaxDepth() const

                {

                    if(m_pSimpleTicks)

                        return (*m_pSimpleTicks).getLength()-1;

                    else

                        return (*m_pInfoTicks).size()-1;

                }

private: //member

    const css::uno::Sequence< css::uno::Sequence< double > >*  m_pSimpleTicks;

    TickInfoArraysType*       m_pInfoTicks;

    const ExplicitIncrementData& m_rIncrement;

    sal_Int32   m_nMaxDepth;

    sal_Int32   m_nTickCount;

    std::unique_ptr<sal_Int32[]>

                m_pnPositions; //current positions in the different sequences

    std::unique_ptr<sal_Int32[]>

                m_pnPreParentCount; //the tickmarks do not start with a major tick always,

                                    //the PreParentCount states for each depth how many subtickmarks are available in front of the first parent tickmark

    std::unique_ptr<bool[]>

                m_pbIntervalFinished;

    sal_Int32   m_nCurrentDepth;

    sal_Int32   m_nCurrentPos;

    double      m_fCurrentValue;

};

class EquidistantTickFactory

{

public:

    EquidistantTickFactory(

         ExplicitScaleData aScale

        , ExplicitIncrementData aIncrement );

    ~EquidistantTickFactory();

    void getAllTicks( TickInfoArraysType& rAllTickInfos ) const;

    void getAllTicksShifted( TickInfoArraysType& rAllTickInfos ) const;

    static double getMinimumAtIncrement( double fMin, const ExplicitIncrementData& rIncrement );

    static double getMaximumAtIncrement( double fMax, const ExplicitIncrementData& rIncrement );

private: //methods

    void        addSubTicks( sal_Int32 nDepth,

                        css::uno::Sequence< css::uno::Sequence< double > >& rParentTicks ) const;

    double*     getMajorTick( sal_Int32 nTick ) const;

    double*     getMinorTick( sal_Int32 nTick, sal_Int32 nDepth

                    , double fStartParentTick, double fNextParentTick ) const;

    sal_Int32   getMaxTickCount( sal_Int32 nDepth ) const;

    sal_Int32   getTickDepth() const;

    bool        isVisible( double fValue ) const;

    bool        isWithinOuterBorder( double fScaledValue ) const; //all within the outer major tick marks

private: //member

    ExplicitScaleData     m_rScale;

    ExplicitIncrementData m_rIncrement;

    css::uno::Reference< css::chart2::XScaling > m_xInverseScaling;

    //minimum and maximum of the visible range after scaling

    double    m_fScaledVisibleMin;

    double    m_fScaledVisibleMax;

    std::unique_ptr<double[]>

              m_pfCurrentValues;

    //major-tick positions that may lay outside the visible range but complete partly visible intervals at the borders

    double    m_fOuterMajorTickBorderMin;

    double    m_fOuterMajorTickBorderMax;

    double    m_fOuterMajorTickBorderMin_Scaled;

    double    m_fOuterMajorTickBorderMax_Scaled;

};

} //namespace chart

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